/* roulang page: index */
:root {
  --primary: #1a4b8c;
  --primary-light: #2d6bb5;
  --primary-dark: #0f3460;
  --accent: #e8a838;
  --accent-dark: #c88a1e;
  --bg: #f5f7fb;
  --bg-white: #ffffff;
  --text: #1e2a38;
  --text-light: #5a6b7d;
  --text-lighter: #8a99a9;
  --border: #e2e8f0;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(15, 52, 96, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 52, 96, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 52, 96, 0.12);
  --spacing-section: 64px;
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; line-height: 1.7; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== App Shell Layout ===== */
.app-shell { display: flex; min-height: 100vh; }
.sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: 240px; background: var(--primary-dark); z-index: 100; display: flex; flex-direction: column; box-shadow: 4px 0 20px rgba(0,0,0,0.1); }
.sidebar-logo { padding: 24px 20px 18px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.sidebar-logo .logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--accent), #f5c96a); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--primary-dark); flex-shrink: 0; }
.sidebar-logo .logo-text { font-size: 15px; font-weight: 700; color: #fff; line-height: 1.4; letter-spacing: 0.5px; }
.sidebar-nav { padding: 16px 0; flex: 1; overflow-y: auto; }
.sidebar-nav a { display: flex; align-items: center; gap: 12px; padding: 13px 24px; color: rgba(255,255,255,0.75); font-size: 15px; font-weight: 500; transition: var(--transition); border-left: 3px solid transparent; }
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; }
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.active { background: rgba(255,255,255,0.1); color: var(--accent); border-left-color: var(--accent); }
.sidebar-footer { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.08); color: rgba(255,255,255,0.4); font-size: 11px; line-height: 1.5; }
.main-area { margin-left: 240px; flex: 1; min-width: 0; }

/* ===== Mobile Header ===== */
.mobile-header { display: none; position: sticky; top: 0; z-index: 150; background: var(--primary-dark); padding: 12px 16px; align-items: center; justify-content: space-between; }
.mobile-header .sidebar-logo { padding: 0; border: none; }
.mobile-menu-btn { background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; padding: 6px; }
.mobile-nav-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200; opacity: 0; visibility: hidden; transition: var(--transition); }
.mobile-nav-overlay.open { opacity: 1; visibility: visible; }
.mobile-nav-drawer { position: fixed; top: 0; left: 0; bottom: 0; width: 280px; background: var(--primary-dark); z-index: 210; transform: translateX(-100%); transition: transform 0.35s ease; overflow-y: auto; }
.mobile-nav-drawer.open { transform: translateX(0); }

/* ===== Dropdown ===== */
.nav-dropdown { position: relative; }
.nav-dropdown .dropdown-menu { display: none; position: absolute; left: 0; top: calc(100% - 8px); background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); min-width: 220px; padding: 8px 0; z-index: 300; }
.nav-dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a { display: block; padding: 10px 20px; font-size: 14px; color: var(--text); white-space: nowrap; }
.dropdown-menu a:hover { background: var(--bg); color: var(--primary); }

/* ===== Hero ===== */
.hero { position: relative; padding: 80px 0 64px; background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') no-repeat center/cover; opacity: 0.2; }
.hero::after { content: ""; position: absolute; top: -80px; right: -80px; width: 300px; height: 300px; border-radius: 50%; background: rgba(232,168,56,0.15); filter: blur(80px); }
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 640px; }
.hero .badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.2); color: #fff; padding: 6px 16px; border-radius: 30px; font-size: 13px; font-weight: 500; margin-bottom: 24px; backdrop-filter: blur(6px); }
.hero h1 { font-size: 40px; line-height: 1.3; color: #fff; font-weight: 800; margin-bottom: 20px; letter-spacing: 0.5px; }
.hero p { font-size: 18px; line-height: 1.8; color: rgba(255,255,255,0.85); margin-bottom: 36px; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual { position: absolute; right: 40px; bottom: 0; top: 50%; transform: translateY(-50%); width: 380px; height: 380px; border-radius: 24px; overflow: hidden; box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,0.2); }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-md); font-size: 16px; font-weight: 600; transition: var(--transition); cursor: pointer; border: none; }
.btn i { font-size: 15px; }
.btn-primary { background: var(--accent); color: #1a1a1a; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.35); }
.btn-outline-light { background: transparent; border: 2px solid rgba(255,255,255,0.6); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn:focus-visible, a:focus-visible, input:focus-visible { outline: 3px solid rgba(45,107,181,0.5); outline-offset: 2px; }

/* ===== Section ===== */
.section { padding: var(--spacing-section) 0; }
.section-light { background: var(--bg-white); }
.section-gray { background: var(--bg); }
.section-header { margin-bottom: 40px; max-width: 720px; }
.section-header .section-tag { display: inline-block; color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 12px; }
.section-header h2 { font-size: 30px; font-weight: 800; line-height: 1.35; margin-bottom: 14px; color: var(--text); }
.section-header p { font-size: 16px; color: var(--text-light); line-height: 1.8; }
.section-center { margin-left: auto; margin-right: auto; text-align: center; }

