/* roulang page: index */
:root {
  --primary: #12151C;
  --accent: #FF4D00;
  --accent-dark: #E34400;
  --bg-warm: #F7F5F2;
  --bg-dark: #0F1013;
  --bg-dark-light: #1C1E24;
  --text-main: #1A1D21;
  --text-secondary: #6B7280;
  --text-muted: #9CA3AF;
  --border: #E9E5DF;
  --border-dark: rgba(255,255,255,0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(18,20,26,0.04);
  --shadow-md: 0 8px 20px rgba(18,20,26,0.06);
  --shadow-accent: 0 4px 14px rgba(255,77,0,0.25);
  --transition: 0.25s ease-out;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --font-en: "Inter", "Helvetica", "Arial", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  background: var(--bg-warm);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
.section { padding: 90px 0; position: relative; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}
.section-label::before {
  content: "";
  width: 24px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  display: inline-block;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.section-sub {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 26px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s ease-out;
  white-space: nowrap;
  line-height: 44px;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.45);
  color: #fff;
}
.btn-outline:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--accent);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  border: 1px solid #D6D3CE;
  color: var(--text-main);
}
.btn-ghost:hover {
  background: rgba(255,77,0,0.04);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.btn-sm { height: 38px; line-height: 38px; padding: 0 20px; font-size: 14px; }
/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; width: 100%;
  z-index: 1000;
  padding: 20px 0;
  transition: background 0.3s ease-out, box-shadow 0.3s ease-out, padding 0.3s ease-out;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(247,245,242,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--border);
  padding: 12px 0;
}
.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  position: relative;
}
.brand-logo {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  white-space: nowrap;
  text-align: center;
}
.site-header:not(.scrolled) .brand-logo { color: #fff; }
.site-header.scrolled .brand-logo { color: var(--text-main); }
.brand-logo span { color: var(--accent); }
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-left { justify-content: flex-start; }
.nav-right { justify-content: flex-end; }
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 2px;
  transition: color 0.25s ease-out;
}
.site-header:not(.scrolled) .nav-link { color: rgba(255,255,255,0.8); }
.site-header:not(.scrolled) .nav-link:hover { color: #fff; }
.site-header.scrolled .nav-link { color: var(--text-secondary); }
.site-header.scrolled .nav-link:hover { color: var(--text-main); }
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.25s ease-out;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--accent); font-weight: 600; }
.site-header:not(.scrolled) .nav-link.active { color: #fff; }
.site-header:not(.scrolled) .nav-link.active::after { background: var(--accent); }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px; height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  justify-self: end;
  z-index: 1200;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease-out;
}
.site-header:not(.scrolled) .nav-toggle span { background: #fff; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: var(--bg-warm);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-16px);
  transition: all 0.35s ease-out;
  padding: 40px 24px;
}
.mobile-menu.open { opacity: 1; visibility: visible; transform: translateY(0); }
.mobile-link {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  padding: 14px 0;
  text-align: center;
  width: 100%;
  max-width: 360px;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s ease-out, border-color 0.2s ease-out;
}
.mobile-link:hover, .mobile-link.active { color: var(--accent); border-color: var(--accent); }
.mobile-menu-brand {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 24px;
}
/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.65;
  transform: scale(1.05);
  animation: heroZoom 8s ease-out forwards;
}
@keyframes heroZoom {
  from { transform: scale(1.1); }
  to { transform: scale(1); }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
    rgba(15,16,19,0.75) 0%,
    rgba(15,16,19,0.45) 50%,
    rgba(15,16,19,0.85) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 140px 24px 100px;
  animation: fadeUp 0.8s ease-out both;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,77,0,0.12);
  border: 1px solid rgba(255,77,0,0.25);
  color: #FF6D33;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: 780px;
  margin: 0 auto 20px;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
  max-width: 600px;
  margin: 0 auto 36px;
}
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  position: relative;
  z-index: 2;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.12);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  animation: fadeUp 1s ease-out 0.3s both;
}
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-en);
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  display: block;
  margin-bottom: 4px;
  letter-spacing: -0.02em;
}
.stat-num em { color: var(--accent); font-style: normal; }
.stat-label {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
/* Features */
.features {
  background: var(--bg-warm);
  padding: 100px 0;
}
.feature-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 24px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.feature-item.visible { opacity: 1; transform: translateY(0); }
.feature-item:nth-child(2) { margin-left: 60px; margin-right: -60px; }
.feature-item:nth-child(3) { margin-left: 120px; margin-right: -120px; }
.feature-num {
  font-family: var(--font-en);
  font-size: 60px;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  opacity: 0.9;
  letter-spacing: -0.03em;
}
.feature-body h3 { font-size: 20px; font-weight: 600; margin-bottom: 8px; color: var(--text-main); }
.feature-body p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; max-width: 480px; }
.feature-body a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.25s ease-out;
}
.feature-body a:hover { gap: 10px; color: var(--accent-dark); }
@media (max-width: 991.98px) {
  .feature-item:nth-child(2), .feature-item:nth-child(3) { margin-left: 0; margin-right: 0; }
}
/* Scenes */
.scenes { background: #fff; padding: 100px 0; }
.scene-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}
.scene-row:last-child { border-bottom: none; padding-bottom: 0; }
.scene-row.reverse .scene-visual { order: 2; }
.scene-row.reverse .scene-text { order: 1; }
.scene-visual {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 4/3;
  background: var(--bg-warm);
}
.scene-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease-out; }
.scene-visual:hover img { transform: scale(1.03); }
.scene-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15,16,19,0.4));
}
.scene-tag {
  position: absolute;
  left: 16px; bottom: 16px;
  z-index: 2;
  background: rgba(15,16,19,0.65);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 30px;
  border: 1px solid rgba(255,255,255,0.15);
}
.scene-text h3 { font-size: 24px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; letter-spacing: -0.01em; }
.scene-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; max-width: 460px; }
.scene-text .text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.25s ease-out;
}
.scene-text .text-link:hover { gap: 10px; color: var(--accent-dark); }
@media (max-width: 991.98px) {
  .scene-row { grid-template-columns: 1fr; gap: 32px; padding: 40px 0; }
  .scene-row.reverse .scene-visual { order: 1; }
  .scene-row.reverse .scene-text { order: 2; }
}
/* Voices */
.voices { background: var(--bg-dark); padding: 100px 0; color: #fff; }
.voices .section-title { color: #fff; }
.voices .section-sub { color: rgba(255,255,255,0.6); }
.voices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.voice-card {
  background: var(--bg-dark-light);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: 32px 28px;
  transition: all 0.3s ease-out;
}
.voice-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,77,0,0.3);
  box-shadow: 0 12px 28px rgba(0,0,0,0.25);
}
.voice-stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; margin-bottom: 16px; }
.voice-quote { font-size: 15px; line-height: 1.8; color: rgba(255,255,255,0.82); margin-bottom: 20px; }
.voice-author { display: flex; align-items: center; gap: 12px; }
.voice-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  background: rgba(255,77,0,0.15);
  color: var(--accent);
  border: 1px solid rgba(255,77,0,0.2);
}
.voice-name { font-size: 14px; font-weight: 600; color: #fff; }
.voice-role { font-size: 12px; color: rgba(255,255,255,0.45); }
@media (max-width: 767.98px) {
  .voices-grid { grid-template-columns: 1fr; }
}
/* Latest news */
.latest { background: var(--bg-warm); padding: 100px 0; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 20px; }
.news-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease-out;
  height: 100%;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,77,0,0.3);
}
.news-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-warm);
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease-out; }
.news-card:hover .news-thumb img { transform: scale(1.03); }
.news-body { display: flex; flex-direction: column; flex: 1; padding: 24px 24px 20px; }
.news-cat {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(255,77,0,0.06);
  border: 1px solid rgba(255,77,0,0.14);
  border-radius: 4px;
  padding: 2px 10px;
  margin-bottom: 12px;
  transition: all 0.2s ease-out;
}
.news-card:hover .news-cat { background: var(--accent); color: #fff; border-color: var(--accent); }
.news-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
}
.news-body .news-excerpt {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
  font-size: 12px;
  color: var(--text-muted);
}
.news-meta .read-more {
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s ease-out;
}
.news-card:hover .read-more { gap: 8px; }
.empty-state {
  text-align: center;
  padding: 60px 24px;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 15px;
  grid-column: 1 / -1;
}
@media (max-width: 991.98px) {
  .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 575.98px) {
  .news-grid { grid-template-columns: 1fr; }
}
/* FAQ */
.faq { background: #fff; padding: 100px 0; }
.faq-inner { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  background: var(--bg-warm);
  transition: border-color 0.25s ease-out, box-shadow 0.25s ease-out;
  overflow: hidden;
}
.faq-item:has(.faq-btn[aria-expanded="true"]) {
  border-color: rgba(255,77,0,0.25);
  box-shadow: 0 2px 8px rgba(18,20,26,0.04);
}
.faq-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color 0.25s ease-out;
}
.faq-btn:hover { color: var(--accent); }
.faq-icon {
  position: relative;
  width: 20px; height: 20px;
  flex-shrink: 0;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.25s ease-out;
}
.faq-icon::before { width: 14px; height: 2px; top: 9px; left: 3px; }
.faq-icon::after { width: 2px; height: 14px; top: 3px; left: 9px; }
.faq-btn[aria-expanded="true"] .faq-icon::before,
.faq-btn[aria-expanded="true"] .faq-icon::after { background: var(--accent); }
.faq-btn[aria-expanded="true"] .faq-icon::after { opacity: 0; }
.faq-body { padding: 0 24px 20px; }
.faq-body p { font-size: 15px; line-height: 1.7; color: var(--text-secondary); }
.faq-item:first-child .faq-body { display: block; }
/* CTA */
.cta-section {
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 100px 0;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(15,16,19,0.9) 0%, rgba(15,16,19,0.75) 100%);
}
.cta-inner { position: relative; z-index: 2; text-align: center; }
.cta-inner h2 { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-inner p { color: rgba(255,255,255,0.7); font-size: 16px; margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto; }
.cta-btns { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
/* Footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-brand span { color: var(--accent); }
.footer-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 300px; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  transition: color 0.2s ease-out, padding-left 0.2s ease-out;
}
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact p { font-size: 14px; color: rgba(255,255,255,0.55); margin-bottom: 8px; }
.footer-contact i { color: var(--accent); margin-right: 6px; width: 16px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 32px;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent); }
/* Sticky CTA */
.sticky-cta {
  position: fixed;
  bottom: 0; left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(15,16,19,0.92);
  backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 10px 0;
  transform: translateY(100%);
  transition: transform 0.4s ease-out;
}
.sticky-cta.show { transform: translateY(0); }
.sticky-cta .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.sticky-cta p { color: #fff; font-size: 14px; font-weight: 500; margin: 0; }
.sticky-cta .cta-btns { display: flex; gap: 10px; }
.sticky-cta .btn { height: 38px; line-height: 38px; padding: 0 18px; font-size: 13px; }
footer { padding-bottom: 0; }
body.has-sticky footer { padding-bottom: 64px; }
@media (max-width: 575.98px) {
  .sticky-cta .container { justify-content: center; }
  .sticky-cta p { display: none; }
  body.has-sticky footer { padding-bottom: 56px; }
  .sticky-cta .btn { height: 36px; line-height: 36px; font-size: 13px; padding: 0 16px; }
}
/* Animations */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
/* Responsive */
@media (max-width: 991.98px) {
  .section { padding: 60px 0; }
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: flex; }
  .header-inner { grid-template-columns: 1fr auto 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 767.98px) {
  .section-title { font-size: 24px; }
  .hero h1 { font-size: 34px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .feature-item { grid-template-columns: 64px 1fr; gap: 16px; }
  .feature-num { font-size: 44px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .scene-row { padding: 32px 0; }
}
@media (max-width: 575.98px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .hero-content { padding: 120px 20px 60px; }
  .hero-stats { margin-top: 40px; padding-top: 24px; }
  .stat-num { font-size: 28px; }
  .feature-item { margin-bottom: 8px; }
  .feature-body p { font-size: 14px; }
  .voice-card { padding: 24px 20px; }
  .cta-btns { flex-direction: column; align-items: center; }
  .cta-btns .btn { width: 100%; max-width: 280px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --bs-primary: #12151C;
            --bs-primary-dark: #0F1013;
            --bs-accent: #FF4D00;
            --bs-accent-dark: #D94100;
            --bs-bg-warm: #F7F5F2;
            --bs-bg-white: #FFFFFF;
            --bs-text-main: #1A1D21;
            --bs-text-secondary: #6B7280;
            --bs-text-muted: #9CA3AF;
            --bs-border: #E9E5DF;
            --bs-radius-btn: 4px;
            --bs-radius-card: 8px;
            --bs-radius-img: 12px;
            --bs-shadow-sm: 0 1px 2px rgba(18, 20, 26, 0.04);
            --bs-shadow-lg: 0 8px 20px rgba(18, 20, 26, 0.06);
            --bs-transition: 0.25s ease-out;
            --bs-font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --bs-font-num: Inter, "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--bs-font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--bs-text-main);
            background-color: var(--bs-bg-warm);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--bs-accent);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        section {
            position: relative;
        }

