/* ==========================================================================
   JZ赛事站 · 共享样式 /assets/site.css
   纵向叙事长卷 · 冰面控制室
   ========================================================================== */

/* 1. Reset ---------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
[id]{scroll-margin-top:104px}

/* 2. 变量 ---------------------------------------------------------------- */
:root{
  --ice:#2E8FB5;
  --deep:#12455C;
  --pale:#E8F2F6;
  --paper:#FBFCFD;
  --ink:#1C2329;
  --graphite:#39454F;
  --signal:#FF6A2B;
  --teal:#0F5A55;
  --indigo:#3B3A6B;
  --wine:#7A2E3F;
  --amber:#C97A16;

  --line:rgba(18,69,92,.14);
  --line-mid:rgba(18,69,92,.28);
  --on-dark:rgba(232,242,246,.74);
  --on-dark-weak:rgba(232,242,246,.46);

  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Cascadia Mono",Consolas,"Courier New",monospace;

  --shell:1280px;
  --gutter:24px;
  --notch:14px;
  --dur:160ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-1:0 1px 0 rgba(18,69,92,.06),0 10px 24px -18px rgba(18,69,92,.5);
  --shadow-2:0 2px 2px rgba(18,69,92,.07),0 22px 40px -26px rgba(18,69,92,.62);
}

/* 3. 基础排版 ------------------------------------------------------------ */
body{
  background:var(--paper);
  color:var(--graphite);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  color:var(--ink);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.02em;
}
h1{font-size:clamp(2rem,4.6vw,4rem)}
h2{font-size:clamp(1.5rem,2.6vw,2.2rem)}
h3{font-size:clamp(1.15rem,1.8vw,1.5rem)}
h4{font-size:1.05rem;letter-spacing:-.01em}
p{max-width:40em}
strong{color:var(--ink);font-weight:700}
.mono,.num,time,code{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.lead{font-size:clamp(1.05rem,1.5vw,1.2rem);color:var(--deep);font-weight:600;line-height:1.65;max-width:34em}
.prose{max-width:38em}
.prose>*+*{margin-top:1.05em}
.prose p{margin:0}
.prose h2,.prose h3{margin-top:1.8em;margin-bottom:.6em}
.prose ul{list-style:none;display:flex;flex-direction:column;gap:.5em}
.prose ul li{position:relative;padding-left:1.15em}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--ice)}
.prose a{color:var(--deep);text-decoration:underline;text-decoration-color:var(--ice);text-underline-offset:4px}

/* 4. 聚焦 / 动效基线 ----------------------------------------------------- */
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
a:focus-visible,button:focus-visible{box-shadow:inset 0 0 0 1px var(--ice)}
html[data-js="on"] [data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity 180ms var(--ease),transform 180ms var(--ease);
}
html[data-js="on"] [data-reveal].is-revealed{opacity:1;transform:none}
@keyframes breathe{
  0%,100%{transform:scale(1);opacity:1}
  50%{transform:scale(1.55);opacity:.45}
}

/* 5. 布局容器与栅格 ------------------------------------------------------ */
.container{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(44px,6.5vw,86px)}
.section--tight{padding-block:clamp(26px,3.5vw,44px)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(18px,2.2vw,28px)}
.c-4{grid-column:span 4}
.c-5{grid-column:span 5}
.c-6{grid-column:span 6}
.c-7{grid-column:span 7}
.c-8{grid-column:span 8}
.c-12{grid-column:span 12}

/* 6. 章节色带与章节头 ---------------------------------------------------- */
.band{
  display:block;width:100%;height:8px;background:var(--ice);
  clip-path:polygon(0 0,100% 0,calc(100% - 12px) 100%,0 100%);
}
.band--ice{background:var(--ice)}
.band--teal{background:var(--teal)}
.band--indigo{background:var(--indigo)}
.band--wine{background:var(--wine)}
.band--signal{background:var(--signal)}

.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:start;
  gap:clamp(14px,2vw,26px);
  padding-top:clamp(18px,2.4vw,30px);
  padding-bottom:clamp(10px,1.4vw,18px);
}
.section-num{
  font-family:var(--font-mono);
  font-size:clamp(2.6rem,6vw,4.4rem);
  font-weight:700;
  line-height:.86;
  letter-spacing:-.04em;
  color:var(--deep);
  font-variant-numeric:tabular-nums;
}
.section-title{font-size:clamp(1.5rem,2.6vw,2.2rem);color:var(--ink)}
.side-note{
  writing-mode:vertical-rl;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--graphite);
  align-self:stretch;
  justify-self:end;
}