/* ===== Cards ===== */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card { background: var(--bg-white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: var(--transition); }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-body { padding: 24px; }
.card-icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 18px; }
.card-icon.blue { background: rgba(26,75,140,0.12); color: var(--primary); }
.card-icon.gold { background: rgba(232,168,56,0.15); color: var(--accent-dark); }
.card-icon.green { background: rgba(16,185,129,0.15); color: #10b981; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--text-light); line-height: 1.75; }

/* ===== Feature Split ===== */
.feature-split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature-visual { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.feature-visual img { width: 100%; height: 340px; object-fit: cover; }
.feature-list { list-style: none; margin-top: 20px; }
.feature-list li { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px dashed var(--border); }
.feature-list li:last-child { border-bottom: none; }
.feature-list li i { color: #10b981; font-size: 18px; margin-top: 4px; flex-shrink: 0; }
.feature-list li strong { display: block; font-size: 15px; margin-bottom: 4px; }
.feature-list li span { font-size: 14px; color: var(--text-light); }

/* ===== Categories ===== */
.cat-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.category-card { background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border); padding: 0; overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.category-card .cat-img { height: 160px; overflow: hidden; position: relative; }
.category-card .cat-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.category-card:hover .cat-img img { transform: scale(1.05); }
.category-card .cat-img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(15,52,96,0.4), transparent); }
.category-card .cat-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.category-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.category-card p { font-size: 13px; color: var(--text-light); line-height: 1.7; flex: 1; }
.category-card .cat-link { margin-top: 14px; font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.category-card .cat-link i { transition: transform 0.3s; }
.category-card:hover .cat-link i { transform: translateX(4px); }

/* ===== Latest Posts ===== */
.post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.post-card { display: flex; background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
.post-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.post-card .post-thumb { width: 160px; min-height: 140px; flex-shrink: 0; overflow: hidden; }
.post-card .post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card .post-content { padding: 18px 20px; flex: 1; display: flex; flex-direction: column; }
.post-card .post-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.post-card .post-cat { font-size: 12px; font-weight: 600; color: var(--accent-dark); background: rgba(232,168,56,0.12); padding: 3px 10px; border-radius: 20px; }
.post-card .post-date { font-size: 12px; color: var(--text-lighter); }
.post-card h3 { font-size: 16px; font-weight: 700; line-height: 1.45; margin-bottom: 8px; }
.post-card h3 a:hover { color: var(--primary); }
.post-card p { font-size: 13px; color: var(--text-light); line-height: 1.7; flex: 1; }
.post-card .read-more { font-size: 13px; font-weight: 600; color: var(--primary); margin-top: 6px; }

/* ===== Stats ===== */
.stats-banner { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%); border-radius: var(--radius-lg); padding: 48px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; overflow: hidden; }
.stats-banner::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') no-repeat center/cover; opacity: 0.08; }
.stat-item { text-align: center; position: relative; z-index: 2; }
.stat-item .stat-num { font-size: 42px; font-weight: 800; color: var(--accent); line-height: 1.2; }
.stat-item .stat-label { font-size: 15px; color: rgba(255,255,255,0.8); margin-top: 6px; }

/* ===== Process ===== */
.process-wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step { text-align: center; padding: 32px 20px; background: var(--bg-white); border-radius: var(--radius-lg); border: 1px solid var(--border); position: relative; transition: var(--transition); }
.process-step:hover { box-shadow: var(--shadow-md); }
.process-step .step-num { width: 44px; height: 44px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; font-weight: 700; margin: 0 auto 16px; }
.process-step h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.process-step p { font-size: 13px; color: var(--text-light); }

/* ===== CTA ===== */
.cta-box { background: linear-gradient(135deg, var(--primary-dark), var(--primary-light)); border-radius: var(--radius-lg); padding: 56px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') no-repeat center/cover; opacity: 0.1; }
.cta-box h2 { font-size: 30px; font-weight: 800; color: #fff; margin-bottom: 16px; position: relative; z-index: 2; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 520px; margin: 0 auto 28px; position: relative; z-index: 2; }
.cta-box .btn { position: relative; z-index: 2; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item { background: var(--bg-white); border-radius: var(--radius-md); border: 1px solid var(--border); margin-bottom: 14px; overflow: hidden; }
.faq-question { padding: 20px 24px; font-size: 16px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; cursor: pointer; transition: var(--transition); }
.faq-question:hover { color: var(--primary); }
.faq-question i { color: var(--primary); transition: transform 0.3s; }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer p { padding-bottom: 20px; font-size: 14px; color: var(--text-light); line-height: 1.8; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-item.active .faq-answer { max-height: 400px; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.7); padding: 48px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 32px; }
.footer-brand .footer-logo { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-brand .footer-logo i { color: var(--accent); }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-bottom: 16px; }
.footer-brand .social-links { display: flex; gap: 10px; }
.footer-brand .social-links a { width: 36px; height: 36px; border-radius: 8px; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; font-size: 14px; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-brand .social-links a:hover { background: var(--accent); color: var(--primary-dark); }
.footer-title { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-links-main a { display: block; padding: 6px 0; font-size: 14px; transition: var(--transition); }
.footer-links-main a:hover { color: var(--accent); padding-left: 6px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.45); }

