/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --ink: #121214;
  --copper-dark: #B08D57;
  --copper-light: #C9A96A;
  --copper-glow: #D9B87C;
  --cream: #F7F5F2;
  --paper: #FFFFFF;
  --ash: #6B6B6B;
  --line: #E5E2DD;
  --deep-text: #D5D2CE;
  --deep-label: #9A9A9E;
  --deep-line: rgba(255, 255, 255, 0.08);
  --footer-bg: #0E0E10;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;
  --shadow-card: 0 12px 32px rgba(18, 18, 20, 0.08);
  --transition: 200ms ease-out;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Arial", sans-serif;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--copper-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--copper-light); }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: 100%; border: none; background: none; outline: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; width: 100%; }
@media screen and (max-width: 639px) {
  .container { padding: 0 16px; }
}

/* ===== Foundation 栅格覆盖 ===== */
.grid-container { max-width: 1280px; }
.cell { margin-bottom: 0; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-align: center;
}
.btn-primary {
  background: var(--copper-light);
  color: var(--ink);
  border: 1px solid var(--copper-light);
}
.btn-primary:hover {
  background: var(--copper-dark);
  border-color: var(--copper-dark);
  color: var(--ink);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--deep-text);
  border: 1px solid rgba(255, 255, 255, 0.4);
}
.btn-outline:hover {
  border-color: var(--copper-light);
  color: var(--copper-light);
  transform: translateY(-1px);
}
.btn-outline-dark {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-outline-dark:hover {
  border-color: var(--copper-light);
  color: var(--copper-dark);
}
.btn:focus, .btn:active { outline: 2px solid var(--copper-light); outline-offset: 3px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  min-height: 76px;
  display: flex;
  align-items: center;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
}
.brand-logo {
  font-family: var(--font-serif);
  font-size: 23px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
}
.brand-logo:hover { color: var(--copper-light); }
.main-nav { display: flex; align-items: center; justify-content: flex-end; flex: 1; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
}
.nav-list li { margin: 0; }
.nav-list a {
  position: relative;
  display: inline-block;
  padding: 26px 14px;
  font-size: 15px;
  font-weight: 500;
  color: #DAD8D4;
  line-height: 1.2;
  transition: color var(--transition);
}
.nav-list a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--copper-light);
  transition: width 0.3s ease-out;
}
.nav-list a:hover { color: var(--copper-light); }
.nav-list a:hover::after { width: 100%; }
.nav-list a.active { color: var(--copper-light); }
.nav-list a.active::after { width: 100%; }
.nav-cta { margin-left: 18px; }
.btn-nav {
  padding: 11px 26px;
  font-size: 15px;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-size: 18px;
  background: transparent;
  transition: all var(--transition);
}
.nav-toggle:hover { border-color: var(--copper-light); color: var(--copper-light); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  background-color: var(--ink);
  background-image: url("/assets/images/backpic/back-1.png");
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(18, 18, 20, 0.82) 0%, rgba(18, 18, 20, 0.55) 60%, rgba(18, 18, 20, 0.35) 100%);
}
.hero ::before .hero-inner {
  position: relative;
  z-index: 2;
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 80px 0;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--deep-label);
  text-transform: uppercase;
  margin-bottom: 28px;
}
.hero-eyebrow::before {
  content: "";
  display: block;
  width: 32px;
  height: 1px;
  background: var(--copper-light);
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 60px;
  font-weight: 600;
  line-height: 1.25;
  color: #FFF8F0;
  margin-bottom: 24px;
  max-width: 720px;
}
.hero-title .title-line { display: block; }
.hero-title .title-line-sub {
  display: block;
  font-size: 36px;
  font-weight: 400;
  color: var(--deep-text);
  margin-top: 8px;
}
.hero-subtitle {
  font-size: 17px;
  color: var(--deep-text);
  line-height: 1.8;
  max-width: 500px;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-shortcut {
  position: absolute;
  bottom: 32px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 28px;
  color: var(--deep-label);
  font-size: 13px;
  letter-spacing: 0.02em;
}
.hero-shortcut span { display: inline-flex; align-items: center; gap: 8px; }
.hero-shortcut i { color: var(--copper-light); }

/* ===== 区块通用 ===== */
.section { padding: clamp(72px, 8vw, 128px) 0; }
.section-light { background: var(--paper); }
.section-cream { background: var(--cream); }
.section-dark {
  background: var(--ink);
  color: var(--deep-text);
}
.section-head {
  margin-bottom: 52px;
  max-width: 720px;
}
.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper-dark);
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-head .section-title {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 14px;
}
.section-head .section-desc {
  font-size: 17px;
  color: var(--ash);
  line-height: 1.8;
}
.section-dark .section-head .section-title { color: #FFFFFF; }
.section-dark .section-head .section-desc { color: var(--deep-label); }
.section-center { text-align: center; }

/* ===== 核心服务 ===== */
.service-list {
  border-top: 1px solid var(--line);
}
.service-item {
  display: flex;
  align-items: center;
  padding: 32px 24px;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background var(--transition);
}
.service-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background var(--transition);
}
.service-item:hover { background: #F0EEE9; }
.service-item:hover::before { background: var(--copper-light); }
.service-num {
  width: 64px;
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 600;
  color: var(--copper-dark);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.service-body { flex: 1; padding: 0 28px; }
.service-body h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}
.service-body p {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.7;
  margin: 0;
}
.service-arrow {
  font-size: 18px;
  color: var(--ash);
  transition: all var(--transition);
}
.service-item:hover .service-arrow {
  transform: translateX(6px);
  color: var(--copper-dark);
}
.service-item:hover .service-body h3 {
  color: var(--copper-dark);
}

/* ===== 平台数据 ===== */
.stats-section {
  background: var(--ink);
  position: relative;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
  padding: 32px 16px;
  position: relative;
}
.stat-item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 1px;
  background: var(--copper-light);
}
.stat-num {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 600;
  color: var(--copper-light);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}
.stat-label {
  font-size: 15px;
  color: var(--deep-label);
  letter-spacing: 0.02em;
}

/* ===== 案例 ===== */
.case-item {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 64px;
}
.case-item:last-child { margin-bottom: 0; }
.case-item:nth-child(even) .case-img { order: 2; }
.case-item:nth-child(even) .case-content { order: 1; }
.case-img {
  flex: 0 0 58%;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}
.case-img img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  transition: transform 0.5s ease-out;
}
.case-img:hover img { transform: scale(1.03); }
.case-content { flex: 1; }
.case-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--copper-dark);
  background: rgba(176, 141, 87, 0.1);
  padding: 5px 14px;
  border-radius: 30px;
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}
.case-content h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.case-content p {
  font-size: 16px;
  color: var(--ash);
  line-height: 1.85;
  margin-bottom: 18px;
}
.case-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--copper-dark);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.case-link i { font-size: 13px; transition: transform var(--transition); }
.case-link:hover i { transform: translateX(4px); }

/* ===== 解决方案 ===== */
.solutions-section { background: var(--paper); }
.solutions-layout {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 64px;
  align-items: start;
}
.solution-sidebar {
  position: sticky;
  top: 100px;
}
.solution-sidebar .section-title {
  font-family: var(--font-serif);
  font-size: 38px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 20px;
}
.solution-sidebar p {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.8;
}
.solution-accordion .accordion-item {
  background: transparent;
  border-bottom: 1px solid var(--line);
}
.solution-accordion .accordion-item.is-active {
  background: #FCFAF7;
}
.solution-accordion .accordion-title {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  padding: 24px 40px 24px 20px;
  position: relative;
  background: transparent;
  border: none;
  transition: color var(--transition);
}
.solution-accordion .accordion-title:hover {
  color: var(--copper-dark);
  background: transparent;
}
.solution-accordion .accordion-title::before {
  content: "\f107";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform var(--transition);
  color: var(--copper-dark);
}
.solution-accordion .accordion-item.is-active .accordion-title::before {
  transform: translateY(-50%) rotate(180deg);
}
.solution-accordion .accordion-content {
  padding: 0 20px 24px;
  border: none;
  background: transparent;
}
.solution-accordion .accordion-content p {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.85;
}

/* ===== 资讯动态 ===== */
.news-section { background: var(--cream); }
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.news-row {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 28px 24px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  transition: all var(--transition);
}
.news-row:hover {
  background: #F0EEE9;
  box-shadow: var(--shadow-card);
}
.news-row:hover .news-arrow { transform: translateX(6px); }
.news-row:hover .news-thumb img { transform: scale(1.05); }
.news-thumb {
  flex: 0 0 160px;
  height: 100px;
  border-radius: var(--radius-md);
  overflow: hidden;
  flex-shrink: 0;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease-out;
}
.news-content {
  flex: 1;
  min-width: 0;
}
.news-content .news-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--copper-dark);
  background: rgba(176, 141, 87, 0.08);
  padding: 3px 12px;
  border-radius: 30px;
  margin-bottom: 8px;
  letter-spacing: 0.03em;
}
.news-content h4, .news-content h3 {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-content p {
  font-size: 14px;
  color: var(--ash);
  line-height: 1.7;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-content .news-time {
  font-size: 13px;
  color: #999;
}
.news-arrow {
  flex-shrink: 0;
  font-size: 16px;
  color: var(--ash);
  transition: transform var(--transition);
}
.news-empty {
  text-align: center;
  padding: 80px 20px;
  background: var(--paper);
}
.news-empty i {
  font-size: 48px;
  color: #CCC;
  margin-bottom: 16px;
  display: block;
}
.news-empty p {
  font-size: 16px;
  color: var(--ash);
}

/* ===== FAQ ===== */
.faq-section { background: var(--paper); }
.faq-centered {
  max-width: 860px;
  margin: 0 auto;
}
.faq-accordion .accordion-item {
  background: transparent;
  border-bottom: 1px solid var(--line);
}
.faq-accordion .accordion-item.is-active {
  background: transparent;
}
.faq-accordion .accordion-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding: 26px 48px 26px 16px;
  position: relative;
  background: transparent;
  border: none;
  letter-spacing: 0.01em;
}
.faq-accordion .accordion-title:hover {
  color: var(--copper-dark);
  background: transparent;
}
.faq-accordion .accordion-title::before {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--copper-dark);
  transition: transform var(--transition);
}
.faq-accordion .accordion-item.is-active .accordion-title::before {
  content: "\f00d";
}
.faq-accordion .accordion-content {
  padding: 0 16px 24px;
  border: none;
  background: transparent;
}
.faq-accordion .accordion-content p {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.85;
  max-width: 720px;
}

/* ===== 联系我们 ===== */
.contact-section {
  background: var(--ink);
  color: var(--deep-text);
}
.contact-layout {
  display: grid;
  grid-template-columns: 6fr 6fr;
  gap: 72px;
  align-items: start;
}
.contact-info .section-title {
  font-family: var(--font-serif);
  font-size: 38px;
  font-weight: 600;
  color: #FFFFFF;
  line-height: 1.35;
  margin-bottom: 18px;
}
.contact-info > p {
  font-size: 16px;
  color: var(--deep-label);
  line-height: 1.85;
  margin-bottom: 32px;
}
.contact-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
}
.contact-meta i {
  font-size: 18px;
  color: var(--copper-light);
  width: 22px;
  text-align: center;
}
.contact-meta span {
  font-size: 15px;
  color: var(--deep-text);
}
.contact-form { width: 100%; }
.form-group { margin-bottom: 28px; }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #A0A0A4;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 0;
  font-size: 16px;
  color: #FFFFFF;
  background: transparent;
  border: none;
  border-bottom: 1px solid #4A4A4E;
  border-radius: 0;
  transition: border-color var(--transition);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--deep-label);
}
.form-group input:focus,
.form-group textarea:focus {
  border-bottom-color: var(--copper-light);
  box-shadow: inset 0 -2px 0 var(--copper-light);
}
.form-group textarea {
  min-height: 90px;
  resize: vertical;
}
.form-group .form-error { display: none; }
.form-group.has-error input,
.form-group.has-error textarea {
  border-bottom-color: #C0533F;
}
.form-group.has-error .form-error {
  display: block;
  font-size: 13px;
  color: #C0533F;
  margin-top: 6px;
}
.form-submit-msg {
  display: none;
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
}
.form-submit-msg.success { color: var(--copper-light); }
.form-submit-msg.error { color: #C0533F; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: #B8B5B0;
  padding-top: 72px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 4fr 2fr 3fr 3fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand-logo {
  font-size: 22px;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--deep-label);
  line-height: 1.8;
  max-width: 260px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 14px;
  color: #B8B5B0;
  transition: color var(--transition);
}
.footer-col ul a:hover { color: var(--copper-light); }
.footer-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  margin-bottom: 14px;
  color: var(--deep-label);
}
.footer-contact-list i {
  color: var(--copper-light);
  margin-top: 3px;
  font-size: 14px;
  width: 16px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: #6B6B6B;
}

