*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{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}

:root{
  --ink:#0B1D33;
  --ink-2:#12293F;
  --ink-deep:#08172A;
  --panel:#1B3A57;
  --cyan:#17E1CB;
  --cyan-dim:#0E9C92;
  --gold:#F3B23F;
  --gold-lt:#FFD98A;
  --ice:#EAF2FA;
  --mist:#93A7BC;
  --paper:#F7F9FC;
  --line:rgba(234,242,250,.14);
  --line-strong:rgba(234,242,250,.28);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"SFMono-Regular",Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --max:1240px;
  --gutter:24px;
  --r:2px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--ice);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body[data-nav-open]{overflow:hidden}

.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}

:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}

.wrap{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--gutter)}

/* ---------- 排版层级 ---------- */
.h-hero{font-size:clamp(38px,7.2vw,76px);line-height:1.04;font-weight:900;letter-spacing:-.02em}
.h-lg{font-size:clamp(28px,4.6vw,52px);line-height:1.12;font-weight:800;letter-spacing:-.02em}
.h-md{font-size:clamp(22px,3vw,34px);line-height:1.24;font-weight:800;letter-spacing:-.02em}
.h-sm{font-size:24px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
.h-xs{font-size:18px;line-height:1.5;font-weight:700}
.lead{font-size:18px;line-height:1.75;color:var(--mist)}
.prose{max-width:640px;font-size:17px;line-height:1.8}
.prose p+p{margin-top:1.1em}
.prose strong{color:var(--gold);font-weight:700}
.text-mist{color:var(--mist)}
.text-cyan{color:var(--cyan)}
.text-gold{color:var(--gold)}

/* ---------- 标签 / 版本 ---------- */
.label{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;line-height:1;letter-spacing:.08em;
  padding:8px 12px;
  border:1px solid var(--line-strong);
  color:var(--mist);
  border-radius:var(--r);
}
.label::before,.label::after{content:"";position:absolute;width:5px;height:5px;border:1px solid var(--cyan);opacity:.75}
.label::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.label::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.label--gold{color:var(--gold);border-color:rgba(243,178,63,.42)}
.label--gold::before,.label--gold::after{border-color:var(--gold)}

.ver-tag{
  display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.08em;
  padding:5px 9px;border:1px solid rgba(23,225,203,.45);
  color:var(--cyan);border-radius:var(--r);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:14px;font-weight:700;letter-spacing:.02em;line-height:1;
  padding:12px 20px;border:1px solid transparent;border-radius:var(--r);
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn--primary{background:var(--cyan);color:#06231F}
.btn--primary:hover{background:var(--cyan-dim);color:var(--paper)}
.btn--ghost{border-color:var(--line-strong);color:var(--ice)}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn--gold{background:var(--gold);color:#2A1A00}
.btn--gold:hover{background:var(--gold-lt)}
.btn--sm{padding:8px 14px;font-size:13px}

/* ---------- 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--line-strong);
}
.site-header[data-scrolled]{box-shadow:0 10px 30px rgba(4,12,24,.55)}

.skip-link{
  position:absolute;left:16px;top:-64px;z-index:140;
  background:var(--gold);color:#20160A;font-size:14px;font-weight:700;
  padding:10px 16px;border-radius:var(--r);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px}

.action-bar{background:var(--ink-deep);border-bottom:1px solid var(--line)}
.action-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:32px;padding-block:5px}
.action-bar__sign{font-size:13px;color:var(--mist);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.action-bar__sep{color:var(--cyan)}
.action-bar__right{display:flex;align-items:center;gap:12px;flex:none}

.brand-layer{
  max-height:140px;overflow:hidden;
  background:
    radial-gradient(120% 200% at 0% 0%,rgba(23,225,203,.12),transparent 58%),
    radial-gradient(90% 200% at 100% 100%,rgba(243,178,63,.10),transparent 60%),
    var(--ink-2);
  border-bottom:1px solid var(--line);
  transition:max-height .28s var(--ease),opacity .2s var(--ease);
}
.site-header[data-scrolled] .brand-layer{max-height:0;opacity:0}
.brand-layer__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:52px;padding-block:10px}
.brand-layer__note{font-size:14px;color:var(--mist);max-width:64ch}
.brand-layer__meta{display:flex;align-items:center;gap:12px;flex:none;font-size:12px;color:var(--mist);letter-spacing:.04em}
.brand-layer__dot{width:5px;height:5px;background:var(--gold);border-radius:50%;flex:none}
.brand-layer__more{display:none;font-size:12px;letter-spacing:.06em;color:var(--cyan);border-bottom:1px solid rgba(23,225,203,.5);padding:0 0 1px}

