/* ==========================================================================
   HTH赛事入口 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --abyss-950:#030F1A;
  --abyss-800:#071F33;
  --abyss-600:#0E3350;
  --cyan-400:#2BF0D0;
  --cyan-200:#A8F7E8;
  --orange-500:#FF5A2C;
  --orange-300:#FF9A6B;
  --mist-100:#E6F2F6;
  --paper-050:#F4FAFC;
  --line-400:#4E7186;
  --ink-900:#0A1620;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC",system-ui,sans-serif;
  --font-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell-max:1320px;
  --pad-inline:clamp(16px,4vw,48px);

  --radius-organic:26px 8px 26px 8px;
  --radius-soft:18px;
  --radius-chip:999px;

  --dur-hover:160ms;
  --dur-flash:240ms;

  --hairline:1px solid rgba(78,113,134,.32);
  --hairline-cyan:1px solid rgba(43,240,208,.22);

  --text-soft:rgba(230,242,246,.72);
  --text-dim:rgba(230,242,246,.52);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  background:var(--abyss-950);
  color:var(--mist-100);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
a{color:var(--cyan-200);text-decoration:none}
a:hover{color:var(--cyan-400)}
[hidden]{display:none !important}
hr{border:0;border-top:var(--hairline);margin:2em 0}

/* ---------- 3. 中文排版 ---------- */
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  margin:0 0 .55em;
  text-wrap:balance;
}
h1{font-size:clamp(34px,5vw,56px)}
h2{font-size:clamp(26px,3.4vw,40px)}
h3{font-size:clamp(20px,2.2vw,28px)}
h4{font-size:clamp(17px,1.6vw,20px);font-weight:800}
h5{font-size:16px;font-weight:800}
strong{font-weight:800;color:var(--mist-100)}
code,kbd,samp{font-family:var(--font-mono);font-size:.92em;color:var(--cyan-200)}
::selection{background:var(--cyan-400);color:var(--abyss-950)}

/* 焦点环：2px 橙红，保证键盘可达 */
:focus-visible{outline:2px solid var(--orange-500);outline-offset:2px;border-radius:4px}
:focus:not(:focus-visible){outline:none}

/* ---------- 4. 工具类 ---------- */
.container{
  width:100%;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--pad-inline);
}
.container--narrow{max-width:860px}
.sr-only{
  position:absolute;
  width:1px;height:1px;
  margin:-1px;padding:0;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}
.skip-link{
  position:absolute;
  top:-72px;left:16px;
  z-index:120;
  display:inline-block;
  padding:10px 18px;
  background:var(--orange-500);
  color:var(--ink-900);
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  border-radius:12px 3px 12px 3px;
  transition:top var(--dur-hover) ease;
}
.skip-link:focus{top:14px;color:var(--ink-900)}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:linear-gradient(180deg,#08243c 0%,#05192b 58%,var(--abyss-950) 100%);
  border-bottom:var(--hairline-cyan);
  box-shadow:0 12px 34px rgba(3,15,26,.55);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(620px 130px at 10% -60%,rgba(43,240,208,.20),transparent 72%);
  pointer-events:none;
}
.header-top__inner{
  position:relative;
  z-index:1;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding:14px var(--pad-inline);
  display:flex;
  align-items:center;
  gap:clamp(14px,2.4vw,32px);
  flex-wrap:wrap;
}

/* 品牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  color:var(--mist-100);
  text-decoration:none;
  flex:0 0 auto;
}
.brand:hover{color:var(--mist-100)}
.brand__mark{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:.1em;
  color:var(--abyss-950);
  background:var(--cyan-400);
  padding:9px 11px;
  border-radius:14px 4px 14px 4px;
  line-height:1;
}
.brand__text{display:flex;flex-direction:column;gap:2px}
.brand__name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(18px,1.8vw,21px);
  letter-spacing:-.02em;
  line-height:1.2;
}
.brand__tagline{
  font-size:12.5px;
  line-height:1.4;
  color:var(--cyan-200);
  opacity:.72;
}
.brand--footer .brand__tagline{opacity:.6}

/* 上层工具区 */
.header-utility{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}

