/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #00f0ff;
  --primary-dark: #00c4d4;
  --primary-glow: rgba(0, 240, 255, 0.25);
  --secondary: #7b2ffc;
  --secondary-dark: #6222d6;
  --secondary-glow: rgba(123, 47, 252, 0.25);
  --accent: #f59e0b;
  --bg-dark: #0a0e17;
  --bg-card: #111827;
  --bg-elevated: #1a2332;
  --bg-nav: #0d111c;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: #1e293b;
  --border-light: #334155;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(0,240,255,0.1);
  --shadow-glow-secondary: 0 0 40px rgba(123,47,252,0.12);
  --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: 1200px;
  --header-h: 72px;
}
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-dark);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; border: none; }
button { cursor: pointer; background: none; }
ul, ol { list-style: none; }
::selection { background: var(--primary); color: var(--bg-dark); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
/* ===== 容器 ===== */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 880px; }
/* ===== 排版 ===== */
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--primary); margin-bottom: 12px;
}
.section-label::before { content: ''; width: 28px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-title { margin-bottom: 12px; }
.section-desc { color: var(--text-secondary); max-width: 640px; font-size: 1.05rem; line-height: 1.7; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
/* ===== Header / 导航 ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(13, 17, 28, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.header.scrolled { background: rgba(13, 17, 28, 0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.5); border-bottom-color: var(--border-light); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.6rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.02em; }
.logo:hover { color: var(--primary); }
.logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--primary), var(--secondary)); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; color: #fff; font-weight: 700; }
.logo span { color: var(--primary); }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a {
  position: relative; display: flex; align-items: center; gap: 6px;
  padding: 8px 18px; border-radius: 8px;
  font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
  transition: var(--transition);
}
.nav a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.nav a.active {
  color: var(--primary);
  background: rgba(0, 240, 255, 0.08);
  box-shadow: inset 0 -2px 0 var(--primary), 0 0 20px rgba(0,240,255,0.08);
}
.nav a.active i { color: var(--primary); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 22px; border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff !important; font-weight: 600; font-size: 0.9rem;
  transition: var(--transition); box-shadow: 0 0 20px rgba(0,240,255,0.15);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,240,255,0.3); color: #fff !important; background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark)); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
/* 移动端导航 */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav { position: fixed; top: var(--header-h); left: 0; right: 0; background: rgba(13,17,28,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--border); transform: translateY(-110%); opacity: 0; pointer-events: none; transition: var(--transition); }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-cta { width: 100%; justify-content: center; margin-top: 8px; }
}
/* ===== Hero ===== */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  padding: calc(var(--header-h) + 40px) 0 80px;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero-bg::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10,14,23,0.92) 0%, rgba(10,14,23,0.7) 50%, rgba(10,14,23,0.92) 100%); }
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(ellipse at 20% 50%, rgba(0,240,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 30%, rgba(123,47,252,0.06) 0%, transparent 50%);
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 100px;
  background: rgba(0,240,255,0.1); border: 1px solid rgba(0,240,255,0.2);
  font-size: 0.8rem; font-weight: 500; color: var(--primary); margin-bottom: 24px;
}
.hero h1 { margin-bottom: 20px; }
.hero h1 .highlight { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 1.15rem; color: var(--text-secondary); max-width: 580px; line-height: 1.8; margin-bottom: 36px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 32px; border-radius: 10px;
  font-weight: 600; font-size: 1rem;
  transition: var(--transition); cursor: pointer; border: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; box-shadow: 0 0 30px rgba(0,240,255,0.2);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 0 50px rgba(0,240,255,0.35); color: #fff; }
.btn-secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text-primary); border: 1px solid var(--border-light);
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--text-muted); transform: translateY(-3px); color: var(--text-primary); }
.btn-sm { padding: 10px 22px; font-size: 0.85rem; }
/* ===== 通用板块 ===== */
.section { padding: 80px 0; }
.section-header { margin-bottom: 48px; }
.section-header.text-center .section-desc { margin: 0 auto; }
.section-divider {
  width: 60px; height: 3px; background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px; margin: 16px 0 20px;
}
.text-center .section-divider { margin: 16px auto 20px; }
/* ===== 卡片网格 ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }
/* ===== 卡片 ===== */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  transition: var(--transition);
}
.card:hover { border-color: var(--border-light); box-shadow: var(--shadow), var(--shadow-glow); transform: translateY(-4px); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-body { padding: 24px; }
.card-cat {
  display: inline-block; padding: 3px 12px; border-radius: 100px;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.03em;
  background: rgba(0,240,255,0.1); color: var(--primary); margin-bottom: 10px;
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.card-title a { color: var(--text-primary); }
.card-title a:hover { color: var(--primary); }
.card-text { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin-bottom: 14px; }
.card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
.card-meta i { margin-right: 4px; }
/* ===== 分类入口卡片 ===== */
.cat-card {
  position: relative; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px 28px;
  transition: var(--transition); cursor: pointer;
  display: flex; flex-direction: column; align-items: flex-start;
}
.cat-card:hover { border-color: var(--primary); box-shadow: var(--shadow-glow); transform: translateY(-6px); }
.cat-card-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,240,255,0.12), rgba(123,47,252,0.12));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--primary); margin-bottom: 18px;