.nav-layer{background:var(--ink)}
.nav-layer__inner{display:flex;align-items:center;gap:16px;min-height:56px}
.site-nav{width:100%}
.site-nav__list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:8px;
  padding:8px 12px 10px;
  font-size:15px;color:var(--mist);
  border-bottom:2px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.site-nav__link:hover{color:var(--cyan)}
.site-nav__link[aria-current="page"]{color:var(--ice);font-weight:700;border-bottom-color:var(--gold)}
.site-nav__num{font-size:11px;color:rgba(147,167,188,.72)}
.site-nav__link[aria-current="page"] .site-nav__num{color:var(--gold)}

.drawer-cats{display:none}
.drawer-cats__title{font-size:12px;letter-spacing:.08em;color:var(--gold)}
.drawer-cats__list{margin-top:14px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.drawer-cats__list a{
  display:flex;align-items:center;gap:8px;
  font-size:14px;color:var(--ice);
  padding:12px;border:1px solid var(--line-strong);border-radius:var(--r);
  background:rgba(27,58,87,.5);
}
.drawer-cats__list a:hover{border-color:var(--cyan);color:var(--cyan)}
.drawer-cats__list .mono{font-size:11px;color:var(--gold)}

.nav-toggle{
  display:none;align-items:center;gap:10px;
  padding:8px 12px;border:1px solid var(--line-strong);border-radius:var(--r);
  font-size:13px;letter-spacing:.06em;color:var(--ice);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle__bars{display:flex;flex-direction:column;gap:5px;width:18px}
.nav-toggle__bars i{display:block;height:2px;background:currentColor;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  border-top:1px solid var(--line);
  padding:56px 0 28px;
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(23,225,203,.35) 42%,rgba(23,225,203,0) 82%);
}
.site-footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:32px}
.footer-col__title{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--gold);margin-bottom:14px}
.footer-brand{font-size:22px;font-weight:800;letter-spacing:-.01em}
.footer-desc{margin-top:10px;font-size:14px;color:var(--mist);max-width:34ch;line-height:1.75}
.footer-meta{margin-top:12px;font-size:12px;color:rgba(147,167,188,.82)}
.footer-list li+li{margin-top:8px}
.footer-list a{font-size:14px;color:var(--mist);transition:color .18s var(--ease)}
.footer-list a:hover{color:var(--cyan)}
.footer-list--contact li{font-size:14px;color:var(--mist)}
.footer-code{display:inline-block;min-width:34px;font-size:11px;color:var(--gold)}
.footer-note{margin-top:14px;font-size:12.5px;line-height:1.75;color:rgba(147,167,188,.8);max-width:42ch}
.footer-legal{margin-top:16px;display:flex;flex-wrap:wrap;gap:16px;font-size:12.5px}
.footer-legal a{color:var(--ice);border-bottom:1px solid var(--line-strong);padding-bottom:1px}
.footer-legal a:hover{color:var(--cyan);border-color:var(--cyan)}
.site-footer__base{
  margin-top:44px;padding-top:18px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:12px;color:rgba(147,167,188,.78);
}

/* ---------- 区块与网格 ---------- */
.section{padding:72px 0;border-top:1px solid var(--line)}
.section--tight{padding:48px 0}
.section--flush{border-top:0;padding-top:0}
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--7-5{grid-template-columns:7fr 5fr}
.grid--4-8{grid-template-columns:4fr 8fr}

/* ---------- 卡片 / 面板 / 纸张 ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:22px;
}
.panel--outline{background:transparent;border-color:var(--line-strong)}
.paper{
  position:relative;
  background:var(--paper);
  color:#10243A;
  border:1px solid rgba(11,29,51,.12);
  border-radius:var(--r);
  padding:24px;
  box-shadow:6px 6px 0 rgba(14,156,146,.18),12px 12px 0 rgba(243,178,63,.12);
}
.paper a{color:#0B4E52;border-bottom:1px solid rgba(14,156,146,.5)}
.paper a:hover{color:#08252B}
.paper .h-xs,.paper h2,.paper h3{color:#0B1D33}

