/* =========================================================
   site.css — 辉煌官网共享层
   1 reset 2 tokens 3 base 4 typography 5 layout 6 components
   7 header 8 footer 9 responsive 10 reduced-motion
   ========================================================= */

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

/* 2 tokens */
:root{
  --ink-900:#101A3A;
  --ink-800:#18244C;
  --ink-700:#0C1430;
  --ink-600:#3B3F5E;
  --paper:#F2ECE1;
  --paper-ink:#1C2136;
  --cyan:#38E0D0;
  --orange:#FF7A45;
  --amber:#E0B24C;
  --green:#69D9A4;
  --white:#F7F8FC;
  --fog:#C7CEE4;
  --muted:#8E97B8;
  --line:rgba(199,206,228,.16);
  --line-strong:rgba(199,206,228,.34);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --shell-max:1440px;
  --shell-pad:6vw;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* 3 base */
html,body{min-height:100%}
body{
  background-color:var(--ink-900);
  background-image:radial-gradient(rgba(199,206,228,.075) 1px,transparent 1px);
  background-size:32px 32px;
  color:var(--fog);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
main{display:block}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
::selection{background:var(--cyan);color:var(--ink-900)}

/* 4 typography */
h1{font-size:clamp(30px,5.2vw,64px);line-height:1.12;font-weight:900;letter-spacing:-.02em;color:var(--white)}
h2{font-size:clamp(24px,3.2vw,40px);line-height:1.2;font-weight:900;letter-spacing:-.01em;color:var(--white)}
h3{font-size:clamp(18px,2vw,22px);line-height:1.35;font-weight:700;color:var(--white)}
h4{font-size:16px;line-height:1.5;font-weight:700;color:var(--fog)}
strong,b{font-weight:700;color:var(--white)}

/* 5 layout */
.shell{width:100%;max-width:var(--shell-max);margin:0 auto;padding-left:var(--shell-pad);padding-right:var(--shell-pad)}
.section{padding:clamp(40px,6vw,88px) 0}
.section--tight{padding:clamp(24px,3vw,44px) 0}
.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:28px}
.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}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.2em;color:var(--amber)}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;opacity:.75}
.rule{height:1px;background:var(--line);width:100%}
.prose{max-width:38em;font-size:16px;line-height:1.75}
.prose p+p{margin-top:1.05em}
.lead{font-size:20px;line-height:1.65;font-weight:500;color:var(--white);max-width:30em}
.note{font-size:13px;line-height:1.7;color:var(--muted)}
.mono{font-family:var(--font-mono)}
.num{font-family:var(--font-mono);font-weight:600;letter-spacing:.02em}
.indent-2{display:block;padding-left:2.2em}
.link{color:var(--fog);background-image:linear-gradient(var(--cyan),var(--cyan));background-repeat:no-repeat;background-position:0 100%;background-size:0% 1px;transition:background-size 160ms var(--ease),color 160ms var(--ease)}
.link:hover{background-size:100% 1px;color:var(--orange)}

/* 6 components */
.skip-link{position:absolute;left:20px;top:-72px;z-index:200;padding:10px 18px;background:var(--cyan);color:var(--ink-900);font-size:13px;font-weight:700;transition:top 160ms var(--ease)}
.skip-link:focus{top:14px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px;border:1px solid var(--cyan);background:transparent;color:var(--cyan);font-size:14px;font-weight:600;letter-spacing:.04em;transition:background-color 160ms var(--ease),color 160ms var(--ease),border-color 160ms var(--ease),transform 160ms var(--ease)}
.btn:hover{background:var(--cyan);color:var(--ink-900)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--orange);border-color:var(--orange);color:#1A0F08}
.btn--primary:hover{background:transparent;color:var(--orange)}
.btn--ghost{border-color:var(--line-strong);color:var(--fog)}
.btn--ghost:hover{border-color:var(--cyan);background:transparent;color:var(--cyan)}
.btn--sm{padding:9px 16px;font-size:12.5px}

