/* ====== base ====== */
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:#0f172a;background:#f4f7fb;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}

:root{
  --primary:#53a8d7;
  --primary-dark:#2f7eaa;
  --primary-deep:#1e5a82;
  --accent:#ee3a6a;
  --bg:#f4f7fb;
  --bg-soft:#eef3f8;
  --card:#ffffff;
  --text:#0f172a;
  --text-soft:#475569;
  --text-mute:#94a3b8;
  --line:#e2e8f0;
  --shadow:0 6px 24px rgba(15,23,42,.06);
  --shadow-hover:0 10px 30px rgba(15,23,42,.10);
  --radius:10px;
  --max-w:1180px;
}

/* ====== 顶部欢迎条 ====== */
.bar-top{background:#f1f5f9;border-bottom:1px solid var(--line);font-size:12.5px;color:#64748b}
.bar-top .inner{max-width:var(--max-w);margin:0 auto;padding:7px 24px;display:flex;justify-content:space-between;align-items:center}
.bar-top a{color:#53a8d7;margin-left:14px}
.bar-top a:hover{text-decoration:underline}

/* ====== 主头部 ====== */
.header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.header .inner{max-width:var(--max-w);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:32px}
.brand{display:flex;align-items:center;gap:14px;flex-shrink:0}
.brand .logo{width:180px;height:48px}
.brand .company-name{font-size:13px;color:#64748b;border-left:1px solid var(--line);padding-left:14px;line-height:1.45;max-width:260px}
.brand .company-name b{color:#0f172a;font-weight:600;display:block;font-size:13.5px}

.nav{flex:1;display:flex;justify-content:center;gap:6px;flex-wrap:wrap}
.nav a{padding:10px 16px;font-size:15px;color:#334155;border-radius:6px;position:relative}
.nav a:hover{color:#1e5a82;background:#f0f7fc}
.nav a.active{color:#1e5a82;font-weight:600}
.nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:4px;height:2px;background:#53a8d7;border-radius:2px}

.user-box{display:flex;align-items:center;gap:8px;flex-shrink:0}
.user-box a{padding:8px 14px;border-radius:6px;font-size:14px}
.btn-login{color:#1e5a82;border:1px solid #53a8d7}
.btn-login:hover{background:#eaf5fb}
.btn-register{background:#53a8d7;color:#fff}
.btn-register:hover{background:#2f7eaa}
.user-chip{font-size:13.5px;color:#334155;background:#f1f5f9;padding:6px 12px;border-radius:20px;display:flex;align-items:center;gap:6px}
.user-chip b{color:#0f172a;font-weight:600}
.user-chip a{font-size:12.5px;color:#53a8d7;padding:0;margin-left:4px}

/* ====== Banner ====== */
.banner{position:relative;height:340px;overflow:hidden;background:linear-gradient(135deg,#2f7eaa 0%,#1e5a82 60%,#163f5b 100%)}
.banner .bg{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,1fr);opacity:.25}
.banner .bg div{background-size:cover;background-position:center}
.banner .overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.10) 0%,rgba(15,23,42,.55) 100%)}
.banner .txt{position:relative;max-width:var(--max-w);margin:0 auto;padding:0 24px;height:100%;display:flex;flex-direction:column;justify-content:center;color:#fff}
.banner h1{font-size:34px;font-weight:700;letter-spacing:1px;text-shadow:0 2px 8px rgba(0,0,0,.25)}
.banner p{font-size:15.5px;margin-top:14px;color:#dbeafe;max-width:640px;line-height:1.85}
.banner .meta{margin-top:18px;font-size:13px;color:#cbd5e1;display:flex;gap:22px;flex-wrap:wrap}
.banner .meta span::before{content:"";display:inline-block;width:6px;height:6px;background:#fbbf24;border-radius:50%;margin-right:8px;vertical-align:middle}

/* ====== 区块通用 ====== */
.section{max-width:var(--max-w);margin:48px auto;padding:0 24px}
.section .head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.section .head h2{font-size:22px;font-weight:700;color:#0f172a;display:flex;align-items:center;gap:12px}
.section .head h2::before{content:"";width:4px;height:20px;background:#53a8d7;border-radius:2px}
.section .head .more{font-size:13.5px;color:#53a8d7}
.section .head .more:hover{text-decoration:underline}

/* ====== 直播卡片 ====== */
.grid-live{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card-live{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s;cursor:pointer}
.card-live:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.card-live .cover{position:relative;aspect-ratio:3/4;background:#000;overflow:hidden}
.card-live .cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.card-live:hover .cover img{transform:scale(1.05)}
.card-live .cover .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(15,23,42,0);transition:background .25s}
.card-live:hover .cover .play{background:rgba(15,23,42,.18)}
.card-live .play svg{width:64px;height:64px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.card-live .rank{position:absolute;left:12px;top:12px;width:30px;height:30px;background:linear-gradient(135deg,#ef4444,#dc2626);color:#fff;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;border-radius:6px}
.card-live .meta{position:absolute;right:12px;bottom:12px;background:rgba(15,23,42,.7);color:#fff;font-size:12px;padding:3px 8px;border-radius:4px}
.card-live .body{padding:18px 20px 20px}
.card-live .body h3{font-size:16.5px;font-weight:600;color:#0f172a;margin-bottom:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.card-live .body p{font-size:13px;color:#64748b;display:flex;justify-content:space-between}
.card-live .body p .tag{background:#eaf5fb;color:#1e5a82;padding:1px 8px;border-radius:4px;font-size:12px}

