```css
/* ===== 基础重置与变量 ===== */
:root {
  --bg: #f9f7f5;
  --bg-secondary: #f0ece8;
  --text-primary: #2d2a26;
  --text-secondary: #6b6560;
  --text-accent: #1a1714;
  --border-color: #e0d8d2;
  --card-bg: rgba(255, 255, 255, 0.85);
  --brand-color: #e85d3f;
  --brand-dark: #c44a30;
  --brand-light: #f5a08c;
  --footer-bg: #1f1b18;
  --footer-text: #d4cfca;
  --nav-bg: rgba(255, 255, 255, 0.9);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.14);
  --banner-overlay: rgba(0, 0, 0, 0.45);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
  --bg: #12100e;
  --bg-secondary: #1a1715;
  --text-primary: #e8e2dc;
  --text-secondary: #a89f97;
  --text-accent: #f5f0eb;
  --border-color: #2e2926;
  --card-bg: rgba(30, 26, 24, 0.9);
  --brand-color: #f0765a;
  --brand-dark: #e85d3f;
  --brand-light: #f5a08c;
  --footer-bg: #0a0908;
  --footer-text: #b5ada6;
  --nav-bg: rgba(18, 16, 14, 0.92);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
  --banner-overlay: rgba(0, 0, 0, 0.65);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg);
  background-image: 
    radial-gradient(circle at 15% 20%, rgba(232, 93, 63, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(232, 93, 63, 0.03) 0%, transparent 35%);
  color: var(--text-primary);
  line-height: 1.75;
  transition: background-color 0.4s ease, color 0.3s ease;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brand-color);
}

/* ===== 通用链接 ===== */
a {
  color: var(--brand-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}
a:hover {
  color: var(--brand-dark);
  text-decoration: none;
}

/* ===== 容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  z-index: 1000;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-accent);
  letter-spacing: 1px;
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: var(--transition);
}

.logo span {
  color: var(--brand-color);
  -webkit-text-fill-color: var(--brand-color);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--brand-color);
  border-bottom-color: var(--brand-color);
  transform: translateY(-1px);
}

.theme-toggle,
.menu-toggle {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 40px;
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.theme-toggle:hover {
  background: var(--brand-color);
  color: #fff;
  border-color: var(--brand-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232, 93, 63, 0.3);
}

.menu-toggle {
  display: none;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border-color);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
}

.mobile-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 10px 0;
  font-size: 1.05rem;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.mobile-menu a:hover {
  color: var(--brand-color);
  padding-left: 8px;
}

.mobile-menu .theme-toggle {
  margin-top: 0.5rem;
  width: 100%;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 1.5rem 0 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--brand-color);
}

/* ===== Banner 首屏 ===== */
.banner {
  background: linear-gradient(135deg, #2d1b14 0%, #4a2c20 40%, #6b3a28 100%);
  border-radius: var(--radius-lg);
  margin: 1.5rem 0 2.5rem;
  position: relative;
  overflow: hidden;
  min-height: 320px;
  display: flex;
  align-items: center;
  box-shadow: var(--shadow);
  isolation: isolate;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(232, 93, 63, 0.2) 0%, transparent 70%);
  transform: rotate(15deg);
  z-index: -1;
}

.banner::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 40%;
  height: 150%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 60%);
  z-index: -1;
}

.banner-content {
  padding: 3.5rem;
  color: #f8f4f1;
  z-index: 2;
  max-width: 65%;
  animation: fadeInUp 0.8s ease-out;
}

.banner h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  color: #ffffff;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.banner p {
  font-size: 1.15rem;
  color: #e8e0da;
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.banner .btn {
  display: inline-block;
  margin-top: 0.5rem;
  background: var(--brand-color);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 8px 30px rgba(232, 93, 63, 0.4);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.banner .btn:hover {
  background: var(--brand-dark);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(232, 93, 63, 0.5);
}

/* ===== 区块标题 ===== */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-accent);
  margin: 3rem 0 1.8rem;
  border-left: 6px solid var(--brand-color);
  padding-left: 1.2rem;
  position: relative;
  transition: var(--transition);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 1.2rem;
  width: 40px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-color), transparent);
  border-radius: 3px;
}

/* ===== 卡片网格 ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
}

/* ===== 卡片 ===== */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.8rem;
  transition: var(--transition);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-color), var(--brand-light));
  opacity: 0;
  transition: var(--transition);
}

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

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

.card h3 {
  color: var(--text-accent);
  font-size: 1.35rem;
  margin-bottom: 0.8rem;
  font-weight: 700;
  transition: var(--transition);
}

.card h4 {
  color: var(--text-accent);
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  font-weight: 600;
}

.card p {
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  line-height: 1.7;
}

.card a {
  font-weight: 600;
  display: inline-block;
  transition: var(--transition);
}

/* ===== 文章列表 ===== */
.article-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
  border-radius: 8px;
  padding-left: 1rem;
  padding-right: 1rem;
}

.article-item:hover {
  background: var(--card-bg);
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  border-bottom-color: var(--brand-light);
}

.article-item h4 {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  transition: var(--transition);
}

.article-item:hover h4 {
  color: var(--brand-color);
}