/* ===== Inline Banner ===== */
.inline-banner { border-radius: var(--radius-lg); overflow: hidden; position: relative; min-height: 220px; display: flex; align-items: center; padding: 48px; margin: 40px 0; }
.inline-banner img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.inline-banner::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(15,52,96,0.9) 0%, rgba(15,52,96,0.5) 100%); }
.inline-banner .banner-content { position: relative; z-index: 2; color: #fff; max-width: 520px; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .sidebar { width: 200px; }
  .main-area { margin-left: 200px; }
  .hero h1 { font-size: 32px; }
  .hero { padding: 60px 0 48px; }
  .hero-visual { width: 300px; height: 300px; right: 20px; }
  .cards-grid, .cat-cards { grid-template-columns: repeat(2, 1fr); }
  .stats-banner { grid-template-columns: repeat(2, 1fr); padding: 32px; }
  .process-wrap { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .post-list { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main-area { margin-left: 0; }
  .mobile-header { display: flex; }
  .hero { padding: 48px 0; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 16px; }
  .hero-visual { display: none; }
  .cards-grid, .cat-cards { grid-template-columns: 1fr; }
  .feature-split { grid-template-columns: 1fr; }
  .feature-visual img { height: 240px; }
  .stats-banner { grid-template-columns: 2fr; padding: 24px; }
  .process-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-box { padding: 32px 24px; }
  .cta-box h2 { font-size: 24px; }
  .section { padding: 44px 0; }
  .section-header h2 { font-size: 24px; }
  .post-card { flex-direction: column; }
  .post-card .post-thumb { width: 100%; height: 160px; }
}

/* ===== FAQ active ===== */
.faq-item.active { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }

/* ===== Misc ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-3 { margin-bottom: 24px; }
.page-main .container { padding-top: 48px; padding-bottom: 48px; }

/* ===== Article Page ===== */
.article-hero { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 48px 0 32px; color: #fff; }
.article-hero .container { position: relative; z-index: 2; }
.article-hero .post-cat { font-size: 13px; font-weight: 600; background: rgba(232,168,56,0.2); color: var(--accent); padding: 4px 14px; border-radius: 20px; display: inline-block; margin-bottom: 16px; }
.article-hero h1 { font-size: 32px; font-weight: 800; line-height: 1.4; margin-bottom: 14px; }
.article-hero .post-date { font-size: 14px; color: rgba(255,255,255,0.7); display: flex; align-items: center; gap: 8px; }
.article-body { background: var(--bg-white); border-radius: var(--radius-lg); padding: 48px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); line-height: 2; font-size: 16px; }
.article-body h2 { font-size: 24px; margin-top: 32px; margin-bottom: 16px; }
.article-body h3 { font-size: 19px; margin-top: 24px; margin-bottom: 12px; }
.article-body p { margin-bottom: 16px; color: var(--text); }
.article-body ul { padding-left: 20px; margin-bottom: 16px; }
.article-body ul li { margin-bottom: 8px; }
.article-not-found { text-align: center; padding: 80px 24px; }
.article-not-found h2 { font-size: 28px; margin-bottom: 16px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; }

/* ===== Category Page ===== */
.cat-hero { background: linear-gradient(135deg, var(--primary-dark), var(--primary-light)); padding: 48px 0; color: #fff; position: relative; overflow: hidden; }
.cat-hero::before { content: ""; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') no-repeat center/cover; opacity: 0.1; }
.cat-hero .container { position: relative; z-index: 2; }
.cat-hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 10px; }
.cat-hero p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 600px; }

/* back to top */
.back-to-top { position: fixed; bottom: 24px; right: 24px; width: 44px; height: 44px; background: var(--primary); color: #fff; border-radius: 10px; border: none; display: flex; align-items: center; justify-content: center; font-size: 18px; cursor: pointer; z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow-md); }
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1e2c3a;
  --primary-light: #2c3e50;
  --primary-dark: #141e28;
  --accent: #d4a855;
  --accent-hover: #c09a45;
  --accent-light: #f0e0c0;
  --bg: #f6f7f9;
  --bg-alt: #ffffff;
  --bg-dark: #1a2430;
  --text: #24303b;
  --text-weak: #6b7a88;
  --text-light: #ffffff;
  --border: #e2e6ea;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(30, 44, 58, 0.06);
  --shadow-md: 0 6px 24px rgba(30, 44, 58, 0.08);
  --shadow-lg: 0 12px 40px rgba(30, 44, 58, 0.12);
  --transition: all 0.3s ease;
  --space-section: 72px;
  --sidebar-w: 260px;
}