        /* 通用按钮重写 — 去除 Bootstrap 默认外观 */
        .btn {
            height: 44px;
            padding: 0 24px;
            border-radius: var(--bs-radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: all var(--bs-transition);
            border: none;
        }

        .btn-primary-custom {
            background-color: var(--bs-accent);
            color: #fff;
        }

        .btn-primary-custom:hover {
            background-color: var(--bs-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 77, 0, 0.3);
        }

        .btn-outline-custom {
            background-color: transparent;
            border: 1px solid rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        .btn-outline-custom:hover {
            background-color: rgba(255, 77, 0, 0.08);
            border-color: var(--bs-accent);
            color: #fff;
        }

        .btn-outline-dark-custom {
            background-color: transparent;
            border: 1px solid var(--bs-text-secondary);
            color: var(--bs-text-main);
        }

        .btn-outline-dark-custom:hover {
            border-color: var(--bs-accent);
            color: var(--bs-accent);
            background-color: rgba(255, 77, 0, 0.04);
            transform: translateY(-2px);
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(255, 77, 0, 0.35);
            outline-offset: 2px;
        }

        /* ========== Header / 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background-color: transparent;
            transition: background-color 0.3s ease, box-shadow 0.3s ease;
            padding: 18px 0;
        }

        .site-header.scrolled {
            background-color: rgba(247, 245, 242, 0.95);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            box-shadow: 0 1px 0 var(--bs-border);
            padding: 10px 0;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-left {
            margin-right: 48px;
        }

        .nav-right {
            margin-left: 48px;
        }

        .brand-logo {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            transition: color var(--bs-transition);
            position: relative;
            z-index: 10;
            font-family: var(--bs-font-sans);
            flex-shrink: 0;
        }

