/* ============================================================
   酷游客服 · 共享样式 /assets/site.css
   深海蓝底 + 电光青路径 + 暖橘看板 + 米白纸卡
   ============================================================ */

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

/* ---------- 2. Tokens ---------- */
:root{
  --ink:#071B2E;
  --ink-deep:#05141F;
  --panel:#0F2F4A;
  --line:#1D4C6E;
  --cyan:#34E3C8;
  --orange:#FF8A3D;
  --paper:#EDE8DC;
  --paper-ink:#0B1B27;
  --stone:#B9B3A6;
  --moss:#6F8F73;
  --clay:#B4674A;
  --white:#F3F6F8;
  --soft:#C7D6E1;

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

  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
  --pill:999px;
  --dur:.28s;
  --curve:cubic-bezier(.22,.61,.36,1);
  --header-space:86px;
}

/* ---------- 3. Base ---------- */
body{
  min-height:100vh;
  padding-top:var(--header-space);
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 84% -12%,rgba(52,227,200,.11),transparent 62%),
    radial-gradient(880px 520px at 4% 6%,rgba(255,138,61,.08),transparent 66%),
    repeating-linear-gradient(to bottom,rgba(29,76,110,.13) 0 1px,transparent 1px 112px),
    linear-gradient(180deg,#071B2E 0%,#08203A 46%,#071B2E 100%);
  background-attachment:fixed,fixed,scroll,fixed;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;letter-spacing:.04em;line-height:1.16;color:var(--white)}
h1{font-size:clamp(32px,5.4vw,54px)}
h2{font-size:clamp(25px,3.3vw,38px)}
h3{font-size:clamp(19px,2.2vw,24px)}
p{max-width:44em}
a{color:var(--cyan);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
::selection{background:var(--cyan);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

.skip-link{
  position:fixed;top:10px;left:12px;z-index:140;
  padding:10px 18px;border-radius:var(--pill);
  background:var(--cyan);color:var(--ink);
  font-size:14px;font-weight:700;letter-spacing:.04em;
  transform:translateY(-200%);
  transition:transform .2s var(--curve);
}
.skip-link:focus{transform:none;text-decoration:none}

/* ---------- 4. Layout ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap--narrow{max-width:880px}
.wrap--wide{max-width:1440px}
.section{padding-block:clamp(46px,7vw,96px)}
.section--tight{padding-block:clamp(26px,4vw,52px)}

.grid{display:grid;gap:clamp(16px,2.2vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid--split-rev{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.grid--rail{grid-template-columns:minmax(0,3fr) minmax(0,9fr)}
.shift-down{margin-top:clamp(18px,4vw,56px)}

.rule{height:1px;background:var(--line);margin-block:clamp(26px,4vw,50px)}
.rule--dashed{background:repeating-linear-gradient(to right,var(--line) 0 8px,transparent 8px 16px)}

/* ---------- 5. Text utilities ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;
  color:var(--cyan);margin-bottom:14px;text-transform:uppercase;
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor}
.lede{font-size:clamp(17px,1.6vw,19px);line-height:1.8;color:var(--soft);max-width:38em}
.muted{color:var(--stone)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}

/* ---------- 6. Labels ---------- */
.label{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;
  padding:5px 11px;border-radius:var(--pill);
  border:1px solid var(--line);background:rgba(15,47,74,.72);color:var(--stone);
}
.label--cyan{border-color:rgba(52,227,200,.55);color:var(--cyan);background:rgba(52,227,200,.10)}
.label--orange{border-color:rgba(255,138,61,.55);color:var(--orange);background:rgba(255,138,61,.10)}
.label--moss{border-color:rgba(111,143,115,.75);color:#A6C0AA;background:rgba(111,143,115,.16)}
.label--clay{border-color:rgba(180,103,74,.75);color:#D89C82;background:rgba(180,103,74,.16)}
.label--corner{position:absolute;top:-11px;left:18px;background:var(--ink)}

/* ---------- 7. Cards & board ---------- */
.paper{
  position:relative;
  background:var(--paper);color:var(--paper-ink);
  border:1px solid var(--line);
  padding:clamp(20px,2.6vw,32px);
  box-shadow:8px 8px 0 rgba(5,20,31,.62);
}
.paper--flat{box-shadow:none}
.paper__title{font-family:var(--font-display);font-size:clamp(20px,2.1vw,24px);font-weight:900;letter-spacing:.03em;margin-bottom:10px}
.paper p{color:#274050;line-height:1.8}
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,28px);
}
.card--stacked{box-shadow:6px 6px 0 rgba(5,20,31,.55)}
.card__title{font-family:var(--font-display);font-size:clamp(19px,2vw,23px);font-weight:900;letter-spacing:.03em;margin-bottom:8px;color:var(--white)}

