/* roulang page: index */
:root {
  --primary: #0b1d3a;
  --primary-light: #132d54;
  --primary-dark: #070f1f;
  --accent: #d4a84b;
  --accent-hover: #c4983a;
  --accent-light: #f0d89a;
  --bg-white: #ffffff;
  --bg-light: #f4f6f9;
  --bg-dark: #0b1d3a;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --text-white: #ffffff;
  --border: #e5e7eb;
  --border-light: #f0f0f0;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-accent: 0 4px 20px rgba(212,168,75,0.3);
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --transition: 0.3s ease;
  --max-width: 1200px;
  --header-h: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-base); font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg-white); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; transition: color 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: 1rem; outline: none; }
button { cursor: pointer; border: none; background: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }
.section { padding: 80px 0; }
.section-sm { padding: 56px 0; }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-light { background: var(--bg-light); }
.section-title { font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 12px; letter-spacing: -0.5px; }
.section-subtitle { font-size: 1.05rem; text-align: center; color: var(--text-light); max-width: 640px; margin: 0 auto 48px; line-height: 1.6; }
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .section-sm { padding: 36px 0; }
  .section-title { font-size: 1.6rem; }
  .section-subtitle { font-size: 0.95rem; margin-bottom: 32px; }
}
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius); font-weight: 600; font-size: 0.95rem; transition: all var(--transition); line-height: 1.4; text-align: center; }
.btn-primary { background: var(--accent); color: var(--primary-dark); box-shadow: var(--shadow-accent); }
.btn-primary:hover { background: var(--accent-hover); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(212,168,75,0.4); }
.btn-outline { border: 2px solid var(--accent); color: var(--accent); background: transparent; }
.btn-outline:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); }
.btn-white { background: var(--bg-white); color: var(--primary); box-shadow: var(--shadow); }
.btn-white:hover { background: var(--bg-light); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-lg { padding: 16px 40px; font-size: 1.05rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
@media (max-width: 768px) {
  .btn { padding: 10px 22px; font-size: 0.9rem; }
  .btn-lg { padding: 14px 32px; font-size: 0.95rem; }
}
.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-light { background: rgba(212,168,75,0.15); color: var(--accent); }
.badge-sm { padding: 2px 10px; font-size: 0.7rem; }
.card { background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: all var(--transition); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-body { padding: 20px 24px 24px; }
.card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.card-text { font-size: 0.92rem; color: var(--text-light); line-height: 1.6; }
@media (max-width: 768px) {
  .card-body { padding: 16px 18px 20px; }
  .card-title { font-size: 1rem; }
}
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.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-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 20px; }
}
/* Header */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: var(--bg-white); box-shadow: 0 1px 3px rgba(0,0,0,0.06); height: var(--header-h); transition: all var(--transition); }
.header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--header-h); }
.logo { font-size: 1.4rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; display: flex; align-items: center; gap: 8px; }
.logo i { color: var(--accent); font-size: 1.5rem; }
.logo:hover { color: var(--primary); }
.logo span { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 8px; }
.nav a { padding: 8px 18px; border-radius: var(--radius-sm); font-weight: 500; color: var(--text); font-size: 0.92rem; transition: all var(--transition); position: relative; }
.nav a:hover { background: var(--bg-light); color: var(--primary); }
.nav a.active { background: var(--primary); color: var(--text-white); }
.nav a.active:hover { background: var(--primary-light); }
.nav-cta { background: var(--accent) !important; color: var(--primary-dark) !important; font-weight: 700; padding: 8px 20px !important; border-radius: var(--radius) !important; }
.nav-cta:hover { background: var(--accent-hover) !important; color: var(--primary-dark) !important; transform: translateY(-1px); }
.menu-toggle { display: none; font-size: 1.5rem; color: var(--primary); padding: 8px; border-radius: var(--radius-sm); cursor: pointer; background: none; border: none; }
.menu-toggle:hover { background: var(--bg-light); }
@media (max-width: 768px) {
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .nav { position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 16px 24px 24px; gap: 4px; box-shadow: 0 12px 32px rgba(0,0,0,0.1); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: all 0.4s ease; border-radius: 0 0 var(--radius) var(--radius); }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-cta { margin-top: 8px; text-align: center; }
}
/* Hero */