        .brand-logo span {
            color: var(--bs-accent);
            font-weight: 700;
        }

        .site-header.scrolled .brand-logo {
            color: var(--bs-text-main);
        }

        .site-header.scrolled .brand-logo span {
            color: var(--bs-accent);
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            padding: 6px 2px;
            position: relative;
            transition: color var(--bs-transition);
            border-radius: 0;
        }

        .site-header.scrolled .nav-link {
            color: var(--bs-text-main);
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background-color: var(--bs-accent);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.3s ease;
            border-radius: 1px;
        }

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

        .nav-link:hover,
        .nav-link.active {
            color: var(--bs-accent);
        }

        .site-header.scrolled .nav-link:hover,
        .site-header.scrolled .nav-link.active {
            color: var(--bs-accent);
        }

        /* 汉堡菜单按钮 */
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1100;
            cursor: pointer;
            padding: 0;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: #fff;
            margin: 5px auto;
            transition: all 0.35s ease;
            border-radius: 2px;
        }

        .site-header.scrolled .nav-toggle span {
            background-color: var(--bs-text-main);
        }

        /* ========== Page Hero（分类页窄条） ========== */
        .page-hero {
            padding: 200px 0 80px;
            background: linear-gradient(rgba(18, 20, 26, 0.82), rgba(18, 20, 26, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            text-align: center;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(255, 77, 0, 0.15);
            border: 1px solid rgba(255, 77, 0, 0.35);
            color: #FF9A66;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        .page-hero h1 {
            font-family: var(--bs-font-sans);
            font-size: clamp(34px, 5vw, 50px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 18px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }

        .page-hero h1 .accent-text {
            color: var(--bs-accent);
        }

        .page-hero .hero-lead {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .page-hero .hero-meta {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .page-hero .hero-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.02em;
        }

        /* ========== 通用板块样式 ========== */
        .section-block {
            padding: 96px 0;
            border-bottom: 1px solid var(--bs-border);
        }

        .section-block:last-of-type {
            border-bottom: none;
        }

        .section-block.bg-light-warm {
            background-color: var(--bs-bg-warm);
        }

        .section-block.bg-white {
            background-color: var(--bs-bg-white);
        }

        .section-block.bg-dark {
            background-color: var(--bs-primary);
            color: #fff;
            border-bottom: none;
        }

        .sec-eyebrow {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--bs-accent);
            margin-bottom: 10px;
            display: inline-block;
        }

        .sec-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--bs-text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .sec-subtitle {
            font-size: 16px;
            color: var(--bs-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .section-block.bg-dark .sec-title {
            color: #fff;
        }

        .section-block.bg-dark .sec-subtitle {
            color: rgba(255, 255, 255, 0.75);
        }

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

        /* ========== 内容区排版 ========== */
        .content-brief {
            font-size: 16px;
            line-height: 1.8;
            color: var(--bs-text-main);
            margin-bottom: 24px;
        }

        .content-brief p {
            margin-bottom: 16px;
        }

        .content-brief strong {
            color: var(--bs-text-main);
            font-weight: 600;
        }

        .content-feature-list {
            list-style: none;
            padding: 0;
            margin: 24px 0;
        }

        .content-feature-list li {
            padding-left: 28px;
            position: relative;
            margin-bottom: 12px;
            line-height: 1.7;
            color: var(--bs-text-secondary);
        }

        .content-feature-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--bs-accent);
            font-weight: 700;
            font-size: 15px;
        }

        /* ========== 数据统计条 ========== */
        .stat-strip {
            background-color: var(--bs-primary-dark);
            padding: 32px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .stat-strip .stat-item {
            text-align: center;
            padding: 12px 0;
        }

        .stat-number {
            font-family: var(--bs-font-num);
            font-size: 36px;
            font-weight: 700;
            color: var(--bs-accent);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 0.06em;
            margin-top: 6px;
            text-transform: uppercase;
        }

        /* ========== 特色卡片（用于替代服务卡） ========== */
        .feature-item {
            display: flex;
            gap: 32px;
            padding: 32px 0;
            border-bottom: 1px solid var(--bs-border);
            transition: all var(--bs-transition);
        }

        .feature-item:last-of-type {
            border-bottom: none;
        }

        .feature-number {
            font-family: var(--bs-font-num);
            font-size: 48px;
            font-weight: 800;
            color: var(--bs-accent);
            line-height: 1;
            flex-shrink: 0;
            letter-spacing: -0.03em;
        }

        .feature-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--bs-text-main);
        }

        .feature-content p {
            color: var(--bs-text-secondary);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 720px;
        }

        /* ========== 场景展示（左右交替） ========== */
        .scene-item {
            display: flex;
            align-items: center;
            gap: 56px;
            margin-bottom: 56px;
        }

        .scene-item:last-child {
            margin-bottom: 0;
        }

        .scene-image {
            flex: 0 0 46%;
            border-radius: var(--bs-radius-img);
            overflow: hidden;
            box-shadow: var(--bs-shadow-lg);
            position: relative;
            aspect-ratio: 4/3;
        }

        .scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .scene-item:hover .scene-image img {
            transform: scale(1.03);
        }

        .scene-content {
            flex: 1;
        }

        .scene-content h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--bs-text-main);
        }

        .scene-content p {
            color: var(--bs-text-secondary);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .scene-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--bs-accent);
            font-weight: 500;
            font-size: 14px;
        }

        .scene-link:hover {
            color: var(--bs-accent-dark);
        }

        .scene-link i {
            transition: transform var(--bs-transition);
        }

        .scene-link:hover i {
            transform: translateX(4px);
        }

        /* ========== 引用 / 社会认同 ========== */
        .testimonial-card {
            padding: 28px;
            background-color: #fff;
            border: 1px solid var(--bs-border);
            border-radius: var(--bs-radius-card);
            box-shadow: var(--bs-shadow-sm);
            transition: all var(--bs-transition);
            height: 100%;
        }

        .testimonial-card:hover {
            box-shadow: var(--bs-shadow-lg);
            border-color: rgba(255, 77, 0, 0.3);
            transform: translateY(-2px);
        }

        .testimonial-stars {
            color: var(--bs-accent);
            font-size: 14px;
            margin-bottom: 14px;
            letter-spacing: 2px;
        }

        .testimonial-text {
            font-size: 15px;
            color: var(--bs-text-main);
            line-height: 1.75;
            margin-bottom: 20px;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--bs-primary);
            color: var(--bs-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }

        .author-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--bs-text-main);
            line-height: 1.3;
        }

        .author-role {
            font-size: 12px;
            color: var(--bs-text-muted);
            line-height: 1.4;
        }

        /* ========== 数据/流程区块 ========== */
        .process-step {
            text-align: left;
            padding: 24px;
            border-left: 3px solid var(--bs-border);
            transition: all var(--bs-transition);
        }

        .process-step:hover {
            border-left-color: var(--bs-accent);
            background-color: rgba(255, 77, 0, 0.02);
        }

        .process-step .step-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--bs-accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            display: block;
            margin-bottom: 8px;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--bs-text-main);
        }

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

        /* ========== FAQ 手风琴样式 ========== */
        .faq-wrap {
            padding: 24px;
            background-color: #fff;
            border: 1px solid var(--bs-border);
            border-radius: var(--bs-radius-card);
            margin-bottom: 12px;
            transition: box-shadow var(--bs-transition);
        }

