/* ==========================================================================
   赛车商业与体育传媒社 · Racing Business & Sports Media Society
   主题：蓝色 telemetry / 赛道美学
   ========================================================================== */

:root{
  --navy-900:#020814;
  --navy-800:#05122b;
  --navy-700:#0a2149;
  --navy-600:#123363;
  --blue-700:#0d47a1;
  --blue-600:#1461cc;
  --blue-500:#2b80ef;
  --blue-400:#63a8ff;
  --blue-100:#dce9ff;
  --cyan:#3ce0ff;
  --paper:#f4f7fd;
  --white:#ffffff;
  --ink:#08142c;
  --muted:#5a6c8c;
  --line:rgba(10,33,73,.12);
  --line-2:rgba(10,33,73,.24);
  --shadow-sm:0 1px 2px rgba(5,18,43,.06),0 10px 26px -20px rgba(5,18,43,.45);
  --shadow-md:0 22px 50px -30px rgba(5,18,43,.55);
  --radius:16px;
  --radius-sm:10px;
  --font-sans:"Inter","Segoe UI Variable","Helvetica Neue",Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --wrap:1160px;
  --header-h:70px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink);
  background:linear-gradient(180deg,#ffffff 0,var(--paper) 620px);
  overflow-x:hidden;
}
img,svg{max-width:100%}
a{color:var(--blue-600);text-decoration:none}
a:hover{color:var(--blue-700)}
h1,h2,h3,h4{line-height:1.22;margin:0;letter-spacing:-.015em;font-weight:800}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit}
:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:6px}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 clamp(18px,4vw,34px)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--cyan);color:var(--navy-900);padding:10px 16px;font-weight:700}
.skip-link:focus{left:12px;top:10px}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(5,18,43,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(99,168,255,.18);
  transition:background .3s ease, box-shadow .3s ease;
}
.site-header.is-stuck{box-shadow:0 14px 34px -24px rgba(2,8,20,.9)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:var(--header-h)}
.brand{display:flex;align-items:center;gap:12px;color:#fff;flex:0 0 auto}
.brand:hover{color:#fff}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;background:linear-gradient(140deg,var(--blue-600),var(--navy-700));border:1px solid rgba(99,168,255,.4);flex:0 0 auto}
.brand-mark svg{width:22px;height:22px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:15.5px;letter-spacing:.02em}
.brand-text em{font-style:normal;font-family:var(--font-mono);font-size:9.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--blue-400)}
.site-nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.site-nav a{color:rgba(255,255,255,.8);font-size:14.5px;font-weight:600;padding:9px 12px;border-radius:9px;transition:background .2s,color .2s}
.site-nav a:hover{color:#fff;background:rgba(99,168,255,.14)}
.site-nav a[aria-current="page"]{color:#fff;background:rgba(60,224,255,.16);box-shadow:inset 0 0 0 1px rgba(60,224,255,.35)}
.site-nav a.btn{margin-left:6px;color:#04101f}
.site-nav a.btn:hover{color:#04101f;background:linear-gradient(120deg,var(--cyan),var(--blue-400))}
.scroll-meter{height:3px;background:rgba(99,168,255,.16)}
.scroll-meter span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue-500),var(--cyan));transition:width .12s linear}
.nav-toggle{display:none;margin-left:auto;width:42px;height:38px;border-radius:10px;border:1px solid rgba(99,168,255,.35);background:rgba(99,168,255,.1);cursor:pointer;padding:9px 10px;flex-direction:column;justify-content:space-between}
