```css
/* ============================================================
   黄果视频 - 完整样式表
   风格：现代影视流媒体 · 深色影院质感 · 渐变毛玻璃
   支持：PC / 平板 / 手机 · 暗色模式 · 滚动动画 · hover动画
   ============================================================ */

/* ---------- 全局重置与基础样式 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* 品牌色 */
  --brand-primary: #1a2a3a;
  --brand-secondary: #e8b14c;
  --brand-secondary-dark: #d4941e;
  --brand-accent: #c0392b;
  --brand-accent-light: #e74c3c;

  /* 浅色主题 */
  --bg-body: #f4f6fb;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f8f9fc;
  --bg-elevated: #ffffff;
  --text-primary: #1a2a3a;
  --text-secondary: #4e5e6e;
  --text-muted: #6c7a8a;
  --border-color: #e2e8f0;
  --border-light: #e8eef4;

  /* 暗色主题 */
  --dark-bg: #0f1a24;
  --dark-surface: #1e2c3a;
  --dark-surface-2: #16222e;
  --dark-border: #2e4052;
  --dark-text: #eef3f7;
  --dark-text-muted: #9aaab8;

  /* 渐变 */
  --gradient-brand: linear-gradient(135deg, #e8b14c 0%, #d4941e 100%);
  --gradient-hero-light: linear-gradient(135deg, #eef4fc 0%, #e2ecf8 45%, #dce8f6 100%);
  --gradient-hero-dark: linear-gradient(135deg, #0f1a24 0%, #162534 50%, #1e2c3a 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(248,250,252,0.7));
  --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.55), rgba(255,255,255,0.25));

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(26, 42, 58, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 42, 58, 0.10);
  --shadow-lg: 0 16px 40px rgba(26, 42, 58, 0.14);
  --shadow-glow: 0 8px 28px rgba(232, 177, 76, 0.35);

  /* 圆角 */
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --radius-xl: 40px;
  --radius-pill: 999px;

  /* 字体 */
  --font-sans: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;

  /* 过渡 */
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-base), color var(--transition-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 暗色模式基础 */
body.dark-mode {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

/* 链接 */
a {
  color: #1a5f9e;
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--brand-accent);
  text-decoration: underline;
}

body.dark-mode a {
  color: var(--brand-secondary);
}

body.dark-mode a:hover {
  color: #f5c96a;
}

/* 媒体元素 */
img,
svg,
video {
  max-width: 100%;
  display: block;
}

/* 选中高亮 */
::selection {
  background-color: rgba(232, 177, 76, 0.35);
  color: var(--brand-primary);
}

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

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(108, 122, 138, 0.35);
  border-radius: var(--radius-pill);
  border: 2px solid transparent;
  background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(108, 122, 138, 0.6);
  background-clip: content-box;
}

body.dark-mode ::-webkit-scrollbar-thumb {
  background: rgba(154, 170, 184, 0.3);
  background-clip: content-box;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 头部导航（毛玻璃） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset, var(--shadow-sm);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

body.dark-mode .site-header {
  background: rgba(30, 44, 58, 0.78);
  border-bottom-color: rgba(46, 64, 82, 0.8);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 4px 20px rgba(0, 0, 0, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 18px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 22px;
  color: var(--brand-primary);
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.brand-logo::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.5), transparent 55%);
  opacity: 0.6;
}

.brand:hover .brand-logo {
  transform: rotate(-6deg) scale(1.06);
  box-shadow: 0 10px 30px rgba(232, 177, 76, 0.5);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--brand-primary);
  letter-spacing: -0.5px;
  transition: color var(--transition-base);
}

body.dark-mode .brand-name {
  color: var(--dark-text);
}

.brand-subtitle {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.4px;
  transition: color var(--transition-base);
}

body.dark-mode .brand-subtitle {
  color: var(--dark-text-muted);
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: #2d3e4f;
  white-space: nowrap;
  padding: 8px 2px;
  position: relative;
  border-bottom: 2px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--gradient-brand);
  border-radius: var(--radius-pill);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.nav-link:hover {
  border-bottom-color: transparent;
  color: var(--brand-accent);
  text-decoration: none;
}

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

body.dark-mode .nav-link {
  color: #cbd5e1;
}

body.dark-mode .nav-link:hover {
  color: var(--brand-secondary);
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

/* 搜索框 */
.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input {
  padding: 9px 18px 9px 38px;
  border-radius: var(--radius-pill);
  border: 1px solid #d0dae4;