        .faq-wrap:hover {
            box-shadow: var(--bs-shadow-sm);
        }

        .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--bs-text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0;
            transition: color var(--bs-transition);
        }

        .faq-question:hover {
            color: var(--bs-accent);
        }

        .faq-question .faq-icon {
            color: var(--bs-accent);
            font-size: 22px;
            transition: transform 0.3s ease;
            line-height: 1;
            font-weight: 300;
            flex-shrink: 0;
        }

        .faq-wrap.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            display: none;
            padding-top: 12px;
            color: var(--bs-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-wrap.active .faq-answer {
            display: block;
        }

        /* ========== CTA 区块 ========== */
        .cta-section {
            background: linear-gradient(rgba(18, 20, 26, 0.75), rgba(18, 20, 26, 0.75)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            padding: 88px 0;
            text-align: center;
            position: relative;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto 30px;
        }

        .cta-section .btn-group-custom {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-footer {
            background-color: var(--bs-primary-dark);
            padding: 72px 0;
            text-align: center;
            border-top: 1px solid rgba(255, 77, 0, 0.2);
        }

        .cta-footer h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-footer p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 15px;
        }

        /* ========== 分隔线 ========== */
        .divider-line {
            border: 0;
            border-top: 1px solid var(--bs-border);
            margin: 0;
        }

        .divider-line-light {
            border-color: rgba(255, 255, 255, 0.1);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background-color: var(--bs-primary-dark);
            color: #c9ccd4;
            padding-top: 72px;
            padding-bottom: 28px;
            font-size: 14px;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .footer-brand span {
            color: var(--bs-accent);
        }

        .footer-desc {
            color: #9CA3AF;
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            color: #9CA3AF;
            font-size: 14px;
            transition: color var(--bs-transition);
        }

        .footer-col ul a:hover {
            color: var(--bs-accent);
        }

        .footer-contact p {
            color: #9CA3AF;
            font-size: 14px;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--bs-accent);
            font-size: 15px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            color: #6B7280;
            font-size: 13px;
        }

        /* ========== 响应式断点 ========== */
        @media (max-width: 992px) {
            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .header-inner {
                justify-content: center;
                height: 56px;
            }

            .brand-logo {
                font-size: 21px;
            }

            /* 全屏遮罩菜单 */
            .site-header.mobile-nav-open .nav-left,
            .site-header.mobile-nav-open .nav-right {
                display: flex;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                bottom: 0;
                background: rgba(18, 20, 26, 0.98);
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 16px;
                z-index: 1050;
            }

            .site-header.mobile-nav-open .nav-right {
                top: 60%;
            }

            .site-header.mobile-nav-open .nav-left {
                top: 40%;
            }

            .site-header.mobile-nav-open .nav-link {
                color: #fff;
                font-size: 18px;
            }

            .site-header.mobile-nav-open .nav-link::after {
                background-color: var(--bs-accent);
            }

            .site-header.mobile-nav-open {
                background-color: transparent;
            }

            .site-header.mobile-nav-open .brand-logo {
                color: #fff;
                z-index: 1100;
            }

            .site-header.mobile-nav-open .nav-toggle span {
                background-color: #fff;
                z-index: 1100;
            }

            .site-header.mobile-nav-open .nav-toggle span:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }

            .site-header.mobile-nav-open .nav-toggle span:nth-child(2) {
                opacity: 0;
            }

            .site-header.mobile-nav-open .nav-toggle span:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }

            .page-hero {
                min-height: 380px;
                padding: 160px 0 60px;
            }

            .section-block {
                padding: 72px 0;
            }

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

            .feature-item {
                gap: 24px;
            }

            .scene-item {
                flex-direction: column;
                gap: 28px;
                margin-bottom: 48px;
            }

            .scene-image {
                flex: 0 0 auto;
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .page-hero h1 {
                font-size: 34px;
            }

            .page-hero .hero-lead {
                font-size: 16px;
            }

            .feature-item {
                flex-direction: row;
                align-items: flex-start;
            }

            .feature-number {
                font-size: 36px;
            }

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

            .sec-title {
                font-size: 26px;
            }

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

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }

            .cta-section,
            .cta-footer {
                padding: 64px 0;
            }

            .cta-section h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 576px) {
            .btn {
                height: 40px;
                padding: 0 18px;
                font-size: 14px;
                width: 100%;
                max-width: 280px;
                margin: 0 auto;
            }

            .btn-group-custom {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .page-hero {
                min-height: 340px;
                padding: 140px 0 48px;
            }

            .hero-meta {
                flex-direction: column;
                align-items: center;
                gap: 8px;
            }

            .page-hero .hero-meta .meta-item {
                font-size: 12px;
            }

            .stat-number {
                font-size: 28px;
            }

            .stat-label {
                font-size: 11px;
            }

            .feature-item {
                flex-direction: column;
                gap: 12px;
                padding: 24px 0;
            }

            .feature-number {
                font-size: 32px;
            }

            .scene-content h3 {
                font-size: 19px;
            }

            .sec-title {
                font-size: 22px;
            }

            .faq-question {
                font-size: 14px;
                gap: 12px;
            }

