/* roulang page: index */
:root {
  --primary: #12352F;
  --primary-dark: #0B201C;
  --primary-light: #E7EEE9;
  --accent: #C6A878;
  --accent-hover: #DDBF94;
  --bg: #F5F4F0;
  --card-bg: #FFFFFF;
  --text: #1F2825;
  --text-secondary: #56625E;
  --text-muted: #8A938F;
  --border: #E4E1D8;
  --dark-text: #F5F2E9;
  --dark-secondary: #A9B5AF;
  --radius-lg: 10px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 12px rgba(18,21,20,0.06);
  --shadow-hover: 0 14px 30px rgba(18,21,20,0.12);
  --shadow-nav: 0 2px 12px rgba(0,0,0,0.05);
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-num: "Inter", "DIN Alternate", sans-serif;
  --content-w: 1200px;
  --space-xxl: 96px;
  --space-xl: 72px;
  --space-lg: 48px;
  --space-md: 32px;
  --space-sm: 24px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color 0.3s var(--ease); }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
ul, ol { list-style: none; }
input, textarea, select, button { font-family: inherit; font-size: inherit; color: inherit; border: none; background: none; }
.container { max-width: var(--content-w); margin: 0 auto; padding: 0 20px; }
.section { padding: var(--space-xxl) 0; }
.section-tight { padding: var(--space-lg) 0; }
.section-head { margin-bottom: var(--space-lg); }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-label::before { content: ''; width: 24px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-title { font-size: 32px; font-weight: 700; line-height: 1.3; letter-spacing: 0.02em; color: var(--text); margin-bottom: 14px; }
.section-title.light { color: var(--dark-text); }
.section-desc { font-size: 16px; color: var(--text-secondary); max-width: 520px; }
.section-desc.light { color: var(--dark-secondary); }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary); transition: gap 0.3s var(--ease), color 0.3s var(--ease); }
.link-arrow:hover { gap: 10px; color: var(--accent); }
.link-arrow::after { content: '→'; font-size: 16px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: all 0.3s var(--ease);
  border: 1px solid transparent;
  line-height: 1.4;
}
.btn-primary { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--primary-dark); box-shadow: 0 8px 20px rgba(198,168,120,0.35); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--dark-text); border-color: rgba(255,255,255,0.8); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); border-color: var(--accent); color: var(--accent-hover); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--primary); box-shadow: var(--shadow-card); }
.btn-sm { padding: 8px 20px; min-height: 40px; font-size: 13px; }
.btn-block { width: 100%; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-pill);
  letter-spacing: 0.03em;
}
.badge-light { background: var(--primary-light); color: var(--primary); }
.badge-outline { background: transparent; border: 1px solid var(--accent); color: var(--accent); }
.badge-dark { background: rgba(255,255,255,0.1); color: var(--dark-text); border: 1px solid rgba(255,255,255,0.25); }
.tag-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--dark-text);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-pill);
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.62);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid rgba(255,255,255,0.3);
  box-shadow: none;
  transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.scrolled { background: #FFFFFF; box-shadow: var(--shadow-nav); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: baseline; flex-shrink: 0; }
.logo-main { font-size: 22px; font-weight: 700; letter-spacing: 0.02em; color: var(--primary); }
.logo-sub { font-size: 11px; font-weight: 400; color: var(--text-muted); margin-left: 8px; letter-spacing: 0.06em; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav > ul { display: flex; align-items: center; gap: 24px; }
.main-nav > ul a {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.02em;
  padding: 6px 2px;
  transition: color 0.3s var(--ease);
}
.main-nav > ul a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.3s var(--ease);
}
.main-nav > ul a:hover { color: var(--accent); }
.main-nav > ul a:hover::after { width: 100%; }
.main-nav > ul a.active { color: var(--primary); font-weight: 600; }
.main-nav > ul a.active::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  left: 50%;
  bottom: -6px;
  transform: translateX(-50%);
}
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-search { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); border-radius: var(--radius-sm); cursor: pointer; transition: color 0.3s var(--ease), background 0.3s var(--ease); }
.nav-search:hover { color: var(--accent); background: var(--primary-light); }
.hamburger { display: none; width: 44px; height: 44px; flex-direction: column; justify-content: center; align-items: center; gap: 6px; cursor: pointer; z-index: 120; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--primary); border-radius: 2px; transition: transform 0.3s var(--ease), opacity 0.3s var(--ease); }
body.menu-open .hamburger span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
body.menu-open .hamburger span:nth-child(2) { opacity: 0; }
body.menu-open .hamburger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background-color: var(--primary-dark);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(11,32,28,0.93) 25%, rgba(11,32,28,0.62) 60%, rgba(11,32,28,0.28) 100%);
  z-index: 1;
}
.hero-inner { position: relative; z-index: 2; width: 100%; padding-top: 140px; padding-bottom: 80px; }
.hero-badge { margin-bottom: 24px; }
.hero-title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--dark-text);
  max-width: 680px;
  text-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--dark-text);
  opacity: 0.9;
  max-width: 520px;
  margin-top: 20px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }
.hero-stats {
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.2);
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
}
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-family: var(--font-num); font-size: 46px; font-weight: 700; color: var(--accent); line-height: 1.2; }
.stat-num sup { font-size: 20px; font-weight: 600; color: var(--dark-secondary); }
.stat-label { font-size: 13px; letter-spacing: 0.04em; color: var(--dark-secondary); margin-top: 6px; }
.hero-anim { opacity: 0; transform: translateY(16px); animation: fadeUp 0.6s var(--ease) forwards; }
.hero-anim.delay-1 { animation-delay: 0.1s; }
.hero-anim.delay-2 { animation-delay: 0.2s; }
.hero-anim.delay-3 { animation-delay: 0.3s; }
.hero-anim.delay-4 { animation-delay: 0.4s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
.services-area { background: var(--bg); }
.services-layout .section-head { position: sticky; top: 120px; align-self: flex-start; }
.services-grid .card {
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}
.services-grid .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.service-icon { width: 48px; height: 48px; margin-bottom: 20px; color: var(--primary); transition: color 0.3s var(--ease); }
.services-grid .card:hover .service-icon { color: var(--accent); }
.service-title { font-size: 19px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.service-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; flex-grow: 1; }
.service-link { font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; transition: gap 0.3s var(--ease), color 0.3s var(--ease); }
.service-link:hover { gap: 8px; color: var(--accent); }
.stats-area {
  position: relative;
  background: var(--primary-dark);
  overflow: hidden;
}
.stats-area::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 400px;
  height: 400px;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 50%;
}
.stats-area::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 500px;
  height: 500px;
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: 50%;
}
.stats-area .container { position: relative; z-index: 2; }
.stats-area .section-head { text-align: center; }
.stats-area .section-label { justify-content: center; }
.stats-grid { margin-top: var(--space-lg); }
.stat-card { text-align: center; padding: 24px 16px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: var(--radius-lg); transition: background 0.3s var(--ease); }
.stat-card:hover { background: rgba(255,255,255,0.08); }
.stat-card .stat-num { font-size: 52px; }
.stat-card .stat-num sup { font-size: 22px; color: var(--dark-secondary); }
.stat-card .stat-label { margin-top: 10px; font-size: 14px; }
.cases-area { background: var(--bg); }
.cases-head { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-bottom: var(--space-lg); }
.cases-grid .cell { margin-bottom: 24px; }
.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.cases-grid .cell.middle { margin-top: 24px; }
.case-thumb { position: relative; overflow: hidden; aspect-ratio: 16/10; background: var(--primary-light); }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.case-card:hover .case-thumb img { transform: scale(1.05); }
.case-badge { position: absolute; top: 14px; left: 14px; }
.case-body { padding: 24px; display: flex; flex-direction: column; flex-grow: 1; }
.case-title { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 10px; transition: color 0.3s var(--ease); }
.case-title:hover { color: var(--accent); }
.case-excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.65; margin-bottom: 16px; flex-grow: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.case-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-muted); }
