/* roulang page: index */
:root {
  --brand: #177E9C;
  --brand-dark: #125F77;
  --brand-light: #E6F2F6;
  --accent: #F59E0B;
  --bg-body: #F6F8FB;
  --bg-card: #FFFFFF;
  --text-main: #0F172A;
  --text-secondary: #475569;
  --border-line: #E2E8F0;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 8px 24px rgba(15, 23, 42, 0.08);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
.container { max-width: 80rem; margin: 0 auto; padding-left: 1rem; padding-right: 1rem; }
@media (min-width: 640px) { .container { padding-left: 1.5rem; padding-right: 1.5rem; } }
@media (min-width: 1024px) { .container { padding-left: 2rem; padding-right: 2rem; } }
.section { padding-top: 3.5rem; padding-bottom: 3.5rem; }
@media (min-width: 768px) { .section { padding-top: 5rem; padding-bottom: 5rem; } }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--brand);
  color: #fff;
  font-weight: 600;
  border-radius: 0.5rem;
  padding: 0.75rem 1.75rem;
  min-height: 44px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.btn-primary:hover { background-color: var(--brand-dark); transform: translateY(-1px); }
.btn-primary:focus { outline: none; box-shadow: 0 0 0 3px rgba(23, 126, 156, 0.35); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: #fff;
  color: var(--brand);
  font-weight: 600;
  border-radius: 0.5rem;
  padding: 0.75rem 1.75rem;
  min-height: 44px;
  border: 1px solid var(--brand);
  transition: all 0.2s ease;
}
.btn-secondary:hover { background-color: var(--brand-light); color: var(--brand-dark); border-color: var(--brand-dark); transform: translateY(-1px); }
.btn-secondary:focus { outline: none; box-shadow: 0 0 0 3px rgba(23, 126, 156, 0.25); }
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: 0.5rem;
  padding: 0.75rem 1.75rem;
  min-height: 44px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}
.btn-accent:hover { background-color: #e67a00; transform: translateY(-1px); }
.btn-accent:focus { outline: none; box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.35); }
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-line);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
  height: 64px;
}
@media (min-width: 640px) { .nav-inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .nav-inner { padding: 0 2rem; } }
.nav-logo { display: flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.25rem; color: var(--text-main); }
.nav-logo i { color: var(--brand); font-size: 1.4rem; }
.nav-links { display: none; align-items: center; gap: 2rem; }
@media (min-width: 768px) { .nav-links { display: flex; } }
.nav-links a { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; padding: 0.35rem 0; border-bottom: 2px solid transparent; transition: color 0.2s, border-color 0.2s; }
.nav-links a:hover { color: var(--brand); border-bottom-color: var(--brand); }
.nav-links a.active { color: var(--brand-dark); border-bottom-color: var(--brand); font-weight: 600; }
.nav-cta { display: none; }
@media (min-width: 768px) { .nav-cta { display: flex; } }
.mobile-menu-btn { display: block; background: none; border: none; font-size: 1.4rem; color: var(--text-main); }
@media (min-width: 768px) { .mobile-menu-btn { display: none; } }
.mobile-menu { display: none; background: #fff; border-bottom: 1px solid var(--border-line); padding: 1rem; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 0.65rem 0.5rem; color: var(--text-secondary); font-weight: 500; border-bottom: 1px solid #f1f5f9; }
.mobile-menu a.active { color: var(--brand); }
.mobile-menu .mobile-cta { margin-top: 1rem; width: 100%; text-align: center; }
.card {
  background: var(--bg-card);
  border: 1px solid #EFF3F6;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.card:hover { border-color: #cbd5e1; box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--brand-light);
  color: var(--brand-dark);
}
.badge-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  background: #fef3c7;
  color: #92400e;
}
.img-placeholder { background: linear-gradient(135deg, #e2e8f0, #f1f5f9); display: flex; align-items: center; justify-content: center; min-height: 120px; border-radius: 1rem; }
.img-placeholder i { font-size: 2rem; color: #94a3b8; }