.nav-toggle span{display:block;height:2px;background:#fff;border-radius:2px;transition:transform .25s ease,opacity .2s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:11px;border:1px solid transparent;
  font-weight:700;font-size:15px;cursor:pointer;
  transition:transform .18s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-2px)}
.btn svg{width:17px;height:17px;flex:0 0 auto}
.btn-primary{background:linear-gradient(120deg,var(--blue-600),var(--blue-500));color:#fff;box-shadow:0 14px 28px -18px rgba(20,97,204,.95)}
.btn-primary:hover{color:#fff;box-shadow:0 20px 34px -18px rgba(20,97,204,1)}
.btn-ghost{border-color:var(--line-2);color:var(--navy-700);background:rgba(255,255,255,.7)}
.btn-ghost:hover{color:var(--navy-800);border-color:var(--blue-500);background:#fff}
.btn-onDark{border-color:rgba(99,168,255,.45);color:#eaf3ff;background:rgba(99,168,255,.12)}
.btn-onDark:hover{color:#fff;background:rgba(99,168,255,.22);border-color:var(--cyan)}
.btn-sm{padding:10px 16px;font-size:14px;border-radius:9px}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:14.5px}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover::after{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:
   radial-gradient(1100px 520px at 82% -10%,rgba(43,128,239,.42),transparent 62%),
   radial-gradient(760px 420px at 6% 108%,rgba(60,224,255,.16),transparent 60%),
   linear-gradient(170deg,var(--navy-900),var(--navy-800) 55%,var(--navy-700));
  color:#e8f1ff;padding:clamp(56px,7vw,96px) 0 0}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(99,168,255,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(99,168,255,.09) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(70% 60% at 60% 40%,#000,transparent 78%);-webkit-mask-image:radial-gradient(70% 60% at 60% 40%,#000,transparent 78%)}
.hero-speed{position:absolute;inset:0;opacity:.5;pointer-events:none;
  background:repeating-linear-gradient(115deg,transparent 0 34px,rgba(99,168,255,.13) 34px 36px,transparent 36px 84px);
  animation:slide 22s linear infinite}
@keyframes slide{from{background-position:0 0}to{background-position:-420px 0}}
.hero-circuit{position:absolute;right:-60px;top:40px;width:min(620px,72vw);opacity:.5;pointer-events:none}
.hero-circuit path{fill:none;stroke:rgba(99,168,255,.5);stroke-width:2.5;stroke-dasharray:14 12;animation:draw 30s linear infinite}
@keyframes draw{to{stroke-dashoffset:-520}}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:clamp(28px,4vw,56px);align-items:center;padding-bottom:clamp(52px,6vw,86px)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--blue-400);margin-bottom:18px}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(60,224,255,.2);animation:pulse 2.6s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(60,224,255,.18)}50%{box-shadow:0 0 0 9px rgba(60,224,255,.05)}}
.hero h1{font-size:clamp(34px,5.6vw,64px);letter-spacing:-.03em}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--cyan),var(--blue-400) 62%,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lede{margin-top:20px;font-size:clamp(15.5px,1.4vw,17.5px);color:rgba(232,241,255,.82);max-width:56ch}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;font-size:12.5px;color:var(--blue-400);letter-spacing:.06em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}

