/* =========================================================
   KAIYUN 赛事内容速览 / 共享外壳样式
   文件位置：/assets/site.css
   色彩体系：深墨绿底 + 荧光青绿数据 + 暖橙冲突 + 电光蓝进程
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#0A1F1A;
  --ink-2:#12161A;
  --panel:#16241F;
  --signal:#35F0B0;
  --warm:#FF7A3D;
  --blue:#4CC9F0;
  --line:#26433A;
  --white:#F1F7F4;
  --muted:#9DB2A9;
  --alert:#FF5A5F;

  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Noto Sans SC","Source Han 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:1220px;
  --gutter:clamp(16px,4vw,48px);
  --header-h:64px;

  --shadow-hard:5px 5px 0 rgba(0,0,0,.55);
  --shadow-lift:8px 8px 0 rgba(0,0,0,.62);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,fieldset{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
::selection{background:var(--signal);color:#04170F}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(1200px 620px at 88% -12%, rgba(53,240,176,.09), transparent 62%),
    radial-gradient(900px 520px at -12% 28%, rgba(76,201,240,.07), transparent 66%),
    radial-gradient(760px 480px at 60% 108%, rgba(255,122,61,.05), transparent 70%);
  color:var(--white);
  font-family:var(--font-body);
  font-size:15px;
  font-weight:400;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--white);
}
h1{font-size:clamp(30px,5vw,44px)}
h2{font-size:clamp(24px,3.6vw,40px)}
h3{font-size:20px;letter-spacing:-.01em}
p{max-width:74ch}
strong{font-weight:700;color:var(--white)}
code,kbd,samp{font-family:var(--font-mono);font-size:.9em;color:var(--signal)}

/* ---------- 4. 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--shell-max);
  margin:0 auto;
  padding:0 var(--gutter);
}
.wrap--narrow{max-width:820px}

.section{
  padding:clamp(40px,7vw,86px) 0;
  position:relative;
}
.section--band{
  background:var(--ink-2);
  border-top:2px solid var(--line);
  border-bottom:2px solid var(--line);
}
.section--tight{padding:clamp(24px,4vw,48px) 0}
.section-head{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:16px;
  align-items:baseline;
  margin-bottom:clamp(20px,3vw,34px);
}
.section-num{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--signal);
  white-space:nowrap;
}
.section-title{font-size:clamp(24px,3.6vw,40px)}
.section-sub{
  grid-column:1 / -1;
  color:var(--muted);
  font-size:15px;
  max-width:68ch;
}

/* ---------- 5. 轴标区 ---------- */
.axis-band{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  padding:10px 0;
  border-top:2px solid var(--line);
  border-bottom:1px solid var(--line);
  font-size:12px;
  letter-spacing:.18em;
  color:var(--muted);
}
.axis-band--perf{color:var(--blue)}
.axis-band--process{color:var(--signal)}
.axis-dot{
  width:8px;height:8px;
  background:currentColor;
  flex:0 0 auto;
}
.axis-band .axis-label{margin-right:auto}

/* ---------- 6. 头部：框架式导航 ---------- */
.skip-link{
  position:fixed;
  left:14px;
  top:-80px;
  z-index:99;
  padding:10px 16px;
  background:var(--signal);
  color:#04170F;
  font-size:14px;
  font-weight:700;
  border:2px solid #04170F;
  transition:top .18s ease;
}
.skip-link:focus{top:14px}

.frame-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--ink-2);
  border-bottom:2px solid var(--line);
  color:var(--white);
}
.frame-inner{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:0 var(--gutter);
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:stretch;
  min-height:var(--header-h);
}
.frame-progress{
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:2px;
  background:rgba(38,67,58,.75);
  overflow:hidden;
}
.frame-progress-bar{
  display:block;
  height:100%;
  width:0;
  background:var(--signal);
  transition:width .12s linear;
}

