/* roulang page: index */
:root {
  --primary: #2F6DB3;
  --primary-dark: #28609E;
  --primary-light: #EAF1F9;
  --accent: #F08338;
  --accent-dark: #D9722A;
  --success: #178A50;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #1C2E40;
  --text-secondary: #52677A;
  --text-muted: #8CA2B5;
  --border: #E3EBF3;
  --font-family: 'Inter', -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-badge: 999px;
  --shadow-sm: 0 2px 10px rgba(28,46,64,0.06);
  --shadow-hover: 0 10px 24px rgba(28,46,64,0.10);
  --transition: 200ms ease;
  --container-width: 1200px;
  --section-space: 80px;
  --section-space-mobile: 48px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition), opacity var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol, li { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; line-height: normal; }
input, button { font-family: inherit; }
h1, h2, h3, h4, h5, p { margin: 0; }

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(47,109,179,0.18);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(47,109,179,0.26);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(47,109,179,0.16);
}
.btn-secondary {
  background: var(--card);
  color: var(--primary);
  border-color: var(--primary);
}
.btn-secondary:hover {
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(47,109,179,0.10);
}
.btn-secondary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(47,109,179,0.08);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(28,46,64,0.03);
  transition: box-shadow var(--transition), background var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 4px 18px rgba(28,46,64,0.08);
  background: #ffffff;
}
.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  transition: opacity var(--transition);
}
.nav-logo:hover { opacity: 0.88; color: var(--text); }
.logo-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  border-radius: 10px;
  color: #fff;
  font-size: 17px;
}
.logo-icon i { font-size: 16px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: all var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
  width: 210px;
  height: 38px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition), width var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47,109,179,0.10);
  background: #fff;
}
.search-box input {
  flex: 1;
  min-width: 0;
  border: none;
  outline: none;
  background: transparent;
  padding: 8px 4px 8px 14px;
  font-size: 14px;
  color: var(--text);
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box button {
  border: none;
  background: transparent;
  padding: 0 10px;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cmd-badge {
  margin-right: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}
.icon-btn {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  background: var(--bg);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  cursor: pointer;
  font-size: 15px;
  transition: all var(--transition);
}
.icon-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: rgba(47,109,179,0.2);
  transform: translateY(-2px);
}
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.hamburger:hover { background: var(--primary-light); }

/* ===== Mobile Menu ===== */
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 999;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 12px 28px rgba(28,46,64,0.10);
  padding: 20px 24px;
  display: none;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
}
.mobile-menu.open { display: flex; }
.mobile-search {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 10px 14px;
  gap: 8px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.mobile-search input {
  border: none;
  outline: none;
  background: transparent;
  flex: 1;
  font-size: 14px;
  color: var(--text);
}
.mobile-search input::placeholder { color: var(--text-muted); }
.mobile-link {
  display: block;
  padding: 12px 12px;
  border-radius: 10px;
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition);
}
.mobile-link:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.mobile-link.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.mobile-menu .btn-primary { width: 100%; margin-top: 4px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(rgba(245,248,252,0.88), rgba(255,255,255,0.95)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  padding: 90px 0 80px;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
}
.hero-badge i { color: var(--accent); }
.hero h1 {
  font-size: 40px;
  line-height: 1.28;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.hero h1 .highlight {
  color: var(--primary);
  position: relative;
  white-space: nowrap;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 30px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.stat strong {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.stat span {
  font-size: 14px;
  color: var(--text-muted);
}
.hero-cover {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.hero-cover img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.hero-cover-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(28,46,64,0.78);
  color: #fff;
  border-radius: var(--radius-badge);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(4px);
}

/* ===== Sections ===== */
.section {
  padding: var(--section-space) 0;
}
.section-alt { background: #fff; }
.section-head {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-head .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  background: rgba(240,131,56,0.10);
  border-radius: var(--radius-badge);
  padding: 5px 14px;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 10px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== Catalog ===== */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.catalog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.catalog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.catalog-card:hover::before { transform: scaleX(1); }
.catalog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.catalog-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 18px;
  transition: all var(--transition);
}
.catalog-card:nth-child(2) .catalog-icon { background: rgba(240,131,56,0.12); color: var(--accent); }
.catalog-card:nth-child(3) .catalog-icon { background: rgba(23,138,80,0.10); color: var(--success); }
.catalog-card:nth-child(4) .catalog-icon { background: rgba(47,109,179,0.08); color: var(--primary); }
.catalog-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.catalog-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}
.catalog-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.catalog-count {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.catalog-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.catalog-link i { transition: transform var(--transition); font-size: 12px; }
.catalog-card:hover .catalog-link i { transform: translateX(3px); }