/* 线路状态 */
.line-status{
  display:flex;
  align-items:center;
  gap:10px;
  padding:7px 12px;
  border:1px solid rgba(78,113,134,.5);
  border-radius:var(--radius-chip);
  background:rgba(3,15,26,.62);
}
.line-status__label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--text-dim);
}
.line-status__list{display:flex;align-items:center;gap:12px}
.line-status__item{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  line-height:1;
  color:rgba(230,242,246,.45);
  transition:color var(--dur-hover) ease;
}
.line-status__dot{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--line-400);
  box-shadow:none;
  transition:background-color var(--dur-hover) ease,box-shadow var(--dur-hover) ease;
}
.line-status__item.is-active{color:var(--mist-100)}
.line-status__item.is-active .line-status__dot{
  background:var(--cyan-400);
  box-shadow:0 0 0 4px rgba(43,240,208,.18);
}
.line-status__item.is-flashing .line-status__dot{
  animation:line-flash var(--dur-flash) steps(1,end) 3;
}
@keyframes line-flash{
  0%,49%{opacity:1}
  50%,100%{opacity:.12}
}

/* 栏目搜索 */
.header-search{position:relative;display:block}
.header-search__input{
  width:clamp(118px,17vw,178px);
  padding:10px 13px;
  background:rgba(3,15,26,.72);
  border:1px solid rgba(78,113,134,.55);
  border-radius:12px 3px 12px 3px;
  color:var(--mist-100);
  font-size:14px;
  line-height:1.3;
  transition:border-color var(--dur-hover) ease,background-color var(--dur-hover) ease;
}
.header-search__input::placeholder{color:rgba(230,242,246,.4)}
.header-search__input:focus{border-color:var(--cyan-400);background:rgba(3,15,26,.92)}
.header-search__hint{
  position:absolute;
  top:calc(100% + 6px);
  left:0;
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  line-height:1.4;
  color:var(--orange-300);
  white-space:nowrap;
}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 18px;
  border:1px solid transparent;
  border-radius:14px 4px 14px 4px;
  font-family:var(--font-display);
  font-weight:800;
  font-size:14px;
  line-height:1.1;
  text-decoration:none;
  cursor:pointer;
  background:none;
  transition:background-color var(--dur-hover) ease,color var(--dur-hover) ease,
             border-color var(--dur-hover) ease,transform var(--dur-hover) ease;
}
.btn--primary{background:var(--orange-500);color:var(--ink-900)}
.btn--primary:hover{background:var(--orange-300);color:var(--ink-900);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--cyan-200);border-color:rgba(43,240,208,.42)}
.btn--ghost:hover{background:rgba(43,240,208,.1);color:var(--cyan-400);border-color:var(--cyan-400)}
.btn--sm{padding:8px 13px;font-size:12.5px;border-radius:11px 3px 11px 3px}

