/* roulang page: index */
:root {
  --primary: #1D6FE0;
  --primary-dark: #155EBC;
  --primary-light: #E8F1FE;
  --success: #10B981;
  --warning: #F79009;
  --bg-body: #F6F8FB;
  --bg-card: #FFFFFF;
  --text-title: #0F172A;
  --text-body: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --shadow-card: 0 1px 2px rgba(15,23,42,.04), 0 1px 3px rgba(15,23,42,.06);
  --shadow-hover: 0 8px 24px rgba(29,111,224,.10);
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: all .2s ease;
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input { font-family: inherit; }

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

/* ============ 按钮 ============ */
.btn-primary {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 26px; border-radius: 8px;
  background: var(--primary); color: #fff; font-weight: 600; font-size: 15px;
  transition: var(--transition); cursor: pointer; border: none;
  gap: 8px; white-space: nowrap;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(29,111,224,.22);
}
.btn-primary:active { transform: scale(.98); }
.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}

.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 26px; border-radius: 8px;
  background: #fff; color: var(--primary); font-weight: 600; font-size: 15px;
  border: 1px solid #CBD5E1; transition: var(--transition); cursor: pointer;
  gap: 8px; white-space: nowrap;
}
.btn-secondary:hover {
  background: var(--primary-light); border-color: var(--primary);
}
.btn-secondary:active { transform: scale(.98); }
.btn-secondary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}

/* ============ 左侧导航 ============ */
.sidebar {
  width: 260px; flex-shrink: 0;
}
.sidebar-inner {
  position: sticky; top: 0; height: 100vh;
  background: #fff; border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.nav-item {
  display: flex; align-items: center; gap: 12px;
  height: 44px; padding: 0 16px; border-radius: 10px;
  color: var(--text-body); font-size: 14px; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav-item:hover { background: #F0F7FF; color: var(--primary); }
.nav-item.active {
  background: var(--primary-light); color: var(--primary); font-weight: 600;
}
.nav-item.active::before {
  content: ''; position: absolute; left: 0; top: 10px; bottom: 10px;
  width: 3px; border-radius: 3px; background: var(--primary);
}

/* ============ 移动端顶部导航 ============ */
.mobile-header {
  position: sticky; top: 0; z-index: 40;
  background: #fff; border-bottom: 1px solid var(--border);
}
.mobile-menu-link {
  display: block; padding: 10px 16px; border-radius: 8px;
  color: var(--text-body); font-weight: 500; font-size: 15px;
  transition: var(--transition);
}
.mobile-menu-link:hover { background: #F0F7FF; color: var(--primary); }
.mobile-menu-link.active {
  background: var(--primary-light); color: var(--primary); font-weight: 600;
}

/* ============ 通用卡片 ============ */
.card {
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.card-hover:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

/* ============ 徽章 / 标签 ============ */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 500; line-height: 1.4;
}
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-orange { background: #FEF3C7; color: #B45309; }
.badge-green { background: #D1FAE5; color: #047857; }

/* ============ 板块标题 ============ */
.section { margin-bottom: 72px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; letter-spacing: .1em;
  color: var(--primary); margin-bottom: 12px;
}
.section-tag::before {
  content: ''; width: 24px; height: 2px; background: var(--primary); border-radius: 2px;
}
.section-title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600; color: var(--text-title);
  letter-spacing: -0.01em;
  line-height: 1.3;
}
.section-desc {
  margin-top: 10px; font-size: 15px; color: var(--text-body);
  max-width: 640px; line-height: 1.7;
}

/* ============ 权益对比表格 ============ */
.compare-table { width: 100%; border-collapse: collapse; min-width: 560px; }
.compare-table th,
.compare-table td {
  padding: 16px 20px; text-align: center;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.compare-table th { font-weight: 600; color: var(--text-title); background: #F8FAFC; }
.compare-table td { color: var(--text-body); }
.compare-table td:first-child { text-align: left; font-weight: 500; color: var(--text-title); }
.compare-table th.recommended {
  background: var(--primary-light); color: var(--primary);
  border-top: 3px solid var(--primary);
  position: relative;
}
.compare-table .highlight-row td {
  background: #F0F7FF; font-weight: 600; color: var(--text-title);
}
.icon-check { color: var(--success); font-weight: 700; font-size: 16px; }
.icon-times { color: #CBD5E1; font-weight: 700; font-size: 16px; }

