/* ============================================================
   HO赛场 · 共享样式表 /assets/site.css
   夜场底绿 + 荧光柠檬黄 · 左侧品牌轨道 + 顶栏透明叠加导航
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;background:#0A1410}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}

/* ---------- 2. tokens ---------- */
:root{
  --green-night:#0A1410;
  --green-deep:#0E2A1F;
  --green-train:#14382A;
  --blue-night:#0D1B2E;
  --blue-soft:#16263D;
  --lime:#E8FF3A;
  --lime-dim:#B7CC2E;
  --heat-hot:#FF5A2B;
  --heat-cool:#35D0E0;
  --ink:#F2F6F1;
  --ink-muted:#9DAFA4;
  --hairline:rgba(232,255,58,.14);
  --hairline-strong:rgba(232,255,58,.30);
  --shadow-soft:0 1px 1px rgba(0,0,0,.35),0 18px 40px -34px rgba(0,0,0,.95);
  --rail-w:220px;
  --bar-h:72px;
  --shell-max:1280px;
  --radius:2px;
  --step:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-num:ui-monospace,"SFMono-Regular","SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

/* ---------- 3. base ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--green-night);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(232,255,58,.035) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(232,255,58,.035) 1px,transparent 1px);
  background-size:80px 80px;
  -webkit-mask-image:radial-gradient(120% 85% at 74% 0%,#000 0%,rgba(0,0,0,.25) 55%,transparent 78%);
  mask-image:radial-gradient(120% 85% at 74% 0%,#000 0%,rgba(0,0,0,.25) 55%,transparent 78%);
}
body::after{
  content:"";position:fixed;inset:0 0 auto 0;height:440px;z-index:0;pointer-events:none;
  background:radial-gradient(78% 100% at 80% 0%,rgba(232,255,58,.10),transparent 62%);
}
h1,h2,h3,h4{font-weight:800;line-height:1.05;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(32px,4.4vw,64px);letter-spacing:-.03em}
h2{font-size:clamp(24px,2.7vw,32px)}
h3{font-size:clamp(19px,1.6vw,22px);font-weight:700;letter-spacing:-.01em}
h4{font-size:17px;font-weight:700;letter-spacing:0}
::selection{background:var(--lime);color:#0A1410}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:1px}
#main-content{outline:none}

/* ---------- 4. 骨架与栅格 ---------- */
.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:clamp(20px,3vw,48px)}
.site-main{position:relative;z-index:1}
.section{position:relative;padding-block:clamp(52px,7vw,104px)}
.section--lead{padding-top:calc(var(--bar-h) + clamp(48px,7vw,96px))}
.section--tight{padding-block:clamp(32px,4vw,56px)}
.grid{display:grid;gap:clamp(20px,2.6vw,36px)}
.grid--7-5{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--5-7{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

/* ---------- 5. 文本层级 ---------- */
.display{font-size:clamp(32px,4.4vw,64px);font-weight:800;line-height:1.05;letter-spacing:-.03em}
.section-title{font-size:clamp(24px,2.7vw,32px);font-weight:800;line-height:1.1}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-num);font-size:12px;letter-spacing:.2em;color:var(--lime);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--lime)}
.lede{max-width:62ch;font-size:clamp(16px,1.35vw,18px);line-height:1.85;color:var(--ink-muted)}

/* ---------- 6. 按钮与标签 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border:1px solid transparent;border-radius:var(--radius);font-size:14px;font-weight:700;line-height:1;letter-spacing:.02em;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .12s var(--ease)}
.btn--primary{background:var(--lime);color:#0A1410}
.btn--primary:hover{background:#F6FFB0}
.btn--primary:active{background:var(--lime-dim);transform:translateY(1px)}
.btn--ghost{border-color:var(--hairline-strong);color:var(--ink)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--sm{padding:8px 13px;font-size:12.5px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border:1px solid var(--hairline);border-radius:var(--radius);font-family:var(--font-num);font-size:11px;letter-spacing:.08em;color:var(--ink-muted)}
.tag--lime{color:var(--lime);border-color:var(--hairline-strong)}
.tag--hot{color:var(--heat-hot);border-color:rgba(255,90,43,.4)}
.tag--cool{color:var(--heat-cool);border-color:rgba(53,208,224,.4)}

