/* =========================================================
   奥迪棋牌 · 共享外壳样式 /assets/site.css
   暗夜赛博棋牌夜场 × 复古出版色体系
   ========================================================= */

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

/* ---------- 2. 变量 ---------- */
:root{
  --ink:#0B0A0F;
  --ink-2:#17131C;
  --ink-3:#221B2B;
  --cream:#F3E7D3;
  --paper:#E4D6BC;
  --red:#E10600;
  --orange:#FF3D2E;
  --red-text:#FF6B5E;
  --blue:#4A6BFF;
  --violet:#8A5CFF;
  --cyan:#38E8C8;
  --muted:#9AA0AE;
  --line:rgba(243,231,211,.14);
  --line-strong:rgba(243,231,211,.3);
  --glass:rgba(23,19,28,.6);
  --grad-neon:linear-gradient(120deg,var(--blue),var(--violet));
  --grad-hot:linear-gradient(120deg,var(--red),var(--orange));
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular","Roboto Mono",Consolas,monospace;
  --maxw:1320px;
  --gutter:64px;
  --r:14px;
  --r-lg:22px;
  --sp1:8px;--sp2:16px;--sp3:24px;--sp4:40px;--sp5:72px;--sp6:120px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --dur:.5s;
}

/* ---------- 3. 基础排版 ---------- */
body{
  min-height:100vh;
  background:
    radial-gradient(900px 620px at 10% -12%,rgba(74,107,255,.18),transparent 62%),
    radial-gradient(720px 540px at 94% 4%,rgba(138,92,255,.16),transparent 58%),
    radial-gradient(680px 520px at 50% 112%,rgba(225,6,0,.14),transparent 60%),
    var(--ink);
  background-attachment:fixed;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  font-weight:400;
  letter-spacing:.01em;
  overflow-wrap:break-word;
}
h1,h2,h3,h4,h5{font-family:var(--font-sans);font-weight:900;line-height:1.22;letter-spacing:.01em;color:var(--cream)}
h1{font-size:clamp(28px,4vw,40px)}
h2{font-size:clamp(24px,3vw,28px)}
h3{font-size:22px}
h4{font-size:17px}
p{max-width:34em}
strong,b{font-weight:700;color:var(--cream)}
small{font-size:13px}

.display{
  font-family:var(--font-serif);
  font-weight:900;
  font-size:clamp(40px,7vw,96px);
  line-height:1.04;
  letter-spacing:.02em;
  color:var(--cream);
}
.display--grad{
  background-image:linear-gradient(100deg,var(--cream) 0%,#FFFFFF 26%,var(--blue) 66%,var(--violet) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 6px rgba(74,107,255,.5));
}
.display--outline{
  color:transparent;
  -webkit-text-stroke:1px var(--red);
  text-shadow:0 0 18px rgba(225,6,0,.35);
}
.lede{font-size:19px;line-height:1.8;color:var(--paper);max-width:60ch}
.muted{color:var(--muted)}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;letter-spacing:.02em}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
::selection{background:rgba(225,6,0,.45);color:#fff}

/* ---------- 4. 焦点 ---------- */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
a:focus-visible,button:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 5. 跳过链接 ---------- */
.skip-link{
  position:fixed;left:24px;top:-72px;z-index:200;
  padding:12px 20px;border-radius:0 0 12px 12px;
  background:var(--grad-hot);color:#fff;font-weight:700;font-size:15px;
  transition:top .25s var(--ease);
}
.skip-link:focus{top:0}

/* ---------- 6. 页头：居中刊头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(11,10,15,.84);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease);
}
.site-header[data-shrunk]{background:rgba(11,10,15,.96)}
.masthead{
  position:relative;
  width:100%;max-width:var(--maxw);margin:0 auto;
  padding:20px var(--gutter) 0;
  display:grid;
  grid-template-columns:1fr auto 1fr;
  grid-template-areas:
    "meta brand actions"
    "nav nav nav";
  gap:10px var(--sp3);
  align-items:center;
  transition:padding .3s var(--ease);
}
.site-header[data-shrunk] .masthead{padding-top:10px}
.masthead__meta{grid-area:meta;display:flex;align-items:center;gap:12px;min-width:0}
.masthead__brand{grid-area:brand;text-align:center;min-width:0}
.masthead__actions{grid-area:actions;display:flex;align-items:center;justify-content:flex-end;gap:12px}

