/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0d1b2a;
  --primary-light: #1b2d45;
  --primary-dark: #070f1a;
  --accent: #e8491d;
  --accent-hover: #d13d15;
  --accent-light: #fce8e2;
  --gold: #f5a623;
  --gold-light: #fef3d5;
  --text: #1a1a2e;
  --text-light: #5a5a7a;
  --text-white: #f5f5f7;
  --bg: #f7f8fc;
  --bg-card: #ffffff;
  --bg-dark: #0d1b2a;
  --bg-dark-alt: #13243a;
  --border: #e2e6ef;
  --border-light: #f0f2f7;
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.10);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --radius-full: 60px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 32px;
  --space-lg: 60px;
  --space-xl: 100px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --max-width: 1200px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-lg) 0; }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-dark h2, .section-dark h3, .section-dark .text-muted { color: var(--text-white); }
.section-dark .text-muted { opacity: 0.75; }
.text-center { text-align: center; }
.text-muted { color: var(--text-light); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ===== 顶部信息条 ===== */
.topbar {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.7);
  font-size: 0.82rem;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px 16px;
}
.topbar a { color: rgba(255,255,255,0.8); }
.topbar a:hover { color: var(--gold); }
.topbar .domain { letter-spacing: 0.3px; }
.topbar .topbar-right { display: flex; align-items: center; gap: 18px; }
.topbar .topbar-right i { margin-right: 4px; }

/* ===== 导航 ===== */
.main-header {
  background: var(--bg-card);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 16px rgba(0,0,0,0.04);
  border-bottom: 1px solid var(--border);
}
.main-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo i { color: var(--accent); font-size: 1.6rem; }
.logo span { background: linear-gradient(135deg, var(--primary) 40%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.logo:hover span { -webkit-text-fill-color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 500;
  font-size: 0.92rem;
  position: relative;
  transition: var(--transition);
}
.nav-links a:hover { background: var(--accent-light); color: var(--accent); }
.nav-links a.active { background: var(--accent); color: #fff; }
.nav-links a i { margin-right: 6px; font-size: 0.85em; }
.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 8px 22px;
  border-radius: var(--radius-full);
  font-weight: 600;
}
.nav-cta:hover { background: var(--accent-hover); transform: translateY(-1px); }
.menu-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--text); cursor: pointer; padding: 4px; }

/* ===== Hero 首屏 ===== */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  background-image: linear-gradient(135deg, rgba(13,27,42,0.92) 0%, rgba(19,36,58,0.88) 100%), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(transparent, var(--bg));
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero-content { max-width: 780px; }
.hero-content h1 { color: #fff; font-weight: 800; line-height: 1.15; margin-bottom: 20px; }
.hero-content h1 .highlight { color: var(--gold); }
.hero-content p { color: rgba(255,255,255,0.8); font-size: 1.2rem; max-width: 640px; margin-bottom: 32px; line-height: 1.7; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  color: var(--gold);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-badge i { font-size: 0.9rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  color: var(--text);
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 18px rgba(232,73,29,0.35); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232,73,29,0.45); }
.btn-outline-light { border: 2px solid rgba(255,255,255,0.3); color: #fff; background: transparent; }
.btn-outline-light:hover { border-color: var(--gold); color: var(--gold); transform: translateY(-2px); }
.btn-ghost { color: var(--text-light); background: transparent; padding: 8px 16px; }
.btn-ghost:hover { background: var(--border-light); }
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px 48px;
  margin-top: 44px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero-stat { }
.hero-stat .num { font-size: 1.8rem; font-weight: 800; color: #fff; }
.hero-stat .num .accent-num { color: var(--gold); }
.hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 2px; }

/* ===== 板块通用 ===== */
.section-title {
  margin-bottom: 12px;
  font-weight: 800;
}
.section-subtitle {
  color: var(--text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 40px;
}
.section-dark .section-subtitle { color: rgba(255,255,255,0.6); }

/* ===== 核心优势 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--border); }
.feature-card .icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 18px; }
.feature-card .icon.accent { background: var(--accent-light); color: var(--accent); }
.feature-card .icon.gold { background: var(--gold-light); color: var(--gold); }
.feature-card .icon.primary { background: #e0e7f0; color: var(--primary); }
.feature-card h3 { margin-bottom: 8px; font-size: 1.15rem; }
.feature-card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.6; margin-bottom: 0; }

