/* ============================================================
   AI 未来博物馆 — 深空极光主题
   纯静态 · 零外部依赖 · 中文系统字体
   ============================================================ */

:root {
  /* base */
  --bg:        #050713;
  --bg-soft:   #0a0e22;
  --ink:       #eef2ff;
  --muted:     #a6b2da;
  --faint:     #6d78a4;
  --line:      rgba(255, 255, 255, 0.10);
  --glass:     rgba(255, 255, 255, 0.045);
  --glass-2:   rgba(255, 255, 255, 0.075);

  /* aurora accents */
  --cyan:    #3fe3ff;
  --blue:    #5b8cff;
  --violet:  #a069ff;
  --magenta: #ff5cc8;
  --teal:    #29e0c4;

  --aurora: linear-gradient(115deg, var(--cyan) 0%, var(--blue) 32%, var(--violet) 62%, var(--magenta) 100%);

  --glow-cyan:    0 0 60px rgba(63, 227, 255, 0.28);
  --glow-violet:  0 0 60px rgba(160, 105, 255, 0.30);
  --glow-magenta: 0 0 60px rgba(255, 92, 200, 0.26);

  --radius:   22px;
  --radius-s: 14px;
  --maxw:     1180px;

  --font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.7, 0.2, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

/* ---------- background layers ---------- */
#stars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(1200px 800px at 50% -10%, rgba(91, 140, 255, 0.10), transparent 60%),
    radial-gradient(900px 600px at 100% 0%, rgba(255, 92, 200, 0.08), transparent 55%),
    var(--bg);
}

.aurora {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
}
.aurora.a1 { width: 46vw; height: 46vw; left: -8vw;  top: -10vw;
  background: radial-gradient(circle at 30% 30%, var(--cyan), transparent 65%);
  animation: drift1 24s var(--ease) infinite alternate; }
.aurora.a2 { width: 52vw; height: 52vw; right: -12vw; top: -6vw;
  background: radial-gradient(circle at 60% 40%, var(--violet), transparent 65%);
  animation: drift2 30s var(--ease) infinite alternate; }
.aurora.a3 { width: 40vw; height: 40vw; left: 20vw; bottom: -20vw;
  background: radial-gradient(circle at 50% 50%, var(--magenta), transparent 65%);
  opacity: 0.4;
  animation: drift3 34s var(--ease) infinite alternate; }

@keyframes drift1 { to { transform: translate3d(8vw, 6vh, 0) scale(1.15); } }
@keyframes drift2 { to { transform: translate3d(-6vw, 8vh, 0) scale(1.1); } }
@keyframes drift3 { to { transform: translate3d(10vw, -6vh, 0) scale(1.2); } }

/* subtle top vignette so text always reads */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(120% 90% at 50% 0%, transparent 55%, rgba(5, 7, 19, 0.65) 100%);
}

/* ---------- layout ---------- */
.wrap {
  position: relative;
  z-index: 1;
  width: min(100% - 44px, var(--maxw));
  margin-inline: auto;
}

.site { position: relative; z-index: 1; }

/* ---------- nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; letter-spacing: 0.02em; }
.brand .orb {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--aurora);
  box-shadow: var(--glow-violet);
  animation: pulse 4s ease-in-out infinite;
}
.brand .name { font-size: 1.02rem; }
.brand .name small { display: block; font: 500 0.62rem/1 var(--font-mono); color: var(--faint); letter-spacing: 0.14em; margin-top: 3px; }
@keyframes pulse { 50% { box-shadow: 0 0 34px rgba(160,105,255,0.6); transform: scale(1.06); } }

.nav-right { display: flex; align-items: center; gap: 20px; }
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 15px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass);
  font: 500 0.76rem/1 var(--font-mono); letter-spacing: 0.06em; color: var(--muted);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.pill .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); }
.nav-link { color: var(--muted); font-size: 0.9rem; transition: color 0.25s; }