.brand{display:inline-flex;flex-direction:column;align-items:center;gap:4px}
.brand__mark{
  font-family:var(--font-serif);font-weight:900;font-size:40px;line-height:1;letter-spacing:.08em;
  background-image:linear-gradient(100deg,var(--cream) 0%,#FFFFFF 28%,var(--blue) 68%,var(--violet) 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  -webkit-text-stroke:.8px rgba(225,6,0,.42);
  filter:drop-shadow(0 0 8px rgba(74,107,255,.55));
  transition:font-size .3s var(--ease),filter .3s var(--ease);
}
.brand:hover .brand__mark{filter:drop-shadow(0 0 14px rgba(255,61,46,.7))}
.brand__tag{
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.22em;
  color:var(--muted);text-transform:uppercase;
}
.site-header[data-shrunk] .brand__mark{font-size:28px}
.site-header[data-shrunk] .brand__tag{display:none}
.site-header[data-shrunk] .masthead__meta{display:none}

.issue-badge{
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.08em;
  padding:5px 12px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(243,231,211,.05);color:var(--paper);
  white-space:nowrap;
}
.status-pill{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 10px rgba(56,232,200,.9);
  animation:pulse-dot 2.4s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.45;transform:scale(.72)}
}

/* 导航 */
.masthead__nav{
  grid-area:nav;
  border-top:1px solid var(--line);
  padding:10px 0 14px;
  transition:padding .3s var(--ease);
}
.site-header[data-shrunk] .masthead__nav{padding:6px 0 8px}
.nav-list{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:4px 6px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;
  padding:9px 18px;border-radius:999px;
  font-size:15px;font-weight:500;color:var(--paper);
  transition:color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:18px;right:18px;bottom:4px;height:2px;
  background:linear-gradient(90deg,var(--red),var(--violet));
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.nav-link:hover{color:#fff;background:rgba(243,231,211,.07)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:#fff;background:rgba(225,6,0,.18);
  box-shadow:inset 0 0 0 1px rgba(255,61,46,.45);
}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}
.site-header[data-shrunk] .masthead__nav:has(.nav-link[aria-current="page"]) .nav-link:not([aria-current="page"]){
  display:none;
}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  width:44px;height:44px;flex-direction:column;align-items:center;justify-content:center;
  gap:5px;border:1px solid var(--line-strong);border-radius:12px;
  background:rgba(243,231,211,.05);
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);background:rgba(56,232,200,.1)}
.nav-toggle__bar{
  width:20px;height:2px;border-radius:2px;background:var(--cream);
  transition:transform .25s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(7px) 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(-7px) rotate(-45deg)}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;
  font-family:var(--font-sans);font-size:15px;font-weight:700;letter-spacing:.02em;
  white-space:nowrap;
  transition:transform .2s var(--ease),box-shadow .3s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease);
}
.btn--red{background:var(--grad-hot);color:#fff;box-shadow:0 10px 28px -14px rgba(225,6,0,.95)}
.btn--red:hover{transform:translateY(-2px);box-shadow:0 16px 34px -14px rgba(255,61,46,1)}
.btn--ghost{border-color:var(--line-strong);background:rgba(243,231,211,.04);color:var(--cream)}
.btn--ghost:hover{border-color:var(--cyan);color:#fff;box-shadow:0 0 0 1px rgba(56,232,200,.35)}
.btn--sm{padding:10px 18px;font-size:13px}
.btn:active{transform:translateY(0)}