/* ===== Featured ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.media-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.media-card .cover {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--primary-light);
}
.media-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms ease;
}
.media-card:hover .cover img { transform: scale(1.05); }
.media-card .cover .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(255,255,255,0.92);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(4px);
}
.media-card .card-body {
  padding: 20px 22px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.media-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 8px;
  transition: color var(--transition);
}
.media-card h3 a { color: inherit; }
.media-card h3 a:hover { color: var(--primary); }
.media-card .card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
  flex: 1;
}
.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.read-time {
  font-size: 13px;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.card-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: gap var(--transition);
}
.card-link:hover { gap: 8px; color: var(--primary-dark); }

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  border-radius: var(--radius-badge);
  font-weight: 600;
  line-height: 1.5;
}
.badge-accent {
  background: rgba(240,131,56,0.12);
  color: var(--accent);
}
.badge-green {
  background: rgba(23,138,80,0.10);
  color: var(--success);
}
.badge-default {
  background: #F0F4F8;
  color: var(--text-secondary);
}

/* ===== News list ===== */
.news-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.news-list-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 16px;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.news-list-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.news-thumb {
  width: 160px;
  height: 120px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-light);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}
.news-list-item:hover .news-thumb img { transform: scale(1.04); }
.news-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 6px;
}
.news-info h3 a { color: inherit; }
.news-info h3 a:hover { color: var(--primary); }
.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 10px;
}
.news-meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.news-meta-line .meta-time {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.meta-link {
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  transition: gap var(--transition);
}
.meta-link:hover { gap: 8px; }
.empty-state {
  border: 2px dashed var(--border);
  border-radius: var(--radius-card);
  padding: 56px 24px;
  text-align: center;
  background: #fff;
}
.empty-state i {
  font-size: 32px;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: block;
}
.empty-state p {
  font-size: 15px;
  color: var(--text-muted);
}

/* ===== Related ===== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}
.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}
.related-card .thumb {
  width: 72px;
  height: 58px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-light);
}
.related-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.related-card .related-body {
  min-width: 0;
}
.related-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.related-card h4 a { color: inherit; }
.related-card h4 a:hover { color: var(--primary); }
.related-card .cat-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== CTA Zone ===== */
.cta-zone {
  position: relative;
  padding: 70px 0;
  background: linear-gradient(rgba(255,255,255,0.92), rgba(255,255,255,0.96)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.cta-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.cta-inner .cta-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  box-shadow: 0 10px 26px rgba(47,109,179,0.25);
}
.cta-inner h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item.active {
  border-color: rgba(47,109,179,0.25);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--primary-light); }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: transform 300ms ease, background var(--transition), color var(--transition);
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  display: none;
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.active .faq-answer { display: block; }
.faq-answer strong { color: var(--text); font-weight: 600; }

/* ===== Footer ===== */
.site-footer {
  background: #14222F;
  color: rgba(255,255,255,0.72);
  padding: 56px 0 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand .footer-logo:hover { color: #fff; opacity: 0.92; }
.footer-brand .footer-logo .logo-icon {
  background: var(--primary);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.55);
  max-width: 360px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 14px;
  color: rgba(255,255,255,0.62);
  transition: color var(--transition), padding-left var(--transition);
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.10);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.42);
  flex-wrap: wrap;
}
.footer-bottom .footer-domain { font-weight: 500; color: rgba(255,255,255,0.55); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .catalog-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-cover { max-width: 560px; }
  .search-box { width: 180px; }
  .nav-links { margin-left: 0; }
  .nav-link { padding: 8px 12px; }
}
@media (max-width: 900px) {
  .site-header { height: auto; min-height: 64px; }
  .main-nav { height: auto; min-height: 64px; flex-wrap: wrap; padding: 10px 0; }
  .nav-links { display: none; }
  .nav-right .search-box { display: none; }
  .hamburger { display: inline-flex; }
  .nav-right { gap: 6px; }
  .nav-cta { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .news-list-item { flex-direction: column; }
  .news-thumb { width: 100%; height: 190px; }
  .hero h1 { font-size: 32px; }
  .hero-stats { gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}
@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 28px; }
  .hero-subtitle { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; }
  .catalog-grid, .feature-grid, .related-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn-primary, .cta-actions .btn-secondary { width: 100%; }
  .faq-question { font-size: 14px; padding: 16px 18px; }
  .faq-answer { padding: 0 18px 18px; }
  .news-info h3 { font-size: 15px; }
  .news-excerpt { -webkit-line-clamp: 3; }
  .stat { flex: 1 1 40%; }
  .hero-stats { gap: 16px; }
  .mobile-menu { padding: 16px; }
}

