/* im体育 imtiyu-qc.com.cn 全站样式
   Sports Business + League + Athlete + Fans + Media + AI World
   配色：深蓝 / 科技蓝 / 青绿 / 白 / 少量金橙 */

:root{
  --navy-950:#050b18;
  --navy-900:#0a1428;
  --navy-800:#0f1d3a;
  --navy-700:#16294d;
  --blue-500:#2f6fed;
  --blue-400:#4d8dff;
  --cyan-400:#2ee6c8;
  --cyan-300:#6ff4dd;
  --gold-400:#f2b84b;
  --orange-400:#ff8a3d;
  --white:#f6f9ff;
  --grey-200:#c7d2e8;
  --grey-400:#8fa0c4;
  --grey-600:#5c6c8e;
  --border:rgba(148,171,224,.18);
  --card-bg:rgba(16,26,52,.72);
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --maxw:1180px;
  --shadow-1:0 18px 40px -20px rgba(3,10,30,.55);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:radial-gradient(ellipse at top,#0c1730 0%,var(--navy-950) 55%,#03060f 100%);
  color:var(--grey-200);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--cyan-300);text-decoration:none;}
a:hover{color:var(--cyan-400);text-decoration:underline;}
h1,h2,h3,h4{color:var(--white);line-height:1.35;font-weight:700;margin:0 0 .6em;}
p{margin:0 0 1.1em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(6,12,26,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:66px;max-width:1440px;gap:14px;}
.brand{display:flex;align-items:center;gap:8px;color:var(--white);font-weight:800;font-size:17px;white-space:nowrap;flex:none;}
.brand img{width:30px;height:30px;flex:none;}
.brand .tag{display:none;}
.main-nav{display:flex;align-items:center;gap:0;flex-wrap:nowrap;min-width:0;}
.main-nav a{
  color:var(--grey-200);font-size:13px;font-weight:600;padding:7px 9px;border-radius:999px;
  white-space:nowrap;
}
.main-nav a:hover,.main-nav a.active{background:rgba(79,141,255,.14);color:var(--cyan-300);text-decoration:none;}
.nav-toggle{
  display:none;background:none;border:1px solid var(--border);border-radius:8px;color:var(--white);
  width:40px;height:40px;font-size:18px;cursor:pointer;
}
.header-actions{display:flex;align-items:center;gap:10px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 18px;border-radius:999px;font-weight:700;font-size:14px;cursor:pointer;border:1px solid transparent;
}
.btn-primary{background:linear-gradient(120deg,var(--blue-500),var(--cyan-400));color:#04101f;}
.btn-primary:hover{filter:brightness(1.08);text-decoration:none;color:#04101f;}
.btn-ghost{border-color:var(--border);color:var(--grey-200);background:rgba(255,255,255,.02);}
.btn-ghost:hover{border-color:var(--cyan-400);color:var(--cyan-300);text-decoration:none;}
.btn-sm{padding:6px 14px;font-size:13px;}

/* ---------- Hero ---------- */
.hero{padding:64px 0 40px;position:relative;overflow:hidden;}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;color:var(--cyan-300);font-size:13px;font-weight:700;
  border:1px solid rgba(46,230,200,.35);padding:5px 12px;border-radius:999px;margin-bottom:18px;background:rgba(46,230,200,.06);
}
.hero h1{font-size:38px;letter-spacing:-.01em;}
.hero p.lead{color:var(--grey-200);font-size:16.5px;max-width:640px;}
.hero-cta{display:flex;gap:12px;margin-top:22px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:26px;margin-top:32px;flex-wrap:wrap;}
.hero-stats div b{display:block;color:var(--white);font-size:22px;}
.hero-stats div span{font-size:12.5px;color:var(--grey-400);}
.hero-art{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);background:rgba(255,255,255,.02);}

/* ---------- Sections ---------- */
section{padding:44px 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;flex-wrap:wrap;}
.section-head h2{font-size:25px;margin:0;}
.section-head .kicker{color:var(--cyan-400);font-weight:700;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:6px;}
.section-head p{color:var(--grey-400);margin:6px 0 0;max-width:640px;}
.section-more{font-size:13.5px;font-weight:700;white-space:nowrap;}