.telemetry{background:linear-gradient(165deg,rgba(9,29,63,.92),rgba(3,11,26,.94));border:1px solid rgba(99,168,255,.3);border-radius:20px;padding:22px;box-shadow:0 40px 70px -44px rgba(0,0,0,.95);position:relative;overflow:hidden}
.telemetry::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--cyan),var(--blue-500),transparent)}
.telemetry-head{display:flex;justify-content:space-between;align-items:center;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--blue-400);padding-bottom:14px;border-bottom:1px dashed rgba(99,168,255,.28)}
.telemetry-head .live{color:var(--cyan)}
.tel-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px solid rgba(99,168,255,.14)}
.tel-row:last-of-type{border-bottom:0}
.tel-row span{font-size:14px;color:rgba(232,241,255,.75)}
.tel-row b{font-family:var(--font-mono);font-size:16.5px;color:#fff;letter-spacing:.02em}
.tel-bar{height:5px;border-radius:4px;background:rgba(99,168,255,.16);overflow:hidden;margin-top:8px}
.tel-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--blue-500),var(--cyan));border-radius:4px}
.tel-note{margin-top:16px;font-size:12.5px;color:rgba(232,241,255,.6);border-left:2px solid rgba(60,224,255,.5);padding-left:12px}

/* ---------- 滚动字幕条 ---------- */
.ticker{position:relative;background:linear-gradient(90deg,var(--blue-700),var(--blue-500));color:#fff;overflow:hidden;padding:11px 0;border-top:1px solid rgba(255,255,255,.2)}
.ticker-track{display:flex;width:max-content;animation:marquee 42s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker-group{display:flex;align-items:center;gap:34px;padding-right:34px}
.ticker-group span{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;white-space:nowrap;opacity:.95}
.ticker-group span::before{content:"◆";color:var(--cyan);margin-right:9px;font-size:8px;vertical-align:middle}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- 区块与排版 ---------- */
.section{padding:clamp(58px,7vw,104px) 0}
.section-tight{padding:clamp(40px,5vw,68px) 0}
.section-dark{background:linear-gradient(165deg,var(--navy-800),var(--navy-900));color:#e8f1ff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:rgba(232,241,255,.78)}
.section-head{max-width:760px;margin-bottom:clamp(28px,3.4vw,48px)}
.section-head h2{font-size:clamp(26px,3.6vw,40px)}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}
.section-dark .section-head p{color:rgba(232,241,255,.74)}
.rule{height:1px;background:linear-gradient(90deg,var(--blue-500),rgba(99,168,255,.05));margin:0 0 clamp(28px,3vw,42px)}
.grid{display:grid;gap:clamp(16px,1.8vw,22px)}
.g-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g-4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- 卡片 ---------- */
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,2.2vw,26px);box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--blue-600),var(--cyan));transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(20,97,204,.32)}
.card:hover::before{transform:scaleX(1)}
.card h3{font-size:18.5px;margin-bottom:9px}
.card p{color:var(--muted);font-size:15px}
.card-index{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-600);margin-bottom:14px}
.card-index i{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:var(--blue-100);color:var(--blue-700);font-style:normal;font-size:11.5px;font-weight:700}
.card-dark{background:linear-gradient(165deg,rgba(18,51,99,.72),rgba(5,18,43,.86));border-color:rgba(99,168,255,.26);color:#e8f1ff}
.card-dark h3{color:#fff}
.card-dark p{color:rgba(232,241,255,.75)}
.card-dark .card-index{color:var(--blue-400)}
.card-dark .card-index i{background:rgba(99,168,255,.18);color:var(--cyan)}
.card-dark:hover{border-color:rgba(60,224,255,.5)}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;padding:4px 10px;border-radius:999px;background:rgba(20,97,204,.09);color:var(--blue-700);border:1px solid rgba(20,97,204,.18)}
.section-dark .tag,.card-dark .tag{background:rgba(99,168,255,.14);color:var(--blue-400);border-color:rgba(99,168,255,.3)}
.card-outcome{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-2);font-size:13.5px;color:var(--navy-700)}
.card-dark .card-outcome{border-color:rgba(99,168,255,.3);color:rgba(232,241,255,.8)}
.card-outcome b{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--blue-600);text-transform:uppercase;margin-right:8px}
.card-dark .card-outcome b{color:var(--cyan)}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:rgba(99,168,255,.22);border-radius:var(--radius);overflow:hidden;border:1px solid rgba(99,168,255,.22)}
.stat{background:rgba(5,18,43,.72);padding:clamp(20px,2.4vw,30px)}
.stat b{display:block;font-family:var(--font-mono);font-size:clamp(28px,3.6vw,42px);color:#fff;line-height:1}
.stat b i{font-style:normal;font-size:14px;color:var(--cyan);margin-left:6px;letter-spacing:.04em}
.stat span{display:block;margin-top:10px;font-size:13.5px;color:rgba(232,241,255,.7)}