/* ---------- 图像容器 ---------- */
.media-frame{
  position:relative;width:100%;aspect-ratio:16/9;overflow:hidden;
  border:1px solid var(--line-strong);border-radius:var(--r);
  background:
    radial-gradient(120% 92% at 10% 6%,rgba(23,225,203,.30),transparent 56%),
    radial-gradient(100% 84% at 92% 96%,rgba(243,178,63,.24),transparent 58%),
    linear-gradient(160deg,var(--ink-2),var(--panel));
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(234,242,250,.09) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(234,242,250,.09) 1px,transparent 1px);
  background-size:40px 40px;
}
.media-frame>img,.media-frame>svg{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-caption{margin-top:10px;font-size:12.5px;color:var(--mist);letter-spacing:.02em}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--mist);padding:18px 0}
.crumbs li{display:inline-flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:rgba(147,167,188,.45)}
.crumbs a{transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--ice)}

/* ---------- 筛选 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px}
.filter-btn{
  font-size:13px;letter-spacing:.05em;line-height:1;
  padding:9px 14px;border:1px solid var(--line-strong);border-radius:var(--r);
  color:var(--mist);
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.filter-btn:hover{border-color:var(--cyan);color:var(--cyan)}
.filter-btn[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:#06231F;font-weight:700}

/* ---------- 侧边标尺 ---------- */
.rail{position:sticky;top:132px;display:flex;flex-direction:column;gap:12px;font-size:13px}
.rail__link{
  padding-left:12px;border-left:2px solid var(--line);
  color:var(--mist);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.rail__link:hover{color:var(--cyan);border-color:var(--cyan)}
.rail__link[aria-current="true"]{color:var(--gold);border-color:var(--gold);font-weight:700}

/* ---------- 显现 / 过滤隐藏 / 进度 ---------- */
[data-reveal]{opacity:0;transform:translateY(8px);transition:opacity .3s var(--ease),transform .3s var(--ease)}
[data-reveal][data-visible]{opacity:1;transform:none}
.is-hidden{display:none !important}
.is-enter{animation:cardIn .24s var(--ease) both}
@keyframes cardIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.scroll-progress{
  position:fixed;top:0;left:0;height:2px;width:0;z-index:130;
  background:linear-gradient(90deg,var(--cyan),var(--gold));
  transition:width .1s linear;pointer-events:none;
}

/* ---------- 响应式 ---------- */
@media (max-width:1100px){
  .site-footer__grid{grid-template-columns:1.3fr 1fr 1fr}
  .footer-col:last-child{grid-column:1 / -1}
  .grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:960px){
  .grid--7-5,.grid--4-8,.grid--3{grid-template-columns:minmax(0,1fr)}
  .rail{position:static;flex-direction:row;flex-wrap:wrap;gap:14px}

  .nav-toggle{display:inline-flex;flex:none}
  .site-nav{
    position:fixed;inset:0;z-index:75;
    display:flex;flex-direction:column;gap:34px;
    padding:104px var(--gutter) 44px;
    overflow-y:auto;
    background:linear-gradient(180deg,var(--ink),var(--ink-deep) 70%);
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
  }
  .site-nav[data-open]{opacity:1;visibility:visible;transform:none}
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0}
  .site-nav__link{
    width:100%;justify-content:flex-start;
    font-size:26px;font-weight:800;letter-spacing:-.01em;
    padding:16px 0;border-bottom:1px solid var(--line);color:var(--ice);
  }
  .site-nav__link[aria-current="page"]{color:var(--gold);border-bottom-color:var(--gold)}
  .site-nav__num{font-size:12px}
  .drawer-cats{display:block}
}
@media (max-width:760px){
  :root{--gutter:18px}
  body{font-size:16px}
  .section{padding:52px 0}
  .section--tight{padding:36px 0}
  .action-bar__sign{font-size:12px}
  .action-bar__right{gap:8px}
  .brand-layer{max-height:96px}
  .brand-layer__inner{min-height:44px;padding-block:8px}
  .brand-layer__note{
    display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;
    font-size:13px;
  }
  .brand-layer__meta{gap:8px;font-size:11px}
  .brand-layer__meta .brand-layer__dot,.brand-layer__meta .mono{display:none}
  .brand-layer__more{display:inline-block}
  .brand-layer[data-open] .brand-layer__note{-webkit-line-clamp:4}
  .drawer-cats__list{grid-template-columns:minmax(0,1fr)}
  .site-footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .site-footer__base{justify-content:flex-start}
  .paper{padding:18px;box-shadow:4px 4px 0 rgba(14,156,146,.18),8px 8px 0 rgba(243,178,63,.12)}
  .grid{gap:18px}
}
@media (max-width:460px){
  .action-bar__sign{max-width:44vw}
  .grid--2{grid-template-columns:minmax(0,1fr)}
}

@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}
}