:root {
  --bg: #070a11;
  --bg2: #090d16;
  --panel: #0b101a;
  --panel2: #0d1420;
  --line: #1b2434;
  --line2: #263247;
  --text: #e8edf6;
  --muted: #93a1b5;
  --dim: #64748b;
  --indigo: #6366f1;
  --indigo2: #818cf8;
  --purple: #a855f7;
  --cyan: #22d3ee;
  --green: #34d399;
  --amber: #fbbf24;
  --radius: 18px;
  --max: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
img, video { display: block; max-width: 100%; }
svg { width: 1em; height: 1em; fill: none; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.container { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.grad {
  background: linear-gradient(100deg, #c7d2fe 0%, #a5b4fc 38%, #67e8f9 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.kicker {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--indigo2);
  font-weight: 600;
  text-transform: uppercase;
}

/* ---------- nav ---------- */
.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 68px;
  display: flex;
  align-items: center;
  background: rgba(7, 10, 17, .55);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: background .25s, border-color .25s;
}
.site-nav.scrolled { background: rgba(7, 10, 17, .88); border-bottom-color: var(--line); }
.nav-inner { display: flex; align-items: center; gap: 26px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(145deg, #7c3aed, #4f46e5 58%, #0ea5e9);
  font-size: 16px; font-weight: 800; box-shadow: 0 8px 22px rgba(79, 70, 229, .35);
}
.brand-name { font-size: 17px; font-weight: 800; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 24px; margin-left: 14px; }
.nav-links a { font-size: 13px; color: var(--muted); transition: color .18s; }
.nav-links a:hover { color: #fff; }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); }
.nav-toggle svg { width: 19px; height: 19px; }

/* ---------- buttons ---------- */
.btn {
  height: 44px; padding: 0 20px; border-radius: 11px; display: inline-flex; align-items: center;
  justify-content: center; gap: 8px; font-size: 13.5px; font-weight: 700; white-space: nowrap;
  transition: transform .18s, background .18s, border-color .18s;
}
.btn svg { width: 16px; height: 16px; }
.btn:hover { transform: translateY(-1px); }
.btn-sm { height: 38px; padding: 0 15px; font-size: 12.5px; }
.btn-primary {
  background: linear-gradient(135deg, #6366f1, #7c3aed 55%, #4f46e5);
  color: #fff; box-shadow: 0 12px 30px -14px rgba(99, 102, 241, .9);
}
.btn-primary:hover { background: linear-gradient(135deg, #818cf8, #7c3aed 55%, #6366f1); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, .18); color: var(--text);
  background: rgba(255, 255, 255, .04);
}
.btn-ghost:hover { border-color: rgba(255, 255, 255, .34); background: rgba(255, 255, 255, .08); }
.btn-disabled { background: #151b28; color: #64748b; cursor: not-allowed; }
.text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--indigo2); font-size: 13px; font-weight: 600; }
.text-link svg { width: 15px; height: 15px; }
.text-link:hover { color: #c7d2fe; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 700px; display: flex; align-items: center;
  padding: 120px 0 54px; overflow: hidden; isolation: isolate;
}
.hero-video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -3; }
.hero-shade {
  position: absolute; inset: 0; z-index: -2;
  background:
    linear-gradient(90deg, rgba(7,10,17,.98) 0%, rgba(7,10,17,.93) 30%, rgba(7,10,17,.62) 58%, rgba(7,10,17,.30) 100%),
    linear-gradient(0deg, #070a11 0%, rgba(7,10,17,.10) 42%, rgba(7,10,17,.45) 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(80% 70% at 35% 10%, #000 10%, transparent 80%);
}
.hero-inner { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; height: 28px; padding: 0 12px;
  border: 1px solid rgba(34, 211, 238, .28); border-radius: 999px;
  background: rgba(34, 211, 238, .08); color: #8be9f7; font-size: 11.5px;
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.hero h1 {
  margin: 20px 0 16px; font-size: clamp(38px, 5.4vw, 70px); line-height: 1.06;
  letter-spacing: -1.5px; font-weight: 800;
}
.hero h1 em { font-style: normal; }
.hero-lead { max-width: 610px; color: #b7c3d5; font-size: 16px; line-height: 1.9; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 28px 0 22px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 10px 20px; color: #8795aa; font-size: 11.5px; }
.hero-proof span { display: inline-flex; align-items: center; gap: 6px; }
.hero-proof svg { width: 14px; height: 14px; color: #6ee7b7; }

