/* ============================================================
   site.css — 十博10 中文专区 共享外壳与通用组件
   语义：夜色数据灯带 / 图纸网格 / 档案标签
   ============================================================ */

:root{
  --ink:#0A1524;
  --panel:#0F2136;
  --steel:#17324A;
  --cyan:#3FE0CE;
  --gold:#F0BE6A;
  --chalk:#E9EEF3;
  --mist:#A3B6C7;
  --grid:#5D7891;
  --moss:#3E6F5E;
  --clay:#A9683F;
  --paper:#CFC8B8;

  --line:rgba(93,120,145,.26);
  --line-soft:rgba(93,120,145,.16);
  --lift:0 1px 0 rgba(255,255,255,.06),0 12px 32px rgba(0,0,0,.35);
  --ease:cubic-bezier(.2,.7,.2,1);

  --font-sans:'Source Han Sans SC','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono','Roboto Mono',ui-monospace,SFMono-Regular,Consolas,monospace;

  --wrap:1240px;
  --gutter:clamp(18px,4vw,56px);
  --header-h:122px;
  --radius:3px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
}
html,body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0}
button,:where(a,summary,[tabindex]):focus-visible{outline:2px solid var(--cyan);outline-offset:3px}
button:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 基础排版 ---------- */
body{
  min-height:100vh;
  overflow-x:hidden;
  font-family:var(--font-sans);
  font-weight:400;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--chalk);
  background-color:var(--ink);
  background-image:
    linear-gradient(to right,rgba(93,120,145,.07) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(93,120,145,.07) 1px,transparent 1px);
  background-size:72px 72px;
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.18;
  color:var(--chalk);
}
p{line-height:1.75}
strong{font-weight:700;color:var(--chalk)}

/* ---------- 布局容器 ---------- */
.sk-wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.sk-page{padding-top:calc(var(--header-h) + clamp(18px,3vw,40px))}
.sk-mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.04em;
}

/* ---------- skip link ---------- */
.sk-skip{
  position:fixed;
  top:10px;
  left:10px;
  z-index:300;
  padding:10px 18px;
  background:var(--gold);
  color:#20160a;
  font-weight:800;
  font-size:14px;
  border-radius:var(--radius);
  transform:translateY(-180%);
  transition:transform .2s var(--ease);
}
.sk-skip:focus,
.sk-skip:focus-visible{transform:none}

/* ============================================================
   HEADER
   ============================================================ */
.sk-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  color:var(--chalk);
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .26s var(--ease),border-color .26s var(--ease),box-shadow .26s var(--ease);
}
.sk-header[data-scrolled]{
  background:rgba(10,21,36,.94);
  -webkit-backdrop-filter:blur(10px) saturate(120%);
  backdrop-filter:blur(10px) saturate(120%);
  border-bottom-color:rgba(63,224,206,.22);
  box-shadow:0 1px 0 rgba(255,255,255,.04),0 18px 40px rgba(0,0,0,.45);
}
.sk-header[data-nav-open]{
  background:var(--ink);
  border-bottom-color:rgba(63,224,206,.22);
}

/* 状态数据带 */
.sk-statusbar{
  position:relative;
  overflow:hidden;
  max-height:40px;
  background:linear-gradient(90deg,rgba(23,50,74,.92),rgba(10,21,36,.5));
  border-bottom:1px solid var(--line-soft);
  transition:max-height .26s var(--ease),opacity .2s var(--ease),border-color .2s var(--ease);
}
.sk-statusbar::after{
  content:"";
  position:absolute;
  top:0;right:0;bottom:0;
  width:132px;
  background-image:repeating-linear-gradient(45deg,rgba(63,224,206,.2) 0 1px,transparent 1px 8px);
  pointer-events:none;
}
.sk-header[data-scrolled] .sk-statusbar,
.sk-header[data-nav-open] .sk-statusbar{
  max-height:0;
  opacity:0;
  border-bottom-color:transparent;
}
.sk-statusbar__inner{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:34px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
  white-space:nowrap;
}
.sk-statusbar__item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-width:0;
}
.sk-statusbar__item--sep{
  padding-left:20px;
  border-left:1px solid rgba(93,120,145,.3);
}
.sk-statusbar__item--last{margin-left:auto;color:var(--grid);font-size:11px}
.sk-dot{
  width:7px;height:7px;
  flex:none;
  border-radius:50%;
  background:var(--moss);
  box-shadow:0 0 0 3px rgba(62,111,94,.22);
  transition:background-color .2s var(--ease),box-shadow .2s var(--ease);
}
.sk-dot[data-state="on"]{
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(63,224,206,.16),0 0 10px rgba(63,224,206,.7);
}
.sk-dot[data-state="off"]{
  background:var(--clay);
  box-shadow:0 0 0 3px rgba(169,104,63,.22);
}

