/* =========================================================
   江南赛场 / site.css —— 共享外壳与通用组件
   深墨蓝底 + 水色青碧 + 赛场橙红 / 直角 / 1px 细线 / 精密网格
   ========================================================= */

/* ---------- 00. 设计令牌 ---------- */
:root{
  --ink-900:#071A2B;
  --ink-800:#0E2A40;
  --ink-700:#123350;
  --teal:#19C3B1;
  --teal-soft:#7FE3D6;
  --ember:#FF5A36;
  --ember-soft:#FFB09C;
  --glow:#5CF2E6;
  --paper:#F4F7F5;
  --graphite:#1D2A33;
  --mist:#8FA3AD;
  --text:#D8E6E4;

  --line:rgba(127,227,214,.16);
  --line-strong:rgba(127,227,214,.34);
  --line-ember:rgba(255,90,54,.42);

  --rail-w:88px;
  --bar-h:60px;
  --max-w:1440px;
  --gutter:24px;
  --pad-x:clamp(20px,3.6vw,64px);

  --f-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono","JetBrains Mono","SFMono-Regular",Menlo,Consolas,ui-monospace,monospace;
}

/* ---------- 01. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body,
h1,h2,h3,h4,h5,p,figure,blockquote,ul,ol{margin:0;}
ul,ol{padding:0;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%;}
:focus-visible{outline:2px solid var(--glow);outline-offset:3px;}

/* ---------- 02. 中文排版与页面底色 ---------- */
body{
  font-family:var(--f-body);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  color:var(--text);
  background-color:var(--ink-900);
  background-image:
    linear-gradient(180deg,rgba(14,42,64,.55) 0%,rgba(7,26,43,0) 46%),
    radial-gradient(120% 62% at 100% 0%,rgba(25,195,177,.11) 0%,rgba(7,26,43,0) 62%),
    radial-gradient(80% 50% at 0% 100%,rgba(255,90,54,.08) 0%,rgba(7,26,43,0) 70%);
  padding-left:var(--rail-w);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{font-weight:900;line-height:1.16;color:var(--paper);letter-spacing:-.01em;}
h1{font-size:clamp(38px,5.6vw,78px);line-height:1.04;letter-spacing:-.03em;}
h2{font-size:clamp(27px,3.3vw,44px);}
h3{font-size:clamp(19px,1.9vw,26px);}
h4{font-size:17px;letter-spacing:.02em;}
p{max-width:72ch;}
::selection{background:var(--teal);color:#04161F;}

/* ---------- 03. 通用排版类 ---------- */
.display{
  font-family:var(--f-display);
  font-size:clamp(40px,7.4vw,96px);
  font-weight:900;
  line-height:.96;
  letter-spacing:-.035em;
  color:var(--paper);
}
.slant{display:inline-block;transform:skewX(-7deg);transform-origin:left bottom;}
.slant--right{transform-origin:right bottom;}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--teal-soft);
}
.eyebrow::before{content:"";display:block;width:22px;height:1px;background:var(--teal);}
.lede{
  font-size:clamp(16px,1.35vw,19px);
  line-height:1.8;
  color:rgba(216,230,228,.86);
  max-width:62ch;
}
.prose{max-width:720px;}
.prose p{margin-block:0 1.1em;}
.prose h2,.prose h3{margin-block:2em .6em;}
.prose ul{list-style:none;padding-left:0;}
.prose li{position:relative;padding-left:22px;margin-block:.4em;}
.prose li::before{content:"";position:absolute;left:0;top:.75em;width:10px;height:1px;background:var(--teal);}
.prose strong{color:var(--paper);font-weight:700;}

/* ---------- 04. 布局容器与网格 ---------- */
.container{
  width:100%;
  max-width:var(--max-w);
  margin-inline:auto;
  padding-inline:var(--pad-x);
}
.grid{display:grid;gap:var(--gutter);}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr));}
.span-2{grid-column:span 2;}
.span-3{grid-column:span 3;}
.span-4{grid-column:span 4;}
.span-5{grid-column:span 5;}
.span-6{grid-column:span 6;}
.span-7{grid-column:span 7;}
.span-8{grid-column:span 8;}
.span-9{grid-column:span 9;}
.span-10{grid-column:span 10;}
.span-12{grid-column:span 12;}
.span-full{grid-column:1 / -1;}

