/* ========================================
   香蕉视频 - 影视传媒视频社区 全新原创样式
   配色：粉紫渐变 + 珊瑚橙 + 暖白
   域名：tlf88.cn
   ======================================== */

:root {
  --pink-primary: #FF6B9D;
  --coral: #FF8A65;
  --purple-soft: #9C6ADE;
  --purple-deep: #7B2FBE;
  --lavender: #E8D5F5;
  --blush: #FFF0F5;
  --cream: #FFF8F0;
  --warm-white: #FEFCFA;
  --text-dark: #2D1B3D;
  --text-body: #4A3B5C;
  --text-muted: #8E7BA8;
  --border-light: #F0E4F7;
  --gradient-hero: linear-gradient(135deg, #FF6B9D 0%, #9C6ADE 50%, #667EEA 100%);
  --gradient-card: linear-gradient(135deg, #FFF0F5 0%, #F3E8FF 100%);
  --gradient-btn: linear-gradient(135deg, #FF6B9D 0%, #FF8A65 100%);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-soft: 0 4px 20px rgba(156,106,222,0.1);
  --shadow-card: 0 8px 32px rgba(156,106,222,0.12);
  --shadow-hover: 0 12px 40px rgba(255,107,157,0.2);
  --transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-body);
  background: var(--warm-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 头部导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; max-width: 1200px; margin: 0 auto; padding: 0 20px;
}

.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-link img { height: 40px; width: auto; border-radius: 8px; }
.logo-text {
  font-size: 1.3rem; font-weight: 800; color: var(--text-dark);
  letter-spacing: -0.5px;
}
.logo-text span { color: var(--pink-primary); }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 0.92rem; font-weight: 500; color: var(--text-body);
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  background: var(--blush); color: var(--pink-primary);
}

.menu-toggle {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 8px;
}
.menu-toggle span {
  width: 24px; height: 2.5px; background: var(--text-dark);
  border-radius: 2px; transition: var(--transition);
}

/* ===== 搜索框 ===== */
.search-bar {
  background: var(--gradient-card); padding: 16px 0;
  border-bottom: 1px solid var(--border-light);
  margin-top: 72px;
}
.search-form {
  display: flex; max-width: 680px; margin: 0 auto;
  background: #fff; border-radius: var(--radius-xl);
  overflow: hidden; box-shadow: var(--shadow-soft);
  border: 2px solid transparent;
  transition: var(--transition);
}
.search-form:focus-within { border-color: var(--pink-primary); }
.search-form input {
  flex: 1; border: none; outline: none; padding: 14px 24px;
  font-size: 0.95rem; background: transparent; color: var(--text-dark);
}
.search-form input::placeholder { color: var(--text-muted); }
.search-form button {
  background: var(--gradient-btn); border: none; padding: 14px 28px;
  color: #fff; font-size: 0.95rem; font-weight: 600; cursor: pointer;
  border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
  transition: var(--transition);
}
.search-form button:hover { opacity: 0.9; transform: scale(1.02); }

/* ===== Hero区域 ===== */
.hero-section {
  background: var(--gradient-hero);
  min-height: 520px; display: flex; align-items: center;
  position: relative; overflow: hidden;
}
.hero-section::before {
  content: ''; position: absolute; inset: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="30" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="70" cy="20" r="3" fill="rgba(255,255,255,0.08)"/><circle cx="50" cy="70" r="1.5" fill="rgba(255,255,255,0.12)"/><circle cx="85" cy="55" r="2.5" fill="rgba(255,255,255,0.06)"/></svg>');
  background-size: 200px;
}
.hero-content {
  position: relative; z-index: 2; max-width: 680px;
  padding: 60px 0; color: #fff;
}
.hero-content h1 {
  font-size: 2.8rem; font-weight: 900; line-height: 1.2;
  margin-bottom: 16px; text-shadow: 0 2px 20px rgba(0,0,0,0.15);
}
.hero-content p {
  font-size: 1.1rem; opacity: 0.92; margin-bottom: 28px; line-height: 1.8;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span {
  background: rgba(255,255,255,0.2); backdrop-filter: blur(10px);
  padding: 6px 18px; border-radius: var(--radius-xl);
  font-size: 0.85rem; border: 1px solid rgba(255,255,255,0.3);
}
.hero-btn {
  display: inline-block; background: #fff; color: var(--pink-primary);
  padding: 14px 36px; border-radius: var(--radius-xl);
  font-weight: 700; font-size: 1rem; margin-top: 24px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  transition: var(--transition);
}
.hero-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.2); color: var(--purple-deep); }