}
.cat-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.cat-card p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.cat-card .cat-count { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
/* ===== 数据区块 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px; text-align: center;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-glow); }
.stat-number { font-size: 2.4rem; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: 0.85rem; color: var(--text-secondary); margin-top: 6px; }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .stats-grid { grid-template-columns: 1fr 1fr; } }
/* ===== 特色区块 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 28px;
  transition: var(--transition);
}
.feature-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-glow-secondary); transform: translateY(-4px); }
.feature-icon { width: 48px; height: 48px; border-radius: 12px; background: rgba(123,47,252,0.1); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; color: var(--secondary); margin-bottom: 16px; }
.feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.feature-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }
@media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }
/* ===== 内容展示图文 ===== */
.showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.showcase-img { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow); }
.showcase-img img { width: 100%; height: 100%; object-fit: cover; }
.showcase-content h2 { margin-bottom: 16px; }
.showcase-content p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; }
.showcase-list { display: flex; flex-direction: column; gap: 12px; }
.showcase-list li { display: flex; align-items: center; gap: 12px; font-size: 0.95rem; color: var(--text-secondary); }
.showcase-list li i { color: var(--primary); font-size: 0.9rem; width: 20px; }
@media (max-width: 768px) { .showcase { grid-template-columns: 1fr; gap: 32px; } }
/* ===== FAQ ===== */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 24px;
  transition: var(--transition); cursor: pointer;
}
.faq-item:hover { border-color: var(--border-light); }
.faq-q { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-weight: 600; font-size: 0.95rem; color: var(--text-primary); }
.faq-q i { color: var(--primary); font-size: 0.85rem; transition: var(--transition); }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }
.faq-item.open .faq-a { max-height: 300px; padding-top: 14px; }
@media (max-width: 768px) { .faq-grid { grid-template-columns: 1fr; } }
/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, rgba(0,240,255,0.05), rgba(123,47,252,0.05));
  border: 1px solid var(--border); border-radius: var(--radius-xl);
  padding: 64px 48px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(0,240,255,0.06) 0%, transparent 70%);
}
.cta-section h2 { position: relative; margin-bottom: 12px; }
.cta-section p { position: relative; color: var(--text-secondary); max-width: 520px; margin: 0 auto 28px; font-size: 1.05rem; }
.cta-actions { position: relative; display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
/* ===== 最新资讯列表（CMS） ===== */
.post-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.post-card {
  display: flex; gap: 20px; background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; transition: var(--transition);
}
.post-card:hover { border-color: var(--border-light); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
.post-thumb { width: 120px; min-height: 90px; border-radius: 8px; overflow: hidden; flex-shrink: 0; background: var(--bg-elevated); }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-info { flex: 1; display: flex; flex-direction: column; gap: 6px; }
.post-info .post-cat { font-size: 0.72rem; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: 0.05em; }
.post-info h4 { font-size: 0.95rem; font-weight: 600; line-height: 1.4; }
.post-info h4 a { color: var(--text-primary); }
.post-info h4 a:hover { color: var(--primary); }
.post-info .post-excerpt { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-info .post-meta { font-size: 0.75rem; color: var(--text-muted); display: flex; gap: 14px; align-items: center; }
.post-info .post-meta i { margin-right: 4px; }
.empty-msg { grid-column: 1 / -1; text-align: center; padding: 48px 24px; color: var(--text-muted); font-size: 1rem; background: var(--bg-card); border-radius: var(--radius); border: 1px dashed var(--border); }
@media (max-width: 768px) {
  .post-list { grid-template-columns: 1fr; }
  .post-card { flex-direction: column; }
  .post-thumb { width: 100%; height: 180px; }
}
/* ===== 页脚 ===== */
.footer {
  background: var(--bg-nav); border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; max-width: 340px; }
.footer-social { display: flex; gap: 12px; margin-top: 18px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 10px;
  background: rgba(255,255,255,0.04); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); font-size: 0.95rem;
  transition: var(--transition);
}
.footer-social a:hover { background: rgba(0,240,255,0.1); border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.footer h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-secondary); font-size: 0.85rem; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 20px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-size: 0.8rem; color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } .footer-bottom { flex-direction: column; text-align: center; } }
/* ===== 工具箱 ===== */
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
/* ===== 响应式补充 ===== */
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .section { padding: 56px 0; }
  .hero { min-height: 80vh; padding: calc(var(--header-h) + 24px) 0 48px; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
  .cta-section { padding: 40px 24px; }
  .stat-number { font-size: 1.8rem; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
  :root {
    --clr-bg: #080c1a;
    --clr-bg-alt: #0c1228;
    --clr-surface: rgba(255, 255, 255, 0.04);
    --clr-surface-hover: rgba(255, 255, 255, 0.08);
    --clr-border: rgba(0, 212, 255, 0.15);
    --clr-border-light: rgba(255, 255, 255, 0.06);
    --clr-primary: #00d4ff;
    --clr-primary-dim: rgba(0, 212, 255, 0.25);
    --clr-primary-glow: rgba(0, 212, 255, 0.40);
    --clr-secondary: #8b5cf6;
    --clr-accent: #00ff88;
    --clr-text: #eef2f8;
    --clr-text-muted: #8899b0;
    --clr-text-dim: #5a6a82;
    --clr-danger: #ff5a7a;
    --clr-warning: #fbbf24;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --radius-full: 9999px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.50);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.60);
    --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
    --transition: 0.32s cubic-bezier(0.23, 1, 0.32, 1);
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --container-w: 1200px;
    --header-h: 72px;
    --space-section: 100px;
    --space-section-mobile: 60px;
  }

