/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --color-brand: #1E4D3B;
  --color-brand-dark: #163829;
  --color-accent: #C9A876;
  --color-accent-dark: #B08B5A;
  --color-bg: #FAF8F5;
  --color-surface: #FFFFFF;
  --color-ink: #17211C;
  --color-muted: #6F7A72;
  --color-line: #E7E1D8;
  --color-error: #B4545A;
  --color-success: #2E6E4E;
  --shadow-sm: 0 2px 8px rgba(23,33,28,0.06);
  --shadow-lg: 0 12px 32px rgba(23,33,28,0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;
  --font-head: "Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-body: "Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --container: 1200px;
  --space-section: 96px;
  --transition: 0.3s cubic-bezier(0.22,1,0.36,1);
}
/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }
input:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
::selection { background: var(--color-accent); color: var(--color-brand); }

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
}

/* ===== 板块 ===== */
.section { padding: var(--space-section) 0; position: relative; }
.section-head {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 48px;
}
.section-index {
  font-family: var(--font-head);
  font-size: 1rem;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.6;
  min-width: 44px;
}
.section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
}
.section-desc {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 0.95rem;
  max-width: 56ch;
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-head { flex-direction: column; gap: 8px; margin-bottom: 32px; }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.22,1,0.36,1);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-brand);
  color: #F5F1E8;
  border: 1px solid var(--color-brand);
}
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-brand);
  transform: translateY(-1px);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: transparent;
  color: var(--color-brand);
  border: 1px solid var(--color-line);
}
.btn-secondary:hover {
  background: rgba(30,77,59,0.04);
  border-color: var(--color-brand);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-ink);
  border: 1px solid var(--color-accent);
}
.btn-accent:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); color: var(--color-ink); transform: translateY(-1px); }
.btn-outline-light {
  background: transparent;
  color: #F5F1E8;
  border: 1px solid rgba(245,241,232,0.5);
}
.btn-outline-light:hover { border-color: var(--color-accent); color: var(--color-accent); background: rgba(201,168,118,0.08); }
.btn-lg { padding: 16px 40px; font-size: 1rem; }

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: transparent;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}
.site-header.scrolled {
  background: var(--color-bg);
  box-shadow: 0 1px 0 var(--color-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 34px;
  height: 34px;
  background: var(--color-brand);
  color: var(--color-accent);
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 19px;
  line-height: 1;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.01em;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  font-size: 0.95rem;
  color: var(--color-ink);
  padding: 6px 2px;
  position: relative;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 8px;
  background: var(--color-accent);
  border-radius: 2px;
  opacity: 0;
  transition: opacity 0.3s ease, width 0.3s ease;
}
.main-nav a:hover { color: var(--color-brand); }
.main-nav a.active { color: var(--color-brand); font-weight: 600; }
.main-nav a.active::after { width: 100%; opacity: 1; }
.header-cta { flex-shrink: 0; padding: 10px 24px; font-size: 0.9rem; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 8px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  transition: background 0.3s ease;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.3s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { transform: rotate(45deg) translateY(6px); }
.nav-toggle.open span::after { transform: rotate(-45deg) translateY(-6px); }

/* 移动端抽屉 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: var(--color-brand);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
  display: flex;
  flex-direction: column;
  padding: 80px 32px 32px;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  font-size: 1.5rem;
  color: #F5F1E8;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mobile-menu-close:hover { background: rgba(255,255,255,0.1); }
.mobile-menu nav ul { flex-direction: column; align-items: flex-start; gap: 8px; }
.mobile-menu nav li {
  width: 100%;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.mobile-menu nav a {
  display: block;
  padding: 18px 8px;
  font-family: var(--font-head);
  font-size: 1.4rem;
  color: #F5F1E8;
}
.mobile-menu nav a:hover { color: var(--color-accent); }
.mobile-menu nav a.active { color: var(--color-accent); }
.mobile-menu .mobile-cta {
  margin-top: 32px;
  background: var(--color-accent);
  color: var(--color-ink);
}
@media (max-width: 900px) {
  .main-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding-top: 180px;
  padding-bottom: 108px;
  background: var(--color-bg);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-overline {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
}
.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-ink);
  margin-bottom: 24px;
  letter-spacing: 0.01em;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--color-muted);
  max-width: 32ch;
  line-height: 1.9;
  margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-figure {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  background: var(--color-surface);
}
.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.hero-figure:hover img { transform: scale(1.03); }
.hero-watermark {
  position: absolute;
  right: -30px;
  bottom: -40px;
  font-family: var(--font-head);
  font-size: clamp(12rem, 22vw, 22rem);
  font-weight: 700;
  color: rgba(30,77,59,0.045);
  line-height: 1;
  z-index: 1;
  user-select: none;
  animation: watermarkIn 1s ease both;
}
@keyframes watermarkIn {
  from { opacity: 0; transform: rotate(8deg) translateY(20px); }
  to { opacity: 1; transform: rotate(8deg) translateY(0); }
}
.hero h1 .line {
  display: block;
  overflow: hidden;
}
.hero h1 .line span {
  display: inline-block;
  animation: heroLineUp 0.6s cubic-bezier(0.22,1,0.36,1) both;
}
.hero h1 .line:nth-child(2) span { animation-delay: 0.1s; }
@keyframes heroLineUp {
  from { opacity: 0; transform: translateY(100%); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 900px) {
  .hero { padding-top: 140px; padding-bottom: 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-figure { order: 2; }
}

/* ===== 信任摘要条 ===== */
.stats-bar {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  padding: 40px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.stat-number {
  font-family: var(--font-head);
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--color-brand);
  line-height: 1.2;
}
.stat-number::after { content: "+"; color: var(--color-accent); }
.stat-label {
  font-size: 0.875rem;
  color: var(--color-muted);
  letter-spacing: 0.04em;
}
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: 1fr; gap: 24px; }
  .stat-number { font-size: 2.2rem; }
}

/* ===== 功能列表 ===== */
.feature-list {
  border-top: 1px solid var(--color-line);
}
.feature-row {
  display: grid;
  grid-template-columns: 80px 240px 1fr;
  align-items: center;
  gap: 32px;
  padding: 40px 8px;
  border-bottom: 1px solid var(--color-line);
  transition: background 0.3s ease, padding-left 0.3s ease;
  cursor: default;
}
.feature-row:hover { background: rgba(30,77,59,0.02); padding-left: 20px; }
.feature-num {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
}
.feature-row h3 { font-size: 1.125rem; font-weight: 600; color: var(--color-ink); }
.feature-row p { color: var(--color-muted); font-size: 0.95rem; }
@media (max-width: 768px) {
  .feature-row { grid-template-columns: 48px 1fr; gap: 12px; padding: 28px 0; }
  .feature-row p { grid-column: 2; }
  .feature-num { font-size: 1.6rem; }
}