/* 语言切换（中文默认），状态存在 localStorage 的 aiseum_lang，与各展品共用 */
.lang {
  display: inline-flex; align-items: center; gap: 2px;
  padding: 3px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.lang button {
  padding: 6px 12px; border: 0; border-radius: 999px; background: none;
  font: 500 0.74rem/1 var(--font-mono); letter-spacing: 0.06em;
  color: var(--faint); cursor: pointer;
  transition: color 0.25s, background 0.25s;
}
.lang button:hover { color: var(--muted); }
.lang button.is-on { color: var(--ink); background: var(--glass-2); }
.nav-link:hover { color: var(--ink); }

/* ---------- hero ---------- */
.hero { padding: clamp(48px, 11vh, 130px) 0 70px; text-align: center; }
.eyebrow {
  display: inline-block;
  font: 500 0.74rem/1 var(--font-mono);
  letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 26px;
  padding-left: 0.42em;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.9rem, 8.5vw, 6.4rem);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -0.015em;
  background: var(--aurora);
  background-size: 220% 220%;
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  animation: sheen 12s ease infinite;
}
@keyframes sheen { 50% { background-position: 100% 50%; } }
.hero .sub {
  margin: 20px 0 0;
  font-size: clamp(1.05rem, 2.4vw, 1.5rem);
  color: var(--ink);
  letter-spacing: 0.14em;
  font-weight: 300;
}
.hero .lede {
  max-width: 620px; margin: 26px auto 0;
  color: var(--muted); font-size: 1.02rem;
}

/* ---------- portals ---------- */
.portals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 26px;
  margin: clamp(44px, 8vh, 84px) 0 40px;
}
.portal {
  --rx: 0deg; --ry: 0deg; --mx: 50%; --my: 50%;
  position: relative;
  display: flex; flex-direction: column;
  min-height: 320px;
  padding: 34px 32px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--glass);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  overflow: hidden;
  transform: perspective(1000px) rotateX(var(--rx)) rotateY(var(--ry));
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.45s;
  isolation: isolate;
}
.portal::before { /* pointer highlight */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(400px circle at var(--mx) var(--my), rgba(255,255,255,0.10), transparent 45%);
  opacity: 0; transition: opacity 0.35s;
}
.portal::after { /* accent wash */
  content: ""; position: absolute; inset: 0; z-index: -2; opacity: 0.14;
  transition: opacity 0.45s;
}
.portal:hover { border-color: rgba(255,255,255,0.28); }
.portal:hover::before { opacity: 1; }
.portal:hover::after { opacity: 0.28; }

.portal--cs:hover { box-shadow: var(--glow-cyan); }
.portal--cs::after { background: radial-gradient(600px circle at 20% 0%, var(--cyan), transparent 60%); }
.portal--cs .p-index, .portal--cs .p-eyebrow { color: var(--cyan); }

.portal--ai:hover { box-shadow: var(--glow-magenta); }
.portal--ai::after { background: radial-gradient(600px circle at 50% 0%, var(--magenta), transparent 60%); }
.portal--ai .p-index, .portal--ai .p-eyebrow { color: var(--magenta); }

.portal--lib:hover { box-shadow: var(--glow-violet); }
.portal--lib::after { background: radial-gradient(600px circle at 80% 0%, var(--violet), transparent 60%); }
.portal--lib .p-index, .portal--lib .p-eyebrow { color: var(--violet); }

.p-top { display: flex; align-items: flex-start; justify-content: space-between; }
.p-index { font: 600 0.8rem/1 var(--font-mono); letter-spacing: 0.2em; }
.p-icon {
  width: 54px; height: 54px; display: grid; place-items: center;
  border-radius: 14px; border: 1px solid var(--line); background: var(--glass-2);
  color: var(--ink);
}
.p-icon svg { width: 28px; height: 28px; }
.p-eyebrow { font: 500 0.72rem/1 var(--font-mono); letter-spacing: 0.32em; text-transform: uppercase; margin-top: 30px; }
.portal h2 { margin: 12px 0 8px; font-size: 2.3rem; font-weight: 700; letter-spacing: 0.02em; }
.portal p { margin: 0; color: var(--muted); max-width: 34ch; }
.p-cta {
  margin-top: auto; padding-top: 24px;
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 600; letter-spacing: 0.04em;
}
.p-cta .arrow { transition: transform 0.3s var(--ease); }
.portal:hover .p-cta .arrow { transform: translateX(6px); }