.case-read { font-weight: 600; color: var(--primary); transition: color 0.3s var(--ease); }
.case-read:hover { color: var(--accent); }
.updates-area { background: var(--bg); }
.updates-head { display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-bottom: var(--space-lg); }
.update-card {
  display: flex;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
  height: auto;
}
.update-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.update-thumb { flex-shrink: 0; width: 130px; height: 92px; border-radius: var(--radius-sm); overflow: hidden; background: var(--primary-light); }
.update-thumb img { width: 100%; height: 100%; object-fit: cover; }
.update-content { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.badge-simple { display: inline-block; padding: 3px 10px; font-size: 12px; font-weight: 500; background: var(--primary-light); color: var(--primary); border-radius: var(--radius-pill); margin-bottom: 8px; align-self: flex-start; }
.update-title { font-size: 16px; font-weight: 600; line-height: 1.4; color: var(--text); margin-bottom: 6px; }
.update-title a:hover { color: var(--accent); }
.update-excerpt { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex-grow: 1; }
.update-meta { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-muted); }
.read-link { color: var(--primary); font-weight: 600; transition: color 0.3s var(--ease); }
.read-link:hover { color: var(--accent); }
.empty-state {
  background: var(--card-bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 64px 32px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 40px; display: block; margin-bottom: 12px; opacity: 0.5; }
.empty-state p { font-size: 15px; letter-spacing: 0.02em; }
.process-area { background: var(--bg); }
.process-step { position: relative; padding: 0 20px 0 0; }
.process-step .step-line { width: 24px; height: 2px; background: var(--accent); margin-bottom: 20px; }
.process-step .step-num { font-family: var(--font-num); font-size: 48px; font-weight: 700; color: var(--accent); line-height: 1.1; margin-bottom: 14px; }
.process-step .step-name { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 10px; }
.process-step .step-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }
.process-connect { position: absolute; top: 40px; left: -15px; right: 20px; height: 1px; background: var(--border); z-index: 0; }
.faq-area { background: var(--bg); }
.faq-left .section-title { font-size: 30px; }
.faq-help { margin-top: 24px; padding-top: 24px; border-top: 1px solid var(--border); }
.faq-help p { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; }
.accordion { background: transparent; margin: 0; }
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: none;
  transition: box-shadow 0.3s var(--ease);
  border-left: 4px solid var(--primary);
}
.accordion-item:hover { box-shadow: var(--shadow-card); }
.accordion-item.is-active { border-left-color: var(--accent); box-shadow: var(--shadow-card); }
.accordion-title {
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.3s var(--ease);
}
.accordion-title:hover { color: var(--accent); background: var(--card-bg); }
.accordion-title::after { content: '+'; font-size: 22px; font-weight: 400; color: var(--accent); transition: transform 0.3s var(--ease); line-height: 1; }
.accordion-item.is-active .accordion-title::after { transform: rotate(45deg); }
.accordion-content {
  padding: 0 20px 20px;
  background: #F9F8F5;
  border-top: none;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}
.accordion-content p { margin-bottom: 0; color: var(--text-secondary); }
.contact-area { background: var(--bg); }
.contact-card {
  background: linear-gradient(135deg, #FFFFFF 0%, #FAF9F6 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.contact-info { padding: 48px 40px; }
.contact-info .section-title { font-size: 28px; }
.contact-info .section-desc { margin-bottom: 32px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 24px; align-items: flex-start; }
.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-size: 18px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.contact-item:hover .contact-icon { background: var(--accent); color: var(--primary-dark); }
.contact-item h4 { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.contact-item p { font-size: 14px; color: var(--text-secondary); }
.contact-form-card { padding: 40px 40px 32px; background: var(--card-bg); border-top: 1px solid var(--border); }
.contact-form .form-group { margin-bottom: 18px; }
.contact-form input[type="text"],
.contact-form input[type="tel"],
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 16px;
  background: #F9F8F5;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.contact-form textarea { min-height: 110px; resize: vertical; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(198,168,120,0.15);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-muted); }
.form-note { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 12px; }
.footer-site {
  background: var(--primary-dark);
  color: var(--dark-text);
  padding-top: 72px;
}
.footer-grid { padding-bottom: 48px; }
.footer-col .footer-logo { font-size: 22px; font-weight: 700; color: var(--dark-text); margin-bottom: 4px; }
.footer-col .footer-logo span { font-size: 11px; font-weight: 400; color: var(--dark-secondary); margin-left: 8px; }
.footer-about { font-size: 14px; line-height: 1.7; color: var(--dark-secondary); margin-top: 16px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  color: var(--dark-text);
  font-size: 15px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
.footer-title { font-size: 16px; font-weight: 600; color: var(--dark-text); margin-bottom: 20px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: var(--dark-secondary); transition: color 0.3s var(--ease); }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { display: flex; gap: 12px; font-size: 14px; color: var(--dark-secondary); margin-bottom: 16px; }
.footer-contact i { color: var(--accent); margin-top: 5px; }
.footer-subscribe p { font-size: 14px; color: var(--dark-secondary); margin-bottom: 16px; }
.subscribe-form { display: flex; gap: 10px; flex-wrap: wrap; }
.subscribe-form input[type="email"] {
  flex: 1;
  min-width: 180px;
  min-height: 46px;
  padding: 0 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-sm);
  color: var(--dark-text);
  font-size: 14px;
  transition: border-color 0.3s var(--ease);
}
.subscribe-form input:focus { outline: none; border-color: var(--accent); }
.subscribe-form .btn { min-height: 46px; }
.footer-bottom {
  background: rgba(0,0,0,0.25);
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--dark-secondary); }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--dark-secondary); transition: color 0.3s var(--ease); }
.footer-bottom-links a:hover { color: var(--accent); }
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .hero-title { font-size: 42px; }
  .main-nav { gap: 16px; }
  .main-nav > ul { gap: 16px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-title { font-size: 24px; }
  .hero-title { font-size: 34px; }
  .hero-subtitle { font-size: 16px; }
  .hero-stats { gap: 24px; }
  .stat-num { font-size: 36px; }
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-dark);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 80px 40px;
    z-index: 110;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s var(--ease), visibility 0.35s var(--ease);
    gap: 0;
  }
  body.menu-open .main-nav { opacity: 1; visibility: visible; }
  .main-nav > ul { flex-direction: column; align-items: flex-start; gap: 20px; }
  .main-nav > ul a { font-size: 20px; color: var(--dark-text); }
  .main-nav > ul a::after { background: var(--accent); }
  .main-nav > ul a.active { color: var(--accent); }
  .main-nav > ul a.active::before { background: var(--accent); }
  .nav-actions { flex-direction: column; align-items: flex-start; margin-top: 30px; gap: 20px; }
  .nav-search { color: var(--dark-text); width: auto; padding: 0 4px; }
  .hamburger { display: flex; }
  .services-layout .section-head { position: static; }
  .cases-grid .cell { margin-bottom: 20px; }
  .update-card { flex-direction: column; }
  .update-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
  .contact-info { padding: 32px 24px; }
  .contact-form-card { padding: 28px 24px; }
  .footer-grid .cell { margin-bottom: 32px; }
  .process-connect { display: none; }
  .process-step { padding-left: 24px; margin-bottom: 32px; border-left: 2px solid var(--accent); }
  .process-step .step-line { display: none; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .hero { min-height: 90vh; }
  .hero-inner { padding-top: 120px; padding-bottom: 60px; }
  .hero-title { font-size: 34px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .header-inner { height: 64px; }
  .logo-main { font-size: 18px; }
  .logo-sub { font-size: 10px; }
  .btn { width: 100%; }
  .btn-sm { width: auto; }
  .nav-actions .btn { width: 100%; }
  .cases-head { flex-direction: column; align-items: flex-start; }
  .updates-head { flex-direction: column; align-items: flex-start; }
  .stat-card { padding: 20px 12px; }
  .footer-bottom-inner { flex-direction: column; justify-content: center; text-align: center; }
  .footer-bottom-links { justify-content: center; flex-wrap: wrap; }
}
@media (min-width: 641px) and (max-width: 1024px) {
  .services-grid .cell { flex: 0 0 50%; max-width: 50%; }
  .cases-grid .cell { flex: 0 0 50%; max-width: 50%; }
  .footer-grid .cell { flex: 0 0 50%; max-width: 50%; }
}