  /* ===== 基础 Reset ===== */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
  body {
    font-family: var(--font-base);
    background: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
  }
  a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
  a:hover { color: #66e5ff; }
  a:focus-visible { outline: 2px solid var(--clr-primary); outline-offset: 4px; border-radius: 4px; }
  img { max-width: 100%; height: auto; display: block; }
  button { cursor: pointer; font-family: inherit; border: none; background: none; }
  input, textarea { font-family: inherit; font-size: 1rem; }
  ul, ol { list-style: none; }
  h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; letter-spacing: -0.02em; }
  h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
  h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
  h3 { font-size: clamp(1.15rem, 2.5vw, 1.6rem); }
  h4 { font-size: 1.1rem; }
  p { margin-bottom: 0.8rem; color: var(--clr-text-muted); }
  strong { color: var(--clr-text); font-weight: 600; }

  /* ===== 容器 ===== */
  .container {
    width: 100%;
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
  }
  @media (max-width: 768px) { .container { padding: 0 18px; } }

  /* ===== 通用组件 ===== */
  .section { padding: var(--space-section) 0; position: relative; }
  @media (max-width: 768px) { .section { padding: var(--space-section-mobile) 0; } }
  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.80rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--clr-primary);
    background: var(--clr-primary-dim);
    padding: 4px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 18px;
  }
  .section-label i { font-size: 0.7rem; }
  .section-title {
    margin-bottom: 16px;
    max-width: 700px;
  }
  .section-desc {
    font-size: 1.1rem;
    max-width: 620px;
    color: var(--clr-text-muted);
    margin-bottom: 40px;
  }
  @media (max-width: 768px) { .section-desc { font-size: 1rem; margin-bottom: 30px; } }

  .btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 30px;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    border: 1px solid transparent;
    background: var(--clr-primary);
    color: #080c1a;
    box-shadow: 0 4px 18px rgba(0, 212, 255, 0.25);
  }
  .btn:hover { background: #66e5ff; transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35); color: #080c1a; }
  .btn:active { transform: translateY(0); }
  .btn-outline {
    background: transparent;
    color: var(--clr-primary);
    border-color: var(--clr-primary);
    box-shadow: none;
  }
  .btn-outline:hover { background: var(--clr-primary); color: #080c1a; box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25); }
  .btn-sm { padding: 8px 20px; font-size: 0.85rem; gap: 6px; }
  .btn-lg { padding: 16px 40px; font-size: 1.05rem; }

  .badge {
    display: inline-block;
    padding: 2px 14px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: var(--clr-surface);
    color: var(--clr-text-muted);
    border: 1px solid var(--clr-border-light);
    transition: all var(--transition);
  }
  .badge-primary { background: var(--clr-primary-dim); color: var(--clr-primary); border-color: rgba(0,212,255,0.2); }
  .badge-secondary { background: rgba(139, 92, 246, 0.18); color: var(--clr-secondary); border-color: rgba(139,92,246,0.2); }
  .badge-accent { background: rgba(0, 255, 136, 0.14); color: var(--clr-accent); border-color: rgba(0,255,136,0.2); }

  .card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
  }
  .card:hover { background: var(--clr-surface-hover); border-color: var(--clr-border); transform: translateY(-4px); box-shadow: var(--shadow-glow); }

  /* ===== Header / 导航 ===== */
  .header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: rgba(8, 12, 26, 0.88);
    backdrop-filter: blur(20px) saturate(1.3);
    border-bottom: 1px solid rgba(0, 212, 255, 0.08);
    z-index: 1000;
    transition: background var(--transition);
  }
  .header-inner {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .logo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--clr-text);
    letter-spacing: -0.02em;
    text-decoration: none;
  }
  .logo:hover { color: var(--clr-text); }
  .logo .logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--clr-primary);
    color: #080c1a;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 1.2rem;
    margin-right: 4px;
  }
  .logo span { color: var(--clr-primary); font-weight: 700; }
  .nav {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .nav a {
    position: relative;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    font-size: 0.90rem;
    font-weight: 500;
    color: var(--clr-text-muted);
    text-decoration: none;
    transition: all var(--transition);
  }
  .nav a i { margin-right: 6px; font-size: 0.85rem; }
  .nav a:hover { color: var(--clr-text); background: var(--clr-surface); }
  .nav a.active {
    color: var(--clr-primary);
    background: var(--clr-primary-dim);
  }
  .nav a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--clr-primary);
    border-radius: 2px;
    box-shadow: 0 0 12px var(--clr-primary-glow);
  }
  .nav .nav-cta {
    background: var(--clr-primary);
    color: #080c1a !important;
    font-weight: 600;
    padding: 8px 22px;
    margin-left: 6px;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
  }
  .nav .nav-cta:hover { background: #66e5ff; transform: scale(1.03); color: #080c1a !important; }
  .nav .nav-cta::after { display: none !important; }

