/* =========================================================
   顺发体育 · 共享站点样式 /assets/site.css
   深色运动数据仪表盘基调：切角面板 / 刻度网格 / 等宽数字
   ========================================================= */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --sf-ink:#0A0D12;
  --sf-panel:#141A22;
  --sf-line:#26313C;
  --sf-neon:#C6FF3D;
  --sf-orange:#FF7A2F;
  --sf-ice:#6FD8FF;
  --sf-white:#F6F9FC;
  --sf-text:#D7E1EA;
  --sf-mist:#9FADBA;
  --sf-moss:#1B2A18;
  --sf-amber:#2A1A10;
  --sf-ice-deep:#123240;

  --sf-font-display:"Noto Sans SC","Archivo Black","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --sf-font-editorial:"Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sf-font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --sf-font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --sf-shell:1280px;
  --sf-header-h:78px;
  --sf-cut:16px;
  --sf-ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset 与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background-color:var(--sf-ink);
  background-image:
    linear-gradient(180deg,rgba(111,216,255,.055),rgba(10,13,18,0) 360px),
    repeating-linear-gradient(90deg,rgba(38,49,60,.34) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(38,49,60,.2) 0 1px,transparent 1px 96px);
  background-attachment:fixed;
  color:var(--sf-text);
  font-family:var(--sf-font-body);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg,video{max-width:100%;height:auto}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
a{color:var(--sf-ice);text-decoration:none}
a:hover{color:var(--sf-white)}
::selection{background:var(--sf-neon);color:var(--sf-ink)}
:focus-visible{outline:2px solid var(--sf-neon);outline-offset:3px}

/* ---------- 3. 中文排版与层级 ---------- */
.sf-h1,.sf-h2,.sf-h3{
  font-family:var(--sf-font-display);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.08;
  color:var(--sf-white);
  margin:0 0 .5em;
}
.sf-h1{font-size:clamp(38px,6.2vw,72px)}
.sf-h2{font-size:clamp(27px,3.4vw,40px)}
.sf-h3{font-size:clamp(20px,2vw,22px);line-height:1.3;letter-spacing:-.01em}
.sf-editorial{font-family:var(--sf-font-editorial);font-weight:600;letter-spacing:0}
.sf-lead{font-size:clamp(16.5px,1.5vw,19px);line-height:1.7;color:var(--sf-text);max-width:34ch;margin:0 0 1.2em}
.sf-prose{max-width:68ch}
.sf-prose h2{margin-top:1.9em}
.sf-prose h3{margin-top:1.5em}
.sf-prose p{margin:0 0 1.1em}
.sf-prose ul{list-style:none;margin:0 0 1.2em}
.sf-prose li{position:relative;padding-left:20px;margin-bottom:.5em}
.sf-prose li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:2px;background:var(--sf-neon)}
.sf-kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--sf-font-mono);
  font-size:13px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--sf-ice);margin:0 0 14px;
}
.sf-kicker::before{content:"";width:22px;height:1px;background:var(--sf-ice);display:inline-block}
.sf-mist{color:var(--sf-mist);font-size:14px}
.sf-num{font-family:var(--sf-font-mono);letter-spacing:.02em;font-variant-numeric:tabular-nums}

/* ---------- 4. 容器、网格、板块 ---------- */
.sf-shell{width:min(100% - 40px,var(--sf-shell));margin-inline:auto}
.sf-main{display:block;position:relative}
.sf-main--offset{padding-top:calc(var(--sf-header-h) + 12px)}
.sf-section{padding:88px 0;position:relative}
.sf-section--tight{padding:56px 0}
.sf-section--moss{background:linear-gradient(180deg,rgba(27,42,24,.85),rgba(10,13,18,0))}
.sf-section--amber{background:linear-gradient(180deg,rgba(42,26,16,.75),rgba(10,13,18,0))}
.sf-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.sf-grid--aside{grid-template-columns:repeat(12,1fr)}
@media (min-width:960px){
  .sf-grid--aside > .sf-grid__main{grid-column:1 / span 8}
  .sf-grid--aside > .sf-grid__side{grid-column:9 / span 4}
}
.sf-rule{
  height:1px;border:0;margin:0;
  background:linear-gradient(90deg,transparent,var(--sf-line) 18%,var(--sf-neon) 50%,var(--sf-line) 82%,transparent);
  opacity:.8;
}

