/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #C2102F;
  --primary-dark: #9A0C24;
  --primary-light: #E63950;
  --accent: #D4AF37;
  --bg-white: #FFFFFF;
  --bg-light: #F7F8FA;
  --bg-dark: #171726;
  --text-dark: #1F2937;
  --text-body: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --shadow-xs: 0 2px 6px rgba(0,0,0,0.05);
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.07);
  --shadow-md: 0 10px 30px rgba(0,0,0,0.10);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.14);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --container-width: 1200px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", "Microsoft YaHei", "Hiragino Sans GB", sans-serif; font-size: 16px; line-height: 1.7; color: var(--text-body); background: var(--bg-white); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; background: none; }
ul, ol { list-style: none; }

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

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 50px; font-weight: 600; font-size: 15px; letter-spacing: 0.3px; cursor: pointer; transition: var(--transition); white-space: nowrap; line-height: 1.2; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(194,16,47,0.3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(154,12,36,0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(154,12,36,0.25); }
.btn-outline { border: 2px solid rgba(255,255,255,0.7); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: var(--bg-white); box-shadow: 0 6px 20px rgba(212,175,55,0.35); }
.btn-accent:hover { filter: brightness(1.05); transform: translateY(-2px); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 17px; }

/* ===== 标签 / 徽章 ===== */
.badge { display: inline-block; padding: 4px 14px; border-radius: 30px; font-size: 12px; font-weight: 600; line-height: 1.5; background: rgba(194,16,47,0.1); color: var(--primary); }
.badge-accent { background: rgba(212,175,55,0.15); color: #A8820B; }
.badge-dark { background: rgba(23,23,38,0.08); color: var(--bg-dark); }
.badge-green { background: rgba(16,185,129,0.1); color: #0E8A63; }

/* ===== 头部导航 ===== */
.site-header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-xs); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; box-shadow: 0 4px 12px rgba(194,16,47,0.3); }
.brand-text { font-size: 20px; font-weight: 800; color: var(--text-dark); letter-spacing: 0.5px; }
.main-nav { display: flex; align-items: center; gap: 8px; margin: 0 auto; }
.main-nav .nav-link { padding: 8px 18px; border-radius: 30px; font-weight: 600; font-size: 15px; color: var(--text-body); transition: var(--transition); }
.main-nav .nav-link:hover { color: var(--primary); background: rgba(194,16,47,0.06); }
.main-nav .nav-link.active { color: var(--primary); background: rgba(194,16,47,0.1); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.search-box { display: flex; align-items: center; background: var(--bg-light); border-radius: 40px; padding: 6px 8px 6px 18px; border: 1px solid transparent; transition: var(--transition); }
.search-box:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(194,16,47,0.08); }
.search-box input { width: 160px; font-size: 14px; color: var(--text-dark); }
.search-box input::placeholder { color: var(--text-muted); }
.search-box button { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 14px; cursor: pointer; transition: var(--transition); }
.search-box button:hover { background: var(--primary-dark); }
.mobile-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; background: var(--bg-light); align-items: center; justify-content: center; font-size: 20px; color: var(--text-dark); cursor: pointer; }

/* 移动端菜单 */
.mobile-menu { display: none; position: fixed; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); padding: 16px 24px 24px; z-index: 999; }
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 12px 16px; font-weight: 600; color: var(--text-dark); border-radius: var(--radius-sm); }
.mobile-menu a:hover { background: var(--bg-light); color: var(--primary); }
.mobile-menu .btn { margin-top: 12px; width: 100%; }

/* ===== Hero 首屏 ===== */
.hero { background: linear-gradient(135deg, rgba(194,16,47,0.92), rgba(23,23,38,0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; color: #fff; padding: 120px 0 90px; min-height: 560px; display: flex; align-items: center; }
.hero-content { max-width: 720px; }
.hero .hero-badge { display: inline-block; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.2); color: #fff; padding: 6px 18px; border-radius: 40px; font-size: 14px; font-weight: 600; margin-bottom: 22px; backdrop-filter: blur(4px); }
.hero h1 { font-size: 46px; font-weight: 800; line-height: 1.25; margin-bottom: 18px; letter-spacing: 1px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 18px; line-height: 1.8; opacity: 0.92; margin-bottom: 32px; max-width: 640px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.15); flex-wrap: wrap; }
.hero-stat-item { text-align: center; }
.hero-stat-num { font-size: 32px; font-weight: 800; color: #fff; display: block; line-height: 1.2; }
.hero-stat-label { font-size: 14px; opacity: 0.75; margin-top: 4px; }

/* ===== 更新条 ===== */
.ticker-bar { background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 10px 0; overflow: hidden; }
.ticker-inner { display: flex; align-items: center; gap: 40px; animation: tickerMove 30s linear infinite; white-space: nowrap; }
.ticker-inner span { font-size: 14px; display: inline-flex; align-items: center; gap: 8px; }
.ticker-inner i { color: var(--accent); }
@keyframes tickerMove { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ===== 通用板块 ===== */
.section { padding: 90px 0; }
.section-head { text-align: center; margin-bottom: 56px; position: relative; }
.section-head .section-tag { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; margin-bottom: 10px; }
.section-head h2 { font-size: 36px; font-weight: 800; color: var(--text-dark); line-height: 1.3; margin-bottom: 12px; }
.section-head p { font-size: 16px; color: var(--text-body); max-width: 600px; margin: 0 auto; }
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255,255,255,0.7); }

/* ===== 核心功能 ===== */
.features-section { background: var(--bg-light); }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { background: #fff; border-radius: var(--radius-md); padding: 36px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden; }
.feature-card::after { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--primary), var(--accent)); transform: scaleX(0); transform-origin: left; transition: var(--transition); }
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.feature-card:hover::after { transform: scaleX(1); }
.feature-icon { width: 64px; height: 64px; border-radius: 16px; background: linear-gradient(135deg, rgba(194,16,47,0.1), rgba(212,175,55,0.1)); display: flex; align-items: center; justify-content: center; font-size: 26px; color: var(--primary); margin-bottom: 22px; transition: var(--transition); }
.feature-card:hover .feature-icon { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; transform: scale(1.05); }
.feature-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.feature-card p { font-size: 14px; line-height: 1.7; color: var(--text-body); }

/* ===== 分类入口 ===== */
.category-section { background: #fff; }
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.category-card { background: var(--bg-light); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); position: relative; }
.category-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.category-card .cover { height: 200px; overflow: hidden; position: relative; }
.category-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .cover img { transform: scale(1.08); }
.category-card .cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, rgba(0,0,0,0.4)); }
.category-card .cat-badge { position: absolute; top: 16px; left: 16px; z-index: 2; background: rgba(255,255,255,0.9); color: var(--primary); font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 30px; }
.category-card .card-body { padding: 28px; }
.category-card .card-body h3 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.category-card .card-body p { font-size: 15px; line-height: 1.7; color: var(--text-body); margin-bottom: 16px; }
.category-card .card-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--primary); font-size: 15px; }
.category-card .card-link i { transition: transform 0.3s ease; }
.category-card:hover .card-link i { transform: translateX(4px); }