/* ===== 动画 & 可访问性 ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
  html { scroll-behavior: auto; }
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1023px) {
  .hero-title { font-size: 48px; }
  .case-item { flex-direction: column; gap: 24px; }
  .case-item:nth-child(even) .case-img { order: 0; }
  .case-item:nth-child(even) .case-content { order: 0; }
  .case-img { flex: 1 1 auto; width: 100%; }
  .case-img img { height: 280px; }
  .solutions-layout { grid-template-columns: 1fr; gap: 40px; }
  .solution-sidebar { position: static; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .news-row { gap: 20px; }
  .news-thumb { flex-basis: 140px; height: 90px; }
}

@media screen and (max-width: 767px) {
  .site-header {
    min-height: 64px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--ink);
    flex-direction: column;
    padding: 16px 24px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-120%);
    transition: transform 0.3s ease-out;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
    z-index: 99;
    opacity: 0;
    pointer-events: none;
  }
  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .nav-list a {
    display: block;
    padding: 16px 8px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .nav-list a::after { display: none; }
  .nav-list a.active {
    color: var(--copper-light);
    border-left: 3px solid var(--copper-light);
    padding-left: 16px;
  }
  .nav-cta {
    margin: 20px 0 0;
    width: 100%;
  }
  .btn-nav { width: 100%; }
}

@media screen and (max-width: 639px) {
  .hero { min-height: 520px; }
  .hero-title { font-size: 38px; margin-bottom: 18px; }
  .hero-title .title-line-sub { font-size: 26px; }
  .hero-subtitle { font-size: 15px; margin-bottom: 28px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; }
  .hero-shortcut { display: none; }
  .section { padding: 60px 0; }
  .section-head .section-title { font-size: 30px; }
  .section-head { margin-bottom: 36px; }
  .service-item { flex-wrap: wrap; padding: 24px 16px; }
  .service-num { width: auto; font-size: 28px; margin-bottom: 8px; }
  .service-body { padding: 12px 0 0; width: 100%; }
  .service-arrow { display: none; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-num { font-size: 38px; }
  .stat-label { font-size: 13px; }
  .case-item { margin-bottom: 48px; }
  .case-content h3 { font-size: 24px; }
  .news-row { flex-wrap: wrap; gap: 14px; padding: 20px 16px; }
  .news-thumb { flex-basis: 100%; height: 140px; }
  .news-content h4 { font-size: 17px; white-space: normal; }
  .news-content p { font-size: 13px; }
  .news-arrow { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-layout { gap: 36px; }
  .faq-accordion .accordion-title { font-size: 15px; padding-right: 36px; }
  .btn { padding: 13px 24px; }
}

@media screen and (max-width: 380px) {
  .hero-title { font-size: 32px; }
  .hero-title .title-line-sub { font-size: 22px; }
}

/* roulang page: category1 */
:root{
  --ink:#121214;
  --copper:#B08D57;
  --copper-bright:#C9A96A;
  --cream:#F7F5F2;
  --paper:#FFFFFF;
  --gray-text:#6B6B6B;
  --line:#E5E2DD;
  --dark-text:#D5D2CE;
  --dark-label:#9A9A9E;
  --footer-bg:#0E0E10;
  --radius-sm:2px;
  --radius-md:4px;
  --shadow-hover:0 12px 32px rgba(18,18,20,0.08);
  --transition:all 0.2s ease-out;
  --font-title:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-body:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--cream);
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:var(--transition);}
ul,ol{list-style:none;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
input,textarea{font-family:inherit;font-size:16px;}

.container{max-width:1280px;margin:0 auto;padding:0 32px;}
.section{padding:clamp(72px,8vw,128px) 0;}

/* 按钮 */
.btn{
  display:inline-block;
  padding:12px 28px;
  font-size:15px;
  font-weight:500;
  border-radius:var(--radius-sm);
  text-align:center;
  transition:var(--transition);
  border:1px solid transparent;
  line-height:1.4;
}
.btn-primary{
  background:var(--copper-bright);
  color:var(--ink);
}
.btn-primary:hover{
  background:var(--copper);
  color:#fff;
  transform:translateY(-1px);
}
.btn-outline{
  background:transparent;
  color:#E8E5E0;
  border-color:rgba(255,255,255,0.35);
}
.btn-outline:hover{
  border-color:var(--copper-bright);
  color:var(--copper-bright);
}
.btn-nav{
  background:var(--copper-bright);
  color:var(--ink);
  padding:10px 24px;
  font-size:14px;
}
.btn-nav:hover{background:var(--copper);color:#fff;transform:none;}
.btn-submit{background:var(--copper-bright);color:var(--ink);padding:14px 40px;font-size:15px;border-radius:var(--radius-sm);transition:var(--transition);}
.btn-submit:hover{background:var(--copper);color:#fff;transform:translateY(-1px);}

/* Header */
.site-header{
  background:var(--ink);
  height:76px;
  position:sticky;
  top:0;
  z-index:100;
  display:flex;
  align-items:center;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.header-inner{width:100%;display:flex;align-items:center;justify-content:space-between;}
.brand-logo{
  font-size:22px;
  font-weight:700;
  color:#fff;
  font-family:var(--font-title);
  letter-spacing:0.02em;
  white-space:nowrap;
}
.brand-logo:hover{color:var(--copper-bright);}
.main-nav{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:36px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:28px;
}
.nav-list a{
  color:#DAD8D4;
  font-size:15px;
  font-weight:500;
  position:relative;
  padding:8px 2px;
  letter-spacing:0.01em;
}
.nav-list a::after{
  content:"";
  position:absolute;
  bottom:0;left:0;
  width:0;height:2px;
  background:var(--copper-bright);
  transition:width 0.25s ease-out;
}
.nav-list a:hover{color:var(--copper-bright);}
.nav-list a:hover::after{width:100%;}
.nav-list a.active{color:var(--copper-bright);}
.nav-list a.active::after{width:100%;}
.nav-cta{margin-left:8px;}
.nav-toggle{
  display:none;
  color:#fff;
  font-size:22px;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border-radius:var(--radius-sm);
  transition:var(--transition);
}
.nav-toggle:hover{background:rgba(255,255,255,0.08);color:var(--copper-bright);}

/* 分类页页头 */
.page-hero{
  position:relative;
  min-height:320px;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  display:flex;
  align-items:center;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(18,18,20,0.68);
}
.page-hero .container{position:relative;z-index:2;}
.breadcrumb{
  font-size:14px;
  color:rgba(255,255,255,0.65);
  margin-bottom:18px;
  letter-spacing:0.02em;
}
.breadcrumb a{color:rgba(255,255,255,0.65);}
.breadcrumb a:hover{color:var(--copper-bright);}
.breadcrumb .sep{margin:0 10px;color:rgba(255,255,255,0.35);}
.breadcrumb .current{color:var(--copper-bright);}
.page-hero h1{
  font-family:var(--font-title);
  font-size:44px;
  font-weight:600;
  color:#fff;
  line-height:1.2;
  margin-bottom:14px;
}
.page-hero .sub-title{
  font-size:16px;
  color:var(--dark-text);
  max-width:640px;
  line-height:1.8;
}

/* 板块标题 */
.section-head{
  margin-bottom:48px;
  max-width:780px;
}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-size:13px;
  font-weight:500;
  color:var(--copper);
  letter-spacing:0.08em;
  text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:32px;height:2px;
  background:var(--copper-bright);
}
.section-head.center .eyebrow::after{
  content:"";
  width:32px;height:2px;
  background:var(--copper-bright);
}
.section-title{
  font-family:var(--font-title);
  font-size:36px;
  font-weight:600;
  line-height:1.25;
  color:var(--ink);
  margin-bottom:16px;
  text-wrap:balance;
}
.section-desc{
  font-size:17px;
  color:var(--gray-text);
  line-height:1.8;
}

/* 平台简介区 */
.platform-intro{
  background:var(--paper);
}
.intro-grid{
  display:grid;
  grid-template-columns:1.1fr 0.9fr;
  gap:72px;
  align-items:center;
}
.intro-quote{
  font-family:var(--font-title);
  font-size:26px;
  line-height:1.6;
  color:var(--ink);
  font-weight:600;
  margin:28px 0 20px;
  padding-left:22px;
  border-left:3px solid var(--copper-bright);
}
.intro-text{
  font-size:16px;
  color:var(--gray-text);
  line-height:1.9;
  margin-bottom:32px;
}
.intro-list{
  margin-top:12px;
}
.intro-list li{
  display:flex;
  align-items:flex-start;
  gap:14px;
  padding:12px 0;
  border-bottom:1px solid var(--line);
  font-size:15px;
  color:var(--ink);
}
.intro-list li i{
  color:var(--copper-bright);
  margin-top:4px;
  font-size:15px;
}
.intro-list li span{color:var(--gray-text);}
.intro-image{
  position:relative;
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-hover);
}
.intro-image img{
  width:100%;
  height:420px;
  object-fit:cover;
  transition:transform 0.5s ease;
}
.intro-image:hover img{transform:scale(1.03);}
.intro-image .img-caption{
  position:absolute;
  bottom:0;left:0;right:0;
  background:linear-gradient(to top,rgba(18,18,20,0.8),transparent);
  padding:48px 24px 20px;
  color:#fff;
  font-size:14px;
}

/* 功能模块 */
.feature-section{background:var(--cream);}
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.feature-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:36px 28px;
  transition:var(--transition);
  position:relative;
  overflow:hidden;
}
.feature-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
  border-color:rgba(176,141,87,0.4);
}
.feature-card .icon-wrap{
  width:52px;height:52px;
  border-radius:var(--radius-sm);
  background:rgba(201,169,106,0.12);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:22px;
  font-size:22px;
  color:var(--copper-bright);
}
.feature-card h3{
  font-family:var(--font-title);
  font-size:19px;
  font-weight:600;
  margin-bottom:12px;
  color:var(--ink);
}
.feature-card p{
  font-size:14.5px;
  color:var(--gray-text);
  line-height:1.8;
}

/* 深色数据区 */
.data-section{
  background:var(--ink);
  color:#fff;
  position:relative;
}
.data-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity:0.12;
}
.data-section .container{position:relative;z-index:2;}
.data-section .section-title{color:#fff;}
.data-section .section-desc{color:var(--dark-text);}
.data-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  margin-top:16px;
}
.data-item{
  padding:32px 16px;
  text-align:center;
  border-right:1px solid rgba(255,255,255,0.08);
  position:relative;
}
.data-item:last-child{border-right:none;}
.data-item .number{
  font-size:52px;
  font-weight:700;
  color:var(--copper-bright);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
  margin-bottom:10px;
}
.data-item .label{
  font-size:14px;
  color:var(--dark-text);
  letter-spacing:0.04em;
}
.data-item::after{
  content:"";
  position:absolute;
  bottom:0;left:50%;
  transform:translateX(-50%);
  width:32px;height:2px;
  background:var(--copper-bright);
}

/* 服务流程 */
.steps-section{background:var(--paper);}
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:32px;
  margin-top:24px;
}
.step-card{
  text-align:center;
  padding:40px 20px;
  position:relative;
}
.step-card .step-number{
  font-family:var(--font-title);
  font-size:44px;
  font-weight:700;
  color:rgba(176,141,87,0.25);
  line-height:1;
  margin-bottom:18px;
  font-variant-numeric:tabular-nums;
}
.step-card h3{
  font-size:17px;
  font-weight:600;
  margin-bottom:10px;
  color:var(--ink);
}
.step-card p{
  font-size:14px;
  color:var(--gray-text);
  line-height:1.8;
}
.step-card::after{
  content:"";
  position:absolute;
  top:52px;right:-16px;
  width:32px;height:1px;
  background:var(--line);
}
.step-card:last-child::after{display:none;}