/* 品牌 */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
  padding:12px 18px 12px 0;
  border-right:1px solid var(--line);
  color:var(--white);
}
.brand-mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:34px;height:34px;
  border:2px solid var(--signal);
  color:var(--signal);
  font-family:var(--font-mono);
  font-size:13px;
  letter-spacing:.02em;
  box-shadow:3px 3px 0 rgba(53,240,176,.2);
}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{font-size:15px;font-weight:900;letter-spacing:.06em;line-height:1.15}
.brand-line{
  font-size:11px;
  letter-spacing:.14em;
  color:var(--muted);
  white-space:nowrap;
}
.brand:hover .brand-mark{border-color:var(--white)}
.brand:hover .brand-name{color:var(--signal)}

/* 导航 */
.nav-rail{
  display:flex;
  justify-content:center;
  align-items:stretch;
  min-width:0;
}
.nav-list{display:flex;align-items:stretch}
.nav-link{
  position:relative;
  display:flex;
  align-items:center;
  min-height:var(--header-h);
  padding:0 14px;
  font-size:14px;
  letter-spacing:.04em;
  color:var(--muted);
  white-space:nowrap;
  transition:color .18s ease;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;
  bottom:12px;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s ease;
}
.nav-link:hover,
.nav-link:focus-visible{color:var(--white)}
.nav-link:hover::after,
.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--white);font-weight:700}
.nav-link[aria-current="page"]::after{
  transform:scaleX(1);
  background:var(--signal);
}

/* 头部右侧状态 */
.frame-meta{
  display:flex;
  align-items:center;
  gap:8px;
  padding-left:18px;
  border-left:1px solid var(--line);
}
.meta-chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 8px;
  border:1px solid var(--line);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}
.meta-chip--alt{border-color:rgba(76,201,240,.4);color:var(--blue)}
.meta-num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  color:var(--signal);
  font-size:12px;
}
.meta-chip--alt .meta-num{color:var(--blue)}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  align-self:center;
  padding:9px 12px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--white);
  font-size:12px;
  letter-spacing:.14em;
  cursor:pointer;
  transition:border-color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--signal)}
.nav-toggle-bar{display:block;width:16px;height:2px;background:var(--signal)}
.nav-toggle-bar:nth-child(2){width:10px}
.nav-toggle-label{font-family:var(--font-mono);font-size:11px}
.frame-header[data-open="true"] .nav-toggle{border-color:var(--signal)}

/* ---------- 7. 通用按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 20px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--white);
  font-size:14px;
  font-weight:700;
  letter-spacing:.05em;
  cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-hard)}
.btn--signal{
  background:var(--signal);
  border-color:var(--signal);
  color:#04170F;
}
.btn--signal:hover{background:#5CF6C1}
.btn--ghost{
  background:transparent;
  color:var(--muted);
}
.btn--ghost:hover{color:var(--white);border-color:var(--signal);box-shadow:var(--shadow-hard)}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- 8. 面包屑 ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin:22px 0 0;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.crumb a{color:var(--muted);border-bottom:1px solid transparent}
.crumb a:hover{color:var(--signal);border-bottom-color:var(--signal)}
.crumb-sep{color:var(--line)}

/* ---------- 9. 网格 ---------- */
.grid{display:grid;gap:clamp(16px,2.4vw,24px)}
.grid-split{
  display:grid;
  gap:clamp(24px,4vw,48px);
  grid-template-columns:minmax(0,1fr);
}
.grid-duo{display:grid;gap:clamp(16px,2.4vw,24px);grid-template-columns:minmax(0,1fr)}
.grid-trio{display:grid;gap:clamp(16px,2.4vw,24px);grid-template-columns:minmax(0,1fr)}
.grid-split > *,.grid-duo > *,.grid-trio > *{min-width:0}

/* ---------- 10. 数据卡片 ---------- */
.data-card{
  background:var(--panel);
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  padding:clamp(16px,2.4vw,22px);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.data-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
.data-card--signal{border-color:rgba(53,240,176,.55)}
.data-card--warm{border-color:rgba(255,122,61,.6)}
.data-card--blue{border-color:rgba(76,201,240,.55)}
.data-card .data-foot{
  margin-top:14px;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.stat-num{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-weight:700;
  font-size:clamp(26px,4.4vw,42px);
  line-height:1;
  letter-spacing:-.03em;
  color:var(--signal);
}
.stat-num--warm{color:var(--warm)}
.stat-num--blue{color:var(--blue)}
.stat-num--white{color:var(--white)}
.stat-label{
  display:block;
  margin-top:8px;
  font-size:12px;
  letter-spacing:.16em;
  color:var(--muted);
}

