/* roulang page: index */
/* ===== Design Variables ===== */
:root {
  --color-primary: #FF6B35;
  --color-primary-dark: #E55A2B;
  --color-primary-light: #FF8C5A;
  --color-secondary: #FFD166;
  --color-secondary-dark: #F0C050;
  --color-accent: #06D6A0;
  --color-dark: #1A1A2E;
  --color-dark-soft: #2D2D44;
  --color-dark-muted: #3D3D5C;
  --color-bg: #F8F9FA;
  --color-bg-alt: #FFFFFF;
  --color-bg-dark: #1A1A2E;
  --color-text: #2D3436;
  --color-text-light: #636E72;
  --color-text-lighter: #B2BEC3;
  --color-text-inverse: #FFFFFF;
  --color-border: #E9ECEF;
  --color-border-light: #F1F3F5;
  --color-success: #06D6A0;
  --color-warning: #FFD166;
  --color-error: #EF476F;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.16);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --container-max: 1200px;
  --container-narrow: 960px;
  --nav-height: 72px;
  --space-section: 80px;
  --space-block: 48px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
a:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
button:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 2px; border-radius: 6px; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--color-dark); font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }
p { margin-bottom: 1rem; color: var(--color-text-light); }
::selection { background: var(--color-primary); color: #fff; }

/* ===== Container ===== */
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--container-narrow); }

/* ===== Utility ===== */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.text-center { text-align: center; }
.text-primary { color: var(--color-primary); }
.bg-dark { background: var(--color-bg-dark); color: var(--color-text-inverse); }
.bg-dark h2, .bg-dark h3, .bg-dark h4 { color: #fff; }
.bg-dark p { color: rgba(255,255,255,0.75); }
.bg-alt { background: var(--color-bg-alt); }
.section { padding: var(--space-section) 0; }
.section-title { margin-bottom: 0.5rem; text-align: center; }
.section-subtitle { text-align: center; font-size: 1.1rem; color: var(--color-text-light); max-width: 640px; margin: 0 auto var(--space-block); }
.section-subtitle:after { content: ''; display: block; width: 60px; height: 4px; background: var(--color-primary); border-radius: 4px; margin: 16px auto 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 50px;
  font-weight: 600; font-size: 0.95rem; letter-spacing: 0.01em; transition: all var(--transition);
  border: 2px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-primary:hover { background: var(--color-primary-dark); border-color: var(--color-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,53,0.35); }
.btn-outline { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,53,0.25); }
.btn-light { background: #fff; color: var(--color-primary); border-color: #fff; }
.btn-light:hover { background: var(--color-bg); color: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.btn-dark { background: var(--color-dark); color: #fff; border-color: var(--color-dark); }
.btn-dark:hover { background: var(--color-dark-soft); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn i { font-size: 1.1em; }

/* ===== Badge / Tag ===== */
.badge {
  display: inline-block; padding: 4px 14px; border-radius: 50px; font-size: 0.78rem; font-weight: 600;
  background: var(--color-primary); color: #fff; letter-spacing: 0.02em;
}
.badge-secondary { background: var(--color-secondary); color: var(--color-dark); }
.badge-accent { background: var(--color-accent); color: #fff; }
.badge-outline { background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary); }
.badge-sm { padding: 2px 10px; font-size: 0.7rem; }

/* ===== Card ===== */
.card {
  background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
  transition: all var(--transition); overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.card-body { padding: 24px; }
.card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--color-dark); }
.card-text { font-size: 0.92rem; color: var(--color-text-light); line-height: 1.6; margin-bottom: 16px; }
.card-footer { padding: 16px 24px; border-top: 1px solid var(--color-border); display: flex; align-items: center; gap: 12px; background: var(--color-bg-alt); }