/* roulang page: article */
:root {
  --primary: #2F6DB3;
  --primary-dark: #245a95;
  --primary-light: #e8f0f8;
  --accent: #F08338;
  --accent-dark: #d6732a;
  --accent-light: #fdf0e6;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #1C2E40;
  --text-secondary: #52677A;
  --text-muted: #8CA2B5;
  --border: #E3EBF3;
  --success: #178A50;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-img: 10px;
  --radius-badge: 999px;
  --shadow-sm: 0 2px 10px rgba(28,46,64,0.06);
  --shadow-md: 0 10px 24px rgba(28,46,64,0.10);
  --transition: 200ms ease;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  --font-num: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }

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

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(28,46,64,0.05);
  height: 64px;
  display: flex;
  align-items: center;
}
.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
}
.nav-logo:hover { color: var(--text); }
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  box-shadow: 0 4px 10px rgba(47,109,179,0.25);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 7px 16px;
  border-radius: var(--radius-badge);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.nav-link:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: #f2f6fa;
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 0 6px 0 14px;
  height: 38px;
  width: 220px;
  transition: all var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47,109,179,0.12);
  background: #fff;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--text);
  flex: 1;
  min-width: 0;
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box button {
  color: var(--text-muted);
  font-size: 14px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.search-box button:hover { color: var(--primary); }
.cmd-badge {
  font-size: 11px;
  color: var(--text-muted);
  background: #eef2f6;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  font-family: var(--font-num);
  margin-right: 2px;
  white-space: nowrap;
}
.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-badge);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: #f2f6fa;
  border: 1px solid var(--border);
  font-size: 15px;
  transition: all var(--transition);
}
.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-light);
  transform: scale(1.05);
}
.icon-btn.active { color: var(--accent); background: var(--accent-light); border-color: var(--accent); }
.nav-cta {
  white-space: nowrap;
}
.hamburger {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-badge);
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  background: #f2f6fa;
  border: 1px solid var(--border);
  font-size: 16px;
  transition: all var(--transition);
}
.hamburger:hover { color: var(--primary); }

/* ========== Breadcrumb ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--text-secondary);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep {
  font-size: 11px;
  color: var(--text-muted);
}
.breadcrumb-current {
  color: var(--text-secondary);
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== Article Banner ========== */
.article-banner {
  position: relative;
  padding: 48px 0 32px;
  background-image: linear-gradient(rgba(255,255,255,0.92), rgba(255,255,255,0.88)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid var(--border);
}
.article-heading {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
  max-width: 860px;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 7px;
}
.meta-item i {
  color: var(--primary);
  font-size: 14px;
}

/* ========== Article Main ========== */
.article-main {
  padding: 48px 0 0;
}
.article-card {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 48px 56px;
  max-width: 920px;
  margin: 0 auto;
}
.article-content-wrap {
  max-width: 720px;
  margin: 0 auto;
}

/* Article typography */
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}
.article-content p {
  margin-bottom: 24px;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  line-height: 1.4;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  margin: 24px 0 10px;
}
.article-content img {
  border-radius: var(--radius-img);
  margin: 28px auto;
  box-shadow: var(--shadow-sm);
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 22px;
  border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
  margin: 28px 0;
  color: var(--text-secondary);
  font-style: normal;
}
.article-content ul,
.article-content ol {
  margin: 0 0 24px 24px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}
.article-content li::marker { color: var(--primary); }
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--accent); }
.article-content code {
  background: #f0f2f5;
  padding: 3px 8px;
  border-radius: 5px;
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--primary-dark);
}
.article-content pre {
  background: #1C2E40;
  color: #e8edf3;
  padding: 22px;
  border-radius: var(--radius-btn);
  overflow-x: auto;
  margin: 28px 0;
  font-family: var(--font-num);
  font-size: 14px;
  line-height: 1.6;
}
.article-content pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
}
.article-content th {
  background: var(--primary-light);
  color: var(--text);
  font-weight: 600;
  padding: 12px 16px;
  text-align: left;
}
.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 36px 0;
}
.article-content strong { font-weight: 600; }

/* Tags */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  background: #f2f6fa;
  border: 1px solid var(--border);
  border-radius: var(--radius-badge);
  padding: 6px 16px;
  transition: all var(--transition);
}
.tag:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
}

/* Actions */
.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  border: 1px solid var(--primary);
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(47,109,179,0.2);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  box-shadow: 0 6px 18px rgba(47,109,179,0.3);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(47,109,179,0.2);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  border: 1px solid var(--primary);
  transition: all var(--transition);
}
.btn-outline:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(47,109,179,0.12);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  border: 1px solid var(--accent);
  transition: all var(--transition);
  box-shadow: 0 4px 12px rgba(240,131,56,0.25);
}
.btn-accent:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  box-shadow: 0 6px 18px rgba(240,131,56,0.35);
  transform: translateY(-2px);
}

