/* ============================================================
   51视频 - 完全原创样式表
   品牌色：主橙 #FF6B1A  辅蓝 #1A5CFF  深色 #0D1B2A
   ============================================================ */

/* ---------- CSS变量 ---------- */
:root {
  --brand-orange: #FF6B1A;
  --brand-blue: #1A5CFF;
  --brand-dark: #0D1B2A;
  --brand-mid: #1E2D40;
  --brand-light: #F5F7FA;
  --brand-accent: #FFB347;
  --brand-purple: #7B2FBE;
  --text-main: #1A1A2E;
  --text-sub: #5A6478;
  --text-light: #9BA3B2;
  --white: #FFFFFF;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.12);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.18);
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",sans-serif;
  color: var(--text-main);
  background: var(--brand-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---------- 通用工具类 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--brand-dark);
  text-align: center;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}
.section-title span { color: var(--brand-orange); }
.section-sub {
  text-align: center;
  color: var(--text-sub);
  font-size: 1rem;
  margin-bottom: 3rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--brand-orange) 0%, #FF8C42 100%);
  color: var(--white);
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,107,26,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,26,0.45); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--brand-blue);
  border: 2px solid var(--brand-blue);
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-secondary:hover { background: var(--brand-blue); color: var(--white); }
.tag {
  display: inline-block;
  background: rgba(255,107,26,0.1);
  color: var(--brand-orange);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  margin-right: 6px;
  margin-bottom: 4px;
}
.tag-blue { background: rgba(26,92,255,0.1); color: var(--brand-blue); }
.tag-purple { background: rgba(123,47,190,0.1); color: var(--brand-purple); }

/* ---------- 顶部公告栏 ---------- */
.top-notice {
  background: linear-gradient(90deg, var(--brand-dark) 0%, var(--brand-mid) 100%);
  color: rgba(255,255,255,0.85);
  font-size: 0.82rem;
  padding: 7px 0;
  text-align: center;
  letter-spacing: 0.03em;
}
.top-notice a { color: var(--brand-accent); font-weight: 600; }

/* ---------- 导航栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.nav-logo img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
}
.nav-logo-text {
  font-size: 1.4rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-menu a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: var(--transition);
  position: relative;
}
.nav-menu a:hover, .nav-menu a.active {
  color: var(--brand-orange);
  background: rgba(255,107,26,0.08);
}
.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--brand-orange);
  border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-btn-login {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--brand-blue);
  border: 2px solid var(--brand-blue);
  transition: var(--transition);
}
.nav-btn-login:hover { background: var(--brand-blue); color: var(--white); }
.nav-btn-join {
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--brand-orange), #FF8C42);
  color: var(--white);
  transition: var(--transition);
}
.nav-btn-join:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(255,107,26,0.4); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--brand-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---------- 搜索栏 ---------- */
.search-bar-wrap {
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-mid) 100%);
  padding: 14px 0;
}
.search-bar {
  display: flex;
  align-items: center;
  max-width: 680px;
  margin: 0 auto;
  background: rgba(255,255,255,0.1);
  border: 1.5px solid rgba(255,255,255,0.2);
  border-radius: 50px;
  overflow: hidden;
  padding: 0 6px 0 20px;
  transition: var(--transition);
}
.search-bar:focus-within {
  background: rgba(255,255,255,0.15);
  border-color: var(--brand-orange);
  box-shadow: 0 0 0 3px rgba(255,107,26,0.2);
}
.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--white);
  font-size: 0.95rem;
  padding: 10px 0;
  font-family: inherit;
}
.search-bar input::placeholder { color: rgba(255,255,255,0.5); }
.search-bar button {
  background: linear-gradient(135deg, var(--brand-orange), #FF8C42);
  color: var(--white);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 700;
  transition: var(--transition);
}
.search-bar button:hover { opacity: 0.9; }
.search-hot {
  text-align: center;
  margin-top: 8px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
}
.search-hot a {
  color: var(--brand-accent);
  margin: 0 6px;
  transition: var(--transition);
}
.search-hot a:hover { color: var(--white); }

