/* ===== 国产主播 全站样式 ===== */
/* 原创配色方案: 深紫#1a0a2e 金琥珀#d4a843 暗紫#2d1b69 浅金#f0d78c 暖灰#e8e0d0 */

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

:root {
  --primary: #2d1b69;
  --primary-dark: #1a0a2e;
  --accent: #d4a843;
  --accent-light: #f0d78c;
  --bg-warm: #faf7f2;
  --bg-section: #f5f0e8;
  --text-main: #2c2c2c;
  --text-light: #6b6b6b;
  --text-white: #ffffff;
  --card-shadow: 0 4px 20px rgba(45,27,105,0.12);
  --transition: all 0.3s ease;
  --radius: 12px;
}

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

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

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

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(26,10,46,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(212,168,67,0.2);
  transition: var(--transition);
}

.header-inner {
  display:flex; align-items:center; justify-content:space-between;
  max-width:1200px; margin:0 auto; padding:0 20px; height:68px;
}

.logo-wrap { display:flex; align-items:center; gap:10px; }
.logo-wrap img { height:42px; width:auto; }
.logo-wrap .brand-name {
  font-size:1.3rem; font-weight:700; color:var(--accent);
  letter-spacing:2px;
}

.main-nav { display:flex; align-items:center; gap:0; }
.main-nav a {
  color: var(--text-white); padding:0 16px; font-size:0.95rem;
  height:68px; line-height:68px; position:relative;
  transition: var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent);
  background: rgba(212,168,67,0.1);
}
.main-nav a::after {
  content:''; position:absolute; bottom:0; left:50%; transform:translateX(-50%);
  width:0; height:3px; background:var(--accent); transition: var(--transition);
  border-radius:2px 2px 0 0;
}
.main-nav a:hover::after, .main-nav a.active::after { width:60%; }

.nav-toggle { display:none; flex-direction:column; gap:5px; cursor:pointer; padding:10px; }
.nav-toggle span { display:block; width:24px; height:2px; background:var(--text-white); transition:var(--transition); }

/* 搜索框 */
.search-bar {
  background: var(--primary-dark);
  padding: 12px 0;
  margin-top: 68px;
  border-bottom: 1px solid rgba(212,168,67,0.15);
}
.search-bar .container { display:flex; justify-content:center; }
.search-box {
  display:flex; max-width:560px; width:100%;
  border-radius:30px; overflow:hidden;
  border:2px solid var(--accent);
}
.search-box input {
  flex:1; padding:10px 20px; border:none; outline:none;
  background:rgba(255,255,255,0.08); color:var(--text-white);
  font-size:0.95rem;
}
.search-box input::placeholder { color:rgba(255,255,255,0.4); }
.search-box button {
  padding:10px 24px; background:var(--accent); border:none;
  color:var(--primary-dark); font-weight:600; cursor:pointer;
  transition:var(--transition); font-size:0.95rem;
}
.search-box button:hover { background:var(--accent-light); }

/* ===== Banner ===== */
.hero-banner {
  position:relative; overflow:hidden;
  min-height:520px; display:flex; align-items:center;
  background: var(--primary-dark);
}
.hero-banner .banner-bg {
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; opacity:0.7;
}
.hero-banner .banner-overlay {
  position:absolute; inset:0;
  background: linear-gradient(135deg, rgba(26,10,46,0.85) 0%, rgba(45,27,105,0.6) 50%, rgba(26,10,46,0.8) 100%);
}
.hero-content {
  position:relative; z-index:2; text-align:center;
  max-width:800px; margin:0 auto; padding:60px 20px;
}
.hero-content h1 {
  font-size:2.8rem; color:var(--accent); margin-bottom:16px;
  text-shadow:0 2px 20px rgba(212,168,67,0.3);
  line-height:1.3;
}
.hero-content h1 span { color:var(--text-white); }
.hero-content p {
  font-size:1.15rem; color:rgba(255,255,255,0.85);
  margin-bottom:28px; line-height:1.8;
}
.hero-btns { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; }
.btn {
  display:inline-block; padding:12px 32px; border-radius:30px;
  font-size:1rem; font-weight:600; transition:var(--transition);
  cursor:pointer; border:none;
}
.btn-primary { background:var(--accent); color:var(--primary-dark); }
.btn-primary:hover { background:var(--accent-light); transform:translateY(-2px); box-shadow:0 6px 20px rgba(212,168,67,0.4); color:var(--primary-dark); }
.btn-outline { background:transparent; color:var(--accent); border:2px solid var(--accent); }
.btn-outline:hover { background:var(--accent); color:var(--primary-dark); }