/* ===== 分类入口 ===== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}
.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition);
  cursor: pointer;
}
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.category-card .cat-img { height: 180px; background-size: cover; background-position: center; position: relative; }
.category-card .cat-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(transparent 40%, rgba(13,27,42,0.7)); }
.category-card .cat-body { padding: 20px 24px 24px; }
.category-card .cat-body h3 { font-size: 1.15rem; margin-bottom: 4px; }
.category-card .cat-body p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 12px; }
.category-card .cat-tag { display: inline-block; background: var(--accent-light); color: var(--accent); font-size: 0.75rem; font-weight: 600; padding: 2px 12px; border-radius: var(--radius-full); }

/* ===== 流程步骤 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  position: relative;
  transition: var(--transition);
}
.step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.step-card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 32px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(232,73,29,0.3);
}
.step-card .icon { font-size: 2rem; margin-bottom: 14px; margin-top: 8px; color: var(--accent); }
.step-card h4 { margin-bottom: 6px; font-size: 1.05rem; }
.step-card p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 0; }

/* ===== 最新资讯列表 ===== */
.post-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
.post-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.post-card .post-img { height: 180px; background-size: cover; background-position: center; }
.post-card .post-body { padding: 20px 22px 22px; }
.post-card .post-cat { display: inline-block; background: var(--accent-light); color: var(--accent); font-size: 0.72rem; font-weight: 600; padding: 2px 12px; border-radius: var(--radius-full); margin-bottom: 10px; }
.post-card .post-body h3 { font-size: 1.05rem; margin-bottom: 6px; line-height: 1.4; }
.post-card .post-body h3 a { color: var(--text); }
.post-card .post-body h3 a:hover { color: var(--accent); }
.post-card .post-body p { font-size: 0.88rem; color: var(--text-light); margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card .post-meta { font-size: 0.78rem; color: var(--text-light); display: flex; gap: 16px; }
.post-card .post-meta i { margin-right: 4px; }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--text-light); background: var(--bg-card); border-radius: var(--radius); border: 1px dashed var(--border); }

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px;
}
.stat-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  transition: var(--transition);
}
.stat-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }
.stat-card .num { font-size: 2.2rem; font-weight: 800; color: var(--gold); line-height: 1.2; }
.stat-card .num span { font-size: 1rem; font-weight: 400; opacity: 0.6; }
.stat-card .label { font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-top: 6px; }
.stat-card .icon { font-size: 1.6rem; color: var(--gold); margin-bottom: 12px; opacity: 0.8; }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--border); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  gap: 12px;
  transition: var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question i { color: var(--accent); font-size: 1.1rem; transition: var(--transition); flex-shrink: 0; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px 18px;
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.7;
  display: none;
}
.faq-item.active .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-content { position: relative; z-index: 2; text-align: center; padding: 40px 0; }
.cta-content h2 { color: #fff; margin-bottom: 14px; }
.cta-content p { color: rgba(255,255,255,0.75); font-size: 1.05rem; max-width: 560px; margin: 0 auto 28px; }
.cta-content .btn { margin: 0 6px; }

/* ===== 页脚 ===== */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.65);
  padding: 48px 0 28px;
  border-top: 1px solid rgba(255,255,255,0.05);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 36px;
}
.footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 12px; }
.footer-brand .logo i { color: var(--gold); }
.footer-brand .logo span { background: linear-gradient(135deg, #fff 40%, var(--gold) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 320px; }
.footer h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
.footer ul li { margin-bottom: 8px; }
.footer ul li a { color: rgba(255,255,255,0.55); font-size: 0.88rem; }
.footer ul li a:hover { color: var(--gold); }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a { width: 38px; height: 38px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); font-size: 1rem; transition: var(--transition); }
.footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 0.82rem; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--gold); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero { min-height: 70vh; }
}