/* roulang page: category1 */
:root {
  --primary: #12352F;
  --primary-dark: #0B201C;
  --primary-light: #E7EEE9;
  --accent: #C6A878;
  --accent-hover: #DDBF94;
  --bg: #F5F4F0;
  --card-bg: #FFFFFF;
  --text: #1F2825;
  --text-secondary: #56625E;
  --text-muted: #8A938F;
  --border: #E4E1D8;
  --dark-text: #F5F2E9;
  --dark-text-secondary: #A9B5AF;
  --faq-bg: #F9F8F5;
  --radius-lg: 10px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 12px rgba(18, 21, 20, 0.06);
  --shadow-hover: 0 14px 30px rgba(18, 21, 20, 0.12);
  --shadow-nav: 0 2px 12px rgba(0, 0, 0, 0.05);
  --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-en: "Inter", "DIN Alternate", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:visited { color: var(--text-secondary); }
a:visited:hover { color: var(--accent); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 96px 0; }

/* header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.site-header.scrolled {
  background: #FFFFFF;
  box-shadow: var(--shadow-nav);
  border-bottom-color: var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-main {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.02em;
}
.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: 2px;
}
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav ul { display: flex; align-items: center; gap: 24px; margin: 0; list-style: none; }
.main-nav ul li a {
  position: relative;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--text);
  padding: 6px 2px;
  transition: color var(--transition);
}
.main-nav ul li a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.main-nav ul li a:hover::after,
.main-nav ul li a.active::after { width: 100%; }
.main-nav ul li a.active { color: var(--primary); font-weight: 600; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-search {
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  transition: all var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.nav-search:hover { border-color: var(--accent); color: var(--accent); }
.nav-toggler {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--primary);
  font-size: 18px;
  align-items: center; justify-content: center;
}
.mobile-nav {
  display: none;
  background: var(--primary-dark);
  padding: 24px 0;
}
.mobile-nav.open { display: block; }
.mobile-nav ul { list-style: none; padding: 0 24px; }
.mobile-nav ul li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.mobile-nav ul li a {
  color: var(--dark-text);
  font-size: 18px;
  display: block;
  padding: 6px 0;
}
.mobile-nav ul li a.active { color: var(--accent); }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  text-decoration: none;
  line-height: 1.4;
  white-space: nowrap;
}
.btn:focus-visible, .nav-search:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--primary-dark); box-shadow: 0 6px 18px rgba(198,168,120,0.35); }
.btn-primary:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--dark-text); border-color: rgba(255,255,255,0.6); }
.btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: #FFFFFF; color: #FFFFFF; }
.btn-ghost-light { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-ghost-light:hover { background: var(--primary); color: var(--dark-text); }
.btn-sm { padding: 8px 18px; font-size: 13px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }

/* hero */
.category-hero {
  position: relative;
  background: var(--primary-dark);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 180px 0 96px;
  min-height: 480px;
  display: flex;
  align-items: center;
}
.category-hero::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(11,32,28,0.95) 30%, rgba(11,32,28,0.75) 65%, rgba(11,32,28,0.45) 100%);
}
.category-hero-inner { position: relative; z-index: 2; max-width: 720px; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--dark-text-secondary);
  margin-bottom: 32px;
}
.breadcrumb span.sep { color: var(--accent); }
.breadcrumb a { color: var(--dark-text-secondary); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .current { color: var(--dark-text); }
.hero-badge {
  display: inline-block;
  padding: 5px 16px;
  border: 1px solid var(--accent);
  border-radius: var(--radius-pill);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 24px;
}
.category-hero h1 {
  font-size: 44px;
  font-weight: 700;
  color: var(--dark-text);
  letter-spacing: 0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
  border-left: 3px solid var(--accent);
  padding-left: 20px;
}
.category-hero p {
  font-size: 16px;
  color: var(--dark-text-secondary);
  line-height: 1.75;
  max-width: 620px;
}
.hero-anim { animation: heroIn 0.6s ease both; }
.hero-anim:nth-child(1) { animation-delay: 0.1s; }
.hero-anim:nth-child(2) { animation-delay: 0.2s; }
.hero-anim:nth-child(3) { animation-delay: 0.3s; }
@keyframes heroIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* feature band */
.feature-band {
  background: var(--primary);
  padding: 48px 0;
}
.feature-band .grid-x { align-items: center; }
.feature-item { display: flex; align-items: flex-start; gap: 16px; padding: 12px 0; }
.feature-item .icon {
  width: 44px; height: 44px;
  border-radius: 8px;
  background: rgba(198,168,120,0.15);
  color: var(--accent);
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.feature-item h3 { font-size: 17px; color: var(--dark-text); font-weight: 600; letter-spacing: 0.02em; }
.feature-item p { font-size: 13px; color: var(--dark-text-secondary); margin: 4px 0 0; line-height: 1.5; }

/* section head */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.section-tag::before {
  content: "";
  width: 24px; height: 2px;
  background: var(--accent);
}
.section-title { font-size: 32px; font-weight: 700; color: var(--text); letter-spacing: 0.02em; line-height: 1.3; }
.section-link { font-size: 15px; color: var(--primary); font-weight: 500; transition: color var(--transition); }
.section-link:hover { color: var(--accent); }
.section-link:hover span { transform: translateX(4px); }
.section-link span { display: inline-block; transition: transform var(--transition); }

/* cards */
.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.card-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--primary-light);
  background-image: linear-gradient(135deg, #12352F 0%, #2b5b52 100%);
}
.card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.card:hover .card-img img { transform: scale(1.05); }
.card-body { padding: 28px; }
.card-badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  transition: background var(--transition), color var(--transition);
}
.card:hover .card-badge { background: var(--accent); color: var(--primary-dark); }
.card-body h3 { font-size: 20px; font-weight: 600; color: var(--text); line-height: 1.4; margin-bottom: 10px; }
.card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 18px; }
.card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: var(--text-muted); border-top: 1px solid var(--border); padding-top: 16px; }
.card-link { color: var(--primary); font-weight: 500; font-size: 14px; }
.card-link:hover { color: var(--accent); }
.featured-card .card-img { aspect-ratio: 16 / 7; }
.spacer-col { display: block; content: ""; }

