/* ============================================
   糖心vlog 影视传媒视频社区 - 原创样式表
   配色方案：珊瑚粉 #FF6B9D + 碧蓝 #00D2BF + 深夜蓝 #0B1426
   风格：泳池派对 / 热带度假 / 影视传媒
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --coral: #FF6B9D;
  --coral-light: #FF8FB4;
  --coral-dark: #E84D7E;
  --aqua: #00D2BF;
  --aqua-light: #33E0D1;
  --aqua-dark: #00A899;
  --deep-blue: #0B1426;
  --night-blue: #101D35;
  --panel-bg: #131F3A;
  --card-bg: #182744;
  --text-primary: #F0F4FF;
  --text-secondary: #A0B4D0;
  --text-muted: #6B82A6;
  --gold: #FFD166;
  --sunset: #FF8C42;
  --lavender: #C490E4;
  --border-color: rgba(0, 210, 191, 0.15);
  --shadow-glow: 0 0 20px rgba(255, 107, 157, 0.15);
  --radius: 14px;
  --radius-sm: 8px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  background: var(--deep-blue);
  color: var(--text-primary);
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--aqua); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--coral-light); }

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

.d-none { display: none !important; }

/* === 容器 === */
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 24px; }

/* === 顶部导航 === */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: linear-gradient(180deg, rgba(11,20,38,0.97) 0%, rgba(11,20,38,0.88) 100%);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  padding: 0 0;
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1400px; margin: 0 auto; padding: 0 24px; height: 68px;
}

.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo img { height: 44px; width: auto; }
.site-logo .logo-text { font-size: 22px; font-weight: 700; color: var(--coral); letter-spacing: 1px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px; border-radius: 24px; font-size: 14.5px; font-weight: 500;
  color: var(--text-secondary); white-space: nowrap; transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: #fff; background: linear-gradient(135deg, var(--coral), var(--coral-dark));
}

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); margin: 5px 0; transition: var(--transition); border-radius: 2px; }

/* === 搜索框 === */
.search-bar-wrap {
  background: var(--night-blue); border-bottom: 1px solid var(--border-color);
  padding: 12px 0; margin-top: 68px;
}
.search-bar {
  display: flex; max-width: 640px; margin: 0 auto;
  background: var(--card-bg); border-radius: 32px; overflow: hidden;
  border: 1px solid var(--border-color);
}
.search-bar input {
  flex: 1; padding: 12px 22px; background: transparent; border: none; outline: none;
  color: var(--text-primary); font-size: 15px;
}
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar button {
  padding: 12px 28px; background: linear-gradient(135deg, var(--coral), var(--sunset));
  border: none; color: #fff; font-size: 15px; cursor: pointer; font-weight: 600;
  transition: var(--transition);
}
.search-bar button:hover { opacity: 0.88; }

/* === Banner === */
.hero-banner {
  position: relative; min-height: 520px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.hero-banner .banner-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.55) saturate(1.2);
}
.hero-banner .banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,20,38,0.3) 0%, rgba(11,20,38,0.85) 100%);
}
.hero-content {
  position: relative; z-index: 2; text-align: center; padding: 60px 24px;
  max-width: 800px;
}
.hero-content h1 { font-size: 42px; font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.hero-content h1 .brand-highlight { color: var(--coral); }
.hero-content h1 .video-highlight { color: var(--aqua); }
.hero-content p { font-size: 18px; color: var(--text-secondary); margin-bottom: 28px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 36px; border-radius: 32px; font-size: 16px; font-weight: 600;
  background: linear-gradient(135deg, var(--coral), var(--sunset)); color: #fff;
  border: none; cursor: pointer; transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255,107,157,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(255,107,157,0.5); color: #fff; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 36px; border-radius: 32px; font-size: 16px; font-weight: 600;
  background: transparent; color: var(--aqua); border: 2px solid var(--aqua);
  cursor: pointer; transition: var(--transition);
}
.btn-secondary:hover { background: var(--aqua); color: var(--deep-blue); }

/* === 通用区块 === */
.section { padding: 72px 0; }
.section-alt { background: var(--night-blue); }
.section-title {
  text-align: center; margin-bottom: 48px;
}
.section-title h2 {
  font-size: 32px; font-weight: 700; margin-bottom: 12px;
  background: linear-gradient(135deg, var(--coral), var(--aqua));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title p { color: var(--text-secondary); font-size: 16px; max-width: 600px; margin: 0 auto; }