.img-cover { border-radius: 1rem; object-fit: cover; width: 100%; height: 100%; box-shadow: var(--shadow-card); }
.img-cover-lg { border-radius: 1.25rem; object-fit: cover; width: 100%; height: 100%; box-shadow: var(--shadow-hover); }
.section-title { font-size: 1.875rem; font-weight: 700; color: var(--text-main); line-height: 1.3; }
.section-subtitle { color: var(--text-secondary); font-size: 1rem; margin-top: 0.5rem; }
@media (min-width: 768px) { .section-title { font-size: 2.25rem; } }
.timeline-item { position: relative; padding-left: 2rem; padding-bottom: 2rem; }
.timeline-item:before { content: ''; position: absolute; left: 0.6rem; top: 0.2rem; bottom: 0; width: 2px; background: var(--brand-light); }
.timeline-item:last-child:before { bottom: auto; height: 2rem; }
.timeline-num {
  position: absolute; left: 0; top: 0.2rem; width: 1.375rem; height: 1.375rem;
  border-radius: 9999px; background: var(--brand); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700; z-index: 1;
}
.progress-track { background: rgba(255, 255, 255, 0.15); border-radius: 9999px; height: 0.625rem; overflow: hidden; }
.progress-fill { background: linear-gradient(90deg, var(--accent), #fbbf24); border-radius: 9999px; height: 100%; transition: width 0.6s ease; }
.faq-item { border: 1px solid var(--border-line); border-radius: 1rem; margin-bottom: 0.75rem; background: #fff; overflow: hidden; }
.faq-item details>summary { list-style: none; cursor: pointer; }
.faq-item details>summary::-webkit-details-marker { display: none; }
.faq-summary { display: flex; justify-content: space-between; align-items: center; padding: 1.1rem 1.25rem; font-weight: 600; color: var(--text-main); font-size: 0.95rem; }
.faq-summary .fa-chevron-down { transition: transform 0.3s; color: var(--brand); }
.faq-item details[open] .fa-chevron-down { transform: rotate(180deg); }
.faq-body { padding: 0 1.25rem 1.1rem; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.footer { background: var(--brand-dark); color: rgba(255, 255, 255, 0.85); }
.footer a { color: rgba(255, 255, 255, 0.7); transition: color 0.2s; }
.footer a:hover { color: var(--accent); }
.footer-links { display: grid; grid-template-columns: repeat(1, 1fr); gap: 2rem; }
@media (min-width: 640px) { .footer-links { grid-template-columns: repeat(3, 1fr); } }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 1.5rem; margin-top: 2rem; text-align: center; font-size: 0.85rem; color: rgba(255, 255, 255, 0.5); }
.hero {
  position: relative;
  background-image: linear-gradient(180deg, rgba(246, 248, 251, 0.92) 0%, rgba(246, 248, 251, 0.88) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
@media (min-width: 768px) {
  .hero { min-height: 560px; display: flex; align-items: center; }
}
.countdown-box {
  position: absolute; bottom: 1rem; left: 1rem;
  background: rgba(255, 255, 255, 0.95); border-radius: 1rem;
  padding: 0.65rem 1rem; display: flex; align-items: center; gap: 0.6rem;
  box-shadow: var(--shadow-hover); font-size: 0.8rem; font-weight: 600; color: var(--text-main);
}
.countdown-box i { color: var(--accent); }
.card-grid-2x2 { display: grid; grid-template-columns: repeat(1, 1fr); gap: 1rem; }
@media (min-width: 640px) { .card-grid-2x2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) {
  .grid-layout-3 { grid-template-columns: repeat(3, 1fr); }
}
.news-list-item {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.news-list-item .news-content { padding: 1rem 1.25rem; display: flex; flex-direction: column; flex: 1; }
.news-list-item .news-title { font-weight: 600; color: var(--text-main); font-size: 1.05rem; line-height: 1.4; margin-bottom: 0.4rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-list-item .news-summary { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.news-list-item .news-footer { display: flex; align-items: center; justify-content: space-between; margin-top: 0.75rem; font-size: 0.78rem; color: var(--text-secondary); }
.news-list-item .news-meta { display: flex; align-items: center; gap: 0.5rem; }
.news-list-item a.read-more { color: var(--brand); font-weight: 600; }
.news-list-item a.read-more:hover { color: var(--brand-dark); }
.news-list-item.no-image { border-top: 3px solid var(--brand); }