/* ---------- 11. 标签 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 8px;
  border:1px solid var(--line);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--muted);
  white-space:nowrap;
}
.tag--perf{color:var(--blue);border-color:rgba(76,201,240,.42)}
.tag--process{color:var(--signal);border-color:rgba(53,240,176,.42)}
.tag--alert{color:var(--warm);border-color:rgba(255,122,61,.45)}

/* ---------- 12. 时间轴 ---------- */
.timeline{
  position:relative;
  padding-left:26px;
  border-left:2px solid var(--line);
}
.timeline-item{
  position:relative;
  padding:0 0 clamp(20px,3vw,30px);
}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
  content:"";
  position:absolute;
  left:-35px;
  top:6px;
  width:12px;height:12px;
  background:var(--ink);
  border:2px solid var(--line);
  transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.timeline-item.is-active::before,
.timeline-item:focus-within::before{
  background:var(--signal);
  border-color:var(--signal);
  box-shadow:0 0 0 4px rgba(53,240,176,.14);
}
.timeline-time{
  display:block;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12px;
  letter-spacing:.1em;
  color:var(--blue);
}

/* ---------- 13. 折叠面板 ---------- */
.panel{
  border:2px solid var(--line);
  background:var(--panel);
}
.panel + .panel{margin-top:12px}
.panel > summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:14px 18px;
  cursor:pointer;
  font-weight:700;
  color:var(--white);
  list-style:none;
}
.panel > summary::-webkit-details-marker{display:none}
.panel > summary::after{
  content:"＋";
  font-family:var(--font-mono);
  color:var(--signal);
  flex:0 0 auto;
}
.panel[open] > summary::after{content:"－"}
.panel[open] > summary{border-bottom:1px solid var(--line)}
.panel-body{
  padding:14px 18px 18px;
  color:var(--muted);
  font-size:15px;
  line-height:1.75;
  transition:opacity .2s ease;
}
.panel-body p + p{margin-top:10px}

/* ---------- 14. 图片容器基础规则 ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  width:100%;
  border:2px solid var(--line);
  box-shadow:var(--shadow-hard);
  background-color:var(--panel);
  background-image:
    repeating-linear-gradient(0deg, rgba(38,67,58,.6) 0 1px, transparent 1px 30px),
    repeating-linear-gradient(90deg, rgba(38,67,58,.45) 0 1px, transparent 1px 30px),
    radial-gradient(120% 90% at 18% 0%, rgba(53,240,176,.12), transparent 62%);
  background-position:center;
}
.media img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}
.media--wide{aspect-ratio:16 / 9}
.media--tall{aspect-ratio:3 / 4}
.media--square{aspect-ratio:1 / 1}
.media-caption{
  margin-top:10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
  line-height:1.6;
}

/* ---------- 15. 纵排注释 ---------- */
.note-rot{
  display:inline-block;
  writing-mode:vertical-rl;
  font-size:12px;
  letter-spacing:.28em;
  color:var(--muted);
  line-height:1;
}
.note-rot--signal{color:var(--signal)}
.note-rot--blue{color:var(--blue)}

/* ---------- 16. 显现（滚动进入） ---------- */
.js-on [data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .35s ease,transform .35s ease;
}
.js-on [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 17. 回到顶部 ---------- */
.to-top{
  position:fixed;
  right:16px;
  bottom:16px;
  z-index:70;
  display:none;
  padding:10px 14px;
  border:2px solid var(--line);
  background:var(--panel);
  color:var(--signal);
  font-size:12px;
  letter-spacing:.14em;
  box-shadow:var(--shadow-hard);
  cursor:pointer;
}
.to-top[data-visible="true"]{display:inline-flex}
.to-top:hover{transform:translateY(-2px);border-color:var(--signal)}