/* 品牌行 */
.sk-header__inner{
  position:relative;
  z-index:2;
  display:flex;
  align-items:center;
  gap:24px;
  min-height:86px;
  transition:min-height .26s var(--ease);
}
.sk-header[data-scrolled] .sk-header__inner{min-height:64px}

.sk-brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  flex:none;
  padding-block:8px;
}
.sk-brand__mark{
  position:relative;
  width:30px;height:30px;
  flex:none;
  background:linear-gradient(135deg,var(--cyan),var(--gold));
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.sk-brand__mark::after{
  content:"";
  position:absolute;
  inset:6px;
  background:var(--ink);
  clip-path:polygon(0 0,100% 0,100% 62%,62% 100%,0 100%);
}
.sk-brand__text{display:flex;flex-direction:column;gap:2px;line-height:1.1;min-width:0}
.sk-brand__name{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--chalk)}
.sk-brand__tag{
  font-size:11px;
  letter-spacing:.14em;
  color:var(--mist);
  max-height:18px;
  overflow:hidden;
  transition:max-height .26s var(--ease),opacity .18s var(--ease);
}
.sk-header[data-scrolled] .sk-brand__tag{max-height:0;opacity:0}

/* 导航 */
.sk-nav{
  display:flex;
  align-items:center;
  margin-left:auto;
  min-width:0;
}
.sk-nav__list{
  display:flex;
  align-items:flex-start;
  gap:clamp(8px,1.5vw,26px);
}
.sk-nav__item{min-width:0}
.sk-nav__link{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:3px;
  padding:8px 2px;
  color:var(--mist);
  transition:color .18s var(--ease);
}
.sk-nav__num{
  font-size:10px;
  letter-spacing:.16em;
  color:var(--grid);
  transition:color .18s var(--ease);
}
.sk-nav__label{
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  white-space:nowrap;
}
.sk-nav__link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  box-shadow:0 0 8px rgba(63,224,206,.8);
  transition:transform .22s var(--ease);
}
.sk-nav__link:hover,
.sk-nav__link:focus-visible{color:var(--chalk)}
.sk-nav__link:hover .sk-nav__num,
.sk-nav__link:focus-visible .sk-nav__num{color:var(--gold)}
.sk-nav__link:hover::after,
.sk-nav__link:focus-visible::after{transform:scaleX(1)}
.sk-nav__link[aria-current="page"]{color:var(--chalk)}
.sk-nav__link[aria-current="page"] .sk-nav__num{color:var(--cyan)}
.sk-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.sk-nav__foot{display:none}
.sk-nav__note{
  font-size:12px;
  letter-spacing:.06em;
  color:var(--grid);
}

/* 头部动作区 */
.sk-header__actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex:none;
}