/* ===== 使用场景 ===== */
.scenario-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 32px 0;
}
.scenario-block + .scenario-block { margin-top: 48px; }
.scenario-block:nth-child(even) .scenario-media { order: 2; }
.scenario-media {
  aspect-ratio: 16 / 10;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-media:hover img { transform: scale(1.03); }
.scenario-body h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 12px;
}
.scenario-body p { color: var(--color-muted); font-size: 0.95rem; margin-bottom: 16px; }
.scenario-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.78rem;
  color: var(--color-brand);
  background: rgba(30,77,59,0.06);
  border-radius: var(--radius-full);
  font-weight: 500;
}
@media (max-width: 900px) {
  .scenario-block, .scenario-block:nth-child(even) { grid-template-columns: 1fr; gap: 24px; }
  .scenario-block:nth-child(even) .scenario-media { order: 0; }
}

/* ===== 成功案例 ===== */
.case-list { border-top: 1px solid var(--color-line); }
.case-row {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr auto;
  align-items: center;
  gap: 32px;
  padding: 28px 20px;
  border-bottom: 1px solid var(--color-line);
  transition: background 0.3s ease, color 0.3s ease;
  cursor: pointer;
  border-radius: 4px;
}
.case-row:hover { background: var(--color-brand); }
.case-row .case-client { font-weight: 600; font-size: 1.05rem; }
.case-row .case-industry { color: var(--color-muted); font-size: 0.9rem; }
.case-row .case-result { font-family: var(--font-head); font-size: 1.3rem; color: var(--color-brand); font-weight: 600; }
.case-row .case-arrow { color: var(--color-brand); font-size: 1.4rem; transition: transform 0.3s ease; }
.case-row:hover .case-client { color: #F5F1E8; }
.case-row:hover .case-industry { color: rgba(245,241,232,0.7); }
.case-row:hover .case-result { color: var(--color-accent); }
.case-row:hover .case-arrow { color: var(--color-accent); transform: translateX(4px); }
@media (max-width: 768px) {
  .case-row { grid-template-columns: 1fr auto; gap: 8px; padding: 20px 12px; }
  .case-industry, .case-result { grid-column: 1; }
  .case-result { font-size: 1.1rem; }
}

/* ===== 价格方案 ===== */
.pricing {
  background: var(--color-brand);
  padding: 96px 0;
}
.pricing .section-head h2 { color: #F5F1E8; }
.pricing .section-head .section-index { color: var(--color-accent); }
.pricing .section-desc { color: rgba(245,241,232,0.7); }
.pricing-panel {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  overflow: hidden;
}
.pricing-tier {
  padding: 48px 36px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
  border-right: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s ease;
}
.pricing-tier:last-child { border-right: none; }
.pricing-tier:hover { background: rgba(255,255,255,0.03); }
.pricing-tier.recommended { background: rgba(201,168,118,0.1); }
.rec-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: var(--color-ink);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 20px;
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.tier-info h3 { font-family: var(--font-head); font-size: 1.3rem; color: #F5F1E8; }
.tier-info p { color: rgba(245,241,232,0.6); font-size: 0.88rem; margin-top: 6px; line-height: 1.7; }
.tier-facts { display: flex; flex-wrap: wrap; gap: 8px; }
.tier-facts span {
  font-size: 0.75rem;
  color: rgba(245,241,232,0.7);
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-full);
  padding: 4px 14px;
}
.tier-price {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 600;
  color: #F5F1E8;
}
.tier-price span { font-size: 0.9rem; font-weight: 400; color: rgba(245,241,232,0.5); }
@media (max-width: 900px) {
  .pricing { padding: 64px 0; }
  .pricing-panel { grid-template-columns: 1fr; }
  .pricing-tier { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.08); padding: 40px 28px; }
  .pricing-tier:last-child { border-bottom: none; }
  .rec-badge { top: 0; }
}

/* ===== 资讯列表 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.news-card a { display: block; }
.news-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.news-cat {
  font-size: 0.75rem;
  color: var(--color-brand);
  background: rgba(30,77,59,0.08);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-weight: 500;
}
.news-date {
  font-size: 0.82rem;
  color: var(--color-accent);
  font-family: var(--font-head);
  letter-spacing: 0.03em;
}
.news-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
  margin-bottom: 12px;
}
.news-card p {
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--color-brand);
}
.news-link::after { content: "→"; transition: transform 0.3s ease; }
.news-card:hover .news-link::after { transform: translateX(4px); }
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--color-muted);
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
@media (max-width: 768px) {
  .news-grid { grid-template-columns: 1fr; }
  .news-card { padding: 24px; }
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 120px 0;
  background:
    linear-gradient(rgba(23,33,28,0.6), rgba(23,33,28,0.6)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  text-align: center;
}
.cta-inner { max-width: 640px; margin: 0 auto; position: relative; z-index: 2; }
.cta-inner h2 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  color: #F5F1E8;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 20px;
}
.cta-inner p { color: rgba(245,241,232,0.8); font-size: 1rem; margin-bottom: 36px; }
.cta-inner .btn { margin: 0 8px; }
@media (max-width: 768px) {
  .cta-section { padding: 80px 0; }
  .cta-inner .btn { width: 100%; margin: 8px 0; }
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; color: var(--color-muted); max-width: 28ch; }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: 0.88rem; color: var(--color-muted); }
.footer-col a:hover { color: var(--color-brand); }
.footer-contact li { font-size: 0.88rem; color: var(--color-muted); display: flex; align-items: center; gap: 8px; }
.footer-contact li span { color: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p { font-size: 0.82rem; color: var(--color-muted); }
.back-to-top {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 1rem;
  color: var(--color-ink);
}
.back-to-top:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-ink); }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

/* ===== 滚动显现 ===== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s cubic-bezier(0.22,1,0.36,1), transform 0.5s cubic-bezier(0.22,1,0.36,1); will-change: opacity, transform; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* roulang page: category1 */
:root {
  --color-brand: #1E4D3B;
  --color-brand-deep: #163A2C;
  --color-accent: #C9A876;
  --color-bg: #FAF8F5;
  --color-surface: #FFFFFF;
  --color-ink: #17211C;
  --color-muted: #6F7A72;
  --color-line: #E7E1D8;
  --color-error: #B4545A;
  --color-success: #2E6E4E;
  --shadow-sm: 0 2px 8px rgba(23, 33, 28, 0.06);
  --shadow-lg: 0 12px 32px rgba(23, 33, 28, 0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --container-width: 1200px;
  --space-section: 96px;
}

/* Reset */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.85;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul,
ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input,
textarea,
select {
  font-family: inherit;
}
table {
  border-collapse: collapse;
  width: 100%;
}
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
::selection {
  background: rgba(201, 168, 118, 0.30);
}