/* ============ 会员等级台阶 ============ */
.tier-grid {
  display: grid; gap: 28px; position: relative;
}
.tier-grid::before {
  content: ''; position: absolute;
  left: 15px; top: 0; bottom: 0;
  width: 2px; background: var(--primary-light); border-radius: 2px;
}
.tier-row {
  position: relative; display: flex; align-items: flex-start; gap: 16px;
  padding-left: 44px;
}
.tier-dot {
  position: absolute; left: 0; top: 20px;
  width: 32px; height: 32px; border-radius: 50%;
  background: #fff; border: 2px solid var(--primary);
  z-index: 2; display: flex; align-items: center; justify-content: center;
  font-size: 12px; color: var(--primary); font-weight: 700;
}
.tier-row.orange .tier-dot {
  border-color: var(--warning); background: var(--warning); color: #fff;
}
.tier-row.green .tier-dot {
  border-color: var(--success); background: var(--success); color: #fff;
}
.tier-card {
  background: #fff; border: 1px solid var(--border);
  border-radius: 12px; padding: 24px;
  box-shadow: var(--shadow-card);
  flex: 1; transition: var(--transition);
}
.tier-card:hover { box-shadow: var(--shadow-hover); }

@media (min-width: 1024px) {
  .tier-grid { padding-top: 8px; }
  .tier-row { width: 50%; padding-left: 0; }
  .tier-row:nth-child(odd) {
    justify-self: start;
    padding-right: 48px;
  }
  .tier-row:nth-child(even) {
    justify-self: end;
    padding-left: 48px;
  }
  .tier-row:nth-child(odd) .tier-dot {
    left: auto; right: -16px; top: 24px;
  }
  .tier-row:nth-child(even) .tier-dot {
    left: -16px; top: 24px;
  }
}

/* ============ 最新信息列表 ============ */
.news-list { display: flex; flex-direction: column; }
.news-item {
  display: flex; align-items: center; gap: 16px;
  padding: 16px 20px; border-radius: 12px;
  border: 1px solid transparent;
  transition: var(--transition);
  border-bottom: 1px solid var(--border);
}
.news-item:hover {
  background: #F0F7FF;
  border-color: var(--primary-light);
}
.news-item:hover .news-arrow {
  transform: translateX(4px); color: var(--primary);
}
.news-badge {
  flex-shrink: 0; min-width: 84px; text-align: center;
  padding: 3px 10px; border-radius: 999px;
  background: var(--primary-light); color: var(--primary);
  font-size: 12px; font-weight: 500;
}
.news-title {
  flex: 1; font-size: 15px; font-weight: 500; color: var(--text-title);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.news-summary {
  flex: 1.4; font-size: 13px; color: var(--text-muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; line-height: 1.5;
}
.news-time {
  flex-shrink: 0; font-size: 12px; color: var(--text-muted);
  display: flex; align-items: center; gap: 6px;
}
.news-arrow {
  color: var(--text-muted); font-size: 14px; transition: var(--transition);
}
@media (max-width: 768px) {
  .news-item { flex-wrap: wrap; gap: 8px 12px; }
  .news-badge { min-width: auto; }
  .news-title { flex: 1 1 100%; white-space: normal; }
  .news-summary { flex: 1 1 100%; }
  .news-time { margin-left: auto; }
}

/* ============ FAQ 手风琴 ============ */
.faq-item {
  background: #fff; border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 10px;
  overflow: hidden; transition: var(--transition);
}
.faq-item.open { border-color: var(--primary-light); box-shadow: var(--shadow-card); }
.faq-btn {
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; padding: 20px 24px;
  font-size: 16px; font-weight: 600; color: var(--text-title);
  text-align: left; transition: var(--transition);
}
.faq-btn:hover { color: var(--primary); }
.faq-item.open .faq-btn { color: var(--primary); }
.faq-icon {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  font-size: 16px; font-weight: 400;
  display: flex; align-items: center; justify-content: center;
  transition: transform .3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.open .faq-answer { max-height: 320px; }
.faq-answer-inner {
  padding: 0 24px 20px; color: var(--text-body); font-size: 15px; line-height: 1.75;
}