/* 汉堡按钮 */
.sk-burger{
  display:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  width:44px;height:40px;
  border:1px solid rgba(163,182,199,.3);
  border-radius:var(--radius);
  cursor:pointer;
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.sk-burger:hover{border-color:var(--cyan)}
.sk-burger__bar{
  display:block;
  width:18px;height:2px;
  background:var(--chalk);
  transition:transform .2s var(--ease),opacity .15s var(--ease);
}
.sk-burger[aria-expanded="true"] .sk-burger__bar:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sk-burger[aria-expanded="true"] .sk-burger__bar:nth-child(2){opacity:0}
.sk-burger[aria-expanded="true"] .sk-burger__bar:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* 滚动进度灯带 */
.sk-progress{
  position:absolute;
  left:0;bottom:-1px;
  width:100%;height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transform:scaleX(var(--p,0));
  transform-origin:left;
  opacity:0;
  box-shadow:0 0 10px rgba(63,224,206,.6);
  transition:opacity .2s var(--ease);
  pointer-events:none;
}
.sk-header[data-scrolled] .sk-progress{opacity:1}

/* ---------- 按钮 ---------- */
.sk-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:40px;
  padding:0 18px;
  font-size:13px;
  font-weight:700;
  letter-spacing:.06em;
  line-height:1.2;
  border:1px solid transparent;
  border-radius:var(--radius);
  cursor:pointer;
  text-align:center;
  transition:transform .15s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.sk-btn--gold{
  background:var(--gold);
  color:#20160a;
}
.sk-btn--gold:hover{
  background:#f7cd86;
  transform:translateY(-1px);
  box-shadow:0 0 14px rgba(240,190,106,.42);
}
.sk-btn--ghost{
  border-color:rgba(163,182,199,.3);
  background:rgba(15,33,54,.4);
  color:var(--chalk);
}
.sk-btn--ghost:hover{
  border-color:var(--cyan);
  color:var(--cyan);
  transform:translateY(-1px);
  box-shadow:0 0 0 1px rgba(63,224,206,.18),0 0 14px rgba(63,224,206,.22);
}
.sk-btn--block{width:100%}

/* ---------- 标签 ---------- */
.sk-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  align-self:flex-start;
  padding:4px 12px;
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
  line-height:1.6;
  color:var(--chalk);
  background:var(--moss);
  clip-path:polygon(7px 0,100% 0,100% calc(100% - 7px),calc(100% - 7px) 100%,0 100%,0 7px);
}
.sk-tag--gold{background:rgba(240,190,106,.16);color:var(--gold);box-shadow:inset 0 0 0 1px rgba(240,190,106,.45)}
.sk-tag--cyan{background:rgba(63,224,206,.13);color:var(--cyan);box-shadow:inset 0 0 0 1px rgba(63,224,206,.4)}
.sk-tag--clay{background:rgba(169,104,63,.24);color:#E4A87C;box-shadow:inset 0 0 0 1px rgba(169,104,63,.6)}
.sk-tag--paper{background:rgba(207,200,184,.12);color:var(--paper);box-shadow:inset 0 0 0 1px rgba(207,200,184,.35)}

/* ---------- 资料卡 ---------- */
.sk-card{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:12px;
  padding:clamp(18px,2.4vw,28px);
  background:var(--panel);
  border:1px solid var(--steel);
  border-radius:var(--radius);
  box-shadow:var(--lift);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.sk-card:hover,
.sk-card:focus-within{
  transform:translateY(-4px);
  border-color:rgba(63,224,206,.5);
  box-shadow:0 1px 0 rgba(255,255,255,.08),0 16px 40px rgba(0,0,0,.45),0 0 22px rgba(63,224,206,.12);
}
.sk-card--notch::before{
  content:"";
  position:absolute;
  top:0;right:0;
  width:0;height:0;
  border-top:22px solid rgba(63,224,206,.22);
  border-left:22px solid transparent;
  border-top-right-radius:var(--radius);
  pointer-events:none;
}

/* ---------- 数据面板 ---------- */
.sk-data{
  display:flex;
  flex-wrap:wrap;
  gap:clamp(14px,2vw,32px);
  padding:14px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.sk-data__item{display:flex;flex-direction:column;gap:4px;min-width:104px}
.sk-data__key{font-size:11px;letter-spacing:.16em;color:var(--mist)}
.sk-data__val{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:16px;
  color:var(--chalk);
}
.sk-data__val--gold{color:var(--gold)}