/* === 视频卡片网格 === */
.video-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.video-card {
  background: var(--card-bg); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border-color); transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px); border-color: var(--coral);
  box-shadow: var(--shadow-glow);
}
.video-card .thumb {
  position: relative; padding-top: 56.25%; overflow: hidden;
}
.video-card .thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .thumb img { transform: scale(1.08); }
.video-card .play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.8);
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255,107,157,0.9); display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition);
  box-shadow: 0 0 30px rgba(255,107,157,0.5);
}
.video-card:hover .play-btn { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.play-btn::after {
  content: ''; display: block; width: 0; height: 0;
  border-style: solid; border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff; margin-left: 3px;
}
.video-card .duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75); color: #fff; padding: 2px 8px;
  border-radius: 4px; font-size: 12px; font-weight: 600;
}
.video-card .card-body { padding: 16px; }
.video-card .card-title {
  font-size: 15px; font-weight: 600; margin-bottom: 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  line-height: 1.5;
}
.video-card .card-meta {
  display: flex; align-items: center; gap: 12px; font-size: 12.5px; color: var(--text-muted);
}
.video-card .card-meta span { display: flex; align-items: center; gap: 4px; }
.video-card .tag {
  display: inline-block; padding: 2px 10px; border-radius: 12px; font-size: 11px;
  background: rgba(0,210,191,0.12); color: var(--aqua); margin-top: 8px;
}

/* === 分类标签栏 === */
.category-tabs {
  display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 36px;
}
.category-tabs .tab {
  padding: 8px 22px; border-radius: 24px; font-size: 14px; font-weight: 500;
  background: var(--card-bg); color: var(--text-secondary); border: 1px solid var(--border-color);
  cursor: pointer; transition: var(--transition);
}
.category-tabs .tab:hover, .category-tabs .tab.active {
  background: linear-gradient(135deg, var(--coral), var(--sunset)); color: #fff;
  border-color: transparent;
}

/* === 模块卡片（影视传媒/娱乐/AI等） === */
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.module-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 32px 24px;
  border: 1px solid var(--border-color); transition: var(--transition);
  text-align: center;
}
.module-card:hover { border-color: var(--aqua); transform: translateY(-4px); box-shadow: 0 0 25px rgba(0,210,191,0.15); }
.module-card .icon {
  width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center; font-size: 28px;
  background: linear-gradient(135deg, var(--coral), var(--sunset));
}
.module-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.module-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* === 专家团队 === */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.expert-card {
  background: var(--card-bg); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border-color); text-align: center; transition: var(--transition);
}
.expert-card:hover { border-color: var(--coral); transform: translateY(-4px); }
.expert-card .avatar {
  width: 100px; height: 100px; border-radius: 50%; margin: 28px auto 16px;
  overflow: hidden; border: 3px solid var(--coral);
}
.expert-card .avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 4px; }
.expert-card .role { font-size: 13px; color: var(--aqua); margin-bottom: 10px; }
.expert-card .bio { font-size: 13px; color: var(--text-secondary); padding: 0 18px 8px; line-height: 1.6; }
.expert-card .credentials { font-size: 12px; color: var(--text-muted); padding: 0 18px; margin-bottom: 6px; }
.expert-card .expert-links { display: flex; justify-content: center; gap: 12px; padding: 14px 0; }
.expert-card .expert-links a {
  padding: 6px 16px; border-radius: 20px; font-size: 12px; font-weight: 500;
  background: rgba(255,107,157,0.12); color: var(--coral); transition: var(--transition);
}
.expert-card .expert-links a:hover { background: var(--coral); color: #fff; }

/* === FAQ折叠 === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg); border-radius: var(--radius-sm); margin-bottom: 12px;
  border: 1px solid var(--border-color); overflow: hidden;
}
.faq-question {
  padding: 18px 24px; cursor: pointer; display: flex; justify-content: space-between;
  align-items: center; font-weight: 600; font-size: 15.5px; transition: var(--transition);
}
.faq-question:hover { color: var(--coral); }
.faq-question .arrow { transition: transform 0.3s ease; font-size: 18px; color: var(--aqua); }
.faq-item.open .faq-question .arrow { transform: rotate(180deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 14.5px; line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 400px; padding-bottom: 18px; }

/* === 用户评论 === */
.review-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.review-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 24px;
  border: 1px solid var(--border-color);
}
.review-card .stars { color: var(--gold); font-size: 16px; margin-bottom: 10px; letter-spacing: 2px; }
.review-card .review-text { font-size: 14.5px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.review-card .reviewer { display: flex; align-items: center; gap: 10px; }
.review-card .reviewer-name { font-weight: 600; font-size: 14px; }
.review-card .reviewer-date { font-size: 12px; color: var(--text-muted); }

