/* 完美体育官网 公共样式 - 概率研究报告风格 */
:root{
  --w:1180px;
  --bone:#f7f6f2;
  --ink:#161616;
  --paper:#ffffff;
  --line:#e4e1d8;
  --blue:#1c4e80;
  --blue-soft:#eaf1f8;
  --green:#3f6b4f;
  --green-soft:#eaf2ec;
  --orange:#b05a1e;
  --orange-soft:#faf0e6;
  --purple:#5c4a8a;
  --purple-soft:#f1eef8;
  --sub:#5c5952;
  --muted:#8a8579;
}
*{box-sizing:border-box;}
body{margin:0;background:var(--bone);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei","Source Han Serif SC",serif;line-height:1.8;}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;height:auto;}
.wrap{max-width:var(--w);margin:0 auto;padding:0 22px;}
h1,h2,h3,h4{font-family:"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.5;}

/* Header */
.site-header{background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:80;}
.bar{max-width:var(--w);margin:0 auto;padding:0 22px;display:flex;align-items:center;justify-content:space-between;height:66px;}
.brand{display:flex;align-items:center;gap:8px;font-size:19px;font-weight:700;color:var(--ink);}
.brand img{width:30px;height:30px;}
.brand:hover{text-decoration:none;}
.main-nav ul{display:flex;gap:2px;list-style:none;margin:0;padding:0;flex-wrap:wrap;}
.main-nav a{display:block;padding:9px 12px;font-size:14px;color:var(--sub);border-radius:3px;}
.main-nav a:hover,.main-nav a.active{background:var(--blue-soft);color:var(--blue);text-decoration:none;}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:4px;padding:6px 10px;font-size:20px;cursor:pointer;}
@media(max-width:960px){
  .main-nav{position:fixed;top:66px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:max-height .25s;}
  .main-nav.open{max-height:500px;}
  .main-nav ul{flex-direction:column;padding:8px 16px 16px;}
  .menu-toggle{display:block;}
}

/* Breadcrumb */
.crumb{font-size:13px;color:var(--muted);padding:12px 0;border-bottom:1px solid var(--line);background:var(--paper);}
.crumb a{color:var(--muted);}
.crumb span{margin:0 6px;}

/* Hero split */
.hero{padding:46px 0 40px;background:var(--paper);border-bottom:1px solid var(--line);}
.hero-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;}
@media(max-width:860px){.hero-grid{grid-template-columns:1fr;}}
.hero h1{font-size:27px;margin:0 0 16px;}
.hero p{color:var(--sub);font-size:15px;margin:0 0 20px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;}
.hero-img{max-width:460px;justify-self:end;}

/* Section */
main{padding:40px 0 60px;}
section{margin-bottom:48px;}
.sec-label{display:inline-block;font-size:12px;letter-spacing:.06em;color:var(--blue);background:var(--blue-soft);padding:3px 10px;border-radius:12px;margin-bottom:10px;}
h2.sec-title{font-size:22px;margin:0 0 16px;border-left:4px solid var(--blue);padding-left:12px;}
h3{font-size:17px;color:var(--ink);margin:22px 0 8px;}
p{margin:0 0 14px;}
.lead{color:var(--sub);font-size:15px;}

/* Buttons */
.btn{display:inline-block;background:var(--blue);color:#fff;padding:10px 20px;border-radius:4px;font-size:14px;font-weight:600;}
.btn:hover{background:#153e66;color:#fff;text-decoration:none;}
.btn-outline{display:inline-block;border:1px solid var(--blue);color:var(--blue);padding:9px 19px;border-radius:4px;font-size:14px;font-weight:600;}
.btn-ghost{display:inline-block;border:1px solid var(--line);color:var(--sub);padding:9px 19px;border-radius:4px;font-size:14px;}

/* Cards / grid */
.grid{display:grid;gap:18px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

.card{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:16px;}
.article-card{background:var(--paper);border:1px solid var(--line);border-radius:6px;overflow:hidden;display:flex;flex-direction:column;}
.article-card img{width:100%;}
.article-card .body{padding:16px;}
.article-card .cat{font-size:11px;color:var(--purple);background:var(--purple-soft);padding:2px 9px;border-radius:10px;}
.article-card .date{font-size:12px;color:var(--muted);margin-left:6px;}
.article-card h3{margin:10px 0 8px;font-size:16px;}
.article-card .excerpt{font-size:13px;color:var(--sub);margin-bottom:8px;}
.article-card .preview{font-size:13px;color:#403d38;border-top:1px dashed var(--line);padding-top:10px;margin-top:6px;}
.article-card .readmore{display:inline-block;margin-top:10px;font-size:13px;font-weight:600;}