/* ---------- 章节标题组 ---------- */
.sk-section-head{
  display:flex;
  flex-direction:column;
  gap:10px;
  max-width:56ch;
  margin-bottom:clamp(22px,3vw,38px);
}
.sk-eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--cyan);
}
.sk-title{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
  color:var(--chalk);
}
.sk-lede{
  font-size:clamp(15px,1.4vw,17px);
  line-height:1.75;
  color:var(--mist);
}

/* ---------- 面包屑 ---------- */
.sk-breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
}
.sk-breadcrumb a{
  color:var(--mist);
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.sk-breadcrumb a:hover{color:var(--cyan);border-bottom-color:rgba(63,224,206,.5)}
.sk-breadcrumb__sep{color:var(--grid)}
.sk-breadcrumb [aria-current="page"]{color:var(--chalk)}

/* ---------- 正文排版 ---------- */
.sk-prose{
  max-width:70ch;
  font-size:16.5px;
  line-height:1.8;
  color:var(--mist);
}
.sk-prose h2{
  margin-top:2em;
  font-size:clamp(20px,2.2vw,26px);
  color:var(--chalk);
}
.sk-prose h3{
  margin-top:1.6em;
  font-size:18px;
  color:var(--chalk);
}
.sk-prose p+p{margin-top:1em}
.sk-prose a{
  color:var(--cyan);
  border-bottom:1px solid rgba(63,224,206,.4);
  transition:border-color .18s var(--ease);
}
.sk-prose a:hover{border-bottom-color:var(--cyan)}
.sk-prose ul{display:grid;gap:.6em;margin-block:1em}
.sk-prose ul li{position:relative;padding-left:20px}
.sk-prose ul li::before{
  content:"";
  position:absolute;
  left:0;top:.78em;
  width:8px;height:1px;
  background:var(--cyan);
}
.sk-prose strong{color:var(--chalk)}

/* ---------- 网格 ---------- */
.sk-grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.sk-grid--7-5{grid-template-columns:7fr 5fr}
.sk-grid--5-7{grid-template-columns:5fr 7fr}
.sk-grid--8-4{grid-template-columns:8fr 4fr}
.sk-grid--cards{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}

/* ---------- 45° 斜切分隔 ---------- */
.sk-bevel{
  position:relative;
  height:1px;
  margin-block:clamp(36px,6vw,80px);
  background:linear-gradient(90deg,transparent,var(--grid),transparent);
}
.sk-bevel::after{
  content:"";
  position:absolute;
  left:0;top:-7px;
  width:1px;height:15px;
  background:var(--cyan);
  transform:skewX(-45deg);
  box-shadow:0 0 8px rgba(63,224,206,.6);
}

/* ---------- 图片容器基础规则 ---------- */
.sk-figure{display:flex;flex-direction:column;gap:10px}
.sk-figure__media{
  position:relative;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--steel);
  border-radius:var(--radius);
  background:
    radial-gradient(120% 90% at 80% 0%,rgba(23,50,74,.9),transparent 70%),
    linear-gradient(160deg,var(--panel),var(--ink));
}
.sk-figure__media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(to right,rgba(93,120,145,.16) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(93,120,145,.16) 1px,transparent 1px);
  background-size:32px 32px;
  opacity:.75;
  pointer-events:none;
}
.sk-figure__media img{
  position:relative;
  z-index:1;
  width:100%;height:100%;
  object-fit:cover;
}
.sk-figure--wide .sk-figure__media{aspect-ratio:21/9}
.sk-figure--tall .sk-figure__media{aspect-ratio:4/5}
.sk-figure__cap{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- 返回顶部 ---------- */
.sk-totop{
  position:fixed;
  right:clamp(14px,2vw,26px);
  bottom:clamp(14px,2vw,26px);
  z-index:95;
  display:grid;
  place-items:center;
  width:48px;height:48px;
  border-radius:50%;
  background:rgba(10,21,36,.92);
  border:1px solid rgba(63,224,206,.3);
  color:var(--chalk);
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease),border-color .18s var(--ease);
}
.sk-totop[data-show]{opacity:1;visibility:visible;transform:none}
.sk-totop:hover{border-color:var(--cyan)}
.sk-totop__ring{
  position:absolute;
  inset:-1px;
  border-radius:50%;
  background:conic-gradient(var(--cyan) calc(var(--p,0) * 1%),transparent 0);
  -webkit-mask:radial-gradient(circle,transparent 0 21px,#000 21.5px);
  mask:radial-gradient(circle,transparent 0 21px,#000 21.5px);
  pointer-events:none;
}
.sk-totop__arrow{
  width:11px;height:11px;
  border-left:2px solid var(--cyan);
  border-top:2px solid var(--cyan);
  transform:rotate(45deg) translate(1px,1px);
}