.hero { position: relative; min-height: 92vh; display: flex; align-items: center; justify-content: center; margin-top: var(--header-h); overflow: hidden; background: var(--primary-dark); }
.hero-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-1.png'); background-size: cover; background-position: center; background-repeat: no-repeat; opacity: 0.3; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(11,29,58,0.92) 0%, rgba(11,29,58,0.7) 50%, rgba(11,29,58,0.88) 100%); }
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; padding: 40px 24px; }
.hero-badge { display: inline-block; padding: 6px 20px; border-radius: 50px; background: rgba(212,168,75,0.2); color: var(--accent); font-size: 0.85rem; font-weight: 600; margin-bottom: 24px; border: 1px solid rgba(212,168,75,0.3); }
.hero-title { font-size: 3.2rem; font-weight: 800; color: var(--text-white); line-height: 1.2; margin-bottom: 20px; letter-spacing: -1px; }
.hero-title span { color: var(--accent); }
.hero-desc { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 36px; line-height: 1.7; }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-stats { display: flex; align-items: center; justify-content: center; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.1); flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }
@media (max-width: 768px) {
  .hero { min-height: 80vh; }
  .hero-title { font-size: 2rem; }
  .hero-desc { font-size: 1rem; }
  .hero-stats { gap: 24px; }
  .hero-stat-num { font-size: 1.5rem; }
}
/* Features */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { text-align: center; padding: 32px 24px; background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border-light); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-icon { width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--accent-light), var(--accent)); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: var(--primary-dark); }
.feature-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.feature-desc { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
@media (max-width: 1024px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }
/* Categories */
.category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.category-card { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all var(--transition); cursor: pointer; aspect-ratio: 4/3; display: flex; align-items: flex-end; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.category-card-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(11,29,58,0.85) 0%, rgba(11,29,58,0.2) 60%, transparent 100%); }
.category-card-content { position: relative; z-index: 2; padding: 24px 20px; width: 100%; }
.category-card-title { font-size: 1.15rem; font-weight: 700; color: var(--text-white); margin-bottom: 4px; }
.category-card-desc { font-size: 0.85rem; color: rgba(255,255,255,0.7); }
@media (max-width: 1024px) { .category-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .category-grid { grid-template-columns: 1fr; } }
/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card { text-align: center; padding: 32px 20px; background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow); position: relative; border: 1px solid var(--border-light); transition: all var(--transition); }
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step-num { width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: var(--text-white); font-size: 1.2rem; font-weight: 700; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; position: relative; z-index: 1; }
.step-card:nth-child(even) .step-num { background: var(--accent); color: var(--primary-dark); }
.step-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.step-desc { font-size: 0.88rem; color: var(--text-light); line-height: 1.5; }
.step-connector { display: none; }
@media (max-width: 1024px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .steps { grid-template-columns: 1fr; gap: 16px; } }
/* Posts List */
.post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.post-card { display: flex; gap: 20px; background: var(--bg-white); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: all var(--transition); border: 1px solid var(--border-light); }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.post-thumb { width: 160px; min-height: 120px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
.post-info { flex: 1; display: flex; flex-direction: column; justify-content: center; }
.post-cat { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--accent); background: rgba(212,168,75,0.12); padding: 2px 12px; border-radius: 50px; margin-bottom: 6px; width: fit-content; }
.post-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; line-height: 1.4; }
.post-title a { color: var(--text); }
.post-title a:hover { color: var(--accent); }
.post-excerpt { font-size: 0.88rem; color: var(--text-light); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-meta { font-size: 0.78rem; color: var(--text-light); margin-top: 8px; display: flex; align-items: center; gap: 12px; }
.post-empty { grid-column: 1 / -1; text-align: center; padding: 40px; color: var(--text-light); font-size: 0.95rem; background: var(--bg-light); border-radius: var(--radius); }
@media (max-width: 768px) {
  .post-list { grid-template-columns: 1fr; }
  .post-card { flex-direction: column; padding: 16px; }
  .post-thumb { width: 100%; min-height: 180px; }
}
