/* =========================================================
   HTH 官方中文站 — 共享样式 /assets/site.css
   深空蓝底 · 炭黑资料卡 · 暗金刻度 · 荧光绿在线 · 洋红警示
   ========================================================= */

:root{
  --ink-void:#071426;
  --ink-carbon:#0B1220;
  --gold:#C9A24A;
  --lime:#2AF5B0;
  --magenta:#FF3D8A;
  --haze:#8FA3BF;
  --paper:#F4F7FB;
  --steel:#1B3550;
  --violet:#7B61FF;

  --shell:1240px;
  --gutter:clamp(16px,4vw,44px);
  --rail:240px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,"Courier New",monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow-card:0 22px 48px -34px rgba(0,0,0,.95);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,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;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--steel);margin:0}
input,textarea,select{font:inherit;color:inherit}

/* ---------- 基础氛围 ---------- */
html{background-color:var(--ink-void)}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(900px 520px at 10% -8%, rgba(42,245,176,.075), transparent 62%),
    radial-gradient(780px 520px at 94% 2%, rgba(123,97,255,.10), transparent 64%),
    radial-gradient(1100px 720px at 50% 112%, rgba(201,162,74,.06), transparent 66%);
}
body{
  background:transparent;
  color:var(--paper);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  letter-spacing:.012em;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  word-break:break-word;
}
::selection{background:var(--gold);color:#071426}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#050d18}
::-webkit-scrollbar-thumb{background:#1B3550;border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:#27506f}

:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:2px}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

/* ---------- 显现协议 ---------- */
.js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* =========================================================
   头部
   ========================================================= */
.site-header{
  position:relative;
  z-index:90;
  background:var(--ink-carbon);
  border-bottom:1px solid var(--steel);
  color:var(--paper);
}

.scroll-meter{
  position:fixed;
  top:0;left:0;right:0;
  height:2px;
  z-index:120;
  background:rgba(27,53,80,.55);
}
.scroll-meter__fill{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--lime),var(--gold) 58%,var(--magenta));
  transition:width .12s linear;
}

.skip-link{
  position:fixed;
  left:16px;
  top:-90px;
  z-index:220;
  padding:11px 18px;
  background:var(--lime);
  color:#04121c;
  font-size:14px;
  font-weight:700;
  letter-spacing:.08em;
  border-radius:2px;
  transition:top .18s var(--ease);
}
.skip-link:focus{top:14px}

/* 状态脉冲带 */
.signal-bar{
  background:linear-gradient(90deg, rgba(42,245,176,.09), rgba(123,97,255,.09) 55%, rgba(255,61,138,.09));
  border-bottom:1px solid var(--steel);
}
.signal-bar__inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:7px var(--gutter);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px 24px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--haze);
}
.signal-item{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.signal-item--mono{color:rgba(244,247,251,.78)}
.signal-item--warn{color:var(--magenta)}
.signal-dot{
  width:6px;height:6px;
  flex:none;
  border-radius:50%;
  background:var(--lime);
  animation:pulse 2.6s var(--ease) infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(42,245,176,.55)}
  70%{box-shadow:0 0 0 9px rgba(42,245,176,0)}
  100%{box-shadow:0 0 0 0 rgba(42,245,176,0)}
}

/* 居中刊头 */
.masthead{position:relative;background:var(--ink-carbon)}
.masthead__inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:18px var(--gutter);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:14px;
}
.masthead__slot{display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-width:0}
.masthead__slot--end{justify-content:flex-end}

.brand{
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding:2px 10px;
  transition:opacity .2s var(--ease);
}
.brand:hover{opacity:.94}
.brand__mark{
  font-size:clamp(26px,3.3vw,40px);
  font-weight:800;
  line-height:1;
  letter-spacing:.22em;
  text-indent:.22em;
  color:var(--paper);
  text-shadow:0 0 28px rgba(201,162,74,.3);
  transition:color .2s var(--ease),text-shadow .2s var(--ease);
}
.brand:hover .brand__mark{color:var(--gold);text-shadow:0 0 34px rgba(201,162,74,.5)}
.brand__rule{
  display:block;
  width:100%;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,162,74,.85),transparent);
}
.brand__name{
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.44em;
  text-indent:.44em;
  color:var(--haze);
  white-space:nowrap;
}

