/* ===================================================
   国产自拍 HAIJIAO - 主样式表
   derxp.cn | 国产自拍网 | 国产自拍社区
   =================================================== */

/* ---- CSS变量 ---- */
:root {
  --primary: #0d2b4e;
  --primary-light: #1a4a7a;
  --accent: #e8a020;
  --accent-light: #f5c050;
  --bg-dark: #0a1628;
  --bg-mid: #112240;
  --bg-light: #f7f9fc;
  --text-main: #1a2a3a;
  --text-muted: #6b7c93;
  --text-light: #e8edf2;
  --border: #d0dce8;
  --card-shadow: 0 4px 20px rgba(13,43,78,0.12);
  --card-hover: 0 8px 32px rgba(13,43,78,0.22);
  --radius: 10px;
  --radius-lg: 18px;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

/* ---- 重置与基础 ---- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;color:var(--text-main);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit}

/* ---- 布局容器 ---- */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-sm{padding:48px 0}

/* ---- 排版 ---- */
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:var(--primary)}
h1{font-size:clamp(1.8rem,4vw,2.8rem)}
h2{font-size:clamp(1.4rem,3vw,2.1rem)}
h3{font-size:clamp(1.1rem,2.5vw,1.5rem)}
h4{font-size:1.15rem}
p{margin-bottom:1em}
.text-center{text-align:center}
.text-muted{color:var(--text-muted)}

/* ---- 按钮 ---- */
.btn{display:inline-flex;align-items:center;gap:6px;padding:10px 26px;border-radius:50px;font-size:.95rem;font-weight:600;transition:all var(--transition);cursor:pointer}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-light);color:#fff;transform:translateY(-2px);box-shadow:0 6px 20px rgba(232,160,32,0.4)}
.btn-outline{border:2px solid var(--accent);color:var(--accent)}
.btn-outline:hover{background:var(--accent);color:#fff}
.btn-dark{background:var(--primary);color:#fff}
.btn-dark:hover{background:var(--primary-light);color:#fff}
.btn-sm{padding:7px 18px;font-size:.85rem}

/* ---- 标签 ---- */
.tag{display:inline-block;padding:3px 12px;border-radius:50px;font-size:.78rem;font-weight:600;background:rgba(13,43,78,0.08);color:var(--primary)}
.tag-accent{background:rgba(232,160,32,0.15);color:var(--accent)}
.tag-red{background:rgba(220,50,50,0.1);color:#dc3232}

/* ---- 节标题 ---- */
.section-header{text-align:center;margin-bottom:48px}
.section-header h2{position:relative;display:inline-block;padding-bottom:14px}
.section-header h2::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:60px;height:3px;background:var(--accent);border-radius:2px}
.section-header p{color:var(--text-muted);margin-top:12px;font-size:1.05rem}

/* ===================================================
   顶部通知栏
   =================================================== */
.top-bar{background:var(--bg-dark);color:rgba(255,255,255,0.8);font-size:.82rem;padding:7px 0;text-align:center}
.top-bar a{color:var(--accent-light)}
.top-bar .top-bar-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}

/* ===================================================
   导航栏
   =================================================== */
.navbar{background:#fff;box-shadow:0 2px 16px rgba(13,43,78,0.10);position:sticky;top:0;z-index:1000;transition:box-shadow var(--transition)}
.navbar.scrolled{box-shadow:0 4px 24px rgba(13,43,78,0.18)}
.navbar-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.navbar-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.navbar-brand img{height:48px;width:auto}
.navbar-brand .brand-text{font-size:1.3rem;font-weight:800;color:var(--primary);letter-spacing:.5px}
.navbar-brand .brand-text span{color:var(--accent)}
.navbar-nav{display:flex;align-items:center;gap:4px}
.nav-item{position:relative}
.nav-link{display:block;padding:8px 14px;font-size:.92rem;font-weight:600;color:var(--text-main);border-radius:6px;transition:all var(--transition);white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--accent);background:rgba(232,160,32,0.08)}
.nav-link.active::after{content:'';position:absolute;bottom:-2px;left:14px;right:14px;height:2px;background:var(--accent);border-radius:2px}
.dropdown-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:180px;background:#fff;border-radius:var(--radius);box-shadow:var(--card-shadow);border:1px solid var(--border);opacity:0;visibility:hidden;transform:translateY(8px);transition:all var(--transition);z-index:100}
.nav-item:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{display:block;padding:10px 18px;font-size:.9rem;color:var(--text-main);transition:all var(--transition)}
.dropdown-menu a:hover{color:var(--accent);background:var(--bg-light);padding-left:22px}
.navbar-actions{display:flex;align-items:center;gap:10px}
.hamburger{display:none;flex-direction:column;gap:5px;padding:6px;cursor:pointer}
.hamburger span{display:block;width:24px;height:2px;background:var(--primary);border-radius:2px;transition:all var(--transition)}

