/* ============================================================
   银娱电子志 · /assets/site.css
   共享外壳：reset / tokens / 中文排版 / 页头 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --ink:#0A1224;
  --ink-2:#101E3A;
  --ink-3:#16264A;
  --green:#0C2A2C;
  --wine:#5A1F2B;
  --indigo:#4A3ACB;
  --cyan:#34E3D0;
  --neon:#8B6CFF;
  --gold:#E4B15C;
  --silver:#C6CFDB;
  --frost:#F3F6FA;
  --mist:#7C8CA3;

  --line:rgba(198,207,219,.22);
  --line-strong:rgba(52,227,208,.55);

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

  --bar-h:64px;
  --bar-h-min:46px;
  --index-h:40px;
  --container:1360px;
  --gutter:clamp(16px,4vw,40px);
  --track:240px;
  --shadow-hard:4px 4px 0 rgba(0,0,0,.55);
  --shadow-mid:2px 2px 0 rgba(0,0,0,.5);
  --shadow-lift:6px 6px 0 rgba(0,0,0,.5);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:128px}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd,table,th,td{margin:0;padding:0}
ul,ol{list-style:none}
img,picture,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}
a{color:inherit}
:focus-visible{outline:2px solid var(--neon);outline-offset:3px}
#main-content{display:block}
#main-content:focus{outline:none}

/* ---------- 3. 中文排版 ---------- */
body{
  background:var(--ink);
  color:var(--frost);
  font-family:var(--font-body);
  font-size:17px;
  font-weight:400;
  line-height:1.9;
  letter-spacing:.005em;
}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:900;line-height:1.15;letter-spacing:-.012em}
h1{font-size:clamp(32px,4.2vw,56px)}
h2{font-size:clamp(24px,2.6vw,36px)}
h3{font-size:clamp(19px,1.7vw,26px)}
h4{font-size:18px}
p{max-width:40ch}
p.wide,li p{max-width:none}
strong{font-weight:900;color:var(--frost)}
p a,li a.inline{color:var(--cyan);text-decoration:underline;text-underline-offset:3px}
p a:hover{color:var(--frost)}
.mono{font-family:var(--font-mono);font-size:.88em;letter-spacing:.06em;color:var(--mist)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;
  color:var(--cyan);text-transform:uppercase;
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--cyan)}

/* ---------- 4. 布局容器 ---------- */
.wrap{width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto}
.wrap-wide{width:min(100% - var(--gutter) * 2,1560px);margin-inline:auto}
.wrap-narrow{width:min(100% - var(--gutter) * 2,760px);margin-inline:auto}
.section{padding-block:clamp(48px,7vw,88px)}
.section--tight{padding-block:clamp(32px,4.5vw,56px)}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;border-bottom:2px solid var(--line);
  padding-bottom:16px;margin-bottom:clamp(24px,3vw,40px);
}
.section-title{font-family:var(--font-display);font-weight:900;font-size:clamp(23px,2.4vw,32px);line-height:1.15}
.section-note{font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;color:var(--mist);max-width:46ch}
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-auto{grid-template-columns:repeat(auto-fit,minmax(255px,1fr))}

/* ---------- 5. 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.05em;color:var(--mist);
}
.crumbs li{display:flex;align-items:center}
.crumbs li+li::before{content:"/";margin:0 10px;color:var(--indigo)}
.crumbs a{color:var(--silver);text-decoration:none;border-bottom:1px solid transparent}
.crumbs a:hover{color:var(--cyan);border-color:var(--cyan)}
.crumbs [aria-current="page"]{color:var(--cyan)}

/* ---------- 6. 按钮 / 标签 / 筹码 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border:2px solid var(--silver);background:transparent;color:var(--frost);
  font-family:var(--font-body);font-weight:700;font-size:15px;line-height:1.2;letter-spacing:.02em;
  text-decoration:none;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-ghost{background:transparent}
.btn-solid{background:var(--cyan);border-color:var(--cyan);color:var(--ink);box-shadow:4px 4px 0 var(--indigo)}
.btn-solid:hover{background:var(--frost);border-color:var(--frost);color:var(--ink);box-shadow:6px 6px 0 var(--indigo)}
.btn-block{width:100%}