/* FAQ */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-white); border-radius: var(--radius); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); overflow: hidden; transition: all var(--transition); }
.faq-item:hover { box-shadow: var(--shadow); }
.faq-q { padding: 18px 24px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-weight: 600; font-size: 0.98rem; gap: 16px; user-select: none; }
.faq-q i { font-size: 0.85rem; color: var(--accent); transition: transform var(--transition); flex-shrink: 0; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { padding: 0 24px 0; max-height: 0; overflow: hidden; transition: all 0.35s ease; color: var(--text-light); font-size: 0.92rem; line-height: 1.7; }
.faq-item.open .faq-a { padding: 0 24px 20px; max-height: 300px; }
@media (max-width: 768px) {
  .faq-q { padding: 14px 18px; font-size: 0.92rem; }
  .faq-a { font-size: 0.88rem; }
}
/* CTA */
.cta-block { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: var(--radius-lg); padding: 56px 48px; text-align: center; position: relative; overflow: hidden; }
.cta-block::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.08; }
.cta-content { position: relative; z-index: 2; }
.cta-title { font-size: 2rem; font-weight: 800; color: var(--text-white); margin-bottom: 12px; }
.cta-desc { font-size: 1.05rem; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 28px; }
.cta-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
@media (max-width: 768px) {
  .cta-block { padding: 36px 24px; }
  .cta-title { font-size: 1.5rem; }
  .cta-desc { font-size: 0.95rem; }
}
/* Footer */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 48px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
.footer-brand .logo { color: var(--text-white); margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-title { font-size: 1rem; font-weight: 700; color: var(--text-white); margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: all var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom { margin-top: 32px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
/* Back to top */
.back-top { position: fixed; bottom: 32px; right: 32px; z-index: 999; width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--primary-dark); font-size: 1.2rem; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all var(--transition); cursor: pointer; border: none; }
.back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
@media (max-width: 768px) { .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1rem; } }
/* Utility */
.text-center { text-align: center; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-12 { margin-bottom: 12px; }
.mb-24 { margin-bottom: 24px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }
/* inner pages banner */
.page-banner { position: relative; padding: 120px 0 80px; margin-top: var(--header-h); background: var(--primary-dark); overflow: hidden; }
.page-banner-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: 0.15; }
.page-banner-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(11,29,58,0.92) 0%, rgba(11,29,58,0.7) 100%); }
.page-banner-content { position: relative; z-index: 2; text-align: center; }
.page-banner-title { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 12px; }
.page-banner-desc { font-size: 1.05rem; color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto; }
@media (max-width: 768px) {
  .page-banner { padding: 100px 0 48px; }
  .page-banner-title { font-size: 1.7rem; }
  .page-banner-desc { font-size: 0.92rem; }
}
/* Article page */
.article-wrap { max-width: 820px; margin: 0 auto; }
.article-header { margin-bottom: 32px; }
.article-cat { display: inline-block; font-size: 0.82rem; font-weight: 600; color: var(--accent); background: rgba(212,168,75,0.12); padding: 4px 16px; border-radius: 50px; margin-bottom: 12px; }
.article-title { font-size: 2rem; font-weight: 800; line-height: 1.3; margin-bottom: 12px; }
.article-meta { display: flex; align-items: center; gap: 20px; font-size: 0.85rem; color: var(--text-light); flex-wrap: wrap; }
.article-body { font-size: 1.02rem; line-height: 1.9; color: var(--text); }
.article-body p { margin-bottom: 18px; }
.article-body h2, .article-body h3 { margin-top: 32px; margin-bottom: 12px; font-weight: 700; }
.article-body h2 { font-size: 1.5rem; }
.article-body h3 { font-size: 1.2rem; }
.article-body ul, .article-body ol { margin-bottom: 18px; padding-left: 24px; }
.article-body li { margin-bottom: 8px; }
.article-body img { border-radius: var(--radius); margin: 24px 0; }
.article-body blockquote { border-left: 4px solid var(--accent); padding: 16px 20px; background: var(--bg-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin: 24px 0; font-style: italic; }
.article-not-found { text-align: center; padding: 60px 24px; }
.article-not-found h2 { font-size: 1.6rem; margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; }
@media (max-width: 768px) {
  .article-title { font-size: 1.5rem; }
  .article-body { font-size: 0.96rem; }
}
/* Category intro */
.cat-intro { background: var(--bg-light); border-radius: var(--radius); padding: 32px; margin-bottom: 32px; }
.cat-intro h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 12px; }
.cat-intro p { color: var(--text-light); line-height: 1.7; }
@media (max-width: 768px) { .cat-intro { padding: 24px; } }

