/* cosmos.css —— 独立宇宙页（深空沉浸式，从明亮首页点进来） */
:root{
  --a:#EC4899;--b:#8B5CF6;--c:#38BDF8;
  --fg:#ECE8F4;--fg2:#A9A0BD;
  --planet-glow:#8b5cf6;
  --sab:env(safe-area-inset-bottom,0px);
  --sat:env(safe-area-inset-top,0px);
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body.cosmos-page{
  font-family:'Nunito','PingFang SC','Microsoft YaHei',sans-serif;
  background:#050510;color:var(--fg);
  -webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;
  overflow:hidden;height:100vh;height:100dvh;
}
#cosmos{position:fixed;inset:0;z-index:0;display:block;cursor:grab;touch-action:none}
#cosmos:active{cursor:grabbing}

.cosmos-ui{position:fixed;inset:0;z-index:1;pointer-events:none}
.cosmos-ui>*{pointer-events:auto}

.cosmos-back{
  position:absolute;top:calc(14px + var(--sat));left:16px;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px 10px 14px;border-radius:999px;text-decoration:none;
  font-size:13.5px;font-weight:800;color:#fff;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  transition:.28s var(--ease);min-height:44px;
}
.cosmos-back svg{width:16px;height:16px;stroke:currentColor;stroke-width:2.4;fill:none;stroke-linecap:round;stroke-linejoin:round}
.cosmos-back:hover{background:rgba(255,255,255,.18);transform:translateX(-3px)}

.cosmos-hint{
  position:absolute;left:50%;bottom:calc(26px + var(--sab));transform:translateX(-50%);
  display:flex;align-items:center;gap:9px;white-space:nowrap;
  padding:10px 18px;border-radius:999px;font-size:13px;font-weight:700;color:rgba(255,255,255,.75);
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  animation:hintFloat 4s ease-in-out infinite;transition:opacity .6s;
}
.cosmos-hint b{color:#fff;font-weight:800}
.cosmos-hint .ic{width:16px;height:16px;stroke:rgba(255,255,255,.75);stroke-width:2;fill:none;stroke-linecap:round}
@keyframes hintFloat{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-6px)}}
body.cosmos-focus .cosmos-hint{opacity:0}

.planet-card{
  position:absolute;right:26px;top:50%;transform:translateY(-50%) translateX(30px) scale(.94);
  width:min(330px,86vw);
  background:rgba(18,15,34,.82);border:1px solid rgba(255,255,255,.16);border-radius:24px;
  padding:26px 26px 24px;
  backdrop-filter:blur(22px) saturate(1.3);-webkit-backdrop-filter:blur(22px) saturate(1.3);
  box-shadow:0 8px 26px -10px rgba(0,0,0,.55),0 36px 90px -28px rgba(0,0,0,.75);
  opacity:0;transition:.5s var(--ease);pointer-events:none;
}
.planet-card.in{opacity:1;transform:translateY(-50%) translateX(0) scale(1);pointer-events:auto}
.planet-card .pc-name{font-family:'ZCOOL KuaiLe',sans-serif;font-size:27px;margin-bottom:10px;color:#c4b5fd}
.planet-card .pc-desc{color:rgba(255,255,255,.75);font-size:14px;line-height:1.9;letter-spacing:.02em}
.planet-card .pc-close{
  position:absolute;top:12px;right:12px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);
  cursor:pointer;padding:0;width:34px;height:34px;border-radius:11px;display:grid;place-items:center;transition:.22s}
.planet-card .pc-close:hover{background:rgba(255,255,255,.16)}
.planet-card .pc-close svg{width:15px;height:15px;stroke:rgba(255,255,255,.75);stroke-width:2.3;fill:none;stroke-linecap:round}

body.cosmos-focus::after{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(ellipse 80% 60% at 62% 42%,color-mix(in srgb,var(--planet-glow) 24%,transparent),transparent 72%);
  animation:glowPulse 5s ease-in-out infinite;
}
@keyframes glowPulse{0%,100%{opacity:.65}50%{opacity:1}}