.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 9px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  background:var(--indigo);border:1px solid var(--neon);color:var(--frost);white-space:nowrap;
}
.tag--cyan{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}
.tag--gold{background:var(--gold);border-color:var(--gold);color:var(--ink)}
.tag--wine{background:var(--wine);border-color:var(--wine);color:var(--frost)}

.chip{
  display:inline-flex;align-items:center;gap:8px;padding:8px 12px;
  background:var(--ink-2);border:2px solid var(--line);color:var(--silver);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;text-decoration:none;
  transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);
}
.chip:hover{border-color:var(--cyan);color:var(--frost)}
.chip[aria-pressed="true"]{background:var(--cyan);border-color:var(--cyan);color:var(--ink)}

/* ---------- 7. 基础组件 ---------- */
.card{
  background:var(--ink-2);border:2px solid var(--line);box-shadow:var(--shadow-mid);
  padding:clamp(18px,2.4vw,26px);
  transition:border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.card:hover{border-color:var(--cyan);box-shadow:var(--shadow-lift)}
.panel{
  background:var(--ink-2);border:2px solid var(--line);
  padding:clamp(20px,3vw,32px);
}
.note{
  border-left:3px solid var(--wine);background:rgba(90,31,43,.28);
  padding:14px 18px;color:var(--silver);font-size:15px;line-height:1.85;
}
.note p{max-width:none}
.matrix{font-size:15px;line-height:1.7}
.matrix th{
  background:var(--gold);color:var(--ink);font-family:var(--font-display);font-weight:900;
  text-align:left;padding:12px 14px;border:2px solid var(--gold);white-space:nowrap;
}
.matrix td{padding:12px 14px;border:1px solid var(--line);color:var(--silver);vertical-align:top}
.matrix tbody tr:hover td{background:rgba(52,227,208,.06)}
.disclosure{border:2px solid var(--line);background:var(--ink-2);margin-bottom:12px}
.disclosure summary{
  display:flex;align-items:baseline;gap:12px;padding:16px 18px;
  font-weight:700;font-size:16px;cursor:pointer;list-style:none;
}
.disclosure summary::-webkit-details-marker{display:none}
.disclosure summary::before{content:"+";font-family:var(--font-mono);color:var(--cyan);font-weight:400}
.disclosure[open] summary::before{content:"–"}
.disclosure[open] summary{color:var(--cyan);border-bottom:1px solid var(--line)}
.disclosure-body{padding:16px 18px;color:var(--silver);font-size:16px}
.disclosure-body p{max-width:none}
.field{display:block;margin-bottom:20px}
.field-label{display:block;margin-bottom:8px;font-family:var(--font-mono);font-size:13px;letter-spacing:.1em;color:var(--cyan)}
.field input,.field textarea,.field select{
  width:100%;padding:12px 14px;background:var(--ink);border:2px solid var(--line);
  color:var(--frost);font-family:var(--font-body);font-size:16px;line-height:1.7;
}
.field textarea{min-height:140px;resize:vertical}
.field input:focus-visible,.field textarea:focus-visible{border-color:var(--cyan)}
.field-hint{display:block;margin-top:6px;font-family:var(--font-mono);font-size:12px;color:var(--mist)}

/* ---------- 8. 图片基座（页面阶段放置素材） ---------- */
.media{
  position:relative;overflow:hidden;background:var(--ink-2);
  border:2px solid var(--line);box-shadow:var(--shadow-hard);
}
.media img,.media picture,.media picture img{width:100%;height:100%;object-fit:cover;display:block}
.media-16x9{aspect-ratio:16/9}
.media-4x3{aspect-ratio:4/3}
.media-3x2{aspect-ratio:3/2}
.media-1x1{aspect-ratio:1/1}
.media-fallback{
  display:grid;place-items:center;
  background-color:var(--green);
  background-image:
    repeating-linear-gradient(0deg,rgba(52,227,208,.16) 0 1px,transparent 1px 48px),
    repeating-linear-gradient(90deg,rgba(52,227,208,.16) 0 1px,transparent 1px 48px);
}
.media-fallback span{font-family:var(--font-mono);font-size:13px;letter-spacing:.2em;color:var(--cyan)}

/* ---------- 9. 页头 ---------- */
.skip-link{
  position:fixed;left:var(--gutter);top:-96px;z-index:300;
  padding:10px 16px;background:var(--cyan);color:var(--ink);
  font-weight:900;text-decoration:none;border:2px solid var(--ink);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:16px}

