/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: #eff6ff;
  --secondary: #8b5cf6;
  --secondary-dark: #7c3aed;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --success: #10b981;
  --dark-bg: #0f172a;
  --dark-bg-2: #1e293b;
  --light-bg: #f1f5f9;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-white: #f8fafc;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.06);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.14);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 240px;
  --header-height: 64px;
  --max-width: 1200px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  font-size: 16px; line-height: 1.7; color: var(--text-primary); background: var(--light-bg);
  display: flex; min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
::selection { background: var(--primary); color: #fff; }

/* ===== 侧边栏导航 ===== */
.sidebar {
  position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
  background: var(--dark-bg); color: var(--text-white); z-index: 1000;
  display: flex; flex-direction: column; padding: 0;
  box-shadow: 2px 0 20px rgba(0,0,0,0.2); transition: transform var(--transition);
}
.sidebar-brand {
  padding: 28px 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; gap: 12px;
}
.sidebar-brand .brand-icon {
  width: 38px; height: 38px; background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: #fff; flex-shrink: 0;
}
.sidebar-brand .brand-text {
  font-size: 18px; font-weight: 700; color: #fff; line-height: 1.2;
  letter-spacing: 0.5px;
}
.sidebar-brand .brand-sub {
  font-size: 11px; color: var(--text-muted); font-weight: 400; letter-spacing: 1px;
  text-transform: uppercase; margin-top: 1px;
}
.sidebar-nav {
  flex: 1; padding: 16px 12px; overflow-y: auto;
}
.sidebar-nav li { margin-bottom: 2px; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px; padding: 11px 16px;
  border-radius: var(--radius-md); color: rgba(255,255,255,0.7); font-size: 15px;
  font-weight: 500; transition: all var(--transition); position: relative;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.active {
  background: rgba(37,99,235,0.2); color: var(--primary-light); font-weight: 600;
}
.sidebar-nav a.active::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 3px; height: 24px; background: var(--primary); border-radius: 0 4px 4px 0;
}
.sidebar-footer {
  padding: 16px 20px 24px; border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px; color: rgba(255,255,255,0.3); text-align: center;
}

/* ===== 移动端顶部导航 ===== */
.mobile-header {
  display: none; position: fixed; top: 0; left: 0; right: 0; height: var(--header-height);
  background: var(--dark-bg); z-index: 999; padding: 0 20px;
  align-items: center; justify-content: space-between; box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.mobile-header .mobile-brand {
  display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 17px;
}
.mobile-header .mobile-brand i { font-size: 24px; color: var(--primary-light); }
.menu-toggle {
  background: none; border: none; color: #fff; font-size: 26px; cursor: pointer;
  width: 42px; height: 42px; display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm); transition: background var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,0.08); }
.mobile-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998;
  opacity: 0; transition: opacity var(--transition);
}
.mobile-overlay.active { opacity: 1; }

/* ===== 主内容区 ===== */
.main-content {
  margin-left: var(--sidebar-width); flex: 1; min-height: 100vh;
  display: flex; flex-direction: column;
}

/* ===== 容器 ===== */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 32px; font-weight: 800; color: var(--text-primary); margin-bottom: 12px; }
.section-title p { font-size: 17px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; line-height: 1.6; }
.section-title .title-tag {
  display: inline-block; padding: 4px 14px; background: var(--primary-bg); color: var(--primary);
  border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 14px;
}

/* ===== Hero 区块 ===== */
.hero {
  position: relative; min-height: 520px; display: flex; align-items: center;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  overflow: hidden; padding: 80px 0;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center; background-repeat: no-repeat;
  opacity: 0.25; z-index: 1;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.7) 60%, rgba(15,23,42,0.3) 100%);
  z-index: 2;
}
.hero .container { position: relative; z-index: 3; }
.hero-content { max-width: 680px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px 6px 10px; background: rgba(37,99,235,0.2); border: 1px solid rgba(37,99,235,0.3);
  border-radius: 30px; font-size: 13px; color: var(--primary-light); margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-badge i { font-size: 14px; }
.hero h1 { font-size: 48px; font-weight: 900; color: #fff; line-height: 1.15; margin-bottom: 20px; letter-spacing: -0.5px; }
.hero h1 span { background: linear-gradient(135deg, var(--primary-light), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 18px; color: rgba(255,255,255,0.75); line-height: 1.7; margin-bottom: 32px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 13px 32px;
  border-radius: var(--radius-md); font-size: 16px; font-weight: 600; cursor: pointer;
  border: none; transition: all var(--transition); text-decoration: none; line-height: 1;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(37,99,235,0.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.45); color: #fff; }
.btn-secondary { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2); backdrop-filter: blur(4px); }
.btn-secondary:hover { background: rgba(255,255,255,0.18); color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 17px; }
.hero-stats { display: flex; gap: 32px; margin-top: 40px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.08); }
.hero-stat { text-align: left; }
.hero-stat .num { font-size: 28px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stat .num span { color: var(--primary-light); }
.hero-stat .label { font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }

/* ===== 核心优势 ===== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--card-bg); border-radius: var(--radius-lg); padding: 36px 28px;
  box-shadow: var(--shadow-md); transition: all var(--transition); border: 1px solid var(--border);
  text-align: center;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.feature-card .icon-wrap {
  width: 64px; height: 64px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; font-size: 28px; color: #fff;
}
.feature-card:nth-child(1) .icon-wrap { background: linear-gradient(135deg, #2563eb, #3b82f6); }
.feature-card:nth-child(2) .icon-wrap { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.feature-card:nth-child(3) .icon-wrap { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; }

/* ===== 分类入口 ===== */
.category-section { background: var(--card-bg); }
.category-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.category-card {
  display: flex; align-items: center; gap: 32px; background: var(--card-bg);
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md);
  border: 1px solid var(--border); transition: all var(--transition);
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.category-card .cat-img {
  width: 240px; min-height: 180px; flex-shrink: 0; background-size: cover; background-position: center;
  position: relative; overflow: hidden;
}
.category-card .cat-img::after {
  content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 60%, rgba(255,255,255,0.9) 100%);
}
.category-card .cat-info { flex: 1; padding: 28px 32px 28px 0; }
.category-card .cat-tag {
  display: inline-block; padding: 3px 12px; background: var(--primary-bg); color: var(--primary);
  border-radius: 20px; font-size: 12px; font-weight: 600; margin-bottom: 10px;
}
.category-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.category-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.category-card .cat-link {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--primary);
  font-size: 15px;
}
.category-card .cat-link i { transition: transform var(--transition); }
.category-card .cat-link:hover i { transform: translateX(4px); }

/* ===== 最新资讯 ===== */
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.news-card {
  background: var(--card-bg); border-radius: var(--radius-md); padding: 24px 28px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: all var(--transition);
}
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); border-color: var(--primary-light); }
.news-card .news-meta {
  display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 13px; color: var(--text-muted);
}
.news-card .news-cat {
  padding: 2px 10px; background: var(--primary-bg); color: var(--primary); border-radius: 12px;
  font-size: 12px; font-weight: 600;
}
.news-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; line-height: 1.4; }
.news-card h3 a { color: var(--text-primary); }
.news-card h3 a:hover { color: var(--primary); }
.news-card .news-excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .news-date { font-size: 12px; color: var(--text-muted); margin-top: 10px; display: flex; align-items: center; gap: 4px; }
.news-empty {
  grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 16px;
  background: var(--card-bg); border-radius: var(--radius-md); border: 1px dashed var(--border);
}

/* ===== 数据统计 ===== */
.stats-section {
  background: var(--dark-bg); position: relative; overflow: hidden;
}
.stats-section::before {
  content: ''; position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center; opacity: 0.08; z-index: 1;
}
.stats-section .container { position: relative; z-index: 2; }
.stats-section .section-title h2 { color: #fff; }
.stats-section .section-title p { color: rgba(255,255,255,0.6); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item {
  text-align: center; padding: 36px 20px; background: rgba(255,255,255,0.05);
  border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(8px); transition: all var(--transition);
}
.stat-item:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
.stat-item .stat-icon { font-size: 32px; color: var(--primary-light); margin-bottom: 12px; }
.stat-item .stat-num { font-size: 36px; font-weight: 900; color: #fff; line-height: 1.2; margin-bottom: 4px; }
.stat-item .stat-num span { color: var(--primary-light); }
.stat-item .stat-label { font-size: 14px; color: rgba(255,255,255,0.6); font-weight: 500; }

