```css
/* ==========================================================================
   AI生成的动漫动作片 - vxtqlo.cn
   风格: 赛博霓虹 · 暗黑渐变 · 毛玻璃拟态
   ========================================================================== */

/* 基础重置与变量 */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 暗色模式（默认） */
  --bg: #07090f;
  --bg-gradient: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(77, 158, 255, 0.15), transparent),
                 radial-gradient(ellipse 60% 40% at 80% 100%, rgba(255, 77, 109, 0.1), transparent);
  --surface: rgba(19, 24, 39, 0.72);
  --surface-solid: #131827;
  --surface-2: rgba(27, 33, 54, 0.85);
  --surface-2-solid: #1b2136;
  --text: #eef2ff;
  --text-secondary: #9aa5c4;
  --accent: #ff4d6d;
  --accent-2: #4d9eff;
  --accent-3: #ffd166;
  --accent-glow: rgba(77, 158, 255, 0.35);
  --accent-2-glow: rgba(255, 77, 109, 0.3);
  --border: rgba(42, 50, 72, 0.9);
  --border-light: rgba(77, 158, 255, 0.25);
  --glass-bg: rgba(19, 24, 39, 0.6);
  --glass-border: rgba(255, 255, 255, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(77, 158, 255, 0.15);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 0.2s ease;
  --max-width: 1200px;
  --header-height: 68px;
}

/* 亮色模式 */
body.light-mode {
  --bg: #f0f3fc;
  --bg-gradient: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(77, 158, 255, 0.12), transparent),
                 radial-gradient(ellipse 60% 40% at 80% 100%, rgba(255, 77, 109, 0.08), transparent);
  --surface: rgba(255, 255, 255, 0.75);
  --surface-solid: #ffffff;
  --surface-2: rgba(238, 241, 249, 0.9);
  --surface-2-solid: #eef1f9;
  --text: #0b0e1a;
  --text-secondary: #4a526b;
  --accent: #e6395a;
  --accent-2: #2b7de9;
  --accent-3: #d4a017;
  --accent-glow: rgba(43, 125, 233, 0.25);
  --accent-2-glow: rgba(230, 57, 90, 0.2);
  --border: rgba(208, 215, 232, 0.9);
  --border-light: rgba(43, 125, 233, 0.2);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(0, 0, 0, 0.06);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 40px rgba(43, 125, 233, 0.08);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background-color: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background-color 0.4s ease, color 0.4s ease;
}

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

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  border-radius: 999px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
}

/* 选中文本 */
::selection {
  background: var(--accent-2);
  color: #fff;
}

a {
  color: var(--accent-2);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
  position: relative;
}

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

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

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

/* ==========================================================================
   导航吸顶 - 毛玻璃
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), var(--shadow-glow);
  border-bottom-color: var(--border-light);
}

body.light-mode .site-header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08), var(--shadow-glow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  min-height: var(--header-height);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -0.01em;
  transition: transform var(--transition);
}

.logo:hover {
  transform: scale(1.03);
  color: var(--text);
}

.logo svg {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 11px;
  box-shadow: 0 0 20px var(--accent-glow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.logo:hover svg {
  box-shadow: 0 0 30px var(--accent-glow), 0 0 60px var(--accent-2-glow);
  transform: rotate(-4deg);
}

/* 主导航 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  position: relative;
}

.nav-links a::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
  background: var(--surface-2);
  box-shadow: 0 0 16px rgba(77, 158, 255, 0.15);
}

.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 4px 20px var(--accent-glow);
}

body.light-mode .nav-links a.active {
  color: #fff;
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 搜索框 */
.search-box {
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 4px 4px 16px;
  transition: border var(--transition), box-shadow var(--transition), background var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.search-box:focus-within {
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px var(--accent-glow), 0 0 24px var(--accent-glow);
  background: var(--surface-2);
}

.search-box input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 0.9rem;
  width: 160px;
  font-family: inherit;
  transition: width var(--transition);
}

.search-box input::placeholder {
  color: var(--text-secondary);
  opacity: 0.8;
}

.search-box input:focus {
  width: 200px;
}

.search-box button {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  border: none;
  border-radius: 999px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: #fff;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  flex-shrink: 0;
}

.search-box button:hover {
  transform: scale(1.08);
  box-shadow: 0 0 20px var(--accent-glow);
  filter: brightness(1.1);
}

.search-box button:active {
  transform: scale(0.95);
}

/* 主题切换 & 菜单按钮 */
.theme-toggle,
.menu-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  cursor: pointer;
  color: var(--text);
  transition: background var(--transition), border var(--transition), transform var(--transition), box-shadow var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  flex-shrink: 0;
}

.theme-toggle:hover,
.menu-toggle:hover {
  border-color: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px var(--accent-glow);
  background: var(--surface-2);
}

.theme-toggle:active,
.menu-toggle:active {
  transform: translateY(0) scale(0.95);
}

.theme-toggle svg,
.menu-toggle svg {
  transition: transform var(--transition);
}

.theme-toggle:hover svg {
  transform: rotate(20deg);
}

.menu-toggle {
  display: none;
}

/* 移动菜单 */
.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 0 20px;
  border-top: 1px solid var(--border);
  animation: slideDown 0.3s ease;
