/* =========================================================
   安博赛事 / ANBO BOARD — 全站共享样式 /assets/site.css
   ========================================================= */

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

/* ---------- 2. 变量 ---------- */
:root{
  --c-carbon:#0B0F0E;
  --c-ink:#0E2B24;
  --c-ink-mid:#14453A;
  --c-cyan:#28F0C8;
  --c-cyan-deep:#0C5C4A;
  --c-orange:#FF8A3D;
  --c-mist:#E8F1ED;
  --c-body:#C7D6D0;
  --c-neutral:#8FA7A0;
  --c-paper:#F7FAF8;
  --c-charcoal-text:#101413;
  --c-alert:#FF6B4A;
  --glass:rgba(40,240,200,.10);
  --glass-line:rgba(40,240,200,.24);
  --line:rgba(232,241,237,.14);
  --line-soft:rgba(232,241,237,.08);
  --font-body:"Noto Sans SC","PingFang SC",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,monospace;
  --container:1240px;
  --rail-w:0px;
  --radius:2px;
  --t-fast:160ms;
  --t-base:220ms;
}

/* ---------- 3. 基础与中文排版 ---------- */
body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--c-carbon);
  background-image:
    radial-gradient(880px 520px at 90% -8%, rgba(40,240,200,.10), transparent 66%),
    radial-gradient(720px 460px at 2% 18%, rgba(20,69,58,.55), transparent 72%);
  background-repeat:no-repeat;
  color:var(--c-mist);
  font-family:var(--font-body);
  font-size:clamp(16px,1.05vw,17px);
  line-height:1.7;
  letter-spacing:.01em;
  overflow-x:hidden;
}
h1,h2,h3,h4{font-weight:800;line-height:1.18;letter-spacing:-.02em}
h1{font-size:clamp(32px,5.6vw,64px)}
h2{font-size:clamp(24px,3.2vw,38px)}
h3{font-size:clamp(18px,1.9vw,23px)}
p{max-width:64ch}
#main-content{display:block;scroll-margin-top:96px}
:focus-visible{outline:2px solid var(--c-cyan);outline-offset:3px}
.visually-hidden{
  position:absolute!important;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;
}

/* ---------- 4. 容器与网格 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:clamp(16px,3vw,32px)}
.grid{display:grid;gap:clamp(16px,2vw,24px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-split{grid-template-columns:minmax(0,1.7fr) minmax(0,1fr)}
.section{padding-block:clamp(40px,6vw,80px)}
.divider{height:1px;background:var(--line);margin-block:clamp(24px,4vw,48px)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- 5. 通用排版组件 ---------- */
.display{font-size:clamp(38px,7vw,72px);font-weight:800;letter-spacing:-.035em;line-height:1.06}
.eyebrow{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--c-cyan);
}
.annotation{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.3em;
  text-transform:uppercase;color:var(--c-neutral);
}
.annotation-vertical{writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:.34em}
.data-number{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.score{font-family:var(--font-mono);font-size:clamp(20px,3vw,34px);color:var(--c-orange);letter-spacing:0}
.page-head{padding-block:clamp(28px,5vw,56px);border-bottom:1px solid var(--line)}

.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:14px 24px;
  margin-bottom:clamp(20px,3vw,36px);
  padding-bottom:14px;border-bottom:1px solid var(--line);
}
.section-index{font-family:var(--font-mono);font-size:12px;letter-spacing:.3em;color:var(--c-cyan)}
.section-title{font-size:clamp(24px,3.2vw,38px);font-weight:800;letter-spacing:-.02em}
.section-desc{font-size:15px;color:var(--c-neutral);max-width:48ch;margin-left:auto}

