:root {
  --bg: #060912;
  --bg-2: #0b1020;
  --card: rgba(255, 255, 255, .035);
  --card-hi: rgba(255, 255, 255, .07);
  --line: rgba(255, 255, 255, .09);
  --text: #eef2fb;
  --muted: #8f9bb3;
  --blue: #3b82f6;
  --cyan: #22d3ee;
  --violet: #8b5cf6;
  --pink: #f43f5e;
  --grad: linear-gradient(100deg, #60a5fa 0%, #a78bfa 45%, #f472b6 100%);
  --ease: cubic-bezier(.2, .8, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0; min-height: 100vh; overflow-x: hidden;
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  line-height: 1.65; -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
::selection { background: rgba(139, 92, 246, .45); }

/* 中英切换 */
html[data-lang="en"] .zh, html:not([data-lang="en"]) .en { display: none !important; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---------- 背景 ---------- */
.aurora { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }
.aurora span {
  position: absolute; border-radius: 50%; filter: blur(110px); opacity: .5;
  animation: drift 22s ease-in-out infinite alternate;
}
.aurora span:nth-child(1) { width: 620px; height: 620px; background: #1d4ed8; top: -200px; right: -120px; }
.aurora span:nth-child(2) { width: 520px; height: 520px; background: #7c3aed; top: 30%; left: -220px; animation-duration: 28s; opacity: .35; }
.aurora span:nth-child(3) { width: 460px; height: 460px; background: #be185d; bottom: -220px; right: 20%; animation-duration: 32s; opacity: .25; }
@keyframes drift { to { transform: translate(80px, 60px) scale(1.15); } }
.grain {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 20%, transparent 75%);
}

/* ---------- 导航 ---------- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 50; transition: background .3s, border-color .3s; border-bottom: 1px solid transparent; }
.nav.scrolled {
  background: rgba(6, 9, 18, .72); border-bottom-color: var(--line);
  backdrop-filter: saturate(180%) blur(18px); -webkit-backdrop-filter: saturate(180%) blur(18px);
}
.nav-inner { height: 68px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; font-size: 17px; letter-spacing: .02em; white-space: nowrap; }
.logo {
  display: grid; grid-template-columns: repeat(3, 7px); gap: 2px; padding: 5px; border-radius: 9px;
  background: var(--grad); box-shadow: 0 0 24px rgba(139, 92, 246, .45);
}
.logo i { width: 7px; height: 7px; border-radius: 2px; background: rgba(255,255,255,.35); }
.logo i:nth-child(1), .logo i:nth-child(5), .logo i:nth-child(9) { background: #fff; }
.links { display: flex; align-items: center; gap: 28px; font-size: 15px; }
.links a { color: var(--muted); transition: color .2s; }
.links a:hover { color: var(--text); }
.lang {
  font: inherit; font-size: 13px; cursor: pointer; color: var(--text);
  background: var(--card-hi); border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px;
  transition: background .2s;
}
.lang:hover { background: rgba(255,255,255,.14); }

/* ---------- 首屏 ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 120px 0 80px; }
.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; width: 100%; }
.pill {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 28px;
  padding: 7px 16px 7px 12px; border-radius: 999px; font-size: 13px; color: #c7d2fe;
  background: rgba(99, 102, 241, .12); border: 1px solid rgba(129, 140, 248, .3);
}
.pill i { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 0 rgba(52,211,153,.6); animation: ping 2s infinite; }
@keyframes ping { 70% { box-shadow: 0 0 0 8px rgba(52,211,153,0); } 100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); } }
h1 { margin: 0 0 26px; font-size: clamp(44px, 7.2vw, 88px); line-height: 1.04; letter-spacing: -.035em; font-weight: 800; }
em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { max-width: 520px; margin: 0 0 40px; font-size: 18px; color: var(--muted); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.btn {
  display: inline-flex; align-items: center; gap: 10px; height: 52px; padding: 0 28px;
  border-radius: 999px; font-weight: 600; font-size: 16px; transition: transform .25s var(--ease), box-shadow .25s, background .25s;
}
.btn svg { width: 18px; height: 18px; transition: transform .25s var(--ease); }
.btn:hover { transform: translateY(-2px); }
.btn:hover svg { transform: translateX(4px); }
.btn.primary { background: #fff; color: #0b1020; box-shadow: 0 10px 40px rgba(139, 92, 246, .35); }
.btn.ghost { border: 1px solid var(--line); background: var(--card); }
.btn.ghost:hover { background: var(--card-hi); }