}

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

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  transition: background var(--transition), color var(--transition), padding-left var(--transition);
}

.mobile-menu a:hover {
  background: var(--surface-2);
  color: var(--text);
  padding-left: 24px;
}

/* ==========================================================================
   面包屑
   ========================================================================== */
.breadcrumb {
  padding: 20px 0 4px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  align-items: center;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li::after {
  content: "›";
  color: var(--text-secondary);
  opacity: 0.6;
}

.breadcrumb li:last-child::after {
  content: "";
}

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

.breadcrumb a:hover {
  color: var(--accent-2);
}

/* ==========================================================================
   Hero 区域
   ========================================================================== */
.hero {
  padding: 40px 0 20px;
  position: relative;
}

/* 首屏关键信息 */
.hero-intro {
  padding: 32px 0 8px;
  max-width: 900px;
}

.hero-intro h1 {
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  line-height: 1.22;
  margin-bottom: 20px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-intro h1 span {
  background: linear-gradient(120deg, var(--accent-2), var(--accent), var(--accent-3));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}

.hero-intro p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 14px;
  line-height: 1.8;
}

.hero-intro strong {
  color: var(--accent-2);
  font-weight: 700;
}

/* ==========================================================================
   Banner 轮播 - 渐变毛玻璃
   ========================================================================== */
.carousel {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow), var(--shadow-glow);
  transition: box-shadow var(--transition);
}

.carousel:hover {
  box-shadow: var(--shadow), 0 0 60px var(--accent-glow);
}

.carousel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(77, 158, 255, 0.08), transparent 40%, rgba(255, 77, 109, 0.08));
  pointer-events: none;
  z-index: 1;
}

.carousel-track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
  z-index: 2;
}

.carousel-slide {
  min-width: 100%;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  padding: 44px;
  align-items: center;
}

.carousel-slide h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.28;
  margin-bottom: 16px;
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.carousel-slide p {
  color: var(--text-secondary);
  margin-bottom: 22px;
  font-size: 1rem;
  line-height: 1.75;
}

.carousel-slide svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  filter: drop-shadow(0 8px 24px rgba(77, 158, 255, 0.2));
  transition: transform var(--transition), filter var(--transition);
}

.carousel-slide:hover svg {
  transform: scale(1.03);
  filter: drop-shadow(0 12px 32px rgba(77, 158, 255, 0.35));
}

/* 轮播按钮 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  color: #fff;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.carousel-btn:hover {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 24px var(--accent-glow);
  border-color: transparent;
}

.carousel-btn:active {
  transform: translateY(-50%) scale(0.95);
}

.carousel-btn.prev {
  left: 16px;
}

.carousel-btn.next {
  right: 16px;
}

/* 轮播指示点 */
.carousel-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.carousel-dots button {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  border: none;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), width var(--transition);
  padding: 0;
}

.carousel-dots button:hover {
  background: rgba(255, 255, 255, 0.6);
}

.carousel-dots button.active {
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  width: 28px;
  transform: scale(1);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ==========================================================================
   数字动画区域
   ========================================================================== */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 18px;
  margin: 40px 0 20px;
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 26px 18px;
  text-align: center;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent), var(--accent-3));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.stat-card:hover::before {
  transform: scaleX(1);
}

.stat-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 30px var(--accent-glow);
  background: var(--surface-2);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 8px;
  font-weight: 500;
}

/* ==========================================================================
   内容区块
   ========================================================================== */
section {
  padding: 56px 0;
  scroll-margin-top: 90px;
  position: relative;
}

.section-header {
  margin-bottom: 36px;
  max-width: 800px;
}

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: 12px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 48px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  transition: width var(--transition);
}

.section-header:hover h2::after {
  width: 100%;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 720px;
  font-size: 1rem;
  line-height: 1.8;
  margin-top: 8px;
}

/* ==========================================================================
   卡片网格
   ========================================================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 22px;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 28px;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(77, 158, 255, 0.06), transparent 50%, rgba(255, 77, 109, 0.06));
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35), 0 0 30px var(--accent-glow);
  background: var(--surface-2);
}

.card h3 {
  font-size: 1.18rem;
  margin-bottom: 12px;
  color: var(--text);
  font-weight: 700;
  position: relative;
