/* ============================================
   校花传媒 - 樱花暮光主题 原创CSS
   配色：深邃星空蓝 #0a0e1a + 樱花粉 #f472b6 + 薰衣草紫 #a78bfa + 暖阳金 #fbbf24
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a1f35;
  --bg-card-hover: #222845;
  --accent-pink: #f472b6;
  --accent-purple: #a78bfa;
  --accent-gold: #fbbf24;
  --accent-pink-dim: rgba(244,114,182,0.15);
  --accent-purple-dim: rgba(167,139,250,0.15);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(167,139,250,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 40px rgba(244,114,182,0.15);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --max-width: 1200px;
}

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

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

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

a { color: var(--accent-pink); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-purple); }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* === 顶部导航 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10,14,26,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  height: 64px;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.logo-link:hover { color: var(--accent-pink); }

.logo-img { border-radius: 8px; }

.logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav { display: flex; gap: 6px; }

.nav-item {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-item:hover, .nav-item.active {
  color: var(--accent-pink);
  background: var(--accent-pink-dim);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* === 搜索栏 === */
.search-bar-wrap {
  margin-top: 64px;
  background: var(--bg-secondary);
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.search-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.search-form {
  display: flex;
  gap: 0;
  max-width: 680px;
  margin: 0 auto;
}

.search-input {
  flex: 1;
  padding: 12px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.search-input:focus { border-color: var(--accent-pink); }

.search-input::placeholder { color: var(--text-muted); }

.search-btn {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  border: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover { opacity: 0.9; transform: translateY(-1px); }

.search-hot {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.search-hot a {
  color: var(--text-secondary);
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--bg-card);
  font-size: 0.82rem;
}

.search-hot a:hover { color: var(--accent-pink); background: var(--accent-pink-dim); }

/* === Hero Section === */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.4);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,14,26,0.3) 0%, rgba(10,14,26,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  padding: 60px 20px;
}

.hero-content h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple), var(--accent-gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.3;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-btns { display: flex; gap: 16px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }

.btn-primary {
  display: inline-block;
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(244,114,182,0.3); color: #fff; }

.btn-secondary {
  display: inline-block;
  padding: 14px 32px;
  background: transparent;
  color: var(--accent-pink);
  border: 2px solid var(--accent-pink);
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-secondary:hover { background: var(--accent-pink-dim); color: var(--accent-pink); transform: translateY(-2px); }

.hero-stats { display: flex; gap: 40px; justify-content: center; flex-wrap: wrap; }

.stat-item { text-align: center; }

.stat-num {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-gold);
}

.stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* === 通用 Section === */
.section-block { padding: 72px 0; }

.section-alt { background: var(--bg-secondary); }

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title.align-left { text-align: left; }

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 48px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* === 视频卡片网格 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent-pink); }

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }

.video-card:hover .video-thumb img { transform: scale(1.05); }

.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.video-card:hover .play-overlay { opacity: 1; }

.play-btn {
  width: 56px;
  height: 56px;
  background: rgba(244,114,182,0.9);
  border-radius: 50%;
  position: relative;
}

.play-btn::after {
  content: '';
  position: absolute;
  left: 22px;
  top: 16px;
  border-style: solid;
  border-width: 12px 0 12px 20px;
  border-color: transparent transparent transparent #fff;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}

.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.video-info { padding: 16px; }

.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* === 服务卡片 === */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent-pink); }

.service-icon { font-size: 2.5rem; margin-bottom: 16px; }

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--accent-pink);
}

.service-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-purple);
}

.service-link:hover { color: var(--accent-pink); }

/* === 娱乐专区 === */
.entertain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.entertain-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.entertain-card:hover { transform: translateY(-3px); border-color: var(--accent-purple); }

.entertain-icon { font-size: 2rem; margin-bottom: 12px; }

.entertain-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--accent-purple);
}

.entertain-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* === AI赋能 === */
.ai-section-wrap {
  display: flex;
  gap: 48px;
  align-items: center;
}

.ai-text { flex: 1; }

.ai-text p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.8; }

.ai-features { list-style: none; margin-bottom: 28px; }

.ai-features li {
  padding: 8px 0;
  padding-left: 24px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.ai-features li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-pink);
  font-weight: bold;
}

.ai-features li strong { color: var(--text-primary); }

.ai-image {
  flex: 1;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.ai-image img { width: 100%; }

/* === 社区功能 === */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.community-card:hover { transform: translateY(-3px); border-color: var(--accent-gold); }

.community-icon { font-size: 2rem; margin-bottom: 12px; }

.community-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--accent-gold);
}

.community-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

.community-banner {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.community-banner img { width: 100%; height: 300px; object-fit: cover; }