/* roulang page: article */
:root {
  --brand: #177E9C;
  --brand-dark: #125F77;
  --brand-light: #E6F2F6;
  --accent: #F59E0B;
  --accent-soft: #FFF6E5;
  --bg: #F6F8FB;
  --card: #FFFFFF;
  --text-main: #0F172A;
  --text-muted: #475569;
  --border: #E2E8F0;
  --border-soft: #EFF3F6;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --radius-md: 0.7rem;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --container: 80rem;
  --header-h: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  font-size: 15.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* ===== Header 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--border-soft);
  height: var(--header-h);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1rem;
  gap: 1rem;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--brand-dark);
  white-space: nowrap;
}

.brand-logo i {
  color: var(--accent);
  font-size: 1.15rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.4rem 0;
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--brand);
}

.nav-links a.active {
  color: var(--brand-dark);
  font-weight: 600;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--brand);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  border-radius: 0.55rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(23, 126, 156, 0.22);
  min-height: 44px;
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(23, 126, 156, 0.28);
}

.nav-cta i {
  font-size: 0.78rem;
}

/* 移动端汉堡 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--text-main);
  padding: 0.35rem 0.6rem;
  border-radius: 0.5rem;
  transition: background 0.2s ease;
}

.nav-toggle:hover {
  background: var(--bg);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-panel {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border-soft);
    padding: 1rem 1rem 1.5rem;
    display: none;
    flex-direction: column;
    gap: 0.6rem;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  }

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

  .nav-panel .nav-links {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }

  .nav-panel .nav-links a {
    display: block;
    width: 100%;
    padding: 0.55rem 0;
    border-bottom: 1px solid #f1f5f9;
  }

  .nav-panel .nav-cta {
    margin-top: 0.7rem;
    justify-content: center;
  }
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--border-soft);
  padding: 0.75rem 0;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.breadcrumb-bar a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.breadcrumb-bar .sep {
  margin: 0 0.5rem;
  color: #CBD5E1;
}

.breadcrumb-bar .current {
  color: var(--brand);
  font-weight: 500;
}

/* ===== 文章主体 ===== */
.article-shell {
  padding: 2.5rem 0 4rem;
}

.article-card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 2rem 1.5rem;
  max-width: 48rem;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .article-card {
    padding: 3rem 3.2rem;
  }
}

.article-category {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--brand-light);
  color: var(--brand-dark);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.28rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1.1rem;
}

.article-title {
  font-size: 1.9rem;
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

@media (min-width: 768px) {
  .article-title {
    font-size: 2.25rem;
    line-height: 1.3;
  }
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.85rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-bottom: 1.4rem;
  border-bottom: 1px solid var(--border-soft);
  margin-bottom: 1.8rem;
}

.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.article-meta i {
  color: var(--brand);
  font-size: 0.78rem;
  opacity: 0.75;
}

.article-content {
  font-size: 1.02rem;
  line-height: 1.9;
  color: #1E293B;
}

.article-content h2 {
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-main);
  margin: 2rem 0 0.85rem;
  padding-left: 0.85rem;
  border-left: 3px solid var(--brand);
}

.article-content h3 {
  font-size: 1.18rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-main);
  margin: 1.6rem 0 0.65rem;
}

.article-content p {
  margin-bottom: 1.05rem;
  text-align: justify;
}

.article-content ul,
.article-content ol {
  margin: 0.85rem 0 1.2rem;
  padding-left: 1.4rem;
}

.article-content ul {
  list-style: none;
}

.article-content ul li {
  position: relative;
  padding-left: 1.3rem;
  margin-bottom: 0.5rem;
}

.article-content ul li::before {
  content: "▸";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--brand);
  font-weight: 600;
}

.article-content ol li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--brand);
  background: var(--brand-light);
  padding: 1rem 1.2rem;
  border-radius: 0 0.6rem 0.6rem 0;
  margin: 1.3rem 0;
  color: var(--brand-dark);
  font-size: 0.98rem;
}

.article-content img {
  border-radius: 0.9rem;
  margin: 1.4rem 0;
  box-shadow: var(--shadow-sm);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.3rem 0;
  font-size: 0.92rem;
  border-radius: 0.6rem;
  overflow: hidden;
}

.article-content th {
  background: var(--brand-light);
  color: var(--brand-dark);
  text-align: left;
  padding: 0.65rem 0.85rem;
  font-weight: 600;
}