.hero-card {
  justify-self: end; width: min(360px, 100%); border: 1px solid rgba(255,255,255,.13);
  border-radius: 22px; background: rgba(9, 14, 24, .62); backdrop-filter: blur(18px);
  box-shadow: 0 32px 80px -30px rgba(0,0,0,.9); overflow: hidden;
}
.hero-card-media { position: relative; display: block; width: 100%; aspect-ratio: 16 / 10; overflow: hidden; }
.hero-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.hero-card:hover .hero-card-media img { transform: scale(1.03); }
.hero-card-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,10,17,.65), transparent 55%); }
.play-badge {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 48px; height: 48px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.4);
  backdrop-filter: blur(8px); color: #fff; z-index: 2;
}
.play-badge svg { width: 19px; height: 19px; margin-left: 2px; }
.hero-card-tag {
  position: absolute; left: 12px; top: 12px; z-index: 2; padding: 3px 8px; border-radius: 6px;
  background: rgba(7,10,17,.7); border: 1px solid rgba(255,255,255,.16);
  color: #dbe4f2; font-size: 10px;
}
.hero-card-body { padding: 15px 16px 16px; }
.hero-card-title { font-size: 14px; font-weight: 700; }
.hero-card-meta { margin-top: 4px; font-size: 10.5px; color: #8795aa; }
.hero-card-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 14px; padding-top: 13px; border-top: 1px solid rgba(255,255,255,.09); }
.hero-card-stats b { display: block; font-size: 16px; color: #dbe5ff; }
.hero-card-stats span { display: block; font-size: 9.5px; color: #718198; margin-top: 2px; }

/* ---------- sections ---------- */
.section { padding: 96px 0; position: relative; }
.section-alt {
  background:
    radial-gradient(900px 460px at 16% 0%, rgba(99,102,241,.09), transparent 62%),
    radial-gradient(700px 420px at 96% 20%, rgba(34,211,238,.05), transparent 60%),
    var(--bg2);
  border-top: 1px solid rgba(27,36,52,.7);
  border-bottom: 1px solid rgba(27,36,52,.7);
}
.section-head { display: grid; grid-template-columns: 1fr 420px; gap: 40px; align-items: end; margin-bottom: 42px; }
.section-head h2, .studio-copy h2, .mobile-copy h2, .faq-head h2, .contact-card h2 {
  font-size: clamp(28px, 3.6vw, 44px); line-height: 1.18; letter-spacing: -.8px; margin-top: 10px;
}
.section-head p { color: var(--muted); font-size: 14px; line-height: 1.9; }
.section-note { margin-top: 18px; color: var(--dim); font-size: 11.5px; }

/* ---------- scenario cards ---------- */
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.scenario-card {
  text-align: left; border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: var(--panel); transition: transform .2s, border-color .2s; padding: 0;
}
.scenario-card:hover { transform: translateY(-3px); border-color: rgba(99,102,241,.5); }
.scenario-media { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; background: #0a0f18; }
.scenario-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s; }
.scenario-card:hover .scenario-media img { transform: scale(1.05); }
.scenario-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,10,17,.75), transparent 58%); }
.scenario-badge {
  position: absolute; left: 9px; top: 9px; z-index: 2; padding: 2px 7px; border-radius: 5px;
  background: rgba(7,10,17,.66); border: 1px solid rgba(255,255,255,.14);
  font-size: 9px; color: #dbe4f2;
}
.scenario-badge.soon { color: #fde68a; border-color: rgba(251,191,36,.32); background: rgba(251,191,36,.12); }
.scenario-play {
  position: absolute; z-index: 2; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center;
  color: #fff; background: rgba(7,10,17,.42); border: 1px solid rgba(255,255,255,.3);
  opacity: 0; transition: opacity .2s; backdrop-filter: blur(6px);
}
.scenario-card:hover .scenario-play { opacity: 1; }
.scenario-play svg { width: 13px; height: 13px; margin-left: 1px; }
.scenario-body { display: block; padding: 12px 13px 14px; }
.scenario-body b { display: block; font-size: 13.5px; font-weight: 700; }
.scenario-body span { display: block; margin-top: 4px; font-size: 10px; color: #8795aa; }