/* ========== Reset ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}
ul, ol {
  list-style: none;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
.section {
  padding: var(--space-section) 0;
}
.section-header {
  margin-bottom: 40px;
}
.section-header .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--primary-dark);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.3px;
  margin-bottom: 14px;
}
.section-header h2 {
  font-size: 32px;
  line-height: 1.3;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: -0.5px;
}
.section-header p {
  color: var(--text-weak);
  font-size: 15px;
  margin-top: 10px;
  max-width: 640px;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
  justify-content: center;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(212, 168, 85, 0.4);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 168, 85, 0.45);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(212, 168, 85, 0.35);
}
.btn-outline {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn-outline:hover {
  background: var(--accent-light);
  color: var(--primary-dark);
}
.btn-light {
  background: #ffffff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

/* ========== 侧边栏导航 ========== */
.app-wrap {
  display: flex;
  min-height: 100vh;
}
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
}
.sidebar-brand {
  padding: 28px 22px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.sidebar-brand a {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.3px;
  line-height: 1.4;
}
.sidebar-brand i {
  font-size: 26px;
  color: var(--accent);
}
.sidebar-nav {
  padding: 18px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}
.sidebar-nav a i {
  font-size: 17px;
  width: 22px;
  text-align: center;
}
.sidebar-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  transform: translateX(3px);
}
.sidebar-nav a.active {
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(212, 168, 85, 0.35);
}
.sidebar-nav a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.sidebar-foot {
  padding: 18px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}
.sidebar-foot span {
  display: block;
  margin-top: 4px;
  font-family: "Courier New", monospace;
}
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
}
.mobile-topbar {
  display: none;
  background: var(--primary);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 99;
  align-items: center;
  justify-content: space-between;
}
.mobile-topbar .m-logo {
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mobile-topbar .m-logo i {
  color: var(--accent);
  font-size: 20px;
}
.menu-toggle {
  color: #fff;
  font-size: 22px;
  padding: 6px 10px;
  cursor: pointer;
  border-radius: 8px;
  transition: var(--transition);
}
.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}
.mobile-nav {
  display: none;
  background: var(--primary);
  padding: 10px 16px 16px;
  position: sticky;
  top: 54px;
  z-index: 98;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}
.mobile-nav.open {
  display: block;
}
.mobile-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.85);
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
}
.mobile-nav a i {
  width: 20px;
  text-align: center;
}
.mobile-nav a:hover {
  background: rgba(255, 255, 255, 0.08);
}
.mobile-nav a.active {
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 600;
}

/* ========== Hero ========== */
.cat-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, #2a3a4d 100%);
  padding: 72px 48px 64px;
  position: relative;
  overflow: hidden;
  min-height: 340px;
  display: flex;
  align-items: center;
}
.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}
.cat-hero::after {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 168, 85, 0.25) 0%, transparent 70%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.hero-inner .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  margin-bottom: 18px;
}
.hero-inner .breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}
.hero-inner .breadcrumb a:hover {
  color: var(--accent);
}
.hero-inner .breadcrumb i {
  font-size: 10px;
}
.hero-inner h1 {
  color: #fff;
  font-size: 40px;
  line-height: 1.3;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.hero-inner h1 i {
  color: var(--accent);
}
.hero-inner p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-tags .tag {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  backdrop-filter: blur(4px);
}

/* ========== 快速引导 ========== */
.quick-guide {
  margin-top: -46px;
  padding: 0 32px;
  position: relative;
  z-index: 5;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.quick-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 32px 28px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: var(--transition);
}
.quick-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 44px rgba(30, 44, 58, 0.14);
}
.quick-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.quick-card h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 6px;
  font-weight: 600;
}
.quick-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}
.quick-card .num {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent-hover);
}

/* ========== 下载方式 ========== */
.download-section {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 56px 48px;
  box-shadow: var(--shadow-md);
}
.download-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.download-tab {
  padding: 10px 24px;
  border-radius: 30px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.download-tab:hover {
  background: var(--accent-light);
  color: var(--primary-dark);
}
.download-tab.active {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(212, 168, 85, 0.3);
}
.download-item {
  display: none;
  gap: 40px;
  align-items: center;
}
.download-item.active {
  display: flex;
}
.download-info {
  flex: 1;
}
.download-info h3 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 12px;
}
.download-info p {
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 14px;
}
.download-info ul {
  margin: 14px 0 18px;
}
.download-info ul li {
  padding-left: 24px;
  position: relative;
  margin-bottom: 8px;
  color: var(--text);
  font-size: 14px;
}
.download-info ul li::before {
  content: '\f00c';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  color: var(--accent-hover);
  font-size: 13px;
}
.download-img {
  flex: 0 0 280px;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.download-img img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition);
}
.download-img:hover img {
  transform: scale(1.03);
}