/* ---------- 6. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border:1px solid transparent;border-radius:var(--radius);
  font-size:13px;font-weight:700;letter-spacing:.06em;line-height:1.3;
  cursor:pointer;text-align:center;
  transition:background-color var(--t-fast) ease,color var(--t-fast) ease,
             border-color var(--t-fast) ease,transform var(--t-fast) ease;
}
.btn-primary{background:var(--c-cyan);border-color:var(--c-cyan);color:#06201A}
.btn-primary:hover{background:#5CF5D6;border-color:#5CF5D6}
.btn-ghost{background:var(--glass);border-color:var(--glass-line);color:var(--c-mist)}
.btn-ghost:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.btn-quiet{background:transparent;border-color:var(--line);color:var(--c-neutral)}
.btn-quiet:hover{border-color:var(--c-cyan);color:var(--c-cyan)}

/* ---------- 7. 页头 / 画框式导航 ---------- */
.skip-link{
  position:absolute;left:10px;top:-64px;z-index:120;
  padding:10px 16px;background:var(--c-cyan);color:#06201A;
  font-size:13px;font-weight:700;border-radius:var(--radius);
  transition:top var(--t-fast) ease;
}
.skip-link:focus{top:10px}

.site-header{
  position:relative;z-index:60;
  background:linear-gradient(180deg,rgba(14,43,36,.97) 0%,rgba(11,15,14,.94) 100%);
  border-bottom:1px solid var(--line);
}
.site-header[data-stuck]{background:linear-gradient(180deg,rgba(11,15,14,.99),rgba(11,15,14,.97))}

.header-progress{height:2px;background:rgba(232,241,237,.07);overflow:hidden}
.header-progress-bar{
  display:block;height:100%;width:0;
  background:linear-gradient(90deg,var(--c-cyan),var(--c-orange));
  transition:width 120ms linear;
}

.header-frame{
  width:100%;max-width:1440px;margin-inline:auto;
  padding:12px clamp(16px,3vw,32px);
  display:flex;align-items:center;gap:clamp(16px,3vw,40px);flex-wrap:wrap;
}

.header-brand{display:flex;flex-direction:column;gap:2px;flex:0 0 auto}
.brand-link{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.28em;
  color:var(--c-cyan);background:var(--glass);border:1px solid var(--glass-line);
  padding:4px 8px;border-radius:var(--radius);
}
.brand-name{font-size:21px;font-weight:800;letter-spacing:.04em;color:var(--c-mist)}
.brand-link:hover .brand-name{color:var(--c-cyan)}
.brand-tagline{font-size:12px;color:var(--c-neutral);letter-spacing:.02em}

.header-main{
  display:flex;align-items:center;gap:clamp(14px,2vw,26px);
  margin-left:auto;padding-left:clamp(14px,2vw,26px);
  border-left:1px solid var(--line);
}
.header-status{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--c-neutral);max-width:none;
}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--c-cyan);box-shadow:0 0 0 4px rgba(40,240,200,.16);flex:0 0 auto}
.status-text{white-space:nowrap}
.status-meta{color:var(--c-cyan);white-space:nowrap}

.site-nav{display:flex;align-items:center;gap:clamp(12px,1.6vw,22px)}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{list-style:none}
.nav-link{
  display:block;padding:9px 11px;font-size:14px;letter-spacing:.03em;
  color:var(--c-mist);border-bottom:2px solid transparent;
  transition:color var(--t-fast) ease,background-color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.nav-link:hover{color:var(--c-cyan);background:var(--glass)}
.nav-link[aria-current="page"]{color:var(--c-cyan);border-bottom-color:var(--c-cyan)}
.header-actions{display:flex;align-items:center;gap:10px}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;border:1px solid var(--glass-line);border-radius:var(--radius);
  background:var(--glass);color:var(--c-mist);
  font-size:12px;font-weight:700;letter-spacing:.16em;
}
.nav-toggle:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:16px}
.nav-toggle-bars span{display:block;height:1.5px;background:currentColor;transition:transform var(--t-fast) ease,opacity var(--t-fast) ease}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle-text{white-space:nowrap}