/* ---------- 5. 按钮与胶囊 ---------- */
.sf-btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border:1px solid transparent;
  font-size:14.5px;font-weight:700;letter-spacing:.02em;line-height:1;
  color:var(--sf-white);background:transparent;cursor:pointer;text-decoration:none;
  clip-path:polygon(0 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%);
  transition:background-color .2s var(--sf-ease),color .2s var(--sf-ease),border-color .2s var(--sf-ease),transform .2s var(--sf-ease);
}
.sf-btn--neon{background:var(--sf-neon);color:var(--sf-ink)}
.sf-btn--neon:hover{background:#D8FF74;color:var(--sf-ink);transform:translateY(-2px)}
.sf-btn--ghost{border-color:var(--sf-line);color:var(--sf-text)}
.sf-btn--ghost:hover{border-color:var(--sf-neon);color:var(--sf-neon);transform:translateY(-2px)}
.sf-btn--ice{background:rgba(111,216,255,.12);border-color:rgba(111,216,255,.45);color:var(--sf-ice)}
.sf-btn--ice:hover{background:rgba(111,216,255,.2);color:var(--sf-white);transform:translateY(-2px)}
.sf-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 14px;border:1px solid var(--sf-line);background:rgba(20,26,34,.72);
  color:var(--sf-text);font-size:13.5px;font-weight:600;cursor:pointer;
  transition:border-color .2s var(--sf-ease),color .2s var(--sf-ease),background-color .2s var(--sf-ease);
}
.sf-chip:hover{border-color:var(--sf-ice);color:var(--sf-white)}
.sf-chip[aria-pressed="true"]{border-color:var(--sf-neon);color:var(--sf-neon);background:rgba(198,255,61,.1)}
.sf-chip__count{font-family:var(--sf-font-mono);font-size:12px;color:var(--sf-mist)}
.sf-chip[aria-pressed="true"] .sf-chip__count{color:var(--sf-neon)}
.sf-mark{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 12px;background:transparent;border:1px solid var(--sf-line);
  color:var(--sf-mist);font-size:12.5px;font-weight:700;cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% 62%,84% 100%,0 100%);
  transition:border-color .2s var(--sf-ease),color .2s var(--sf-ease),background-color .2s var(--sf-ease);
}
.sf-mark:hover{border-color:var(--sf-neon);color:var(--sf-white)}
.sf-mark.is-marked{background:var(--sf-neon);border-color:var(--sf-neon);color:var(--sf-ink)}
.sf-mark.is-pop{animation:sf-pop .35s var(--sf-ease)}
@keyframes sf-pop{0%{transform:scale(.86)}60%{transform:scale(1.08)}100%{transform:scale(1)}}
[data-watch-card][data-marked="true"]{
  border-color:var(--sf-neon);
  box-shadow:0 0 0 1px rgba(198,255,61,.32),0 18px 40px rgba(0,0,0,.45);
}
.sf-skip{
  position:absolute;left:16px;top:-64px;z-index:200;
  padding:10px 16px;background:var(--sf-neon);color:var(--sf-ink);
  font-weight:700;font-size:14px;text-decoration:none;transition:top .2s var(--sf-ease);
}
.sf-skip:focus{top:12px;color:var(--sf-ink)}

/* ---------- 6. 头部 ---------- */
.sf-header{
  position:fixed;left:0;right:0;top:0;z-index:90;
  transition:background-color .35s var(--sf-ease),box-shadow .35s var(--sf-ease);
}
.sf-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,13,18,.9),rgba(10,13,18,0));
  transition:opacity .3s var(--sf-ease);
}
.sf-header[data-scrolled="true"]{
  background:rgba(10,13,18,.96);
  box-shadow:0 1px 0 var(--sf-line),0 20px 44px rgba(0,0,0,.5);
  backdrop-filter:blur(10px);
}
.sf-header[data-scrolled="true"]::before{opacity:0}
.sf-header[data-open="true"]{background:var(--sf-ink);box-shadow:0 1px 0 var(--sf-line)}
.sf-header[data-open="true"]::before{opacity:0}
.sf-header__inner{
  position:relative;display:flex;align-items:center;gap:clamp(14px,2vw,26px);
  height:var(--sf-header-h);
  transition:height .3s var(--sf-ease);
}
.sf-header[data-scrolled="true"] .sf-header__inner{height:64px}