/* ---------- Cards / Article grid ---------- */
.grid{display:grid;gap:18px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:20px;display:flex;flex-direction:column;gap:10px;transition:transform .15s ease,border-color .15s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(79,141,255,.5);}
.card .thumb{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border);margin-bottom:4px;background:var(--navy-800);}
.card .cat{color:var(--cyan-400);font-size:12px;font-weight:700;letter-spacing:.04em;}
.card h3{font-size:17px;margin:2px 0 0;}
.card h3 a{color:var(--white);}
.card h3 a:hover{color:var(--cyan-300);text-decoration:none;}
.card .excerpt{color:var(--grey-400);font-size:14px;flex:1;}
.card .meta{display:flex;gap:12px;font-size:12.5px;color:var(--grey-600);border-top:1px dashed var(--border);padding-top:10px;flex-wrap:wrap;}
.card .meta .tag{color:var(--grey-400);}
.card.core{border-color:rgba(242,184,75,.35);}
.card.core .cat{color:var(--gold-400);}

.article-list{display:flex;flex-direction:column;gap:14px;}
.article-row{
  display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:flex-start;
  background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 16px;
}
.article-row .thumb{width:96px;height:72px;border-radius:8px;overflow:hidden;border:1px solid var(--border);}
.article-row h3{font-size:15.5px;margin:0 0 4px;}
.article-row .excerpt{font-size:13.5px;color:var(--grey-400);margin:0 0 6px;}
.article-row .meta{font-size:12px;color:var(--grey-600);display:flex;gap:10px;flex-wrap:wrap;}

/* ---------- Tech matrix ---------- */
.matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;}
.matrix .pill{
  border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 16px;background:rgba(255,255,255,.02);
  font-size:13.5px;color:var(--grey-200);font-weight:600;
}
.matrix .pill b{display:block;color:var(--cyan-300);font-size:12px;font-weight:700;margin-bottom:4px;letter-spacing:.03em;}

/* ---------- FAQ ---------- */
.faq-item{border-bottom:1px solid var(--border);padding:16px 0;}
.faq-q{
  display:flex;justify-content:space-between;align-items:center;cursor:pointer;color:var(--white);
  font-weight:700;font-size:15.5px;gap:16px;
}
.faq-q .icon{color:var(--cyan-400);font-size:18px;transition:transform .2s ease;flex:none;}
.faq-item.open .faq-q .icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;color:var(--grey-400);font-size:14.5px;transition:max-height .25s ease;}
.faq-item.open .faq-a{max-height:600px;padding-top:10px;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13px;color:var(--grey-600);padding:16px 0 0;}
.breadcrumb a{color:var(--grey-400);}
.breadcrumb span.sep{margin:0 6px;color:var(--grey-600);}
.breadcrumb .current{color:var(--grey-200);}

/* ---------- Article page ---------- */
.article-head{padding:22px 0 10px;border-bottom:1px solid var(--border);margin-bottom:30px;}
.article-head .cat-tag{color:var(--cyan-400);font-weight:700;font-size:12.5px;letter-spacing:.05em;}
.article-head h1{font-size:29px;margin:10px 0 14px;max-width:840px;}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--grey-400);font-size:13.5px;padding-bottom:18px;}
.article-meta b{color:var(--grey-200);}
.article-lede{font-size:16px;color:var(--grey-200);border-left:3px solid var(--cyan-400);padding-left:16px;margin:0 0 8px;}
.article-body{max-width:760px;font-size:16px;color:var(--grey-200);}
.article-body h2{font-size:21px;margin-top:1.6em;}
.article-body h3{font-size:17.5px;color:var(--cyan-300);}
.article-body ul{padding-left:22px;color:var(--grey-200);}
.article-body li{margin-bottom:6px;}
.article-body blockquote{
  border-left:3px solid var(--gold-400);margin:20px 0;padding:4px 18px;color:var(--grey-200);
  background:rgba(242,184,75,.06);border-radius:0 8px 8px 0;
}
.tag-row{display:flex;gap:8px;flex-wrap:wrap;margin:26px 0;}
.tag-row a{
  border:1px solid var(--border);border-radius:999px;padding:5px 13px;font-size:12.5px;color:var(--grey-400);
}
.related-block{margin-top:44px;padding-top:26px;border-top:1px solid var(--border);}
.related-block h2{font-size:19px;}
.author-box{
  display:flex;gap:14px;align-items:center;background:var(--card-bg);border:1px solid var(--border);
  border-radius:var(--radius-md);padding:16px;margin:30px 0;
}
.author-box img{width:52px;height:52px;border-radius:50%;border:1px solid var(--border);}
.author-box .name{color:var(--white);font-weight:700;font-size:14.5px;}
.author-box .desc{color:var(--grey-400);font-size:13px;}