@media (max-width: 768px) {
  .main-header .container { height: 60px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 16px 24px; box-shadow: 0 8px 24px rgba(0,0,0,0.06); gap: 2px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 16px; width: 100%; border-radius: var(--radius-sm); }
  .nav-links a.nav-cta { text-align: center; }
  .menu-toggle { display: block; }
  .hero { min-height: 60vh; }
  .hero-content h1 { font-size: clamp(1.8rem, 8vw, 2.6rem); }
  .hero-content p { font-size: 1rem; }
  .hero-stats { gap: 20px 32px; }
  .hero-stat .num { font-size: 1.4rem; }
  .features-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr 1fr; }
  .post-list { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 40px 0; }
  .cta-content .btn { width: 100%; max-width: 300px; margin: 6px auto; }
}

@media (max-width: 520px) {
  .topbar { font-size: 0.72rem; }
  .topbar .topbar-right { gap: 10px; }
  .hero { min-height: 50vh; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .container { padding: 0 16px; }
  .feature-card { padding: 24px 20px; }
  .post-card .post-body { padding: 16px 18px; }
  .faq-question { padding: 14px 16px; font-size: 0.9rem; }
  .faq-answer { padding: 0 16px 14px; }
}

/* ===== 工具类 ===== */
.text-accent { color: var(--accent); }
.text-gold { color: var(--gold); }
.bg-white { background: var(--bg-card); }
.bg-light { background: var(--bg); }
.rounded-full { border-radius: var(--radius-full); }
.shadow-sm { box-shadow: var(--shadow); }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a8a;
            --primary-light: #2a5bd7;
            --primary-dark: #0f2460;
            --accent: #f5a623;
            --accent-light: #ffc247;
            --accent-dark: #d48b1a;
            --bg: #f8fafc;
            --bg-alt: #ffffff;
            --bg-dark: #0b1428;
            --text: #1a1f36;
            --text-light: #5a6178;
            --text-muted: #8e94a7;
            --border: #e2e6ef;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(26, 58, 138, 0.08);
            --shadow-lg: 0 12px 48px rgba(26, 58, 138, 0.12);
            --shadow-hover: 0 16px 56px rgba(26, 58, 138, 0.18);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 76px;
            --topbar-height: 40px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.4rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        p {
            margin-bottom: 1em;
            color: var(--text-light);
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Top Bar ===== */
        .topbar {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.82rem;
            height: var(--topbar-height);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .topbar a {
            color: rgba(255, 255, 255, 0.8);
            margin-left: 20px;
            font-size: 0.82rem;
        }
        .topbar a:hover {
            color: #fff;
        }
        .topbar .highlight {
            color: var(--accent-light);
            font-weight: 600;
        }

        /* ===== Header / Nav ===== */
        .header {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--accent);
            background: rgba(245, 166, 35, 0.12);
            padding: 8px;
            border-radius: 12px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a i {
            margin-right: 6px;
            font-size: 0.85rem;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 58, 138, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 58, 138, 0.10);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-links a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: var(--radius-xs);
            font-weight: 600;
        }
        .nav-links a.nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(26, 58, 138, 0.25);
        }
        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        /* ===== Article Page ===== */
        .article-banner {
            background: var(--bg-dark);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 20, 40, 0.92), rgba(26, 58, 138, 0.70));
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-banner .breadcrumb {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .article-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .article-banner .breadcrumb a:hover {
            color: #fff;
        }
        .article-banner .breadcrumb span {
            color: var(--accent-light);
        }
        .article-banner h1 {
            color: #fff;
            font-size: 2.6rem;
            max-width: 800px;
            margin: 0 auto 16px;
            line-height: 1.3;
        }
        .article-banner .article-meta {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }
        .article-banner .article-meta i {
            margin-right: 6px;
            color: var(--accent-light);
        }
        .article-banner .article-meta .category-tag {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 2px 16px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.85rem;
        }