/* ============ CTA 表单 ============ */
.cta-box {
  background: linear-gradient(135deg, #F0F7FF 0%, #FFFFFF 60%);
  border: 1px solid var(--primary-light);
  border-radius: 16px;
  padding: 44px;
}
.cta-input {
  width: 100%; height: 48px; padding: 0 16px;
  border: 1px solid #CBD5E1; border-radius: 8px;
  font-size: 15px; background: #fff; color: var(--text-title);
  transition: var(--transition); outline: none;
}
.cta-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-light);
}
.cta-input::placeholder { color: var(--text-muted); }

/* ============ 页脚 ============ */
.footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 56px 0 32px;
  margin-top: 40px;
}
.footer-link {
  color: var(--text-body); font-size: 14px;
  transition: var(--transition);
}
.footer-link:hover { color: var(--primary); }

/* ============ 专属内容卡片 ============ */
.cover-card {
  border-radius: 12px; overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow-card); transition: var(--transition);
  background: #fff;
}
.cover-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }

/* ============ 响应式间距 ============ */
.main-space { padding: 40px 24px 0; }
@media (min-width: 768px) { .main-space { padding: 48px 32px 0; } }
@media (min-width: 1024px) { .main-space { padding: 48px 40px 0; } }

/* ============ 无障碍 ============ */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* roulang page: article */
:root {
  --primary: #1D6FE0;
  --primary-dark: #155EBC;
  --primary-light: #E8F1FE;
  --emerald: #10B981;
  --amber: #F79009;
  --bg: #F6F8FB;
  --title: #0F172A;
  --body: #475569;
  --muted: #94A3B8;
  --line: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 8px 24px rgba(29, 111, 224, 0.10);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; outline: none; }

.sidebar-nav {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 260px;
  background: #fff;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 50;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  height: 44px;
  border-radius: 10px;
  color: var(--body);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
}
.nav-item:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.nav-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: 3px;
  background: var(--primary);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  padding: 10px 20px;
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: scale(0.98);
}
.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--primary);
  border: 1px solid #CBD5E1;
  border-radius: 8px;
  padding: 10px 20px;
  font-weight: 600;
  transition: all 0.2s ease;
  cursor: pointer;
}
.btn-secondary:hover {
  background: var(--primary-light);
  border-color: var(--primary);
}
.btn-secondary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--body);
}
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--title);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.4;
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--title);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.5;
}
.article-content p {
  margin-bottom: 1.25rem;
}
.article-content img {
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  margin: 1.75rem 0;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  margin: 1.5rem 0;
  color: var(--title);
  font-weight: 500;
}
.article-content ul, .article-content ol {
  margin: 1rem 0 1.5rem 1.5rem;
}
.article-content ul li {
  list-style: disc;
  margin-bottom: 0.5rem;
}
.article-content ol li {
  list-style: decimal;
  margin-bottom: 0.5rem;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--primary-dark);
}
.article-content code {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.mobile-menu {
  display: none;
}
@media (max-width: 1023px) {
  .sidebar-nav {
    display: none;
  }
  .mobile-menu {
    display: block;
  }
  .main-content {
    margin-left: 0 !important;
  }
}
.footer-link {
  color: var(--body);
  font-size: 14px;
  transition: color 0.2s ease;
}
.footer-link:hover {
  color: var(--primary);
}