/* 数据芯片 */
.stat-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 11px;
  border:1px solid var(--steel);
  border-radius:2px;
  background:rgba(7,20,38,.62);
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:11.5px;
  letter-spacing:.12em;
  color:var(--haze);
  white-space:nowrap;
}
.stat-chip__label{color:inherit}
.stat-chip__value{
  font-size:15px;
  font-weight:700;
  line-height:1;
  letter-spacing:.04em;
  color:var(--gold);
}
.stat-chip__value--sm{font-size:12px;color:var(--lime)}
.stat-chip--live{border-color:rgba(42,245,176,.42);color:var(--lime)}
.stat-chip--mono{border-color:rgba(123,97,255,.4)}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:14px;
  font-weight:700;
  line-height:1;
  letter-spacing:.09em;
  white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:active{transform:translateY(1px)}
.btn--sm{padding:8px 14px;font-size:12.5px}
.btn--primary{background:var(--lime);border-color:var(--lime);color:#04121c}
.btn--primary:hover{background:#54ffc3;border-color:#54ffc3}
.btn--ghost{background:rgba(42,245,176,.07);border-color:rgba(42,245,176,.45);color:var(--lime)}
.btn--ghost:hover{background:rgba(42,245,176,.17);border-color:var(--lime)}
.btn--quiet{background:transparent;border-color:var(--steel);color:var(--haze)}
.btn--quiet:hover{border-color:var(--gold);color:var(--gold)}

/* 移动按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--steel);
  border-radius:2px;
  background:rgba(7,20,38,.72);
  color:var(--paper);
  font-size:12px;
  letter-spacing:.2em;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bars i{
  display:block;
  height:1.5px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(5.5px) 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(-5.5px) rotate(-45deg)}
.nav-toggle__text{letter-spacing:.2em}

/* 栏目标签导航 */
.nav-rail{
  position:relative;
  z-index:80;
  background:var(--ink-carbon);
  border-bottom:1px solid var(--steel);
}
.nav-rail__inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}
.nav-list{display:flex;flex-wrap:wrap;align-items:stretch}
.nav-list__item{display:flex}
.nav-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:15px 20px;
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.13em;
  color:var(--haze);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:20px;right:20px;bottom:0;
  height:2px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--paper);background:rgba(42,245,176,.07)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{color:var(--gold);background:rgba(201,162,74,.08)}
.nav-link[aria-current="page"]::after{transform:scaleX(1)}

/* =========================================================
   页脚
   ========================================================= */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background:var(--ink-carbon);
  border-top:1px solid var(--steel);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(201,162,74,.65),transparent);
}
.footer-top{padding:clamp(40px,6vw,72px) 0 0}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(26px,4vw,48px);
}
.footer-col{min-width:0}
.footer-col__title{
  font-size:12px;
  font-weight:600;
  letter-spacing:.28em;
  color:var(--gold);
  padding-bottom:10px;
  margin-bottom:16px;
  border-bottom:1px solid var(--steel);
}
.footer-brand{
  display:inline-flex;
  align-items:baseline;
  gap:10px;
  margin-bottom:16px;
}
.footer-brand__mark{
  font-size:22px;
  font-weight:800;
  letter-spacing:.2em;
  color:var(--paper);
}
.footer-brand__name{
  font-size:12px;
  letter-spacing:.3em;
  color:var(--haze);
}
.footer-note{
  font-size:14px;
  line-height:1.85;
  color:var(--haze);
  max-width:36ch;
}
.status-key{display:flex;flex-direction:column;gap:9px;margin-top:18px}
.status-key__item{
  display:flex;
  align-items:center;
  gap:9px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.09em;
  color:var(--haze);
}
.status-key__dot{width:7px;height:7px;flex:none;border-radius:50%}
.status-key__dot--live{background:var(--lime);box-shadow:0 0 0 3px rgba(42,245,176,.15)}
.status-key__dot--warn{background:var(--magenta);box-shadow:0 0 0 3px rgba(255,61,138,.15)}