        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 48px 40px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-content .content-body p {
            margin-bottom: 1.4em;
            color: var(--text-light);
        }
        .article-content .content-body h2,
        .article-content .content-body h3 {
            margin-top: 2em;
            margin-bottom: 0.8em;
            color: var(--text);
        }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
            color: var(--text-light);
        }
        .article-content .content-body ul li,
        .article-content .content-body ol li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-content .content-body ol li {
            list-style: decimal;
        }
        .article-content .content-body img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow);
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(245, 166, 35, 0.06);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content .content-body a {
            color: var(--primary-light);
            text-decoration: underline;
        }
        .article-content .content-body a:hover {
            color: var(--primary-dark);
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .sidebar-card h4 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
        }
        .sidebar-card h4 i {
            color: var(--accent);
        }
        .sidebar-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-card ul li:last-child {
            border-bottom: none;
        }
        .sidebar-card ul li a {
            color: var(--text-light);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .sidebar-card ul li a i {
            font-size: 0.75rem;
            color: var(--accent);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            text-align: center;
            padding: 32px 24px;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
        }
        .sidebar-cta h4 {
            color: #fff;
            border-bottom: none;
            justify-content: center;
            font-size: 1.2rem;
        }
        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            margin: 12px 0 20px;
        }
        .sidebar-cta .btn {
            background: var(--accent);
            color: var(--primary-dark);
            padding: 12px 32px;
            border-radius: var(--radius-xs);
            font-weight: 700;
            display: inline-block;
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, 0.35);
        }

        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--bg-alt);
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            max-width: 48%;
        }
        .article-nav a:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            box-shadow: var(--shadow);
        }
        .article-nav a i {
            font-size: 1.1rem;
            color: var(--accent);
        }
        .article-nav a .direction {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: block;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg);
            border-top: 1px solid var(--border);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 {
            font-size: 1.8rem;
            color: var(--text);
        }
        .related-section .section-title p {
            color: var(--text-muted);
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .cat-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
        }
        .related-card .card-body {
            padding: 20px 20px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .related-card .card-body h3 a {
            color: var(--text);
        }
        .related-card .card-body h3 a:hover {
            color: var(--primary);
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .card-body .meta i {
            margin-right: 4px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            color: var(--text);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn {
            background: var(--primary);
            color: #fff;
            padding: 12px 36px;
            border-radius: var(--radius-xs);
            font-weight: 600;
            display: inline-block;
            transition: var(--transition);
        }
        .not-found-box .btn:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 58, 138, 0.25);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        .footer .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            background: rgba(245, 166, 35, 0.15);
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, #fff, #c0c8e0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer ul li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .topbar {
                display: none;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-alt);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 6px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-xs);
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.nav-cta {
                text-align: center;
                margin-top: 6px;
            }
            .nav-toggle {
                display: block;
            }
            .article-banner {
                padding: 60px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.7rem;
            }
            .article-content {
                padding: 24px 18px;
            }
            .article-content .content-body {
                font-size: 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-banner h1 {
                font-size: 1.4rem;
            }
            .article-banner .article-meta {
                gap: 12px;
                font-size: 0.85rem;
                flex-direction: column;
                align-items: center;
            }
            .article-nav {
                flex-direction: column;
            }
            .article-nav a {
                max-width: 100%;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.3rem;
                padding: 6px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #0f3a8e;
            --primary-light: #3b82f6;
            --secondary: #06b6d4;
            --accent: #f59e0b;
            --bg-dark: #0b1120;
            --bg-section: #f8fafc;
            --bg-card: #ffffff;
            --bg-muted: #f1f5f9;
            --text-main: #1e293b;
            --text-light: #64748b;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container: 1240px;
            --gap: 32px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: #ffffff;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-main);
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 顶部信息条 ===== */
        .top-bar {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .top-bar a {
            color: rgba(255, 255, 255, 0.8);
        }
        .top-bar a:hover {
            color: #fff;
        }
        .top-bar .domain-badge {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .top-bar .domain-badge i {
            color: var(--secondary);
        }
        .top-bar .top-actions {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .top-bar .top-actions a {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .top-bar .top-actions a i {
            font-size: 12px;
        }