  .nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: transparent;
    border: none;
  }
  .nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    border-radius: 2px;
    background: var(--clr-text);
    transition: all var(--transition);
  }
  @media (max-width: 768px) {
    .nav { display: none; }
    .nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(8, 12, 26, 0.98); border-bottom: 1px solid var(--clr-border); padding: 16px 24px; gap: 4px; backdrop-filter: blur(20px); }
    .nav.open a { width: 100%; padding: 12px 18px; }
    .nav.open .nav-cta { margin-left: 0; margin-top: 6px; text-align: center; }
    .nav-toggle { display: flex; }
  }

  /* ===== Banner ===== */
  .banner {
    padding: 140px 0 80px;
    position: relative;
    background: linear-gradient(165deg, #0a0f22 0%, #0f1a2e 40%, #0a0f22 100%);
    overflow: hidden;
    min-height: 320px;
    display: flex;
    align-items: center;
  }
  .banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: overlay;
    pointer-events: none;
  }
  .banner::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: linear-gradient(to top, var(--clr-bg) 0%, transparent 100%);
    pointer-events: none;
  }
  .banner .container { position: relative; z-index: 2; }
  .banner h1 { margin-bottom: 16px; }
  .banner h1 span { color: var(--clr-primary); }
  .banner p { font-size: 1.15rem; max-width: 600px; margin-bottom: 28px; }
  .banner .banner-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
  .banner .banner-tags .badge { font-size: 0.78rem; padding: 4px 18px; }
  @media (max-width: 768px) {
    .banner { padding: 110px 0 50px; min-height: 240px; }
    .banner p { font-size: 1rem; }
  }

  /* ===== 资讯分类标签 ===== */
  .tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin: 30px 0 10px;
  }
  .tag-cloud .tag-item {
    padding: 8px 22px;
    border-radius: var(--radius-full);
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--clr-text-muted);
    transition: all var(--transition);
    cursor: default;
  }
  .tag-cloud .tag-item:hover { background: var(--clr-surface-hover); border-color: var(--clr-border); color: var(--clr-text); }
  .tag-cloud .tag-item.active { background: var(--clr-primary-dim); color: var(--clr-primary); border-color: rgba(0,212,255,0.3); }

  /* ===== 资讯卡片网格 ===== */
  .news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  @media (max-width: 1024px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 640px) { .news-grid { grid-template-columns: 1fr; } }
  .news-card {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
  }
  .news-card:hover { transform: translateY(-5px); border-color: var(--clr-border); box-shadow: var(--shadow-glow); }
  .news-card .card-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    display: block;
    background: #0f1a2e;
    transition: transform 0.5s ease;
  }
  .news-card:hover .card-img { transform: scale(1.03); }
  .news-card .card-body { padding: 18px 20px 22px; }
  .news-card .card-body .card-meta { display: flex; align-items: center; gap: 14px; font-size: 0.78rem; color: var(--clr-text-dim); margin-bottom: 10px; }
  .news-card .card-body .card-meta i { margin-right: 4px; font-size: 0.7rem; }
  .news-card .card-body h3 { font-size: 1.05rem; margin-bottom: 8px; font-weight: 600; }
  .news-card .card-body h3 a { color: var(--clr-text); }
  .news-card .card-body h3 a:hover { color: var(--clr-primary); }
  .news-card .card-body p { font-size: 0.88rem; color: var(--clr-text-muted); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .news-card .card-body .card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid rgba(255,255,255,0.05); }
  .news-card .card-body .card-footer .badge { font-size: 0.68rem; padding: 2px 12px; }

  /* ===== 数据统计 ===== */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }
  @media (max-width: 900px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }
  .stat-card {
    text-align: center;
    padding: 32px 16px;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition);
  }
  .stat-card:hover { border-color: var(--clr-border); box-shadow: var(--shadow-glow); transform: translateY(-3px); }
  .stat-card .stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--clr-primary);
    font-family: var(--font-mono);
    line-height: 1.1;
    margin-bottom: 6px;
  }
  .stat-card .stat-number .stat-suffix { font-size: 1.4rem; color: var(--clr-text-dim); }
  .stat-card .stat-label { font-size: 0.90rem; color: var(--clr-text-muted); font-weight: 500; }

  /* ===== 专题卡片 ===== */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  @media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }
  .feature-card {
    display: flex;
    flex-direction: column;
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
  }
  .feature-card:hover { transform: translateY(-4px); border-color: var(--clr-border); box-shadow: var(--shadow-glow); }
  .feature-card .feature-img {
    width: 100%;
    aspect-ratio: 21 / 9;
    object-fit: cover;
    background: #0f1a2e;
  }
  .feature-card .feature-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
  .feature-card .feature-body .badge { align-self: flex-start; margin-bottom: 12px; }
  .feature-card .feature-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
  .feature-card .feature-body p { font-size: 0.90rem; margin-bottom: 16px; flex: 1; }
  .feature-card .feature-body .feature-link { color: var(--clr-primary); font-weight: 600; font-size: 0.90rem; display: inline-flex; align-items: center; gap: 6px; }
  .feature-card .feature-body .feature-link i { font-size: 0.75rem; transition: transform var(--transition); }
  .feature-card .feature-body .feature-link:hover i { transform: translateX(4px); }