/* ---------- 8. 移动端快捷条 ---------- */
.quickbar{
  display:none;
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  grid-template-columns:repeat(4,1fr);
  padding:6px 8px calc(6px + env(safe-area-inset-bottom,0px));
  background:rgba(11,10,15,.94);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
}
.quickbar__link{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:8px 4px;border-radius:12px;
  font-size:12px;color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.quickbar__link:hover,.quickbar__link[aria-current="page"]{color:var(--cream);background:rgba(74,107,255,.16)}
.quickbar__icon{
  width:18px;height:18px;border-radius:6px;
  background:linear-gradient(135deg,rgba(74,107,255,.85),rgba(138,92,255,.85));
  box-shadow:0 0 10px rgba(74,107,255,.4);
}
.quickbar__link[aria-current="page"] .quickbar__icon{background:var(--grad-hot);box-shadow:0 0 12px rgba(255,61,46,.6)}
.quickbar__label{font-weight:500}

/* ---------- 9. 版面容器 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:920px}
.section{padding:var(--sp5) 0}
.section--tight{padding:var(--sp4) 0}
.section--ink{background:linear-gradient(180deg,rgba(23,19,28,.9),rgba(11,10,15,.4))}
.section--paper{background:var(--cream);color:#1B1620}
.section--paper h1,.section--paper h2,.section--paper h3,.section--paper h4{color:#15121A}
.section--paper p,.section--paper .muted{color:#574F45}
.section--paper .lede{color:#3B342C}
.section--paper .eyebrow{color:#A80400}
.section--paper .eyebrow::before{background:linear-gradient(90deg,var(--red),transparent)}
.section--paper .card{background:#FFF9EE;border-color:rgba(21,18,26,.12);color:#1B1620}
.section--paper .card h3,.section--paper .card h4{color:#15121A}
.section--paper .stat__value{color:#15121A}
.section--paper .stat__label{color:#6A6156}

.split{display:grid;grid-template-columns:38fr 62fr;gap:var(--sp5);align-items:start}
.split--reverse{grid-template-columns:62fr 38fr}

.grid{display:grid;gap:var(--sp3)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.col-2{grid-column:span 2}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-9{grid-column:span 9}

/* ---------- 10. 通用组件 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--red-text);
  margin-bottom:var(--sp2);
}
.eyebrow::before{content:"";width:26px;height:1px;background:linear-gradient(90deg,var(--red),transparent)}

.glass{
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);
  border-radius:var(--r);
}
.paper{background:var(--cream);color:#1B1620;border-radius:var(--r);border:1px solid rgba(21,18,26,.1)}

.card{
  position:relative;overflow:hidden;
  padding:var(--sp3);border-radius:var(--r);
  background:var(--ink-2);border:1px solid var(--line);
  transition:border-color .25s var(--ease),transform .25s var(--ease),box-shadow .3s var(--ease);
}
.card::after{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;
  background:var(--grad-neon);opacity:0;transition:opacity .25s var(--ease);
}
.card:hover{border-color:var(--line-strong);transform:translateY(-3px);box-shadow:0 24px 50px -34px rgba(74,107,255,.9)}
.card:hover::after{opacity:1}
.card--flush{padding:0}

.data-card{display:flex;flex-direction:column;gap:var(--sp2)}
.stat{display:flex;flex-direction:column;gap:6px}
.stat__value{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-weight:700;
  font-size:clamp(28px,3.4vw,40px);line-height:1;color:var(--cream);
}
.stat__value--cyan{color:var(--cyan)}
.stat__value--red{color:var(--orange)}
.stat__unit{font-size:.55em;color:var(--muted);margin-left:.15em;font-weight:500}
.stat__label{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--muted);text-transform:uppercase}

.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 15px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(243,231,211,.04);
  font-size:13px;font-weight:500;color:var(--paper);cursor:pointer;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.chip:hover{border-color:var(--cyan);color:#fff}
.chip.is-active,.chip[aria-pressed="true"]{
  background:var(--grad-neon);border-color:transparent;color:#fff;
  box-shadow:0 8px 22px -12px rgba(74,107,255,.95);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;border-radius:999px;
  background:rgba(225,6,0,.18);border:1px solid rgba(255,61,46,.45);
  font-family:var(--font-mono);font-size:11px;font-weight:700;letter-spacing:.08em;color:var(--red-text);
}
.is-filtered-out{display:none !important}