  background-color: rgba(248, 250, 252, 0.9);
  font-size: 0.9rem;
  width: 180px;
  color: var(--text-primary);
  transition: width var(--transition-base), border-color var(--transition-fast), background-color var(--transition-base), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.search-input:focus {
  outline: none;
  border-color: var(--brand-secondary);
  width: 230px;
  background-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(232, 177, 76, 0.15);
}

.search-input::placeholder {
  color: #8a9aa8;
}

.search-icon {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  color: #8a9aa8;
  pointer-events: none;
  transition: color var(--transition-fast);
}

.search-input:focus ~ .search-icon,
.search-wrapper:focus-within .search-icon {
  color: var(--brand-secondary-dark);
}

body.dark-mode .search-input {
  background-color: rgba(26, 42, 58, 0.85);
  border-color: var(--dark-border);
  color: var(--dark-text);
}

body.dark-mode .search-input:focus {
  background-color: #1a2a3a;
  border-color: var(--brand-secondary);
}

body.dark-mode .search-input::placeholder {
  color: #6c7a8a;
}

/* 主题切换按钮 */
.theme-toggle {
  background: rgba(238, 242, 246, 0.9);
  border: none;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.15rem;
  color: #2d3e4f;
  transition: background-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.theme-toggle:hover {
  background-color: #e0e7ef;
  transform: rotate(20deg) scale(1.05);
  box-shadow: var(--shadow-sm);
}

.theme-toggle:active {
  transform: scale(0.94);
}

body.dark-mode .theme-toggle {
  background-color: var(--dark-border);
  color: #f0e6d2;
}

body.dark-mode .theme-toggle:hover {
  background-color: #3a4f63;
}

/* 移动菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.7rem;
  line-height: 1;
  cursor: pointer;
  color: var(--brand-primary);
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-fast);
}

.mobile-menu-btn:hover {
  background-color: rgba(232, 177, 76, 0.12);
}

body.dark-mode .mobile-menu-btn {
  color: var(--dark-text);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 18px 0 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-base);
}

.breadcrumb a {
  color: #1a5f9e;
  position: relative;
}

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

.breadcrumb span {
  color: var(--text-muted);
}

body.dark-mode .breadcrumb {
  color: var(--dark-text-muted);
}

body.dark-mode .breadcrumb a {
  color: var(--brand-secondary);
}

/* ---------- 英雄区（渐变 Banner） ---------- */
.hero-section {
  position: relative;
  background: var(--gradient-hero-light);
  padding: 56px 0 64px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin-bottom: 36px;
  overflow: hidden;
  transition: background var(--transition-slow);
}

/* 装饰光斑 */
.hero-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 177, 76, 0.28), transparent 70%);
  pointer-events: none;
  filter: blur(10px);
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -140px;
  left: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(192, 57, 43, 0.14), transparent 70%);
  pointer-events: none;
  filter: blur(10px);
}

body.dark-mode .hero-section {
  background: var(--gradient-hero-dark);
}

body.dark-mode .hero-section::before {
  background: radial-gradient(circle, rgba(232, 177, 76, 0.18), transparent 70%);
}

body.dark-mode .hero-section::after {
  background: radial-gradient(circle, rgba(192, 57, 43, 0.12), transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 52px;
  flex-wrap: wrap;
}

.hero-content {
  flex: 1 1 520px;
  min-width: 0;
}

.hero-title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--brand-primary);
  margin-bottom: 18px;
  letter-spacing: -0.6px;
  transition: color var(--transition-base);
}

.hero-title .highlight {
  color: var(--brand-accent);
  background: linear-gradient(180deg, transparent 62%, rgba(252, 232, 178, 0.85) 62%);
  padding: 0 4px;
  border-radius: 4px;
}

body.dark-mode .hero-title {
  color: #f0f4f8;
}

body.dark-mode .hero-title .highlight {
  background: linear-gradient(180deg, transparent 62%, rgba(232, 177, 76, 0.35) 62%);
  color: var(--brand-secondary);
}

.hero-subtitle {
  font-size: 1.12rem;
  color: #3e4e5e;
  margin-bottom: 28px;
  max-width: 640px;
  line-height: 1.8;
  transition: color var(--transition-base);
}

body.dark-mode .hero-subtitle {
  color: #b0c0ce;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 30px;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  gap: 6px;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-base), background-color var(--transition-base), color var(--transition-base);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255,255,255,0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s ease;
}

.btn:hover::before {
  left: 140%;
}

.btn-primary {
  background: var(--gradient-brand);