  /* ===== FAQ ===== */
  .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
  .faq-item {
    background: var(--clr-surface);
    border: 1px solid var(--clr-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition);
  }
  .faq-item:hover { border-color: var(--clr-border); }
  .faq-item .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 22px;
    font-weight: 600;
    font-size: 1.0rem;
    color: var(--clr-text);
    background: transparent;
    width: 100%;
    text-align: left;
    gap: 16px;
    transition: background var(--transition);
  }
  .faq-item .faq-question:hover { background: var(--clr-surface-hover); }
  .faq-item .faq-question i { font-size: 0.85rem; color: var(--clr-primary); transition: transform var(--transition); flex-shrink: 0; }
  .faq-item.open .faq-question i { transform: rotate(180deg); }
  .faq-item .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 22px;
    color: var(--clr-text-muted);
    font-size: 0.93rem;
    line-height: 1.7;
  }
  .faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 20px; }

  /* ===== CTA ===== */
  .cta-section {
    background: linear-gradient(145deg, #0f1a2e 0%, #080c1a 100%);
    border-top: 1px solid var(--clr-border);
    border-bottom: 1px solid var(--clr-border);
    text-align: center;
    padding: 72px 0;
    position: relative;
    overflow: hidden;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
    opacity: 0.06;
    mix-blend-mode: overlay;
    pointer-events: none;
  }
  .cta-section .container { position: relative; z-index: 2; }
  .cta-section h2 { margin-bottom: 14px; }
  .cta-section p { max-width: 520px; margin: 0 auto 30px; font-size: 1.05rem; }
  .cta-section .cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

  /* ===== Footer ===== */
  .footer {
    background: #060a16;
    border-top: 1px solid rgba(0, 212, 255, 0.06);
    padding: 60px 0 30px;
  }
  .footer .logo { margin-bottom: 16px; }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
  }
  @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 30px; } }
  .footer-brand p { font-size: 0.90rem; max-width: 380px; margin-bottom: 18px; }
  .footer-social { display: flex; gap: 14px; }
  .footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--clr-surface);
    color: var(--clr-text-muted);
    border: 1px solid var(--clr-border-light);
    transition: all var(--transition);
    font-size: 1.1rem;
  }
  .footer-social a:hover { background: var(--clr-primary-dim); color: var(--clr-primary); border-color: var(--clr-primary); transform: translateY(-3px); }
  .footer h4 { font-size: 0.95rem; margin-bottom: 18px; color: var(--clr-text); font-weight: 600; letter-spacing: 0.02em; }
  .footer-links { display: flex; flex-direction: column; gap: 10px; }
  .footer-links a { color: var(--clr-text-muted); font-size: 0.88rem; transition: all var(--transition); }
  .footer-links a:hover { color: var(--clr-primary); padding-left: 4px; }
  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-top: 28px;
    border-top: 1px solid rgba(255,255,255,0.04);
    font-size: 0.82rem;
    color: var(--clr-text-dim);
  }
  .footer-bottom a { color: var(--clr-text-muted); }
  .footer-bottom a:hover { color: var(--clr-primary); }
  @media (max-width: 520px) { .footer-bottom { flex-direction: column; text-align: center; } }

  /* ===== 霓虹装饰线 ===== */
  .neon-divider {
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--clr-primary), transparent);
    margin: 12px 0 24px;
    border-radius: 2px;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
  }
  .neon-divider.center { margin-left: auto; margin-right: auto; }

  /* ===== 辅助 ===== */
  .text-center { text-align: center; }
  .text-primary { color: var(--clr-primary); }
  .mt-8 { margin-top: 8px; }
  .mt-16 { margin-top: 16px; }
  .mt-32 { margin-top: 32px; }
  .mb-16 { margin-bottom: 16px; }
  .mb-32 { margin-bottom: 32px; }
  .gap-12 { gap: 12px; }
  .flex-center { display: flex; align-items: center; justify-content: center; }
  .flex-wrap { flex-wrap: wrap; }

  /* ===== 响应式微调 ===== */
  @media (max-width: 520px) {
    .banner h1 { font-size: 1.8rem; }
    .stat-card .stat-number { font-size: 2.0rem; }
    .news-card .card-body { padding: 14px 16px 18px; }
    .feature-card .feature-body { padding: 16px 18px 20px; }
  }

/* roulang page: article */
:root {
  --primary: #00d4ff;
  --primary-glow: rgba(0, 212, 255, 0.3);
  --primary-dim: rgba(0, 212, 255, 0.1);
  --secondary: #7c3aed;
  --secondary-glow: rgba(124, 58, 237, 0.3);
  --accent: #f59e0b;
  --bg-dark: #0a0e1a;
  --bg-card: #111827;
  --bg-card-hover: #1a2235;
  --bg-elevated: #1e293b;
  --bg-input: #0f172a;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(0, 212, 255, 0.15);
  --border-glow: rgba(0, 212, 255, 0.3);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 40px rgba(0, 212, 255, 0.05);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 80px rgba(0, 212, 255, 0.08);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--bg-dark);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:#80ebff}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md)}
button,.btn{cursor:pointer;font-family:inherit;border:none;outline:none;transition:all var(--transition)}
input,textarea{font-family:inherit;outline:none;border:none}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text-primary)}
h1{font-size:clamp(1.8rem,4vw,3.2rem);letter-spacing:-0.02em}
h2{font-size:clamp(1.4rem,3vw,2.2rem);letter-spacing:-0.01em}
h3{font-size:clamp(1.1rem,2vw,1.5rem)}
h4{font-size:1.1rem}
p{margin-bottom:1rem;color:var(--text-secondary)}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}