/* 7. 切角面板 ------------------------------------------------------------ */
.panel{
  position:relative;
  background:var(--paper);
  padding:clamp(18px,2vw,26px);
  box-shadow:inset 0 0 0 1px var(--line),var(--shadow-1);
  clip-path:polygon(var(--notch) 0,100% 0,100% calc(100% - var(--notch)),calc(100% - var(--notch)) 100%,0 100%,0 var(--notch));
  transition:transform var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.panel--dark{
  background:var(--deep);
  color:var(--pale);
  box-shadow:inset 0 0 0 1px rgba(232,242,246,.16),var(--shadow-2);
}
.panel__head{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding-bottom:12px;margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.panel--dark .panel__head{border-bottom-color:rgba(232,242,246,.18)}
.panel--lift:hover,.panel--lift:focus-within{transform:translateY(-2px);box-shadow:inset 0 0 0 1px var(--line-mid),var(--shadow-2)}
.panel--dark.panel--lift:hover{box-shadow:inset 0 0 0 1px rgba(232,242,246,.3),var(--shadow-2)}

/* 8. 按钮 ---------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 18px;
  font-size:14.5px;font-weight:700;letter-spacing:.02em;
  color:var(--deep);background:var(--pale);
  box-shadow:inset 0 0 0 1px var(--line-mid);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:transform var(--dur) var(--ease),background var(--dur) var(--ease),color var(--dur) var(--ease),box-shadow var(--dur) var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--signal);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.3)}
.btn--primary:hover{background:#ff5a17}
.btn--ghost{background:transparent;color:var(--deep);box-shadow:inset 0 0 0 1px var(--line-mid)}
.btn--ghost:hover{background:var(--pale)}
.btn--sm{padding:7px 12px;font-size:12.5px}

/* 9. 标签 ---------------------------------------------------------------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 8px;
  font-family:var(--font-mono);
  font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  color:var(--deep);background:var(--pale);
  box-shadow:inset 0 0 0 1px var(--line);
}
.tag--live{color:#fff;background:var(--signal);box-shadow:none}
.tag--warn{color:#5a3705;background:rgba(201,122,22,.16);box-shadow:inset 0 0 0 1px rgba(201,122,22,.5)}
.tag--ver{background:transparent;color:var(--graphite);box-shadow:inset 0 0 0 1px var(--line-mid)}

/* 10. 数据表 ------------------------------------------------------------- */
.data-table{width:100%;font-size:15px}
.data-table caption{text-align:left;font-size:13px;color:var(--graphite);padding-bottom:10px}
.data-table th,.data-table td{
  padding:11px 12px;text-align:left;vertical-align:top;
  border-bottom:1px solid var(--line);
}
.data-table thead th{
  background:var(--deep);color:var(--pale);
  font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  border-bottom:0;
}
.data-table tbody tr:nth-child(even){background:var(--pale)}
.data-table tbody tr:hover{background:rgba(46,143,181,.1)}
.data-table .num,.data-table time{white-space:nowrap}

/* 11. 面包屑 ------------------------------------------------------------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:12.5px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--graphite);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item+.breadcrumb__item::before{content:"/";color:var(--ice)}
.breadcrumb a:hover{color:var(--deep);text-decoration:underline;text-underline-offset:4px}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:700}

/* 12. 图片容器 ----------------------------------------------------------- */
.media-frame{
  position:relative;overflow:hidden;
  background:var(--pale);
  box-shadow:inset 0 0 0 1px var(--line);
  clip-path:polygon(var(--notch) 0,100% 0,100% calc(100% - var(--notch)),calc(100% - var(--notch)) 100%,0 100%,0 var(--notch));
}
.media-frame__img{
  display:block;width:100%;height:auto;
  aspect-ratio:16/9;object-fit:cover;
  background:linear-gradient(135deg,var(--deep) 0%,var(--ice) 58%,var(--teal) 100%);
}
.media-frame--portrait .media-frame__img{aspect-ratio:4/5}
.media-frame--square .media-frame__img{aspect-ratio:1/1}
.media-frame__cap{
  padding-top:10px;
  font-family:var(--font-mono);
  font-size:12.5px;letter-spacing:.05em;color:var(--graphite);
}

/* 13. 侧边章节索引 ------------------------------------------------------- */
.toc{position:sticky;top:104px;align-self:start}
.toc__title{
  margin-bottom:12px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--graphite);
}
.toc__list{display:flex;flex-direction:column;gap:2px;border-left:1px solid var(--line-mid)}
.toc__link{
  display:block;padding:6px 0 6px 14px;margin-left:-1px;
  font-size:13.5px;color:var(--graphite);
  border-left:2px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.toc__link:hover{color:var(--deep)}
.toc__link.is-active{color:var(--ink);font-weight:700;border-left-color:var(--signal)}