.article-content td {
  border-bottom: 1px solid var(--border-soft);
  padding: 0.6rem 0.85rem;
}

.article-content a {
  color: var(--brand);
  font-weight: 500;
  border-bottom: 1px dashed var(--brand);
}

/* ===== 内容未找到 ===== */
.not-found-box {
  text-align: center;
  padding: 3.5rem 1.5rem;
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-xl);
  max-width: 36rem;
  margin: 3rem auto;
}

.not-found-box i {
  font-size: 2.6rem;
  color: var(--brand);
  opacity: 0.55;
  margin-bottom: 1rem;
}

.not-found-box p {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 1.4rem;
}

.btn-back-home {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--brand);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  border-radius: 0.6rem;
  transition: all 0.2s ease;
}

.btn-back-home:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(23, 126, 156, 0.25);
}

/* ===== 相关推荐 ===== */
.related-section {
  max-width: 60rem;
  margin: 2.5rem auto 0;
}

.related-title {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.2rem;
}

.related-title i {
  color: var(--brand);
  font-size: 0.95rem;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

@media (min-width: 768px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.2s ease;
}

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

.related-card-img {
  width: 100%;
  height: 7.8rem;
  object-fit: cover;
  background: var(--brand-light);
}

.related-card-body {
  padding: 0.9rem 1.1rem 1.15rem;
}

.related-card-body h3 {
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text-main);
  margin-bottom: 0.35rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card-body p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.55rem;
}

.related-card-body .read-more {
  font-size: 0.82rem;
  color: var(--brand);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s ease;
}

.related-card-body .read-more:hover {
  color: var(--brand-dark);
}

.related-card-body .read-more i {
  font-size: 0.7rem;
}

/* ===== 返回列表 ===== */
.back-row {
  max-width: 60rem;
  margin: 2rem auto 0;
  text-align: center;
}

.btn-back-list {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: #fff;
  border: 1px solid var(--brand);
  color: var(--brand);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  border-radius: 0.6rem;
  transition: all 0.2s ease;
  min-height: 44px;
}

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

/* ===== Footer ===== */
.footer {
  background: #0B2531;
  color: rgba(255, 255, 255, 0.75);
}

.footer .container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.5rem 1rem 1.8rem;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .footer-links {
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
  }
}

.footer-links a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #FBBF24;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.4rem;
  text-align: center;
  font-size: 0.84rem;
  color: rgba(255, 255, 255, 0.5);
}

/* focus 可见性 */
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(23, 126, 156, 0.45);
  outline-offset: 2px;
}

/* ===== 文章页 CTA ===== */
.article-cta {
  background: var(--brand-light);
  border-radius: var(--radius-xl);
  padding: 1.8rem 1.5rem;
  text-align: center;
  margin-top: 2.5rem;
}

.article-cta h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--brand-dark);
  margin-bottom: 0.55rem;
}

.article-cta p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.1rem;
}

.article-cta .btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--brand);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.6rem;
  border-radius: 0.65rem;
  transition: all 0.2s ease;
  min-height: 44px;
}

.article-cta .btn-cta:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 14px rgba(23, 126, 156, 0.25);
}

/* roulang page: category1 */
:root {
    --bg: #F6F8FB;
    --card-bg: #FFFFFF;
    --text-main: #0F172A;
    --text-secondary: #475569;
    --border: #E2E8F0;
    --primary: #177E9C;
    --primary-dark: #125F77;
    --primary-light: #E6F2F6;
    --accent: #F59E0B;
    --radius-lg: 1rem;
    --radius-md: 0.75rem;
    --radius-sm: 0.5rem;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 18px rgba(15, 23, 42, 0.08);
    --transition: 200ms ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    color: inherit;
    text-decoration: none;
  }

  button {
    font-family: inherit;
    cursor: pointer;
  }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  @media (min-width: 640px) {
    .container {
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
  }

  @media (min-width: 1024px) {
    .container {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  .section-padding {
    padding: 4.5rem 0;
  }

  @media (min-width: 768px) {
    .section-padding {
      padding: 5.5rem 0;
    }
  }

  .section-tag {
    display: inline-flex;
    align-items: center;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    letter-spacing: 0.02em;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
  }