/* ---------- 7. 卡片 / 数字 / 列表 / 分隔 ---------- */
.card{position:relative;padding:clamp(20px,2.2vw,30px);background:var(--green-deep);border:1px solid var(--hairline);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
.card--blue{background:var(--blue-night)}
.card--tight{padding:18px}
.card__label{display:block;margin-bottom:12px;font-family:var(--font-num);font-size:11px;letter-spacing:.16em;color:var(--ink-muted)}
.card__title{margin-bottom:10px;font-size:19px;font-weight:700;letter-spacing:-.01em}
.card__text{font-size:15px;line-height:1.8;color:var(--ink-muted)}
.stat{display:flex;flex-direction:column;gap:4px}
.stat__value{font-family:var(--font-num);font-variant-numeric:tabular-nums;font-size:clamp(36px,4vw,52px);font-weight:700;line-height:1;letter-spacing:-.02em;color:var(--lime)}
.stat__value--hot{color:var(--heat-hot)}
.stat__value--cool{color:var(--heat-cool)}
.stat__unit{font-size:13px;letter-spacing:.1em;color:var(--ink-muted)}
.rule{height:1px;border:0;background:var(--hairline);margin-block:clamp(32px,5vw,72px)}
.rule--slant{transform:rotate(-.7deg);transform-origin:left center}
.list-check{display:flex;flex-direction:column;gap:12px}
.list-check li{position:relative;padding-left:26px;font-size:15.5px;color:var(--ink-muted)}
.list-check li::before{content:"";position:absolute;left:0;top:.78em;width:12px;height:1px;background:var(--lime)}

/* ---------- 8. 图文容器（图片占位） ---------- */
.media{position:relative;display:block;overflow:hidden;aspect-ratio:16/9;border:1px solid var(--hairline);border-radius:var(--radius);background:linear-gradient(135deg,var(--green-train),var(--blue-night))}
.media::before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(to right,rgba(232,255,58,.07) 1px,transparent 1px),linear-gradient(to bottom,rgba(232,255,58,.07) 1px,transparent 1px);background-size:40px 40px}
.media--wide{aspect-ratio:21/9}
.media--square{aspect-ratio:1/1}
.media--tall{aspect-ratio:4/5}
.media__img{position:relative;width:100%;height:100%;object-fit:cover}
.media__overlay{position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:13px;letter-spacing:.02em;color:var(--ink);background:linear-gradient(to top,rgba(10,20,16,.94),rgba(10,20,16,0))}
.media__caption{padding:10px 2px 0;font-size:13px;color:var(--ink-muted)}

/* ---------- 9. 面包屑与章节索引 ---------- */
.breadcrumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding-top:calc(var(--bar-h) + 28px);font-family:var(--font-num);font-size:12px;letter-spacing:.08em;color:var(--ink-muted)}
.breadcrumbs__item{display:inline-flex;align-items:center;gap:10px}
.breadcrumbs__link{color:var(--ink-muted);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.breadcrumbs__link:hover{color:var(--lime);border-color:var(--hairline-strong)}
.breadcrumbs__sep{color:var(--hairline-strong)}
.section-nav{position:sticky;top:calc(var(--bar-h) + 20px);display:flex;flex-direction:column;gap:2px;padding-left:14px;border-left:1px solid var(--hairline)}
.section-nav__link{display:block;padding:6px 0;font-size:14px;color:var(--ink-muted);transition:color .2s var(--ease)}
.section-nav__link:hover{color:var(--ink)}
.section-nav__link[aria-current]{color:var(--lime)}

/* ---------- 10. 显现协议 ---------- */
html.js-ready [data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .35s var(--ease),transform .35s var(--ease)}
html.js-ready [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. 顶栏 ---------- */
.skip-link{position:fixed;left:50%;top:-70px;transform:translateX(-50%);z-index:200;padding:10px 22px;background:var(--lime);color:#0A1410;font-size:14px;font-weight:700;border-radius:0 0 var(--radius) var(--radius);transition:top .2s var(--ease)}
.skip-link:focus{top:0}