/* 下层栏目条 */
.header-nav-bar{
  position:relative;
  z-index:1;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding:0 var(--pad-inline) 12px;
  display:flex;
  align-items:center;
  gap:12px;
}
.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  padding-bottom:2px;
  scrollbar-width:thin;
}
.site-nav__item{flex:0 0 auto}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:9px 15px;
  color:rgba(230,242,246,.7);
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  line-height:1.2;
  white-space:nowrap;
  border-radius:12px 3px 12px 3px;
  transition:color var(--dur-hover) ease,transform var(--dur-hover) ease,
             background-color var(--dur-hover) ease;
}
.site-nav__link::after{
  content:"";
  position:absolute;
  left:15px;right:15px;bottom:4px;
  height:2px;
  background:var(--cyan-400);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--dur-hover) ease;
}
.site-nav__link:hover{color:var(--cyan-400);transform:translateX(6px)}
.site-nav__link:hover::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{
  color:var(--abyss-950);
  background:var(--cyan-400);
  transform:none;
}
.site-nav__link[aria-current="page"]::after{transform:scaleX(0)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  background:rgba(43,240,208,.08);
  border:1px solid rgba(43,240,208,.38);
  border-radius:12px 3px 12px 3px;
  color:var(--cyan-200);
  font-family:var(--font-display);
  font-weight:800;
  font-size:13px;
  cursor:pointer;
  transition:background-color var(--dur-hover) ease,color var(--dur-hover) ease;
}
.nav-toggle:hover{background:rgba(43,240,208,.16);color:var(--cyan-400)}
.nav-toggle__bars{
  position:relative;
  display:inline-block;
  width:18px;height:12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;right:0;
  height:2px;
  background:currentColor;
  transition:transform var(--dur-hover) ease;
}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* ---------- 6. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(48px,7vw,104px);
  padding:clamp(40px,6vw,76px) 0 30px;
  background:linear-gradient(180deg,var(--abyss-800) 0%,#04162a 55%,var(--abyss-950) 100%);
  border-top:var(--hairline-cyan);
  color:var(--mist-100);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:auto -10% -60% 30%;
  height:320px;
  background:radial-gradient(closest-side,rgba(43,240,208,.14),transparent 76%);
  pointer-events:none;
}
.footer__inner{
  position:relative;
  z-index:1;
  max-width:var(--shell-max);
  margin-inline:auto;
  padding-inline:var(--pad-inline);
}
.footer__top{
  display:grid;
  gap:clamp(26px,4vw,52px);
  grid-template-columns:1fr;
}
.footer__brand{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.footer__brand-note{
  max-width:34ch;
  margin:0;
  font-size:14px;
  line-height:1.8;
  color:var(--text-dim);
}
.footer__grid{
  display:grid;
  gap:clamp(22px,3vw,38px);
  grid-template-columns:repeat(auto-fit,minmax(176px,1fr));
}
.footer__col{min-width:0}
.footer__col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.footer__list{display:flex;flex-direction:column;gap:9px}
.footer__link{
  display:inline-block;
  font-size:15px;
  line-height:1.6;
  color:rgba(230,242,246,.78);
  transition:color var(--dur-hover) ease,transform var(--dur-hover) ease;
}
.footer__link:hover{color:var(--cyan-400);transform:translateX(6px)}
.footer__link[aria-current="page"]{color:var(--cyan-400)}
.footer__notes{display:flex;flex-direction:column;gap:11px}
.footer__note{
  position:relative;
  padding-left:15px;
  font-size:14px;
  line-height:1.75;
  color:var(--text-dim);
}
.footer__note::before{
  content:"";
  position:absolute;
  left:0;top:.66em;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--orange-500);
}
.footer__bottom{
  margin-top:clamp(28px,4vw,50px);
  padding-top:22px;
  border-top:var(--hairline);
  display:flex;
  flex-wrap:wrap;
  gap:18px 34px;
  justify-content:space-between;
  align-items:flex-end;
}
.footer__contact{
  display:flex;
  flex-direction:column;
  gap:5px;
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1.7;
  color:var(--text-soft);
}
.footer__contact-row{display:block}
.footer__meta{
  display:flex;
  flex-direction:column;
  gap:5px;
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.7;
  color:var(--text-dim);
}
.footer__icp{color:var(--cyan-200);opacity:.8}

/* ---------- 7. 页面基础组件 ---------- */
.section{padding:clamp(38px,6.5vw,92px) 0}
.section--tight{padding:clamp(22px,3.6vw,46px) 0}
.section--deep{background:var(--abyss-800)}
.section--light{background:var(--paper-050);color:var(--ink-900)}
.section--light h1,.section--light h2,.section--light h3{color:var(--ink-900)}
.section--light .eyebrow{color:#0d8a7c}
.section--light .eyebrow::before{background:#0d8a7c}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--cyan-400);
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--cyan-400);
}

.page-head{padding:clamp(26px,4.6vw,58px) 0 clamp(14px,2.4vw,26px)}
.page-head__title{margin-bottom:.4em}
.page-head__lead{
  max-width:68ch;
  margin:0;
  font-size:clamp(15px,1.5vw,17px);
  line-height:1.85;
  color:var(--text-soft);
}
.section--light .page-head__lead{color:rgba(10,22,32,.76)}

.prose{max-width:68ch;color:rgba(230,242,246,.82)}
.prose p{margin:0 0 1.1em}
.prose h2,.prose h3{margin-top:1.4em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.4em;list-style:disc}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.section--light .prose{color:rgba(10,22,32,.8)}

.layout-split{
  display:grid;
  gap:clamp(20px,3vw,42px);
  grid-template-columns:1fr;
}

.panel{
  padding:clamp(18px,2.4vw,30px);
  background:linear-gradient(158deg,rgba(14,51,80,.9),rgba(7,31,51,.94));
  border:1px solid rgba(78,113,134,.34);
  border-radius:var(--radius-organic);
}
.panel--light{
  background:var(--paper-050);
  color:var(--ink-900);
  border-color:rgba(10,22,32,.12);
}
.panel--light .index-list__num{color:#0d8a7c}