  .section-title {
    font-size: 1.7rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-main);
    letter-spacing: -0.01em;
  }

  @media (min-width: 768px) {
    .section-title {
      font-size: 2rem;
    }
  }

  .section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0.75rem;
  }

  /* 导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--border);
    height: 64px;
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 1rem;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-main);
    flex-shrink: 0;
  }

  .logo i {
    color: var(--accent);
    font-size: 1.4rem;
  }

  .nav-links {
    display: none;
    align-items: center;
    gap: 0.15rem;
  }

  @media (min-width: 768px) {
    .nav-links {
      display: flex;
    }
  }

  .nav-links a {
    padding: 0.45rem 0.95rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
    white-space: nowrap;
  }

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

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

  .header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
  }

  .header-cta {
    display: none;
  }

  @media (min-width: 768px) {
    .header-cta {
      display: inline-flex;
    }
  }

  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--text-main);
    width: 42px;
    height: 42px;
    border-radius: 0.5rem;
    transition: background var(--transition);
  }

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

  .mobile-toggle:hover {
    background: var(--bg);
  }

  .mobile-menu {
    display: none;
  }

  .mobile-menu.open {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding: 0.75rem 1.25rem 1.25rem;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
  }

  .mobile-menu a {
    padding: 0.7rem 0.9rem;
    border-radius: 0.6rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

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

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

  /* 按钮 */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: var(--primary);
    color: #fff;
    padding: 0.65rem 1.4rem;
    border-radius: 0.6rem;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    transition: all var(--transition);
    min-height: 44px;
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }

  .btn-primary:focus-visible {
    outline: 3px solid rgba(23, 126, 156, 0.35);
    outline-offset: 2px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: #fff;
    color: var(--primary);
    padding: 0.65rem 1.4rem;
    border-radius: 0.6rem;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--primary);
    transition: all var(--transition);
    min-height: 44px;
  }

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

  .btn-lg {
    padding: 0.9rem 2rem;
    font-size: 1.05rem;
  }

  .link-primary {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: gap var(--transition), color var(--transition);
  }

  .link-primary:hover {
    color: var(--primary-dark);
    gap: 0.6rem;
  }

  /* 页面 Hero */
  .page-hero {
    position: relative;
    padding: 4.5rem 0 4rem;
    background-image: linear-gradient(to bottom, rgba(246, 248, 251, 0.92), rgba(230, 242, 246, 0.88)), url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    border-bottom: 1px solid var(--border);
  }

  @media (min-width: 768px) {
    .page-hero {
      padding: 5.5rem 0 5rem;
    }
  }

  .page-hero .container {
    position: relative;
    z-index: 2;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    background: #fff;
    border: 1px solid var(--border);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.35rem 1rem;
    border-radius: 999px;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    gap: 0.4rem;
  }

  .hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
  }

  .page-hero h1 {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-main);
    letter-spacing: -0.01em;
    margin-bottom: 0.75rem;
  }

  @media (min-width: 768px) {
    .page-hero h1 {
      font-size: 2.8rem;
    }
  }

  .page-hero p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin-bottom: 1.75rem;
    line-height: 1.7;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    padding-top: 0.75rem;
  }

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

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

  .breadcrumb i {
    font-size: 0.65rem;
    color: #94A3B8;
  }

  .breadcrumb span {
    color: var(--primary);
    font-weight: 500;
  }

  /* 介绍区 */
  .intro-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    align-items: center;
  }

  @media (min-width: 992px) {
    .intro-grid {
      grid-template-columns: 1.1fr 1fr;
      gap: 4rem;
    }
  }

  .intro-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--primary-light);
  }

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

  .intro-content p {
    color: var(--text-secondary);
    margin-top: 1rem;
    font-size: 0.98rem;
    line-height: 1.8;
  }

  .intro-points {
    list-style: none;
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
  }

  .intro-points li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    color: var(--text-main);
    font-weight: 500;
  }

  .intro-points li i {
    color: var(--primary);
    font-size: 1.1rem;
  }

  /* 特色卡片 */
  .feature-card {
    background: var(--card-bg);
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
  }

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

  .feature-card-img {
    aspect-ratio: 16 / 9;
    background: var(--primary-light);
    overflow: hidden;
  }

