/* =========================================================
   速博网 · shared site kit  →  /assets/site.css
   夜间入口枢纽站：深海蓝底 / 堆叠面板 / 信号橙 + 荧光青
   ========================================================= */

/* ---------- 1. tokens ---------- */
:root{
  --deep:#0B1B2B;
  --night:#06111C;
  --panel:#102A44;
  --paper:#F2EBDD;
  --paper-dim:#CFC7B7;
  --signal:#FF6A2A;
  --cyan:#39E6D0;
  --amber:#FFC24B;
  --green:#5ED68A;
  --ink:#071018;

  --line-dark:rgba(207,199,183,.20);
  --line-strong:rgba(207,199,183,.42);
  --line-paper:rgba(7,16,24,.24);

  --font-display:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-serif:"Songti SC","Noto Serif SC",SimSun,Georgia,"Times New Roman",serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  --wrap:1240px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:76px;
  --radius:3px;
  --shadow-hard:10px 10px 0 rgba(3,10,18,.52);
  --shadow-soft:0 20px 54px rgba(2,8,16,.42);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 20px);
}
body{
  margin:0;
  background-color:var(--deep);
  background-image:
    radial-gradient(900px 520px at 86% -10%,rgba(57,230,208,.10),transparent 62%),
    radial-gradient(720px 420px at 0% 4%,rgba(255,106,42,.09),transparent 62%);
  background-repeat:no-repeat;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0}
table{border-collapse:collapse;width:100%}

:focus-visible{outline:3px solid var(--cyan);outline-offset:3px;border-radius:2px}
.panel--paper :focus-visible,
.footer-bar :focus-visible{outline-color:var(--signal)}

/* ---------- 3. typography ---------- */
.h1,.h2,.h3{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.06;
  letter-spacing:-.028em;
  text-wrap:balance;
}
.h1{font-size:clamp(38px,6vw,76px)}
.h2{font-size:clamp(26px,3.6vw,44px);line-height:1.12}
.h3{font-size:clamp(19px,2.2vw,26px);line-height:1.25;letter-spacing:-.015em}

.lead{
  font-size:clamp(15.5px,1.5vw,18px);
  line-height:1.78;
  color:rgba(242,235,221,.82);
  max-width:58ch;
}
.serif{font-family:var(--font-serif);letter-spacing:.015em}
.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.04em}

.prose{font-size:clamp(15.5px,1.05vw,17px);line-height:1.8}
.prose p{margin:0 0 1em}
.prose h2{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(21px,2.4vw,29px);line-height:1.25,;
  letter-spacing:-.018em;margin:1.7em 0 .55em;
}
.prose h3{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(17px,1.9vw,21px);margin:1.4em 0 .45em;
}
.prose ul,.prose ol{padding-left:1.15em;margin:0 0 1em}
.prose ul li{list-style:none;position:relative;margin:.4em 0}
.prose ul li::before{
  content:"";position:absolute;left:-1.05em;top:.72em;
  width:6px;height:6px;background:var(--signal);
}
.prose ol{list-style:decimal}
.prose li{margin:.4em 0}
.prose a{
  color:var(--signal);text-decoration:underline;
  text-decoration-thickness:2px;text-underline-offset:3px;
}
.panel--paper .prose a{color:#b23a00}

/* ---------- 4. layout utilities ---------- */
.wrap{
  width:100%;max-width:var(--wrap);
  margin-inline:auto;padding-inline:var(--gutter);
}
.wrap--narrow{max-width:880px}
.section{padding-block:clamp(40px,6vw,84px)}
.section--tight{padding-block:clamp(22px,3.4vw,44px)}
.rule{height:2px;border:0;margin:0;background:var(--line-dark)}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(14px,2vw,24px);
}
.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-12{grid-column:span 12}

/* ---------- 5. buttons & labels ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-display);font-weight:800;
  font-size:14px;letter-spacing:.02em;line-height:1;
  padding:12px 18px;
  border:2px solid transparent;border-radius:var(--radius);
  text-decoration:none;cursor:pointer;
  transition:transform .16s var(--ease),box-shadow .16s var(--ease),
             background-color .16s var(--ease),color .16s var(--ease),
             border-color .16s var(--ease);
}
.btn--sm{padding:9px 13px;font-size:12.5px}

.btn--signal{
  background:var(--signal);color:#180800;border-color:#180800;
  box-shadow:4px 4px 0 rgba(3,10,18,.62);
}
.btn--signal:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(3,10,18,.72)}
.btn--signal:active{transform:translate(1px,1px);box-shadow:2px 2px 0 rgba(3,10,18,.6)}