/* 数独动画棋盘 */
.board-stage { position: relative; perspective: 1400px; display: flex; justify-content: center; }
.board {
  --size: min(470px, 82vw);
  width: var(--size); height: var(--size);
  display: grid; grid-template-columns: repeat(9, 1fr); grid-template-rows: repeat(9, 1fr);
  padding: 10px; border-radius: 26px;
  background: linear-gradient(160deg, rgba(255,255,255,.09), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.14);
  box-shadow: 0 40px 120px rgba(59, 130, 246, .25), inset 0 1px 0 rgba(255,255,255,.15);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  transform: rotateX(var(--rx, 12deg)) rotateY(var(--ry, -16deg));
  transform-style: preserve-3d; transition: transform .6s var(--ease);
}
.cell {
  display: flex; align-items: center; justify-content: center;
  font-size: calc(var(--size) / 17); font-weight: 600; color: #e2e8f0;
  border-right: 1px solid rgba(255,255,255,.07); border-bottom: 1px solid rgba(255,255,255,.07);
  transition: background .5s, color .5s;
}
.cell:nth-child(9n) { border-right: 0; }
.cell:nth-child(n+73) { border-bottom: 0; }
.cell:nth-child(9n+3), .cell:nth-child(9n+6) { border-right: 1.5px solid rgba(255,255,255,.28); }
.cell:nth-child(n+19):nth-child(-n+27), .cell:nth-child(n+46):nth-child(-n+54) { border-bottom: 1.5px solid rgba(255,255,255,.28); }
.cell.given { color: #f8fafc; }
.cell.filled { color: #93c5fd; animation: pop .45s var(--ease); }
.cell.hot { background: rgba(96, 165, 250, .22); color: #fff; text-shadow: 0 0 14px #60a5fa; }
.cell.peer { background: rgba(96, 165, 250, .06); }
.board.done .cell { animation: wave 1.2s var(--ease) both; animation-delay: calc(var(--d) * 18ms); }
@keyframes pop { from { transform: scale(.3); opacity: 0; } }
@keyframes wave { 40% { color: #fff; background: rgba(167, 139, 250, .3); text-shadow: 0 0 16px #a78bfa; } }

.float-chip {
  position: absolute; display: flex; align-items: center; gap: 8px; padding: 10px 16px; border-radius: 14px;
  font-size: 14px; white-space: nowrap;
  background: rgba(15, 20, 38, .7); border: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px rgba(0,0,0,.4); animation: bob 6s ease-in-out infinite;
}
.float-chip b { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.c1 { top: 4%; left: -2%; }
.c2 { top: 44%; right: -4%; animation-delay: -2s; }
.c3 { bottom: 2%; left: 8%; animation-delay: -4s; }
@keyframes bob { 50% { transform: translateY(-12px); } }

.scroll-hint { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); width: 26px; height: 42px; border: 1.5px solid var(--line); border-radius: 14px; }
.scroll-hint span { position: absolute; top: 8px; left: 50%; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--muted); animation: wheel 1.8s infinite; }
@keyframes wheel { to { transform: translateY(14px); opacity: 0; } }

/* 字带 */
.marquee { overflow: hidden; border-block: 1px solid var(--line); padding: 22px 0; background: rgba(255,255,255,.015); }
.track { display: flex; gap: 36px; width: max-content; animation: slide 36s linear infinite; font-size: 15px; letter-spacing: .3em; color: var(--muted); font-weight: 600; }
.track b { color: #a78bfa; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- 通用区块 ---------- */
.section { padding: 140px 0; position: relative; }
.sec-head { margin-bottom: 64px; }
.kicker { margin: 0 0 14px; font-size: 13px; letter-spacing: .2em; text-transform: uppercase; color: #a78bfa; font-weight: 600; }
h2 { margin: 0; font-size: clamp(34px, 5vw, 56px); line-height: 1.1; letter-spacing: -.03em; font-weight: 800; }