/* header / nav */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,14,26,0.85);backdrop-filter:blur(20px) saturate(1.4);-webkit-backdrop-filter:blur(20px) saturate(1.4);border-bottom:1px solid var(--border-color);height:var(--header-height);transition:background var(--transition)}
.header-inner{max-width:var(--max-width);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:8px;font-size:1.5rem;font-weight:800;color:var(--text-primary);letter-spacing:-0.03em;text-decoration:none;flex-shrink:0}
.logo:hover{color:var(--primary)}
.logo .logo-icon{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:900;font-size:1.2rem;box-shadow:0 0 20px var(--primary-glow)}
.logo span{color:var(--primary);font-weight:300}
.nav{display:flex;align-items:center;gap:6px}
.nav a{position:relative;display:flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);font-size:0.9rem;font-weight:500;color:var(--text-secondary);text-decoration:none;transition:all var(--transition);white-space:nowrap}
.nav a i{font-size:0.85rem;opacity:0.7}
.nav a:hover{color:var(--text-primary);background:var(--primary-dim)}
.nav a.active,.nav a.active:hover{color:var(--primary);background:var(--primary-dim);box-shadow:inset 0 0 20px var(--primary-glow),0 0 20px var(--primary-glow)}
.nav a.active::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60%;height:2px;background:var(--primary);border-radius:2px;box-shadow:0 0 10px var(--primary)}
.nav a.nav-cta{background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:600;padding:8px 20px;border-radius:var(--radius-sm);box-shadow:0 0 20px var(--primary-glow)}
.nav a.nav-cta:hover{transform:translateY(-2px);box-shadow:0 0 40px var(--secondary-glow);color:#fff}
.nav a.nav-cta i{opacity:1}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:transparent;padding:8px;border-radius:var(--radius-sm);cursor:pointer}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:all var(--transition)}
.nav-toggle:hover span{background:var(--primary)}
@media(max-width:768px){
  .nav-toggle{display:flex}
  .nav{position:fixed;top:var(--header-height);left:0;right:0;background:rgba(10,14,26,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:16px 24px 24px;gap:4px;border-bottom:1px solid var(--border-color);transform:translateY(-120%);opacity:0;pointer-events:none;transition:all 0.4s cubic-bezier(0.4,0,0.2,1);max-height:calc(100vh - var(--header-height));overflow-y:auto}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav a{width:100%;padding:12px 16px;font-size:1rem;justify-content:flex-start}
  .nav a.nav-cta{margin-top:4px;justify-content:center}
  .nav a.active::after{display:none}
}

/* main */
.main{padding-top:var(--header-height);min-height:80vh}

/* hero / banner */
.article-hero{position:relative;padding:80px 0 60px;background:var(--bg-dark);overflow:hidden}
.article-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.12;pointer-events:none}
.article-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,14,26,0.3) 0%,var(--bg-dark) 100%);pointer-events:none}
.article-hero .container{position:relative;z-index:2}
.article-breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:24px;font-size:0.85rem;color:var(--text-muted);flex-wrap:wrap}
.article-breadcrumb a{color:var(--text-muted);transition:color var(--transition)}
.article-breadcrumb a:hover{color:var(--primary)}
.article-breadcrumb .sep{color:var(--border-color);font-size:0.7rem}
.article-breadcrumb .current{color:var(--primary)}
.article-category-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:var(--primary-dim);border:1px solid var(--border-glow);border-radius:20px;font-size:0.8rem;font-weight:600;color:var(--primary);margin-bottom:16px;box-shadow:0 0 20px var(--primary-glow)}
.article-category-badge i{font-size:0.75rem}
.article-hero h1{font-size:clamp(1.6rem,4vw,2.8rem);color:var(--text-primary);max-width:900px;line-height:1.25;margin-bottom:20px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:16px 24px;color:var(--text-muted);font-size:0.9rem}
.article-meta .meta-item{display:flex;align-items:center;gap:6px}
.article-meta .meta-item i{font-size:0.8rem;color:var(--primary);opacity:0.7}
.article-meta .meta-divider{width:4px;height:4px;border-radius:50%;background:var(--text-muted);opacity:0.4}