.btn--ghost{
  background:transparent;color:var(--paper);border-color:var(--line-strong);
}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}

.btn--paper{
  background:var(--paper);color:var(--ink);border-color:var(--ink);
  box-shadow:4px 4px 0 rgba(7,16,24,.3);
}
.btn--paper:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 rgba(7,16,24,.35)}

.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;
  letter-spacing:.22em;text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{content:"";width:22px;height:2px;background:currentColor}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 10px;
  font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.1em;line-height:1.4;
  border:2px solid currentColor;border-radius:2px;
  text-decoration:none;color:var(--cyan);
  background:rgba(57,230,208,.08);
  transition:background-color .16s var(--ease),transform .16s var(--ease);
}
.tag:hover{background:rgba(57,230,208,.18);transform:translateY(-1px)}
.tag--signal{color:var(--signal);background:rgba(255,106,42,.1)}
.tag--signal:hover{background:rgba(255,106,42,.2)}
.tag--amber{color:var(--amber);background:rgba(255,194,75,.1)}
.tag--amber:hover{background:rgba(255,194,75,.2)}
.tag--green{color:var(--green);background:rgba(94,214,138,.1)}
.tag--green:hover{background:rgba(94,214,138,.2)}
.tag--paper{color:var(--ink);border-color:rgba(7,16,24,.62);background:rgba(7,16,24,.05)}

.status-dot{
  display:inline-block;width:7px;height:7px;border-radius:50%;
  background:var(--green);box-shadow:0 0 0 3px rgba(94,214,138,.22);
  flex:0 0 auto;
}

/* ---------- 6. panels & crumbs ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:2px solid var(--line-dark);
  border-radius:var(--radius);
  box-shadow:var(--shadow-hard);
  padding:clamp(18px,3vw,32px);
  color:var(--paper);
}
.panel--flat{box-shadow:none}
.panel--paper{
  background:var(--paper);
  color:var(--ink);
  border-color:rgba(7,16,24,.86);
  box-shadow:10px 10px 0 rgba(3,10,18,.5);
}
.panel--paper :is(p,li,dd){color:rgba(7,16,24,.82)}
.panel--paper .h1,
.panel--paper .h2,
.panel--paper .h3{color:var(--ink)}

.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.1em;text-transform:uppercase;
  color:rgba(242,235,221,.52);
}
.crumbs a{color:rgba(242,235,221,.74);text-decoration:none}
.crumbs a:hover{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
.crumbs .sep{color:var(--signal)}
.crumbs [aria-current="page"]{color:var(--paper)}
.crumbs--paper{color:rgba(7,16,24,.5)}
.crumbs--paper a{color:rgba(7,16,24,.72)}
.crumbs--paper [aria-current="page"]{color:var(--ink)}

/* ---------- 7. media containers ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border:2px solid var(--line-strong);
  border-radius:var(--radius);
  box-shadow:8px 8px 0 rgba(3,10,18,.45);
  aspect-ratio:var(--media-ratio,16 / 9);
  background:
    radial-gradient(circle at 18% 20%,rgba(57,230,208,.20),transparent 58%),
    radial-gradient(circle at 82% 80%,rgba(255,106,42,.18),transparent 58%),
    linear-gradient(160deg,#0d2135,#06111c);
  isolation:isolate;
}
.media::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:2;
  background-image:
    linear-gradient(rgba(207,199,183,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(207,199,183,.07) 1px,transparent 1px);
  background-size:44px 44px;
}
.media img,
.media > svg,
.media > picture > img{
  display:block;width:100%;height:100%;object-fit:cover;
}
.media--wide{--media-ratio:21 / 9}
.media--tall{--media-ratio:4 / 5}
.media--square{--media-ratio:1 / 1}
.media__label{
  position:absolute;left:10px;bottom:10px;z-index:3;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--paper);
  background:rgba(6,17,28,.82);
  border:1px solid rgba(57,230,208,.5);
  padding:4px 8px;border-radius:2px;
}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);font-size:11.5px;
  letter-spacing:.05em;color:rgba(207,199,183,.72);
}

/* ---------- 8. header ---------- */
.skip-link{
  position:fixed;top:8px;left:8px;z-index:200;
  transform:translateY(-240%);
  background:var(--signal);color:#180800;
  font-family:var(--font-display);font-weight:800;font-size:13px;
  padding:10px 16px;border:2px solid #180800;border-radius:2px;
  text-decoration:none;
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:transparent;
  color:var(--paper);
  transition:background-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header[data-state="solid"]{
  background:var(--night);
  box-shadow:0 1px 0 var(--line-dark),0 16px 38px rgba(2,8,16,.55);
}