  color: var(--brand-primary);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(232, 177, 76, 0.5);
  text-decoration: none;
  color: var(--brand-primary);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--brand-primary);
  color: var(--brand-primary);
}

.btn-outline:hover {
  background: var(--brand-primary);
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

body.dark-mode .btn-outline {
  border-color: var(--brand-secondary);
  color: var(--brand-secondary);
}

body.dark-mode .btn-outline:hover {
  background: var(--brand-secondary);
  color: var(--brand-primary);
}

/* 英雄区统计 */
.hero-stats {
  display: flex;
  gap: 44px;
  margin-top: 36px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: left;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -22px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 38px;
  background: rgba(108, 122, 138, 0.25);
}

.stat-number {
  font-size: 2.05rem;
  font-weight: 800;
  color: var(--brand-accent);
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.5px;
  transition: color var(--transition-base);
}

body.dark-mode .stat-number {
  color: var(--brand-secondary);
}

.stat-label {
  font-size: 0.85rem;
  color: #5a6a7a;
  font-weight: 500;
  transition: color var(--transition-base);
}

body.dark-mode .stat-label {
  color: #b0c0ce;
}

/* ---------- 轮播 ---------- */
.carousel-section {
  margin-bottom: 52px;
}

.carousel-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--brand-primary);
}

.carousel-track {
  display: flex;
  transition: transform var(--transition-slow);
  will-change: transform;
}

.carousel-slide {
  min-width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 52px 40px;
  background: linear-gradient(135deg, #1a2a3a 0%, #2d4052 100%);
  color: #ffffff;
  min-height: 240px;
  overflow: hidden;
}

.carousel-slide::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 177, 76, 0.22), transparent 70%);
  pointer-events: none;
}

.carousel-slide:nth-child(2) {
  background: linear-gradient(135deg, #2d1f1a 0%, #4a2e1e 100%);
}

.carousel-slide:nth-child(3) {
  background: linear-gradient(135deg, #1a2a3a 0%, #1e3a4a 100%);
}

.carousel-content {
  text-align: center;
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.carousel-title {
  font-size: 1.85rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: #f5e6c8;
  letter-spacing: -0.3px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
}

.carousel-desc {
  font-size: 1rem;
  opacity: 0.88;
  color: #d8e2ec;
  line-height: 1.75;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.16);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  color: #ffffff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
  z-index: 10;
}

.carousel-btn:hover {
  background: rgba(255, 255, 255, 0.32);
  transform: translateY(-50%) scale(1.08);
}

.carousel-btn:active {
  transform: translateY(-50%) scale(0.96);
}

.carousel-btn.prev {
  left: 18px;
}

.carousel-btn.next {
  right: 18px;
}

.carousel-dots {
  position: absolute;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 9px;
  z-index: 10;
}

.carousel-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast), width var(--transition-fast);
}

.carousel-dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

.carousel-dot.active {
  background: var(--brand-secondary);
  width: 26px;
  border-radius: var(--radius-pill);
  transform: none;
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 52px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 44px;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--brand-primary);
  margin-bottom: 10px;
  letter-spacing: -0.4px;
  transition: color var(--transition-base);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  margin: 14px auto 0;
  border-radius: var(--radius-pill);
  background: var(--gradient-brand);
}

body.dark-mode .section-title {
  color: #f0f4f8;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto;
  line-height: 1.75;
  transition: color var(--transition-base);
}

body.dark-mode .section-subtitle {
  color: var(--dark-text-muted);
}

/* 网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 32px;
}

/* ---------- 卡片（毛玻璃 + 圆角） ---------- */
.feature-card {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(232, 177, 76, 0.35);
}

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

body.dark-mode .feature-card {
  background: var(--dark-surface);
  color: var(--dark-text);
  border-color: var(--dark-border);
}

body.dark-mode .feature-card:hover {
  border-color: rgba(232, 177, 76, 0.45);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 15px;
  background: linear-gradient(135deg, #fdf6e8, #fbeccd);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--brand-secondary-dark);
  transition: transform var(--transition-base), background var(--transition-base);
}

.feature-card:hover .feature-icon {