/* roulang page: category1 */
/* ========== :root 设计变量 ========== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f1f33;
            --accent: #e8b830;
            --accent-light: #f0d060;
            --accent-dark: #c9a020;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f1f33;
            --bg-section-alt: #f0f3f8;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #7a8a9a;
            --text-inverse: #ffffff;
            --border-color: #e4e8ef;
            --border-light: #f0f2f6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 58, 92, 0.10);
            --shadow-lg: 0 14px 40px rgba(26, 58, 92, 0.14);
            --shadow-accent: 0 4px 16px rgba(232, 184, 48, 0.30);
            --transition: all 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ========== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ========== Header / Nav ========== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            z-index: 1000;
            transition: var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo i.fa-bolt {
            color: var(--accent);
            font-size: 26px;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover {
            color: var(--primary);
        }

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

        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }

        .nav a:hover {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.05);
        }

        .nav a.active {
            color: var(--primary);
            background: rgba(26, 58, 92, 0.08);
            font-weight: 600;
        }

        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .nav a.nav-cta {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-accent);
        }
        .nav a.nav-cta:hover {
            background: var(--accent-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 184, 48, 0.40);
        }
        .nav a.nav-cta i {
            margin-right: 6px;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 28px;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .menu-toggle:hover {
            background: rgba(26, 58, 92, 0.05);
        }

        /* ========== 页面 Banner ========== */
        .page-banner {
            margin-top: var(--header-h);
            padding: 80px 0 70px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(232, 184, 48, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 42px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 20px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-banner .breadcrumb span {
            color: var(--accent);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-inverse);
        }

        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.4px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 12px auto 0;
        }
        .section-title .badge-title {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 30px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ========== 卡片网格 ========== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }

        .card-body {
            padding: 24px 22px 26px;
        }
        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .card-body h3 a {
            color: var(--primary);
        }
        .card-body h3 a:hover {
            color: var(--accent-dark);
        }
        .card-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .card-body .tag {
            display: inline-block;
            background: var(--bg-section-alt);
            color: var(--primary-light);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 30px;
            margin-right: 6px;
            margin-bottom: 6px;
        }
        .card-body .tag-accent {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .card-footer-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary-light);
            font-size: 14px;
            margin-top: 8px;
        }
        .card-footer-link i {
            font-size: 12px;
            transition: var(--transition);
        }
        .card-footer-link:hover i {
            transform: translateX(4px);
        }

        /* ========== 步骤流程 ========== */
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 24px 30px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-item::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 32px;
            font-weight: 900;
            color: rgba(26, 58, 92, 0.06);
            line-height: 1;
            letter-spacing: -1px;
        }
        .step-item .step-icon {
            font-size: 40px;
            color: var(--primary);
            background: var(--bg-section-alt);
            width: 72px;
            height: 72px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            transition: var(--transition);
        }
        .step-item:hover .step-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== 功能特点 ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .feature-item {
            display: flex;
            gap: 18px;
            background: var(--bg-white);
            padding: 24px 22px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .feature-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .feature-item .fi-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: var(--bg-section-alt);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-item:hover .fi-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .feature-item .fi-content h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .feature-item .fi-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            font-size: 14px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-inverse);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 700;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 48, 0.45);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-inverse);
            border: 2px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }

        /* ========== 统计数字 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-item .stat-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-number span {
            color: var(--accent);
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
            font-weight: 500;
        }

        /* ========== 图文区块 ========== */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .media-block.reverse {
            direction: rtl;
        }
        .media-block.reverse>* {
            direction: ltr;
        }
        .media-block .media-img img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: auto;
        }
        .media-block .media-text h3 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .media-block .media-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .media-block .media-text ul {
            margin-top: 12px;
        }
        .media-block .media-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }
        .media-block .media-text ul li i {
            color: var(--accent);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 0;
        }
        .footer .container {
            padding-bottom: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            font-size: 24px;
            color: var(--text-inverse);
            margin-bottom: 14px;
        }
        .footer-brand .logo i.fa-bolt {
            color: var(--accent);
        }
        .footer-brand .logo span {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a,
        .footer-links span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.60);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-links span i {
            width: 20px;
            color: var(--accent);
            margin-right: 6px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --header-h: 64px;
            }

            .menu-toggle {
                display: block;
            }

            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: var(--bg-white);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav a.active::after {
                display: none;
            }
            .nav a.nav-cta {
                margin-top: 8px;
                text-align: center;
            }

            .page-banner {
                padding: 60px 0 50px;
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 16px;
            }

            .section {
                padding: 52px 0;
            }
            .section-title h2 {
                font-size: 26px;
            }

