/* 劲爆体育官网 - 全站样式
   视觉体系：Sports Tactical Intelligence Lab + AI Strategy Game + Esports Training Console
   主色：深海军蓝 / 科技蓝 / 数据青 / 冷白，少量竞技橙 */

:root{
  --navy-950:#060b16;
  --navy-900:#0a1224;
  --navy-800:#0f1a30;
  --navy-700:#16233d;
  --navy-600:#1d2d4d;
  --line:#243352;
  --blue-500:#3b6ef6;
  --blue-400:#5a8bff;
  --cyan-400:#33d6c8;
  --cyan-300:#6ee8dc;
  --orange-500:#ff7a3d;
  --orange-400:#ff9a63;
  --ink-0:#f5f8ff;
  --ink-1:#c9d4ec;
  --ink-2:#93a1c4;
  --ink-3:#6d7ba0;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --maxw:1180px;
  --shadow-1:0 20px 50px -25px rgba(5,10,25,.7);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--navy-950);
  color:var(--ink-1);
  line-height:1.75;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--cyan-300);text-decoration:none;}
a:hover{color:var(--orange-400);}
ul,ol{padding-left:1.2em;}
h1,h2,h3,h4{color:var(--ink-0);line-height:1.35;margin:0 0 .6em;font-weight:700;}
h1{font-size:clamp(1.7rem,4vw,2.6rem);}
h2{font-size:clamp(1.35rem,2.6vw,1.9rem);}
h3{font-size:1.2rem;}
p{margin:0 0 1em;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section{padding:64px 0;border-top:1px solid var(--line);}
.section-head{max-width:760px;margin:0 0 36px;}
.section-head .eyebrow{display:inline-block;color:var(--cyan-400);font-size:.8rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px;font-weight:700;}
.section-head p{color:var(--ink-2);}
.tag{display:inline-block;padding:3px 10px;font-size:.72rem;border:1px solid var(--line);border-radius:99px;color:var(--cyan-300);letter-spacing:.05em;}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(6,11,22,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;max-width:var(--maxw);margin:0 auto;}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink-0);font-weight:800;font-size:1.05rem;}
.brand img{width:34px;height:34px;}
.nav-links{display:flex;gap:6px;list-style:none;margin:0;padding:0;}
.nav-links a{color:var(--ink-1);padding:8px 12px;border-radius:8px;font-size:.92rem;white-space:nowrap;}
.nav-links a:hover,.nav-links a.active{color:var(--ink-0);background:var(--navy-700);}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;color:var(--ink-0);width:40px;height:40px;font-size:1.2rem;cursor:pointer;}
@media (max-width:960px){
  .nav-links{position:fixed;inset:60px 0 0 0;background:var(--navy-950);flex-direction:column;padding:18px;height:calc(100vh - 60px);overflow-y:auto;transform:translateX(100%);transition:transform .25s ease;}
  .nav-links.open{transform:translateX(0);}
  .nav-links a{padding:14px 10px;border-bottom:1px solid var(--line);font-size:1rem;}
  .nav-toggle{display:block;}
}

/* ---------- Hero ---------- */
.hero{padding:56px 0 40px;position:relative;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr;}}
.hero h1{margin-bottom:16px;}
.hero .lead{font-size:1.05rem;color:var(--ink-1);}
.hero .sub{color:var(--ink-2);}
.hero-badges{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px;}
.hero-panel{background:linear-gradient(160deg,var(--navy-800),var(--navy-900));border:1px solid var(--line);border-radius:var(--radius-lg);padding:14px;box-shadow:var(--shadow-1);}
.hero-panel .cap{margin-top:10px;color:var(--ink-3);font-size:.78rem;text-align:center;}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:700;font-size:.94rem;border:1px solid transparent;cursor:pointer;}
.btn-primary{background:linear-gradient(120deg,var(--blue-500),var(--cyan-400));color:#04121e;}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink-0);}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px;}

/* ---------- 三大方向卡片 ---------- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
@media (max-width:900px){.pillars{grid-template-columns:1fr;}}
.pillar-card{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;}
.pillar-card .flow{margin-top:14px;font-size:.83rem;color:var(--ink-2);border-top:1px dashed var(--line);padding-top:12px;line-height:1.9;}
.pillar-card h3{color:var(--cyan-300);}

/* ---------- 流程 / 图示区 ---------- */
.diagram-wrap{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px;overflow-x:auto;}
.diagram-wrap svg{width:100%;height:auto;display:block;min-width:520px;}
.diagram-cap{margin-top:10px;color:var(--ink-3);font-size:.82rem;text-align:center;}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;}
@media (max-width:900px){.two-col{grid-template-columns:1fr;}}

/* ---------- 文章 ---------- */
.article{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;margin-bottom:22px;}
.article .meta{display:flex;gap:10px;align-items:center;margin-bottom:10px;flex-wrap:wrap;}
.article .cat{color:var(--orange-400);font-size:.78rem;font-weight:700;letter-spacing:.04em;}
.article h2{margin-bottom:14px;}
.article p{color:var(--ink-1);}
.article .note{font-size:.82rem;color:var(--ink-3);border-left:2px solid var(--cyan-400);padding-left:10px;margin:14px 0;}
.article .more{display:inline-block;margin-top:6px;font-weight:700;}
.article-wide{grid-column:1 / -1;}
.article-grid{display:grid;grid-template-columns:1fr;gap:0;}
.article-grid.two{grid-template-columns:1fr 1fr;gap:22px;}
@media (max-width:900px){.article-grid.two{grid-template-columns:1fr;}}