/* ===== 使用流程 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  text-align: center; padding: 32px 20px; background: var(--card-bg); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); border: 1px solid var(--border); position: relative; transition: all var(--transition);
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.step-card .step-num {
  width: 48px; height: 48px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 800;
  margin: 0 auto 16px; box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.step-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.step-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.step-connector { display: none; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--card-bg); border-radius: var(--radius-md); border: 1px solid var(--border);
  overflow: hidden; transition: all var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-item summary {
  padding: 18px 24px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--text-primary);
  display: flex; align-items: center; gap: 12px; list-style: none; transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--primary); font-size: 18px; transition: transform var(--transition); }
.faq-item[open] summary i { transform: rotate(90deg); }
.faq-item summary:hover { background: rgba(37,99,235,0.03); }
.faq-item .faq-answer { padding: 0 24px 18px 54px; font-size: 15px; color: var(--text-secondary); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  padding: 72px 0; text-align: center; position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover; background-position: center; opacity: 0.08; z-index: 1;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 34px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.cta-section p { font-size: 17px; color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 28px; }
.cta-section .btn-white {
  background: #fff; color: var(--primary); padding: 16px 40px; border-radius: var(--radius-md);
  font-size: 16px; font-weight: 700; border: none; cursor: pointer; transition: all var(--transition);
  display: inline-flex; align-items: center; gap: 8px; text-decoration: none;
}
.cta-section .btn-white:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); color: var(--primary-dark); }

/* ===== 页脚 ===== */
.footer {
  background: var(--dark-bg); color: rgba(255,255,255,0.6); padding: 48px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .footer-logo { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.footer-brand .footer-logo i { color: var(--primary-light); }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 320px; }
.footer h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: rgba(255,255,255,0.5); font-size: 14px; transition: color var(--transition); }
.footer ul a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,0.3);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--primary-light); }

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 12px; font-weight: 600;
}
.badge-primary { background: var(--primary-bg); color: var(--primary); }
.badge-secondary { background: rgba(139,92,246,0.1); color: var(--secondary); }
.badge-accent { background: rgba(245,158,11,0.1); color: var(--accent); }

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .news-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .hero h1 { font-size: 38px; }
  .section { padding: 56px 0; }
  .section-title h2 { font-size: 28px; }
}

@media (max-width: 768px) {
  body { display: block; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .mobile-header { display: flex; }
  .mobile-overlay.active { display: block; }
  .main-content { margin-left: 0; padding-top: var(--header-height); }
  .hero { min-height: auto; padding: 60px 0; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 16px; }
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .hero-stat .num { font-size: 22px; }
  .features-grid { grid-template-columns: 1fr; gap: 16px; }
  .category-card { flex-direction: column; }
  .category-card .cat-img { width: 100%; min-height: 180px; }
  .category-card .cat-img::after { display: none; }
  .category-card .cat-info { padding: 20px 24px 24px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-item { padding: 24px 16px; }
  .stat-item .stat-num { font-size: 28px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .step-card { padding: 24px 16px; }
  .news-grid { grid-template-columns: 1fr; }
  .news-card { padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 44px 0; }
  .section-title { margin-bottom: 32px; }
  .section-title h2 { font-size: 24px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .btn-lg { padding: 14px 32px; font-size: 16px; }
  .cta-section h2 { font-size: 26px; }
  .container { padding: 0 16px; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 15px; }
  .hero-stats { gap: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-item .stat-num { font-size: 24px; }
  .steps-grid { grid-template-columns: 1fr; }
  .step-card { display: flex; align-items: center; text-align: left; gap: 16px; padding: 16px 20px; }
  .step-card .step-num { margin: 0; flex-shrink: 0; }
  .features-grid { grid-template-columns: 1fr; }
  .section-title h2 { font-size: 22px; }
  .section { padding: 36px 0; }
  .faq-item summary { padding: 14px 16px; font-size: 15px; }
  .faq-item .faq-answer { padding: 0 16px 14px 44px; font-size: 14px; }
  .cta-section h2 { font-size: 22px; }
  .btn { padding: 11px 24px; font-size: 15px; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.gap-12 { gap: 12px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #6c5ce7;
  --primary-dark: #5a4bd1;
  --primary-light: #a29bfe;
  --accent: #fd79a8;
  --accent-dark: #e84393;
  --bg-dark: #0a0a1a;
  --bg-darker: #060612;
  --bg-card: #12122a;
  --bg-card-hover: #1a1a3a;
  --bg-sidebar: #0d0d22;
  --text-light: #f0f0ff;
  --text-muted: #9898c8;
  --text-dim: #6a6a9a;
  --border-color: #2a2a5a;
  --border-light: #3a3a6a;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(108,92,231,0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --sidebar-width: 260px;
  --header-height: 0px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-base);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: #fff; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; }
::selection { background: var(--primary); color: #fff; }