/* ===== 通用板块 ===== */
.section { padding:70px 0; }
.section-alt { background:var(--bg-section); }
.section-dark { background:var(--primary-dark); color:var(--text-white); }

.section-header {
  text-align:center; margin-bottom:48px;
}
.section-header h2 {
  font-size:2rem; color:var(--primary); margin-bottom:12px;
  position:relative; display:inline-block;
}
.section-dark .section-header h2 { color:var(--accent); }
.section-header h2::after {
  content:''; display:block; width:60px; height:3px;
  background:var(--accent); margin:12px auto 0;
  border-radius:2px;
}
.section-header p {
  font-size:1.05rem; color:var(--text-light); max-width:680px; margin:0 auto;
}
.section-dark .section-header p { color:rgba(255,255,255,0.7); }

/* ===== 视频卡片网格 ===== */
.video-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(320px,1fr));
  gap:24px;
}
.video-card {
  border-radius:var(--radius); overflow:hidden;
  background:#fff; box-shadow:var(--card-shadow);
  transition:var(--transition);
}
.video-card:hover { transform:translateY(-6px); box-shadow:0 12px 36px rgba(45,27,105,0.18); }

.video-thumb {
  position:relative; overflow:hidden; aspect-ratio:16/9;
  cursor:pointer;
}
.video-thumb img { width:100%; height:100%; object-fit:cover; transition:var(--transition); }
.video-thumb:hover img { transform:scale(1.05); }
.play-btn {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%) scale(0);
  width:64px; height:64px; background:rgba(212,168,67,0.9);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  transition:var(--transition);
}
.play-btn::after {
  content:''; width:0; height:0;
  border-left:22px solid var(--primary-dark);
  border-top:14px solid transparent;
  border-bottom:14px solid transparent;
  margin-left:4px;
}
.video-thumb:hover .play-btn { transform:translate(-50%,-50%) scale(1); }

.video-info { padding:16px; }
.video-info h3 { font-size:1.05rem; margin-bottom:8px; color:var(--primary); line-height:1.4; }
.video-meta { display:flex; gap:16px; font-size:0.85rem; color:var(--text-light); flex-wrap:wrap; }
.video-meta span { display:flex; align-items:center; gap:4px; }
.video-tags { display:flex; gap:6px; margin-top:10px; flex-wrap:wrap; }
.video-tags span {
  padding:3px 10px; background:rgba(45,27,105,0.08);
  border-radius:12px; font-size:0.78rem; color:var(--primary);
}

/* ===== 模块卡片 ===== */
.module-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:24px;
}
.module-card {
  background:#fff; border-radius:var(--radius); padding:32px 24px;
  text-align:center; box-shadow:var(--card-shadow);
  transition:var(--transition); border-top:4px solid transparent;
}
.module-card:hover { border-top-color:var(--accent); transform:translateY(-4px); }
.module-card .icon {
  width:64px; height:64px; margin:0 auto 16px;
  background:linear-gradient(135deg, var(--primary), var(--accent));
  border-radius:16px; display:flex; align-items:center; justify-content:center;
  font-size:1.8rem; color:#fff;
}
.module-card h3 { font-size:1.1rem; color:var(--primary); margin-bottom:8px; }
.module-card p { font-size:0.9rem; color:var(--text-light); line-height:1.6; }

