/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --primary: #0b1a2e;
  --primary-light: #132a44;
  --accent: #e8b84b;
  --accent-hover: #d4a535;
  --accent-light: #f5e6b8;
  --bg-dark: #050d18;
  --bg-card: #0f1f33;
  --bg-section: #091420;
  --bg-light: #f0f4f8;
  --text-light: #f0f4f8;
  --text-muted: #8899aa;
  --text-dark: #1a2a3a;
  --border-dark: #1a3050;
  --border-light: #2a4a6a;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --max-w: 1200px;
  --header-h: 70px;
}
/* ===== 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); background: var(--bg-dark); color: var(--text-light); line-height: 1.7; font-size: 16px; }
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
/* ===== Utility ===== */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title { font-size: 2.2rem; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.02em; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; line-height: 1.6; }
.text-center { text-align: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }
/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem; cursor: pointer; transition: var(--transition); border: 2px solid transparent; background: transparent; }
.btn-primary { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--primary); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,184,75,0.3); }
.btn-outline { border-color: var(--accent); color: var(--accent); }
.btn-outline:hover { background: var(--accent); color: var(--primary); transform: translateY(-2px); }
.btn-white { background: #fff; color: var(--primary); border-color: #fff; }
.btn-white:hover { background: var(--accent); color: var(--primary); border-color: var(--accent); transform: translateY(-2px); }
/* ===== Badge / Tag ===== */
.tag { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 500; background: rgba(232,184,75,0.15); color: var(--accent); border: 1px solid rgba(232,184,75,0.25); }
.tag-sm { padding: 2px 10px; font-size: 0.7rem; }
/* ===== Card ===== */
.card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border-dark); transition: var(--transition); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--border-light); }
.card-img { width: 100%; height: 200px; object-fit: cover; }
.card-body { padding: 24px; }
.card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.card-title a { color: var(--text-light); }
.card-title a:hover { color: var(--accent); }
.card-text { font-size: 0.95rem; color: var(--text-muted); line-height: 1.6; }
.card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; }
/* ===== Header / Nav ===== */
.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; background: rgba(5,13,24,0.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border-dark); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { font-size: 1.6rem; font-weight: 800; color: var(--text-light); letter-spacing: -0.03em; display: flex; align-items: center; gap: 10px; }
.logo i { color: var(--accent); font-size: 1.4rem; }
.logo:hover { color: var(--accent); }
.nav-main { display: flex; align-items: center; gap: 4px; }
.nav-main a { padding: 8px 18px; border-radius: 50px; font-size: 0.95rem; font-weight: 500; color: var(--text-muted); transition: var(--transition); }
.nav-main a:hover { color: var(--text-light); background: rgba(232,184,75,0.08); }
.nav-main a.active { color: var(--accent); background: rgba(232,184,75,0.12); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.search-btn { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--text-muted); background: transparent; cursor: pointer; transition: var(--transition); font-size: 1.1rem; border: none; }
.search-btn:hover { color: var(--accent); background: rgba(232,184,75,0.1); }
.mobile-toggle { display: none; width: 40px; height: 40px; border-radius: 8px; align-items: center; justify-content: center; color: var(--text-light); background: transparent; cursor: pointer; font-size: 1.4rem; border: none; }
/* ===== Hero ===== */
.hero { position: relative; min-height: 85vh; display: flex; align-items: center; padding-top: var(--header-h); overflow: hidden; background: var(--bg-dark); }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat; opacity: 0.35; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(5,13,24,0.88) 0%, rgba(5,13,24,0.4) 50%, rgba(5,13,24,0.7) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 780px; }
.hero-badge { display: inline-block; padding: 6px 20px; border-radius: 50px; background: rgba(232,184,75,0.12); border: 1px solid rgba(232,184,75,0.2); color: var(--accent); font-size: 0.85rem; font-weight: 500; margin-bottom: 20px; }
.hero h1 { font-size: 3.6rem; font-weight: 800; line-height: 1.15; letter-spacing: -0.03em; margin-bottom: 20px; }
.hero h1 span { color: var(--accent); }
.hero p { font-size: 1.2rem; color: var(--text-muted); max-width: 600px; line-height: 1.7; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-dark); }
.hero-stat h3 { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.hero-stat p { font-size: 0.9rem; color: var(--text-muted); margin: 0; }
/* ===== Section: Intro ===== */
.intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.intro-img { border-radius: var(--radius); width: 100%; height: 380px; object-fit: cover; border: 1px solid var(--border-dark); }
.intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.intro-feat { display: flex; align-items: flex-start; gap: 12px; padding: 16px; background: var(--bg-card); border-radius: var(--radius-sm); border: 1px solid var(--border-dark); }
.intro-feat i { color: var(--accent); font-size: 1.2rem; margin-top: 2px; }
/* ===== Section: Categories ===== */
.cat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.cat-card { background: var(--bg-card); border-radius: var(--radius); padding: 32px 28px; border: 1px solid var(--border-dark); transition: var(--transition); text-align: center; }
.cat-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 8px 32px rgba(232,184,75,0.08); }
.cat-card-icon { width: 64px; height: 64px; border-radius: 50%; background: rgba(232,184,75,0.1); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.6rem; color: var(--accent); }
.cat-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; }
.cat-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
.cat-card .btn { margin-top: 16px; }
/* ===== Section: Latest Posts ===== */
.post-list { display: grid; grid-template-columns: 1fr; gap: 20px; }
.post-item { display: flex; gap: 24px; background: var(--bg-card); border-radius: var(--radius); padding: 20px; border: 1px solid var(--border-dark); transition: var(--transition); }
.post-item:hover { border-color: var(--border-light); transform: translateX(4px); }
.post-item-img { width: 180px; min-height: 120px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.post-item-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.post-item-body h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; }
.post-item-body h3 a { color: var(--text-light); }
.post-item-body h3 a:hover { color: var(--accent); }
.post-item-body p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; margin-bottom: 8px; }
.post-item-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); background: var(--bg-card); border-radius: var(--radius); border: 1px dashed var(--border-dark); }
.empty-state i { font-size: 2.4rem; margin-bottom: 16px; color: var(--accent); opacity: 0.5; }
/* ===== Section: Stats / Numbers ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 32px 16px; background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border-dark); }
.stat-card .num { font-size: 2.6rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-card .label { font-size: 0.95rem; color: var(--text-muted); margin-top: 8px; }
/* ===== Section: Process ===== */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step .step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--primary); font-weight: 700; font-size: 1.2rem; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.process-step h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 6px; }
.process-step p { font-size: 0.9rem; color: var(--text-muted); }
/* ===== Section: FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-card); border-radius: var(--radius-sm); margin-bottom: 12px; border: 1px solid var(--border-dark); overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: var(--border-light); }
.faq-q { padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 500; font-size: 1rem; transition: var(--transition); user-select: none; }
.faq-q i { transition: var(--transition); color: var(--accent); font-size: 0.9rem; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; }
.faq-item.open .faq-a { max-height: 300px; padding: 0 24px 18px; }
.faq-a p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.7; }
/* ===== Section: CTA ===== */
.cta-section { background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-dark) 100%); border-radius: var(--radius-lg); padding: 64px 48px; text-align: center; border: 1px solid var(--border-dark); }
.cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-section p { font-size: 1.05rem; color: var(--text-muted); max-width: 560px; margin: 0 auto 28px; }
/* ===== Footer ===== */
.footer { border-top: 1px solid var(--border-dark); padding: 48px 0 24px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 320px; line-height: 1.7; }
.footer h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; color: var(--text-light); }
.footer ul li { margin-bottom: 8px; }
.footer ul a { color: var(--text-muted); font-size: 0.9rem; }
.footer ul a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a { width: 40px; height: 40px; border-radius: 50%; background: var(--bg-card); border: 1px solid var(--border-dark); display: flex; align-items: center; justify-content: center; color: var(--text-muted); transition: var(--transition); }
.footer-social a:hover { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.footer-bottom { border-top: 1px solid var(--border-dark); padding-top: 20px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: var(--text-muted); }
/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.8rem; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .nav-main { position: fixed; top: var(--header-h); left: 0; width: 100%; background: rgba(5,13,24,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 20px; gap: 8px; border-bottom: 1px solid var(--border-dark); transform: translateY(-120%); opacity: 0; transition: var(--transition); }
  .nav-main.open { transform: translateY(0); opacity: 1; }
  .nav-main a { width: 100%; padding: 12px 20px; }
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 1rem; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-features { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .post-item { flex-direction: column; }
  .post-item-img { width: 100%; height: 200px; }
  .section-title { font-size: 1.8rem; }
  .cta-section { padding: 40px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .stats-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .cat-cards { grid-template-columns: 1fr; }
}