.site-header{
  position:sticky;top:0;z-index:120;
  background:var(--ink);border-bottom:2px solid var(--line);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-condensed{box-shadow:0 5px 0 rgba(0,0,0,.4)}

.cmd-bar{
  display:flex;align-items:center;gap:clamp(12px,2vw,28px);
  height:var(--bar-h);
  width:min(100% - var(--gutter) * 2,var(--container));
  margin-inline:auto;
  transition:height .2s var(--ease);
}
.site-header.is-condensed .cmd-bar{height:var(--bar-h-min)}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto;text-decoration:none;color:var(--frost)}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;
  background:var(--cyan);color:var(--ink);border:2px solid var(--frost);
  font-family:var(--font-display);font-weight:900;font-size:19px;line-height:1;
  box-shadow:4px 4px 0 var(--indigo);
  transition:width .2s var(--ease),height .2s var(--ease),font-size .2s var(--ease);
}
.brand-text{display:flex;flex-direction:column;line-height:1.16}
.brand-name{font-family:var(--font-display);font-weight:900;font-size:19px;letter-spacing:.02em}
.brand-domain{font-family:var(--font-mono);font-size:11px;letter-spacing:.09em;color:var(--mist)}
.site-header.is-condensed .brand-mark{width:28px;height:28px;font-size:15px;box-shadow:3px 3px 0 var(--indigo)}
.site-header.is-condensed .brand-domain{display:none}

.cmd-nav{display:flex;flex:1 1 auto;align-items:center;justify-content:center;gap:14px;min-width:0}
.cmd-nav-list{display:flex;align-items:center;gap:2px;flex-wrap:wrap}
.cmd-nav-list a{
  position:relative;display:inline-flex;align-items:center;gap:8px;
  padding:8px 10px;color:var(--silver);text-decoration:none;
  font-weight:700;font-size:15px;line-height:1.2;
  transition:color .2s var(--ease),padding .2s var(--ease),font-size .2s var(--ease);
}
.cmd-nav-list a::after{
  content:"";position:absolute;left:8px;right:8px;bottom:0;height:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left center;
  transition:transform .3s var(--ease);
}
.cmd-nav-list a:hover{color:var(--frost)}
.cmd-nav-list a:hover::after,
.cmd-nav-list a[aria-current="page"]::after{transform:scaleX(1)}
.cmd-nav-list a[aria-current="page"]{color:var(--cyan)}
.cmd-nav-list a[aria-current="page"] .nav-idx{color:var(--frost)}
.nav-idx{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);font-weight:400}
.nav-label{white-space:nowrap}
.cmd-nav-cta{display:none}

.site-header.is-condensed .cmd-nav-list a{padding-block:4px;font-size:14px}

.cmd-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.status{
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 0 3px rgba(52,227,208,.2);
  animation:status-pulse 2.6s var(--ease) infinite;
}
@keyframes status-pulse{0%,100%{opacity:1}50%{opacity:.3}}
.site-header.is-condensed .btn{padding:6px 12px;font-size:14px}
.site-header.is-condensed .btn-solid{box-shadow:2px 2px 0 var(--indigo)}

.nav-toggle{
  display:none;align-items:center;gap:10px;padding:8px 12px;
  border:2px solid var(--silver);color:var(--frost);
  font-family:var(--font-mono);font-size:13px;letter-spacing:.08em;line-height:1;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan)}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:currentColor}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;
  transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars{background:transparent}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
[data-nav-toggle][aria-expanded="true"] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

.index-bar{background:var(--ink-2);border-top:1px solid var(--line)}
.index-bar-inner{
  display:flex;align-items:center;gap:18px;height:var(--index-h);
  width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto;
  overflow-x:auto;scrollbar-width:none;
}
.index-bar-inner::-webkit-scrollbar{display:none}
.index-bar-label{
  flex:0 0 auto;padding-left:8px;border-left:2px solid var(--cyan);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--mist);white-space:nowrap;
}
.index-bar-list{display:flex;align-items:center;gap:4px}
.index-bar-list a{
  display:inline-flex;align-items:center;gap:8px;padding:6px 10px;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.05em;color:var(--silver);
  text-decoration:none;white-space:nowrap;
  transition:background-color .2s var(--ease),color .2s var(--ease);
}
.index-bar-list a .mono{color:inherit;opacity:.68}
.index-bar-list a:hover{color:var(--cyan)}
.index-bar-list a[aria-current="page"]{background:var(--cyan);color:var(--ink)}

