/* roulang page: index */
:root {
  --color-primary: #0F766E;
  --color-primary-dark: #115E59;
  --color-accent: #C28F1C;
  --color-accent-hover: #D4A23A;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAF9;
  --color-dark: #0D2B2B;
  --color-dark-2: #134E4A;
  --color-text: #1E293B;
  --color-body: #334155;
  --color-muted: #64748B;
  --color-faint: #94A3B8;
  --color-border: #E2E8F0;
  --color-success: #059669;
  --radius-xl: 16px;
  --radius-lg: 12px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 8px 30px rgba(15, 118, 110, 0.12);
  --font-screen: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en: "Inter", "Segoe UI", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-screen);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-body);
  background-color: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 16px; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.section-pad { padding-top: 88px; padding-bottom: 88px; }
.section-pad-sm { padding-top: 64px; padding-bottom: 64px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.section-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 640px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: 72px;
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text .logo-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-left: 2px;
  vertical-align: middle;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: 48px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-muted);
  padding: 8px 2px;
  transition: color .25s ease;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--color-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 0;
  transition: all .25s ease;
}
.nav-cta:hover { color: var(--color-accent); }
.nav-cta .arrow { transition: transform .25s ease; }
.nav-cta:hover .arrow { transform: translateX(4px); }

.mobile-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.mobile-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  margin: 2px auto;
  border-radius: 2px;
  transition: all .3s ease;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(8px);
  z-index: 49;
  padding: 32px 24px;
  overflow-y: auto;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  font-size: 18px;
  font-weight: 500;
  line-height: 2.4;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding: 4px 0;
}
.mobile-menu a.active { color: var(--color-primary); font-weight: 600; }
.mobile-menu a:hover { color: var(--color-primary); }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #F0F7F5 0%, #FAF8F2 100%);
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(194, 143, 28, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  min-height: 620px;
  padding-top: 72px;
  padding-bottom: 72px;
  gap: 56px;
}
.hero-left { flex: 1 1 55%; }
.hero-right { flex: 1 1 45%; position: relative; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.08);
  border: 1px solid rgba(15, 118, 110, 0.15);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
}

.hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--color-text);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero h1 .hl {
  color: var(--color-accent);
  font-weight: 700;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.9;
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  transition: all .3s ease;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.35); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: #fff;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn-outline:hover {
  background: rgba(15, 118, 110, 0.06);
  color: var(--color-primary-dark);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--color-muted);
}
.hero-trust .item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.hero-trust .item svg { width: 16px; height: 16px; color: var(--color-primary); flex-shrink: 0; }

.hero-img-wrap {
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.hero-img-wrap img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.hero-img-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 43, 43, 0.18) 0%, transparent 50%);
  pointer-events: none;
}

.hero-scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--color-muted);
  animation: float 2.5s ease-in-out infinite;
  opacity: 0.6;
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== Trust Bar ===== */
.trust-bar {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: #fff;
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 24px 20px;
  justify-content: center;
}
.trust-item + .trust-item { border-left: 1px solid var(--color-border); }
.trust-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 118, 110, 0.08);
  color: var(--color-primary);
  flex-shrink: 0;
}
.trust-icon svg { width: 20px; height: 20px; }
.trust-text .t-title { font-size: 15px; font-weight: 600; color: var(--color-text); line-height: 1.4; }
.trust-text .t-desc { font-size: 13px; color: var(--color-muted); }

/* ===== Category Intro Cards ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.cat-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  overflow: hidden;
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}
.cat-card:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 118, 110, 0.35);
  box-shadow: var(--shadow-lg);
}
.cat-card-img {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.cat-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.cat-card:hover .cat-card-img img { transform: scale(1.04); }
.cat-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 43, 43, 0.25) 0%, transparent 55%);
}
.cat-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.cat-card-body .cat-badge {
  display: inline-flex;
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.08);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 12px;
}
.cat-card-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}
.cat-card-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-muted);
  flex: 1;
}
.cat-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 16px;
  transition: all .25s ease;
}
.cat-card-link:hover { color: var(--color-accent); gap: 10px; }
.cat-card-link .arrow { transition: transform .25s ease; }
.cat-card-link:hover .arrow { transform: translateX(4px); }

/* ===== Tier Pricing ===== */
.tier-section { background: var(--color-bg-alt); }
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
  margin-top: 40px;
}
.tier-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all .3s ease;
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(15, 118, 110, 0.25);
}
.tier-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: scale(1.02);
}
.tier-card.featured:hover { transform: scale(1.02) translateY(-4px); }

.tier-step {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  margin-bottom: 20px;
  height: 36px;
}
.tier-step .step-bar {
  width: 30px;
  border-radius: 4px 4px 0 0;
  background: rgba(15, 118, 110, 0.18);
}
.tier-card.featured .step-bar { background: var(--color-primary); }
.tier-card.featured .step-bar:nth-child(1) { height: 14px; }
.tier-card.featured .step-bar:nth-child(2) { height: 22px; }
.tier-card.featured .step-bar:nth-child(3) { height: 30px; }
.tier-card .step-bar:nth-child(1) { height: 10px; }
.tier-card .step-bar:nth-child(2) { height: 16px; }
.tier-card .step-bar:nth-child(3) { height: 22px; }

.tier-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-muted);
  margin-bottom: 6px;
}
.tier-card.featured .tier-label { color: var(--color-primary); }
.tier-name {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.tier-price {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}
.tier-price .unit { font-size: 14px; font-weight: 400; color: var(--color-muted); }
.tier-card.featured .tier-price { color: var(--color-accent); }
.tier-desc {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 20px;
  line-height: 1.7;
}
.tier-features {
  list-style: none;
  margin-bottom: 24px;
  flex: 1;
}
.tier-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-body);
  padding: 5px 0;
  line-height: 1.6;
}
.tier-features li svg {
  width: 16px;
  height: 16px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 4px;
}
.tier-features li.dim { color: var(--color-faint); }
.tier-card .btn { width: 100%; }

.tier-note {
  text-align: center;
  font-size: 13px;
  color: var(--color-faint);
  margin-top: 28px;
}

/* ===== Comparison Table ===== */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 40px;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #fff;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.compare-table thead th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
  padding-top: 20px;
  padding-bottom: 20px;
}
.compare-table thead th.recommend-col {
  background: rgba(15, 118, 110, 0.06);
  border-left: 2px solid var(--color-primary);
  border-right: 2px solid var(--color-primary);
  color: var(--color-primary);
}
.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
}
.compare-table tbody tr:hover td { background: rgba(15, 118, 110, 0.02); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table .check { color: var(--color-success); font-weight: 700; }
.compare-table .cross { color: var(--color-faint); }
.compare-table .recommend-col {
  background: rgba(15, 118, 110, 0.04);
  border-left: 2px solid var(--color-primary);
  border-right: 2px solid var(--color-primary);
  font-weight: 500;
}
.compare-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