.observe{background:var(--navy-700);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px;}
.observe-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
@media (max-width:900px){.observe-grid{grid-template-columns:1fr;}}

/* ---------- 回流卡片 ---------- */
.feed-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
@media (max-width:900px){.feed-grid{grid-template-columns:1fr;}}
.feed-card{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-md);padding:18px;}
.feed-card h4{margin-bottom:8px;color:var(--ink-0);font-size:1rem;}
.feed-card p{color:var(--ink-2);font-size:.92rem;margin-bottom:10px;}
.feed-card a{font-size:.86rem;font-weight:700;}
.feed-label{color:var(--cyan-400);font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin:36px 0 14px;display:flex;align-items:center;gap:10px;}
.feed-label::after{content:"";flex:1;height:1px;background:var(--line);}

/* ---------- 时间线 ---------- */
.timeline{position:relative;padding-left:26px;border-left:2px solid var(--line);}
.timeline .step{position:relative;margin-bottom:22px;}
.timeline .step::before{content:"";position:absolute;left:-33px;top:4px;width:12px;height:12px;border-radius:50%;background:var(--cyan-400);box-shadow:0 0 0 4px rgba(51,214,200,.15);}
.timeline .step h4{margin-bottom:4px;color:var(--ink-0);}
.timeline .step p{color:var(--ink-2);font-size:.92rem;margin:0;}
.timeline .step{transition:opacity .2s ease;}
.timeline .step.is-active::before{background:var(--orange-500);box-shadow:0 0 0 6px rgba(255,122,61,.22);}
.timeline .step.is-active h4{color:var(--orange-400);}
.learning-demo-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:6px;}

/* ---------- Tab ---------- */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px;}
.tab-btn{background:var(--navy-700);border:1px solid var(--line);color:var(--ink-1);padding:9px 16px;border-radius:99px;font-size:.88rem;cursor:pointer;}
.tab-btn.active{background:linear-gradient(120deg,var(--blue-500),var(--cyan-400));color:#04121e;border-color:transparent;font-weight:700;}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{width:100%;text-align:left;background:none;border:none;color:var(--ink-0);padding:16px 4px;font-size:.98rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;gap:12px;align-items:center;}
.faq-q .icon{color:var(--cyan-400);font-size:1.1rem;flex:none;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;color:var(--ink-2);font-size:.92rem;padding:0 4px;}
.faq-item.open .faq-a{max-height:400px;padding-bottom:16px;}
.faq-cols{columns:1;}
@media (min-width:900px){.faq-cols{columns:2;column-gap:28px;}.faq-item{break-inside:avoid;}}

/* ---------- 功能列表 / 数字面板 ---------- */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
@media (max-width:760px){.stat-row{grid-template-columns:repeat(2,1fr);}}
.stat-box{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-md);padding:16px;text-align:center;}
.stat-box .num{font-size:1.5rem;font-weight:800;color:var(--cyan-300);}
.stat-box .lab{font-size:.78rem;color:var(--ink-3);}

.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
@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(--navy-800);border:1px solid var(--line);border-radius:var(--radius-md);padding:18px;}
.feature-card .n{color:var(--orange-400);font-weight:800;font-size:.8rem;}
.feature-card h4{margin:6px 0;}
.feature-card p{color:var(--ink-2);font-size:.88rem;margin:0;}

/* ---------- 公司介绍 / Footer ---------- */
.company-box{background:var(--navy-800);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;}
.site-footer{background:var(--navy-900);border-top:1px solid var(--line);padding:40px 0 20px;color:var(--ink-3);font-size:.86rem;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;}}
.footer-grid h5{color:var(--ink-1);font-size:.88rem;margin:0 0 10px;}
.footer-grid ul{list-style:none;padding:0;margin:0;}
.footer-grid li{margin-bottom:8px;}
.footer-grid a{color:var(--ink-3);}
.footer-bottom{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}
.icp{color:var(--ink-3);}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:.82rem;color:var(--ink-3);padding:14px 0 0;}
.breadcrumb a{color:var(--ink-3);}
.breadcrumb a:hover{color:var(--cyan-300);}

/* ---------- 返回顶部 ---------- */
.back-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;background:var(--navy-700);border:1px solid var(--line);color:var(--ink-0);display:none;align-items:center;justify-content:center;cursor:pointer;z-index:40;box-shadow:var(--shadow-1);}
.back-top.show{display:flex;}

/* ---------- 表格局部滚动 ---------- */
.scroll-x{overflow-x:auto;}
table.compat{width:100%;border-collapse:collapse;min-width:560px;font-size:.9rem;}
table.compat th,table.compat td{border:1px solid var(--line);padding:10px 12px;text-align:left;color:var(--ink-1);}
table.compat th{background:var(--navy-700);color:var(--ink-0);}

.mt-lg{margin-top:36px;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
@media (max-width:760px){.grid-2{grid-template-columns:1fr;}}