/* ====== 列表条目（适用于协议页） ====== */
.list-item{background:#fff;border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);margin-bottom:16px;display:flex;align-items:center;gap:18px;cursor:pointer;transition:transform .2s,box-shadow .2s}
.list-item:hover{transform:translateX(4px);box-shadow:var(--shadow-hover)}
.list-item .num{width:36px;height:36px;background:#eaf5fb;color:#1e5a82;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.list-item .body{flex:1;min-width:0}
.list-item h3{font-size:16px;color:#0f172a;margin-bottom:4px}
.list-item .sub{font-size:13px;color:#64748b}
.list-item .arrow{color:#94a3b8;font-size:18px}

/* ====== 播放页 ====== */
.player-wrap{max-width:920px;margin:32px auto;padding:0 24px}
.player-box{background:#000;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:9/16;max-height:80vh;margin:0 auto}
.player-box video{width:100%;height:100%;object-fit:contain;background:#000}
.player-info{max-width:920px;margin:24px auto;padding:0 24px}
.player-info h1{font-size:24px;font-weight:700;color:#0f172a;margin-bottom:10px}
.player-info .row{display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;color:#64748b;margin-bottom:18px}
.player-info .row span::before{content:"";display:inline-block;width:5px;height:5px;background:#53a8d7;border-radius:50%;margin-right:6px;vertical-align:middle}
.player-info .desc{background:#fff;padding:18px 22px;border-radius:var(--radius);box-shadow:var(--shadow);color:#475569;line-height:1.85}

/* ====== 表单 ====== */
.form-card{max-width:440px;margin:60px auto;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:36px 40px}
.form-card h2{font-size:22px;font-weight:700;margin-bottom:6px;color:#0f172a}
.form-card .sub{font-size:13.5px;color:#64748b;margin-bottom:24px}
.form-card label{font-size:13.5px;color:#475569;display:block;margin-bottom:6px}
.form-card input[type=text],.form-card input[type=password]{width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:6px;font-size:14px;margin-bottom:16px;outline:none;transition:border-color .2s}
.form-card input:focus{border-color:#53a8d7}
.form-card .agree{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:#475569;margin-bottom:18px;line-height:1.7}
.form-card .agree input{margin-top:3px;flex-shrink:0}
.form-card .agree a{color:#53a8d7}
.form-card .agree a:hover{text-decoration:underline}
.form-card .btn-primary{width:100%;padding:12px;background:#53a8d7;color:#fff;border-radius:6px;font-size:15px;font-weight:600;transition:background .2s}
.form-card .btn-primary:hover{background:#2f7eaa}
.form-card .btn-primary:disabled{background:#cbd5e1;cursor:not-allowed}
.form-card .foot{text-align:center;margin-top:18px;font-size:13.5px;color:#64748b}
.form-card .foot a{color:#53a8d7}
.form-card .err{color:#dc2626;font-size:12.5px;margin-top:-10px;margin-bottom:12px;min-height:14px}

/* ====== 协议页内容 ====== */
.article{max-width:880px;margin:0 auto;padding:48px 24px}
.article h1{font-size:26px;font-weight:700;margin-bottom:6px;color:#0f172a}
.article .meta-line{color:#94a3b8;font-size:13px;margin-bottom:28px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article h2{font-size:17px;font-weight:600;color:#1e5a82;margin:24px 0 10px;padding-left:10px;border-left:3px solid #53a8d7}
.article p{font-size:14.5px;color:#334155;line-height:1.9;margin-bottom:12px}
.article ol,.article ul{padding-left:24px;margin-bottom:12px;color:#334155;font-size:14.5px;line-height:1.9}

/* ====== 底部 ====== */
.footer{background:#1e293b;color:#cbd5e1;padding:36px 24px 28px;margin-top:60px;font-size:13.5px;line-height:2}
.footer .inner{max-width:var(--max-w);margin:0 auto}
.footer .links{text-align:center;margin-bottom:14px}
.footer .links a{color:#93c5fd;text-decoration:underline;margin:0 6px}
.footer .links a:hover{color:#fff}
.footer p{text-align:center;color:#cbd5e1;margin:6px 0}
.footer p a{color:#93c5fd}
.footer p .sep{display:inline-block;margin:0 6px;color:#64748b}
.footer .copyright{color:#94a3b8;font-size:12.5px;margin-top:8px}
.footer .icp{display:inline-block;width:14px;height:14px;vertical-align:middle;margin-right:4px}

/* ====== 通用工具 ====== */
.muted{color:#94a3b8}
.flex{display:flex}

/* ====== 响应式 ====== */
@media (max-width:960px){
  .grid-live{grid-template-columns:repeat(2,1fr)}
  .header .inner{flex-wrap:wrap;gap:14px}
  .nav{order:3;width:100%;justify-content:flex-start;overflow-x:auto}
  .brand .company-name{display:none}
  .banner{height:280px}
  .banner h1{font-size:24px}
}
@media (max-width:640px){
  .grid-live{grid-template-columns:1fr}
  .bar-top .inner{flex-direction:column;gap:4px;padding:6px 14px}
  .header .inner{padding:10px 14px}
  .form-card{margin:30px 14px;padding:28px 22px}
  .banner{height:240px}
  .banner h1{font-size:20px}
  .banner p{font-size:13.5px}
  .footer{padding:28px 16px}
}