.sf-brand{display:flex;align-items:center;gap:11px;text-decoration:none;flex-shrink:0}
.sf-brand__mark{
  width:40px;height:40px;display:grid;place-items:center;
  font-family:var(--sf-font-mono);font-weight:700;font-size:15px;letter-spacing:.02em;
  color:var(--sf-ink);background:var(--sf-neon);
  clip-path:polygon(0 0,100% 0,100% 68%,70% 100%,0 100%);
}
.sf-brand__words{display:flex;flex-direction:column;line-height:1.15}
.sf-brand__name{font-family:var(--sf-font-display);font-weight:800;font-size:19px;letter-spacing:-.01em;color:var(--sf-white)}
.sf-brand__note{font-family:var(--sf-font-mono);font-size:10.5px;letter-spacing:.22em;color:var(--sf-mist)}
.sf-brand__tagline{
  margin:0;padding-left:16px;border-left:1px solid var(--sf-line);
  font-size:12.5px;letter-spacing:.06em;color:var(--sf-mist);white-space:nowrap;
}

.sf-nav{margin-left:auto}
.sf-nav__list{display:flex;align-items:center;gap:2px}
.sf-nav__link{
  position:relative;display:flex;align-items:center;gap:7px;
  padding:10px 13px;font-size:14.5px;font-weight:600;color:var(--sf-text);
  text-decoration:none;transition:color .2s var(--sf-ease),background-color .2s var(--sf-ease);
}
.sf-nav__idx{font-family:var(--sf-font-mono);font-size:10px;letter-spacing:.06em;color:var(--sf-mist);transition:color .2s var(--sf-ease)}
.sf-nav__link::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:2px;
  background:var(--sf-neon);transform:scaleX(0);transform-origin:left;
  transition:transform .25s var(--sf-ease);
}
.sf-nav__link:hover{color:var(--sf-white);background:rgba(111,216,255,.07)}
.sf-nav__link:hover .sf-nav__idx{color:var(--sf-ice)}
.sf-nav__link[aria-current="page"]{color:var(--sf-neon)}
.sf-nav__link[aria-current="page"] .sf-nav__idx{color:var(--sf-orange)}
.sf-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.sf-utility{display:flex;align-items:center;gap:14px;padding-left:18px;border-left:1px solid var(--sf-line)}
.sf-utility__link{
  font-size:13px;color:var(--sf-ice);text-decoration:none;
  border-bottom:1px dashed rgba(111,216,255,.45);padding-bottom:2px;
  transition:color .2s var(--sf-ease),border-color .2s var(--sf-ease);
}
.sf-utility__link:hover{color:var(--sf-white);border-bottom-color:var(--sf-white)}
.sf-utility__watch{
  display:flex;align-items:center;gap:8px;margin:0;padding:6px 11px;
  background:rgba(198,255,61,.08);border:1px solid rgba(198,255,61,.35);
  clip-path:polygon(0 0,100% 0,100% 64%,84% 100%,0 100%);
}
.sf-utility__watch-label{font-family:var(--sf-font-mono);font-size:11px;letter-spacing:.18em;color:var(--sf-neon)}
.sf-utility__count{
  font-family:var(--sf-font-mono);font-size:14px;font-weight:700;line-height:1;
  color:var(--sf-ink);background:var(--sf-neon);padding:4px 7px;min-width:24px;text-align:center;
}