.footer-list{display:flex;flex-direction:column;gap:11px}
.footer-link,
.footer-text{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:14.5px;
  color:var(--haze);
  transition:color .18s var(--ease);
}
.footer-link::before,
.footer-text::before{
  content:"";
  width:12px;
  height:1px;
  flex:none;
  background:var(--steel);
  transition:background-color .18s var(--ease),width .18s var(--ease);
}
.footer-link:hover{color:var(--paper)}
.footer-link:hover::before{width:22px;background:var(--lime)}
.footer-sub{
  margin-top:14px;
  font-size:12.5px;
  line-height:1.8;
  color:rgba(143,163,191,.72);
  max-width:30ch;
}

.footer-bottom{
  margin-top:clamp(34px,5vw,60px);
  border-top:1px solid var(--steel);
  background:rgba(7,20,38,.62);
}
.footer-bottom__inner{
  max-width:var(--shell);
  margin:0 auto;
  padding:18px var(--gutter);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 26px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:12.5px;
  letter-spacing:.09em;
  color:var(--haze);
}
.footer-legal{color:var(--haze)}
.footer-legal:first-child{color:rgba(244,247,251,.72)}

/* =========================================================
   通用容器与组件
   ========================================================= */
.shell{
  width:100%;
  max-width:var(--shell);
  margin:0 auto;
  padding:0 var(--gutter);
}

.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--rail{
  display:grid;
  grid-template-columns:var(--rail) minmax(0,1fr);
  gap:clamp(20px,3vw,36px);
  align-items:start;
}

.data-rail{
  position:sticky;
  top:24px;
  padding:18px;
  background:var(--ink-carbon);
  border:1px solid var(--steel);
  border-radius:3px;
  box-shadow:var(--shadow-card);
}

.card{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  background:var(--ink-carbon);
  border:1px solid var(--steel);
  border-radius:3px;
  box-shadow:var(--shadow-card);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.card--lift:hover{border-color:rgba(201,162,74,.5);transform:translateY(-2px)}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--steel);
  border-radius:999px;
  background:rgba(7,20,38,.7);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.13em;
  color:var(--haze);
}
.tag--gold{color:var(--gold);border-color:rgba(201,162,74,.5)}
.tag--lime{color:var(--lime);border-color:rgba(42,245,176,.45)}
.tag--magenta{color:var(--magenta);border-color:rgba(255,61,138,.5)}
.tag--violet{color:var(--violet);border-color:rgba(123,97,255,.5)}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:14px 22px;
  padding-bottom:14px;
  margin-bottom:clamp(20px,3vw,34px);
  border-bottom:1px solid var(--steel);
}
.section-head__eyebrow{
  display:block;
  margin-bottom:8px;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.26em;
  color:var(--gold);
}
.section-head__title{
  font-size:clamp(22px,3vw,34px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:.02em;
  color:var(--paper);
}
.section-head__note{
  font-size:13px;
  line-height:1.7;
  color:var(--haze);
  max-width:38ch;
}

/* 面包屑 */
.breadcrumb{
  padding:18px 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.11em;
  color:var(--haze);
}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center}
.breadcrumb__item{display:inline-flex;align-items:center}
.breadcrumb__item + .breadcrumb__item::before{
  content:"／";
  margin:0 10px;
  color:var(--steel);
}
.breadcrumb__link{color:var(--haze);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--lime)}
.breadcrumb__current{color:var(--gold)}

/* 长文排版 */
.prose{
  max-width:74ch;
  font-size:17px;
  line-height:1.85;
  color:rgba(244,247,251,.9);
}
.prose > * + *{margin-top:1.1em}
.prose h2{
  margin-top:2em;
  font-size:clamp(23px,2.6vw,32px);
  line-height:1.25;
  letter-spacing:.02em;
  color:var(--paper);
}
.prose h3{
  margin-top:1.8em;
  font-size:19px;
  letter-spacing:.06em;
  color:var(--gold);
}
.prose a{color:var(--lime);border-bottom:1px solid rgba(42,245,176,.35)}
.prose a:hover{border-bottom-color:var(--lime)}
.prose ul{list-style:none}
.prose li{position:relative;padding-left:22px}
.prose li + li{margin-top:.5em}
.prose li::before{
  content:"";
  position:absolute;
  left:0;top:.9em;
  width:9px;height:1px;
  background:var(--gold);
}
.prose strong{color:var(--paper);font-weight:700}
.prose code{
  padding:.15em .4em;
  border-radius:2px;
  background:rgba(42,245,176,.09);
  font-family:var(--font-mono);
  font-size:.92em;
  color:var(--lime);
}
.prose blockquote{
  padding:6px 0 6px 20px;
  border-left:2px solid var(--gold);
  color:var(--haze);
}