/* roulang page: article */
:root {
  --primary: #1a2a4a;
  --primary-light: #2c4a7a;
  --primary-dark: #0f1a30;
  --accent: #f5c842;
  --accent-light: #f8d86a;
  --accent-dark: #d4a830;
  --bg: #f8f9fc;
  --bg-alt: #eef1f7;
  --bg-dark: #0d1525;
  --text: #1a1a2e;
  --text-light: #5a6a7e;
  --text-inverse: #ffffff;
  --border: #dce1ea;
  --border-light: #e8ecf3;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(26, 42, 74, 0.08);
  --shadow-hover: 0 12px 40px rgba(26, 42, 74, 0.14);
  --shadow-btn: 0 4px 16px rgba(245, 200, 66, 0.35);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
input, button, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }
h1 { font-size: 2.4rem; }
h2 { font-size: 2rem; margin-bottom: 16px; }
h3 { font-size: 1.4rem; margin-bottom: 12px; }
p { margin-bottom: 16px; color: var(--text-light); }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-inverse); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2rem; color: var(--primary); margin-bottom: 8px; }
.section-title p { max-width: 640px; margin: 0 auto; color: var(--text-light); font-size: 1.05rem; }
.section-dark .section-title h2 { color: var(--text-inverse); }
.section-dark .section-title p { color: rgba(255,255,255,0.7); }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem; cursor: pointer; transition: var(--transition); border: none; text-decoration: none; }
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: var(--primary-dark); box-shadow: var(--shadow-btn); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245, 200, 66, 0.45); color: var(--primary-dark); }
.btn-outline { background: transparent; color: var(--text-inverse); border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--accent); color: var(--accent); }
.card { background: var(--text-inverse); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-body { padding: 24px; }
.card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.card-body p { font-size: 0.92rem; color: var(--text-light); margin-bottom: 12px; }
.card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-light); }
.badge { display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.78rem; font-weight: 600; background: var(--accent); color: var(--primary-dark); }
.badge-sm { padding: 2px 10px; font-size: 0.72rem; }
.tag { display: inline-block; padding: 6px 16px; border-radius: 50px; font-size: 0.82rem; background: var(--bg-alt); color: var(--text-light); border: 1px solid var(--border); transition: var(--transition); cursor: default; }
.tag:hover { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }

/* ===== Header & Nav ===== */
.header { background: var(--text-inverse); border-bottom: 1px solid var(--border-light); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo i { color: var(--accent); font-size: 1.6rem; }
.logo:hover { color: var(--primary); }
.nav-main { display: flex; align-items: center; gap: 8px; }
.nav-main a { padding: 8px 18px; border-radius: 50px; font-size: 0.92rem; font-weight: 500; color: var(--text-light); text-decoration: none; transition: var(--transition); position: relative; }
.nav-main a:hover { background: var(--bg-alt); color: var(--primary); }
.nav-main a.active { background: var(--primary); color: var(--text-inverse); }
.nav-cta { background: var(--accent); color: var(--primary-dark) !important; font-weight: 700; padding: 8px 24px; border-radius: 50px; }
.nav-cta:hover { background: var(--accent-light) !important; color: var(--primary-dark) !important; transform: translateY(-1px); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--primary); cursor: pointer; padding: 4px; }
@media (max-width: 820px) {
  .nav-toggle { display: block; }
  .nav-main { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: var(--text-inverse); flex-direction: column; padding: 16px 24px 24px; border-bottom: 2px solid var(--border); box-shadow: var(--shadow); gap: 4px; }
  .nav-main.open { display: flex; }
  .nav-main a { width: 100%; padding: 12px 16px; }
  .nav-cta { text-align: center; }
}