            .grid-3,
            .grid-2,
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .media-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .media-block.reverse {
                direction: ltr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 26px;
            }
            .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
            .card-body {
                padding: 18px 16px 20px;
            }
            .card-img {
                height: 160px;
            }
            .step-item {
                padding: 24px 18px 22px;
            }
            .feature-item {
                flex-direction: column;
                text-align: center;
                padding: 20px 16px;
            }
            .feature-item .fi-icon {
                margin: 0 auto;
            }
            .btn {
                width: 100%;
                justify-content: center;
                padding: 14px 20px;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

/* roulang page: article */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#0f1b2d;
  --primary-light:#1a2d4a;
  --primary-dark:#08101a;
  --accent:#f5a623;
  --accent-hover:#e09515;
  --accent-light:rgba(245,166,35,0.12);
  --bg:#ffffff;
  --bg-alt:#f7f8fa;
  --bg-dark:#0a1424;
  --text:#1a1a2e;
  --text-light:#6b7280;
  --text-white:#ffffff;
  --border:#e5e7eb;
  --shadow:0 4px 20px rgba(0,0,0,0.07);
  --shadow-hover:0 12px 40px rgba(0,0,0,0.12);
  --shadow-lg:0 24px 60px rgba(0,0,0,0.15);
  --radius:12px;
  --radius-sm:8px;
  --radius-lg:20px;
  --radius-xl:28px;
  --transition:0.3s cubic-bezier(0.4,0,0.2,1);
  --font:'Segoe UI',system-ui,-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;
  --container:1200px;
  --nav-height:72px;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent-hover)}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}
/* header */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(15,27,45,0.95);backdrop-filter:blur(20px);border-bottom:1px solid rgba(255,255,255,0.06);height:var(--nav-height);transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--text-white);letter-spacing:-0.5px}
.logo i{color:var(--accent);font-size:24px}
.logo span{color:var(--accent);font-weight:700}
.nav{display:flex;align-items:center;gap:8px}
.nav a{color:rgba(255,255,255,0.75);padding:8px 18px;border-radius:var(--radius-sm);font-size:15px;font-weight:500;transition:var(--transition);position:relative}
.nav a:hover,.nav a.active{color:var(--text-white);background:rgba(255,255,255,0.08)}
.nav a.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--accent);border-radius:2px}
.nav a.nav-cta{background:var(--accent);color:var(--primary-dark);font-weight:700;padding:8px 22px;border-radius:var(--radius-sm);box-shadow:0 4px 16px rgba(245,166,35,0.35)}
.nav a.nav-cta:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 8px 28px rgba(245,166,35,0.45);color:var(--primary-dark)}
.nav-toggle{display:none;background:none;border:none;color:var(--text-white);font-size:26px;cursor:pointer;padding:6px;border-radius:6px;transition:var(--transition)}
.nav-toggle:hover{background:rgba(255,255,255,0.08)}
@media(max-width:900px){
  .nav-toggle{display:block}
  .nav{position:fixed;top:var(--nav-height);left:0;right:0;background:rgba(15,27,45,0.98);backdrop-filter:blur(20px);flex-direction:column;padding:20px 24px 28px;gap:6px;border-bottom:1px solid rgba(255,255,255,0.08);transform:translateY(-120%);opacity:0;pointer-events:none;transition:var(--transition);border-radius:0 0 var(--radius-lg) var(--radius-lg)}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav a{width:100%;padding:12px 18px;font-size:16px}
  .nav a.nav-cta{text-align:center}
}
/* hero banner */
.article-hero{position:relative;padding:140px 0 80px;margin-top:var(--nav-height);background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 60%,var(--primary-light) 100%);overflow:hidden;min-height:320px;display:flex;align-items:center}
.article-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:0.15;z-index:0}
.article-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(245,166,35,0.08) 0%,transparent 70%);z-index:0}
.article-hero .container{position:relative;z-index:1}
.article-hero .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,0.5);margin-bottom:20px;flex-wrap:wrap}
.article-hero .breadcrumb a{color:rgba(255,255,255,0.6);transition:var(--transition)}
.article-hero .breadcrumb a:hover{color:var(--accent)}
.article-hero .breadcrumb i{font-size:10px;color:rgba(255,255,255,0.3)}