/* article body */
.article-body-section{padding:40px 0 60px;background:var(--bg-dark)}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:48px}
@media(max-width:1024px){.article-layout{grid-template-columns:1fr;gap:40px}}
.article-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:40px 48px;box-shadow:var(--shadow-md)}
@media(max-width:768px){.article-content{padding:24px 20px}}
.article-content .post-body{font-size:1.05rem;line-height:1.85;color:var(--text-secondary)}
.article-content .post-body p{margin-bottom:1.4rem}
.article-content .post-body h2,.article-content .post-body h3,.article-content .post-body h4{margin-top:2rem;margin-bottom:1rem;color:var(--text-primary)}
.article-content .post-body h2{border-bottom:1px solid var(--border-color);padding-bottom:0.5rem}
.article-content .post-body ul,.article-content .post-body ol{padding-left:1.5rem;margin-bottom:1.4rem;color:var(--text-secondary)}
.article-content .post-body ul li{list-style:disc;margin-bottom:0.4rem}
.article-content .post-body ol li{list-style:decimal;margin-bottom:0.4rem}
.article-content .post-body img{border-radius:var(--radius-md);margin:1.5rem 0;box-shadow:var(--shadow-sm)}
.article-content .post-body blockquote{border-left:3px solid var(--primary);padding:1rem 1.5rem;margin:1.5rem 0;background:var(--primary-dim);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);font-style:italic}
.article-content .post-body code{background:var(--bg-elevated);padding:2px 8px;border-radius:4px;font-size:0.9em;color:var(--primary)}
.article-content .post-body pre{background:var(--bg-elevated);padding:1.2rem 1.5rem;border-radius:var(--radius-md);overflow-x:auto;border:1px solid var(--border-color);margin:1.5rem 0}
.article-content .post-body pre code{background:transparent;padding:0;color:inherit}
.article-content .post-body a{color:var(--primary);text-decoration:underline;text-underline-offset:2px}
.article-content .post-body a:hover{color:#80ebff}

/* article sidebar */
.article-sidebar{display:flex;flex-direction:column;gap:32px}
.sidebar-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-sm)}
.sidebar-card h3{font-size:1.05rem;margin-bottom:16px;display:flex;align-items:center;gap:8px;color:var(--text-primary)}
.sidebar-card h3 i{color:var(--primary);font-size:0.9rem}
.sidebar-list{display:flex;flex-direction:column;gap:12px}
.sidebar-list-item{display:flex;gap:12px;align-items:flex-start;padding:12px;border-radius:var(--radius-sm);transition:background var(--transition);cursor:pointer;text-decoration:none}
.sidebar-list-item:hover{background:var(--primary-dim)}
.sidebar-list-item img{width:64px;height:48px;object-fit:cover;border-radius:var(--radius-sm);flex-shrink:0;background:var(--bg-elevated)}
.sidebar-list-item .item-info{flex:1;min-width:0}
.sidebar-list-item .item-title{font-size:0.88rem;font-weight:600;color:var(--text-primary);line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sidebar-list-item .item-meta{font-size:0.75rem;color:var(--text-muted);margin-top:4px;display:flex;align-items:center;gap:8px}
.sidebar-tags{display:flex;flex-wrap:wrap;gap:8px}
.sidebar-tags .tag{display:inline-flex;padding:4px 14px;background:var(--primary-dim);border:1px solid var(--border-color);border-radius:20px;font-size:0.78rem;color:var(--text-secondary);transition:all var(--transition);text-decoration:none}
.sidebar-tags .tag:hover{background:var(--primary-glow);color:var(--primary);border-color:var(--primary)}

/* tags area */
.article-tags-area{padding:20px 0 0;border-top:1px solid var(--border-color);margin-top:32px;display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.article-tags-area .tags-label{font-size:0.85rem;color:var(--text-muted);display:flex;align-items:center;gap:6px}
.article-tags-area .tags-label i{color:var(--primary)}
.article-tags-area .tag{display:inline-flex;padding:4px 14px;background:var(--primary-dim);border:1px solid var(--border-color);border-radius:20px;font-size:0.78rem;color:var(--text-secondary);transition:all var(--transition);text-decoration:none}
.article-tags-area .tag:hover{background:var(--primary-glow);color:var(--primary);border-color:var(--primary)}

/* related articles */
.related-section{padding:60px 0;background:var(--bg-dark);border-top:1px solid var(--border-color)}
.related-section .section-title{text-align:center;margin-bottom:40px}
.related-section .section-title h2{font-size:clamp(1.3rem,2.5vw,1.8rem);color:var(--text-primary)}
.related-section .section-title p{color:var(--text-muted);margin-top:8px;font-size:0.95rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:1024px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.related-grid{grid-template-columns:1fr}}
.related-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition);text-decoration:none;display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-6px);border-color:var(--border-glow);box-shadow:var(--shadow-glow),var(--shadow-md)}
.related-card .card-img{height:180px;background:var(--bg-elevated);overflow:hidden;position:relative}
.related-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.related-card:hover .card-img img{transform:scale(1.06)}
.related-card .card-img .card-cat{position:absolute;top:12px;left:12px;padding:4px 12px;background:rgba(0,0,0,0.7);backdrop-filter:blur(8px);border-radius:20px;font-size:0.72rem;font-weight:600;color:var(--primary);border:1px solid var(--border-glow)}
.related-card .card-body{padding:16px 20px 20px;flex:1;display:flex;flex-direction:column}
.related-card .card-body h3{font-size:1rem;font-weight:600;color:var(--text-primary);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-body p{font-size:0.85rem;color:var(--text-muted);line-height:1.5;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-meta{display:flex;align-items:center;gap:12px;margin-top:12px;font-size:0.78rem;color:var(--text-muted)}