/* ===== 专家展示 ===== */
.expert-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:28px;
}
.expert-card {
  background:#fff; border-radius:var(--radius); overflow:hidden;
  box-shadow:var(--card-shadow); transition:var(--transition);
  text-align:center;
}
.expert-card:hover { transform:translateY(-4px); }
.expert-card .avatar {
  width:120px; height:120px; border-radius:50%; margin:28px auto 16px;
  overflow:hidden; border:3px solid var(--accent);
}
.expert-card .avatar img { width:100%; height:100%; object-fit:cover; }
.expert-card h3 { font-size:1.1rem; color:var(--primary); }
.expert-card .role { font-size:0.85rem; color:var(--accent); margin-bottom:12px; }
.expert-card .bio { font-size:0.88rem; color:var(--text-light); padding:0 20px 8px; line-height:1.6; }
.expert-card .expert-btns { padding:0 20px 24px; display:flex; gap:8px; justify-content:center; }
.expert-card .expert-btns a {
  padding:6px 16px; border-radius:20px; font-size:0.82rem;
  border:1px solid var(--accent); color:var(--accent);
  transition:var(--transition);
}
.expert-card .expert-btns a:hover { background:var(--accent); color:var(--primary-dark); }

/* ===== 社区板块 ===== */
.community-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:24px;
}
.community-card {
  border-radius:var(--radius); overflow:hidden;
  background:#fff; box-shadow:var(--card-shadow);
  transition:var(--transition);
}
.community-card:hover { transform:translateY(-4px); }
.community-card .thumb { aspect-ratio:16/9; overflow:hidden; }
.community-card .thumb img { width:100%; height:100%; object-fit:cover; transition:var(--transition); }
.community-card:hover .thumb img { transform:scale(1.05); }
.community-card .info { padding:16px; }
.community-card .info h3 { font-size:1.05rem; color:var(--primary); margin-bottom:6px; }
.community-card .info p { font-size:0.88rem; color:var(--text-light); }

/* ===== AI赋能 ===== */
.ai-section { position:relative; overflow:hidden; }
.ai-section .ai-bg {
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; opacity:0.15;
}
.ai-content { position:relative; z-index:2; }
.ai-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(300px,1fr));
  gap:24px;
}
.ai-card {
  background:rgba(255,255,255,0.06); border:1px solid rgba(212,168,67,0.2);
  border-radius:var(--radius); padding:28px;
  transition:var(--transition);
}
.ai-card:hover { background:rgba(212,168,67,0.1); border-color:var(--accent); }
.ai-card h3 { color:var(--accent); font-size:1.05rem; margin-bottom:10px; }
.ai-card p { color:rgba(255,255,255,0.75); font-size:0.9rem; line-height:1.7; }

/* ===== FAQ ===== */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  background:#fff; border-radius:var(--radius); margin-bottom:12px;
  box-shadow:var(--card-shadow); overflow:hidden;
}
.faq-question {
  padding:18px 24px; cursor:pointer; display:flex;
  justify-content:space-between; align-items:center;
  font-weight:600; color:var(--primary); font-size:1rem;
  transition:var(--transition);
}
.faq-question:hover { background:rgba(45,27,105,0.03); }
.faq-question .arrow {
  width:20px; height:20px; transition:var(--transition);
  border-right:2px solid var(--accent); border-bottom:2px solid var(--accent);
  transform:rotate(45deg); flex-shrink:0;
}
.faq-item.open .faq-question .arrow { transform:rotate(-135deg); }
.faq-answer {
  max-height:0; overflow:hidden; transition:max-height 0.4s ease;
  padding:0 24px;
}
.faq-item.open .faq-answer { max-height:300px; padding:0 24px 18px; }
.faq-answer p { color:var(--text-light); font-size:0.92rem; line-height:1.7; }