.article-hero .badge{display:inline-block;padding:4px 16px;border-radius:20px;font-size:12px;font-weight:600;background:var(--accent-light);color:var(--accent);margin-bottom:16px;letter-spacing:0.3px}
.article-hero h1{font-size:38px;font-weight:800;color:var(--text-white);line-height:1.25;margin-bottom:16px;max-width:820px}
.article-hero .meta{display:flex;align-items:center;gap:20px;flex-wrap:wrap;font-size:14px;color:rgba(255,255,255,0.6)}
.article-hero .meta i{margin-right:4px;color:var(--accent)}
@media(max-width:768px){
  .article-hero{padding:120px 0 48px;min-height:240px}
  .article-hero h1{font-size:26px}
  .article-hero .meta{gap:12px;font-size:13px}
}
/* main content layout */
.main-content{padding:48px 0 64px;background:var(--bg-alt)}
.main-content .container{display:grid;grid-template-columns:1fr 340px;gap:48px}
@media(max-width:1024px){.main-content .container{grid-template-columns:1fr;gap:40px}}
.content-body{min-width:0}
.content-body .article-text{background:var(--bg);border-radius:var(--radius-lg);padding:48px;box-shadow:var(--shadow);line-height:1.9;font-size:16px;color:var(--text)}
.content-body .article-text h2{font-size:24px;font-weight:700;margin:36px 0 16px;color:var(--primary);border-left:4px solid var(--accent);padding-left:16px}
.content-body .article-text h3{font-size:20px;font-weight:600;margin:28px 0 12px;color:var(--primary-light)}
.content-body .article-text p{margin-bottom:18px}
.content-body .article-text ul,.content-body .article-text ol{margin:0 0 18px 24px}
.content-body .article-text li{margin-bottom:8px}
.content-body .article-text img{border-radius:var(--radius);margin:24px 0;width:100%}
.content-body .article-text a{color:var(--accent);font-weight:500;border-bottom:1px solid transparent}
.content-body .article-text a:hover{border-bottom-color:var(--accent)}
.content-body .article-text blockquote{border-left:4px solid var(--accent);background:var(--accent-light);padding:16px 24px;margin:20px 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic;color:var(--text-light)}
@media(max-width:768px){
  .content-body .article-text{padding:24px 20px}
  .content-body .article-text h2{font-size:20px}
  .content-body .article-text h3{font-size:18px}
}
/* sidebar */
.sidebar{display:flex;flex-direction:column;gap:28px}
.sidebar-card{background:var(--bg);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);border:1px solid var(--border)}
.sidebar-card .sc-title{font-size:16px;font-weight:700;color:var(--primary);margin-bottom:16px;display:flex;align-items:center;gap:10px}
.sidebar-card .sc-title i{color:var(--accent);font-size:18px}
.sidebar-card .sc-list{display:flex;flex-direction:column;gap:10px}
.sidebar-card .sc-list a{color:var(--text);font-size:14px;padding:10px 14px;border-radius:var(--radius-sm);background:var(--bg-alt);transition:var(--transition);display:flex;align-items:center;gap:10px}
.sidebar-card .sc-list a:hover{background:var(--accent-light);color:var(--primary);transform:translateX(4px)}
.sidebar-card .sc-list a i{color:var(--accent);font-size:12px;width:16px;text-align:center}
.sidebar-card .tags{display:flex;flex-wrap:wrap;gap:8px}
.sidebar-card .tags a{display:inline-block;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:500;background:var(--bg-alt);color:var(--text-light);transition:var(--transition);border:1px solid var(--border)}
.sidebar-card .tags a:hover{background:var(--accent-light);color:var(--accent);border-color:var(--accent)}
.sidebar-cta{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);border-radius:var(--radius-lg);padding:32px 28px;text-align:center;color:var(--text-white);border:none}
.sidebar-cta h4{font-size:20px;font-weight:700;margin-bottom:10px}
.sidebar-cta p{font-size:14px;opacity:0.85;margin-bottom:20px;line-height:1.6}
.sidebar-cta .btn-accent{display:inline-block;background:var(--accent);color:var(--primary-dark);padding:12px 32px;border-radius:var(--radius-sm);font-weight:700;font-size:15px;transition:var(--transition);box-shadow:0 4px 16px rgba(245,166,35,0.35)}
.sidebar-cta .btn-accent:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 28px rgba(245,166,35,0.45);color:var(--primary-dark)}
/* not found */
.not-found{text-align:center;padding:80px 24px;background:var(--bg);border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.not-found i{font-size:56px;color:var(--accent);margin-bottom:20px;opacity:0.7}
.not-found h2{font-size:28px;font-weight:700;color:var(--primary);margin-bottom:12px}
.not-found p{color:var(--text-light);margin-bottom:24px;font-size:16px}
