/* ============================================
   高清视频 高清视频视频社区 - 原创样式表
   配色方案：深碳灰 #1a1d23 / 高清视频红 #e63946 / 钢铁蓝 #457b9d / 浅银 #f1f3f5
   ============================================ */

/* === 基础重置 === */
*,*::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:#e8e8e8;background:#12141a;line-height:1.7}
a{color:#e63946;text-decoration:none;transition:color .25s}
a:hover{color:#ff6b6b}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}

/* === 容器 === */
.wr{max-width:1280px;margin:0 auto;padding:0 20px}

/* === 头部导航 === */
.tp-bar{position:fixed;top:0;left:0;width:100%;background:rgba(18,20,26,.95);backdrop-filter:blur(12px);z-index:1000;border-bottom:1px solid rgba(230,57,70,.3);transition:background .3s}
.tp-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1280px;margin:0 auto;padding:0 20px}
.tp-logo{display:flex;align-items:center;gap:10px}
.tp-logo img{height:42px;width:auto}
.tp-logo span{font-size:22px;font-weight:700;color:#fff;letter-spacing:1px}
.tp-nav{display:flex;gap:28px;align-items:center}
.tp-nav a{color:#ccc;font-size:15px;font-weight:500;padding:6px 0;position:relative;transition:color .25s}
.tp-nav a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:#e63946;transition:width .3s}
.tp-nav a:hover,.tp-nav a.cur{color:#fff}
.tp-nav a:hover::after,.tp-nav a.cur::after{width:100%}
.mb-btn{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.mb-btn i{width:24px;height:2px;background:#fff;border-radius:2px;transition:transform .3s}

/* === 搜索框 === */
.sk-wrap{background:#1a1d23;padding:12px 0;border-bottom:1px solid #2a2d35}
.sk-box{max-width:640px;margin:0 auto;display:flex;gap:0;padding:0 20px}
.sk-box input{flex:1;height:42px;border:2px solid #333;border-right:none;border-radius:6px 0 0 6px;background:#0d0f14;color:#fff;padding:0 16px;font-size:14px;outline:none;transition:border-color .3s}
.sk-box input:focus{border-color:#e63946}
.sk-box button{height:42px;padding:0 24px;background:#e63946;color:#fff;border:none;border-radius:0 6px 6px 0;font-size:14px;cursor:pointer;transition:background .3s}
.sk-box button:hover{background:#c1121f}

/* === 横幅 === */
.hb-zone{position:relative;height:520px;overflow:hidden;margin-top:68px}
.hb-zone img{width:100%;height:100%;object-fit:cover}
.hb-mask{position:absolute;inset:0;background:linear-gradient(135deg,rgba(18,20,26,.85) 0%,rgba(18,20,26,.4) 50%,rgba(230,57,70,.15) 100%);display:flex;align-items:center}
.hb-txt{max-width:680px;padding:0 40px}
.hb-txt h1{font-size:42px;font-weight:800;color:#fff;margin-bottom:16px;line-height:1.3}
.hb-txt h1 em{color:#e63946;font-style:normal}
.hb-txt p{font-size:17px;color:#bbb;margin-bottom:28px;line-height:1.8}
.hb-txt .hb-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn-r{display:inline-block;padding:12px 32px;background:#e63946;color:#fff;border-radius:6px;font-weight:600;font-size:15px;transition:all .3s;border:2px solid #e63946}
.btn-r:hover{background:#c1121f;border-color:#c1121f;color:#fff}
.btn-g{display:inline-block;padding:12px 32px;background:transparent;color:#fff;border:2px solid #457b9d;border-radius:6px;font-weight:600;font-size:15px;transition:all .3s}
.btn-g:hover{background:#457b9d;color:#fff}

/* === 数据条 === */
.dt-bar{background:#1a1d23;padding:20px 0;border-bottom:1px solid #2a2d35}
.dt-row{display:flex;justify-content:space-around;flex-wrap:wrap;gap:16px}
.dt-it{text-align:center;padding:8px 20px}
.dt-it strong{display:block;font-size:28px;color:#e63946;font-weight:800}
.dt-it span{font-size:13px;color:#888}

/* === 通用区块 === */
.sc{padding:60px 0}
.sc-dk{background:#12141a}
.sc-lt{background:#1a1d23}
.sc-hd{text-align:center;margin-bottom:40px}
.sc-hd h2{font-size:30px;font-weight:700;color:#fff;margin-bottom:10px}
.sc-hd h2 em{color:#e63946;font-style:normal}
.sc-hd p{font-size:15px;color:#888;max-width:600px;margin:0 auto}