/* 平台亮点 */
.highlight-section{background:var(--cream);}
.highlight-row{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:72px;
  align-items:center;
  margin-bottom:64px;
}
.highlight-row:last-child{margin-bottom:0;}
.highlight-image{
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:0 8px 24px rgba(18,18,20,0.06);
}
.highlight-image img{
  width:100%;
  height:340px;
  object-fit:cover;
  transition:transform 0.5s ease;
}
.highlight-image:hover img{transform:scale(1.03);}
.highlight-content h3{
  font-family:var(--font-title);
  font-size:26px;
  font-weight:600;
  margin-bottom:16px;
  color:var(--ink);
}
.highlight-content p{
  font-size:15.5px;
  color:var(--gray-text);
  line-height:1.85;
  margin-bottom:20px;
}
.highlight-tags{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.tag{
  display:inline-block;
  padding:6px 14px;
  border-radius:20px;
  background:rgba(176,141,87,0.1);
  color:var(--copper);
  font-size:13px;
  font-weight:500;
}

/* FAQ */
.faq-section{background:var(--paper);}
.faq-wrap{
  max-width:960px;
  margin:0 auto;
}
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item:first-child{border-top:1px solid var(--line);}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:22px 8px;
  text-align:left;
  font-size:16px;
  font-weight:600;
  color:var(--ink);
  transition:var(--transition);
  background:transparent;
  cursor:pointer;
}
.faq-question:hover{color:var(--copper);}
.faq-question .icon{
  width:28px;height:28px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:18px;
  color:var(--copper-bright);
  transition:transform 0.25s ease;
  flex-shrink:0;
}
.faq-item.is-open .faq-question .icon{
  transform:rotate(45deg);
  color:var(--copper);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height 0.3s ease;
}
.faq-answer-inner{
  padding:0 8px 24px;
  font-size:15px;
  color:var(--gray-text);
  line-height:1.85;
}
.faq-item.is-open .faq-answer{max-height:400px;}

/* CTA */
.cta-section{
  background:var(--ink);
  position:relative;
  overflow:hidden;
}
.cta-section::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:0.18;
}
.cta-section .container{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:48px;
}
.cta-title{
  font-family:var(--font-title);
  font-size:32px;
  font-weight:600;
  color:#fff;
  line-height:1.3;
  margin-bottom:12px;
}
.cta-desc{
  font-size:15px;
  color:var(--dark-text);
  max-width:560px;
  line-height:1.8;
}
.cta-actions{
  display:flex;
  gap:16px;
  flex-shrink:0;
}

/* 联系信息 */
.contact-strip{
  background:var(--cream);
  padding:64px 0;
}
.contact-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.contact-card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:32px 28px;
  text-align:center;
  transition:var(--transition);
}
.contact-card:hover{
  box-shadow:var(--shadow-hover);
  transform:translateY(-2px);
}
.contact-card i{
  font-size:28px;
  color:var(--copper-bright);
  margin-bottom:18px;
}
.contact-card h3{
  font-size:17px;
  font-weight:600;
  margin-bottom:8px;
}
.contact-card p{
  font-size:14.5px;
  color:var(--gray-text);
  line-height:1.7;
}

/* Footer */
.site-footer{
  background:var(--footer-bg);
  color:#B8B5B0;
  padding-top:72px;
}
.site-footer .brand-logo{color:#fff;}
.footer-grid{
  display:grid;
  grid-template-columns:1.2fr 0.8fr 0.8fr 1fr;
  gap:48px;
  padding-bottom:56px;
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.footer-brand p{
  margin-top:20px;
  font-size:14px;
  line-height:1.8;
  color:#8A8A8E;
  max-width:280px;
}
.footer-col h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:22px;
  letter-spacing:0.02em;
}
.footer-col ul li{
  margin-bottom:12px;
}
.footer-col ul li a{
  font-size:14px;
  color:#B8B5B0;
  transition:var(--transition);
}
.footer-col ul li a:hover{color:var(--copper-bright);padding-left:4px;}
.footer-contact-list li{
  display:flex;
  align-items:flex-start;
  gap:12px;
  font-size:14px;
  color:#8A8A8E;
}
.footer-contact-list i{
  color:var(--copper);
  font-size:14px;
  margin-top:4px;
}
.footer-bottom{
  padding:24px 0;
  text-align:center;
  font-size:13px;
  color:#6B6B6B;
}
.footer-bottom p{font-size:13px;display:flex;justify-content:center;align-items:center;gap:16px;}

/* 响应式 */
@media (max-width:1024px){
  .container{padding:0 24px;}
  .main-nav{gap:20px;}
  .nav-list{gap:18px;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .data-grid{grid-template-columns:repeat(2,1fr);}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .step-card::after{display:none;}
  .intro-grid,.highlight-row{grid-template-columns:1fr;gap:48px;}
  .cta-section .container{flex-direction:column;text-align:center;}
  .cta-desc{margin-left:auto;margin-right:auto;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px;}
  .contact-grid{grid-template-columns:1fr;}
  .highlight-image img{height:280px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .site-header{height:64px;}
  .brand-logo{font-size:18px;}
  .nav-toggle{
    display:flex;
  }
  .main-nav{
    position:fixed;
    top:64px;
    right:-100%;
    width:85%;
    max-width:320px;
    height:calc(100vh - 64px);
    background:var(--ink);
    flex-direction:column;
    justify-content:flex-start;
    align-items:flex-start;
    padding:32px 24px;
    gap:28px;
    transition:right 0.3s ease;
    z-index:99;
    overflow-y:auto;
  }
  .main-nav.open{right:0;}
  .nav-list{
    flex-direction:column;
    align-items:flex-start;
    gap:18px;
    width:100%;
  }
  .nav-list a{
    font-size:16px;
    display:block;
    width:100%;
    padding:10px 0;
    border-bottom:1px solid rgba(255,255,255,0.06);
  }
  .nav-cta{
    margin-top:8px;
    width:100%;
  }
  .nav-cta .btn{width:100%;}
  .page-hero{min-height:300px;}
  .page-hero h1{font-size:32px;}
  .section{padding:64px 0;}
  .section-title{font-size:28px;}
  .section-desc{font-size:15px;}
  .intro-quote{font-size:21px;}
  .intro-image img{height:260px;}
  .feature-grid{grid-template-columns:1fr;}
  .data-grid{grid-template-columns:1fr 1fr;gap:16px;}
  .data-item .number{font-size:36px;}
  .steps-grid{grid-template-columns:1fr;}
  .step-card{max-width:320px;margin:0 auto;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom p{flex-direction:column;gap:6px;}
  .page-hero .sub-title{font-size:14.5px;line-height:1.7;}
  .cta-actions{flex-direction:column;width:100%;}
  .cta-actions .btn{width:100%;}
  .cta-title{font-size:26px;}
  .breadcrumb{font-size:13px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:0.01ms !important;
    transition-duration:0.01ms !important;
  }
  .intro-image img,.highlight-image img{transform:none !important;}
  .feature-card,.contact-card{transform:none !important;}
  .nav-list a::after{transition:none;}
}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --ink: #121214;
            --copper: #B08D57;
            --copper-bright: #C9A96A;
            --cream: #F7F5F2;
            --paper: #FFFFFF;
            --gray: #6B6B6B;
            --line: #E5E2DD;
            --dark-text: #D5D2CE;
            --dark-muted: #9A9A9E;
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow: 0 12px 32px rgba(18, 18, 20, 0.08);
            --ease: 160ms ease-out;
            --container: 1280px;
            --serif: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', SimSun, serif;
            --sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ink);
            background: var(--cream);
            -webkit-font-smoothing: antialiased;
            word-wrap: break-word;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--ease);
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--serif);
            font-weight: 600;
            margin: 0;
            line-height: 1.3;
        }
        .grid-container {
            max-width: var(--container);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 34px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            text-align: center;
            line-height: 1.4;
            transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(201, 169, 106, 0.45);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--copper-bright);
            color: var(--ink);
        }
        .btn-primary:hover {
            background: var(--copper);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.4);
            color: #EBE9E6;
        }
        .btn-outline:hover {
            border-color: var(--copper-bright);
            color: var(--copper-bright);
        }
        .btn-nav {
            padding: 10px 28px;
            font-size: 14px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--ink);
            height: 76px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .header-inner {
            height: 76px;
        }
        .brand-logo {
            font-family: var(--serif);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.03em;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            line-height: 1;
        }
        .brand-logo:hover {
            color: var(--copper-bright);
        }
        .main-nav {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 2rem;
        }
        .nav-list {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 2rem;
            margin: 0;
        }
        .nav-list li {
            margin: 0;
        }
        .nav-list a {
            display: block;
            font-size: 15px;
            font-weight: 500;
            color: #DAD8D4;
            padding: 8px 0;
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--copper-bright);
            transition: width 0.22s ease-out;
        }
        .nav-list a:hover {
            color: var(--copper-bright);
        }
        .nav-list a:hover::after,
        .nav-list a.active::after {
            width: 100%;
        }
        .nav-list a.active {
            color: var(--copper-bright);
        }
        .nav-cta {
            margin-left: 1rem;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #FFFFFF;
            font-size: 22px;
            cursor: pointer;
            padding: 10px 8px;
            border-radius: var(--radius-sm);
            transition: color var(--ease);
        }
        .nav-toggle:hover {
            color: var(--copper-bright);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--copper-bright);
            outline-offset: 2px;
        }

        /* ===== 文章页头 ===== */
        .article-hed {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            padding: 64px 0;
            background:
                linear-gradient(rgba(18, 18, 20, 0.72), rgba(18, 18, 20, 0.72)),
                url('/assets/images/backpic/back-2.png') center / cover no-repeat;
        }
        .article-hed .grid-container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            font-size: 14px;
            color: var(--dark-muted);
            margin-bottom: 20px;
            gap: 0;
        }
        .breadcrumb a {
            color: var(--dark-text);
            padding: 2px 0;
        }
        .breadcrumb a:hover {
            color: var(--copper-bright);
        }
        .breadcrumb .sep {
            margin: 0 12px;
            color: var(--dark-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--copper-bright);
            max-width: 520px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .article-hed h1 {
            font-family: var(--serif);
            font-size: 44px;
            font-weight: 600;
            color: var(--cream);
            margin: 0 0 22px;
            line-height: 1.3;
            letter-spacing: 0.01em;
            text-wrap: balance;
            max-width: 920px;
        }
        .article-hed-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--dark-text);
        }
        .meta-cat {
            display: inline-block;
            background: rgba(201, 169, 106, 0.14);
            border: 1px solid rgba(201, 169, 106, 0.4);
            color: var(--copper-bright);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .meta-cat:hover {
            background: rgba(201, 169, 106, 0.24);
        }
        .article-hed-meta .meta-date,
        .article-hed-meta .meta-views {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-hed-meta i {
            color: var(--copper-bright);
            font-size: 14px;
        }

        /* ===== 正文阅读区 ===== */
        .article-main {
            padding: 72px 0 88px;
            background: var(--cream);
        }
        .article-content {
            background: var(--paper);
            padding: clamp(28px, 5vw, 64px);
            border-radius: var(--radius-md);
            border: 1px solid var(--line);
            font-size: 17px;
            line-height: 1.9;
            color: #2A2A2E;
        }
        .article-content> :first-child {
            margin-top: 0;
        }
        .article-content p {
            margin: 0 0 1.2em;
        }
        .article-content h2 {
            font-family: var(--serif);
            font-size: 30px;
            font-weight: 600;
            margin: 1.6em 0 0.7em;
            line-height: 1.35;
            color: var(--ink);
        }
        .article-content h3 {
            font-family: var(--serif);
            font-size: 22px;
            font-weight: 600;
            margin: 1.4em 0 0.6em;
            line-height: 1.4;
            color: var(--ink);
        }
        .article-content h4 {
            font-family: var(--serif);
            font-size: 18px;
            font-weight: 600;
            margin: 1.2em 0 0.5em;
            color: var(--ink);
        }
        .article-content a {
            color: var(--copper);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
        }
        .article-content a:hover {
            color: var(--copper-bright);
        }
        .article-content blockquote {
            margin: 1.6em 0;
            padding: 18px 24px;
            border-left: 3px solid var(--copper);
            background: #F7F5F2;
            color: var(--gray);
            font-style: normal;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
        }
        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.5em 0;
        }
        .article-content ul,
        .article-content ol {
            margin: 1em 0 1.2em;
            padding-left: 1.6em;
        }
        .article-content li {
            margin-bottom: 0.5em;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--line);
            margin: 2em 0;
        }
        .article-content code {
            background: #F7F5F2;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--copper);
        }
        .article-content pre {
            background: var(--ink);
            color: #E8E6E2;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.5em 0;
        }