/* Container */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.35;
  color: var(--color-ink);
}
h1 {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0.01em;
}
h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
}
h3 {
  font-size: 1.125rem;
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-ink);
}
p {
  color: var(--color-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.2;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background-color: var(--color-brand);
  color: #FBF9F5;
}
.btn-primary:hover {
  background-color: var(--color-accent);
  color: var(--color-brand);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-secondary {
  border: 1px solid rgba(30, 77, 59, 0.35);
  color: var(--color-brand);
  background: transparent;
}
.btn-secondary:hover {
  background-color: rgba(30, 77, 59, 0.05);
  border-color: var(--color-brand);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: background-color 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background-color: rgba(250, 248, 245, 0.96);
  border-bottom-color: var(--color-line);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-brand);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  border-radius: 9px;
}
.brand-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: 0.01em;
}
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  position: relative;
  font-size: 0.95rem;
  color: var(--color-ink);
  padding: 6px 2px;
  transition: color 0.2s ease;
}
.main-nav a:hover {
  color: var(--color-brand);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.main-nav a.active::after,
.main-nav a:hover::after {
  transform: scaleX(1);
}
.main-nav a.active {
  color: var(--color-brand);
  font-weight: 500;
}
.header-cta {
  padding: 10px 22px;
  font-size: 0.9rem;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(30, 77, 59, 0.06);
  align-items: center;
  justify-content: center;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-brand);
  border-radius: 2px;
  transition: transform 0.3s ease;
}
.nav-toggle span {
  position: relative;
}
.nav-toggle span::before {
  position: absolute;
  top: -6px;
  left: 0;
  width: 14px;
}
.nav-toggle span::after {
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 14px;
}
.nav-toggle.active span {
  background: transparent;
}
.nav-toggle.active span::before {
  top: 0;
  width: 20px;
  transform: rotate(45deg);
}
.nav-toggle.active span::after {
  bottom: 0;
  width: 20px;
  transform: rotate(-45deg);
}

/* Page Hero */
.page-hero {
  padding-top: 180px;
  padding-bottom: 88px;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "C7";
  position: absolute;
  right: -30px;
  top: 40px;
  font-family: var(--font-serif);
  font-size: 14rem;
  font-weight: 700;
  color: rgba(30, 77, 59, 0.045);
  line-height: 1;
  pointer-events: none;
  transform: rotate(8deg);
  user-select: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 72px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 1px;
  background: var(--color-accent);
}
.hero-lead {
  font-size: 1.06rem;
  color: var(--color-muted);
  max-width: 46ch;
  margin-top: 22px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-media {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  pointer-events: none;
}

/* Section */
.section {
  padding: var(--space-section) 0;
  background: var(--color-bg);
}
.section-head {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 32px;
}
.section-num {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  flex-shrink: 0;
}
.section-head h2 {
  flex: 1;
}
.section-head .section-desc {
  max-width: 400px;
  font-size: 0.92rem;
  color: var(--color-muted);
  text-align: right;
}

/* Feature Rows */
.feature-list {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.feature-row {
  display: grid;
  grid-template-columns: 120px 1fr 280px;
  gap: 40px;
  align-items: center;
  padding: 52px 0;
  border-bottom: 1px solid var(--color-line);
  transition: background-color 0.3s ease, padding 0.3s ease;
}
.feature-row:last-child {
  border-bottom: none;
}
.feature-row:hover {
  background-color: rgba(30, 77, 59, 0.025);
}
.feature-row-num {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(30, 77, 59, 0.22);
  line-height: 1;
}
.feature-row:hover .feature-row-num {
  -webkit-text-stroke-color: var(--color-accent);
}
.feature-row-body h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}
.feature-row-body p {
  max-width: 520px;
  font-size: 0.95rem;
}
.feature-row-media {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-sm);
}
.feature-row-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.feature-row:hover .feature-row-media img {
  transform: scale(1.03);
}

/* Welfare / Guarantee */
.guarantee-section {
  background: var(--color-bg);
}
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.guarantee-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 36px 30px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.guarantee-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.guarantee-card .g-num {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
}
.guarantee-card h3 {
  margin-top: 18px;
  margin-bottom: 10px;
  font-size: 1.1rem;
}
.guarantee-card p {
  font-size: 0.92rem;
}

/* Spec Table */
.spec-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.spec-table-wrap {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.spec-table {
  width: 100%;
  font-size: 0.95rem;
}
.spec-table thead th {
  background: var(--color-brand);
  color: #F5F1E9;
  font-weight: 500;
  padding: 18px 28px;
  text-align: left;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.spec-table tbody td {
  padding: 18px 28px;
  border-bottom: 1px solid var(--color-line);
  line-height: 1.7;
}
.spec-table tbody tr:last-child td {
  border-bottom: none;
}
.spec-table tbody td:first-child {
  font-weight: 500;
  color: var(--color-ink);
  width: 220px;
  font-family: var(--font-serif);
}
.spec-table tbody td:last-child {
  color: var(--color-muted);
}
.spec-table tbody tr {
  transition: background-color 0.2s ease;
}
.spec-table tbody tr:hover {
  background-color: rgba(30, 77, 59, 0.025);
}

/* CTA Section */
.cta-section {
  position: relative;
  padding: 110px 0;
  background: linear-gradient(rgba(22, 58, 44, 0.90), rgba(22, 58, 44, 0.90)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(30, 77, 59, 0.18);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 0 auto;
}
.cta-section h2 {
  color: #F5F1E9;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  margin-bottom: 18px;
}
.cta-section p {
  color: rgba(245, 241, 233, 0.82);
  max-width: 520px;
  margin: 0 auto 36px;
  font-size: 1rem;
}
.cta-section .btn-primary {
  background-color: var(--color-accent);
  color: var(--color-brand);
  box-shadow: var(--shadow-lg);
}
.cta-section .btn-primary:hover {
  background-color: #F5F1E9;
  color: var(--color-brand);
}