/* ---------- 列表 / 议题 ---------- */
.checks{display:grid;gap:12px}
.checks li{position:relative;padding-left:30px;font-size:15.5px;color:var(--muted)}
.checks li::before{content:"";position:absolute;left:0;top:9px;width:14px;height:8px;border-left:2px solid var(--blue-500);border-bottom:2px solid var(--blue-500);transform:rotate(-45deg)}
.section-dark .checks li{color:rgba(232,241,255,.8)}
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{display:inline-flex;align-items:center;gap:9px;padding:9px 15px;border-radius:999px;background:#fff;border:1px solid var(--line-2);font-size:14px;font-weight:600;color:var(--navy-700);box-shadow:var(--shadow-sm)}
.chip b{font-family:var(--font-mono);font-size:11.5px;color:var(--blue-600)}
.qlist{display:grid;gap:14px}
.qlist li{display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue-500);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-sm)}
.qlist .q{font-family:var(--font-mono);font-size:12px;color:var(--blue-600);padding-top:3px}
.qlist strong{display:block;font-size:15.5px;margin-bottom:4px}
.qlist p{font-size:14.5px;color:var(--muted)}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;display:grid;gap:20px;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--cyan),var(--blue-600),rgba(99,168,255,.2))}
.timeline li{position:relative}
.timeline li::before{content:"";position:absolute;left:-28px;top:8px;width:16px;height:16px;border-radius:50%;background:var(--navy-800);border:3px solid var(--blue-500);box-shadow:0 0 0 4px rgba(43,128,239,.18)}
.timeline .when{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-400)}
.timeline strong{display:block;margin:4px 0 6px;font-size:17px;color:#fff}
.timeline p{color:rgba(232,241,255,.76);font-size:15px}
.section .timeline .when{color:var(--blue-600)}
.section .timeline strong{color:var(--ink)}
.section .timeline p{color:var(--muted)}
.section .timeline li::before{background:#fff}

/* ---------- 投资模拟器 ---------- */
.sim{background:linear-gradient(165deg,var(--navy-800),var(--navy-900));border:1px solid rgba(99,168,255,.28);border-radius:22px;padding:clamp(22px,3vw,34px);color:#e8f1ff}
.sim-head{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:flex-end;padding-bottom:20px;border-bottom:1px dashed rgba(99,168,255,.3)}
.sim-head h3{font-size:clamp(20px,2.4vw,26px);color:#fff}
.sim-head p{margin-top:8px;color:rgba(232,241,255,.72);font-size:14.5px;max-width:52ch}
.sim-total{text-align:right}
.sim-total b{display:block;font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);color:var(--cyan);line-height:1.1}
.sim-total span{font-size:12.5px;color:rgba(232,241,255,.66)}
.sim-total.is-over b{color:#ff9a6b}
.sim-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:clamp(20px,3vw,38px);margin-top:24px}
.sim-controls{display:grid;gap:18px}
.sim-row label{display:flex;justify-content:space-between;align-items:baseline;gap:12px;font-size:14.5px;color:rgba(232,241,255,.88);font-weight:600}
.sim-row label b{font-family:var(--font-mono);font-size:14px;color:var(--cyan)}
input[type="range"]{-webkit-appearance:none;appearance:none;width:100%;height:6px;margin:12px 0 0;border-radius:6px;background:rgba(99,168,255,.22);cursor:pointer}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:linear-gradient(140deg,#fff,var(--cyan));border:2px solid var(--blue-500);box-shadow:0 4px 12px -4px rgba(0,0,0,.8)}
input[type="range"]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:#fff;border:2px solid var(--blue-500)}
.sim-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.sim-actions button{padding:9px 15px;font-size:13.5px;border-radius:9px;border:1px solid rgba(99,168,255,.4);background:rgba(99,168,255,.12);color:#e8f1ff;cursor:pointer;font-weight:600;transition:background .2s,border-color .2s}
.sim-actions button:hover{background:rgba(99,168,255,.24);border-color:var(--cyan)}
.sim-chart{display:grid;gap:14px;align-content:start}
.stack{display:flex;height:14px;border-radius:8px;overflow:hidden;background:rgba(99,168,255,.16);box-shadow:inset 0 0 0 1px rgba(99,168,255,.24)}
.stack i{display:block;height:100%;transition:width .25s ease}
.legend{display:grid;gap:9px;font-size:13.5px}
.legend li{display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:center;color:rgba(232,241,255,.82)}
.legend .swatch{width:11px;height:11px;border-radius:3px}
.legend b{font-family:var(--font-mono);color:#fff;font-size:13px}
.sim-note{grid-column:1/-1;margin-top:6px;font-size:12.5px;color:rgba(232,241,255,.6)}