        /* ===== 内容未找到 ===== */
        .article-not-found {
            text-align: center;
            background: var(--paper);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 72px 32px;
        }
        .not-found-icon {
            font-size: 46px;
            color: var(--copper);
            margin-bottom: 20px;
        }
        .article-not-found h2 {
            font-size: 28px;
            color: var(--ink);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--gray);
            margin-bottom: 28px;
            font-size: 15px;
        }

        /* ===== 相关推荐 ===== */
        .related-posts {
            padding: 72px 0 88px;
            background: var(--cream);
            border-top: 1px solid var(--line);
        }
        .section-head {
            margin-bottom: 44px;
        }
        .section-head .section-eyebrow {
            font-size: 14px;
            font-weight: 500;
            letter-spacing: 0.12em;
            color: var(--copper);
            margin-bottom: 8px;
            display: block;
            text-transform: uppercase;
        }
        .section-head h2 {
            font-size: 36px;
            font-weight: 600;
            color: var(--ink);
            margin: 0;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--paper);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: box-shadow var(--ease), transform var(--ease);
        }
        .related-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .related-thumb {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            flex-shrink: 0;
        }
        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease-out;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.03);
        }
        .thumb-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(18, 18, 20, 0.74);
            color: var(--copper-bright);
            font-size: 12px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 0.03em;
            backdrop-filter: blur(4px);
        }
        .related-body {
            padding: 26px 28px 30px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .related-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--ink);
            margin: 0 0 12px;
            transition: color var(--ease);
        }
        .related-card:hover .related-body h3 {
            color: var(--copper);
        }
        .related-body p {
            font-size: 14px;
            color: var(--gray);
            line-height: 1.7;
            margin: 0 0 auto;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .related-time {
            font-size: 13px;
            color: #A0A0A4;
            margin-top: 16px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-time i {
            font-size: 12px;
        }

        /* ===== 返回列表 ===== */
        .back-nav {
            padding: 8px 0 72px;
            background: var(--cream);
        }
        .back-nav a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--gray);
            padding: 10px 0;
            transition: color var(--ease), gap var(--ease);
        }
        .back-nav a:hover {
            color: var(--copper);
        }
        .back-nav a i {
            font-size: 13px;
            transition: transform var(--ease);
        }
        .back-nav a:hover i {
            transform: translateX(-4px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0E0E10;
            color: #B8B5B0;
            padding: 72px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 52px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-logo {
            font-size: 20px;
            margin-bottom: 0;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--dark-muted);
            margin: 16px 0 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin: 0 0 20px;
            font-family: var(--sans);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 12px;
        }
        .footer-col a {
            font-size: 14px;
            color: #B8B5B0;
            display: inline-block;
            padding: 2px 0;
        }
        .footer-col a:hover {
            color: var(--copper-bright);
        }
        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--dark-muted);
            line-height: 1.6;
        }
        .footer-contact-list i {
            color: var(--copper-bright);
            width: 18px;
            text-align: center;
            font-size: 14px;
            flex-shrink: 0;
        }
        .footer-bottom {
            padding: 26px 0 32px;
            text-align: center;
            font-size: 13px;
            color: var(--dark-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .site-header {
                height: 70px;
            }
            .header-inner {
                height: 70px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--ink);
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 32px 40px;
                gap: 28px;
                transform: translateY(-120%);
                transition: transform 0.3s ease-out;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                z-index: 99;
                box-shadow: 0 24px 40px rgba(0, 0, 0, 0.3);
            }
            .main-nav.is-open {
                transform: translateY(0);
            }
            .nav-list {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                width: 100%;
            }
            .nav-list li {
                width: 100%;
            }
            .nav-list a {
                font-size: 16px;
                padding: 12px 0;
                width: 100%;
            }
            .nav-list a::after {
                display: none;
            }
            .nav-list a.active {
                color: var(--copper-bright);
                padding-left: 16px;
                border-left: 3px solid var(--copper-bright);
            }
            .nav-cta {
                margin: 12px 0 0;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .article-hed h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 639px) {
            .grid-container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .site-header {
                height: 62px;
            }
            .header-inner {
                height: 62px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .main-nav {
                top: 62px;
                padding: 24px 20px 32px;
            }
            .article-hed {
                min-height: 280px;
                padding: 48px 0;
            }
            .article-hed h1 {
                font-size: 30px;
                line-height: 1.35;
                margin-bottom: 18px;
            }
            .article-hed-meta {
                gap: 12px;
                font-size: 13px;
            }
            .article-main {
                padding: 40px 0 56px;
            }
            .article-content {
                padding: 24px 20px;
                font-size: 16px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 24px;
            }
            .article-content h3 {
                font-size: 20px;
            }
            .related-posts {
                padding: 48px 0 64px;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .related-body {
                padding: 20px 20px 24px;
            }
            .back-nav {
                padding-bottom: 48px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 36px;
            }
            .site-footer {
                padding-top: 48px;
            }
        }

        /* ===== 动效降级 ===== */
        @media (prefers-reduced-motion: reduce) {
            * {
                transition-duration: 0.001s !important;
                animation-duration: 0.001s !important;
                scroll-behavior: auto !important;
            }
            .related-card:hover {
                transform: none;
            }
            .related-card:hover .related-thumb img {
                transform: none;
            }
            .nav-list a::after {
                transition: none;
            }
        }

        /* ===== 可访问性焦点 ===== */
        a:focus-visible {
            outline: 3px solid rgba(201, 169, 106, 0.45);
            outline-offset: 2px;
        }

/* roulang page: category2 */
/* ========== 设计变量 ========== */
    :root {
      --ink: #121214;
      --copper-dark: #B08D57;
      --copper-bright: #C9A96A;
      --cream: #F7F5F2;
      --paper: #FFFFFF;
      --limestone: #6B6B6B;
      --line: #E5E2DD;
      --dim-ink: #D5D2CE;
      --placeholder: #9A9A9E;
      --footer-bg: #0E0E10;
      --radius-sm: 2px;
      --radius-md: 4px;
      --shadow-card: 0 12px 32px rgba(18,18,20,0.08);
      --font-serif: "Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
      --font-sans: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
      --transition: all 0.2s ease-out;
    }

    /* ========== Reset / Base ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.75;
      color: var(--ink);
      background: var(--cream);
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    ul { list-style: none; }
    button, input, textarea { font-family: inherit; border: none; outline: none; background: none; }

    ::selection { background: rgba(201,169,106,0.25); }

    /* ========== 容器与栅格 ========== */
    .grid-container {
      max-width: 80rem;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }

    .grid-margin-x > .cell { margin-bottom: 1.25rem; }

    /* ========== 按钮 ========== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      padding: 0.75rem 2rem;
      font-size: 0.9375rem;
      font-weight: 500;
      line-height: 1.4;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--copper-bright);
      color: var(--ink);
      border-color: var(--copper-bright);
    }
    .btn-primary:hover {
      background: var(--copper-dark);
      border-color: var(--copper-dark);
      color: #fff;
      transform: translateY(-1px);
    }
    .btn-primary:active {
      transform: translateY(0);
    }

    .btn-outline {
      background: transparent;
      color: var(--dim-ink);
      border-color: rgba(255,255,255,0.55);
    }
    .btn-outline:hover {
      border-color: var(--copper-bright);
      color: var(--copper-bright);
    }

    .btn-block { width: 100%; }
    .btn-nav { padding: 0.625rem 1.5rem; font-size: 0.875rem; }

    /* ========== Header / 导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--ink);
      height: 76px;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .site-header .header-inner {
      height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      font-family: var(--font-serif);
      font-size: 1.375rem;
      font-weight: 700;
      color: #fff;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }
    .brand-logo:hover { color: var(--copper-bright); }

    .main-nav {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 2rem;
    }

    .nav-list {
      display: flex;
      align-items: center;
      gap: 1.875rem;
      margin: 0;
    }

    .nav-list li { margin: 0; }

    .nav-list a {
      position: relative;
      font-size: 0.9375rem;
      font-weight: 500;
      color: #DAD8D4;
      padding: 0.25rem 0;
      transition: color 0.2s ease-out;
    }
    .nav-list a::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: -4px;
      width: 0;
      height: 2px;
      background: var(--copper-bright);
      transition: width 0.24s ease-out;
    }
    .nav-list a:hover { color: var(--copper-bright); }
    .nav-list a:hover::after { width: 100%; }
    .nav-list a.active { color: var(--copper-bright); }
    .nav-list a.active::after { width: 100%; }

    .nav-cta { margin-left: 0.75rem; }

    .nav-toggle {
      display: none;
      color: #fff;
      font-size: 1.25rem;
      padding: 0.5rem;
      cursor: pointer;
      line-height: 1;
    }

    /* ========== 通用 Section ========== */
    section { padding: 4.5rem 0; }

    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 500;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--copper-dark);
      margin-bottom: 0.875rem;
      padding-left: 2rem;
      position: relative;
    }
    .section-tag::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 1.5rem;
      height: 1px;
      background: var(--copper-bright);
    }

    .section-tag-light {
      color: var(--copper-bright);
    }
    .section-tag-light::before {
      background: var(--copper-bright);
    }

    .section-heading-left { margin-bottom: 2.5rem; }
    .section-heading-left h2,
    .section-heading-center h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      font-weight: 600;
      line-height: 1.3;
      color: var(--ink);
      margin-bottom: 0.75rem;
    }
    .section-heading-left p,
    .section-heading-center p {
      font-size: 1.0625rem;
      color: var(--limestone);
      max-width: 36rem;
      line-height: 1.7;
    }

    .section-heading-center {
      text-align: center;
      margin-bottom: 2.75rem;
    }
    .section-heading-center p {
      margin: 0 auto;
    }
    .section-heading-center .section-tag {
      padding-left: 0;
    }
    .section-heading-center .section-tag::before {
      display: none;
    }

    /* ========== Page Hero ========== */
    .page-hero {
      position: relative;
      min-height: 320px;
      display: flex;
      align-items: center;
      background-size: cover;
      background-position: center;
      color: #fff;
    }
    .page-hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(18,18,20,0.82) 0%, rgba(18,18,20,0.55) 60%, rgba(18,18,20,0.35) 100%);
    }
    .page-hero .grid-container { position: relative; z-index: 1; }
    .page-hero-content { max-width: 44rem; padding: 3.5rem 0; }

    .breadcrumb-nav {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.875rem;
      color: var(--dim-ink);
      margin-bottom: 1.25rem;
    }
    .breadcrumb-nav a {
      color: var(--dim-ink);
      transition: var(--transition);
    }
    .breadcrumb-nav a:hover { color: var(--copper-bright); }
    .breadcrumb-sep { color: var(--placeholder); }
    .breadcrumb-current { color: var(--copper-bright); }

    .page-hero-content h1 {
      font-family: var(--font-serif);
      font-size: clamp(2.25rem, 5vw, 3.25rem);
      font-weight: 600;
      line-height: 1.25;
      margin-bottom: 1rem;
      color: var(--cream);
    }
    .page-hero-content p {
      font-size: 1.0625rem;
      line-height: 1.7;
      color: var(--dim-ink);
      max-width: 34rem;
    }

    /* ========== 核心服务区域 ========== */
    .service-section {
      background: var(--cream);
      padding: clamp(4.5rem, 8vw, 7rem) 0;
    }

