/* =========================================================
   意昂体育 · 共享样式表 /assets/site.css
   骨架：深靛底 + 1px 精密网格 + 青柠/暖橙双锚点
   ========================================================= */

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

/* ---------- tokens ---------- */
:root{
  --ink-900:#070B22;
  --ink-800:#0E1533;
  --indigo-700:#1B2456;
  --line-500:#2C3766;
  --paper-050:#EEF1FF;
  --paper-300:#A9B2D9;
  --lime-400:#C8FF4D;
  --lime-600:#8FD400;
  --orange-500:#FF7A33;
  --orange-200:#FFC79E;
  --amber-600:#FFB020;
  --slate-700:#5A648F;

  --font-head:"Helvetica Neue",Helvetica,"Arial Narrow","PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Roboto Mono","Courier New",monospace;

  --dur:120ms;
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:64px;
  --shell-w:min(1460px, calc(100% - clamp(28px,7vw,96px)));
}

/* ---------- base ---------- */
html{background:var(--ink-900)}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}

body{
  min-height:100vh;
  background-color:var(--ink-900);
  background-image:
    linear-gradient(to right, rgba(44,55,102,.30) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(44,55,102,.30) 1px, transparent 1px);
  background-size:96px 96px;
  background-position:top center;
  color:var(--paper-050);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.85;
  letter-spacing:.01em;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4,h5,.font-head{
  font-family:var(--font-head);
  font-weight:700;
  line-height:1.16;
  letter-spacing:.02em;
  color:var(--paper-050);
}

strong{font-weight:500;color:var(--paper-050)}
small{font-size:12px}

:focus-visible{outline:2px solid var(--lime-400);outline-offset:2px}
.btn-lime:focus-visible,
.nav-link[aria-current="page"]:focus-visible{outline-color:var(--paper-050)}

::selection{background:var(--lime-400);color:var(--ink-900)}

/* ---------- 布局骨架 ---------- */
.shell{width:var(--shell-w);margin-inline:auto}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(12px,1.6vw,26px);
}
@media (max-width:900px){.grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}}
@media (max-width:560px){.grid-12{grid-template-columns:repeat(2,minmax(0,1fr))}}

#main-content{display:block;scroll-margin-top:calc(var(--header-h) + 18px)}
.rule{height:1px;background:var(--line-500);border:0;margin:0}

/* ---------- 文字基础件 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--paper-300);
}
.eyebrow::before{content:"";width:8px;height:8px;background:var(--lime-400);display:block;flex:none}

.display-1{font-family:var(--font-head);font-weight:700;font-size:clamp(48px,7vw,112px);line-height:1.02;letter-spacing:.01em}
.section-title{font-family:var(--font-head);font-weight:700;font-size:clamp(30px,4.4vw,48px);line-height:1.12}
.lead{font-size:clamp(17px,1.5vw,19px);line-height:1.8;color:var(--paper-300);max-width:60ch}
.prose{max-width:68ch;font-size:17px;line-height:1.85;color:var(--paper-050)}
.prose p+p{margin-top:1.1em}
.prose a{color:var(--lime-400);text-decoration:none;border-bottom:1px solid var(--line-500)}
.prose a:hover{border-bottom-color:var(--lime-400)}

.figure-lg{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(56px,10vw,112px);
  line-height:.92;
  letter-spacing:-.02em;
  color:var(--lime-400);
  font-variant-numeric:tabular-nums;
}
.figure-lg--orange{color:var(--orange-500)}

.vert-label{
  writing-mode:vertical-rl;
  text-orientation:mixed;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--paper-300);
}

/* ---------- 标签 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 9px;
  border:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--paper-300);background:transparent;border-radius:2px;
}
.tag-lime{border-color:var(--lime-400);color:var(--ink-900);background:var(--lime-400)}
.tag-orange{border-color:var(--orange-500);color:var(--orange-500)}
.tag-amber{border-color:var(--amber-600);color:var(--amber-600)}

/* ---------- 面包屑 ---------- */
.breadcrumb{width:var(--shell-w);margin-inline:auto;padding:22px 0 0}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--slate-700)}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item a{color:var(--paper-300);text-decoration:none;transition:color var(--dur) var(--ease)}
.breadcrumb-item a:hover{color:var(--lime-400)}
.breadcrumb-item[aria-current="page"]{color:var(--lime-400)}
.breadcrumb-sep{color:var(--line-500)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:9px 14px;
  border:1px solid var(--line-500);
  border-radius:2px;
  color:var(--paper-050);
  font-family:var(--font-head);
  font-size:13px;font-weight:600;letter-spacing:.06em;
  text-decoration:none;white-space:nowrap;cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.btn-ghost:hover{border-color:var(--lime-400);color:var(--lime-400)}
.btn-lime{background:var(--lime-400);border-color:var(--lime-400);color:var(--ink-900)}
.btn-lime:hover{background:var(--lime-600);border-color:var(--lime-600);color:var(--ink-900)}