/* ---------- 选题库 / 筛选 ---------- */
.filters{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.filter-btn{padding:9px 16px;border-radius:999px;border:1px solid var(--line-2);background:#fff;color:var(--navy-700);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s ease}
.filter-btn:hover{border-color:var(--blue-500);color:var(--blue-700)}
.filter-btn.is-active{background:linear-gradient(120deg,var(--blue-600),var(--blue-500));border-color:transparent;color:#fff;box-shadow:0 12px 24px -16px rgba(20,97,204,1)}
.topic{display:flex;flex-direction:column;gap:12px}
.topic h3{font-size:16.5px}
.topic p{font-size:14.5px}
.topic-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.topic[hidden]{display:none}
.empty-state{padding:28px;text-align:center;color:var(--muted);border:1px dashed var(--line-2);border-radius:var(--radius);background:#fff}

/* ---------- 团队 ---------- */
.people{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.person{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-sm)}
.person .role{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-600)}
.person strong{display:block;margin-top:6px;font-size:17px}
.person span{font-size:13px;color:var(--muted)}
.person-lead{border-color:rgba(20,97,204,.4);background:linear-gradient(165deg,#fff,#eef4ff)}

/* ---------- 下载 / CTA ---------- */
.doc-band{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;background:linear-gradient(120deg,rgba(20,97,204,.1),rgba(60,224,255,.08));border:1px solid rgba(20,97,204,.24);border-radius:var(--radius);padding:clamp(20px,2.6vw,30px)}
.doc-band h3{font-size:19px;margin-bottom:6px}
.doc-band p{color:var(--muted);font-size:14.5px}
.doc-meta{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--blue-600);margin-top:10px;display:block}
.cta{position:relative;overflow:hidden;background:linear-gradient(130deg,var(--blue-700),var(--blue-500) 60%,#1a9fe0);border-radius:22px;padding:clamp(28px,4vw,50px);color:#fff}
.cta::after{content:"";position:absolute;right:-70px;bottom:-90px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.24),transparent 66%)}
.cta h2{font-size:clamp(24px,3.2vw,34px);color:#fff}
.cta p{margin-top:14px;color:rgba(255,255,255,.86);max-width:62ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;position:relative;z-index:2}
.cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.12)}
.cta .btn-ghost:hover{color:var(--navy-800);background:#fff}
.cta .btn-light{background:#fff;color:var(--blue-700)}
.cta .btn-light:hover{color:var(--blue-700)}