  .feature-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 300ms ease;
  }

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

  .feature-card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .feature-card-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.4;
  }

  .feature-card-body p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.7;
    margin-bottom: 0.6rem;
  }

  .badge-primary {
    display: inline-flex;
    align-items: center;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.8rem;
    border-radius: 999px;
    align-self: flex-start;
  }

  /* 图标功能 */
  .icon-feature {
    display: flex;
    gap: 1.2rem;
    padding: 1.5rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
  }

  .icon-feature:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
  }

  .icon-feature-icon {
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    border-radius: 1rem;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
  }

  .icon-feature h4 {
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 0.3rem;
  }

  .icon-feature p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
  }

  /* 流程步骤 */
  .steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
  }

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

  @media (min-width: 1024px) {
    .steps-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  .step-item {
    position: relative;
    background: var(--card-bg);
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-lg);
    padding: 1.75rem 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
  }

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

  .step-num {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 1rem;
  }

  .step-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
  }

  .step-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
  }

  /* CTA 区 */
  .cta-box {
    position: relative;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 1.5rem;
    padding: 3rem 2rem;
    text-align: center;
    overflow: hidden;
    box-shadow: var(--shadow-md);
  }

  @media (min-width: 768px) {
    .cta-box {
      padding: 4rem 3rem;
    }
  }

  .cta-box::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 220px;
    height: 220px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
  }

  .cta-box::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: -40px;
    width: 140px;
    height: 140px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
  }

  .cta-box > * {
    position: relative;
    z-index: 2;
  }

  .cta-box h2 {
    color: #fff;
    font-size: 1.7rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.75rem;
  }

  @media (min-width: 768px) {
    .cta-box h2 {
      font-size: 2.1rem;
    }
  }

  .cta-box p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
    margin-bottom: 1.75rem;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

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

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

  .cta-box .btn-ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
  }

  .cta-box .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
  }

  /* FAQ */
  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition);
  }

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

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.4rem;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-main);
    transition: background var(--transition);
  }

  .faq-question:hover {
    background: var(--bg);
  }

  .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all var(--transition);
  }

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

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 280ms ease;
    padding: 0 1.4rem;
  }

  .faq-item.open .faq-answer {
    max-height: 240px;
    padding: 0 1.4rem 1.2rem;
  }

  .faq-answer p {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.75;
  }

  /* 页脚 */
  .footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
  }

  .footer-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  @media (min-width: 640px) {
    .footer-links {
      grid-template-columns: 1.4fr 1fr 1fr;
    }
  }

  .footer-links h3 {
    color: #fff;
    font-size: 0.95rem;
    margin-bottom: 1rem;
  }

  .footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
  }

  .footer-links li a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.88rem;
    transition: color var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
  }

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

  .footer-links li a i {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.3);
  }

  .footer-links li a:hover i {
    color: var(--accent);
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    margin-top: 2.5rem;
    padding-top: 1.4rem;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
  }

  /* 通用图片缺失占位 */
  .img-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 2rem;
    min-height: 180px;
  }

  /* 响应式调整 */
  @media (max-width: 520px) {
    .hero-actions .btn-primary,
    .hero-actions .btn-ghost {
      width: 100%;
    }

    .feature-card-body h3 {
      font-size: 1.05rem;
    }

    .cta-box h2 {
      font-size: 1.45rem;
    }

    .section-title {
      font-size: 1.5rem;
    }
  }

/* roulang page: category2 */
:root {
    --primary: #177E9C;
    --primary-dark: #125F77;
    --primary-light: #E6F2F6;
    --accent: #F59E0B;
    --bg: #F6F8FB;
    --card-bg: #FFFFFF;
    --text-main: #0F172A;
    --text-muted: #475569;
    --border: #E2E8F0;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-sm: 0.75rem;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    font-size: 16px;
  }

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

  a {
    text-decoration: none;
    color: inherit;
    transition: color .2s ease;
  }

  button {
    cursor: pointer;
    font-family: inherit;
  }

  input,
  textarea {
    font-family: inherit;
  }

  .container {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1rem;
  }

  @media (min-width: 640px) {
    .container {
      padding: 0 1.5rem;
    }
  }

  @media (min-width: 1024px) {
    .container {
      padding: 0 2rem;
    }
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--border);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    gap: 1.5rem;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    white-space: nowrap;
    min-width: 0;
  }