.cosmos-fallback{position:fixed;inset:0;z-index:0;display:grid;place-items:center;
  background:radial-gradient(ellipse 80% 50% at 50% 20%,#14102b,#050510 75%)}
.cosmos-fallback .fb-stars{position:absolute;inset:0;pointer-events:none}
.cosmos-fallback .fb-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:#fff;animation:tw 3s ease-in-out infinite}
@keyframes tw{0%,100%{opacity:.15;transform:scale(.7)}50%{opacity:.95;transform:scale(1.25)}}
.cosmos-fallback .fb-info{position:relative;z-index:2;text-align:center;max-width:min(420px,86vw);
  padding:34px 30px;border-radius:24px;background:rgba(18,15,34,.72);
  border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:0 36px 90px -28px rgba(0,0,0,.8)}
.cosmos-fallback .fb-info h2{font-size:24px;margin-bottom:10px;color:#e9d5ff}
.cosmos-fallback .fb-info p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.72);margin-bottom:18px}
.cosmos-fallback .fb-retry{font:inherit;font-weight:800;font-size:14.5px;color:#fff;cursor:pointer;
  padding:13px 30px;border-radius:999px;border:none;min-height:48px;
  background:linear-gradient(135deg,#a78bfa,#60a5fa);
  box-shadow:0 12px 30px -10px rgba(139,92,246,.6);transition:.28s var(--ease)}
.cosmos-fallback .fb-retry:hover{transform:translateY(-3px)}
.cosmos-fallback .fb-retry:focus-visible{outline:3px solid rgba(167,139,250,.8);outline-offset:3px}
#cosmos:focus-visible{outline:2px solid rgba(167,139,250,.65);outline-offset:-2px}

#bangVeil{
  position:fixed;inset:0;z-index:999;background:#020208;
  display:grid;place-items:center;pointer-events:none;
  transition:opacity .8s var(--ease);
  grid-template-rows:1fr auto 1fr;
  align-content:center;
}
#bangVeil.lift{opacity:0}
/* 展开中文案（加载状态可读化） */
.bang-label{
  grid-row:2;color:#9d93c8;font-size:13px;letter-spacing:.42em;text-indent:.42em;
  margin-top:46px;opacity:.85;
}
.bang-label .dots::after{content:'…';animation:bangDots 1.4s steps(4) infinite}
@keyframes bangDots{0%{content:''}25%{content:'·'}50%{content:'· ·'}75%{content:'· · ·'}}
@media (prefers-reduced-motion: reduce){ .bang-label .dots::after{content:''} }
.bang-star{
  width:6px;height:6px;border-radius:50%;background:#fff;
  box-shadow:0 0 8px 2px rgba(255,255,255,.9),0 0 34px 10px rgba(160,190,255,.55);
  opacity:0;transform:scale(.2);
  transition:opacity .5s ease,transform .5s var(--ease);
}
#bangVeil.go .bang-star{opacity:1;transform:scale(1)}
body.cosmos-bang{overflow:hidden}

.hero-title .ch{display:inline-block;opacity:0;transform:translateY(24px) rotate(2deg);
  transition:opacity .6s var(--ease),transform .6s var(--ease)}
.hero-title .ch.on{opacity:1;transform:none}

