/* =========================================================
   云开赛场版 · /assets/site.css
   共享外壳：reset / 设计变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================= */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0}
h1,h2,h3,h4,h5,h6,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}

/* ---------- 2. 设计变量 ---------- */
:root{
  --ink:#0B1B2B;
  --ink-deep:#06121C;
  --paper:#F3EFE4;
  --cyan:#2EE6D6;
  --orange:#FF6B35;
  --green:#6BBF59;
  --grid-color:#44586B;
  --muted:#9FB2C4;
  --paper-shadow:#CFC7B6;
  --cyan-press:#0E5F5A;

  --line:rgba(68,88,107,.55);
  --line-strong:rgba(68,88,107,.95);
  --cyan-soft:rgba(46,230,214,.10);
  --orange-soft:rgba(255,107,53,.14);

  --font-display:"Inter Tight","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-body:Inter,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Noto Sans Mono CJK SC",monospace;

  --maxw:1440px;
  --gutter:clamp(20px,5vw,72px);
  --step:8px;
  --dur:180ms;
  --ease:cubic-bezier(.2,0,0,1);
  --header-h:72px;
}

/* ---------- 3. 基础排版 ---------- */
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{font-weight:300;line-height:1.08;letter-spacing:-.01em}
h1{font-size:clamp(30px,3.6vw,56px)}
h2{font-size:clamp(24px,2.3vw,38px)}
h3{font-size:clamp(18px,1.4vw,24px)}
h4{font-size:16px;font-weight:500;line-height:1.4}
p{max-width:68ch}
a{color:inherit;text-decoration:none}
::selection{background:var(--cyan);color:var(--ink-deep)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
.section--paper :focus-visible,
.panel--paper :focus-visible{outline-color:var(--ink)}

/* ---------- 4. 跳过导航 ---------- */
.skip-link{
  position:absolute;
  top:-64px;
  left:20px;
  z-index:200;
  padding:10px 16px;
  background:var(--cyan);
  color:var(--ink-deep);
  font-size:13px;
  letter-spacing:.06em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{top:12px}

/* ---------- 5. 头部 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,27,43,.96);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
}
.site-header__inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto auto;
  grid-template-areas:"brand status nav actions";
  align-items:center;
  gap:28px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 var(--gutter);
  min-height:var(--header-h);
}
.site-header__inner > *{min-width:0}

/* 品牌区 */
.brand{grid-area:brand}
.brand__link{display:flex;align-items:center;gap:12px;padding:4px 0}
.brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  flex:none;width:38px;height:38px;
  border:1px solid var(--cyan);
  color:var(--cyan);
  font-family:var(--font-mono);font-size:16px;line-height:1;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.brand__link:hover .brand__mark{background:var(--cyan);color:var(--ink-deep)}
.brand__text{display:flex;flex-direction:column;gap:3px;min-width:0}
.brand__name{font-size:17px;font-weight:500;letter-spacing:.06em;line-height:1.1;white-space:nowrap}
.brand__tagline{font-size:11px;letter-spacing:.18em;line-height:1.1;color:var(--muted);white-space:nowrap}
.brand__badge{
  flex:none;
  padding:4px 7px;
  border:1px solid rgba(255,107,53,.5);
  color:var(--orange);
  font-family:var(--font-mono);font-size:11px;line-height:1;letter-spacing:.06em;
}

/* 数据状态带 */
.status-strip{
  grid-area:status;
  justify-self:center;
  display:flex;align-items:center;gap:22px;
  min-width:0;overflow:hidden;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;
  color:var(--muted);
}
.status-strip__item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.status-strip__item::before{content:"";width:5px;height:5px;background:var(--cyan);flex:none}
.status-strip__item:nth-child(2)::before{background:var(--green)}
.status-strip__item:nth-child(3)::before{background:var(--orange)}

/* 导航 */
.site-nav{grid-area:nav}
.site-nav__list{display:flex;align-items:center;gap:22px}
.site-nav__link{
  position:relative;
  display:inline-block;
  padding:8px 0;
  font-size:13px;letter-spacing:.04em;
  color:var(--paper);opacity:.75;
  transition:opacity var(--dur) var(--ease),color var(--dur) var(--ease);
}
.site-nav__link:hover{opacity:1;color:var(--cyan)}
.site-nav__link[aria-current="page"]{opacity:1;color:var(--paper)}
.site-nav__link[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;background:var(--cyan);
}

/* 头部按钮区 */
.header-actions{grid-area:actions;justify-self:end;display:flex;align-items:center;gap:10px}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  position:relative;
  width:44px;height:44px;
  border:1px solid var(--line-strong);
  cursor:pointer;
  transition:border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan)}
.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  position:absolute;left:50%;top:50%;
  width:18px;height:1px;background:var(--paper);
  transform:translate(-50%,-50%);
}
.nav-toggle__bars::before{content:"";top:-6px}
.nav-toggle__bars::after{content:"";top:6px}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);background:var(--cyan-soft)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:var(--cyan)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{top:-5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{top:5px}