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

  .nav-links {
    display: none;
    align-items: center;
    gap: .25rem;
    flex: 1;
    margin-left: 1rem;
  }

  .nav-links a {
    padding: .45rem .9rem;
    border-radius: 999px;
    font-size: .9rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: background .2s ease, color .2s ease;
  }

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

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

  .header-cta {
    display: none;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 1.25rem;
    background: var(--primary);
    color: #fff;
    font-size: .9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    transition: background .2s ease;
    white-space: nowrap;
  }

  .header-cta:hover {
    background: var(--primary-dark);
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.2rem;
    border-radius: var(--radius-sm);
  }

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

  .mobile-menu {
    display: none;
    background: #fff;
    border-top: 1px solid var(--border);
    padding: .75rem 1rem 1.25rem;
    box-shadow: var(--shadow-md);
  }

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

  .mobile-menu a {
    display: block;
    padding: .8rem 1rem;
    border-radius: var(--radius-sm);
    font-size: .95rem;
    color: var(--text-main);
    font-weight: 500;
  }

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

  .mobile-menu a.btn-primary {
    margin-top: .6rem;
    text-align: center;
    color: #fff;
    background: var(--primary);
  }

  .mobile-menu a.btn-primary:hover {
    background: var(--primary-dark);
  }

  @media (min-width: 1024px) {
    .nav-links {
      display: flex;
    }
    .header-cta {
      display: inline-flex;
    }
    .nav-toggle {
      display: none;
    }
    .mobile-menu {
      display: none !important;
    }
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 1.6rem;
    background: var(--primary);
    color: #fff;
    font-size: .95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .btn-primary:focus,
  .btn-outline:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(23, 126, 156, 0.25);
  }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 1.6rem;
    background: #fff;
    color: var(--primary);
    font-size: .95rem;
    font-weight: 600;
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
  }

  .btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
  }

  .btn-lg {
    min-height: 52px;
    padding: 0 2.4rem;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
  }

  .cat-hero {
    background: linear-gradient(135deg, rgba(18, 95, 119, 0.88), rgba(23, 126, 156, 0.72)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    padding: 5rem 0 5.5rem;
    position: relative;
  }

  .cat-hero .badge {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    padding: .35rem 1rem;
    border-radius: 999px;
    font-size: .8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    backdrop-filter: blur(4px);
  }

  .cat-hero h1 {
    color: #fff;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 .75rem;
  }

  .cat-hero p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
    max-width: 40rem;
    margin: 0 0 1.5rem;
    line-height: 1.8;
  }

  @media (min-width: 768px) {
    .cat-hero h1 {
      font-size: 2.6rem;
    }
    .cat-hero p {
      font-size: 1.1rem;
    }
  }

  .stats-section {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 2.5rem 0;
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    text-align: center;
  }

  .stat-num {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
  }

  .stat-label {
    font-size: .85rem;
    color: var(--text-muted);
    margin-top: .25rem;
  }

  @media (max-width: 520px) {
    .stat-num {
      font-size: 1.6rem;
    }
  }

  .section-head {
    text-align: center;
    max-width: 42rem;
    margin: 0 auto 2.5rem;
  }

  .section-head h2 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 .5rem;
  }

  .section-head p {
    color: var(--text-muted);
    font-size: .95rem;
    margin: 0;
    line-height: 1.7;
  }

  @media (min-width: 768px) {
    .section-head h2 {
      font-size: 2.1rem;
    }
  }

  .card {
    background: var(--card-bg);
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
  }

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

  @media (min-width: 768px) {
    .card {
      padding: 2rem;
    }
  }

  .feature-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .feature-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    background: var(--primary-light);
  }

  .feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 .35rem;
  }

  .feature-card p {
    color: var(--text-muted);
    font-size: .9rem;
    margin: 0;
    line-height: 1.7;
  }

  .feature-card .icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 1.2rem;
    border-radius: var(--radius-lg);
    margin-bottom: .5rem;
  }

  @media (min-width: 768px) {
    .feature-card.md-feature {
      flex-direction: row;
      align-items: center;
    }
    .feature-card.md-feature img {
      width: 40%;
      height: 100%;
      min-height: 220px;
    }
  }

