/* roulang page: index */
:root {
  --primary: #1B3A5B;
  --primary-light: #2E5D86;
  --accent: #4A9EC7;
  --highlight: #E4A431;
  --bg: #F6F8FA;
  --bg-alt: #EDF2F7;
  --card-bg: #FFFFFF;
  --text-main: #14232F;
  --text-body: #395267;
  --text-weak: #7B8A9A;
  --border: #E2E8F0;
  --line-border: rgba(27, 58, 91, 0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow-card: 0 2px 8px rgba(20, 35, 47, 0.06);
  --shadow-hover: 0 12px 28px rgba(20, 35, 47, 0.10);
  --shadow-nav: 0 6px 24px rgba(20, 35, 47, 0.06);
  --font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --space-section: clamp(4rem, 8vw, 6.5rem);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.25s ease, opacity 0.25s ease; }
a:hover { color: var(--primary-light); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid rgba(228, 164, 49, 0.55);
  outline-offset: 2px;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-alt { background-color: var(--bg-alt); }
.text-weak { color: var(--text-weak); }
.text-body { color: var(--text-body); }

/* ===== Navigation ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255,255,255,0.18);
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.site-header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(27,58,91,0.08);
  box-shadow: var(--shadow-nav);
}
.site-header.scrolled .header-inner a.nav-logo,
.site-header.scrolled .header-inner nav.main-nav a { color: var(--text-main); }
.site-header.scrolled .header-inner nav.main-nav a:hover { color: var(--primary); }
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav-logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: color 0.3s ease;
}
.nav-logo i { color: var(--highlight); font-size: 1.2rem; }
.site-header.scrolled .nav-logo { color: var(--text-main); }
.main-nav { display: flex; align-items: center; gap: 28px; margin: 0; list-style: none; }
.main-nav a {
  color: rgba(255,255,255,0.92);
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 6px 2px;
  position: relative;
  transition: color 0.2s ease;
}
.site-header.scrolled .main-nav a { color: var(--text-body); }
.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}
.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; }
.main-nav a.active { color: var(--accent); }
.site-header.scrolled .main-nav a.active { color: var(--accent); }
.nav-actions { display: flex; align-items: center; gap: 14px; }
.nav-search-btn {
  background: none; border: none;
  color: rgba(255,255,255,0.9);
  font-size: 1.05rem;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.site-header.scrolled .nav-search-btn { color: var(--text-main); }
.nav-search-btn:hover { background: rgba(27,58,91,0.06); color: var(--accent); }
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--highlight);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.btn-nav-cta:hover { background: #c98e1f; color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(228,164,49,0.35); }
.hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; border-radius: 4px; color: #fff; }
.site-header.scrolled .hamburger { color: var(--text-main); }
.hamburger i { font-size: 1.3rem; }
.mobile-nav {
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 0;
  z-index: 999;
  box-shadow: var(--shadow-nav);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.mobile-nav.open { max-height: 400px; }
.mobile-nav ul { list-style: none; margin: 0; padding: 12px 0; }
.mobile-nav li a {
  display: block; padding: 12px 24px;
  font-size: 1rem; font-weight: 500;
  color: var(--text-main); border-left: 3px solid transparent;
}
.mobile-nav li a:hover, .mobile-nav li a.active { border-left-color: var(--accent); color: var(--accent); background: var(--bg-alt); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: min(92vh, 980px);
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
  padding: 120px 0 80px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(20,35,47,0.82) 0%, rgba(20,35,47,0.50) 45%, rgba(20,35,47,0.15) 80%);
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.28);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}
.hero-badge i { color: var(--highlight); }
.hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  max-width: 14em;
  margin-bottom: 18px;
  letter-spacing: 0.01em;
}
.hero h1 span { color: var(--highlight); }
.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.9);
  max-width: 56ch;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  min-height: 46px;
}
.btn-primary {
  background: var(--highlight);
  color: #fff;
  border-color: var(--highlight);
}
.btn-primary:hover { background: #c98e1f; border-color: #c98e1f; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(228,164,49,0.3); color: #fff; }
.btn-secondary {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn-secondary:hover { border-color: #fff; background: rgba(255,255,255,0.1); color: #fff; transform: translateY(-2px); }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.2);
}
.hero-meta-item { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.85); font-size: 0.875rem; }
.hero-meta-item i { color: var(--highlight); font-size: 1rem; }

/* ===== Section Headings ===== */
.section-head { margin-bottom: 48px; }
.section-head .overline {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  background: rgba(74,158,199,0.1);
  padding: 4px 14px;
  border-radius: 4px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.35;
}
.section-head p {
  color: var(--text-body);
  max-width: 42em;
  font-size: 1rem;
}
.section-head .more-link {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.9375rem;
}

/* ===== Horizontal Scroll Card Library ===== */
.library-section { background: var(--bg-alt); }
.library-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; flex-wrap: wrap; gap: 16px; }
.library-header .section-head { margin-bottom: 0; }
.library-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 8px 4px 20px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.library-scroll::-webkit-scrollbar { display: none; }
.library-card {
  flex: 0 0 260px;
  scroll-snap-align: start;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--line-border);
  display: flex;
  flex-direction: column;
}
.library-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.library-card .card-cover { position: relative; aspect-ratio: 16/9; overflow: hidden; background: var(--bg-alt); }
.library-card .card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.library-card:hover .card-cover img { transform: scale(1.03); }
.card-badge {
  position: absolute;
  top: 10px; left: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 10px;
  border-radius: 4px;
  letter-spacing: 0.02em;
  z-index: 1;
}
.card-body { padding: 16px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 1.0625rem; font-weight: 600; color: var(--text-main); margin-bottom: 8px; line-height: 1.45; }
.card-body p { font-size: 0.875rem; color: var(--text-body); margin-bottom: 14px; flex: 1; line-height: 1.65; }
.card-meta { display: flex; align-items: center; justify-content: space-between; }
.card-link { font-size: 0.875rem; font-weight: 600; color: var(--accent); display: inline-flex; align-items: center; gap: 6px; }
.card-link:hover { color: var(--primary); }
.card-badge-hot { position: absolute; top: 10px; right: 10px; background: var(--highlight); color: #fff; font-size: 0.75rem; padding: 2px 10px; border-radius: 4px; font-weight: 600; z-index: 1; }

/* ===== Hot Recommendations ===== */
.hot-section {}
.hot-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.hot-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
}
.hot-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(46,93,134,0.3); }
.hot-card .card-cover { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--bg-alt); }
.hot-card .card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.hot-card:hover .card-cover img { transform: scale(1.04); }
.hot-rank {
  position: absolute;
  top: 8px; left: 10px;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255,255,255,0.7);
  background: rgba(20,35,47,0.45);
  padding: 2px 10px;
  border-radius: 6px;
  line-height: 1.3;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.hot-body { padding: 18px 20px 20px; flex: 1; display: flex; flex-direction: column; }
.hot-body h3 { font-size: 1.0625rem; font-weight: 600; color: var(--text-main); margin-bottom: 8px; line-height: 1.4; }
.hot-body p { font-size: 0.875rem; color: var(--text-body); margin-bottom: 12px; flex: 1; line-height: 1.65; }
.hot-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8125rem; color: var(--text-weak); border-top: 1px solid var(--bg-alt); padding-top: 12px; }
.hot-meta span { display: inline-flex; align-items: center; gap: 4px; }