.site-header{
  position:fixed;top:0;left:var(--rail-w);right:0;z-index:60;
  border-bottom:1px solid transparent;
  background:linear-gradient(to bottom,rgba(10,20,16,.80) 0%,rgba(10,20,16,.38) 62%,rgba(10,20,16,0) 100%);
  transition:background .32s var(--ease),border-color .32s var(--ease),box-shadow .32s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(14,42,31,.97);
  border-bottom-color:var(--hairline);
  box-shadow:0 12px 34px -26px rgba(0,0,0,.95);
}
.header-bar{height:var(--bar-h)}
.header-bar .shell{display:flex;align-items:center;gap:clamp(12px,2vw,30px);height:100%}

/* 品牌 */
.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__mark{display:grid;place-items:center;width:38px;height:38px;background:var(--green-deep);border:1px solid var(--hairline-strong);border-radius:var(--radius);color:var(--lime);font-family:var(--font-num);font-size:15px;font-weight:700;letter-spacing:.04em}
.brand__text{display:flex;flex-direction:column;gap:1px}
.brand__name{font-size:19px;font-weight:800;line-height:1.15;letter-spacing:.01em}
.brand__tag{font-family:var(--font-num);font-size:11px;letter-spacing:.14em;color:var(--ink-muted)}

/* 主导航 */
.primary-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(6px,1.4vw,22px)}
.nav-link{position:relative;display:inline-block;padding:8px 2px;font-size:15px;font-weight:600;color:rgba(242,246,241,.78);transition:color .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--lime);transform:scaleX(0);transform-origin:left center;transition:transform .25s var(--ease)}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--lime)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* 头栏行动 */
.header-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* 移动按钮 */
.nav-toggle{display:none;align-items:center;gap:10px;flex:0 0 auto;padding:10px 14px;background:rgba(14,42,31,.72);border:1px solid var(--hairline-strong);border-radius:var(--radius);color:var(--ink);font-size:13px;font-weight:700;letter-spacing:.08em}
.nav-toggle__icon{position:relative;display:inline-block;width:18px;height:14px}
.nav-toggle__icon::before,.nav-toggle__icon::after{content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.nav-toggle__icon::before{top:3px;box-shadow:0 4px 0 currentColor}
.nav-toggle__icon::after{bottom:3px}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before{box-shadow:0 4px 0 rgba(0,0,0,0);transform:translateY(4px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after{transform:translateY(-4px) rotate(-45deg)}
.nav-toggle__label{font-family:var(--font-num);letter-spacing:.16em}

/* 阅读进度 */
.progress-line{position:absolute;left:0;right:0;bottom:-1px;height:2px;overflow:hidden;background:rgba(232,255,58,.07)}
.progress-line__fill{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--lime-dim),var(--lime));transition:width .12s linear}

/* ---------- 12. 左侧品牌轨道 ---------- */
.brand-rail{
  position:fixed;top:0;left:0;bottom:0;width:var(--rail-w);z-index:55;
  display:flex;flex-direction:column;align-items:center;gap:26px;
  padding:calc(var(--bar-h) + 26px) 18px 26px;overflow:hidden;
  background:linear-gradient(180deg,var(--blue-night) 0%,var(--green-night) 74%);
  border-right:1px solid var(--hairline);
}
.brand-rail::before{content:"";position:absolute;left:0;right:0;top:var(--bar-h);height:1px;background:var(--hairline)}
.rail-brand{
  writing-mode:vertical-rl;max-height:200px;padding-left:12px;
  border-left:1px solid var(--hairline);
  font-family:var(--font-num);font-size:11px;letter-spacing:.42em;color:rgba(157,175,164,.88);
}
.rail-ticks{display:flex;flex-direction:column;gap:16px;width:100%;padding-top:14px;border-top:1px solid var(--hairline)}
.rail-tick{display:flex;align-items:center;gap:9px;white-space:nowrap;font-family:var(--font-num);font-size:10.5px;letter-spacing:.12em;color:var(--ink-muted)}
.rail-tick__mark{flex:0 0 auto;width:12px;height:1px;background:var(--hairline-strong)}
.rail-tick__label{display:inline-block;font-family:var(--font-num)}
.rail-tick--live .rail-tick__mark{width:22px;background:var(--lime);box-shadow:0 0 0 1px rgba(232,255,58,.18)}
.rail-tick--live .rail-tick__label{color:var(--lime)}
.rail-foot{margin-top:auto;width:100%;padding-top:16px;border-top:1px solid var(--hairline);text-align:center;font-family:var(--font-num);font-size:10.5px;line-height:2;letter-spacing:.16em;color:var(--ink-muted)}