/* ---------- steps ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.step {
  border: 1px solid var(--line); border-radius: 18px; background: var(--panel);
  padding: 16px; position: relative; overflow: hidden;
}
.step-num { font-size: 11px; color: var(--indigo2); font-weight: 700; letter-spacing: 1px; }
.step h3 { margin: 16px 0 6px; font-size: 16px; }
.step > p { color: var(--muted); font-size: 12px; line-height: 1.8; }
.step-ui {
  margin-top: 10px; border: 1px solid var(--line2); border-radius: 12px; background: #0d1420;
  padding: 11px; min-height: 178px;
}
.mini-title { font-size: 10.5px; color: #c7d2fe; font-weight: 600; margin-bottom: 8px; }
.mini-drop { display: flex; align-items: center; gap: 8px; border: 1px dashed #2a3548; border-radius: 8px; padding: 7px; margin-bottom: 6px; }
.mini-thumb { width: 34px; height: 26px; border-radius: 5px; background: linear-gradient(135deg, #312e81, #0e7490); flex: 0 0 34px; }
.mini-thumb.alt { background: linear-gradient(135deg, #7c3aed, #db2777); }
.mini-drop b { display: block; font-size: 10px; }
.mini-drop small { display: block; color: var(--dim); font-size: 8.5px; margin-top: 2px; }
.mini-preset { border: 1px solid #263247; border-radius: 8px; padding: 7px 8px; margin-bottom: 6px; }
.mini-preset.on { border-color: rgba(99,102,241,.7); background: rgba(99,102,241,.10); }
.mini-preset b { display: block; font-size: 10px; }
.mini-preset small { display: block; color: var(--dim); font-size: 8.5px; margin-top: 2px; }
.mini-progress { height: 6px; border-radius: 99px; background: #151f2e; overflow: hidden; margin: 34px 0 12px; }
.mini-progress i { display: block; height: 100%; background: linear-gradient(90deg, #6366f1, #22d3ee); }
.mini-row { display: flex; justify-content: space-between; font-size: 9.5px; color: #a9b6c8; margin-top: 6px; }
.mini-row.dim { color: #64748b; }
.showcase { display: grid; grid-template-columns: .85fr 1.15fr; gap: 44px; align-items: center; margin-top: 64px; }
.showcase-copy h3 { font-size: 26px; margin: 8px 0 10px; }
.showcase-copy p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.check-list { list-style: none; display: grid; gap: 8px; margin-top: 16px; }
.check-list li { display: flex; gap: 8px; font-size: 12px; color: #b7c3d5; }
.check-list svg { width: 14px; height: 14px; color: #6ee7b7; flex: 0 0 14px; margin-top: 2px; }

/* ---------- frames ---------- */
.browser-frame { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #0a0f18; box-shadow: 0 30px 70px -36px rgba(0,0,0,.9); }
.browser-bar { height: 30px; display: flex; align-items: center; gap: 5px; padding: 0 10px; border-bottom: 1px solid var(--line); background: #0d1420; }
.browser-bar span { width: 7px; height: 7px; border-radius: 50%; background: #334155; }
.browser-bar span:nth-child(1) { background: #f87171; }
.browser-bar span:nth-child(2) { background: #fbbf24; }
.browser-bar span:nth-child(3) { background: #34d399; }
.browser-bar em { margin-left: 8px; font-style: normal; font-size: 9.5px; color: #64748b; }
.browser-frame img { width: 100%; height: auto; }

/* ---------- modes ---------- */
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.mode-card { border: 1px solid var(--line); border-radius: 20px; background: var(--panel); padding: 22px; }
.mode-card.pro { border-color: rgba(99,102,241,.35); background: linear-gradient(180deg, rgba(99,102,241,.08), rgba(11,16,26,.9) 38%); }
.mode-top { display: flex; align-items: center; justify-content: space-between; }
.mode-tag { font-size: 10px; padding: 3px 8px; border-radius: 5px; background: rgba(148,163,184,.12); color: #cbd5e1; }
.mode-tag.pro { background: rgba(99,102,241,.16); color: #c7d2fe; border: 1px solid rgba(99,102,241,.28); }
.mode-plan { font-size: 10px; color: var(--dim); }
.mode-card h3 { margin: 16px 0 7px; font-size: 21px; }
.mode-card > p { color: var(--muted); font-size: 12px; line-height: 1.8; }
.mode-shot { margin: 16px 0 14px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.mode-shot img { width: 100%; height: 210px; object-fit: cover; object-position: top center; }