.header-inner{
  position:relative;
  width:100%;max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;
  gap:clamp(10px,2vw,26px);
}

/* brand */
.brand{
  display:inline-flex;align-items:center;gap:10px;
  flex:0 0 auto;text-decoration:none;color:inherit;
}
.brand-mark{
  position:relative;flex:0 0 auto;
  width:30px;height:30px;
  border:2px solid var(--cyan);border-radius:2px;
  background:rgba(57,230,208,.08);
}
.brand-mark::before{
  content:"";position:absolute;inset:6px;
  border:2px solid var(--signal);border-radius:50%;
}
.brand-mark::after{
  content:"";position:absolute;left:50%;top:50%;
  width:5px;height:5px;margin:-2.5px 0 0 -2.5px;
  background:var(--paper);border-radius:50%;
}
.brand-text{display:flex;flex-direction:column;line-height:1.08}
.brand-name{
  font-family:var(--font-display);font-weight:800;
  font-size:18px;letter-spacing:-.02em;color:var(--paper);
}
.brand-sub{
  margin-top:4px;
  font-family:var(--font-mono);font-size:9.5px;
  letter-spacing:.26em;text-transform:uppercase;
  color:rgba(242,235,221,.52);
}

/* nav */
.site-nav{flex:1 1 auto;display:flex;justify-content:center}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-item{list-style:none}
.nav-link{
  position:relative;display:block;
  padding:9px 12px;
  font-family:var(--font-display);font-weight:600;
  font-size:14.5px;letter-spacing:.02em;
  color:rgba(242,235,221,.78);
  text-decoration:none;
  border:2px solid transparent;border-radius:2px;
  transition:color .18s var(--ease),background-color .18s var(--ease),
             border-color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--signal);
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(57,230,208,.1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:#fff;
  background:rgba(255,106,42,.15);
  border-color:rgba(255,106,42,.6);
}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* tools */
.header-tools{
  display:flex;align-items:center;gap:10px;flex:0 0 auto;
}
.version-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;
  color:var(--cyan);
  border:2px solid rgba(57,230,208,.45);
  border-radius:2px;
  padding:5px 8px;
  background:rgba(57,230,208,.08);
  white-space:nowrap;
}
.version-chip::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 0 3px rgba(57,230,208,.18);
}

/* mobile toggle */
.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:8px 10px;
  border:2px solid var(--line-strong);border-radius:2px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{display:grid;gap:3px;width:16px}
.nav-toggle-bars span{
  display:block;height:2px;background:currentColor;border-radius:1px;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open="true"] .nav-toggle-bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open="true"] .nav-toggle-bars span:nth-child(2){opacity:0}
.site-header[data-open="true"] .nav-toggle-bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

/* progress */
.progress-rail{
  position:absolute;left:0;right:0;bottom:0;height:3px;
  background:rgba(207,199,183,.14);
  overflow:hidden;
}
.progress-bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan) 0%,var(--cyan) 40%,var(--signal) 100%);
  will-change:transform;
}

/* ---------- 9. footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(40px,6vw,90px);
  background:var(--night);
  background-image:
    radial-gradient(700px 320px at 88% 0%,rgba(57,230,208,.08),transparent 62%),
    radial-gradient(560px 280px at 4% 100%,rgba(255,106,42,.08),transparent 62%);
  background-repeat:no-repeat;
  border-top:3px solid var(--signal);
  color:var(--paper);
  padding-top:clamp(34px,5vw,64px);
}
.footer-inner{
  width:100%;max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer-top{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr .85fr 1.25fr;
  gap:clamp(20px,3vw,44px);
  padding-bottom:clamp(26px,4vw,44px);
  border-bottom:1px solid var(--line-dark);
  margin-bottom:clamp(14px,2vw,20px);
}
.footer-brand{display:flex;flex-direction:column;gap:14px}
.brand--footer .brand-name{font-size:19px}
.brand--footer .brand-sub{letter-spacing:.14em}
.footer-tagline{
  max-width:22ch;
  font-family:var(--font-serif);
  font-size:15px;line-height:1.7;
  color:rgba(242,235,221,.68);
  padding-left:12px;
  border-left:2px solid rgba(255,106,42,.65);
}
.footer-col{display:flex;flex-direction:column;min-width:0}
.footer-col-title{
  display:flex;align-items:center;gap:8px;
  margin-bottom:14px;
  font-family:var(--font-mono);font-weight:400;
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--cyan);
}
.footer-col-title::before{content:"";width:14px;height:2px;background:var(--signal)}

.footer-links{display:grid;gap:9px}
.footer-links a{
  display:inline-flex;align-items:center;gap:7px;
  font-size:14px;text-decoration:none;
  color:rgba(242,235,221,.74);
  border-bottom:1px solid transparent;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.footer-links a::before{
  content:"›";
  font-family:var(--font-mono);font-size:13px;
  color:var(--signal);line-height:1;
}
.footer-links a:hover{color:var(--paper);border-bottom-color:var(--cyan)}

.footer-contact{display:grid;gap:10px}
.footer-contact li{
  display:grid;grid-template-columns:auto 1fr;
  gap:10px;align-items:baseline;
  font-size:13.5px;line-height:1.65;
  color:rgba(242,235,221,.74);
  word-break:break-word;
}
.contact-key{
  font-family:var(--font-mono);font-size:10px;
  letter-spacing:.16em;text-transform:uppercase;
  color:rgba(57,230,208,.8);
  border:1px solid rgba(57,230,208,.35);
  padding:1px 5px;border-radius:2px;
  white-space:nowrap;
}
.footer-note{
  margin-top:14px;
  padding-left:10px;
  border-left:2px solid rgba(255,194,75,.6);
  font-size:12.5px;line-height:1.65;
  color:rgba(242,235,221,.5);
}

.footer-bar{
  display:flex;flex-wrap:wrap;align-items:center;
  gap:8px 18px;
  padding-bottom:clamp(18px,2.4vw,26px);
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.05em;
  color:rgba(242,235,221,.55);
}
.footer-bar > span+span::before{
  content:"/";
  margin-right:16px;
  color:rgba(207,199,183,.3);
}
.footer-bar-year{color:rgba(242,235,221,.72)}
.footer-bar-version{color:rgba(57,230,208,.85)}
.footer-bar-icp{color:rgba(242,235,221,.55)}
.footer-bar-domain{color:rgba(207,199,183,.5)}

/* ---------- 10. reveal ---------- */
html[data-js="on"] [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html[data-js="on"] [data-reveal="in"]{opacity:1;transform:none}

/* ---------- 11. responsive ---------- */
@media (max-width:1180px){
  .nav-link{padding:9px 9px;font-size:13.5px}
  .brand-sub{display:none}
}
@media (max-width:1100px){
  :root{--header-h:68px}
}
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    left:0;right:0;top:100%;
    display:block;
    margin:0;
    background:var(--night);
    border-top:1px solid var(--line-dark);
    border-bottom:3px solid var(--signal);
    box-shadow:0 24px 44px rgba(2,8,16,.62);
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    transition:max-height .3s var(--ease),visibility 0s linear .3s;
  }
  .site-header[data-open="true"] .site-nav{
    max-height:min(76vh,620px);
    overflow-y:auto;
    visibility:visible;
    transition:max-height .34s var(--ease),visibility 0s linear 0s;
  }
  .nav-list{flex-direction:column;align-items:stretch;gap:0;padding:6px 0 10px}
  .nav-item{border-bottom:1px solid rgba(207,199,183,.12)}
  .nav-item:last-child{border-bottom:0}
  .nav-link{
    padding:14px var(--gutter);
    font-size:15px;
    border:0;border-radius:0;
  }
  .nav-link::after{display:none}
  .nav-link:hover{background:rgba(57,230,208,.1)}
  .nav-link[aria-current="page"]{
    background:rgba(255,106,42,.16);
    box-shadow:inset 3px 0 0 var(--signal);
    border-color:transparent;
  }

  .grid{gap:14px}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}

  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-col--contact{grid-column:1 / -1}
}
@media (max-width:560px){
  :root{--header-h:62px}
  .brand-mark{width:26px;height:26px}
  .brand-mark::before{inset:5px}
  .brand-name{font-size:16px}
  .header-inner{gap:8px}
  .header-tools{gap:8px}
  .version-chip{font-size:10.5px;padding:4px 6px;letter-spacing:.02em}
  .version-chip::before{width:5px;height:5px;box-shadow:none}
  .header-cta{padding:8px 10px;font-size:11.5px;box-shadow:3px 3px 0 rgba(3,10,18,.62)}
  .nav-toggle{padding:7px 8px;letter-spacing:.1em}
  .nav-toggle-text{display:none}
  .footer-top{grid-template-columns:1fr;gap:26px}
  .footer-bar{font-size:11px;gap:6px 12px}
  .footer-bar > span+span::before{margin-right:10px}
  .panel{padding:18px}
  .panel--paper{box-shadow:6px 6px 0 rgba(3,10,18,.5)}
}

/* ---------- 12. 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;
  }
  html[data-js="on"] [data-reveal]{opacity:1;transform:none}
  .progress-bar{transition:none}
}