.nav-scrim{display:none}

/* ---------- 8. 左侧轮次刻度条 ---------- */
.round-rail{display:none}

@media (min-width:1280px){
  :root{--rail-w:46px}
  .round-rail{
    display:flex;flex-direction:column;align-items:center;gap:16px;
    position:fixed;left:0;top:0;bottom:0;width:var(--rail-w);
    padding:104px 0 24px;z-index:55;pointer-events:none;
    background:linear-gradient(180deg,rgba(14,43,36,.94),rgba(11,15,14,.94));
    border-right:1px solid var(--line);
  }
  .rail-label{
    writing-mode:vertical-rl;font-family:var(--font-mono);font-size:10px;
    letter-spacing:.3em;color:var(--c-neutral);max-width:none;
  }
  .rail-ticks{display:flex;flex-direction:column;align-items:center;gap:14px}
  .rail-tick{
    display:flex;flex-direction:column;align-items:center;gap:4px;
    font-family:var(--font-mono);font-size:11px;color:var(--c-neutral);
  }
  .rail-tick::after{content:"";display:block;width:12px;height:1px;background:currentColor;opacity:.6}
  .rail-tick.is-current{color:var(--c-cyan);font-weight:700}
  .rail-tick.is-current::after{width:20px;height:2px;background:var(--c-cyan);opacity:1}
}

/* ---------- 9. 页脚 ---------- */
.site-footer{
  margin-top:clamp(48px,7vw,96px);
  background:linear-gradient(180deg,rgba(14,43,36,.65),rgba(11,15,14,.98));
  border-top:1px solid var(--glass-line);
  color:var(--c-mist);
}
.footer-frame{
  width:100%;max-width:var(--container);margin-inline:auto;
  padding:clamp(36px,5vw,68px) clamp(16px,3vw,32px) clamp(24px,3vw,36px);
}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1fr) 2fr;
  gap:clamp(24px,4vw,56px);align-items:start;
}
.footer-brand{display:flex;flex-direction:column;gap:12px}
.footer-brand-line{font-size:14px;color:var(--c-body);max-width:34ch}
.footer-note{font-size:12.5px;color:var(--c-neutral);max-width:34ch}
.footer-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col-title{
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.3em;text-transform:uppercase;color:var(--c-cyan);
}
.footer-links{display:grid;gap:9px}
.footer-links a{
  font-size:14px;color:var(--c-body);
  border-bottom:1px solid transparent;
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease;
}
.footer-links a:hover{color:var(--c-cyan);border-bottom-color:var(--glass-line)}

.footer-contact{
  margin-top:clamp(28px,4vw,48px);padding-top:24px;
  border-top:1px solid var(--line);
  display:grid;gap:16px;
}
.footer-contact-list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px 24px;
}
.contact-item{display:flex;flex-direction:column;gap:3px}
.contact-label{
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.24em;
  text-transform:uppercase;color:var(--c-neutral);
}
.contact-value{font-size:14px;color:var(--c-mist);word-break:break-word}
.footer-contact-note{font-size:12.5px;color:var(--c-neutral);max-width:70ch}

.footer-meta{
  margin-top:24px;padding-top:18px;
  border-top:1px dashed var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px;
  font-size:12.5px;color:var(--c-neutral);
}
.footer-legal{max-width:none}
.footer-icp{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;
  color:var(--c-neutral);max-width:none;
}
.footer-meta .to-top{margin-left:auto}
.to-top{opacity:.6}
.to-top[data-visible]{opacity:1;border-color:var(--c-cyan);color:var(--c-cyan)}