/* 阅读进度 */
.scroll-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:transparent}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  background:var(--cyan);
  transform:scaleX(0);transform-origin:0 50%;
}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;
  border:1px solid transparent;
  font-family:var(--font-body);
  font-size:13px;font-weight:500;letter-spacing:.08em;
  line-height:1.2;white-space:nowrap;cursor:pointer;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--cyan);border-color:var(--cyan);color:var(--ink-deep)}
.btn--primary:hover{background:var(--cyan-press);border-color:var(--cyan-press);color:var(--paper)}
.btn--primary:active{background:var(--cyan-press);border-color:var(--cyan);color:var(--paper)}
.btn--ghost{background:transparent;border-color:var(--line-strong);color:var(--paper)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--ghost:active{border-color:var(--cyan);background:var(--cyan-soft)}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  color:var(--muted);
  border-top:1px solid var(--line-strong);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:var(--gutter);
  width:96px;height:3px;background:var(--cyan);
}
.site-footer__inner{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,2fr);
  gap:56px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:72px var(--gutter) 48px;
}
.footer-brand__mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;
  border:1px solid var(--cyan);color:var(--cyan);
  font-family:var(--font-mono);font-size:16px;line-height:1;
}
.footer-brand__name{margin:16px 0 6px;font-size:20px;font-weight:400;letter-spacing:.06em;color:var(--paper)}
.footer-brand__meta{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--orange)}
.footer-brand__note{margin:0;max-width:34ch;font-size:13px;line-height:1.7;color:var(--muted)}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.footer-col__title{
  margin:0 0 18px;
  font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  color:var(--paper);
}
.footer-col__list{display:grid;gap:10px}
.footer-col__link{
  display:inline-block;
  font-size:14px;color:var(--muted);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-col__link:hover{color:var(--cyan);border-bottom-color:var(--cyan)}
.site-footer__contact{
  max-width:var(--maxw);
  margin:0 auto;
  padding:28px var(--gutter) 28px;
  border-top:1px solid var(--line);
}
.footer-contact{
  max-width:none;
  margin:0 0 8px;
  font-family:var(--font-mono);font-size:12.5px;line-height:1.7;
  color:var(--paper);word-break:break-word;
}
.footer-contact__note{margin:0;max-width:62ch;font-size:12px;line-height:1.7;color:var(--muted)}
.site-footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  max-width:var(--maxw);
  margin:0 auto;
  padding:20px var(--gutter) 40px;
  border-top:1px solid var(--line);
}
.footer-bottom__copy,.footer-bottom__icp{
  margin:0;max-width:none;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--muted);
}
.footer-bottom__year{color:var(--cyan)}

/* ---------- 8. 布局容器与网格 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:920px}
.section{padding:clamp(56px,8vw,112px) 0}
.section--tight{padding:clamp(32px,4vw,56px) 0}
.section--deep{background:var(--ink-deep)}
.section--paper{background:var(--paper);color:var(--ink)}
.section--paper h1,.section--paper h2,.section--paper h3{color:var(--ink)}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px}
.rule{height:1px;border:0;background:var(--line);margin:0}

/* ---------- 9. 通用组件 ---------- */
.eyebrow{
  display:inline-block;
  margin:0 0 12px;
  font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;
  color:var(--cyan);
}
.section--paper .eyebrow{color:var(--cyan-press)}
.meta-mono{
  margin:0;max-width:none;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;
  color:var(--muted);
}
.display-num{
  margin:0;
  font-family:var(--font-display);
  font-weight:700;
  font-variant-numeric:tabular-nums;
  letter-spacing:-.02em;
  line-height:.9;
}
.panel--paper{
  background:var(--paper);
  color:var(--ink);
  padding:clamp(20px,2.4vw,36px);
  box-shadow:12px 12px 0 var(--paper-shadow);
}
.panel--paper .meta-mono{color:#5B6C7B}
.panel--outline{border:1px solid var(--line-strong);padding:clamp(18px,2vw,28px)}
.chip-group{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--muted);
  font-size:12px;letter-spacing:.08em;line-height:1.2;
  cursor:pointer;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease),background var(--dur) var(--ease);
}
.chip:hover{color:var(--paper);border-color:var(--paper)}
.chip:active{background:var(--cyan-soft)}
.chip[aria-pressed="true"],
.chip.is-active{border-color:var(--cyan);color:var(--cyan);background:var(--cyan-soft)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  border:1px solid currentColor;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;line-height:1.2;
  color:var(--muted);
}
.tag--update{color:var(--orange);background:var(--orange-soft)}
.tag--live{color:var(--green)}
.tag--info{color:var(--cyan)}
.link-underline{
  color:var(--cyan);
  border-bottom:1px solid rgba(46,230,214,.5);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.link-underline:hover{border-bottom-color:var(--cyan);color:var(--paper)}
.breadcrumb{margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.breadcrumb__item{display:flex;align-items:center;gap:10px}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--grid-color)}
.breadcrumb__link{
  color:var(--muted);
  transition:color var(--dur) var(--ease);
}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__current{color:var(--paper)}