/* ===== News List ===== */
.news-section { background: var(--color-bg-alt); }
.news-list { margin-top: 40px; }
.news-card {
  display: flex;
  align-items: stretch;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 20px 24px;
  margin-bottom: 16px;
  transition: all .3s ease;
  border-left: 4px solid transparent;
  gap: 20px;
}
.news-card:hover {
  background: #EDF5F3;
  border-left-color: var(--color-primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.news-date {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  border-right: 1px solid var(--color-border);
  padding-right: 20px;
  margin-right: 4px;
}
.news-date .day {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-faint);
  line-height: 1.1;
}
.news-date .month {
  font-size: 12px;
  color: var(--color-faint);
  text-transform: uppercase;
}
.news-content { flex: 1; min-width: 0; }
.news-cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.08);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 8px;
}
.news-title {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: 6px;
  transition: color .2s ease;
}
a.news-title:hover { color: var(--color-primary); }
.news-excerpt {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--color-faint);
  margin-top: 10px;
}
.news-meta .mlink { flex: 1; }
.news-meta .more-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 600;
  color: var(--color-primary);
  font-size: 13px;
  transition: all .2s ease;
}
.news-meta .more-link:hover { color: var(--color-accent); }
.news-meta .arrow { transition: transform .2s ease; }
.news-meta .more-link:hover .arrow { transform: translateX(4px); }
.empty-state {
  background: #fff;
  border: 1px dashed var(--color-border);
  border-radius: 14px;
  padding: 48px 24px;
  text-align: center;
  font-size: 15px;
  color: var(--color-muted);
}

/* ===== CTA ===== */
.cta-section {
  background: var(--color-dark);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  padding-top: 88px;
  padding-bottom: 88px;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(13, 43, 43, 0.94) 0%, rgba(13, 43, 43, 0.82) 60%, rgba(19, 78, 74, 0.72) 100%);
}
.cta-section::after {
  content: '';
  position: absolute;
  top: -100px;
  right: 10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(194, 143, 28, 0.18) 0%, transparent 70%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  background: var(--color-accent);
  color: #fff;
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.cta-title {
  font-size: 28px;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 16px;
}
.cta-title .hl { color: var(--color-accent-hover); }
.cta-desc {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
}
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  padding: 16px 40px;
  border-radius: 12px;
  transition: all .3s ease;
  box-shadow: 0 6px 20px rgba(194, 143, 28, 0.3);
}
.cta-btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(194, 143, 28, 0.35);
}
.cta-btn:active { transform: scale(0.97); }
.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ===== Contact ===== */
.contact-wrap {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  background: var(--color-bg-alt);
  border-radius: 20px;
  padding: 48px;
  margin-top: 40px;
}
.contact-left .ct-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}
.contact-left .ct-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  margin-bottom: 24px;
}
.contact-info-list { list-style: none; }
.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
}
.contact-info-list li svg {
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 4px;
}

.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-label .req { color: var(--color-accent); }
.form-control {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  border: 1px solid #CBD5E1;
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
  font-size: 15px;
  transition: all .25s ease;
  outline: none;
}
.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}
.form-control::placeholder { color: var(--color-faint); }
textarea.form-control {
  height: auto;
  min-height: 110px;
  padding: 12px 16px;
  resize: vertical;
}
.form-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20' stroke='%2364748B' stroke-width='1.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 18px;
  padding-right: 44px;
  cursor: pointer;
}
.form-submit {
  width: 100%;
  height: 48px;
  border-radius: 10px;
  background: var(--color-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all .3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.form-submit:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 14px rgba(194, 143, 28, 0.3);
}
.form-submit:active { transform: scale(0.98); }
.form-submit:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(194, 143, 28, 0.3); }

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  background: rgba(5, 150, 105, 0.08);
  border: 1px solid rgba(5, 150, 105, 0.25);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--color-success);
  font-size: 14px;
  font-weight: 500;
  margin-top: 16px;
}
.form-success.show { display: flex; }
.form-success svg { width: 20px; height: 20px; flex-shrink: 0; }

.form-privacy {
  font-size: 12px;
  color: var(--color-faint);
  margin-top: 12px;
  text-align: center;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 800px;
  margin: 40px auto 0;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #fff;
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid var(--color-border);
  position: relative;
  transition: background .3s ease;
}
.faq-item:last-child { border-bottom: none; }
.faq-item.active { background: #FAFCFB; }
.faq-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  text-align: left;
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: color .25s ease;
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  position: relative;
  transition: transform .3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--color-muted);
  border-radius: 2px;
  transition: background .3s ease;
}
.faq-icon::before {
  width: 16px;
  height: 2px;
  top: 11px;
  left: 4px;
}
.faq-icon::after {
  width: 2px;
  height: 16px;
  top: 4px;
  left: 11px;
  transition: opacity .3s ease;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after { background: var(--color-primary); }
.faq-answer {
  display: none;
  padding: 0 28px 24px 28px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-muted);
}
.faq-item.active .faq-answer { display: block; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: #94A3B8;
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo-text { color: #fff; font-size: 22px; }
.footer-brand .f-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 16px;
  max-width: 320px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color .25s ease;
  line-height: 1.6;
}
.footer-links a:hover { color: #fff; }
.footer-contact { list-style: none; }
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}
.footer-contact li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom .copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}
.footer-bottom .tech-link {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.35);
}
.footer-bottom .tech-link a {
  color: rgba(255, 255, 255, 0.35);
  transition: color .25s ease;
}
.footer-bottom .tech-link a:hover { color: rgba(255, 255, 255, 0.8); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .nav-links { gap: 18px; margin-left: 24px; }
  .hero-inner { gap: 32px; }
  .hero h1 { font-size: 36px; }
  .hero-img-wrap img { height: 360px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(3) { border-left: none; }
  .trust-item:nth-child(n+3) { border-top: 1px solid var(--color-border); }
  .cat-grid { gap: 20px; }
  .tier-grid { gap: 16px; }
  .contact-wrap { grid-template-columns: 1fr; gap: 32px; padding: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .section-pad { padding-top: 60px; padding-bottom: 60px; }
  .section-title { font-size: 26px; }
  .site-header { height: 64px; }
  .nav-links { display: none; }
  .mobile-toggle { display: flex; }
  .hero-inner {
    flex-direction: column;
    padding-top: 48px;
    padding-bottom: 48px;
    min-height: auto;
    gap: 32px;
  }
  .hero-left { flex: 1 1 auto; }
  .hero-right { flex: 1 1 auto; width: 100%; }
  .hero h1 { font-size: 32px; line-height: 1.4; }
  .hero-sub { font-size: 15px; }
  .hero-img-wrap img { height: 240px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item { padding: 16px 10px; }
  .trust-item .trust-text .t-title { font-size: 13px; }
  .trust-item .trust-text .t-desc { font-size: 12px; }
  .cat-grid { grid-template-columns: 1fr; }
  .tier-grid { grid-template-columns: 1fr; }
  .tier-card.featured { transform: none; order: -1; }
  .tier-card.featured:hover { transform: translateY(-4px); }
  .contact-wrap { padding: 24px; }
  .faq-question { font-size: 15px; padding: 18px 20px; }
  .faq-answer { padding: 0 20px 20px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-title { font-size: 22px; }
  .cta-section { padding-top: 64px; padding-bottom: 64px; }
}