/* ===== Hero / Banner ===== */
.article-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-attachment: fixed; }
.article-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,21,37,0.75) 0%, rgba(13,21,37,0.5) 60%, rgba(13,21,37,0.85) 100%); }
.article-hero .container { position: relative; z-index: 2; text-align: center; }
.article-hero .badge { margin-bottom: 20px; }
.article-hero h1 { font-size: 2.6rem; color: var(--text-inverse); max-width: 800px; margin: 0 auto 20px; line-height: 1.3; text-shadow: 0 2px 12px rgba(0,0,0,0.3); }
.article-hero .meta { display: flex; justify-content: center; gap: 24px; color: rgba(255,255,255,0.7); font-size: 0.92rem; flex-wrap: wrap; }
.article-hero .meta i { margin-right: 6px; }

/* ===== Article Content ===== */
.article-content { padding: 64px 0 48px; }
.article-body { max-width: 800px; margin: 0 auto; background: var(--text-inverse); border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 48px 56px; }
.article-body h2 { font-size: 1.6rem; margin-top: 32px; margin-bottom: 12px; }
.article-body h3 { font-size: 1.25rem; margin-top: 24px; margin-bottom: 8px; }
.article-body p { margin-bottom: 18px; color: var(--text); line-height: 1.85; }
.article-body img { border-radius: var(--radius-sm); margin: 24px 0; width: 100%; }
.article-body ul, .article-body ol { margin-bottom: 18px; padding-left: 24px; color: var(--text); }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 6px; }
.article-body blockquote { border-left: 4px solid var(--accent); background: var(--bg-alt); padding: 16px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-light); font-style: italic; }
.article-body a { color: var(--primary-light); text-decoration: underline; }
.article-body a:hover { color: var(--accent); }
@media (max-width: 768px) {
  .article-body { padding: 32px 20px; }
  .article-hero h1 { font-size: 1.8rem; }
}
.article-footer-bar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.article-share { display: flex; align-items: center; gap: 12px; }
.article-share a { width: 40px; height: 40px; border-radius: 50%; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 1.1rem; transition: var(--transition); }
.article-share a:hover { background: var(--accent); color: var(--primary-dark); }
.article-nav { display: flex; justify-content: space-between; gap: 20px; margin-top: 40px; flex-wrap: wrap; }
.article-nav a { flex: 1; min-width: 160px; padding: 16px 20px; border-radius: var(--radius-sm); background: var(--bg-alt); color: var(--text); font-weight: 500; transition: var(--transition); display: flex; flex-direction: column; gap: 4px; }
.article-nav a:hover { background: var(--primary); color: var(--text-inverse); }
.article-nav .nav-label { font-size: 0.78rem; opacity: 0.7; }
.article-nav .nav-title { font-size: 0.95rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.article-nav .nav-right { text-align: right; }

/* ===== Related ===== */
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1024px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .related-grid { grid-template-columns: 1fr; } }