  transform: scale(1.08) rotate(-4deg);
  background: var(--gradient-brand);
  color: var(--brand-primary);
}

body.dark-mode .feature-icon {
  background: linear-gradient(135deg, rgba(232, 177, 76, 0.16), rgba(232, 177, 76, 0.06));
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--brand-primary);
  transition: color var(--transition-base);
  line-height: 1.4;
}

body.dark-mode .feature-title {
  color: #f0f4f8;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  transition: color var(--transition-base);
}

body.dark-mode .feature-desc {
  color: #b0c0ce;
}

/* ---------- 文章列表 ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 26px;
}

.article-card {
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(232, 177, 76, 0.3);
}

body.dark-mode .article-card {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

body.dark-mode .article-card:hover {
  border-color: rgba(232, 177, 76, 0.4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.article-thumb {
  height: 160px;
  background: linear-gradient(135deg, #e8eef8, #d0dae8);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #5a6a7a;
  font-size: 2.6rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-slow);
}

.article-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(26, 42, 58, 0.12));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.article-card:hover .article-thumb {
  transform: scale(1.04);
}

.article-card:hover .article-thumb::after {
  opacity: 1;
}

body.dark-mode .article-thumb {
  background: linear-gradient(135deg, #22313f, #1a2734);
  color: #7a8a9a;
}

.article-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  transition: color var(--transition-base);
}

.article-meta span {
  position: relative;
}

.article-meta span:not(:last-child)::after {
  content: '·';
  position: absolute;
  right: -8px;
  color: var(--text-muted);
}

body.dark-mode .article-meta {
  color: var(--dark-text-muted);
}

.article-title {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.45;
  color: var(--brand-primary);
  transition: color var(--transition-base);
}

.article-title a {
  color: inherit;
  position: relative;
  background-image: linear-gradient(var(--brand-secondary), var(--brand-secondary));
  background-size: 0% 2px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  transition: background-size var(--transition-base), color var(--transition-fast);
}

.article-title a:hover {
  color: var(--brand-accent);
  text-decoration: none;
  background-size: 100% 2px;
}

body.dark-mode .article-title {
  color: #eef3f7;
}

body.dark-mode .article-title a:hover {
  color: var(--brand-secondary);
}

.article-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
  transition: color var(--transition-base);
}

body.dark-mode .article-summary {
  color: #b0c0ce;
}

.read-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-secondary-dark);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  align-self: flex-start;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.read-more:hover {
  color: var(--brand-accent);
  text-decoration: none;
  gap: 9px;
}

body.dark-mode .read-more {
  color: var(--brand-secondary);
}

body.dark-mode .read-more:hover {
  color: #f5c96a;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-base), transform var(--transition-base);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(232, 177, 76, 0.4);
}

.faq-item.open {
  border-color: rgba(232, 177, 76, 0.55);
  box-shadow: var(--shadow-md);
}

body.dark-mode .faq-item {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

body.dark-mode .faq-item.open {
  border-color: rgba(232, 177, 76, 0.5);
}

.faq-question {
  padding: 19px 24px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  color: var(--brand-primary);
  user-select: none;
  transition: color var(--transition-base), background-color var(--transition-fast);
}

.faq-question:hover {
  background-color: rgba(232, 177, 76, 0.06);
}

.faq-question span {
  flex: 1;
  transition: color var(--transition-base);
}

body.dark-mode .faq-question {
  color: #f0f4f8;
}

body.dark-mode .faq-question:hover {
  background-color: rgba(232, 177, 76, 0.08);
}

.faq-icon {
  font-size: 1.4rem;
  line-height: 1;
  color: var(--brand-secondary-dark);
  transition: transform var(--transition-base), color var(--transition-base);
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(232, 177, 76, 0.12);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--gradient-brand);
  color: var(--brand-primary);
}

.faq-answer {
  padding: 0 24px 22px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
  display: none;
  animation: faqFadeIn 0.35s ease;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

body.dark-mode .faq-answer {
  color: #b0c0ce;
}

/* ---------- HowTo 教程 ---------- */
