/* ============================================================
   九号娱乐中心 — /assets/site.css
   共享外壳：框架式导轨页头 + 出版信息板页脚 + 通用组件
   ============================================================ */

/* ---------- Tokens ---------- */
:root{
  --ink:#0B0D12;
  --espresso:#1A120E;
  --panel:#121722;
  --cream:#F2F0E9;
  --mist:#B9C2D0;
  --mint:#43F5C8;
  --violet:#A56BFF;
  --amber:#FF8A3D;
  --coral:#FF5C7A;
  --line:#2E3A4E;

  --max:1320px;
  --gutter:clamp(16px,4vw,56px);
  --header-h:68px;

  --font-sans:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --ease:cubic-bezier(.2,.7,.3,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  background:var(--ink);
  scroll-behavior:smooth;
}
body{
  margin:0;
  min-height:100vh;
  background-color:var(--ink);
  background-image:
    radial-gradient(760px 460px at 92% -6%, rgba(165,107,255,.18), transparent 68%),
    radial-gradient(620px 420px at 2% 0%, rgba(67,245,200,.12), transparent 70%);
  background-repeat:no-repeat;
  background-size:100% 900px, 100% 700px;
  background-position:0 0, 0 0;
  color:var(--cream);
  font-family:var(--font-sans);
  font-size:clamp(16px,1.05vw,17px);
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,picture,video,svg{max-width:100%}
h1,h2,h3,h4,h5{
  margin:0;
  font-weight:900;
  line-height:1.05;
  letter-spacing:-.015em;
  color:var(--cream);
}
h1{font-size:clamp(34px,6vw,72px)}
h2{font-size:clamp(26px,3.6vw,44px)}
h3{font-size:clamp(19px,2vw,24px);line-height:1.2;letter-spacing:0}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1.05em;padding-left:1.2em}
a{color:var(--mint);text-decoration:none;text-underline-offset:3px}
a:hover{text-decoration:underline}
button{font-family:inherit}
::selection{background:var(--violet);color:#0B0D12}
[id]{scroll-margin-top:calc(var(--header-h) + 18px)}
:where(a,button,[tabindex]):focus-visible{
  outline:2px solid var(--amber);
  outline-offset:3px;
}

/* ---------- Layout utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(40px,6vw,88px)}
.grid{display:grid;gap:clamp(16px,2.4vw,32px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--split{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}
.divider{height:1px;border:0;margin:0;background:var(--line)}

/* ---------- Type utilities ---------- */
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--violet);
}
.eyebrow::before{content:"";width:22px;height:1px;background:currentColor;flex:none}
.lede{
  font-size:clamp(16px,1.5vw,19px);
  line-height:1.7;
  color:var(--mist);
  max-width:62ch;
}

/* ---------- Chips & tags ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 9px;
  border:1px solid var(--line);
  background:rgba(18,23,34,.72);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  white-space:nowrap;
}
.tag--mint{color:var(--mint);border-color:rgba(67,245,200,.45);background:rgba(67,245,200,.07)}
.tag--violet{color:var(--violet);border-color:rgba(165,107,255,.45);background:rgba(165,107,255,.08)}
.tag--amber{color:var(--amber);border-color:rgba(255,138,61,.5);background:rgba(255,138,61,.08)}

/* ---------- Panels ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.4vw,28px);
}
.panel--glow{
  border-color:rgba(67,245,200,.35);
  box-shadow:0 0 0 1px rgba(67,245,200,.07), 0 22px 56px -34px rgba(67,245,200,.55);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.6em;
  padding:.82em 1.35em;
  border:1px solid var(--mint);
  background:transparent;
  color:var(--mint);
  font-family:inherit;
  font-size:.94rem;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn:hover{background:var(--mint);color:#04110D;text-decoration:none}
.btn--solid{background:var(--mint);color:#04110D}
.btn--solid:hover{background:#7CFFDD;border-color:#7CFFDD}
.btn--ghost{border-color:var(--line);color:var(--cream)}
.btn--ghost:hover{border-color:var(--violet);background:transparent;color:var(--violet)}

/* ---------- Breadcrumbs ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--mist);
  margin:0;
  padding:0;
  list-style:none;
}
.crumbs li{display:inline-flex;align-items:center;gap:.5em}
.crumbs li + li::before{content:"/";color:var(--line)}
.crumbs a{color:var(--mist);text-decoration:none}
.crumbs a:hover{color:var(--mint);text-decoration:none}
.crumbs [aria-current="page"]{color:var(--mint)}

/* ---------- Kbd ---------- */
.kbd{
  display:inline-block;
  padding:1px 6px;
  border:1px solid var(--line);
  background:rgba(46,58,78,.25);
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:.82em;
  letter-spacing:.04em;
}

/* ---------- Media frame ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  border:1px solid var(--line);
  background:linear-gradient(140deg,#121722,#0B0D12 62%);
}
.media-frame img{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(112deg,transparent 42%,rgba(67,245,200,.14) 49%,rgba(165,107,255,.16) 55%,transparent 63%);
  opacity:.85;
}
.media-frame--21x9{aspect-ratio:21/9}
.media-frame--16x9{aspect-ratio:16/9}
.media-frame--4x3{aspect-ratio:4/3}
.media-frame--1x1{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  display:block;
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ---------- Reveal ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(14px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
}
[data-reveal][data-revealed]{opacity:1;transform:none}