/* ===== 用户评价 ===== */
.review-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(280px,1fr));
  gap:24px;
}
.review-card {
  background:#fff; border-radius:var(--radius); padding:24px;
  box-shadow:var(--card-shadow); position:relative;
}
.review-card::before {
  content:'\201C'; position:absolute; top:12px; left:16px;
  font-size:3rem; color:rgba(212,168,67,0.2); font-family:serif; line-height:1;
}
.review-card .stars { color:var(--accent); font-size:0.9rem; margin-bottom:10px; letter-spacing:2px; }
.review-card .text { font-size:0.92rem; color:var(--text-light); line-height:1.7; margin-bottom:14px; }
.review-card .reviewer { display:flex; align-items:center; gap:10px; }
.review-card .reviewer .avatar-sm {
  width:40px; height:40px; border-radius:50%;
  background:var(--primary); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-weight:700; font-size:0.9rem;
}
.review-card .reviewer .name { font-weight:600; font-size:0.9rem; color:var(--primary); }
.review-card .reviewer .date { font-size:0.78rem; color:var(--text-light); }

/* ===== 合作品牌墙 ===== */
.brand-wall {
  display:flex; flex-wrap:wrap; justify-content:center; gap:32px;
  align-items:center;
}
.brand-wall .brand-item {
  width:140px; height:70px; background:rgba(45,27,105,0.05);
  border-radius:8px; display:flex; align-items:center; justify-content:center;
  font-size:0.9rem; color:var(--text-light); font-weight:600;
  transition:var(--transition); border:1px solid rgba(45,27,105,0.08);
}
.brand-wall .brand-item:hover { border-color:var(--accent); color:var(--accent); }

/* ===== How-To 指南 ===== */
.howto-steps {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(220px,1fr));
  gap:24px; max-width:960px; margin:0 auto;
}
.howto-step {
  text-align:center; padding:24px 16px;
}
.howto-step .step-num {
  width:48px; height:48px; border-radius:50%;
  background:var(--accent); color:var(--primary-dark);
  display:flex; align-items:center; justify-content:center;
  font-size:1.3rem; font-weight:700; margin:0 auto 14px;
}
.howto-step h4 { color:var(--primary); margin-bottom:8px; font-size:1rem; }
.howto-step p { font-size:0.88rem; color:var(--text-light); }

/* ===== 联系我们 ===== */
.contact-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(280px,1fr));
  gap:28px;
}
.contact-card {
  background:rgba(255,255,255,0.06); border:1px solid rgba(212,168,67,0.2);
  border-radius:var(--radius); padding:28px; text-align:center;
}
.contact-card h3 { color:var(--accent); margin-bottom:12px; font-size:1.05rem; }
.contact-card p { color:rgba(255,255,255,0.75); font-size:0.9rem; line-height:1.8; }
.contact-card img { max-width:160px; margin:12px auto 0; border-radius:8px; }

/* ===== 社交分享 ===== */
.share-bar {
  display:flex; justify-content:center; gap:16px; flex-wrap:wrap;
  padding:20px 0;
}
.share-btn {
  padding:10px 20px; border-radius:24px; font-size:0.88rem;
  font-weight:600; transition:var(--transition); cursor:pointer;
  border:none; color:#fff;
}
.share-wechat { background:#07c160; }
.share-weibo { background:#e6162d; }
.share-douyin { background:#161823; }
.share-bilibili { background:#00a1d6; }
.share-btn:hover { opacity:0.85; transform:translateY(-2px); }

/* ===== 页脚 ===== */
.site-footer {
  background:var(--primary-dark); color:rgba(255,255,255,0.7);
  padding:48px 0 0;
}
.footer-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(220px,1fr));
  gap:32px; margin-bottom:36px;
}
.footer-col h4 { color:var(--accent); margin-bottom:14px; font-size:1rem; }
.footer-col p, .footer-col a { font-size:0.88rem; color:rgba(255,255,255,0.6); line-height:2; display:block; }
.footer-col a:hover { color:var(--accent); }
.footer-col .qr-img { width:120px; border-radius:8px; margin-top:8px; }