/* === 视频卡片网格 === */
.vg{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.vc{background:#1e2028;border-radius:10px;overflow:hidden;transition:transform .3s,box-shadow .3s;cursor:pointer;position:relative}
.vc:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(230,57,70,.2)}
.vc-img{position:relative;overflow:hidden;aspect-ratio:4/3}
.vc-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.vc:hover .vc-img img{transform:scale(1.08)}
.vc-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.4);opacity:0;transition:opacity .3s}
.vc:hover .vc-play{opacity:1}
.vc-play i{width:56px;height:56px;background:rgba(230,57,70,.9);border-radius:50%;display:flex;align-items:center;justify-content:center}
.vc-play i::after{content:'';border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.vc-dur{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;font-size:12px;padding:2px 8px;border-radius:4px}
.vc-bd{padding:14px}
.vc-bd h3{font-size:15px;color:#e8e8e8;font-weight:600;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.5}
.vc-mt{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#777}
.vc-mt span{display:flex;align-items:center;gap:4px}

/* === 专家卡片 === */
.eg{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.ec{background:#1e2028;border-radius:10px;padding:28px 20px;text-align:center;transition:transform .3s,box-shadow .3s}
.ec:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(230,57,70,.15)}
.ec img{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid #e63946}
.ec h4{font-size:17px;color:#fff;margin-bottom:4px}
.ec .ec-role{font-size:13px;color:#e63946;margin-bottom:10px}
.ec p{font-size:13px;color:#888;line-height:1.6;margin-bottom:14px}
.ec .ec-acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.ec .ec-acts a{padding:6px 14px;font-size:12px;border-radius:4px}

/* === FAQ === */
.fq-ls{max-width:800px;margin:0 auto}
.fq-it{background:#1e2028;border-radius:8px;margin-bottom:12px;overflow:hidden;border:1px solid #2a2d35}
.fq-q{padding:18px 20px;font-size:15px;color:#e8e8e8;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;transition:background .3s}
.fq-q:hover{background:#252830}
.fq-q::after{content:'+';font-size:22px;color:#e63946;transition:transform .3s}
.fq-it.open .fq-q::after{transform:rotate(45deg)}
.fq-a{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 20px}
.fq-it.open .fq-a{max-height:300px;padding:0 20px 18px}
.fq-a p{font-size:14px;color:#999;line-height:1.8}

/* === 评论 === */
.rv-ls{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.rv-it{background:#1e2028;border-radius:10px;padding:24px;border:1px solid #2a2d35}
.rv-tp{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.rv-tp img{width:48px;height:48px;border-radius:50%;object-fit:cover}
.rv-tp .rv-nm{font-size:15px;color:#fff;font-weight:600}
.rv-tp .rv-dt{font-size:12px;color:#777}
.rv-stars{color:#e63946;font-size:14px;margin-bottom:8px;letter-spacing:2px}
.rv-it p{font-size:14px;color:#aaa;line-height:1.7}

/* === 品牌墙 === */
.bw-row{display:flex;flex-wrap:wrap;justify-content:center;gap:30px;align-items:center}
.bw-it{background:#1e2028;padding:16px 28px;border-radius:8px;font-size:16px;color:#888;font-weight:700;border:1px solid #2a2d35;transition:all .3s}
.bw-it:hover{border-color:#e63946;color:#e63946}

/* === HowTo === */
.ht-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ht-cd{background:#1e2028;border-radius:10px;padding:28px 20px;text-align:center;border:1px solid #2a2d35;transition:transform .3s}
.ht-cd:hover{transform:translateY(-4px);border-color:#e63946}
.ht-no{width:48px;height:48px;background:#e63946;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin:0 auto 14px}
.ht-cd h4{font-size:16px;color:#fff;margin-bottom:8px}
.ht-cd p{font-size:13px;color:#888;line-height:1.6}

/* === 联系我们 === */
.ct-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ct-cd{background:#1e2028;border-radius:10px;padding:28px;text-align:center;border:1px solid #2a2d35}
.ct-cd h4{font-size:17px;color:#fff;margin-bottom:12px}
.ct-cd p{font-size:14px;color:#888;line-height:1.8}
.ct-cd img{max-width:160px;margin:12px auto 0;border-radius:8px}

