/* roulang page: index */
:root {
  --primary: #1a56f0;
  --primary-dark: #0f3cd1;
  --primary-light: #e8efff;
  --accent: #ff6b35;
  --accent-light: #fff1eb;
  --success: #10b981;
  --bg: #f4f6fb;
  --bg-deep: #0e1933;
  --bg-white: #ffffff;
  --text: #172033;
  --text-light: #65708a;
  --text-mute: #9aa5bd;
  --border: #e4e8f0;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(20, 30, 60, 0.05);
  --shadow-md: 0 6px 26px rgba(20, 30, 60, 0.08);
  --shadow-lg: 0 16px 44px rgba(20, 30, 60, 0.13);
  --transition: all 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  margin: 0;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
p { margin: 0 0 1rem; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.grid-x { display: flex; flex-wrap: wrap; }
.cell { flex: 1; }
.cell.shrink { flex: 0 0 auto; }
.cell.auto { flex: 1; }

/* Header 双层导航 */
.site-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.header-top {
  padding: 12px 0;
  border-bottom: 1px solid rgba(228, 232, 240, 0.6);
}

.brand-logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-logo i {
  color: var(--primary);
  font-size: 1.4rem;
  background: var(--primary-light);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-logo:hover { color: var(--text); }
.brand-logo span { color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 5px 6px 5px 16px;
  transition: var(--transition);
  width: 220px;
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 240, 0.12);
  background: #fff;
}
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.85rem;
  width: 100%;
  color: var(--text);
}
.search-box button {
  border: none;
  background: var(--primary);
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.8rem;
  transition: var(--transition);
}
.search-box button:hover { background: var(--primary-dark); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  line-height: 1.4;
}
.btn-primary { background: var(--primary); color: #fff !important; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(26, 86, 240, 0.28); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff !important; transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary-dark) !important; }
.btn-light:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 22px rgba(255, 255, 255, 0.2); }
.btn-accent { background: var(--accent); color: #fff !important; }
.btn-accent:hover { background: #e85a28; transform: translateY(-2px); box-shadow: 0 8px 22px rgba(255, 107, 53, 0.3); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }

.btn:focus-visible, a:focus-visible, input:focus-visible {
  outline: 3px solid rgba(26, 86, 240, 0.4);
  outline-offset: 2px;
}

/* 二级频道导航 */
.channel-nav {
  background: var(--bg-white);
  padding: 0;
}
.channel-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.channel-tabs::-webkit-scrollbar { height: 3px; }
.channel-tabs::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }
.channel-tabs li { flex-shrink: 0; }
.channel-tabs a {
  display: inline-block;
  padding: 8px 22px;
  border-radius: 30px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-light);
  background: transparent;
  transition: var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}
.channel-tabs a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.channel-tabs a.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(26, 86, 240, 0.24);
}

/* Hero */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0b1d3f 0%, #132d5e 45%, #1b3f80 100%);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 100px 0 110px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(11, 20, 40, 0.9) 10%, rgba(15, 35, 75, 0.75) 55%, rgba(26, 86, 240, 0.35) 100%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #e2e8ff;
  padding: 7px 18px;
  border-radius: 40px;
  font-size: 0.8rem;
  backdrop-filter: blur(6px);
  margin-bottom: 22px;
}
.hero-badge i { color: #ffb86b; }

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.18;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(90deg, #5b8aff, #8ab4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.12rem;
  color: rgba(225, 232, 255, 0.88);
  max-width: 620px;
  margin-bottom: 32px;
  line-height: 1.8;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}
.hero-stat-item .num {
  font-size: 1.7rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.hero-stat-item .label {
  font-size: 0.8rem;
  color: rgba(210, 220, 255, 0.7);
}

/* Section 通用 */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-white); }
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 5px 14px;
  border-radius: 30px;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}
.section-head { margin-bottom: 40px; }
.text-center { text-align: center; }
.text-center .section-subtitle { margin-left: auto; margin-right: auto; }

/* 特色卡片 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  transition: var(--transition);
  position: relative;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), #6f9bff);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
.feature-card:hover::after { transform: scaleX(1); }
.feature-icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.feature-icon.blue { background: var(--primary-light); color: var(--primary); }
.feature-icon.orange { background: var(--accent-light); color: var(--accent); }
.feature-icon.green { background: #e4f7ef; color: var(--success); }
.feature-card h3 { font-size: 1.18rem; font-weight: 700; margin-bottom: 10px; }
.feature-card p { color: var(--text-light); font-size: 0.92rem; margin: 0; }

/* 数据统计条 */
.stats-band {
  background: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 62px 0;
  position: relative;
}
.stats-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(14, 25, 51, 0.88);
}
.stats-band .container { position: relative; z-index: 1; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-block .stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}
.stat-block .stat-num small { font-size: 1.2rem; color: #8fb0ff; }
.stat-block .stat-text {
  color: rgba(210, 222, 255, 0.7);
  font-size: 0.88rem;
  margin-top: 4px;
}