.focus-ring:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--primary-light);
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1D6FE0;
            --primary-dark: #155EBC;
            --primary-light: #E8F1FE;
            --success: #10B981;
            --warning: #F79009;
            --bg: #F6F8FB;
            --white: #FFFFFF;
            --title: #0F172A;
            --body: #475569;
            --muted: #94A3B8;
            --border: #E2E8F0;
            --radius-lg: 8px;
            --radius-xl: 12px;
            --radius-2xl: 16px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 24px rgba(29, 111, 224, 0.10);
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--body);
            line-height: 1.75;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
        }
        img {
            display: block;
            max-width: 100%;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input {
            font-family: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-page {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (min-width: 768px) {
            .container-page {
                padding-left: 32px;
                padding-right: 32px;
            }
        }
        @media (min-width: 1024px) {
            .container-page {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ===== 左侧竖向导航 ===== */
        .sidebar {
            width: 260px;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--white);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 60;
            padding: 0;
        }
        .sidebar .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 64px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border);
        }
        .brand-logo {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .brand-text {
            line-height: 1.2;
        }
        .brand-name {
            font-weight: 700;
            font-size: 16px;
            color: var(--title);
        }
        .brand-sub {
            font-size: 12px;
            color: var(--muted);
        }
        .sidebar nav {
            flex: 1;
            padding: 16px 12px;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 44px;
            padding: 0 16px;
            border-radius: 10px;
            color: var(--body);
            font-size: 14px;
            font-weight: 500;
            transition: background .2s, color .2s, box-shadow .2s;
            position: relative;
        }
        .nav-item:hover {
            background: #F1F5F9;
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-item.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            border-radius: 0 4px 4px 0;
            background: var(--primary);
        }
        .sidebar-cta {
            margin: 16px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 10px;
            transition: background .2s, transform .15s, box-shadow .2s;
            box-shadow: 0 1px 2px rgba(29, 111, 224, 0.2);
        }
        .sidebar-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(29, 111, 224, 0.25);
        }
        .sidebar-cta:active {
            transform: scale(0.98);
        }
        .sidebar-cta:focus-visible {
            outline: 4px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 50;
            height: 64px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }
        .mobile-header .brand {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .brand-logo {
            width: 32px;
            height: 32px;
            border-radius: 8px;
        }
        .mobile-header .brand-name {
            font-size: 15px;
        }
        .mobile-header .brand-sub {
            font-size: 11px;
        }
        .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: 8px;
            transition: background .2s;
        }
        .hamburger:hover {
            background: #F1F5F9;
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--title);
            transition: transform .25s, opacity .25s;
        }
        .hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--white);
            box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
            padding: 12px;
            z-index: 55;
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .nav-item {
            height: 48px;
        }
        .mobile-menu-btn {
            margin-top: 8px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-weight: 600;
            font-size: 14px;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
        }

        /* ===== 通用区块 ===== */
        .section {
            padding: 56px 24px;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            color: var(--title);
            line-height: 1.3;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .section-header p {
            color: var(--muted);
            font-size: 15px;
            max-width: 640px;
            line-height: 1.7;
        }
        @media (min-width: 1024px) {
            .section {
                padding: 80px 40px;
            }
            .section-header {
                margin-bottom: 44px;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 8px;
            transition: background .2s, transform .15s, box-shadow .2s;
            box-shadow: 0 1px 2px rgba(29, 111, 224, 0.2);
            border: none;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(29, 111, 224, 0.25);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: 4px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            background: var(--white);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border-radius: 8px;
            border: 1px solid #CBD5E1;
            transition: background .2s, border .2s, transform .15s;
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 4px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Hero区 ===== */
        .category-hero {
            position: relative;
            padding: 80px 24px 72px;
            overflow: hidden;
            background: linear-gradient(135deg, #fff 0%, #EFF6FF 100%);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.55) 60%, rgba(255, 255, 255, 0.2) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }
        .hero-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 24px;
            letter-spacing: normal;
        }
        .hero-content h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 700;
            color: var(--title);
            line-height: 1.15;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .hero-content p {
            font-size: 16px;
            color: var(--body);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        @media (min-width: 1024px) {
            .category-hero {
                padding: 100px 40px 88px;
            }
        }
        @media (max-width: 640px) {
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
            }
        }