/* ===== Grid ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }

/* ===== Navigation ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0,0,0,0.06); height: var(--nav-height); transition: all var(--transition);
}
.site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; font-weight: 800; color: var(--color-dark); letter-spacing: -0.02em; }
.nav-logo:hover { color: var(--color-primary); }
.nav-logo i { color: var(--color-primary); font-size: 1.6rem; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  display: flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 50px;
  font-weight: 500; font-size: 0.92rem; color: var(--color-text); transition: all var(--transition);
  position: relative;
}
.nav-links a:hover { background: var(--color-bg); color: var(--color-primary); }
.nav-links a.active { background: var(--color-primary); color: #fff; }
.nav-links a i { font-size: 0.9rem; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; gap: 8px; background: var(--color-bg); border-radius: 50px; padding: 6px 16px; border: 1px solid var(--color-border); transition: all var(--transition); }
.nav-search:focus-within { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(255,107,53,0.12); }
.nav-search input { border: none; background: transparent; padding: 6px 0; font-size: 0.88rem; color: var(--color-text); width: 140px; outline: none; }
.nav-search input::placeholder { color: var(--color-text-lighter); }
.nav-search i { color: var(--color-text-lighter); font-size: 0.95rem; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--color-dark); padding: 8px; cursor: pointer; }

/* ===== Mega Dropdown ===== */
.mega-dropdown { position: relative; }
.mega-dropdown-menu {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translateX(-50%) translateY(8px);
  background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-lg);
  padding: 24px; min-width: 420px; opacity: 0; visibility: hidden; transition: all var(--transition);
  border: 1px solid var(--color-border); pointer-events: none;
}
.mega-dropdown:hover .mega-dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); pointer-events: auto; }
.mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.mega-item { display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-radius: var(--radius-sm); transition: background var(--transition); }
.mega-item:hover { background: var(--color-bg); }
.mega-item-icon { width: 40px; height: 40px; background: var(--color-primary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.1rem; flex-shrink: 0; }
.mega-item-icon.alt { background: var(--color-secondary); color: var(--color-dark); }
.mega-item-text strong { display: block; font-size: 0.92rem; color: var(--color-dark); }
.mega-item-text span { font-size: 0.8rem; color: var(--color-text-light); }

/* ===== Hero ===== */
.hero {
  min-height: 85vh; display: flex; align-items: center; position: relative;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-soft) 60%, var(--color-dark-muted) 100%);
  overflow: hidden; margin-top: var(--nav-height);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.25; mix-blend-mode: overlay;
}
.hero-overlay { position: absolute; inset: 0; z-index: 1; background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(26,26,46,0.60) 100%); }
.hero-content { position: relative; z-index: 2; max-width: 720px; padding: 60px 0; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.12); padding: 6px 20px 6px 12px; border-radius: 50px; color: #fff; font-size: 0.85rem; margin-bottom: 24px; backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.15); }
.hero-badge i { color: var(--color-secondary); }
.hero h1 { color: #fff; font-size: clamp(2.4rem, 6vw, 4rem); letter-spacing: -0.02em; line-height: 1.1; margin-bottom: 20px; }
.hero h1 span { color: var(--color-primary); }
.hero p { color: rgba(255,255,255,0.7); font-size: 1.15rem; max-width: 560px; margin-bottom: 32px; line-height: 1.7; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.12); }
.hero-stat strong { display: block; font-size: 1.8rem; color: #fff; font-weight: 800; }
.hero-stat span { font-size: 0.85rem; color: rgba(255,255,255,0.55); }

/* ===== Feature / 核心理念 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.feature-card {
  background: #fff; border-radius: var(--radius-md); padding: 36px 28px; text-align: center;
  box-shadow: var(--shadow-sm); transition: all var(--transition); border: 1px solid var(--color-border-light);
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); border-color: var(--color-primary-light); }
.feature-icon {
  width: 68px; height: 68px; margin: 0 auto 20px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; font-size: 1.8rem;
}
.feature-icon.primary { background: rgba(255,107,53,0.12); color: var(--color-primary); }
.feature-icon.secondary { background: rgba(255,209,102,0.2); color: #D4A843; }
.feature-icon.accent { background: rgba(6,214,160,0.12); color: var(--color-accent); }
.feature-card h3 { margin-bottom: 10px; }
.feature-card p { font-size: 0.92rem; margin-bottom: 0; }