.sf-nav-toggle{
  display:none;align-items:center;gap:9px;padding:10px 13px;
  background:transparent;border:1px solid var(--sf-line);color:var(--sf-text);
  font-size:13px;font-weight:700;cursor:pointer;
  clip-path:polygon(0 0,100% 0,100% 68%,82% 100%,0 100%);
  transition:border-color .2s var(--sf-ease),color .2s var(--sf-ease);
}
.sf-nav-toggle:hover{border-color:var(--sf-neon);color:var(--sf-neon)}
.sf-nav-toggle__bars{display:grid;gap:3px;width:16px}
.sf-nav-toggle__bars i{display:block;height:2px;background:var(--sf-neon);transition:transform .25s var(--sf-ease),opacity .2s var(--sf-ease)}
.sf-header[data-open="true"] .sf-nav-toggle__bars i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.sf-header[data-open="true"] .sf-nav-toggle__bars i:nth-child(2){opacity:0}
.sf-header[data-open="true"] .sf-nav-toggle__bars i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.sf-progress{position:absolute;left:0;right:0;bottom:0;height:2px;background:rgba(38,49,60,.55);pointer-events:none}
.sf-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--sf-ice),var(--sf-neon));transition:width .1s linear}

/* ---------- 7. 页脚 ---------- */
.sf-footer{
  position:relative;margin-top:96px;
  background:linear-gradient(180deg,#0C1117,#0A0D12);
  border-top:1px solid var(--sf-line);
}
.sf-footer::before{
  content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--sf-neon) 0 18%,var(--sf-orange) 18% 26%,rgba(38,49,60,.4) 26% 100%);
}
.sf-footer__top{
  display:grid;grid-template-columns:1.25fr 2fr;gap:44px;
  padding:64px 0 40px;
}
.sf-footer__brand{max-width:44ch}
.sf-footer__brand-line{
  font-family:var(--sf-font-editorial);font-weight:600;font-size:21px;
  color:var(--sf-white);margin:0 0 10px;letter-spacing:-.01em;
}
.sf-footer__region{font-size:14px;color:var(--sf-mist);margin:0 0 26px}
.sf-footer__nav{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.sf-footer__col-title{
  font-family:var(--sf-font-mono);font-size:11.5px;font-weight:500;
  letter-spacing:.2em;color:var(--sf-neon);margin:0 0 15px;
}
.sf-footer__list{display:grid;gap:10px}
.sf-footer__link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:14.5px;color:var(--sf-text);text-decoration:none;
  transition:color .2s var(--sf-ease);
}
.sf-footer__link::before{content:"";width:10px;height:1px;background:var(--sf-line);transition:width .2s var(--sf-ease),background-color .2s var(--sf-ease)}
.sf-footer__link:hover{color:var(--sf-neon)}
.sf-footer__link:hover::before{width:18px;background:var(--sf-neon)}

.sf-contact{display:grid;gap:11px;margin:0 0 18px}
.sf-contact__row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.sf-contact__label{
  font-family:var(--sf-font-mono);font-size:11px;letter-spacing:.14em;
  color:var(--sf-mist);text-transform:uppercase;min-width:56px;
}
.sf-contact__value{font-family:var(--sf-font-mono);font-size:13.5px;color:var(--sf-text);word-break:break-all}
.sf-copy{
  padding:4px 10px;background:transparent;border:1px solid var(--sf-line);
  color:var(--sf-ice);font-size:12px;font-weight:600;cursor:pointer;
  transition:border-color .2s var(--sf-ease),color .2s var(--sf-ease),background-color .2s var(--sf-ease);
}
.sf-copy:hover{border-color:var(--sf-ice);color:var(--sf-white)}
.sf-copy.is-done{background:var(--sf-neon);border-color:var(--sf-neon);color:var(--sf-ink)}
.sf-footer__note{font-size:12.5px;color:var(--sf-mist);margin:0 0 20px;max-width:46ch}
.sf-footer__cta-row{margin:0}

.sf-footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 26px;
  padding:20px 0 34px;margin-top:6px;border-top:1px solid var(--sf-line);
  font-size:12.5px;color:var(--sf-mist);
}
.sf-footer__copyright,.sf-footer__icp{margin:0}
.sf-footer__icp{font-family:var(--sf-font-mono);letter-spacing:.04em}
.sf-footer__legal-links{display:flex;flex-wrap:wrap;gap:20px;margin:0 0 0 auto}
.sf-footer__legal-link{color:var(--sf-mist);text-decoration:none;border-bottom:1px solid transparent;transition:color .2s var(--sf-ease),border-color .2s var(--sf-ease)}
.sf-footer__legal-link:hover{color:var(--sf-neon);border-bottom-color:var(--sf-neon)}

