/* ==========================================================================
   银河系 · 观测窗
   Deep-space observatory window — zero external requests by design.
   ========================================================================== */

:root{
  --bg-0:#03040c;
  --ink:#e9edff;
  --ink-dim:#a4aecf;
  --ink-mute:#6b7699;
  --gold:#ffcf8a;
  --cy:#7fe9ff;
  --vio:#b494ff;
  --line:rgba(150,170,255,.16);
  --line-soft:rgba(150,170,255,.075);
  --glass:rgba(7,10,24,.62);
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  min-height:100vh;
  min-height:100dvh;
  background:var(--bg-0);
  color:var(--ink);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.6;
  overflow:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.mono{font-family:var(--mono)}

/* ==========================================================================
   1. 天幕（背景层）
   ========================================================================== */

.sky{
  position:fixed;inset:0;z-index:0;overflow:hidden;
  background:
    radial-gradient(120% 82% at 50% 74%, #121c40 0%, #0a0e24 34%, #050714 64%, #02030a 100%);
}

#galaxy{
  position:absolute;inset:0;
  width:100%;height:100%;
  display:block;
}

/* 远处的发射星云 —— 大色团 + 模糊 */
.nebula{
  position:absolute;inset:-8%;pointer-events:none;
  mix-blend-mode:screen;opacity:.44;
  filter:blur(58px) saturate(1.15);
  background:
    radial-gradient(34% 24% at 20% 68%, rgba(122,84,255,.30), transparent 70%),
    radial-gradient(27% 19% at 78% 44%, rgba(255,110,182,.20), transparent 72%),
    radial-gradient(30% 27% at 58% 84%, rgba(64,190,255,.19), transparent 70%),
    radial-gradient(21% 16% at 41% 41%, rgba(255,186,124,.13), transparent 74%),
    radial-gradient(18% 14% at 88% 76%, rgba(120,255,220,.10), transparent 76%);
  animation:nebulaDrift 64s ease-in-out infinite alternate;
  will-change:transform;
}
@keyframes nebulaDrift{
  from{transform:translate3d(-1.4%,1%,0) scale(1.03)}
  to{transform:translate3d(1.6%,-1.2%,0) scale(1.09)}
}

/* 银盘整体弥散的乳白薄雾 */
.haze{
  position:absolute;inset:0;pointer-events:none;
  mix-blend-mode:screen;opacity:.34;
  background:radial-gradient(64% 16% at 50% 63%, rgba(255,214,168,.10), transparent 72%);
}

/* 暗角 */
.vig{
  position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(128% 96% at 50% 58%, transparent 30%, rgba(3,4,12,.5) 74%, rgba(2,3,9,.92) 100%);
}

/* 胶片颗粒 */
.grain{
  position:absolute;inset:0;pointer-events:none;
  opacity:.05;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ==========================================================================
   2. 页面骨架
   ========================================================================== */

.app{
  position:relative;z-index:2;
  display:flex;flex-direction:column;
  min-height:100vh;
  min-height:100dvh;
}

/* ---------- 顶栏 ---------- */

.hd{
  flex:none;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px clamp(18px,4vw,46px) 8px;
}

.hd__id{display:flex;align-items:center;gap:12px;min-width:0}

.hd__mark{
  width:30px;height:30px;flex:none;
  color:var(--cy);
  filter:drop-shadow(0 0 10px rgba(127,233,255,.5));
  animation:markSpin 52s linear infinite;
}
@keyframes markSpin{to{transform:rotate(360deg)}}

.hd__name{
  display:flex;flex-direction:column;
  font-size:15px;letter-spacing:.18em;line-height:1.25;
  white-space:nowrap;
}
.hd__name em{
  font-family:var(--mono);font-style:normal;
  font-size:8.5px;letter-spacing:.3em;
  color:var(--ink-mute);
}

.hd__meta{
  display:flex;align-items:center;gap:16px;
  font-size:11px;color:var(--ink-mute);
}
.hd__meta .mono{letter-spacing:.08em}

.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 12px;border:1px solid var(--line);border-radius:999px;
  background:rgba(10,14,32,.5);
  letter-spacing:.16em;font-size:10.5px;color:var(--ink-dim);
}
.pill i{
  width:6px;height:6px;border-radius:50%;
  background:var(--cy);
  box-shadow:0 0 9px var(--cy);
  animation:blip 2.6s ease-in-out infinite;
}
@keyframes blip{0%,100%{opacity:1}50%{opacity:.28}}

/* ---------- 主体 ---------- */

.stage{
  flex:1;
  display:flex;align-items:center;justify-content:center;
  padding:0 clamp(18px,4vw,46px) 22vh;
  min-height:0;
}

