```css

/* =========================================================
   石榴视频 - 高清影视在线观看
   设计系统：现代轻奢 / 高清质感 / 品牌深红 + 暗色模式
   作者：资深UI设计 & 前端工程师
   日期：2025
   ========================================================= */

/* ---------- 1. 设计令牌 (Design Tokens) ---------- */
:root {
  /* 色彩系统 - 高可读性 & 对比度 */
  --bg-primary: #F8FAFC;          /* 页面主背景（浅色模式） */
  --bg-secondary: #F1F5F9;        /* 次级背景/卡片hover */
  --bg-card: #FFFFFF;             /* 卡片背景 */
  --bg-footer: #0F172A;           /* 深色页脚 */
  --bg-nav: rgba(255, 255, 255, 0.85); /* 毛玻璃导航 */
  --bg-glass: rgba(255, 255, 255, 0.6); /* 毛玻璃效果背景 */
  --bg-hero-gradient-start: #FFFFFF;
  --bg-hero-gradient-end: #FEE2E2;

  /* 文本颜色 - 严格保证对比度 */
  --text-primary: #1E293B;        /* 主文本（深灰蓝） */
  --text-secondary: #334155;      /* 次级文本 */
  --text-heading: #0F172A;        /* 标题/强调 */
  --text-accent: #B91C1C;         /* 品牌深红（用于链接/按钮/重点） */
  --text-accent-light: #DC2626;   /* 亮红（暗色模式用） */
  --text-footer: #CBD5E1;
  --text-footer-heading: #F8FAFC;
  --text-placeholder: #64748B;

  /* 边框 & 分隔线 */
  --border-light: #E2E8F0;
  --border-medium: #CBD5E1;

  /* 按钮 */
  --btn-bg: #B91C1C;
  --btn-text: #FFFFFF;
  --btn-hover-bg: #991B1B;
  --btn-outline-border: #B91C1C;
  --btn-outline-text: #B91C1C;
  --btn-outline-hover-bg: #B91C1C;
  --btn-outline-hover-text: #FFFFFF;

  /* 阴影 & 动效 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
  --shadow-accent: 0 4px 14px rgba(185, 28, 28, 0.25);

  /* 布局 */
  --max-width: 1280px;
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-full: 9999px;

  /* 渐变 */
  --gradient-hero: linear-gradient(135deg, #FFFFFF 0%, #FEF3C7 50%, #FEE2E2 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.5) 100%);
  --gradient-text: linear-gradient(135deg, #B91C1C, #F97316);
}

/* ---------- 暗色模式 ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0B1120;
    --bg-secondary: #111827;
    --bg-card: #1E293B;
    --bg-footer: #020617;
    --bg-nav: rgba(15, 23, 42, 0.9);
    --bg-glass: rgba(30, 41, 59, 0.7);
    --bg-hero-gradient-start: #111827;
    --bg-hero-gradient-end: #1E293B;

    --text-primary: #E2E8F0;
    --text-secondary: #CBD5E1;
    --text-heading: #F8FAFC;
    --text-accent: #F87171;
    --text-accent-light: #FCA5A5;
    --text-footer: #CBD5E1;
    --text-footer-heading: #F8FAFC;
    --text-placeholder: #94A3B8;

    --border-light: #334155;
    --border-medium: #475569;

    --btn-bg: #DC2626;
    --btn-text: #FFFFFF;
    --btn-hover-bg: #B91C1C;
    --btn-outline-border: #F87171;
    --btn-outline-text: #F87171;
    --btn-outline-hover-bg: #DC2626;
    --btn-outline-hover-text: #FFFFFF;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    --shadow-accent: 0 4px 14px rgba(220, 38, 38, 0.3);

    --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #111827 100%);
    --gradient-card: linear-gradient(145deg, rgba(30,41,59,0.9) 0%, rgba(15,23,42,0.6) 100%);
    --gradient-text: linear-gradient(135deg, #F87171, #FBBF24);
  }
}

/* ---------- 2. 基础重置与全局样式 ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

img, svg {
  max-width: 100%;
  display: block;
}

a {
  color: var(--text-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--text-accent-light);
}

ul, ol {
  list-style-position: inside;
  padding-left: 1.2rem;
}

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

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-accent);
}

/* ---------- 3. 导航栏 (毛玻璃) ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.8rem 24px;
  gap: 1rem;
}

.logo a {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.logo svg {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.nav-links a:hover {
  color: var(--text-accent);
  border-bottom-color: var(--text-accent);
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-secondary);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.3rem 0.3rem 1rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
}

.search-box:focus-within {
  border-color: var(--text-accent);
  box-shadow: var(--shadow-accent);
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-primary);
  padding: 0.4rem 0.5rem;
  outline: none;
  width: 160px;
  font-size: 0.9rem;
}

.search-box input::placeholder {
  color: var(--text-placeholder);
}