/* ---------- studio ---------- */
.studio-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 52px; align-items: center; }
.studio-copy > p, .mobile-copy > p, .contact-card p { color: var(--muted); font-size: 14px; line-height: 1.95; margin-top: 14px; }
.studio-steps { display: grid; gap: 10px; margin: 24px 0 22px; }
.studio-steps > div { display: flex; align-items: flex-start; gap: 12px; border-bottom: 1px solid rgba(27,36,52,.7); padding-bottom: 10px; }
.studio-steps b { font-size: 11px; color: var(--indigo2); }
.studio-steps span { font-size: 14px; font-weight: 600; }
.studio-steps em { display: block; font-style: normal; font-weight: 400; font-size: 11px; color: var(--dim); margin-top: 3px; }
.studio-frame { border: 1px solid var(--line); border-radius: 16px; overflow: hidden; background: #0a0f18; box-shadow: 0 30px 70px -36px rgba(0,0,0,.9); }
.studio-frame img { width: 100%; }
.studio-frame figcaption { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 12px; border-top: 1px solid var(--line); }
.studio-frame figcaption span { font-size: 9.5px; color: #93a1b5; border: 1px solid #263247; border-radius: 5px; padding: 2px 6px; }

/* ---------- mobile ---------- */
.mobile-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 60px; align-items: center; }
.phone-wrap { position: relative; display: flex; justify-content: center; }
.phone {
  width: min(280px, 78%); aspect-ratio: 390 / 760; border-radius: 34px; border: 1px solid #2a3548;
  background: #0a0f18; padding: 9px; box-shadow: 0 40px 90px -36px rgba(0,0,0,.95); position: relative; z-index: 2;
}
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top center; border-radius: 26px; }
.phone-notch { position: absolute; left: 50%; top: 14px; transform: translateX(-50%); width: 82px; height: 18px; border-radius: 99px; background: #05070c; z-index: 3; }
.phone-glow { position: absolute; width: 330px; height: 330px; border-radius: 50%; background: radial-gradient(circle, rgba(99,102,241,.28), transparent 65%); filter: blur(20px); z-index: 1; }
.mobile-steps { display: grid; gap: 10px; margin: 22px 0; }
.mobile-steps div { display: flex; gap: 10px; align-items: flex-start; font-size: 12px; color: #b7c3d5; line-height: 1.7; }
.mobile-steps b { width: 20px; height: 20px; border-radius: 50%; background: rgba(99,102,241,.15); color: #c7d2fe; display: grid; place-items: center; font-size: 10px; flex: 0 0 20px; margin-top: 1px; }
.mobile-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.tiny-note { margin-top: 12px; color: var(--dim); font-size: 10.5px; line-height: 1.7; }

/* ---------- download ---------- */
.download-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.download-card { display: flex; align-items: center; gap: 14px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 20px; }
.download-card.disabled { opacity: .72; }
.download-icon { width: 48px; height: 48px; border-radius: 13px; display: grid; place-items: center; font-size: 19px; font-weight: 800; flex: 0 0 48px; }
.download-icon.android { background: rgba(52,211,153,.12); color: #6ee7b7; border: 1px solid rgba(52,211,153,.25); }
.download-icon.windows { background: rgba(34,211,238,.10); color: #67e8f9; border: 1px solid rgba(34,211,238,.22); }
.download-main { flex: 1; min-width: 0; }
.download-title { font-size: 15px; font-weight: 700; }
.download-title span { font-size: 10px; color: var(--indigo2); font-weight: 500; margin-left: 6px; }
.download-main p { color: var(--muted); font-size: 11.5px; line-height: 1.7; margin-top: 5px; }
.download-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }
.download-meta span { font-size: 9.5px; color: #93a1b5; border: 1px solid #263247; border-radius: 5px; padding: 2px 6px; }
.download-foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 16px; color: var(--dim); font-size: 10.5px; }
.download-foot code { color: #93a1b5; word-break: break-all; }
.download-foot a { display: inline-flex; align-items: center; gap: 5px; color: var(--indigo2); }
.download-foot a svg { width: 13px; height: 13px; }