/* ===== 资讯列表 ===== */
.news-section { background: var(--bg-light); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-xs); transition: var(--transition); display: flex; flex-direction: column; }
.news-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.news-thumb { height: 180px; overflow: hidden; position: relative; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-thumb::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,0.2)); }
.news-body { padding: 24px 28px 20px; flex: 1; display: flex; flex-direction: column; }
.news-body .badge { align-self: flex-start; margin-bottom: 12px; }
.news-body h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); line-height: 1.5; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-body p { font-size: 14px; color: var(--text-body); line-height: 1.7; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--text-muted); padding-top: 14px; border-top: 1px solid var(--border); }
.news-meta i { margin-right: 4px; }
.news-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; background: #fff; border-radius: var(--radius-md); border: 1px dashed var(--border); color: var(--text-muted); font-size: 16px; }

/* ===== 数据统计 ===== */
.stats-section { background: var(--bg-dark); color: #fff; padding: 80px 0; }
.stats-section .section-head h2 { color: #fff; }
.stats-section .section-head p { color: rgba(255,255,255,0.7); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; text-align: center; }
.stat-item .stat-num { font-size: 48px; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-item .stat-num small { font-size: 20px; font-weight: 700; margin-left: 2px; }
.stat-item .stat-label { font-size: 16px; opacity: 0.8; margin-top: 8px; }

/* ===== 使用流程 ===== */
.process-section { background: #fff; }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
.process-step { text-align: center; padding: 32px 20px; position: relative; }
.process-step::before { counter-increment: step; content: counter(step); position: absolute; top: -16px; left: 50%; transform: translateX(-50%); width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; font-weight: 700; font-size: 16px; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 16px rgba(194,16,47,0.3); font-family: -apple-system, BlinkMacSystemFont, sans-serif; }
.process-step .step-icon { width: 80px; height: 80px; margin: 16px auto 20px; border-radius: 50%; background: var(--bg-light); display: flex; align-items: center; justify-content: center; font-size: 28px; color: var(--primary); }
.process-step h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg-light); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 16px; overflow: hidden; box-shadow: var(--shadow-xs); }
.faq-item summary { list-style: none; cursor: pointer; padding: 22px 28px; display: flex; justify-content: space-between; align-items: center; font-size: 16px; font-weight: 600; color: var(--text-dark); transition: var(--transition); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-toggle { width: 28px; height: 28px; border-radius: 50%; background: var(--bg-light); display: flex; align-items: center; justify-content: center; font-size: 14px; color: var(--primary); transition: var(--transition); flex-shrink: 0; }
.faq-item[open] summary { color: var(--primary); }
.faq-item[open] summary .faq-toggle { background: var(--primary); color: #fff; transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 28px 22px; font-size: 15px; line-height: 1.8; color: var(--text-body); }

/* ===== CTA ===== */
.cta-section { padding: 100px 0; background: linear-gradient(135deg, rgba(194,16,47,0.94), rgba(154,12,36,0.9)), url('/assets/images/backpic/back-3.png') center/cover no-repeat; color: #fff; text-align: center; }
.cta-section h2 { font-size: 40px; font-weight: 800; margin-bottom: 16px; line-height: 1.25; }
.cta-section p { font-size: 18px; opacity: 0.9; margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== 页脚 ===== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.65); padding: 60px 0 30px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .footer-logo i { color: var(--accent); font-size: 24px; }
.footer-brand .footer-logo span { font-size: 20px; font-weight: 800; color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; position: relative; padding-bottom: 12px; }
.footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 3px; background: var(--primary); border-radius: 2px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-col.contact-col .contact-line { display: flex; gap: 10px; margin-bottom: 12px; font-size: 14px; align-items: flex-start; }
.footer-col.contact-col .contact-line i { color: var(--accent); margin-top: 3px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; font-size: 13px; color: rgba(255,255,255,0.35); flex-wrap: wrap; gap: 10px; }

/* ===== 回到顶部 ===== */
.back-top { position: fixed; bottom: 32px; right: 32px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transition: var(--transition); z-index: 99; cursor: pointer; }
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-dark); transform: translateY(-4px); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 40px; }
  .features-grid { grid-template-columns: repeat(3, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .main-nav .nav-link { padding: 8px 12px; font-size: 14px; }
  .search-box input { width: 120px; }
}
@media (max-width: 768px) {
  .nav-wrap { height: 64px; }
  .main-nav { display: none; }
  .search-box { display: flex; flex: 1; max-width: 200px; }
  .mobile-toggle { display: flex; }
  .nav-actions .btn-download { display: none; }
  .hero { padding: 80px 0 60px; min-height: auto; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 24px; margin-top: 36px; }
  .hero-stat-num { font-size: 26px; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 28px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .stat-item .stat-num { font-size: 36px; }
  .cta-section h2 { font-size: 30px; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .nav-wrap { gap: 10px; }
  .search-box { display: none; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 15px; }
  .hero-actions .btn { padding: 10px 20px; font-size: 14px; }
  .features-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .btn { padding: 10px 22px; }
  .cta-actions { flex-direction: column; align-items: center; }
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: #D1D5DB; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

::selection { background: rgba(194,16,47,0.2); color: var(--primary-dark); }

/* roulang page: category1 */
:root {
  --primary: #1e3a8a;
  --primary-dark: #182f6b;
  --accent: #d4a853;
  --accent-light: #f5e7c9;
  --bg: #ffffff;
  --bg-gray: #f5f7fb;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(30, 58, 138, .06);
  --shadow-md: 0 8px 28px rgba(30, 58, 138, .10);
  --shadow-lg: 0 18px 50px rgba(30, 58, 138, .16);
  --space: 16px;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s, background .25s, box-shadow .25s, transform .25s;
}

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

ul, ol {
  list-style: none;
}

input, button {
  font-family: inherit;
  font-size: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

.section-padding {
  padding: 88px 0;
}

.section-header {
  max-width: 680px;
  margin-bottom: 44px;
}

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

.section-tag {
  display: inline-block;
  background: var(--accent-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 40px;
  letter-spacing: .5px;
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-weak);
  font-size: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: all .28s ease;
  white-space: nowrap;
}

.btn i {
  font-size: 17px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.btn-light {
  background: #fff;
  color: var(--primary);
  border-color: #fff;
}

.btn-light:hover {
  background: var(--accent-light);
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}

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

.eyebrow-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 10px 18px;
  box-shadow: var(--shadow-sm);
  font-size: 14px;
}

.eyebrow-bar .bar-icon {
  color: var(--accent);
}

.eyebrow-bar .badge {
  background: var(--accent-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 20px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(15, 23, 42, .04);
}

.header-inner {
  display: flex;
  align-items: center;
  min-height: 70px;
  gap: 28px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.3px;
  flex-shrink: 0;
}