/* ===== Category / 分类入口 ===== */
.category-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.category-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden; aspect-ratio: 16/9;
  display: flex; align-items: flex-end; cursor: pointer; transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.category-card:hover { box-shadow: var(--shadow-lg); transform: scale(1.01); }
.category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.category-card:hover img { transform: scale(1.05); }
.category-card-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.1) 60%, rgba(0,0,0,0) 100%); }
.category-card-body { position: relative; z-index: 1; padding: 32px 28px; width: 100%; }
.category-card-body h3 { color: #fff; font-size: 1.4rem; margin-bottom: 4px; }
.category-card-body p { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin-bottom: 12px; }
.category-card-body .btn { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.25); backdrop-filter: blur(4px); }
.category-card-body .btn:hover { background: var(--color-primary); border-color: var(--color-primary); }

/* ===== Latest Posts / CMS 列表 ===== */
.post-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.post-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: all var(--transition); }
.post-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.post-card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.post-card-body { padding: 20px 22px 22px; }
.post-card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--color-text-lighter); margin-bottom: 8px; }
.post-card-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
.post-card-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
.post-card-body h3 a { color: var(--color-dark); }
.post-card-body h3 a:hover { color: var(--color-primary); }
.post-card-body p { font-size: 0.88rem; color: var(--color-text-light); margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-card-footer { padding: 12px 22px; border-top: 1px solid var(--color-border); display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem; color: var(--color-text-lighter); }
.post-card-footer i { margin-right: 4px; }
.post-empty { text-align: center; padding: 60px 20px; color: var(--color-text-light); grid-column: 1 / -1; }
.post-empty i { font-size: 2.4rem; color: var(--color-text-lighter); margin-bottom: 16px; display: block; }

/* ===== Stats / 数据统计 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.stat-card { background: rgba(255,255,255,0.06); border-radius: var(--radius-md); padding: 32px 20px; text-align: center; border: 1px solid rgba(255,255,255,0.08); backdrop-filter: blur(8px); }
.stat-card i { font-size: 2rem; color: var(--color-secondary); margin-bottom: 12px; }
.stat-card strong { display: block; font-size: 2.2rem; color: #fff; font-weight: 800; }
.stat-card span { font-size: 0.88rem; color: rgba(255,255,255,0.55); }

/* ===== Process / 流程 ===== */
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; position: relative; }
.process-step { text-align: center; position: relative; }
.process-step-num { width: 52px; height: 52px; border-radius: 50%; background: var(--color-primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 800; margin: 0 auto 16px; position: relative; z-index: 1; }
.process-step h4 { margin-bottom: 6px; }
.process-step p { font-size: 0.88rem; margin-bottom: 0; }
.process-line { position: absolute; top: 26px; left: calc(12.5% + 26px); right: calc(12.5% + 26px); height: 2px; background: var(--color-border); z-index: 0; }

/* ===== FAQ ===== */
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); padding: 0; }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 20px 0;
  font-size: 1.05rem; font-weight: 600; color: var(--color-dark); text-align: left; background: none; border: none; cursor: pointer; transition: color var(--transition);
}
.faq-question:hover { color: var(--color-primary); }
.faq-question i { color: var(--color-text-lighter); transition: transform var(--transition); font-size: 0.9rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); color: var(--color-primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0; }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 0 20px; }
.faq-answer p { font-size: 0.95rem; margin-bottom: 0; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 80px 0; text-align: center; position: relative; overflow: hidden;
}
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.08; mix-blend-mode: overlay; }
.cta-section h2 { color: #fff; font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
.cta-section .btn-light:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.2); }