/* insight section */
.insight-section { background: var(--bg); }
.insight-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
.insight-item {
  display: flex;
  gap: 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.insight-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); border-color: var(--accent); }
.insight-thumb {
  width: 180px; height: 126px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
}
.insight-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.insight-item:hover .insight-thumb img { transform: scale(1.05); }
.insight-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.insight-body .card-badge { margin-bottom: 8px; }
.insight-body h3 { font-size: 18px; font-weight: 600; color: var(--text); line-height: 1.45; margin-bottom: 6px; }
.insight-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 8px; }
.insight-meta { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }

/* process */
.process-section { background: var(--dark-text); }
.process-section .section-tag { color: var(--accent); }
.process-section .section-title { color: var(--dark-text); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 56px; position: relative; }
.process-step { position: relative; padding-left: 0; }
.process-step::before {
  content: "";
  position: absolute;
  top: 12px; left: -12px;
  width: calc(100% - 20px);
  height: 1px;
  background: rgba(198,168,120,0.25);
  z-index: 0;
}
.process-step:first-child::before { display: none; }
.process-step .step-num {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 48px;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  background: var(--dark-text);
  padding-right: 12px;
}
.process-step .step-line {
  display: block;
  width: 24px; height: 2px;
  background: var(--accent);
  margin-bottom: 20px;
}
.process-step h3 { font-size: 18px; font-weight: 600; color: var(--dark-text); margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--dark-text-secondary); line-height: 1.6; }

/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: start; }
.faq-title-block h2 { font-size: 32px; font-weight: 700; color: var(--text); margin-bottom: 16px; line-height: 1.3; }
.faq-title-block p { font-size: 15px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 24px; }
.faq-contact { font-size: 15px; color: var(--text-secondary); }
.faq-contact a { color: var(--accent); font-weight: 600; }
.accordion {
  border: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--primary);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.accordion-item:hover { box-shadow: var(--shadow-card); }
.accordion-item.is-active { border-left-color: var(--accent); box-shadow: var(--shadow-card); }
.accordion-title {
  width: 100%;
  padding: 20px 22px;
  background: var(--card-bg);
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--transition);
}
.accordion-title:hover { color: var(--accent); }
.accordion-title .faq-icon { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.accordion-title .faq-icon::before,
.accordion-title .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform var(--transition);
  top: 50%; left: 50%;
}
.accordion-title .faq-icon::before { width: 16px; height: 2px; transform: translate(-50%, -50%); }
.accordion-title .faq-icon::after { width: 2px; height: 16px; transform: translate(-50%, -50%); }
.accordion-item.is-active .accordion-title .faq-icon::after { transform: translate(-50%, -50%) scaleY(0); }
.accordion-content {
  display: none;
  padding: 0 22px 20px;
  background: var(--faq-bg);
}
.accordion-item.is-active .accordion-content { display: block; animation: fadeIn 0.3s ease; }
.accordion-content p { font-size: 15px; color: var(--text-secondary); line-height: 1.75; padding-top: 16px; border-top: 1px solid var(--border); }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* cta strip */
.cta-strip {
  background: var(--primary);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.cta-strip::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(198,168,120,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.cta-strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; position: relative; z-index: 1; }
.cta-strip h2 { font-size: 28px; font-weight: 700; color: var(--dark-text); letter-spacing: 0.02em; margin-bottom: 10px; }
.cta-strip p { font-size: 15px; color: var(--dark-text-secondary); }
.cta-strip .btn { flex-shrink: 0; }

/* footer */
.footer-site { background: var(--primary-dark); color: var(--dark-text-secondary); padding-top: 72px; }
.footer-grid { padding-bottom: 56px; border-bottom: 1px solid rgba(255,255,255,0.08); margin-bottom: 28px; }
.footer-col h4.footer-title { color: var(--dark-text); font-size: 15px; font-weight: 600; margin-bottom: 20px; letter-spacing: 0.04em; }
.footer-logo { font-size: 20px; font-weight: 700; color: var(--dark-text); }
.footer-logo span { display: block; font-size: 11px; color: var(--dark-text-secondary); margin-top: 4px; letter-spacing: 0.04em; }
.footer-about { font-size: 14px; line-height: 1.7; color: var(--dark-text-secondary); margin: 18px 0 20px; max-width: 320px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--dark-text-secondary);
  transition: all var(--transition);
}
.footer-social a:hover { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }
.footer-links { list-style: none; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a, .footer-bottom-links a { color: var(--dark-text-secondary); font-size: 14px; transition: color var(--transition); }
.footer-links a:hover, .footer-bottom-links a:hover { color: var(--accent); }
.footer-contact { list-style: none; margin: 0; }
.footer-contact li { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 14px; }
.footer-contact i { color: var(--accent); width: 18px; text-align: center; }
.footer-subscribe p { font-size: 13px; color: var(--dark-text-secondary); margin-bottom: 16px; line-height: 1.6; }
.subscribe-form input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-sm);
  color: var(--dark-text);
  font-size: 14px;
  margin-bottom: 12px;
  transition: border-color var(--transition);
}
.subscribe-form input:focus { outline: none; border-color: var(--accent); }
.subscribe-form input::placeholder { color: rgba(255,255,255,0.3); }
.subscribe-form .btn { width: 100%; }
.footer-bottom { padding: 24px 0 32px; }
.footer-bottom-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { font-size: 13px; }