/* 图片容器基础规则（供页面阶段放置图片） */
.img-frame{
  position:relative;
  display:block;
  width:100%;
  overflow:hidden;
  background-color:var(--ink-deep);
  background-image:
    repeating-linear-gradient(0deg,rgba(68,88,107,.35) 0 1px,transparent 1px 40px),
    repeating-linear-gradient(90deg,rgba(68,88,107,.35) 0 1px,transparent 1px 40px);
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame--wide{aspect-ratio:16/9}
.img-frame--panorama{aspect-ratio:21/9}
.img-frame--square{aspect-ratio:1/1}
.img-frame--tall{aspect-ratio:4/5}
.img-frame--hero{aspect-ratio:3/2}
.img-frame::after{content:"";position:absolute;inset:0;border:1px solid var(--line);pointer-events:none}
.img-frame__caption{
  position:absolute;left:0;bottom:0;z-index:2;
  max-width:100%;
  padding:8px 12px;
  background:var(--ink-deep);
  color:var(--paper);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;line-height:1.4;
}

/* 长文阅读区 */
.prose{max-width:68ch}
.prose h2{margin:40px 0 14px;font-size:22px;font-weight:400;letter-spacing:-.01em}
.prose h3{margin:28px 0 10px;font-size:17px;font-weight:500}
.prose p{margin:0 0 16px}
.prose ul{margin:0 0 18px;display:grid;gap:8px}
.prose ul li{position:relative;padding-left:20px}
.prose ul li::before{content:"";position:absolute;left:0;top:.75em;width:9px;height:1px;background:var(--cyan)}
.section--paper .prose ul li::before{background:var(--cyan-press)}

/* 滚动显现 */
[data-reveal]{transition:opacity 260ms var(--ease),transform 260ms var(--ease)}
[data-reveal].is-armed{opacity:0;transform:translateY(8px)}
[data-reveal].is-armed.is-visible{opacity:1;transform:none}

/* ---------- 10. 响应式 ---------- */
@media (max-width:1439px){
  .header-actions > .btn--ghost{display:none}
}
@media (max-width:1199px){
  .status-strip{display:none}
  .site-header__inner{gap:20px}
  .site-nav__list{gap:18px}
}
@media (max-width:1023px){
  :root{--header-h:60px}
  .site-header__inner{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:
      "brand actions"
      "status status";
    gap:0 16px;
    padding:0 var(--gutter);
    align-items:center;
  }
  .brand{grid-area:brand;align-self:center}
  .header-actions{grid-area:actions}
  .nav-toggle{display:block}
  .status-strip{
    display:flex;
    grid-column:1 / -1;
    grid-area:status;
    justify-content:flex-start;
    gap:18px;
    margin:6px 0 0;
    padding:9px 0;
    border-top:1px solid var(--line);
    overflow-x:auto;
    scrollbar-width:none;
  }
  .status-strip::-webkit-scrollbar{display:none}
  .site-nav{
    position:absolute;
    top:100%;left:0;right:0;
    z-index:70;
    display:block;
    padding:10px var(--gutter) 20px;
    background:var(--ink-deep);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line-strong);
    max-height:calc(100vh - var(--header-h) - 40px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-6px);
    pointer-events:none;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility 0s linear var(--dur);
  }
  .site-nav[data-open="true"]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
    transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease),visibility 0s linear 0s;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__item{border-bottom:1px solid var(--line)}
  .site-nav__link{display:block;padding:15px 0;font-size:16px;letter-spacing:.06em;opacity:.9}
  .site-nav__link[aria-current="page"]{color:var(--cyan);opacity:1}
  .site-nav__link[aria-current="page"]::after{left:auto;right:0;width:22px;bottom:14px}
  body[data-nav-locked="true"]{overflow:hidden}
  .site-footer__inner{grid-template-columns:1fr;gap:40px;padding:56px var(--gutter) 36px}
  .site-footer::before{width:64px}
}
@media (max-width:900px){
  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr));gap:16px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
}
@media (max-width:599px){
  .brand__tagline{display:none}
  .brand__mark{width:34px;height:34px;font-size:14px}
  .brand__badge{font-size:10px;padding:3px 5px}
  .btn{padding:10px 13px;font-size:12px;letter-spacing:.06em}
  .grid-12{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .panel--paper{box-shadow:8px 8px 0 var(--paper-shadow)}
  .site-footer__bottom{padding-bottom:32px}
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:1ms !important;
    animation-iteration-count:1 !important;
    transition-duration:1ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal].is-armed{opacity:1;transform:none}
  .scroll-progress__bar{transition:none !important}
}