/* ============================================================
   完美体育官网 · 共享样式表 /assets/site.css
   刻度 · 框景 · 数据叙事 · 直角精密网格
   ============================================================ */

/* 1. Reset ------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-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}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
img,svg,video{display:block;max-width:100%}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid #FF6A1A;outline-offset:3px}

/* 2. 变量 -------------------------------------------------- */
:root{
  --c-orange:#FF6A1A;
  --c-blue:#0E2A47;
  --c-blue-deep:#0A1E33;
  --c-lime:#B8FF3C;
  --c-terra:#C4622D;
  --c-slate:#5B6470;
  --c-moss:#3F6B52;
  --c-cream:#F6F3EC;
  --c-mist:#E4E7EA;
  --c-ink:#101418;

  --u:24px;
  --s1:24px;
  --s2:48px;
  --s3:72px;
  --s4:96px;

  --maxw:1240px;
  --narrow:820px;
  --ease:cubic-bezier(.22,1,.36,1);
  --dur:240ms;

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

/* 3. 基础与中文排版 --------------------------------------- */
body{
  background:var(--c-cream);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body::selection{background:var(--c-lime);color:var(--c-blue)}

.display{
  font-size:clamp(48px,9vw,132px);
  font-weight:900;
  line-height:.9;
  letter-spacing:-.02em;
  color:var(--c-blue);
}
.display--lean{transform:skewX(-3deg);transform-origin:left bottom}
.h-xl{font-size:clamp(24px,3vw,32px);font-weight:900;line-height:1.15;letter-spacing:-.01em;color:var(--c-blue)}
.h-md{font-size:20px;font-weight:800;line-height:1.3;color:var(--c-blue)}
.index-text{font-size:12px;font-weight:500;line-height:1.4;letter-spacing:.24em;color:var(--c-slate)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* 4. 布局容器 --------------------------------------------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--s1)}
.wrap--narrow{max-width:var(--narrow)}
.section{padding-block:var(--s4)}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:var(--s1);margin-bottom:var(--s2)}
.section__index{font-size:12px;font-weight:500;letter-spacing:.24em;color:var(--c-terra)}
.section__title{font-size:clamp(26px,3.4vw,44px);font-weight:900;line-height:1.05;letter-spacing:-.01em;color:var(--c-blue)}
.section__lede{max-width:640px;font-size:16px;color:var(--c-slate)}
.prose{max-width:640px;font-size:17px;line-height:1.75}
.prose p + p{margin-top:1.2em}
.prose h2{margin-top:1.8em;font-size:24px;font-weight:800;line-height:1.3;color:var(--c-blue)}
.prose h3{margin-top:1.4em;font-size:20px;font-weight:800;color:var(--c-blue)}
.prose ul{margin-top:.8em;display:grid;gap:8px}
.prose li{padding-left:18px;position:relative}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--c-orange)}
.rule{height:1px;background:var(--c-mist);border:0}

.grid{display:grid;gap:var(--s2)}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--8-4{grid-template-columns:8fr 4fr}
.grid--3{grid-template-columns:repeat(3,1fr)}

/* 5. 框景与装饰 ------------------------------------------- */
.frame{position:relative;border:1px solid var(--c-blue);background:var(--c-cream);padding:var(--s3) var(--s2) var(--s2)}
.frame__ticks{
  position:absolute;top:0;left:0;right:0;height:10px;
  background-image:repeating-linear-gradient(90deg,var(--c-slate) 0 1px,transparent 1px 16px);
  opacity:.45;pointer-events:none;
}
.frame__corner{position:absolute;width:14px;height:14px;border:2px solid var(--c-orange);pointer-events:none}
.frame__corner--tl{top:-1px;left:-1px;border-right:0;border-bottom:0}
.frame__corner--tr{top:-1px;right:-1px;border-left:0;border-bottom:0}
.frame__corner--bl{bottom:-1px;left:-1px;border-right:0;border-top:0}
.frame__corner--br{bottom:-1px;right:-1px;border-left:0;border-top:0}
.frame__body{position:relative}