@media (max-width:640px){
  .planet-card{right:12px;left:12px;width:auto;top:auto;bottom:calc(84px + var(--sab));transform:translateY(24px) scale(.96)}
  .planet-card.in{transform:translateY(0) scale(1)}
  .cosmos-hint{font-size:11.5px;padding:9px 14px;bottom:calc(16px + var(--sab))}
  .cosmos-back{padding:9px 14px 9px 11px;font-size:12.5px}
  .cosmos-fallback .fb-info{padding:26px 20px}
  .cosmos-fallback .fb-info h2{font-size:20px}
}
/* iPad / 平板横竖屏：UI 控件略放大，信息卡给足点击区 */
@media (min-width:768px) and (max-width:1180px) and (pointer:coarse){
  .cosmos-back{padding:11px 20px 11px 15px;font-size:15px;min-height:48px}
  .cosmos-hint{font-size:14px;padding:12px 20px}
  .planet-card{width:min(380px,80vw)}
  .planet-card .pc-close{width:40px;height:40px}
}
/* 可见焦点环（P2-1：触屏/键盘同样可见） */
.cosmos-ui a:focus-visible,.cosmos-ui button:focus-visible{
  outline:3px solid rgba(167,139,250,.85);outline-offset:2px;border-radius:14px
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.001s!important}
}
/* ================= 桌面端 ================= */
@media (min-width:1200px){
  .planet-card{width:360px;right:40px}
  .cosmos-back{top:22px;left:24px;padding:11px 22px 11px 16px;font-size:14px}
  .cosmos-hint{font-size:14px;padding:11px 22px}
}
@media (hover:hover) and (pointer:fine){
  .cosmos-back:hover{background:rgba(255,255,255,.2)}
  #cosmos{cursor:grab}
}

/* ---- v3 工具组：重置视角 ---- */
.cosmos-tools{position:absolute;top:86px;right:16px;display:flex;flex-direction:column;gap:8px;z-index:5}
.cos-tool{
  appearance:none;cursor:pointer;
  display:inline-flex;align-items:center;gap:8px;
  min-height:44px;padding:9px 16px;
  border:1px solid rgba(160,180,255,.25);border-radius:14px;
  background:rgba(12,14,32,.66);color:#dfe6ff;
  font-family:inherit;font-size:13px;font-weight:700;
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:background .2s ease,border-color .2s ease,transform .15s ease;
}
.cos-tool svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.cos-tool:hover{background:rgba(139,92,246,.3);border-color:rgba(167,139,250,.55)}
.cos-tool:active{transform:scale(.97)}
.cos-tool:focus-visible{outline:2px solid #a78bfa;outline-offset:2px}
@media (max-width:640px){ .cosmos-tools{top:78px;right:12px} }

/* ---- v6 展馆导览栏 ---- */
.cosmos-rail{
  position:absolute;left:16px;top:50%;transform:translateY(-50%);z-index:5;
  display:flex;flex-direction:column;gap:6px;
  padding:12px 10px;border-radius:18px;
  background:rgba(12,14,32,.55);border:1px solid rgba(160,180,255,.18);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.rail-item{
  appearance:none;cursor:pointer;
  display:flex;align-items:center;gap:9px;
  min-height:40px;padding:7px 13px 7px 10px;
  border:1px solid transparent;border-radius:12px;
  background:transparent;color:#c9d4f5;
  font-family:inherit;font-size:13px;font-weight:700;white-space:nowrap;
  transition:all .2s ease;
}
.rail-item i{width:9px;height:9px;border-radius:50%;flex:none}
.rail-item:hover{color:#fff;background:rgba(160,180,255,.12)}
.rail-item.on{color:#fff;background:rgba(160,180,255,.16);border-color:rgba(160,180,255,.3)}
.rail-item:focus-visible{outline:2px solid #a78bfa;outline-offset:2px}
#cosmosTour[aria-pressed="true"]{background:rgba(139,92,246,.45);border-color:rgba(167,139,250,.7)}
#cosmosTour[aria-pressed="true"] svg{fill:currentColor;stroke:none}
@media (max-width:640px){
  .cosmos-rail{
    left:12px;right:12px;top:auto;bottom:calc(76px + env(safe-area-inset-bottom,0px));transform:none;
    flex-direction:row;overflow-x:auto;padding:8px;
    scrollbar-width:none;
  }
  .cosmos-rail::-webkit-scrollbar{display:none}
  .rail-item{min-height:36px;padding:6px 11px 6px 9px;font-size:12px;flex:none}
}