/* 分类入口 */
.category-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}
.category-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}
.category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.category-card .cover {
  height: 210px;
  overflow: hidden;
  position: relative;
}
.category-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.category-card:hover .cover img { transform: scale(1.05); }
.category-card .cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 20, 40, 0.35));
}
.category-card .body { padding: 28px 30px 30px; flex: 1; display: flex; flex-direction: column; }
.category-card .tag {
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 30px;
  margin-bottom: 12px;
}
.tag-blue { background: var(--primary-light); color: var(--primary); }
.tag-orange { background: var(--accent-light); color: var(--accent); }
.category-card h3 { font-size: 1.35rem; font-weight: 800; margin-bottom: 8px; }
.category-card p { color: var(--text-light); font-size: 0.9rem; flex: 1; margin-bottom: 18px; }
.category-card .link {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.category-card .link i { transition: transform 0.2s ease; }
.category-card .link:hover i { transform: translateX(4px); }

/* 流程 */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 20px;
}
.step-item {
  text-align: center;
  padding: 30px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
}
.step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.3rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.step-item:not(:last-child) .step-num::after {
  content: '';
  position: absolute;
  left: calc(100% + 20px);
  top: 50%;
  width: 40px;
  height: 2px;
  background: dashed var(--primary);
  opacity: 0.3;
}
.step-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.step-item p { font-size: 0.85rem; color: var(--text-light); margin: 0; }

/* 资讯列表 */
.news-list-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  align-items: start;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.news-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  transition: var(--transition);
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
}
.news-card:hover { box-shadow: var(--shadow-md); transform: translateX(4px); border-left: 4px solid var(--primary); }
.news-card .news-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.news-card .news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.news-card .badge {
  font-size: 0.72rem;
  padding: 3px 12px;
  border-radius: 20px;
  font-weight: 600;
  background: var(--primary-light);
  color: var(--primary);
}
.news-card .news-date { font-size: 0.78rem; color: var(--text-mute); }
.news-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 6px; line-height: 1.45; }
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--primary); }
.news-card p { font-size: 0.86rem; color: var(--text-light); margin-bottom: 10px; line-height: 1.6; }
.news-card .more {
  font-size: 0.82rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-card .more i { font-size: 0.7rem; }

.news-side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-side-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px;
  box-shadow: var(--shadow-sm);
}
.news-side-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.news-side-card h4 i { color: var(--primary); }
.news-side-card ul { display: flex; flex-direction: column; gap: 10px; }
.news-side-card li a {
  color: var(--text-light);
  font-size: 0.86rem;
  display: flex;
  align-items: center;
  gap: 8px;
  line-height: 1.5;
}
.news-side-card li a::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c0cbf0;
  flex-shrink: 0;
}
.news-side-card li a:hover { color: var(--primary); }
.news-side-card li a:hover::before { background: var(--primary); }

/* FAQ */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.accordion-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.accordion-item:hover { box-shadow: var(--shadow-md); }
.accordion-item.is-active { border-color: var(--primary); }
.accordion-title {
  padding: 20px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
  gap: 14px;
}
.accordion-title i {
  font-size: 0.85rem;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.accordion-item.is-active .accordion-title i { transform: rotate(180deg); }
.accordion-title:hover { color: var(--primary); }
.accordion-content {
  padding: 0 26px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.accordion-item.is-active .accordion-content {
  max-height: 300px;
  padding-bottom: 22px;
}
.accordion-content p { font-size: 0.9rem; color: var(--text-light); margin: 0; }

/* CTA */
.cta-section {
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  padding: 76px 0;
  text-align: center;
  position: relative;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(26, 86, 240, 0.86);
}
.cta-section .container { position: relative; z-index: 1; }
.cta-title { font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.cta-desc { font-size: 1rem; color: rgba(255, 255, 255, 0.85); max-width: 580px; margin: 0 auto 28px; }

/* Footer */
.site-footer {
  background: var(--bg-deep);
  padding: 60px 0 40px;
  color: rgba(225, 232, 255, 0.7);
}
.site-footer .container { max-width: 1200px; }
.footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 30px; margin-bottom: 30px; }
.footer-brand .brand-logo { color: #fff; margin-bottom: 12px; }
.footer-brand .brand-logo i { background: rgba(255,255,255,0.1); color: #8fb0ff; }
.footer-desc { font-size: 0.85rem; max-width: 320px; margin: 0; line-height: 1.7; }
.footer-links { display: flex; gap: 60px; flex-wrap: wrap; }
.footer-links h5 { color: #fff; font-size: 0.92rem; margin-bottom: 14px; font-weight: 700; }
.footer-links ul { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: rgba(225, 232, 255, 0.65); font-size: 0.85rem; transition: var(--transition); }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: rgba(200, 215, 255, 0.45);
}

/* Responsive */
@media screen and (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .news-list-wrap { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 2.4rem; }
}

@media screen and (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero { padding: 70px 0 80px; }
  .hero-title { font-size: 1.9rem; }
  .hero-desc { font-size: 0.98rem; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .hero-stat-item .num { font-size: 1.4rem; }
  .header-actions .search-box { display: none; }
  .category-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-top { flex-direction: column; }
  .footer-links { gap: 30px; }
  .section-title { font-size: 1.6rem; }
  .cta-title { font-size: 1.5rem; }
  .channel-tabs { padding: 6px 0; }
  .brand-logo { font-size: 1.35rem; }
  .brand-logo i { width: 34px; height: 34px; font-size: 1.1rem; }
}