.brand-logo i {
  color: var(--accent);
  font-size: 26px;
}

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

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-weak);
  padding: 9px 16px;
  border-radius: 40px;
  white-space: nowrap;
}

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

.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(30, 58, 138, .28);
}

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

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-gray);
  border: 1px solid var(--border);
  border-radius: 40px;
  padding: 7px 8px 7px 14px;
  width: 190px;
  transition: border-color .25s, box-shadow .25s, width .3s;
}

.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, .12);
  width: 220px;
}

.search-box input {
  border: none;
  background: transparent;
  width: 100%;
  font-size: 14px;
  color: var(--text);
  outline: none;
}

.search-box input::placeholder {
  color: #94a3b8;
}

.search-box button {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  transition: background .25s;
}

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

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 40px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: var(--primary);
  font-size: 18px;
  border: 1px solid var(--border);
  background: #fff;
  align-items: center;
  justify-content: center;
  transition: all .25s;
}

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

/* Hero */
.download-hero {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  min-height: 560px;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}

.download-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(15, 23, 42, .92) 20%, rgba(30, 58, 138, .72) 60%, rgba(212, 168, 83, .45)) , ;
  z-index: 0;
}

.hero-container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 50px;
  align-items: center;
  padding: 60px 0;
}

.hero-copy {
  max-width: 540px;
}

.hero-copy .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(8px);
  border-radius: 40px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
  color: #ffe8b8;
}

.hero-copy h1 {
  font-size: 46px;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
}

.hero-copy h1 .highlight {
  color: #f5c76f;
}

.hero-copy p {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, .85);
  margin-bottom: 28px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
}

.hero-note i {
  color: #f5c76f;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-visual .main-shot {
  border-radius: 26px;
  border: 2px solid rgba(255, 255, 255, .2);
  box-shadow: 0 30px 60px rgba(0, 0, 0, .4);
  max-width: 360px;
  width: 100%;
  transform: perspective(1200px) rotateY(-8deg);
  transition: transform .6s ease;
}

.hero-visual .main-shot:hover {
  transform: perspective(1200px) rotateY(0deg);
}

.float-card {
  position: absolute;
  background: rgba(255, 255, 255, .14);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 14px;
  padding: 10px 16px;
  font-size: 13px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .25);
  animation: floatUp 4s ease-in-out infinite;
}

.float-card i {
  color: #f5c76f;
}

.fc-1 {
  top: 12%;
  left: -6%;
}

.fc-2 {
  bottom: 14%;
  right: -4%;
  animation-delay: 2s;
}

@keyframes floatUp {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Update bar */
.update-strip {
  background: linear-gradient(90deg, #0f172a, #1e3a8a);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  padding: 14px 0;
  overflow: hidden;
}

.update-strip .strip-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  white-space: nowrap;
  animation: scrollStrip 22s linear infinite;
}

@keyframes scrollStrip {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.strip-inner .strip-item {
  color: rgba(255, 255, 255, .85);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.strip-inner .strip-item i {
  color: #f5c76f;
}

/* Channel cards */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.channel-card {
  padding: 36px 30px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.channel-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s;
}

.channel-card:hover::after {
  transform: scaleX(1);
}

.channel-icon {
  width: 82px;
  height: 82px;
  border-radius: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  margin-bottom: 20px;
}

.channel-icon.ios {
  background: #13151a;
  color: #fff;
}

.channel-icon.android {
  background: #3bdd6c;
  color: #fff;
}

.channel-icon.scan {
  background: var(--accent-light);
  color: var(--primary);
}

.channel-card h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}

.channel-card p {
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 18px;
  line-height: 1.7;
  min-height: 44px;
}

.channel-meta {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.meta-chip {
  background: var(--bg-gray);
  border-radius: 30px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--text-weak);
}

.channel-card .btn {
  width: 100%;
}

/* Version section */
.version-section {
  background: var(--bg-gray);
}

.version-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 46px;
  align-items: center;
}

.version-panel {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.version-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
}

.version-head .version-num {
  font-size: 22px;
  font-weight: 900;
}

.version-head .version-status {
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .24);
  border-radius: 30px;
  padding: 4px 14px;
  font-size: 13px;
}

.version-list {
  padding: 10px 28px 20px;
}

.version-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}

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

.version-item .label {
  color: var(--text-weak);
}

.version-item .value {
  font-weight: 700;
  color: var(--text);
}

.version-item .value.good {
  color: #16a34a;
}

.version-card-image {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  overflow: hidden;
}

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

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

.step-card {
  padding: 32px 24px 28px;
  position: relative;
  text-align: center;
  background: #fff;
  border-top: 4px solid transparent;
}

.step-card:hover {
  border-top-color: var(--accent);
}

.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--primary);
  font-weight: 900;
  font-size: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
}

.step-card p {
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.7;
}

.step-arrow {
  display: none;
}

/* Feature brief */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.feature-card {
  display: flex;
  gap: 18px;
  padding: 24px;
  align-items: center;
}

.feature-card .thumb {
  width: 130px;
  height: 100px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 6px;
}

.feature-card p {
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.6;
}

/* FAQ */
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s;
}

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

.faq-item input[type="checkbox"] {
  display: none;
}

.faq-item label {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  position: relative;
}

.faq-item label .faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  flex-shrink: 0;
  transition: transform .3s;
}

.faq-item label::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  margin-left: auto;
  color: var(--text-weak);
  font-size: 14px;
  transition: transform .3s;
}

.faq-item input:checked + label::after {
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}

.faq-item input:checked ~ .faq-answer {
  max-height: 300px;
}

.faq-answer-inner {
  padding: 0 24px 22px 64px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.8;
}

/* CTA */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #0f172a, #1e3a8a), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  background-blend-mode: overlay;
  color: #fff;
  text-align: center;
  padding: 90px 0;
  overflow: hidden;
}

.cta-section .cta-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  margin: 0 auto;
}

.cta-section h2 {
  font-size: 38px;
  font-weight: 900;
  margin-bottom: 18px;
}

.cta-section p {
  color: rgba(255, 255, 255, .8);
  font-size: 17px;
  margin-bottom: 32px;
}

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

.cta-meta {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 26px;
  color: rgba(255, 255, 255, .65);
  font-size: 14px;
  flex-wrap: wrap;
}

.cta-meta i {
  color: var(--accent);
}

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: #cbd5e1;
  padding: 70px 0 0;
  margin-top: 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, .1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
}

.footer-logo i {
  color: var(--accent);
  font-size: 26px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #94a3b8;
  max-width: 280px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: .5px;
}

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

.footer-col ul li a {
  color: #94a3b8;
  font-size: 14px;
}

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

.contact-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 14px;
  color: #94a3b8;
}

.contact-line i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  font-size: 13px;
  color: #64748b;
  flex-wrap: wrap;
  gap: 10px;
}

/* Responsive */
@media (max-width: 1024px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 16px;
    padding: 12px 0;
  }