/* === 专家展示 === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
}

.expert-card:hover { box-shadow: var(--shadow-hover); border-color: var(--accent-pink); }

.expert-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--accent-pink);
  object-fit: cover;
}

.expert-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }

.expert-title { color: var(--accent-purple); font-size: 0.9rem; margin-bottom: 12px; }

.expert-desc { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; margin-bottom: 16px; }

.expert-awards { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 20px; }

.award-tag {
  background: var(--accent-pink-dim);
  color: var(--accent-pink);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.expert-actions { display: flex; gap: 12px; justify-content: center; }

.btn-small {
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.btn-small:hover { color: #fff; opacity: 0.9; }

.btn-small-outline {
  padding: 8px 20px;
  border: 1px solid var(--accent-pink);
  color: var(--accent-pink);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.btn-small-outline:hover { background: var(--accent-pink-dim); }

/* === How-To步骤 === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.step-card:hover { transform: translateY(-3px); border-color: var(--accent-pink); }

.step-num {
  font-size: 2.5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-pink), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.step-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; }

.step-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}

.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover { color: var(--accent-pink); }

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent-pink);
  transition: var(--transition);
}

.faq-item.active .faq-question::after { content: '−'; }

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}

/* === 用户评价 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.review-card:hover { border-color: var(--accent-gold); transform: translateY(-2px); }

.review-stars { color: var(--accent-gold); font-size: 1.1rem; margin-bottom: 12px; letter-spacing: 2px; }

.review-text {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
  margin-bottom: 16px;
  font-style: italic;
}

.review-author { border-top: 1px solid var(--border-color); padding-top: 12px; }

.author-name { font-weight: 700; font-size: 0.9rem; display: block; margin-bottom: 2px; }

.author-info { font-size: 0.8rem; color: var(--text-muted); }

/* === 合作品牌墙 === */
.partner-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.partner-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition);
}

.partner-item:hover { border-color: var(--accent-pink); color: var(--accent-pink); }

/* === 社交分享 === */
.share-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.share-btn {
  padding: 12px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  color: #fff;
  transition: var(--transition);
}

.share-btn:hover { transform: translateY(-2px); color: #fff; }

.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-douyin { background: #161823; border: 1px solid #444; }
.share-bilibili { background: #00a1d6; }

/* === 联系我们 === */
.contact-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; color: var(--accent-pink); }

.contact-item { margin-bottom: 16px; }

.contact-item h5 { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 4px; font-weight: 600; }

.contact-item p { font-size: 0.95rem; color: var(--text-secondary); }

.contact-qr { display: flex; gap: 24px; }

.qr-item { text-align: center; }

.qr-item img {
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 8px;
}

.qr-item p { font-size: 0.85rem; color: var(--text-muted); }

/* === 底部 === */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
}

.footer-inner { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 32px;
}

.footer-brand { max-width: 320px; }

.footer-brand .logo-text { display: inline-block; margin-bottom: 8px; }

.footer-brand p { font-size: 0.88rem; color: var(--text-muted); margin-top: 8px; }

.footer-links { display: flex; gap: 48px; }

.footer-col h5 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.footer-col a, .footer-col p {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-bottom p { margin-bottom: 4px; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .service-grid, .entertain-grid, .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .ai-section-wrap { flex-direction: column; }
  .section-title.align-left { text-align: center; }
}

@media (max-width: 768px) {
  .main-nav { display: none; position: fixed; top: 64px; left: 0; right: 0; background: var(--bg-primary); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border-color); z-index: 999; }
  .main-nav.active { display: flex; }
  .mobile-menu-btn { display: flex; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-desc { font-size: 0.92rem; }
  .hero-stats { gap: 20px; }
  .stat-num { font-size: 1.2rem; }
  .video-grid, .review-grid, .community-grid { grid-template-columns: 1fr; }
  .service-grid, .entertain-grid, .steps-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-qr { justify-content: center; }
  .footer-top { flex-direction: column; gap: 24px; }
  .footer-links { flex-direction: column; gap: 24px; }
  .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .section-block { padding: 48px 0; }
  .section-title { font-size: 1.4rem; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-stats { flex-direction: column; gap: 12px; }
  .share-buttons { flex-direction: column; align-items: center; }
  .search-form { flex-direction: column; }
  .search-input { border-radius: var(--radius); border-right: 1px solid var(--border-color); }
  .search-btn { border-radius: var(--radius); margin-top: 8px; }
  .search-hot { flex-wrap: wrap; }
}

/* === 面包屑导航 === */
.breadcrumb {
  padding: 12px 0;
  margin-bottom: 24px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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