/* Footer */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand-name {
  font-size: 1.06rem;
}
.footer-brand p {
  font-size: 0.92rem;
  margin-top: 16px;
  max-width: 32ch;
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 16px;
}
.footer-col ul {
  display: grid;
  gap: 10px;
}
.footer-col a,
.footer-col li {
  font-size: 0.92rem;
  color: var(--color-muted);
  transition: color 0.2s ease;
}
.footer-col a:hover {
  color: var(--color-brand);
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact span {
  color: var(--color-accent);
  font-style: normal;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  border-top: 1px solid var(--color-line);
}
.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-muted);
}
.back-to-top {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-brand);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.back-to-top:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Form / FAQ / Blockquote / Empty state – unified for all pages */
.form-line {
  display: grid;
  gap: 6px;
}
.form-line label {
  font-size: 0.82rem;
  color: var(--color-muted);
}
.form-line label .required {
  color: var(--color-error);
}
.form-line input,
.form-line textarea,
.form-line select {
  border: none;
  border-bottom: 1px solid var(--color-line);
  background: transparent;
  padding: 10px 2px;
  font-size: 0.95rem;
  color: var(--color-ink);
  border-radius: 0;
  transition: border-color 0.2s ease;
}
.form-line input:focus,
.form-line textarea:focus,
.form-line select:focus {
  outline: none;
  border-bottom-color: var(--color-accent);
}
.form-error {
  font-size: 0.82rem;
  color: var(--color-error);
}
.form-success {
  font-size: 0.82rem;
  color: var(--color-success);
}
.faq-list {
  border-top: 1px solid var(--color-line);
}
.faq-item {
  border-bottom: 1px solid var(--color-line);
}
.faq-q {
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  gap: 12px;
  align-items: center;
  width: 100%;
  padding: 24px 0;
  text-align: left;
  background: transparent;
  color: var(--color-ink);
}
.faq-q .faq-num {
  font-family: var(--font-serif);
  color: var(--color-accent);
  font-size: 0.9rem;
}
.faq-q .faq-title {
  font-size: 1rem;
  font-weight: 500;
}
.faq-q .faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  margin-left: auto;
}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-brand);
  transition: transform 0.3s ease;
}
.faq-q .faq-icon::after {
  transform: rotate(90deg);
}
.faq-item.open .faq-icon::after {
  transform: rotate(0deg);
}
.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
}
.faq-item.open .faq-a {
  grid-template-rows: 1fr;
}
.faq-a-inner {
  overflow: hidden;
}
.faq-a p {
  display: inline-block;
  font-size: 0.92rem;
  color: var(--color-muted);
  padding: 0 0 24px 56px;
  max-width: 720px;
}
blockquote {
  border-left: 4px solid var(--color-brand);
  padding-left: 20px;
  font-size: 1.05rem;
  font-family: var(--font-serif);
  color: var(--color-ink);
  line-height: 1.75;
  margin: 24px 0;
}
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 32px;
  border: 1px dashed var(--color-line);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Media Queries */
@media (max-width: 1024px) {
  .hero-grid {
    gap: 40px;
  }
  .feature-row {
    grid-template-columns: 80px 1fr 220px;
    gap: 28px;
  }
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 64px;
  }
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-brand);
    z-index: -1;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.35s ease, visibility 0.35s ease, transform 0.35s ease;
  }
  .main-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .main-nav ul {
    flex-direction: column;
    justify-content: center;
    height: 100%;
    gap: 4px;
    padding: 24px;
  }
  .main-nav li {
    width: 100%;
    text-align: center;
  }
  .main-nav a {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: rgba(245, 241, 233, 0.88);
    padding: 16px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  }
  .main-nav a::after {
    display: none;
  }
  .main-nav a.active {
    color: var(--color-accent);
  }
  .header-cta {
    display: none;
  }
  .page-hero {
    padding-top: 150px;
    padding-bottom: 56px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-media {
    aspect-ratio: 16 / 10;
    width: 100%;
  }
  .hero-lead {
    font-size: 1rem;
  }
  .section-head {
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 36px;
  }
  .section-head .section-desc {
    text-align: left;
    max-width: 100%;
  }
  .feature-row {
    grid-template-columns: 52px 1fr;
    padding: 40px 0;
    gap: 18px;
  }
  .feature-row-num {
    font-size: 1.9rem;
  }
  .feature-row-media {
    grid-column: 1 / -1;
    aspect-ratio: 16 / 9;
    max-width: 100%;
  }
  .feature-row-body p {
    font-size: 0.92rem;
  }
  .guarantee-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .cta-section {
    padding: 80px 0;
  }
  .spec-table thead th,
  .spec-table tbody td {
    padding: 14px 16px;
  }
}

@media (max-width: 520px) {
  .header-inner {
    height: 66px;
  }
  .feature-row {
    grid-template-columns: 1fr;
  }
  .feature-row-num {
    font-size: 1.5rem;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .spec-table {
    font-size: 0.88rem;
  }
  .spec-table tbody td:first-child {
    width: 120px;
  }
  .cta-section h2 {
    font-size: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* roulang page: article */
:root {
  --color-brand: #1E4D3B;
  --color-accent: #C9A876;
  --color-bg: #FAF8F5;
  --color-surface: #FFFFFF;
  --color-ink: #17211C;
  --color-muted: #6F7A72;
  --color-line: #E7E1D8;
  --color-error: #B4545A;
  --color-success: #2E6E4E;
  --shadow-sm: 0 2px 8px rgba(23,33,28,0.06);
  --shadow-lg: 0 12px 32px rgba(23,33,28,0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --container: 1200px;
  --space-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--color-brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-accent); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.3;
  font-weight: 600;
  color: var(--color-ink);
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
  transition: background .25s ease, color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.btn:focus-visible, a:focus-visible, button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--color-brand);
  color: #F5F1E8;
}
.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-brand);
  transform: translateY(-1px);
}
.btn-outline {
  border-color: var(--color-line);
  color: var(--color-brand);
  background: transparent;
}
.btn-outline:hover {
  background: rgba(30,77,59,0.04);
  border-color: var(--color-brand);
  color: var(--color-brand);
}
.btn-accent {
  background: var(--color-accent);
  color: var(--color-brand);
}
.btn-accent:hover {
  background: #D9B986;
  color: var(--color-brand);
  transform: translateY(-1px);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: transparent;
  transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(250,248,245,0.92);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-brand);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  border-radius: 8px;
}
.brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ink);
  white-space: nowrap;
}
.main-nav ul {
  display: flex;
  gap: 32px;
}
.main-nav a {
  position: relative;
  padding: 8px 2px;
  font-size: 0.9375rem;
  color: var(--color-muted);
}
.main-nav a:hover { color: var(--color-ink); }
.main-nav a.active { color: var(--color-ink); font-weight: 600; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}
.header-cta { margin-left: 24px; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  position: relative;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  display: block;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.menu-drawer {
  position: fixed;
  inset: 0;
  background: var(--color-brand);
  z-index: 1000;
  transform: translateY(-100%);
  transition: transform .4s cubic-bezier(0.22, 1, 0.36, 1);
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
}
body.drawer-open .menu-drawer {
  transform: translateY(0);
  visibility: visible;
}
body.drawer-open { overflow: hidden; }
.drawer-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  font-size: 2rem;
  color: var(--color-bg);
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .2s, transform .2s;
}
.drawer-close:hover {
  color: var(--color-accent);
  transform: rotate(90deg);
}
.drawer-menu {
  text-align: center;
}
.drawer-menu li a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-bg);
  padding: 12px 8px;
  transition: color .2s, padding-left .2s;
}
.drawer-menu li a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}
.drawer-num {
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}
.drawer-cta {
  margin-top: 24px;
  background: var(--color-accent);
  color: var(--color-brand);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 32px 0 8px;
  font-size: 0.875rem;
  color: var(--color-muted);
}
.breadcrumb a {
  color: var(--color-muted);
  transition: color .2s;
}
.breadcrumb a:hover { color: var(--color-brand); }
.breadcrumb-sep { color: var(--color-line); }
.breadcrumb-cat { color: var(--color-muted); }
.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 280px;
}