  .main-nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
  }

  .search-box {
    margin-left: auto;
  }

  .hero-copy h1 {
    font-size: 38px;
  }

  .hero-container {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .hero-visual {
    order: 2;
  }

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

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

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

@media (max-width: 768px) {
  .section-padding {
    padding: 64px 0;
  }

  .section-header h2 {
    font-size: 28px;
  }

  .header-inner {
    flex-wrap: nowrap;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    align-items: flex-start;
    padding: 18px 24px;
    width: 100%;
  }

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

  .nav-link {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
  }

  .header-actions .search-box {
    display: none;
  }

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

  .nav-toggle {
    display: inline-flex;
  }

  .hero-copy h1 {
    font-size: 32px;
  }

  .hero-copy p {
    font-size: 16px;
  }

  .hero-buttons .btn {
    width: 100%;
  }

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

  .version-layout {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .faq-answer-inner {
    padding-left: 24px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .brand-logo {
    font-size: 18px;
  }

  .brand-logo i {
    font-size: 22px;
  }

  .hero-copy h1 {
    font-size: 27px;
  }

  .hero-copy p {
    font-size: 15px;
  }

  .hero-note {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .float-card {
    display: none;
  }

  .section-header h2 {
    font-size: 24px;
  }

  .channel-card {
    padding: 28px 20px;
  }

  .channel-card p {
    min-height: auto;
  }

  .feature-card {
    flex-direction: column;
    text-align: center;
  }

  .feature-card .thumb {
    width: 100%;
    height: auto;
    max-height: 170px;
  }

  .cta-section h2 {
    font-size: 28px;
  }

  .cta-buttons .btn {
    width: 100%;
  }
}

/* roulang page: category2 */
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif; line-height: 1.7; color: #1a2333; background: #f6f8fc; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: color .2s ease; }
img { max-width: 100%; display: block; } 
button { font-family: inherit; border: none; cursor: pointer; }
input, select, textarea { font-family: inherit; outline: none; }
ul, ol { list-style: none; }

/* ===== Design Variables ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #60a5fa;
  --primary-soft: #eff6ff;
  --accent: #f59e0b;
  --accent-soft: #fef3c7;
  --success: #10b981;
  --success-soft: #d1fae5;
  --bg-body: #f6f8fc;
  --bg-white: #ffffff;
  --bg-gray: #f0f2f6;
  --bg-dark: #0f172a;
  --text-main: #1a2333;
  --text-body: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border-light: #e2e8f0;
  --border-mid: #cbd5e1;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 4px 20px rgba(15, 23, 42, .08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);
  --shadow-primary: 0 8px 30px rgba(37, 99, 235, .22);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --container-w: 1200px;
  --transition: all .25s cubic-bezier(.4, 0, .2, 1);
}

/* ===== Container ===== */
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.site-header { position: sticky; top: 0; z-index: 999; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; padding: 0 24px; max-width: 1320px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--text-main); letter-spacing: -.5px; }
.logo i { color: var(--primary); font-size: 24px; }
.logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.main-nav { display: flex; align-items: center; gap: 32px; margin-left: 32px; }
.main-nav .nav-link { font-size: 15px; font-weight: 500; color: var(--text-body); position: relative; padding: 26px 2px; transition: var(--transition); }
.main-nav .nav-link::after { content: ''; position: absolute; bottom: 16px; left: 0; width: 0; height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transition: width .3s ease; }
.main-nav .nav-link:hover { color: var(--primary); }
.main-nav .nav-link:hover::after { width: 100%; }
.main-nav .nav-link.active { color: var(--primary); font-weight: 600; }
.main-nav .nav-link.active::after { width: 100%; }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-search { position: relative; display: flex; align-items: center; }
.header-search input { width: 180px; height: 38px; border: 1px solid var(--border-light); border-radius: 38px; padding: 0 38px 0 16px; font-size: 14px; background: var(--bg-gray); transition: var(--transition); }
.header-search input:focus { width: 220px; border-color: var(--primary); background: var(--bg-white); box-shadow: var(--shadow-primary); }
.header-search i { position: absolute; right: 14px; color: var(--text-muted); font-size: 14px; pointer-events: none; }
.header-cta { height: 38px; padding: 0 20px; background: linear-gradient(135deg, var(--primary), #1e40af); color: #fff; font-size: 14px; font-weight: 600; border-radius: 38px; display: flex; align-items: center; gap: 6px; box-shadow: var(--shadow-primary); transition: var(--transition); }
.header-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(37, 99, 235, .32); color: #fff; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: var(--radius-sm); border: 1px solid var(--border-light); background: transparent; }

/* ===== Page Hero ===== */
.page-hero { position: relative; background: url('/assets/images/backpic/back-2.png') center/cover no-repeat; padding: 96px 0 80px; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(105deg, rgba(15, 23, 42, .82), rgba(37, 99, 235, .55)); }
.page-hero::after { content: ''; position: absolute; inset: 0; background: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffffff" fill-opacity="0.04"%3E%3Ccircle cx="30" cy="30" r="1.5"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E'); }
.page-hero .container { position: relative; z-index: 2; }
.hero-breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: rgba(255,255,255,.75); margin-bottom: 20px; }
.hero-breadcrumb a { color: rgba(255,255,255,.85); }
.hero-breadcrumb a:hover { color: #fff; }
.hero-breadcrumb i { font-size: 12px; }
.hero-title { font-size: 42px; line-height: 1.25; color: #fff; font-weight: 800; margin-bottom: 16px; letter-spacing: -.5px; }
.hero-title em { font-style: normal; background: linear-gradient(90deg, #93c5fd, #60a5fa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { max-width: 640px; color: rgba(255,255,255,.9); font-size: 16px; line-height: 1.8; margin-bottom: 30px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tag { display: inline-flex; align-items: center; gap: 6px; padding: 7px 16px; background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); border-radius: 30px; color: rgba(255,255,255,.95); font-size: 13px; backdrop-filter: blur(4px); }
.hero-tag i { color: #93c5fd; }
.hero-meta-row { display: flex; align-items: center; gap: 18px; margin-top: 32px; flex-wrap: wrap; }
.hero-meta-count { display: flex; align-items: center; gap: 10px; padding: 8px 18px; background: rgba(255,255,255,.1); border-radius: 30px; font-size: 14px; color: rgba(255,255,255,.9); backdrop-filter: blur(4px); }
.hero-meta-count i { color: #fbbf24; }

/* ===== Global Section ===== */
.section-block { padding: 80px 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--primary); background: var(--primary-soft); padding: 6px 16px; border-radius: 30px; margin-bottom: 12px; text-transform: uppercase; letter-spacing: .5px; }
.section-eyebrow i { font-size: 14px; }
.section-title { font-size: 32px; line-height: 1.3; font-weight: 800; color: var(--text-main); margin-bottom: 12px; letter-spacing: -.5px; }
.section-sub { color: var(--text-muted); font-size: 16px; line-height: 1.7; }