/* ---------- 图片占位基础规则 ---------- */
.media-frame{
  position:relative;display:block;width:100%;margin:0;
  background:var(--ink-800);
  border:1px solid var(--line-500);
  border-radius:2px;
  overflow:hidden;
}
.media-frame img{width:100%;height:100%;object-fit:cover;filter:saturate(.86) contrast(1.06)}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-caption{
  margin-top:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  color:var(--paper-300);
}
.media-badge{
  position:absolute;left:0;bottom:0;
  padding:6px 10px;
  background:var(--ink-900);
  border-top:1px solid var(--line-500);
  border-right:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  color:var(--paper-300);
}

/* =========================================================
   页头：紧凑命令栏
   ========================================================= */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink-900);
  border-bottom:1px solid var(--line-500);
}

.skip-link{
  position:absolute;left:14px;top:-120px;z-index:90;
  padding:10px 16px;
  background:var(--lime-400);color:var(--ink-900);
  font-family:var(--font-head);font-size:13px;font-weight:600;letter-spacing:.08em;
  text-decoration:none;border-radius:2px;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}

.scroll-rail{position:absolute;left:0;right:0;top:0;height:2px;background:var(--indigo-700);overflow:hidden}
.scroll-rail-fill{
  display:block;height:100%;width:100%;
  background:var(--lime-400);
  transform:scaleX(var(--p,0));
  transform-origin:left center;
  transition:transform 90ms linear;
}

.header-inner{
  width:var(--shell-w);margin-inline:auto;
  min-height:var(--header-h);
  padding-block:8px;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto auto;
  grid-template-areas:"brand status nav tools";
  align-items:center;
  gap:clamp(10px,1.8vw,30px);
}

/* 品牌索引牌 */
.brand{
  grid-area:brand;
  display:inline-flex;align-items:center;gap:10px;
  text-decoration:none;color:var(--paper-050);
}
.brand-mark{
  flex:none;
  padding:5px 7px;
  background:var(--lime-400);color:var(--ink-900);
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.14em;line-height:1;
  border-radius:2px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-family:var(--font-head);font-size:19px;font-weight:700;letter-spacing:.1em}
.brand-sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:var(--paper-300)}
.brand:hover .brand-name{color:var(--lime-400)}

/* 状态提示 */
.header-status{
  grid-area:status;
  justify-self:start;
  display:inline-flex;align-items:center;gap:9px;
  padding-left:16px;
  border-left:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--paper-300);
}
.status-dot{
  width:7px;height:7px;flex:none;background:var(--lime-400);
  box-shadow:0 0 0 3px rgba(200,255,77,.16);
}

/* 主导航 */
.primary-nav{grid-area:nav;justify-self:end}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-flex;align-items:flex-start;gap:6px;
  padding:8px 10px;
  border:1px solid transparent;border-radius:2px;
  color:var(--paper-300);
  font-family:var(--font-head);font-size:13px;font-weight:600;letter-spacing:.04em;
  text-decoration:none;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.nav-index{font-family:var(--font-mono);font-size:10px;line-height:1.6;color:var(--slate-700);letter-spacing:.06em}
.nav-link:hover{
  color:var(--paper-050);
  background:var(--ink-800);
  border-color:var(--line-500);
  transform:translateY(-1px);
}
.nav-link:hover .nav-index{color:var(--lime-400)}
.nav-link[aria-current="page"]{
  background:var(--lime-400);
  border-color:var(--lime-400);
  color:var(--ink-900);
}
.nav-link[aria-current="page"] .nav-index{color:rgba(7,11,34,.6)}

/* 工具区 */
.header-tools{grid-area:tools;display:flex;align-items:center;gap:8px}

.cmd-trigger{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 11px;
  border:1px solid var(--line-500);border-radius:2px;
  color:var(--paper-300);cursor:pointer;
  font-family:var(--font-head);font-size:12px;font-weight:600;letter-spacing:.08em;
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.cmd-trigger-key{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;
  color:var(--lime-400);
}
.cmd-trigger:hover,
.cmd-trigger[aria-expanded="true"]{border-color:var(--lime-400);color:var(--paper-050);background:var(--ink-800)}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 12px;
  border:1px solid var(--line-500);border-radius:2px;
  color:var(--paper-050);cursor:pointer;
  font-family:var(--font-head);font-size:13px;font-weight:600;letter-spacing:.08em;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.nav-toggle-bars{display:inline-flex;flex-direction:column;gap:3px;width:14px}
.nav-toggle-bars span{display:block;height:1px;background:currentColor}
.nav-toggle:hover{border-color:var(--lime-400);color:var(--lime-400)}
.site-header[data-open="true"] .nav-toggle{background:var(--indigo-700);border-color:var(--lime-400);color:var(--lime-400)}