.section{padding-block:clamp(48px,7vw,104px);position:relative;}
.section + .section{border-top:1px solid var(--line);}
.section--paper{background:var(--paper);color:#2A3942;border-top:1px solid rgba(29,42,51,.12);}
.section--paper :is(h1,h2,h3,h4,h5){color:var(--graphite);}
.section--paper .lede{color:#41535D;}
.section--paper .eyebrow{color:#0F8477;}
.section--paper .eyebrow::before{background:#0F8477;}

.section-head{display:flex;flex-direction:column;gap:14px;margin-bottom:clamp(24px,3vw,44px);}
.section-head__index{
  font-family:var(--f-mono);
  font-size:clamp(52px,9vw,132px);
  font-weight:200;
  line-height:.8;
  letter-spacing:-.04em;
  color:rgba(127,227,214,.18);
}
.section--paper .section-head__index{color:rgba(29,42,51,.14);}
.section-head__title{font-size:clamp(26px,3.4vw,46px);line-height:1.1;}
.section-head__lead{max-width:58ch;color:rgba(216,230,228,.8);font-size:16px;}
.section--paper .section-head__lead{color:#41535D;}

.divider{height:1px;border:0;background:var(--line);margin:0;}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;}

/* ---------- 05. 按钮与标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  border:1px solid var(--line-strong);
  font-size:14px;font-weight:700;letter-spacing:.06em;line-height:1.2;
  color:var(--paper);
  transition:transform .2s ease,background-color .2s ease,border-color .2s ease,color .2s ease,filter .2s ease;
}
.btn:hover{transform:translateY(-2px);border-color:var(--teal);color:var(--teal-soft);}
.btn--primary{
  border-color:transparent;
  color:#0A1A20;
  background-image:linear-gradient(118deg,var(--ember) 0%,#FF8A5E 100%);
  box-shadow:0 0 0 1px rgba(255,176,156,.35), 0 12px 28px -18px rgba(255,90,54,.9);
}
.btn--primary:hover{color:#0A1A20;filter:brightness(1.07);border-color:transparent;}
.btn--line{background-color:transparent;}
.btn--line:hover{background-color:rgba(25,195,177,.1);}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  border:1px solid var(--line-strong);
  font-family:var(--f-mono);font-size:11px;letter-spacing:.14em;
  color:var(--teal-soft);
  white-space:nowrap;
}
.tag--ember{color:var(--ember-soft);border-color:var(--line-ember);}
.tag--solid{background-color:var(--teal);border-color:transparent;color:#04161F;font-weight:700;}

/* ---------- 06. 面板与 Bento ---------- */
.panel{
  position:relative;
  background-color:var(--ink-800);
  border:1px solid var(--line);
  padding:clamp(16px,2vw,28px);
}
.panel--flush{padding:0;}
.panel__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:12px;margin-bottom:18px;
  border-bottom:1px solid var(--line);
}
.panel__title{font-size:15px;font-weight:700;letter-spacing:.12em;color:var(--paper);}

.bento{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:var(--gutter);
}
.bento__cell{
  position:relative;
  display:flex;flex-direction:column;gap:12px;
  min-height:120px;
  padding:clamp(16px,1.8vw,26px);
  background-color:var(--ink-800);
  border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.bento__cell:hover{border-color:var(--line-strong);}
.bento__cell--focus{
  background-image:
    linear-gradient(152deg,rgba(25,195,177,.18) 0%,rgba(255,90,54,.16) 68%,rgba(14,42,64,0) 100%);
  border-color:var(--line-strong);
  box-shadow:0 24px 60px -40px rgba(25,195,177,.8);
}
.bento__cell--accent{border-color:var(--line-ember);}