/* ---- 搜索框 ---- */
.search-bar-wrap{background:var(--bg-light);border-bottom:1px solid var(--border);padding:10px 0}
.search-bar-inner{display:flex;align-items:center;gap:10px;max-width:700px;margin:0 auto;padding:0 20px}
.search-bar-inner form{display:flex;flex:1;background:#fff;border:2px solid var(--border);border-radius:50px;overflow:hidden;transition:border-color var(--transition)}
.search-bar-inner form:focus-within{border-color:var(--accent)}
.search-bar-inner input{flex:1;padding:9px 20px;font-size:.95rem;border:none;outline:none;color:var(--text-main);background:transparent}
.search-bar-inner button{padding:9px 22px;background:var(--accent);color:#fff;font-weight:600;font-size:.9rem;border:none;cursor:pointer;transition:background var(--transition)}
.search-bar-inner button:hover{background:var(--primary)}
.search-hot-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:.82rem;color:var(--text-muted)}
.search-hot-tags a{color:var(--primary-light);padding:2px 10px;border-radius:50px;background:rgba(13,43,78,0.06);transition:all var(--transition)}
.search-hot-tags a:hover{background:var(--accent);color:#fff}

/* ===================================================
   Hero Banner
   =================================================== */
.hero{position:relative;min-height:520px;display:flex;align-items:center;overflow:hidden;background:var(--bg-dark)}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.45}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,22,40,0.92) 0%,rgba(10,22,40,0.55) 60%,rgba(10,22,40,0.3) 100%)}
.hero-content{position:relative;z-index:2;max-width:680px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(232,160,32,0.18);border:1px solid rgba(232,160,32,0.4);color:var(--accent-light);padding:5px 16px;border-radius:50px;font-size:.82rem;font-weight:600;margin-bottom:20px}
.hero h1{color:#fff;margin-bottom:18px;text-shadow:0 2px 12px rgba(0,0,0,0.4)}
.hero h1 span{color:var(--accent)}
.hero p{color:rgba(255,255,255,0.82);font-size:1.1rem;margin-bottom:28px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:32px;margin-top:40px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat .num{font-size:1.8rem;font-weight:800;color:var(--accent)}
.hero-stat .label{font-size:.82rem;color:rgba(255,255,255,0.65)}

/* ===================================================
   视频卡片
   =================================================== */
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.video-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--card-shadow);transition:all var(--transition);cursor:pointer}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--card-hover)}
.video-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0a1628}
.video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
.video-card:hover .video-thumb img{transform:scale(1.06)}
.video-play-btn{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity var(--transition);background:rgba(10,22,40,0.45)}
.video-card:hover .video-play-btn{opacity:1}
.play-icon{width:60px;height:60px;background:rgba(232,160,32,0.92);border-radius:50%;display:flex;align-items:center;justify-content:center;transform:scale(0.8);transition:transform var(--transition)}
.video-card:hover .play-icon{transform:scale(1)}
.play-icon svg{width:24px;height:24px;fill:#fff;margin-left:4px}
.video-duration{position:absolute;bottom:10px;right:10px;background:rgba(0,0,0,0.75);color:#fff;font-size:.75rem;padding:2px 8px;border-radius:4px}
.video-live-badge{position:absolute;top:10px;left:10px;background:#e53935;color:#fff;font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:4px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.7}}
.video-info{padding:16px}
.video-title{font-size:.97rem;font-weight:700;color:var(--text-main);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;justify-content:space-between;font-size:.8rem;color:var(--text-muted)}
.video-meta .views{display:flex;align-items:center;gap:4px}
.video-stats{display:flex;gap:14px;font-size:.8rem;color:var(--text-muted);margin-top:8px}
.video-stats span{display:flex;align-items:center;gap:3px}
.video-author{display:flex;align-items:center;gap:8px;margin-top:10px}
.video-author img{width:28px;height:28px;border-radius:50%;object-fit:cover}
.video-author span{font-size:.82rem;color:var(--text-muted)}