/* ===== Column Picks ===== */
.picks-section {}
.tabs-picks { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.tab-btn {
  background: transparent;
  border: 1px solid var(--border);
  padding: 8px 20px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 100px;
  cursor: pointer;
  color: var(--text-body);
  transition: all 0.25s ease;
}
.tab-btn:hover { border-color: var(--accent); color: var(--accent); }
.tab-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.picks-list { display: flex; flex-direction: column; gap: 20px; }
.pick-item {
  display: flex;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line-border);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.pick-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.pick-thumb { flex: 0 0 160px; aspect-ratio: 16/10; overflow: hidden; background: var(--bg-alt); }
.pick-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.pick-item:hover .pick-thumb img { transform: scale(1.05); }
.pick-content { flex: 1; padding: 20px 24px; display: flex; flex-direction: column; justify-content: center; }
.pick-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  background: rgba(74,158,199,0.1);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
  align-self: flex-start;
  font-weight: 500;
}
.pick-content h3 { font-size: 1.125rem; font-weight: 600; color: var(--text-main); margin-bottom: 6px; }
.pick-content p { font-size: 0.875rem; color: var(--text-body); margin-bottom: 10px; max-width: 60ch; }
.pick-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8125rem; color: var(--text-weak); }
.view-all-row { text-align: right; margin-top: 28px; }

/* ===== CTA Form Section ===== */
.cta-section {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
  padding: var(--space-section) 0;
  color: #fff;
}
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(20,35,47,0.85); }
.cta-inner { position: relative; z-index: 2; max-width: 1200px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.cta-content h2 { font-size: clamp(1.6rem, 2.6vw, 2.2rem); font-weight: 700; margin-bottom: 16px; line-height: 1.35; }
.cta-content h2 span { color: var(--highlight); }
.cta-content p { color: rgba(255,255,255,0.85); line-height: 1.8; margin-bottom: 28px; max-width: 48ch; }
.cta-steps { display: flex; flex-direction: column; gap: 16px; }
.cta-step { display: flex; align-items: flex-start; gap: 14px; }
.cta-step .num {
  flex: 0 0 36px;
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--highlight);
  font-size: 0.875rem;
}
.cta-step .txt { font-size: 0.9375rem; color: rgba(255,255,255,0.92); }
.form-card {
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 16px 40px rgba(0,0,0,0.2);
}
.form-card h3 { font-size: 1.25rem; margin-bottom: 6px; color: #fff; }
.form-card .form-sub { font-size: 0.875rem; color: rgba(255,255,255,0.75); margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.8125rem; font-weight: 500; color: rgba(255,255,255,0.85); margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #D3DCE6;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--text-main);
  background: #fff;
  transition: border-color 0.25s, box-shadow 0.25s;
  font-family: inherit;
}
.form-group textarea { resize: vertical; min-height: 90px; }
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--highlight);
  box-shadow: 0 0 0 3px rgba(228,164,49,0.25);
  outline: none;
}
.form-group input::placeholder, .form-group textarea::placeholder { color: #a0b0bf; }
.checkbox-group { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 18px; font-size: 0.8125rem; color: rgba(255,255,255,0.8); }
.checkbox-group input { margin-top: 5px; width: auto; }
.btn-submit {
  width: 100%;
  background: var(--highlight);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-submit:hover { background: #c98e1f; transform: translateY(-1px); box-shadow: 0 8px 20px rgba(228,164,49,0.35); }
.form-hint { text-align: center; font-size: 0.75rem; color: rgba(255,255,255,0.6); margin-top: 12px; }

/* ===== News List ===== */
.news-section {}
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.news-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line-border);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.news-card .news-tag { display: inline-block; font-size: 0.75rem; color: var(--accent); background: rgba(74,158,199,0.1); padding: 2px 10px; border-radius: 4px; margin-bottom: 12px; align-self: flex-start; font-weight: 500; }
.news-card h3 { font-size: 1.0625rem; font-weight: 600; color: var(--text-main); margin-bottom: 10px; line-height: 1.45; }
.news-card h3 a { color: var(--text-main); }
.news-card h3 a:hover { color: var(--accent); }
.news-card .news-excerpt { font-size: 0.875rem; color: var(--text-body); margin-bottom: 16px; flex: 1; }
.news-card .news-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.8125rem; color: var(--text-weak); border-top: 1px solid var(--bg-alt); padding-top: 14px; }
.empty-state {
  text-align: center;
  padding: 60px 24px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  grid-column: 1 / -1;
}
.empty-state i { font-size: 2.5rem; color: var(--border); margin-bottom: 16px; }
.empty-state p { color: var(--text-weak); font-size: 0.9375rem; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-alt); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  margin-bottom: 14px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line-border);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-family: inherit;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--accent); }
.faq-question .faq-icon { flex-shrink: 0; width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1.125rem; font-weight: 400; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer-inner { padding: 0 24px 20px; color: var(--text-body); font-size: 0.9375rem; line-height: 1.75; max-width: 80ch; }
.faq-item.open .faq-answer { max-height: 400px; }

/* ===== Footer ===== */
.site-footer { background: #14232F; color: #CFDCE8; padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; }
.footer-brand .footer-logo { font-size: 1.35rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .footer-logo i { color: var(--highlight); }
.footer-brand p { font-size: 0.875rem; line-height: 1.75; color: #aabbc8; max-width: 32em; }
.footer-col h4 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 18px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: #CFDCE8; font-size: 0.875rem; transition: color 0.2s; }
.footer-col ul a:hover { color: var(--accent); }
.footer-contact { font-size: 0.875rem; }
.footer-contact ul li { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; color: #CFDCE8; }
.footer-contact ul li i { color: var(--accent); width: 18px; text-align: center; flex-shrink: 0; }
.footer-copyright {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: #7e95a8;
}
.footer-copyright a { color: #aabbc8; }
.footer-copyright a:hover { color: #fff; }

/* ===== Scroll Top ===== */
.scroll-top {
  position: fixed;
  bottom: 30px; right: 30px;
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 900;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}
.scroll-top.visible { display: flex; }
.scroll-top:hover { background: var(--primary-light); transform: translateY(-3px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hot-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cta-inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .header-inner { padding: 0 16px; }
  .main-nav, .nav-search-btn, .btn-nav-cta { display: none; }
  .hamburger { display: block; }
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero h1 { font-size: 2rem; }
  .hero-sub { font-size: 1rem; }
  .hero-meta { flex-direction: column; gap: 12px; }
  .hot-grid { grid-template-columns: 1fr; }
  .pick-thumb { flex: 0 0 100%; aspect-ratio: 16/9; }
  .pick-item { flex-direction: column; }
  .pick-content { padding: 16px 18px; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn-submit { min-height: 52px; }
  .library-card { flex: 0 0 240px; }
  .tab-btn { padding: 6px 14px; font-size: 0.8125rem; }
  .form-card { padding: 20px; }
  .cta-inner { padding: 0 16px; }
  .scroll-top { right: 16px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* roulang page: article */
/* ============ 设计变量 ============ */
        :root {
            --primary: #1B3A5B;
            --primary-light: #2E5D86;
            --accent: #4A9EC7;
            --highlight: #E4A431;
            --bg: #F6F8FA;
            --bg-alt: #EDF2F7;
            --card: #FFFFFF;
            --text: #14232F;
            --text-secondary: #395267;
            --text-muted: #7B8A9A;
            --border: #E2E8F0;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-sm: 0 2px 8px rgba(20, 35, 47, 0.06);
            --shadow-md: 0 8px 20px rgba(20, 35, 47, 0.08);
            --shadow-lg: 0 12px 28px rgba(20, 35, 47, 0.10);
            --font-stack: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
            --transition: 0.25s ease;
        }