.search-box button {
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: var(--radius-full);
  padding: 0.5rem 1.2rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.search-box button:hover {
  background: var(--btn-hover-bg);
  transform: scale(1.02);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 2.2rem;
  color: var(--text-heading);
  cursor: pointer;
  line-height: 1;
  padding: 0.2rem;
}

/* ---------- 4. Hero Banner (渐变 + 毛玻璃卡片) ---------- */
.hero {
  background: var(--gradient-hero);
  padding: 4rem 0 3rem;
  position: relative;
  overflow: hidden;
}

/* 装饰圆 */
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(185, 28, 28, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text {
  padding: 1rem 0;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
  color: var(--text-heading);
  margin-bottom: 1rem;
  line-height: 1.15;
  letter-spacing: -0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 1.8rem;
  max-width: 540px;
  line-height: 1.8;
}

.hero .btn {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 0.9rem 2.2rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  display: inline-block;
  border: none;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-accent);
}

.hero .btn:hover {
  background: var(--btn-hover-bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(185, 28, 28, 0.35);
}

/* 统计数字 */
.stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
  padding: 0.8rem 1.2rem;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-heading);
  display: block;
  line-height: 1.2;
}

.stat-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  margin-top: 0.2rem;
}

/* Hero 右侧视觉 */
.hero-visual {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  text-align: center;
  transition: transform 0.3s ease;
}

.hero-visual:hover {
  transform: translateY(-4px);
}

.hero-visual svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* ---------- 5. 通用卡片样式 ---------- */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  backdrop-filter: blur(8px);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--text-accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}

.card:hover::after {
  opacity: 1;
}

.card h3 {
  color: var(--text-heading);
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.card p {
  color: var(--text-primary);
  line-height: 1.7;
}

/* ---------- 6. 区块标题 ---------- */
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-heading);
  margin: 3rem 0 2rem;
  position: relative;
  padding-bottom: 0.8rem;
  letter-spacing: -0.01em;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 4px;
  background: var(--gradient-text);
  border-radius: 4px;
}

/* ---------- 7. 网格布局 ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

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

/* ---------- 8. 文章卡片 ---------- */
.article-item {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  border: 1px solid var(--border-light);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--text-accent);
}

.article-item h4 {
  font-size: 1.2rem;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
  font-weight: 700;
  line-height: 1.4;
}

.article-item .meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
}

.article-item p {
  color: var(--text-primary);
  margin-top: 0.5rem;
  flex: 1;
}

.read-more {
  color: var(--text-accent);
  font-weight: 700;
  text-decoration: none;
  margin-top: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap 0.2s ease;
}

.read-more:hover {
  gap: 0.6rem;
  color: var(--text-accent-light);
}

/* ---------- 9. FAQ 手风琴 ---------- */
.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 0.3rem 0;
  transition: background-color 0.2s ease;
}

.faq-question {
  font-weight: 700;
  color: var(--text-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-size: 1.1rem;
  padding: 1.2rem 0;
  transition: color 0.2s ease;
  font-family: inherit;
}

.faq-question:hover {
  color: var(--text-accent);
}

.faq-question span {
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--text-accent);
  transition: transform 0.3s ease;
  line-height: 1;
}

.faq-question[aria-expanded="true"] span {
  transform: rotate(45deg);
}

.faq-answer {
  color: var(--text-primary);
  padding: 0 0 1.2rem;