    .service-rows {
      border-top: 1px solid var(--line);
    }

    .service-row {
      display: flex;
      align-items: center;
      gap: 1.75rem;
      padding: 1.75rem 1.5rem;
      background: var(--paper);
      border: 1px solid var(--line);
      border-top: none;
      transition: var(--transition);
      position: relative;
    }
    .service-row:first-child {
      border-top: 1px solid var(--line);
    }
    .service-row::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--copper-bright);
      opacity: 0;
      transform: scaleY(0.4);
      transition: all 0.24s ease-out;
    }
    .service-row:hover {
      background: #FBF9F6;
      transform: translateX(6px);
      box-shadow: var(--shadow-card);
    }
    .service-row:hover::before {
      opacity: 1;
      transform: scaleY(1);
    }

    .service-num {
      font-family: var(--font-serif);
      font-size: 1.875rem;
      font-weight: 600;
      color: var(--copper-dark);
      line-height: 1;
      min-width: 3.5rem;
    }

    .service-info h3 {
      font-family: var(--font-serif);
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 0.35rem;
    }
    .service-info p {
      font-size: 0.9375rem;
      color: var(--limestone);
      line-height: 1.7;
      max-width: 38rem;
      margin: 0;
    }

    .service-arrow {
      margin-left: auto;
      color: var(--copper-dark);
      font-size: 1.125rem;
      transition: var(--transition);
      flex-shrink: 0;
    }
    .service-row:hover .service-arrow {
      transform: translateX(4px);
      color: var(--copper-bright);
    }

    /* ========== Sticky 概览 ========== */
    .service-overview {
      position: sticky;
      top: 96px;
    }

    .overview-card {
      background: var(--ink);
      border-radius: var(--radius-md);
      overflow: hidden;
      color: #fff;
    }

    .overview-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      opacity: 0.8;
    }

    .overview-body {
      padding: 1.75rem 1.75rem 2rem;
    }

    .overview-body h3 {
      font-family: var(--font-serif);
      font-size: 1.375rem;
      font-weight: 600;
      margin-bottom: 1.25rem;
      color: var(--copper-bright);
    }

    .overview-body ul {
      margin-bottom: 1.5rem;
    }
    .overview-body ul li {
      display: flex;
      align-items: flex-start;
      gap: 0.625rem;
      font-size: 0.875rem;
      color: var(--dim-ink);
      padding: 0.45rem 0;
      line-height: 1.6;
      border-bottom: 1px solid rgba(255,255,255,0.07);
    }
    .overview-body ul li:last-child { border-bottom: none; }
    .overview-body ul li strong {
      color: #fff;
      font-weight: 500;
      min-width: 3.75rem;
      flex-shrink: 0;
    }

    .overview-body .btn { margin-top: 0.25rem; }

    /* ========== 服务流程 ========== */
    .process-section {
      background: #EFEDE8;
      padding: clamp(4.5rem, 8vw, 7rem) 0;
    }

    .process-grid {
      margin-top: 1rem;
    }

    .process-step {
      background: var(--paper);
      border-radius: var(--radius-md);
      padding: 2rem 1.75rem;
      height: 100%;
      border: 1px solid var(--line);
      transition: var(--transition);
      position: relative;
    }
    .process-step:hover {
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
    }

    .step-num {
      font-family: var(--font-serif);
      font-size: 3rem;
      font-weight: 600;
      color: rgba(176,141,87,0.3);
      line-height: 1;
      display: block;
      margin-bottom: 1rem;
    }

    .step-icon {
      font-size: 1.375rem;
      color: var(--copper-dark);
      margin-bottom: 0.875rem;
      display: inline-block;
    }

    .process-step h3 {
      font-family: var(--font-serif);
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--ink);
      margin-bottom: 0.5rem;
    }
    .process-step p {
      font-size: 0.875rem;
      color: var(--limestone);
      line-height: 1.7;
      margin: 0;
    }

    /* ========== 数据指标 ========== */
    .metrics-section {
      background: var(--ink);
      padding: 4rem 0;
    }

    .metrics-grid {
      text-align: center;
    }

    .metric-item {
      padding: 1.5rem 1rem;
      border-right: 1px solid rgba(255,255,255,0.07);
      color: #fff;
    }
    .metrics-grid .cell:last-child .metric-item { border-right: none; }
    .metrics-grid .cell:nth-child(4) .metric-item { border-right: none; }

    .metric-num {
      display: block;
      font-family: var(--font-serif);
      font-size: 2.75rem;
      font-weight: 600;
      color: var(--copper-bright);
      font-variant-numeric: tabular-nums;
      line-height: 1.2;
      margin-bottom: 0.5rem;
    }

    .metric-label {
      font-size: 0.9375rem;
      color: var(--dim-ink);
      letter-spacing: 0.02em;
    }

    .metric-line {
      display: block;
      width: 2rem;
      height: 2px;
      background: var(--copper-dark);
      margin: 0.75rem auto 0;
    }

    /* ========== FAQ ========== */
    .faq-section {
      background: var(--cream);
      padding: clamp(4.5rem, 8vw, 7rem) 0;
    }

    .faq-wrap {
      max-width: 960px;
      margin: 0 auto 2rem;
    }

    .custom-accordion {
      background: transparent;
      border-top: 1px solid var(--line);
    }

    .custom-accordion .accordion-item {
      border-bottom: 1px solid var(--line);
      background: transparent;
    }

    .custom-accordion .accordion-title {
      font-family: var(--font-sans);
      font-size: 1rem;
      font-weight: 600;
      color: var(--ink);
      background: transparent;
      border: none;
      padding: 1.375rem 2.5rem 1.375rem 0;
      position: relative;
      display: block;
      line-height: 1.5;
      transition: var(--transition);
    }
    .custom-accordion .accordion-title:hover {
      color: var(--copper-dark);
    }
    .custom-accordion .accordion-title::before,
    .custom-accordion .accordion-title::after {
      content: "";
      position: absolute;
      right: 0.375rem;
      top: 50%;
      width: 12px;
      height: 2px;
      background: var(--copper-dark);
      transition: all 0.24s ease-out;
    }
    .custom-accordion .accordion-title::after {
      transform: rotate(90deg);
    }
    .custom-accordion .accordion-item.is-active > .accordion-title::after {
      transform: rotate(0deg);
    }

    .custom-accordion .accordion-content {
      background: transparent;
      border: none;
      padding: 0 3rem 1.5rem 0;
      color: var(--limestone);
      font-size: 0.9375rem;
      line-height: 1.8;
    }
    .custom-accordion .accordion-content p:last-child {
      margin-bottom: 0;
    }

    /* ========== 联系 / CTA ========== */
    .contact-section {
      background: var(--ink);
      color: #fff;
      padding: clamp(4.5rem, 8vw, 7rem) 0;
    }

    .contact-info {
      padding-right: 2rem;
    }

    .contact-info h2 {
      font-family: var(--font-serif);
      font-size: clamp(1.75rem, 3.2vw, 2.375rem);
      font-weight: 600;
      line-height: 1.3;
      margin-bottom: 1rem;
      color: var(--cream);
    }

    .contact-info > p {
      font-size: 1rem;
      color: var(--dim-ink);
      line-height: 1.75;
      margin-bottom: 2rem;
      max-width: 30rem;
    }

    .contact-info ul {
      margin: 0;
    }
    .contact-info ul li {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.9375rem;
      color: var(--dim-ink);
      padding: 0.625rem 0;
    }
    .contact-info ul li i {
      color: var(--copper-bright);
      width: 1.25rem;
      text-align: center;
      flex-shrink: 0;
    }

    .contact-form {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-md);
      padding: 2.25rem;
    }

    .contact-form label {
      display: block;
      font-size: 0.875rem;
      font-weight: 500;
      color: #A0A0A4;
      margin-bottom: 1.25rem;
    }

    .contact-form input,
    .contact-form textarea {
      display: block;
      width: 100%;
      margin-top: 0.5rem;
      padding: 0.625rem 0;
      font-size: 1rem;
      color: #fff;
      background: transparent;
      border: none;
      border-bottom: 1px solid #4A4A4E;
      border-radius: 0;
      transition: var(--transition);
    }
    .contact-form input::placeholder,
    .contact-form textarea::placeholder {
      color: #9A9A9E;
    }
    .contact-form input:focus,
    .contact-form textarea:focus {
      border-bottom-color: var(--copper-bright);
      box-shadow: 0 2px 0 0 var(--copper-bright);
    }
    .contact-form textarea {
      resize: vertical;
      min-height: 80px;
    }
    .contact-form .btn {
      margin-top: 1rem;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: var(--footer-bg);
      border-top: 1px solid rgba(255,255,255,0.08);
      padding: 3.5rem 0 0;
      color: var(--dim-ink);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2.2fr 1.2fr 1.4fr 1.4fr;
      gap: 2.5rem;
      padding-bottom: 2.5rem;
    }

    .footer-brand .brand-logo {
      font-size: 1.25rem;
      display: inline-block;
      margin-bottom: 1rem;
    }

    .footer-brand p {
      font-size: 0.875rem;
      line-height: 1.7;
      color: #B8B5B0;
      max-width: 18rem;
      margin: 0;
    }

    .footer-col h4 {
      font-family: var(--font-serif);
      font-size: 0.9375rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 1rem;
      letter-spacing: 0.02em;
    }

    .footer-col ul li {
      margin-bottom: 0.5rem;
    }
    .footer-col ul li a {
      font-size: 0.875rem;
      color: #B8B5B0;
      transition: var(--transition);
    }
    .footer-col ul li a:hover {
      color: var(--copper-bright);
    }

    .footer-contact-list li {
      font-size: 0.875rem;
      color: #B8B5B0;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      line-height: 1.6;
    }
    .footer-contact-list li i {
      color: var(--copper-dark);
      width: 1rem;
      text-align: center;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.07);
      padding: 1.25rem 0;
      text-align: center;
      font-size: 0.8125rem;
      color: #6B6B6B;
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1023.98px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .main-nav {
        gap: 1.25rem;
      }
      .nav-list {
        gap: 1.125rem;
      }
    }

    @media (max-width: 639.98px) {
      .site-header {
        height: 64px;
      }
      .site-header .header-inner {
        height: 64px;
      }
      .nav-toggle {
        display: inline-block;
      }
      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--ink);
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem 1.25rem 2rem;
        gap: 1.5rem;
        display: none;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        box-shadow: 0 24px 48px rgba(0,0,0,0.35);
      }
      .main-nav.open {
        display: flex;
      }
      .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        width: 100%;
      }
      .nav-list a {
        font-size: 1rem;
        display: block;
        width: 100%;
        padding: 0.375rem 0;
      }
      .nav-list a::after { display: none; }
      .nav-list a.active {
        color: var(--copper-bright);
        border-left: 2px solid var(--copper-bright);
        padding-left: 0.75rem;
      }
      .nav-cta {
        margin-left: 0;
        width: 100%;
      }
      .nav-cta .btn {
        width: 100%;
      }

      .page-hero {
        min-height: 260px;
      }
      .page-hero-content {
        padding: 2.25rem 0;
      }

      .service-row {
        flex-wrap: wrap;
        gap: 0.875rem;
        padding: 1.375rem 1.125rem;
      }
      .service-num {
        font-size: 1.5rem;
        min-width: 2.75rem;
      }
      .service-arrow {
        display: none;
      }

      .process-step {
        padding: 1.5rem 1.25rem;
      }

      .metrics-grid {
        row-gap: 0;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255,255,255,0.07);
        padding: 1.25rem 0.5rem;
      }
      .metrics-grid .cell:nth-child(3) .metric-item,
      .metrics-grid .cell:nth-child(4) .metric-item {
        border-bottom: none;
      }

      .contact-form {
        padding: 1.5rem 1.25rem;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.75rem;
      }
      .footer-brand p {
        max-width: 100%;
      }
    }

    /* ========== Prefers Reduced Motion ========== */
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
      }
      .service-row:hover {
        transform: none;
      }
      .process-step:hover {
        transform: none;
      }
      .btn-primary:hover {
        transform: none;
      }
    }

    /* ========== Foundation 默认覆盖 ========== */
    .accordion-title { outline: none; }
    .accordion-title:focus { outline: none; }
    .accordion-content { border: none; }
    .button { margin: 0; }
    .grid-container { max-width: 80rem; }