/* ---------- 10. 面板 / 卡片 / 标签 ---------- */
.glass-panel{
  background:var(--glass);border:1px solid var(--glass-line);
  border-radius:var(--radius);padding:clamp(16px,2.2vw,24px);
}
.paper-panel{
  background:var(--c-paper);color:var(--c-charcoal-text);
  border-radius:var(--radius);padding:clamp(20px,3vw,40px);
}
.paper-panel h2,.paper-panel h3,.paper-panel h4{color:var(--c-charcoal-text)}
.paper-panel .eyebrow,.paper-panel .section-index{color:var(--c-cyan-deep)}
.paper-panel a{color:var(--c-cyan-deep);border-bottom:1px solid rgba(12,92,74,.35)}
.paper-panel a:hover{border-bottom-color:var(--c-cyan-deep)}
.paper-panel :focus-visible{outline-color:var(--c-cyan-deep)}

.card{
  display:flex;flex-direction:column;gap:10px;
  padding:clamp(16px,2.2vw,24px);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(20,69,58,.55),rgba(14,43,36,.32));
  border:1px solid var(--line);
  transition:transform var(--t-base) ease,background var(--t-base) ease,border-color var(--t-base) ease;
}
.card:hover{
  transform:translateY(-3px);
  background:linear-gradient(180deg,rgba(20,69,58,.82),rgba(14,43,36,.5));
  border-color:var(--glass-line);
}
.card:focus-within{border-color:var(--c-cyan)}
.card-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px}
.card-title{font-size:clamp(17px,1.6vw,20px);font-weight:800;letter-spacing:-.01em}
.card-body{font-size:14.5px;color:var(--c-body)}
.card-meta{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--c-neutral);
}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;border:1px solid var(--line);border-radius:var(--radius);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;
  color:var(--c-neutral);background:rgba(232,241,237,.04);
}
.tag-cyan{color:var(--c-cyan);border-color:var(--glass-line);background:var(--glass)}
.tag-orange{color:var(--c-orange);border-color:rgba(255,138,61,.35);background:rgba(255,138,61,.08)}
.tag-alert{color:var(--c-alert);border-color:rgba(255,107,74,.4);background:rgba(255,107,74,.1)}

.stat{
  display:flex;flex-direction:column;gap:4px;
  padding:14px 16px;border-left:2px solid var(--c-cyan);
  background:rgba(232,241,237,.03);
}
.stat-value{font-family:var(--font-mono);font-size:clamp(22px,2.6vw,32px);color:var(--c-orange);letter-spacing:0}
.stat-label{font-size:12px;letter-spacing:.12em;color:var(--c-neutral)}

/* ---------- 11. 记录流 / 时间轴 / 筛选 ---------- */
.record-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.record-item{
  display:grid;grid-template-columns:64px minmax(0,1fr) auto;gap:16px;align-items:baseline;
  padding:14px 16px;background:var(--c-carbon);
  transition:background-color var(--t-fast) ease;
}
.record-item:hover{background:var(--c-ink)}
.record-time{font-family:var(--font-mono);font-size:13px;color:var(--c-cyan)}
.record-main{font-size:15px;color:var(--c-mist)}
.record-snippet{font-size:13px;color:var(--c-neutral);grid-column:2 / -1}

.timeline{
  position:relative;display:grid;gap:clamp(18px,2.4vw,28px);
  padding-left:28px;border-left:1px solid var(--line);
}
.timeline-item{position:relative}
.timeline-mark{
  position:absolute;left:-34.5px;top:9px;width:11px;height:11px;
  border:1px solid var(--c-cyan);border-radius:50%;background:var(--c-carbon);
}
.timeline-item.is-current .timeline-mark{background:var(--c-cyan);box-shadow:0 0 0 5px rgba(40,240,200,.16)}
.timeline-year{font-family:var(--font-mono);font-size:12px;letter-spacing:.22em;color:var(--c-cyan)}
.timeline-body{font-size:14.5px;color:var(--c-body)}