/* 文章页 */
.article-page {
  padding-bottom: 24px;
}
.article-header {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0 24px;
}
.article-meta-top {
  margin-bottom: 16px;
}
.article-cat-label {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.75rem;
  color: var(--color-brand);
  background: rgba(30,77,59,0.06);
  border-radius: var(--radius-full);
  letter-spacing: 0.04em;
}
.article-header h1 {
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  line-height: 1.35;
  margin-bottom: 20px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-muted);
}
.article-meta-dot { color: var(--color-line); }
.article-meta-item { color: var(--color-muted); }

.article-body {
  max-width: 720px;
  margin: 40px auto 0;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--color-ink);
}
.article-body h2 {
  font-size: 1.75rem;
  margin: 2.2em 0 0.9em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--color-line);
}
.article-body h3 {
  font-size: 1.3rem;
  margin: 2em 0 0.7em;
}
.article-body p {
  margin: 1.5em 0;
}
.article-body ul,
.article-body ol {
  margin: 1.5em 0;
  padding-left: 1.4em;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
  margin: 0.5em 0;
}
.article-body blockquote {
  margin: 2em 0;
  padding: 16px 24px;
  border-left: 4px solid var(--color-brand);
  background: rgba(30,77,59,0.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-muted);
}
.article-body blockquote p { margin: 0; }
.article-body img {
  border-radius: var(--radius-md);
  margin: 2em auto;
  box-shadow: var(--shadow-sm);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2em 0;
  font-size: 0.9375rem;
}
.article-body th,
.article-body td {
  border: 1px solid var(--color-line);
  padding: 12px 16px;
  text-align: left;
}
.article-body th {
  background: var(--color-brand);
  color: #F5F1E8;
  font-weight: 600;
}
.article-body tr:nth-child(even) td {
  background: rgba(232,229,222,0.3);
}
.article-body a {
  color: var(--color-brand);
  border-bottom: 1px dotted var(--color-accent);
}
.article-body a:hover {
  color: var(--color-accent);
}

/* 上一篇 / 下一篇 */
.article-nav {
  max-width: 720px;
  margin: 56px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--color-line);
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.article-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.article-nav-next { text-align: right; }
.article-nav-label {
  font-size: 0.8125rem;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}
.article-nav-item a {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-ink);
  line-height: 1.5;
  transition: color .2s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-nav-item a:hover { color: var(--color-accent); }

/* 文章未找到 */
.article-not-found {
  max-width: 640px;
  margin: 80px auto;
  text-align: center;
  padding: 64px 32px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}
.article-not-found-code {
  font-family: var(--font-serif);
  font-size: 5rem;
  color: var(--color-line);
  line-height: 1;
  margin-bottom: 16px;
}
.article-not-found h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--color-muted);
  margin-bottom: 32px;
}

/* 相关推荐 */
.related-section {
  padding: var(--space-section) 0 0;
}
.section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 8px;
}
.section-index {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  line-height: 1;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-accent);
}
.related-card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
}
.related-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.related-card:hover .related-card-media img { transform: scale(1.03); }
.related-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.related-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.related-card-date {
  font-family: var(--font-serif);
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}
.related-card-cat {
  font-size: 0.75rem;
  padding: 3px 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-full);
  color: var(--color-muted);
}
.related-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
  transition: color .2s;
}
.related-card h3:hover { color: var(--color-brand); }
.related-card p {
  font-size: 0.875rem;
  color: var(--color-muted);
  line-height: 1.7;
  flex: 1;
}
.related-card-more {
  font-size: 0.875rem;
  color: var(--color-brand);
  font-weight: 500;
  transition: color .2s;
}
.related-card:hover .related-card-more { color: var(--color-accent); }

/* CTA */
.cta-section {
  margin-top: var(--space-section);
  background: linear-gradient(rgba(30,77,59,0.88), rgba(30,77,59,0.88)), url('/assets/images/backpic/back-2.png') no-repeat center / cover;
  padding: 80px 0;
  text-align: center;
}
.cta-inner {
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: #F5F1E8;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(245,241,232,0.8);
  margin-bottom: 32px;
}
.cta-inner .btn-primary {
  background: var(--color-accent);
  color: var(--color-brand);
}
.cta-inner .btn-primary:hover {
  background: #E0C38E;
  color: var(--color-brand);
  transform: translateY(-1px);
}

/* 页脚 */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  color: var(--color-muted);
  font-size: 0.875rem;
  margin-top: 12px;
  max-width: 260px;
}
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col a {
  font-size: 0.875rem;
  color: var(--color-muted);
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: var(--color-brand);
  padding-left: 4px;
}
.footer-contact li {
  font-size: 0.875rem;
  color: var(--color-muted);
  display: flex;
  gap: 8px;
  align-items: center;
}
.footer-bottom {
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-muted);
}
.back-to-top {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-muted);
  transition: background .25s, color .25s, border-color .25s, transform .25s;
}
.back-to-top:hover {
  background: var(--color-accent);
  color: var(--color-brand);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* 滚动显现 */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s cubic-bezier(0.22, 1, 0.36, 1), transform .5s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}

/* 响应式 */
@media (max-width: 1024px) {
  .main-nav ul { gap: 20px; }
  .main-nav a { font-size: 0.875rem; }
  .header-cta { padding: 10px 18px; margin-left: 12px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  .main-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .article-nav { flex-direction: column; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .container { padding: 0 20px; }
  .breadcrumb { padding-top: 20px; }
  .article-header { padding-top: 24px; }
  .article-header h1 { font-size: 1.75rem; }
  .article-body { font-size: 1rem; }
  .cta-section { padding: 56px 0; }
  .header-inner { height: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* roulang page: category2 */
:root {
  --color-brand: #1E4D3B;
  --color-accent: #C9A876;
  --color-bg: #FAF8F5;
  --color-surface: #FFFFFF;
  --color-ink: #17211C;
  --color-muted: #6F7A72;
  --color-line: #E7E1D8;
  --color-error: #B4545A;
  --color-success: #2E6E4E;
  --shadow-sm: 0 2px 8px rgba(23,33,28,0.06);
  --shadow-lg: 0 12px 32px rgba(23,33,28,0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-full: 999px;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --space-section: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