@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero h1 { font-size: 28px; }
  .hero-actions .btn { width: 100%; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-item + .trust-item { border-left: none; border-top: 1px solid var(--color-border); }
  .news-card { flex-direction: column; padding: 16px; gap: 12px; }
  .news-date {
    flex-direction: row;
    justify-content: flex-start;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    padding-right: 0;
    padding-bottom: 8px;
    min-width: 0;
    gap: 8px;
  }
  .news-date .day { font-size: 18px; }
  .tier-card.featured { transform: none; }
  .section-title { font-size: 24px; }
  .eyebrow { font-size: 12px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0F766E;
            --color-primary-dark: #115E59;
            --color-primary-light: #EDF5F3;
            --color-accent: #C28F1C;
            --color-accent-hover: #D4A23A;
            --color-bg: #FFFFFF;
            --color-bg-alt: #F8FAF9;
            --color-bg-dark: #0D2B2B;
            --color-text: #1E293B;
            --color-text-body: #334155;
            --color-text-muted: #64748B;
            --color-text-light: #94A3B8;
            --color-border: #E2E8F0;
            --color-success: #059669;
            --radius-card: 12px;
            --radius-btn: 10px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.07);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.09);
            --container-max: 1200px;
            --space-section: 88px;
            --space-section-mobile: 60px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            background-color: var(--color-bg);
            color: var(--color-text-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 20px;
            }
        }

        /* ===== 区块边框注释 ===== */
        .section {
            padding: var(--space-section) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--space-section-mobile) 0;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: 8px;
            transition: color .25s ease, background .25s ease;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 0;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            padding: 8px 12px;
            border-radius: 8px;
            transition: background .25s ease;
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--color-primary-light);
        }
        .nav-cta svg {
            width: 14px;
            height: 14px;
            transition: transform .25s ease;
        }
        .nav-cta:hover svg {
            transform: translateX(3px);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--color-text);
        }
        .nav-toggle:hover {
            background: var(--color-bg-alt);
        }
        .nav-toggle svg {
            width: 22px;
            height: 22px;
        }

        @media (max-width: 900px) {
            .nav-toggle {
                display: inline-flex;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                background: rgba(255, 255, 255, 0.98);
                border-bottom: 1px solid var(--color-border);
                padding: 16px 20px 24px;
                box-shadow: var(--shadow-md);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                font-size: 18px;
                padding: 12px 16px;
                line-height: 1.6;
                border-radius: 10px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--color-primary-light);
            }
            .nav-cta {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: linear-gradient(120deg, #F8FAF9 0%, #EDF5F3 55%, #E0EFEC 100%);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(248, 250, 249, 0.96) 0%, rgba(248, 250, 249, 0.72) 50%, rgba(248, 250, 249, 0.35) 100%);
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            padding: 72px 0 80px;
        }
        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--color-accent);
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid var(--color-border);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 24px;
        }
        .hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }
        .hero h1 .highlight {
            color: var(--color-primary);
            position: relative;
        }
        .hero-sub {
            font-size: 17px;
            color: var(--color-text-muted);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 36px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all .3s ease;
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.25);
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: #fff;
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary-light);
            transform: translateY(-2px);
        }
        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            list-style: none;
        }
        .hero-trust li {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--color-text-muted);
        }
        .hero-trust svg {
            width: 16px;
            height: 16px;
            color: var(--color-primary);
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 32px;
            }
            .hero-sub {
                font-size: 16px;
            }
            .hero-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
            }
            .hero-inner {
                padding: 56px 0 64px;
            }
        }

        /* ===== Anchor Nav ===== */
        .anchor-nav {
            background: #fff;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 72px;
            z-index: 40;
        }
        .anchor-nav-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            padding: 0 24px;
            scrollbar-width: none;
        }
        .anchor-nav-inner::-webkit-scrollbar {
            display: none;
        }
        .anchor-link {
            display: inline-flex;
            align-items: center;
            padding: 14px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-muted);
            border-bottom: 3px solid transparent;
            white-space: nowrap;
            transition: color .25s ease, border-color .25s ease;
        }
        .anchor-link:hover {
            color: var(--color-primary);
        }
        .anchor-link.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-primary);
            font-weight: 600;
        }
        @media (max-width: 640px) {
            .anchor-nav {
                top: 64px;
            }
            .anchor-link {
                padding: 12px 14px;
                font-size: 13px;
            }
        }

        /* ===== Section Heading ===== */
        .section-head {
            margin-bottom: 48px;
        }
        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 10px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.35;
            letter-spacing: 0.3px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 640px;
            margin-top: 10px;
        }
        @media (max-width: 768px) {
            .section-head h2 {
                font-size: 24px;
            }
        }

        /* ===== Channel Cards ===== */
        .channel-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .channel-card {
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            transition: border-color .3s ease, box-shadow .3s ease, transform .3s ease;
            display: flex;
            flex-direction: column;
        }
        .channel-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .channel-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary-light);
            color: var(--color-primary);
            margin-bottom: 20px;
        }
        .channel-card .card-icon svg {
            width: 24px;
            height: 24px;
        }
        .channel-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .channel-card p {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.75;
            flex: 1;
        }
        .channel-card .card-tag {
            display: inline-flex;
            align-items: center;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-primary);
            background: var(--color-primary-light);
            border-radius: 999px;
            padding: 4px 14px;
            margin-top: 20px;
        }
        @media (max-width: 900px) {
            .channel-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .channel-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Flow Steps ===== */
        .flow-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .flow-step {
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            position: relative;
            transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
        }
        .flow-step:hover {
            background: #fff;
            border-color: var(--color-primary);
            box-shadow: var(--shadow-md);
        }
        .flow-step .step-num {
            font-family: "Inter", "Segoe UI", Arial, sans-serif;
            font-size: 42px;
            font-weight: 700;
            color: rgba(15, 118, 110, 0.18);
            line-height: 1;
            margin-bottom: 16px;
        }
        .flow-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        @media (max-width: 900px) {
            .flow-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .flow-wrap {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Service List ===== */
        .service-section {
            background: var(--color-bg-dark);
            position: relative;
            overflow: hidden;
        }
        .service-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(194, 143, 28, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .service-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }
        .service-item {
            display: flex;
            gap: 18px;
            padding: 24px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            transition: background .3s ease, border-color .3s ease;
        }
        .service-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.2);
        }
        .service-item svg {
            width: 32px;
            height: 32px;
            color: var(--color-accent);
            flex-shrink: 0;
        }
        .service-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: #EDF5F3;
            margin-bottom: 6px;
        }
        .service-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
        }
        .service-section .section-head h2 {
            color: #fff;
        }
        .service-section .section-head p {
            color: rgba(255, 255, 255, 0.65);
        }
        @media (max-width: 768px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            background: #fff;
            overflow: hidden;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            background: #fff;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item[open] {
            background: var(--color-bg-alt);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            list-style: none;
            transition: color .25s ease;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--color-primary);
        }
        .faq-item summary .faq-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            position: relative;
            transition: transform .3s ease;
        }
        .faq-item summary .faq-icon::before,
        .faq-item summary .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .faq-item summary .faq-icon::before {
            width: 2px;
            height: 16px;
            left: 9px;
            top: 2px;
        }
        .faq-item summary .faq-icon::after {
            width: 16px;
            height: 2px;
            left: 2px;
            top: 9px;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.85;
        }
        .faq-item .faq-answer p {
            border-left: 3px solid var(--color-primary);
            padding-left: 16px;
        }
        @media (max-width: 640px) {
            .faq-item summary {
                padding: 18px 20px;
                font-size: 16px;
            }
            .faq-item .faq-answer {
                padding: 0 20px 20px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0 80px;
        }
        .cta-box {
            background: linear-gradient(135deg, #F8FAF9 0%, #EDF5F3 100%);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }
        .cta-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 10px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 480px;
        }
        .cta-box .btn-accent {
            background: var(--color-accent);
            color: #fff;
            border: none;
            padding: 0 40px;
            height: 52px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            white-space: nowrap;
            transition: background .3s ease, box-shadow .3s ease, transform .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-box .btn-accent:hover {
            background: var(--color-accent-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .cta-box {
                flex-direction: column;
                padding: 36px 28px;
                text-align: center;
            }
            .cta-box .btn-accent {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: #94A3B8;
            padding: 64px 0 0;
        }
        .site-footer .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 16px;
        }
        .site-footer .logo-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
        }
        .f-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: color .25s ease;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }
        .footer-contact svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            color: var(--color-accent);
            margin-top: 2px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .tech-link {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .tech-link a {
            color: rgba(255, 255, 255, 0.6);
            transition: color .25s ease;
        }
        .tech-link a:hover {
            color: #fff;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr !important;
                gap: 32px !important;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr !important;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 通用工具 ===== */
        .bg-alt {
            background: var(--color-bg-alt);
        }
        .text-muted {
            color: var(--color-text-muted);
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #f1f5f9;
        }
        ::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }

/* roulang page: article */
:root{
  --primary:#0F766E;--primary-hover:#115E59;--primary-light:#EDF5F3;
  --accent:#C28F1C;--accent-hover:#D4A23A;
  --bg-main:#FFFFFF;--bg-soft:#F8FAF9;--bg-dark:#0D2B2B;
  --text-title:#1E293B;--text-body:#334155;--text-muted:#64748B;--text-faint:#94A3B8;
  --border:#E2E8F0;--success:#059669;
  --radius-card:12px;--radius-btn:10px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06);--shadow-md:0 8px 24px rgba(15,118,110,0.10);--shadow-lg:0 16px 32px rgba(15,118,110,0.14);
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,"Segoe UI",sans-serif;
  --font-en:"Inter","Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:16px;line-height:1.8;color:var(--text-body);background:var(--bg-main);-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color .3s ease}
img{max-width:100%;display:block;border:0}
button,input,select,textarea{font-family:inherit;font-size:inherit;line-height:inherit}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo-text{font-size:20px;font-weight:700;color:var(--primary);letter-spacing:-0.02em;display:inline-flex;align-items:center;line-height:1.2}
.logo-dot{width:8px;height:8px;background:var(--accent);border-radius:50%;margin-left:4px;flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{font-size:15px;font-weight:500;color:var(--text-muted);padding:8px 4px;position:relative;transition:color .3s}
.nav-link:hover{color:var(--primary)}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;border-radius:2px;background:var(--primary)}
.nav-cta{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:500;color:var(--primary);padding:10px 20px;border:1px solid var(--primary);border-radius:var(--radius-btn);transition:all .3s;white-space:nowrap}
.nav-cta:hover{background:var(--primary-light);box-shadow:var(--shadow-sm)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;min-width:44px;min-height:44px;align-items:center;justify-content:center}
.nav-toggle span{width:22px;height:2px;background:var(--text-title);border-radius:2px;transition:all .3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ===== Article Banner ===== */
.article-banner{position:relative;min-height:360px;display:flex;align-items:center;padding:64px 0;background:linear-gradient(135deg,rgba(13,43,43,0.94),rgba(15,118,110,0.82)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;color:#fff}
.article-banner .container{width:100%}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:14px;color:rgba(255,255,255,0.75);margin-bottom:20px}
.breadcrumb a{color:rgba(255,255,255,0.85);transition:color .3s}
.breadcrumb a:hover{color:#fff}
.breadcrumb-sep{color:rgba(255,255,255,0.4);font-size:12px}
.breadcrumb-current{color:rgba(255,255,255,0.95);max-width:360px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge-category{display:inline-block;background:var(--accent);color:#fff;font-size:13px;font-weight:500;padding:6px 16px;border-radius:999px;margin-bottom:16px;letter-spacing:0.02em}
.article-title{font-size:40px;line-height:1.3;font-weight:700;color:#fff;max-width:880px;margin-bottom:16px;letter-spacing:-0.01em}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:16px;font-size:14px;color:rgba(255,255,255,0.8)}
.article-meta .divider{color:rgba(255,255,255,0.3)}
/* ===== Article Body ===== */
.article-body{padding:56px 0 32px}
.article-content{max-width:860px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--text-body)}
.article-content p{margin-bottom:1.5em}
.article-content h2{font-size:26px;font-weight:600;color:var(--text-title);margin:2em 0 0.8em;line-height:1.4}
.article-content h3{font-size:20px;font-weight:600;color:var(--text-title);margin:1.8em 0 0.6em;line-height:1.4}
.article-content img{border-radius:var(--radius-card);border:1px solid var(--border);max-width:100%;height:auto;margin:1.5em 0}
.article-content blockquote{border-left:4px solid var(--primary);background:var(--bg-soft);padding:16px 20px;font-style:italic;color:var(--text-muted);border-radius:0 8px 8px 0;margin:1.5em 0}
.article-content ul,.article-content ol{margin:1.2em 0;padding-left:1.5em;display:grid;gap:8px}
.article-content li::marker{color:var(--primary)}
.article-content table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:15px;border-radius:8px;overflow:hidden}
.article-content th{background:var(--bg-soft);font-weight:600;color:var(--text-title);padding:12px 16px;border-bottom:2px solid var(--border);text-align:left}
.article-content td{padding:12px 16px;border-bottom:1px solid var(--border)}
.article-content code{background:var(--bg-soft);padding:2px 8px;border-radius:4px;font-size:14px;color:var(--primary)}
.article-content pre{background:#0F172A;color:#E2E8F0;padding:20px;border-radius:10px;overflow-x:auto;margin:1.5em 0;font-size:14px;line-height:1.7}
.article-content pre code{background:none;color:inherit;padding:0}
.article-content a{color:var(--primary);border-bottom:1px solid rgba(15,118,110,0.3)}
.article-content a:hover{color:var(--primary-hover);border-color:var(--primary)}
.article-not-found{text-align:center;padding:80px 20px}
.article-not-found p{font-size:18px;color:var(--text-muted);margin-bottom:16px}
.article-not-found a{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;padding:14px 36px;border-radius:var(--radius-btn);font-weight:500;transition:all .3s}
.article-not-found a:hover{background:var(--primary-hover);box-shadow:var(--shadow-md)}
/* ===== Tags ===== */
.article-tags{max-width:860px;margin:32px auto 0;display:flex;flex-wrap:wrap;gap:10px;padding-bottom:48px;border-bottom:1px solid var(--border)}
.tag{display:inline-flex;align-items:center;background:var(--bg-soft);border:1px solid var(--border);color:var(--text-muted);font-size:13px;font-weight:500;padding:8px 16px;border-radius:999px;transition:all .3s}
.tag:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
/* ===== Related ===== */
.related-section{padding:64px 0 72px;background:var(--bg-soft)}
.section-head{margin-bottom:40px}
.section-eyebrow{display:block;font-family:var(--font-en);font-size:13px;font-weight:600;letter-spacing:0.12em;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.section-title{font-size:32px;font-weight:600;color:var(--text-title);line-height:1.3}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-card);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.rel-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.rel-cover{height:140px;overflow:hidden;background:var(--bg-soft)}
.rel-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.rel-card:hover .rel-cover img{transform:scale(1.04)}
.rel-body{padding:20px 20px 16px;display:flex;flex-direction:column;flex:1;gap:8px}
.rel-body h3{font-size:17px;font-weight:600;color:var(--text-title);line-height:1.4}
.rel-body p{font-size:14px;line-height:1.7;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rel-time{font-size:13px;color:var(--text-faint);margin-top:auto;padding-top:8px}
/* ===== Article Nav ===== */
.article-nav{padding:40px 0 64px}
.article-nav .article-nav-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:860px;margin:0 auto}
.back-link,.next-link{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:500;color:var(--text-body);padding:10px 0;transition:all .3s}
.back-link svg,.next-link svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;transition:transform .3s}
.back-link:hover{color:var(--primary)}
.back-link:hover svg{transform:translateX(-4px)}
.next-link:hover{color:var(--primary)}
.next-link:hover svg{transform:translateX(4px)}
/* ===== Footer ===== */
.site-footer{background:var(--bg-dark);color:rgba(255,255,255,0.75);padding:64px 0 0}
.footer-brand .logo-text{color:#fff;font-size:22px}
.footer-brand .logo-dot{background:var(--accent)}
.f-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,0.6);margin-top:16px;max-width:320px}
.footer-title{font-size:16px;font-weight:600;color:#fff;margin-bottom:20px}
.footer-links{list-style:none;display:grid;gap:12px}
.footer-links a,.footer-contact li{font-size:14px;color:rgba(255,255,255,0.6);transition:color .3s;display:flex;align-items:center;gap:10px;line-height:1.6}
.footer-links a:hover{color:#fff}
.footer-contact{list-style:none;display:grid;gap:16px}
.footer-contact svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.5;flex-shrink:0;color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.copyright{font-size:13px;color:rgba(255,255,255,0.5)}
.tech-link{font-size:13px;color:rgba(255,255,255,0.5)}
.tech-link a{color:rgba(255,255,255,0.6);transition:color .3s}
.tech-link a:hover{color:#fff}
/* ===== Responsive ===== */
@media(max-width:1024px){
  .nav-links{gap:20px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .header-inner{height:64px}
  .nav-links{position:fixed;top:64px;left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);flex-direction:column;align-items:flex-start;padding:24px 24px 32px;gap:4px;box-shadow:0 12px 32px rgba(0,0,0,0.08);transform:translateY(-120%);transition:transform .35s ease;visibility:hidden;opacity:0;z-index:40;border-bottom:1px solid var(--border)}
  .nav-links.open{transform:translateY(0);visibility:visible;opacity:1}
  .nav-link{display:block;width:100%;padding:14px 0;font-size:18px;line-height:2.2}
  .nav-link.active::after{display:none}
  .nav-link.active{color:var(--primary);background:var(--primary-light);padding-left:12px;border-radius:8px;width:100%}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .article-banner{min-height:300px;padding:48px 0}
  .article-title{font-size:30px}
  .related-grid{grid-template-columns:1fr;gap:16px}
  .rel-cover{height:180px}
  .section-title{font-size:26px}
  .article-content{font-size:16px;line-height:1.85}
  .article-content h2{font-size:23px}
  .article-content h3{font-size:19px}
  .article-meta{gap:10px;font-size:13px}
  .article-nav .article-nav-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr !important;gap:32px !important;padding-bottom:32px !important}
  .footer-brand{grid-column:span 2}
}
@media(max-width:520px){
  .container{padding-left:16px;padding-right:16px}
  .article-banner{min-height:260px;padding:40px 0}
  .article-title{font-size:26px;line-height:1.35}
  .breadcrumb{font-size:13px}
  .footer-grid{grid-template-columns:1fr !important;gap:24px !important}
  .footer-brand{grid-column:auto}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: category2 */
:root {
      --color-primary: #0F766E;
      --color-primary-dark: #115E59;
      --color-accent: #C28F1C;
      --color-accent-hover: #D4A23A;
      --color-bg: #FFFFFF;
      --color-bg-alt: #F8FAF9;
      --color-dark: #0D2B2B;
      --color-text: #1E293B;
      --color-body: #334155;
      --color-muted: #64748B;
      --color-border: #E2E8F0;
      --color-success: #059669;
      --radius: 12px;
      --radius-lg: 16px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 14px rgba(15, 118, 110, 0.08);
      --shadow-lg: 0 14px 36px rgba(15, 118, 110, 0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, sans-serif;
      --font-en: "Inter", "Segoe UI", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
    }