/* ---------- faq ---------- */
.faq-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 56px; align-items: start; }
.faq-head p { color: var(--muted); font-size: 13px; margin-top: 12px; }
.faq-list { display: grid; gap: 8px; }
.faq-list details { border: 1px solid var(--line); border-radius: 12px; background: var(--panel); overflow: hidden; }
.faq-list summary { list-style: none; cursor: pointer; padding: 15px 16px; font-size: 13px; font-weight: 600; display: flex; justify-content: space-between; gap: 12px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--indigo2); font-size: 17px; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { padding: 0 16px 15px; color: var(--muted); font-size: 12px; line-height: 1.9; }

/* ---------- contact ---------- */
.contact-section { padding-top: 40px; }
.contact-card { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; border: 1px solid rgba(99,102,241,.28); border-radius: 22px; padding: 34px; background: linear-gradient(120deg, rgba(99,102,241,.10), rgba(11,16,26,.9) 55%); }
.contact-card p { max-width: 520px; }
.contact-channels { display: grid; gap: 8px; }
.contact-item { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 10px; background: rgba(7,10,17,.5); padding: 11px 13px; font-size: 11.5px; }
.contact-item svg { width: 17px; height: 17px; color: var(--indigo2); }
.contact-item span { color: var(--muted); }
.contact-item b { margin-left: auto; font-weight: 600; color: #c7d2fe; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 48px 0 26px; background: #06080e; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 34px; }
.footer-brand p { color: var(--muted); font-size: 12px; line-height: 1.9; margin: 12px 0; }
.footer-version { font-size: 10px; color: var(--dim); }
.footer-col { display: grid; gap: 9px; align-content: start; }
.footer-col b { font-size: 11px; color: #cbd5e1; margin-bottom: 2px; }
.footer-col a { font-size: 11.5px; color: var(--muted); }
.footer-col a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 36px; padding-top: 18px; border-top: 1px solid rgba(27,36,52,.8); color: var(--dim); font-size: 10px; }
.footer-bottom a { color: var(--dim); }

/* ---------- modal ---------- */
.modal { position: fixed; inset: 0; z-index: 90; display: none; align-items: center; justify-content: center; padding: 22px; }
.modal.open { display: flex; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(2,5,12,.8); backdrop-filter: blur(6px); }
.modal-card { position: relative; z-index: 2; background: #0b101a; border: 1px solid #263247; border-radius: 18px; box-shadow: 0 40px 100px rgba(0,0,0,.6); overflow: hidden; }
.modal-close { position: absolute; right: 12px; top: 12px; z-index: 3; width: 32px; height: 32px; border-radius: 8px; border: 1px solid rgba(255,255,255,.14); background: rgba(7,10,17,.65); color: #cbd5e1; display: grid; place-items: center; }
.modal-close svg { width: 16px; height: 16px; }
.video-card { width: min(960px, 96vw); background: #000; }
.video-card video { width: 100%; max-height: 76vh; background: #000; }
.video-caption { padding: 12px 16px; font-size: 11px; color: var(--muted); background: #0b101a; border-top: 1px solid var(--line); }
.scenario-modal { width: min(760px, 96vw); display: grid; grid-template-columns: 1fr 1fr; }
.scenario-modal-media { min-height: 280px; background: #0a0f18; }
.scenario-modal-media img { width: 100%; height: 100%; object-fit: cover; }
.scenario-modal-body { padding: 26px 24px 22px; }
.scenario-modal-body h3 { font-size: 23px; margin: 8px 0 8px; }
.scenario-modal-body > p { color: var(--muted); font-size: 12.5px; line-height: 1.9; }
.scenario-modal-meta { display: grid; gap: 9px; margin: 18px 0; }
.scenario-modal-meta div { display: flex; justify-content: space-between; gap: 12px; font-size: 11px; border-bottom: 1px solid rgba(27,36,52,.8); padding-bottom: 7px; }
.scenario-modal-meta span { color: var(--dim); }
.scenario-modal-meta b { color: #cbd5e1; font-weight: 600; text-align: right; }
.scenario-modal-actions { display: flex; gap: 9px; flex-wrap: wrap; }