/* ============================================================
   FOOTER
   ============================================================ */
.sk-footer{
  position:relative;
  margin-top:clamp(60px,10vw,140px);
  background:linear-gradient(180deg,var(--ink) 0%,#081120 100%);
  border-top:1px solid rgba(63,224,206,.22);
  color:var(--mist);
}
.sk-footer__rail{
  height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(63,224,206,.55) 0 2px,transparent 2px 26px);
  opacity:.5;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);
  mask-image:linear-gradient(90deg,transparent,#000 15%,#000 85%,transparent);
}
.sk-footer__top{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  padding-block:clamp(34px,5vw,60px) clamp(24px,3vw,36px);
}
.sk-footer__eyebrow{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.24em;
  color:var(--cyan);
}
.sk-footer__lede{
  max-width:44ch;
  font-size:15px;
  line-height:1.75;
  color:var(--mist);
}
.sk-footer__grid{
  display:grid;
  grid-template-columns:1.05fr 1.15fr .85fr 1.05fr;
  gap:clamp(20px,3vw,44px);
  padding-bottom:clamp(34px,5vw,60px);
}
.sk-fcol{
  display:flex;
  flex-direction:column;
  gap:14px;
  min-width:0;
}
.sk-fcol__title{
  display:flex;
  align-items:center;
  gap:10px;
  padding-bottom:10px;
  font-size:14px;
  font-weight:800;
  letter-spacing:.06em;
  color:var(--chalk);
  border-bottom:1px solid rgba(93,120,145,.25);
}
.sk-fcol__title::before{
  content:"";
  width:6px;height:6px;
  flex:none;
  background:var(--cyan);
  transform:rotate(45deg);
}
.sk-fcol__list{
  display:flex;
  flex-direction:column;
  gap:9px;
  font-size:13.5px;
  line-height:1.7;
  color:var(--mist);
}
.sk-fcol__list a{
  position:relative;
  color:var(--mist);
  transition:color .18s var(--ease);
}
.sk-fcol__list a::after{
  content:"";
  position:absolute;
  left:0;bottom:-2px;
  width:100%;height:1px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .2s var(--ease);
}
.sk-fcol__list a:hover{color:var(--chalk)}
.sk-fcol__list a:hover::after{transform:scaleX(1)}
.sk-fcol__mono{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12.5px;
  letter-spacing:.03em;
  color:var(--chalk);
  word-break:break-word;
}
.sk-fcol__note{
  font-size:12px;
  line-height:1.65;
  color:var(--grid);
}
.sk-fcol--anchor{
  position:relative;
  padding:clamp(16px,2vw,24px);
  border:1px solid rgba(240,190,106,.55);
  border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(240,190,106,.07),rgba(15,33,54,.6));
  box-shadow:0 0 0 1px rgba(240,190,106,.12),0 0 26px rgba(240,190,106,.14),var(--lift);
}
.sk-fcol--anchor::after{
  content:"";
  position:absolute;
  right:-1px;bottom:-1px;
  width:0;height:0;
  border-bottom:18px solid rgba(240,190,106,.45);
  border-left:18px solid transparent;
  pointer-events:none;
}
.sk-fcol--anchor .sk-fcol__title::before{background:var(--gold)}
.sk-fcol--anchor .sk-fcol__note{color:rgba(240,190,106,.72)}
.sk-fcol--anchor .sk-fcol__list{color:var(--chalk)}
.sk-footer__base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding-block:20px 26px;
  border-top:1px solid rgba(93,120,145,.22);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--grid);
}
.sk-footer__legal{margin:0}
.sk-footer__legalnav{display:flex;flex-wrap:wrap;gap:18px}
.sk-footer__legalnav a{
  color:var(--mist);
  transition:color .18s var(--ease);
}
.sk-footer__legalnav a:hover{color:var(--cyan)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1180px){
  .sk-header__actions .sk-btn--ghost{display:none}
  .sk-nav__list{gap:clamp(6px,1.1vw,16px)}
  .sk-nav__label{font-size:13px}
}