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

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
    }

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

    /* ===================== Header / Nav ===================== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--color-primary-dark);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .logo-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--color-accent);
      display: inline-block;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: #475569;
      padding: 8px 16px;
      border-radius: 8px;
      position: relative;
      transition: color 0.25s, background 0.25s;
    }

    .nav-link:hover {
      color: var(--color-primary);
      background: #F0FDFA;
    }

    .nav-link.active {
      color: var(--color-primary);
      font-weight: 600;
      background: #F0FDFA;
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 16px;
      right: 16px;
      height: 3px;
      border-radius: 3px 3px 0 0;
      background: var(--color-primary);
    }

    .nav-cta {
      font-size: 14px;
      font-weight: 600;
      color: var(--color-primary);
      padding: 8px 16px;
      border: 1px solid rgba(15, 118, 110, 0.35);
      border-radius: 10px;
      white-space: nowrap;
      transition: all 0.25s;
    }

    .nav-cta:hover {
      background: var(--color-primary);
      color: #fff;
      border-color: var(--color-primary);
      box-shadow: 0 4px 14px rgba(15, 118, 110, 0.2);
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--color-border);
      border-radius: 10px;
      background: #fff;
      cursor: pointer;
      color: var(--color-text);
    }

    /* 移动端导航 */
    @media (max-width: 991px) {
      .nav-toggle {
        display: flex;
      }

      .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(16px);
        padding: 20px 24px 28px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.4s ease, opacity 0.3s ease;
        box-shadow: 0 20px 40px rgba(15, 23, 42, 0.06);
      }

      .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }

      .nav-link {
        font-size: 18px;
        padding: 14px 16px;
        border-radius: 10px;
      }

      .nav-link.active::after {
        display: none;
      }

      .nav-link.active {
        background: #F0FDFA;
      }

      .nav-cta {
        display: none;
      }
    }

    @media (max-width: 640px) {
      .nav-container {
        height: 64px;
      }

      .logo-text {
        font-size: 18px;
      }
    }

    /* ===================== Page Hero ===================== */
    .page-hero {
      position: relative;
      min-height: 300px;
      display: flex;
      align-items: center;
      padding: 64px 0;
      background: linear-gradient(135deg, rgba(13, 43, 43, 0.86) 0%, rgba(15, 118, 110, 0.72) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: #fff;
      overflow: hidden;
    }

    .page-hero::after {
      content: '';
      position: absolute;
      top: -60px;
      right: -60px;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(194, 143, 28, 0.28) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 255, 255, 0.14);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: #E6F7F5;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 500;
      letter-spacing: 0.04em;
      margin-bottom: 18px;
    }