/* ---------- Hero区域 ---------- */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--brand-dark) 0%, #1A2A4A 60%, var(--brand-mid) 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-text h1 {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 1rem;
  letter-spacing: -0.03em;
}
.hero-text h1 em {
  font-style: normal;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-text p {
  color: rgba(255,255,255,0.75);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  line-height: 1.8;
}
.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 2rem;
}
.hero-stat { text-align: center; }
.hero-stat strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--brand-orange);
}
.hero-stat span { font-size: 0.82rem; color: rgba(255,255,255,0.6); }
.hero-image-wrap {
  position: relative;
}
.hero-image-wrap img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
}
.hero-badge {
  position: absolute;
  bottom: -16px;
  left: 20px;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--brand-dark);
}
.hero-badge-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* ---------- 通用Section ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--white); }
.section-dark {
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-mid) 100%);
  color: var(--white);
}
.section-dark .section-title { color: var(--white); }
.section-dark .section-sub { color: rgba(255,255,255,0.6); }

/* ---------- 视频卡片 ---------- */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--brand-dark);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,107,26,0.92);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.85);
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon svg { width: 24px; height: 24px; fill: white; margin-left: 4px; }
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-badge-hot {
  position: absolute;
  top: 8px;
  left: 8px;
  background: linear-gradient(135deg, #FF3B3B, #FF6B1A);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px 16px; }
.video-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-light);
  margin-top: 8px;
}
.video-meta-left { display: flex; align-items: center; gap: 12px; }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-orange);
  background: rgba(255,107,26,0.08);
  padding: 2px 8px;
  border-radius: 4px;
}

/* ---------- 动漫专区 ---------- */
.anime-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.anime-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.anime-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.anime-thumb {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
  background: linear-gradient(135deg, #1A2A4A, #2A3A5A);
}
.anime-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.anime-card:hover .anime-thumb img { transform: scale(1.08); }
.anime-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.anime-card:hover .anime-play-overlay { opacity: 1; }
.anime-info { padding: 12px 14px; }
.anime-info h4 { font-size: 0.88rem; font-weight: 700; margin-bottom: 4px; color: var(--text-main); }
.anime-info p { font-size: 0.75rem; color: var(--text-light); }
.anime-ep {
  position: absolute;
  bottom: 8px;
  left: 8px;
  background: rgba(26,92,255,0.85);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
}

/* ---------- AI赋能区 ---------- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.ai-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: var(--transition);
}
.ai-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--brand-orange);
  transform: translateY(-4px);
}
.ai-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.ai-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.ai-card p { font-size: 0.88rem; color: rgba(255,255,255,0.65); line-height: 1.7; }

/* ---------- 专家展示 ---------- */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.expert-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--brand-orange);
}
.expert-card h3 { font-size: 1.05rem; font-weight: 800; color: var(--brand-dark); margin-bottom: 4px; }
.expert-role {
  font-size: 0.82rem;
  color: var(--brand-orange);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-card p { font-size: 0.85rem; color: var(--text-sub); line-height: 1.6; margin-bottom: 14px; }
.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 16px;
}
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btn {
  padding: 7px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  transition: var(--transition);
}
.expert-btn-primary {
  background: linear-gradient(135deg, var(--brand-orange), #FF8C42);
  color: var(--white);
}
.expert-btn-secondary {
  border: 1.5px solid var(--brand-blue);
  color: var(--brand-blue);
}
.expert-btn-secondary:hover { background: var(--brand-blue); color: var(--white); }

/* ---------- 社区功能 ---------- */
.community-section { background: var(--white); }
.community-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}
.comm-feat {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius-md);
  background: var(--brand-light);
  transition: var(--transition);
}
.comm-feat:hover { background: rgba(255,107,26,0.06); transform: translateY(-3px); }
.comm-feat-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}
.comm-feat h4 { font-size: 0.95rem; font-weight: 700; color: var(--brand-dark); margin-bottom: 6px; }
.comm-feat p { font-size: 0.82rem; color: var(--text-sub); }