/* ---------- 表单 ---------- */
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1/-1}
.field label{font-size:14px;font-weight:700;color:var(--navy-700)}
.field label .req{color:#d1434b;margin-left:4px}
.field .hint{font-size:12.5px;color:var(--muted)}
.field input[type="text"],.field input[type="email"],.field input[type="tel"],.field textarea,.field select{
  width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line-2);background:#fff;color:var(--ink);font:inherit;font-size:15px;transition:border-color .2s,box-shadow .2s}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue-500);box-shadow:0 0 0 4px rgba(43,128,239,.16)}
.field.has-error input,.field.has-error textarea,.field.has-error .check-set{border-color:#d1434b;box-shadow:0 0 0 4px rgba(209,67,75,.12)}
.error-msg{font-size:12.5px;color:#c83741;font-weight:600;min-height:0}
.check-set{display:flex;flex-wrap:wrap;gap:10px}
.check-pill{display:inline-flex;align-items:center;gap:9px;padding:10px 15px;border-radius:999px;border:1px solid var(--line-2);background:#fff;font-size:14px;cursor:pointer;transition:all .18s ease;user-select:none}
.check-pill:hover{border-color:var(--blue-500)}
.check-pill input{accent-color:var(--blue-600);width:16px;height:16px}
.check-pill:has(input:checked){background:var(--blue-100);border-color:var(--blue-500);color:var(--blue-700);font-weight:700}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:26px}
.form-note{font-size:13px;color:var(--muted);max-width:52ch}
.card-result{margin-top:26px;border-radius:var(--radius);border:1px solid rgba(20,97,204,.3);background:linear-gradient(165deg,#f6faff,#eaf2ff);padding:clamp(20px,2.4vw,28px)}
.card-result h3{font-size:19px;margin-bottom:6px}
.card-result pre{margin:16px 0 0;white-space:pre-wrap;font-family:var(--font-mono);font-size:13.5px;line-height:1.8;background:#fff;border:1px dashed var(--line-2);border-radius:12px;padding:16px;color:var(--navy-700)}
.result-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.faq{display:grid;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-sm)}
.faq summary{cursor:pointer;font-weight:700;font-size:15.5px;display:flex;justify-content:space-between;gap:14px;align-items:center;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--font-mono);color:var(--blue-600);font-size:19px;line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details p{margin-top:12px;color:var(--muted);font-size:14.5px}

/* ---------- 页脚 ---------- */
.flag-strip{height:14px;background:
  repeating-conic-gradient(from 0deg,var(--navy-800) 0 25%,#ffffff 0 50%);
  background-size:14px 14px;opacity:.9}
.site-footer{background:var(--navy-900);color:rgba(232,241,255,.76);padding:clamp(40px,5vw,64px) 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:clamp(20px,3vw,40px)}
.site-footer h4{color:#fff;font-size:14px;letter-spacing:.06em;margin-bottom:14px;font-family:var(--font-mono);text-transform:uppercase}
.site-footer p,.site-footer li{font-size:14px}
.site-footer a{color:rgba(232,241,255,.78)}
.site-footer a:hover{color:var(--cyan)}
.footer-links{display:grid;gap:9px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:clamp(28px,3.4vw,46px);padding-top:20px;border-top:1px solid rgba(99,168,255,.2);font-size:12.5px;color:rgba(232,241,255,.55);font-family:var(--font-mono);letter-spacing:.04em}