/* responsive */
@media screen and (max-width: 1024px) {
  .content-grid { grid-template-columns: 1fr; gap: 24px; }
  .faq-grid { grid-template-columns: 1fr; gap: 40px; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 40px 32px; }
  .process-step::before { display: none; }
  .category-hero h1 { font-size: 34px; }
  .section-title { font-size: 26px; }
}
@media screen and (max-width: 768px) {
  .section { padding: 64px 0; }
  .main-nav { display: none; }
  .nav-toggler { display: flex; }
  .nav-actions .nav-search { display: none; }
  .footer-grid { gap: 32px; }
  .cta-strip-inner { flex-direction: column; align-items: flex-start; }
}
@media screen and (max-width: 640px) {
  .container { padding: 0 16px; }
  .category-hero { padding: 140px 0 64px; min-height: 400px; }
  .category-hero h1 { font-size: 28px; line-height: 1.25; }
  .category-hero p { font-size: 15px; }
  .section-title { font-size: 22px; }
  .content-grid { grid-template-columns: 1fr; gap: 20px; }
  .card-body { padding: 20px; }
  .card-body h3 { font-size: 18px; }
  .insight-item { flex-direction: column; gap: 16px; padding: 16px; }
  .insight-thumb { width: 100%; height: 180px; }
  .process-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-strip { padding: 48px 0; }
  .cta-strip h2 { font-size: 22px; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .section-link { font-size: 14px; }
  .feature-band { padding: 32px 0; }
  .feature-item { padding: 10px 0; }
  .footer-links a, .footer-contact li { font-size: 14px; }
}

/* roulang page: article */
:root {
  --ink: #12352F;
  --ink-deep: #0B201C;
  --ink-soft: #E7EEE9;
  --gold: #C6A878;
  --gold-bright: #DDBF94;
  --bg: #F5F4F0;
  --card: #FFFFFF;
  --text: #1F2825;
  --text-sub: #56625E;
  --text-mute: #8A938F;
  --border: #E4E1D8;
  --dark-text: #F5F2E9;
  --dark-sub: #A9B5AF;
  --radius-lg: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 2px 12px rgba(18,21,20,0.06);
  --shadow-hover: 0 14px 30px rgba(18,21,20,0.12);
  --transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-num: "Inter", "DIN Alternate", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--ink); text-decoration: none; transition: color var(--transition); }
a:visited { color: var(--ink); }
a:hover { color: var(--gold); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 15px; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.grid-x { margin-left: -15px; margin-right: -15px; }
.grid-margin-x > .cell { padding-left: 15px; padding-right: 15px; }
::selection { background: var(--gold); color: var(--ink-deep); }

/* ========== 导航 ========== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.62);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-bottom: 1px solid rgba(255,255,255,0.3);
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled { background: #FFFFFF; box-shadow: 0 6px 24px rgba(18,21,20,0.08); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.brand { display: flex; flex-direction: column; line-height: 1.2; flex-shrink: 0; }
.brand-main { font-size: 22px; font-weight: 700; color: var(--ink); letter-spacing: 0.02em; }
.brand-sub { font-size: 10px; color: var(--text-mute); letter-spacing: 0.08em; margin-top: 2px; }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav ul { display: flex; list-style: none; gap: 24px; margin: 0; }
.main-nav ul li { margin: 0; }
.main-nav ul a {
  position: relative; font-size: 14px; letter-spacing: 0.04em; color: var(--text);
  padding: 6px 2px; font-weight: 500;
}
.main-nav ul a::after {
  content: ""; position: absolute; left: 50%; bottom: 1px;
  width: 0; height: 2px; background: var(--gold);
  transform: translateX(-50%); transition: width var(--transition);
}
.main-nav ul a:hover::after, .main-nav ul a.active::after { width: 100%; }
.main-nav ul a.active { color: var(--ink); }
.main-nav ul a.active::before {
  content: ""; display: inline-block; width: 5px; height: 5px;
  border-radius: 50%; background: var(--gold);
  margin-right: 4px; vertical-align: middle;
}
.nav-actions { display: flex; align-items: center; gap: 16px; }
.nav-search {
  width: 38px; height: 38px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text); font-size: 15px;
  transition: background var(--transition), color var(--transition);
}
.nav-search:hover { background: var(--ink-soft); color: var(--ink); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); font-weight: 600; font-size: 15px;
  padding: 12px 28px; letter-spacing: 0.02em;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  text-decoration: none; line-height: 1.4;
}
.btn:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.btn-primary { background: var(--gold); color: var(--ink-deep); box-shadow: 0 4px 14px rgba(198,168,120,0.3); }
.btn-primary:hover { background: var(--gold-bright); color: var(--ink-deep); box-shadow: 0 6px 20px rgba(198,168,120,0.45); transform: translateY(-2px); }
.btn-outline { background: transparent; border: 1px solid rgba(255,255,255,0.7); color: var(--dark-text); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== 文章页头 ========== */
.article-hero {
  background: var(--ink-deep);
  padding: 148px 0 72px;
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: ""; position: absolute; top: 0; right: 0; bottom: 0; left: 0;
  background:
    linear-gradient(90deg, rgba(198,168,120,0.04) 1px, transparent 1px),
    linear-gradient(rgba(198,168,120,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.article-hero::after {
  content: ""; position: absolute; top: -120px; right: -80px;
  width: 360px; height: 360px; border-radius: 50%;
  background: radial-gradient(circle, rgba(198,168,120,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.breadcrumb {
  font-size: 13px; color: var(--dark-sub); letter-spacing: 0.03em;
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 28px;
}
.breadcrumb a { color: var(--dark-sub); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb span { color: var(--gold); }
.article-category-badge {
  display: inline-block; padding: 4px 18px; border-radius: 999px;
  border: 1px solid var(--gold); color: var(--gold);
  font-size: 13px; letter-spacing: 0.06em; font-weight: 500;
  margin-bottom: 20px;
}
.article-hero h1 {
  color: var(--dark-text); font-size: 36px; font-weight: 700;
  line-height: 1.35; letter-spacing: 0.02em; max-width: 800px;
  margin-bottom: 22px;
}
.article-meta {
  display: flex; flex-wrap: wrap; gap: 24px;
  color: var(--dark-sub); font-size: 14px;
}
.article-meta i { margin-right: 6px; color: var(--gold); }