/* ===== 通用板块 ===== */
.section { padding: 64px 0; }
.section-alt { background: var(--blush); }
.section-cream { background: var(--cream); }

.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 {
  font-size: 1.8rem; font-weight: 800; color: var(--text-dark);
  margin-bottom: 8px;
}
.section-header h3 {
  font-size: 1.05rem; color: var(--text-muted); font-weight: 400;
}
.section-header .divider {
  width: 60px; height: 4px; background: var(--gradient-btn);
  border-radius: 2px; margin: 16px auto 0;
}

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

.video-card {
  background: #fff; border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-soft);
  transition: var(--transition); cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px); box-shadow: var(--shadow-hover);
}

.video-thumb {
  position: relative; padding-top: 56.25%; overflow: hidden;
  background: var(--lavender);
}
.video-thumb video,
.video-thumb img {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform 0.5s ease;
}
.video-card:hover .video-thumb video,
.video-card:hover .video-thumb img { transform: scale(1.08); }

.video-poster {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 1; transition: opacity 0.3s;
}

.play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 56px; height: 56px; background: rgba(255,107,157,0.9);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: var(--transition); z-index: 5;
  box-shadow: 0 4px 20px rgba(255,107,157,0.4);
}
.play-btn::after {
  content: ''; width: 0; height: 0;
  border-left: 18px solid #fff; border-top: 11px solid transparent;
  border-bottom: 11px solid transparent; margin-left: 4px;
}
.video-card:hover .play-btn { opacity: 1; }

.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.7); color: #fff; padding: 2px 8px;
  border-radius: 4px; font-size: 0.75rem; z-index: 3;
}

.video-info { padding: 16px; }
.video-info h4 {
  font-size: 0.95rem; font-weight: 700; color: var(--text-dark);
  margin-bottom: 8px; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-meta {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.8rem; color: var(--text-muted);
}
.video-meta .views::before { content: '▶ '; }
.video-meta .likes::before { content: '♥ '; color: var(--pink-primary); }

/* ===== 专家卡片 ===== */
.expert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.expert-card {
  background: #fff; border-radius: var(--radius-md); padding: 28px;
  text-align: center; box-shadow: var(--shadow-soft);
  transition: var(--transition); border: 1px solid var(--border-light);
}
.expert-card:hover {
  transform: translateY(-4px); box-shadow: var(--shadow-card);
  border-color: var(--pink-primary);
}
.expert-avatar {
  width: 90px; height: 90px; border-radius: 50%; margin: 0 auto 16px;
  object-fit: cover; border: 3px solid var(--lavender);
}
.expert-card h4 {
  font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 4px;
}
.expert-card .role {
  font-size: 0.82rem; color: var(--pink-primary); margin-bottom: 10px;
}
.expert-card p {
  font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px;
}
.expert-card .contact-info {
  font-size: 0.78rem; color: var(--text-muted); margin-bottom: 12px;
}
.expert-btn {
  display: inline-block; background: var(--gradient-btn); color: #fff;
  padding: 8px 20px; border-radius: var(--radius-xl);
  font-size: 0.82rem; font-weight: 600; margin: 4px;
  transition: var(--transition);
}
.expert-btn:hover { opacity: 0.85; color: #fff; transform: scale(1.05); }
.expert-btn.outline {
  background: transparent; border: 1.5px solid var(--pink-primary);
  color: var(--pink-primary);
}
.expert-btn.outline:hover { background: var(--blush); }

