/* ============================================================
   皇冠看台 · 全站共享样式 /assets/site.css
   1 reset  2 tokens  3 base type  4 layout  5 components
   6 header  7 footer  8 motion
   ============================================================ */

/* ---------- 1. reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,h6,p,ul,ol,li,figure,figcaption,blockquote,dl,dt,dd{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px}

/* ---------- 2. tokens ---------- */
:root{
  --ink:#0B1437;
  --ink-2:#111C4E;
  --char:#16181D;
  --gold:#D8A84E;
  --gold-bright:#F2D27A;
  --cyan:#38E0D0;
  --cyan-mist:#9CF3EA;
  --crimson:#7A1F2B;
  --ivory:#F4F0E6;
  --slate:#8C9BC4;

  --line:rgba(140,155,196,.22);
  --line-gold:rgba(216,168,78,.42);
  --line-cyanish:rgba(56,224,208,.34);

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

  --wrap:1280px;
  --gutter:clamp(16px,4vw,48px);
  --cut:18px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 3. base type ---------- */
body{
  font-family:var(--font-body);
  font-size:clamp(15px,.35vw + 14px,17px);
  font-weight:400;
  line-height:1.75;
  color:var(--ivory);
  background-color:var(--ink);
  background-image:
    radial-gradient(1100px 560px at 84% -8%,rgba(56,224,208,.11),transparent 62%),
    radial-gradient(900px 520px at 2% 2%,rgba(216,168,78,.10),transparent 64%),
    linear-gradient(180deg,#0B1437 0%,#0A1230 58%,#0B1437 100%);
  background-attachment:fixed;
  min-height:100vh;
  overflow-x:hidden;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.02;letter-spacing:-.02em}
h1{font-size:clamp(2.6rem,7vw,6.4rem)}
h2{font-size:clamp(2rem,4.2vw,3.4rem)}
h3{font-size:clamp(1.35rem,2.2vw,1.85rem);line-height:1.16}
h4{font-size:clamp(1.05rem,1.4vw,1.25rem);line-height:1.24;font-weight:700}
strong{font-weight:700;color:var(--gold-bright)}
::selection{background:var(--gold);color:var(--ink)}

.mono{font-family:var(--font-mono);font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:.02em}
.eyebrow{
  font-family:var(--font-mono);font-size:.72rem;font-weight:600;
  letter-spacing:.26em;text-transform:uppercase;color:var(--cyan);
}
.tag{
  display:inline-flex;align-items:center;gap:.4em;
  padding:.22em .7em;border:1px solid var(--line-cyanish);
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;
  letter-spacing:.14em;color:var(--cyan-mist);
  background:rgba(56,224,208,.08);
  clip-path:polygon(0 0,calc(100% - 8px) 0,100% 8px,100% 100%,0 100%);
}
.tag--gold{border-color:var(--line-gold);color:var(--gold-bright);background:rgba(216,168,78,.12)}
.tag--crimson{border-color:rgba(122,31,43,.9);color:#F0C9CE;background:rgba(122,31,43,.42)}

/* ---------- 4. layout ---------- */
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:clamp(40px,6vw,86px)}
.section__head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:12px 28px;margin-bottom:clamp(18px,2.6vw,34px)}
.rule{height:1px;border:0;background:linear-gradient(90deg,var(--line-gold),rgba(140,155,196,.18) 55%,transparent)}
.layout-rail{
  display:grid;
  grid-template-columns:minmax(0,3fr) minmax(0,9fr);
  gap:clamp(20px,3vw,52px);
  align-items:start;
}
.prose{max-width:72ch}
.prose p + p{margin-top:1em}
.prose p{color:rgba(244,240,230,.86)}
.prose h3{margin-top:1.6em;margin-bottom:.5em}

/* ---------- 5. components ---------- */
.skip-link{
  position:absolute;left:12px;top:-80px;z-index:120;
  padding:.7em 1.1em;background:var(--gold);color:var(--ink);
  font-weight:700;font-size:.9rem;letter-spacing:.06em;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
  transition:top .18s var(--ease);
}
.skip-link:focus,.skip-link:focus-visible{top:12px;outline:none;box-shadow:inset 0 0 0 2px var(--ink)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  padding:.72em 1.2em;border:1px solid var(--line-gold);
  font-family:var(--font-body);font-size:.92rem;font-weight:700;letter-spacing:.04em;
  color:var(--ivory);background:rgba(216,168,78,.06);
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,12px 100%,0 calc(100% - 12px));
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.btn:hover{background:rgba(216,168,78,.2);border-color:var(--gold-bright);color:var(--gold-bright)}
.btn:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--cyan-mist)}
.btn--gold{background:var(--gold);color:#191204;border-color:var(--gold-bright)}
.btn--gold:hover{background:var(--gold-bright);color:#191204}
.btn--ghost{background:transparent;border-color:var(--line-cyanish);color:var(--cyan-mist)}
.btn--ghost:hover{background:rgba(56,224,208,.12);border-color:var(--cyan)}
.btn--sm{padding:.5em .9em;font-size:.82rem}