            .site-footer {
                padding-top: 48px;
            }
        }

        /* 滚动显现动画 */
        .reveal {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.65s ease-out, transform 0.65s ease-out;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category2 */
:root {
            --primary: #12151C;
            --accent: #FF4D00;
            --bg-warm: #F7F5F2;
            --white: #FFFFFF;
            --dark: #0F1013;
            --text-main: #1A1D21;
            --text-sub: #6B7280;
            --text-weak: #9CA3AF;
            --border: #E9E5DF;
            --radius-btn: 4px;
            --radius-card: 8px;
            --radius-img: 12px;
            --shadow-card: 0 1px 2px rgba(18, 20, 26, 0.04);
            --shadow-hover: 0 8px 20px rgba(18, 20, 26, 0.06);
            --transition: 0.25s ease-out;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* ---------- Header / Nav ---------- */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(247, 245, 242, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid transparent;
            transition: background 0.25s ease, box-shadow 0.25s ease;
            height: 72px;
        }
        .site-header.scrolled {
            border-bottom-color: var(--border);
            box-shadow: 0 2px 12px rgba(18, 20, 26, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            height: 72px;
            max-width: 1320px;
        }
        .brand-logo {
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--primary);
            display: inline-flex;
            align-items: baseline;
            z-index: 10;
            transition: color 0.25s;
            white-space: nowrap;
        }
        .brand-logo span {
            color: var(--accent);
            margin-left: 2px;
        }
        .brand-logo:hover {
            color: var(--accent);
        }
        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 40px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-left {
            position: absolute;
            left: 24px;
            top: 0;
            bottom: 0;
        }
        .nav-right {
            position: absolute;
            right: 24px;
            top: 0;
            bottom: 0;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 8px 2px;
            letter-spacing: 0.02em;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.25s ease;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            position: absolute;
            right: 16px;
            top: 16px;
            z-index: 20;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: transparent;
            border-radius: 4px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.25s, opacity 0.25s;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* ---------- Hero ---------- */
        .category-hero {
            position: relative;
            height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            margin-top: 72px;
            color: var(--white);
            overflow: hidden;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(18, 21, 28, 0.72), rgba(15, 16, 19, 0.45));
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            font-size: clamp(34px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin: 0 0 12px;
            color: var(--white);
        }
        .category-hero p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.86);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .hero-dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            margin: 0 10px 3px;
        }
        /* ---------- Main Sections ---------- */
        .section-block {
            padding: 88px 0;
            border-bottom: 1px solid var(--border);
        }
        .section-block.alt-bg {
            background: var(--white);
        }
        .section-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.01em;
            color: var(--text-main);
            margin: 0 0 16px;
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 40px;
        }
        .section-title.center,
        .section-label.center,
        .section-sub.center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        /* ---------- Buttons ---------- */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: var(--white);
            font-size: 15px;
            font-weight: 600;
            padding: 0 28px;
            height: 44px;
            border-radius: var(--radius-btn);
            transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s;
            border: none;
        }
        .btn-primary-custom:hover {
            background: #e64500;
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(255, 77, 0, 0.22);
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--white);
            font-size: 15px;
            font-weight: 600;
            padding: 0 28px;
            height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.65);
            transition: background 0.25s ease, transform 0.25s, border-color 0.25s;
        }
        .btn-outline-custom:hover {
            background: rgba(255, 77, 0, 0.08);
            border-color: var(--accent);
            color: var(--white);
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-main);
            font-size: 15px;
            font-weight: 600;
            padding: 0 28px;
            height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--border);
            transition: background 0.25s ease, border-color 0.25s, transform 0.25s;
        }
        .btn-outline-dark:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 77, 0, 0.04);
            transform: translateY(-2px);
        }
        .btn-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
        .btn-row.center {
            justify-content: center;
        }
        /* ---------- Split Image / Text ---------- */
        .split-wrap {
            display: flex;
            align-items: center;
            gap: 56px;
        }
        .split-media {
            flex: 0 0 48%;
            border-radius: var(--radius-img);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .split-media img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .split-media:hover img {
            transform: scale(1.03);
        }
        .split-content {
            flex: 1;
        }
        .split-content h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin: 0 0 12px;
        }
        .split-content p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .split-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            margin-top: 12px;
            transition: gap 0.25s;
        }
        .split-link:hover {
            gap: 10px;
            color: #e64500;
        }
        /* ---------- Service Items (numbered) ---------- */
        .service-items {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .service-item {
            display: flex;
            align-items: flex-start;
            gap: 32px;
            padding: 36px 0;
            border-bottom: 1px solid var(--border);
            transition: background 0.25s;
        }
        .service-item:last-child {
            border-bottom: none;
        }
        .service-item:hover {
            background: rgba(255, 77, 0, 0.02);
        }
        .service-num {
            font-size: 42px;
            font-weight: 800;
            line-height: 1;
            color: var(--accent);
            letter-spacing: -0.04em;
            min-width: 80px;
            font-family: Inter, Helvetica, Arial, sans-serif;
        }
        .service-body h3 {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin: 0 0 8px;
            color: var(--text-main);
        }
        .service-body p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
            margin: 0;
            max-width: 640px;
        }
        /* ---------- Process ---------- */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 20px;
        }
        .process-step {
            position: relative;
            padding: 28px 20px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s, border-color 0.25s;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 77, 0, 0.35);
        }
        .process-step .step-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--accent);
            font-family: Inter, Helvetica, Arial, sans-serif;
            display: block;
            margin-bottom: 10px;
        }
        .process-step h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }
        /* ---------- Promise Cards ---------- */
        .promise-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 12px;
        }
        .promise-card {
            padding: 28px 24px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
        }
        .promise-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(255, 77, 0, 0.3);
        }
        .promise-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(255, 77, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .promise-icon i {
            font-size: 22px;
            color: var(--accent);
        }
        .promise-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 8px;
        }
        .promise-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin: 0;
        }
        /* ---------- FAQ ---------- */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .accordion-item {
            background: var(--white);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius-card) !important;
            margin-bottom: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.25s, border-color 0.25s;
        }
        .accordion-item:hover {
            border-color: rgba(255, 77, 0, 0.3) !important;
            box-shadow: var(--shadow-hover);
        }
        .accordion-button {
            background: var(--white) !important;
            color: var(--text-main) !important;
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            position: relative;
            box-shadow: none !important;
            border-radius: var(--radius-card) !important;
            font-family: var(--font-family);
        }
        .accordion-button:not(.collapsed) {
            color: var(--accent) !important;
        }
        .accordion-button::after {
            content: "+";
            background: none !important;
            font-size: 22px;
            font-weight: 400;
            color: var(--text-sub);
            width: auto;
            height: auto;
            transform: none;
            transition: transform 0.25s;
            line-height: 1;
        }
        .accordion-button:not(.collapsed)::after {
            content: "×";
            transform: rotate(90deg);
            color: var(--accent);
        }
        .accordion-body {
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
            border-top: none;
        }
        /* ---------- Inpage CTA ---------- */
        .cta-banner {
            background: var(--dark);
            border-radius: 16px;
            padding: 48px 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 77, 0, 0.12);
            pointer-events: none;
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 140px;
            height: 140px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-banner h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--white);
            margin: 0 0 12px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 480px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-primary-custom {
            position: relative;
            z-index: 1;
        }
        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 24px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .footer-brand span {
            color: var(--accent);
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            margin: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--white);
            margin: 0 0 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.25s;
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-contact p {
            margin-bottom: 10px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact i {
            color: var(--accent);
            font-size: 15px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        /* ---------- Animations ---------- */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* ---------- Hero fade-in sequence ---------- */
        .category-hero h1,
        .category-hero p {
            opacity: 0;
            transform: translateY(16px);
            animation: heroUp 0.6s ease-out forwards;
        }
        .category-hero h1 {
            animation-delay: 0.1s;
        }
        .category-hero p {
            animation-delay: 0.25s;
        }
        @keyframes heroUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        /* ---------- Responsive ---------- */
        @media (max-width: 991.98px) {
            .nav-left,
            .nav-right {
                position: fixed;
                top: 72px;
                bottom: 0;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                gap: 24px;
                background: rgba(247, 245, 242, 0.98);
                padding: 48px 24px;
                transform: translateY(-100%);
                transition: transform 0.3s ease;
                z-index: 999;
            }
            .site-header.nav-open .nav-left,
            .site-header.nav-open .nav-right {
                transform: translateY(0);
            }
            .nav-left {
                padding-top: 96px;
            }
            .nav-link {
                font-size: 20px;
                font-weight: 600;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                height: 240px;
                margin-top: 72px;
            }
            .section-block {
                padding: 64px 0;
            }
            .split-wrap {
                flex-direction: column;
                gap: 32px;
            }
            .split-media {
                flex: 0 0 100%;
                width: 100%;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .promise-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 575.98px) {
            .header-inner {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-logo {
                font-size: 20px;
            }
            .category-hero {
                height: 220px;
                margin-top: 72px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 15px;
                padding: 0 16px;
            }
            .section-block {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .service-item {
                flex-direction: column;
                gap: 14px;
                padding: 28px 0;
            }
            .service-num {
                font-size: 34px;
                min-width: 0;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .promise-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .btn-row {
                flex-direction: column;
                width: 100%;
            }
            .btn-primary-custom,
            .btn-outline-custom,
            .btn-outline-dark {
                width: 100%;
            }
            .cta-banner {
                padding: 36px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }
        @media (max-width: 767.98px) and (min-width: 576px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .promise-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .section-block {
                padding: 56px 0;
            }
        }