/* 14. 头部命令栏 --------------------------------------------------------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  font-size:13.5px;font-weight:700;color:#fff;background:var(--signal);
  transform:translateY(-180%);
  transition:transform var(--dur) var(--ease);
}
.skip-link:focus{transform:translateY(0)}

.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);color:var(--pale);
  isolation:isolate;
}
.hdr-inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:18px;
  max-width:var(--shell);
  margin-inline:auto;
  padding:10px var(--gutter);
}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:0}
.brand__mark{
  position:relative;
  display:grid;place-items:center;
  width:38px;height:38px;flex:0 0 auto;
  font-family:var(--font-mono);font-size:15px;font-weight:700;letter-spacing:.02em;
  color:#fff;
  background:linear-gradient(135deg,var(--ice),var(--deep));
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.24);
  clip-path:polygon(9px 0,100% 0,100% calc(100% - 9px),calc(100% - 9px) 100%,0 100%,0 9px);
}
.brand__dot{
  position:absolute;top:3px;right:3px;
  width:7px;height:7px;border-radius:50%;
  background:var(--signal);
  animation:breathe 2.4s ease-in-out infinite;
}
.brand__text{display:flex;flex-direction:column;min-width:0}
.brand__name{font-size:15px;font-weight:800;letter-spacing:.02em;color:#fff;white-space:nowrap}
.brand__line{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--on-dark-weak);white-space:nowrap}

.cmd-nav{min-width:0}
.cmd-nav__list{
  display:flex;align-items:center;gap:2px;
  overflow-x:auto;scrollbar-width:thin;
}
.cmd-nav__link{
  position:relative;
  display:inline-block;
  padding:9px 12px;
  font-size:14px;font-weight:600;color:var(--on-dark);white-space:nowrap;
  transition:color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.cmd-nav__link:hover{color:#fff;background:rgba(46,143,181,.22)}
.cmd-nav__link[aria-current="page"]{color:#fff;background:rgba(46,143,181,.3)}
.cmd-nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;background:var(--signal);
}
.cmd-nav__link--alt{padding:10px 14px;box-shadow:inset 0 0 0 1px rgba(232,242,246,.28)}
.cmd-nav__aside{display:none}

.hdr-tools{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.live-state{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--on-dark);
  max-width:none;
}
.live-state__dot{
  width:7px;height:7px;border-radius:50%;background:var(--signal);
  animation:breathe 2.4s ease-in-out infinite;
}
.ver-switch{
  display:inline-flex;padding:2px;
  background:rgba(232,242,246,.08);
  box-shadow:inset 0 0 0 1px rgba(232,242,246,.14);
}
.ver-tab{
  padding:6px 11px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;color:var(--on-dark);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.ver-tab:hover{color:#fff}
.ver-tab[aria-pressed="true"]{color:var(--ink);background:var(--pale)}
html[data-version="upgrade"] .ver-tab[aria-pressed="true"]{color:#fff;background:var(--signal)}

.cmd-search{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 12px;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--pale);
  box-shadow:inset 0 0 0 1px rgba(232,242,246,.28);
  transition:background var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.cmd-search:hover{background:rgba(232,242,246,.12);transform:translateY(-2px)}
.cmd-search::before{content:"\2315";font-family:var(--font-mono);font-size:14px;color:var(--ice)}
.cmd-cta{padding:8px 14px;font-size:13px}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 12px;
  font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--pale);
  box-shadow:inset 0 0 0 1px rgba(232,242,246,.28);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle::before{
  content:"";width:14px;height:8px;
  background:
    linear-gradient(var(--ice),var(--ice)) 0 0/14px 2px no-repeat,
    linear-gradient(var(--ice),var(--ice)) 0 3px/14px 2px no-repeat,
    linear-gradient(var(--ice),var(--ice)) 0 6px/14px 2px no-repeat;
}
.nav-toggle[aria-expanded="true"]{color:#fff;background:var(--ice);box-shadow:inset 0 0 0 1px rgba(255,255,255,.34)}

.hdr-band{
  display:block;height:6px;
  background:linear-gradient(90deg,var(--ice) 0 34%,var(--teal) 34% 62%,var(--indigo) 62% 86%,var(--wine) 86% 100%);
}
.scroll-progress{
  position:absolute;left:0;bottom:0;width:100%;height:2px;
  background:var(--signal);
  transform:scaleX(0);transform-origin:0 50%;
}