/* ---------- 07. 图片容器（页面阶段放置占位） ---------- */
.media{
  position:relative;
  overflow:hidden;
  border:1px solid var(--line);
  background-color:var(--ink-800);
}
.media__img{width:100%;height:100%;object-fit:cover;}
.media--wide{aspect-ratio:16 / 9;}
.media--tall{aspect-ratio:3 / 4;}
.media--square{aspect-ratio:1 / 1;}
.media--panel{aspect-ratio:4 / 3;}
.media__caption{
  position:absolute;left:0;right:0;bottom:0;
  padding:10px 12px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;line-height:1.5;
  color:var(--paper);
  background-image:linear-gradient(180deg,rgba(4,14,22,0) 0%,rgba(4,14,22,.84) 100%);
}
.media--weave::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(92,242,230,.16) 0 1px,rgba(92,242,230,0) 1px 14px);
  mix-blend-mode:screen;
}

/* ---------- 08. 面包屑 ---------- */
.breadcrumbs{padding-block:18px 0;}
.breadcrumbs__list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--f-mono);font-size:11px;letter-spacing:.12em;
  color:var(--mist);
}
.breadcrumbs__list > li{display:inline-flex;align-items:center;gap:8px;}
.breadcrumbs__list > li + li::before{content:"/";color:rgba(143,163,173,.55);}
.breadcrumbs__link{color:var(--mist);border-bottom:1px solid transparent;transition:color .2s,border-color .2s;}
.breadcrumbs__link:hover{color:var(--teal-soft);border-bottom-color:var(--teal);}
.breadcrumbs__current{color:var(--teal-soft);}

/* ---------- 09. 跳转链接 ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  padding:10px 16px;
  background-color:var(--teal);color:#04161F;
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0);}

/* ---------- 10. 滚动进度 ---------- */
.scroll-progress{
  position:fixed;z-index:120;pointer-events:none;
  background-image:linear-gradient(180deg,var(--teal) 0%,var(--glow) 55%,var(--ember) 100%);
}

/* ---------- 11. 头部：侧边轨道 ---------- */
.site-header{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  width:var(--rail-w);
  z-index:60;
  background-color:rgba(7,26,43,.94);
  border-inline-end:1px solid var(--line);
}
.site-header::after{
  content:"";position:absolute;inset-block:0;inset-inline-end:-1px;width:1px;
  background-image:linear-gradient(180deg,rgba(25,195,177,0) 0%,rgba(25,195,177,.75) 45%,rgba(255,90,54,.6) 100%);
  opacity:.55;
}
.rail{
  display:flex;flex-direction:column;align-items:center;
  height:100%;min-height:0;
  padding:18px 0 14px;
  gap:16px;
}
.rail__brand{flex:0 0 auto;}

.brand{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  color:var(--paper);
}
.brand__mark{
  display:grid;place-items:center;
  width:44px;height:44px;
  background-color:rgba(25,195,177,.1);
  border:1px solid var(--teal);
  color:var(--teal-soft);
  font-family:var(--f-mono);font-size:14px;font-weight:700;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  transition:background-color .25s ease,color .25s ease;
}
.brand:hover .brand__mark{background-color:var(--teal);color:#04161F;}
.brand__name{
  writing-mode:vertical-rl;
  font-size:12px;font-weight:700;letter-spacing:.34em;
  color:rgba(244,247,245,.9);
}