/* roulang page: article */
:root {
      --color-primary: #12151C;
      --color-accent: #FF4D00;
      --color-accent-hover: #E64600;
      --color-bg: #F7F5F2;
      --color-white: #FFFFFF;
      --color-dark: #0F1013;
      --text-main: #1A1D21;
      --text-secondary: #6B7280;
      --text-weak: #9CA3AF;
      --color-border: #E9E5DF;
      --color-input-border: #D6D3CE;
      --radius-btn: 4px;
      --radius-card: 8px;
      --radius-image: 12px;
      --shadow-card: 0 1px 2px rgba(18,20,26,0.04);
      --shadow-card-hover: 0 8px 20px rgba(18,20,26,0.06);
      --transition: 0.25s ease-out;
      --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
      --font-family-num: "Inter", "Helvetica Neue", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-main);
      background: var(--color-bg);
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

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

    a:focus-visible,
    button:focus-visible,
    .btn:focus-visible {
      outline: 3px solid rgba(255,77,0,0.25);
      outline-offset: 2px;
    }

    .container {
      max-width: 1200px;
      padding-left: 20px;
      padding-right: 20px;
    }

    @media (min-width: 1400px) {
      .container {
        max-width: 1280px;
      }
    }

    /* ========== Header / Nav ========== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1040;
      background: transparent;
      padding: 20px 0;
      transition: background var(--transition), padding var(--transition), box-shadow var(--transition), border-color var(--transition);
      border-bottom: 1px solid transparent;
    }

    .site-header.scrolled {
      background: rgba(247,245,242,0.95);
      border-bottom: 1px solid var(--color-border);
      padding: 12px 0;
      box-shadow: 0 4px 24px rgba(18,20,26,0.04);
    }

    .site-header.nav-open {
      background: var(--color-bg);
      border-bottom: 1px solid var(--color-border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: relative;
      min-height: 48px;
    }

    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 32px;
      margin: 0;
      padding: 0;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: rgba(255,255,255,0.85);
      letter-spacing: 0.01em;
      padding: 8px 0;
      position: relative;
      text-decoration: none;
      transition: color var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover {
      color: var(--color-accent);
    }

    .nav-link.active {
      color: var(--color-accent);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 2px;
      background: var(--color-accent);
      border-radius: 2px;
    }

    .site-header.scrolled .nav-link {
      color: var(--text-main);
    }

    .site-header.scrolled .nav-link:hover,
    .site-header.scrolled .nav-link.active {
      color: var(--color-accent);
    }

    .site-header.nav-open .nav-link {
      color: var(--text-main);
    }

    .brand-logo {
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.2;
      color: #FFF;
      text-decoration: none;
      white-space: nowrap;
      transition: color var(--transition);
      z-index: 5;
    }

    .brand-logo span {
      color: var(--color-accent);
    }

    .site-header.scrolled .brand-logo,
    .site-header.nav-open .brand-logo {
      color: var(--text-main);
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: none;
      background: transparent;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      padding: 0;
      cursor: pointer;
      color: #FFF;
      transition: color var(--transition);
      z-index: 6;
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform var(--transition), opacity var(--transition);
    }

    .nav-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .site-header.scrolled .nav-toggle,
    .site-header.nav-open .nav-toggle {
      color: var(--text-main);
    }

    /* ========== Banner / Breadcrumb ========== */
    .page-banner {
      position: relative;
      min-height: 340px;
      display: flex;
      align-items: flex-end;
      padding: 150px 0 72px;
      background-color: var(--color-primary);
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
    }

    .banner-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(18,20,26,0.30) 0%, rgba(18,20,26,0.72) 100%);
      z-index: 1;
    }

    .banner-content {
      position: relative;
      z-index: 2;
    }

    .breadcrumb-nav {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 13px;
      color: rgba(255,255,255,0.65);
      letter-spacing: 0.02em;
    }

    .breadcrumb-nav a {
      color: rgba(255,255,255,0.75);
      text-decoration: none;
      transition: color var(--transition);
    }

    .breadcrumb-nav a:hover {
      color: var(--color-accent);
    }

    .breadcrumb-nav .sep {
      color: rgba(255,255,255,0.35);
    }

    .breadcrumb-nav .current {
      color: rgba(255,255,255,0.85);
      max-width: 420px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .banner-text {
      margin-top: 24px;
    }

    .page-title {
      color: #FFF;
      font-size: clamp(28px, 4vw, 42px);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin: 0 0 18px;
      max-width: 860px;
    }

    /* ========== Article Meta ========== */
    .article-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: rgba(255,255,255,0.8);
      letter-spacing: 0.02em;
    }

    .article-meta .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-family: var(--font-family-num);
      font-size: 13px;
    }

    .article-meta .meta-item i {
      font-size: 14px;
      color: var(--color-accent);
    }

    .badge-cat {
      display: inline-block;
      padding: 3px 12px;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.04em;
      border-radius: var(--radius-btn);
      background: rgba(255,255,255,0.14);
      color: #FFF;
      border: 1px solid rgba(255,255,255,0.24);
      transition: all var(--transition);
    }

    .badge-cat:hover {
      background: var(--color-accent);
      border-color: var(--color-accent);
    }

    /* ========== Article Card ========== */
    .article-section {
      padding: 0 0 80px;
      margin-top: -52px;
      position: relative;
      z-index: 3;
    }

    .article-card {
      background: var(--color-white);
      border-radius: var(--radius-image);
      padding: 56px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-card);
      transition: box-shadow var(--transition), border-color var(--transition);
    }

    .article-card:hover {
      box-shadow: var(--shadow-card-hover);
    }

    .article-body {
      font-size: 16.5px;
      line-height: 1.8;
      color: var(--text-main);
      word-break: break-word;
    }

    .article-body p {
      margin-bottom: 1.6em;
    }

    .article-body h2 {
      font-size: 24px;
      font-weight: 700;
      line-height: 1.3;
      margin: 1.6em 0 0.8em;
      color: var(--text-main);
      letter-spacing: -0.01em;
    }

    .article-body h3 {
      font-size: 20px;
      font-weight: 600;
      line-height: 1.4;
      margin: 1.4em 0 0.7em;
      color: var(--text-main);
    }

    .article-body h4 {
      font-size: 17px;
      font-weight: 600;
      line-height: 1.4;
      margin: 1.2em 0 0.6em;
      color: var(--text-main);
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 1.6em;
      padding-left: 1.6em;
    }

    .article-body li {
      margin-bottom: 0.5em;
    }

    .article-body a {
      color: var(--color-accent);
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-body a:hover {
      color: var(--color-accent-hover);
    }

    .article-body blockquote {
      border-left: 4px solid var(--color-accent);
      background: var(--color-bg);
      padding: 18px 24px;
      margin: 28px 0;
      border-radius: 0 var(--radius-card) var(--radius-card) 0;
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.7;
    }

    .article-body blockquote p {
      margin-bottom: 0;
    }

    .article-body code {
      background: #F3F4F6;
      padding: 2px 8px;
      border-radius: 4px;
      font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
      font-size: 0.9em;
      color: #C0392B;
    }

    .article-body pre {
      background: var(--color-dark);
      color: #FFF;
      padding: 22px 26px;
      border-radius: var(--radius-card);
      overflow: auto;
      margin: 28px 0;
      line-height: 1.6;
    }

    .article-body pre code {
      background: transparent;
      color: inherit;
      padding: 0;
      font-size: 14px;
    }

    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 28px 0;
    }

    .article-body th,
    .article-body td {
      border: 1px solid var(--color-border);
      padding: 12px 16px;
      text-align: left;
      font-size: 15px;
    }

    .article-body th {
      background: var(--color-bg);
      font-weight: 600;
    }

    .article-body img {
      max-width: 100%;
      height: auto;
      border-radius: var(--radius-image);
      margin: 28px 0;
    }

