```css
/* ===== 香蕉视频 · 紫夜幻境主题 ===== */
/* 基础重置与全局变量 */
:root {
  --bg-primary: #0a0a18;
  --bg-secondary: #14142a;
  --bg-card: #1a1a35;
  --bg-glass: rgba(26, 26, 53, 0.6);
  --border-color: #2d2d55;
  --text-primary: #e0e0f0;
  --text-secondary: #d0d0e8;
  --text-muted: #8888aa;
  --accent: #8b5cf6;
  --accent-light: #a78bfa;
  --accent-hover: #c4b5fd;
  --gradient-accent: linear-gradient(135deg, #7c3aed, #6d28d9);
  --gradient-card: linear-gradient(145deg, #1e1e3a, #2d2d55);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

/* 暗色模式（默认） */
:root {
  color-scheme: dark;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  background: linear-gradient(145deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 链接 */
a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition-fast), text-decoration var(--transition-fast);
}
a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* 标题 */
h1, h2, h3, h4, h5, h6 {
  color: #f0f0ff;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

h2 {
  font-size: 1.75rem;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin: 2rem 0 1.5rem;
  position: relative;
}

h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
}

p {
  margin-bottom: 1rem;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 容器 */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 头部导航 ===== */
.header {
  background-color: rgba(13, 13, 32, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo h1 {
  margin: 0;
  font-size: 2.2rem;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.03em;
  transition: opacity var(--transition-fast);
}

.logo h1:hover {
  opacity: 0.85;
}

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

.nav a {
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

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

.nav a:hover {
  color: var(--accent-light);
  text-decoration: none;
}

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

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

.nav a.active::after {
  width: 100%;
}

/* ===== 网格布局 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 15px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s ease both;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

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

.card img {
  border-radius: 10px;
  background: var(--gradient-card);
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-normal), filter var(--transition-normal);
}

.card:hover img {
  transform: scale(1.03);
  filter: brightness(1.1);
}

.card h3 {
  margin: 12px 0 6px;
  font-size: 1.2rem;
  transition: color var(--transition-fast);
}

.card:hover h3 {
  color: var(--accent-light);
}

.card p {
  color: var(--text-secondary);
  margin: 4px 0;
  font-size: 0.9rem;
}

/* 标签 */
.tag {
  display: inline-block;
  background: var(--border-color);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  margin: 3px 4px 0 0;
  color: #b0b0d0;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  cursor: default;
}

.tag:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
}

/* ===== 按钮 ===== */
.btn-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  margin: 1.5rem 0;
}

.btn {
  background: var(--gradient-accent);
  color: #ffffff;
  padding: 12px 28px;
  border-radius: 40px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  color: #fff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.3);
}

.btn:hover::after {
  width: 300px;
  height: 300px;
}

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

/* ===== 侧边栏 ===== */
.sidebar {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 20px;
  margin: 30px 0;
  box-shadow: var(--shadow-md);
}

.sidebar h3 {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
  margin-bottom: 1rem;
  color: var(--accent-light);
}

.sidebar ul {
  list-style: none;
  padding: 0;
}

.sidebar li {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
  color: var(--text-secondary);
  transition: padding-left var(--transition-fast), color var(--transition-fast);
}

.sidebar li:hover {
  padding-left: 8px;
  color: var(--text-primary);
}

.sidebar li:last-child {
  border-bottom: none;
}

/* ===== 评论区 ===== */
.comment-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 15px;
  margin-bottom: 15px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  animation: fadeInUp 0.4s ease both;
}

.comment-box:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}

.comment-user {
  color: var(--accent-light);
  font-weight: 600;
  font-size: 1rem;
}

.comment-time {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-left: 12px;
}

.comment-box p {
  margin-top: 8px;
  margin-bottom: 0;
  color: var(--text-secondary);
}

/* ===== 详情区块 ===== */
.detail-section {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin: 30px 0;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.detail-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0.3;
}

.detail-section article {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
}

.detail-section h3 {
  color: var(--accent-light);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.detail-section p {
  color: var(--text-secondary);
}

.detail-section strong {
  color: var(--text-primary);
}

/* ===== 角色卡片 ===== */
.char-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.char-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 15px;
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  animation: fadeInUp 0.5s ease both;
}

.char-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

.char-card img {
  border-radius: 50%;
  width: 120px;
  height: 120px;
  object-fit: cover;
  margin: 0 auto 15px;
  border: 3px solid var(--border-color);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

.char-card:hover img {
  border-color: var(--accent);
  transform: scale(1.05);
}

.char-card h3 {
  color: var(--accent-light);
  margin-bottom: 8px;
}

.char-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

/* ===== 平台介绍 ===== */
.platform-text {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
}

.platform-text h2 {
  color: var(--accent-light);
}

.platform-text p {
  color: var(--text-secondary);
}

.platform-text strong {
  color: var(--text-primary);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-primary);
  padding: 30px 0;
  margin-top: 40px;
  border-top: 1px solid var(--border-color);
}

.footer a {
  color: var(--accent-light);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}

.footer-links span,
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* 滚动显现动画 */
section {
  animation: fadeIn 0.8s ease both;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container {
    padding: 0 16px;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
  }

  .char-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 10px;
  }

  .nav {
    justify-content: center;
    gap: 1rem;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 5px;
  }

  .nav a {
    white-space: nowrap;
    font-size: 0.9rem;
  }

  .grid {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
  }

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .sidebar {
    padding: 16px;
  }

  .detail-section {
    padding: 20px;
  }

  .detail-section article {
    padding: 16px;
  }

  .platform-text {
    padding: 20px;
  }

  .footer-links {
    gap: 12px;
  }

  .footer-links span,
  .footer-links a {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .btn-group {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .comment-time {
    display: block;
    margin-left: 0;
    margin-top: 4px;
  }

  .sidebar li {
    font-size: 0.85rem;
  }
}

/* ===== 无障碍与对比度 ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== 打印样式 ===== */
@media print {
  .header,
  .footer,
  .sidebar,
  .btn-group {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card,
  .detail-section,
  .platform-text,
  .comment-box {
    background: #fff;
    border-color: #ccc;
    box-shadow: none;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}
```