/* ===== Tutorial Category Cards ===== */
.tutorial-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.tutorial-card { background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border-light); padding: 28px 24px; transition: var(--transition); position: relative; overflow: hidden; }
.tutorial-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transform: scaleX(0); transform-origin: left; transition: transform .35s ease; }
.tutorial-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border-mid); }
.tutorial-card:hover::before { transform: scaleX(1); }
.tutorial-icon { width: 54px; height: 54px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 16px; color: #fff; }
.tutorial-icon.ti-blue { background: linear-gradient(135deg, #2563eb, #60a5fa); box-shadow: 0 8px 20px rgba(37, 99, 235, .25); }
.tutorial-icon.ti-green { background: linear-gradient(135deg, #059669, #34d399); box-shadow: 0 8px 20px rgba(16, 185, 129, .25); }
.tutorial-icon.ti-amber { background: linear-gradient(135deg, #d97706, #fbbf24); box-shadow: 0 8px 20px rgba(245, 158, 11, .25); }
.tutorial-icon.ti-purple { background: linear-gradient(135deg, #7c3aed, #a78bfa); box-shadow: 0 8px 20px rgba(124, 58, 237, .25); }
.tutorial-card h3 { font-size: 17px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.tutorial-card p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.tutorial-card .card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 13px; font-weight: 600; color: var(--primary); }
.tutorial-card .card-link:hover { gap: 10px; }
.tutorial-stats { text-align: center; padding-top: 48px; border-top: 1px solid var(--border-light); margin-top: 48px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.stat-item .stat-num { font-size: 36px; font-weight: 800; color: var(--text-main); letter-spacing: -1px; }
.stat-item .stat-num i { color: var(--primary); font-size: 26px; margin-right: 6px; }
.stat-item .stat-label { font-size: 14px; color: var(--text-muted); margin-top: 4px; }

/* ===== Step Guide ===== */
.guide-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; background: var(--bg-white); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-md); border: 1px solid var(--border-light); }
.guide-image { padding: 24px; background: var(--bg-gray); }
.guide-image img { border-radius: var(--radius-md); width: 100%; height: 360px; object-fit: cover; }
.guide-content { padding: 40px 40px 40px 0; }
.guide-content h3 { font-size: 24px; font-weight: 700; color: var(--text-main); margin-bottom: 10px; }
.guide-content > p { color: var(--text-muted); font-size: 15px; margin-bottom: 24px; }
.step-list { display: flex; flex-direction: column; gap: 0; }
.step-item { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border-light); }
.step-item:last-child { border-bottom: none; }
.step-num { width: 32px; height: 32px; min-width: 32px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-weight: 700; font-size: 14px; display: flex; align-items: center; justify-content: center; }
.step-item .step-body h4 { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 4px; }
.step-item .step-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== Feature Cards ===== */
.feature-inner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { background: var(--bg-white); border: 1px solid var(--border-light); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card-img { position: relative; height: 180px; overflow: hidden; }
.feature-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.feature-card:hover .feature-card-img img { transform: scale(1.06); }
.feature-card-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,23,42,.25), transparent); }
.feature-card-tag { position: absolute; top: 12px; left: 12px; z-index: 3; padding: 4px 12px; background: rgba(255,255,255,.9); backdrop-filter: blur(4px); border-radius: 20px; font-size: 12px; font-weight: 600; color: var(--primary); }
.feature-card-body { padding: 20px 24px 24px; }
.feature-card-body h3 { font-size: 17px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.feature-card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
.feature-card-body .meta-line { display: flex; align-items: center; gap: 14px; font-size: 12px; color: var(--text-light); }
.feature-card-body .meta-line i { color: var(--primary); }

/* ===== Video Gallery ===== */
.video-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.video-section .section-title { color: #fff; }
.video-section .section-sub { color: rgba(255,255,255,.7); }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card { border-radius: var(--radius-lg); overflow: hidden; position: relative; border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.06); transition: var(--transition); }
.video-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,.4); border-color: rgba(255,255,255,.25); }
.video-thumb { position: relative; height: 180px; overflow: hidden; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; opacity: .85; }
.video-play { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(15,23,42,.3); transition: var(--transition); }
.video-play i { width: 52px; height: 52px; border-radius: 50%; background: rgba(255,255,255,.2); backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; font-size: 18px; color: #fff; border: 1px solid rgba(255,255,255,.35); transition: var(--transition); }
.video-card:hover .video-play i { background: var(--primary); transform: scale(1.08); border-color: var(--primary); }
.video-info { padding: 16px 20px 20px; }
.video-info h4 { color: rgba(255,255,255,.9); font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.video-info .video-dur { color: rgba(255,255,255,.5); font-size: 13px; }

/* ===== Pro Tips ===== */
.tips-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.tip-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 24px 28px; border: 1px solid var(--border-light); display: flex; gap: 18px; transition: var(--transition); }
.tip-card:hover { box-shadow: var(--shadow-md); border-color: var(--border-mid); transform: translateY(-2px); }
.tip-card i { font-size: 22px; width: 44px; height: 44px; min-width: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; }
.tip-card .tip-body h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }
.tip-card .tip-body p { font-size: 14px; color: var(--text-muted); }
.tip-card.tip-blue i { background: var(--primary-soft); color: var(--primary); }
.tip-card.tip-green i { background: var(--success-soft); color: var(--success); }
.tip-card.tip-amber i { background: var(--accent-soft); color: var(--accent); }
.tip-card.tip-purple i { background: #f3e8ff; color: #7c3aed; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--bg-white); border: 1px solid var(--border-light); border-radius: var(--radius-md); margin-bottom: 12px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--border-mid); box-shadow: var(--shadow-sm); }
.faq-q { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-size: 15px; font-weight: 600; color: var(--text-main); transition: var(--transition); user-select: none; }
.faq-q i { color: var(--text-muted); font-size: 14px; transition: transform .3s ease; }
.faq-item.open .faq-q i { transform: rotate(180deg); color: var(--primary); }
.faq-a { display: none; padding: 0 24px 20px; font-size: 14px; line-height: 1.75; color: var(--text-muted); }
.faq-item.open .faq-a { display: block; }

/* ===== CTA ===== */
.cta-section { padding: 80px 0; background: linear-gradient(135deg, var(--bg-body), var(--primary-soft)); }
.cta-box { background: linear-gradient(135deg, var(--primary), #1e3a8a); border-radius: var(--radius-xl); padding: 56px 48px; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 32px; }
.cta-box::before { content: ''; position: absolute; top: -80px; right: -80px; width: 260px; height: 260px; border-radius: 50%; background: rgba(255,255,255,.08); }
.cta-box::after { content: ''; position: absolute; bottom: -60px; left: 40%; width: 200px; height: 200px; border-radius: 50%; background: rgba(255,255,255,.05); }
.cta-content { position: relative; z-index: 2; }
.cta-content h3 { color: #fff; font-size: 28px; font-weight: 800; margin-bottom: 8px; letter-spacing: -.3px; }
.cta-content p { color: rgba(255,255,255,.8); font-size: 15px; }
.cta-btn { position: relative; z-index: 2; display: inline-flex; align-items: center; gap: 10px; background: #fff; color: var(--primary); font-size: 15px; font-weight: 700; padding: 14px 30px; border-radius: 8px; box-shadow: 0 10px 30px rgba(0,0,0,.15); transition: var(--transition); }
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(0,0,0,.2); }