.btn-primary {
  background: var(--color-brand);
  color: #FAF8F5;
}

.btn-primary:hover {
  background: var(--color-accent);
  color: var(--color-brand);
  transform: translateY(-1px);
}

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

.btn-lg {
  padding: 16px 40px;
  font-size: 1.0625rem;
}

.btn-outline {
  border-color: var(--color-line);
  color: var(--color-ink);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(30, 77, 59, 0.04);
  border-color: var(--color-brand);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  background: transparent;
}

.site-header.scrolled {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  background: var(--color-brand);
  color: var(--color-accent);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 32px;
}

.main-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  color: var(--color-muted);
  padding: 6px 2px;
  transition: color 0.3s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.main-nav a:hover {
  color: var(--color-brand);
}

.main-nav a.active {
  color: var(--color-brand);
  font-weight: 500;
}

.main-nav a.active::after {
  transform: scaleX(1);
}

.main-nav a.active::before {
  display: none;
}

.header-cta {
  flex-shrink: 0;
  margin-left: 16px;
  padding: 10px 22px;
  font-size: 0.875rem;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 0;
  cursor: pointer;
  position: relative;
  z-index: 1201;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  position: relative;
  margin: 0 auto;
  transition: background 0.3s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.3s ease, background 0.3s ease;
}

.nav-toggle span::before {
  top: -8px;
}

.nav-toggle span::after {
  top: 8px;
}

.nav-toggle.active span {
  background: transparent;
}

.nav-toggle.active span::before {
  transform: rotate(45deg);
  top: 0;
  background: #fff;
}

.nav-toggle.active span::after {
  transform: rotate(-45deg);
  top: 0;
  background: #fff;
}

/* ===== 页面导语 ===== */
.page-hero {
  position: relative;
  overflow: hidden;
  padding: 172px 0 96px;
  background: var(--color-bg);
}

.page-hero::before {
  content: "场景";
  position: absolute;
  right: -20px;
  top: 30px;
  font-family: var(--font-serif);
  font-size: 220px;
  line-height: 1;
  color: rgba(30, 77, 59, 0.045);
  transform: rotate(8deg);
  pointer-events: none;
  z-index: 0;
}

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

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 20px;
}

.hero-kicker::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--color-accent);
  display: inline-block;
}

.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--color-brand);
}

.hero-lead {
  max-width: 60ch;
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--color-muted);
}

/* ===== 场景区 ===== */
.scenario-section {
  padding: var(--space-section) 0;
  background: var(--color-surface);
}

.scenario-section:nth-of-type(3) {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.scenario-section:nth-of-type(4) {
  background: var(--color-surface);
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: center;
}

.scenario-reverse .scenario-media {
  order: 2;
}

.scenario-media {
  overflow: hidden;
  border-radius: var(--radius-md);
}

.scenario-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-md);
  transition: transform 0.4s ease;
}

.scenario-media a {
  display: block;
  border-radius: var(--radius-md);
}

.scenario-media:hover img {
  transform: scale(1.03);
}

.scenario-index {
  display: block;
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 600;
  line-height: 1;
  color: var(--color-line);
  margin-bottom: 20px;
}

.scenario-text h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 16px;
}

.scenario-text > p {
  color: var(--color-muted);
  margin-bottom: 24px;
}

.scenario-meta {
  border-top: 1px solid var(--color-line);
}

.scenario-meta li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 0.9375rem;
  color: var(--color-ink);
}

.scenario-meta strong {
  min-width: 88px;
  color: var(--color-brand);
  font-weight: 600;
  flex-shrink: 0;
}

/* ===== 实施流程 ===== */
.process-section {
  padding: var(--space-section) 0;
  background: var(--color-brand);
  color: #fff;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}

.section-head .section-no {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
}

.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.section-head p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9375rem;
  margin-top: 8px;
}

.section-head.light .section-no {
  color: var(--color-accent);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.step {
  padding: 32px 28px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  position: relative;
}

.step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 36px;
  width: 1px;
  height: calc(100% - 68px);
  background: rgba(255, 255, 255, 0.15);
}

.step-num {
  display: inline-flex;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--color-accent);
  margin-bottom: 20px;
}

.step h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 统计区 ===== */
.stats-section {
  padding: 72px 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  font-weight: 600;
  color: var(--color-brand);
  line-height: 1.2;
}

.stat-suffix {
  font-size: 1.25rem;
  color: var(--color-brand);
  margin-left: 4px;
  font-family: var(--font-serif);
}

.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
}

/* ===== CTA ===== */
.cta-section {
  padding: 120px 0;
  background: linear-gradient(rgba(30, 77, 59, 0.88), rgba(30, 77, 59, 0.88)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
}

.cta-inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  color: #fff;
}

.cta-inner h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 16px;
}

.cta-inner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1rem;
  margin-bottom: 36px;
  line-height: 1.85;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--color-muted);
  max-width: 32ch;
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

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

.footer-col ul li a {
  font-size: 0.9rem;
  color: var(--color-muted);
  transition: color 0.3s ease;
}

.footer-col ul li a:hover {
  color: var(--color-brand);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--color-line);
  padding: 24px 0 28px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.back-to-top {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: transparent;
  color: var(--color-ink);
  font-size: 1rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
  flex-shrink: 0;
}

.back-to-top:hover {
  background: var(--color-accent);
  color: var(--color-brand);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

/* ===== 滚动显现 ===== */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1), transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.js-ready .reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: min(78%, 380px);
    background: var(--color-brand);
    transform: translateX(105%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1200;
    box-shadow: var(--shadow-lg);
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav ul {
    flex-direction: column;
    gap: 28px;
    width: 100%;
    padding: 0 48px;
  }

  .main-nav a {
    color: rgba(255, 255, 255, 0.85);
    font-family: var(--font-serif);
    font-size: 1.35rem;
    padding: 8px 0;
    width: 100%;
  }

  .main-nav a.active {
    color: #fff;
  }

  .main-nav a.active::before {
    display: inline-flex;
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
  }

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

  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  body.nav-open {
    overflow: hidden;
  }

  .scenario-grid {
    gap: 48px;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 0;
  }

  .step:nth-child(2)::after {
    display: none;
  }

  .step {
    padding: 24px 24px 0;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 64px;
  }

  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-hero {
    padding: 140px 0 64px;
  }

  .page-hero::before {
    font-size: 140px;
    right: -10px;
    top: 20px;
  }

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

  .scenario-reverse .scenario-media {
    order: 1;
  }

  .scenario-media img {
    aspect-ratio: 16 / 10;
  }

  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 36px;
  }

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

  .step:not(:last-child)::after {
    display: none;
  }

  .step {
    border-top: 1px solid rgba(255, 255, 255, 0.25);
    padding: 20px 0;
  }

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .cta-section {
    padding: 80px 0;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .brand-name {
    font-size: 1.1rem;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 1.1rem;
  }