/* variable box */
.var-box{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:14px;}
.var-box h4{margin:0 0 6px;font-size:14px;color:var(--blue);}
.var-box p{margin:0;font-size:13px;color:var(--sub);}

/* comparison table */
table.data-table{width:100%;border-collapse:collapse;font-size:14px;margin:16px 0;background:var(--paper);}
table.data-table th,table.data-table td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top;}
table.data-table th{background:var(--blue-soft);color:var(--blue);}

/* probability bar */
.prob-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;font-size:13px;}
.prob-row .label{width:70px;flex-shrink:0;}
.prob-track{flex:1;height:16px;background:#eee;border-radius:8px;overflow:hidden;}
.prob-fill{height:100%;}
.prob-fill.a{background:var(--blue);}
.prob-fill.draw{background:var(--muted);}
.prob-fill.b{background:var(--orange);}
.prob-val{width:44px;text-align:right;font-variant-numeric:tabular-nums;}

/* timeline */
.timeline{border-left:2px solid var(--line);margin-left:8px;padding-left:20px;}
.timeline .t-item{position:relative;margin-bottom:20px;}
.timeline .t-item::before{content:"";position:absolute;left:-25px;top:4px;width:9px;height:9px;border-radius:50%;background:var(--blue);}
.timeline .t-date{font-size:12px;color:var(--muted);}
.timeline .t-cat{font-size:12px;color:var(--purple);margin-left:4px;}

/* callout boxes */
.callout{border-left:4px solid var(--orange);background:var(--orange-soft);padding:14px 16px;border-radius:4px;margin:16px 0;font-size:14px;}
.callout.info{border-left-color:var(--blue);background:var(--blue-soft);}
.callout.note{border-left-color:var(--green);background:var(--green-soft);}
.callout h4{margin:0 0 6px;font-size:14px;}

/* model tag */
.tag{display:inline-block;font-size:11px;padding:2px 8px;border-radius:10px;background:var(--purple-soft);color:var(--purple);margin-right:4px;}

/* FAQ */
.faq-item{border-bottom:1px solid var(--line);padding:14px 0;}
.faq-item .q{font-weight:700;margin-bottom:6px;cursor:pointer;display:flex;justify-content:space-between;}
.faq-item .a{color:var(--sub);font-size:14px;display:none;}
.faq-item.open .a{display:block;}
.faq-item .q::after{content:"+";font-size:18px;color:var(--muted);}
.faq-item.open .q::after{content:"−";}

/* article detail */
.article-detail{max-width:820px;}
.article-meta-box{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:14px 16px;font-size:13px;color:var(--sub);margin-bottom:20px;}
.article-meta-box div{margin-bottom:3px;}
.article-detail h2{font-size:20px;margin-top:32px;}
.article-detail h3{font-size:16px;}
.article-detail ul,.article-detail ol{padding-left:22px;}
.article-detail li{margin-bottom:6px;}

/* sidebar */
.layout-2col{display:grid;grid-template-columns:2.3fr 1fr;gap:32px;align-items:start;}
@media(max-width:900px){.layout-2col{grid-template-columns:1fr;}}
.side-box{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:16px;margin-bottom:18px;}
.side-box h4{margin:0 0 10px;font-size:14px;border-bottom:1px solid var(--line);padding-bottom:8px;}
.side-box ul{list-style:none;margin:0;padding:0;font-size:13px;}
.side-box li{margin-bottom:9px;}

/* footer */
.site-footer{background:var(--ink);color:#c9c6bd;padding:40px 0 20px;font-size:13px;}
.footer-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid #333;}
.footer-brand{font-size:18px;color:#fff;font-weight:700;}
.footer-slogan{color:#918d82;font-size:13px;margin-top:4px;}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:20px;}
.footer-grid h5{color:#fff;font-size:14px;margin:0 0 10px;}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin-bottom:6px;}
.footer-grid a{color:#c9c6bd;}
.footer-bottom{color:#847f74;font-size:12px;line-height:1.9;}
@media(max-width:700px){.footer-grid{grid-template-columns:1fr;}}

.back-top{position:fixed;right:20px;bottom:20px;background:var(--paper);border:1px solid var(--line);border-radius:50%;width:42px;height:42px;display:none;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.1);cursor:pointer;font-size:18px;color:var(--blue);}
.back-top.show{display:flex;}