/* ===== Layout: Sidebar + Main ===== */
.app-wrapper {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform var(--transition);
  overflow-y: auto;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}
.brand-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #fff;
  box-shadow: 0 4px 15px rgba(108,92,231,0.3);
}
.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 2px;
}
.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
.sidebar-nav li a i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: var(--text-dim);
  transition: var(--transition);
}
.sidebar-nav li a:hover {
  background: rgba(108,92,231,0.1);
  color: var(--text-light);
}
.sidebar-nav li a:hover i {
  color: var(--primary-light);
}
.sidebar-nav li a.active {
  background: linear-gradient(135deg, rgba(108,92,231,0.2), rgba(253,121,168,0.1));
  color: #fff;
  border: 1px solid rgba(108,92,231,0.3);
  box-shadow: 0 0 20px rgba(108,92,231,0.08);
}
.sidebar-nav li a.active i {
  color: var(--primary-light);
}
.sidebar-nav li a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 24px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  border-radius: 0 4px 4px 0;
}
.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-color);
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* ===== Main Content Area ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ===== Article Page ===== */
.article-page {
  flex: 1;
  padding: 40px 0 60px;
}
.article-banner {
  position: relative;
  padding: 60px 0 40px;
  background: linear-gradient(135deg, rgba(10,10,26,0.95), rgba(18,18,42,0.9)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 40px;
}
.article-banner .container {
  position: relative;
  z-index: 2;
}
.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(108,92,231,0.2);
  border: 1px solid rgba(108,92,231,0.3);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 16px;
}
.article-badge i {
  font-size: 12px;
}
.article-banner h1 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 800px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--text-muted);
  font-size: 14px;
}
.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta i {
  color: var(--primary-light);
  font-size: 13px;
}
.article-body {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  margin-bottom: 40px;
}
.article-body .content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-light);
}
.article-body .content p {
  margin-bottom: 1.2em;
}
.article-body .content h2,
.article-body .content h3 {
  color: #fff;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
}
.article-body .content h2 { font-size: 24px; }
.article-body .content h3 { font-size: 20px; }
.article-body .content ul,
.article-body .content ol {
  margin: 1em 0;
  padding-left: 24px;
}
.article-body .content li {
  margin-bottom: 0.5em;
}
.article-body .content a {
  color: var(--primary-light);
  border-bottom: 1px solid rgba(108,92,231,0.3);
}
.article-body .content a:hover {
  color: #fff;
  border-bottom-color: #fff;
}
.article-body .content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  margin: 1.2em 0;
  background: rgba(108,92,231,0.06);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
}
.article-body .content img {
  border-radius: var(--radius-md);
  margin: 1.5em 0;
  width: 100%;
  max-width: 100%;
}
.article-body .content code {
  background: rgba(108,92,231,0.15);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--primary-light);
}
.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
}
.article-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 14px;
  transition: var(--transition);
  max-width: 48%;
}
.article-nav a:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  color: #fff;
}
.article-nav .nav-prev i { margin-right: 4px; }
.article-nav .nav-next i { margin-left: 4px; }
.article-not-found {
  text-align: center;
  padding: 80px 20px;
}
.article-not-found .not-found-icon {
  font-size: 64px;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.article-not-found h2 {
  font-size: 28px;
  color: #fff;
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 16px;
}
.article-not-found .btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.article-not-found .btn-back:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(108,92,231,0.3);
  color: #fff;
}

/* ===== CTA Section ===== */
.article-cta {
  background: linear-gradient(135deg, rgba(108,92,231,0.08), rgba(253,121,168,0.05));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  padding: 48px;
  text-align: center;
}
.article-cta h3 {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.article-cta p {
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 24px;
  font-size: 15px;
}
.article-cta .btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108,92,231,0.35);
  color: #fff;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--text-light);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: var(--transition);
}
.btn-outline:hover {
  border-color: var(--primary-light);
  color: #fff;
  background: rgba(108,92,231,0.1);
  transform: translateY(-2px);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .footer-logo {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand .footer-logo i {
  color: var(--primary-light);
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
}
.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}
.footer ul li {
  margin-bottom: 10px;
}
.footer ul li a {
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.footer ul li a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer ul li a i {
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom a {
  color: var(--text-muted);
}
.footer-bottom a:hover {
  color: var(--primary-light);
}