/* faq */
.faq-section{padding:60px 0;background:var(--bg-card);border-top:1px solid var(--border-color)}
.faq-section .section-title{text-align:center;margin-bottom:40px}
.faq-section .section-title h2{font-size:clamp(1.3rem,2.5vw,1.8rem)}
.faq-section .section-title p{color:var(--text-muted);margin-top:8px;font-size:0.95rem}
.faq-grid{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-elevated);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--transition)}
.faq-item:hover{border-color:var(--border-glow)}
.faq-item .faq-question{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;cursor:pointer;gap:16px;user-select:none;background:transparent;width:100%;text-align:left;color:var(--text-primary);font-weight:500;font-size:0.95rem}
.faq-item .faq-question i{color:var(--primary);font-size:0.8rem;transition:transform var(--transition);flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg)}
.faq-item .faq-answer{padding:0 20px 16px;color:var(--text-secondary);font-size:0.9rem;line-height:1.7;display:none}
.faq-item.active .faq-answer{display:block}
.faq-item .faq-answer p:last-child{margin-bottom:0}

/* cta */
.cta-section{padding:80px 0;background:var(--bg-dark);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:0.06;pointer-events:none}
.cta-section::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,212,255,0.05),rgba(124,58,237,0.05));pointer-events:none}
.cta-box{position:relative;z-index:2;max-width:700px;margin:0 auto;text-align:center;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:48px 40px;box-shadow:var(--shadow-lg)}
@media(max-width:768px){.cta-box{padding:32px 24px}}
.cta-box h2{font-size:clamp(1.3rem,2.5vw,1.8rem);margin-bottom:12px}
.cta-box p{color:var(--text-muted);margin-bottom:28px;font-size:0.95rem}
.cta-box .btn-group{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.cta-box .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:600;font-size:0.95rem;border-radius:var(--radius-sm);box-shadow:0 0 30px var(--primary-glow);transition:all var(--transition);text-decoration:none}
.cta-box .btn-primary:hover{transform:translateY(-3px);box-shadow:0 0 50px var(--secondary-glow);color:#fff}
.cta-box .btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;background:transparent;color:var(--text-primary);font-weight:500;font-size:0.95rem;border-radius:var(--radius-sm);border:1px solid var(--border-color);transition:all var(--transition);text-decoration:none}
.cta-box .btn-secondary:hover{background:var(--primary-dim);border-color:var(--primary);color:var(--primary)}

/* footer */
.footer{background:var(--bg-card);border-top:1px solid var(--border-color);padding:60px 0 0;color:var(--text-secondary)}
.footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--border-color)}
@media(max-width:768px){.footer .footer-grid{grid-template-columns:1fr;gap:32px}}
.footer .footer-brand .logo{margin-bottom:16px}
.footer .footer-brand p{font-size:0.9rem;color:var(--text-muted);line-height:1.7;max-width:360px}
.footer .footer-social{display:flex;gap:12px;margin-top:20px}
.footer .footer-social a{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:10px;background:var(--bg-elevated);border:1px solid var(--border-color);color:var(--text-muted);font-size:1.1rem;transition:all var(--transition);text-decoration:none}
.footer .footer-social a:hover{background:var(--primary-dim);color:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.footer h4{font-size:0.95rem;color:var(--text-primary);margin-bottom:16px;font-weight:600}
.footer .footer-links{display:flex;flex-direction:column;gap:10px}
.footer .footer-links a{color:var(--text-muted);font-size:0.88rem;transition:color var(--transition);text-decoration:none}
.footer .footer-links a:hover{color:var(--primary);padding-left:4px}
.footer .footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;padding:20px 0;gap:12px;font-size:0.82rem;color:var(--text-muted)}
.footer .footer-bottom a{color:var(--primary);text-decoration:none}
@media(max-width:640px){.footer .footer-bottom{flex-direction:column;text-align:center}}

/* not found */
.not-found-box{text-align:center;padding:80px 20px}
.not-found-box .not-found-icon{font-size:4rem;color:var(--primary);margin-bottom:20px;opacity:0.6}
.not-found-box h2{font-size:1.8rem;margin-bottom:12px}
.not-found-box p{color:var(--text-muted);margin-bottom:24px;max-width:400px;margin-left:auto;margin-right:auto}
.not-found-box .btn-home{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;font-weight:600;border-radius:var(--radius-sm);text-decoration:none;box-shadow:0 0 30px var(--primary-glow);transition:all var(--transition)}
.not-found-box .btn-home:hover{transform:translateY(-3px);box-shadow:0 0 50px var(--secondary-glow);color:#fff}

/* utility */
.text-center{text-align:center}
.mt-1{margin-top:1rem}
.mt-2{margin-top:2rem}
.mb-1{margin-bottom:1rem}
.mb-2{margin-bottom:2rem}
.gap-1{gap:1rem}

/* scrollbar */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-dark)}
::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

/* selection */
::selection{background:var(--primary);color:#fff;text-shadow:none}

/* responsive extras */
@media(max-width:480px){
  .article-hero{padding:60px 0 40px}
  .article-content{padding:20px 16px;border-radius:var(--radius-md)}
  .article-meta{gap:8px 16px;font-size:0.8rem}
  .related-card .card-img{height:150px}
  .cta-box{padding:24px 16px}
}