/* 15. 页脚 --------------------------------------------------------------- */
.site-footer{background:var(--ink);color:var(--on-dark)}
.ft-band{
  display:block;height:8px;
  background:linear-gradient(90deg,var(--wine) 0 18%,var(--indigo) 18% 42%,var(--teal) 42% 66%,var(--ice) 66% 100%);
}
.ft-inner{
  display:grid;
  grid-template-columns:1.5fr repeat(4,minmax(0,1fr));
  gap:clamp(22px,3vw,36px);
  max-width:var(--shell);
  margin-inline:auto;
  padding:clamp(38px,5vw,56px) var(--gutter) clamp(26px,3vw,36px);
}
.ft-brand{display:flex;flex-direction:column;gap:16px;min-width:0}
.brand--ft .brand__mark{background:linear-gradient(135deg,var(--deep),var(--ice))}
.brand--ft .brand__line{color:var(--ice);letter-spacing:.12em}
.ft-note{max-width:22em;font-size:14px;line-height:1.8;color:var(--on-dark-weak)}
.ft-stamp{
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ice);
}
.ft-col{min-width:0}
.ft-col__title{
  margin-bottom:14px;padding-bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--ice);
  border-bottom:1px solid rgba(232,242,246,.14);
}
.ft-list{display:flex;flex-direction:column;gap:9px}
.ft-list a{
  font-size:14px;color:var(--on-dark);
  transition:color var(--dur) var(--ease);
}
.ft-list a:hover{color:#fff;text-decoration:underline;text-decoration-color:var(--ice);text-underline-offset:4px}
.ft-legal{
  display:grid;gap:10px;
  max-width:var(--shell);
  margin-inline:auto;
  padding:22px var(--gutter) clamp(28px,4vw,38px);
  border-top:1px solid rgba(232,242,246,.14);
  font-size:13px;
}
.ft-contact{max-width:none;font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--on-dark)}
.ft-service{max-width:46em;color:var(--on-dark-weak)}
.ft-icp{
  display:flex;flex-wrap:wrap;gap:8px 22px;
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.08em;color:var(--on-dark-weak);
  max-width:none;
}

/* 16. 响应式 ------------------------------------------------------------- */
@media (max-width:1080px){
  .hdr-inner{gap:12px}
  .cmd-nav__link{padding:8px 10px;font-size:13.5px}
  .live-state{display:none}
  .ft-inner{grid-template-columns:1.4fr 1fr 1fr 1fr}
}
@media (max-width:900px){
  :root{--gutter:18px}
  .hdr-inner{grid-template-columns:minmax(0,1fr) auto;gap:10px}
  .brand__line{display:none}
  .cmd-nav{display:none}
  html[data-js="on"] .cmd-nav{display:none}
  html[data-js="on"] .cmd-nav[data-open="true"]{
    display:block;
    position:absolute;left:0;right:0;top:100%;
    max-height:72vh;overflow:auto;
    padding:8px var(--gutter) 20px;
    background:var(--ink);
    border-top:1px solid rgba(232,242,246,.12);
    box-shadow:0 30px 44px -24px rgba(0,0,0,.78);
  }
  html[data-js="on"] .cmd-nav[data-open="true"] .cmd-nav__list{display:block;overflow:visible}
  html[data-js="on"] .cmd-nav[data-open="true"] .cmd-nav__link{
    display:block;padding:14px 4px;font-size:15px;
    border-bottom:1px solid rgba(232,242,246,.1);
  }
  html[data-js="on"] .cmd-nav[data-open="true"] .cmd-nav__link[aria-current="page"]::after{
    left:0;right:auto;width:20px;bottom:8px;
  }
  .cmd-nav__aside{display:flex;flex-direction:column;gap:10px;margin-top:16px}
  .cmd-nav__link--alt{border-bottom:0;text-align:center}
  .nav-toggle{display:inline-flex}
  .cmd-search,.cmd-cta{display:none}
  html:not([data-js="on"]) .nav-toggle{display:none}
  html:not([data-js="on"]) .cmd-nav{display:flex;grid-column:1/-1;overflow-x:auto}
  .c-4,.c-5,.c-6,.c-7,.c-8{grid-column:span 12}
  .toc{position:static;margin-bottom:18px}
  .ft-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  :root{--gutter:16px;--notch:12px}
  body{font-size:16px}
  .section-head{grid-template-columns:auto minmax(0,1fr);gap:14px}
  .side-note{display:none}
  .hdr-tools{gap:8px}
  .ver-tab{padding:6px 9px;font-size:12px}
  .ft-inner{grid-template-columns:1fr;gap:26px}
  .data-table{font-size:14px}
  .data-table th,.data-table td{padding:9px 10px}
}

/* 17. Reduced motion ----------------------------------------------------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .live-state__dot,.brand__dot{animation:none}
  .panel--lift:hover,.panel--lift:focus-within,
  .btn:hover,.cmd-search:hover{transform:none}
  html[data-js="on"] [data-reveal]{opacity:1;transform:none}
}