/* ===================================================
   图片卡片
   =================================================== */
.photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.photo-card{border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:3/4;cursor:pointer}
.photo-card img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
.photo-card:hover img{transform:scale(1.08)}
.photo-card-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(10,22,40,0.8) 0%,transparent 60%);opacity:0;transition:opacity var(--transition)}
.photo-card:hover .photo-card-overlay{opacity:1}
.photo-card-info{position:absolute;bottom:0;left:0;right:0;padding:16px;color:#fff;transform:translateY(10px);opacity:0;transition:all var(--transition)}
.photo-card:hover .photo-card-info{transform:translateY(0);opacity:1}

/* ===================================================
   专家卡片
   =================================================== */
.expert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:28px}
.expert-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--card-shadow);transition:all var(--transition);text-align:center}
.expert-card:hover{transform:translateY(-5px);box-shadow:var(--card-hover)}
.expert-avatar{width:100%;height:200px;object-fit:cover;object-position:top}
.expert-info{padding:20px}
.expert-name{font-size:1.1rem;font-weight:700;color:var(--primary);margin-bottom:4px}
.expert-title{font-size:.85rem;color:var(--accent);font-weight:600;margin-bottom:10px}
.expert-desc{font-size:.88rem;color:var(--text-muted);line-height:1.6;margin-bottom:14px}
.expert-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-bottom:14px}
.expert-actions{display:flex;gap:8px;justify-content:center}

/* ===================================================
   评价卡片
   =================================================== */
.review-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.review-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--card-shadow);border-left:4px solid var(--accent);transition:all var(--transition)}
.review-card:hover{transform:translateY(-3px);box-shadow:var(--card-hover)}
.review-stars{color:var(--accent);font-size:1rem;margin-bottom:10px;letter-spacing:2px}
.review-text{font-size:.95rem;color:var(--text-main);line-height:1.7;margin-bottom:16px;font-style:italic}
.review-author{display:flex;align-items:center;gap:12px}
.review-author img{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid var(--accent)}
.review-author-info .name{font-weight:700;font-size:.95rem;color:var(--primary)}
.review-author-info .date{font-size:.8rem;color:var(--text-muted)}

/* ===================================================
   FAQ
   =================================================== */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:all var(--transition)}
.faq-item.active{border-color:var(--accent);box-shadow:0 4px 16px rgba(232,160,32,0.12)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;cursor:pointer;font-weight:600;color:var(--primary);font-size:.97rem;transition:background var(--transition)}
.faq-question:hover{background:var(--bg-light)}
.faq-item.active .faq-question{background:rgba(232,160,32,0.06);color:var(--accent)}
.faq-icon{width:24px;height:24px;border-radius:50%;background:var(--bg-light);display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all var(--transition)}
.faq-item.active .faq-icon{background:var(--accent);transform:rotate(45deg)}
.faq-icon svg{width:14px;height:14px;fill:var(--text-muted)}
.faq-item.active .faq-icon svg{fill:#fff}
.faq-answer{display:none;padding:0 22px 18px;font-size:.93rem;color:var(--text-muted);line-height:1.75}
.faq-item.active .faq-answer{display:block}

/* ===================================================
   合作品牌墙
   =================================================== */
.partner-wall{display:flex;flex-wrap:wrap;gap:20px;justify-content:center;align-items:center}
.partner-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px 28px;font-size:.95rem;font-weight:700;color:var(--text-muted);transition:all var(--transition);min-width:120px;text-align:center}
.partner-item:hover{border-color:var(--accent);color:var(--primary);box-shadow:0 4px 16px rgba(232,160,32,0.15)}

/* ===================================================
   联系与二维码
   =================================================== */
.contact-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:28px}
.contact-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--card-shadow);text-align:center;transition:all var(--transition)}
.contact-card:hover{transform:translateY(-4px);box-shadow:var(--card-hover)}
.contact-icon{width:60px;height:60px;border-radius:50%;background:rgba(13,43,78,0.06);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:1.6rem}
.qr-code{width:140px;height:140px;margin:0 auto 12px;border:3px solid var(--border);border-radius:var(--radius);padding:6px;background:#fff}
.qr-code canvas,.qr-code img{width:100%;height:100%}

/* ===================================================
   AI功能模块
   =================================================== */
.ai-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:24px}
.ai-card{background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-mid) 100%);border-radius:var(--radius-lg);padding:28px;color:#fff;transition:all var(--transition);border:1px solid rgba(255,255,255,0.06)}
.ai-card:hover{transform:translateY(-5px);box-shadow:0 12px 40px rgba(10,22,40,0.4)}
.ai-card-icon{font-size:2.2rem;margin-bottom:16px}
.ai-card h4{color:#fff;margin-bottom:10px}
.ai-card p{color:rgba(255,255,255,0.7);font-size:.9rem;line-height:1.65}