.hero{
  position:relative;
  max-width:760px;
  text-align:center;
}
.hero::before{
  content:'';position:absolute;left:-14%;right:-14%;top:-42%;bottom:-42%;
  z-index:0;pointer-events:none;
  background:radial-gradient(58% 54% at 50% 50%, rgba(3,5,14,.78), rgba(3,5,14,.42) 52%, transparent 76%);
}
.hero > *{position:relative;z-index:1}

.hero__tag{
  margin:0 0 20px;
  font-family:var(--mono);font-size:10.5px;
  letter-spacing:.4em;text-transform:uppercase;
  color:var(--ink-mute);
}

.hero__title{
  margin:0;
  font-size:clamp(3.6rem,12.5vw,9.5rem);
  font-weight:250;
  line-height:.96;
  letter-spacing:.08em;
  text-indent:.08em;
  background:linear-gradient(178deg,#ffffff 0%,#e2e9ff 40%,#a9b8f0 74%,#7d8fd4 100%);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
  filter:drop-shadow(0 0 42px rgba(150,180,255,.3));
}

.hero__sub{
  margin:18px 0 0;
  font-family:var(--mono);font-size:11px;
  letter-spacing:.28em;color:var(--ink-dim);
}

.hero__desc{
  margin:22px auto 0;max-width:44ch;
  font-size:14px;line-height:2;color:var(--ink-dim);
  text-wrap:pretty;
}

/* ---------- 底栏 ---------- */

.ft{flex:none}

.facts{
  display:grid;grid-template-columns:repeat(4,1fr);
  margin:0;padding:0;list-style:none;
  gap:1px;
  background:var(--line-soft);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.facts li{
  display:flex;flex-direction:column;gap:5px;
  padding:15px clamp(14px,2.4vw,28px);
  background:var(--glass);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.facts b{
  font-family:var(--mono);font-weight:400;
  font-size:9.5px;letter-spacing:.26em;text-transform:uppercase;
  color:var(--ink-mute);
}
.facts span{
  font-size:14px;letter-spacing:.04em;color:var(--ink);
}

.ft__bar{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px clamp(18px,4vw,46px);
  font-family:var(--mono);font-size:10px;
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-mute);
}
.ft__bar b{font-weight:400;color:var(--cy)}

/* ==========================================================================
   3. 响应式
   ========================================================================== */

@media (max-width:1080px){
  .stage{padding-bottom:20vh}
  .facts{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:760px){
  body{overflow-x:hidden;overflow-y:auto}
  .hd{padding:16px 18px 6px}
  .hd__meta .mono{display:none}
  .stage{padding:5vh 18px 12vh}
  .hero__desc{font-size:13.5px;line-height:1.9;margin-top:18px}
  .facts{grid-template-columns:repeat(2,1fr)}
  .facts li{padding:11px 16px}
  .facts span{font-size:13px}
  .ft__bar{flex-wrap:wrap;justify-content:flex-start;gap:8px 18px;padding:12px 18px 18px}
  /* 窄屏银盘会压到文案，底衬加深 */
  .hero::before{
    background:radial-gradient(58% 60% at 50% 50%, rgba(3,5,14,.90), rgba(3,5,14,.55) 54%, transparent 78%);
  }
}

/* 超窄屏：英文副标过长会把右侧状态胶囊挤出画面 */
@media (max-width:560px){
  .hd__name em{display:none}
  .hd__name{font-size:14px;letter-spacing:.14em}
  .pill{padding:4px 10px;font-size:10px;letter-spacing:.12em}
  .hero__title{letter-spacing:.05em;text-indent:.05em}
}

/* 矮屏：把主体往上推、压缩留白 */
@media (max-height:820px) and (min-width:761px){
  .stage{padding-bottom:11vh}
  .hero__title{font-size:clamp(3rem,9.5vw,6.4rem)}
  .hero__desc{margin-top:16px;line-height:1.85}
  .hero__tag{margin-bottom:14px}
  .facts li{padding:11px clamp(14px,2.4vw,28px)}
  /* 矮屏下银盘会压到文字，底衬加深保证可读 */
  .hero::before{
    background:radial-gradient(56% 58% at 50% 50%, rgba(3,5,14,.90), rgba(3,5,14,.56) 54%, transparent 78%);
  }
}

@media (max-height:780px) and (min-width:761px){
  .hero__desc{display:none}
  .hero__sub{margin-top:12px}
}

/* ==========================================================================
   4. 动效降级
   ========================================================================== */

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
}