/* roulang page: category3 */
:root {
  --primary-dark: #121214;
  --accent-old-brass: #B08D57;
  --accent-bright: #C9A96A;
  --bg-cream: #F7F5F2;
  --bg-paper: #FFFFFF;
  --text-secondary: #6B6B6B;
  --border-color: #E5E2DD;
  --dark-sub: #D5D2CE;
  --dark-label: #9A9A9E;
  --footer-bg: #0E0E10;
  --radius: 4px;
  --radius-btn: 2px;
  --transition: 200ms ease-out;
  --font-serif: "Noto Serif SC","Source Han Serif SC","Songti SC",SimSun,serif;
  --font-sans: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-cream);
  color: var(--primary-dark);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: inline-block; vertical-align: middle; }

a { color: var(--accent-old-brass); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-bright); }

ul { list-style: none; }

button { font-family: inherit; cursor: pointer; }

input, textarea { font-family: inherit; }

/* ===== Grid ===== */
.grid-container { max-width: 1280px; }
.grid-x { display: grid; grid-template-columns: repeat(12, 1fr); gap: 0; }
.cell { min-width: 0; }
.cell.shrink { grid-column: auto; }
.cell.auto { grid-column: auto / span 11; }
@media (min-width: 640px) {
  .cell.shrink { grid-column: auto; }
  .cell.auto { grid-column: auto / span 11; }
}
@media (min-width: 1024px) {
  .cell.auto { grid-column: auto / span 10; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
  line-height: 1.4;
  letter-spacing: 0.02em;
}
.btn i { margin-left: 8px; font-size: 13px; }

.btn-primary {
  background: var(--accent-bright);
  color: var(--primary-dark);
}
.btn-primary:hover {
  background: var(--accent-old-brass);
  color: #fff;
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.55);
  color: #fff;
}
.btn-outline:hover {
  border-color: var(--accent-bright);
  color: var(--accent-bright);
}

.btn-nav {
  padding: 10px 22px;
  font-size: 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--primary-dark);
  height: 76px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-serif);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand-logo:hover { color: var(--accent-bright); }

.main-nav {
  display: none;
  position: absolute;
  top: 76px;
  left: 0;
  right: 0;
  background: var(--primary-dark);
  padding: 20px;
  flex-direction: column;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.main-nav.open { display: flex; }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-list li a {
  display: inline-block;
  padding: 8px 0;
  color: #DAD8D4;
  font-size: 15px;
  font-weight: 500;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
  position: relative;
}
.nav-list li a:hover {
  color: var(--accent-bright);
  border-bottom-color: var(--accent-bright);
}
.nav-list li a.active {
  color: var(--accent-bright);
  border-bottom-color: var(--accent-bright);
}

.nav-cta { margin-top: 14px; }

.nav-toggle {
  background: none;
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 4px;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition);
}
.nav-toggle:hover { border-color: var(--accent-bright); }

@media (min-width: 1024px) {
  .site-header { height: 80px; }
  .main-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 0;
    padding: 0;
    background: transparent;
    border-bottom: none;
  }
  .nav-list {
    flex-direction: row;
    gap: 0;
    align-items: center;
  }
  .nav-list li a {
    padding: 8px 18px;
    color: #DAD8D4;
    font-size: 15px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    position: relative;
  }
  .nav-list li a::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: -2px;
    height: 2px;
    background: var(--accent-bright);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
  }
  .nav-list li a:hover::after,
  .nav-list li a.active::after {
    transform: scaleX(1);
  }
  .nav-list li a.active { color: var(--accent-bright); }
  .nav-cta { margin-top: 0; margin-left: 22px; }
  .nav-toggle { display: none; }
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  min-height: 320px;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(18,18,20,0.62);
}
.page-banner .grid-container { position: relative; z-index: 2; width: 100%; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--dark-label);
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}
.breadcrumb a { color: var(--dark-label); }
.breadcrumb a:hover { color: var(--accent-bright); }
.breadcrumb .sep { color: rgba(255,255,255,0.3); }

.page-banner h1 {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.2;
  text-wrap: balance;
}
.page-banner .lead {
  font-size: 16px;
  color: var(--dark-sub);
  max-width: 720px;
  line-height: 1.7;
}

@media (min-width: 640px) {
  .page-banner { min-height: 360px; }
  .page-banner h1 { font-size: 46px; }
}

/* ===== News List ===== */
.news-list-section {
  padding: clamp(72px, 8vw, 128px) 0;
  background: var(--bg-cream);
}

.section-head {
  margin-bottom: 48px;
}
.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--accent-old-brass);
  text-transform: none;
}
.section-head .eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--accent-old-brass);
}
.section-head h2 {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--primary-dark);
  margin-top: 12px;
  line-height: 1.3;
}
.section-head .sub {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 10px;
  max-width: 620px;
}

.news-list { display: flex; flex-direction: column; }

.news-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition);
  text-align: left;
  width: 100%;
}
.news-item:first-child { padding-top: 0; }
.news-item:last-child { border-bottom: none; padding-bottom: 0; }

.news-item:hover .news-thumb img { transform: scale(1.03); }
.news-item:hover .news-arrow i { transform: translateX(4px); }

.news-thumb {
  flex: 0 0 120px;
  width: 120px;
  height: 84px;
  border-radius: var(--radius);
  overflow: hidden;
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease-out; }

.news-content {
  flex: 1;
  min-width: 0;
}
.news-cat {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-old-brass);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.news-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-dark);
  line-height: 1.4;
  margin-bottom: 6px;
  transition: color var(--transition);
}
.news-title a { color: inherit; }
.news-title a:hover { color: var(--accent-old-brass); }

.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: block;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--dark-label);
}
.news-arrow {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.news-arrow i { transition: transform var(--transition); }

@media (min-width: 640px) {
  .news-thumb { flex-basis: 140px; width: 140px; height: 96px; }
  .news-title { font-size: 19px; }
}

/* ===== Tags ===== */
.tags-section {
  padding: clamp(60px, 7vw, 100px) 0;
  background: var(--bg-paper);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.tag-list { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-cream);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  transition: all var(--transition);
}
.tag-pill i { font-size: 12px; color: var(--accent-old-brass); }
.tag-pill:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* ===== Value Section ===== */
.value-section {
  padding: clamp(72px, 8vw, 128px) 0;
  background: var(--primary-dark);
  color: var(--dark-sub);
}

.value-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 48px;
}

.value-card {
  padding: 32px 28px;
  border-left: 2px solid var(--accent-old-brass);
  background: rgba(255,255,255,0.03);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: background var(--transition);
}
.value-card:hover { background: rgba(255,255,255,0.06); }

.value-card .value-icon {
  font-size: 22px;
  color: var(--accent-bright);
  margin-bottom: 16px;
}
.value-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 10px;
}
.value-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--dark-sub);
}

@media (min-width: 640px) {
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .value-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ===== FAQ ===== */
.faq-section {
  padding: clamp(72px, 8vw, 128px) 0;
  background: var(--bg-cream);
}

.faq-wrap { max-width: 960px; margin: 0 auto; margin-top: 40px; }

.accordion-item {
  border-bottom: 1px solid var(--border-color);
}

.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  transition: color var(--transition);
  background: transparent;
}
.accordion-title:hover { color: var(--accent-old-brass); }

.accordion-title .acc-icon {
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  position: relative;
}
.accordion-title .acc-icon::before,
.accordion-title .acc-icon::after {
  content: "";
  position: absolute;
  background: var(--accent-old-brass);
  transition: all 0.3s ease-out;
}
.accordion-title .acc-icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 4px;
  transform: translateY(-50%);
}
.accordion-title .acc-icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
}

.accordion-item.is-active .accordion-title .acc-icon::after { transform: translateX(-50%) translateY(-50%) scaleY(0); }

.accordion-content {
  display: none;
  padding: 0 4px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}
.accordion-item.is-active .accordion-content { display: block; }

/* ===== CTA ===== */
.cta-section {
  padding: clamp(80px, 9vw, 140px) 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  position: relative;
  color: #fff;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(18,18,20,0.72);
}
.cta-section .grid-container { position: relative; z-index: 2; }

.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.cta-inner h2 {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 16px;
  color: var(--dark-sub);
  line-height: 1.8;
  margin-bottom: 32px;
}
.cta-inner .cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  padding: 64px 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 44px;
}

.footer-brand .brand-logo { font-size: 20px; }
.footer-brand p {
  font-size: 14px;
  color: var(--dark-label);
  line-height: 1.7;
  margin-top: 12px;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-col ul li { margin-bottom: 8px; }

.footer-col ul li a {
  font-size: 14px;
  color: #B8B5B0;
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent-bright); }

.footer-contact-list li {
  font-size: 14px;
  color: var(--dark-label);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.footer-contact-list i { color: var(--accent-old-brass); width: 16px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #6B6B6B;
}

@media (min-width: 640px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; }
}

/* ===== Focus states ===== */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
  .news-thumb img,
  .news-arrow i,
  .btn { transform: none !important; }
}

/* roulang page: category4 */
:root {
            --color-primary: #121214;
            --color-copper-dark: #B08D57;
            --color-copper-light: #C9A96A;
            --color-cream: #F7F5F2;
            --color-paper: #FFFFFF;
            --color-text-secondary: #6B6B6B;
            --color-border: #E5E2DD;
            --color-dark-text: #D5D2CE;
            --color-dark-label: #9A9A9E;
            --color-footer-bg: #0E0E10;
            --radius-sm: 2px;
            --radius-md: 4px;
            --shadow-card: 0 12px 32px rgba(18, 18, 20, 0.08);
            --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', 'SimSun', serif;
            --font-body: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 160ms ease-out;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-body);
            font-weight: 400;
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-primary);
            background: var(--color-cream);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        a {
            color: var(--color-copper-dark);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--color-copper-light);
        }

        ul,
        ol {
            padding: 0;
            margin: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            color: var(--color-primary);
            margin: 0 0 12px;
            line-height: 1.35;
            text-wrap: balance;
        }

        p {
            margin: 0 0 16px;
        }

        .grid-container {
            max-width: 1280px;
        }

        .section {
            padding: clamp(72px, 8vw, 128px) 0;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.08em;
            color: var(--color-copper-dark);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            width: 32px;
            height: 1px;
            background: var(--color-copper-light);
            flex: none;
        }

        .section-title {
            font-size: 36px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 720px;
            line-height: 1.75;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            text-decoration: none;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1;
            background: var(--color-copper-light);
            color: var(--color-primary);
        }

        .btn:hover {
            background: var(--color-copper-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-copper-light);
            outline-offset: 3px;
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.4);
            color: #FFFFFF;
        }

        .btn-outline:hover {
            background: transparent;
            border-color: var(--color-copper-light);
            color: var(--color-copper-light);
            transform: translateY(-1px);
        }

        .btn-nav {
            padding: 10px 22px;
            font-size: 14px;
        }

        /* ===================== Header / Nav ===================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            height: 76px;
        }

        .header-inner {
            height: 76px;
        }

        .brand-logo {
            font-family: var(--font-heading);
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            text-decoration: none;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--color-copper-light);
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            gap: 20px;
        }

        .nav-list {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0;
            padding: 0;
        }

        .nav-list li {
            margin: 0;
        }

        .nav-list a {
            position: relative;
            display: block;
            font-size: 15px;
            font-weight: 500;
            color: #DAD8D4;
            text-decoration: none;
            padding: 8px 0;
            transition: color var(--transition);
        }

        .nav-list a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--color-copper-light);
            transition: width var(--transition);
        }

        .nav-list a:hover {
            color: var(--color-copper-light);
        }

        .nav-list a:hover::after,
        .nav-list a.active::after {
            width: 100%;
        }

        .nav-list a.active {
            color: var(--color-copper-light);
        }

        .nav-cta {
            margin-left: 4px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #FFFFFF;
            font-size: 22px;
            cursor: pointer;
            padding: 8px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: color var(--transition);
        }

        .nav-toggle:hover {
            color: var(--color-copper-light);
        }

        /* ===================== Page Hero ===================== */
        .page-hero {
            position: relative;
            min-height: 320px;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            display: flex;
            align-items: center;
            color: #FFFFFF;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(18, 18, 20, 0.55);
        }

        .page-hero .grid-container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            font-size: 14px;
            color: var(--color-dark-text);
            margin-bottom: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        .breadcrumb a {
            color: #FFFFFF;
            text-decoration: none;
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--color-copper-light);
        }