.rule{height:1px;background:var(--line);margin:var(--sp3) 0}
.neon-line{
  height:1px;margin:0;
  background:linear-gradient(90deg,transparent,rgba(74,107,255,.75),rgba(138,92,255,.75),rgba(225,6,0,.65),transparent);
}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
  margin-bottom:var(--sp3);
}
.breadcrumbs__item{color:var(--muted)}
.breadcrumbs a.breadcrumbs__item:hover{color:var(--red-text)}
.breadcrumbs__sep{color:rgba(154,160,174,.5)}

/* 图片容器：页面阶段放入 <img> 或内联 SVG */
.media-frame{
  position:relative;isolation:isolate;overflow:hidden;
  border-radius:var(--r);border:1px solid var(--line);
  background:
    radial-gradient(120% 90% at 18% 8%,rgba(74,107,255,.22),transparent 60%),
    radial-gradient(120% 90% at 88% 92%,rgba(138,92,255,.2),transparent 62%),
    linear-gradient(160deg,var(--ink-3),var(--ink) 72%);
}
.media-frame::before{
  content:"";position:absolute;inset:0;z-index:0;
  background-image:
    linear-gradient(rgba(154,160,174,.14) 1px,transparent 1px),
    linear-gradient(90deg,rgba(154,160,174,.14) 1px,transparent 1px);
  background-size:34px 34px;
  -webkit-mask-image:radial-gradient(80% 70% at 50% 40%,#000 20%,transparent 100%);
  mask-image:radial-gradient(80% 70% at 50% 40%,#000 20%,transparent 100%);
  opacity:.75;
}
.media-frame > img,.media-frame > svg{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:16/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--banner{aspect-ratio:21/9}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:2;
  padding:14px 16px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--paper);
  background:linear-gradient(to top,rgba(11,10,15,.92),transparent);
}

/* 右侧悬浮章节索引（页面自建锚点，样式共享） */
.rail{
  position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:70;
  display:flex;flex-direction:column;gap:10px;
  padding:14px 8px;border-radius:999px;
  background:var(--glass);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border:1px solid var(--line);
}
.rail__link{
  position:relative;display:block;width:10px;height:10px;border-radius:50%;
  background:rgba(243,231,211,.25);
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.rail__link:hover{background:var(--cyan);transform:scale(1.25)}
.rail__link[aria-current="true"]{background:var(--orange);box-shadow:0 0 0 4px rgba(255,61,46,.22)}

/* 折叠面板 */
.disclosure__toggle{
  display:inline-flex;align-items:center;gap:10px;
  font-weight:700;color:var(--cream);
}
.disclosure__toggle::after{
  content:"";width:8px;height:8px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg);transition:transform .25s var(--ease);
}
.disclosure__toggle[aria-expanded="true"]::after{transform:rotate(-135deg)}
.disclosure__panel{padding-top:var(--sp2);color:var(--paper)}

/* ---------- 11. 滚动进度 ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;z-index:120;
  width:100%;height:2px;pointer-events:none;
  transform:scaleX(var(--progress,0));transform-origin:0 50%;
  background:linear-gradient(90deg,var(--red),var(--violet),var(--cyan));
}