    .page-hero h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      color: #fff;
      letter-spacing: 0.01em;
      margin-bottom: 16px;
      max-width: 720px;
    }

    .page-hero h1 .highlight {
      color: #F0C978;
      font-weight: 700;
    }

    .page-hero p {
      font-size: 17px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.88);
      max-width: 660px;
      margin-bottom: 0;
    }

    @media (max-width: 768px) {
      .page-hero {
        min-height: auto;
        padding: 52px 0;
      }

      .page-hero h1 {
        font-size: 30px;
      }

      .page-hero p {
        font-size: 15px;
      }
    }

    /* ===================== Anchor Nav ===================== */
    .anchor-nav-wrap {
      background: #fff;
      border-bottom: 1px solid var(--color-border);
      position: sticky;
      top: 72px;
      z-index: 40;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    .anchor-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      padding: 12px 24px;
      min-width: max-content;
    }

    .anchor-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--color-muted);
      padding: 8px 18px;
      border-radius: 999px;
      white-space: nowrap;
      transition: all 0.25s;
    }

    .anchor-link:hover {
      color: var(--color-primary);
      background: #F0FDFA;
    }

    @media (max-width: 768px) {
      .anchor-nav-wrap {
        top: 64px;
      }

      .anchor-link {
        font-size: 13px;
        padding: 7px 14px;
      }
    }

    /* ===================== Sections ===================== */
    .section {
      padding: 88px 0;
    }

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

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-en);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: var(--color-accent);
      margin-bottom: 12px;
    }

    .section-kicker::before {
      content: '';
      width: 28px;
      height: 2px;
      background: var(--color-accent);
      border-radius: 2px;
      display: inline-block;
    }

    .section-title {
      font-size: 30px;
      font-weight: 600;
      color: var(--color-text);
      line-height: 1.4;
      margin-bottom: 20px;
      letter-spacing: -0.01em;
    }

    .section-desc {
      font-size: 16px;
      line-height: 1.8;
      color: var(--color-muted);
      max-width: 640px;
    }

    @media (max-width: 768px) {
      .section {
        padding: 56px 0;
      }

      .section-title {
        font-size: 24px;
      }
    }

    /* ===================== Intro Block ===================== */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: center;
    }

    .intro-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }

    .intro-media img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }

    .intro-media::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 40%;
      background: linear-gradient(to top, rgba(13, 43, 43, 0.35), transparent);
      pointer-events: none;
    }

    .intro-content .list-check {
      margin-top: 8px;
      display: grid;
      gap: 14px;
    }

    .list-check li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 16px;
      line-height: 1.7;
      color: var(--color-body);
    }

    .list-check li .icon-wrap {
      width: 24px;
      height: 24px;
      flex-shrink: 0;
      border-radius: 50%;
      background: #F0FDFA;
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }

    @media (max-width: 900px) {
      .intro-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .intro-media img {
        height: 260px;
      }
    }

    /* ===================== Steps ===================== */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

    .step-card {
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius);
      padding: 28px 22px;
      position: relative;
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    }

    .step-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(15, 118, 110, 0.35);
    }

    .step-num {
      font-family: var(--font-en);
      font-size: 32px;
      font-weight: 700;
      color: rgba(15, 118, 110, 0.18);
      line-height: 1;
      display: block;
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 14px;
      line-height: 1.7;
      color: var(--color-muted);
    }

    .step-arrow {
      position: absolute;
      top: 50%;
      right: -20px;
      transform: translateY(-50%);
      color: var(--color-accent);
      font-size: 20px;
      z-index: 2;
      display: flex;
    }

    @media (max-width: 1024px) {
      .steps-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
      }

      .step-arrow {
        display: none;
      }
    }

    @media (max-width: 640px) {
      .steps-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===================== Materials ===================== */
    .materials-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 40px;
    }

    .materials-list {
      display: grid;
      gap: 16px;
    }

    .material-item {
      background: #fff;
      border: 1px solid var(--color-border);
      border-left: 3px solid var(--color-primary);
      border-radius: var(--radius);
      padding: 22px 24px;
      display: flex;
      gap: 16px;
      transition: box-shadow 0.3s, transform 0.3s;
    }

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

    .material-icon {
      width: 42px;
      height: 42px;
      flex-shrink: 0;
      border-radius: 10px;
      background: #F0FDFA;
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .material-item h3 {
      font-size: 16px;
      font-weight: 600;
      color: var(--color-text);
      margin-bottom: 4px;
    }

    .material-item p {
      font-size: 14px;
      color: var(--color-muted);
      line-height: 1.7;
    }

    .materials-note {
      background: #FFFDF5;
      border: 1px solid rgba(194, 143, 28, 0.3);
      border-radius: var(--radius);
      padding: 32px;
    }

    .materials-note h3 {
      font-size: 18px;
      font-weight: 600;
      color: #7A5C10;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .materials-note ul {
      display: grid;
      gap: 12px;
    }

    .materials-note li {
      display: flex;
      gap: 10px;
      font-size: 15px;
      line-height: 1.7;
      color: #6B5B2E;
    }

    .materials-note li::before {
      content: '✓';
      color: #B8860B;
      font-weight: 700;
      flex-shrink: 0;
    }

    @media (max-width: 900px) {
      .materials-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===================== Security ===================== */
    .security-band {
      background: var(--color-dark);
      border-radius: 20px;
      padding: 52px 48px;
      color: #fff;
      margin-top: 40px;
      position: relative;
      overflow: hidden;
    }

    .security-band::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(194, 143, 28, 0.22) 0%, transparent 70%);
    }

    .security-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
      z-index: 2;
    }

    .security-item {
      text-align: left;
      padding: 8px 0;
    }

    .security-item .num {
      font-family: var(--font-en);
      font-size: 36px;
      font-weight: 700;
      color: #F0C978;
      line-height: 1.3;
      display: block;
      margin-bottom: 6px;
    }

    .security-item h3 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 6px;
    }

    .security-item p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      line-height: 1.7;
    }

    @media (max-width: 900px) {
      .security-band {
        padding: 40px 28px;
      }

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

    @media (max-width: 480px) {
      .security-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===================== FAQ ===================== */
    .faq-wrap {
      max-width: 860px;
      margin: 40px auto 0;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: #fff;
    }

    .faq-item {
      border-bottom: 1px solid var(--color-border);
      transition: background 0.3s;
    }

    .faq-item:last-child {
      border-bottom: none;
    }

    .faq-item.active {
      background: #FDFDFB;
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 28px;
      background: none;
      border: none;
      cursor: pointer;
      text-align: left;
      font-size: 17px;
      font-weight: 500;
      color: var(--color-text);
      transition: color 0.25s;
      min-height: 56px;
    }

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

    .faq-icon {
      width: 22px;
      height: 22px;
      flex-shrink: 0;
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--color-primary);
      transition: transform 0.3s;
    }

    .faq-icon::before,
    .faq-icon::after {
      content: '';
      position: absolute;
      background: currentColor;
      border-radius: 2px;
    }

    .faq-icon::before {
      width: 14px;
      height: 2px;
    }

    .faq-icon::after {
      width: 2px;
      height: 14px;
      transition: transform 0.3s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
    }

    .faq-answer-inner {
      padding: 0 28px 22px;
      font-size: 15px;
      line-height: 1.8;
      color: var(--color-muted);
      border-left: 2px solid var(--color-primary);
      margin-left: 28px;
      padding-left: 20px;
    }