/* ========== 系统要求 ========== */
.req-section {
  background: var(--bg);
}
.req-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.req-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 36px 32px;
  position: relative;
  display: flex;
  gap: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.req-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.req-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.req-card h3 {
  font-size: 16px;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 600;
}
.req-card ul li {
  font-size: 14px;
  color: var(--text-weak);
  padding: 5px 0;
  border-bottom: 1px dashed var(--border);
}
.req-card ul li:last-child {
  border-bottom: none;
}
.req-card ul li strong {
  color: var(--text);
  font-weight: 600;
}

/* ========== 安装流程 ========== */
.steps-section {
  background: var(--bg-alt);
}
.steps-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  counter-reset: step;
}
.step-item {
  position: relative;
  padding: 36px 24px 28px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
  text-align: center;
}
.step-item::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  top: -18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(212, 168, 85, 0.3);
}
.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.step-item i {
  font-size: 28px;
  color: var(--accent-hover);
  margin: 10px 0 14px;
}
.step-item h4 {
  font-size: 15px;
  color: var(--primary);
  margin-bottom: 8px;
  font-weight: 600;
}
.step-item p {
  font-size: 13px;
  color: var(--text-weak);
  line-height: 1.6;
}

/* ========== 平台差异 ========== */
.platform-section {
  background: var(--bg);
}
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.platform-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.platform-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.platform-banner {
  height: 200px;
  position: relative;
  overflow: hidden;
}
.platform-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.platform-banner .badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 20px;
  letter-spacing: 0.5px;
}
.platform-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.platform-body h3 {
  font-size: 19px;
  color: var(--primary);
  margin-bottom: 10px;
}
.platform-body p {
  font-size: 14px;
  color: var(--text-weak);
  flex: 1;
}
.platform-body .steps-mini {
  margin-top: 16px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.platform-body .steps-mini li {
  padding: 6px 0;
  font-size: 14px;
  color: var(--text);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.platform-body .steps-mini li i {
  color: var(--accent-hover);
  font-size: 13px;
  margin-top: 5px;
  width: 16px;
}
.platform-btn {
  margin-top: 20px;
  align-self: flex-start;
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg-alt);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  background: var(--bg-alt);
  transition: var(--transition);
}
.faq-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  padding: 18px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  list-style: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 13px;
  color: var(--accent-hover);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-item .answer {
  padding: 0 24px 20px;
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item .answer strong {
  color: var(--text);
}

/* ========== CTA ========== */
.cta-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
  padding: 72px 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-inner h2 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 14px;
  font-weight: 700;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 16px;
  margin-bottom: 28px;
  line-height: 1.7;
}
.cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-note {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 26px;
  margin-left: var(--sidebar-w);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-logo {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-logo i {
  color: var(--accent);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}
.social-links {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}
.social-links a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.social-links a:hover {
  background: var(--accent);
  color: var(--primary-dark);
  transform: translateY(-3px);
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links-main {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links-main a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  transition: var(--transition);
}
.footer-links-main a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-links-main span {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  :root {
    --sidebar-w: 220px;
  }
  .hero-inner h1 {
    font-size: 34px;
  }
  .quick-grid {
    gap: 16px;
  }
  .quick-card {
    padding: 24px 18px;
    flex-direction: column;
    gap: 12px;
  }
  .steps-wrap {
    grid-template-columns: repeat(2, 1fr);
  }
  .download-item {
    flex-direction: column;
  }
  .download-img {
    flex: 0 0 auto;
    width: 100%;
  }
  .download-img img {
    height: 180px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  .mobile-topbar {
    display: flex;
  }
  .main-content {
    margin-left: 0;
  }
  .site-footer {
    margin-left: 0;
  }
  .cat-hero {
    padding: 48px 24px;
    min-height: auto;
  }
  .hero-inner h1 {
    font-size: 28px;
  }
  .hero-inner p {
    font-size: 15px;
  }
  .quick-guide {
    margin-top: -24px;
    padding: 0 16px;
  }
  .quick-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .quick-card {
    padding: 20px;
    flex-direction: row;
    align-items: center;
  }
  .container {
    padding: 0 20px;
  }
  .download-section {
    padding: 36px 24px;
  }
  .req-grid {
    grid-template-columns: 1fr;
  }
  .platform-grid {
    grid-template-columns: 1fr;
  }
  .steps-wrap {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .cat-hero::after {
    width: 200px;
    height: 200px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .cat-hero {
    padding: 40px 20px;
  }
  .hero-inner h1 {
    font-size: 24px;
  }
  .hero-inner p {
    font-size: 14px;
  }
  .hero-tags .tag {
    font-size: 12px;
    padding: 5px 10px;
  }
  .download-tabs {
    gap: 8px;
  }
  .download-tab {
    padding: 8px 16px;
    font-size: 13px;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .step-item {
    padding: 30px 18px 22px;
  }
  .cta-inner h2 {
    font-size: 22px;
  }
  .cta-btns .btn {
    padding: 10px 22px;
    font-size: 14px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
  .platform-body {
    padding: 20px;
  }
}