@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero { padding: 56px 0 64px; }
  .hero-title { font-size: 1.55rem; }
  .hero-desc { font-size: 0.9rem; }
  .hero-actions .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-block .stat-num { font-size: 1.8rem; }
  .steps-grid { grid-template-columns: 1fr; }
  .channel-tabs a { padding: 7px 16px; font-size: 0.82rem; }
  .feature-card { padding: 26px 22px; }
  .news-card { padding: 18px 16px; flex-direction: column; gap: 10px; }
  .news-card .news-icon { display: none; }
  .btn { padding: 11px 22px; font-size: 0.9rem; }
  .accordion-title { padding: 16px 18px; font-size: 0.88rem; }
  .accordion-content { padding: 0 18px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .header-top { padding: 10px 0; }
  .header-actions .btn { display: none; }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
    :root {
      --primary: #2563eb;
      --primary-dark: #1e40af;
      --primary-light: #dbeafe;
      --accent: #f59e0b;
      --accent-light: #fef3c7;
      --bg: #f6f9fc;
      --surface: #ffffff;
      --text: #0f172a;
      --text-light: #64748b;
      --text-muted: #94a3b8;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.1);
      --transition: all 0.3s ease;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    ul,
    ol {
      list-style: none;
    }

    button,
    input {
      font-family: inherit;
      font-size: inherit;
      color: inherit;
      border: none;
      background: none;
    }

    button {
      cursor: pointer;
    }

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

    .section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.3;
      margin-bottom: 12px;
      color: var(--text);
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-light);
      max-width: 640px;
      margin-bottom: 40px;
    }

    .text-center {
      text-align: center;
    }

    .mx-auto {
      margin-left: auto;
      margin-right: auto;
    }

    /* ============ 按钮 ============ */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      line-height: 1.2;
      border: 2px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
      color: #fff;
    }

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

    .btn-outline:hover,
    .btn-outline:focus {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      transform: translateY(-2px);
      color: #fff;
    }

    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
    }

    .btn-accent:hover,
    .btn-accent:focus {
      background: #d97706;
      transform: translateY(-2px);
      color: #fff;
    }

    .btn-sm {
      padding: 8px 18px;
      font-size: 0.88rem;
      border-radius: 8px;
    }

    .btn:active {
      transform: translateY(0);
      box-shadow: none;
    }

    /* ============ 头部导航 ============ */
    .site-header {
      position: relative;
      background: var(--surface);
      box-shadow: 0 1px 0 var(--border);
      z-index: 100;
    }

    .header-top {
      background: var(--surface);
      padding: 14px 0;
      border-bottom: 1px solid var(--border);
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
    }

    .brand-logo i {
      font-size: 1.25rem;
      color: var(--accent);
    }

    .brand-logo span {
      color: var(--text);
      font-weight: 400;
    }

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

    .search-box {
      display: flex;
      align-items: center;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 40px;
      padding: 4px 6px 4px 16px;
      transition: var(--transition);
      min-width: 220px;
    }

    .search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
      background: #fff;
    }

    .search-box input {
      flex: 1;
      border: none;
      outline: none;
      font-size: 0.9rem;
      padding: 6px 0;
      background: transparent;
      color: var(--text);
    }

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

    .search-box button {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

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

    .channel-nav {
      background: var(--surface);
      padding: 0;
      border-bottom: 1px solid var(--border);
    }

    .channel-tabs {
      display: flex;
      align-items: center;
      gap: 4px;
      margin: 0;
      padding: 0;
      overflow-x: auto;
      scrollbar-width: none;
      -webkit-overflow-scrolling: touch;
    }

    .channel-tabs::-webkit-scrollbar {
      display: none;
    }

    .channel-tabs li {
      flex-shrink: 0;
    }

    .channel-tabs a {
      display: block;
      padding: 14px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-light);
      border-bottom: 3px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .channel-tabs a:hover,
    .channel-tabs a:focus {
      color: var(--primary);
      background: var(--primary-light);
    }

    .channel-tabs a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
      background: rgba(37, 99, 235, 0.06);
    }

    /* ============ 页脚 ============ */
    .site-footer {
      background: #0e1a2d;
      color: #cbd5e1;
      padding: 70px 0 30px;
      margin-top: 40px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr;
      gap: 50px;
      padding-bottom: 45px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-brand .brand-logo {
      color: #fff;
      font-size: 1.4rem;
      margin-bottom: 16px;
    }

    .footer-brand .brand-logo span {
      color: #e2e8f0;
    }

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

    .footer-desc {
      font-size: 0.92rem;
      line-height: 1.8;
      color: #94a3b8;
      max-width: 340px;
      margin-top: 10px;
    }

    .footer-links {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .footer-links h5 {
      color: #fff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

    .footer-links ul a {
      color: #94a3b8;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links ul a:hover {
      color: #fff;
      padding-left: 4px;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 28px;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* ============ 分类页 Hero ============ */
    .page-hero {
      position: relative;
      background: linear-gradient(rgba(15, 23, 42, 0.72), rgba(15, 23, 42, 0.78)), url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
      padding: 100px 0 90px;
      color: #fff;
      text-align: center;
    }