.article-item a {
  color: var(--brand-color);
  font-weight: 500;
  white-space: nowrap;
  padding: 6px 16px;
  border-radius: 30px;
  border: 1px solid var(--brand-color);
  transition: var(--transition);
  font-size: 0.9rem;
}

.article-item a:hover {
  background: var(--brand-color);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(232, 93, 63, 0.3);
}

.article-meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: 4px;
  display: block;
}

/* ===== FAQ ===== */
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  background: var(--card-bg);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.faq-item:hover {
  border-color: var(--brand-light);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 600;
  color: var(--text-accent);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  transition: var(--transition);
  user-select: none;
}

.faq-question:hover {
  background: rgba(232, 93, 63, 0.04);
}

.faq-question span {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--brand-color);
  transition: transform 0.3s ease;
  display: inline-block;
}

.faq-answer {
  padding: 0 1.5rem 1.2rem;
  color: var(--text-primary);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  line-height: 1.8;
  animation: slideDown 0.3s ease-out;
}

/* ===== 表格 ===== */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.data-table th {
  background: var(--card-bg);
  color: var(--text-accent);
  text-align: left;
  padding: 14px;
  border: 1px solid var(--border-color);
  font-weight: 600;
}

.data-table td {
  padding: 14px;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  transition: background 0.2s;
}

.data-table tr:hover td {
  background: var(--card-bg);
}

/* ===== Footer ===== */
.footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
  border-radius: 40px 40px 0 0;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand-color), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
}

.footer h4 {
  color: #ffffff;
  margin-bottom: 1.2rem;
  font-size: 1.2rem;
  font-weight: 700;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--brand-color);
  border-radius: 2px;
}

.footer a {
  color: var(--footer-text);
  display: block;
  margin-bottom: 0.6rem;
  transition: var(--transition);
  opacity: 0.85;
}

.footer a:hover {
  color: #ffffff;
  opacity: 1;
  padding-left: 6px;
}

.footer p {
  opacity: 0.8;
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 3rem;
  padding-top: 1.5rem;
  text-align: center;
  color: var(--footer-text);
  font-size: 0.9rem;
  opacity: 0.7;
}

/* ===== 按钮 ===== */
.btn-primary {
  background: var(--brand-color);
  color: #fff;
  border: none;
  padding: 12px 28px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
  box-shadow: 0 6px 20px rgba(232, 93, 63, 0.3);
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(232, 93, 63, 0.4);
}

/* ===== 分割线 ===== */
.divider {
  height: 1px;
  background: var(--border-color);
  margin: 2.5rem 0;
  position: relative;
}

.divider::after {
  content: '';
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--brand-color);
  border-radius: 4px;
  opacity: 0.6;
}

/* ===== 返回顶部按钮 ===== */
#backToTop {
  position: fixed;
  bottom: 40px;
  right: 30px;
  background: var(--brand-color);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 8px 30px rgba(232, 93, 63, 0.4);
  display: none;
  z-index: 999;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

#backToTop:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 12px 40px rgba(232, 93, 63, 0.5);
}

/* ===== 搜索框 ===== */
.search-container {
  position: fixed;
  bottom: 100px;
  right: 30px;
  z-index: 999;
  display: flex;
  gap: 8px;
  background: var(--card-bg);
  padding: 8px;
  border-radius: 50px;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.search-container:focus-within {
  border-color: var(--brand-color);
  box-shadow: 0 8px 30px rgba(232, 93, 63, 0.2);
}

.search-container input {
  padding: 8px 16px;
  border-radius: 40px;
  border: none;
  background: transparent;
  color: var(--text-primary);
  width: 160px;
  outline: none;
  font-size: 0.95rem;
  transition: var(--transition);
}

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

.search-container .btn-primary {
  border-radius: 40px;
  padding: 8px 16px;
  font-size: 1rem;
  background: var(--brand-color);
  border: none;
  cursor: pointer;
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

/* ===== 动画关键帧 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .mobile-menu.open {
    display: flex;
    animation: slideDown 0.3s ease-out;
  }
  
  .banner-content {
    max-width: 100%;
    padding: 2rem;
  }
  
  .banner h1 {
    font-size: 2rem;
  }
  
  .banner p {
    font-size: 1rem;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .grid-3 {
    gap: 1.2rem;
  }
  
  .article-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  
  .article-item a {
    align-self: flex-start;
  }
  
  .search-container {
    bottom: 20px;
    right: 20px;
    left: 20px;
    justify-content: center;
  }
  
  .search-container input {
    flex: 1;
    width: auto;
  }
  
  #backToTop {
    bottom: 80px;
    right: 20px;
  }
  
  .footer {
    border-radius: 24px 24px 0 0;
    padding: 3rem 0 1.5rem;
  }
  
  .container {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  .banner {
    min-height: 240px;
  }
  
  .banner h1 {
    font-size: 1.6rem;
  }
  
  .banner-content {
    padding: 1.5rem;
  }
  
  .banner .btn {
    padding: 10px 24px;
    font-size: 0.9rem;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .card {
    padding: 1.2rem;
  }
  
  .faq-question {
    padding: 1rem 1.2rem;
    font-size: 0.95rem;
  }
  
  .faq-answer {
    padding: 0 1.2rem 1rem;
  }
}

/* ===== 无障碍与细节优化 ===== */
:focus-visible {
  outline: 3px solid var(--brand-color);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar,
  .footer,
  .search-container,
  #backToTop,
  .banner .btn,
  .article-item a {
    display: none !important;
  }
  
  body {
    background: #fff;
    color: #000;
  }
  
  .container {
    max-width: 100%;
  }
}
```