/* ---------- footer ---------- */
.footer {
  margin-top: 70px; padding: 40px 0 54px;
  border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 14px 26px;
  align-items: center; justify-content: space-between;
  color: var(--faint); font-size: 0.85rem;
}
.footer .tagline { color: var(--muted); }
.footer .mono { font-family: var(--font-mono); letter-spacing: 0.05em; }
.footer .beian { flex-basis: 100%; display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 16px; font: 500 0.8rem/1.5 var(--font-mono); letter-spacing: 0.05em; margin-top: 4px; }
.footer .beian a { color: var(--faint); transition: color 0.25s; }
.footer .beian a:hover { color: var(--muted); }
.footer .beian .gongan { display: inline-flex; align-items: center; gap: 5px; }
.footer .beian .gongan img { height: 1.15em; width: auto; display: block; }

/* ============================================================
   展馆页 (cs / ai / pro)
   ============================================================ */
.back {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 8px 0 0; color: var(--muted); font-size: 0.9rem;
  transition: color 0.25s, gap 0.25s;
}
.back:hover { color: var(--ink); gap: 12px; }

.page-head { padding: clamp(40px, 9vh, 96px) 0 8px; max-width: 760px; }
.page-head h1 {
  margin: 18px 0 0;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05; font-weight: 800; letter-spacing: -0.01em;
}
.page-head h1 .grad {
  background: var(--aurora); background-size: 200% 200%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: sheen 12s ease infinite;
}
.page-head .lede { margin: 22px 0 0; color: var(--muted); font-size: 1.08rem; max-width: 60ch; }

.status-pill {
  display: inline-flex; align-items: center; gap: 9px; margin-top: 30px;
  padding: 10px 18px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass);
  font: 500 0.82rem/1 var(--font-mono); letter-spacing: 0.08em; color: var(--muted);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.status-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); animation: pulse 2.6s ease-in-out infinite; }

/* search mock (pro) */
.searchbar {
  display: flex; align-items: center; gap: 12px;
  margin: 40px 0 6px; padding: 8px 8px 8px 22px;
  border-radius: 999px; border: 1px solid var(--line);
  background: var(--glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  max-width: 680px;
}
.searchbar svg { width: 20px; height: 20px; color: var(--faint); flex: none; }
.searchbar input {
  flex: 1; background: none; border: 0; outline: 0;
  color: var(--ink); font-family: var(--font-sans); font-size: 1rem; padding: 12px 0;
}
.searchbar input::placeholder { color: var(--faint); }
.searchbar button {
  flex: none; padding: 12px 22px; border-radius: 999px; border: 0;
  background: var(--aurora); color: #0a0a1a; font-weight: 700; letter-spacing: 0.04em;
  cursor: not-allowed; opacity: 0.9;
}
.search-note { margin: 14px 2px 0; font: 500 0.78rem/1.5 var(--font-mono); color: var(--faint); letter-spacing: 0.06em; }