/* ===== Footer ===== */
.site-footer { background: var(--color-dark); color: rgba(255,255,255,0.6); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .nav-logo { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.5); max-width: 300px; }
.footer-social { display: flex; gap: 12px; margin-top: 20px; }
.footer-social a { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); transition: all var(--transition); }
.footer-social a:hover { background: var(--color-primary); color: #fff; }
.footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
.footer-col a { display: block; padding: 4px 0; font-size: 0.88rem; color: rgba(255,255,255,0.5); transition: color var(--transition); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom { padding: 20px 0; text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.35); }
.footer-bottom span { color: rgba(255,255,255,0.5); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .process-line { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  :root { --space-section: 56px; --nav-height: 64px; }
  .nav-links { display: none; position: absolute; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); border-bottom: 1px solid var(--color-border); flex-direction: column; padding: 16px 24px; gap: 4px; box-shadow: var(--shadow-md); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
  .nav-search { display: none; }
  .nav-toggle { display: block; }
  .hero { min-height: 70vh; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .hero-stats .hero-stat { flex: 1 0 40%; }
  .feature-grid { grid-template-columns: 1fr; }
  .category-grid { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .mega-dropdown-menu { display: none; }
  .cta-section { padding: 56px 0; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero { min-height: 60vh; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 0.95rem; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .hero-stat strong { font-size: 1.4rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 20px 12px; }
  .stat-card strong { font-size: 1.6rem; }
  .process-grid { grid-template-columns: 1fr; gap: 20px; }
  .section-title { font-size: 1.5rem; }
  .category-card-body { padding: 20px; }
  .category-card-body h3 { font-size: 1.1rem; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== Smooth toggle for mobile ===== */
@media (max-width: 768px) {
  .mega-dropdown-menu { position: static; transform: none; box-shadow: none; padding: 8px 0 8px 16px; min-width: auto; opacity: 1; visibility: visible; border: none; pointer-events: auto; transition: none; display: none; }
  .mega-dropdown.open .mega-dropdown-menu { display: block; }
  .mega-grid { grid-template-columns: 1fr; gap: 8px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #E84040;
            --primary-light: #FF6B6B;
            --primary-dark: #C03030;
            --secondary: #FF8C42;
            --accent: #F9C74F;
            --bg-body: #F9F9FB;
            --bg-card: #FFFFFF;
            --bg-dark: #1A1A2E;
            --bg-section-alt: #F0F2F8;
            --text-primary: #1E1E2F;
            --text-secondary: #555570;
            --text-light: #8A8AA8;
            --text-white: #FFFFFF;
            --border-color: #E8E8F0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --shadow-xl: 0 30px 80px rgba(0,0,0,0.15);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--text-primary); }
        h1 { font-size: 2.8rem; font-weight: 800; }
        h2 { font-size: 2rem; font-weight: 700; }
        h3 { font-size: 1.4rem; font-weight: 600; }
        h4 { font-size: 1.1rem; font-weight: 600; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: rgba(255,255,255,0.85); backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(232,232,240,0.5);
            height: var(--header-h);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow-sm); }
        .nav-wrap { display: flex; align-items: center; height: var(--header-h); gap: 32px; }
        .nav-logo {
            display: flex; align-items: center; gap: 8px;
            font-size: 1.5rem; font-weight: 800; color: var(--primary);
            letter-spacing: -0.5px; white-space: nowrap;
        }
        .nav-logo i { font-size: 1.4rem; }
        .nav-links { display: flex; align-items: center; gap: 6px; flex: 1; }
        .nav-links > a,
        .mega-dropdown > a {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 8px 16px; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
            transition: all var(--transition); white-space: nowrap;
            position: relative;
        }
        .nav-links > a i,
        .mega-dropdown > a i { font-size: 1rem; }
        .nav-links > a:hover,
        .mega-dropdown > a:hover { color: var(--primary); background: rgba(232,64,64,0.06); }
        .nav-links > a.active,
        .mega-dropdown > a.active { color: var(--primary); background: rgba(232,64,64,0.10); font-weight: 600; }
        .mega-dropdown { position: relative; }
        .mega-dropdown-menu {
            position: absolute; top: calc(100% + 8px); left: 0;
            background: var(--bg-card); border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg); padding: 20px 24px;
            width: 480px; opacity: 0; visibility: hidden;
            transform: translateY(8px); transition: all var(--transition);
            border: 1px solid var(--border-color); z-index: 100;
        }
        .mega-dropdown:hover .mega-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
        .mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
        .mega-item {
            display: flex; align-items: center; gap: 12px;
            padding: 12px 14px; border-radius: var(--radius-sm);
            transition: background var(--transition); background: transparent;
        }
        .mega-item:hover { background: rgba(232,64,64,0.05); color: inherit; }
        .mega-item-icon {
            flex-shrink: 0; width: 42px; height: 42px;
            display: flex; align-items: center; justify-content: center;
            border-radius: var(--radius-sm); background: rgba(232,64,64,0.08);
            color: var(--primary); font-size: 1.2rem;
        }
        .mega-item-icon.alt { background: rgba(255,140,66,0.10); color: var(--secondary); }
        .mega-item-text { display: flex; flex-direction: column; }
        .mega-item-text strong { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
        .mega-item-text span { font-size: 0.8rem; color: var(--text-light); }
        .nav-actions { display: flex; align-items: center; gap: 16px; margin-left: auto; }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--bg-body); border-radius: 40px;
            padding: 6px 16px; border: 1px solid var(--border-color);
            transition: border var(--transition), box-shadow var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(232,64,64,0.12); }
        .nav-search i { color: var(--text-light); font-size: 0.9rem; }
        .nav-search input { border: none; background: transparent; padding: 4px 0; width: 130px; font-size: 0.9rem; color: var(--text-primary); }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--text-primary); padding: 4px 8px; }

