```css
/* 桃花视频 - 全站样式表 */
:root {
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --text-primary: #1F2937;
  --text-secondary: #334155;
  --text-heading: #0F172A;
  --accent: #ec4899;
  --accent-dark: #db2777;
  --accent-light: #fbcfe8;
  --border: #e2e8f0;
  --card-bg: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.85);
  --footer-bg: #1e1b4b;
  --footer-text: #e0e7ff;
  --footer-heading: #ffffff;
  --code-bg: #f1f5f9;
  --shadow: 0 8px 30px rgba(236, 72, 153, 0.08);
  --shadow-hover: 0 12px 40px rgba(236, 72, 153, 0.15);
  --max-width: 1280px;
  --gradient-main: linear-gradient(135deg, #fdf2f8 0%, #fce7f3 50%, #fbcfe8 100%);
  --gradient-banner: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4c1d95 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #fdf2f8 100%);
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-soft: #1e293b;
  --text-primary: #e2e8f0;
  --text-secondary: #cbd5e1;
  --text-heading: #f8fafc;
  --accent: #f472b6;
  --accent-dark: #ec4899;
  --accent-light: #4c1d95;
  --border: #334155;
  --card-bg: #1e293b;
  --nav-bg: rgba(15, 23, 42, 0.85);
  --footer-bg: #020617;
  --footer-text: #cbd5e1;
  --footer-heading: #ffffff;
  --code-bg: #1e293b;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.4);
  --gradient-main: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  --gradient-banner: linear-gradient(135deg, #020617 0%, #1e1b4b 50%, #4c1d95 100%);
  --gradient-card: linear-gradient(145deg, #1e293b 0%, #312e81 100%);
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(148, 163, 184, 0.2);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  transition: var(--transition);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-main);
  opacity: 0.3;
  z-index: -1;
  pointer-events: none;
}

a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

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

a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
}

a:hover::after {
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-heading);
  font-weight: 700;
  line-height: 1.3;
  margin: 0.5em 0 0.3em;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  position: relative;
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--gradient-banner);
  border-radius: 3px;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
}

h4 {
  font-size: 1.1rem;
}

p {
  margin: 0.8rem 0;
  color: var(--text-primary);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

/* 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(--glass-border);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  gap: 1rem;
}

.logo {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-heading);
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  cursor: pointer;
  transition: var(--transition);
}

.logo:hover {
  transform: scale(1.05);
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  font-weight: 500;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
  border-radius: 2px;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.8rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-heading);
  transition: var(--transition);
  line-height: 1;
}

.menu-toggle:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  border-radius: 50px;
  padding: 0.3rem 0.4rem 0.3rem 1rem;
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.search-box:focus-within {
  box-shadow: 0 4px 20px rgba(236, 72, 153, 0.15);
  border-color: var(--accent);
}

.search-box input {
  border: none;
  background: transparent;
  padding: 0.4rem 0.6rem;
  color: var(--text-primary);
  outline: none;
  font-size: 0.95rem;
  width: 180px;
  transition: var(--transition);
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.search-box button {
  background: var(--gradient-banner);
  border: none;
  border-radius: 50px;
  color: white;
  padding: 0.5rem 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.search-box button:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 15px rgba(236, 72, 153, 0.3);
}

/* Banner */
.banner {
  background: var(--gradient-banner);
  color: white;
  padding: 4rem 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(236, 72, 153, 0.2) 0%, transparent 50%), radial-gradient(circle at 70% 50%, rgba(139, 92, 246, 0.2) 0%, transparent 50%);
  animation: gradientMove 15s ease infinite;
  z-index: -1;
}

@keyframes gradientMove {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(5%, -5%) rotate(5deg); }
  50% { transform: translate(-5%, 5%) rotate(-5deg); }
  75% { transform: translate(5%, 5%) rotate(3deg); }
}

.banner h1 {
  color: white;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  -webkit-text-fill-color: white;
  margin-bottom: 1rem;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
}

.banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 2vw, 1.25rem);
  max-width: 700px;
  margin: 1.5rem auto;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.2);
}

.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  padding: 0.8rem 2.2rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
  box-shadow: 0 4px 20px rgba(236, 72, 153, 0.3);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(236, 72, 153, 0.4);
  color: white;
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(0);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin: 3rem 0;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-banner);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

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

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.card h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--accent);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 特色区块 */
.feature-section {
  background: var(--glass-bg);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  margin: 2.5rem 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  transition: var(--transition);
}

.feature-section:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

/* 表格 */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 2rem 0;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

th {
  background: var(--gradient-banner);
  color: white;
  font-weight: 600;
  text-align: left;
  padding: 1rem 1.2rem;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

td {
  padding: 1rem 1.2rem;
  border-top: 1px solid var(--border);
