/* ============================================================
   葡萄京中心 · 共享站点样式 /assets/site.css
   ============================================================ */

/* ---------- 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,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
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%}

/* ---------- 2. Design tokens ---------- */
:root{
  --night:#140A24;
  --grape:#6C2BD9;
  --grape-deep:#2A1147;
  --mist:#B79BF2;
  --green:#2FD08A;
  --green-soft:#A9F2CE;
  --gold:#E9B04C;
  --paper:#F5F3FA;
  --ink:#0B0812;
  --ash:#8E88A0;

  --text-body:#D9D2EC;
  --text-dim:#A79FC0;

  --line:rgba(183,155,242,.22);
  --line-soft:rgba(183,155,242,.10);
  --glass:rgba(42,17,71,.52);
  --glass-2:rgba(20,10,36,.74);

  --font-title:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-title);
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --step-1:13px;
  --step-2:14px;
  --step-3:17px;
  --step-4:22px;
  --step-5:40px;
  --step-6:clamp(32px,6.4vw,88px);

  --shell:1280px;
  --gutter:24px;
  --radius:14px;
  --radius-sm:8px;
}

/* ---------- 3. Base ---------- */
body{
  font-family:var(--font-body);
  font-size:var(--step-3);
  line-height:1.8;
  font-weight:400;
  color:var(--text-body);
  background-color:var(--night);
  background-image:
    repeating-linear-gradient(0deg,rgba(183,155,242,.045) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(90deg,rgba(183,155,242,.045) 0 1px,transparent 1px 96px),
    radial-gradient(120% 85% at 88% -12%,rgba(108,43,217,.34),transparent 62%),
    radial-gradient(95% 70% at -5% 104%,rgba(47,208,138,.11),transparent 66%);
  min-height:100vh;
}
h1,h2,h3,h4{font-family:var(--font-title);font-weight:800;line-height:1.16;letter-spacing:-.01em;color:var(--paper)}
h4{font-size:var(--step-4);font-weight:700}
p{max-width:38em}
strong{color:var(--paper);font-weight:700}
::selection{background:rgba(108,43,217,.55);color:#fff}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}

.mono{font-family:var(--font-mono);font-size:.88em;letter-spacing:.02em;color:var(--green)}

/* ---------- 4. Layout ---------- */
.container{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--gutter)}
.container--narrow{max-width:760px}
.container--wide{max-width:1520px}
.section{padding:clamp(52px,8vw,108px) 0}
.section__head{max-width:760px;margin-bottom:clamp(26px,4vw,48px)}
.section__title{font-size:var(--step-5);font-weight:800;letter-spacing:-.02em}
.section__note{margin-top:12px;font-size:var(--step-2);color:var(--text-dim);max-width:34em}

/* ---------- 5. Skip link ---------- */
.skip-link{
  position:absolute;left:16px;top:-72px;z-index:120;
  padding:10px 18px;
  background:var(--green-soft);color:var(--ink);
  font-size:var(--step-2);font-weight:700;border-radius:0 0 var(--radius-sm) var(--radius-sm);
  transition:top .2s ease;
}
.skip-link:focus{top:0}

/* ---------- 6. Header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,rgba(20,10,36,.97),rgba(20,10,36,.84));
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.header-shell{
  position:relative;
  max-width:var(--shell);
  margin:0 auto;
  padding:13px var(--gutter);
  min-height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  transition:min-height .3s ease,padding .3s ease;
}
.site-header[data-compact] .header-shell{min-height:52px;padding-top:7px;padding-bottom:7px}

.brand{display:flex;flex-direction:column;gap:1px;line-height:1.22;min-width:0}
.brand__mark{
  position:relative;
  font-size:19px;font-weight:800;letter-spacing:.03em;color:var(--paper);
  display:inline-flex;align-items:center;gap:9px;
}
.brand__mark::after{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 3px rgba(233,176,76,.16);
}
.brand__line{
  font-size:12px;letter-spacing:.16em;color:var(--ash);
  max-height:20px;overflow:hidden;
  transition:opacity .25s ease,max-height .25s ease;
}
.site-header[data-compact] .brand__line{opacity:0;max-height:0}

.nav-toggle{
  display:none;
  position:relative;z-index:80;
  align-items:center;gap:10px;
  padding:9px 16px;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(108,43,217,.24);
  color:var(--paper);
  font-size:var(--step-1);font-weight:700;letter-spacing:.16em;
  transition:background-color .22s ease,border-color .22s ease;
}
.nav-toggle:hover{background:rgba(108,43,217,.4);border-color:var(--mist)}
.nav-toggle__bars{position:relative;display:inline-block;width:16px;height:10px}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;border-radius:2px;
  background:currentColor;
  transition:transform .3s ease;
}
.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)}

.site-nav{display:flex;align-items:center;gap:26px}
.site-nav__list{display:flex;align-items:center;gap:2px}
.site-nav__link{
  display:inline-block;padding:9px 13px;border-radius:999px;
  font-size:15px;font-weight:500;letter-spacing:.02em;color:#C9C0E4;
  transition:color .22s ease,background-color .22s ease,box-shadow .22s ease;
}
.site-nav__link:hover{color:var(--paper);background:rgba(108,43,217,.36)}
.site-nav__link[aria-current="page"],
.site-nav__link[aria-current="true"]{
  color:var(--green-soft);
  background:rgba(47,208,138,.13);
  box-shadow:inset 0 0 0 1px rgba(47,208,138,.4);
}

.nav-utility{display:flex;align-items:center;gap:16px}
.nav-utility__link{
  font-size:var(--step-1);letter-spacing:.1em;color:var(--ash);
  padding-bottom:2px;border-bottom:1px dashed transparent;
  transition:color .22s ease,border-color .22s ease;
}
.nav-utility__link:hover{color:var(--mist);border-bottom-color:var(--mist)}

/* ---------- 7. Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;border:1px solid transparent;
  font-size:var(--step-2);font-weight:700;letter-spacing:.04em;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn--primary{
  background:var(--grape);color:#fff;
  box-shadow:0 10px 26px rgba(108,43,217,.38);
}
.btn--primary:hover{background:#7F42F0;transform:translateY(-1px)}
.btn--ghost{
  background:transparent;color:var(--green-soft);
  border-color:rgba(169,242,206,.45);
}
.btn--ghost:hover{border-color:var(--green);color:var(--green);background:rgba(47,208,138,.1)}
.btn--sm{padding:8px 16px;font-size:var(--step-1);letter-spacing:.06em}

/* ---------- 8. Breadcrumb ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  margin-top:24px;
  font-size:var(--step-1);letter-spacing:.08em;color:var(--ash);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb__item a{color:var(--mist);transition:color .2s ease}
.breadcrumb__item a:hover{color:var(--green-soft)}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";color:rgba(142,136,160,.55);
}

/* ---------- 9. Tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  font-size:var(--step-1);font-weight:600;letter-spacing:.08em;line-height:1.6;
}
.tag--mist{background:rgba(183,155,242,.16);color:var(--mist)}
.tag--green{background:rgba(47,208,138,.15);color:var(--green)}
.tag--gold{background:rgba(233,176,76,.16);color:var(--gold)}

/* ---------- 10. Cards ---------- */
.card{
  position:relative;
  padding:24px 22px 20px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--glass);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.card--solid{background:var(--grape-deep);border-color:rgba(183,155,242,.28)}
.card__label{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:var(--step-1);letter-spacing:.16em;color:var(--mist);
  font-family:var(--font-mono);
}
.card__title{margin-top:12px;font-size:var(--step-4);font-weight:800;color:var(--paper)}
.card__body{margin-top:10px;font-size:var(--step-2);color:var(--text-dim);max-width:36em}
.card__foot{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}

/* ---------- 11. Vine divider ---------- */
.vine{position:relative;height:26px;margin:clamp(28px,5vw,56px) 0}
.vine::before{
  content:"";position:absolute;left:0;right:0;top:50%;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.vine::after{
  content:"";position:absolute;top:50%;left:50%;
  width:9px;height:9px;margin:-4.5px 0 0 -4.5px;border-radius:50%;
  background:var(--night);border:1.5px solid var(--mist);
}

/* ---------- 12. Figure / image frames ---------- */
.figure{margin:0}
.figure__media{
  position:relative;width:100%;aspect-ratio:16 / 10;overflow:hidden;
  border:1px solid var(--line);border-radius:var(--radius);
  background:
    linear-gradient(140deg,rgba(108,43,217,.34),rgba(47,208,138,.10) 62%,rgba(233,176,76,.10)),
    var(--grape-deep);
}
.figure__media::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(0deg,rgba(183,155,242,.10) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(90deg,rgba(183,155,242,.10) 0 1px,transparent 1px 44px);
}
.figure__img{width:100%;height:100%;object-fit:cover}
.figure__caption{margin-top:10px;font-size:var(--step-1);color:var(--ash);letter-spacing:.04em}
.figure--wide .figure__media{aspect-ratio:21 / 9}
.figure--tall .figure__media{aspect-ratio:4 / 5}
.figure--square .figure__media{aspect-ratio:1 / 1}

/* ---------- 13. Reveal / motion hooks ---------- */
[data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .5s ease,transform .5s ease;
}
[data-reveal="in"]{opacity:1;transform:none}

.scroll-progress{
  position:fixed;top:0;left:0;width:100%;height:2px;z-index:90;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--green),var(--mist),var(--gold));
  pointer-events:none;
}
.to-top{
  position:fixed;right:22px;bottom:24px;z-index:80;
  padding:10px 17px;border-radius:999px;
  background:var(--glass-2);border:1px solid var(--line);
  color:var(--green-soft);font-size:var(--step-1);letter-spacing:.14em;
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s ease,border-color .2s ease;
}
.to-top:hover{border-color:var(--green)}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}

/* ---------- 14. Section index ---------- */
[data-index] a[aria-current="true"]{
  color:var(--green-soft);
  border-left-color:var(--green);
  transform:translateX(3px);
}

/* ---------- 15. Footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,140px);
  background:linear-gradient(180deg,rgba(20,10,36,0) 0%,rgba(20,10,36,.55) 26%,#1B0C33 100%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--mist),transparent);opacity:.55;
}
.footer-inner{
  max-width:var(--shell);margin:0 auto;
  padding:clamp(46px,6vw,72px) var(--gutter) 34px;
  display:grid;grid-template-columns:minmax(220px,1.15fr) 2fr;gap:clamp(32px,5vw,56px);
}
.footer-brand__mark{font-size:22px;font-weight:800;letter-spacing:.03em;color:var(--paper)}
.footer-brand__line{margin-top:8px;font-size:var(--step-2);color:var(--text-dim);max-width:24em}
.footer-brand .tag{margin-top:16px}

.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:32px}
.footer-col__title{
  font-size:var(--step-1);font-weight:700;letter-spacing:.18em;
  color:var(--gold);margin-bottom:16px;
}
.footer-col__list li + li{margin-top:9px}
.footer-col__list a{
  font-size:var(--step-2);color:var(--text-dim);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
}
.footer-col__list a:hover{color:var(--paper);border-bottom-color:var(--mist)}

.footer-meta{
  max-width:var(--shell);margin:0 auto;
  padding:20px var(--gutter) 42px;
  border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 32px;
  font-size:var(--step-1);color:var(--ash);
}
.footer-contact{max-width:62em;letter-spacing:.02em}
.footer-legal{letter-spacing:.06em;white-space:nowrap}

/* ---------- 16. Responsive ---------- */
@media (max-width:1120px){
  .site-nav{gap:12px}
  .site-nav__link{padding:8px 9px;font-size:14px}
  .nav-utility{gap:10px}
  .nav-utility__link{font-size:12px;letter-spacing:.06em}
  .btn--sm{padding:8px 13px}
}

@media (max-width:900px){
  :root{--gutter:20px}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;top:0;right:0;bottom:0;
    width:min(340px,88vw);
    flex-direction:column;align-items:stretch;justify-content:flex-start;gap:0;
    padding:96px 22px 40px;
    background:linear-gradient(180deg,#2A1147 0%,#1C0C33 72%);
    border-left:1px solid var(--line);
    box-shadow:-30px 0 60px rgba(0,0,0,.55);
    transform:translateX(105%);
    transition:transform .4s cubic-bezier(.22,.68,.24,1);
    overflow-y:auto;
    z-index:70;
  }
  .site-nav[data-open]{transform:translateX(0)}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:2px}
  .site-nav__link{
    display:block;padding:13px 14px;border-radius:10px;
    font-size:18px;font-weight:600;letter-spacing:.04em;
  }
  .nav-utility{
    flex-direction:column;align-items:stretch;gap:14px;
    margin-top:26px;padding-top:24px;border-top:1px solid var(--line);
  }
  .nav-utility__link{font-size:var(--step-2);letter-spacing:.1em}
  .nav-utility .btn{width:100%;padding:13px 18px;font-size:var(--step-2)}
  .footer-inner{grid-template-columns:1fr;gap:38px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px}
  .footer-legal{white-space:normal}
  .section__title{font-size:clamp(26px,7vw,34px)}
}

@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .footer-meta{flex-direction:column;align-items:flex-start}
  .to-top{right:14px;bottom:16px}
  .figure__media{aspect-ratio:4 / 3}
}

/* ---------- 17. 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .site-nav{transition:none}
  .scroll-progress{transition:none}
  .to-top{transition:opacity .2s ease,visibility .2s ease}
}