/* exhibition skeleton grid (pro) */
.exhibit-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  margin: 46px 0 10px;
}
.exhibit-card {
  position: relative; overflow: hidden;
  min-height: 210px; padding: 22px;
  border-radius: var(--radius-s); border: 1px solid var(--line);
  background: var(--glass);
  display: flex; flex-direction: column; gap: 14px;
}
.exhibit-card .tag {
  align-self: flex-start;
  font: 500 0.66rem/1 var(--font-mono); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--violet); padding: 6px 10px; border-radius: 999px;
  border: 1px solid rgba(160,105,255,0.35); background: rgba(160,105,255,0.08);
}
.skeleton { border-radius: 8px; background: linear-gradient(90deg, rgba(255,255,255,0.05) 25%, rgba(255,255,255,0.12) 37%, rgba(255,255,255,0.05) 63%); background-size: 400% 100%; animation: shimmer 1.8s linear infinite; }
.skeleton.line { height: 12px; }
.skeleton.line.short { width: 55%; }
.skeleton.line.mid { width: 78%; }
.skeleton.block { flex: 1; min-height: 60px; }
@keyframes shimmer { to { background-position: -200% 0; } }

/* 展品卡：横版，一行一个。整卡可点（上线的展品用 <a>，筹备中的用 <div>） */
.toy-grid {
  display: grid; grid-template-columns: 1fr; gap: 18px;
  margin: 48px 0 10px;
}
.toy-card {
  position: relative; overflow: hidden;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 28px;
  padding: 26px 30px; border-radius: var(--radius-s);
  border: 1px solid var(--line); background: var(--glass);
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.45s;
}
/* 只有能点的卡才有悬停反馈——筹备中的卡不该看起来可点 */
.toy-card--live:hover { transform: translateY(-3px); border-color: rgba(255,255,255,0.28); box-shadow: var(--glow-cyan); }
.toy-card .t-icon {
  width: 54px; height: 54px; display: grid; place-items: center;
  border-radius: 14px; border: 1px solid var(--line); background: var(--glass-2); color: var(--cyan);
}
.toy-card .t-icon svg { width: 28px; height: 28px; }
.toy-card h3 { margin: 0 0 6px; font-size: 1.18rem; font-weight: 650; }
.toy-card p { margin: 0; color: var(--muted); font-size: 0.92rem; max-width: 62ch; }
.toy-card p strong { color: var(--ink); font-weight: 600; }
.soon { font: 500 0.7rem/1 var(--font-mono); letter-spacing: 0.14em; color: var(--faint); text-transform: uppercase; white-space: nowrap; }

/* 展品卡跟随所在馆的主色：CS 馆沿用默认的青，AI 馆用品红 */
.wing--ai .toy-card--live:hover { box-shadow: var(--glow-magenta); }
.wing--ai .toy-card .t-icon { color: var(--magenta); }
.wing--ai .eyebrow { color: var(--magenta); }

/* 展品内含的任务 */
.t-tasks {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin: 14px 0 0; padding: 0; list-style: none;
}
.t-tasks li {
  padding: 6px 13px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--glass-2);
  font-size: 0.82rem; color: var(--muted);
}

/* 上线展品右侧的行动点，取代 .soon */
.t-cta {
  display: inline-flex; align-items: center; gap: 8px; white-space: nowrap;
  font-size: 0.95rem; font-weight: 600; letter-spacing: 0.04em; color: var(--ink);
}
.t-cta .arrow { transition: transform 0.3s var(--ease); }
.toy-card--live:hover .t-cta .arrow { transform: translateX(5px); }

.section-label {
  margin: 60px 0 0; font: 500 0.74rem/1 var(--font-mono);
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--faint);
}

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity 0.85s var(--ease), transform 0.85s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .portals { grid-template-columns: 1fr; }
  .exhibit-grid { grid-template-columns: 1fr; }
  .toy-card { grid-template-columns: auto 1fr; gap: 18px; padding: 22px 20px; }
  .toy-card .t-cta, .toy-card .soon { grid-column: 2; margin-top: 14px; }
  /* 馆名 eyebrow 比原来的「入门 · Beginner」长，窄屏收一点字距避免折行 */
  .eyebrow { letter-spacing: 0.16em; font-size: 0.68rem; }
  .nav .pill { display: none; }
  .portal { min-height: 260px; }
  .footer { flex-direction: column; align-items: flex-start; }
}

/* ---------- motion off ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}