/* 图片容器基础规则 */
.media-frame{
  position:relative;
  overflow:hidden;
  border:1px solid var(--steel);
  border-radius:3px;
  background:
    linear-gradient(135deg, rgba(27,53,80,.62), rgba(11,18,32,.94)),
    var(--ink-carbon);
}
.media-frame::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    linear-gradient(115deg, transparent 46%, rgba(42,245,176,.14) 50%, transparent 54%),
    linear-gradient(-115deg, transparent 46%, rgba(201,162,74,.13) 50%, transparent 54%);
  opacity:.9;
}
.media-frame__img{
  width:100%;
  height:100%;
  object-fit:cover;
  position:relative;
  z-index:1;
}
.media-frame--16x9{aspect-ratio:16 / 9}
.media-frame--4x3{aspect-ratio:4 / 3}
.media-frame--1x1{aspect-ratio:1 / 1}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame__cap{
  position:absolute;
  left:0;right:0;bottom:0;
  z-index:2;
  padding:16px;
  background:linear-gradient(180deg,transparent,rgba(7,20,38,.94));
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.11em;
  color:var(--haze);
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width:1180px){
  .masthead__slot--start .stat-chip--live{display:none}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-col--brand{grid-column:1 / -1}
}

@media (max-width:1080px){
  .grid--rail{grid-template-columns:minmax(0,1fr)}
  .data-rail{position:static;top:auto}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:900px){
  body{font-size:16px}
  .signal-bar__inner{padding-top:6px;padding-bottom:6px;gap:6px 18px;font-size:11px}
  .signal-item--mono{display:none}

  .masthead__inner{
    grid-template-columns:minmax(0,1fr);
    justify-items:center;
    padding:14px var(--gutter);
  }
  .masthead__slot{display:none}
  .brand__mark{font-size:28px}
  .brand__name{font-size:11px;letter-spacing:.36em;text-indent:.36em}

  .nav-toggle{
    display:inline-flex;
    position:absolute;
    right:var(--gutter);
    top:50%;
    transform:translateY(-50%);
  }

  .nav-rail{
    position:absolute;
    top:100%;
    left:0;right:0;
    background:var(--ink-carbon);
    border-top:1px solid var(--steel);
    border-bottom:1px solid var(--steel);
    box-shadow:0 30px 60px -34px rgba(0,0,0,.98);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s linear;
  }
  .nav-rail[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav-rail__inner{padding:0}
  .nav-list{flex-direction:column}
  .nav-list__item{display:block}
  .nav-link{
    display:flex;
    width:100%;
    padding:15px var(--gutter);
    border-bottom:1px solid rgba(27,53,80,.75);
    font-size:15px;
  }
  .nav-link::after{left:0;right:auto;width:3px;height:100%;top:0;bottom:0;transform:scaleY(0);transform-origin:top center}
  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after{transform:scaleY(1)}
  .nav-link[aria-current="page"]{background:rgba(201,162,74,.1)}

  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-bottom__inner{justify-content:flex-start}
}

@media (max-width:640px){
  .grid--2,.grid--3,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .footer-note,.footer-sub{max-width:none}
  .section-head{align-items:flex-start}
  .btn{width:100%}
  .btn--sm{width:auto}
  .masthead .btn{width:auto}
}

@media (min-width:901px){
  .nav-rail[data-open]{opacity:1;visibility:visible;transform:none}
}

/* ---------- 无障碍降级 ---------- */
@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{animation:none}
  .js [data-reveal]{opacity:1;transform:none}
  .scroll-meter__fill{transition:none}
}