/* ========== 辅助 ========== */
.text-accent {
  color: var(--accent-hover);
}
.fade-in {
  animation: fadeIn 0.6s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #1B2A4A;
  --primary-light: #243B66;
  --primary-dark: #121F38;
  --accent: #C9A96E;
  --accent-hover: #B8954F;
  --accent-soft: #F5EFE3;
  --bg: #F4F6FA;
  --surface: #FFFFFF;
  --text: #1A2332;
  --text-weak: #6B7A8F;
  --border: #E3E8EF;
  --success: #2DA06C;
  --danger: #D9534F;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(27,42,74,.06), 0 4px 14px rgba(27,42,74,.04);
  --shadow-md: 0 4px 20px rgba(27,42,74,.08);
  --shadow-lg: 0 12px 40px rgba(27,42,74,.12);
  --sidebar-width: 260px;
  --space-sm: 12px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 72px;
  --font-main: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border-radius:var(--radius-md)}
a{color:inherit;text-decoration:none;transition:color .25s,background .25s,box-shadow .25s,transform .25s,border-color .25s}
a:hover,a:focus{outline:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
input,textarea{font-family:inherit}
ul,ol{list-style-position:inside}
h1,h2,h3,h4,h5,h6{line-height:1.35;font-weight:700;color:var(--text)}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
#mainContent{scroll-margin-top:20px}

/* ===== 按钮 ===== */
.btn-primary,.btn-accent,.btn-outline,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:50px;font-weight:600;font-size:15px;line-height:1.4;transition:all .3s ease;letter-spacing:.3px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(27,42,74,.24)}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(27,42,74,.3);color:#fff}
.btn-accent{background:var(--accent);color:#1B2A4A;box-shadow:0 4px 14px rgba(201,169,110,.3)}
.btn-accent:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(201,169,110,.4);color:#121F38}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-ghost{color:var(--text-weak);padding:10px 20px}
.btn-ghost:hover{background:var(--accent-soft);color:var(--primary)}

/* ===== 标签 ===== */
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:var(--accent-soft);color:var(--primary);border-radius:30px;font-size:13px;font-weight:600;transition:all .3s}
.tag:hover{background:var(--accent);color:#fff}
.tag i{font-size:12px}
.section-tag{display:inline-block;padding:6px 16px;background:var(--accent-soft);color:var(--accent-hover);border-radius:30px;font-size:13px;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:14px}
.meta-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);color:#fff;border-radius:30px;font-size:13px;font-weight:500;backdrop-filter:blur(6px)}

/* ===== 移动端顶部栏 ===== */
.mobile-topbar{display:none;position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--primary);padding:12px 20px;align-items:center;justify-content:space-between;box-shadow:0 2px 12px rgba(27,42,74,.2)}
.mobile-topbar .menu-toggle{color:#fff;font-size:20px;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:8px;background:rgba(255,255,255,.1)}
.mobile-topbar .menu-toggle:hover{background:rgba(255,255,255,.2)}
.mobile-logo{color:#fff;font-weight:700;font-size:16px;display:flex;align-items:center;gap:8px}
.mobile-logo i{color:var(--accent)}

/* ===== 遮罩 ===== */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(18,31,56,.5);z-index:990;opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.sidebar-overlay.active{opacity:1;visibility:visible}

/* ===== 侧边栏 ===== */
.sidebar{position:fixed;top:0;left:0;bottom:0;width:var(--sidebar-width);background:var(--primary);color:#fff;z-index:1001;display:flex;flex-direction:column;padding:28px 18px;transition:transform .35s cubic-bezier(.4,0,.2,1);overflow-y:auto}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:8px 12px 26px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:22px}
.brand-icon{width:44px;height:44px;background:var(--accent);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:20px;color:var(--primary);flex-shrink:0}
.brand-text{display:flex;flex-direction:column;line-height:1.3}
.brand-main{font-size:15px;font-weight:700;letter-spacing:.5px}
.brand-sub{font-size:12px;color:rgba(255,255,255,.6)}
.sidebar-nav{display:flex;flex-direction:column;gap:4px;flex:1}
.sidebar-nav a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:12px;color:rgba(255,255,255,.75);font-weight:500;font-size:14px;transition:all .3s}
.sidebar-nav a i{width:20px;text-align:center;font-size:15px}
.sidebar-nav a:hover{background:rgba(255,255,255,.1);color:#fff;transform:translateX(3px)}
.sidebar-nav a.active{background:var(--accent);color:var(--primary);font-weight:700;box-shadow:0 4px 16px rgba(201,169,110,.3)}
.sidebar-nav a.active i{color:var(--primary)}
.sidebar-info{margin-top:20px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-direction:column;gap:8px}
.info-card{display:flex;align-items:center;gap:10px;padding:10px 12px;background:rgba(255,255,255,.06);border-radius:10px;font-size:13px;color:rgba(255,255,255,.8)}
.info-card i{color:var(--accent);font-size:14px;width:18px;text-align:center}