/* ========== Not Found ========== */
.article-not-found {
  text-align: center;
  padding: 60px 20px;
}
.article-not-found i {
  font-size: 48px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.article-not-found h2 {
  font-size: 24px;
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========== Return Band ========== */
.article-return {
  padding: 40px 0;
  text-align: center;
}
.article-return .btn-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ========== Related ========== */
.related-section {
  padding: 32px 0 72px;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  position: relative;
  padding-left: 18px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 26px;
  border-radius: 4px;
  background: var(--accent);
}
.section-more {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition);
}
.section-more:hover { color: var(--primary); gap: 10px; }

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.related-thumb {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--primary-light);
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}
.related-card:hover .related-thumb img {
  transform: scale(1.05);
}
.related-body {
  padding: 16px 20px 20px;
}
.related-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: var(--radius-badge);
  padding: 3px 12px;
  margin-bottom: 8px;
}
.related-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}
.related-card:hover .related-body h3 { color: var(--primary); }
.related-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========== CTA ========== */
.article-cta {
  padding: 56px 0 72px;
}
.cta-card {
  background: linear-gradient(135deg, #f8fafc 0%, #edf2f7 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 280px;
  background: url('/assets/images/backpic/back-3.png') no-repeat center/cover;
  opacity: 0.06;
  border-radius: 0 20px 0 0;
}
.cta-card h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cta-card p {
  color: var(--text-secondary);
  margin-bottom: 24px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ========== Footer ========== */
.site-footer {
  background: #14222F;
  color: #9fb0c0;
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-logo:hover { color: #fff; }
.footer-logo .logo-icon {
  background: rgba(255,255,255,0.12);
  box-shadow: none;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 360px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  color: #9fb0c0;
  font-size: 14px;
  transition: all var(--transition);
}
.footer-col ul a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: #7a8fa0;
}
.footer-domain {
  font-family: var(--font-num);
  font-size: 13px;
  color: #6c8394;
}

/* ========== Mobile Menu ========== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(28,46,64,0.12);
  z-index: 99;
  padding: 20px 24px;
  flex-direction: column;
  gap: 4px;
}
.mobile-menu.open { display: flex; }
.mobile-menu .nav-link {
  padding: 12px 16px;
  font-size: 16px;
  border-radius: var(--radius-btn);
}

/* ========== Focus States ========== */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(47,109,179,0.3);
  outline-offset: 2px;
}

/* ========== Responsive ========== */
@media (max-width: 1023px) {
  .search-box { width: 180px; }
  .nav-link { padding: 7px 12px; font-size: 14px; }
  .article-card { padding: 40px; }
  .article-heading { font-size: 30px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .nav-links { display: none; }
  .search-box { display: none; }
  .hamburger { display: flex; }
  .nav-cta { display: none; }
  .article-banner { padding: 36px 0 28px; }
  .article-heading { font-size: 26px; }
  .article-meta { gap: 14px; font-size: 13px; }
  .article-main { padding: 28px 0 0; }
  .article-card { padding: 28px 20px; border-radius: 12px; }
  .article-content { font-size: 15px; line-height: 1.75; }
  .article-content h2 { font-size: 21px; }
  .article-content h3 { font-size: 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-return .btn-group { flex-direction: column; }
  .cta-card { padding: 32px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-heading { font-size: 23px; }
  .model-thumb { height: 180px; }
  .breadcrumb { font-size: 13px; }
  .article-tags { gap: 6px; }
  .tag { padding: 5px 12px; font-size: 12px; }
  .btn-primary, .btn-outline, .btn-accent { width: 100%; }
  .article-actions { flex-direction: column; }
}

@media (min-width: 768px) {
  .mobile-menu { display: none !important; }
}

/* ========== Toast ========== */
.site-toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1C2E40;
  color: #fff;
  font-size: 14px;
  padding: 12px 28px;
  border-radius: var(--radius-badge);
  box-shadow: 0 10px 30px rgba(28,46,64,0.3);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: all 300ms ease;
}
.site-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.site-toast i {
  color: var(--success);
  font-size: 16px;
}