.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.08);
  padding:20px 0; text-align:center; font-size:0.82rem;
  color:rgba(255,255,255,0.4);
}
.footer-bottom a { color:rgba(255,255,255,0.5); }
.footer-bottom a:hover { color:var(--accent); }
.footer-bottom p { margin-bottom:4px; }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding:14px 0; font-size:0.88rem; color:var(--text-light);
  background:var(--bg-section);
}
.breadcrumb a { color:var(--primary); }
.breadcrumb span { color:var(--text-light); }
.page-hero + .breadcrumb { margin-top:0; }
.search-bar + .breadcrumb { margin-top:0; }

/* ===== 内页通用 ===== */
.page-hero {
  position:relative; min-height:320px; display:flex; align-items:center;
  background:var(--primary-dark); margin-top:68px;
}
.page-hero .banner-bg {
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover; opacity:0.5;
}
.page-hero .banner-overlay {
  position:absolute; inset:0;
  background:linear-gradient(135deg, rgba(26,10,46,0.8) 0%, rgba(45,27,105,0.5) 100%);
}
.page-hero .hero-content { padding:40px 20px; }
.page-hero h1 { font-size:2.2rem; color:var(--accent); margin-bottom:10px; }
.page-hero p { font-size:1.05rem; color:rgba(255,255,255,0.8); }

/* ===== 视频时长标签 ===== */
.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:0.78rem; font-weight:600;
  z-index:3;
}

/* ===== 作者标签 ===== */
.video-meta .author {
  font-weight:600; color:var(--primary);
}
.author-line {
  font-size:0.9rem; color:var(--text-light);
  margin-top:8px;
}

/* ===== 文章内容 ===== */
.article-content {
  max-width:800px; margin:0 auto;
  font-size:0.95rem; line-height:1.8;
}
.article-content h2 {
  font-size:1.3rem; color:var(--primary);
  margin:32px 0 12px; padding-bottom:8px;
  border-bottom:2px solid var(--accent);
}
.article-content p {
  margin-bottom:16px; color:var(--text-main);
}
.article-content ul {
  margin:0 0 16px 24px;
}
.article-content li {
  margin-bottom:8px; color:var(--text-light);
  line-height:1.7;
}

/* ===== 懒加载 ===== */
.lazy { opacity:0; transition:opacity 0.5s ease; }
.lazy.loaded { opacity:1; }

/* ===== 响应式 ===== */
@media (max-width:768px) {
  .header-inner { height:56px; }
  .logo-wrap img { height:32px; }
  .logo-wrap .brand-name { font-size:1.1rem; }
  
  .main-nav {
    position:fixed; top:56px; left:0; right:0;
    background:rgba(26,10,46,0.98); flex-direction:column;
    max-height:0; overflow:hidden; transition:max-height 0.4s ease;
  }
  .main-nav.open { max-height:500px; }
  .main-nav a { height:auto; line-height:1; padding:14px 20px; border-bottom:1px solid rgba(255,255,255,0.05); }
  .nav-toggle { display:flex; }
  
  .search-bar { margin-top:56px; }
  .hero-banner { min-height:400px; }
  .hero-content h1 { font-size:1.8rem; }
  .hero-content p { font-size:1rem; }
  
  .section { padding:48px 0; }
  .section-header h2 { font-size:1.5rem; }
  
  .video-grid { grid-template-columns:1fr; }
  .module-grid { grid-template-columns:repeat(2,1fr); }
  .expert-grid { grid-template-columns:repeat(2,1fr); }
  .review-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:repeat(2,1fr); }
  .breadcrumb { margin-top:56px; }
  .page-hero { margin-top:56px; min-height:240px; }
  .page-hero h1 { font-size:1.6rem; }
}

@media (max-width:480px) {
  .module-grid { grid-template-columns:1fr; }
  .expert-grid { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .howto-steps { grid-template-columns:1fr; }
}