  z-index: 1;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  position: relative;
  z-index: 1;
}

.card svg {
  width: 52px;
  height: 52px;
  margin-bottom: 18px;
  border-radius: 14px;
  transition: transform var(--transition), filter var(--transition);
}

.card:hover svg {
  transform: scale(1.08) rotate(-3deg);
  filter: drop-shadow(0 0 16px var(--accent-glow));
}

/* ==========================================================================
   文章列表
   ========================================================================== */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
}

.article-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.article-card:hover::before {
  transform: scaleY(1);
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-light);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35), 0 0 30px var(--accent-glow);
  background: var(--surface-2);
}

.article-card .meta {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.article-card .meta span:first-child {
  color: var(--accent-2);
  font-weight: 600;
}

.article-card .meta span:last-child {
  background: var(--surface-2);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid var(--border);
}

.article-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.5;
  color: var(--text);
  font-weight: 700;
  transition: color var(--transition-fast);
}

.article-card:hover h3 {
  color: var(--accent-2);
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  flex: 1;
  line-height: 1.75;
}

.read-more {
  margin-top: 16px;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-2);
  transition: gap var(--transition), color var(--transition-fast);
  width: fit-content;
}

.read-more:hover {
  gap: 12px;
  color: var(--accent);
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 900px;
}

.faq-item {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border var(--transition), box-shadow var(--transition), background var(--transition);
}

.faq-item:hover {
  border-color: var(--border-light);
  box-shadow: 0 0 24px var(--accent-glow);
}

.faq-item.open {
  border-color: var(--border-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 24px var(--accent-glow);
  background: var(--surface-2);
}

.faq-question {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: inherit;
  transition: background var(--transition), color var(--transition-fast);
  line-height: 1.5;
}

.faq-question:hover {
  background: var(--surface-2);
  color: var(--accent-2);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition), color var(--transition-fast);
  color: var(--accent-2);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.22, 1, 0.36, 1), padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 22px;
}

/* ==========================================================================
   HowTo 步骤
   ========================================================================== */
.howto-steps {
  display: grid;
  gap: 18px;
  max-width: 900px;
}

.step {
  display: flex;
  gap: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 24px;
  transition: border var(--transition), transform var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.step::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

.step:hover::before {
  transform: scaleY(1);
}

.step:hover {
  border-color: var(--border-light);
  transform: translateX(6px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 24px var(--accent-glow);
  background: var(--surface-2);
}

.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #fff;
  font-size: 1.05rem;
  box-shadow: 0 4px 16px var(--accent-glow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.step:hover .step-num {
  transform: scale(1.1) rotate(-6deg);
  box-shadow: 0 6px 24px var(--accent-glow), 0 0 40px var(--accent-2-glow);
}

.step h3 {
  font-size: 1.08rem;
  margin-bottom: 8px;
  color: var(--text);
  font-weight: 700;
}

.step p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.75;
}

/* ==========================================================================
   团队 / 作者
   ========================================================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.team-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 28px 22px;
  text-align: center;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}

.team-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(77, 158, 255, 0.08));
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

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

.team-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-light);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35), 0 0 30px var(--accent-glow);
  background: var(--surface-2);
}

.team-card svg {
  width: 76px;
  height: 76px;
  margin: 0 auto 16px;
  transition: transform var(--transition), filter var(--transition);
}

.team-card:hover svg {
  transform: scale(1.08);
  filter: drop-shadow(0 0 20px var(--accent-glow));
}

.team-card h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 700;
}

.team-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ==========================================================================
   联系信息
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.contact-item {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: transform var(--transition), border var(--transition), box-shadow var(--transition), background var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-light);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3), 0 0 24px var(--accent-glow);
  background: var(--surface-2);
}

.contact-item svg {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  color: var(--accent-2);
  transition: transform var(--transition), color var(--transition-fast);
}

.contact-item:hover svg {
  transform: scale(1.15) rotate(-5deg);
  color: var(--accent);
}

.contact-item h3 {
  font-size: 0.98rem;
  margin-bottom: 6px;
  color: var(--text);
  font-weight: 700;
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.65;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  border-top: 1px solid var(--glass-border);
