/* 开云体育官网 style.css */
:root{
  --bg:#f7f5f0;
  --navy:#14324e;
  --navy-dark:#0c2135;
  --graphite:#4b5359;
  --pitch:#5f7f5c;
  --pitch-light:#eef2ea;
  --energy:#c98a1f;
  --equip:#c15f2c;
  --twin:#5f4f8c;
  --text:#1c2226;
  --muted:#5b6570;
  --border:#ddd9d0;
  --card:#ffffff;
  --maxw:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:15px;overflow-x:hidden}
a{color:var(--navy);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block;height:auto}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
main{overflow-x:hidden}

/* header */
header.site-header{background:var(--navy-dark);color:#fff;position:sticky;top:0;z-index:50;border-bottom:3px solid var(--pitch)}
.top-bar{display:flex;justify-content:space-between;align-items:center;max-width:var(--maxw);margin:0 auto;padding:12px 20px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:20px;font-weight:700}
.brand img{width:34px;height:34px}
.brand small{display:block;font-size:11px;font-weight:400;color:#b9c6d1}
.menu-toggle{display:none;background:none;border:1px solid #3a5670;color:#fff;font-size:20px;padding:4px 10px;border-radius:6px;cursor:pointer}
nav.main-nav{background:var(--navy)}
nav.main-nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:2px;margin:0;padding:0 20px;max-width:var(--maxw);margin:0 auto}
nav.main-nav a{display:block;color:#eef2f5;padding:12px 14px;font-size:14px;white-space:nowrap}
nav.main-nav a:hover,nav.main-nav a.active{background:var(--navy-dark);text-decoration:none;color:#fff}
@media(max-width:920px){
  .menu-toggle{display:inline-block}
  nav.main-nav{display:none}
  nav.main-nav.open{display:block}
  nav.main-nav ul{flex-direction:column;padding:8px 12px}
}

/* breadcrumb */
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 0 0}
.breadcrumb a{color:var(--muted)}

/* hero */
.hero{padding:26px 0 10px}
h1{font-size:27px;line-height:1.4;margin:10px 0 14px;color:var(--navy-dark)}
h2{font-size:21px;margin:38px 0 12px;color:var(--navy-dark);border-left:4px solid var(--pitch);padding-left:12px}
h3{font-size:17px;margin:22px 0 8px;color:var(--text)}
p{margin:0 0 14px}
.lede{font-size:16px;color:#33393d;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px 20px}
.section-note{font-size:13px;color:var(--muted);background:#fbf9f5;border:1px dashed var(--border);border-radius:8px;padding:10px 14px;margin:14px 0}

/* grids/cards */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-6{grid-template-columns:repeat(6,1fr)}
@media(max-width:900px){.grid-3,.grid-2{grid-template-columns:1fr}.grid-6{grid-template-columns:repeat(2,1fr)}}
.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px 18px}
.card h3{margin-top:0}
.card img{border-radius:6px;margin-bottom:10px;background:var(--pitch-light)}
.tag{display:inline-block;background:var(--pitch-light);color:#335130;font-size:12px;padding:2px 10px;border-radius:12px;margin-bottom:8px}
.tag.energy{background:#fbf0dc;color:#7a5416}
.tag.equip{background:#fbe6da;color:#8a3f18}
.tag.twin{background:#eae6f4;color:#453a6b}

/* article preview list */
.article-list{display:flex;flex-direction:column;gap:16px}
.article-item{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px 18px;display:grid;grid-template-columns:150px 1fr;gap:16px}
@media(max-width:700px){.article-item{grid-template-columns:1fr}}
.article-item img{border-radius:6px}
.article-item .meta{font-size:12px;color:var(--muted);margin-bottom:4px}
.article-item .title{font-size:17px;font-weight:700;color:var(--navy-dark)}
.article-item .excerpt{color:#3a4145;font-size:14px;margin:8px 0 6px}
.article-item .preview{color:var(--muted);font-size:13.5px;border-top:1px dashed var(--border);padding-top:8px;margin-top:6px}

/* timelines */
.timeline{display:flex;overflow-x:auto;gap:0;margin:18px 0;padding-bottom:6px}
.timeline .tl-step{flex:0 0 auto;min-width:150px;padding:14px;border-left:2px solid var(--pitch);position:relative}
.timeline .tl-step .tl-time{font-weight:700;color:var(--navy-dark);font-size:13px}
.timeline .tl-step p{font-size:13px;color:var(--muted);margin:6px 0 0}