/* ---------- 8. 页面通用组件 ---------- */
.sf-panel{
  background:var(--sf-panel);border:1px solid var(--sf-line);
  padding:24px;position:relative;
}
.sf-cut{clip-path:polygon(0 0,100% 0,100% calc(100% - var(--sf-cut)),calc(100% - var(--sf-cut)) 100%,0 100%)}
.sf-cut--tr{clip-path:polygon(0 0,calc(100% - var(--sf-cut)) 0,100% var(--sf-cut),100% 100%,0 100%)}
.sf-card{
  background:var(--sf-panel);border:1px solid var(--sf-line);
  padding:22px;position:relative;
  transition:transform .2s var(--sf-ease),border-color .2s var(--sf-ease),box-shadow .2s var(--sf-ease);
}
.sf-card:hover{transform:translateY(-4px);border-color:var(--sf-neon);box-shadow:0 20px 44px rgba(0,0,0,.5)}
.sf-note{
  border-left:2px solid var(--sf-neon);
  background:linear-gradient(90deg,rgba(198,255,61,.07),rgba(198,255,61,0) 70%);
  padding:14px 18px;font-size:14.5px;color:var(--sf-text);
}
.sf-tag{
  display:inline-block;padding:3px 9px;font-family:var(--sf-font-mono);
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--sf-ice);background:var(--sf-ice-deep);
}
.sf-tag--neon{color:var(--sf-ink);background:var(--sf-neon)}
.sf-tag--orange{color:var(--sf-ink);background:var(--sf-orange)}
.sf-badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 13px;
  background:rgba(255,122,47,.12);border:1px solid rgba(255,122,47,.45);
  color:var(--sf-orange);font-family:var(--sf-font-mono);font-size:12px;letter-spacing:.06em;
}
.sf-stat{display:grid;gap:6px}
.sf-stat__value{
  font-family:var(--sf-font-mono);font-weight:700;line-height:1;
  font-size:clamp(26px,3.6vw,40px);color:var(--sf-neon);letter-spacing:-.01em;
}
.sf-stat__label{font-family:var(--sf-font-mono);font-size:12px;letter-spacing:.14em;color:var(--sf-mist)}
.sf-bar{position:relative;height:8px;background:rgba(38,49,60,.9);overflow:hidden}
.sf-bar__fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--sf-ice),var(--sf-neon));transition:width .6s var(--sf-ease)}
.sf-bar.is-in .sf-bar__fill{width:var(--fill,50%)}
.sf-media{
  position:relative;overflow:hidden;background:var(--sf-panel);
  clip-path:polygon(0 0,100% 0,100% calc(100% - var(--sf-cut)),calc(100% - var(--sf-cut)) 100%,0 100%);
}
.sf-media img,.sf-media video{display:block;width:100%;height:100%;object-fit:cover}
.sf-media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(10,13,18,.16),rgba(10,13,18,.06) 45%,rgba(10,13,18,.8));
}
.sf-media--16x9{aspect-ratio:16/9}
.sf-media--4x3{aspect-ratio:4/3}
.sf-media--1x1{aspect-ratio:1/1}
.sf-media--tall{aspect-ratio:3/4}
.sf-media__tag{
  position:absolute;left:14px;bottom:12px;z-index:2;
  font-family:var(--sf-font-mono);font-size:11.5px;letter-spacing:.1em;
  color:var(--sf-ink);background:var(--sf-neon);padding:4px 9px;
}
.sf-toc{position:sticky;top:calc(var(--sf-header-h) + 26px);border-left:1px solid var(--sf-line);padding-left:16px}
.sf-toc__link{
  display:block;padding:6px 0;font-size:13.5px;color:var(--sf-mist);
  text-decoration:none;transition:color .2s var(--sf-ease),padding-left .2s var(--sf-ease);
}
.sf-toc__link:hover{color:var(--sf-text);padding-left:4px}
.sf-toc__link[aria-current="true"]{color:var(--sf-neon)}
.sf-crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--sf-mist);margin-bottom:18px}
.sf-crumbs a{color:var(--sf-mist);text-decoration:none}
.sf-crumbs a:hover{color:var(--sf-neon)}
.sf-crumbs__sep{color:var(--sf-line)}
.sf-crumbs [aria-current="page"]{color:var(--sf-text)}
.sf-reveal{transition:opacity .55s var(--sf-ease),transform .55s var(--sf-ease)}
.sf-js .sf-reveal{opacity:0;transform:translateY(16px)}
.sf-js .sf-reveal.is-in{opacity:1;transform:none}