/* ===== Mobile Menu Toggle ===== */
.mobile-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 1100;
  width: 44px;
  height: 44px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: var(--shadow-md);
}
.mobile-toggle:hover {
  background: var(--bg-card-hover);
}
.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 999;
  backdrop-filter: blur(4px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-banner h1 { font-size: 28px; }
  .article-body { padding: 32px; }
}
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .mobile-overlay { display: block; opacity: 0; pointer-events: none; transition: var(--transition); }
  .mobile-overlay.active { opacity: 1; pointer-events: auto; }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
    box-shadow: 0 0 50px rgba(0,0,0,0.5);
  }
  .main-content {
    margin-left: 0;
  }
  .article-banner {
    padding: 80px 0 30px;
  }
  .article-banner h1 {
    font-size: 24px;
  }
  .article-meta {
    gap: 12px;
    font-size: 13px;
    flex-wrap: wrap;
  }
  .article-body {
    padding: 20px;
    border-radius: var(--radius-md);
  }
  .article-body .content {
    font-size: 15px;
  }
  .article-nav {
    flex-direction: column;
  }
  .article-nav a {
    max-width: 100%;
  }
  .article-cta {
    padding: 32px 20px;
  }
  .article-cta h3 {
    font-size: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .article-banner h1 {
    font-size: 20px;
  }
  .article-body {
    padding: 16px;
  }
  .article-cta .btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-primary, .btn-outline {
    justify-content: center;
  }
}

/* ===== Scrollbar ===== */
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary: #7c3aed;
  --secondary-light: #8b5cf6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --card-bg: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.03);
  --shadow-xl: 0 20px 40px -5px rgba(0,0,0,0.1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --sidebar-width: 240px;
  --header-height: 0px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea { font-family: inherit; border: none; outline: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--dark); }
h1 { font-size: 2.75rem; }
h2 { font-size: 2.125rem; margin-bottom: 0.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
p { margin-bottom: 0.75rem; color: var(--text-light); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { text-align: center; margin-bottom: 12px; }
.section-subtitle { text-align: center; color: var(--text-light); font-size: 1.1rem; max-width: 640px; margin: 0 auto 48px; }

/* ===== 布局：左侧导航 + 右侧内容 ===== */
.app-layout { display: flex; min-height: 100vh; }

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-width);
  background: var(--dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  padding: 0;
  overflow-y: auto;
  transition: transform var(--transition);
}
.sidebar-brand {
  padding: 28px 20px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  flex-shrink: 0;
}
.brand-text { font-size: 1.15rem; font-weight: 700; color: #fff; letter-spacing: 0.5px; line-height: 1.2; }
.brand-sub { font-size: 0.7rem; color: var(--text-lighter); letter-spacing: 1px; text-transform: uppercase; margin-top: 1px; }
.sidebar-nav { flex: 1; padding: 16px 12px; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.65);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
}
.sidebar-nav li a i { width: 20px; text-align: center; font-size: 1.1rem; }
.sidebar-nav li a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.sidebar-nav li a.active { background: rgba(37, 99, 235, 0.25); color: #fff; font-weight: 600; }
.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem;
  color: var(--text-lighter);
  text-align: center;
}

/* ===== 主内容区 ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 100px 0 80px;
  background: linear-gradient(135deg, var(--dark) 0%, #1a1a3e 50%, #0f2b5e 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.2;
  mix-blend-mode: overlay;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(37,99,235,0.15) 0%, transparent 70%);
}
.hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.2);
  border: 1px solid rgba(37,99,235,0.3);
  color: #93c5fd;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero h1 { color: #fff; font-size: 3rem; margin-bottom: 16px; line-height: 1.2; }
.hero p { color: rgba(255,255,255,0.7); font-size: 1.15rem; max-width: 600px; margin-bottom: 32px; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 36px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stat h3 { color: #fff; font-size: 1.75rem; font-weight: 700; }
.hero-stat p { color: rgba(255,255,255,0.5); font-size: 0.85rem; margin: 0; }

/* ===== 平台分类卡片 ===== */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.platform-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.platform-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.platform-card-img {
  height: 180px;
  background: var(--bg-alt);
  position: relative;
  overflow: hidden;
}
.platform-card-img img { width: 100%; height: 100%; object-fit: cover; }
.platform-card-img .tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}
.platform-card-body { padding: 20px; }
.platform-card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.platform-card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 16px; }
.platform-meta { display: flex; gap: 12px; flex-wrap: wrap; }
.platform-meta span { display: inline-flex; align-items: center; gap: 4px; font-size: 0.8rem; color: var(--text-lighter); }
.platform-meta span i { color: var(--primary); }