/* ===== 社区板块 ===== */
.community-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.community-card {
  background: var(--gradient-card); border-radius: var(--radius-md);
  padding: 28px; border: 1px solid var(--border-light);
  transition: var(--transition);
}
.community-card:hover {
  transform: translateY(-3px); box-shadow: var(--shadow-card);
}
.community-card .icon {
  font-size: 2rem; margin-bottom: 12px;
}
.community-card h4 {
  font-size: 1rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px;
}
.community-card p {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.6;
}

/* ===== AI赋能 ===== */
.ai-features {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.ai-card {
  background: #fff; border-radius: var(--radius-md); padding: 32px;
  box-shadow: var(--shadow-soft); transition: var(--transition);
  border-top: 3px solid transparent;
}
.ai-card:hover {
  border-top-color: var(--pink-primary);
  transform: translateY(-4px); box-shadow: var(--shadow-card);
}
.ai-card .ai-icon {
  width: 56px; height: 56px; background: var(--gradient-card);
  border-radius: var(--radius-sm); display: flex; align-items: center;
  justify-content: center; font-size: 1.5rem; margin-bottom: 16px;
}
.ai-card h4 {
  font-size: 1.05rem; font-weight: 700; color: var(--text-dark); margin-bottom: 10px;
}
.ai-card p {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.7;
}

/* ===== 品牌墙 ===== */
.brand-wall {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
}
.brand-wall-item {
  background: #fff; border-radius: var(--radius-sm);
  padding: 18px; text-align: center; font-size: 0.88rem;
  font-weight: 600; color: var(--text-muted);
  border: 1px solid var(--border-light); transition: var(--transition);
}
.brand-wall-item:hover {
  border-color: var(--pink-primary); color: var(--pink-primary);
  box-shadow: var(--shadow-soft);
}

/* ===== How-To指南 ===== */
.howto-steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  counter-reset: step;
}
.howto-step {
  background: #fff; border-radius: var(--radius-md); padding: 28px;
  text-align: center; box-shadow: var(--shadow-soft);
  position: relative; counter-increment: step;
}
.howto-step::before {
  content: counter(step);
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; background: var(--gradient-btn);
  color: #fff; font-weight: 800; font-size: 1.1rem;
  border-radius: 50%; margin: 0 auto 16px;
}
.howto-step h4 {
  font-size: 0.95rem; font-weight: 700; color: var(--text-dark); margin-bottom: 8px;
}
.howto-step p {
  font-size: 0.82rem; color: var(--text-muted); line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: var(--radius-sm);
  margin-bottom: 12px; box-shadow: var(--shadow-soft);
  overflow: hidden; border: 1px solid var(--border-light);
}
.faq-question {
  padding: 18px 24px; font-weight: 700; color: var(--text-dark);
  cursor: pointer; display: flex; justify-content: space-between;
  align-items: center; font-size: 0.95rem;
  transition: var(--transition);
}
.faq-question:hover { background: var(--blush); }
.faq-question::after {
  content: '+'; font-size: 1.4rem; color: var(--pink-primary);
  font-weight: 300; transition: var(--transition);
}
.faq-item.active .faq-question::after { content: '−'; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 24px; font-size: 0.88rem; color: var(--text-muted); line-height: 1.8;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }

/* ===== 用户评论 ===== */
.review-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.review-card {
  background: #fff; border-radius: var(--radius-md); padding: 28px;
  box-shadow: var(--shadow-soft); border: 1px solid var(--border-light);
}
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-btn); display: flex; align-items: center;
  justify-content: center; color: #fff; font-weight: 700; font-size: 1.1rem;
}
.review-name { font-weight: 700; color: var(--text-dark); font-size: 0.92rem; }
.review-date { font-size: 0.78rem; color: var(--text-muted); }
.review-stars { color: #FFB800; font-size: 0.9rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--text-body); line-height: 1.7; }