/* ---------- 回顶 ---------- */
.to-top{position:fixed;right:clamp(14px,2.4vw,28px);bottom:clamp(14px,2.4vw,28px);z-index:90;width:46px;height:46px;border-radius:14px;border:1px solid rgba(99,168,255,.4);background:linear-gradient(140deg,var(--blue-600),var(--navy-700));color:#fff;cursor:pointer;display:grid;place-items:center;box-shadow:0 18px 34px -18px rgba(2,8,20,.9);opacity:0;visibility:hidden;transform:translateY(12px);transition:all .25s ease}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(18px)}
.reveal.is-in{opacity:1;transform:none;transition:opacity .6s ease var(--d,0s),transform .6s cubic-bezier(.22,.68,.3,1) var(--d,0s)}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* ---------- 子页面头部 ---------- */
.page-hero{position:relative;overflow:hidden;color:#e8f1ff;padding:clamp(46px,6vw,78px) 0 clamp(40px,5vw,62px);
  background:radial-gradient(900px 420px at 88% -20%,rgba(43,128,239,.4),transparent 62%),linear-gradient(168deg,var(--navy-900),var(--navy-800) 60%,var(--navy-700))}
.page-hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(99,168,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(99,168,255,.08) 1px,transparent 1px);
  background-size:56px 56px;mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent);-webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.9),transparent)}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:clamp(28px,4.4vw,48px)}
.page-hero .lede{margin-top:16px;max-width:66ch;color:rgba(232,241,255,.82);font-size:clamp(15px,1.4vw,17px)}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-400);margin-bottom:18px}
.crumbs a{color:var(--blue-400)}
.crumbs a:hover{color:var(--cyan)}
.crumbs span[aria-hidden]{color:rgba(99,168,255,.5)}
.page-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--blue-400)}
.lede-block{font-size:clamp(16px,1.5vw,18.5px);line-height:1.9;color:var(--navy-700)}
.lede-block strong{color:var(--ink)}
.quote-card{position:relative;border-radius:var(--radius);border:1px solid var(--line);background:#fff;padding:clamp(22px,3vw,38px);box-shadow:var(--shadow-sm)}
.quote-card::before{content:"“";position:absolute;left:clamp(10px,1.6vw,18px);top:-4px;font-size:74px;line-height:1;color:rgba(43,128,239,.16);font-weight:800}
.quote-card p+p{margin-top:16px}
.fact-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.fact-list div{display:flex;flex-wrap:wrap;gap:8px 18px;justify-content:space-between;align-items:baseline;background:#fff;padding:15px 18px}
.fact-list dt,.fact-list span:first-child{font-size:14px;color:var(--muted)}
.fact-list b{font-family:var(--font-mono);font-size:15px;color:var(--navy-800)}
.two-col{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(24px,3.4vw,48px);align-items:start}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .two-col{grid-template-columns:1fr}
  .hero-inner{grid-template-columns:1fr}
  .hero-circuit{opacity:.32;top:auto;bottom:-30px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sim-body{grid-template-columns:1fr}
  .g-4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:4px;background:rgba(5,18,43,.98);border-bottom:1px solid rgba(99,168,255,.25);padding:14px clamp(18px,4vw,34px) 20px;display:none}
  .site-nav.is-open{display:flex}
  .site-nav a{padding:12px 14px}
  .site-nav a.btn{margin:8px 0 0;justify-content:center}
  .g-3,.g-2{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .form-grid{grid-template-columns:1fr}
}
@media (max-width:560px){
  body{font-size:16px}
  .hero{padding-top:44px}
  .brand-text strong{font-size:14px}
  .brand-text em{display:none}
  .stats{grid-template-columns:1fr}
  .g-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .qlist li{grid-template-columns:1fr;gap:6px}
  .doc-band{flex-direction:column;align-items:stretch}
  .btn{width:100%;justify-content:center}
  .hero-actions .btn,.cta-actions .btn{width:auto}
}

/* ---------- 赛季观察 ---------- */
.board{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(0,.98fr);gap:clamp(18px,2.6vw,32px);align-items:start}
.countdown{border-radius:22px;border:1px solid rgba(99,168,255,.3);background:linear-gradient(165deg,rgba(18,51,99,.62),rgba(5,18,43,.88));padding:clamp(22px,2.8vw,30px);position:relative;overflow:hidden}
.countdown::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:linear-gradient(90deg,var(--cyan),var(--blue-500),transparent)}
.countdown .cd-label{display:block;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--blue-400)}
.countdown .cd-race{margin-top:12px;font-size:16px;font-weight:700;color:#fff}
.countdown .cd-clock{display:flex;align-items:baseline;gap:10px;margin-top:14px}
.countdown .cd-num{font-family:var(--font-mono);font-size:clamp(40px,6.4vw,64px);line-height:1;color:var(--cyan);font-weight:800}
.countdown .cd-unit{font-size:13.5px;color:rgba(232,241,255,.72)}
.countdown .cd-list{margin-top:20px;padding-top:18px;border-top:1px dashed rgba(99,168,255,.3)}