/* roulang page: category1 */
:root {
  --primary: #2F6DB3;
  --primary-dark: #245890;
  --accent: #F08338;
  --bg: #F5F8FC;
  --card-bg: #FFFFFF;
  --text: #1C2E40;
  --text-secondary: #52677A;
  --text-muted: #8CA2B5;
  --border: #E3EBF3;
  --success: #178A50;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --shadow: 0 2px 10px rgba(28,46,64,0.06);
  --shadow-hover: 0 10px 24px rgba(28,46,64,0.10);
  --transition: 200ms ease;
  --font-sans: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --nav-h: 64px;
  --section-space: 80px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
button { font-family: var(--font-sans); cursor: pointer; }
input, button { outline: none; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-space) 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-header h2 { font-size: 28px; font-weight: 700; color: var(--text); line-height: 1.3; margin-bottom: 12px; }
.section-header p { font-size: 16px; color: var(--text-secondary); line-height: 1.7; }
.section-header .divider-line { width: 48px; height: 3px; background: var(--accent); border-radius: 3px; margin: 16px auto 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; box-shadow: 0 6px 16px rgba(47,109,179,0.28); transform: translateY(-1px); }
.btn-secondary { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-secondary:hover { border-color: var(--primary-dark); color: var(--primary-dark); background: rgba(47,109,179,0.06); }
.btn-outline { background: transparent; border-color: #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.14); color: #fff; }
.btn-lg { padding: 16px 32px; font-size: 16px; border-radius: 12px; }
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 8px; }
.btn-block { width: 100%; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 14px;
  background: rgba(47,109,179,0.10);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  line-height: 1.4;
}
.badge-accent { background: rgba(240,131,56,0.14); color: #d96f1f; }
.badge-success { background: rgba(23,138,80,0.12); color: var(--success); }

/* Header / Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(28,46,64,0.04);
}
.main-nav { display: flex; align-items: center; justify-content: space-between; height: var(--nav-h); }
.nav-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--text); }
.nav-logo:hover { color: var(--text); }
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  box-shadow: 0 4px 10px rgba(47,109,179,0.24);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
}
.nav-link:hover { color: var(--primary); background: rgba(47,109,179,0.06); }
.nav-link.active { background: rgba(47,109,179,0.12); color: var(--primary); font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 12px; }
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-box input {
  width: 220px;
  height: 38px;
  padding: 0 42px 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: #F0F4F9;
  font-size: 13px;
  color: var(--text);
  transition: all var(--transition);
}
.search-box input:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47,109,179,0.14);
  width: 260px;
}
.search-box button {
  position: absolute;
  right: 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  padding: 6px;
  border-radius: 50%;
  transition: color var(--transition);
}
.search-box button:hover { color: var(--primary); }
.cmd-badge {
  position: absolute;
  right: 34px;
  font-size: 11px;
  color: var(--text-muted);
  background: #fff;
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 5px;
  pointer-events: none;
  line-height: 1.2;
}
.icon-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 50%;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); box-shadow: 0 4px 12px rgba(47,109,179,0.12); }
.hamburger {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  color: var(--text);
  font-size: 16px;
  align-items: center;
  justify-content: center;
}
.hamburger:hover { border-color: var(--primary); color: var(--primary); }

/* Hero */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.86) 45%, rgba(255,255,255,0.62) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  min-height: 520px;
  padding: 72px 0;
}
.hero-left { flex: 1 1 55%; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(240,131,56,0.14);
  color: #d96f1f;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}
.hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}
.hero h1 .hl {
  background: linear-gradient(transparent 62%, rgba(240,131,56,0.28) 62%);
  padding: 0 2px;
}
.hero-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-right { flex: 1 1 45%; display: flex; justify-content: center; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  width: 100%;
  max-width: 380px;
}
.stat-card {
  background: rgba(255,255,255,0.88);
  border-radius: var(--radius-card);
  padding: 24px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.7);
  backdrop-filter: blur(4px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.stat-num {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-card:nth-child(2) .stat-num,
.stat-card:nth-child(3) .stat-num { color: var(--accent); }
.stat-label { display: block; font-size: 13px; color: var(--text-secondary); font-weight: 500; }

/* Features */
.features-section { background: var(--bg); }
.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(47,109,179,0.15); }
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(47,109,179,0.10);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 18px;
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: var(--primary); color: #fff; transform: rotate(-6deg) scale(1.05); }
.feature-card h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* Collection */
.collection-section { background: var(--bg); }
.collection-grid { row-gap: 28px; }
.content-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card-cover { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms ease; }
.content-card:hover .card-cover img { transform: scale(1.04); }
.card-cover .badge { position: absolute; top: 14px; left: 14px; background: rgba(255,255,255,0.92); box-shadow: 0 2px 8px rgba(28,46,64,0.10); }
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 8px; line-height: 1.4; }
.card-body h3 a { color: inherit; }
.card-body h3 a:hover { color: var(--primary); }
.card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.card-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.card-meta span { font-size: 13px; color: var(--text-muted); display: inline-flex; align-items: center; gap: 5px; }
.card-meta a {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(47,109,179,0.08);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: all var(--transition);
}
.card-meta a:hover { background: var(--primary); color: #fff; }