.panel{
  position:relative;
  padding:clamp(16px,2.2vw,30px);
  background:linear-gradient(158deg,var(--ink-2) 0%,#0D1740 62%,#0B1437 100%);
  border:1px solid var(--line);
}
.panel--crimson{background:linear-gradient(158deg,rgba(122,31,43,.55),#101A44 70%);border-color:rgba(122,31,43,.7)}
.cut{clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,0 100%)}

.stat{display:grid;gap:.15em}
.stat__value{font-family:var(--font-mono);font-weight:700;font-size:clamp(1.7rem,3.4vw,2.6rem);line-height:1;color:var(--cyan);letter-spacing:-.01em}
.stat__label{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;text-transform:uppercase;color:var(--slate)}

.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:.5em;font-family:var(--font-mono);font-size:.74rem;letter-spacing:.14em;color:var(--slate)}
.breadcrumb__link{color:var(--slate)}
.breadcrumb__link:hover{color:var(--cyan)}
.breadcrumb__sep{color:rgba(140,155,196,.5)}
.breadcrumb__current{color:var(--gold-bright)}

.media-frame{
  position:relative;overflow:hidden;aspect-ratio:16/9;
  border:1px solid var(--line);
  background:
    radial-gradient(560px 260px at 22% 12%,rgba(56,224,208,.16),transparent 70%),
    linear-gradient(148deg,#111C4E,#0A1230);
  clip-path:polygon(0 0,calc(100% - 22px) 0,100% 22px,100% 100%,0 100%);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame__tag{position:absolute;left:0;top:0;padding:.35em .8em;background:var(--gold);color:#191204;font-family:var(--font-mono);font-size:.68rem;font-weight:700;letter-spacing:.16em}
.media-frame__caption{margin-top:.7em;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.1em;color:var(--slate)}

/* ---------- 6. header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(11,20,55,.98) 0%,rgba(11,20,55,.93) 62%,rgba(11,20,55,.9) 100%);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.scroll-progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;z-index:3;background:linear-gradient(90deg,var(--cyan),var(--gold-bright));box-shadow:0 0 10px rgba(56,224,208,.55)}
.masthead__inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(10px,1.5vw,16px) var(--gutter);
  display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);
  align-items:center;gap:clamp(12px,2vw,28px);
}
.masthead__index{
  justify-self:start;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--slate);white-space:nowrap;
}
.masthead__index .mono{color:var(--gold)}
.masthead__brand{justify-self:center;display:inline-flex;align-items:center;gap:clamp(.5em,1.4vw,.95em)}
.masthead__pulse{
  position:relative;flex:none;overflow:hidden;
  width:clamp(26px,5vw,62px);height:2px;
  background:linear-gradient(90deg,rgba(216,168,78,0),rgba(216,168,78,.4));
}
.masthead__pulse::after{
  content:"";position:absolute;left:0;top:0;bottom:0;width:42%;
  background:linear-gradient(90deg,transparent,var(--cyan) 45%,var(--gold-bright));
  animation:pulse-run 9s linear infinite;
}
.masthead__lockup{display:block}
.masthead__name{
  display:block;font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.22rem,3vw,1.85rem);line-height:1;letter-spacing:.04em;color:var(--ivory);
}
.masthead__latin{
  display:block;margin-top:.35em;
  font-family:var(--font-mono);font-size:.58rem;font-weight:600;
  letter-spacing:.34em;color:var(--gold);
}
.masthead__meta{justify-self:end;display:flex;align-items:center;gap:clamp(.5em,1.2vw,.9em)}
.masthead__badge{
  display:inline-flex;align-items:center;gap:.45em;
  padding:.3em .7em;border:1px solid var(--line-cyanish);
  font-family:var(--font-mono);font-size:.66rem;font-weight:600;letter-spacing:.14em;
  color:var(--cyan-mist);background:rgba(56,224,208,.08);white-space:nowrap;
}
.masthead__badge-dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
.masthead__mail{
  font-size:.8rem;font-weight:600;letter-spacing:.08em;color:var(--slate);
  border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease);
}
.masthead__mail:hover{color:var(--gold-bright);border-bottom-color:var(--line-gold)}
.nav-toggle{display:none}

.site-nav{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(22,24,29,.5),rgba(11,20,55,0));
}
.site-nav__list{
  display:flex;flex-wrap:wrap;justify-content:center;align-items:center;
  gap:clamp(10px,2.2vw,34px);
  padding:.55em var(--gutter) .75em;
  max-width:var(--wrap);margin-inline:auto;
}
.site-nav__link{
  position:relative;display:inline-block;padding:.5em .15em;
  font-size:.94rem;font-weight:500;letter-spacing:.1em;color:var(--slate);
  transition:color .18s var(--ease);
}
.site-nav__link::after{
  content:"";position:absolute;left:0;right:0;bottom:.12em;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--gold-bright));
  transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease);
}
.site-nav__link:hover,.site-nav__link:focus-visible{color:var(--ivory)}
.site-nav__link:hover::after,.site-nav__link:focus-visible::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]{color:var(--gold-bright);font-weight:700}
.site-nav__link[aria-current="page"]::after{transform:scaleX(1)}
.site-nav__link[aria-current="page"]::before{
  content:"";position:absolute;left:50%;top:-1px;transform:translateX(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 9px rgba(56,224,208,.9);
}

/* ---------- 7. footer ---------- */
.site-footer{
  position:relative;margin-top:clamp(48px,8vw,110px);
  color:var(--ivory);background-color:var(--char);
  background-image:
    repeating-linear-gradient(90deg,rgba(140,155,196,.055) 0 1px,transparent 1px 92px),
    linear-gradient(180deg,#15171C 0%,#16181D 55%,#101217 100%);
  border-top:1px solid var(--line-gold);
}
.footer-scan{
  height:2px;
  background:linear-gradient(90deg,var(--gold) 0%,var(--gold-bright) 18%,var(--cyan) 46%,rgba(56,224,208,0) 82%,var(--crimson) 100%);
  opacity:.8;
}
.footer-inner{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(30px,4.4vw,58px) var(--gutter) clamp(20px,3vw,36px);
  display:grid;gap:clamp(22px,3vw,44px);
  grid-template-columns:minmax(0,1.45fr) repeat(3,minmax(0,1fr));
  border-bottom:1px solid rgba(140,155,196,.14);
}
.footer-brand__name{font-family:var(--font-display);font-weight:900;font-size:clamp(1.5rem,2.6vw,2rem);letter-spacing:.04em;line-height:1}
.footer-brand__latin{margin-top:.4em;font-family:var(--font-mono);font-size:.6rem;letter-spacing:.36em;color:var(--gold)}
.footer-brand__note{margin-top:1em;max-width:30ch;font-size:.9rem;line-height:1.72;color:rgba(244,240,230,.66)}
.footer-brand .btn{margin-top:1.2em}
.footer-col__title{
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.24em;text-transform:uppercase;color:var(--cyan);
  padding-bottom:.7em;margin-bottom:.9em;
  border-bottom:1px solid rgba(56,224,208,.22);
}
.footer-list{display:grid;gap:.55em}
.footer-list__link{
  display:inline-block;font-size:.9rem;color:rgba(244,240,230,.78);
  border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-list__link:hover,.footer-list__link:focus-visible{color:var(--gold-bright);border-bottom-color:var(--line-gold)}
.footer-contact{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(18px,2.6vw,30px) var(--gutter);
  border-bottom:1px solid rgba(140,155,196,.14);
}
.footer-contact__title{
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.24em;
  text-transform:uppercase;color:var(--slate);margin-bottom:1em;
}
.footer-contact__grid{display:grid;gap:.6em;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.footer-contact__row{display:flex;flex-wrap:wrap;align-items:baseline;gap:.7em;font-family:var(--font-mono);font-size:.82rem}
.footer-contact__key{color:var(--gold);letter-spacing:.18em;font-size:.68rem}
.footer-contact__val{color:var(--ivory);word-break:break-word}
.footer-note{margin-top:1em;max-width:66ch;font-size:.8rem;line-height:1.7;color:var(--slate)}
.footer-legal{
  width:100%;max-width:var(--wrap);margin-inline:auto;
  padding:clamp(14px,2vw,22px) var(--gutter) clamp(22px,3vw,34px);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 26px;
}
.footer-legal__links{display:flex;flex-wrap:wrap;gap:1.3em}
.footer-legal__link{font-size:.78rem;letter-spacing:.08em;color:rgba(140,155,196,.9)}
.footer-legal__link:hover,.footer-legal__link:focus-visible{color:var(--gold-bright)}
.footer-legal__meta{font-size:.74rem;letter-spacing:.06em;color:rgba(140,155,196,.72)}
.footer-legal__meta .mono{color:rgba(216,168,78,.85)}

/* ---------- 8. motion & interaction utilities ---------- */
[data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .52s var(--ease),transform .52s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}
[data-filter-item]{transition:opacity .16s var(--ease),transform .16s var(--ease)}
[data-filter-item].is-out{opacity:0;transform:translateY(6px)}

.to-top{
  position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:70;
  display:inline-flex;align-items:center;gap:.5em;
  padding:.55em .85em;border:1px solid var(--line-gold);
  background:rgba(17,28,78,.94);color:var(--gold-bright);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
  clip-path:polygon(0 0,calc(100% - 12px) 0,100% 12px,100% 100%,0 100%);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--ivory);border-color:var(--cyan)}
.to-top:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--cyan-mist)}
.to-top__arrow{width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:7px solid var(--cyan)}
.to-top__text{line-height:1}

@keyframes pulse-run{
  0%{transform:translateX(-100%)}
  100%{transform:translateX(340%)}
}
@keyframes drawer-in{
  from{opacity:0;transform:translateY(-10px)}
  to{opacity:1;transform:none}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .footer-inner{grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:clamp(18px,2.4vw,30px)}
}
@media (max-width:860px){
  .layout-rail{grid-template-columns:minmax(0,1fr)}
  .masthead__inner{grid-template-columns:minmax(0,1fr) auto;padding-block:10px;gap:10px}
  .masthead__index{display:none}
  .masthead__brand{justify-self:start}
  .masthead__meta{gap:.55em}
  .masthead__mail{display:none}
  .nav-toggle{
    display:inline-flex;align-items:center;gap:.55em;
    padding:.45em .7em;border:1px solid var(--line-gold);
    color:var(--gold-bright);font-size:.76rem;font-weight:700;letter-spacing:.14em;
    clip-path:polygon(0 0,calc(100% - 10px) 0,100% 10px,100% 100%,0 100%);
  }
  .nav-toggle:focus-visible{outline:none;box-shadow:inset 0 0 0 2px var(--cyan-mist)}
  .nav-toggle__bars{
    position:relative;display:block;width:20px;height:2px;
    background:var(--gold);transition:background .2s var(--ease);
  }
  .nav-toggle__bars::before,.nav-toggle__bars::after{
    content:"";position:absolute;left:0;width:20px;height:2px;
    background:var(--gold);transition:transform .22s var(--ease);
  }
  .nav-toggle__bars::before{top:-6px}
  .nav-toggle__bars::after{top:6px}
  .site-header[data-open] .nav-toggle__bars{background:transparent}
  .site-header[data-open] .nav-toggle__bars::before{transform:translateY(6px) rotate(45deg);background:var(--cyan)}
  .site-header[data-open] .nav-toggle__bars::after{transform:translateY(-6px) rotate(-45deg);background:var(--cyan)}

  .site-nav{
    position:absolute;left:0;right:0;top:100%;
    display:none;
    max-height:calc(100vh - 96px);overflow-y:auto;
    padding:6px var(--gutter) 22px;
    border-top:1px solid var(--line-gold);
    background:linear-gradient(180deg,#111C4E 0%,#0B1437 78%,#0A1230 100%);
    box-shadow:0 26px 52px rgba(0,0,0,.55);
    clip-path:polygon(0 0,100% 0,100% calc(100% - 26px),calc(100% - 26px) 100%,0 100%);
  }
  .site-header[data-open] .site-nav{display:block;animation:drawer-in .22s var(--ease) both}
  .site-nav__list{
    flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:0;padding:0;
  }
  .site-nav__list li + li{border-top:1px solid rgba(140,155,196,.16)}
  .site-nav__link{
    display:block;padding:.85em .2em .85em 1.1em;
    font-size:1rem;letter-spacing:.12em;color:var(--ivory);
  }
  .site-nav__link::after{left:.2em;right:auto;width:6px;bottom:50%;height:0;transform:scaleY(0);transform-origin:bottom}
  .site-nav__link::before{display:none}
  .site-nav__link[aria-current="page"]{color:var(--gold-bright);background:rgba(216,168,78,.08)}
  .site-nav__link[aria-current="page"]::after{display:block;height:62%;transform:scaleY(1);background:var(--cyan);width:3px}

  .footer-inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:560px){
  .footer-inner{grid-template-columns:minmax(0,1fr)}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .masthead__badge{font-size:.6rem;letter-spacing:.1em;padding:.25em .5em}
  .masthead__latin{letter-spacing:.24em}
  .footer-contact__row{flex-direction:column;gap:.15em}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  [data-reveal]{opacity:1;transform:none}
  .to-top{transform:none}
  .masthead__pulse::after{animation:none;background:var(--gold)}
}