        /* ===== 移动端菜单 ===== */
        @media (max-width: 1024px) {
            .nav-links { display: none; position: absolute; top: var(--header-h); left: 0; width: 100%; background: var(--bg-card); flex-direction: column; padding: 16px 24px; gap: 4px; box-shadow: var(--shadow-md); border-top: 1px solid var(--border-color); }
            .nav-links.open { display: flex; }
            .nav-links > a, .mega-dropdown > a { width: 100%; padding: 12px 16px; }
            .mega-dropdown-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; width: 100%; padding: 12px 16px; border: none; border-left: 2px solid var(--border-color); margin-left: 8px; display: none; }
            .mega-dropdown.open .mega-dropdown-menu { display: block; }
            .mega-grid { grid-template-columns: 1fr; }
            .nav-toggle { display: block; }
            .nav-search input { width: 100px; }
        }
        @media (max-width: 640px) {
            .nav-wrap { gap: 12px; }
            .nav-search input { width: 80px; }
            .nav-logo { font-size: 1.2rem; }
            .nav-logo i { font-size: 1.1rem; }
            .container { padding: 0 16px; }
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            margin-top: var(--header-h);
            position: relative; min-height: 380px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(232,64,64,0.70) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            overflow: hidden; text-align: center;
        }
        .category-hero::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 60px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .category-hero-content { position: relative; z-index: 2; max-width: 720px; padding: 60px 20px; }
        .category-hero-content h1 { color: var(--text-white); font-size: 3rem; margin-bottom: 16px; text-shadow: 0 4px 20px rgba(0,0,0,0.2); }
        .category-hero-content p { color: rgba(255,255,255,0.85); font-size: 1.2rem; margin-bottom: 28px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.15); backdrop-filter: blur(8px);
            padding: 6px 18px; border-radius: 40px; color: var(--text-white);
            font-size: 0.85rem; font-weight: 500; margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.20);
        }
        .hero-badge i { color: var(--accent); }
        .hero-stats { display: flex; gap: 40px; justify-content: center; margin-top: 32px; flex-wrap: wrap; }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--text-white); display: block; line-height: 1.2; }
        .hero-stat .label { font-size: 0.85rem; color: rgba(255,255,255,0.7); }
        @media (max-width: 768px) {
            .category-hero { min-height: 300px; }
            .category-hero-content h1 { font-size: 2rem; }
            .category-hero-content p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.5rem; }
        }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-section-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-header { text-align: center; max-width: 680px; margin: 0 auto 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { color: var(--text-secondary); font-size: 1.05rem; }
        .section-header.light h2 { color: var(--text-white); }
        .section-header.light p { color: rgba(255,255,255,0.7); }
        .section-tag {
            display: inline-flex; align-items: center; gap: 6px;
            background: rgba(232,64,64,0.08); color: var(--primary);
            padding: 4px 14px; border-radius: 40px; font-size: 0.8rem; font-weight: 600;
            margin-bottom: 12px; letter-spacing: 0.3px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            overflow: hidden; box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-color);
            display: flex; flex-direction: column;
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .card-img { width: 100%; height: 200px; object-fit: cover; }
        .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .card-body p { font-size: 0.92rem; color: var(--text-secondary); flex: 1; margin-bottom: 16px; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-light); }
        .card-meta i { margin-right: 4px; }
        .card-link { margin-top: auto; }
        .card-link a { color: var(--primary); font-weight: 600; font-size: 0.92rem; display: inline-flex; align-items: center; gap: 6px; }
        .card-link a:hover { gap: 10px; }
        .card-badge {
            display: inline-block; padding: 2px 12px; border-radius: 40px;
            font-size: 0.72rem; font-weight: 600; background: rgba(232,64,64,0.08);
            color: var(--primary); margin-bottom: 8px; align-self: flex-start;
        }
        @media (max-width: 1024px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } .section { padding: 48px 0; } }