  color: var(--text-primary);
  transition: var(--transition);
}

tr:hover td {
  background: var(--bg-soft);
}

tr:last-child td:first-child {
  border-bottom-left-radius: var(--radius-lg);
}

tr:last-child td:last-child {
  border-bottom-right-radius: var(--radius-lg);
}

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 1.2rem 0;
  cursor: pointer;
  transition: var(--transition);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  font-weight: 600;
  color: var(--text-heading);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  transition: var(--transition);
  padding: 0.5rem 0;
}

.faq-question span {
  font-size: 1.5rem;
  font-weight: 300;
  transition: var(--transition);
  color: var(--accent);
  min-width: 24px;
  text-align: center;
}

.faq-item:hover .faq-question {
  color: var(--accent);
  padding-left: 0.5rem;
}

.faq-answer {
  margin-top: 0.8rem;
  color: var(--text-primary);
  display: none;
  padding: 0 1rem;
  border-left: 3px solid var(--accent);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-question span {
  transform: rotate(45deg);
  color: var(--accent-dark);
}

/* 页脚 */
footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 5rem;
  position: relative;
  overflow: hidden;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-banner);
}

footer h4 {
  color: var(--footer-heading);
  font-size: 1.2rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

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

footer a {
  color: var(--footer-text);
  text-decoration: underline;
  transition: var(--transition);
}

footer a:hover {
  color: var(--accent);
  text-decoration: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2.5rem;
  padding: 1rem 0;
}

.copyright {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: 2rem;
  color: var(--footer-text);
  font-size: 0.9rem;
  opacity: 0.8;
}

/* 文章列表 */
.article-list {
  display: grid;
  gap: 1.5rem;
}

.article-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  transition: var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.article-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--gradient-banner);
  opacity: 0;
  transition: var(--transition);
}

.article-item:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.article-item:hover::before {
  opacity: 1;
}

.article-item h3 {
  font-size: 1.2rem;
  margin-top: 0;
  transition: var(--transition);
}

.article-item:hover h3 {
  color: var(--accent);
}

.article-item .meta {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 0.8rem;
  display: inline-block;
  background: var(--accent-light);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-weight: 500;
}

.article-item p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--gradient-banner);
  color: white;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
  border: none;
  z-index: 100;
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 12px 35px rgba(236, 72, 153, 0.4);
}

/* 滚动动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 占位符 */
.svg-placeholder {
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  border: 1px solid var(--border);
  min-height: 150px;
}

/* 移动端适配 */
@media (max-width: 1024px) {
  .nav-links {
    gap: 1.5rem;
  }
  
  .search-box input {
    width: 150px;
  }
}

@media (max-width: 900px) {
  .nav-container {
    flex-wrap: wrap;
    padding: 0.8rem 1rem;
  }
  
  .logo {
    font-size: 1.5rem;
  }
  
  .search-box {
    order: 3;
    width: 100%;
    margin-top: 0.5rem;
  }
  
  .search-box input {
    flex: 1;
    width: auto;
  }
  
  .menu-toggle {
    display: block;
    margin-left: auto;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    background: var(--nav-bg);
    padding: 1rem 0;
    border-top: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    gap: 0;
  }
  
  .nav-links.open {
    display: flex;
    animation: slideDown 0.3s ease;
  }
  
  @keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  
  .nav-links a {
    padding: 0.8rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
    width: 100%;
    text-align: center;
  }
  
  .nav-links a:last-child {
    border-bottom: none;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .banner {
    padding: 3rem 1rem;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .feature-section {
    padding: 1.5rem;
  }
  
  footer {
    padding: 2rem 1rem 1rem;
  }
  
  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 42px;
    height: 42px;
    font-size: 1.2rem;
  }
  
  .container {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .banner h1 {
    font-size: 1.8rem;
  }
  
  .banner p {
    font-size: 0.95rem;
  }
  
  .btn {
    padding: 0.7rem 1.8rem;
    font-size: 0.9rem;
  }
  
  .card-grid {
    margin: 2rem 0;
  }
  
  .article-item {
    padding: 1.2rem;
  }
  
  .faq-question {
    font-size: 0.95rem;
  }
  
  .faq-answer {
    padding: 0.8rem;
  }
  
  footer h4 {
    font-size: 1.1rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

/* 深色模式特殊调整 */
[data-theme="dark"] .card {
  background: var(--glass-bg);
}

[data-theme="dark"] .search-box {
  background: var(--glass-bg);
}

[data-theme="dark"] .article-item {
  background: var(--glass-bg);
}

[data-theme="dark"] .card::before,
[data-theme="dark"] .article-item::before {
  background: var(--gradient-banner);
}

/* 打印样式 */
@media print {
  .navbar, .banner, .back-to-top, .footer-grid, .copyright {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
  
  .card, .article-item, .feature-section {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* 无障碍 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-soft);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--accent);
  border-radius: 10px;
  border: 2px solid var(--bg-soft);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-dark);
}

/* 选中文本 */
::selection {
  background: var(--accent);
  color: white;
}

/* 暗色模式切换按钮 */
.theme-toggle {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  z-index: 200;
  background: var(--gradient-banner);
  color: #fff;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.theme-toggle:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(236, 72, 153, 0.4);
}

@media (max-width: 480px) {
  .theme-toggle {
    bottom: 1.5rem;
    left: 1.5rem;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
  }
}
```