/* 万博体育官网 - static/css/style.css */
:root{
  --navy-deep:#050d1c;
  --navy:#0b1a33;
  --city-blue:#12294f;
  --panel:#0f2247;
  --line:#274a7a;
  --cyan:#35c9d6;
  --orange:#ff8a3d;
  --white:#ffffff;
  --gray-light:#eef1f5;
  --gray-mid:#5b6b85;
  --text-dark:#1b2436;
  --text-body:#33415c;
  --radius:14px;
  --maxw:1180px;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text-body);
  background:var(--gray-light);
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--city-blue);text-decoration:none;}
a:hover{color:var(--cyan);}
h1,h2,h3,h4{color:var(--text-dark);line-height:1.4;margin:0 0 .6em;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.3em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:var(--navy);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.nav-wrap{
  max-width:var(--maxw);margin:0 auto;padding:0 20px;
  display:flex;align-items:center;justify-content:space-between;
  height:66px;
}
.brand{display:flex;align-items:center;gap:8px;}
.brand img{height:34px;}
.brand-text{display:none;}
.main-nav{display:flex;gap:6px;}
.main-nav a{
  color:#cfd9ee;font-size:14.5px;padding:10px 12px;border-radius:8px;white-space:nowrap;
}
.main-nav a:hover,.main-nav a.active{
  color:var(--white);background:rgba(53,201,214,.12);
}
.nav-toggle{
  display:none;background:none;border:1px solid rgba(255,255,255,.25);
  border-radius:8px;color:var(--white);font-size:20px;padding:4px 10px;cursor:pointer;
}
@media (max-width:960px){
  .main-nav{
    position:absolute;top:66px;left:0;right:0;background:var(--navy);
    flex-direction:column;padding:8px 16px 16px;gap:2px;
    border-bottom:1px solid rgba(255,255,255,.08);
    display:none;
  }
  .main-nav.open{display:flex;}
  .nav-toggle{display:inline-block;}
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--navy-deep) 0%,var(--navy) 55%,var(--city-blue) 100%);
  color:#eaf1fb;padding:56px 0 64px;
}
.hero-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;
}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;}}
.hero h1{color:var(--white);font-size:clamp(24px,3.4vw,36px);margin-bottom:16px;}
.hero .lead{font-size:17px;color:#dfe8fb;margin-bottom:10px;}
.hero .sub{font-size:14.5px;color:#a9bade;}
.hero-actions{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap;}
.btn{
  display:inline-block;padding:11px 22px;border-radius:999px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--cyan);color:#052026;}
.btn-primary:hover{background:#4fd6e2;color:#052026;}
.btn-outline{background:transparent;color:#eaf1fb;border-color:rgba(255,255,255,.35);}
.btn-outline:hover{border-color:var(--cyan);color:var(--cyan);}
.hero-panel{
  background:rgba(10,22,44,.55);border:1px solid rgba(255,255,255,.1);
  border-radius:var(--radius);padding:14px;
}
.hero-panel figcaption{font-size:12px;color:#93a6c8;margin-top:8px;text-align:center;}

/* ---------- Section ---------- */
.section{padding:56px 0;}
.section-alt{background:var(--white);}
.section-title{font-size:26px;margin-bottom:8px;}
.section-desc{color:var(--gray-mid);margin-bottom:28px;max-width:760px;}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:1px;color:var(--orange);
  background:rgba(255,138,61,.1);border-radius:999px;padding:4px 12px;margin-bottom:10px;font-weight:600;
}

/* ---------- Article blocks (long-form SEO content) ---------- */
.article-list{display:flex;flex-direction:column;gap:34px;}
.article{
  background:var(--white);border:1px solid #e2e7ef;border-radius:var(--radius);
  padding:28px 30px;
}
.article .tag-row{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap;}
.article .tag{
  font-size:12px;color:var(--city-blue);background:var(--gray-light);border-radius:999px;
  padding:3px 11px;font-weight:600;
}
.article h2{font-size:20px;}
.article h3{font-size:16.5px;margin-top:1.2em;}
.article p{color:var(--text-body);font-size:15px;}
.article .figure{margin:18px 0;background:var(--navy);border-radius:10px;padding:10px;}
.article .figure figcaption{color:#a9bade;font-size:12px;text-align:center;margin-top:6px;}
.article .note{font-size:12.5px;color:var(--gray-mid);}
.inline-links{margin-top:16px;padding-top:14px;border-top:1px dashed #dde3ed;font-size:14px;}
.inline-links a{font-weight:600;margin-right:16px;}