/* ===== Footer ===== */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,.7); padding: 64px 0 0; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: #fff; font-weight: 700; font-size: 18px; }
.footer-logo i { color: var(--primary-light); font-size: 22px; }
.footer-brand p { font-size: 14px; line-height: 1.7; max-width: 260px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255,255,255,.65); font-size: 14px; transition: var(--transition); }
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.contact-line { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; font-size: 14px; }
.contact-line i { width: 16px; color: var(--primary-light); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: 20px 0; font-size: 13px; color: rgba(255,255,255,.4); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .tutorial-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-inner-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-wrap { grid-template-columns: 1fr; }
  .guide-content { padding: 24px; }
  .tips-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-toggle { display: flex; }
  .header-search { display: none; }
  .header-cta { display: none; }
  .section-block { padding: 60px 0; }
  .hero-title { font-size: 32px; }
  .page-hero { padding: 70px 0 56px; }
  .tutorial-grid { grid-template-columns: 1fr; }
  .feature-inner-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .tutorial-stats { grid-template-columns: 1fr 1fr; }
  .cta-box { padding: 40px 28px; flex-direction: column; text-align: center; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 26px; }
  .section-title { font-size: 24px; }
  .tutorial-stats { grid-template-columns: 1fr; }
  .step-item { gap: 12px; }
  .tip-card { padding: 20px; }
  .faq-q { padding: 16px 18px; }
  .faq-a { padding: 0 18px 16px; }
}

/* ===== Mobile Menu ===== */
.mobile-menu { display: none; position: fixed; top: 0; right: -100%; width: 280px; height: 100vh; background: #fff; z-index: 1000; padding: 24px; box-shadow: -4px 0 30px rgba(0,0,0,.15); transition: right .4s ease; }
.mobile-menu.open { right: 0; }
.mobile-menu-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.mobile-menu-header .logo { font-size: 17px; }
.mobile-menu .mobile-nav-links { display: flex; flex-direction: column; gap: 6px; }
.mobile-menu .mobile-nav-links a { padding: 12px 14px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 500; color: var(--text-body); transition: var(--transition); }
.mobile-menu .mobile-nav-links a:hover { background: var(--primary-soft); color: var(--primary); }
.mobile-menu .mobile-nav-links a.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.mobile-menu-overlay { display: none; position: fixed; inset: 0; background: rgba(15,23,42,.4); z-index: 999; backdrop-filter: blur(2px); }
.mobile-menu-overlay.open { display: block; }

/* roulang page: article */
:root {
            --primary: #d42a3e;
            --primary-dark: #b91f30;
            --primary-light: #fff0f2;
            --secondary: #151a2e;
            --secondary-light: #2a3151;
            --accent: #f5a623;
            --bg: #f5f6fa;
            --bg-white: #ffffff;
            --text: #1d2129;
            --text-muted: #6b7280;
            --border: #e8e9ee;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.14);
            --transition: all 0.25s ease;
        }

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

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        input,
        textarea {
            font: inherit;
        }

        ::selection {
            background: rgba(212, 42, 62, 0.18);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(212, 42, 62, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: min(1200px, 92%);
            margin: 0 auto;
        }

        /* ========== 顶部导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 12px rgba(21, 26, 46, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            height: 72px;
            gap: 26px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(212, 42, 62, 0.32);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--secondary);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            min-width: 0;
        }

        .nav-link {
            position: relative;
            padding: 10px 18px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 10px;
            white-space: nowrap;
            transition: var(--transition);
        }

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

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 2px;
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 8px 16px;
            transition: var(--transition);
        }

        .search-box:focus-within {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(212, 42, 62, 0.12);
        }

        .search-box i {
            color: var(--text-muted);
            font-size: 14px;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 13px;
            width: 150px;
            color: var(--text);
        }

        .search-box input::placeholder {
            color: #aab0bc;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 700;
            line-height: 1.4;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            border: 1.5px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 6px 18px rgba(212, 42, 62, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(212, 42, 62, 0.35);
        }

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

        .btn-outline {
            border: 1.5px solid var(--border);
            background: #fff;
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 26px rgba(0, 0, 0, 0.2);
        }

        .btn-lg {
            padding: 14px 34px;
            font-size: 16px;
            border-radius: 14px;
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            border-radius: 10px;
        }

        /* ========== 标签徽章 ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }

        .badge-light {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.22);
            backdrop-filter: blur(8px);
        }

        .badge-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(8px);
        }

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

        /* ========== 文章首屏 Hero ========== */
        .article-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            min-height: 340px;
            display: flex;
            align-items: center;
            color: #fff;
        }

        .article-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(21, 26, 46, 0.92) 0%, rgba(21, 26, 46, 0.6) 55%, rgba(212, 42, 62, 0.25) 100%);
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
            padding: 44px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.85);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.45);
        }

        .article-hero h1 {
            font-size: clamp(26px, 4vw, 42px);
            line-height: 1.3;
            font-weight: 800;
            max-width: 780px;
            margin-bottom: 18px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }

        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-meta i {
            opacity: 0.7;
        }

        /* ========== 文章主体版块 ========== */
        .article-section {
            padding: 60px 0;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 340px;
            gap: 36px;
            align-items: start;
        }

        .article-main {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 48px;
            box-shadow: var(--shadow-sm);
        }

        .article-feature-image {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 28px;
        }

        .article-feature-image img {
            width: 100%;
            aspect-ratio: 16 / 8;
            object-fit: cover;
            border-radius: var(--radius);
        }

        /* ========== 正文排版 ========== */
        .article-content {
            color: var(--text);
        }

        .article-content > p:first-child {
            font-size: 17px;
            color: #444;
        }

        .article-content p {
            margin-bottom: 1.4em;
            font-size: 16px;
            line-height: 2;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 800;
            line-height: 1.4;
            margin: 1.6em 0 0.8em;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            color: var(--secondary);
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 1.4em 0 0.6em;
            color: var(--secondary);
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 700;
            margin: 1.2em 0 0.5em;
            color: var(--secondary);
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(212, 42, 62, 0.3);
        }

        .article-content a:hover {
            border-bottom-color: var(--primary);
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 24px 0;
        }

        .article-content ul {
            margin: 1em 0 1.4em;
        }

        .article-content ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 8px;
            line-height: 1.9;
        }

        .article-content ul li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 0.78em;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
        }

        .article-content ol {
            list-style: decimal;
            padding-left: 1.4em;
            margin: 1em 0 1.4em;
        }