/* tables */
table{width:100%;border-collapse:collapse;margin:14px 0}
th,td{border:1px solid var(--border);padding:9px 11px;text-align:left;font-size:14px;vertical-align:top}
th{background:var(--pitch-light);color:#335130}

/* layered diagram fallback list */
.layer-stack{display:flex;flex-direction:column;gap:6px;margin:16px 0}
.layer-stack div{background:var(--card);border:1px solid var(--border);border-left:5px solid var(--twin);border-radius:6px;padding:10px 14px;font-size:14px}

/* pill nav */
.pill-nav{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}
.pill-nav a{background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:16px;font-size:13px}

/* cta / buttons */
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}
.btn{display:inline-block;background:var(--equip);color:#fff;padding:10px 20px;border-radius:6px;font-weight:600;border:none;cursor:pointer;font-size:14px}
.btn:hover{background:#a24f22;text-decoration:none}
.btn.outline{background:#fff;color:var(--navy);border:1px solid var(--navy)}
.btn.twin{background:var(--twin)}

/* related box */
.related{background:var(--pitch-light);border-radius:10px;padding:18px 20px;margin-top:32px}
.related h3{margin-top:0;color:#335130}
.related ul{margin:0;padding-left:20px}

/* faq */
.faq details{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:10px 16px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--navy-dark)}
.faq[data-open="true"] summary{color:var(--equip)}

/* full article blocks */
.full-article{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:22px 24px;margin:22px 0}
.full-article .art-meta{font-size:12.5px;color:var(--muted);margin-bottom:6px}
.full-article h3.art-title{font-size:20px;color:var(--navy-dark);margin:0 0 10px}
.full-article h4{font-size:15.5px;color:var(--navy-dark);margin:20px 0 6px}
.full-article .art-figure{margin:14px 0}
.full-article .art-summary{background:var(--pitch-light);border-radius:8px;padding:12px 14px;font-size:13.5px;color:#335130;margin-top:16px}
.checked-date{font-size:12px;color:var(--muted);border-top:1px dashed var(--border);margin-top:16px;padding-top:10px}

/* twin state model */
.state-tree{font-family:Consolas,"Courier New",monospace;background:var(--navy-dark);color:#dce6ee;border-radius:8px;padding:16px 18px;font-size:13px;overflow-x:auto;white-space:pre}

/* zone tabs (twin.html) */
.zone-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}
.zone-tab{background:var(--card);border:1px solid var(--border);padding:8px 14px;border-radius:6px;cursor:pointer;font-size:13.5px}
.zone-tab.active{background:var(--twin);color:#fff;border-color:var(--twin)}
.zone-panel{display:none;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:14px 16px}
.zone-panel.active{display:block}
.zone-panel table{margin:0}

/* disclaimer */
.disclaimer{font-size:12.5px;color:var(--muted);background:#fbf9f5;border:1px solid var(--border);border-radius:8px;padding:12px 16px;margin:24px 0}

/* company section */
.company-box{display:grid;grid-template-columns:1.3fr 1fr;gap:20px;align-items:start}
@media(max-width:800px){.company-box{grid-template-columns:1fr}}
.company-facts{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px 18px;font-size:14px}
.company-facts dt{color:var(--muted);font-size:12.5px;margin-top:8px}
.company-facts dd{margin:2px 0 0;font-weight:600;color:var(--navy-dark)}

/* footer */
footer.site-footer{background:var(--navy-dark);color:#c7d3db;padding:36px 0 22px;margin-top:44px;font-size:13px}
footer.site-footer a{color:#c7d3db}
footer .foot-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;margin-bottom:22px}
@media(max-width:900px){footer .foot-grid{grid-template-columns:repeat(2,1fr)}}
footer h4{color:#fff;font-size:14px;margin:0 0 10px}
footer ul{list-style:none;margin:0;padding:0}
footer li{margin-bottom:6px}
.copyright{border-top:1px solid #1f3a52;padding-top:16px;color:#93a4b1;font-size:12px}
.copyright p{margin:0 0 6px}

/* back to top */
#backToTop{position:fixed;right:20px;bottom:24px;background:var(--navy);color:#fff;border:none;border-radius:50%;width:42px;height:42px;font-size:18px;cursor:pointer;display:none;box-shadow:0 2px 8px rgba(0,0,0,.25);z-index:60}
#backToTop.show{display:block}