/* ========== 正文阅读区 ========== */
.article-body-section { padding: 56px 0 24px; }
.article-card {
  background: var(--card); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card); border: 1px solid var(--border);
  max-width: 860px; margin: 0 auto;
  padding: 56px 64px;
}
.article-body { font-size: 16px; line-height: 1.75; color: var(--text); }
.article-body h2 {
  font-size: 26px; font-weight: 700; color: var(--ink);
  margin: 40px 0 18px; padding-top: 16px; position: relative;
  letter-spacing: 0.02em;
}
.article-body h2::before {
  content: ""; display: block; width: 40px; height: 3px;
  background: var(--gold); border-radius: 2px; margin-bottom: 14px;
}
.article-body h3 { font-size: 20px; font-weight: 600; color: var(--ink); margin: 28px 0 12px; }
.article-body h4 { font-size: 17px; font-weight: 600; color: var(--ink); margin: 20px 0 10px; }
.article-body p { margin-bottom: 18px; color: var(--text); }
.article-body a { color: var(--gold); text-decoration: underline; text-decoration-color: rgba(198,168,120,0.4); text-underline-offset: 3px; transition: color var(--transition); }
.article-body a:hover { color: var(--gold-bright); }
.article-body ul, .article-body ol { margin: 0 0 18px 24px; padding: 0; }
.article-body li { margin-bottom: 8px; color: var(--text); }
.article-body li::marker { color: var(--gold); }
.article-body blockquote {
  border-left: 3px solid var(--gold); background: var(--ink-soft);
  padding: 18px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-sub); font-style: normal;
}
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-body table th, .article-body table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.article-body table th { background: var(--ink-soft); color: var(--ink); font-weight: 600; }
.article-body table tr:nth-child(even) { background: #FAFAF8; }
.article-body img {
  width: 100%; border-radius: 8px; border: 1px solid var(--border);
  margin: 24px 0;
}
.article-body hr { border: none; border-top: 1px solid var(--border); margin: 36px 0; }
.article-body strong { font-weight: 600; color: var(--ink); }
.article-not-found { text-align: center; padding: 60px 20px; }
.article-not-found i { font-size: 48px; color: var(--text-mute); margin-bottom: 18px; display: block; }
.article-not-found p { font-size: 18px; color: var(--text-sub); margin-bottom: 28px; }

/* ========== 文末信息区 ========== */
.article-end-section { padding: 24px 0 0; }
.article-end-inner {
  max-width: 860px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 20px;
  padding-bottom: 36px; border-bottom: 1px solid var(--border);
}
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-item {
  display: inline-block; padding: 4px 14px; border-radius: 999px;
  background: var(--ink-soft); color: var(--ink); font-size: 13px;
  letter-spacing: 0.04em; transition: background var(--transition), color var(--transition);
}
.tag-item:hover { background: var(--gold); color: var(--ink-deep); }
.article-share { display: flex; align-items: center; gap: 8px; color: var(--text-sub); font-size: 14px; }
.share-btn {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); color: var(--text-sub);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.share-btn:hover { background: var(--ink); color: var(--dark-text); border-color: var(--ink); }

/* ========== 上一篇/下一篇 ========== */
.article-prev-next { padding: 32px 0 16px; }
.prev-next-inner {
  max-width: 860px; margin: 0 auto;
  display: flex; justify-content: space-between; gap: 24px;
}
.prev-link, .next-link {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px; border: 1px solid var(--border);
  border-radius: var(--radius-lg); background: var(--card);
  font-size: 15px; color: var(--text); transition: all var(--transition);
  box-shadow: var(--shadow-card);
}
.prev-link:hover, .next-link:hover {
  border-color: var(--gold); color: var(--ink);
  box-shadow: var(--shadow-hover); transform: translateY(-2px);
}
.prev-link i { color: var(--gold); }
.next-link i { color: var(--gold); }

/* ========== 相关推荐 ========== */
.related-posts { padding: 64px 0 80px; }
.related-posts .section-head {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 40px;
}
.related-posts .section-title { font-size: 30px; font-weight: 700; color: var(--ink); letter-spacing: 0.02em; }
.related-posts .section-sub { font-size: 14px; color: var(--text-sub); }
.related-card {
  background: var(--card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); overflow: hidden;
  box-shadow: var(--shadow-card); height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex; flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-hover);
  border-color: var(--gold);
}
.related-thumb { height: 180px; overflow: hidden; position: relative; background: var(--ink-soft); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-body { padding: 20px 22px 24px; display: flex; flex-direction: column; flex: 1; }
.related-body .badge {
  display: inline-block; padding: 3px 14px; border-radius: 999px;
  background: var(--ink-soft); color: var(--ink); font-size: 12px;
  letter-spacing: 0.05em; margin-bottom: 10px; width: fit-content;
}
.related-body h3 { font-size: 18px; font-weight: 600; color: var(--text); line-height: 1.5; margin-bottom: 8px; transition: color var(--transition); }
.related-card:hover .related-body h3 { color: var(--ink); }
.related-body .date { font-size: 13px; color: var(--text-mute); margin-top: auto; display: flex; align-items: center; gap: 6px; }
.related-body .date i { color: var(--gold); }