/* Media Blocks */
.media-section { background: #fff; }
.media-row {
  display: flex;
  align-items: center;
  gap: 56px;
  max-width: 1080px;
  margin: 0 auto 64px;
}
.media-row:last-child { margin-bottom: 0; }
.media-img { flex: 1 1 46%; }
.media-img img { border-radius: var(--radius-card); box-shadow: var(--shadow-hover); width: 100%; }
.media-content { flex: 1 1 54%; }
.media-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.media-content h2 { font-size: 26px; font-weight: 700; color: var(--text); line-height: 1.35; margin-bottom: 16px; }
.media-content p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.media-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 14px;
  color: var(--text);
}
.media-list li i { color: var(--success); font-size: 14px; width: 18px; text-align: center; }
.media-row-reverse { flex-direction: row-reverse; }
.media-row-detail { background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat; border-radius: var(--radius-card); padding: 40px; color: #fff; margin-top: 40px; }
.media-row-detail h3 { font-size: 20px; margin-bottom: 10px; }
.media-row-detail p { color: rgba(255,255,255,0.88); }

/* Scenarios */
.scenario-section { background: var(--bg); }
.scenario-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  height: 100%;
}
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(240,131,56,0.25); }
.scenario-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: rgba(240,131,56,0.12);
  color: #d96f1f;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  transition: all var(--transition);
}
.scenario-card:hover .scenario-icon { background: var(--accent); color: #fff; transform: scale(1.06); }
.scenario-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* FAQ */
.faq-section { background: #fff; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  background: var(--card-bg);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.faq-item.active { border-color: rgba(47,109,179,0.35); box-shadow: 0 6px 20px rgba(28,46,64,0.08); }
.faq-header {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color var(--transition);
}
.faq-header:hover { color: var(--primary); }
.faq-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(47,109,179,0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: transform 300ms ease, background var(--transition), color var(--transition);
}
.faq-item.active .faq-icon { transform: rotate(45deg); background: var(--primary); color: #fff; }
.faq-body { max-height: 0; overflow: hidden; transition: max-height 300ms ease; }
.faq-body p { padding: 0 24px 22px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }

/* CTA */
.cta-section {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.cta-box {
  background: #14222F;
  border-radius: 22px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  color: #fff;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  opacity: 0.22;
}
.cta-box > * { position: relative; z-index: 1; }
.cta-box h2 { font-size: 30px; font-weight: 800; margin-bottom: 14px; color: #fff; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 34px; line-height: 1.8; }
.cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

/* Footer */
.site-footer { background: #14222F; color: rgba(255,255,255,0.72); padding: 60px 0 28px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}
.footer-logo:hover { color: #fff; }
.footer-logo .logo-icon { background: var(--primary); box-shadow: none; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,0.65); font-size: 14px; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-domain { font-family: 'Inter', var(--font-sans); letter-spacing: 0.4px; }

/* Responsive */
@media (max-width: 1024px) {
  .hero-content { gap: 32px; }
  .hero h1 { font-size: 36px; }
  .stat-num { font-size: 28px; }
  .media-row, .media-row-reverse { flex-direction: column; gap: 32px; }
  .media-img, .media-content { flex: 1 1 100%; }
}
@media (max-width: 768px) {
  :root { --section-space: 56px; }
  .section-header h2 { font-size: 24px; }
  .hero-content { flex-direction: column; padding: 56px 0; min-height: auto; }
  .hero-left { display: flex; flex-direction: column; align-items: flex-start; }
  .hero h1 { font-size: 32px; }
  .hero-stats { max-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-box { padding: 44px 24px; }
  .cta-box h2 { font-size: 24px; }
}
@media (max-width: 640px) {
  .main-nav { flex-wrap: wrap; height: auto; padding: 12px 0; gap: 8px; }
  .site-header { height: auto; }
  .nav-links {
    display: none;
    width: 100%;
    order: 3;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav-links.mobile-open { display: flex; }
  .nav-right {
    display: none;
    width: 100%;
    order: 4;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0 4px;
  }
  .nav-right.mobile-open { display: flex; }
  .nav-link { padding: 12px 14px; border-radius: 10px; justify-content: center; }
  .search-box { flex: 1; min-width: 160px; }
  .search-box input, .search-box input:focus { width: 100%; }
  .cmd-badge { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: inline-flex; }
  .hero h1 { font-size: 28px; }
  .hero-text { font-size: 15px; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 18px 10px; }
  .stat-num { font-size: 24px; }
  .media-row-detail { padding: 28px 20px; }
  .cta-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .section-header h2 { font-size: 22px; }
  .hero h1 { font-size: 26px; }
  .hero-actions .btn { padding: 14px 18px; font-size: 14px; }
  .card-body { padding: 16px; }
  .cta-box { padding: 36px 18px; }
}