/* === 合作品牌墙 === */
.partner-wall {
  display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; align-items: center;
}
.partner-wall .partner-item {
  background: var(--card-bg); border-radius: var(--radius-sm); padding: 18px 32px;
  border: 1px solid var(--border-color); font-size: 15px; font-weight: 600;
  color: var(--text-secondary); transition: var(--transition);
}
.partner-wall .partner-item:hover { border-color: var(--aqua); color: var(--aqua); }

/* === 联系信息 === */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.contact-card {
  background: var(--card-bg); border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--border-color);
}
.contact-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 16px; color: var(--coral); }
.contact-card .info-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 14.5px; }
.contact-card .info-label { color: var(--text-muted); min-width: 70px; }
.contact-card .info-value { color: var(--text-primary); }

/* === 社交分享 === */
.share-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.share-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px; border-radius: 24px; font-size: 14px; font-weight: 500;
  border: 1px solid var(--border-color); color: var(--text-secondary);
  background: var(--card-bg); transition: var(--transition); cursor: pointer;
}
.share-btn:hover { border-color: var(--coral); color: var(--coral); }

/* === 面包屑 === */
.breadcrumb {
  padding: 14px 0; font-size: 13.5px; color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--aqua); }
.breadcrumb .sep { margin: 0 8px; }

/* === 页脚 === */
.site-footer {
  background: var(--night-blue); border-top: 1px solid var(--border-color);
  padding: 48px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px;
  padding-bottom: 36px;
}
.footer-col h4 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--coral); }
.footer-col p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.7; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 13.5px; color: var(--text-secondary); }
.footer-col ul li a:hover { color: var(--aqua); }
.footer-col .qr-wrap { display: flex; gap: 16px; margin-top: 10px; }
.footer-col .qr-wrap img { width: 100px; height: 100px; border-radius: 8px; }
.footer-col .qr-label { font-size: 12px; color: var(--text-muted); text-align: center; margin-top: 4px; }

.footer-bottom {
  border-top: 1px solid var(--border-color); padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--text-muted);
}
.footer-bottom .footer-logo { display: flex; align-items: center; gap: 8px; }
.footer-bottom .footer-logo img { height: 28px; }

/* === 回到顶部 === */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 999;
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--coral), var(--sunset));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 20px; cursor: pointer; opacity: 0; visibility: hidden;
  transition: var(--transition); box-shadow: 0 4px 16px rgba(255,107,157,0.4);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* === 内页通用 === */
.page-hero {
  padding: 120px 0 48px; text-align: center;
  background: linear-gradient(180deg, var(--night-blue) 0%, var(--deep-blue) 100%);
}
.page-hero h1 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: var(--text-secondary); }

.content-wrap { display: grid; grid-template-columns: 1fr 300px; gap: 32px; padding: 40px 0; }
.content-main { min-width: 0; }
.content-sidebar {}

.sidebar-block {
  background: var(--card-bg); border-radius: var(--radius); padding: 22px;
  border: 1px solid var(--border-color); margin-bottom: 22px;
}
.sidebar-block h3 { font-size: 16px; font-weight: 600; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }
.sidebar-block .sidebar-link {
  display: block; padding: 8px 0; font-size: 14px; color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.sidebar-block .sidebar-link:hover { color: var(--coral); }

/* === How-To步骤 === */
.howto-steps { counter-reset: step; }
.howto-step {
  display: flex; gap: 20px; margin-bottom: 24px; padding: 20px;
  background: var(--card-bg); border-radius: var(--radius-sm); border: 1px solid var(--border-color);
}
.howto-step::before {
  counter-increment: step; content: counter(step);
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--coral), var(--sunset));
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; color: #fff;
}
.howto-step h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.howto-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* === 视频播放模态 === */
.video-modal {
  display: none; position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.88); align-items: center; justify-content: center;
}
.video-modal.active { display: flex; }
.video-modal .modal-content {
  background: var(--card-bg); border-radius: var(--radius); padding: 32px;
  max-width: 640px; width: 90%; text-align: center;
}
.video-modal .modal-close {
  position: absolute; top: 20px; right: 24px; font-size: 32px; color: #fff;
  cursor: pointer; background: none; border: none;
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; position: fixed; top: 68px; left: 0; right: 0; background: var(--deep-blue); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border-color); }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .hero-content h1 { font-size: 28px; }
  .hero-banner { min-height: 400px; }
  .section { padding: 48px 0; }
  .section-title h2 { font-size: 24px; }
  .content-wrap { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 22px; }
  .hero-btns { flex-direction: column; }
  .header-inner { height: 56px; }
  .search-bar-wrap { margin-top: 56px; }
  .btn-primary, .btn-secondary { padding: 12px 24px; font-size: 14px; }
}