        /* ===== 特色介绍区 ===== */
        .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .intro-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
        .intro-image img { width: 100%; height: 400px; object-fit: cover; transition: transform 0.6s; }
        .intro-image:hover img { transform: scale(1.03); }
        .intro-text h2 { margin-bottom: 16px; }
        .intro-text p { font-size: 1.05rem; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
        .intro-feat { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--bg-card); border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); }
        .intro-feat i { font-size: 1.2rem; color: var(--primary); width: 32px; text-align: center; }
        .intro-feat span { font-size: 0.92rem; font-weight: 500; }
        @media (max-width: 768px) { .intro-grid { grid-template-columns: 1fr; gap: 32px; } .intro-features { grid-template-columns: 1fr; } .intro-image img { height: 260px; } }

        /* ===== 数据 / 统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            background: var(--bg-card); border-radius: var(--radius-md);
            padding: 32px 20px; text-align: center; border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-card .num { font-size: 2.4rem; font-weight: 800; color: var(--primary); display: block; line-height: 1.2; }
        .stat-card .label { font-size: 0.92rem; color: var(--text-secondary); margin-top: 4px; }
        .stat-card i { font-size: 2rem; color: var(--primary-light); margin-bottom: 12px; display: block; }
        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 480px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ===== 列表 / 排行 ===== */
        .list-section .list-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .list-item {
            display: flex; align-items: flex-start; gap: 16px;
            padding: 16px 20px; background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border-color); box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .list-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .list-item .rank { font-size: 1.6rem; font-weight: 800; color: var(--primary-light); min-width: 40px; text-align: center; line-height: 1.2; }
        .list-item .info h4 { font-size: 1rem; margin-bottom: 4px; }
        .list-item .info p { font-size: 0.85rem; color: var(--text-light); margin: 0; }
        .list-item .meta { font-size: 0.78rem; color: var(--text-light); margin-top: 4px; display: flex; gap: 12px; }
        @media (max-width: 768px) { .list-section .list-grid { grid-template-columns: 1fr; } }