/* ===================================================
   社区功能
   =================================================== */
.community-features{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:20px}
.community-card{background:#fff;border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--card-shadow);transition:all var(--transition);border-bottom:3px solid transparent}
.community-card:hover{border-bottom-color:var(--accent);transform:translateY(-4px)}
.community-card-icon{font-size:2rem;margin-bottom:12px}
.community-card h4{font-size:.97rem;color:var(--primary);margin-bottom:6px}
.community-card p{font-size:.83rem;color:var(--text-muted)}

/* ===================================================
   How-To步骤
   =================================================== */
.steps{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:24px;counter-reset:step}
.step-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--card-shadow);position:relative;counter-increment:step;transition:all var(--transition)}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--card-hover)}
.step-num{width:44px;height:44px;border-radius:50%;background:var(--accent);color:#fff;font-size:1.1rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.step-card h4{font-size:1rem;color:var(--primary);margin-bottom:8px}
.step-card p{font-size:.88rem;color:var(--text-muted)}

/* ===================================================
   分享按钮
   =================================================== */
.share-btns{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.share-btn{display:inline-flex;align-items:center;gap:7px;padding:9px 20px;border-radius:50px;font-size:.88rem;font-weight:600;transition:all var(--transition);cursor:pointer}
.share-wechat{background:#07c160;color:#fff}
.share-weibo{background:#e6162d;color:#fff}
.share-douyin{background:#000;color:#fff}
.share-bilibili{background:#00a1d6;color:#fff}
.share-btn:hover{opacity:.88;transform:translateY(-2px)}

/* ===================================================
   页脚
   =================================================== */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.75);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{height:48px;margin-bottom:16px}
.footer-brand p{font-size:.9rem;line-height:1.7;color:rgba(255,255,255,0.6);margin-bottom:16px}
.footer-col h5{font-size:1rem;font-weight:700;color:#fff;margin-bottom:18px;padding-bottom:10px;border-bottom:1px solid rgba(255,255,255,0.1)}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:.88rem;color:rgba(255,255,255,0.6);transition:color var(--transition)}
.footer-links a:hover{color:var(--accent)}
.footer-qr-row{display:flex;gap:24px;flex-wrap:wrap}
.footer-qr-item{text-align:center}
.footer-qr-item img{width:90px;height:90px;border-radius:8px;border:2px solid rgba(255,255,255,0.15);margin-bottom:6px}
.footer-qr-item span{font-size:.78rem;color:rgba(255,255,255,0.55)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:.82rem;color:rgba(255,255,255,0.45)}
.footer-bottom a{color:rgba(255,255,255,0.45);transition:color var(--transition)}
.footer-bottom a:hover{color:var(--accent)}
.footer-icp{display:flex;gap:16px;flex-wrap:wrap}

/* ===================================================
   面包屑
   =================================================== */
.breadcrumb{background:var(--bg-light);padding:12px 0;border-bottom:1px solid var(--border)}
.breadcrumb-list{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-muted);flex-wrap:wrap}
.breadcrumb-list a{color:var(--primary-light);transition:color var(--transition)}
.breadcrumb-list a:hover{color:var(--accent)}
.breadcrumb-list .sep{color:var(--border)}
.breadcrumb-list .current{color:var(--text-main);font-weight:600}

/* ===================================================
   内页Hero
   =================================================== */
.page-hero{background:linear-gradient(135deg,var(--bg-dark) 0%,var(--bg-mid) 100%);padding:56px 0;text-align:center;color:#fff}
.page-hero h1{color:#fff;margin-bottom:12px}
.page-hero p{color:rgba(255,255,255,0.7);font-size:1.05rem}

/* ===================================================
   奖项展示
   =================================================== */
.award-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:28px}
.award-card{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--card-shadow);transition:all var(--transition)}
.award-card:hover{transform:translateY(-5px);box-shadow:var(--card-hover)}
.award-thumb{position:relative;aspect-ratio:16/9;overflow:hidden}
.award-thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
.award-card:hover .award-thumb img{transform:scale(1.05)}
.award-badge{position:absolute;top:12px;right:12px;background:var(--accent);color:#fff;font-size:.75rem;font-weight:700;padding:4px 12px;border-radius:50px}
.award-info{padding:20px}
.award-title{font-size:1.05rem;font-weight:700;color:var(--primary);margin-bottom:6px}
.award-meta{font-size:.83rem;color:var(--text-muted);margin-bottom:12px}
.award-tags{display:flex;gap:6px;flex-wrap:wrap}