/* ---------- 合作品牌 ---------- */
.partners-wrap {
  overflow: hidden;
  padding: 20px 0;
}
.partners-track {
  display: flex;
  gap: 40px;
  animation: marquee 28s linear infinite;
  white-space: nowrap;
}
.partner-item {
  flex-shrink: 0;
  background: var(--white);
  border: 1.5px solid #E8ECF0;
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-sub);
  transition: var(--transition);
}
.partner-item:hover { border-color: var(--brand-orange); color: var(--brand-orange); }
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ---------- How-To加入 ---------- */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.howto-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-orange), var(--brand-blue));
  z-index: 0;
}
.howto-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--white);
  margin: 0 auto 14px;
  box-shadow: 0 4px 16px rgba(255,107,26,0.35);
}
.howto-step h4 { font-size: 0.95rem; font-weight: 700; color: var(--brand-dark); margin-bottom: 6px; }
.howto-step p { font-size: 0.82rem; color: var(--text-sub); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  border: 1.5px solid transparent;
  transition: var(--transition);
}
.faq-item.active { border-color: var(--brand-orange); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--brand-dark);
  transition: var(--transition);
}
.faq-q:hover { color: var(--brand-orange); }
.faq-q-icon {
  width: 28px;
  height: 28px;
  background: rgba(255,107,26,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--brand-orange);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.active .faq-q-icon { transform: rotate(45deg); background: var(--brand-orange); color: var(--white); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 22px;
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.8;
}
.faq-item.active .faq-a { max-height: 300px; padding: 0 22px 18px; }

/* ---------- 用户评价 ---------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--brand-orange);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.review-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--white);
  flex-shrink: 0;
}
.review-user h5 { font-size: 0.9rem; font-weight: 700; color: var(--brand-dark); }
.review-user span { font-size: 0.75rem; color: var(--text-light); }
.review-stars { color: #FFB347; font-size: 0.9rem; margin-bottom: 8px; }
.review-card p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.7; }
.review-tag { margin-top: 10px; }

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 { font-size: 1.4rem; font-weight: 800; color: var(--brand-dark); margin-bottom: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  padding: 14px;
  background: var(--brand-light);
  border-radius: var(--radius-sm);
}
.contact-item-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item-text h5 { font-size: 0.85rem; font-weight: 700; color: var(--brand-dark); margin-bottom: 2px; }
.contact-item-text p { font-size: 0.82rem; color: var(--text-sub); }
.qr-section { text-align: center; }
.qr-section h3 { font-size: 1.2rem; font-weight: 800; color: var(--brand-dark); margin-bottom: 20px; }
.qr-grid { display: flex; gap: 32px; justify-content: center; }
.qr-item { text-align: center; }
.qr-item img {
  width: 110px;
  height: 110px;
  border-radius: var(--radius-sm);
  border: 2px solid #E8ECF0;
  margin-bottom: 8px;
}
.qr-item p { font-size: 0.8rem; color: var(--text-sub); font-weight: 600; }

/* ---------- 社交分享 ---------- */
.share-section {
  background: var(--white);
  padding: 36px 0;
  border-top: 1px solid #E8ECF0;
}
.share-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.share-label { font-size: 0.9rem; font-weight: 700; color: var(--text-sub); }
.share-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 700;
  transition: var(--transition);
  border: 1.5px solid transparent;
}
.share-wechat { background: #07C160; color: var(--white); }
.share-weibo { background: #E6162D; color: var(--white); }
.share-douyin { background: var(--brand-dark); color: var(--white); }
.share-bilibili { background: #00A1D6; color: var(--white); }
.share-btn:hover { opacity: 0.85; transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--brand-dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand { }
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo img { width: 40px; height: 40px; border-radius: 8px; object-fit: cover; }
.footer-logo-text {
  font-size: 1.3rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { font-size: 0.85rem; line-height: 1.8; color: rgba(255,255,255,0.55); margin-bottom: 16px; }
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--brand-orange);
  display: inline-block;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--brand-orange); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.55); transition: var(--transition); }
.footer-bottom a:hover { color: var(--brand-orange); }
.footer-update { color: var(--brand-accent); font-weight: 600; }