.scroll-progress{
  position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--cyan);transition:width .1s linear;
}

/* ---------- 10. 页脚 ---------- */
.site-footer{
  position:relative;margin-top:clamp(64px,8vw,112px);
  background:var(--ink-2);border-top:2px solid var(--line);
}
.footer-ribbon{
  display:block;height:8px;
  background:linear-gradient(90deg,
    var(--green) 0 33.34%,
    var(--wine) 33.34% 66.67%,
    var(--indigo) 66.67% 100%);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.5fr;
  gap:clamp(24px,4vw,48px);
  width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto;
  padding-block:clamp(40px,5vw,64px) clamp(28px,3.4vw,44px);
}
.footer-mark{font-family:var(--font-display);font-weight:900;font-size:24px;letter-spacing:.02em;line-height:1.2}
.footer-line{margin-top:14px;color:var(--silver);font-size:15px;line-height:1.8;max-width:36ch}
.footer-line--muted{margin-top:10px;font-family:var(--font-mono);font-size:13px;letter-spacing:.06em;color:var(--mist)}
.footer-title{
  margin-bottom:16px;font-family:var(--font-mono);font-weight:700;
  font-size:12px;letter-spacing:.18em;color:var(--cyan);
}
.footer-list li+li{margin-top:10px}
.footer-list a{
  color:var(--silver);font-size:15px;text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-list a:hover{color:var(--cyan);border-color:var(--cyan)}
.footer-contact li{color:var(--silver);font-size:15px;line-height:1.75}
.footer-contact li+li{margin-top:14px}
.footer-contact .mono{display:block;margin-bottom:2px;font-size:12px;letter-spacing:.14em;color:var(--gold)}
.footer-meta{
  width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto;
  padding-block:16px;border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.04em;color:var(--mist);line-height:1.8;
}
.footer-meta p{max-width:78ch}
.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;
  padding:16px max(var(--gutter),calc((100% - var(--container)) / 2));
  background:var(--ink);border-top:1px solid var(--line);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.footer-legal a{color:var(--mist);text-decoration:none;border-bottom:1px solid var(--line)}
.footer-legal a:hover{color:var(--cyan);border-color:var(--cyan)}

/* ---------- 11. 显现动效协议 ---------- */
.js [data-reveal]{
  opacity:0;transform:translateY(12px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 12. 响应式 ---------- */
@media (max-width:1240px){
  .status{display:none}
}
@media (max-width:1180px){
  .cmd-nav-list a{font-size:14px;padding:6px 8px}
  .cmd-nav-list a::after{left:6px;right:6px}
}
@media (max-width:980px){
  html{scroll-padding-top:112px}
  .cmd-nav{
    position:absolute;top:100%;left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:0;
    padding:14px var(--gutter) 26px;
    background:var(--ink-2);border-bottom:2px solid var(--cyan);
    max-height:calc(100vh - 120px);overflow-y:auto;
    box-shadow:0 6px 0 rgba(0,0,0,.4);
  }
  .cmd-nav[data-open]{display:flex}
  .cmd-nav-list{flex-direction:column;align-items:stretch;gap:0}
  .cmd-nav-list a{
    justify-content:flex-start;gap:14px;padding:15px 4px;
    font-size:17px;border-bottom:1px solid var(--line);
  }
  .cmd-nav-list a::after{display:none}
  .cmd-nav-list a[aria-current="page"]{padding-left:12px;border-left:3px solid var(--cyan)}
  .cmd-nav-cta{display:flex;gap:12px;margin-top:20px}
  .cmd-nav-cta .btn{flex:1 1 0}
  .cmd-tools .btn{display:none}
  .nav-toggle{display:inline-flex}
  .brand-domain{display:none}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:720px){
  body{font-size:16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .index-bar-label{display:none}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-legal{justify-content:flex-start}
  .matrix{display:block;overflow-x:auto;white-space:nowrap}
}

/* ---------- 13. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .status-dot{animation:none}
  .scroll-progress{transition:none}
}