        /* ===== FAQ ===== */
        .faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: var(--bg-card); border-radius: var(--radius-sm); border: 1px solid var(--border-color); overflow: hidden; box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 18px 24px; display: flex; justify-content: space-between; align-items: center;
            font-size: 1rem; font-weight: 600; cursor: pointer; color: var(--text-primary);
            transition: background var(--transition); gap: 12px;
        }
        .faq-question:hover { background: rgba(232,64,64,0.03); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer { padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-secondary); display: none; }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg); padding: 60px 40px; text-align: center;
            color: var(--text-white); position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -50%; right: -30%; width: 400px; height: 400px;
            background: rgba(255,255,255,0.05); border-radius: 50%;
        }
        .cta-section h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 16px; position: relative; z-index: 1; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.05rem; max-width: 560px; margin: 0 auto 28px; position: relative; z-index: 1; }
        .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }
        .btn {
            display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px;
            border-radius: 40px; font-weight: 600; font-size: 1rem;
            transition: all var(--transition); border: none; cursor: pointer;
        }
        .btn-primary { background: var(--text-white); color: var(--primary); }
        .btn-primary:hover { background: var(--accent); color: var(--text-primary); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,0,0,0.15); }
        .btn-outline { background: transparent; color: var(--text-white); border: 2px solid rgba(255,255,255,0.4); }
        .btn-outline:hover { border-color: var(--text-white); background: rgba(255,255,255,0.10); transform: translateY(-2px); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.75);
            padding: 60px 0 0; margin-top: 80px;
        }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .nav-logo { color: var(--text-white); margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.92rem; color: rgba(255,255,255,0.55); max-width: 300px; }
        .footer-social { display: flex; gap: 16px; margin-top: 20px; }
        .footer-social a { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.6); font-size: 1.1rem; transition: all var(--transition); }
        .footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
        .footer-col h4 { color: var(--text-white); margin-bottom: 16px; font-size: 1rem; }
        .footer-col a { display: block; padding: 4px 0; font-size: 0.9rem; color: rgba(255,255,255,0.55); transition: color var(--transition); }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary-light); }
        @media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 16px 0 0; font-size: 0.85rem; color: var(--text-light);
            display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-light); }
        .breadcrumb .sep { color: var(--text-light); }

        /* ===== 标签 ===== */
        .tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
        .tag {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 16px; border-radius: 40px; font-size: 0.82rem;
            background: var(--bg-card); border: 1px solid var(--border-color);
            color: var(--text-secondary); transition: all var(--transition);
            cursor: pointer;
        }
        .tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(232,64,64,0.04); }
        .tag i { font-size: 0.75rem; }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .mt-16 { margin-top: 16px; }
        .mt-32 { margin-top: 32px; }
        .gap-12 { gap: 12px; }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            h1 { font-size: 2rem; }
            h2 { font-size: 1.5rem; }
            .cta-section { padding: 40px 20px; }
            .cta-section h2 { font-size: 1.5rem; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
        }
        @media (max-width: 480px) {
            .category-hero-content h1 { font-size: 1.6rem; }
            .hero-badge { font-size: 0.75rem; padding: 4px 12px; }
        }

        /* ===== 滚动提示 ===== */
        .scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2; color: rgba(255,255,255,0.5); font-size: 1.5rem; animation: bounce 2s infinite; }
        @keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-light: #ff6b6b;
            --primary-dark: #c1121f;
            --secondary: #457b9d;
            --secondary-light: #6ba3c7;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1d3557;
            --text: #212529;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .nav-logo i { font-size: 1.6rem; color: var(--primary); }
        .nav-logo:hover { color: var(--primary-dark); transform: scale(1.02); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }
        .nav-links > a,
        .mega-dropdown > a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links > a i,
        .mega-dropdown > a i { font-size: 1rem; color: var(--primary-light); }
        .nav-links > a:hover,
        .mega-dropdown > a:hover { background: rgba(230,57,70,0.08); color: var(--primary); }
        .nav-links > a.active,
        .mega-dropdown > a.active { background: rgba(230,57,70,0.12); color: var(--primary); font-weight: 600; }
        .nav-links > a.active i,
        .mega-dropdown > a.active i { color: var(--primary); }