/* ---------- 9. 响应式 ---------- */
@media (max-width:1180px){
  .sf-brand__tagline{display:none}
  .sf-footer__top{grid-template-columns:1fr;gap:38px}
  .sf-footer__brand{max-width:none}
}
@media (max-width:1024px){
  .sf-nav__idx{display:none}
  .sf-nav__link{padding:10px 11px;font-size:14px}
}
@media (max-width:960px){
  :root{--sf-header-h:64px;--sf-cut:12px}
  .sf-header[data-scrolled="true"] .sf-header__inner{height:var(--sf-header-h)}
  .sf-nav-toggle{display:inline-flex;order:2}
  .sf-utility{order:1;margin-left:auto;border-left:0;padding-left:0}
  .sf-brand__mark{width:36px;height:36px;font-size:14px}
  .sf-nav{
    position:fixed;left:0;right:0;top:var(--sf-header-h);margin:0;
    background:var(--sf-ink);border-top:1px solid var(--sf-line);border-bottom:1px solid var(--sf-line);
    padding:16px 0 20px;box-shadow:0 26px 54px rgba(0,0,0,.62);
    max-height:calc(100vh - var(--sf-header-h));overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-12px);
    transition:opacity .24s var(--sf-ease),transform .24s var(--sf-ease),visibility .24s var(--sf-ease);
  }
  .sf-header[data-open="true"] .sf-nav{opacity:1;visibility:visible;transform:none}
  .sf-nav__list{
    flex-wrap:nowrap;gap:8px;overflow-x:auto;padding:2px 20px 8px;
    scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;
  }
  .sf-nav__list::-webkit-scrollbar{height:4px}
  .sf-nav__list::-webkit-scrollbar-thumb{background:var(--sf-line)}
  .sf-nav__link{
    white-space:nowrap;border:1px solid var(--sf-line);padding:10px 16px;
    font-size:14px;scroll-snap-align:center;background:rgba(20,26,34,.6);
  }
  .sf-nav__link[aria-current="page"]{border-color:var(--sf-neon);background:rgba(198,255,61,.1)}
  .sf-nav__link::after{display:none}
  .sf-nav__idx{display:inline;font-size:9.5px}
  .sf-section{padding:64px 0}
  .sf-section--tight{padding:44px 0}
  .sf-footer{margin-top:72px}
  .sf-footer__nav{grid-template-columns:repeat(2,1fr);gap:26px}
  .sf-footer__legal-links{margin-left:0;width:100%}
}
@media (max-width:640px){
  body{font-size:16px}
  .sf-shell{width:min(100% - 28px,var(--sf-shell))}
  .sf-brand__name{font-size:17px}
  .sf-brand__note{font-size:9.5px;letter-spacing:.16em}
  .sf-utility__link{display:none}
  .sf-nav-toggle__label{display:none}
  .sf-footer__top{padding:48px 0 28px}
  .sf-footer__nav{grid-template-columns:1fr;gap:24px}
  .sf-contact__label{min-width:48px}
  .sf-panel,.sf-card{padding:18px}
  .sf-toc{position:static;border-left:0;border-top:1px solid var(--sf-line);padding:14px 0 0}
  .sf-toc__link{display:inline-block;padding:4px 10px;border:1px solid var(--sf-line);margin:0 6px 6px 0}
}

/* ---------- 10. 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;
  }
  .sf-js .sf-reveal{opacity:1;transform:none}
  .sf-card:hover,.sf-btn:hover{transform:none}
  .sf-progress__bar{transition:none}
}