.filter-bar{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  padding:12px;border:1px solid var(--glass-line);background:var(--glass);
  border-radius:var(--radius);
}
.filter-group{display:flex;flex-wrap:wrap;gap:8px}
.filter-chip{
  padding:7px 12px;border:1px solid var(--line);border-radius:var(--radius);
  font-size:13px;color:var(--c-mist);background:rgba(232,241,237,.03);
  transition:color var(--t-fast) ease,border-color var(--t-fast) ease,background-color var(--t-fast) ease;
}
.filter-chip:hover{border-color:var(--c-cyan);color:var(--c-cyan)}
.filter-chip[aria-pressed="true"]{background:var(--c-cyan);border-color:var(--c-cyan);color:#06201A;font-weight:700}

/* ---------- 12. 正文 / 面包屑 / 图片容器 ---------- */
.prose{max-width:68ch}
.prose p{margin-bottom:1.05em;color:var(--c-body);line-height:1.85}
.prose h2{margin:1.6em 0 .55em}
.prose h3{margin:1.3em 0 .5em}
.prose ul,.prose ol{list-style:disc;padding-left:1.4em;margin-bottom:1.05em;color:var(--c-body)}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.5em}
.prose strong{color:var(--c-mist)}
.prose a{color:var(--c-cyan);border-bottom:1px solid rgba(40,240,200,.4)}
.prose a:hover{border-bottom-color:var(--c-cyan)}
.prose blockquote{border-left:2px solid var(--c-cyan);padding-left:16px;color:var(--c-neutral)}
.paper-panel .prose p,.paper-panel .prose ul,.paper-panel .prose ol,.paper-panel .prose li{color:#28362F}
.paper-panel .prose strong{color:var(--c-charcoal-text)}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding-block:14px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--c-neutral);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item::after{content:"/";color:rgba(143,167,160,.45)}
.breadcrumb-item:last-child::after{content:""}
.breadcrumb-item a:hover{color:var(--c-cyan)}
.breadcrumb-item[aria-current="page"]{color:var(--c-mist)}

.media-frame{
  position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);
  aspect-ratio:16 / 9;
  background:linear-gradient(135deg,rgba(20,69,58,.9),rgba(11,15,14,.92));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(11,15,14,0),rgba(11,15,14,.5));
}
.media-frame-wide{aspect-ratio:21 / 9}
.media-frame-tall{aspect-ratio:3 / 4}
.media-caption{
  margin-top:10px;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.06em;color:var(--c-neutral);max-width:none;
}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1180px){
  .status-text{display:none}
}
@media (max-width:1024px){
  .header-main{border-left:0;padding-left:0;gap:14px}
  .header-status{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:2;
    width:min(88vw,360px);
    display:flex;flex-direction:column;align-items:stretch;gap:8px;
    padding:88px 22px 32px;
    background:linear-gradient(180deg,rgba(14,43,36,.99),rgba(11,15,14,.99));
    border-left:1px solid var(--glass-line);
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform var(--t-base) ease;
  }
  .site-nav[data-open]{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-link{font-size:17px;padding:14px 8px;border-bottom:1px solid var(--line);border-left:2px solid transparent}
  .nav-link[aria-current="page"]{border-bottom-color:var(--line);border-left-color:var(--c-cyan)}
  .header-actions{flex-direction:column;align-items:stretch;gap:10px;margin-top:18px}
  .nav-scrim{display:none}
  .site-header[data-nav-open] .nav-scrim{
    display:block;position:fixed;inset:0;z-index:1;background:rgba(11,15,14,.72);
  }
}
@media (max-width:900px){
  .grid-2,.grid-3,.grid-split{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}
  .record-item{grid-template-columns:56px minmax(0,1fr)}
  .record-snippet{grid-column:1 / -1}
  .section-desc{margin-left:0}
}
@media (max-width:640px){
  .header-brand{width:100%}
  .header-main{width:100%;justify-content:space-between}
  .brand-tagline{font-size:11.5px}
  .footer-columns{grid-template-columns:1fr}
  .footer-meta .to-top{margin-left:0;width:100%}
  .btn{padding:11px 14px}
}

/* ---------- 14. 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;scroll-behavior:auto!important;
  }
  .card:hover{transform:none}
}