    .page-hero .breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.88rem;
      color: rgba(255, 255, 255, 0.7);
      background: rgba(255, 255, 255, 0.1);
      padding: 6px 18px;
      border-radius: 30px;
      backdrop-filter: blur(4px);
      margin-bottom: 28px;
    }

    .page-hero .breadcrumb a:hover {
      color: #fff;
    }

    .page-hero h1 {
      font-size: 3rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      margin-bottom: 18px;
      line-height: 1.2;
    }

    .page-hero .lead {
      font-size: 1.2rem;
      font-weight: 400;
      color: rgba(255, 255, 255, 0.8);
      max-width: 620px;
      margin: 0 auto 36px;
    }

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

    /* ============ 核心价值卡片 ============ */
    .value-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 10px;
    }

    .value-card {
      background: var(--surface);
      border-radius: var(--radius);
      padding: 34px 28px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      text-align: left;
    }

    .value-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
    }

    .value-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: 1.4rem;
      margin-bottom: 20px;
    }

    .value-card:nth-child(2) .value-icon {
      background: var(--accent-light);
      color: #d97706;
    }

    .value-card:nth-child(3) .value-icon {
      background: #ecfdf5;
      color: #059669;
    }

    .value-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .value-card p {
      font-size: 0.92rem;
      color: var(--text-light);
      line-height: 1.7;
    }

    /* ============ 四步流程 ============ */
    .steps-section {
      background: var(--surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    .step-item {
      position: relative;
      padding: 36px 20px 24px;
      background: var(--bg);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      transition: var(--transition);
      text-align: center;
    }

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

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 16px;
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
    }

    .step-item h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.88rem;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* ============ 教程卡片 ============ */
    .tutorial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .tutorial-card {
      background: var(--surface);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .tutorial-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
    }

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

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

    .tutorial-card:hover .cover img {
      transform: scale(1.06);
    }

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

    .tutorial-tag {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 14px;
      align-self: flex-start;
    }

    .tutorial-body h3 {
      font-size: 1.1rem;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
    }

    .tutorial-body p {
      font-size: 0.9rem;
      color: var(--text-light);
      flex: 1;
    }

    .tutorial-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 18px;
      padding-top: 16px;
      border-top: 1px solid var(--border);
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* ============ 资源学习列表 ============ */
    .resource-list {
      background: var(--surface);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 16px 24px;
    }

    .resource-item {
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 18px 0;
      border-bottom: 1px solid var(--border);
    }

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

    .resource-num {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--primary);
      min-width: 40px;
    }

    .resource-info {
      flex: 1;
    }

    .resource-info h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .resource-info p {
      font-size: 0.88rem;
      color: var(--text-light);
    }

    .resource-badge {
      display: inline-block;
      background: var(--accent-light);
      color: #92400e;
      font-size: 0.78rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
      white-space: nowrap;
    }

    /* ============ FAQ ============ */
    .faq-section {
      background: var(--surface);
      border-top: 1px solid var(--border);
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      padding: 22px 26px;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow);
    }

    .faq-item summary {
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary i {
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .faq-item[open] summary i {
      transform: rotate(180deg);
    }

    .faq-item .faq-answer {
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px dashed var(--border);
      color: var(--text-light);
      font-size: 0.92rem;
      line-height: 1.7;
    }

    /* ============ CTA 板块 ============ */
    .cta-section {
      background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
      padding: 90px 0;
      text-align: center;
      color: #fff;
    }

    .cta-section h2 {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .cta-section p {
      font-size: 1.1rem;
      opacity: 0.85;
      max-width: 560px;
      margin: 0 auto 36px;
    }

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

    /* ============ 响应式 ============ */
    @media (max-width: 1024px) {
      .section {
        padding: 70px 0;
      }

      .value-grid {
        grid-template-columns: repeat(3, 1fr);
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .tutorial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .header-top .grid-x {
        gap: 12px;
      }

      .header-actions {
        width: 100%;
        justify-content: space-between;
      }

      .search-box {
        min-width: 0;
        flex: 1;
      }

      .page-hero {
        padding: 70px 0 60px;
      }

      .page-hero h1 {
        font-size: 2.2rem;
      }

      .page-hero .lead {
        font-size: 1.05rem;
      }

      .section-title {
        font-size: 1.65rem;
      }

      .value-grid,
      .tutorial-grid {
        grid-template-columns: 1fr;
      }

      .steps-grid {
        grid-template-columns: 1fr;
      }

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

      .footer-links {
        grid-template-columns: 1fr 1fr;
      }

      .cta-section h2 {
        font-size: 1.7rem;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 18px;
      }

      .brand-logo {
        font-size: 1.25rem;
      }

      .channel-tabs a {
        padding: 12px 16px;
        font-size: 0.88rem;
      }

      .search-box {
        display: none;
      }

      .page-hero h1 {
        font-size: 1.8rem;
      }

      .hero-actions {
        flex-direction: column;
        align-items: center;
      }

      .btn {
        width: 100%;
        max-width: 280px;
      }

      .resource-item {
        flex-wrap: wrap;
        gap: 10px;
      }

      .resource-badge {
        margin-left: 50px;
      }

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

    @media (max-width: 380px) {
      .brand-logo span {
        display: none;
      }
    }