.howto-steps {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.howto-step {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 26px 30px;
  border-left: 5px solid var(--brand-secondary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.howto-step:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

body.dark-mode .howto-step {
  background: var(--dark-surface);
  border-left-color: var(--brand-secondary);
}

.howto-step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: color var(--transition-base);
}

body.dark-mode .howto-step-title {
  color: #f0f4f8;
}

.howto-step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--gradient-brand);
  color: var(--brand-primary);
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(232, 177, 76, 0.35);
}

.howto-step-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  transition: color var(--transition-base);
}

body.dark-mode .howto-step-desc {
  color: #b0c0ce;
}

/* ---------- 联系 ---------- */
.contact-section {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

body.dark-mode .contact-section {
  background: var(--dark-surface);
  border-color: var(--dark-border);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}

.contact-item {
  text-align: center;
  padding: 18px 12px;
  border-radius: var(--radius-md);
  transition: transform var(--transition-base), background-color var(--transition-base);
}

.contact-item:hover {
  transform: translateY(-4px);
  background-color: rgba(232, 177, 76, 0.06);
}

body.dark-mode .contact-item:hover {
  background-color: rgba(232, 177, 76, 0.08);
}

.contact-item svg {
  margin: 0 auto 14px;
  color: var(--brand-secondary-dark);
  transition: transform var(--transition-base), color var(--transition-base);
}

.contact-item:hover svg {
  transform: scale(1.12);
  color: var(--brand-accent);
}

body.dark-mode .contact-item svg {
  color: var(--brand-secondary);
}

.contact-item strong {
  display: block;
  font-size: 0.98rem;
  margin-bottom: 6px;
  color: var(--brand-primary);
  transition: color var(--transition-base);
}

body.dark-mode .contact-item strong {
  color: #f0f4f8;
}

.contact-item span {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition-base);
  word-break: break-word;
}

body.dark-mode .contact-item span {
  color: #b0c0ce;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: linear-gradient(180deg, #1a2a3a 0%, #14212e 100%);
  color: #cbd5e1;
  padding: 52px 0 26px;
  margin-top: 56px;
  border-top: 1px solid #2e4052;
  position: relative;
  overflow: hidden;
}

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

body.dark-mode .site-footer {
  background: linear-gradient(180deg, #0b141c 0%, #0f1a24 100%);
  border-top-color: #1e2c3a;
}

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

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #f0e6d2;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}

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

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-link {
  color: #9aaab8;
  font-size: 0.88rem;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  position: relative;
  display: inline-block;
}

.footer-link:hover {
  color: var(--brand-secondary);
  text-decoration: none;
  padding-left: 6px;
}

body.dark-mode .footer-link {
  color: var(--dark-text-muted);
}

body.dark-mode .footer-link:hover {
  color: var(--brand-secondary);
}

.footer-bottom {
  border-top: 1px solid #2e4052;
  padding-top: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: #6c7a8a;
}

.copyright {
  color: #6c7a8a;
  transition: color var(--transition-base);
}

body.dark-mode .copyright {
  color: #6c7a8a;
}

.footer-legal {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}

/* ---------- 返回顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 34px;
  right: 34px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--brand-primary);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  font-size: 1.4rem;
  line-height: 1;
  transition: background-color var(--transition-base), transform var(--transition-fast), box-shadow var(--transition-base);
}

.back-to-top:hover {
  background: var(--brand-secondary-dark);
  transform: translateY(-4px);
  box-shadow: 0 16px 36px rgba(212, 148, 30, 0.45);
}

.back-to-top:active {
  transform: translateY(-1px) scale(0.96);
}

.back-to-top.visible {
  display: flex;
  animation: backToTopIn 0.35s ease;
}

@keyframes backToTopIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

body.dark-mode .back-to-top {
  background: var(--brand-secondary);
  color: var(--brand-primary);
}

body.dark-mode .back-to-top:hover {
  background: #f5c96a;
}

/* ---------- 滚动动画 ---------- */
.fade-in-up {
  opacity: 0;
  transform: translateY(28px);
  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;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in-up {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式：平板 ---------- */