  .main-nav ul {
    padding: 0 32px;
  }

  .scenario-meta li {
    flex-direction: column;
    gap: 4px;
  }

  .scenario-meta strong {
    min-width: auto;
  }

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

  .footer-brand {
    grid-column: auto;
  }

  .hero-lead {
    font-size: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }

  .js-ready .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }

  .scenario-media img {
    transform: none !important;
  }
}

/* roulang page: category3 */
:root{
  --color-brand:#1E4D3B;
  --color-accent:#C9A876;
  --color-bg:#FAF8F5;
  --color-surface:#FFFFFF;
  --color-ink:#17211C;
  --color-muted:#6F7A72;
  --color-line:#E7E1D8;
  --color-error:#B4545A;
  --color-success:#2E6E4E;
  --shadow-sm:0 2px 8px rgba(23,33,28,.06);
  --shadow-lg:0 12px 32px rgba(23,33,28,.10);
  --radius-sm:6px;
  --radius-md:12px;
  --radius-full:999px;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  --container:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-ink);line-height:1.85;font-size:1rem;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:76px;transition:background .2s ease,box-shadow .2s ease}
.site-header.scrolled{background:var(--color-bg);box-shadow:0 1px 0 var(--color-line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;background:var(--color-brand);color:var(--color-accent);display:flex;align-items:center;justify-content:center;border-radius:8px;font-family:var(--font-serif);font-size:1.25rem;font-weight:600}
.brand-name{font-family:var(--font-serif);font-size:1.125rem;font-weight:600;color:var(--color-ink);transition:color .2s}
.site-header:not(.scrolled) .brand-name{color:#fff}
.main-nav{display:none}
.main-nav ul{display:flex;gap:32px}
.main-nav a{position:relative;padding:8px 0;font-size:.9375rem;font-weight:500;color:var(--color-ink);transition:color .25s;white-space:nowrap}
.site-header:not(.scrolled) .main-nav a{color:rgba(255,255,255,.92)}
.main-nav a:hover{color:var(--color-brand)}
.site-header:not(.scrolled) .main-nav a:hover{color:#fff}
.main-nav a.active{color:var(--color-brand)}
.site-header:not(.scrolled) .main-nav a.active{color:#fff}
.main-nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--color-accent);border-radius:2px}
.header-cta{display:none;margin-left:16px}
.nav-toggle{display:flex;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--color-ink);border-radius:2px;transition:background .2s}
.site-header:not(.scrolled) .nav-toggle span{background:#fff}
.mobile-drawer{position:fixed;inset:0;background:var(--color-brand);z-index:2000;display:flex;flex-direction:column;padding:28px;opacity:0;visibility:hidden;transform:translateX(24px);transition:opacity .3s ease,transform .3s ease,visibility .3s}
body.nav-open .mobile-drawer{opacity:1;visibility:visible;transform:none}
body.nav-open{overflow:hidden}
.drawer-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:40px}
.drawer-brand{color:#fff;font-family:var(--font-serif);font-size:1.25rem;font-weight:600}
.drawer-close{color:#fff;font-size:2.2rem;line-height:1;padding:4px;transition:color .2s}
.drawer-close:hover{color:var(--color-accent)}
.drawer-nav ul{display:flex;flex-direction:column;gap:6px}
.drawer-link{display:flex;align-items:center;gap:14px;color:rgba(255,255,255,.88);font-family:var(--font-serif);font-size:1.5rem;font-weight:500;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.12);transition:color .25s,padding-left .25s}
.drawer-link:hover{color:var(--color-accent);padding-left:6px}
.drawer-link span{font-size:.875rem;color:var(--color-accent)}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:var(--radius-full);font-size:.9375rem;font-weight:600;line-height:1;transition:background .25s,color .25s,transform .15s,border-color .25s;outline:none;white-space:nowrap}
.btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:2px}
.btn-primary{background:var(--color-brand);color:#fff}
.btn-primary:hover{background:var(--color-accent);color:var(--color-brand);transform:translateY(-1px)}
.btn-primary:active{transform:none}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:#fff}
.btn-block{width:100%}

/* Hero */
.page-hero{position:relative;display:flex;align-items:center;min-height:520px;padding:150px 0 80px;color:#fff;overflow:hidden;background-color:var(--color-brand)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.35}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(23,33,28,.35),rgba(23,33,28,.7))}
.hero-content{position:relative;z-index:2}
.hero-deco{position:absolute;right:3%;bottom:8%;font-family:var(--font-serif);font-size:11rem;font-weight:700;line-height:1;color:transparent;-webkit-text-stroke:1px rgba(255,255,255,.16);transform:rotate(8deg);z-index:1;display:none}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8125rem;letter-spacing:2px;color:var(--color-accent);margin-bottom:18px}
.hero-eyebrow::before{content:"";width:24px;height:1px;background:var(--color-accent)}
.page-hero h1{font-family:var(--font-serif);font-size:clamp(2.4rem,5vw,4rem);font-weight:600;line-height:1.25;margin-bottom:20px;max-width:14em}
.page-hero p{max-width:58ch;color:rgba(255,255,255,.82);font-size:1.0625rem;margin-bottom:40px}
.hero-metrics{display:flex;gap:36px;flex-wrap:wrap}
.metric strong{display:block;font-family:var(--font-serif);font-size:clamp(1.6rem,3vw,2.6rem);color:var(--color-accent);font-weight:600;line-height:1.2}
.metric span{font-size:.875rem;color:rgba(255,255,255,.72)}

/* Section */
.section{padding:64px 0}
.section-head{display:flex;align-items:flex-start;gap:18px;margin-bottom:40px}
.section-index{font-size:1rem;font-weight:600;color:var(--color-accent);line-height:1.4;padding-top:4px;flex-shrink:0}
.section-head h2{font-family:var(--font-serif);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:600;line-height:1.3}
.section-head p{color:var(--color-muted);margin-top:8px;max-width:54ch}

/* News */
.news-grid{display:grid;grid-template-columns:1fr;gap:24px}
.news-card{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-md);overflow:hidden;transition:box-shadow .3s,transform .3s}
.news-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.news-media{overflow:hidden}
.news-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s}
.news-card:hover .news-media img{transform:scale(1.03)}
.news-body{padding:24px}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.tag{display:inline-block;padding:3px 10px;background:rgba(30,77,59,.08);color:var(--color-brand);border-radius:var(--radius-full);font-size:.75rem;font-weight:600}
.news-meta time{font-size:.8125rem;color:var(--color-muted)}
.news-card h3{font-size:1.125rem;font-weight:600;line-height:1.55;margin-bottom:10px}
.news-card p{color:var(--color-muted);font-size:.9375rem}
.more-link{display:inline-flex;align-items:center;gap:6px;margin-top:18px;font-size:.875rem;font-weight:600;color:var(--color-brand);transition:gap .25s}
.more-link:hover{gap:10px;text-decoration:underline}

