/* BB体育 - 全站共享样式 */
:root{
  --bb-blue:#0b3d91;
  --bb-blue-dark:#082a66;
  --bb-orange:#ff6a13;
  --bb-bg:#f6f8fb;
  --bb-text:#1c2530;
  --bb-muted:#5b6472;
  --bb-border:#e2e6ed;
  --bb-white:#ffffff;
  --bb-radius:10px;
  --bb-maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--bb-text);
  background:var(--bb-bg);
  line-height:1.75;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--bb-blue);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--bb-maxw);margin:0 auto;padding:0 20px}

/* Header */
.site-header{background:var(--bb-white);border-bottom:1px solid var(--bb-border);position:sticky;top:0;z-index:50}
.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--bb-blue)}
.brand img{width:36px;height:36px}
.main-nav ul{list-style:none;display:flex;gap:22px;margin:0;padding:0;flex-wrap:wrap}
.main-nav a{color:var(--bb-text);font-weight:500;font-size:15px}
.main-nav a:hover{color:var(--bb-orange);text-decoration:none}
.nav-toggle{display:none;background:none;border:1px solid var(--bb-border);border-radius:8px;padding:6px 10px;font-size:14px}

/* Hero */
.hero{background:linear-gradient(135deg,var(--bb-blue),var(--bb-blue-dark));color:#fff;padding:52px 0}
.hero .container{display:flex;align-items:center;gap:36px;flex-wrap:wrap}
.hero-text{flex:1 1 380px}
.hero-text h1{font-size:32px;margin:0 0 14px;line-height:1.4}
.hero-text p{font-size:16px;color:#dbe4f7;max-width:56ch}
.hero-image{flex:1 1 320px;max-width:480px}
.badge{display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.35);border-radius:999px;padding:4px 14px;font-size:13px;margin-bottom:14px}

/* Notice / disclaimer */
.notice{background:#fff4e8;border:1px solid #ffd8ad;border-left:4px solid var(--bb-orange);border-radius:8px;padding:14px 18px;font-size:14px;color:#7a4a12;margin:20px 0}
.notice strong{color:#5a3300}

/* Sections */
section{padding:40px 0}
.section-title{font-size:24px;margin:0 0 8px}
.section-sub{color:var(--bb-muted);margin:0 0 26px;font-size:15px}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:var(--bb-white);border:1px solid var(--bb-border);border-radius:var(--bb-radius);overflow:hidden;display:flex;flex-direction:column}
.card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.card-body{padding:16px 18px 20px}
.card-tag{display:inline-block;font-size:12px;color:var(--bb-orange);font-weight:700;margin-bottom:6px}
.card h3{margin:0 0 8px;font-size:17px;line-height:1.5}
.card h3 a{color:var(--bb-text)}
.card p{color:var(--bb-muted);font-size:14px;margin:0 0 10px}
.card .read-more{font-size:14px;font-weight:600}

/* Article page */
.article-wrap{max-width:780px;margin:0 auto;padding:30px 20px 60px}
.breadcrumb{font-size:13px;color:var(--bb-muted);margin-bottom:16px}
.breadcrumb a{color:var(--bb-muted)}
.article-meta{font-size:13px;color:var(--bb-muted);margin:6px 0 20px;display:flex;gap:14px;flex-wrap:wrap}
.article-wrap h1{font-size:28px;line-height:1.4;margin:0 0 10px}
.article-wrap h2{font-size:21px;margin:34px 0 12px}
.article-wrap h3{font-size:17px;margin:24px 0 10px}
.article-wrap p{font-size:16px;margin:0 0 16px}
.article-wrap ul,.article-wrap ol{font-size:16px;margin:0 0 16px;padding-left:22px}
.article-wrap li{margin-bottom:6px}
.cover-img{border-radius:var(--bb-radius);margin-bottom:24px}
.related{margin-top:44px;padding-top:24px;border-top:1px solid var(--bb-border)}
.related h2{font-size:19px;margin:0 0 14px}
.related ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.related a{font-weight:600}
.back-links{margin-top:30px;font-size:14px}
.back-links a{margin-right:16px}

/* Table */
table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:15px}
table th,table td{border:1px solid var(--bb-border);padding:8px 10px;text-align:left}
table th{background:#eef2f8}

/* Forms */
.demo-form{background:var(--bb-white);border:1px solid var(--bb-border);border-radius:var(--bb-radius);padding:24px;max-width:560px}
.demo-form label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}
.demo-form input,.demo-form textarea{width:100%;padding:10px 12px;border:1px solid var(--bb-border);border-radius:8px;font-size:14px;font-family:inherit}
.demo-form button{margin-top:18px;background:var(--bb-blue);color:#fff;border:none;padding:10px 22px;border-radius:8px;font-size:15px;cursor:pointer}
.demo-form button:disabled{background:#9aa8bd;cursor:not-allowed}
.form-note{font-size:13px;color:var(--bb-muted);margin-top:10px}

/* FAQ */
.faq-item{border-bottom:1px solid var(--bb-border);padding:16px 0}
.faq-item h3{margin:0 0 8px;font-size:16px}
.faq-item p{margin:0;color:var(--bb-muted)}

/* Footer */
.site-footer{background:#0e1420;color:#b8c1d1;padding:36px 0 20px;margin-top:40px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:24px;margin-bottom:24px}
.footer-grid h4{color:#fff;font-size:14px;margin:0 0 12px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:8px}
.footer-grid a{color:#b8c1d1}
.footer-bottom{border-top:1px solid #263041;padding-top:16px;font-size:12px;color:#7c8797}

@media (max-width:760px){
  .main-nav{display:none}
  .nav-toggle{display:inline-block}
  .main-nav.open{display:block;width:100%;order:3}
  .main-nav.open ul{flex-direction:column;gap:0;padding:10px 0}
  .main-nav.open li{padding:8px 0;border-top:1px solid var(--bb-border)}
  .hero-text h1{font-size:26px}
}