/* ---------- 18. 页脚 ---------- */
.site-foot{
  margin-top:clamp(48px,8vw,96px);
  background:var(--ink-2);
  border-top:2px solid var(--line);
  color:var(--muted);
}
.foot-wrap{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:clamp(36px,6vw,64px) var(--gutter) clamp(24px,4vw,36px);
  display:grid;
  gap:clamp(24px,3vw,34px);
  grid-template-columns:minmax(0,1fr);
}
.foot-brand{min-width:0}
.brand--foot{
  border-right:0;
  padding:0;
  background:none;
}
.brand--foot .brand-name{font-size:18px;letter-spacing:.08em}
.brand--foot .brand-line{white-space:normal}
.foot-note{
  margin-top:14px;
  max-width:34ch;
  font-size:13px;
  line-height:1.75;
  color:var(--muted);
}
.foot-col{min-width:0}
.foot-title{
  margin-bottom:14px;
  font-size:12px;
  font-weight:700;
  letter-spacing:.2em;
  color:var(--white);
}
.foot-title::before{
  content:"";
  display:block;
  width:22px;
  height:2px;
  margin-bottom:10px;
  background:var(--signal);
}
.foot-list li + li{margin-top:9px}
.foot-list a{
  font-size:14px;
  color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.foot-list a:hover,
.foot-list a:focus-visible{color:var(--signal);border-bottom-color:var(--signal)}
.foot-contact{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:20px var(--gutter);
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  gap:6px 20px;
  font-size:13px;
  line-height:1.8;
  color:var(--muted);
}
.foot-line{position:relative}
.foot-legal{
  max-width:var(--shell-max);
  margin:0 auto;
  padding:14px var(--gutter) 34px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  font-size:12px;
  letter-spacing:.06em;
  color:var(--muted);
}

/* ---------- 19. 小工具类 ---------- */
.text-muted{color:var(--muted)}
.text-signal{color:var(--signal)}
.text-warm{color:var(--warm)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.stack-sm > * + *{margin-top:10px}
.stack-md > * + *{margin-top:18px}
.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;
}

/* ---------- 20. 响应式 ---------- */
@media (min-width:640px){
  .grid-duo{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:760px){
  .foot-wrap{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:900px){
  .grid-trio{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (min-width:1000px){
  .grid-split{grid-template-columns:minmax(0,7fr) minmax(0,3fr)}
}
@media (min-width:1040px){
  .foot-wrap{grid-template-columns:1.6fr repeat(4,minmax(0,1fr))}
}

/* 平板与移动：折叠导航 */
@media (max-width:899px){
  .frame-inner{
    grid-template-columns:minmax(0,1fr) auto;
    min-height:60px;
  }
  .brand{padding-right:0;border-right:0}
  .nav-toggle{display:inline-flex}
  .nav-rail{
    position:absolute;
    left:0;right:0;
    top:100%;
    display:block;
    background:var(--ink-2);
    border-top:2px solid var(--line);
    border-bottom:2px solid var(--line);
    max-height:0;
    visibility:hidden;
    overflow:hidden;
    transition:max-height .24s ease,visibility .24s ease;
  }
  .frame-header[data-open="true"] .nav-rail{
    max-height:min(72vh,520px);
    visibility:visible;
    overflow-y:auto;
  }
  .nav-list{flex-direction:column}
  .nav-link{
    min-height:52px;
    padding:0 var(--gutter);
    font-size:15px;
    border-bottom:1px solid rgba(38,67,58,.6);
  }
  .nav-link::after{
    left:var(--gutter);
    right:auto;
    width:26px;
    bottom:16px;
  }
  .nav-link:hover::after,
  .nav-link:focus-visible::after,
  .nav-link[aria-current="page"]::after{transform:scaleX(1)}
  .nav-link[aria-current="page"]{background:rgba(53,240,176,.06)}
}
@media (max-width:639px){
  .frame-meta{display:none}
  body{font-size:15px}
  .foot-legal{justify-content:flex-start}
}
@media (min-width:900px) and (max-width:1150px){
  .frame-meta{display:none}
}
@media (min-width:900px) and (max-width:1100px){
  .nav-link{padding:0 10px;font-size:13px}
  .nav-link::after{left:10px;right:10px}
}

/* ---------- 21. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .js-on [data-reveal]{opacity:1;transform:none}
  .data-card:hover,
  .btn:hover,
  .to-top:hover{transform:none}
}