/* ---------- 产品 ---------- */
.product {
  position: relative; display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; align-items: center;
  padding: 64px; border-radius: 36px;
  background: linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.015));
  border: 1px solid var(--line); overflow: hidden;
}
.product::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(500px 300px at var(--mx, 70%) var(--my, 30%), rgba(96, 165, 250, .12), transparent 70%);
}
.app-head { display: flex; align-items: center; gap: 20px; margin-bottom: 24px; }
.app-icon { width: 84px; height: 84px; border-radius: 22px; box-shadow: 0 12px 30px rgba(37, 99, 235, .45); }
.app-head h3 { margin: 0; font-size: 30px; letter-spacing: -.02em; }
.app-head p { margin: 2px 0 0; color: var(--muted); font-size: 15px; }
.stars { color: #fbbf24; letter-spacing: 2px; margin-left: 8px; font-size: 13px; }
.product-desc { color: var(--muted); font-size: 17px; margin: 0 0 36px; max-width: 560px; }

.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 40px; }
.feat {
  position: relative; display: flex; flex-direction: column; gap: 2px; padding: 18px;
  border-radius: 18px; background: var(--card); border: 1px solid var(--line);
  font-size: 13px; color: var(--muted); line-height: 1.45;
  transition: transform .3s var(--ease), background .3s, border-color .3s;
}
.feat:hover { transform: translateY(-4px); background: var(--card-hi); border-color: rgba(167, 139, 250, .4); }
.feat svg { width: 26px; height: 26px; color: #93c5fd; margin-bottom: 10px; }
.feat b { color: var(--text); font-size: 15px; }

.downloads { display: flex; flex-wrap: wrap; gap: 12px; }
.store {
  display: inline-flex; align-items: center; gap: 10px; height: 56px; padding: 0 22px 0 16px;
  border-radius: 14px; background: #fff; color: #000; font-size: 20px; font-weight: 600; line-height: 1.05;
  transition: transform .25s var(--ease), box-shadow .25s;
}
.store:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(255,255,255,.15); }
.store svg { width: 28px; height: 28px; }
.store small { display: block; font-size: 11px; font-weight: 500; }

/* 手机样机 */
.phone-stage { position: relative; display: flex; flex-direction: column; align-items: center; gap: 22px; }
.glow-ring {
  position: absolute; top: 50%; left: 50%; width: 360px; height: 360px; margin: -200px 0 0 -180px; border-radius: 50%;
  background: conic-gradient(from 0deg, #3b82f6, #8b5cf6, #ec4899, #22d3ee, #3b82f6);
  filter: blur(70px); opacity: .45; animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.phone {
  position: relative; width: 290px; aspect-ratio: 1284 / 2778; padding: 11px; border-radius: 48px;
  background: linear-gradient(145deg, #3a4256, #12161f 40%, #2a3040);
  box-shadow: 0 0 0 1.5px rgba(255,255,255,.12), 0 50px 100px rgba(0,0,0,.6);
  transform: rotate(-4deg); transition: transform .6s var(--ease);
}
.phone:hover { transform: rotate(0deg) scale(1.02); }
.island { position: absolute; top: 22px; left: 50%; width: 88px; height: 26px; margin-left: -44px; border-radius: 20px; background: #000; z-index: 2; }
.screen { position: relative; width: 100%; height: 100%; border-radius: 38px; overflow: hidden; background: #000; }
.screen img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transform: scale(1.04); transition: opacity .8s, transform 1.2s var(--ease); }
.screen img.on { opacity: 1; transform: none; }
.dots { display: flex; gap: 8px; position: relative; }
.dots button { width: 8px; height: 8px; padding: 0; border: 0; border-radius: 8px; background: rgba(255,255,255,.25); cursor: pointer; transition: width .3s, background .3s; }
.dots button.on { width: 26px; background: #fff; }

/* 即将上线 */
.soon-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 24px; }
.soon {
  position: relative; overflow: hidden; display: flex; flex-direction: column; gap: 4px; padding: 30px;
  border-radius: 26px; border: 1px dashed rgba(255,255,255,.14); color: var(--muted); font-size: 14px;
}
.soon b { color: var(--text); font-size: 18px; }
.soon::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.06) 50%, transparent 70%);
  transform: translateX(-100%); animation: shimmer 3.5s infinite;
}
.soon:nth-child(2)::after { animation-delay: .6s; }
.soon:nth-child(3)::after { animation-delay: 1.2s; }
@keyframes shimmer { 60%, 100% { transform: translateX(100%); } }
.soon-icon {
  width: 56px; height: 56px; margin-bottom: 16px; border-radius: 16px; display: grid; place-items: center;
  font-size: 24px; font-weight: 700; color: #a78bfa; background: rgba(139, 92, 246, .1); border: 1px solid rgba(139, 92, 246, .25);
}

/* ---------- 关于 ---------- */
.statement { font-size: clamp(30px, 4.6vw, 54px); max-width: 980px; }
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 20px; }
.value { padding: 36px; border-radius: 26px; background: var(--card); border: 1px solid var(--line); transition: background .3s, transform .3s var(--ease); }
.value:hover { background: var(--card-hi); transform: translateY(-4px); }
.num { font-size: 13px; font-weight: 700; letter-spacing: .1em; color: #a78bfa; }
.value h4 { margin: 18px 0 8px; font-size: 26px; letter-spacing: -.02em; }
.value p { margin: 0; color: var(--muted); }
.company { display: grid; grid-template-columns: 1.4fr 1fr 1fr; border-radius: 26px; border: 1px solid var(--line); background: var(--card); }
.company > div { display: flex; flex-direction: column; gap: 2px; padding: 28px 32px; border-right: 1px solid var(--line); }
.company > div:last-child { border-right: 0; }
.lbl { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 6px; }
.company b { font-size: 18px; }
.company small { color: var(--muted); font-size: 13px; }

/* ---------- 联系 ---------- */
.cta {
  position: relative; overflow: hidden; text-align: center; padding: 96px 32px; border-radius: 40px;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(59, 130, 246, .35), transparent 70%),
    radial-gradient(600px 300px at 80% 100%, rgba(236, 72, 153, .3), transparent 70%),
    #0d1226;
  border: 1px solid rgba(255,255,255,.12);
}
.cta h2 { margin-bottom: 16px; }
.cta p { color: #b6c0d6; font-size: 17px; margin: 0 0 36px; }
.mail {
  display: inline-flex; align-items: center; gap: 12px; padding: 16px 30px; border-radius: 999px;
  background: #fff; color: #0b1020; font-weight: 700; font-size: clamp(16px, 2.4vw, 22px);
  box-shadow: 0 16px 50px rgba(139, 92, 246, .4); transition: transform .25s var(--ease);
}
.mail svg { width: 20px; height: 20px; transition: transform .25s var(--ease); }
.mail:hover { transform: translateY(-3px); }
.mail:hover svg { transform: translate(3px, -3px); }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: 14px; }
.foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; }
.foot-brand { display: flex; align-items: center; gap: 14px; }
.foot-brand b { display: block; color: var(--text); font-size: 15px; }
.foot-links { display: flex; gap: 24px; flex-wrap: wrap; }
.foot-links a:hover { color: var(--text); }

/* ---------- 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); transition-delay: var(--delay, 0s); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 64px; text-align: center; }
  .lead { margin-inline: auto; }
  .hero-cta { justify-content: center; }
  .product { grid-template-columns: 1fr; padding: 36px 24px; gap: 48px; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .soon-grid, .values { grid-template-columns: 1fr; }
  .company { grid-template-columns: 1fr; }
  .company > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .company > div:last-child { border-bottom: 0; }
  .section { padding: 96px 0; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .links { gap: 16px; font-size: 14px; }
  .links a:nth-child(2), .links a:nth-child(3) { display: none; }
  .hero { padding-top: 100px; }
  .float-chip { font-size: 12px; padding: 8px 12px; }
  .c2 { right: 0; }
  .phone { width: 240px; }
  .cta { padding: 64px 20px; border-radius: 28px; }
  .scroll-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}