/* Service panel */
.service-panel{background:var(--color-brand);padding:64px 0}
.service-panel .section-head h2{color:#fff}
.service-panel .section-head p{color:rgba(255,255,255,.62)}
.service-panel .section-index{color:var(--color-accent)}
.service-grid{display:grid;grid-template-columns:1fr;gap:1px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.12)}
.service-item{background:var(--color-brand);padding:30px;transition:background .3s}
.service-item:hover{background:rgba(255,255,255,.06)}
.service-item span{color:var(--color-accent);font-family:var(--font-serif);font-size:1rem}
.service-item h3{font-family:var(--font-serif);font-size:1.25rem;color:#fff;margin:12px 0 8px}
.service-item p{color:rgba(255,255,255,.7);font-size:.9375rem}

/* FAQ */
.faq-list{max-width:880px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--color-line)}
.faq-question{display:flex;align-items:center;gap:16px;width:100%;padding:26px 0;text-align:left;transition:background .2s}
.faq-question:hover .faq-text{color:var(--color-brand)}
.faq-no{color:var(--color-accent);font-family:var(--font-serif);font-size:.875rem;flex-shrink:0}
.faq-text{flex:1;font-size:1.0625rem;font-weight:600;transition:color .25s}
.faq-icon{font-size:1.5rem;color:var(--color-brand);transform:rotate(0deg);transition:transform .35s;font-weight:400;flex-shrink:0}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .4s cubic-bezier(.22,1,.36,1)}
.faq-answer-inner{overflow:hidden}
.faq-answer p{padding:0 0 26px 52px;color:var(--color-muted);max-width:72ch}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr;gap:40px}
.contact-info .section-index{margin-bottom:6px;display:block}
.contact-info h2{font-family:var(--font-serif);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:600;margin-bottom:16px}
.contact-info>p{color:var(--color-muted);max-width:46ch;margin-bottom:32px}
.contact-info ul{display:flex;flex-direction:column;gap:16px}
.contact-info li{display:flex;align-items:center;gap:12px;color:var(--color-ink)}
.contact-info li span{color:var(--color-accent);font-size:1.25rem}
.contact-note{margin-top:28px;padding:16px 20px;background:rgba(30,77,59,.06);border-left:3px solid var(--color-brand);border-radius:var(--radius-sm);color:var(--color-brand);font-size:.9375rem}
.contact-form{background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius-md);padding:32px;box-shadow:var(--shadow-sm)}
.form-field{margin-bottom:24px}
.form-field label{display:block;font-size:.8125rem;color:var(--color-muted);margin-bottom:6px}
.form-field label em{color:var(--color-error);font-style:normal}
.form-field input,.form-field textarea{width:100%;border:none;border-bottom:1px solid var(--color-line);background:transparent;padding:10px 2px;font-size:1rem;font-family:inherit;color:var(--color-ink);outline:none;transition:border-color .25s;border-radius:0}
.form-field textarea{resize:vertical;min-height:100px}
.form-field input:focus,.form-field textarea:focus{border-bottom-color:var(--color-accent)}
.form-field .field-error{display:none;font-size:.8125rem;color:var(--color-error);margin-top:6px}
.form-field.has-error input,.form-field.has-error textarea{border-bottom-color:var(--color-error)}
.form-field.has-error .field-error{display:block}
.form-success{display:none;margin-top:16px;padding:12px 16px;background:rgba(46,110,78,.1);color:var(--color-success);border-radius:var(--radius-sm);font-size:.875rem}
.form-success.show{display:block}
.form-tip{font-size:.8125rem;color:var(--color-muted);margin-top:14px}

/* Final CTA */
.final-cta{position:relative;padding:64px 0;color:#fff;overflow:hidden;background-color:var(--color-brand)}
.final-cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.25}
.final-cta-inner{position:relative;z-index:2;text-align:center}
.final-cta h2{font-family:var(--font-serif);font-size:clamp(1.8rem,3vw,2.75rem);font-weight:600;max-width:22em;margin:0 auto 16px}
.final-cta p{color:rgba(255,255,255,.75);margin-bottom:32px}
.final-cta .cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* Footer */
.site-footer{background:var(--color-bg);border-top:1px solid var(--color-line);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:40px;margin-bottom:48px}
.footer-brand .brand-name{color:var(--color-ink)}
.footer-brand p{color:var(--color-muted);font-size:.9375rem;margin-top:14px;max-width:30ch}
.footer-col h4{font-size:1rem;font-weight:600;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:var(--color-muted);font-size:.9375rem;transition:color .25s}
.footer-col a:hover{color:var(--color-brand)}
.footer-contact li{display:flex;gap:10px;color:var(--color-muted);font-size:.9375rem}
.footer-contact li span{color:var(--color-accent);flex-shrink:0}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--color-line);padding-top:24px;gap:16px;flex-wrap:wrap}
.footer-bottom p{color:var(--color-muted);font-size:.8125rem}
.back-to-top{width:40px;height:40px;border-radius:50%;border:1px solid var(--color-line);display:flex;align-items:center;justify-content:center;font-size:1rem;background:var(--color-surface);color:var(--color-brand);transition:background .3s,border-color .3s;flex-shrink:0}
.back-to-top:hover{background:var(--color-accent);border-color:var(--color-accent);color:var(--color-brand)}

/* Responsive */
@media (min-width:768px){
  .container{padding:0 32px}
  .section,.service-panel,.final-cta{padding:96px 0}
  .news-grid{grid-template-columns:1fr 1fr}
  .news-card-feature{grid-column:span 2;display:grid;grid-template-columns:1fr 1fr}
  .news-card-feature .news-media img{aspect-ratio:16/10;height:100%}
  .news-card-feature .news-body{display:flex;flex-direction:column;justify-content:center}
  .service-grid{grid-template-columns:repeat(4,1fr)}
  .contact-grid{grid-template-columns:1fr 1.1fr;gap:56px}
  .footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.3fr}
  .hero-deco{display:block}
}
@media (min-width:900px){
  .main-nav{display:block;margin-left:auto}
  .header-cta{display:inline-flex}
  .nav-toggle{display:none}
  .mobile-drawer{display:none !important}
}
@media (max-width:520px){
  .page-hero{padding-bottom:64px}
  .hero-metrics{gap:24px}
  .section-head{flex-direction:column;gap:8px}
  .contact-form{padding:24px}
  .service-item{padding:24px}
  .final-cta .cta-actions{flex-direction:column;align-items:center}
  .final-cta .btn{width:100%;max-width:280px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001s !important;transition-duration:.001s !important}
  html{scroll-behavior:auto}
}