        /* Mega Dropdown */
        .mega-dropdown { position: relative; }
        .mega-dropdown-menu {
            position: absolute;
            top: calc(100% + 12px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(0,0,0,0.06);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            padding: 20px;
            min-width: 520px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: var(--transition);
            z-index: 100;
        }
        .mega-dropdown:hover .mega-dropdown-menu {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .mega-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            background: rgba(0,0,0,0.02);
            transition: var(--transition);
            color: var(--text);
        }
        .mega-item:hover { background: rgba(230,57,70,0.08); color: var(--primary); transform: translateY(-2px); }
        .mega-item-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(230,57,70,0.10);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .mega-item-icon.alt { background: rgba(69,123,157,0.10); color: var(--secondary); }
        .mega-item-text { display: flex; flex-direction: column; }
        .mega-item-text strong { font-size: 0.95rem; font-weight: 600; }
        .mega-item-text span { font-size: 0.82rem; color: var(--text-light); }

        /* 导航右侧 */
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 6px 16px;
            transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(230,57,70,0.12); }
        .nav-search i { color: var(--text-light); font-size: 0.95rem; }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 4px 0;
            width: 100px;
            color: var(--text);
            font-size: 0.9rem;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-toggle { display: none; background: none; font-size: 1.4rem; color: var(--text); cursor: pointer; padding: 6px; border-radius: 8px; transition: var(--transition); }
        .nav-toggle:hover { background: rgba(0,0,0,0.05); }

        /* ===== 文章页 Banner ===== */
        .article-banner {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2a4a6b 100%);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-banner h1 {
            font-size: 2.4rem;
            color: var(--text-white);
            max-width: 800px;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { font-size: 0.9rem; }
        .article-category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            background: rgba(230,57,70,0.85);
            color: #fff;
            font-size: 0.82rem;
            font-weight: 500;
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-alt);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-content {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px 44px;
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h2 { font-size: 1.6rem; margin: 36px 0 16px; color: var(--bg-dark); }
        .article-content h3 { font-size: 1.25rem; margin: 28px 0 12px; color: var(--text); }
        .article-content p { margin-bottom: 1.2em; }
        .article-content img { border-radius: var(--radius-sm); margin: 24px 0; }
        .article-content ul, .article-content ol { margin: 16px 0; padding-left: 24px; }
        .article-content li { margin-bottom: 8px; list-style: disc; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: rgba(230,57,70,0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content a { color: var(--primary); font-weight: 500; text-decoration: underline; }
        .article-content a:hover { color: var(--primary-dark); }

        /* 侧边栏 */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            color: var(--text);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { color: var(--primary); padding-left: 8px; }
        .sidebar-list a i { color: var(--primary-light); margin-top: 3px; font-size: 0.85rem; }
        .sidebar-list a span { font-size: 0.92rem; }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 40px;
            background: var(--bg);
            color: var(--text-light);
            font-size: 0.82rem;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* 未找到提示 */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 3.6rem; color: var(--text-light); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; color: var(--text); }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-box .btn { display: inline-block; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            background: var(--primary);
            color: #fff;
        }
        .btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.30); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.80);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .nav-logo i { color: var(--primary-light); }
        .footer-brand p { font-size: 0.92rem; line-height: 1.8; color: rgba(255,255,255,0.60); margin-bottom: 20px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.60);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--primary);
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 6px; }
        .footer-col a i { width: 20px; margin-right: 6px; color: var(--primary-light); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.40);
        }
        .footer-bottom a { color: rgba(255,255,255,0.40); }
        .footer-bottom a:hover { color: #fff; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --header-h: 64px; }
            .nav-links { display: none; }
            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                border-bottom: 1px solid var(--border);
                padding: 16px 20px;
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-links.open > a,
            .nav-links.open .mega-dropdown > a { padding: 12px 16px; width: 100%; }
            .mega-dropdown-menu {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                box-shadow: none;
                border: none;
                background: transparent;
                padding: 8px 0 8px 16px;
                min-width: auto;
            }
            .mega-dropdown:hover .mega-dropdown-menu { transform: none; }
            .mega-grid { grid-template-columns: 1fr; }
            .nav-toggle { display: flex; }
            .nav-search { display: none; }
            .article-banner { padding: 60px 0 40px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-content { padding: 24px 20px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-meta { flex-direction: column; gap: 8px; }
            .article-content { font-size: 0.98rem; padding: 20px 16px; }
            .sidebar-card { padding: 20px 16px; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }