/* ============================================================
   龙珠主页 · 共享样式表 /assets/site.css
   深空档案 · 堆叠面板 · 星轨演播厅
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root{
  --ink-0:#0B1220;
  --ink-1:#121C33;
  --ink-2:#182444;
  --line:#25324D;
  --orange:#FF6B1A;
  --orange-bright:#FF8A3D;
  --cyan:#00E5FF;
  --gold:#FFC857;
  --paper:#F4F7FF;
  --muted:#7C8BA1;
  --ok:#2EE6A8;
  --warn:#FF5C7A;

  --font-display:'Barlow Condensed','PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Consolas,'Courier New',monospace;

  --wrap:1180px;
  --gutter:24px;
  --radius:0;
  --lift:0 22px 46px -30px rgba(0,229,255,.6);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  background-color:var(--ink-0);
}
body{
  margin:0;
  background:transparent;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.8;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(circle at 10% -8%, rgba(255,107,26,.16), transparent 42%),
    radial-gradient(circle at 94% 2%, rgba(0,229,255,.11), transparent 46%),
    linear-gradient(180deg, rgba(37,50,77,.30) 0%, transparent 34%);
}
h1,h2,h3,h4,h5,h6{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.15;
  color:var(--paper);
}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
a{color:var(--cyan);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--orange-bright);}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;}
img,svg,video{display:block;max-width:100%;}
hr{border:0;border-top:1px solid var(--line);margin:0;}
::selection{background:var(--orange);color:var(--ink-0);}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}

/* ---------- 3. Utilities ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.mono{font-family:var(--font-mono);font-weight:500;}

.section{padding-block:clamp(56px,8vw,112px);}
.section--tight{padding-block:clamp(32px,4.5vw,60px);}
.section--alt{
  background:var(--ink-1);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.eyebrow{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--cyan);
}
.section-title{font-size:clamp(28px,4.4vw,42px);margin:0 0 14px;}
.section-lede{color:var(--muted);max-width:62ch;font-size:16.5px;margin:0;}

.grid{display:grid;gap:clamp(16px,2.2vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}

.rail{
  display:flex;
  gap:16px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:14px;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.rail > *{flex:0 0 clamp(238px,32vw,320px);scroll-snap-align:start;}
.rail::-webkit-scrollbar{height:6px;}
.rail::-webkit-scrollbar-thumb{background:var(--line);}

/* ---------- 4. Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:var(--radius);
  font-family:var(--font-body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-primary{background:var(--orange);color:var(--ink-0);}
.btn-primary:hover{background:var(--orange-bright);color:var(--ink-0);transform:translateY(-1px);}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn-sm{padding:9px 15px;font-size:13px;}

/* ---------- 5. Cards / Archive parts ---------- */
.card{
  position:relative;
  background:var(--ink-1);
  border:1px solid var(--line);
  padding:clamp(18px,2.2vw,26px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-3px);border-color:rgba(0,229,255,.45);box-shadow:var(--lift);}
.panel{background:var(--ink-1);border:1px solid var(--line);padding:clamp(20px,3vw,36px);}

.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 10px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--muted);
}
.tag--gold{color:var(--gold);border-color:rgba(255,200,87,.42);}
.tag--cyan{color:var(--cyan);border-color:rgba(0,229,255,.42);}

.disclosure{border:1px solid var(--line);background:rgba(11,18,32,.55);}
.disclosure + .disclosure{margin-top:-1px;}
.disclosure summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:15px 20px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.disclosure summary::-webkit-details-marker{display:none;}
.disclosure summary::after{
  content:"+";
  font-family:var(--font-mono);
  color:var(--cyan);
  font-size:16px;
  line-height:1;
}
.disclosure[open] summary::after{content:"–";}
.disclosure[open] summary{color:var(--orange-bright);}
.disclosure-body{padding:0 20px 20px;color:var(--muted);font-size:15px;}

/* ---------- 6. Tabs / Segmented ---------- */
.tabs{
  display:flex;
  flex-wrap:wrap;
  gap:2px;
  border-bottom:1px solid var(--line);
}
.tab{
  padding:12px 18px;
  border-bottom:2px solid transparent;
  font-size:14.5px;
  font-weight:500;
  letter-spacing:.04em;
  color:var(--muted);
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.tab:hover{color:var(--paper);background:rgba(255,107,26,.07);}
.tab[aria-selected="true"]{color:var(--orange);border-bottom-color:var(--orange);}
.tabpanel{padding-top:24px;}
.tabpanel[hidden]{display:none;}

.segmented{
  display:inline-flex;
  gap:3px;
  padding:3px;
  border:1px solid var(--line);
  background:rgba(11,18,32,.6);
}
.segmented button{
  padding:8px 16px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
  transition:background .2s ease,color .2s ease;
}
.segmented button:hover{color:var(--cyan);}
.segmented button[aria-selected="true"]{background:var(--orange);color:var(--ink-0);}

/* ---------- 7. Breadcrumb / Prose / Media ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.1em;
  color:var(--muted);
}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li + li::before{content:"/";color:var(--line);}
.breadcrumb a{color:var(--muted);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--gold);}

.prose{max-width:68ch;font-size:16.5px;line-height:1.9;color:rgba(244,247,255,.87);}
.prose h2{font-size:clamp(24px,3vw,32px);margin:2.2em 0 .6em;}
.prose h3{font-size:clamp(19px,2.2vw,23px);margin:1.8em 0 .5em;}
.prose p{margin:0 0 1.15em;}
.prose ul,.prose ol{margin:0 0 1.3em;padding-left:1.15em;}
.prose li{list-style:disc;margin-bottom:.5em;}
.prose ol li{list-style:decimal;}
.prose strong{color:var(--paper);}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  color:var(--gold);
  background:rgba(255,200,87,.09);
  padding:1px 6px;
}

.media{
  position:relative;
  display:block;
  width:100%;
  margin:0;
  background:var(--ink-1);
  border:1px solid var(--line);
  overflow:hidden;
}
.media img,
.media svg,
.media video{width:100%;height:100%;object-fit:cover;}
.media--16x9{aspect-ratio:16/9;}
.media--4x3{aspect-ratio:4/3;}
.media--1x1{aspect-ratio:1/1;}
.media--wide{aspect-ratio:21/9;}
.media--orbit::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 28% 30%, rgba(255,107,26,.34), transparent 58%),
    radial-gradient(circle at 76% 68%, rgba(0,229,255,.28), transparent 56%);
  pointer-events:none;
}
.media-caption{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.08em;
  color:var(--muted);
  margin-top:10px;
}

/* ---------- 8. Skip link ---------- */
.skip-link{
  position:absolute;
  left:16px;
  top:-80px;
  z-index:200;
  padding:10px 18px;
  background:var(--orange);
  color:var(--ink-0);
  font-size:14px;
  font-weight:700;
  letter-spacing:.04em;
  transition:top .2s ease;
}
.skip-link:focus{top:14px;color:var(--ink-0);}

/* ---------- 9. Site header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,18,32,.93);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.masthead{position:relative;}
.masthead-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:20px;
  padding-block:18px 16px;
}
.masthead-meta{
  grid-column:1;
  justify-self:start;
  margin:0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  line-height:1.5;
  color:var(--muted);
}
.status-dot{
  display:inline-block;
  width:6px;
  height:6px;
  margin-right:9px;
  border-radius:50%;
  background:var(--ok);
  box-shadow:0 0 0 3px rgba(46,230,168,.15);
  vertical-align:1px;
}
.brand{
  grid-column:2;
  justify-self:center;
  position:relative;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:5px;
  padding:2px 30px;
  color:var(--paper);
  text-decoration:none;
}
.brand::before,
.brand::after{
  content:"";
  position:absolute;
  top:4px;
  bottom:4px;
  width:1px;
  background:var(--line);
}
.brand::before{left:0;}
.brand::after{right:0;}
.brand-title{
  font-family:var(--font-display);
  font-size:clamp(24px,2.6vw,32px);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1;
  color:var(--paper);
  transition:color .2s ease;
}
.brand:hover{color:var(--paper);}
.brand:hover .brand-title{color:var(--orange-bright);}
.brand-tagline{
  font-family:var(--font-mono);
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.26em;
  color:var(--cyan);
  white-space:nowrap;
}
.masthead-actions{
  grid-column:3;
  justify-self:end;
  display:flex;
  align-items:center;
  gap:10px;
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:9px 13px;
  border:1px solid var(--line);
  background:rgba(18,28,51,.72);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:600;
  letter-spacing:.18em;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--cyan);color:var(--cyan);}
.nav-toggle-bars{display:flex;flex-direction:column;gap:3.5px;width:16px;}
.nav-toggle-bars i{display:block;height:1.5px;width:100%;background:currentColor;transition:transform .2s ease,opacity .2s ease;}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:first-child{transform:translateY(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:last-child{transform:translateY(-5px) rotate(-45deg);}

.site-nav{
  background:rgba(18,28,51,.55);
  border-top:1px solid var(--line);
  visibility:visible;
}
.nav-inner{padding-inline:var(--gutter);}
.nav-list{
  display:flex;
  justify-content:center;
  align-items:stretch;
  gap:2px;
}
.nav-item{display:flex;}
.nav-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:14px 20px;
  border-bottom:2px solid transparent;
  font-size:14.5px;
  font-weight:500;
  letter-spacing:.06em;
  color:var(--muted);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s ease,border-color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--paper);background:rgba(255,107,26,.07);}
.nav-link[aria-current="page"]{color:var(--orange);border-bottom-color:var(--orange);}
.nav-index{
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:0;
  color:rgba(124,139,161,.5);
}
.nav-link[aria-current="page"] .nav-index{color:var(--gold);}

.scroll-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  background:rgba(37,50,77,.5);
  pointer-events:none;
}
.scroll-progress span{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--orange),var(--gold) 55%,var(--cyan));
}

/* ---------- 10. Site footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,120px);
  background:var(--ink-1);
  border-top:1px solid var(--line);
  color:var(--paper);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--orange),var(--cyan),transparent);
  opacity:.6;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.1fr 1.9fr;
  gap:clamp(28px,4vw,56px);
  padding-block:clamp(44px,6vw,68px) clamp(28px,4vw,48px);
}
.footer-eyebrow{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:600;
  letter-spacing:.24em;
  color:var(--orange);
}
.footer-logo{
  display:inline-block;
  font-family:var(--font-display);
  font-size:clamp(28px,3.4vw,40px);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1;
  color:var(--paper);
  text-decoration:none;
}
.footer-logo:hover{color:var(--orange-bright);}
.footer-desc{
  margin-top:16px;
  max-width:36em;
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
}
.footer-badge{
  display:inline-block;
  margin-top:20px;
  padding:6px 12px;
  border:1px solid rgba(255,200,87,.35);
  font-size:11px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--gold);
}
.footer-cols{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(16px,2vw,26px);
}
.footer-card{
  background:rgba(11,18,32,.62);
  border:1px solid var(--line);
  padding:22px 22px 24px;
}
.footer-card-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--cyan);
}
.contact-list{display:grid;}
.contact-item{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 0;
  border-bottom:1px dashed rgba(37,50,77,.85);
}
.contact-item:last-child{border-bottom:0;}
.contact-key{
  flex:0 0 40px;
  font-size:10.5px;
  font-weight:600;
  letter-spacing:.14em;
  color:var(--muted);
}
.contact-value{
  flex:1 1 auto;
  min-width:0;
  font-size:13.5px;
  line-height:1.6;
  color:var(--paper);
  word-break:break-all;
}
.copy-btn{
  flex:0 0 auto;
  padding:5px 10px;
  border:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--muted);
  transition:color .2s ease,border-color .2s ease;
}
.copy-btn:hover{color:var(--cyan);border-color:var(--cyan);}
.copy-btn.is-copied{color:var(--ok);border-color:var(--ok);}
.copy-btn--legal{padding:4px 9px;font-size:10.5px;}
.footer-links{display:grid;gap:2px;}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:6px 0;
  font-size:14px;
  color:var(--paper);
  text-decoration:none;
}
.footer-link::before{
  content:"";
  width:14px;
  height:1px;
  background:var(--orange);
  transition:width .2s ease,background .2s ease;
}
.footer-link:hover{color:var(--orange-bright);}
.footer-link:hover::before{width:24px;background:var(--cyan);}
.footer-hint{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  line-height:1.75;
  color:rgba(124,139,161,.85);
}
.footer-legal{border-top:1px solid var(--line);}
.legal-inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 20px;
  padding-block:22px 30px;
  font-size:12.5px;
}
.legal-copy{margin:0;color:var(--muted);}
.legal-icp{color:var(--muted);letter-spacing:.06em;}
.footer-note{
  flex:1 1 100%;
  margin:4px 0 0;
  font-size:12.5px;
  line-height:1.7;
  color:rgba(124,139,161,.72);
}

/* ---------- 11. Reveal / To-top ---------- */
.js-ready [data-reveal]{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .6s ease,transform .6s ease;
}
.js-ready [data-reveal].is-revealed{opacity:1;transform:none;}

.to-top{
  position:fixed;
  right:20px;
  bottom:20px;
  z-index:70;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  background:var(--ink-1);
  border:1px solid var(--line);
  color:var(--paper);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s,border-color .2s ease,color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;}
.to-top:hover{border-color:var(--orange);color:var(--orange);}

/* ---------- 12. Responsive ---------- */
@media (max-width:1024px){
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr;gap:34px;}
}

@media (max-width:959px){
  :root{--gutter:18px;}
  .masthead-inner{
    grid-template-columns:1fr auto;
    padding-block:12px 11px;
  }
  .masthead-meta,
  .masthead-actions{display:none;}
  .brand{
    grid-column:1;
    justify-self:start;
    align-items:flex-start;
    padding:0;
  }
  .brand::before,
  .brand::after{display:none;}
  .brand-title{font-size:23px;}
  .brand-tagline{font-size:9.5px;letter-spacing:.2em;}
  .nav-toggle{grid-column:2;justify-self:end;display:inline-flex;}

  .site-nav{
    max-height:0;
    overflow:hidden;
    visibility:hidden;
    border-top-color:transparent;
    transition:max-height .3s ease,visibility .3s ease,border-color .3s ease;
  }
  .site-nav[data-open]{
    max-height:260px;
    visibility:visible;
    border-top-color:var(--line);
  }
  .nav-list{
    justify-content:flex-start;
    gap:8px;
    overflow-x:auto;
    scroll-snap-type:x proximity;
    padding-block:12px 16px;
    scrollbar-width:none;
  }
  .nav-list::-webkit-scrollbar{display:none;}
  .nav-item{flex:0 0 auto;scroll-snap-align:start;}
  .nav-link{
    border:1px solid var(--line);
    border-bottom-width:2px;
    background:rgba(11,18,32,.55);
    padding:10px 15px;
    font-size:13.5px;
    letter-spacing:.04em;
  }
  .nav-link:hover{background:rgba(255,107,26,.1);}
  .nav-link[aria-current="page"]{border-color:var(--orange);}
  .nav-index{display:none;}
}

@media (max-width:760px){
  .footer-cols{grid-template-columns:1fr;}
  .contact-item{flex-wrap:wrap;}
  .contact-value{flex:1 1 60%;}
}

@media (max-width:680px){
  .grid--2,
  .grid--3{grid-template-columns:1fr;}
  .to-top{right:14px;bottom:14px;width:40px;height:40px;}
  .rail > *{flex-basis:min(76vw,300px);}
}

/* ---------- 13. Motion preference ---------- */
@media (prefers-reduced-motion:no-preference){
  .status-dot{animation:pulse 2.6s ease-in-out infinite;}
  @keyframes pulse{
    0%,100%{opacity:1;}
    50%{opacity:.4;}
  }
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto;}
  .js-ready [data-reveal]{opacity:1;transform:none;}
  .card:hover{transform:none;}
}