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --green: #10b981;
  --green-light: #d1fae5;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --border: #e2e8f0;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow: 0 4px 20px rgba(0,0,0,0.07);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 22px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: var(--primary); transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style-position: inside; }
button, input, select, textarea { font: inherit; outline: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 24px; border-radius: 50px; border: 2px solid transparent;
  font-weight: 600; font-size: 0.92rem; cursor: pointer; line-height: 1.4;
  transition: var(--transition); text-align: center; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff !important; box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2); }
.btn-primary:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
.btn-ghost { background: transparent; color: var(--text) !important; border-color: var(--border); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary) !important; background: var(--primary-light); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff !important; box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3); }
.btn-accent:hover { background: #d97706; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35); }
.btn-sm { padding: 7px 18px; font-size: 0.85rem; }
.btn-lg { padding: 14px 36px; font-size: 1rem; }

/* ===== 标签 / 徽章 ===== */
.badge {
  display: inline-block; padding: 4px 14px; border-radius: 30px;
  font-size: 0.78rem; font-weight: 600; background: var(--primary-light); color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.15);
}
.badge-accent { background: var(--accent-light); color: #b45309; border-color: rgba(245, 158, 11, 0.2); }
.badge-green { background: var(--green-light); color: #047857; border-color: rgba(16, 185, 129, 0.2); }

/* ===== Header ===== */
.site-header {
  background: #fff; position: sticky; top: 0; z-index: 100;
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06), 0 4px 20px rgba(0,0,0,0.04);
}
.header-top { padding: 14px 0; border-bottom: 1px solid #f1f5f9; }
.brand-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.5rem; font-weight: 800; color: var(--text) !important; letter-spacing: -0.02em;
}
.brand-logo i { color: var(--primary); font-size: 1.3rem; }
.brand-logo span { color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.search-box {
  position: relative; display: flex; align-items: center;
  background: #f1f5f9; border-radius: 40px; padding: 2px 4px 2px 18px;
  border: 1px solid transparent; transition: var(--transition); width: 220px;
}
.search-box:focus-within { background: #fff; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1); }
.search-box input { border: none; background: transparent; font-size: 0.85rem; color: var(--text); width: 100%; padding: 7px 0; }
.search-box input::placeholder { color: #94a3b8; }
.search-box button {
  background: var(--primary); border: none; color: #fff; border-radius: 50%;
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: var(--transition); flex-shrink: 0;
}
.search-box button:hover { background: var(--primary-dark); }
.channel-nav { background: #fff; border-bottom: 1px solid #f1f5f9; }
.channel-tabs { display: flex; gap: 4px; padding: 8px 0; list-style: none; }
.channel-tabs li { margin: 0; }
.channel-tabs a {
  display: inline-block; padding: 8px 22px; border-radius: 30px;
  font-size: 0.9rem; font-weight: 600; color: var(--text-light); background: transparent;
  transition: var(--transition); position: relative;
}
.channel-tabs a:hover { color: var(--primary); background: var(--primary-light); }
.channel-tabs a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25); }

/* ===== 文章 Hero ===== */
.article-hero {
  position: relative; padding: 70px 0 90px; color: #fff;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center; background-attachment: fixed;
}
.article-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 41, 59, 0.72) 50%, rgba(37, 99, 235, 0.45) 100%);
}
.article-hero .container { position: relative; z-index: 1; }
.article-breadcrumb {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 0.85rem; color: rgba(255,255,255,0.8); margin-bottom: 20px;
}
.article-breadcrumb a { color: rgba(255,255,255,0.8); }
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb i { font-size: 0.7rem; opacity: 0.7; }
.article-hero-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; line-height: 1.3;
  max-width: 800px; margin-bottom: 18px; letter-spacing: -0.02em;
}
.article-hero-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; font-size: 0.85rem; color: rgba(255,255,255,0.85); }
.article-hero-meta .badge { background: rgba(255,255,255,0.18); color: #fff; border-color: rgba(255,255,255,0.25); backdrop-filter: blur(4px); }

/* ===== 正文主区 ===== */
.article-main { padding: 60px 0; }
.article-layout { display: flex; gap: 40px; }
.article-content-wrap { flex: 1; min-width: 0; }
.article-content-card {
  background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border);
  box-shadow: var(--shadow); padding: 40px;
}
.article-cover {
  width: 100%; border-radius: var(--radius); margin-bottom: 30px; object-fit: cover; max-height: 380px;
}
.article-content {
  font-size: 1rem; line-height: 2; color: var(--text);
}
.article-content h2 { font-size: 1.55rem; font-weight: 700; margin: 36px 0 16px; color: var(--text); line-height: 1.4; }
.article-content h3 { font-size: 1.25rem; font-weight: 700; margin: 30px 0 12px; color: var(--text); }
.article-content p { margin-bottom: 18px; }
.article-content ul, .article-content ol { margin: 0 0 18px 20px; list-style-position: outside; }
.article-content li { margin-bottom: 8px; }
.article-content blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-light);
  padding: 16px 22px; border-radius: 0 var(--radius) var(--radius) 0; margin: 24px 0;
  color: var(--text); font-style: normal;
}
.article-content img { border-radius: var(--radius); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-content a { color: var(--primary); border-bottom: 1px solid rgba(37, 99, 235, 0.3); }
.article-content a:hover { border-bottom-color: var(--primary); }
.article-content pre, .article-content code {
  background: #0f172a; color: #e2e8f0; border-radius: var(--radius-sm); font-size: 0.9rem;
}
.article-content pre { padding: 20px; overflow-x: auto; margin: 20px 0; }
.article-content code:not(pre code) { background: #f1f5f9; color: var(--primary-dark); padding: 2px 8px; border-radius: 6px; }
.article-content table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-content th, .article-content td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; }
.article-content th { background: #f8fafc; font-weight: 600; }