@media (max-width:1023px){
  :root{--header-h:104px}
  .sk-burger{display:flex}
  .sk-header__actions .sk-btn--gold{display:none}

  .sk-nav{
    position:fixed;
    top:0;left:0;right:0;bottom:0;
    z-index:1;
    margin:0;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    padding:clamp(120px,17vh,164px) var(--gutter) 40px;
    background:rgba(9,18,31,.985);
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .sk-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .sk-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
    width:100%;
    border-top:1px solid var(--line-soft);
  }
  .sk-nav__item{border-bottom:1px solid var(--line-soft)}
  .sk-nav__link{
    flex-direction:row;
    align-items:baseline;
    gap:14px;
    padding:16px 0;
    color:var(--chalk);
  }
  .sk-nav__label{font-size:19px;font-weight:800;letter-spacing:-.01em}
  .sk-nav__num{font-size:11px;color:var(--grid)}
  .sk-nav__link::after{display:none}
  .sk-nav__link[aria-current="page"]{padding-left:12px}
  .sk-nav__link[aria-current="page"]::before{
    content:"";
    position:absolute;
    left:0;top:50%;
    width:4px;height:4px;
    background:var(--cyan);
    transform:translateY(-50%) rotate(45deg);
    box-shadow:0 0 8px rgba(63,224,206,.8);
  }
  .sk-nav__foot{
    display:flex;
    flex-direction:column;
    gap:12px;
    margin-top:28px;
  }

  .sk-footer__grid{grid-template-columns:1fr 1fr}
  .sk-fcol--anchor{order:-1;grid-column:1 / -1}
}

@media (max-width:900px){
  .sk-grid--7-5,
  .sk-grid--5-7,
  .sk-grid--8-4{grid-template-columns:1fr}
}

@media (max-width:760px){
  .sk-statusbar__item--sep{display:none}
  .sk-statusbar__inner{font-size:11.5px;gap:12px}
  .sk-statusbar__item--last{display:none}
  .sk-brand__name{font-size:15.5px}
  .sk-header__inner{gap:14px;min-height:72px}
  .sk-header[data-scrolled] .sk-header__inner{min-height:60px}
}

@media (max-width:640px){
  :root{--header-h:96px}
  .sk-statusbar__inner{min-height:30px}
  .sk-header__inner{min-height:66px}
  .sk-brand__mark{width:26px;height:26px}
  .sk-brand__name{font-size:15px}
  .sk-brand__tag{font-size:10px;letter-spacing:.1em}
  .sk-footer__grid{grid-template-columns:1fr}
  .sk-footer__base{flex-direction:column;align-items:flex-start}
  .sk-footer__legalnav{gap:14px}
  .sk-totop{width:44px;height:44px}
  .sk-totop__ring{
    -webkit-mask:radial-gradient(circle,transparent 0 19px,#000 19.5px);
    mask:radial-gradient(circle,transparent 0 19px,#000 19.5px);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  .sk-card:hover,
  .sk-card:focus-within,
  .sk-btn:hover,
  .sk-totop{transform:none}
  .sk-totop{transform:none}
}