        /* ============ 基础重置 ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html,
        body {
            margin: 0;
            padding: 0;
        }

        body {
            font-family: var(--font-stack);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        a:hover,
        a:focus {
            color: var(--primary-light);
        }

        a:focus,
        button:focus,
        input:focus,
        textarea:focus {
            outline: 3px solid rgba(74, 158, 199, 0.35);
            outline-offset: 2px;
        }

        ul,
        ol {
            padding-left: 1.5rem;
        }

        /* ============ 容器 ============ */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ============ 按钮 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-size: 0.9375rem;
            font-weight: 600;
            line-height: 1.4;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-light);
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 58, 91, 0.22);
        }

        .btn-accent {
            background: var(--highlight);
            color: #FFFFFF;
        }

        .btn-accent:hover,
        .btn-accent:focus {
            background: #c9942b;
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(228, 164, 49, 0.30);
        }

        .btn-outline {
            border-color: rgba(27, 58, 91, 0.25);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover,
        .btn-outline:focus {
            border-color: var(--primary-light);
            color: var(--primary-light);
            background: rgba(27, 58, 91, 0.04);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.875rem;
        }

        /* ============ 顶部导航 ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.18);
            transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(27, 58, 91, 0.08);
            box-shadow: 0 6px 24px rgba(20, 35, 47, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #FFFFFF;
            text-decoration: none;
            letter-spacing: 0.02em;
            transition: color var(--transition);
            flex-shrink: 0;
        }

        .brand-logo i {
            font-size: 1.1rem;
            color: var(--highlight);
        }

        .site-header.scrolled .brand-logo {
            color: var(--primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            color: rgba(255, 255, 255, 0.88);
            font-size: 0.9375rem;
            font-weight: 500;
            text-decoration: none;
            padding: 4px 0;
            position: relative;
            transition: color var(--transition);
        }

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

        .main-nav a::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: width 0.25s ease;
        }

        .main-nav a:hover {
            color: #FFFFFF;
        }

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

        .main-nav a.active {
            color: var(--highlight);
            font-weight: 600;
        }

        .site-header.scrolled .main-nav a:hover {
            color: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-trigger {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: rgba(255, 255, 255, 0.85);
            background: transparent;
            font-size: 0.9rem;
            cursor: pointer;
            text-decoration: none;
            transition: all var(--transition);
        }

        .site-header.scrolled .search-trigger {
            border-color: rgba(27, 58, 91, 0.18);
            color: var(--text-secondary);
        }

        .search-trigger:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #FFFFFF;
        }

        .site-header.scrolled .search-trigger:hover {
            background: rgba(27, 58, 91, 0.06);
            color: var(--primary);
        }

        .menu-toggle {
            display: none;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.35);
            border-radius: var(--radius-md);
            background: transparent;
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
        }

        .site-header.scrolled .menu-toggle {
            border-color: rgba(27, 58, 91, 0.18);
            color: var(--text-secondary);
        }

        /* ============ 文章首屏 Hero ============ */
        .article-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            background: var(--primary);
        }

        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.55;
        }

        .article-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(20, 35, 47, 0.88) 0%, rgba(20, 35, 47, 0.55) 55%, rgba(20, 35, 47, 0.30) 100%);
        }

        .article-hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-bottom: 40px;
            padding-top: 140px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 18px;
        }

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

        .breadcrumb a:hover {
            color: #FFFFFF;
        }

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: rgba(255, 255, 255, 0.9);
        }

        .article-heading-card {
            max-width: 860px;
            padding: 0;
        }

        .article-cat-badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            backdrop-filter: blur(6px);
            color: #FFFFFF;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .article-hero h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.9rem);
            line-height: 1.3;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 16px;
            max-width: 800px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.875rem;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--highlight);
            font-size: 0.8rem;
        }

        /* ============ 正文区域 ============ */
        .article-main {
            background: var(--bg);
            padding: 48px 0 60px;
        }

        .article-wrap {
            max-width: 880px;
            margin: 0 auto;
        }

        .article-body {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 48px 56px;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(27, 58, 91, 0.06);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text);
            word-break: break-word;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin: 2.2em 0 0.8em;
            line-height: 1.35;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--bg-alt);
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin: 2em 0 0.75em;
            line-height: 1.4;
        }

        .article-body p {
            margin: 0 0 1.25em;
        }

        .article-body img {
            border-radius: 10px;
            border: 1px solid var(--border);
            margin: 1.6em 0;
            width: 100%;
            height: auto;
        }

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

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

        .article-body blockquote {
            border-left: 4px solid var(--highlight);
            background: var(--bg-alt);
            margin: 1.8em 0;
            padding: 16px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-size: 1.1rem;
            color: var(--text-secondary);
            font-style: normal;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 1.4em 1.2em;
        }

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

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8em 0;
            font-size: 0.925rem;
        }

        .article-body th {
            background: var(--primary);
            color: #FFFFFF;
            font-weight: 600;
            padding: 10px 14px;
            text-align: left;
        }

        .article-body td {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
        }

        .article-body tr:nth-child(even) {
            background: var(--bg);
        }

        .article-body strong {
            font-weight: 600;
            color: var(--primary);
        }

        /* 标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
        }

        .tag-item {
            display: inline-block;
            padding: 6px 14px;
            background: var(--bg-alt);
            border-radius: 999px;
            font-size: 0.8125rem;
            color: var(--text-secondary);
            border: 1px solid var(--border);
        }

        .tag-item:hover {
            background: var(--accent);
            color: #FFFFFF;
            border-color: var(--accent);
        }

        /* 文章操作 */
        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 36px;
        }

        /* 未找到 */
        .not-found {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 80px 40px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            min-height: 300px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            background: var(--bg-alt);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.75rem;
            color: var(--accent);
        }

        .not-found h2 {
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
            max-width: 420px;
        }

        /* ============ 相关阅读 ============ */
        .related-section {
            padding: 70px 0 40px;
            background: var(--bg);
        }

        .section-head {
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 2.6vw, 2rem);
            color: var(--primary);
            margin-bottom: 6px;
            font-weight: 700;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 0.9375rem;
        }

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

        .related-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(27, 58, 91, 0.08);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(46, 93, 134, 0.3);
        }

        .related-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .related-cover .related-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--highlight);
            color: #FFFFFF;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }

        .related-info {
            padding: 20px;
        }

        .related-info .related-cat {
            font-size: 0.78rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .related-info h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin: 8px 0 8px;
            line-height: 1.5;
            transition: color var(--transition);
        }

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

        .related-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0 0 12px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-info .related-link {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .related-info .related-link:hover {
            color: var(--primary);
        }