/* 快捷索引面板 */
.cmd-panel{
  max-height:min(72vh,540px);overflow:auto;
  border-top:1px solid var(--line-500);
  background:var(--ink-800);
}
.cmd-panel[hidden]{display:none}
.cmd-panel-inner{
  width:var(--shell-w);margin-inline:auto;
  padding:20px 0 26px;
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:1px;
  background:var(--line-500);
  border:1px solid var(--line-500);
  border-radius:2px;
}
.cmd-group{background:var(--ink-800);padding:14px 16px 16px}
.cmd-group-title{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--paper-300);margin-bottom:8px;
}
.cmd-link{
  display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:8px 0;
  border-bottom:1px solid var(--line-500);
  color:var(--paper-050);text-decoration:none;
  font-size:14px;
  transition:color var(--dur) var(--ease);
}
.cmd-link:last-child{border-bottom:0}
.cmd-link:hover{color:var(--lime-400)}
.cmd-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--slate-700);white-space:nowrap}
.cmd-link:hover .cmd-key{color:var(--orange-500)}

/* 页头断点 */
@media (max-width:1180px){
  .header-status{display:none}
  .nav-index{display:none}
  .header-inner{grid-template-columns:auto minmax(0,1fr) auto}
  grid-template-areas:"brand nav tools";
}
@media (max-width:1180px){
  .header-inner{grid-template-areas:"brand nav tools"}
}
@media (max-width:1024px){
  .cmd-trigger{display:none}
}
@media (max-width:900px){
  .header-inner{
    grid-template-columns:minmax(0,1fr) auto;
    grid-template-areas:"brand tools" "nav nav";
    padding-block:10px;
  }
  .primary-nav{justify-self:stretch;display:none}
  .site-header[data-open="true"] .primary-nav{display:block}
  .nav-toggle{display:inline-flex}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;border-top:1px solid var(--line-500)}
  .nav-link{padding:14px 4px;border:0;border-bottom:1px solid var(--line-500);border-radius:0;justify-content:flex-start;font-size:15px}
  .nav-index{display:inline;font-size:11px;color:var(--slate-700)}
  .nav-link[aria-current="page"] .nav-index{color:rgba(7,11,34,.65)}
  .header-tools .btn{padding:8px 11px;font-size:12px}
}
@media (max-width:420px){
  .brand-sub{display:none}
}

/* =========================================================
   页脚：展览说明牌
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,132px);
  border-top:1px solid var(--line-500);
  background:var(--ink-900);
  overflow:hidden;
}

.footer-vert{
  position:absolute;
  right:clamp(10px,2vw,26px);
  top:clamp(40px,6vw,84px);
  margin:0;
  writing-mode:vertical-rl;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.34em;text-transform:uppercase;
  color:var(--line-500);
  pointer-events:none;
}

.footer-top{
  display:grid;
  grid-template-columns:minmax(240px,1fr) minmax(0,1.7fr);
  gap:clamp(28px,4vw,72px);
  padding:clamp(44px,6vw,84px) 0 clamp(28px,3vw,44px);
}

.footer-brand{max-width:34ch}
.footer-index{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--lime-400);margin-bottom:14px;
}
.footer-wordmark{
  font-family:var(--font-head);font-size:clamp(34px,4.4vw,58px);font-weight:700;
  letter-spacing:.06em;line-height:1;
}
.footer-tagline{margin-top:14px;font-size:15px;color:var(--paper-300)}
.footer-note{
  margin-top:10px;padding-top:10px;border-top:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--slate-700);
}

.footer-nav{display:block}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,40px)}
.footer-col{border-top:1px solid var(--line-500);padding-top:14px}
.footer-col-title{
  font-family:var(--font-head);font-size:14px;font-weight:600;letter-spacing:.1em;
  color:var(--paper-050);margin-bottom:12px;display:flex;align-items:center;gap:8px;
}
.footer-col-title::before{content:"";width:7px;height:7px;background:var(--lime-400);flex:none}
.footer-links{display:flex;flex-direction:column;gap:2px}
.footer-link{
  display:inline-block;
  padding:5px 0;
  color:var(--paper-300);text-decoration:none;font-size:14px;
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--lime-400);border-bottom-color:var(--lime-400)}
.footer-link[aria-current="page"]{color:var(--lime-400)}

.footer-contact{
  display:flex;flex-wrap:wrap;gap:10px 34px;
  padding:18px 0;
  border-top:1px solid var(--line-500);
}
.footer-contact-item{display:inline-flex;align-items:baseline;gap:10px;font-size:13px;color:var(--paper-300)}
.footer-contact-key{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--slate-700)}

.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 28px;
  padding:16px 0 clamp(28px,4vw,44px);
  border-top:1px solid var(--line-500);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  color:var(--slate-700);
}
.footer-icp{color:var(--paper-300)}
.footer-sign{margin-left:auto;color:var(--line-500)}

@media (max-width:1180px){
  .footer-vert{display:none}
}
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr}
  .footer-brand{max-width:none}
  .footer-sign{margin-left:0}
}
@media (max-width:640px){
  .footer-cols{grid-template-columns:1fr 1fr}
}
@media (max-width:420px){
  .footer-cols{grid-template-columns:1fr}
}

/* ---------- 显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease);
}
[data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 无障碍与动效降级 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important}
  .nav-link:hover{transform:none}
  .scroll-rail-fill{transition:none}
}