/* 文章标签 */
.article-tags { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.article-tags i { color: var(--text-lighter); }
.article-tags a {
  display: inline-block; padding: 5px 16px; background: #f8fafc; border: 1px solid var(--border);
  border-radius: 30px; font-size: 0.82rem; color: var(--text-light); transition: var(--transition);
}
.article-tags a:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }

/* 空状态 */
.article-empty {
  text-align: center; padding: 80px 40px;
}
.article-empty i { font-size: 3.5rem; color: var(--text-lighter); margin-bottom: 20px; }
.article-empty h2 { font-size: 1.8rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.article-empty p { color: var(--text-light); margin-bottom: 24px; }

/* ===== 侧边栏 ===== */
.article-sidebar { width: 340px; flex-shrink: 0; display: flex; flex-direction: column; gap: 24px; }
.sidebar-card {
  background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); padding: 28px; transition: var(--transition);
}
.sidebar-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.sidebar-card-title { display: flex; align-items: center; gap: 10px; font-size: 1rem; font-weight: 700; margin-bottom: 20px; color: var(--text); }
.sidebar-card-title i { color: var(--primary); }
.sidebar-list { list-style: none; }
.sidebar-list li { margin-bottom: 0; padding: 12px 0; border-bottom: 1px solid #f1f5f9; }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a { display: flex; align-items: flex-start; gap: 12px; color: var(--text); font-size: 0.88rem; line-height: 1.5; }
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .dot { color: var(--primary); font-size: 0.7rem; margin-top: 6px; flex-shrink: 0; }
.sidebar-cats { display: flex; flex-direction: column; gap: 12px; }
.sidebar-cat-item {
  display: flex; align-items: center; gap: 14px; padding: 14px 18px;
  background: #f8fafc; border: 1px solid var(--border); border-radius: var(--radius);
  transition: var(--transition); color: var(--text);
}
.sidebar-cat-item:hover { border-color: var(--primary); background: var(--primary-light); transform: translateX(4px); color: var(--primary); }
.sidebar-cat-item i { font-size: 1.1rem; color: var(--primary); }

/* ===== 相关推荐 ===== */
.related-section { padding: 70px 0; background: #fff; border-top: 1px solid var(--border); }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 36px; flex-wrap: wrap; gap: 16px; }
.section-head h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; color: var(--text); }
.section-head p { color: var(--text-light); font-size: 0.95rem; margin-top: 4px; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.related-card {
  background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border);
  overflow: hidden; transition: var(--transition); display: flex; flex-direction: column;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(37, 99, 235, 0.2); }
.related-card-img { height: 160px; overflow: hidden; position: relative; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-card-img img { transform: scale(1.06); }
.related-card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.related-card-body h3 { font-size: 0.95rem; font-weight: 600; line-height: 1.5; margin-bottom: 10px; flex: 1; }
.related-card-body h3 a { color: var(--text); }
.related-card-body h3 a:hover { color: var(--primary); }
.related-card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.78rem; color: var(--text-lighter); }

