/* ============================================
   看片 - 看片 全站样式
   品牌色系：看片主题
   域名：nnLL5v.cn
   ============================================ */

/* === 基础重置 === */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#2c3e50;background:#f8fafc;line-height:1.8;overflow-x:hidden}
a{text-decoration:none;color:#1a7ab5;transition:color .3s}
a:hover{color:#0d5a8e}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.4;color:#1a2332}

/* === 颜色变量 === */
:root{
  --primary:#1a7ab5;
  --primary-dark:#0d5a8e;
  --primary-light:#4da8d4;
  --accent:#d4a843;
  --accent-light:#f0d68a;
  --bg-dark:#0f1923;
  --bg-card:#ffffff;
  --bg-section:#f0f5f9;
  --bg-gradient:linear-gradient(135deg,#0f1923 0%,#1a3a52 50%,#1a7ab5 100%);
  --text-primary:#1a2332;
  --text-secondary:#5a6b7d;
  --text-light:#8899aa;
  --border:#dce4ec;
  --shadow:0 4px 20px rgba(26,122,181,0.08);
  --shadow-hover:0 8px 32px rgba(26,122,181,0.15);
  --radius:12px;
}

/* === 容器 === */
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.container-wide{max-width:1400px;margin:0 auto;padding:0 20px}

/* === 顶部导航 === */
.site-header{background:var(--bg-dark);position:sticky;top:0;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,0.3)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:10px 20px;max-width:1400px;margin:0 auto}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{width:42px;height:42px;border-radius:50%}
.logo-wrap .brand-name{font-size:1.5rem;font-weight:800;color:#fff;letter-spacing:2px}
.logo-wrap .brand-name span{color:var(--accent)}

.main-nav{display:flex;align-items:center;gap:0}
.main-nav a{color:#c8d8e8;padding:12px 16px;font-size:.9rem;font-weight:500;transition:all .3s;position:relative}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(26,122,181,0.2)}
.main-nav a::after{content:'';position:absolute;bottom:0;left:50%;width:0;height:2px;background:var(--accent);transition:all .3s;transform:translateX(-50%)}
.main-nav a:hover::after,.main-nav a.active::after{width:60%}

.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* === 搜索框 === */
.search-bar{background:linear-gradient(90deg,var(--primary-dark),var(--primary));padding:12px 0}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:600px;width:100%;background:#fff;border-radius:30px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,0.1)}
.search-form input{flex:1;border:none;padding:12px 24px;font-size:.95rem;outline:none;background:transparent}
.search-form button{background:var(--accent);color:#fff;border:none;padding:12px 28px;font-size:.9rem;cursor:pointer;font-weight:600;transition:background .3s}
.search-form button:hover{background:#c49a35}

/* === Banner === */
.hero-banner{position:relative;height:520px;overflow:hidden;background:var(--bg-dark)}
.hero-banner .banner-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(0.6)}
.hero-banner .banner-content{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;padding:0 20px}
.hero-banner h1{font-size:2.8rem;color:#fff;text-shadow:0 4px 20px rgba(0,0,0,0.5);margin-bottom:16px}
.hero-banner h1 .highlight{color:var(--accent)}
.hero-banner .subtitle{font-size:1.15rem;color:#d0e0f0;max-width:700px;line-height:1.8;margin-bottom:24px}
.hero-banner .cta-group{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 32px;border-radius:30px;font-weight:600;font-size:.95rem;transition:all .3s;cursor:pointer;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover);color:#fff}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:#c49a35;transform:translateY(-2px);color:#fff}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.5)}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,0.1);color:#fff}

/* === 通用区块 === */
.section{padding:60px 0}
.section-alt{background:var(--bg-section)}
.section-dark{background:var(--bg-dark);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark .text-secondary{color:#a0b8d0}
.section-title{text-align:center;margin-bottom:48px}
.section-title h2{font-size:2rem;margin-bottom:12px;position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:3px;background:var(--accent);margin:12px auto 0}
.section-title p{color:var(--text-secondary);font-size:1rem;max-width:600px;margin:0 auto}
.text-secondary{color:var(--text-secondary)}