  .text-icon-block {
    display: flex;
    gap: 1rem;
    background: #fff;
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s ease, transform .2s ease;
  }

  .text-icon-block:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .text-icon-block i {
    font-size: 1.4rem;
    color: var(--primary);
    flex-shrink: 0;
    margin-top: .15rem;
  }

  .text-icon-block h4 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 .3rem;
  }

  .text-icon-block p {
    font-size: .88rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
  }

  .reward-tier-section {
    background: var(--primary-light);
  }

  .tier-card {
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
    padding: 1.8rem 1.5rem;
    position: relative;
    transition: box-shadow .2s ease, transform .2s ease;
  }

  .tier-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
  }

  .tier-card.featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, #FFFDF7, #fff);
  }

  .tier-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: .25rem .9rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
    margin-bottom: 1rem;
  }

  .tier-card.featured .tier-tag {
    background: #FEF3C7;
    color: #B45309;
  }

  .tier-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 0 0 .75rem;
  }

  .tier-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
    color: var(--text-muted);
    font-size: .88rem;
    line-height: 1.8;
  }

  .tier-card ul li {
    padding-left: 1.3rem;
    position: relative;
  }

  .tier-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
  }

  .steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    counter-reset: step;
  }

  @media (min-width: 768px) {
    .steps-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 1024px) {
    .steps-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  .step-item {
    background: #fff;
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: 1.6rem 1.4rem;
    position: relative;
    transition: box-shadow .2s ease, transform .2s ease;
  }

  .step-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
  }

  .step-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    margin-bottom: 1rem;
  }

  .step-item h3 {
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 .4rem;
  }

  .step-item p {
    font-size: .85rem;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.65;
  }

  .faq-list {
    max-width: 48rem;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: .85rem;
  }

  .faq-item {
    background: #fff;
    border: 1px solid #EFF3F6;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: box-shadow .2s ease;
  }

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

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1.1rem 1.3rem;
    background: transparent;
    border: none;
    text-align: left;
    font-size: .95rem;
    font-weight: 600;
    color: var(--text-main);
    gap: 1rem;
  }

  .faq-question i {
    font-size: .9rem;
    color: var(--text-muted);
    transition: transform .2s ease;
    flex-shrink: 0;
  }

  .faq-item.open .faq-question i {
    transform: rotate(45deg);
    color: var(--primary);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease, padding .2s ease;
  }

  .faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 1.3rem 1.2rem;
  }

  .faq-answer p {
    margin: 0;
    font-size: .9rem;
    color: var(--text-muted);
    line-height: 1.7;
  }

  .cta-block {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius-xl);
    padding: 3rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
  }

  .cta-block h2 {
    color: #fff;
    font-size: 1.7rem;
    font-weight: 700;
    margin: 0 0 .6rem;
  }

  .cta-block p {
    color: rgba(255, 255, 255, 0.85);
    font-size: .95rem;
    margin: 0 0 1.6rem;
  }

  .cta-block .btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  }

  .cta-block .btn-primary:hover {
    background: #D97706;
  }

  @media (min-width: 768px) {
    .cta-block {
      padding: 4rem 2.5rem;
    }
    .cta-block h2 {
      font-size: 2.2rem;
    }
  }

  .footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.7);
  }

  .footer-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  @media (min-width: 768px) {
    .footer-links {
      grid-template-columns: 1.5fr 1fr 1fr;
    }
  }

  .footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color .2s ease;
  }

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

  .footer-bottom {
    padding-top: 1.5rem;
    text-align: center;
    font-size: .82rem;
    color: rgba(255, 255, 255, 0.45);
  }

  .img-fallback {
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    color: var(--primary);
    font-size: 1.4rem;
    border-radius: var(--radius-lg);
  }

  .incentive-note {
    background: #fff;
    border-left: 4px solid var(--accent);
    padding: 1.2rem 1.4rem;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
    box-shadow: var(--shadow-sm);
    margin-top: 2rem;
  }

  .incentive-note p {
    margin: 0;
    font-size: .9rem;
    color: var(--text-muted);
    line-height: 1.7;
  }

  @media (max-width: 520px) {
    .cta-block .btn-lg {
      width: 100%;
    }
    .header-cta {
      display: none;
    }
  }