/* ---------- Observation cards ---------- */
.observe-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media (max-width:900px){.observe-grid{grid-template-columns:1fr;}}
.observe-card{
  background:var(--navy);color:#dfe8fb;border-radius:var(--radius);padding:24px;
}
.observe-card h3{color:var(--white);font-size:16.5px;}
.observe-card p{color:#b9c6e2;font-size:14px;}

/* ---------- Summary cards (cross-page recirculation) ---------- */
.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
@media (max-width:900px){.summary-grid{grid-template-columns:1fr;}}
.summary-card{
  background:var(--gray-light);border-radius:var(--radius);padding:20px 22px;border:1px solid #e2e7ef;
}
.summary-card h3{font-size:15.5px;margin-bottom:8px;}
.summary-card p{font-size:13.5px;color:var(--text-body);margin-bottom:10px;}
.summary-card a.more{font-size:13px;font-weight:600;}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:10px;}
.faq-item{background:var(--white);border:1px solid #e2e7ef;border-radius:10px;overflow:hidden;}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  padding:15px 18px;cursor:pointer;font-weight:600;color:var(--text-dark);font-size:14.5px;
  background:none;border:none;width:100%;text-align:left;
}
.faq-q .icon{font-size:18px;color:var(--cyan);transition:transform .2s;flex-shrink:0;}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;padding:0 18px;}
.faq-a p{font-size:14px;color:var(--text-body);padding-bottom:14px;margin:0;}
.faq-item.open .faq-a{max-height:400px;}
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:14px 26px;}
@media (max-width:800px){.faq-cols{grid-template-columns:1fr;}}

/* ---------- Diagram/flow generic ---------- */
.diagram-box{background:var(--navy);border-radius:var(--radius);padding:16px;overflow-x:auto;}
.diagram-box figcaption{color:#a9bade;font-size:12.5px;text-align:center;margin-top:10px;}

/* ---------- Interactive demo blocks ---------- */
.demo-box{
  background:var(--white);border:1px solid #e2e7ef;border-radius:var(--radius);padding:24px;
}
.demo-tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.demo-tab{
  padding:8px 16px;border-radius:999px;border:1px solid #d7dee9;background:var(--gray-light);
  font-size:13.5px;cursor:pointer;font-weight:600;color:var(--text-body);
}
.demo-tab.active{background:var(--navy);color:var(--white);border-color:var(--navy);}
.demo-panel{display:none;}
.demo-panel.active{display:block;}
.slider-row{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.slider-row label{width:110px;font-size:13.5px;flex-shrink:0;}
.slider-row input[type=range]{flex:1;}
.slider-row .val{width:34px;text-align:right;font-weight:700;color:var(--city-blue);}
.budget-note{font-size:13px;color:var(--gray-mid);margin-top:8px;}
.result-box{
  margin-top:14px;background:var(--gray-light);border-radius:10px;padding:14px 16px;font-size:14px;
}

/* ---------- Timeline interactive ---------- */
.timeline-stage-btns{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.timeline-stage-btns button{
  padding:7px 14px;border-radius:999px;border:1px solid #d7dee9;background:var(--white);
  font-size:13px;cursor:pointer;
}
.timeline-stage-btns button.active{background:var(--orange);color:#2c1200;border-color:var(--orange);}
.timeline-detail{background:var(--gray-light);border-radius:10px;padding:16px;font-size:14px;}

/* ---------- City district tabs ---------- */
.city-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.city-tabs button{
  padding:8px 14px;border-radius:8px;border:1px solid #d7dee9;background:var(--white);
  font-size:13.5px;cursor:pointer;
}
.city-tabs button.active{background:var(--city-blue);color:var(--white);border-color:var(--city-blue);}
.city-panel{display:none;background:var(--gray-light);border-radius:10px;padding:16px;font-size:14px;}
.city-panel.active{display:block;}