        /* ============ CTA ============ */
        .article-cta {
            padding: 50px 0 70px;
            background: var(--bg);
        }

        .cta-inner {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: "";
            position: absolute;
            right: -40px;
            top: -40px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
        }

        .cta-text {
            max-width: 600px;
        }

        .cta-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 10px;
        }

        .cta-text p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9375rem;
            line-height: 1.7;
            margin: 0;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #14232F;
            color: #CFDCE8;
            padding-top: 60px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-logo i {
            color: var(--highlight);
        }

        .footer-brand p {
            font-size: 0.875rem;
            color: #9FB2C4;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 300px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

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

        .footer-col a {
            color: #9FB2C4;
            font-size: 0.875rem;
            text-decoration: none;
            transition: color var(--transition);
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: #9FB2C4;
        }

        .footer-contact i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-copyright p {
            margin: 0;
            font-size: 0.8125rem;
            color: #8CA0B3;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

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

            .main-nav {
                gap: 18px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .brand-logo {
                font-size: 1.1rem;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(16px);
                display: flex;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                gap: 4px;
                box-shadow: 0 12px 30px rgba(20, 35, 47, 0.10);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.3s ease, opacity 0.3s ease;
                border-bottom: 1px solid var(--border);
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
            }

            .main-nav a {
                color: var(--text-secondary);
                font-size: 1rem;
                padding: 12px 8px;
                border-bottom: 1px solid rgba(27, 58, 91, 0.05);
            }

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

            .main-nav a.active {
                color: var(--primary);
                font-weight: 600;
                background: var(--bg-alt);
                border-radius: var(--radius-md);
            }

            .search-trigger {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .article-hero {
                min-height: 340px;
            }

            .article-hero-content {
                padding-top: 120px;
            }

            .article-body {
                padding: 28px 24px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .btn {
                padding: 10px 20px;
            }

            .article-actions .btn {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .article-body {
                padding: 24px 18px;
                font-size: 0.9375rem;
            }

            .article-meta {
                gap: 12px;
                font-size: 0.8125rem;
            }

            .article-meta span:nth-child(3) {
                display: none;
            }

            .related-info {
                padding: 16px;
            }

            .cta-inner {
                padding: 28px 18px;
            }

            .cta-text h3 {
                font-size: 1.2rem;
            }
        }

        /* 减少动效 */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #1B3A5B;
  --primary-light: #2E5D86;
  --accent: #4A9EC7;
  --highlight: #E4A431;
  --bg: #F6F8FA;
  --bg-alt: #EDF2F7;
  --card: #FFFFFF;
  --text: #14232F;
  --text-2: #395267;
  --text-3: #7B8A9A;
  --border: #E2E8F0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 8px rgba(20, 35, 47, 0.06);
  --shadow-hover: 0 12px 28px rgba(20, 35, 47, 0.10);
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --trans: 0.25s ease;
  --section-space: clamp(4rem, 8vw, 6.5rem);
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-light); }
ul, ol { margin: 0; padding: 0; list-style: none; }
button, input, textarea { font-family: inherit; font-size: 1rem; }
:focus-visible {
  outline: 3px solid rgba(228, 164, 49, 0.5);
  outline-offset: 2px;
  border-radius: 4px;
}
.grid-container { max-width: 1200px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.925rem;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-outline { border-color: var(--primary-light); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-highlight { background: var(--highlight); color: #fff; }
.btn-highlight:hover { background: #d08f1f; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: #f0f4f8; color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-sm { padding: 0.55rem 1.1rem; font-size: 0.85rem; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(27, 58, 91, 0.08);
  box-shadow: 0 6px 24px rgba(20, 35, 47, 0.06);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  transition: color 0.3s ease;
}
.site-logo i { color: var(--highlight); }
.site-header.scrolled .site-logo { color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative;
  display: inline-block;
  padding: 8px 14px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 14px; right: 14px; bottom: 3px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}
.main-nav a:hover::after,
.main-nav a.active::after { transform: scaleX(1); }
.main-nav a:hover { color: #fff; }
.main-nav a.active { color: #fff; font-weight: 600; }
.site-header.scrolled .main-nav a { color: var(--primary); }
.site-header.scrolled .main-nav a:hover,
.site-header.scrolled .main-nav a.active { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.site-header.scrolled .icon-btn { border-color: rgba(27, 58, 91, 0.2); color: var(--primary); }
.icon-btn:hover { background: rgba(255, 255, 255, 0.15); color: #fff; }
.site-header.scrolled .icon-btn:hover { background: var(--bg-alt); color: var(--primary); }
.nav-toggle {
  display: none;
  width: 38px; height: 38px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.site-header.scrolled .nav-toggle { border-color: rgba(27, 58, 91, 0.2); color: var(--primary); }
.nav-toggle:hover { background: rgba(255, 255, 255, 0.15); }
.site-header.scrolled .nav-toggle:hover { background: var(--bg-alt); }
.search-wrap { position: relative; }
.search-drop {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 260px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  border: 1px solid var(--border);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 50;
}
.search-drop.open { opacity: 1; visibility: visible; transform: translateY(0); }
.search-drop input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.875rem;
  background: var(--bg);
  color: var(--text);
}

/* ---------- Hero ---------- */
.category-hero {
  position: relative;
  min-height: 72vh;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
  padding: 140px 0 100px;
  color: #fff;
}
.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(20, 35, 47, 0.82) 0%, rgba(20, 35, 47, 0.58) 45%, rgba(20, 35, 47, 0.22) 100%);
}
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 40px;
  letter-spacing: 0.03em;
  margin-bottom: 18px;
}
.category-hero h1 {
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 18px;
  max-width: 680px;
  color: #fff;
}
.category-hero .hero-sub {
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.92);
  max-width: 56ch;
  margin: 0 0 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 40px; }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.stat-item { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--highlight);
  line-height: 1.2;
}
.stat-label { font-size: 0.8rem; color: rgba(255, 255, 255, 0.78); }

/* ---------- Sections ---------- */
.section { padding: var(--section-space) 0; }
.section-alt { background: var(--bg-alt); }
.section-white { background: #fff; }
.section-head { max-width: 700px; margin: 0 auto 48px; text-align: center; }
.section-tag {
  display: inline-block;
  background: rgba(74, 158, 199, 0.12);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 4px;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 2.6vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  margin: 0 0 12px;
  line-height: 1.35;
}
.section-head p { color: var(--text-2); font-size: 0.95rem; margin: 0; }

/* ---------- Category Intro ---------- */
.intro-wrap {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid rgba(27, 58, 91, 0.08);
  padding: 48px;
}
.intro-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 16px;
  line-height: 1.4;
}
.intro-text { color: var(--text-2); font-size: 0.95rem; margin: 0 0 28px; }
.intro-points { display: flex; flex-direction: column; gap: 16px; }
.intro-point {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
}
.intro-point i {
  font-size: 1rem;
  color: var(--accent);
  margin-top: 4px;
  width: 20px;
  text-align: center;
}
.intro-point .point-title { font-weight: 600; font-size: 0.95rem; color: var(--text); margin: 0 0 2px; }
.intro-point .point-desc { font-size: 0.85rem; color: var(--text-2); margin: 0; line-height: 1.6; }