  line-height: 1.8;
  max-width: 90%;
}

/* ---------- 10. 联系信息区块 ---------- */
.contact-info {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 3rem 0;
  border: 1px solid var(--border-light);
}

.contact-info p {
  color: var(--text-primary);
  margin-bottom: 0.8rem;
  font-size: 1.05rem;
}

.contact-info strong {
  color: var(--text-heading);
  margin-right: 0.5rem;
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  background-color: var(--bg-footer);
  color: var(--text-footer);
  padding: 4rem 0 1.5rem;
  margin-top: 4rem;
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.site-footer h4 {
  color: var(--text-footer-heading);
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  font-weight: 700;
}

.site-footer p {
  color: var(--text-footer);
  font-size: 0.95rem;
}

.site-footer a {
  color: var(--text-footer);
  text-decoration: none;
  opacity: 0.85;
  font-size: 0.95rem;
  display: inline-block;
  margin-bottom: 0.5rem;
  transition: all 0.2s ease;
}

.site-footer a:hover {
  opacity: 1;
  color: var(--text-footer-heading);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.8rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-footer);
  opacity: 0.8;
}

/* ---------- 12. 按钮变体 ---------- */
.btn-outline {
  border: 2px solid var(--btn-outline-border);
  color: var(--btn-outline-text);
  background: transparent;
  padding: 0.6rem 1.6rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  display: inline-block;
}

.btn-outline:hover {
  background-color: var(--btn-outline-hover-bg);
  color: var(--btn-outline-hover-text);
  border-color: var(--btn-outline-hover-bg);
  transform: translateY(-2px);
}

/* ---------- 13. 返回顶部按钮 ---------- */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: none;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.6rem;
  cursor: pointer;
  display: none;
  box-shadow: var(--shadow-accent);
  z-index: 200;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(20px);
}

#backToTop.visible {
  opacity: 1;
  transform: translateY(0);
}

#backToTop:hover {
  background: var(--btn-hover-bg);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(185, 28, 28, 0.4);
}

/* ---------- 14. 工具类 ---------- */
.text-center { text-align: center; }
.mt-3 { margin-top: 2.5rem; }
.mb-2 { margin-bottom: 1.5rem; }

/* ---------- 15. 滚动动画 (Intersection Observer) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 暗色模式下卡片微调 */
@media (prefers-color-scheme: dark) {
  .card,
  .article-item,
  .hero-visual {
    background: var(--gradient-card);
    border-color: var(--border-light);
  }
  
  .nav-links a,
  .search-box input {
    color: var(--text-primary);
  }
  
  .logo a {
    color: var(--text-heading);
  }
}

/* ---------- 16. 响应式设计 ---------- */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .hero-visual {
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .nav-wrapper {
    flex-wrap: wrap;
    padding: 0.6rem 16px;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    padding: 1rem 0;
    border-radius: var(--radius-md);
    margin-top: 0.5rem;
    box-shadow: var(--shadow-md);
  }
  
  .nav-links.show {
    display: flex;
  }
  
  .nav-links li {
    width: 100%;
    text-align: center;
  }
  
  .nav-links a {
    display: block;
    padding: 0.8rem 1rem;
    font-size: 1.1rem;
  }
  
  .menu-toggle {
    display: block;
    order: -1;
  }
  
  .search-box {
    order: 3;
    width: 100%;
    margin-top: 0.5rem;
  }
  
  .search-box input {
    flex: 1;
    width: auto;
  }
  
  .hero {
    padding: 2.5rem 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .stats {
    gap: 1rem;
  }
  
  .stat-item {
    padding: 0.6rem 1rem;
  }
  
  .stat-number {
    font-size: 1.8rem;
  }
  
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
    margin: 2.5rem 0 1.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .contact-info {
    padding: 1.5rem;
  }
  
  .faq-answer {
    max-width: 100%;
  }
  
  #backToTop {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 46px;
    height: 46px;
    font-size: 1.4rem;
  }
}

@media (max-width: 480px) {
  .logo a {
    font-size: 1.4rem;
  }
  
  .logo svg {
    width: 30px;
    height: 30px;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .stats {
    flex-direction: column;
    align-items: center;
  }
  
  .stat-item {
    width: 100%;
  }
  
  .search-box {
    order: 3;
    width: 100%;
  }
  
  .search-box input {
    width: 100%;
  }
}

/* ---------- 17. 高对比度模式支持 ---------- */
@media (prefers-contrast: more) {
  :root {
    --border-light: #475569;
    --text-primary: #0F172A;
    --text-secondary: #1E293B;
    --text-heading: #000000;
    --btn-bg: #DC2626;
    --btn-hover-bg: #B91C1C;
  }
}

/* ---------- 18. 打印样式 ---------- */
@media print {
  .site-header,
  .site-footer,
  .hero .btn,
  .search-box,
  #backToTop,
  .menu-toggle {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .card,
  .article-item,
  .contact-info {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* ---------- 19. 细节优化 ---------- */
::selection {
  background: var(--text-accent);
  color: white;
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px solid var(--text-accent);
  outline-offset: 2px;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* 卡片图标占位符 */
.svg-placeholder {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 文章网格特殊处理 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
}

/* 联系地图占位 */
.map-placeholder {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-light);
}

/* 链接样式增强 */
.nav-links .active {
  color: var(--text-accent);
  border-bottom-color: var(--text-accent);
}

/* FAQ 展开动画 */
.faq-answer {
  display: none;
}

.faq-question[aria-expanded="true"] + .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 数字动画数字样式 */
.stat-number {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* 文章meta标签 */
.meta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.meta::before {
  content: '📅';
  font-size: 0.9rem;
}

/* 品牌色渐变文本 */
.brand-gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

/* 悬停卡片图标 */
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

/* 暗色模式微调 */
@media (prefers-color-scheme: dark) {
  .card:hover {
    border-color: var(--text-accent);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  }
  
  .article-item:hover {
    border-color: var(--text-accent);
  }
  
  .search-box {
    border-color: var(--border-light);
  }
}

/* 移动端菜单动画 */
@media (max-width: 768px) {
  .nav-links {
    transition: all 0.3s ease;
    max-height: 0;
    overflow: hidden;
    padding: 0;
  }
  
  .nav-links.show {
    max-height: 400px;
    padding: 1rem 0;
  }
}

/* 按钮加载状态 */
.btn-loading {
  position: relative;
  color: transparent !important;
}

.btn-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  border: 2px solid white;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  transform: translate(-50%, -50%);
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* 统计卡片hover效果 */
.stat-item:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.stat-item {
  transition: all 0.3s ease;
}

/* 区块间距 */
section {
  padding: 1rem 0;
}

/* 页脚品牌区域 */
.footer-brand p {
  margin-bottom: 0;
}

/* 文章标题链接 */
.article-item h4 a {
  color: var(--text-heading);
  text-decoration: none;
  transition: color 0.2s;
}

.article-item h4 a:hover {
  color: var(--text-accent);
}

/* 联系信息图标 */
.contact-info p {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.contact-info p::before {
  font-size: 1.1rem;
}

/* 页脚版权 */
.footer-bottom a {
  color: var(--text-footer);
  text-decoration: underline;
  opacity: 0.8;
}

.footer-bottom a:hover {
  opacity: 1;
  color: var(--text-footer-heading);
}

/* 无障碍跳过链接 */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--btn-bg);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0 0 8px 8px;
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

/* 确保所有内容在暗色模式下可读 */
@media (prefers-color-scheme: dark) {
  .hero-visual svg text {
    fill: #E2E8F0;
  }
}

/* 内联SVG样式 */
.hero-visual svg rect {
  fill: var(--bg-secondary);
}

.hero-visual svg text {
  fill: var(--text-primary);
  font-family: inherit;
}

/* 最终优化：确保所有元素盒模型正确 */
*, *::before, *::after {
  box-sizing: border-box;
}

/* 图片响应式 */
img {
  height: auto;
}

/* 表格样式 */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

th {
  font-weight: 700;
  color: var(--text-heading);
  background: var(--bg-secondary);
}

/* 横向滚动 */
.horizontal-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* 结束 */
```