.board{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.board__cell{background:var(--panel);padding:18px 20px}
.board__value{font-family:var(--font-mono);font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.1;color:var(--orange)}
.board__unit{font-size:14px;color:var(--stone);margin-left:4px}
.board__label{font-size:12px;letter-spacing:.12em;color:var(--stone);margin-top:6px}

/* ---------- 8. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 18px;border-radius:var(--pill);
  font-family:var(--font-body);font-size:14px;font-weight:700;letter-spacing:.04em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .22s var(--curve),border-color .22s var(--curve),color .22s var(--curve),transform .22s var(--curve);
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--orange);color:#2A1005;border-color:rgba(255,138,61,.65)}
.btn--primary:hover{background:#FFA05F}
.btn--ghost{background:rgba(52,227,200,.07);color:var(--cyan);border-color:rgba(52,227,200,.5)}
.btn--ghost:hover{background:rgba(52,227,200,.16);color:var(--cyan)}
.btn--compact{padding:9px 15px;font-size:13px}

/* ---------- 9. Breadcrumb ---------- */
.breadcrumb{margin-bottom:clamp(18px,2.4vw,28px)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;font-size:13px;letter-spacing:.06em;color:var(--stone)}
.breadcrumb__list li{display:inline-flex;align-items:center}
.breadcrumb__list li:not(:last-child)::after{content:"/";margin-inline:9px;color:var(--line)}
.breadcrumb__link{color:var(--stone)}
.breadcrumb__link:hover{color:var(--cyan);text-decoration:none}
.breadcrumb__list [aria-current="page"]{color:var(--white)}

/* ---------- 10. Tabs ---------- */
.tabs{width:100%}
.tabs__list{
  display:flex;flex-wrap:wrap;gap:5px;width:fit-content;max-width:100%;
  padding:5px;border:1px solid var(--line);border-radius:var(--pill);
  background:rgba(15,47,74,.6);
}
.tabs__tab{
  appearance:none;border:1px solid transparent;background:transparent;
  color:var(--stone);font-family:var(--font-body);font-size:14px;font-weight:500;letter-spacing:.06em;
  padding:8px 16px;border-radius:var(--pill);cursor:pointer;white-space:nowrap;
  transition:background-color .22s var(--curve),border-color .22s var(--curve),color .22s var(--curve);
}
.tabs__tab:hover{color:var(--white)}
.tabs__tab[aria-selected="true"]{background:rgba(52,227,200,.15);border-color:var(--cyan);color:var(--cyan)}
.tabs__panel{padding-top:clamp(20px,3vw,32px)}
.tabs__panel[hidden]{display:none}

/* ---------- 11. Folds ---------- */
.fold{border:1px solid var(--line);background:var(--panel)}
.fold+.fold{margin-top:-1px}
.fold__head{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;cursor:pointer;list-style:none;
  font-family:var(--font-display);font-size:16px;font-weight:900;letter-spacing:.03em;color:var(--white);
}
.fold__head::-webkit-details-marker{display:none}
.fold__head::after{content:"+";font-family:var(--font-mono);font-size:18px;color:var(--cyan);flex:0 0 auto}
.fold[open] .fold__head::after{content:"–";color:var(--orange)}
.fold__body{padding:0 20px 20px;color:var(--soft);font-size:16px}

/* ---------- 12. Figures ---------- */
.figure{margin:0;border:1px solid var(--line);background:var(--panel);overflow:hidden}
.figure__frame{
  position:relative;aspect-ratio:16/10;display:grid;place-items:center;
  background:
    linear-gradient(135deg,rgba(52,227,200,.13),rgba(255,138,61,.09)),
    repeating-linear-gradient(to right,rgba(29,76,110,.55) 0 1px,transparent 1px 44px);
}
.figure__img{width:100%;height:100%;object-fit:cover}
.figure__caption{padding:10px 14px;border-top:1px solid var(--line);font-size:12px;letter-spacing:.08em;color:var(--stone)}
.figure--wide .figure__frame{aspect-ratio:21/9}
.figure--tall .figure__frame{aspect-ratio:4/5}

/* ---------- 13. Doc ---------- */
.doc{max-width:40em}
.doc h2{font-size:clamp(23px,2.9vw,31px);margin:clamp(30px,4vw,46px) 0 14px}
.doc h3{font-size:clamp(18px,2.1vw,22px);margin:clamp(22px,3vw,32px) 0 10px}
.doc p{margin-bottom:16px;color:var(--soft)}
.doc-list{list-style:disc;padding-left:1.35em;margin-bottom:18px;color:var(--soft)}
.doc-list li{margin-bottom:8px}
.doc-list li::marker{color:var(--cyan)}
.doc-grid{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,9fr);gap:clamp(24px,4vw,56px)}
.doc-nav{position:sticky;top:calc(var(--header-space) + 12px)}
.doc-nav__title{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--stone);margin-bottom:12px}
.doc-nav__link{display:block;padding:7px 0 7px 12px;border-left:1px solid var(--line);font-size:14px;color:var(--stone)}
.doc-nav__link:hover{color:var(--cyan);border-left-color:var(--cyan);text-decoration:none}

/* ---------- 14. Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  padding:10px var(--gutter) 0;pointer-events:none;
}
.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;background:rgba(29,76,110,.6)}
.scroll-progress__bar{
  display:block;height:100%;width:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan),var(--orange));
}
.site-header__inner{
  position:relative;pointer-events:auto;
  max-width:var(--wrap);margin-inline:auto;
  display:flex;align-items:center;gap:clamp(10px,1.6vw,22px);
  padding:7px 8px 7px 16px;
  background:rgba(11,36,57,.9);
  border:1px solid var(--line);
  border-radius:var(--pill);
  box-shadow:0 16px 36px rgba(3,12,22,.55);
  transition:padding .3s var(--curve),background-color .3s var(--curve);
}
.site-header[data-scrolled] .site-header__inner{padding:3px 6px 3px 12px;background:rgba(9,30,49,.97)}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--white)}
.brand:hover{text-decoration:none}
.brand__mark{
  position:relative;width:30px;height:30px;flex:0 0 auto;
  border:1px solid var(--cyan);border-radius:10px;
  background:linear-gradient(150deg,rgba(52,227,200,.24),rgba(255,138,61,.12));
}
.brand__mark::before{
  content:"";position:absolute;left:6px;right:6px;top:8px;height:2px;
  background:var(--cyan);
  box-shadow:0 5px 0 rgba(52,227,200,.62),0 10px 0 rgba(255,138,61,.85);
}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-family:var(--font-display);font-size:17px;font-weight:900;letter-spacing:.08em}
.brand__tagline{font-size:11px;letter-spacing:.14em;color:var(--stone)}

.nav{margin-left:auto}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__item{display:flex}
.nav__link{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 12px;border-radius:var(--pill);border:1px solid transparent;
  color:var(--white);font-size:14px;font-weight:500;letter-spacing:.04em;white-space:nowrap;
  transition:background-color .2s var(--curve),border-color .2s var(--curve),color .2s var(--curve);
}
.nav__link:hover{background:rgba(52,227,200,.1);border-color:rgba(52,227,200,.35);text-decoration:none;color:var(--white)}
.nav__link[aria-current="page"]{background:rgba(52,227,200,.15);border-color:var(--cyan);color:var(--cyan)}
.nav__index{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--stone)}
.nav__link[aria-current="page"] .nav__index{color:var(--orange)}

.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:9px 14px;border-radius:var(--pill);
  background:rgba(15,47,74,.75);border:1px solid var(--line);color:var(--white);
  font-size:13px;font-weight:700;letter-spacing:.1em;cursor:pointer;
  transition:border-color .2s var(--curve),color .2s var(--curve),background-color .2s var(--curve);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle[aria-expanded="true"]{border-color:var(--cyan);color:var(--cyan);background:rgba(52,227,200,.12)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:10px;flex:0 0 auto}
.nav-toggle__bars::before,
.nav-toggle__bars::after{content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;transition:transform .24s var(--curve)}
.nav-toggle__bars::before{top:0}
.nav-toggle__bars::after{bottom:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4.25px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4.25px) rotate(-45deg)}
.nav-toggle__label{line-height:1}

/* ---------- 15. Footer ---------- */
.site-footer{
  margin-top:clamp(56px,9vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(15,47,74,.42) 0%,rgba(7,27,46,.98) 62%,#05141F 100%);
  padding:clamp(38px,6vw,72px) 0 26px;
}
.footer-inner{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:clamp(22px,3.4vw,48px)}

.footer-brand{max-width:32em}
.footer-brand__name{
  font-family:var(--font-display);font-size:22px;font-weight:900;letter-spacing:.1em;color:var(--white);
  padding-bottom:10px;margin-bottom:12px;border-bottom:1px solid var(--line);
}
.footer-brand__tagline{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--cyan);margin-bottom:12px}
.footer-brand__note{font-size:14px;line-height:1.8;color:var(--stone);max-width:30em;margin-bottom:18px}
.footer-copy{display:flex;flex-wrap:wrap;gap:8px}
.copy-btn{
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:var(--pill);
  background:rgba(15,47,74,.8);border:1px solid var(--line);color:var(--white);
  font-size:12.5px;letter-spacing:.06em;cursor:pointer;
  transition:border-color .2s var(--curve),color .2s var(--curve),background-color .2s var(--curve);
}
.copy-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.copy-btn[data-copied="true"]{border-color:var(--moss);color:#A6C0AA;background:rgba(111,143,115,.2)}
.copy-btn[data-copied="false"]{border-color:var(--clay);color:#D89C82}
.footer-status{min-height:1.4em;margin-top:10px;font-size:12.5px;letter-spacing:.05em;color:var(--stone)}

.footer-col__title{
  position:relative;
  font-family:var(--font-mono);font-size:12px;font-weight:400;letter-spacing:.16em;
  color:var(--stone);padding-left:14px;margin-bottom:14px;
}
.footer-col__title::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;background:var(--cyan)}
.footer-list{display:flex;flex-direction:column;gap:9px}
.footer-link{font-size:14.5px;color:var(--soft);letter-spacing:.02em}
.footer-link:hover{color:var(--cyan);text-decoration:none}

.footer-contact{margin-top:clamp(28px,4vw,48px);border-top:1px solid var(--line)}
.footer-contact__row{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 16px;
  padding:12px 0;border-bottom:1px solid rgba(29,76,110,.55);
}
.footer-contact__key{flex:0 0 auto;min-width:76px;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--stone)}
.footer-contact__val{font-size:15px;color:var(--white);word-break:break-word}

.footer-meta{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 24px;
  margin-top:18px;padding-top:16px;border-top:1px solid var(--line);
  font-size:12.5px;letter-spacing:.06em;color:var(--stone);
}
.footer-meta__item{margin:0;max-width:none}
.footer-meta__item--icp{color:var(--moss);font-family:var(--font-mono)}

/* ---------- 16. Reveal ---------- */
.has-js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .55s var(--curve),transform .55s var(--curve)}
.has-js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 17. Responsive ---------- */
@media (max-width:1180px){
  .nav__index{display:none}
}
@media (max-width:1080px){
  .header-actions .btn--ghost{display:none}
}
@media (max-width:980px){
  .nav{
    position:absolute;top:calc(100% + 10px);left:-1px;right:-1px;margin:0;
    padding:8px;background:rgba(9,30,49,.98);
    border:1px solid var(--line);border-radius:20px;
    box-shadow:0 20px 42px rgba(3,12,22,.62);
    opacity:0;visibility:hidden;transform:translateY(-8px);pointer-events:none;
    transition:opacity .22s var(--curve),transform .22s var(--curve),visibility .22s;
  }
  .nav[data-open]{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .nav__index{display:inline}
  .nav__link{padding:12px 14px;border-radius:14px;font-size:16px;border-color:rgba(29,76,110,.55)}
  .nav-toggle{display:inline-flex}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1;max-width:none}
  .grid--2,.grid--3,.grid--split,.grid--split-rev,.grid--rail,.doc-grid{grid-template-columns:minmax(0,1fr)}
  .shift-down{margin-top:0}
  .doc-nav{position:static}
  .figure__frame{aspect-ratio:4/3}
  .figure--tall .figure__frame{aspect-ratio:1/1}
}
@media (max-width:640px){
  :root{--header-space:78px}
  body{font-size:16px}
  .brand__tagline{display:none}
  .site-header__inner{padding:6px 6px 6px 12px;gap:8px}
  .btn--compact{padding:8px 12px;font-size:12.5px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:26px}
  .board{grid-template-columns:minmax(0,1fr)}
  .footer-meta{justify-content:flex-start}
}

/* ---------- 18. Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .has-js [data-reveal]{opacity:1;transform:none}
  .btn:hover{transform:none}
}