/* ===== 分享栏 ===== */
.share-bar {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; padding: 20px 0;
}
.share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 22px; border-radius: var(--radius-xl);
  font-size: 0.85rem; font-weight: 600; color: #fff;
  transition: var(--transition);
}
.share-btn:hover { transform: translateY(-2px); opacity: 0.9; color: #fff; }
.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #161823; }
.share-btn.bilibili { background: #FB7299; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px;
}
.contact-info-card {
  background: #fff; border-radius: var(--radius-md); padding: 32px;
  box-shadow: var(--shadow-soft);
}
.contact-info-card h3 {
  font-size: 1.15rem; font-weight: 700; color: var(--text-dark);
  margin-bottom: 20px; padding-bottom: 12px;
  border-bottom: 2px solid var(--lavender);
}
.contact-item {
  display: flex; gap: 12px; margin-bottom: 14px;
  font-size: 0.9rem; color: var(--text-body);
}
.contact-item strong { color: var(--text-dark); min-width: 80px; }
.qr-codes { display: flex; gap: 24px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-item img { width: 120px; height: 120px; border-radius: var(--radius-sm); margin-bottom: 8px; }
.qr-item p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--text-dark); color: rgba(255,255,255,0.7); padding: 48px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 32px;
}
.footer-brand .logo-text { color: #fff; font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand .logo-text span { color: var(--pink-primary); }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; margin-bottom: 16px; }
.footer-brand img { height: 36px; margin-bottom: 12px; border-radius: 6px; }

.footer-col h4 {
  color: #fff; font-size: 0.95rem; font-weight: 700; margin-bottom: 16px;
}
.footer-col a {
  display: block; color: rgba(255,255,255,0.6); font-size: 0.85rem;
  margin-bottom: 10px; transition: var(--transition);
}
.footer-col a:hover { color: var(--pink-primary); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-bottom: 4px; }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 14px 0; font-size: 0.84rem; color: var(--text-muted);
  margin-top: 72px;
}
.breadcrumb a { color: var(--pink-primary); }
.breadcrumb span { margin: 0 6px; }

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed; bottom: 30px; right: 30px; z-index: 999;
  width: 48px; height: 48px; background: var(--gradient-btn);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.2rem; cursor: pointer;
  opacity: 0; visibility: hidden; transition: var(--transition);
  box-shadow: 0 4px 16px rgba(255,107,157,0.3);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { transform: translateY(-3px); }

/* ===== EEAT数据条 ===== */
.eeat-bar {
  background: var(--gradient-hero); color: #fff; padding: 20px 0;
}
.eeat-stats {
  display: flex; justify-content: center; gap: 48px; text-align: center;
}
.eeat-stat .num { font-size: 1.6rem; font-weight: 900; }
.eeat-stat .label { font-size: 0.82rem; opacity: 0.85; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .ai-features { grid-template-columns: repeat(2, 1fr); }
  .eeat-stats { gap: 28px; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(255,255,255,0.98); padding: 16px;
    box-shadow: var(--shadow-card); border-top: 1px solid var(--border-light);
  }
  .menu-toggle { display: flex; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-section { min-height: 400px; }
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .ai-features { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .brand-wall { grid-template-columns: repeat(3, 1fr); }
  .share-bar { flex-wrap: wrap; }
  .section { padding: 40px 0; }
  .section-header h2 { font-size: 1.4rem; }
  .eeat-stats { flex-wrap: wrap; gap: 16px; }
  .eeat-stat { flex: 0 0 40%; }
}

@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .hero-content h1 { font-size: 1.5rem; }
  .hero-content p { font-size: 0.88rem; }
  .hero-section { min-height: 340px; }
  .section { padding: 32px 0; }
  .section-header h2 { font-size: 1.25rem; }
  .video-info h4 { font-size: 0.88rem; }
  .video-meta { font-size: 0.75rem; }
  .expert-card { padding: 20px; }
  .faq-question { font-size: 0.88rem; padding: 14px 18px; }
  .faq-answer { padding: 0 18px; font-size: 0.82rem; }
  .review-card { padding: 20px; }
  .brand-wall { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .share-btn { font-size: 0.8rem; padding: 8px 16px; }
  .footer-bottom p { font-size: 0.72rem; }
}