/* 6. 卡片 / 标签 / 数字块 --------------------------------- */
.card{
  display:grid;gap:12px;
  background:#FFFFFF;
  border:1px solid var(--c-mist);
  border-top:3px solid var(--c-blue);
  padding:var(--s1);
}
.card--accent{border-top-color:var(--c-orange)}
.card__meta{font-size:12px;letter-spacing:.2em;color:var(--c-slate)}
.card__title{font-size:20px;font-weight:800;line-height:1.3;color:var(--c-blue)}
.card__text{font-size:15px;color:var(--c-slate)}
[data-filter-item][hidden]{display:none}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;font-size:12px;letter-spacing:.14em;
  border:1px solid var(--c-slate);color:var(--c-slate);background:transparent;
  clip-path:polygon(9px 0,100% 0,100% 100%,0 100%,0 9px);
}
.tag--lime{border-color:var(--c-lime);background:var(--c-lime);color:var(--c-blue)}
.tag--terra{border-color:var(--c-terra);color:var(--c-terra)}
.tag--moss{border-color:var(--c-moss);color:var(--c-moss)}

.stat{display:grid;gap:2px;padding-left:14px;border-left:2px solid var(--c-orange)}
.stat__num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:clamp(26px,3vw,40px);font-weight:700;line-height:1;color:var(--c-blue)}
.stat__label{font-size:12px;letter-spacing:.2em;color:var(--c-slate)}

/* 7. 时间轴 ----------------------------------------------- */
.timeline{position:relative;display:grid;gap:var(--s2);padding-left:32px}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:var(--c-mist)}
.timeline__item{position:relative}
.timeline__marker{position:absolute;left:-32px;top:6px;width:11px;height:11px;border:2px solid var(--c-terra);background:var(--c-cream)}
.timeline__item--done .timeline__marker{border-color:var(--c-moss);background:var(--c-moss)}
.timeline__item--live .timeline__marker{border-color:var(--c-blue);background:var(--c-lime);animation:pulse 1.6s var(--ease) infinite}
.timeline__body{display:grid;gap:8px}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.82)}}

/* 8. 图像容器（页面阶段放置 <img> 或内联 SVG） ----------- */
.media-frame{
  position:relative;overflow:hidden;
  border:1px solid var(--c-blue);
  background:linear-gradient(135deg,var(--c-mist),#FFFFFF);
  aspect-ratio:16/9;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-frame > img,.media-frame > svg,.media-frame > picture > img{width:100%;height:100%;object-fit:cover}
.media-frame--duo::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(135deg,rgba(14,42,71,.62),rgba(255,106,26,.34));
  mix-blend-mode:multiply;
}
.media-frame__caption{
  position:absolute;left:0;bottom:0;right:0;
  padding:10px 14px;background:rgba(14,42,71,.86);color:var(--c-cream);
  font-size:12px;letter-spacing:.18em;
}

/* 9. 可展开内容组 ----------------------------------------- */
.disclosure{border-top:1px solid var(--c-mist)}
.disclosure:last-child{border-bottom:1px solid var(--c-mist)}
.disclosure__trigger{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;text-align:left;padding:18px 0 18px 16px;
  border-left:3px solid var(--c-mist);
  font-size:18px;font-weight:700;color:var(--c-blue);
  transition:border-color var(--dur) var(--ease),color var(--dur) var(--ease);
}
.disclosure__trigger:hover{border-left-color:var(--c-terra)}
.disclosure[data-open="true"] .disclosure__trigger{border-left-color:var(--c-orange)}
.disclosure__state{flex:none;font-size:11px;letter-spacing:.2em;color:var(--c-slate)}
.disclosure[data-open="true"] .disclosure__state{color:var(--c-orange)}
.disclosure__icon{flex:none;position:relative;width:14px;height:14px;margin-left:auto}
.disclosure__icon::before,.disclosure__icon::after{content:"";position:absolute;background:var(--c-orange)}
.disclosure__icon::before{left:0;top:6px;width:14px;height:2px}
.disclosure__icon::after{left:6px;top:0;width:2px;height:14px;transition:transform var(--dur) var(--ease)}
.disclosure[data-open="true"] .disclosure__icon::after{transform:scaleY(0)}
.disclosure__panel{max-height:0;overflow:hidden;transition:max-height 320ms var(--ease)}
.disclosure[data-open="true"] .disclosure__panel{max-height:640px}
.disclosure__inner{max-width:640px;padding:0 0 var(--s1) 16px;color:var(--c-slate);font-size:16px}