/* ---------- 12. 滚动显现 ---------- */
.reveal{
  opacity:0;transform:translateY(24px);
  transition:opacity var(--dur) var(--ease) var(--reveal-delay,0ms),
             transform var(--dur) var(--ease) var(--reveal-delay,0ms);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:var(--sp6);
  padding-top:var(--sp5);
  background:linear-gradient(180deg,rgba(23,19,28,.92),var(--ink) 70%);
  border-top:1px solid var(--line);
}
.footer__grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.4fr;gap:var(--sp4)}
.footer__col{min-width:0}
.footer__brand{display:inline-block;margin-bottom:var(--sp2)}
.footer__brand-mark{
  font-family:var(--font-serif);font-weight:900;font-size:26px;letter-spacing:.08em;
  background-image:linear-gradient(100deg,var(--cream),var(--blue) 70%,var(--violet));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.footer__note{font-size:14px;line-height:1.8;color:var(--muted);max-width:32ch}
.footer__stamp{margin-top:var(--sp2);font-size:12px;letter-spacing:.22em;color:rgba(154,160,174,.7)}
.footer__title{
  font-family:var(--font-mono);font-size:12px;font-weight:700;
  letter-spacing:.2em;text-transform:uppercase;color:var(--muted);
  margin-bottom:var(--sp2);
}
.footer__links{display:flex;flex-direction:column;gap:10px}
.footer__link{font-size:15px;color:var(--paper);transition:color .2s var(--ease),padding-left .2s var(--ease)}
.footer__link:hover{color:var(--red-text);padding-left:4px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-block;padding:5px 12px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(243,231,211,.04);
  font-size:12px;color:var(--paper);
}
.contact-list{display:flex;flex-direction:column;gap:var(--sp2)}
.contact-row{display:flex;flex-wrap:wrap;align-items:flex-start;gap:10px}
.contact-row__label{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);padding-top:4px;min-width:44px;
}
.contact-row__value{font-size:14px;color:var(--paper);word-break:break-all;flex:1 1 140px}
.copy-btn{
  padding:4px 12px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(243,231,211,.05);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--paper);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.copy-btn:hover{border-color:var(--cyan);color:#fff}
.copy-btn[data-copied="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(56,232,200,.12)}
.footer__hint{margin-top:var(--sp2);font-size:12px;color:var(--muted)}
.footer__legal{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:var(--sp2);font-size:13px;color:var(--muted)}
.legal-link{color:var(--muted);transition:color .2s var(--ease)}
a.legal-link:hover{color:var(--cream)}
.site-footer .neon-line{margin-top:var(--sp5)}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;
  padding:20px 0 28px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);
}
.footer__domain{color:rgba(154,160,174,.7)}

/* ---------- 14. 响应式 ---------- */
@media (max-width:1180px){
  :root{--gutter:40px}
  .split,.split--reverse{grid-template-columns:1fr;gap:var(--sp4)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:var(--sp4)}
}
@media (max-width:1024px){
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .col-2,.col-3,.col-4{grid-column:span 6}
  .col-5,.col-6,.col-7,.col-8,.col-9{grid-column:span 12}
  .rail{display:none}
}
@media (max-width:900px){
  body{padding-bottom:82px}
  .masthead{
    grid-template-columns:1fr auto;
    grid-template-areas:
      "brand actions"
      "nav nav";
    padding:12px 20px 0;
    gap:8px;
  }
  .masthead__meta{display:none}
  .masthead__brand{text-align:left;justify-self:start}
  .brand{align-items:flex-start}
  .brand__mark{font-size:26px}
  .brand__tag{display:none}
  .nav-toggle{display:inline-flex}
  .masthead__nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    padding:12px 20px 20px;
    background:rgba(11,10,15,.97);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .masthead__nav[data-open]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{justify-content:space-between;padding:14px 16px;border-radius:12px;font-size:16px}
  .nav-link::after{left:16px;right:auto;width:22px;bottom:8px}
  .site-header[data-shrunk] .masthead{padding-top:8px}
  .site-header[data-shrunk] .nav-link:not([aria-current="page"]):not(:hover){opacity:1}
  .quickbar{display:grid}
  .section{padding:var(--sp4) 0}
  .footer__grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  :root{--gutter:20px;--sp5:48px;--sp6:72px}
  body{font-size:16px}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .grid--12 > *{grid-column:1 / -1}
  .grid--4,.grid--3,.grid--2{grid-template-columns:1fr}
  .display{font-size:clamp(34px,11vw,52px)}
  .lede{font-size:17px}
  .footer__bottom{flex-direction:column;align-items:flex-start}
}

/* ---------- 15. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
  .status-dot{animation:none}
  .scroll-progress{display:none}
  .card:hover{transform:none}
  .btn--red:hover{transform:none}
}