/* 抽屉遮罩：桌面隐藏 */
.nav-scrim{display:none;}

/* 移动导航按钮：桌面隐藏 */
.nav-toggle{display:none;}

/* 主导航 */
.site-nav{
  flex:1 1 auto;
  min-height:0;
  width:100%;
  display:flex;flex-direction:column;justify-content:center;
  overflow-y:auto;
  scrollbar-width:none;
}
.site-nav::-webkit-scrollbar{width:0;height:0;}
.site-nav__list{display:flex;flex-direction:column;align-items:center;gap:2px;width:100%;}
.site-nav__item{display:flex;justify-content:center;width:100%;}
.site-nav__link{
  display:flex;flex-direction:column;align-items:center;gap:6px;
  width:58px;
  padding-block:9px;
  border:1px solid transparent;
  color:var(--mist);
  transition:color .2s ease,background-color .2s ease,border-color .2s ease;
}
.site-nav__link:hover{color:var(--teal-soft);background-color:rgba(25,195,177,.1);border-color:var(--line);}
.site-nav__idx{
  font-family:var(--f-mono);font-size:9px;letter-spacing:.1em;
  color:rgba(143,163,173,.75);
}
.site-nav__text{
  writing-mode:vertical-rl;
  font-size:13px;letter-spacing:.24em;line-height:1;
}
.site-nav__link[aria-current="page"]{
  background-image:linear-gradient(180deg,var(--teal) 0%,#12A597 100%);
  border-color:transparent;
  color:#04161F;
}
.site-nav__link[aria-current="page"] .site-nav__idx{color:rgba(4,22,31,.66);}
.site-nav__link[aria-current="page"]:hover{color:#04161F;background-image:linear-gradient(180deg,var(--teal-soft) 0%,var(--teal) 100%);}
.site-nav__link:focus-visible{outline-offset:-3px;}

/* 抽屉底部（仅移动端出现） */
.site-nav__foot{display:none;}

/* 轨道底部工具与 CTA */
.rail__util{
  display:flex;flex-direction:column;align-items:center;gap:10px;
  width:68px;padding-block:12px 8px;
  border-top:1px solid var(--line);
}
.rail__util-item{
  writing-mode:vertical-rl;
  font-family:var(--f-mono);font-size:9px;letter-spacing:.2em;
  color:rgba(143,163,173,.85);
}
.rail__cta{
  display:flex;align-items:center;justify-content:center;
  width:44px;padding-block:14px;
  writing-mode:vertical-rl;
  font-size:12px;font-weight:700;letter-spacing:.26em;line-height:1.2;
  color:#0A1A20;
  background-image:linear-gradient(180deg,var(--ember) 0%,#FF8A5E 100%);
  border:1px solid rgba(255,176,156,.5);
  transition:transform .2s ease,filter .2s ease;
}
.rail__cta:hover{transform:translateY(-2px);filter:brightness(1.07);}

/* 滚动进度：桌面为竖线 */
.scroll-progress{
  top:0;left:0;width:3px;height:100vh;
  transform:scaleY(var(--p,0));
  transform-origin:top center;
}