    @media (max-width: 640px) {
      .faq-question {
        font-size: 15px;
        padding: 18px 20px;
      }

      .faq-answer-inner {
        margin-left: 20px;
        padding-left: 16px;
      }
    }

    /* ===================== CTA ===================== */
    .cta-section {
      background: linear-gradient(135deg, #0D2B2B 0%, #134E4A 100%);
      border-radius: 20px;
      padding: 52px 56px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      color: #fff;
      position: relative;
      overflow: hidden;
      margin-bottom: 88px;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -40px;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(194, 143, 28, 0.18) 0%, transparent 70%);
    }

    .cta-content {
      position: relative;
      z-index: 2;
      flex: 1;
    }

    .cta-content h2 {
      font-size: 26px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .cta-content h2 .highlight {
      color: #F0C978;
    }

    .cta-content p {
      font-size: 15px;
      color: rgba(255, 255, 255, 0.78);
      line-height: 1.7;
      max-width: 520px;
    }

    .cta-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(194, 143, 28, 0.2);
      border: 1px solid rgba(194, 143, 28, 0.4);
      color: #F0C978;
      padding: 5px 14px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.05em;
    }

    .btn-accent {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--color-accent);
      color: #fff;
      font-size: 16px;
      font-weight: 600;
      padding: 14px 34px;
      border-radius: 10px;
      border: none;
      cursor: pointer;
      transition: all 0.3s;
      white-space: nowrap;
      position: relative;
      z-index: 2;
    }

    .btn-accent:hover {
      background: var(--color-accent-hover);
      box-shadow: 0 8px 24px rgba(194, 143, 28, 0.3);
      transform: translateY(-2px);
    }

    .btn-accent:active {
      transform: scale(0.97);
    }

    @media (max-width: 768px) {
      .cta-section {
        flex-direction: column;
        align-items: flex-start;
        padding: 36px 28px;
        margin-bottom: 56px;
      }

      .btn-accent {
        width: 100%;
        justify-content: center;
      }
    }

    /* ===================== Footer ===================== */
    .site-footer {
      background: var(--color-dark);
      color: rgba(255, 255, 255, 0.72);
      padding: 64px 0 0;
    }

    .site-footer .logo-text {
      color: #fff;
      font-size: 20px;
      margin-bottom: 16px;
      display: inline-flex;
    }

    .site-footer .logo-dot {
      background: #F0C978;
    }

    .f-desc {
      font-size: 14px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.6);
      margin-top: 12px;
      max-width: 320px;
    }

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

    .footer-links {
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      transition: color 0.25s;
    }

    .footer-links a:hover {
      color: #fff;
    }

    .footer-contact {
      list-style: none;
      display: grid;
      gap: 12px;
    }

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      line-height: 1.6;
    }

    .footer-contact svg {
      width: 18px;
      height: 18px;
      flex-shrink: 0;
      margin-top: 2px;
      color: #F0C978;
    }

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

    .footer-bottom .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
    }

    .copyright {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
    }

    .tech-link {
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
    }

    .tech-link a {
      color: rgba(255, 255, 255, 0.65);
    }

    .tech-link a:hover {
      color: #fff;
      text-decoration: underline;
    }

    @media (max-width: 768px) {
      .footer-bottom .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
      }

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

    /* ===== Focus 可访问性 ===== */
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--color-primary);
      outline-offset: 2px;
      border-radius: 4px;
    }

    /* ===== scroll-margin for anchor ===== */
    .scroll-anchor {
      scroll-margin-top: 120px;
    }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0F766E;
            --color-primary-dark: #115E59;
            --color-primary-light: #EDF5F3;
            --color-accent: #C28F1C;
            --color-accent-hover: #D4A23A;
            --color-bg: #FFFFFF;
            --color-bg-soft: #F8FAF9;
            --color-dark: #0D2B2B;
            --color-text: #1E293B;
            --color-text-body: #334155;
            --color-text-muted: #64748B;
            --color-text-weak: #94A3B8;
            --color-border: #E2E8F0;
            --color-success: #059669;
            --radius: 12px;
            --radius-sm: 10px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 4px 16px rgba(15, 118, 110, 0.10);
            --shadow-lg: 0 16px 40px rgba(15, 118, 110, 0.16);
            --font-screen: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, sans-serif;
            --font-en: "Inter", "Segoe UI", Arial, sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-screen);
            background: var(--color-bg);
            color: var(--color-text-body);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        select,
        textarea {
            font-family: inherit;
        }

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

        /* ===== 通用圆角 ===== */
        .radius-card {
            border-radius: var(--radius);
        }
        .radius-sm {
            border-radius: var(--radius-sm);
        }

        /* ===== Header 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .logo-dot {
            width: 8px;
            height: 8px;
            background: var(--color-accent);
            border-radius: 50%;
            margin-left: 4px;
            display: inline-block;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            padding: 8px 2px;
            position: relative;
            transition: color 0.25s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--color-primary);
        }
        .nav-link.active {
            color: var(--color-primary);
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-primary);
        }
        .header-cta {
            margin-left: auto;
        }
        .cta-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border: 1px solid var(--color-primary);
            border-radius: 999px;
            transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
        }
        .cta-link:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .cta-link span {
            transition: transform 0.25s;
        }
        .cta-link:hover span {
            transform: translateX(3px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: var(--color-bg-soft);
            border-radius: 10px;
            padding: 10px;
            align-items: center;
            border: 1px solid var(--color-border);
            transition: background 0.25s;
        }
        .nav-toggle:hover {
            background: var(--color-primary-light);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 16px;
            font-weight: 600;
            height: 48px;
            padding: 0 30px;
            border-radius: var(--radius-sm);
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-outline {
            background: #fff;
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary-dark);
        }
        .btn-gold {
            background: var(--color-accent);
            color: #fff;
        }
        .btn-gold:hover {
            background: var(--color-accent-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn-gold:active {
            transform: scale(0.97);
        }
        .btn:focus-visible,
        .nav-link:focus-visible,
        .cta-link:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 3px;
        }

        /* ===== 区块间距 ===== */
        .section {
            padding: 88px 0;
        }
        .section-alt {
            background: var(--color-bg-soft);
        }

        /* ===== 页头 ===== */
        .page-hero {
            position: relative;
            padding: 72px 0 68px;
            background:
                linear-gradient(115deg, rgba(13, 43, 43, 0.94) 0%, rgba(15, 118, 110, 0.82) 55%, rgba(13, 43, 43, 0.62) 100%),
                url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
            color: #fff;
            border-bottom: 4px solid var(--color-accent);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.12em;
            color: #F0FDFA;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 6px 16px;
            border-radius: 30px;
            font-family: var(--font-en);
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.3;
            margin: 20px 0 16px;
            color: #fff;
            letter-spacing: 0.01em;
        }
        .page-hero h1 .hero-accent {
            color: #E5B94A;
        }
        .page-hero .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            max-width: 580px;
            color: rgba(255, 255, 255, 0.92);
        }
        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 28px;
        }
        .hero-meta .pills {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.16);
            padding: 6px 14px;
            border-radius: 30px;
            color: #e2f3f1;
        }
        .hero-meta .pills svg {
            width: 14px;
            height: 14px;
            stroke: #5EEAD4;
        }