/* ---------- Timeline (career) ---------- */
.timeline{border-left:2px solid var(--border);margin-left:8px;padding-left:22px;}
.timeline .tl-item{position:relative;padding-bottom:20px;}
.timeline .tl-item::before{
  content:"";position:absolute;left:-28px;top:4px;width:10px;height:10px;border-radius:50%;
  background:var(--cyan-400);box-shadow:0 0 0 4px rgba(46,230,200,.15);
}
.timeline .tl-year{color:var(--gold-400);font-weight:700;font-size:13px;}

/* ---------- FAQ page schema note / generic content page ---------- */
.prose{max-width:800px;font-size:15.5px;color:var(--grey-200);}
.prose h2{font-size:20px;margin-top:1.4em;}

/* ---------- Form (login/signup/contact) ---------- */
.form-card{max-width:440px;margin:0 auto;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);padding:30px;}
.form-card h1{font-size:22px;text-align:center;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:13.5px;color:var(--grey-400);margin-bottom:6px;}
.field input,.field textarea{
  width:100%;padding:11px 13px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03);
  color:var(--white);font-size:14.5px;font-family:inherit;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--cyan-400);}
.form-note{font-size:12.5px;color:var(--grey-600);text-align:center;margin-top:14px;}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--border);padding:48px 0 24px;margin-top:60px;background:rgba(3,7,17,.6);}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:26px;}
.footer-grid h4{color:var(--white);font-size:13.5px;margin-bottom:14px;}
.footer-grid ul{list-style:none;margin:0;padding:0;}
.footer-grid li{margin-bottom:9px;}
.footer-grid a{color:var(--grey-400);font-size:13.5px;}
.footer-brand p{color:var(--grey-600);font-size:13px;max-width:280px;}
.footer-bottom{
  border-top:1px solid var(--border);margin-top:34px;padding-top:20px;display:flex;justify-content:space-between;
  flex-wrap:wrap;gap:10px;color:var(--grey-600);font-size:12.5px;
}
.back-to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:50%;
  background:linear-gradient(120deg,var(--blue-500),var(--cyan-400));color:#04101f;border:none;
  font-size:18px;cursor:pointer;box-shadow:var(--shadow-1);display:none;align-items:center;justify-content:center;z-index:60;
}
.back-to-top.show{display:flex;}

/* ---------- Search assist pages ---------- */
.search-box{display:flex;gap:10px;max-width:520px;margin:22px 0 34px;}
.search-box input{flex:1;padding:12px 16px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03);color:var(--white);}
.search-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px;}
.search-tags a{border:1px solid var(--border);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--grey-400);}

@media (max-width:1320px){
  .main-nav{display:none;}
  .nav-toggle{display:block;}
  .main-nav.open{
    display:flex;flex-direction:column;position:absolute;top:66px;left:0;right:0;background:var(--navy-900);
    padding:12px 20px 20px;border-bottom:1px solid var(--border);gap:4px;z-index:55;
  }
  .main-nav.open a{padding:11px 14px;font-size:15px;}
}
@media (max-width:980px){
  .hero .container{grid-template-columns:1fr;}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}
  .matrix{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:620px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr;}
  .hero h1{font-size:29px;}
  .article-row{grid-template-columns:1fr;}
  .article-row .thumb{width:100%;height:150px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .header-actions .btn-ghost{display:none;}
  .header-actions{gap:8px;}
  .header-actions .btn-primary{padding:8px 12px;font-size:12.5px;white-space:nowrap;}
  .brand span{font-size:15px;}
}