/* roulang page: category2 */
:root {
  --primary: #2F6DB3;
  --primary-dark: #245a94;
  --primary-light: rgba(47, 109, 179, 0.08);
  --accent: #F08338;
  --accent-light: rgba(240, 131, 56, 0.12);
  --bg: #F5F8FC;
  --card-bg: #FFFFFF;
  --text-main: #1C2E40;
  --text-sub: #52677A;
  --text-weak: #8CA2B5;
  --border: #E3EBF3;
  --success: #178A50;
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --radius-badge: 999px;
  --shadow-normal: 0 2px 10px rgba(28, 46, 64, 0.06);
  --shadow-hover: 0 10px 24px rgba(28, 46, 64, 0.10);
  --transition: 200ms ease;
  --header-h: 64px;
  --container-w: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--primary-dark);
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  border: none;
  outline: none;
}

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ========== 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-h);
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(28, 46, 64, 0.04);
}

.main-nav {
  display: flex;
  align-items: center;
  height: var(--header-h);
  gap: 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo:hover {
  color: var(--primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #ffffff;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 4px 12px rgba(47, 109, 179, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-badge);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: all var(--transition);
}

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

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

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.search-box {
  position: relative;
  display: flex;
  align-items: center;
  width: 240px;
  height: 38px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
  padding: 0 38px 0 14px;
  transition: all var(--transition);
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47, 109, 179, 0.12);
  background: #ffffff;
}

.search-box input {
  width: 100%;
  height: 100%;
  background: transparent;
  font-size: 14px;
  color: var(--text-main);
}

.search-box input::placeholder {
  color: var(--text-weak);
}

.search-box button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-weak);
  border-radius: 8px;
  transition: all var(--transition);
}

.search-box button:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.cmd-badge {
  position: absolute;
  right: 38px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-weak);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  pointer-events: none;
}

.icon-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-sub);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.icon-btn:hover {
  color: var(--accent);
  background: var(--accent-light);
  border-color: rgba(240, 131, 56, 0.3);
}

.icon-btn.favorited {
  color: var(--accent);
  background: var(--accent-light);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--primary);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  box-shadow: 0 4px 14px rgba(47, 109, 179, 0.25);
  transition: all var(--transition);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(47, 109, 179, 0.30);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(47, 109, 179, 0.20);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(47, 109, 179, 0.35);
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  background: #ffffff;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-btn);
  transition: all var(--transition);
}

.btn-secondary:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-dark);
  transform: translateY(-1px);
}

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

.btn-secondary:focus-visible {
  outline: 3px solid rgba(47, 109, 179, 0.30);
  outline-offset: 2px;
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 8px;
}

.hamburger {
  display: none;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 16px;
  transition: all var(--transition);
}

.hamburger:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 12px 24px rgba(28, 46, 64, 0.08);
  padding: 16px 24px 20px;
  z-index: 999;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  transition: all var(--transition);
}

.mobile-menu a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.mobile-menu a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* ========== 页面 Hero ========== */
.page-hero {
  position: relative;
  background: linear-gradient(100deg, #ffffff 0%, rgba(245, 248, 252, 0.92) 45%, rgba(245, 248, 252, 0.85) 100%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.55);
  pointer-events: none;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 32px;
}

.breadcrumb a {
  color: var(--text-weak);
  transition: color var(--transition);
}

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

.breadcrumb span {
  color: var(--border);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-badge);
  margin-bottom: 18px;
}

.hero-badge i {
  font-size: 12px;
}

.page-hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.page-hero .hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-sub);
  max-width: 640px;
  margin-bottom: 32px;
}

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

.hero-actions .btn-primary, .hero-actions .btn-secondary {
  padding: 13px 30px;
}

/* ========== 通用板块 ========== */
.section {
  padding: 80px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 14px;
  border-radius: var(--radius-badge);
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ========== 资料卡片网格 ========== */
.resource-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-normal);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

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

.resource-card-img {
  position: relative;
  height: 190px;
  overflow: hidden;
}

.resource-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.resource-card:hover .resource-card-img img {
  transform: scale(1.04);
}

.resource-card-img .card-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  box-shadow: 0 2px 8px rgba(28, 46, 64, 0.08);
  backdrop-filter: blur(4px);
}

.resource-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.resource-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 10px;
}