        .breadcrumb .sep {
            color: var(--color-dark-label);
        }

        .breadcrumb .current {
            color: var(--color-copper-light);
        }

        .page-hero h1 {
            font-family: var(--font-heading);
            font-size: 46px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--color-dark-text);
            max-width: 680px;
            line-height: 1.75;
            margin: 0;
        }

        /* ===================== FAQ Section ===================== */
        .faq-section {
            background: var(--color-paper);
        }

        .help-sidebar {
            position: sticky;
            top: 110px;
        }

        .help-sidebar img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin: 28px 0 0;
        }

        .faq-accordion {
            margin: 0;
            background: transparent;
        }

        .faq-accordion .accordion-item {
            list-style: none;
            border-bottom: 1px solid var(--color-border);
            background: transparent;
        }

        .faq-accordion .accordion-item:first-child {
            border-top: 1px solid var(--color-border);
        }

        .faq-accordion .accordion-item.is-active {
            border-bottom-color: transparent;
        }

        .faq-accordion .accordion-title {
            position: relative;
            display: block;
            background: transparent !important;
            border: none !important;
            font-family: var(--font-body);
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            padding: 22px 52px 22px 0;
            line-height: 1.5;
            transition: color var(--transition);
        }

        .faq-accordion .accordion-title:hover,
        .faq-accordion .accordion-item.is-active .accordion-title {
            color: var(--color-copper-dark);
            background: transparent !important;
        }

        .faq-accordion .accordion-title::before,
        .faq-accordion .accordion-title::after {
            content: none !important;
            display: none !important;
        }

        .faq-accordion .accordion-icon {
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 400;
            font-style: normal;
            color: var(--color-copper-light);
            border: 1px solid var(--color-border);
            border-radius: 50%;
            transition: transform var(--transition), background var(--transition), color var(--transition);
        }

        .faq-accordion .accordion-item.is-active .accordion-icon {
            transform: translateY(-50%) rotate(45deg);
            background: var(--color-copper-light);
            color: var(--color-primary);
            border-color: var(--color-copper-light);
        }

        .faq-accordion .accordion-content {
            background: transparent !important;
            border: none !important;
            color: var(--color-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            padding: 0 48px 26px 0 !important;
        }

        .faq-accordion .accordion-content p {
            margin-bottom: 0;
        }

        /* ===================== Support Channel ===================== */
        .support-channel-section {
            background: var(--color-cream);
        }

        .support-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .support-card {
            background: var(--color-paper);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 36px 32px;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }

        .support-card:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
            border-color: rgba(201, 169, 106, 0.4);
        }

        .support-card .icon-wrap {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(201, 169, 106, 0.12);
            color: var(--color-copper-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            transition: background var(--transition), color var(--transition);
        }

        .support-card:hover .icon-wrap {
            background: var(--color-copper-light);
            color: var(--color-primary);
        }

        .support-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .support-card p {
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ===================== Steps ===================== */
        .steps-section {
            background: var(--color-paper);
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            position: relative;
            background: var(--color-cream);
            border: 1px solid var(--color-border);
            border-top: 2px solid var(--color-copper-light);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .step-item:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .step-num {
            font-family: var(--font-heading);
            font-size: 42px;
            font-weight: 700;
            color: rgba(201, 169, 106, 0.35);
            line-height: 1;
            margin-bottom: 18px;
            font-variant-numeric: tabular-nums;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===================== CTA / Contact ===================== */
        .cta-section {
            background: var(--color-primary);
            padding: clamp(72px, 8vw, 120px) 0;
        }

        .cta-section .cta-title {
            font-family: var(--font-heading);
            font-size: 38px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .cta-section .cta-desc {
            font-size: 16px;
            color: var(--color-dark-text);
            line-height: 1.8;
            max-width: 480px;
        }

        .cta-info-list {
            list-style: none;
            margin: 28px 0 0;
            padding: 0;
        }

        .cta-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-dark-text);
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .cta-info-list li:last-child {
            border-bottom: none;
        }

        .cta-info-list i {
            color: var(--color-copper-light);
            font-size: 16px;
            margin-top: 5px;
            flex: none;
        }

        .cta-form-wrap {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 36px 32px;
        }

        .form-group {
            margin-bottom: 22px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            color: #A0A0A4;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            background: transparent;
            border: none;
            border-bottom: 1px solid #4A4A4E;
            border-radius: 0;
            font-size: 16px;
            font-family: var(--font-body);
            color: #FFFFFF;
            padding: 12px 0;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .form-control::placeholder {
            color: var(--color-dark-label);
        }

        .form-control:focus {
            outline: none;
            border-bottom-color: var(--color-copper-light);
            box-shadow: 0 2px 0 rgba(201, 169, 106, 0.4);
            background: transparent;
        }

        textarea.form-control {
            resize: vertical;
            min-height: 80px;
        }

        .form-success,
        .form-error {
            font-size: 14px;
            margin-top: 12px;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            line-height: 1.5;
        }

        .form-success {
            color: #81C784;
            background: rgba(129, 199, 132, 0.1);
            border-left: 3px solid #81C784;
        }

        .form-error {
            color: #E57373;
            background: rgba(229, 115, 115, 0.1);
            border-left: 3px solid #E57373;
        }

        .form-submit {
            width: 100%;
            margin-top: 8px;
        }

        /* ===================== Footer ===================== */
        .site-footer {
            background: var(--color-footer-bg);
            color: #B8B5B0;
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .brand-logo {
            color: #FFFFFF;
            font-size: 24px;
        }

        .footer-brand p {
            font-size: 14px;
            color: #9A9A9E;
            line-height: 1.7;
            margin-top: 16px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 18px;
            font-family: var(--font-body);
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col li {
            margin-bottom: 10px;
            font-size: 14px;
            color: #B8B5B0;
        }

        .footer-col a {
            font-size: 14px;
            color: #B8B5B0;
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--color-copper-light);
        }

        .footer-contact-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
        }

        .footer-contact-list i {
            color: var(--color-copper-light);
            margin-top: 5px;
            font-size: 14px;
            width: 16px;
            flex: none;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: #6B6B6B;
        }

        /* ===================== Focus / Motion ===================== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--color-copper-light);
            outline-offset: 2px;
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }

            html {
                scroll-behavior: auto;
            }

            .support-card:hover,
            .step-item:hover,
            .btn:hover {
                transform: none;
            }
        }

        /* ===================== Responsive ===================== */
        @media (max-width: 1023px) {
            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: var(--color-primary);
                flex-direction: column;
                align-items: stretch;
                justify-content: flex-start;
                gap: 0;
                padding: 20px 24px 24px;
                display: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                max-height: calc(100vh - 76px);
                overflow-y: auto;
            }

            .main-nav.open {
                display: flex;
            }

            .nav-list {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                width: 100%;
            }

            .nav-list a {
                display: block;
                padding: 12px 0;
                width: 100%;
                font-size: 16px;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 16px;
            }

            .nav-cta .btn {
                width: 100%;
                padding: 14px 22px;
            }

            .nav-toggle {
                display: flex;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

            .support-grid,
            .steps {
                grid-template-columns: 1fr 1fr;
            }

            .help-sidebar {
                position: static;
                margin-bottom: 32px;
            }

            .help-sidebar img {
                max-width: 420px;
            }
        }

        @media (max-width: 639px) {
            .site-header {
                height: 68px;
            }

            .header-inner {
                height: 68px;
            }

            .main-nav {
                top: 68px;
            }

            .brand-logo {
                font-size: 19px;
            }

            .page-hero {
                min-height: 280px;
            }

            .page-hero h1 {
                font-size: 34px;
            }

            .hero-desc {
                font-size: 16px;
            }

            .section-title {
                font-size: 28px;
            }

            .section-subtitle {
                font-size: 15px;
            }

            .support-grid,
            .steps {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .cta-form-wrap {
                padding: 28px 20px;
                margin-top: 32px;
            }

            .cta-title {
                font-size: 30px;
            }

            .faq-accordion .accordion-content {
                padding: 0 32px 22px 0 !important;
            }

            .faq-accordion .accordion-title {
                font-size: 15px;
                padding-right: 44px;
            }
        }

/* roulang page: category5 */
:root {
        --ink-black: #121214;
        --copper-dark: #B08D57;
        --copper-light: #C9A96A;
        --cream: #F7F5F2;
        --paper: #FFFFFF;
        --gray-text: #6B6B6B;
        --line: #E5E2DD;
        --dark-text: #D5D2CE;
        --dark-label: #9A9A9E;
        --footer-bg: #0E0E10;
        --radius: 4px;
        --radius-sm: 2px;
        --shadow: 0 12px 32px rgba(18, 18, 20, 0.08);
        --transition: all 0.2s ease-out;
        --serif-stack: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
        --sans-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--sans-stack);
        background: var(--cream);
        color: var(--ink-black);
        line-height: 1.75;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }

    ul {
        list-style: none;
    }

    input,
    textarea,
    select,
    button {
        font-family: var(--sans-stack);
        font-size: 16px;
        outline: none;
    }

    .grid-container {
        max-width: 1280px;
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: var(--ink-black);
        height: 76px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .site-header .grid-container {
        height: 100%;
    }

    .header-inner {
        height: 100%;
    }

    .brand-logo {
        font-family: var(--serif-stack);
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        letter-spacing: 0.02em;
        white-space: nowrap;
    }

    .brand-logo:hover {
        color: var(--copper-light);
    }

    .main-nav {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 20px;
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .nav-list a {
        font-size: 15px;
        font-weight: 500;
        color: #DAD8D4;
        padding: 8px 14px;
        position: relative;
        display: inline-block;
    }

    .nav-list a::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 14px;
        right: 14px;
        height: 2px;
        background: var(--copper-light);
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.2s ease-out;
    }

    .nav-list a:hover {
        color: var(--copper-light);
    }

    .nav-list a:hover::after,
    .nav-list a.active::after {
        transform: scaleX(1);
    }

    .nav-list a.active {
        color: var(--copper-light);
    }

    .nav-cta {
        display: flex;
        align-items: center;
    }

    .btn {
        display: inline-block;
        font-size: 15px;
        font-weight: 600;
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        border: 1px solid transparent;
        cursor: pointer;
        transition: var(--transition);
        line-height: 1.4;
        text-align: center;
        background: transparent;
    }

    .btn-primary {
        background: var(--copper-light);
        color: var(--ink-black);
    }

    .btn-primary:hover {
        background: var(--copper-dark);
        color: #fff;
        transform: translateY(-1px);
    }

    .btn-nav {
        padding: 10px 24px;
        font-size: 14px;
        background: var(--copper-light);
        color: var(--ink-black);
        border-radius: var(--radius-sm);
    }

    .btn-nav:hover {
        background: var(--copper-dark);
        color: #fff;
        transform: translateY(-1px);
    }

    .btn-outline {
        border-color: #B8B5B0;
        color: #DAD8D4;
        background: transparent;
    }

    .btn-outline:hover {
        border-color: var(--copper-light);
        color: var(--copper-light);
    }

    .btn-outline-light {
        border-color: rgba(255, 255, 255, 0.35);
        color: #fff;
        background: transparent;
    }

    .btn-outline-light:hover {
        border-color: var(--copper-light);
        color: var(--copper-light);
    }

    .nav-toggle {
        display: none;
        background: transparent;
        border: none;
        color: #fff;
        font-size: 22px;
        cursor: pointer;
        padding: 8px;
        line-height: 1;
    }

    .sitemap-breadcrumb {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 14px;
        color: var(--gray-text);
    }

    .sitemap-breadcrumb a {
        color: var(--gray-text);
    }

    .sitemap-breadcrumb a:hover {
        color: var(--copper-dark);
    }

    .sitemap-breadcrumb .sep {
        color: #B8B5B0;
    }

    .section-padding {
        padding: clamp(72px, 8vw, 128px) 0;
    }

    .section-head {
        text-align: center;
        margin-bottom: 56px;
        max-width: 760px;
        margin-left: auto;
        margin-right: auto;
    }

    .section-head h2 {
        font-family: var(--serif-stack);
        font-size: clamp(32px, 4vw, 42px);
        font-weight: 600;
        color: var(--ink-black);
        margin-bottom: 16px;
        line-height: 1.3;
        text-wrap: balance;
    }