    /* ========== Article Empty ========== */
    .article-empty {
      background: var(--color-white);
      border-radius: var(--radius-image);
      padding: 80px 32px;
      border: 1px solid var(--color-border);
      text-align: center;
      box-shadow: var(--shadow-card);
    }

    .empty-icon {
      font-size: 48px;
      color: var(--color-accent);
      margin-bottom: 16px;
    }

    .article-empty h2 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .article-empty p {
      color: var(--text-secondary);
      margin-bottom: 28px;
      max-width: 420px;
      margin-left: auto;
      margin-right: auto;
    }

    /* ========== Button ========== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 26px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      letter-spacing: 0.01em;
      text-decoration: none;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--color-accent);
      color: #FFF;
      border-color: var(--color-accent);
    }

    .btn-primary:hover {
      background: var(--color-accent-hover);
      border-color: var(--color-accent-hover);
      color: #FFF;
      transform: translateY(-2px);
      box-shadow: 0 8px 16px rgba(255,77,0,0.20);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 4px 8px rgba(255,77,0,0.16);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-main);
      border-color: var(--color-input-border);
    }

    .btn-outline:hover {
      background: rgba(255,77,0,0.05);
      border-color: var(--color-accent);
      color: var(--color-accent);
      transform: translateY(-2px);
    }

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

    /* ========== Related ========== */
    .related-section {
      padding: 16px 0 96px;
      background: transparent;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 20px;
      margin-bottom: 40px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin: 0;
      position: relative;
    }

    .section-title::before {
      content: "";
      display: inline-block;
      width: 6px;
      height: 24px;
      background: var(--color-accent);
      border-radius: 3px;
      margin-right: 12px;
      vertical-align: -3px;
    }

    .related-card {
      display: flex;
      width: 100%;
      height: 100%;
      background: var(--color-white);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-card);
      overflow: hidden;
      text-decoration: none;
      transition: all var(--transition);
      box-shadow: var(--shadow-card);
    }

    .related-card:hover {
      border-color: var(--color-accent);
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }

    .related-thumb {
      width: 108px;
      flex-shrink: 0;
      overflow: hidden;
      background: var(--color-bg);
    }

    .related-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease-out;
    }

    .related-card:hover .related-thumb img {
      transform: scale(1.03);
    }

    .related-info {
      padding: 18px 20px;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
    }

    .related-cat {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: var(--color-accent);
      background: rgba(255,77,0,0.08);
      border-radius: 4px;
      padding: 2px 10px;
      margin-bottom: 8px;
      letter-spacing: 0.02em;
    }

    .related-info h3 {
      font-size: 16px;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text-main);
      margin: 0 0 6px;
      transition: color var(--transition);
    }

    .related-card:hover .related-info h3 {
      color: var(--color-accent);
    }

    .related-info p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin: 0;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: var(--color-dark);
      color: rgba(255,255,255,0.7);
      padding: 64px 0 0;
      margin-top: 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .footer-brand {
      font-size: 22px;
      font-weight: 800;
      color: #FFF;
      letter-spacing: -0.02em;
      line-height: 1.2;
    }

    .footer-brand span {
      color: var(--color-accent);
    }

    .footer-desc {
      margin-top: 14px;
      font-size: 14px;
      color: rgba(255,255,255,0.55);
      line-height: 1.7;
      max-width: 340px;
    }

    .footer-col h4 {
      font-size: 14px;
      font-weight: 600;
      color: #FFF;
      margin: 0 0 16px;
      letter-spacing: 0.04em;
    }

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

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul a {
      color: rgba(255,255,255,0.55);
      text-decoration: none;
      font-size: 14px;
      transition: color var(--transition);
    }

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

    .footer-contact p {
      font-size: 14px;
      color: rgba(255,255,255,0.55);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-contact p i {
      color: var(--color-accent);
      font-size: 14px;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      padding: 20px 0;
      font-size: 13px;
      color: rgba(255,255,255,0.35);
      font-family: var(--font-family-num);
    }

    /* ========== Responsive ========== */
    @media (max-width: 991.98px) {
      .nav-toggle {
        display: flex;
      }

      .nav-left,
      .nav-right {
        display: none;
        position: fixed;
        left: 0;
        width: 100%;
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        gap: 20px;
        z-index: 1035;
        margin: 0;
      }

      .nav-left {
        top: 64px;
        padding: 36px 24px 12px;
        box-shadow: 0 1px 0 var(--color-border);
      }

      .nav-right {
        top: 210px;
        padding: 16px 24px 40px;
        min-height: 40vh;
      }

      .site-header.nav-open .nav-left,
      .site-header.nav-open .nav-right {
        display: flex;
      }

      .nav-link {
        font-size: 18px;
        color: var(--text-main);
      }

      .nav-link.active {
        color: var(--color-accent);
      }

      .header-inner {
        min-height: 44px;
      }

      .page-banner {
        min-height: 300px;
        padding: 130px 0 56px;
      }

      .breadcrumb-nav .current {
        max-width: 260px;
      }

      .article-section {
        margin-top: -40px;
      }

      .article-card {
        padding: 40px 32px;
      }

      .related-section {
        padding: 8px 0 72px;
      }

      .section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        margin-bottom: 28px;
      }

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

    @media (max-width: 767.98px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .site-header {
        padding: 10px 0;
      }

      .brand-logo {
        font-size: 20px;
      }

      .page-banner {
        min-height: 280px;
        padding: 120px 0 48px;
      }

      .page-title {
        font-size: 26px;
        line-height: 1.25;
        margin-bottom: 14px;
      }

      .article-meta {
        gap: 12px;
        font-size: 12px;
      }

      .article-card {
        padding: 28px 20px;
        border-radius: var(--radius-card);
      }

      .article-body {
        font-size: 15.5px;
        line-height: 1.75;
      }

      .article-empty {
        padding: 56px 20px;
      }

      .related-thumb {
        width: 90px;
      }

      .related-info {
        padding: 14px 16px;
      }

      .related-info h3 {
        font-size: 15px;
      }

      .related-info p {
        font-size: 13px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 36px;
      }

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

    @media (max-width: 520px) {
      .btn {
        height: 42px;
        padding: 0 20px;
        font-size: 14px;
      }

      .breadcrumb-nav {
        font-size: 12px;
      }

      .breadcrumb-nav .current {
        max-width: 180px;
      }

      .related-thumb {
        width: 80px;
      }

      .related-info h3 {
        font-size: 14px;
      }

      .related-info p {
        -webkit-line-clamp: 2;
      }
    }

/* roulang page: category3 */
/* ========== 设计变量 ========== */
:root {
  --c-primary: #12151C;
  --c-accent: #FF4D00;
  --c-bg: #F7F5F2;
  --c-white: #FFFFFF;
  --c-dark: #0F1013;
  --c-text: #1A1D21;
  --c-text-secondary: #6B7280;
  --c-text-muted: #9CA3AF;
  --c-border: #E9E5DF;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(18,20,26,0.04);
  --shadow-md: 0 8px 20px rgba(18,20,26,0.06);
  --shadow-lg: 0 12px 32px rgba(18,20,26,0.10);
  --transition: 0.25s ease-out;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  --font-num: "Inter", "Helvetica", "Arial", sans-serif;
}

/* ========== Reset / Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.8;
  font-size: 16px;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button { font-family: var(--font-sans); }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
::selection { background: rgba(255,77,0,0.15); }