/* === 分享按钮 === */
.sh-row{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;padding:20px 0}
.sh-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;border-radius:6px;font-size:14px;color:#fff;font-weight:500;transition:opacity .3s}
.sh-btn:hover{opacity:.85;color:#fff}
.sh-wx{background:#07c160}
.sh-wb{background:#e6162d}
.sh-dy{background:#161823}
.sh-bl{background:#00a1d6}

/* === 页脚 === */
.ft-zone{background:#0d0f14;padding:48px 0 0;border-top:1px solid #1e2028}
.ft-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.ft-col h4{font-size:16px;color:#fff;margin-bottom:16px;font-weight:700}
.ft-col p,.ft-col a{font-size:13px;color:#777;line-height:2}
.ft-col a:hover{color:#e63946}
.ft-col .ft-logo{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.ft-col .ft-logo img{height:36px}
.ft-col .ft-logo span{font-size:18px;color:#fff;font-weight:700}
.ft-qr{display:flex;gap:20px;margin-top:12px}
.ft-qr div{text-align:center}
.ft-qr img{width:100px;border-radius:6px}
.ft-qr span{display:block;font-size:11px;color:#666;margin-top:4px}
.ft-bot{border-top:1px solid #1e2028;padding:20px 0;text-align:center}
.ft-bot p{font-size:12px;color:#555}

/* === 面包屑 === */
.bc-bar{padding:14px 0;font-size:13px;color:#777}
.bc-bar a{color:#888}
.bc-bar a:hover{color:#e63946}
.bc-bar span{color:#555;margin:0 6px}

/* === 内页头部 === */
.pg-hd{background:linear-gradient(135deg,#1a1d23 0%,#12141a 100%);padding:48px 0 36px;margin-top:68px;border-bottom:1px solid #2a2d35}
.pg-hd h1{font-size:32px;color:#fff;font-weight:700;margin-bottom:8px}
.pg-hd h1 em{color:#e63946;font-style:normal}
.pg-hd p{font-size:15px;color:#888}

/* === 特色卡片 === */
.ft-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ft-cd{background:#1e2028;border-radius:10px;padding:28px;border:1px solid #2a2d35;transition:all .3s}
.ft-cd:hover{border-color:#e63946;transform:translateY(-4px)}
.ft-cd h4{font-size:17px;color:#fff;margin-bottom:10px}
.ft-cd p{font-size:14px;color:#888;line-height:1.7}

/* === 视频播放器 === */
.vp-wrap{background:#000;border-radius:10px;overflow:hidden;aspect-ratio:16/9;margin-bottom:24px;display:flex;align-items:center;justify-content:center}
.vp-wrap video{width:100%;height:100%}
.vp-info{padding:0 0 40px}
.vp-info h1{font-size:24px;color:#fff;margin-bottom:12px}
.vp-info .vp-meta{display:flex;gap:20px;font-size:13px;color:#888;margin-bottom:16px;flex-wrap:wrap}
.vp-info .vp-desc{font-size:14px;color:#aaa;line-height:1.8;background:#1e2028;padding:20px;border-radius:8px}

/* === 响应式 === */
@media(max-width:1024px){
.vg{grid-template-columns:repeat(3,1fr)}
.eg{grid-template-columns:repeat(2,1fr)}
.ft-grid{grid-template-columns:repeat(2,1fr)}
.ht-row{grid-template-columns:repeat(2,1fr)}
.ct-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
.tp-nav{display:none;position:fixed;top:68px;left:0;width:100%;background:#12141a;flex-direction:column;padding:20px;gap:16px;border-top:1px solid #2a2d35}
.tp-nav.show{display:flex}
.mb-btn{display:flex}
.hb-zone{height:400px}
.hb-txt h1{font-size:28px}
.vg{grid-template-columns:repeat(2,1fr)}
.eg{grid-template-columns:1fr}
.rv-ls{grid-template-columns:1fr}
.ft-grid{grid-template-columns:1fr}
.ht-row{grid-template-columns:1fr}
.ct-grid{grid-template-columns:1fr}
.ft-cards{grid-template-columns:1fr}
.dt-row{gap:8px}
.dt-it strong{font-size:22px}
}
@media(max-width:480px){
.vg{grid-template-columns:1fr}
.hb-zone{height:320px}
.hb-txt h1{font-size:22px}
.hb-txt p{font-size:14px}
.sc{padding:40px 0}
.sc-hd h2{font-size:24px}
}