/* ===== 主内容区 ===== */
.main-wrapper{margin-left:var(--sidebar-width);min-height:100vh;display:flex;flex-direction:column}

/* ===== 文章Banner ===== */
.article-banner{position:relative;background-size:cover;background-position:center;padding:90px 0 70px;color:#fff;margin-bottom:0}
.article-banner::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(18,31,56,.9) 0%,rgba(27,42,74,.75) 60%,rgba(201,169,110,.35) 100%);border-radius:0}
.article-banner .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:22px}
.breadcrumb a{color:rgba(255,255,255,.75);transition:color .3s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb i{font-size:12px}
.article-banner h1{font-size:38px;font-weight:800;line-height:1.3;max-width:820px;margin-bottom:20px;letter-spacing:.5px;text-shadow:0 2px 20px rgba(0,0,0,.2)}
.article-meta{display:flex;flex-wrap:wrap;gap:10px}

/* ===== 文章正文 ===== */
.article-main{padding:50px 0 20px}
.article-card{background:var(--surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:48px 56px;margin-bottom:40px;border:1px solid rgba(255,255,255,.2)}
.article-body{font-size:16px;line-height:1.9;color:var(--text)}
.article-body h2{font-size:26px;margin:42px 0 18px;padding-bottom:12px;border-bottom:3px solid var(--accent-soft);color:var(--primary)}
.article-body h3{font-size:20px;margin:32px 0 14px;padding-left:14px;border-left:4px solid var(--accent);color:var(--primary)}
.article-body p{margin-bottom:20px}
.article-body img{border-radius:var(--radius-md);margin:24px 0;box-shadow:var(--shadow-md)}
.article-body ul,.article-body ol{margin:16px 0 24px;padding-left:24px}
.article-body ul li,.article-body ol li{margin-bottom:10px;position:relative}
.article-body ul li::before{content:'\f058';font-family:'Font Awesome 6 Free';font-weight:900;font-size:13px;color:var(--accent);position:absolute;left:-20px;top:2px}
.article-body ol li{padding-left:6px}
.article-body blockquote{border-left:4px solid var(--accent);background:var(--accent-soft);padding:20px 24px;border-radius:0 var(--radius-md) var(--radius-md) 0;margin:24px 0;font-style:italic;color:var(--primary)}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--accent-hover);font-weight:600;border-bottom:1px solid transparent}
.article-body a:hover{border-bottom-color:var(--accent-hover)}
.article-body code{background:var(--accent-soft);padding:2px 8px;border-radius:4px;font-size:14px;color:var(--primary)}
.article-body pre{background:var(--primary);color:#E8EDF4;padding:20px;border-radius:var(--radius-md);overflow-x:auto;margin:20px 0}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-body table th{background:var(--primary);color:#fff;padding:12px;text-align:left;font-weight:600}
.article-body table td{padding:12px;border-bottom:1px solid var(--border)}
.article-body table tr:nth-child(even){background:var(--bg)}
.article-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;padding-top:28px;border-top:1px solid var(--border)}

/* ===== 未找到 ===== */
.not-found{text-align:center;padding:60px 20px}
.not-found-icon{width:88px;height:88px;background:var(--accent-soft);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:36px;color:var(--accent);margin:0 auto 24px}
.not-found h2{font-size:28px;margin-bottom:12px;color:var(--primary)}
.not-found p{color:var(--text-weak);margin-bottom:28px;max-width:420px;margin-left:auto;margin-right:auto}
.not-found .btn-primary{padding:14px 36px}

/* ===== 文章底部导航 ===== */
.post-navigation{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding:20px 0 40px}
.post-nav-link{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;background:var(--surface);border:1px solid var(--border);border-radius:50px;font-size:14px;font-weight:600;color:var(--primary);box-shadow:var(--shadow-sm);transition:all .3s}
.post-nav-link:hover{border-color:var(--accent);color:var(--accent-hover);transform:translateY(-2px);box-shadow:var(--shadow-md)}

/* ===== 相关推荐 ===== */
.related-section{padding:60px 0 70px;background:var(--surface)}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head h2{font-size:30px;color:var(--primary);margin-bottom:12px;letter-spacing:.5px}
.section-head p{color:var(--text-weak);font-size:15px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.related-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .4s ease;display:block}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.related-image{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--primary-light)}
.related-image img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.related-card:hover .related-image img{transform:scale(1.06)}
.related-badge{position:absolute;top:14px;left:14px;background:var(--accent);color:var(--primary);font-size:12px;font-weight:700;padding:5px 14px;border-radius:30px;letter-spacing:1px;box-shadow:0 4px 12px rgba(0,0,0,.15)}
.related-content{padding:24px}
.related-content h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:10px;line-height:1.5;transition:color .3s}
.related-card:hover .related-content h3{color:var(--accent-hover)}
.related-content p{font-size:14px;color:var(--text-weak);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--accent-hover);margin-top:14px}
.related-link i{transition:transform .3s}
.related-card:hover .related-link i{transform:translateX(4px)}