/* ---------- 13. 页脚 ---------- */
.site-footer{position:relative;z-index:1;margin-top:clamp(64px,9vw,120px);border-top:1px solid var(--hairline);background:linear-gradient(180deg,var(--green-deep) 0%,var(--green-night) 68%)}
.footer-heat{height:6px;background:linear-gradient(90deg,var(--heat-cool) 0%,#7FE3C8 26%,var(--lime) 50%,#FFB02B 74%,var(--heat-hot) 100%)}
.footer-shell{display:grid;grid-template-columns:minmax(260px,1fr) minmax(0,2.1fr);gap:clamp(24px,4vw,64px);padding-block:clamp(44px,6vw,80px)}
.footer-lead{display:flex;flex-direction:column;gap:18px;max-width:46ch}
.footer-copy{font-size:15px;line-height:1.85;color:var(--ink-muted)}
.footer-legend{display:flex;justify-content:space-between;font-family:var(--font-num);font-size:11px;letter-spacing:.12em;color:var(--ink-muted)}
.footer-cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(16px,2.2vw,32px)}
.footer-col__title{margin-bottom:14px;font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--lime)}
.footer-list{display:flex;flex-direction:column;gap:10px}
.footer-link{display:inline-block;font-size:14.5px;color:rgba(242,246,241,.74);border-bottom:1px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease)}
.footer-link:hover{color:var(--lime);border-bottom-color:var(--hairline-strong)}
.footer-list--contact li{font-family:var(--font-num);font-size:12.5px;line-height:1.9;letter-spacing:.02em;color:var(--ink-muted);word-break:break-word}
.footer-base{display:flex;flex-wrap:wrap;align-items:flex-start;justify-content:space-between;gap:12px 28px;padding-block:22px 34px;border-top:1px solid var(--hairline);font-size:13px;color:var(--ink-muted)}
.footer-legal{font-family:var(--font-num);letter-spacing:.04em}
.footer-note{max-width:62ch;line-height:1.75}

/* ---------- 14. 断点 ---------- */
@media (max-width:1320px){
  .header-cta .btn--ghost{display:none}
}
@media (max-width:1280px){
  :root{--rail-w:176px}
  .rail-brand{letter-spacing:.3em;font-size:10.5px}
}
@media (max-width:1080px){
  :root{--rail-w:0px;--bar-h:64px}
  .brand-rail{display:none}
  .nav-toggle{display:inline-flex}
  .primary-nav{
    position:fixed;left:0;right:0;top:auto;bottom:0;z-index:80;margin-left:0;
    max-height:80vh;overflow:auto;visibility:hidden;transform:translateY(102%);
    background:var(--blue-soft);border-top:1px solid var(--hairline-strong);
    padding:20px clamp(18px,5vw,36px) calc(24px + env(safe-area-inset-bottom,0px));
    box-shadow:0 -22px 50px -30px rgba(0,0,0,.95);
    transition:transform .34s var(--ease),visibility .34s var(--ease);
  }
  .primary-nav[data-open]{visibility:visible;transform:translateY(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{padding:15px 2px;font-size:17px;border-bottom:1px solid var(--hairline)}
  .nav-link::after{display:none}
  .nav-link[aria-current="page"]{padding-left:12px;background:linear-gradient(90deg,rgba(232,255,58,.12),transparent 72%)}
  .grid--7-5,.grid--5-7,.grid--3,.grid--2{grid-template-columns:minmax(0,1fr)}
  .footer-shell{grid-template-columns:minmax(0,1fr)}
  .section-nav{position:static;flex-direction:row;flex-wrap:wrap;gap:16px;padding-left:0;border-left:0}
}
@media (max-width:900px){
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 20px}
}
@media (max-width:720px){
  body{font-size:16px;line-height:1.8}
  .brand__tag{display:none}
  .brand__mark{width:34px;height:34px;font-size:14px}
  .header-bar .shell{gap:10px}
  .header-cta .btn--primary{padding:9px 12px;font-size:12.5px}
  .footer-cols{grid-template-columns:minmax(0,1fr)}
  .footer-base{flex-direction:column;gap:10px}
}
@media (max-width:420px){
  .header-cta{display:none}
}

/* ---------- 15. 减少动态 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  html.js-ready [data-reveal]{opacity:1;transform:none}
  .primary-nav{transition:none}
}