/* === 视频卡片 === */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:all .3s;position:relative}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.video-thumb{position:relative;padding-top:56.25%;overflow:hidden;background:#1a2332}
.video-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.video-card:hover .video-thumb img{transform:scale(1.05)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .3s;background:rgba(0,0,0,0.3)}
.video-card:hover .video-play-btn{opacity:1}
.video-play-btn span{width:60px;height:60px;background:rgba(26,122,181,0.9);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem;box-shadow:0 4px 16px rgba(0,0,0,0.3)}
.video-info{padding:16px}
.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.video-info h3 a{color:var(--text-primary)}
.video-info h3 a:hover{color:var(--primary)}
.video-meta{display:flex;align-items:center;gap:12px;font-size:.8rem;color:var(--text-light)}
.video-meta span{display:flex;align-items:center;gap:4px}
.video-tag{display:inline-block;padding:2px 10px;border-radius:12px;font-size:.75rem;background:rgba(26,122,181,0.1);color:var(--primary);margin-top:8px}
.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:.75rem}

/* === 专家卡片 === */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.expert-card{background:var(--bg-card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);text-align:center;padding:32px 20px;transition:all .3s}
.expert-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.expert-card .avatar{width:100px;height:100px;border-radius:50%;margin:0 auto 16px;object-fit:cover;border:3px solid var(--primary-light)}
.expert-card h4{font-size:1.1rem;margin-bottom:4px}
.expert-card .role{color:var(--primary);font-size:.85rem;margin-bottom:12px}
.expert-card p{font-size:.85rem;color:var(--text-secondary);margin-bottom:16px}
.expert-card .expert-btns{display:flex;gap:8px;justify-content:center}
.expert-card .expert-btns a{padding:6px 16px;border-radius:20px;font-size:.8rem;font-weight:500}

/* === FAQ === */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius);margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-question{padding:18px 24px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .3s}
.faq-question:hover{background:rgba(26,122,181,0.05)}
.faq-question .icon{font-size:1.2rem;color:var(--primary);transition:transform .3s}
.faq-question.active .icon{transform:rotate(45deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all .3s;color:var(--text-secondary);font-size:.9rem;line-height:1.8}
.faq-answer.show{padding:0 24px 18px;max-height:500px}

/* === 评论 === */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);position:relative}
.review-card::before{content:'\201C';font-size:4rem;color:rgba(26,122,181,0.1);position:absolute;top:8px;left:16px;font-family:Georgia,serif}
.review-card .stars{color:var(--accent);margin-bottom:12px;font-size:1rem}
.review-card .review-text{font-size:.9rem;color:var(--text-secondary);margin-bottom:16px;line-height:1.8}
.review-card .reviewer{display:flex;align-items:center;gap:12px}
.review-card .reviewer-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary-light);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.review-card .reviewer-info .name{font-weight:600;font-size:.9rem}
.review-card .reviewer-info .date{font-size:.75rem;color:var(--text-light)}

/* === 分类模块 === */
.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.category-card{background:var(--bg-card);border-radius:var(--radius);padding:24px 16px;text-align:center;box-shadow:var(--shadow);transition:all .3s;cursor:pointer}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-bottom:3px solid var(--primary)}
.category-card .cat-icon{font-size:2.5rem;margin-bottom:12px}
.category-card h4{font-size:.95rem;margin-bottom:4px}
.category-card p{font-size:.8rem;color:var(--text-light)}

/* === AI赋能 === */
.ai-features{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ai-card{background:linear-gradient(135deg,rgba(26,122,181,0.05),rgba(212,168,67,0.05));border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:all .3s}
.ai-card:hover{border-color:var(--primary);box-shadow:var(--shadow-hover)}
.ai-card .ai-icon{width:64px;height:64px;margin:0 auto 16px;background:var(--bg-gradient);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.5rem}
.ai-card h4{margin-bottom:8px}
.ai-card p{font-size:.85rem;color:var(--text-secondary)}

/* === 合作品牌 === */
.brand-wall{display:flex;flex-wrap:wrap;gap:24px;justify-content:center;align-items:center}
.brand-wall .brand-item{background:var(--bg-card);padding:16px 32px;border-radius:var(--radius);box-shadow:var(--shadow);font-weight:700;color:var(--text-secondary);font-size:1.1rem;transition:all .3s}
.brand-wall .brand-item:hover{color:var(--primary);box-shadow:var(--shadow-hover)}

/* === 联系我们 === */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.contact-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);text-align:center}
.contact-card h4{margin-bottom:12px;color:var(--primary)}
.contact-card p{font-size:.9rem;color:var(--text-secondary);margin-bottom:8px}