.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border:1px solid var(--line-strong);color:var(--fog);font-family:var(--font-mono);font-size:11px;letter-spacing:.08em}
.tag--ok{color:var(--green);border-color:rgba(105,217,164,.45)}
.tag--warn{color:var(--amber);border-color:rgba(224,178,76,.45)}
.tag--alert{color:var(--orange);border-color:rgba(255,122,69,.45)}

.panel{position:relative;background:var(--ink-800);border:1px solid var(--line);padding:24px;transition:border-color 160ms var(--ease),transform 160ms var(--ease),box-shadow 160ms var(--ease)}
.panel:hover{border-color:var(--cyan);transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,0,0,.28)}
.panel--paper{background:var(--paper);color:var(--paper-ink);border-color:#DCD3C2}
.panel--paper h3,.panel--paper strong{color:var(--paper-ink)}
.panel--flat{background:transparent}
.panel--flat:hover{transform:none;box-shadow:none}

.index-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 32px;font-size:13px;line-height:1.5}
.index-list li{border-bottom:1px solid var(--line)}
.index-list a{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:8px 0;color:var(--fog);transition:color 160ms var(--ease)}
.index-list a:hover{color:var(--cyan)}
.index-list .num{font-size:11.5px;color:var(--muted)}

.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--muted)}
.crumbs a{color:var(--fog)}
.crumbs a:hover{color:var(--cyan)}
.crumbs__sep{color:var(--ink-600)}
.crumbs [aria-current="page"]{color:var(--cyan)}

.figure{position:relative;overflow:hidden;border:1px solid var(--line);background:var(--ink-800)}
.figure img{width:100%;height:100%;object-fit:cover}
.figure--16x9{aspect-ratio:16/9}
.figure--4x3{aspect-ratio:4/3}
.figure--1x1{aspect-ratio:1/1}
.figure--tall{aspect-ratio:3/4}
.figure__frame::after{content:"";position:absolute;inset:8px;border:1px solid rgba(56,224,208,.35);pointer-events:none}
.figure__cap{margin-top:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted)}

.toc{position:sticky;top:148px;display:grid;gap:10px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em}
.toc a{padding-left:12px;border-left:2px solid transparent;color:var(--muted);transition:color 160ms var(--ease),border-color 160ms var(--ease)}
.toc a:hover{color:var(--fog)}
.toc a[aria-current="true"]{color:var(--white);border-left-color:var(--amber)}

/* 7 header */
.site-header{position:sticky;top:0;z-index:80;background:var(--ink-900);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(0,0,0,.4)}
.site-header[data-open="true"]{background:var(--ink-700)}

.status-bar{background:var(--ink-700);border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--muted)}
.status-bar__inner{max-width:var(--shell-max);margin:0 auto;padding:0 var(--shell-pad);display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;min-height:36px}
.status-bar__code{color:var(--fog);letter-spacing:.18em;white-space:nowrap}
.status-bar__code b{color:var(--amber);font-weight:600}
.status-bar__signals{display:flex;flex-wrap:wrap;gap:6px 18px}
.signal{display:inline-flex;align-items:center;gap:7px}
.signal__dot{width:7px;height:7px;border-radius:50%;background:var(--green);flex:none}
.signal__dot--ok{background:var(--green);animation:breathe 4s ease-in-out infinite}
.signal__dot--warn{background:var(--amber)}
.signal__dot--down{background:var(--orange)}
.signal__label{white-space:nowrap}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.32}}
.status-bar__toggle{margin-left:auto;display:inline-flex;align-items:center;gap:8px;padding:9px 0;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--fog);transition:color 160ms var(--ease)}
.status-bar__toggle:hover{color:var(--cyan)}
.status-bar__chev{width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform 160ms var(--ease)}
.status-bar[data-open="true"] .status-bar__chev{transform:rotate(-135deg) translateY(-2px)}
.status-bar__detail{display:none;flex:1 0 100%;border-top:1px dashed var(--line)}
.status-bar[data-open="true"] .status-bar__detail{display:block}
.status-bar__detail p{max-width:76ch;padding:12px 0 14px;font-family:var(--font-sans);font-size:12.5px;line-height:1.7;letter-spacing:.02em;color:var(--fog)}