/* 矮屏收敛 */
@media (max-height:820px){
  .rail__util{display:none;}
}
@media (max-height:700px){
  .site-nav__idx{display:none;}
  .rail__cta{padding-block:10px;}
}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  background-color:var(--ink-800);
  border-top:1px solid var(--line);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background-image:linear-gradient(90deg,var(--teal) 0%,var(--glow) 26%,rgba(92,242,230,0) 58%,var(--ember) 100%);
  opacity:.85;
}
.site-footer::after{
  content:"";position:absolute;right:-120px;bottom:-160px;width:420px;height:320px;
  background-image:repeating-linear-gradient(115deg,rgba(92,242,230,.14) 0 1px,rgba(92,242,230,0) 1px 16px);
  transform:skewY(-6deg);
  pointer-events:none;
}
.footer__inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--max-w);margin-inline:auto;
  padding:clamp(40px,5vw,72px) var(--pad-x) 24px;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.5fr .8fr .9fr 1.1fr;
  gap:clamp(20px,2.4vw,40px);
  padding-bottom:clamp(28px,3.4vw,48px);
}
.footer__brand{display:flex;flex-direction:column;gap:14px;}
.footer__lockup{display:inline-flex;align-items:center;gap:12px;color:var(--paper);}
.footer__mark{
  display:grid;place-items:center;
  width:38px;height:38px;
  border:1px solid var(--teal);
  background-color:rgba(25,195,177,.1);
  color:var(--teal-soft);
  font-family:var(--f-mono);font-size:12px;font-weight:700;letter-spacing:.06em;
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.footer__name{font-size:17px;font-weight:900;letter-spacing:.16em;}
.footer__desc{font-size:14px;line-height:1.8;color:rgba(216,230,228,.74);max-width:34ch;}
.footer__tagline{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.18em;
  color:var(--teal-soft);
}
.footer__col,.footer__contact{display:flex;flex-direction:column;gap:14px;min-width:0;}
.footer__col-title{
  font-size:11px;font-weight:700;letter-spacing:.26em;
  color:var(--paper);
  padding-bottom:10px;
  border-bottom:1px solid var(--line);
}
.footer__list{display:flex;flex-direction:column;gap:9px;}
.footer__link{
  display:inline-block;
  font-size:14px;color:rgba(216,230,228,.78);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.footer__link:hover{color:var(--teal-soft);border-bottom-color:var(--teal);transform:translateX(2px);}
.footer__contact-row{display:flex;flex-direction:column;gap:2px;font-size:14px;}
.footer__contact-key{
  font-family:var(--f-mono);font-size:10px;letter-spacing:.2em;
  color:var(--mist);
}
.footer__contact-val{color:rgba(216,230,228,.9);word-break:break-all;font-family:var(--f-mono);font-size:13px;line-height:1.6;}
.footer__legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-top:20px;
  border-top:1px solid var(--line);
}
.footer__copyright{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;
  color:var(--mist);
}
.footer__meta-links{display:flex;flex-wrap:wrap;gap:18px;}
.footer__meta-links a{
  font-family:var(--f-mono);font-size:11px;letter-spacing:.1em;
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer__meta-links a:hover{color:var(--teal-soft);border-bottom-color:var(--teal);}

/* ---------- 13. 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .62s cubic-bezier(.22,.7,.2,1),transform .62s cubic-bezier(.22,.7,.2,1);
  will-change:opacity,transform;
}
[data-reveal].is-visible{opacity:1;transform:none;}
[data-reveal-delay="1"]{transition-delay:.08s;}
[data-reveal-delay="2"]{transition-delay:.16s;}
[data-reveal-delay="3"]{transition-delay:.24s;}
[data-reveal-delay="4"]{transition-delay:.32s;}

/* ---------- 14. 平板（≤1080px） ---------- */
@media (max-width:1080px){
  :root{--rail-w:76px;--gutter:18px;}
  .footer__grid{grid-template-columns:1fr 1fr;}
  .footer__brand{grid-column:1 / -1;}
  .span-2,.span-3{grid-column:span 6;}
  .span-4,.span-5{grid-column:span 6;}
  .span-7,.span-8{grid-column:span 12;}
  .span-9,.span-10{grid-column:span 12;}
}

/* ---------- 15. 移动端（≤899px） ---------- */
@media (max-width:899px){
  body{padding-left:0;padding-top:var(--bar-h);}
  body.is-nav-open{overflow:hidden;}

  .site-header{
    inset:0 0 auto 0;
    width:100%;
    height:var(--bar-h);
    border-inline-end:0;
    border-bottom:1px solid var(--line);
    background-color:rgba(7,26,43,.96);
    backdrop-filter:blur(10px);
  }
  .site-header::after{display:none;}

  .rail{
    position:relative;z-index:3;
    flex-direction:row;align-items:center;justify-content:space-between;
    height:var(--bar-h);
    padding:0 14px;
    gap:12px;
  }
  .brand{flex-direction:row;gap:10px;}
  .brand__mark{width:36px;height:36px;font-size:12px;}
  .brand__name{writing-mode:horizontal-tb;font-size:13px;letter-spacing:.24em;}