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
  padding: 18px 0;
}
.site-header.scrolled {
  background: rgba(247,245,242,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 1px 8px rgba(0,0,0,0.03);
  padding: 12px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.brand-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--c-primary);
  white-space: nowrap;
  z-index: 2;
}
.brand-logo span {
  color: var(--c-accent);
  font-weight: 800;
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
}
.nav-left { justify-content: flex-start; }
.nav-right { justify-content: flex-end; }
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-secondary);
  padding: 6px 0;
  position: relative;
  white-space: nowrap;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition);
}
.nav-link:hover { color: var(--c-primary); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active {
  color: var(--c-primary);
  font-weight: 600;
}
.nav-link.active::after { transform: scaleX(1); }

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  width: 40px; height: 40px;
  cursor: pointer;
  z-index: 3;
  padding: 0;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-primary);
  margin: 5px auto;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端全屏菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--c-bg);
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a {
  font-size: 24px;
  font-weight: 600;
  padding: 16px 24px;
  color: var(--c-text);
  border-radius: var(--radius-md);
  transition: background 0.2s, color 0.2s;
}
.mobile-menu a:hover,
.mobile-menu a.active { background: rgba(255,77,0,0.08); color: var(--c-accent); }

/* ========== 按钮 ========== */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--c-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  height: 44px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-brand:hover {
  background: #E04400;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255,77,0,0.25);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  height: 44px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.btn-outline:hover {
  border-color: var(--c-accent);
  background: rgba(255,77,0,0.05);
  color: var(--c-accent);
  transform: translateY(-2px);
}

/* ========== Hero ========== */
.page-hero {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-size: cover;
  background-position: center;
  background-color: var(--c-primary);
  margin-top: 0;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(18,20,26,0.82) 0%, rgba(15,16,19,0.65) 100%);
  z-index: 1;
}
.page-hero .container { position: relative; z-index: 2; padding-top: 60px; padding-bottom: 40px; }
.page-hero h1 {
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.page-hero p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ========== Section 通用 ========== */
.section { padding: 88px 0; }
.section-alt { background: var(--c-white); }
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head .section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  background: rgba(255,77,0,0.08);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-head .section-sub {
  font-size: 16px;
  color: var(--c-text-secondary);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ========== 内容图文区块 ========== */
.content-split {
  display: flex;
  align-items: center;
  gap: 48px;
}
.content-split.reverse { flex-direction: row-reverse; }
.content-split .text-col { flex: 1; }
.content-split .img-col { flex: 1; }
.content-split .img-col img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition);
}
.content-split .img-col:hover img { transform: scale(1.01); }
.content-split h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--c-text);
}
.content-split p {
  color: var(--c-text-secondary);
  line-height: 1.8;
  font-size: 16px;
  margin-bottom: 12px;
}
.content-split p:last-child { margin-bottom: 0; }

/* ========== 运动类型卡片 ========== */
.type-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.type-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.type-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition);
}
.type-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255,77,0,0.4);
}
.type-card:hover::before { transform: scaleX(1); }
.type-card .num {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 800;
  color: rgba(255,77,0,0.14);
  line-height: 1;
  margin-bottom: 18px;
  display: block;
}
.type-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--c-text);
}
.type-card p {
  font-size: 15px;
  color: var(--c-text-secondary);
  line-height: 1.75;
  margin-bottom: 0;
}
.type-card .card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(255,77,0,0.09);
  color: var(--c-accent);
  font-size: 20px;
  margin-bottom: 20px;
}

/* ========== 阶段步骤 ========== */
.steps-wrap {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.steps-wrap::before {
  content: "";
  position: absolute;
  top: 36px;
  left: 16%;
  right: 16%;
  height: 1px;
  background: var(--c-border);
  z-index: 0;
}
.step-item {
  text-align: center;
  padding: 24px 16px;
  position: relative;
  z-index: 1;
}
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px; height: 72px;
  border-radius: 50%;
  background: var(--c-primary);
  color: var(--c-accent);
  font-size: 28px;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(18,20,26,0.15);
  transition: transform var(--transition);
}
.step-item:hover .step-icon { transform: translateY(-4px); }
.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--c-text);
}
.step-item p {
  font-size: 15px;
  color: var(--c-text-secondary);
  line-height: 1.7;
  max-width: 240px;
  margin: 0 auto;
}

/* ========== 装备卡片 ========== */
.gear-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.gear-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all var(--transition);
}
.gear-card:hover {
  border-color: rgba(255,77,0,0.35);
  box-shadow: var(--shadow-md);
  background: var(--c-white);
  transform: translateY(-2px);
}
.gear-card .gear-icon {
  font-size: 32px;
  color: var(--c-accent);
  margin-bottom: 14px;
}
.gear-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}
.gear-card p {
  font-size: 14px;
  color: var(--c-text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ========== FAQ ========== */
.faq-wrap { max-width: 760px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  background: var(--c-white);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.active {
  border-color: rgba(255,77,0,0.4);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  gap: 16px;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--c-accent); }
.faq-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--c-bg);
  color: var(--c-text-secondary);
  font-size: 16px;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.faq-item.active .faq-icon {
  background: var(--c-accent);
  color: #fff;
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer {
  max-height: 400px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-text-secondary);
  margin-bottom: 0;
  border-top: 1px solid var(--c-border);
  padding-top: 14px;
}

/* ========== CTA ========== */
.cta-section {
  background: var(--c-primary);
  padding: 72px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -10%;
  width: 360px; height: 360px;
  background: rgba(255,77,0,0.08);
  border-radius: 50%;
}
.cta-section .cta-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 14px;
}
.cta-section p {
  color: rgba(255,255,255,0.75);
  font-size: 16px;
  max-width: 460px;
  margin: 0 auto 32px;
}
.cta-btns { display: flex; justify-content: center; gap: 16px; }

/* ========== Footer ========== */
.site-footer {
  background: var(--c-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.footer-brand span { color: var(--c-accent); }
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 300px;
  margin-bottom: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  transition: color var(--transition), padding-left var(--transition);
}
.footer-col ul a:hover {
  color: var(--c-accent);
  padding-left: 4px;
}
.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i { color: var(--c-accent); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}

/* ========== 动画 ========== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up {
  opacity: 0;
  animation: fadeUp 0.6s ease-out forwards;
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 分隔线 ========== */
.divider {
  height: 1px;
  background: var(--c-border);
  width: 100%;
  margin: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 991px) {
  .nav-left, .nav-right { display: none; }
  .nav-toggle { display: block; }
  .site-header { padding: 14px 0; }
  .brand-logo { left: 50%; transform: translateX(-50%); font-size: 22px; }
  .type-grid { grid-template-columns: 1fr; gap: 16px; }
  .steps-wrap { grid-template-columns: 1fr; gap: 16px; }
  .steps-wrap::before { display: none; }
  .gear-grid { grid-template-columns: 1fr; gap: 16px; }
  .content-split { flex-direction: column !important; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section { padding: 64px 0; }
  .page-hero { min-height: 220px; }
}

@media (max-width: 767px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .page-hero h1 { font-size: 32px; }
  .page-hero p { font-size: 15px; }
  .section-head h2 { font-size: 26px; }
  .cta-btns { flex-direction: column; gap: 12px; align-items: center; }
  .cta-btns .btn-brand, .cta-btns .btn-outline { width: 200px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .step-item { padding: 16px 8px; }
  .type-card, .gear-card { padding: 24px 20px; }
}

@media (max-width: 575px) {
  .page-hero { min-height: 200px; }
  .brand-logo { font-size: 20px; }
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 24px; }
  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-item.active .faq-answer { padding: 0 18px 16px; }
}