@media (max-width: 1024px) {
  .hero-inner {
    gap: 36px;
  }

  .hero-stats {
    gap: 32px;
  }

  .stat-item:not(:last-child)::after {
    right: -16px;
  }

  .nav-menu {
    gap: 20px;
  }

  .search-input {
    width: 150px;
  }

  .search-input:focus {
    width: 190px;
  }
}

/* ---------- 响应式：移动端菜单 ---------- */
@media (max-width: 960px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    padding: 22px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: 999;
  }

  .nav-menu.open {
    display: flex;
    animation: menuSlideIn 0.3s ease;
  }

  @keyframes menuSlideIn {
    from {
      opacity: 0;
      transform: translateY(-12px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  body.dark-mode .nav-menu {
    background: rgba(30, 44, 58, 0.97);
    border-bottom-color: var(--dark-border);
  }

  .nav-link {
    width: 100%;
    padding: 10px 0;
    font-size: 1rem;
    border-bottom: 1px solid transparent;
  }

  .nav-link:hover::after {
    width: 40px;
  }

  .mobile-menu-btn {
    display: block;
  }

  .search-input {
    width: 140px;
  }

  .search-input:focus {
    width: 180px;
  }

  .hero-section {
    padding: 44px 0 52px;
  }

  .hero-inner {
    gap: 28px;
  }

  .hero-stats {
    gap: 28px;
    margin-top: 28px;
  }

  .carousel-slide {
    padding: 44px 32px;
    min-height: 220px;
  }

  .carousel-title {
    font-size: 1.6rem;
  }

  .section {
    padding: 44px 0;
  }

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

/* ---------- 响应式：小屏手机 ---------- */
@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .header-inner {
    height: 62px;
    gap: 10px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
    font-size: 19px;
    border-radius: 11px;
  }

  .brand-name {
    font-size: 1.08rem;
  }

  .brand-subtitle {
    font-size: 0.58rem;
  }

  .search-wrapper {
    display: none;
  }

  .theme-toggle {
    width: 38px;
    height: 38px;
    font-size: 1.05rem;
  }

  .mobile-menu-btn {
    font-size: 1.5rem;
  }

  .nav-menu {
    top: 62px;
  }

  .breadcrumb {
    font-size: 0.78rem;
    padding: 14px 0 6px;
  }

  .hero-section {
    padding: 34px 0 40px;
    border-radius: 0 0 28px 28px;
    margin-bottom: 28px;
  }

  .hero-title {
    font-size: 1.55rem;
    margin-bottom: 14px;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    margin-bottom: 22px;
  }

  .btn {
    padding: 11px 22px;
    font-size: 0.88rem;
    flex: 1 1 auto;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-stats {
    gap: 20px;
    margin-top: 24px;
  }

  .stat-item:not(:last-child)::after {
    display: none;
  }

  .stat-number {
    font-size: 1.55rem;
  }

  .stat-label {
    font-size: 0.75rem;
  }

  .carousel-slide {
    padding: 30px 20px;
    min-height: 190px;
  }

  .carousel-title {
    font-size: 1.25rem;
  }

  .carousel-desc {
    font-size: 0.85rem;
  }

  .carousel-btn {
    width: 36px;
    height: 36px;
    font-size: 1.15rem;
  }

  .carousel-btn.prev {
    left: 10px;
  }

  .carousel-btn.next {
    right: 10px;
  }

  .section {
    padding: 36px 0;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-subtitle {
    font-size: 0.9rem;
  }

  .section-header {
    margin-bottom: 28px;
  }

  .grid-3,
  .grid-2 {
    gap: 18px;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
  }

  .feature-title {
    font-size: 1.08rem;
  }

  .article-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .article-thumb {
    height: 140px;
  }

  .article-body {
    padding: 18px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.94rem;
  }

  .faq-answer {
    padding: 0 18px 18px;
    font-size: 0.88rem;
  }

  .howto-step {
    padding: 22px 20px;
  }

  .howto-step:hover {
    transform: translateX(3px);
  }

  .howto-step-title {
    font-size: 1rem;
  }

  .howto-step-desc {
    font-size: 0.88rem;
  }

  .contact-section {
    padding: 26px 18px;
    border-radius: var(--radius-md);
  }

  .contact-grid {
    gap: 18px;
  }

  .contact-item {
    padding: 14px 8px;
  }

  .footer-grid {
    gap: 26px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .footer-legal {
    justify-content: center;
    gap: 16px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.25rem;
  }
}

/* ---------- 超小屏 ---------- */
@media (max-width: 380px) {
  .brand-subtitle {
    display: none;
  }

  .hero-title {
    font-size: 1.4rem;
  }

  .btn {
    padding: 10px 18px;
    font-size: 0.84rem;
  }

  .stat-number {
    font-size: 1.35rem;
  }
}

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

  body {
    background: #ffffff;
    color: #000000;
  }

  .feature-card,
  .article-card,
  .faq-item,
  .howto-step {
    box-shadow: none;
    border: 1px solid #cccccc;
    break-inside: avoid;
  }

  a {
    color: #000000;
    text-decoration: underline;
  }
}
```