/* ---------- Core Areas 2x2 ---------- */
.area-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(27, 58, 91, 0.08);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.area-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46, 93, 134, 0.3);
}
.card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--bg-alt);
}
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.45s ease; }
.area-card:hover .card-img img { transform: scale(1.03); }
.card-badge {
  position: absolute;
  top: 14px; left: 14px;
  z-index: 2;
  background: rgba(27, 58, 91, 0.88);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 4px;
  letter-spacing: 0.03em;
}
.card-body { padding: 22px 20px 20px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 1.15rem; font-weight: 700; color: var(--text); margin: 0 0 8px; line-height: 1.4; }
.card-body p { font-size: 0.875rem; color: var(--text-2); margin: 0 0 18px; line-height: 1.65; flex: 1; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.2s ease, color 0.2s ease;
}
.card-link:hover { gap: 10px; color: var(--primary); }

/* ---------- Process List ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.process-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid rgba(27, 58, 91, 0.08);
  box-shadow: var(--shadow);
  border-top: 3px solid var(--accent);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.process-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.process-num {
  font-size: 2.4rem;
  font-weight: 800;
  color: rgba(27, 58, 91, 0.14);
  line-height: 1;
  margin-bottom: 14px;
}
.process-item h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin: 0 0 8px; }
.process-item p { font-size: 0.85rem; color: var(--text-2); margin: 0; line-height: 1.65; }

/* ---------- CTA Strip ---------- */
.cta-strip {
  background: linear-gradient(120deg, rgba(27, 58, 91, 0.94), rgba(20, 35, 47, 0.97)), url('/assets/images/backpic/back-1.png') center / cover;
  border-radius: var(--radius-lg);
  padding: clamp(32px, 5vw, 56px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-strip h3 { font-size: 1.5rem; font-weight: 700; margin: 0 0 8px; color: #fff; }
.cta-strip p { margin: 0; color: rgba(255, 255, 255, 0.82); font-size: 0.92rem; max-width: 520px; line-height: 1.7; }
.cta-strip .btn { flex-shrink: 0; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 8px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-icon {
  flex-shrink: 0;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 0.75rem;
  transition: background 0.25s ease, color 0.25s ease, transform 0.25s ease;
}
.faq-item.open .faq-icon { background: var(--accent); color: #fff; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 8px;
}
.faq-item.open .faq-a { max-height: 320px; padding: 0 8px 20px; }
.faq-a p { margin: 0; font-size: 0.9rem; color: var(--text-2); line-height: 1.7; max-width: 80ch; }

/* ---------- Footer ---------- */
.site-footer {
  background: #14232F;
  color: #CFDCE8;
  padding: 64px 0 30px;
  margin-top: var(--section-space);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-logo i { color: var(--highlight); }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; color: #93A7B8; margin: 0; max-width: 300px; }
.site-footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 16px;
}
.site-footer ul { display: flex; flex-direction: column; gap: 10px; }
.site-footer ul a {
  color: #CFDCE8;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}
.site-footer ul a:hover { color: var(--accent); }
.site-footer .footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: #CFDCE8;
  line-height: 1.6;
}
.site-footer .footer-contact i { color: var(--accent); width: 16px; text-align: center; }
.footer-copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: #8FA4B8;
}
.footer-copyright p { margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .main-nav { gap: 0; }
  .main-nav a { padding: 8px 10px; font-size: 0.85rem; }
  .header-inner { padding: 0 20px; gap: 14px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(20, 35, 47, 0.08);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav a { color: var(--primary); padding: 12px 14px; font-size: 0.95rem; border-radius: 8px; }
  .main-nav a:hover { background: var(--bg-alt); }
  .main-nav a.active { background: rgba(74, 158, 199, 0.12); color: var(--primary); }
  .main-nav a::after { display: none; }
  .header-actions .btn { display: none; }
  .site-header.scrolled .main-nav a { color: var(--primary); }
  .category-hero { min-height: auto; padding: 120px 0 72px; }
  .hero-stats { gap: 24px; }
  .process-grid { grid-template-columns: 1fr; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-strip { flex-direction: column; text-align: center; }
  .cta-strip .btn { width: 100%; }
}
@media (max-width: 520px) {
  .header-inner { padding: 0 16px; }
  .category-hero h1 { font-size: 1.9rem; }
  .hero-sub { font-size: 0.95rem; }
  .hero-actions .btn { width: 100%; }
  .intro-wrap { padding: 28px 20px; }
  .intro-point { flex-direction: column; gap: 6px; padding: 14px; }
  .intro-point i { margin-top: 0; }
  .process-grid { grid-template-columns: 1fr; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 1.5rem; }
  .stat-item { min-width: calc(50% - 20px); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* roulang page: category3 */
/* ===================== 设计变量 ===================== */
    :root {
      --primary: #1B3A5B;
      --primary-light: #2E5D86;
      --accent: #4A9EC7;
      --highlight: #E4A431;
      --bg: #F6F8FA;
      --bg-alt: #EDF2F7;
      --card-bg: #FFFFFF;
      --text: #14232F;
      --text-secondary: #395267;
      --text-muted: #7B8A9A;
      --border: #E2E8F0;
      --radius: 12px;
      --radius-sm: 8px;
      --shadow-sm: 0 2px 8px rgba(20, 35, 47, 0.06);
      --shadow-md: 0 12px 28px rgba(20, 35, 47, 0.10);
      --transition: 0.25s ease;
      --font-stack: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    a:hover,
    a:focus {
      color: var(--primary-light);
    }

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

    ul,
    ol {
      list-style: none;
    }

    /* ===================== 容器 ===================== */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 16px;
      }
    }

    /* ===================== 导航 ===================== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      height: 64px;
      background: rgba(255, 255, 255, 0.08);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      backdrop-filter: blur(20px) saturate(180%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.18);
      transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .site-header.scrolled {
      background: rgba(255, 255, 255, 0.92);
      -webkit-backdrop-filter: blur(16px);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(27, 58, 91, 0.08);
      box-shadow: 0 6px 24px rgba(20, 35, 47, 0.06);
    }

    .header-inner {
      max-width: 1200px;
      margin: 0 auto;
      height: 64px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      gap: 16px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.35rem;
      font-weight: 700;
      color: #fff;
      white-space: nowrap;
      transition: color var(--transition);
      flex-shrink: 0;
    }

    .brand-logo i {
      color: var(--highlight);
      font-size: 1.2rem;
    }

    .site-header.scrolled .brand-logo {
      color: var(--primary);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
      margin-left: auto;
    }

    .main-nav a {
      font-size: 0.95rem;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.9);
      padding: 6px 2px;
      position: relative;
      transition: color var(--transition);
      white-space: nowrap;
    }

    .main-nav a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: width var(--transition);
    }

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

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

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

    .site-header.scrolled .main-nav a:hover,
    .site-header.scrolled .main-nav a.active {
      color: var(--primary);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .icon-btn {
      background: transparent;
      border: none;
      color: #fff;
      width: 36px;
      height: 36px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: background var(--transition), color var(--transition);
    }