.race-card{display:flex;flex-direction:column}
.race-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.race-head .card-index{margin-bottom:0}
.race-status{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;padding:4px 10px;border-radius:999px;border:1px solid var(--line-2);background:#f1f5fc;color:var(--muted);white-space:nowrap}
.race-status.is-next{border-color:rgba(20,97,204,.42);background:var(--blue-100);color:var(--blue-700)}
.race-status.is-live{border-color:rgba(60,224,255,.6);background:rgba(60,224,255,.16);color:#0b6f8a}
.race-status.is-done{border-color:var(--line-2);background:#f4f6fa;color:var(--muted)}
.race-card.is-done-card{border-left:3px solid var(--line-2)}
.race-when{margin-top:12px;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--blue-600)}
.race-tasks{display:grid;gap:8px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--line-2)}
.race-tasks li{position:relative;padding-left:22px;font-size:14px;color:var(--muted)}
.card-dark .race-when{color:var(--blue-400)}
.card-dark .race-tasks{border-top-color:rgba(99,168,255,.3)}
.card-dark .race-tasks li{color:rgba(232,241,255,.78)}
.card-dark .race-tasks li::before{border-color:var(--cyan)}
.card-dark.is-done-card{border-left:3px solid rgba(99,168,255,.35)}
.race-tasks li::before{content:"";position:absolute;left:0;top:8px;width:11px;height:6px;border-left:2px solid var(--blue-500);border-bottom:2px solid var(--blue-500);transform:rotate(-45deg)}

.source-list{display:grid;gap:12px}
.source-item{display:grid;grid-template-columns:auto 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-left:3px solid var(--blue-500);border-radius:var(--radius-sm);padding:16px 18px;box-shadow:var(--shadow-sm)}
.source-item .src-idx{font-family:var(--font-mono);font-size:12px;color:var(--blue-600);padding-top:3px}
.source-item strong{display:block;font-size:15.5px;margin-bottom:4px}
.source-item p{font-size:14px;color:var(--muted)}
.source-item a{word-break:break-all;font-size:13.5px;font-family:var(--font-mono)}

@media (max-width:1000px){
  .board{grid-template-columns:1fr}
}
@media (max-width:1060px) and (min-width:861px){
  .brand-text em{display:none}
  .site-nav{gap:2px}
  .site-nav a{padding:9px 9px;font-size:13.5px}
  .site-nav a.btn{padding:9px 13px;font-size:13.5px}
}

/* ---------- 详情文档（站内可读版） ---------- */
.doc-toc{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.doc-toc a{display:inline-flex;align-items:center;gap:8px;padding:9px 15px;border-radius:999px;background:rgba(99,168,255,.12);border:1px solid rgba(99,168,255,.34);color:#eaf3ff;font-size:13.5px;font-weight:600}
.doc-toc a:hover{background:rgba(99,168,255,.24);border-color:var(--cyan);color:#fff}
.doc-toc a i{font-family:var(--font-mono);font-style:normal;font-size:11px;color:var(--cyan)}
.doc-h{display:flex;gap:14px;align-items:flex-start;margin-bottom:20px}
.doc-h .num{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--blue-600);padding-top:6px;flex:0 0 auto}
.doc-h h2{font-size:clamp(21px,2.7vw,29px)}
.doc-h p{margin-top:8px;font-size:15px;color:var(--muted);max-width:66ch}
.doc-note{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px dashed var(--line-2);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm)}
.doc-note .badge{flex:0 0 auto;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue-700);background:var(--blue-100);border-radius:8px;padding:6px 10px}
.doc-note strong{display:block;font-size:15.5px;margin-bottom:4px}
.doc-note p{font-size:14px;color:var(--muted)}
.doc-note p + p{margin-top:8px}
.doc-file{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;background:linear-gradient(120deg,rgba(20,97,204,.08),rgba(60,224,255,.07));border:1px solid rgba(20,97,204,.22);border-radius:var(--radius);padding:18px 20px}
.doc-file strong{display:block;font-size:15.5px}
.doc-file p{font-size:13.5px;color:var(--muted);word-break:break-all}
.doc-stack{display:grid;gap:14px}
@media (max-width:560px){
  .doc-h{flex-direction:column;gap:6px}
  .doc-note,.doc-file{flex-direction:column;align-items:stretch}
}
@media print{
  .site-header,.site-footer,.to-top,.doc-toc,.skip-link{display:none !important}
  body{background:#fff}
  .section,.section-tight{padding:14px 0}
  .card,.qlist li,.person,.doc-note,.doc-file,.doc-band{box-shadow:none}
}