        /* ===== 精选区块 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .feature-card-large {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            border: 1px solid var(--border);
            background: var(--white);
        }
        .feature-card-large:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .feature-card-large img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .feature-card-large::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0) 30%, rgba(15, 23, 42, 0.55) 100%);
            z-index: 1;
        }
        .feature-card-large .card-content {
            position: relative;
            z-index: 2;
            padding: 28px;
            color: #fff;
        }
        .feature-card-large .card-content .badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .feature-card-large .card-content h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .feature-card-large .card-content p {
            font-size: 14px;
            opacity: 0.92;
            line-height: 1.6;
            margin: 0;
        }
        .feature-card-small {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 16px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
        }
        .feature-card-small:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .feature-card-small img {
            width: 96px;
            height: 72px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
            transition: transform .3s;
        }
        .feature-card-small:hover img {
            transform: scale(1.05);
        }
        .feature-card-small .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 11px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 6px;
        }
        .feature-card-small h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--title);
            line-height: 1.4;
            margin-bottom: 2px;
        }
        .feature-card-small p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.5;
            margin: 0;
        }
        @media (min-width: 768px) {
            .feature-grid {
                grid-template-columns: 2fr 1fr;
                grid-template-rows: auto auto;
            }
            .feature-card-large {
                grid-row: span 2;
                min-height: 440px;
            }
            .feature-card-small {
                min-height: 100px;
            }
        }

        /* ===== 数据概览 ===== */
        .stats-section {
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
            max-width: 900px;
            margin: 0 auto;
        }
        .stat-item {
            text-align: center;
        }
        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--title);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .stat-label {
            font-size: 14px;
            color: var(--muted);
            margin-top: 6px;
        }
        @media (min-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .stat-number {
                font-size: 42px;
            }
        }

        /* ===== 等级阶梯 ===== */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            padding: 20px 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: #DCE7F7;
        }
        .timeline-item {
            position: relative;
            padding-left: 52px;
            margin-bottom: 40px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: 10px;
            top: 22px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--dot-color, var(--primary));
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--dot-color, var(--primary));
            z-index: 1;
        }
        .timeline-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-hover);
        }
        .timeline-card.highlight {
            border-color: var(--primary);
            background: linear-gradient(135deg, #fff 0%, #F0F7FF 100%);
        }
        .timeline-card .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .timeline-card .badge-warning {
            background: #FEF3C7;
            color: var(--warning);
        }
        .timeline-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 14px;
        }
        .timeline-card ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .timeline-card ul li {
            position: relative;
            padding-left: 22px;
            font-size: 14px;
            color: var(--body);
            line-height: 1.6;
        }
        .timeline-card ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--success);
            font-weight: 700;
        }
        @media (min-width: 768px) {
            .timeline::before {
                left: 50%;
                transform: translateX(-50%);
            }
            .timeline-item {
                width: 50%;
                padding-left: 0;
            }
            .timeline-item:nth-child(odd) {
                padding-right: 48px;
                text-align: right;
            }
            .timeline-item:nth-child(even) {
                margin-left: 50%;
                padding-left: 48px;
                text-align: left;
            }
            .timeline-dot {
                left: auto;
                right: -7px;
            }
            .timeline-item:nth-child(even) .timeline-dot {
                left: -7px;
                right: auto;
            }
            .timeline-card ul li {
                text-align: left;
            }
            .timeline-item:nth-child(odd) .timeline-dot {
                right: -7px;
            }
        }

        /* ===== 图文介绍区 ===== */
        .intro-section {
            position: relative;
            overflow: hidden;
            border-radius: 0;
            background: var(--white);
        }
        .intro-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }
        .intro-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, 0.78) 0%, rgba(15, 23, 42, 0.45) 100%);
            z-index: 1;
        }
        .intro-content {
            position: relative;
            z-index: 2;
            max-width: 560px;
            color: #fff;
            padding: 64px 24px;
        }
        .intro-content h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .intro-content p {
            font-size: 15px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
        }
        .intro-content .btn-primary {
            background: #fff;
            color: var(--primary);
        }
        .intro-content .btn-primary:hover {
            background: var(--primary-light);
        }
        @media (min-width: 1024px) {
            .intro-content {
                padding: 100px 40px;
            }
        }