.brand-line{max-width:var(--shell-max);margin:0 auto;padding:16px var(--shell-pad) 12px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px}
.brand{display:inline-flex;align-items:baseline;gap:10px;font-size:clamp(20px,2.4vw,24px);font-weight:900;letter-spacing:.01em;color:var(--white);transition:color 160ms var(--ease)}
.brand:hover{color:var(--cyan)}
.brand__code{font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.22em;color:var(--amber)}
.brand-line__tagline{padding-left:20px;border-left:1px solid var(--line);font-size:13px;line-height:1.5;color:var(--muted)}
.brand-line__utils{margin-left:auto;display:flex;align-items:center;gap:18px;font-family:var(--font-mono);font-size:12px}
.util{color:var(--fog)}
.util--count{color:var(--muted);white-space:nowrap}
.util--count b{color:var(--amber);font-weight:600}
.nav-toggle{display:none;align-items:center;gap:9px;padding:8px 14px;border:1px solid var(--line-strong);color:var(--fog);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;transition:border-color 160ms var(--ease),color 160ms var(--ease)}
.nav-toggle::before{content:"";width:14px;height:1px;background:currentColor;box-shadow:0 -4px 0 currentColor,0 4px 0 currentColor}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}

.site-nav{max-width:var(--shell-max);margin:0 auto;padding:0 var(--shell-pad)}
.site-nav__list{display:flex;flex-wrap:wrap;border-top:1px solid var(--line)}
.site-nav__item{display:flex}
.site-nav__link{position:relative;display:flex;flex-direction:column;gap:3px;padding:12px 22px 14px;border-right:1px solid var(--line);color:var(--fog);transition:color 160ms var(--ease),background-color 160ms var(--ease)}
.site-nav__item:first-child .site-nav__link{border-left:1px solid var(--line)}
.site-nav__link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--cyan);transform:scaleX(0);transform-origin:0 50%;transition:transform 160ms var(--ease),background-color 160ms var(--ease)}
.site-nav__link:hover{color:var(--white);background:rgba(56,224,208,.05)}
.site-nav__link:hover::after{transform:scaleX(1);background:var(--orange)}
.site-nav__link:focus-visible{outline:2px solid var(--cyan);outline-offset:-2px}
.site-nav__code{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;color:var(--muted)}
.site-nav__label{font-size:15px;font-weight:700}
.site-nav__link[aria-current="page"]{color:var(--white);background:rgba(56,224,208,.07)}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan)}
.site-nav__link[aria-current="page"] .site-nav__code{color:var(--amber)}

.site-header[data-scrolled="true"] .brand-line{padding-top:10px;padding-bottom:8px}
.site-header[data-scrolled="true"] .brand-line__tagline{display:none}
.site-header[data-scrolled="true"] .site-nav__code{display:none}
.site-header[data-scrolled="true"] .site-nav__link{padding-top:10px;padding-bottom:10px}

.scroll-progress{height:2px;background:rgba(199,206,228,.12)}
.scroll-progress span{display:block;height:100%;width:0;background:var(--cyan);transition:width 120ms linear}

/* 8 footer */
.site-footer{margin-top:96px;background:var(--ink-700);border-top:1px solid var(--line);color:var(--fog)}
.footer__inner{max-width:var(--shell-max);margin:0 auto;padding:56px var(--shell-pad) 40px;display:grid;grid-template-columns:minmax(240px,1fr) 1.7fr;gap:48px 64px}
.footer__logo{display:flex;align-items:baseline;gap:10px;font-size:22px;font-weight:900;letter-spacing:.01em;color:var(--white)}
.footer__logo-code{font-family:var(--font-mono);font-size:10px;font-weight:600;letter-spacing:.22em;color:var(--amber)}
.footer__desc{margin-top:14px;max-width:34em;font-size:13.5px;line-height:1.75;color:var(--muted)}
.footer__contact{margin-top:20px;display:grid;gap:10px;font-size:13px}
.footer__contact li{display:flex;gap:12px;align-items:flex-start;color:var(--fog)}
.footer__k{flex:none;width:48px;padding-top:3px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.16em;color:var(--amber)}
.footer__cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.footer__col-title{margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid var(--line);font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.2em;color:var(--muted)}
.footer__list{display:grid;gap:10px;font-size:14px}
.footer__list a{color:var(--fog);background-image:linear-gradient(var(--cyan),var(--cyan));background-repeat:no-repeat;background-position:0 100%;background-size:0% 1px;transition:background-size 160ms var(--ease),color 160ms var(--ease)}
.footer__list a:hover{background-size:100% 1px;color:var(--orange)}
.footer__toggle{display:none}
.footer__legal{border-top:1px solid var(--line)}
.footer__legal-inner{max-width:var(--shell-max);margin:0 auto;padding:18px var(--shell-pad);display:flex;flex-wrap:wrap;gap:6px 16px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.04em;color:var(--muted)}
.footer__legal-inner span{display:inline-flex}
.footer__note{max-width:var(--shell-max);margin:0 auto;padding:0 var(--shell-pad) 30px;font-size:12.5px;line-height:1.7;color:var(--muted)}

/* 9 responsive */
@media (max-width:1100px){
  .footer__inner{grid-template-columns:1fr;gap:40px}
  .brand-line__tagline{display:none}
}
@media (max-width:880px){
  :root{--shell-pad:20px}
  .grid-12{gap:20px}
  .col-4,.col-5,.col-6,.col-7,.col-8{grid-column:span 12}
  .toc{position:static;display:flex;flex-wrap:wrap;gap:10px 18px}

  .status-bar__signals{gap:4px 12px;font-size:10.5px}
  .signal__label{font-size:10.5px}
  .status-bar__toggle{margin-left:0}
  .status-bar__code{font-size:10.5px}

  .brand-line{padding:14px 20px 10px;gap:8px 14px}
  .brand-line__utils{margin-left:auto;gap:12px}
  .nav-toggle{display:inline-flex}

  .site-nav{display:none;padding:0;background:var(--ink-700);border-top:1px solid var(--line)}
  .site-header[data-open="true"] .site-nav{display:block}
  .site-nav__list{flex-direction:column;flex-wrap:nowrap;border-top:0}
  .site-nav__item{width:100%}
  .site-nav__link{width:100%;flex-direction:row;align-items:baseline;gap:14px;padding:14px 20px;border-right:0;border-left:0;border-bottom:1px solid var(--line)}
  .site-nav__item:first-child .site-nav__link{border-left:0}
  .site-nav__link::after{left:auto;right:0;top:0;bottom:0;width:2px;height:auto;transform:scaleY(0);transform-origin:50% 0}
  .site-nav__link:hover::after,.site-nav__link[aria-current="page"]::after{transform:scaleY(1)}
  .site-header[data-scrolled="true"] .site-nav__code{display:inline}

  .footer__inner{grid-template-columns:1fr;gap:28px;padding:40px 20px 22px}
  .footer__contact li{flex-direction:column;gap:2px}
  .footer__k{width:auto;padding-top:0}
  .site-footer[data-footer-ready] .footer__cols{display:none}
  .site-footer[data-footer-ready][data-footer-open="true"] .footer__cols{display:grid;grid-template-columns:1fr;gap:26px}
  .footer__toggle{display:flex;position:sticky;bottom:0;z-index:20;width:100%;align-items:center;justify-content:space-between;gap:12px;padding:14px 20px;background:var(--ink-800);border-top:1px solid var(--line);font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--fog)}
  .footer__toggle b{font-weight:600;color:var(--amber)}
  .footer__toggle[aria-expanded="true"]{border-bottom:1px solid var(--line)}
  .footer__legal-inner{font-size:11px;gap:5px 12px}
  .site-footer{margin-top:64px}
}
@media (max-width:560px){
  .index-list{grid-template-columns:1fr}
  .lead{font-size:18px}
  .panel{padding:18px}
}

/* 10 reveal + reduced motion */
[data-js="on"] [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
[data-js="on"] [data-reveal].is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .signal__dot--ok{animation:none}
  .panel:hover{transform:none}
  [data-js="on"] [data-reveal]{opacity:1;transform:none}
  .scroll-progress span{transition:none}
}