/* ========== CTA 条 ========== */
.cta-strip {
  background: var(--ink-deep); padding: 64px 0;
  position: relative; overflow: hidden;
}
.cta-strip::before {
  content: ""; position: absolute; top: -80px; left: 20%;
  width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(198,168,120,0.1) 0%, transparent 70%);
}
.cta-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 32px; position: relative; z-index: 1;
}
.cta-inner h2 { color: var(--dark-text); font-size: 28px; font-weight: 700; letter-spacing: 0.02em; }
.cta-inner p { color: var(--dark-sub); font-size: 15px; margin-top: 8px; }
.cta-inner .btn { flex-shrink: 0; }

/* ========== 页脚 ========== */
.footer-site { background: var(--ink-deep); color: var(--dark-sub); padding-top: 72px; }
.footer-grid { margin-bottom: 48px; }
.footer-col { padding: 0 10px; }
.footer-logo {
  font-size: 22px; font-weight: 700; color: var(--dark-text);
  display: flex; flex-direction: column; line-height: 1.3; letter-spacing: 0.02em;
}
.footer-logo span { font-size: 11px; color: var(--dark-sub); font-weight: 400; margin-top: 4px; letter-spacing: 0.08em; }
.footer-about { font-size: 14px; line-height: 1.7; color: var(--dark-sub); margin: 16px 0 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  color: var(--dark-sub); font-size: 14px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.footer-social a:hover { background: var(--gold); color: var(--ink-deep); border-color: var(--gold); }
.footer-title { font-size: 15px; font-weight: 600; color: var(--dark-text); margin-bottom: 20px; letter-spacing: 0.03em; }
.footer-links { list-style: none; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--dark-sub); font-size: 14px; transition: color var(--transition), padding-left var(--transition); }
.footer-links a:hover { color: var(--gold); padding-left: 4px; }
.footer-contact { list-style: none; margin: 0; }
.footer-contact li { font-size: 14px; color: var(--dark-sub); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: var(--gold); width: 16px; text-align: center; }
.footer-subscribe p { font-size: 14px; color: var(--dark-sub); margin-bottom: 14px; }
.subscribe-form { display: flex; gap: 8px; }
.subscribe-form input {
  flex: 1; min-width: 0; background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-sm);
  padding: 10px 16px; color: var(--dark-text); font-size: 14px;
  transition: border-color var(--transition), background var(--transition);
}
.subscribe-form input::placeholder { color: rgba(255,255,255,0.4); }
.subscribe-form input:focus { outline: none; border-color: var(--gold); background: rgba(255,255,255,0.12); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; }
.footer-bottom-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom-inner span { font-size: 13px; color: var(--dark-sub); }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { font-size: 13px; color: var(--dark-sub); transition: color var(--transition); }
.footer-bottom-links a:hover { color: var(--gold); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .main-nav { gap: 16px; }
  .main-nav ul { gap: 14px; }
  .article-hero { padding: 130px 0 56px; }
  .article-hero h1 { font-size: 30px; }
  .article-card { padding: 40px 32px; }
}
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0;
    background: var(--ink-deep);
    flex-direction: column; align-items: flex-start;
    padding: 24px 24px 36px;
    transform: translateY(-120%); opacity: 0;
    transition: transform 0.4s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.3s;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    gap: 24px; z-index: 99;
  }
  .main-nav.open { transform: translateY(0); opacity: 1; }
  .main-nav ul { flex-direction: column; gap: 18px; width: 100%; }
  .main-nav ul a { color: var(--dark-text); font-size: 18px; padding: 4px 0; }
  .main-nav ul a::after { display: none; }
  .main-nav ul a.active { color: var(--gold); }
  .main-nav ul a.active::before { display: none; }
  .nav-actions { width: 100%; justify-content: space-between; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1); }
  .nav-search { color: var(--dark-text); }
  .article-hero { padding: 110px 0 48px; }
  .article-hero h1 { font-size: 26px; }
  .article-card { padding: 28px 20px; border-radius: 8px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 22px; }
  .article-end-inner { flex-direction: column; align-items: flex-start; }
  .prev-next-inner { flex-direction: column; }
  .related-posts .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
  .footer-bottom-links { justify-content: center; }
}
@media (max-width: 520px) {
  .article-meta { flex-direction: column; gap: 8px; }
  .article-meta span { font-size: 13px; }
  .btn { padding: 12px 20px; font-size: 14px; }
  .related-thumb { height: 160px; }
  .subscribe-form { flex-direction: column; }
  .subscribe-form .btn { width: 100%; }
}

/* ========== 动效 ========== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.article-hero .breadcrumb,
.article-hero .article-category-badge,
.article-hero h1,
.article-hero .article-meta {
  animation: fadeUp 0.6s cubic-bezier(0.25, 0.1, 0.25, 1) both;
}
.article-hero .article-category-badge { animation-delay: 0.1s; }
.article-hero h1 { animation-delay: 0.2s; }
.article-hero .article-meta { animation-delay: 0.3s; }