/* ===== FAQ ===== */
.faq-grid { max-width: 760px; margin: 0 auto; }
.faq-item { background: var(--text-inverse); border-radius: var(--radius-sm); box-shadow: var(--shadow); margin-bottom: 16px; overflow: hidden; transition: var(--transition); }
.faq-item summary { padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 1.05rem; color: var(--primary); display: flex; align-items: center; gap: 12px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--accent); font-size: 1.1rem; transition: var(--transition); }
.faq-item[open] summary i { transform: rotate(45deg); }
.faq-item .faq-answer { padding: 0 24px 20px; color: var(--text-light); line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { text-align: center; padding: 80px 0; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: var(--text-inverse); }
.cta-section h2 { color: var(--text-inverse); margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 28px; }
.cta-section .btn { margin: 0 8px; }

/* ===== Not Found ===== */
.not-found-box { text-align: center; padding: 80px 20px; }
.not-found-box i { font-size: 4rem; color: var(--accent); margin-bottom: 24px; }
.not-found-box h2 { font-size: 2rem; margin-bottom: 12px; }
.not-found-box p { max-width: 480px; margin: 0 auto 24px; }

/* ===== Footer ===== */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 64px 0 0; }
.footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
.footer-brand .logo { color: var(--text-inverse); margin-bottom: 16px; }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-bottom: 20px; max-width: 360px; }
.footer-social { display: flex; gap: 12px; }
.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(255,255,255,0.6); font-size: 1.1rem; transition: var(--transition); }
.footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
.footer h4 { color: var(--text-inverse); font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { color: rgba(255,255,255,0.55); font-size: 0.88rem; transition: var(--transition); }
.footer ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.82rem; color: rgba(255,255,255,0.4); }

/* ===== Breadcrumb ===== */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-bottom: 20px; justify-content: center; flex-wrap: wrap; }
.breadcrumb a { color: rgba(255,255,255,0.7); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: rgba(255,255,255,0.4); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .article-hero { padding: 60px 0 48px; }
  .article-hero h1 { font-size: 1.6rem; }
  .article-body { padding: 24px 16px; }
  .article-footer-bar { flex-direction: column; align-items: flex-start; }
  .article-nav { flex-direction: column; }
  .article-nav a { min-width: auto; }
  .cta-section { padding: 48px 20px; }
  .faq-item summary { padding: 16px 18px; font-size: 0.95rem; }
}
@media (max-width: 520px) {
  .article-hero h1 { font-size: 1.35rem; }
  .article-hero .meta { gap: 12px; font-size: 0.82rem; }
  .article-body { padding: 20px 12px; border-radius: var(--radius); }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7c;
            --primary-dark: #0f1a30;
            --accent: #f0b830;
            --accent-light: #f5d070;
            --accent-dark: #d49a10;
            --bg-dark: #0b1424;
            --bg-card: #ffffff;
            --bg-section: #f5f7fb;
            --bg-section-alt: #eef1f7;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border: #e0e4ed;
            --border-light: #f0f2f6;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --gap: 24px;
            --container: 1200px;
            --nav-height: 60px;
        }

        /* ===== 基础 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 20, 36, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }

        .logo i {
            color: var(--accent);
            font-size: 1.2em;
            transition: transform var(--transition);
        }

        .logo:hover i {
            transform: rotate(20deg) scale(1.1);
        }

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

        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: all var(--transition);
            position: relative;
        }

        .nav-main a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-main a.active {
            color: var(--accent);
            background: rgba(240, 184, 48, 0.12);
        }

        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-white);
            border-radius: 4px;
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 120px 0 80px;
            background: var(--bg-dark);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }

        .page-banner .bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            opacity: 0.30;
            z-index: 1;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 20, 36, 0.92) 0%, rgba(11, 20, 36, 0.70) 50%, rgba(11, 20, 36, 0.92) 100%);
            z-index: 2;
        }

        .page-banner .container {
            position: relative;
            z-index: 3;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }

        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 680px;
            margin: 0 auto 20px;
            line-height: 1.8;
        }

        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 8px;
        }

        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }

        .page-banner .breadcrumb a:hover {
            color: var(--accent);
        }

        .page-banner .breadcrumb span {
            color: var(--accent);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
            background: var(--bg-section);
        }