/* ===== FAQ ===== */
.faq-section { padding: 70px 0; background: var(--bg); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.faq-item {
  background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 26px; display: flex; gap: 16px; transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); border-color: rgba(37, 99, 235, 0.2); }
.faq-item i { color: var(--primary); font-size: 1.2rem; margin-top: 3px; flex-shrink: 0; }
.faq-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.faq-item p { font-size: 0.88rem; color: var(--text-light); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section {
  position: relative; padding: 80px 0; text-align: center; color: #fff;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(37, 99, 235, 0.82) 100%);
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 800; margin-bottom: 16px; }
.cta-section p { font-size: 1rem; max-width: 560px; margin: 0 auto 32px; opacity: 0.9; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-btns .btn-primary { background: #fff; color: var(--primary) !important; box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
.cta-btns .btn-primary:hover { background: #f8fafc; transform: translateY(-2px); }
.cta-btns .btn-ghost { border-color: rgba(255,255,255,0.6); color: #fff !important; }
.cta-btns .btn-ghost:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* ===== Footer ===== */
.site-footer { background: #0f172a; color: #94a3b8; padding: 60px 0 0; }
.footer-top { display: flex; justify-content: space-between; gap: 60px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); flex-wrap: wrap; }
.footer-brand { max-width: 340px; }
.footer-brand .brand-logo { color: #fff !important; }
.footer-brand .brand-logo span { color: #60a5fa; }
.footer-desc { margin-top: 16px; font-size: 0.88rem; line-height: 1.7; color: #64748b; }
.footer-links { display: flex; gap: 60px; }
.footer-links h5 { color: #e2e8f0; font-size: 0.95rem; font-weight: 600; margin-bottom: 18px; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { color: #94a3b8; font-size: 0.88rem; transition: var(--transition); }
.footer-links a:hover { color: #60a5fa; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 0.82rem; color: #475569; flex-wrap: wrap; gap: 8px; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-layout { flex-direction: column; }
  .article-sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1 1 300px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .header-actions .search-box { width: 160px; }
  .article-hero { padding: 50px 0 70px; }
  .article-content-card { padding: 24px; }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; gap: 40px; }
  .footer-links { gap: 40px; }
}
@media (max-width: 640px) {
  .channel-tabs { overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; padding-bottom: 4px; }
  .channel-tabs::-webkit-scrollbar { display: none; }
  .channel-tabs a { padding: 7px 16px; font-size: 0.85rem; white-space: nowrap; }
  .header-actions .search-box { display: none; }
  .header-actions .btn-sm { padding: 7px 14px; font-size: 0.82rem; }
  .article-hero-title { font-size: 1.5rem; }
  .related-grid { grid-template-columns: 1fr; }
  .article-tags { justify-content: center; }
  .footer-bottom { justify-content: center; text-align: center; }
  .footer-links { flex-direction: column; gap: 30px; }
}
@media (max-width: 520px) {
  .article-content-card { padding: 20px 16px; }
  .sidebar-card { flex: 1 1 100%; }
  .article-content-wrap { min-width: 0; }
  .section-head { flex-direction: column; align-items: flex-start; }
}

/* roulang page: category2 */
:root {
  --primary: #1d3a5f;
  --primary-light: #2a4d7a;
  --accent: #f76b2a;
  --accent-hover: #e45a1c;
  --bg: #f6f7fb;
  --bg-alt: #eef0f6;
  --bg-dark: #152a44;
  --text: #1c2b3a;
  --text-weak: #5d6b7e;
  --border: #dce1ea;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(20, 32, 50, 0.06);
  --shadow-md: 0 10px 32px rgba(20, 32, 50, 0.09);
  --shadow-lg: 0 24px 64px rgba(20, 32, 50, 0.12);
  --space-section: 88px;
  --transition: all 0.3s cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

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

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--border);
}

.header-top {
  padding: 14px 0;
  background: var(--white);
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.3px;
}

.brand-logo i {
  font-size: 1.4rem;
  color: var(--accent);
  background: rgba(247, 107, 42, 0.12);
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 4px 6px 4px 16px;
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(247, 107, 42, 0.12);
  background: var(--white);
}

.search-box input {
  border: none;
  background: transparent;
  width: 160px;
  font-size: 0.9rem;
  color: var(--text);
}

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

.search-box button {
  width: 34px;
  height: 34px;
  border: none;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.search-box button:hover {
  background: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.92rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(247, 107, 42, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(247, 107, 42, 0.35);
}

.btn-secondary {
  background: var(--primary);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  color: var(--white);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.btn-sm {
  padding: 7px 18px;
  font-size: 0.85rem;
}

.channel-nav {
  background: var(--white);
  border-top: 1px solid var(--border);
}

.channel-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.channel-tabs::-webkit-scrollbar {
  display: none;
}

.channel-tabs li {
  flex-shrink: 0;
  margin: 0;
}

.channel-tabs a {
  display: inline-flex;
  align-items: center;
  padding: 8px 26px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-weak);
  background: transparent;
  transition: var(--transition);
  border: 1px solid transparent;
}

.channel-tabs a:hover {
  color: var(--primary);
  background: var(--bg);
}

.channel-tabs a.active {
  color: var(--white);
  background: var(--primary);
  box-shadow: 0 4px 12px rgba(29, 58, 95, 0.25);
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  background-image: linear-gradient(180deg, rgba(21, 42, 68, 0.82), rgba(21, 42, 68, 0.92)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  padding: 88px 0 84px;
  color: var(--white);
  text-align: center;
}

.page-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 6px 18px;
  border-radius: 40px;
  font-size: 0.8rem;
  letter-spacing: 1px;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.page-hero .hero-badge i {
  color: var(--accent);
}

.page-hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

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

.page-hero .hero-subtitle {
  max-width: 640px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
}

.page-hero .hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ========== Section通用 ========== */
.section {
  padding: var(--space-section) 0;
}

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

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-head .section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  background: rgba(247, 107, 42, 0.1);
  padding: 5px 14px;
  border-radius: 30px;
  margin-bottom: 14px;
  text-transform: uppercase;
}

.section-head h2 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: -0.3px;
}

.section-head p {
  font-size: 0.98rem;
  color: var(--text-weak);
  line-height: 1.75;
}

.section-head.left {
  text-align: left;
  margin: 0 0 36px;
}

/* ========== Intro 图文 ========== */
.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

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

.intro-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}

.intro-media .media-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(4px);
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
}

.intro-media .media-badge i {
  font-size: 1.6rem;
  color: var(--accent);
}

.intro-media .media-badge strong {
  font-size: 1.05rem;
  color: var(--primary);
  display: block;
  line-height: 1.3;
}