/* ===================================================
   工具卡片
   =================================================== */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.tool-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--card-shadow);transition:all var(--transition);border-top:4px solid transparent}
.tool-card:hover{transform:translateY(-5px);box-shadow:var(--card-hover);border-top-color:var(--accent)}
.tool-icon{font-size:2.4rem;margin-bottom:16px}
.tool-card h4{font-size:1.05rem;font-weight:700;color:var(--primary);margin-bottom:8px}
.tool-card p{font-size:.88rem;color:var(--text-muted);line-height:1.65;margin-bottom:14px}

/* ===================================================
   统计数字
   =================================================== */
.stats-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:24px}
.stat-card{background:#fff;border-radius:var(--radius-lg);padding:28px;text-align:center;box-shadow:var(--card-shadow)}
.stat-num{font-size:2.4rem;font-weight:800;color:var(--accent);line-height:1}
.stat-unit{font-size:1rem;color:var(--accent)}
.stat-label{font-size:.88rem;color:var(--text-muted);margin-top:8px}

/* ===================================================
   响应式
   =================================================== */
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .section{padding:48px 0}
  .navbar-nav{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,22,40,0.97);flex-direction:column;align-items:flex-start;padding:80px 24px 40px;gap:0;z-index:999;overflow-y:auto}
  .navbar-nav.open{display:flex}
  .nav-link{font-size:1.1rem;padding:14px 8px;border-bottom:1px solid rgba(255,255,255,0.06);color:#fff;width:100%}
  .nav-link:hover,.nav-link.active{color:var(--accent);background:transparent}
  .dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:rgba(255,255,255,0.04);padding-left:16px}
  .hamburger{display:flex;z-index:1001}
  .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .hamburger.active span:nth-child(2){opacity:0}
  .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .hero{min-height:380px}
  .hero-stats{gap:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .video-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
  .top-bar .top-bar-inner{justify-content:center}
}
@media(max-width:480px){
  .hero h1{font-size:1.6rem}
  .hero-actions{flex-direction:column}
  .btn{justify-content:center}
  .search-bar-inner{flex-direction:column;align-items:stretch}
  .search-hot-tags{display:none}
}

/* ===================================================
   动画
   =================================================== */
@keyframes fadeInUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.fade-in-up{animation:fadeInUp .6s ease both}
.delay-1{animation-delay:.1s}
.delay-2{animation-delay:.2s}
.delay-3{animation-delay:.3s}
@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
.skeleton{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}

/* ===================================================
   滚动条
   =================================================== */
::-webkit-scrollbar{width:6px;height:6px}
::-webkit-scrollbar-track{background:#f0f0f0}
::-webkit-scrollbar-thumb{background:var(--primary-light);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}

/* ===================================================
   视频播放模态框
   =================================================== */
.video-modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.88);z-index:9999;align-items:center;justify-content:center}
.video-modal.active{display:flex}
.video-modal-inner{background:#000;border-radius:var(--radius-lg);overflow:hidden;width:90%;max-width:900px;position:relative}
.video-modal-close{position:absolute;top:12px;right:12px;width:36px;height:36px;background:rgba(255,255,255,0.15);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;font-size:1.2rem;z-index:10;transition:background var(--transition)}
.video-modal-close:hover{background:var(--accent)}
.video-modal video{width:100%;display:block;max-height:80vh}
.video-placeholder{aspect-ratio:16/9;background:var(--bg-dark);display:flex;flex-direction:column;align-items:center;justify-content:center;color:rgba(255,255,255,0.6);gap:12px}
.video-placeholder svg{width:64px;height:64px;fill:rgba(255,255,255,0.3)}

/* ===================================================
   懒加载
   =================================================== */
img[data-src]{opacity:0;transition:opacity .4s}
img.loaded{opacity:1}

/* ===================================================
   通用工具类
   =================================================== */
.d-flex{display:flex}.align-center{align-items:center}.justify-between{justify-content:space-between}.gap-8{gap:8px}.gap-12{gap:12px}.gap-16{gap:16px}.gap-24{gap:24px}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.mt-48{margin-top:48px}
.mb-8{margin-bottom:8px}.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}.mb-32{margin-bottom:32px}
.pt-0{padding-top:0!important}.pb-0{padding-bottom:0!important}
.bg-dark{background:var(--bg-dark)}.bg-mid{background:var(--bg-mid)}.bg-light{background:var(--bg-light)}
.text-white{color:#fff}.text-accent{color:var(--accent)}
.rounded{border-radius:var(--radius)}.rounded-lg{border-radius:var(--radius-lg)}
.overflow-hidden{overflow:hidden}
.w-100{width:100%}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}