    .icon-btn:hover {
      background: rgba(255, 255, 255, 0.15);
    }

    .site-header.scrolled .icon-btn {
      color: var(--primary);
    }

    .site-header.scrolled .icon-btn:hover {
      background: var(--bg-alt);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      border: none;
      border-radius: var(--radius-sm);
      padding: 10px 20px;
      font-size: 0.92rem;
      font-weight: 600;
      cursor: pointer;
      transition: all var(--transition);
      text-decoration: none;
      line-height: 1.4;
    }

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

    .btn-primary:hover,
    .btn-primary:focus {
      background: var(--primary-light);
      color: #fff;
      box-shadow: 0 4px 16px rgba(27, 58, 91, 0.3);
    }

    .btn-highlight {
      background: var(--highlight);
      color: #fff;
    }

    .btn-highlight:hover,
    .btn-highlight:focus {
      background: #d19a2a;
      color: #fff;
      box-shadow: 0 4px 16px rgba(228, 164, 49, 0.35);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.6);
      color: #fff;
    }

    .btn-outline:hover,
    .btn-outline:focus {
      border-color: #fff;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
    }

    .btn-sm {
      padding: 8px 16px;
      font-size: 0.85rem;
    }

    .btn:focus-visible,
    .icon-btn:focus-visible,
    .main-nav a:focus-visible {
      outline: 3px solid rgba(228, 164, 49, 0.5);
      outline-offset: 2px;
    }

    .hamburger {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      width: 36px;
      height: 36px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      border-radius: 8px;
      transition: background var(--transition);
    }

    .hamburger span {
      display: block;
      width: 20px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: transform var(--transition), opacity var(--transition);
    }

    .site-header.scrolled .hamburger span {
      background: var(--primary);
    }

    /* ===================== 页面 Hero Banner ===================== */
    .page-hero {
      position: relative;
      min-height: 360px;
      display: flex;
      align-items: center;
      background-image: linear-gradient(90deg, rgba(27, 58, 91, 0.92) 0%, rgba(27, 58, 91, 0.75) 45%, rgba(27, 58, 91, 0.4) 100%), url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      color: #fff;
      padding: 140px 0 80px;
      margin-top: 0;
    }

    .page-hero::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: linear-gradient(to bottom, rgba(246, 248, 250, 0), var(--bg));
      pointer-events: none;
    }

    .page-hero .hero-content {
      position: relative;
      z-index: 2;
      max-width: 760px;
    }

    .page-hero .breadcrumb {
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.75);
      margin-bottom: 14px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .page-hero .breadcrumb a {
      color: rgba(255, 255, 255, 0.85);
    }

    .page-hero .breadcrumb a:hover {
      color: var(--highlight);
    }

    .page-hero h1 {
      font-size: clamp(2.1rem, 4vw, 3rem);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 16px;
      letter-spacing: 0.02em;
    }

    .page-hero .hero-sub {
      font-size: 1.05rem;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.92);
      max-width: 56ch;
    }

    /* ===================== 板块通用 ===================== */
    .section {
      padding: clamp(4rem, 8vw, 6.5rem) 0;
    }

    .section-alt {
      background: var(--bg-alt);
    }

    .section-head {
      margin-bottom: 40px;
      max-width: 720px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-head h2 {
      font-size: clamp(1.6rem, 2.6vw, 2.2rem);
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-head p {
      color: var(--text-secondary);
      font-size: 1rem;
      line-height: 1.7;
    }

    .section-divider {
      width: 48px;
      height: 3px;
      background: var(--highlight);
      border-radius: 3px;
      margin-bottom: 16px;
    }

    .section-divider.center {
      margin-left: auto;
      margin-right: auto;
    }

    /* ===================== 交替大卡模块 ===================== */
    .swing-block {
      margin-bottom: clamp(3rem, 6vw, 4.5rem);
    }

    .swing-block:last-child {
      margin-bottom: 0;
    }

    .swing-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(27, 58, 91, 0.06);
      transition: box-shadow var(--transition), transform var(--transition);
      height: 100%;
    }

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

    .swing-card .card-media {
      position: relative;
      overflow: hidden;
      min-height: 260px;
      background: var(--bg-alt);
    }

    .swing-card .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .swing-card .card-body {
      padding: 32px;
    }

    .swing-card .card-body h3 {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .swing-card .card-body>p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .swing-card .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px solid var(--border);
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .swing-card .feature-list li:last-child {
      border-bottom: none;
    }

    .swing-card .feature-list i {
      color: var(--highlight);
      margin-top: 4px;
      font-size: 0.95rem;
      flex-shrink: 0;
    }

    .swing-card .feature-list strong {
      color: var(--text);
      font-weight: 600;
      display: block;
      font-size: 0.98rem;
    }

    @media (max-width: 1023px) {
      .swing-card .card-media {
        min-height: 220px;
      }
      .swing-card .card-body {
        padding: 24px;
      }
    }

    @media (max-width: 639px) {
      .swing-card .card-media {
        min-height: 180px;
      }
      .swing-card .card-body {
        padding: 20px;
      }
    }

    /* ===================== 流程步骤 ===================== */
    .steps-wrap {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .step-item {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(27, 58, 91, 0.06);
      transition: box-shadow var(--transition), transform var(--transition);
    }

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

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      font-size: 1.1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
    }

    .step-item h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
    }

    .step-item p {
      font-size: 0.82rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    @media (max-width: 1023px) {
      .steps-wrap {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    @media (max-width: 639px) {
      .steps-wrap {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
      }
      .step-item {
        padding: 18px 12px;
      }
    }

    /* ===================== 数据统计 ===================== */
    .stats-section {
      background: var(--primary);
      color: #fff;
      padding: 60px 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }

    .stat-card {
      padding: 16px;
    }

    .stat-number {
      font-size: clamp(1.8rem, 3vw, 2.6rem);
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 6px;
      color: var(--highlight);
    }

    .stat-label {
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.85);
      line-height: 1.5;
    }

    @media (max-width: 639px) {
      .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
      }
    }

    /* ===================== FAQ ===================== */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius);
      border: 1px solid rgba(27, 58, 91, 0.06);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: box-shadow var(--transition);
    }

    .faq-item:hover {
      box-shadow: var(--shadow-md);
    }

    .faq-item.active {
      border-color: var(--accent);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      padding: 20px 24px;
      background: transparent;
      border: none;
      cursor: pointer;
      text-align: left;
      color: var(--text);
      font-size: 1rem;
      font-weight: 600;
      line-height: 1.5;
    }

    .faq-question:focus-visible {
      outline: 3px solid rgba(228, 164, 49, 0.5);
      outline-offset: -3px;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--bg-alt);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      color: var(--primary);
      flex-shrink: 0;
      transition: background var(--transition), transform var(--transition);
    }

    .faq-icon i {
      transition: transform var(--transition);
    }

    .faq-item.active .faq-icon {
      background: var(--primary);
      color: #fff;
    }

    .faq-item.active .faq-icon .fa-plus {
      display: none;
    }

    .faq-item.active .faq-icon .fa-minus {
      display: inline;
    }

    .faq-icon .fa-minus {
      display: none;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.7;
      max-width: 80ch;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
    }

    /* ===================== CTA 区块 ===================== */
    .cta-section {
      position: relative;
      padding: clamp(3.5rem, 6vw, 5rem) 0;
      background-image: linear-gradient(120deg, rgba(20, 35, 47, 0.94), rgba(27, 58, 91, 0.88)), url('/assets/images/backpic/back-3.webp');
      background-size: cover;
      background-position: center;
      color: #fff;
    }