        /* ===== 主导航 ===== */
        .header {
            background: #ffffff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            cursor: pointer;
            user-select: none;
        }
        .logo i {
            font-size: 28px;
            color: var(--secondary);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a i {
            margin-right: 6px;
            font-size: 14px;
        }
        .nav-links a:hover {
            background: var(--bg-muted);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }
        .nav-links a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50px;
            padding: 8px 24px;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.25);
        }
        .nav-links a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.35);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 28px;
            color: var(--text-main);
            cursor: pointer;
            padding: 4px 8px;
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Hero / 分类页首屏 ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: var(--text-white);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 17, 32, 0.88) 0%, rgba(11, 17, 32, 0.72) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
        }
        .category-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .category-hero .breadcrumb a:hover {
            color: #fff;
        }
        .category-hero .breadcrumb i {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            max-width: 800px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 i {
            color: var(--secondary);
            margin-right: 12px;
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .category-hero .hero-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .category-hero .hero-tags span i {
            color: var(--secondary);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .section-header h2 i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .section-header .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.1), rgba(6, 182, 212, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .card p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            margin-top: 16px;
            padding: 4px 14px;
            border-radius: 50px;
            background: var(--bg-muted);
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
        }
        .section-dark .card {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(4px);
        }
        .section-dark .card h3 {
            color: #fff;
        }
        .section-dark .card p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .card .card-icon {
            background: rgba(255, 255, 255, 0.1);
            color: var(--secondary);
        }
        .section-dark .card .card-tag {
            background: rgba(255, 255, 255, 0.12);
            color: var(--secondary);
        }

        /* ===== 步骤 / 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 4px 16px rgba(26, 86, 219, 0.25);
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .step-card .step-arrow {
            position: absolute;
            top: 50%;
            right: -22px;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--primary-light);
            opacity: 0.4;
        }
        .steps-grid .step-card:last-child .step-arrow {
            display: none;
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .media-block.reverse {
            direction: rtl;
        }
        .media-block.reverse>* {
            direction: ltr;
        }
        .media-block .media-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .media-block .media-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            display: block;
        }
        .media-block .media-content h3 {
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 20px;
            letter-spacing: -0.3px;
        }
        .media-block .media-content p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .media-block .media-content .feature-list {
            margin-top: 20px;
        }
        .media-block .media-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .media-block .media-content .feature-list li i {
            color: var(--secondary);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg-card);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item summary {
            padding: 20px 28px;
            font-size: 17px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            list-style: none;
            color: var(--text-main);
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item[open] summary {
            color: var(--primary);
            border-bottom: 1px solid var(--border);
        }
        .faq-item .faq-answer {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }
        .faq-item .faq-answer p {
            margin-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius);
            padding: 64px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-block .container {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-block p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.9);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-block .cta-btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-block .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 17px;
            font-weight: 700;
            background: #fff;
            color: var(--primary);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
        }
        .cta-block .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark);
        }
        .cta-block .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 17px;
            font-weight: 700;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            cursor: pointer;
            transition: var(--transition);
        }
        .cta-block .btn-cta-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 20px;
        }
        .footer .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }
        .footer .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            font-size: 18px;
        }
        .footer .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .footer ul li {
            margin-bottom: 12px;
            font-size: 14px;
        }
        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer ul li i {
            color: var(--secondary);
            width: 18px;
        }
        .footer .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-card:nth-child(2) .step-arrow {
                display: none;
            }
            .media-block {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .media-block.reverse {
                direction: ltr;
            }
            .media-block .media-image img {
                height: 300px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .category-hero h1 {
                font-size: 38px;
            }
            .section-header h2 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 18px;
                border-radius: var(--radius-xs);
            }
            .nav-links a.nav-cta {
                border-radius: var(--radius-xs);
                text-align: center;
            }
            .nav-toggle {
                display: block;
            }
            .top-bar .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                font-size: 12px;
            }
            .top-bar .top-actions {
                gap: 12px;
                flex-wrap: wrap;
            }
            .category-hero {
                padding: 60px 0 50px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .category-hero .hero-tags span {
                font-size: 12px;
                padding: 6px 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header .section-subtitle {
                font-size: 15px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card {
                padding: 24px 20px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-card .step-arrow {
                display: none !important;
            }
            .media-block .media-image img {
                height: 220px;
            }
            .media-block .media-content h3 {
                font-size: 22px;
            }
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 24px;
            }
            .cta-block p {
                font-size: 15px;
            }
            .cta-block .btn-cta,
            .cta-block .btn-cta-outline {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-item summary {
                padding: 16px 20px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 20px 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero p {
                font-size: 14px;
            }
            .card-grid {
                gap: 16px;
            }
            .steps-grid {
                gap: 16px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 22px;
            }
            .nav-links a {
                font-size: 14px;
                padding: 10px 14px;
            }
        }