/* ===== 平台详情区块 ===== */
.platform-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.platform-detail.reverse { direction: rtl; }
.platform-detail.reverse > * { direction: ltr; }
.platform-detail-img { border-radius: var(--radius); overflow: hidden; height: 280px; }
.platform-detail-img img { width: 100%; height: 100%; object-fit: cover; }
.platform-detail-content h3 { font-size: 1.5rem; margin-bottom: 12px; }
.platform-detail-content p { margin-bottom: 16px; }
.platform-features { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.platform-features span {
  background: var(--bg-alt);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--text-light);
  border: 1px solid var(--border);
}

/* ===== 对比表格 ===== */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
table { width: 100%; border-collapse: collapse; background: var(--card-bg); }
thead { background: var(--dark); color: #fff; }
th { padding: 16px 20px; text-align: left; font-weight: 600; font-size: 0.9rem; letter-spacing: 0.5px; }
td { padding: 14px 20px; border-bottom: 1px solid var(--border); font-size: 0.9rem; color: var(--text-light); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg-alt); }
td:first-child { font-weight: 600; color: var(--text); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  color: var(--dark);
  cursor: pointer;
  background: none;
  width: 100%;
  text-align: left;
}
.faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition);
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-item.active .faq-answer { padding: 0 24px 20px; max-height: 300px; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--dark) 0%, #1a1a3e 100%);
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.1;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { color: #fff; font-size: 2.25rem; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
.btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37,99,235,0.4); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.btn-secondary {
  background: var(--secondary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(124,58,237,0.35);
}
.btn-secondary:hover { background: #6d28d9; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(124,58,237,0.4); }

/* ===== 标签 ===== */
.tag { display: inline-flex; align-items: center; gap: 4px; padding: 4px 12px; border-radius: 50px; font-size: 0.75rem; font-weight: 600; }
.tag-blue { background: rgba(37,99,235,0.1); color: var(--primary); }
.tag-purple { background: rgba(124,58,237,0.1); color: var(--secondary); }
.tag-green { background: rgba(5,150,105,0.1); color: #059669; }
.tag-orange { background: rgba(234,88,12,0.1); color: #ea580c; }

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 1.2rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-logo i { color: var(--primary); }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 360px; }
.footer h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; letter-spacing: 0.5px; text-transform: uppercase; }
.footer ul { display: flex; flex-direction: column; gap: 10px; }
.footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: color var(--transition); display: flex; align-items: center; gap: 6px; }
.footer ul li a:hover { color: #fff; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: var(--primary-light); }
.footer-bottom a:hover { color: #fff; }

/* ===== 移动端菜单切换 ===== */
.mobile-toggle { display: none; }
.sidebar-overlay { display: none; }

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-lighter);
  padding: 16px 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-light); }

/* ===== 统计卡片 ===== */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-top: 40px; }
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.stat-card i { font-size: 1.75rem; color: var(--primary); margin-bottom: 8px; }
.stat-card h4 { font-size: 1.75rem; color: var(--dark); margin-bottom: 4px; }
.stat-card p { font-size: 0.85rem; color: var(--text-light); margin: 0; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .platform-detail { grid-template-columns: 1fr; padding: 28px; }
  .platform-detail.reverse { direction: ltr; }
  .platform-detail-img { height: 220px; }
  .hero h1 { font-size: 2.25rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }
  .sidebar-overlay.open { opacity: 1; pointer-events: auto; }
  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--dark);
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    border: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1100;
    box-shadow: var(--shadow-md);
  }
  .main-content { margin-left: 0; }
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 1.75rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .section { padding: 56px 0; }
  h2 { font-size: 1.625rem; }
  .platform-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn-group { flex-direction: column; align-items: center; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.5rem; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .stats-row { grid-template-columns: 1fr; }
  .platform-detail { padding: 20px; }
  .platform-detail-img { height: 180px; }
  .faq-question { padding: 14px 18px; font-size: 0.95rem; }
  .container { padding: 0 16px; }
  .section { padding: 40px 0; }
  h2 { font-size: 1.35rem; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.gap-2 { gap: 16px; }
.flex-center { display: flex; align-items: center; justify-content: center; }