    .section-head p {
        font-size: 18px;
        color: var(--gray-text);
    }

    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        font-size: 13px;
        font-weight: 500;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--copper-dark);
        margin-bottom: 20px;
    }

    .section-tag::before {
        content: "";
        width: 32px;
        height: 1px;
        background: var(--copper-light);
    }

    .section-tag.light {
        color: var(--copper-light);
    }

    .section-tag.light::before {
        background: var(--copper-light);
    }

    .dark-section {
        background: var(--ink-black);
        color: var(--dark-text);
    }

    .dark-section .section-head h2 {
        color: #fff;
    }

    .dark-section .section-head p {
        color: var(--dark-label);
    }

    .page-banner {
        position: relative;
        min-height: 320px;
        display: flex;
        align-items: center;
        background-size: cover;
        background-position: center;
        color: #fff;
    }

    .page-banner-overlay {
        position: absolute;
        inset: 0;
        background: rgba(18, 18, 20, 0.62);
    }

    .page-banner .grid-container {
        position: relative;
        z-index: 2;
        width: 100%;
    }

    .page-breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--dark-label);
        margin-bottom: 20px;
    }

    .page-breadcrumb a {
        color: var(--dark-label);
    }

    .page-breadcrumb a:hover {
        color: var(--copper-light);
    }

    .page-breadcrumb .sep {
        color: rgba(255, 255, 255, 0.4);
    }

    .page-banner h1 {
        font-family: var(--serif-stack);
        font-size: clamp(36px, 5vw, 52px);
        font-weight: 600;
        margin-bottom: 14px;
        line-height: 1.25;
        color: #fff;
    }

    .page-banner-desc {
        font-size: 18px;
        color: var(--dark-text);
        max-width: 600px;
    }

    .coop-intro {
        background: var(--paper);
    }

    .coop-intro-img {
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        width: 100%;
        object-fit: cover;
    }

    .coop-intro .section-tag {
        margin-bottom: 16px;
    }

    .coop-intro h2 {
        font-family: var(--serif-stack);
        font-size: clamp(28px, 3.5vw, 38px);
        font-weight: 600;
        line-height: 1.35;
        margin-bottom: 20px;
        color: var(--ink-black);
    }

    .coop-intro .lead-text {
        font-size: 17px;
        color: var(--gray-text);
        margin-bottom: 28px;
        line-height: 1.85;
    }

    .serif-quote {
        border-left: 3px solid var(--copper-light);
        padding: 16px 22px;
        font-family: var(--serif-stack);
        font-size: 18px;
        color: var(--ink-black);
        background: var(--cream);
        border-radius: 0 var(--radius) var(--radius) 0;
        margin-bottom: 30px;
        line-height: 1.7;
    }

    .coop-advantages {
        background: var(--ink-black);
    }

    .advantage-card {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: var(--radius);
        padding: 32px 28px;
        height: 100%;
        transition: var(--transition);
    }

    .advantage-card:hover {
        background: rgba(255, 255, 255, 0.07);
        border-color: rgba(201, 169, 106, 0.4);
        transform: translateY(-4px);
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
    }

    .advantage-card i {
        font-size: 28px;
        color: var(--copper-light);
        margin-bottom: 20px;
        display: block;
    }

    .advantage-card h3 {
        font-family: var(--serif-stack);
        font-size: 20px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 12px;
    }

    .advantage-card p {
        font-size: 14px;
        color: var(--dark-label);
        line-height: 1.7;
    }

    .coop-process {
        background: var(--cream);
    }

    .process-item {
        text-align: center;
        padding: 32px 24px;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--paper);
        height: 100%;
        transition: var(--transition);
    }

    .process-item:hover {
        border-color: var(--copper-light);
        box-shadow: var(--shadow);
    }

    .process-num {
        font-family: var(--serif-stack);
        font-size: 38px;
        font-weight: 600;
        color: var(--copper-light);
        display: block;
        margin-bottom: 16px;
        font-variant-numeric: tabular-nums;
    }

    .process-item h3 {
        font-family: var(--serif-stack);
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 12px;
        color: var(--ink-black);
    }

    .process-item p {
        font-size: 14px;
        color: var(--gray-text);
        line-height: 1.7;
    }

    .scenario-card {
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        padding: 36px 28px;
        height: 100%;
        transition: var(--transition);
    }

    .scenario-card:hover {
        border-color: var(--copper-light);
        box-shadow: var(--shadow);
    }

    .scenario-card i {
        font-size: 24px;
        color: var(--copper-dark);
        margin-bottom: 20px;
        display: block;
    }

    .scenario-card h3 {
        font-family: var(--serif-stack);
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 14px;
        color: var(--ink-black);
    }

    .scenario-card p {
        font-size: 14px;
        color: var(--gray-text);
        line-height: 1.75;
    }

    .contact-section {
        background: var(--ink-black);
    }

    .contact-section .section-tag {
        margin-bottom: 16px;
    }

    .contact-section h2 {
        font-family: var(--serif-stack);
        font-size: clamp(28px, 3.5vw, 38px);
        font-weight: 600;
        color: #fff;
        margin-bottom: 20px;
        line-height: 1.3;
    }

    .contact-section .desc {
        font-size: 16px;
        color: var(--dark-label);
        margin-bottom: 30px;
        max-width: 440px;
    }

    .contact-info-list li {
        display: flex;
        align-items: flex-start;
        gap: 14px;
        font-size: 15px;
        color: var(--dark-text);
        padding: 16px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .contact-info-list li:last-child {
        border-bottom: none;
    }

    .contact-info-list i {
        color: var(--copper-light);
        font-size: 18px;
        margin-top: 4px;
        width: 22px;
        text-align: center;
    }

    .contact-form {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: var(--radius);
        padding: 40px;
    }

    .contact-form label {
        font-size: 14px;
        font-weight: 500;
        color: #A0A0A4;
        margin-bottom: 8px;
        display: block;
    }

    .contact-form input,
    .contact-form textarea {
        width: 100%;
        background: transparent;
        border: none;
        border-bottom: 1px solid #4A4A4E;
        color: #fff;
        font-size: 16px;
        padding: 10px 2px;
        margin-bottom: 28px;
        transition: border-color 0.2s ease-out;
        border-radius: 0;
    }

    .contact-form input::placeholder,
    .contact-form textarea::placeholder {
        color: var(--dark-label);
    }

    .contact-form input:focus,
    .contact-form textarea:focus {
        border-bottom-color: var(--copper-light);
        box-shadow: 0 1px 0 var(--copper-light);
    }

    .contact-form textarea {
        min-height: 120px;
        resize: vertical;
    }

    .contact-form .btn {
        margin-top: 8px;
        width: 100%;
    }

    .faq-section {
        background: var(--paper);
    }

    .faq-container {
        max-width: 900px;
        margin: 0 auto;
    }

    .accordion {
        background: transparent;
        border: none;
        margin: 0;
    }

    .accordion-item {
        background: transparent;
        border: none;
        border-bottom: 1px solid var(--line);
        margin: 0;
    }

    .accordion-item:first-child {
        border-top: 1px solid var(--line);
    }

    .accordion-title {
        font-size: 16px;
        font-weight: 600;
        color: var(--ink-black);
        padding: 22px 20px 22px 0;
        border: none;
        border-radius: 0;
        background: transparent !important;
        line-height: 1.5;
        position: relative;
    }

    .accordion-title:hover {
        color: var(--copper-dark);
        background: transparent;
    }

    .accordion-title::after {
        content: "+";
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        font-size: 22px;
        font-weight: 300;
        color: var(--copper-dark);
        transition: transform 0.2s ease-out;
    }

    .accordion-item.is-active .accordion-title::after {
        content: "×";
        transform: translateY(-50%) rotate(0deg);
    }

    .accordion-content {
        background: transparent;
        border: none;
        padding: 0 20px 26px 0;
        color: var(--gray-text);
        font-size: 15px;
        line-height: 1.8;
    }

    .accordion-content p {
        margin-bottom: 8px;
    }

    .cta-section {
        padding: clamp(72px, 8vw, 120px) 0;
        background: var(--cream);
    }

    .cta-box {
        background: var(--ink-black);
        border-radius: 8px;
        padding: 72px 48px;
        text-align: center;
        position: relative;
        overflow: hidden;
        background-image: url("/assets/images/backpic/back-1.png");
        background-size: cover;
        background-position: center;
    }

    .cta-box::before {
        content: "";
        position: absolute;
        inset: 0;
        background: rgba(18, 18, 20, 0.75);
    }

    .cta-box>* {
        position: relative;
        z-index: 2;
    }

    .cta-box h2 {
        font-family: var(--serif-stack);
        font-size: clamp(28px, 4vw, 38px);
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
    }

    .cta-box p {
        font-size: 17px;
        color: var(--dark-text);
        margin-bottom: 32px;
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }

    .cta-box .btn {
        margin: 0 8px;
    }

    .site-footer {
        background: var(--footer-bg);
        padding: 64px 0 0;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 48px;
        padding-bottom: 48px;
    }

    .footer-brand .brand-logo {
        font-size: 22px;
        color: #fff;
        margin-bottom: 16px;
        display: inline-block;
    }

    .footer-brand p {
        font-size: 14px;
        color: var(--dark-label);
        line-height: 1.8;
        max-width: 320px;
    }

    .footer-col h4 {
        font-family: var(--serif-stack);
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 20px;
    }

    .footer-col ul li {
        margin-bottom: 12px;
    }

    .footer-col ul a {
        font-size: 14px;
        color: #B8B5B0;
    }

    .footer-col ul a:hover {
        color: var(--copper-light);
    }

    .footer-contact-list li {
        font-size: 14px;
        color: #B8B5B0;
        display: flex;
        gap: 12px;
        margin-bottom: 12px;
        align-items: flex-start;
    }

    .footer-contact-list i {
        color: var(--copper-dark);
        margin-top: 3px;
        width: 16px;
        text-align: center;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 20px 0;
        text-align: center;
        font-size: 13px;
        color: #6B6B6B;
    }

    .footer-bottom p {
        margin: 0;
    }

    .empty-state {
        text-align: center;
        padding: 48px 24px;
        color: var(--dark-label);
        font-size: 15px;
    }

    .empty-state i {
        font-size: 32px;
        color: var(--copper-dark);
        display: block;
        margin-bottom: 16px;
    }

    ::selection {
        background: var(--copper-light);
        color: var(--ink-black);
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
        outline: 2px solid var(--copper-light);
        outline-offset: 2px;
    }

    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            animation: none !important;
            transition: none !important;
        }
        html {
            scroll-behavior: auto;
        }
    }

    @media (max-width: 1023.98px) {
        .main-nav {
            position: fixed;
            top: 76px;
            left: 0;
            right: 0;
            background: var(--ink-black);
            flex-direction: column;
            align-items: flex-start;
            padding: 24px;
            gap: 20px;
            display: none;
            z-index: 99;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        .main-nav.is-open {
            display: flex;
        }

        .nav-list {
            flex-direction: column;
            align-items: flex-start;
            gap: 14px;
            width: 100%;
        }

        .nav-list a {
            font-size: 16px;
            padding: 8px 0;
            display: block;
            width: 100%;
        }

        .nav-list a::after {
            display: none;
        }

        .nav-list a.active {
            border-left: 2px solid var(--copper-light);
            padding-left: 16px;
        }

        .nav-cta {
            width: 100%;
            margin-top: 8px;
        }

        .nav-cta .btn-nav {
            width: 100%;
            text-align: center;
        }

        .nav-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }
    }

    @media (max-width: 639.98px) {
        .site-header {
            height: 68px;
        }

        .main-nav {
            top: 68px;
        }

        .brand-logo {
            font-size: 19px;
        }

        .section-padding {
            padding: 56px 0;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .page-banner {
            min-height: 260px;
        }

        .page-banner h1 {
            font-size: 34px;
        }

        .contact-form {
            padding: 24px;
        }

        .cta-box {
            padding: 48px 24px;
        }

        .cta-box .btn {
            display: block;
            width: 100%;
            margin: 12px 0;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }

        .footer-brand p {
            max-width: 100%;
        }

        .coop-intro h2,
        .contact-section h2 {
            font-size: 26px;
        }
    }