/* === 社交分享 === */
.share-bar{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;padding:20px 0}
.share-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 20px;border-radius:20px;font-size:.85rem;font-weight:500;transition:all .3s;color:#fff}
.share-btn.wechat{background:#07c160}
.share-btn.weibo{background:#e6162d}
.share-btn.douyin-share{background:#161823}
.share-btn.bilibili{background:#00a1d6}
.share-btn:hover{transform:translateY(-2px);opacity:0.9;color:#fff}

/* === 页脚 === */
.site-footer{background:var(--bg-dark);color:#a0b8d0;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-bottom:32px}
.footer-col h4{color:#fff;font-size:1rem;margin-bottom:16px;position:relative;padding-bottom:8px}
.footer-col h4::after{content:'';position:absolute;bottom:0;left:0;width:30px;height:2px;background:var(--accent)}
.footer-col a{display:block;color:#8899aa;font-size:.85rem;padding:4px 0;transition:color .3s}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-col p{font-size:.85rem;line-height:1.8}
.footer-qr{display:flex;gap:16px;margin-top:12px}
.footer-qr img{width:100px;height:100px;border-radius:8px;border:2px solid rgba(255,255,255,0.1)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.1);padding:20px 0;text-align:center;font-size:.8rem}
.footer-bottom .update-time{margin-top:4px;color:var(--text-light)}

/* === 面包屑 === */
.breadcrumb{padding:12px 0;font-size:.85rem;color:var(--text-light)}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 6px;color:var(--text-light)}

/* === 内页Banner === */
.page-banner{background:var(--bg-gradient);padding:48px 0;text-align:center;color:#fff}
.page-banner h1{font-size:2rem;margin-bottom:8px}
.page-banner p{color:#a0c8e8;font-size:1rem}

/* === How-To指南 === */
.howto-steps{max-width:800px;margin:0 auto}
.howto-step{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.howto-step .step-num{width:48px;height:48px;min-width:48px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem}
.howto-step .step-content h4{margin-bottom:4px}
.howto-step .step-content p{font-size:.9rem;color:var(--text-secondary)}

/* === 数据统计 === */
.stats-bar{display:flex;justify-content:center;gap:48px;padding:32px 0;flex-wrap:wrap}
.stat-item{text-align:center}
.stat-item .num{font-size:2.5rem;font-weight:800;color:var(--accent);display:block}
.stat-item .label{font-size:.85rem;color:var(--text-light)}

/* === 标签云 === */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.tag-cloud a{padding:6px 16px;background:rgba(26,122,181,0.08);color:var(--primary);border-radius:20px;font-size:.8rem;transition:all .3s}
.tag-cloud a:hover{background:var(--primary);color:#fff}

/* === 内容文章 === */
.article-content{max-width:800px;margin:0 auto;padding:32px 0}
.article-content h2{font-size:1.5rem;margin:32px 0 16px;padding-left:12px;border-left:4px solid var(--primary)}
.article-content h3{font-size:1.2rem;margin:24px 0 12px}
.article-content p{margin-bottom:16px;color:var(--text-secondary);line-height:2}
.article-content img{border-radius:var(--radius);margin:16px 0}

/* === 干扰标签隐藏 === */
.drtag{position:absolute;width:0;height:0;overflow:hidden;opacity:0;pointer-events:none;z-index:-9999}

/* === 响应式 === */
@media(max-width:1024px){
  .ai-features{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-dark);flex-direction:column;padding:16px 0;box-shadow:0 8px 24px rgba(0,0,0,0.3)}
  .main-nav.show{display:flex}
  .mobile-toggle{display:block}
  .hero-banner{height:400px}
  .hero-banner h1{font-size:1.8rem}
  .video-grid{grid-template-columns:repeat(2,1fr)}
  .ai-features{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:repeat(2,1fr)}
  .stats-bar{gap:24px}
  .stat-item .num{font-size:1.8rem}
  .review-grid{grid-template-columns:1fr}
  .category-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:480px){
  .video-grid{grid-template-columns:1fr}
  .expert-grid{grid-template-columns:1fr}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .header-inner{padding:8px 12px}
  .logo-wrap .brand-name{font-size:1.2rem}
  .section{padding:40px 0}
}

/* === 动画 === */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.fade-in{animation:fadeInUp .6s ease forwards}

/* === 懒加载占位 === */
.lazy-placeholder{background:linear-gradient(90deg,#eef2f7 25%,#dce4ec 50%,#eef2f7 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}