/* ---------- App feature grid ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
@media (max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:520px){.feature-grid{grid-template-columns:1fr;}}
.feature-card{background:var(--white);border:1px solid #e2e7ef;border-radius:var(--radius);padding:20px;}
.feature-card .num{color:var(--orange);font-weight:800;font-size:13px;}
.feature-card h3{font-size:15px;margin:6px 0 8px;}
.feature-card p{font-size:13.5px;color:var(--text-body);margin:0;}

/* ---------- App tabs (screens) ---------- */
.app-tab-wrap{display:grid;grid-template-columns:.6fr 1fr;gap:26px;align-items:start;}
@media (max-width:800px){.app-tab-wrap{grid-template-columns:1fr;}}
.app-tabs{display:flex;flex-direction:column;gap:8px;}
.app-tabs button{
  text-align:left;padding:12px 16px;border-radius:10px;border:1px solid #e2e7ef;background:var(--white);
  cursor:pointer;font-size:14px;font-weight:600;color:var(--text-body);
}
.app-tabs button.active{background:var(--navy);color:var(--white);border-color:var(--navy);}
.app-screen-desc{display:none;}
.app-screen-desc.active{display:block;background:var(--gray-light);border-radius:var(--radius);padding:18px;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--gray-mid);padding:14px 0;}
.breadcrumb a{color:var(--gray-mid);}
.breadcrumb a:hover{color:var(--cyan);}

/* ---------- Steps list ---------- */
.steps{display:flex;flex-direction:column;gap:14px;}
.step{display:flex;gap:14px;background:var(--white);border:1px solid #e2e7ef;border-radius:12px;padding:16px 18px;}
.step .step-num{
  flex-shrink:0;width:30px;height:30px;border-radius:50%;background:var(--city-blue);color:var(--white);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;
}
.step h4{margin:0 0 4px;font-size:14.5px;}
.step p{margin:0;font-size:13.5px;color:var(--text-body);}

/* ---------- Table ---------- */
.table-wrap{overflow-x:auto;}
table.compare{width:100%;border-collapse:collapse;background:var(--white);border-radius:10px;overflow:hidden;min-width:560px;}
table.compare th,table.compare td{padding:12px 14px;border-bottom:1px solid #e2e7ef;font-size:13.5px;text-align:left;}
table.compare th{background:var(--navy);color:var(--white);font-weight:600;}
table.compare tr:last-child td{border-bottom:none;}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--city-blue),var(--navy));color:var(--white);
  border-radius:var(--radius);padding:34px 32px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;
}
.cta-band h3{color:var(--white);margin-bottom:6px;}
.cta-band p{color:#c7d3ec;margin:0;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-deep);color:#a9bade;padding:44px 0 26px;font-size:13.5px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;}
@media (max-width:800px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-grid h4{color:var(--white);font-size:14px;margin-bottom:10px;}
.footer-grid ul{list-style:none;padding:0;margin:0;}
.footer-grid ul li{margin-bottom:8px;}
.footer-grid a{color:#a9bade;}
.footer-grid a:hover{color:var(--cyan);}
.footer-brand{display:flex;align-items:center;gap:8px;margin-bottom:10px;}
.footer-brand img{height:28px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:18px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:#7d8cad;font-size:12.5px;
}
.icp-slot{min-height:14px;}

/* ---------- Back to top ---------- */
.back-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  background:var(--city-blue);color:var(--white);border:none;font-size:18px;cursor:pointer;
  display:none;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(0,0,0,.25);z-index:90;
}
.back-top.show{display:flex;}

/* ---------- Utility ---------- */
.mt0{margin-top:0;}
.center{text-align:center;}
.small{font-size:13px;color:var(--gray-mid);}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
@media (max-width:800px){.grid-2{grid-template-columns:1fr;}}
.badge-list{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0;}
.badge-list span{
  font-size:12.5px;background:var(--gray-light);border-radius:999px;padding:4px 12px;color:var(--city-blue);
  border:1px solid #dde3ed;
}