/* ============================================================
   HEADER — 框架式控制台导轨
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto auto;
  align-items:center;
  gap:clamp(10px,2vw,30px);
  min-height:var(--header-h);
  padding:0 var(--gutter);
  background:rgba(11,13,18,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px) saturate(120%);
  backdrop-filter:blur(12px) saturate(120%);
}
.site-header::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--mint),var(--violet) 42%,var(--amber) 74%,rgba(255,92,122,.65));
  pointer-events:none;
}

.skip-link{
  position:absolute;
  left:var(--gutter);
  top:-72px;
  z-index:200;
  padding:10px 16px;
  background:var(--mint);
  color:#04110D;
  font-weight:700;
  font-size:13px;
  text-decoration:none;
  transition:top .2s var(--ease);
}
.skip-link:focus{top:10px;text-decoration:none}

.header-rail{
  display:flex;
  align-items:center;
  gap:clamp(10px,1.6vw,18px);
  min-width:0;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 0;
  color:var(--cream);
  text-decoration:none;
}
.brand:hover{text-decoration:none}
.brand-mark{
  display:grid;
  place-items:center;
  flex:none;
  width:34px;
  height:34px;
  border:1px solid var(--violet);
  box-shadow:inset 0 0 12px rgba(165,107,255,.35);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:16px;
  font-weight:700;
}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{
  display:block;
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  letter-spacing:.02em;
  white-space:nowrap;
  color:var(--cream);
}
.brand-sub{
  display:block;
  font-family:var(--font-mono);
  font-size:9.5px;
  line-height:1.2;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(185,194,208,.72);
  white-space:nowrap;
}
.version-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:5px 10px;
  border:1px solid rgba(255,138,61,.45);
  background:rgba(255,138,61,.08);
  color:var(--amber);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  white-space:nowrap;
}
.version-chip-dot{
  width:6px;
  height:6px;
  flex:none;
  background:var(--amber);
  animation:chipPulse 2.6s ease-out infinite;
}
@keyframes chipPulse{
  0%{box-shadow:0 0 0 0 rgba(255,138,61,.55)}
  70%{box-shadow:0 0 0 7px rgba(255,138,61,0)}
  100%{box-shadow:0 0 0 0 rgba(255,138,61,0)}
}

.site-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(6px,1.4vw,22px);
  counter-reset:navidx;
  min-width:0;
}
.site-nav a{
  position:relative;
  display:inline-flex;
  align-items:baseline;
  gap:6px;
  padding:9px 2px;
  color:var(--mist);
  font-size:13.5px;
  letter-spacing:.02em;
  white-space:nowrap;
  text-decoration:none;
  transition:color .18s var(--ease);
}
.site-nav a::before{
  counter-increment:navidx;
  content:"0" counter(navidx);
  font-family:var(--font-mono);
  font-size:9.5px;
  letter-spacing:.06em;
  color:rgba(165,107,255,.75);
  transition:color .18s var(--ease);
}
.site-nav a::after{
  content:"";
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:1px;
  background:var(--mint);
  transform:scaleX(0);
  transform-origin:0 50%;
  transition:transform .22s var(--ease);
}
.site-nav a:hover{color:var(--cream);text-decoration:none}
.site-nav a:hover::after{transform:scaleX(1)}
.site-nav a[aria-current="page"]{color:var(--mint)}
.site-nav a[aria-current="page"]::after{transform:scaleX(1)}
.site-nav a[aria-current="page"]::before{color:var(--amber)}

.header-tools{display:flex;align-items:center;gap:8px}
.tool-search{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 12px;
  border:1px solid rgba(67,245,200,.55);
  background:rgba(67,245,200,.08);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  white-space:nowrap;
  text-decoration:none;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.tool-search::before{content:"⌕";font-size:13px;line-height:1}
.tool-search:hover{background:var(--mint);color:#04110D;text-decoration:none}
.tool-home{
  padding:7px 10px;
  border:1px solid var(--line);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  white-space:nowrap;
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.tool-home:hover{color:var(--mint);border-color:var(--mint);text-decoration:none}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  width:44px;
  height:40px;
  padding:0;
  border:1px solid var(--violet);
  background:rgba(165,107,255,.09);
  color:var(--cream);
  cursor:pointer;
}
.nav-toggle-line{
  display:block;
  width:18px;
  height:1.5px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.site-header[data-open] .nav-toggle-line:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-line:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-line:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  z-index:2;
  background:linear-gradient(90deg,var(--mint),var(--violet));
  transform:scaleX(0);
  transform-origin:0 50%;
  pointer-events:none;
}

/* ============================================================
   FOOTER — 复古出版信息板
   ============================================================ */
.site-footer{
  position:relative;
  margin-top:clamp(56px,9vw,112px);
  background:var(--espresso);
  background-image:linear-gradient(180deg,rgba(165,107,255,.07),transparent 42%);
  border-bottom:1px solid rgba(255,138,61,.28);
  color:var(--mist);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  background:linear-gradient(90deg,var(--amber),var(--violet) 45%,var(--mint) 82%,transparent);
}
.footer-top{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(24px,3.6vw,48px);
  padding-top:clamp(38px,6vw,68px);
  padding-bottom:clamp(24px,3.4vw,44px);
}
.footer-brand{min-width:0}
.footer-wordmark{
  display:block;
  font-size:clamp(24px,3.4vw,40px);
  font-weight:900;
  line-height:1.05;
  letter-spacing:-.012em;
  color:var(--cream);
}
.footer-tagline{
  margin:.7em 0 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(185,194,208,.72);
}
.footer-version{
  margin:1.15em 0 0;
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
}
.footer-version .mono{color:var(--amber);font-size:12px}

.footer-col{min-width:0}
.footer-heading{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--amber);
}
.footer-list{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  gap:9px;
}
.footer-list li{margin:0}
.footer-list a,
.footer-list button{
  display:inline-block;
  padding:0;
  border:0;
  background:none;
  color:var(--mist);
  font-family:inherit;
  font-size:14px;
  line-height:1.6;
  text-align:left;
  text-decoration:none;
  cursor:pointer;
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-list a:hover,
.footer-list button:hover{color:var(--mint);transform:translateX(3px);text-decoration:none}

.footer-contact .contact-row{
  display:grid;
  gap:3px;
  margin:0 0 14px;
}
.footer-contact .contact-row:last-child{margin-bottom:0}
.footer-label{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:rgba(165,107,255,.92);
}
.contact-value{
  font-size:13.5px;
  line-height:1.65;
  color:var(--mist);
  overflow-wrap:anywhere;
}
.copy-mail{
  display:inline-flex;
  align-items:center;
  gap:8px;
  max-width:100%;
  padding:3px 8px 3px 0;
  border:0;
  background:none;
  color:var(--cream);
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.02em;
  text-align:left;
  cursor:pointer;
  overflow-wrap:anywhere;
  transition:color .18s var(--ease);
}
.copy-mail-text{border-bottom:1px dashed rgba(67,245,200,.45)}
.copy-mail:hover{color:var(--mint)}
.copy-mail-hint{
  flex:none;
  padding:1px 6px;
  border:1px solid rgba(255,138,61,.5);
  background:rgba(255,138,61,.1);
  color:var(--amber);
  font-size:10px;
  letter-spacing:.08em;
}
.copy-mail[data-copied] .copy-mail-hint{
  border-color:rgba(67,245,200,.6);
  background:rgba(67,245,200,.14);
  color:var(--mint);
}

.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding-top:18px;
  padding-bottom:26px;
  border-top:1px solid rgba(46,58,78,.85);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.06em;
  color:rgba(185,194,208,.8);
}
.footer-base p{margin:0}
.footer-icp{color:rgba(255,138,61,.85)}

.to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(14px,3vw,28px);
  z-index:70;
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  padding:0;
  border:1px solid var(--mint);
  background:rgba(18,23,34,.92);
  color:var(--mint);
  font-family:var(--font-mono);
  font-size:15px;
  line-height:1;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--mint);color:#04110D}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1180px){
  .site-nav{gap:clamp(9px,1.6vw,18px)}
  .site-nav a{font-size:13px;padding:9px 0}
  .site-nav a::before{display:none}
  .brand-sub{display:none}
}

@media (max-width:1040px){
  .site-header{
    grid-template-columns:minmax(0,1fr) auto;
    align-items:center;
    gap:0 12px;
    padding:8px var(--gutter);
  }
  .header-rail{grid-column:1;grid-row:1}
  .nav-toggle{display:inline-flex;grid-column:2;grid-row:1}
  .site-nav{
    grid-column:1 / -1;
    grid-row:2;
    display:none;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    margin-top:10px;
    padding-top:6px;
    border-top:1px solid var(--line);
  }
  .site-header[data-open] .site-nav{display:flex}
  .site-nav a{
    justify-content:space-between;
    align-items:center;
    padding:13px 2px;
    font-size:15px;
    border-bottom:1px solid rgba(46,58,78,.55);
  }
  .site-nav a::before{display:block;font-size:10px}
  .site-nav a::after{display:none}
  .site-nav a[aria-current="page"]{color:var(--mint)}
  .header-tools{
    display:none;
    grid-column:1 / -1;
    grid-row:3;
    flex-wrap:wrap;
    gap:10px;
    padding:14px 0 6px;
  }
  .site-header[data-open] .header-tools{display:flex}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}

@media (max-width:760px){
  :root{--header-h:64px}
  .grid--2,.grid--3,.grid--split{grid-template-columns:minmax(0,1fr)}
  .footer-base{font-size:10.5px}
}

@media (max-width:560px){
  .version-chip{display:none}
  .brand-name{font-size:14px}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-brand{grid-column:auto}
  .to-top{width:42px;height:42px}
}

/* ---------- Motion preferences ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .to-top{transition:none}
}