        /* ===== 专属内容预览 ===== */
        .preview-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .preview-large {
            position: relative;
            border-radius: var(--radius-2xl);
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: box-shadow .3s, transform .3s;
        }
        .preview-large:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .preview-large img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .preview-large .preview-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0) 40%, rgba(15, 23, 42, 0.6) 100%);
        }
        .preview-large .badge-badge-warning {
            position: absolute;
            top: 20px;
            right: 20px;
            z-index: 3;
            background: var(--warning);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(247, 144, 9, 0.3);
        }
        .preview-info {
            position: relative;
            z-index: 2;
            padding: 28px;
            color: #fff;
        }
        .preview-info h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .preview-info p {
            font-size: 14px;
            opacity: 0.9;
            line-height: 1.6;
            margin: 0;
        }
        .preview-col {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .preview-small {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 14px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
        }
        .preview-small:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .preview-small img {
            width: 96px;
            height: 68px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
            transition: transform .3s;
        }
        .preview-small:hover img {
            transform: scale(1.05);
        }
        .preview-small h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--title);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .preview-small p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.5;
            margin: 0;
        }
        @media (min-width: 768px) {
            .preview-grid {
                grid-template-columns: 2fr 1fr;
            }
            .preview-large {
                min-height: 420px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            overflow: hidden;
            transition: box-shadow .3s, border-color .3s;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            border-left: 3px solid var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--title);
            text-align: left;
            transition: color .2s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 12px;
            height: 2px;
            background: var(--muted);
            border-radius: 2px;
            transform: translate(-50%, -50%);
            transition: transform .25s, background .25s;
        }
        .faq-icon::after {
            transform: translate(-50%, -50%) rotate(90deg);
        }
        .faq-item.active .faq-icon::before {
            background: var(--primary);
        }
        .faq-item.active .faq-icon::after {
            transform: translate(-50%, -50%) rotate(0deg);
            background: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--body);
            line-height: 1.8;
            border-top: 0 solid var(--border);
        }
        .faq-item.active .faq-answer {
            padding: 0 20px 18px;
            border-top-width: 1px;
        }

        /* ===== CTA区 ===== */
        .cta-section {
            background: var(--white);
            border-top: 1px solid var(--border);
        }
        .cta-box {
            max-width: 720px;
            margin: 0 auto;
            background: linear-gradient(135deg, #EFF6FF 0%, #fff 100%);
            border: 1px solid #DBEAFE;
            border-radius: var(--radius-2xl);
            padding: 40px 32px;
            text-align: center;
        }
        .cta-box h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 600;
            color: var(--title);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cta-box>p {
            color: var(--body);
            font-size: 15px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 440px;
            margin: 0 auto 12px;
        }
        .cta-form input {
            height: 48px;
            padding: 0 16px;
            border: 1px solid #CBD5E1;
            border-radius: 8px;
            font-size: 14px;
            color: var(--title);
            background: #fff;
            transition: border-color .2s, box-shadow .2s;
        }
        .cta-form input::placeholder {
            color: var(--muted);
        }
        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px var(--primary-light);
            outline: none;
        }
        .cta-form .btn-primary {
            height: 48px;
            width: 100%;
        }
        .microcopy {
            font-size: 12px;
            color: var(--muted);
            line-height: 1.6;
        }
        .microcopy a {
            color: var(--primary);
        }
        .microcopy a:hover {
            text-decoration: underline;
        }
        @media (min-width: 640px) {
            .cta-form {
                flex-direction: row;
            }
            .cta-form input {
                flex: 1;
            }
            .cta-form .btn-primary {
                width: auto;
                padding: 0 32px;
                white-space: nowrap;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--white);
            border-top: 1px solid var(--border);
            padding: 48px 0 32px;
        }
        .footer a {
            color: var(--body);
            font-size: 14px;
            transition: color .2s;
        }
        .footer a:hover {
            color: var(--primary);
        }
        .footer h3 {
            font-size: 14px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 16px;
        }
        .footer-link {
            transition: color .2s, padding-left .2s;
        }
        .footer-link:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1023px) {
            .sidebar {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .section {
                padding: 48px 16px;
            }
            .cta-box {
                padding: 32px 20px;
            }
        }
        @media (max-width: 640px) {
            .section {
                padding: 40px 16px;
            }
            .feature-card-large {
                min-height: 240px;
            }
            .preview-large {
                min-height: 240px;
            }
            .preview-small {
                flex-direction: row;
                align-items: flex-start;
            }
            .preview-small img {
                width: 80px;
                height: 60px;
            }
            .stat-number {
                font-size: 28px;
            }
        }