.intro-media .media-badge span {
  font-size: 0.8rem;
  color: var(--text-weak);
}

.intro-content h2 {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 16px;
}

.intro-content > p {
  color: var(--text-weak);
  line-height: 1.85;
  margin-bottom: 24px;
}

.intro-list {
  display: grid;
  gap: 14px;
  margin-bottom: 28px;
}

.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.intro-list li:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateX(4px);
}

.intro-list li i {
  color: var(--accent);
  font-size: 1.15rem;
  margin-top: 3px;
}

.intro-list li strong {
  display: block;
  font-size: 0.95rem;
  color: var(--primary);
  margin-bottom: 2px;
}

.intro-list li span {
  font-size: 0.85rem;
  color: var(--text-weak);
}

/* ========== 指南卡片 ========== */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.guide-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.guide-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: darken(var(--border), 5%);
}

.guide-card .card-media {
  position: relative;
  height: 190px;
  overflow: hidden;
}

.guide-card .card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.guide-card:hover .card-media img {
  transform: scale(1.05);
}

.guide-card .card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(4px);
  padding: 4px 12px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
}

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

.guide-card .card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(247, 107, 42, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.guide-card .card-icon i {
  font-size: 1.1rem;
  color: var(--accent);
}

.guide-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.guide-card p {
  font-size: 0.88rem;
  color: var(--text-weak);
  line-height: 1.7;
  flex: 1;
}

.guide-card .card-link {
  margin-top: 18px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.guide-card .card-link:hover {
  gap: 10px;
  color: var(--accent-hover);
}

/* ========== 数据统计 ========== */
.stats-band {
  background: linear-gradient(135deg, var(--bg-dark), #1b3a5e);
  padding: 80px 0;
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.stats-band::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(247, 107, 42, 0.12);
}

.stats-band::after {
  content: '';
  position: absolute;
  bottom: -90px;
  left: -70px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 36px;
  position: relative;
  z-index: 1;
}

.stat-item {
  padding: 32px 16px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  backdrop-filter: blur(4px);
  transition: var(--transition);
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px);
}

.stat-item i {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 12px;
  display: inline-block;
}

.stat-num {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 6px;
  color: var(--white);
}

.stat-num small {
  font-size: 1.2rem;
  color: var(--accent);
  margin-left: 2px;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ========== 步骤流程 ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-item {
  position: relative;
  text-align: center;
  padding: 32px 18px 28px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

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

.step-item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(247, 107, 42, 0.3);
}

.step-item .step-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  background: rgba(29, 58, 95, 0.07);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-item .step-icon i {
  font-size: 1.3rem;
  color: var(--primary);
}

.step-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.82rem;
  color: var(--text-weak);
  line-height: 1.6;
}

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

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-item.open {
  box-shadow: var(--shadow-sm);
}

.faq-q {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--white);
  border: none;
  width: 100%;
  text-align: left;
  transition: var(--transition);
}

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

.faq-q i {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--text-weak);
  transition: var(--transition);
}

.faq-item.open .faq-q i {
  background: var(--accent);
  color: var(--white);
  transform: rotate(180deg);
}

.faq-a {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--text-weak);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.faq-item.open .faq-a {
  display: block;
}

/* ========== CTA ========== */
.cta-band {
  background-image: linear-gradient(120deg, rgba(29, 58, 95, 0.92), rgba(29, 58, 95, 0.8)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}

.cta-band h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-band p {
  max-width: 600px;
  margin: 0 auto 30px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.98rem;
  line-height: 1.75;
}

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

/* ========== Footer ========== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 20px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 20px;
}

.footer-brand .brand-logo {
  color: var(--white);
  margin-bottom: 16px;
}

.footer-brand .brand-logo i {
  background: rgba(247, 107, 42, 0.2);
  color: var(--accent);
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 360px;
}

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

.footer-links h5 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links ul {
  display: grid;
  gap: 8px;
}

.footer-links a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.35);
  padding-top: 8px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  :root {
    --space-section: 64px;
  }

  .guides-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .intro-grid {
    gap: 36px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .page-hero {
    padding: 64px 0;
  }

  .page-hero h1 {
    font-size: 2.1rem;
  }

  .page-hero .hero-subtitle {
    font-size: 0.95rem;
  }

  .section-head h2 {
    font-size: 1.7rem;
  }

  .intro-grid {
    grid-template-columns: 1fr;
  }

  .intro-media img {
    height: 280px;
  }

  .guides-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    grid-template-columns: 1fr 1fr;
  }

  .search-box input {
    width: 100px;
  }

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

@media (max-width: 520px) {
  :root {
    --space-section: 48px;
  }

  .container {
    padding: 0 14px;
  }

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

  .search-box {
    display: none;
  }

  .channel-tabs a {
    padding: 7px 18px;
    font-size: 0.82rem;
  }

  .page-hero h1 {
    font-size: 1.7rem;
  }

  .page-hero .hero-actions {
    flex-direction: column;
    align-items: center;
  }

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

  .stat-item {
    padding: 20px 12px;
  }

  .stat-num {
    font-size: 1.9rem;
  }

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

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

  .cta-band h2 {
    font-size: 1.5rem;
  }
}