/* 目录索引 */
.index-list{display:flex;flex-direction:column;gap:2px}
.index-list__item{border-bottom:1px solid rgba(78,113,134,.2)}
.index-list__link{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:baseline;
  gap:14px;
  padding:15px 14px;
  color:inherit;
  text-decoration:none;
  border-left:3px solid transparent;
  border-radius:0 14px 14px 0;
  transition:transform var(--dur-hover) ease,background-color var(--dur-hover) ease,
             border-color var(--dur-hover) ease;
}
.index-list__link:hover{
  transform:translateX(6px);
  background:var(--abyss-600);
  border-left-color:var(--cyan-400);
  color:inherit;
}
.index-list__num{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--cyan-400);
}
.index-list__title{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(17px,1.8vw,20px);
  letter-spacing:-.01em;
}
.index-list__meta{
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--text-dim);
  white-space:nowrap;
}

/* 轻量筛选标签 */
.tag-row{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  padding:6px 13px;
  background:transparent;
  border:1px solid rgba(78,113,134,.55);
  border-radius:var(--radius-chip);
  color:var(--text-soft);
  font-family:var(--font-body);
  font-size:13px;
  line-height:1.5;
  cursor:pointer;
  transition:color var(--dur-hover) ease,border-color var(--dur-hover) ease,
             background-color var(--dur-hover) ease;
}
.tag:hover{border-color:var(--cyan-400);color:var(--cyan-400)}
.tag[aria-pressed="true"]{
  background:var(--cyan-400);
  border-color:var(--cyan-400);
  color:var(--abyss-950);
  font-weight:700;
}
.section--light .tag{border-color:rgba(10,22,32,.22);color:rgba(10,22,32,.75)}
.section--light .tag:hover{border-color:#0d8a7c;color:#0d8a7c}
.section--light .tag[aria-pressed="true"]{background:#0d8a7c;border-color:#0d8a7c;color:var(--paper-050)}

/* 面包屑 */
.breadcrumb{padding:14px 0;border-bottom:var(--hairline)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.6;
  color:var(--text-dim);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  color:var(--line-400);
}
.breadcrumb__link{color:var(--cyan-200)}
.breadcrumb__link:hover{color:var(--cyan-400)}

/* 响应式图片容器 */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 9;
  background:var(--abyss-600);
  border:1px solid rgba(43,240,208,.16);
  border-radius:var(--radius-organic);
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:4 / 5}
.media-frame--slot{
  background-image:
    repeating-linear-gradient(115deg,rgba(43,240,208,.09) 0 1px,transparent 1px 26px),
    linear-gradient(150deg,#0E3350,#030F1A 78%);
}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame__caption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:14px 16px;
  font-family:var(--font-mono);
  font-size:12.5px;
  line-height:1.6;
  color:var(--mist-100);
  background:linear-gradient(180deg,transparent,rgba(3,15,26,.92));
}

/* 显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(6px);
  transition:opacity 240ms ease,transform 240ms ease;
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 8. 断点 ---------- */
@media (min-width:900px){
  .footer__top{grid-template-columns:minmax(240px,1fr) minmax(0,2fr)}
}
@media (min-width:960px){
  .layout-split{grid-template-columns:minmax(210px,3fr) 9fr}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .site-nav{display:none;width:100%}
  .site-nav[data-open]{
    display:block;
    max-height:min(62vh,420px);
    overflow-y:auto;
    border-top:var(--hairline);
    padding-top:8px;
  }
  .site-nav[data-open] .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    overflow:visible;
    padding-bottom:10px;
  }
  .site-nav[data-open] .site-nav__item{width:100%}
  .site-nav[data-open] .site-nav__link{display:block;width:100%;padding:12px 14px}
  .site-nav[data-open] .site-nav__link::after{left:14px;right:14px}
  .header-nav-bar{flex-wrap:wrap}
}
@media (max-width:720px){
  body{font-size:15px;line-height:1.8}
  .header-top__inner{padding-block:12px;gap:12px}
  .header-utility{margin-left:0;width:100%;justify-content:flex-start;gap:10px}
  .header-search{flex:1 1 130px}
  .header-search__input{width:100%}
  .line-status{flex-wrap:wrap;row-gap:8px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .line-status__list{gap:9px}
  .line-status__item{font-size:12px}
  .brand__tagline{display:none}
  .header-utility .btn--primary{flex:1 1 100%}
}

/* ---------- 9. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .site-nav__link:hover{transform:none}
  .footer__link:hover{transform:none}
  .index-list__link:hover{transform:none}
  .btn--primary:hover{transform:none}
}