.not-found .btn-home{display:inline-block;background:var(--accent);color:var(--primary-dark);padding:12px 36px;border-radius:var(--radius-sm);font-weight:700;transition:var(--transition)}
.not-found .btn-home:hover{background:var(--accent-hover);transform:translateY(-2px)}
/* related */
.related{padding:56px 0;background:var(--bg)}
.related-title{font-size:28px;font-weight:800;color:var(--primary);text-align:center;margin-bottom:12px}
.related-desc{text-align:center;color:var(--text-light);font-size:15px;margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:900px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.related-grid{grid-template-columns:1fr}}
.related-card{background:var(--bg);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:var(--transition);display:flex;flex-direction:column}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:transparent}
.related-card .rc-img{height:180px;background:var(--bg-alt);position:relative;overflow:hidden}
.related-card .rc-img img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.related-card:hover .rc-img img{transform:scale(1.05)}
.related-card .rc-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.related-card .rc-body .rc-cat{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:0.5px;color:var(--accent);margin-bottom:6px}
.related-card .rc-body h3{font-size:17px;font-weight:700;color:var(--primary);line-height:1.4;margin-bottom:8px}
.related-card .rc-body p{font-size:13px;color:var(--text-light);line-height:1.6;flex:1;margin-bottom:12px}
.related-card .rc-body .rc-meta{font-size:12px;color:var(--text-light);display:flex;align-items:center;gap:12px}
.related-card .rc-body .rc-meta i{color:var(--accent);font-size:11px;margin-right:2px}
/* cta */
.cta-section{padding:72px 0;background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.08;z-index:0}
.cta-section .container{position:relative;z-index:1;text-align:center}
.cta-section h2{font-size:34px;font-weight:800;color:var(--text-white);margin-bottom:14px}
.cta-section p{font-size:17px;color:rgba(255,255,255,0.7);max-width:620px;margin:0 auto 32px;line-height:1.7}
.cta-section .cta-group{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section .btn-primary{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:var(--primary-dark);padding:14px 38px;border-radius:var(--radius-sm);font-weight:700;font-size:16px;transition:var(--transition);box-shadow:0 4px 20px rgba(245,166,35,0.35)}
.cta-section .btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 32px rgba(245,166,35,0.45);color:var(--primary-dark)}
.cta-section .btn-outline{display:inline-flex;align-items:center;gap:10px;background:transparent;color:var(--text-white);padding:13px 32px;border-radius:var(--radius-sm);font-weight:600;font-size:15px;border:2px solid rgba(255,255,255,0.25);transition:var(--transition)}
.cta-section .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
@media(max-width:768px){
  .cta-section h2{font-size:26px}
  .cta-section p{font-size:15px}
  .cta-section .cta-group{flex-direction:column}
}
/* footer */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.7);padding:56px 0 0;border-top:1px solid rgba(255,255,255,0.06)}
.footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.06)}
@media(max-width:900px){.footer .footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:560px){.footer .footer-grid{grid-template-columns:1fr}}
.footer .footer-brand .logo{font-size:24px;margin-bottom:14px;display:inline-flex}
.footer .footer-brand p{font-size:14px;line-height:1.7;max-width:360px;color:rgba(255,255,255,0.55)}
.footer .footer-title{font-size:15px;font-weight:700;color:var(--text-white);margin-bottom:18px;letter-spacing:0.3px}
.footer .footer-links{display:flex;flex-direction:column;gap:10px}
.footer .footer-links a,.footer .footer-links span{color:rgba(255,255,255,0.55);font-size:14px;transition:var(--transition);display:flex;align-items:center;gap:8px}
.footer .footer-links a:hover{color:var(--accent);transform:translateX(4px)}
.footer .footer-links i{color:var(--accent);font-size:13px;width:16px;text-align:center}
.footer .footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:24px 0;font-size:13px;color:rgba(255,255,255,0.4)}
.footer .footer-bottom a{color:rgba(255,255,255,0.5);transition:var(--transition)}
.footer .footer-bottom a:hover{color:var(--accent)}
@media(max-width:600px){.footer .footer-bottom{flex-direction:column;text-align:center}}
/* utilities */
.text-center{text-align:center}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}