/* ===== FAQ ===== */
.faq-section{padding:70px 0;background:var(--bg)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:960px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:26px 28px;box-shadow:var(--shadow-sm);transition:all .3s}
.faq-item:hover{box-shadow:var(--shadow-md);border-color:var(--accent-soft);transform:translateY(-2px)}
.faq-item h3{display:flex;align-items:flex-start;gap:12px;font-size:16px;font-weight:700;color:var(--primary);margin-bottom:12px}
.faq-item h3 i{color:var(--accent);font-size:18px;margin-top:2px}
.faq-item p{font-size:14px;color:var(--text-weak);line-height:1.8;padding-left:30px}

/* ===== CTA ===== */
.cta-section{position:relative;padding:80px 0;background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,var(--primary-light) 100%);overflow:hidden;text-align:center;color:#fff}
.cta-section::before{content:'';position:absolute;top:-60%;right:-30%;width:600px;height:600px;background:radial-gradient(circle,rgba(201,169,110,.25) 0%,transparent 65%);border-radius:50%}
.cta-section::after{content:'';position:absolute;bottom:-80%;left:-20%;width:500px;height:500px;background:radial-gradient(circle,rgba(255,255,255,.08) 0%,transparent 60%);border-radius:50%}
.cta-content{position:relative;z-index:2;max-width:640px;margin:0 auto}
.cta-content h2{font-size:34px;font-weight:800;margin-bottom:16px;letter-spacing:.5px;color:#fff}
.cta-content p{font-size:16px;color:rgba(255,255,255,.75);margin-bottom:36px;line-height:1.8}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.cta-buttons .btn-primary{background:var(--accent);color:var(--primary);box-shadow:0 6px 24px rgba(201,169,110,.4)}
.cta-buttons .btn-primary:hover{background:#fff;color:var(--primary);transform:translateY(-2px)}
.cta-buttons .btn-outline{border-color:rgba(255,255,255,.6);color:#fff}
.cta-buttons .btn-outline:hover{background:#fff;color:var(--primary);border-color:#fff}

/* ===== 页脚 ===== */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.7);padding:60px 0 0;margin-top:auto}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-brand .footer-logo{font-size:18px;font-weight:700;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .footer-logo i{color:var(--accent);font-size:22px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:320px;margin-bottom:20px;color:rgba(255,255,255,.6)}
.social-links{display:flex;gap:12px}
.social-links a{width:38px;height:38px;background:rgba(255,255,255,.08);border-radius:50%;display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.75);font-size:15px;transition:all .3s}
.social-links a:hover{background:var(--accent);color:var(--primary);transform:translateY(-3px)}
.footer-title{font-size:15px;font-weight:700;color:#fff;margin-bottom:20px;position:relative;padding-bottom:10px}
.footer-title::after{content:'';position:absolute;left:0;bottom:0;width:28px;height:2px;background:var(--accent);border-radius:2px}
.footer-links-main{display:flex;flex-direction:column;gap:10px}
.footer-links-main a{font-size:14px;color:rgba(255,255,255,.6);transition:all .3s;display:inline-flex;align-items:center;gap:6px}
.footer-links-main a::before{content:'›';color:var(--accent);font-size:14px}
.footer-links-main a:hover{color:#fff;padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .sidebar{transform:translateX(-100%);width:280px;box-shadow:4px 0 30px rgba(0,0,0,.15)}
  .sidebar.open{transform:translateX(0)}
  .mobile-topbar{display:flex}
  .sidebar-overlay{display:block}
  .main-wrapper{margin-left:0}
  .article-banner{padding:110px 0 60px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .article-banner h1{font-size:28px}
  .article-main{padding:30px 0 20px}
  .article-card{padding:28px 24px}
  .section-head h2{font-size:24px}
  .faq-grid{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .cta-content h2{font-size:26px}
  .post-navigation{flex-direction:column;align-items:stretch}
  .post-nav-link{justify-content:center}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .article-banner{padding:100px 0 44px}
  .article-banner h1{font-size:24px;line-height:1.4}
  .article-card{padding:20px 18px}
  .article-body{font-size:15px}
  .article-body h2{font-size:21px}
  .article-body h3{font-size:18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .cta-buttons{flex-direction:column;align-items:stretch}
  .cta-buttons .btn-primary,.cta-buttons .btn-outline{width:100%}
  .related-content h3{font-size:16px}
  .faq-item{padding:20px 18px}
  .article-tags .tag{font-size:12px}
}