/* ---------- 弹窗 ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: var(--brand-dark);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 600px;
  width: 90%;
  position: relative;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: var(--brand-orange); }
.modal-video-wrap {
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  overflow: hidden;
}
.modal-video-placeholder {
  text-align: center;
  color: rgba(255,255,255,0.6);
}
.modal-video-placeholder .big-play {
  font-size: 4rem;
  margin-bottom: 12px;
  color: var(--brand-orange);
}
.modal-video-placeholder p { font-size: 0.9rem; }
.modal-title { font-size: 1.1rem; font-weight: 800; color: var(--white); margin-bottom: 8px; }
.modal-meta { font-size: 0.82rem; color: rgba(255,255,255,0.5); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.82rem;
  color: var(--text-light);
}
.breadcrumb a { color: var(--text-sub); transition: var(--transition); }
.breadcrumb a:hover { color: var(--brand-orange); }
.breadcrumb span { margin: 0 8px; }

/* ---------- 内页Hero ---------- */
.inner-hero {
  background: linear-gradient(135deg, var(--brand-dark) 0%, #1A2A4A 100%);
  padding: 60px 0 40px;
  color: var(--white);
}
.inner-hero h1 {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.inner-hero h1 em {
  font-style: normal;
  color: var(--brand-orange);
}
.inner-hero p { color: rgba(255,255,255,0.7); font-size: 1rem; max-width: 600px; }

/* ---------- 内页内容卡片 ---------- */
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.content-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.content-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.content-card-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.content-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.content-card:hover .content-card-img img { transform: scale(1.06); }
.content-card-body { padding: 16px; }
.content-card-body h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; color: var(--brand-dark); }
.content-card-body p { font-size: 0.82rem; color: var(--text-sub); line-height: 1.6; }

/* ---------- 侧边栏 ---------- */
.sidebar-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.sidebar-card h4 {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--brand-dark);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--brand-orange);
}
.sidebar-list li {
  padding: 8px 0;
  border-bottom: 1px solid #F0F2F5;
  font-size: 0.85rem;
  color: var(--text-sub);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-list li:hover { color: var(--brand-orange); padding-left: 4px; }
.sidebar-list li:last-child { border-bottom: none; }

/* ---------- 换脸/黑料/泄密/猎奇特殊样式 ---------- */
.special-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.special-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 0;
  transition: var(--transition);
}
.special-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.special-card-img {
  width: 160px;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}
.special-card-img img { width: 100%; height: 100%; object-fit: cover; }
.special-card-body { padding: 16px; flex: 1; }
.special-card-body h3 { font-size: 0.92rem; font-weight: 700; margin-bottom: 6px; color: var(--brand-dark); }
.special-card-body p { font-size: 0.8rem; color: var(--text-sub); line-height: 1.6; margin-bottom: 10px; }
.special-meta { display: flex; gap: 12px; font-size: 0.75rem; color: var(--text-light); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .anime-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .howto-steps::before { display: none; }
}
@media (max-width: 768px) {
  .section-title { font-size: 1.6rem; }
  .hero-content { grid-template-columns: 1fr; gap: 32px; }
  .hero-text h1 { font-size: 2rem; }
  .hero-image-wrap { display: none; }
  .nav-menu { display: none; }
  .nav-actions .nav-btn-login { display: none; }
  .hamburger { display: flex; }
  .video-grid { grid-template-columns: 1fr; }
  .anime-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .community-features { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .special-grid { grid-template-columns: 1fr; }
  .content-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .anime-grid { grid-template-columns: 1fr; }
  .community-features { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
}

/* ---------- 移动端菜单 ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(13,27,42,0.97);
  z-index: 2000;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  transition: var(--transition);
}
.mobile-menu a:hover { color: var(--brand-orange); }
.mobile-menu-close {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 1.8rem;
  color: var(--white);
  cursor: pointer;
}

/* ---------- 懒加载占位 ---------- */
.lazy-img {
  background: linear-gradient(90deg, #E8ECF0 25%, #F5F7FA 50%, #E8ECF0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---------- 滚动到顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, var(--brand-orange), var(--brand-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,107,26,0.4);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); }

/* ---------- 内页两栏布局 ---------- */
.inner-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
@media (max-width: 900px) {
  .inner-layout { grid-template-columns: 1fr; }
}