        /* ===== 锚点导航条 ===== */
        .anchor-nav {
            position: sticky;
            top: 72px;
            z-index: 40;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: 0 1px 4px rgba(15, 23, 42, 0.03);
        }
        .anchor-inner {
            display: flex;
            gap: 36px;
            align-items: center;
            overflow-x: auto;
            padding: 14px 0;
            scrollbar-width: none;
        }
        .anchor-inner::-webkit-scrollbar {
            display: none;
        }
        .anchor-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            white-space: nowrap;
            padding: 4px 2px;
            border-bottom: 2px solid transparent;
            transition: color 0.25s, border-color 0.25s;
        }
        .anchor-nav a:hover {
            color: var(--color-primary);
        }
        .anchor-nav a.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-primary);
        }

        /* ===== 板块标题 ===== */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }
        .section-eyebrow {
            font-family: var(--font-en);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.14em;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 10px;
            display: block;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.35;
            letter-spacing: 0.01em;
        }
        .section-head p {
            margin-top: 14px;
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
        }

        /* ===== 等级卡片 ===== */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: stretch;
        }
        .tier-card {
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            padding: 36px 28px 32px;
            position: relative;
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
            display: flex;
            flex-direction: column;
        }
        .tier-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.35);
        }
        .tier-card.featured {
            border-color: var(--color-primary);
            background: linear-gradient(180deg, #F0FAF8 0%, #fff 45%);
            box-shadow: var(--shadow-lg);
        }
        .tier-badge {
            position: absolute;
            top: -13px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--color-accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            white-space: nowrap;
            box-shadow: 0 4px 10px rgba(194, 143, 28, 0.3);
        }
        .tier-name {
            font-size: 22px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            text-align: center;
        }
        .tier-sub {
            font-size: 13px;
            color: var(--color-text-muted);
            text-align: center;
            margin-bottom: 20px;
        }
        .tier-feats {
            margin-top: 8px;
            flex: 1;
        }
        .tier-feats li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-body);
            padding: 8px 0;
            border-bottom: 1px dashed var(--color-border);
        }
        .tier-feats li:last-child {
            border-bottom: none;
        }
        .tier-feats svg {
            flex: none;
            width: 18px;
            height: 18px;
            margin-top: 4px;
            stroke: var(--color-primary);
        }
        .tier-note {
            margin-top: 16px;
            font-size: 13px;
            color: var(--color-text-weak);
            text-align: center;
            background: var(--color-bg-soft);
            border-radius: 10px;
            padding: 10px;
        }

        /* ===== 双栏内容 ===== */
        .split-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .split-img {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--color-border);
            position: relative;
        }
        .split-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3.4;
        }
        .split-img::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: 16px;
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
        }
        .benefit-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px dashed var(--color-border);
        }
        .benefit-list li:last-child {
            border-bottom: none;
        }
        .benefit-icon {
            flex: none;
            width: 42px;
            height: 42px;
            background: var(--color-primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            transition: background 0.25s, transform 0.25s;
        }
        .benefit-icon svg {
            width: 20px;
            height: 20px;
        }
        .benefit-list li:hover .benefit-icon {
            background: var(--color-primary);
            color: #fff;
            transform: scale(1.05);
        }
        .benefit-txt strong {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 2px;
        }
        .benefit-txt span {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        /* ===== 流程步骤 ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 16px;
        }
        .process-step {
            position: relative;
            text-align: center;
            padding: 32px 18px 28px;
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.3);
        }
        .process-num {
            width: 58px;
            height: 58px;
            margin: 0 auto 18px;
            background: var(--color-primary);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-en);
            position: relative;
            box-shadow: 0 8px 18px rgba(15, 118, 110, 0.25);
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
        }
        .process-line {
            position: absolute;
            top: 57px;
            left: calc(50% + 32px);
            width: calc(100% - 64px);
            height: 2px;
            background: repeating-linear-gradient(90deg, var(--color-border) 0 6px, transparent 6px 12px);
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border);
            position: relative;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item.open {
            background: var(--color-bg-soft);
        }
        .faq-item.open::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-primary);
        }
        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            text-align: left;
            font-size: 17px;
            font-weight: 500;
            color: var(--color-text);
            padding: 22px 28px;
            background: none;
            border: none;
            cursor: pointer;
            gap: 16px;
            transition: color 0.25s;
        }
        .faq-q:hover {
            color: var(--color-primary);
        }
        .faq-icon {
            flex: none;
            width: 22px;
            height: 22px;
            position: relative;
            transition: transform 0.3s;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--color-primary);
            border-radius: 2px;
            transition: all 0.3s;
        }
        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 10px;
            left: 4px;
        }
        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 4px;
            left: 10px;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-a-inner {
            padding: 0 28px 22px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-text-muted);
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            padding-top: 0;
            padding-bottom: 100px;
        }
        .cta-panel {
            background: linear-gradient(135deg, #F8FAF9 0%, #EDF5F3 100%);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 52px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(15, 118, 110, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-text h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--color-text);
            line-height: 1.4;
        }
        .cta-text p {
            font-size: 15px;
            color: var(--color-text-muted);
            margin-top: 8px;
            max-width: 560px;
            line-height: 1.8;
        }
        .cta-panel .btn-gold {
            flex: none;
            padding: 0 36px;
            height: 52px;
            font-size: 16px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-dark);
            color: #CBD5E1;
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 20px;
        }
        .footer-brand .logo-dot {
            background: var(--color-accent);
        }
        .f-desc {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            margin-top: 16px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.25s;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 14px;
            color: #94A3B8;
            margin-bottom: 14px;
            line-height: 1.7;
        }
        .footer-contact svg {
            flex: none;
            width: 20px;
            height: 20px;
            margin-top: 3px;
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .copyright {
            font-size: 13px;
            color: #64748B;
        }
        .tech-link {
            font-size: 13px;
            color: #64748B;
        }
        .tech-link a {
            color: #94A3B8;
            transition: color 0.25s;
        }
        .tech-link a:hover {
            color: #fff;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .tier-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-line {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
        }

        @media (max-width: 900px) {
            .nav-links {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding: 20px 24px 28px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-16px);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
                z-index: -1;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-link {
                font-size: 17px;
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--color-bg-soft);
            }
            .nav-link.active::after {
                bottom: 4px;
                height: 2px;
                width: 36px;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-inner {
                height: 64px;
            }
            .anchor-nav {
                top: 64px;
            }
            .page-hero {
                padding: 56px 0 52px;
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .page-hero .hero-sub {
                font-size: 16px;
            }
            .section {
                padding: 64px 0;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .split-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 700px) {
            .tier-grid {
                grid-template-columns: 1fr;
            }
            .tier-card.featured {
                order: -1;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-panel {
                padding: 36px 28px;
                flex-direction: column;
                text-align: center;
                gap: 24px;
            }
            .cta-text p {
                margin-left: auto;
                margin-right: auto;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .hero-meta {
                gap: 8px;
            }
            .anchor-inner {
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 20px;
            }
            .section {
                padding: 52px 0;
            }
            .section-head {
                margin-bottom: 36px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .hero-meta .pills {
                font-size: 12px;
                padding: 4px 10px;
            }
            .btn {
                width: 100%;
            }
        }