    .cta-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      flex-wrap: wrap;
    }

    .cta-text h2 {
      font-size: clamp(1.5rem, 2.4vw, 2rem);
      font-weight: 700;
      margin-bottom: 10px;
    }

    .cta-text p {
      color: rgba(255, 255, 255, 0.85);
      max-width: 560px;
      line-height: 1.7;
    }

    .cta-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    @media (max-width: 767px) {
      .cta-inner {
        flex-direction: column;
        text-align: center;
      }
      .cta-actions {
        justify-content: center;
        width: 100%;
      }
      .cta-actions .btn {
        flex: 1;
        min-width: 140px;
      }
    }

    /* ===================== 页脚 ===================== */
    .site-footer {
      background: #14232F;
      color: #CFDCE8;
      padding: 64px 0 0;
      font-size: 0.92rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 1.4rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-logo i {
      color: var(--highlight);
    }

    .footer-brand p {
      color: #A8B8C8;
      line-height: 1.7;
      max-width: 32ch;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 10px;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }

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

    .footer-col ul li a {
      color: #A8B8C8;
      transition: color var(--transition);
    }

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

    .footer-col .contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #A8B8C8;
      margin-bottom: 12px;
    }

    .footer-col .contact-item i {
      color: var(--accent);
      width: 16px;
    }

    .footer-copyright {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 20px 0;
      text-align: center;
      color: #8A9BAB;
      font-size: 0.85rem;
    }

    .footer-copyright p {
      margin: 0;
    }

    @media (max-width: 1023px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 639px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }

    /* ===================== 响应式导航 ===================== */
    @media (max-width: 1023px) {
      .main-nav {
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        -webkit-backdrop-filter: blur(16px);
        backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 12px 24px 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 12px 24px rgba(20, 35, 47, 0.08);
        display: none;
      }

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

      .main-nav a {
        color: var(--text) !important;
        width: 100%;
        padding: 14px 4px;
        border-bottom: 1px solid var(--border);
      }

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

      .main-nav a.active {
        color: var(--accent) !important;
      }

      .hamburger {
        display: flex;
      }

      .header-actions .btn {
        display: none;
      }
    }

    @media (max-width: 639px) {
      .header-inner {
        padding: 0 16px;
      }
      .brand-logo {
        font-size: 1.15rem;
      }
      .header-actions .icon-btn {
        display: none;
      }
    }

    /* ===================== 辅助视觉工具 ===================== */
    .text-center {
      text-align: center;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(74, 158, 199, 0.12);
      color: var(--primary-light);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 4px;
    }

    .badge-highlight {
      background: var(--highlight);
      color: #fff;
    }

    /* 动画降级 */
    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
      html {
        scroll-behavior: auto;
      }
    }