/* 10. 标签筛选 -------------------------------------------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:16px;border-bottom:1px solid var(--c-mist)}
.filter-chip{
  padding:7px 14px;font-size:13px;letter-spacing:.08em;color:var(--c-slate);
  border:1px solid var(--c-slate);
  clip-path:polygon(9px 0,100% 0,100% 100%,0 100%,0 9px);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.filter-chip:hover{border-color:var(--c-orange);color:var(--c-orange)}
.filter-chip[aria-pressed="true"]{background:var(--c-blue);border-color:var(--c-blue);color:var(--c-lime)}
.filter-status{padding-top:12px;font-size:12px;letter-spacing:.16em;color:var(--c-slate)}

/* 11. 按钮 ------------------------------------------------ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 20px;border:1px solid var(--c-blue);
  font-size:14px;font-weight:700;letter-spacing:.06em;line-height:1;
  color:var(--c-blue);background:transparent;
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.btn--primary{background:var(--c-orange);border-color:var(--c-orange);color:var(--c-blue-deep)}
.btn--primary:hover{background:var(--c-blue);border-color:var(--c-blue);color:var(--c-cream)}
.btn--ghost{border-color:currentColor}
.btn--ghost:hover{background:var(--c-blue);border-color:var(--c-blue);color:var(--c-cream)}
.btn--lime{background:var(--c-lime);border-color:var(--c-lime);color:var(--c-blue)}
.btn--lime:hover{background:var(--c-cream);border-color:var(--c-cream);color:var(--c-blue)}
.btn--block{display:flex;width:100%}

/* 12. 面包屑 ---------------------------------------------- */
.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;letter-spacing:.16em;color:var(--c-slate)}
.breadcrumbs__item{display:flex;align-items:center;gap:10px}
.breadcrumbs__sep{color:var(--c-terra)}
.breadcrumbs a:hover{color:var(--c-orange)}

/* 13. 顶部刻度进度 ---------------------------------------- */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:90;background:rgba(16,20,24,.08);pointer-events:none}
.scroll-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--c-orange),var(--c-lime))}

/* 14. 站点头部 -------------------------------------------- */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-cream)}
.skip-link{
  position:absolute;left:12px;top:-64px;z-index:120;
  padding:10px 18px;background:var(--c-blue);color:var(--c-lime);
  font-size:13px;letter-spacing:.1em;
  transition:top var(--dur) var(--ease);
}
.skip-link:focus{top:12px}
.header-scale{
  height:10px;background-color:var(--c-blue);
  background-image:repeating-linear-gradient(90deg,transparent 0 10px,rgba(246,243,236,.42) 10px 11px);
}
.masthead{background:var(--c-cream);border-bottom:1px solid var(--c-mist);padding-block:18px}
.masthead__inner{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:var(--u)}
.masthead__side{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.masthead__side--start{justify-content:flex-start}
.masthead__side--end{justify-content:flex-end}
.masthead__dot{display:inline-block;width:8px;height:8px;background:var(--c-lime);border:1px solid var(--c-blue)}
.masthead__brand{text-align:center}
.masthead__cta{white-space:nowrap}
.brand-lockup{display:inline-grid;gap:6px;justify-items:center;text-align:center}
.brand-lockup::after{content:"";display:block;width:34px;height:4px;background:var(--c-orange);transform:skewX(-18deg)}
.brand-lockup__name{font-size:clamp(22px,2.6vw,32px);font-weight:900;line-height:1;letter-spacing:-.01em;color:var(--c-blue)}
.brand-lockup__tag{font-size:11px;font-weight:500;letter-spacing:.3em;color:var(--c-slate)}
.brand-lockup--invert{justify-items:start;text-align:left}
.brand-lockup--invert .brand-lockup__name{color:var(--c-cream)}
.brand-lockup--invert .brand-lockup__tag{color:var(--c-lime)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:9px 14px;border:1px solid var(--c-blue);background:transparent;color:var(--c-blue);
  font-size:12px;font-weight:700;letter-spacing:.2em;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px}
.nav-toggle__bar{display:block;height:2px;background:var(--c-blue);transition:transform var(--dur) var(--ease),opacity var(--dur) var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__text{line-height:1}