        .section-alt {
            background: var(--bg-section-alt);
        }

        .section-dark {
            background: var(--primary-dark);
            color: var(--text-white);
        }

        .section-dark h2,
        .section-dark h3,
        .section-dark .section-sub {
            color: var(--text-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-header .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto;
        }

        .section-header h2 i {
            color: var(--accent);
            margin-right: 10px;
        }

        .section-dark .section-header h2 {
            color: var(--text-white);
        }

        .section-dark .section-header .section-sub {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== 网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }

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

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }

        .card-body {
            padding: 24px 20px 22px;
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .card-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .card-body .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(240, 184, 48, 0.12);
            color: var(--accent-dark);
            margin-bottom: 10px;
        }

        .card-footer {
            padding: 14px 20px;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.83rem;
            color: var(--text-light);
        }

        .card-footer a {
            color: var(--primary-light);
            font-weight: 500;
        }

        .card-footer a:hover {
            color: var(--accent-dark);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            border: 2px solid transparent;
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 184, 48, 0.30);
        }

        .btn:active {
            transform: translateY(0);
            box-shadow: none;
        }

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

        .btn-outline:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-white {
            background: var(--text-white);
            color: var(--primary-dark);
        }

        .btn-white:hover {
            background: rgba(255, 255, 255, 0.85);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.20);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(240, 184, 48, 0.14);
            color: var(--accent-dark);
        }

        .badge-primary {
            background: rgba(26, 42, 74, 0.08);
            color: var(--primary);
        }

        .badge-white {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-white);
        }

        /* ===== 流程 / 步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            counter-reset: step;
        }

        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }

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

        .step-item .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            transition: all var(--transition);
        }

        .step-item:hover .step-num {
            transform: scale(1.08);
            box-shadow: 0 0 0 6px rgba(240, 184, 48, 0.20);
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 图文区块 ===== */
        .text-image {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .text-image.reverse {
            direction: rtl;
        }

        .text-image.reverse>* {
            direction: ltr;
        }

        .text-image .ti-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .text-image .ti-content p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .text-image .ti-content ul {
            padding-left: 0;
        }

        .text-image .ti-content ul li {
            padding-left: 24px;
            position: relative;
            margin-bottom: 8px;
            color: var(--text-secondary);
        }

        .text-image .ti-content ul li::before {
            content: '✦';
            position: absolute;
            left: 0;
            color: var(--accent);
            font-size: 0.9rem;
        }

        .text-image .ti-img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(240, 184, 48, 0.04);
        }

        .faq-question i {
            transition: transform var(--transition);
            color: var(--accent);
            font-size: 0.9rem;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }

        .cta-section .bg-overlay {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 1;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 20, 36, 0.94) 0%, rgba(26, 42, 74, 0.80) 100%);
            z-index: 2;
        }

        .cta-section .container {
            position: relative;
            z-index: 3;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 580px;
            margin: 0 auto 30px;
        }

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

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            text-align: center;
        }

        .stat-item {
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .stat-item .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            border-top: 3px solid var(--accent);
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer .logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            margin-top: 8px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 18px;
        }

        .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, 0.70);
            font-size: 1.1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }

        .footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

        .footer ul li a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.60);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            padding: 22px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom span:last-child {
            color: var(--accent);
            font-weight: 500;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .page-banner h1 {
                font-size: 2.4rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(11, 20, 36, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

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

            .nav-main a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }

            .nav-toggle {
                display: flex;
            }

            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-2,
            .text-image {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .text-image.reverse {
                direction: ltr;
            }
            .steps {
                grid-template-columns: 1fr;
            }
            .page-banner {
                padding: 100px 0 60px;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.9rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section {
                padding: 52px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item .stat-num {
                font-size: 1.8rem;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .grid-3,
            .grid-4,
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner p {
                font-size: 0.92rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .footer {
                padding: 36px 0 0;
            }
        }

        /* focus 可访问性 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* 选中高亮 */
        ::selection {
            background: var(--accent);
            color: var(--primary-dark);
        }