/* roulang page: category2 */
:root {
            --primary: #1B3A5B;
            --primary-light: #2E5D86;
            --accent: #4A9EC7;
            --highlight: #E4A431;
            --bg: #F6F8FA;
            --bg-alt: #EDF2F7;
            --card-bg: #FFFFFF;
            --text: #14232F;
            --text-secondary: #395267;
            --text-muted: #7B8A9A;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-xs: 4px;
            --shadow-sm: 0 2px 8px rgba(20, 35, 47, 0.06);
            --shadow-lg: 0 12px 28px rgba(20, 35, 47, 0.10);
            --transition: 0.25s ease;
            --font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius);
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--primary);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.18);
            transition: background .35s ease, box-shadow .35s ease, border-color .35s ease;
            padding: 0;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-color: rgba(27, 58, 91, 0.08);
            box-shadow: 0 6px 24px rgba(20, 35, 47, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: .5px;
            text-decoration: none;
            transition: color .25s ease;
            flex-shrink: 0;
        }
        .site-logo i {
            color: var(--highlight);
            margin-right: 8px;
            font-size: 1.1rem;
        }
        .site-logo:hover {
            color: #fff;
            opacity: .9;
        }
        .site-header.scrolled .site-logo {
            color: var(--primary);
        }
        .site-header.scrolled .site-logo:hover {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
            margin-right: 20px;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: .92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.92);
            border-radius: 6px;
            line-height: 1.4;
            position: relative;
            transition: color .2s ease, background .2s ease;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--highlight);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform .2s ease;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a:hover::after {
            transform: scaleX(1);
        }
        .main-nav a.active {
            color: var(--highlight);
        }
        .main-nav a.active::after {
            transform: scaleX(1);
        }
        .site-header.scrolled .main-nav a {
            color: var(--text-secondary);
        }
        .site-header.scrolled .main-nav a:hover {
            color: var(--primary);
        }
        .site-header.scrolled .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .site-header.scrolled .main-nav a.active::after {
            background: var(--highlight);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 11px 22px;
            font-size: .92rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .3s ease;
            line-height: 1.4;
            text-decoration: none;
            outline: none;
        }
        .btn-small {
            padding: 7px 16px;
            font-size: .85rem;
            border-radius: 6px;
        }
        .btn-highlight {
            background: var(--highlight);
            color: #fff;
            border-color: var(--highlight);
            box-shadow: 0 4px 14px rgba(228, 164, 49, 0.25);
        }
        .btn-highlight:hover {
            background: #c98f2a;
            border-color: #c98f2a;
            color: #fff;
            box-shadow: 0 6px 20px rgba(228, 164, 49, 0.35);
            transform: translateY(-1px);
        }
        .btn-highlight:focus-visible {
            outline: 3px solid rgba(228, 164, 49, .35);
            outline-offset: 2px;
        }
        .site-header:not(.scrolled) .btn-highlight {
            background: rgba(228, 164, 49, .9);
            border-color: rgba(255, 255, 255, .2);
            box-shadow: 0 4px 14px rgba(0, 0, 0, .15);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(255, 255, 255, .4);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 6px;
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all .25s ease;
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .7);
        }
        .site-header.scrolled .nav-toggle {
            border-color: rgba(27, 58, 91, .3);
            color: var(--primary);
        }
        /* ========== Hero ========== */
        .page-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: linear-gradient(120deg, rgba(27, 58, 91, 0.92), rgba(27, 58, 91, 0.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            padding: 120px 0 60px;
            border-radius: 0 0 24px 24px;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(228, 164, 49, .9);
            color: #fff;
            font-size: .8rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 18px;
        }
        .page-hero h1 {
            font-size: clamp(2.1rem, 4vw, 3.2rem);
            font-weight: 700;
            line-height: 1.25;
            margin: 0 0 18px;
            color: #fff;
            max-width: 18em;
        }
        .page-hero .hero-sub {
            font-size: 1.05rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, .9);
            max-width: 54ch;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--highlight);
            color: #fff;
            border-color: var(--highlight);
            box-shadow: 0 4px 14px rgba(228, 164, 49, .3);
        }
        .btn-primary:hover {
            background: #c98f2a;
            border-color: #c98f2a;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(228, 164, 49, .4);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(228, 164, 49, .4);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .65);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(255, 255, 255, .4);
            outline-offset: 2px;
        }
        /* ========== Stats ========== */
        .stats-section {
            padding: clamp(4rem, 8vw, 6rem) 0 2rem;
            background: var(--bg);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(27, 58, 91, .06);
            transition: transform .3s ease, box-shadow .3s ease;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-number span {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--accent);
            margin-left: 2px;
        }
        .stat-label {
            font-size: .88rem;
            color: var(--text-secondary);
            margin-top: 8px;
        }
        /* ========== Section Headings ========== */
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head .section-tag {
            display: inline-block;
            background: rgba(74, 158, 199, .12);
            color: var(--primary-light);
            font-size: .78rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 10px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: .95rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto;
        }
        /* ========== Masonry Cases ========== */
        .cases-section {
            padding: clamp(3rem, 7vw, 5.5rem) 0;
            background: var(--bg-alt);
        }
        .masonry-grid {
            column-count: 3;
            column-gap: 24px;
        }
        .masonry-card {
            break-inside: avoid;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(27, 58, 91, .06);
            overflow: hidden;
            margin-bottom: 24px;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
        }
        .masonry-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(74, 158, 199, .4);
        }
        .masonry-card .card-cover {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }
        .masonry-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .masonry-card:hover .card-cover img {
            transform: scale(1.03);
        }
        .masonry-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--highlight);
            color: #fff;
            font-size: .72rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 20px;
            letter-spacing: .5px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, .2);
        }
        .masonry-card .card-body {
            padding: 20px;
        }
        .masonry-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .masonry-card p {
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .masonry-card .card-link {
            font-size: .85rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .masonry-card .card-link:hover {
            color: var(--primary);
            gap: 8px;
        }
        /* ========== Scenarios ========== */
        .scenarios-section {
            padding: clamp(3rem, 7vw, 5.5rem) 0;
            background: var(--bg);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            padding: 30px;
            border: 1px solid rgba(27, 58, 91, .06);
            box-shadow: var(--shadow-sm);
            display: flex;
            gap: 20px;
            transition: all .3s ease;
        }
        .scenario-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: rgba(74, 158, 199, .3);
            transform: translateY(-3px);
        }
        .scenario-icon {
            flex-shrink: 0;
            width: 54px;
            height: 54px;
            border-radius: 12px;
            background: rgba(74, 158, 199, .12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }
        .scenario-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--primary);
            margin: 0 0 6px;
        }
        .scenario-card p {
            font-size: .875rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        /* ========== Process ========== */
        .process-section {
            padding: clamp(3rem, 7vw, 5.5rem) 0;
            background: var(--bg-alt);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .process-step {
            text-align: center;
            padding: 30px 20px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(27, 58, 91, .05);
            position: relative;
            transition: all .3s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 16px;
            box-shadow: 0 4px 12px rgba(27, 58, 91, .25);
        }
        .process-step h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 8px;
        }
        .process-step p {
            font-size: .85rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }
        /* ========== FAQ ========== */
        .faq-section {
            padding: clamp(3rem, 7vw, 5.5rem) 0;
            background: var(--bg);
        }
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(27, 58, 91, .06);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow .3s ease;
        }
        .faq-item.active {
            box-shadow: var(--shadow-lg);
            border-color: rgba(74, 158, 199, .25);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            color: var(--text);
            font-weight: 600;
            font-size: .98rem;
            transition: background .25s ease;
        }
        .faq-question:hover {
            background: rgba(74, 158, 199, .04);
        }
        .faq-question:focus-visible {
            outline: 3px solid rgba(74, 158, 199, .35);
            outline-offset: -2px;
            border-radius: var(--radius);
        }
        .faq-question h4 {
            font-size: 1rem;
            margin: 0;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(74, 158, 199, .1);
            color: var(--accent);
            font-size: .8rem;
            transition: all .3s ease;
        }
        .faq-item.active .faq-icon {
            background: var(--highlight);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 80ch;
        }
        .faq-answer p {
            margin: 0;
        }
        /* ========== CTA ========== */
        .cta-section {
            padding: clamp(3rem, 7vw, 5.5rem) 0;
            background: linear-gradient(130deg, rgba(27, 58, 91, .94), rgba(20, 35, 47, .9)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }
        .cta-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cta-copy h2 {
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            line-height: 1.3;
        }
        .cta-copy p {
            font-size: .95rem;
            color: rgba(255, 255, 255, .85);
            max-width: 42ch;
            line-height: 1.7;
        }
        .cta-form-card {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            padding: 28px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: .85rem;
            font-weight: 500;
            color: rgba(255, 255, 255, .8);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid #D3DCE6;
            background: #fff;
            color: var(--text);
            font-size: .9rem;
            transition: border-color .25s ease, box-shadow .25s ease;
            outline: none;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--highlight);
            box-shadow: 0 0 0 3px rgba(228, 164, 49, .2);
        }
        .form-group textarea {
            min-height: 90px;
            resize: vertical;
        }
        .form-check {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            margin-bottom: 18px;
            font-size: .8rem;
            color: rgba(255, 255, 255, .75);
        }
        .form-check input {
            margin-top: 4px;
            accent-color: var(--highlight);
        }
        .btn-submit {
            width: 100%;
            padding: 13px 24px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--highlight);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all .3s ease;
            box-shadow: 0 4px 16px rgba(228, 164, 49, .3);
        }
        .btn-submit:hover {
            background: #c98f2a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(228, 164, 49, .4);
        }
        .btn-submit:focus-visible {
            outline: 3px solid rgba(228, 164, 49, .4);
            outline-offset: 2px;
        }
        /* ========== Footer ========== */
        .site-footer {
            background: #14232F;
            color: #CFDCE8;
            padding: 60px 0 0;
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-brand .footer-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand .footer-logo i {
            color: var(--highlight);
        }
        .footer-brand p {
            font-size: .88rem;
            line-height: 1.75;
            color: #9fb3c4;
            max-width: 34em;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin: 0 0 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #9fb3c4;
            font-size: .88rem;
            text-decoration: none;
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-contact ul li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: .88rem;
            color: #9fb3c4;
        }
        .footer-contact ul li i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }
        .footer-copyright {
            text-align: center;
            padding: 24px 0;
            font-size: .82rem;
            color: #7d93a6;
        }
        .footer-copyright p {
            margin: 0;
        }
        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .masonry-grid {
                column-count: 2;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, .97);
                box-shadow: 0 12px 30px rgba(20, 35, 47, .1);
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 20px 20px;
                gap: 4px;
                border-radius: 0 0 14px 14px;
                transform: translateY(-12px);
                opacity: 0;
                pointer-events: none;
                transition: all .3s ease;
                margin: 0;
                z-index: 999;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                color: var(--text-secondary) !important;
                padding: 10px 14px;
                width: 100%;
            }
            .main-nav a::after {
                display: none;
            }
            .main-nav a.active {
                background: rgba(74, 158, 199, .1);
                color: var(--primary) !important;
                border-radius: 6px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .header-actions .btn-small {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .page-hero {
                min-height: 380px;
                padding: 100px 0 50px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .hero-sub {
                font-size: .95rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 1.9rem;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .section-head {
                margin-bottom: 32px;
            }
        }
        @media (max-width: 520px) {
            .masonry-grid {
                column-count: 1;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .page-hero {
                min-height: 340px;
                padding: 90px 0 40px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }