/* ============================================================
   亚洲城中心 · 中文站 — 共享样式表 /assets/site.css
   深海夜蓝 × 鎏金：档案库的理性 + 都市夜航的呼吸感
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --deep-sea:#061A2E;
  --navy:#0E2E4A;
  --teal-deep:#10394A;
  --teal-mid:#1E6E80;
  --gold:#C8A227;
  --gold-light:#EBD07E;
  --neon:#29E0C4;
  --coral:#FF7A59;
  --indigo:#3A2B6B;
  --paper:#F5F1E8;
  --ink:#14161C;

  --ink-82:rgba(20,22,28,.82);
  --ink-70:rgba(20,22,28,.70);
  --ink-55:rgba(20,22,28,.55);
  --paper-80:rgba(245,241,232,.80);
  --paper-70:rgba(245,241,232,.70);
  --paper-55:rgba(245,241,232,.55);
  --line-light:rgba(20,22,28,.14);
  --line-dark:rgba(235,208,126,.22);

  --font-display:"PingFang SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Source Han Serif SC","Noto Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --shell:1280px;
  --gutter:clamp(16px,3vw,32px);
  --bevel:14px;
  --stroke:1.5px;
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{margin:0;padding:0;-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(20,22,28,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(20,22,28,.045) 1px,transparent 1px);
  background-size:48px 48px;
  color:var(--ink);
  font-family:var(--font-body);
  font-size:1.05rem;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.015em;
  margin:0 0 .7em;
  overflow-wrap:break-word;
}
h1{font-size:clamp(2.6rem,7vw,5.4rem);line-height:1.04}
h2{font-size:clamp(1.9rem,3.6vw,2.4rem)}
h3{font-size:1.15rem;font-weight:700;line-height:1.4}
strong{font-weight:700}
::selection{background:var(--gold);color:#1B1503}

:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
.btn:focus-visible,.card:focus-visible,.filter-chip:focus-visible,.panel:focus-visible{
  outline:none;
  box-shadow:inset 0 0 0 2px var(--neon);
}

/* ---------- 3. 排版工具 ---------- */
.mono{
  font-family:var(--font-mono);
  font-size:.82rem;
  font-weight:500;
  letter-spacing:.14em;
  text-transform:uppercase;
  line-height:1.5;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:.72rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);margin:0 0 16px;
}
.eyebrow::before{content:"";width:26px;height:var(--stroke);background:currentColor}
.on-dark{color:var(--paper)}
.on-dark p,.on-dark .card__text{color:var(--paper-70)}
.on-dark .tag--gold{color:var(--gold-light)}
.on-dark .tag--cyan{color:var(--neon)}
.on-dark .tag--coral{color:var(--coral)}

/* ---------- 4. 布局 ---------- */
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding-left:var(--gutter);padding-right:var(--gutter)}
.section{padding:clamp(40px,7vw,88px) 0}
.section--tight{padding:clamp(28px,4vw,48px) 0}
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(24px,4vw,56px);align-items:start}
.split--wide{grid-template-columns:4fr 8fr}
.stack{display:flex;flex-direction:column;gap:clamp(16px,2.4vw,28px)}
.grid{display:grid;gap:16px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:1000px){.grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:900px){.split,.split--wide{grid-template-columns:1fr}}
@media (max-width:620px){.grid--2,.grid--3{grid-template-columns:1fr}}

.prose{max-width:38em;font-size:1.05rem}
.prose p{color:var(--ink-82);margin:0 0 1.15em}
.prose h2{font-size:clamp(1.6rem,3vw,2.2rem)}
.prose li{position:relative;padding-left:1.4em;margin-bottom:.5em;color:var(--ink-82)}
.prose li::before{content:"";position:absolute;left:0;top:.72em;width:9px;height:var(--stroke);background:var(--gold)}

/* ---------- 5. 基础组件 ---------- */
.skip-link{
  position:fixed;top:10px;left:16px;z-index:200;
  padding:10px 16px;
  background:var(--gold);color:#1B1503;
  font-family:var(--font-display);font-weight:700;font-size:.85rem;letter-spacing:.06em;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transform:translateY(-160%);
  transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

.btn{
  display:inline-flex;align-items:center;gap:.5em;
  padding:.62em 1.1em;
  font-family:var(--font-display);font-weight:700;font-size:.86rem;letter-spacing:.06em;
  background:var(--gold);color:#1B1503;
  border:1px solid var(--gold);
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn:hover{background:var(--gold-light);border-color:var(--gold-light);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--gold-light);border-color:rgba(235,208,126,.5)}
.btn--ghost:hover{background:rgba(200,162,39,.16);color:var(--paper);border-color:var(--gold-light)}
.btn--solid{background:var(--neon);border-color:var(--neon);color:#04211D}
.btn--solid:hover{background:#4BEFD6;border-color:#4BEFD6}
.btn--sm{padding:.5em .85em;font-size:.78rem}
.btn--lg{padding:.85em 1.5em;font-size:.95rem}

.panel{
  position:relative;
  padding:clamp(20px,3vw,34px);
  background:var(--paper);
  border:1px solid var(--line-light);
  clip-path:polygon(var(--bevel) 0,100% 0,100% calc(100% - var(--bevel)),calc(100% - var(--bevel)) 100%,0 100%,0 var(--bevel));
}
.panel--navy{background:linear-gradient(160deg,var(--navy),var(--deep-sea));color:var(--paper);border-color:var(--line-dark)}
.panel--teal{background:linear-gradient(160deg,var(--teal-deep),#0B2A38);color:var(--paper);border-color:rgba(41,224,196,.24)}
.panel--indigo{background:linear-gradient(160deg,var(--indigo),#241A48);color:var(--paper);border-color:rgba(235,208,126,.2)}
.panel--gold{background:linear-gradient(160deg,#F0E3B8,#E2CE8C);color:#2A2107;border-color:rgba(20,22,28,.18)}

.card{
  position:relative;display:block;
  padding:22px;
  background:var(--paper);
  border:1px solid var(--line-light);
  clip-path:polygon(12px 0,100% 0,100% calc(100% - 12px),calc(100% - 12px) 100%,0 100%,0 12px);
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.card:hover{transform:translateY(-3px);border-color:var(--gold);box-shadow:0 22px 40px -30px rgba(6,26,46,.85)}
.card--dark{background:linear-gradient(160deg,var(--navy),var(--deep-sea));color:var(--paper);border-color:var(--line-dark)}
.card__num{display:block;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.2em;color:var(--gold);margin-bottom:10px}
.card__title{font-family:var(--font-display);font-weight:700;font-size:1.12rem;line-height:1.35;margin:0 0 8px}
.card__text{margin:0;font-size:.94rem;color:var(--ink-70)}
.card--dark .card__text{color:var(--paper-70)}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 10px;
  font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;
  border:1px solid currentColor;color:var(--teal-mid);
}
.tag--gold{color:#8A6F14}
.tag--cyan{color:#0F7D6D}
.tag--coral{color:#C1462A}

.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.filter-chip{
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  padding:8px 14px;
  border:1px solid var(--line-light);color:var(--ink-70);
  clip-path:polygon(8px 0,100% 0,100% calc(100% - 8px),calc(100% - 8px) 100%,0 100%,0 8px);
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.filter-chip:hover{border-color:var(--gold);color:var(--ink)}
.filter-chip[aria-pressed="true"]{background:var(--deep-sea);border-color:var(--deep-sea);color:var(--gold-light)}
.empty-state{
  display:none;
  padding:26px;
  border:1px dashed rgba(20,22,28,.28);
  font-family:var(--font-mono);font-size:.78rem;letter-spacing:.08em;line-height:1.9;
  color:var(--ink-55);
}
.empty-state.is-visible{display:block}
[data-filter-item].is-hidden{display:none}
[data-filter-item].is-enter{animation:cardIn .18s ease both}
@keyframes cardIn{from{opacity:0;transform:scale(.985)}to{opacity:1;transform:none}}

[data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
[data-reveal].is-revealed{opacity:1;transform:none}
html:not(.js-ready) [data-reveal]{opacity:1;transform:none}

.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  background:linear-gradient(160deg,var(--navy),var(--teal-deep));
  clip-path:polygon(0 0,100% 4%,100% 100%,0 96%);
}
.media-frame > img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(6,26,46,.18),rgba(6,26,46,.78));
}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}
.media-frame--beam::before{
  content:"";position:absolute;inset:0;z-index:2;pointer-events:none;
  background:repeating-linear-gradient(115deg,transparent 0 22px,rgba(41,224,196,.10) 22px 23px);
}
.media-frame__caption{
  position:absolute;left:0;bottom:0;z-index:3;
  margin:0;padding:14px 18px;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--gold-light);
}

.breadcrumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:18px 0;
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-55);
}
.breadcrumbs li{display:flex;align-items:center;gap:8px}
.breadcrumbs li + li::before{content:"/";color:rgba(20,22,28,.3)}
.breadcrumbs a:hover{color:var(--gold)}

.toc{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.1em}
.toc a{display:block;padding:7px 0;color:var(--ink-55);border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
.toc a:hover{color:var(--gold)}
.toc a[aria-current="true"]{color:var(--ink);border-bottom-color:var(--gold)}

/* ---------- 6. 页首刊头 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:linear-gradient(180deg,#061A2E 0%,#0A2440 62%,#0E2E4A 100%);
  color:var(--paper);
  border-bottom:1px solid var(--line-dark);
  box-shadow:0 20px 46px -34px rgba(6,26,46,.95);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(41,224,196,.05) 0 1px,transparent 1px 16px);
}
.masthead{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;
  padding-top:clamp(14px,2vw,22px);
  padding-bottom:clamp(10px,1.4vw,14px);
}
.masthead__meta{
  justify-self:start;margin:0;
  font-size:.7rem;letter-spacing:.2em;
  color:rgba(235,208,126,.78);
  white-space:nowrap;
}
.masthead__actions{justify-self:end;display:flex;align-items:center;gap:10px}

.brand{display:block;text-align:center;justify-self:center}
.brand__mark{
  display:block;
  font-family:var(--font-display);font-weight:900;
  font-size:clamp(1.3rem,2.6vw,2rem);
  letter-spacing:.22em;text-indent:.22em;
  color:var(--paper);
}
.brand__sub{
  display:block;margin-top:5px;
  font-size:.68rem;letter-spacing:.32em;text-indent:.32em;
  color:var(--gold-light);
}
.brand--footer{justify-self:start;text-align:left}

.nav-toggle{
  display:none;align-items:center;gap:8px;
  padding:.5em .75em;
  border:1px solid rgba(235,208,126,.5);
  color:var(--gold-light);
  font-family:var(--font-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{display:block;height:2px;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle__bars i:nth-child(2){width:72%}
.nav-toggle__label{line-height:1}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.primary-nav{position:relative;z-index:1;border-top:1px solid rgba(235,208,126,.18)}
.primary-nav__list{
  display:flex;justify-content:center;align-items:center;flex-wrap:wrap;
  gap:clamp(10px,2.4vw,38px);
}
.primary-nav__list a{
  position:relative;display:block;
  padding:12px 2px 14px;
  font-family:var(--font-display);font-weight:700;font-size:.95rem;letter-spacing:.1em;
  color:rgba(245,241,232,.76);
  transition:color .18s ease;
}
.primary-nav__list a::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--neon));
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s ease;
}
.primary-nav__list a:hover{color:var(--paper)}
.primary-nav__list a:hover::after{transform:scaleX(1)}
.primary-nav__list a[aria-current="page"]{color:var(--gold-light)}
.primary-nav__list a[aria-current="page"]::after{transform:scaleX(1)}

.scroll-beam{
  position:absolute;left:0;bottom:-1px;z-index:3;
  height:2px;width:0;
  background:linear-gradient(90deg,var(--gold),var(--neon));
  transition:width .08s linear;
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .masthead{grid-template-columns:auto 1fr;gap:10px}
  .masthead__meta{display:none}
  .brand{justify-self:start;text-align:left}
  .brand__mark{font-size:clamp(1.15rem,5.4vw,1.5rem);letter-spacing:.16em;text-indent:.16em}
  .brand__sub{font-size:.6rem;letter-spacing:.22em;text-indent:.22em}
  .masthead__actions{justify-self:end}
  .primary-nav{
    position:absolute;left:0;right:0;top:100%;
    background:linear-gradient(180deg,#0A2440,#061A2E);
    border-top:1px solid rgba(235,208,126,.2);
    border-bottom:1px solid var(--line-dark);
    visibility:hidden;
    transition:visibility 0s linear .3s;
  }
  .primary-nav[data-open="true"]{visibility:visible;transition-delay:0s}
  .primary-nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    max-height:0;overflow:hidden;padding-left:0;padding-right:0;
    transition:max-height .3s ease;
  }
  .primary-nav[data-open="true"] .primary-nav__list{max-height:80vh;padding-bottom:14px}
  .primary-nav__list li{border-top:1px solid rgba(235,208,126,.14)}
  .primary-nav__list a{padding:14px var(--gutter);font-size:1rem}
  .primary-nav__list a::after{display:none}
  .primary-nav__list a[aria-current="page"]{background:rgba(200,162,39,.12)}
}
@media (max-width:520px){
  .masthead__actions .btn--ghost{display:none}
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(48px,8vw,96px);
  background:linear-gradient(180deg,#0E2E4A 0%,#061A2E 55%,#050F1C 100%);
  color:var(--paper);
}
.site-footer__beam{
  position:absolute;top:0;left:0;right:0;height:5px;
  background:repeating-linear-gradient(100deg,rgba(200,162,39,.9) 0 34px,rgba(30,110,128,.9) 34px 62px,rgba(58,43,107,.9) 62px 84px);
}
.site-footer__grid{
  position:relative;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:clamp(24px,4vw,56px);
  padding-top:clamp(40px,6vw,72px);
  padding-bottom:clamp(28px,4vw,44px);
}
.site-footer__text{color:var(--paper-70);font-size:.95rem;max-width:34ch;margin:16px 0 0}
.site-footer__meta{margin:14px 0 0;font-size:.68rem;color:var(--neon)}
.site-footer__title{
  font-family:var(--font-mono);font-weight:500;
  font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--gold-light);margin:0 0 14px;
}
.site-footer__list li{margin:0 0 9px;font-size:.92rem;color:var(--paper-70);overflow-wrap:anywhere}
.site-footer__list a{
  border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.site-footer__list a:hover{color:var(--gold-light);border-bottom-color:rgba(235,208,126,.6)}
.site-footer__list .mono{font-size:.72rem;letter-spacing:.1em;color:var(--paper-70)}
.site-footer__legal{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding-top:18px;padding-bottom:18px;
  border-top:1px solid rgba(235,208,126,.2);
  color:var(--paper-55);
}
.site-footer__legal p{margin:0;font-size:.7rem;letter-spacing:.12em}
.site-footer__note{
  margin:0;
  padding-bottom:clamp(28px,5vw,52px);
  max-width:70ch;
  color:var(--paper-55);
  font-size:.8rem;line-height:1.9;
}
@media (max-width:900px){
  .site-footer__grid{grid-template-columns:1fr 1fr}
  .site-footer__brand{grid-column:1 / -1}
}
@media (max-width:560px){
  .site-footer__grid{grid-template-columns:1fr}
}

/* ---------- 8. 动效降级 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  [data-reveal]{opacity:1;transform:none}
  .card:hover,.btn:hover{transform:none}
  .scroll-beam{transition:none}
}