        .article-content ol li {
            margin-bottom: 8px;
            line-height: 1.9;
        }

        .article-content blockquote {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            border-radius: var(--radius);
            padding: 18px 22px;
            margin: 24px 0;
            color: #5a5f6e;
        }

        .article-content blockquote p {
            margin-bottom: 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
        }

        .article-content th {
            background: var(--bg);
            font-weight: 700;
            color: var(--secondary);
        }

        .article-content code {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 14px;
            font-family: Consolas, monospace;
        }

        /* ========== 文章底部工具 ========== */
        .article-footer {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-bottom: 24px;
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .tag {
            display: inline-flex;
            padding: 6px 16px;
            background: var(--bg);
            border-radius: 8px;
            font-size: 13px;
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: rgba(212, 42, 62, 0.2);
        }

        .article-toolbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-muted);
            transition: var(--transition);
        }

        .share-btn:hover {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 14px rgba(212, 42, 62, 0.28);
        }

        /* ========== 侧边栏 ========== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 92px;
        }

        .side-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 26px;
            box-shadow: var(--shadow-sm);
        }

        .side-card-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 18px;
            color: var(--secondary);
        }

        .side-card-title i {
            color: var(--primary);
        }

        .side-card-title::after {
            content: "";
            flex: 1;
            height: 1px;
            background: var(--border);
        }

        .side-list li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border);
        }

        .side-list li:last-child {
            border-bottom: none;
        }

        .side-list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
        }

        .side-list-index {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 1px;
        }

        .side-list li:nth-child(-n+3) .side-list-index {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 3px 8px rgba(212, 42, 62, 0.3);
        }

        .side-list-text {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 0;
        }

        .side-title {
            font-size: 14px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .side-list a:hover .side-title {
            color: var(--primary);
        }

        .side-date {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .side-cats li {
            border-radius: 10px;
            overflow: hidden;
        }

        .side-cats a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 10px;
            color: var(--text);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }

        .side-cats a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 18px;
        }

        .side-cats i {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            background: var(--bg);
            color: var(--primary);
            font-size: 14px;
            transition: var(--transition);
        }

        .side-cats a:hover i {
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .side-cta {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 55%, #8c2730 130%);
            color: #fff;
            text-align: center;
            padding: 34px 26px;
            border: none;
        }

        .side-cta > i {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 14px;
            display: block;
        }

        .side-cta h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 10px;
        }

        .side-cta p {
            font-size: 13px;
            line-height: 1.7;
            opacity: 0.8;
            margin-bottom: 22px;
        }

        .side-cta .btn {
            width: 100%;
        }

        /* ========== 未找到 ========== */
        .not-found {
            text-align: center;
            padding: 70px 20px;
        }

        .not-found-icon {
            width: 92px;
            height: 92px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 36px;
            color: var(--primary);
        }

        .not-found h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .not-found p {
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .not-found .btn {
            margin-top: 22px;
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            padding: 20px 0 60px;
        }

        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 30px;
        }

        .section-title {
            position: relative;
            font-size: 24px;
            font-weight: 800;
            color: var(--secondary);
            padding-left: 16px;
        }

        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
        }

        .section-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 10px;
            background: var(--primary-light);
            transition: var(--transition);
            white-space: nowrap;
        }

        .section-link:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .card-post {
            display: block;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

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

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

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

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

        .card-post-body {
            padding: 20px;
        }

        .card-post-title {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.55;
            margin-bottom: 10px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition);
        }

        .card-post:hover .card-post-title {
            color: var(--primary);
        }

        .card-post-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .card-post-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .card-post-meta i {
            margin-right: 4px;
        }

        .empty-text {
            grid-column: 1 / -1;
            text-align: center;
            color: var(--text-muted);
            padding: 40px 0;
            font-size: 15px;
        }

        /* ========== CTA 版块 ========== */
        .cta-section {
            position: relative;
            padding: 64px 0;
            background: linear-gradient(120deg, var(--secondary) 0%, var(--secondary-light) 100%);
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(212, 42, 62, 0.5), transparent 70%);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -100px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 166, 35, 0.25), transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 15px;
            margin-bottom: 28px;
        }

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

        .cta-section .btn-outline {
            border-color: rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }

        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: #fff;
            color: #fff;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--secondary);
            color: #d5d8e5;
            padding: 60px 0 20px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo i {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(212, 42, 62, 0.3);
        }

        .footer-logo span {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }

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

        .contact-line {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 12px;
        }

        .contact-line i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========== 响应式断点 ========== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: minmax(0, 1fr) 300px;
                gap: 24px;
            }

            .article-main {
                padding: 36px 28px;
            }

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

        @media (max-width: 860px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .side-cta {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 12px 0;
                row-gap: 10px;
            }

            .main-nav {
                order: 3;
                width: 100%;
                display: flex;
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                justify-content: flex-start;
                gap: 4px;
                padding-bottom: 2px;
            }

            .main-nav::-webkit-scrollbar {
                height: 3px;
            }

            .main-nav::-webkit-scrollbar-thumb {
                background: var(--border);
                border-radius: 3px;
            }

            .nav-link {
                flex-shrink: 0;
                padding: 8px 14px;
                font-size: 14px;
            }

            .nav-link.active::after {
                bottom: 0;
            }

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

            .search-box input {
                width: 110px;
            }

            .article-hero {
                min-height: 260px;
            }

            .article-hero h1 {
                font-size: 26px;
            }

            .article-section {
                padding: 40px 0;
            }

            .article-main {
                padding: 24px 20px;
                border-radius: 16px;
            }

            .article-content p {
                font-size: 15px;
            }

            .cta-section {
                padding: 50px 0;
            }

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

        @media (max-width: 520px) {
            .header-right .search-box {
                display: none;
            }

            .header-right .btn-sm {
                padding: 7px 12px;
                font-size: 13px;
            }

            .brand-text {
                font-size: 17px;
            }

            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .hero-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-hero {
                min-height: 230px;
            }

            .article-hero h1 {
                font-size: 22px;
            }

            .article-main {
                padding: 20px 16px;
            }

            .article-content h2 {
                font-size: 20px;
            }

            .article-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .side-cta {
                grid-column: auto;
            }

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

            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .cta-buttons {
                flex-direction: column;
                width: 100%;
            }

            .cta-buttons .btn {
                width: 100%;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                line-height: 1.8;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --bg-deep: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --spacing: 80px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease;
}

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

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo i {
  font-size: 28px;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo span {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}

.main-nav .nav-link {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  transition: all 0.25s ease;
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.search-box {
  position: relative;
  width: 200px;
}

.search-box input {
  width: 100%;
  height: 38px;
  padding: 0 36px 0 16px;
  border-radius: 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text);
  transition: all 0.3s ease;
}

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

.search-box input:focus {
  border-color: var(--primary);
  background: var(--bg-white);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box i {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  color: var(--text-light);
  pointer-events: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 22px;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  transition: all 0.3s ease;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.4;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.btn-light {
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
}