.resource-card-body h3 a {
  color: inherit;
}

.resource-card-body h3 a:hover {
  color: var(--primary);
}

.resource-card-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-weak);
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.card-meta .read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition);
}

.card-meta .read-more:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ========== 适用场景 ========== */
.scene-section {
  background: #ffffff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.scene-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  height: 100%;
  transition: all var(--transition);
}

.scene-card:hover {
  background: #ffffff;
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.scene-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.scene-card:hover .scene-icon {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(47, 109, 179, 0.25);
}

.scene-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}

.scene-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
}

/* ========== 内容介绍区块 ========== */
.intro-block {
  background: var(--bg);
}

.intro-block + .intro-block {
  background: #ffffff;
  border-top: 1px solid var(--border);
}

.intro-image {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  line-height: 0;
}

.intro-image img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

.intro-content {
  padding: 24px 0;
}

.intro-content .section-tag {
  margin-bottom: 16px;
}

.intro-content h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.35;
  margin-bottom: 16px;
}

.intro-content p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
  margin-bottom: 16px;
}

.intro-points {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.intro-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

.intro-points li i {
  color: var(--success);
  font-size: 15px;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ========== 相关推荐 ========== */
.related-section {
  background: #ffffff;
  border-top: 1px solid var(--border);
}

.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 14px;
  height: 100%;
  transition: all var(--transition);
}

.related-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.related-thumb {
  width: 120px;
  height: 84px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  line-height: 0;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-info {
  flex: 1;
  min-width: 0;
}

.related-info .related-badge {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-badge);
  display: inline-block;
  margin-bottom: 6px;
}

.related-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.related-info h4 a {
  color: inherit;
}

.related-info h4 a:hover {
  color: var(--primary);
}

.related-info span {
  font-size: 13px;
  color: var(--text-weak);
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

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

.faq-item.active {
  border-color: rgba(47, 109, 179, 0.3);
  box-shadow: 0 4px 16px rgba(47, 109, 179, 0.06);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  width: 100%;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  transition: color var(--transition);
}

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

.faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #ffffff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-sub);
  border-top: 1px solid transparent;
  transition: border-color var(--transition);
}

.faq-item.active .faq-answer-inner {
  border-top-color: var(--border);
  padding-top: 16px;
}

/* ========== CTA ========== */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(120deg, #F5F8FC 0%, #EDF3F9 100%);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -80px;
  width: 320px;
  height: 320px;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  opacity: 0.06;
  border-radius: 50%;
  pointer-events: none;
}

.cta-box {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.cta-box h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.3;
}

.cta-box p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-actions .btn-primary {
  background: var(--accent);
  box-shadow: 0 4px 14px rgba(240, 131, 56, 0.25);
}

.cta-actions .btn-primary:hover {
  background: #e0701e;
  box-shadow: 0 6px 18px rgba(240, 131, 56, 0.30);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #14222F;
  color: #B0C4D9;
  padding: 64px 0 24px;
}

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

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-brand .footer-logo:hover {
  color: #ffffff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: #8CA2B5;
  max-width: 360px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col a {
  font-size: 14px;
  color: #8CA2B5;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-col a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: #6C8498;
}

.footer-domain {
  font-family: "Inter", "PingFang SC", monospace;
  letter-spacing: 0.02em;
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .section {
    padding: 64px 0;
  }

  .page-hero {
    padding: 56px 0 48px;
  }

  .page-hero h1 {
    font-size: 34px;
  }

  .nav-links {
    display: none;
  }

  .search-box {
    width: 180px;
  }

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

@media (max-width: 767px) {
  .nav-cta {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 48px 0;
  }

  .container {
    padding: 0 16px;
  }

  .site-header .main-nav {
    gap: 12px;
  }

  .search-box {
    display: none;
  }

  .icon-btn {
    width: 36px;
    height: 36px;
  }

  .hamburger {
    display: flex;
  }

  .page-hero {
    padding: 44px 0 40px;
  }

  .page-hero h1 {
    font-size: 28px;
  }

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

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    padding: 13px 20px;
  }

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

  .section-head h2 {
    font-size: 23px;
  }

  .section-head p {
    font-size: 14px;
  }

  .intro-image img {
    height: 240px;
  }

  .intro-content {
    padding: 16px 0 0;
  }

  .intro-block + .intro-block .intro-content {
    padding: 16px 0 0;
  }

  .cta-section {
    padding: 48px 0;
  }

  .cta-box h2 {
    font-size: 23px;
  }

  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    width: 100%;
  }

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

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

  .faq-question {
    font-size: 14px;
    padding: 16px 18px;
  }

  .faq-answer-inner {
    padding: 0 18px 16px;
    font-size: 13px;
  }
}