.mainnav{background:var(--c-blue);border-top:2px solid var(--c-orange);color:var(--c-cream)}
.mainnav__list{display:flex;flex-wrap:wrap;justify-content:center}
.mainnav__link{
  display:block;padding:15px 22px;
  font-size:15px;font-weight:700;letter-spacing:.06em;
  color:rgba(246,243,236,.82);
  transition:background var(--dur) var(--ease),color var(--dur) var(--ease);
}
.mainnav__item + .mainnav__item .mainnav__link{border-left:1px solid rgba(246,243,236,.16)}
.mainnav__link:hover{color:var(--c-lime);background:rgba(246,243,236,.07)}
.mainnav__link[aria-current="page"]{background:var(--c-lime);color:var(--c-blue)}

/* 15. 站点页脚 -------------------------------------------- */
.site-footer{margin-top:var(--s4);background:var(--c-blue);color:var(--c-cream)}
.footer-scale{height:10px;background-color:var(--c-orange);background-image:repeating-linear-gradient(90deg,transparent 0 10px,var(--c-blue) 10px 11px)}
.footer-grid{display:grid;grid-template-columns:5fr 7fr;gap:var(--s3);padding-block:var(--s3)}
.footer-brand{display:grid;gap:18px;align-content:start}
.footer-slogan{max-width:16em;font-size:20px;font-weight:700;line-height:1.5;color:var(--c-cream)}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--s2)}
.footer-col__title{margin-bottom:14px;font-size:11px;font-weight:700;letter-spacing:.24em;color:var(--c-lime)}
.footer-list{display:grid;gap:10px}
.footer-link{
  display:inline-block;font-size:15px;color:rgba(246,243,236,.78);
  border-bottom:1px solid transparent;
  transition:color var(--dur) var(--ease),border-color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--c-orange);border-bottom-color:var(--c-orange)}
.footer-contact{
  display:flex;flex-wrap:wrap;gap:14px 40px;align-items:baseline;
  padding-block:20px;border-top:1px solid rgba(246,243,236,.16);border-bottom:1px solid rgba(246,243,236,.16);
}
.footer-contact__item{display:flex;align-items:baseline;gap:10px}
.footer-contact__label{flex:none;font-size:11px;letter-spacing:.2em;color:var(--c-lime)}
.footer-contact__value{font-family:var(--font-mono);font-size:14px;color:rgba(246,243,236,.86)}
.footer-note{max-width:72ch;padding-top:16px;font-size:13px;color:rgba(246,243,236,.58)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-block:22px 36px;font-size:12px;letter-spacing:.12em;color:rgba(246,243,236,.58);
}
.footer-toplink{color:var(--c-lime);border-bottom:1px solid transparent;transition:border-color var(--dur) var(--ease)}
.footer-toplink:hover{border-bottom-color:var(--c-lime)}

/* 16. 入场显现 -------------------------------------------- */
html.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity 480ms var(--ease),transform 480ms var(--ease)}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* 17. 响应式 ---------------------------------------------- */
@media (max-width:1080px){
  .grid--7-5,.grid--8-4{grid-template-columns:1fr}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr;gap:var(--s2)}
}
@media (max-width:900px){
  :root{--s4:72px;--s3:56px}
  .masthead__inner{grid-template-columns:1fr auto;gap:12px}
  .masthead__side--start{display:none}
  .masthead__brand{text-align:left}
  .brand-lockup{justify-items:start;text-align:left}
  .nav-toggle{display:inline-flex}
  .mainnav__list{flex-direction:column;flex-wrap:nowrap;justify-content:flex-start;max-height:0;overflow:hidden;transition:max-height 320ms var(--ease)}
  .mainnav[data-open="true"] .mainnav__list{max-height:560px}
  .mainnav[data-open="true"]{box-shadow:0 18px 30px rgba(14,42,71,.3)}
  .mainnav__item + .mainnav__item .mainnav__link{border-left:0}
  .mainnav__link{border-top:1px solid rgba(246,243,236,.16);padding:16px 0;font-size:16px}
  .mainnav__link[aria-current="page"]{padding-left:8px}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:640px){
  :root{--u:18px;--s1:18px;--s2:36px;--s3:44px;--s4:60px}
  body{font-size:16px}
  .grid--3{grid-template-columns:1fr}
  .frame{padding:var(--s2) var(--s1) var(--s1)}
  .footer-nav{grid-template-columns:1fr;gap:var(--s1)}
  .footer-contact__item{display:grid;gap:2px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .masthead__cta{padding:10px 14px;font-size:13px}
}

/* 18. 动效克制与无障碍 ------------------------------------ */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .timeline__item--live .timeline__marker{animation:none}
}