.btn-light:hover {
  background: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.15);
}

.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
  height: 38px;
}

.btn-lg {
  padding: 16px 44px;
  font-size: 17px;
  border-radius: 28px;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
}

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

/* ---------- Page Banner ---------- */
.page-banner {
  position: relative;
  padding: 110px 0 90px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.75) 100%);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 18px;
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb i {
  font-size: 12px;
}

.page-banner h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.page-banner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin-bottom: 30px;
  line-height: 1.7;
}

.banner-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.banner-meta {
  display: flex;
  gap: 24px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  flex-wrap: wrap;
}

.banner-meta span {
  display: flex;
  align-items: center;
  gap: 8px;
}

.banner-meta i {
  color: var(--accent);
}

/* ---------- Section ---------- */
.section {
  padding: var(--spacing) 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head .tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 12px;
}

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

/* ---------- Filter Bar ---------- */
.filter-section {
  padding: 0;
  margin-top: -45px;
  position: relative;
  z-index: 5;
}

.filter-bar {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 20px 28px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  border: 1px solid var(--border);
}

.filter-tag {
  padding: 9px 22px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  background: transparent;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.filter-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.filter-tag.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

/* ---------- News Grid ---------- */
.news-section {
  background: var(--bg);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s ease;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.news-card-img {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

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

.news-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, 0.4));
}

.news-card-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 16px;
  backdrop-filter: blur(4px);
  box-shadow: var(--shadow-sm);
}

.news-card-body {
  padding: 24px;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 10px;
}

.news-card-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.news-card-meta i {
  font-size: 12px;
  color: var(--accent);
}

.news-card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 10px;
  transition: color 0.25s ease;
}

.news-card-title:hover {
  color: var(--primary);
}

.news-card-excerpt {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.3s ease;
}

.news-card-link:hover {
  gap: 10px;
  color: var(--primary-dark);
}

/* ---------- Timeline ---------- */
.timeline-section {
  background: var(--bg-white);
  border-top: 1px solid var(--border);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-light), var(--border), var(--primary-light));
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-white);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 5px var(--primary-light);
  z-index: 2;
}

.timeline-dot.accent {
  border-color: var(--accent);
  box-shadow: 0 0 0 5px rgba(245, 158, 11, 0.2);
}

.timeline-content {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 24px 28px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}

.timeline-content:hover {
  box-shadow: var(--shadow);
  transform: translateX(4px);
  border-color: var(--primary-light);
}

.timeline-version {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 16px;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.timeline-date {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.timeline-date i {
  font-size: 12px;
  color: var(--accent);
}

.timeline-content h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 12px;
}

.timeline-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
}

.badge.gold {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-dark);
}

.badge.green {
  background: rgba(16, 185, 129, 0.12);
  color: #059669;
}

/* ---------- Rank List ---------- */
.rank-section {
  background: var(--bg);
}

.rank-wrap {
  max-width: 860px;
  margin: 0 auto;
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

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

.rank-item:hover {
  background: var(--bg);
}

.rank-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--border);
  width: 40px;
  text-align: center;
  flex-shrink: 0;
  font-style: italic;
}

.rank-item:nth-child(1) .rank-num {
  color: var(--accent);
}

.rank-item:nth-child(2) .rank-num {
  color: var(--accent);
}

.rank-item:nth-child(3) .rank-num {
  color: var(--accent);
}

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

.rank-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 3px;
  transition: color 0.25s ease;
}

.rank-info h3:hover {
  color: var(--primary);
}

.rank-info p {
  font-size: 13px;
  color: var(--text-light);
}

.rank-view {
  font-size: 13px;
  color: var(--text-light);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.rank-view i {
  color: var(--accent);
  font-size: 12px;
}

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

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

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

.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: all 0.3s ease;
}

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

.faq-question .icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

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

.faq-answer {
  display: none;
  padding: 0 26px 22px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- CTA ---------- */
.cta-section {
  position: relative;
  padding: 90px 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.92), rgba(15, 23, 42, 0.85));
}

.cta-section .container {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

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

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

.cta-section .btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 8px 20px rgba(245, 158, 11, 0.4);
}

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

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo i {
  font-size: 26px;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-logo span {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: all 0.3s ease;
}

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

.contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}

.contact-line i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .header-inner {
    gap: 16px;
  }

  .search-box {
    width: 150px;
  }

  .main-nav .nav-link {
    padding: 8px 12px;
    font-size: 14px;
  }

  .news-grid {
    gap: 20px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing: 56px;
  }

  .header-inner {
    height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: var(--shadow);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.35s ease;
    pointer-events: none;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav .nav-link {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: 12px;
  }

  .header-actions .search-box {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .brand-logo span {
    font-size: 18px;
  }

  .page-banner {
    padding: 80px 0 65px;
  }

  .page-banner h1 {
    font-size: 32px;
  }

  .page-banner p {
    font-size: 15px;
  }

  .section-head h2 {
    font-size: 26px;
  }

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

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

  .news-card-img {
    height: 200px;
  }

  .filter-section {
    margin-top: -30px;
  }

  .filter-bar {
    padding: 16px 20px;
    gap: 8px;
  }

  .filter-tag {
    padding: 7px 14px;
    font-size: 13px;
  }

  .timeline-item {
    padding-left: 50px;
  }

  .timeline::before {
    left: 15px;
  }

  .timeline-dot {
    left: 8px;
  }

  .rank-item {
    padding: 16px 18px;
    gap: 14px;
  }

  .rank-num {
    font-size: 18px;
    width: 32px;
  }

  .rank-info h3 {
    font-size: 14px;
  }

  .rank-view {
    font-size: 12px;
  }

  .cta-section h2 {
    font-size: 28px;
  }

  .cta-section p {
    font-size: 15px;
  }

  .btn-lg {
    padding: 14px 36px;
    font-size: 16px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 36px;
  }

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

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

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

  .brand-logo i {
    font-size: 24px;
    width: 36px;
    height: 36px;
  }

  .brand-logo span {
    font-size: 17px;
  }

  .page-banner {
    padding: 65px 0 55px;
  }

  .page-banner h1 {
    font-size: 27px;
  }

  .page-banner p {
    font-size: 14px;
  }

  .banner-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .banner-actions .btn {
    width: 100%;
  }

  .banner-meta {
    flex-direction: column;
    gap: 10px;
  }

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

  .news-card-body {
    padding: 18px;
  }

  .news-card-title {
    font-size: 17px;
  }

  .timeline-content {
    padding: 18px;
  }

  .timeline-item {
    padding-left: 44px;
  }

  .rank-item {
    flex-wrap: wrap;
  }

  .rank-view {
    width: 100%;
    padding-left: 52px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 20px 18px;
  }

  .cta-section {
    padding: 65px 0;
  }

  .cta-section h2 {
    font-size: 25px;
  }
}