  /* 汉堡 */
  .nav-toggle{
    display:inline-flex;align-items:center;gap:10px;
    padding:8px 4px;
    color:var(--paper);
    border:1px solid var(--line);
  }
  .nav-toggle__box{position:relative;display:block;width:20px;height:12px;}
  .nav-toggle__bar{
    position:absolute;left:0;width:20px;height:1.5px;
    background-color:currentColor;
    transition:transform .28s ease,opacity .2s ease;
  }
  .nav-toggle__bar:nth-child(1){top:0;}
  .nav-toggle__bar:nth-child(2){top:10px;transform:scaleX(.7);transform-origin:left center;}
  .nav-toggle__label{font-family:var(--f-mono);font-size:10px;letter-spacing:.2em;}
  .site-header[data-open="true"] .nav-toggle{border-color:var(--teal);color:var(--teal-soft);}
  .site-header[data-open="true"] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg);}
  .site-header[data-open="true"] .nav-toggle__bar:nth-child(2){transform:translateY(-5px) rotate(-45deg) scaleX(1);}

  /* 遮罩 */
  .nav-scrim{
    display:block;
    position:fixed;inset:0;
    background-color:rgba(3,11,18,.74);
    opacity:0;pointer-events:none;
    transition:opacity .3s ease;
    z-index:1;
  }
  .site-header[data-open="true"] .nav-scrim{opacity:1;pointer-events:auto;}

  /* 抽屉 */
  .site-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:min(86vw,360px);
    height:100vh;
    padding:78px 20px 28px;
    justify-content:flex-start;
    background-color:var(--ink-800);
    border-right:1px solid var(--line-strong);
    box-shadow:28px 0 64px rgba(3,10,16,.55);
    transform:translateX(-104%);
    transition:transform .34s cubic-bezier(.22,.7,.2,1);
    overflow-y:auto;
    z-index:2;
  }
  .site-header[data-open="true"] .site-nav{transform:translateX(0);}

  .site-nav__list{align-items:stretch;gap:0;}
  .site-nav__item{justify-content:flex-start;}
  .site-nav__link{
    flex-direction:row;justify-content:flex-start;align-items:center;gap:14px;
    width:100%;padding:14px 10px;
    border:0;border-bottom:1px solid var(--line);
  }
  .site-nav__idx{font-size:11px;width:22px;color:var(--mist);}
  .site-nav__text{writing-mode:horizontal-tb;font-size:16px;letter-spacing:.14em;}
  .site-nav__link[aria-current="page"]{
    background-image:linear-gradient(90deg,rgba(25,195,177,.95) 0%,rgba(25,195,177,.12) 100%);
    color:#04161F;
  }
  .site-nav__link[aria-current="page"] .site-nav__idx{color:rgba(4,22,31,.7);}

  .site-nav__foot{
    display:flex;flex-direction:column;gap:12px;
    margin-top:22px;padding-top:18px;
    border-top:1px solid var(--line-strong);
  }
  .site-nav__tagline{
    font-family:var(--f-mono);font-size:11px;letter-spacing:.16em;
    color:var(--teal-soft);
  }
  .site-nav__cta{width:100%;}
  .site-nav__util{
    font-family:var(--f-mono);font-size:10px;letter-spacing:.18em;
    color:rgba(143,163,173,.9);
  }

  .rail__util,.rail__cta{display:none;}

  /* 进度条改为底部光带 */
  .scroll-progress{
    top:auto;bottom:0;left:0;
    width:100%;height:3px;
    transform:scaleX(var(--p,0));
    transform-origin:left center;
    background-image:linear-gradient(90deg,var(--teal) 0%,var(--glow) 55%,var(--ember) 100%);
  }

  /* 网格单列化 */
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr));}
  .span-2,.span-3,.span-4,.span-5,.span-6{grid-column:span 6;}
  .span-7,.span-8,.span-9,.span-10,.span-12{grid-column:span 6;}
  .bento{grid-template-columns:repeat(6,minmax(0,1fr));}
  .bento__cell{grid-column:span 6;}

  .footer__grid{grid-template-columns:1fr;}
  .footer__brand{grid-column:auto;}
  .footer__legal{flex-direction:column;align-items:flex-start;gap:10px;}
  .footer__meta-links{gap:14px;}
}

/* ---------- 16. 无障碍降级 ---------- */
@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;transform:none;transition:none;}
  .scroll-progress{transform:none;opacity:.9;}
  .scroll-progress{transform:scale3d(1,1,1);}
}