  padding: 56px 0 28px;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-2), var(--accent), transparent);
  opacity: 0.6;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 36px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1.02rem;
  margin-bottom: 16px;
  color: var(--text);
  font-weight: 700;
  position: relative;
  display: inline-block;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 24px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast), padding-left var(--transition);
  display: inline-block;
  position: relative;
}

.footer-col a:hover {
  color: var(--accent-2);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.7;
}

.footer-bottom a {
  color: var(--text-secondary);
}

.footer-bottom a:hover {
  color: var(--accent-2);
}

/* ==========================================================================
   返回顶部
   ========================================================================== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  color: #fff;
  border: none;
  display: grid;
  place-items: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.9);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  z-index: 900;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 24px var(--accent-glow);
}

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

.back-to-top:hover {
  transform: translateY(-6px) scale(1.08);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 40px var(--accent-glow);
}

.back-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

/* ==========================================================================
   滚动动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

/* 交错动画延迟 */
.reveal.visible .card:nth-child(1),
.reveal.visible .article-card:nth-child(1),
.reveal.visible .step:nth-child(1),
.reveal.visible .team-card:nth-child(1),
.reveal.visible .contact-item:nth-child(1),
.reveal.visible .stat-card:nth-child(1) {
  transition-delay: 0.05s;
}

.reveal.visible .card:nth-child(2),
.reveal.visible .article-card:nth-child(2),
.reveal.visible .step:nth-child(2),
.reveal.visible .team-card:nth-child(2),
.reveal.visible .contact-item:nth-child(2),
.reveal.visible .stat-card:nth-child(2) {
  transition-delay: 0.1s;
}

.reveal.visible .card:nth-child(3),
.reveal.visible .article-card:nth-child(3),
.reveal.visible .step:nth-child(3),
.reveal.visible .team-card:nth-child(3),
.reveal.visible .contact-item:nth-child(3),
.reveal.visible .stat-card:nth-child(3) {
  transition-delay: 0.15s;
}

.reveal.visible .card:nth-child(4),
.reveal.visible .article-card:nth-child(4),
.reveal.visible .step:nth-child(4),
.reveal.visible .team-card:nth-child(4),
.reveal.visible .contact-item:nth-child(4),
.reveal.visible .stat-card:nth-child(4) {
  transition-delay: 0.2s;
}

/* ==========================================================================
   响应式布局
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {
  .carousel-slide {
    padding: 36px;
    gap: 24px;
  }

  .search-box input {
    width: 130px;
  }

  .search-box input:focus {
    width: 160px;
  }
}

/* 小屏平板 / 大屏手机 */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .menu-toggle {
    display: grid;
  }

  .carousel-slide {
    grid-template-columns: 1fr;
    padding: 32px 28px;
    text-align: center;
  }

  .carousel-slide svg {
    max-width: 340px;
    margin: 0 auto;
  }

  .carousel-slide .read-more {
    justify-content: center;
  }

  .hero-intro {
    text-align: left;
  }

  section {
    padding: 44px 0;
  }
}

/* 手机 */
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 0;
  }

  .logo {
    font-size: 1rem;
  }

  .logo svg {
    width: 32px;
    height: 32px;
  }

  .search-box {
    order: 3;
    width: 100%;
    padding: 6px 6px 6px 16px;
  }

  .search-box input {
    width: 100%;
    flex: 1;
  }

  .search-box input:focus {
    width: 100%;
  }

  .header-actions {
    gap: 8px;
  }

  .theme-toggle,
  .menu-toggle {
    width: 38px;
    height: 38px;
  }

  .carousel-slide {
    padding: 26px 20px;
    gap: 20px;
  }

  .carousel-slide h2 {
    font-size: 1.4rem;
  }

  .carousel-slide p {
    font-size: 0.92rem;
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
  }

  .carousel-btn.prev {
    left: 8px;
  }

  .carousel-btn.next {
    right: 8px;
  }

  .carousel-dots {
    bottom: 12px;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-card {
    padding: 20px 12px;
  }

  .stat-number {
    font-size: 1.7rem;
  }

  .stat-label {
    font-size: 0.8rem;
  }

  .card-grid,
  .article-list,
  .team-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .card,
  .article-card,
  .step,
  .team-card,
  .contact-item {
    padding: 20px;
  }

  .step {
    gap: 14px;
  }

  .step-num {
    width: 38px;
    height: 38px;
    font-size: 0.95rem;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-answer {
    padding: 0 18px;
    font-size: 0.9rem;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .back-to-top {
    bottom: 18px;
    right: 18px;
    width: 44px;
    height: 44px;
  }

  .section-header h2 {
    font-size: 1.4rem;
  }

  .hero-intro h1 {
    font-size: 1.6rem;
  }

  .hero-intro p {
    font-size: 0.95rem;
  }
}

/* 超小屏 */
@media (max-width: 380px) {
  .stats {
    grid-template-columns: 1fr;
  }

  .logo span {
    display: none;
  }

  .carousel-slide h2 {
    font-size: 1.25rem;
  }
}

/* ==========================================================================
   无障碍与动效偏好
   ========================================================================== */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 4px;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}

/* 打印样式 */
@media print {
  .site-header,
  .back-to-top,
  .carousel-btn,
  .carousel-dots,
  .search-box,
  .theme-toggle,
  .menu-toggle {
    display: none !important;
  }

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

  .card,
  .article-card,
  .step,
  .faq-item {
    border: 1px solid #ccc;
    box-shadow: none;
    background: #fff;
  }
}
```