/* ---------- reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 34px; }
  .hero { min-height: 660px; }
  .hero-card { justify-self: start; width: min(420px, 100%); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .section-head { grid-template-columns: 1fr; gap: 14px; }
  .showcase, .studio-grid, .mobile-grid { grid-template-columns: 1fr; gap: 30px; }
  .mode-grid, .download-grid { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-card { grid-template-columns: 1fr; gap: 22px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
}
@media (max-width: 820px) {
  .nav-links {
    position: fixed; left: 16px; right: 16px; top: 74px; z-index: 60;
    display: none; flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(11,16,26,.98); border: 1px solid var(--line); border-radius: 14px; padding: 8px;
    box-shadow: 0 24px 60px rgba(0,0,0,.6);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; border-radius: 8px; }
  .nav-links a:hover { background: rgba(99,102,241,.08); }
  .nav-toggle { display: grid; place-items: center; }
  .nav-actions .btn { display: none; }
  .steps { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .hero { padding-top: 106px; min-height: 0; }
  .hero-card { display: none; }
  .hero h1 { letter-spacing: -.9px; }
  .hero-lead { font-size: 14px; }
  .scenario-modal { grid-template-columns: 1fr; max-height: 88vh; overflow-y: auto; }
  .scenario-modal-media { min-height: 200px; max-height: 260px; }
  .scenario-modal-media img { max-height: 260px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .container { width: calc(100% - 32px); }
  .nav-inner { gap: 10px; }
  .brand-name { font-size: 15px; }
  .hero { padding-top: 96px; padding-bottom: 34px; }
  .hero h1 { font-size: 38px; }
  .hero-cta .btn { width: 100%; }
  .hero-proof { gap: 8px 14px; font-size: 10px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-media { aspect-ratio: 16 / 10; }
  .mode-card { padding: 18px; }
  .mode-shot img { height: 170px; }
  .contact-card { padding: 22px; }
  .download-card { flex-wrap: wrap; }
  .download-card .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .phone { width: 74%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-video { display: none; }
  .hero { background: url('/assets/hero-poster.jpg') center/cover no-repeat; }
}

html { scroll-padding-top: 84px; }
body.modal-open { overflow: hidden; }

/* ---------- 子页面：下载 / 法务 ---------- */
.subpage { padding-top: 68px; }
.page-hero {
  padding: 76px 0 46px; border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 420px at 14% -20%, rgba(99,102,241,.16), transparent 62%),
    radial-gradient(700px 360px at 96% 0%, rgba(34,211,238,.07), transparent 60%),
    var(--bg);
}
.page-hero h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.8px; margin: 10px 0 12px; }
.page-hero p { max-width: 760px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.page-section { padding: 56px 0; }
.page-section.alt { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.download-page-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 22px; align-items: start; }
.download-detail, .install-steps { border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 24px; }
.download-detail-head { display: flex; gap: 14px; align-items: flex-start; }
.download-detail-head h2 { font-size: 23px; margin-bottom: 6px; }
.download-detail-head p { color: var(--muted); font-size: 12px; line-height: 1.8; }
.download-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 20px 0; }
.download-facts div { border: 1px solid var(--line); border-radius: 10px; background: #0d1420; padding: 9px 11px; display: flex; justify-content: space-between; gap: 8px; font-size: 11px; }
.download-facts span { color: var(--dim); }
.download-facts b { color: #cbd5e1; font-weight: 600; text-align: right; }
.download-big { width: 100%; }
.sha-box { margin-top: 14px; border: 1px dashed #2a3548; border-radius: 10px; padding: 10px 12px; }
.sha-box span { display: block; font-size: 9.5px; color: var(--dim); margin-bottom: 4px; }
.sha-box code { display: block; font-size: 10px; color: #93a1b5; word-break: break-all; line-height: 1.6; font-family: ui-monospace, Consolas, monospace; }
.install-steps h3 { font-size: 16px; margin-bottom: 16px; }
.install-steps ol { list-style: none; display: grid; gap: 13px; counter-reset: step; }
.install-steps li { position: relative; padding-left: 34px; counter-increment: step; }
.install-steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; background: rgba(99,102,241,.16); color: #c7d2fe; display: grid; place-items: center; font-size: 10px; font-weight: 700; }
.install-steps li b { display: block; font-size: 12.5px; }
.install-steps li span { display: block; color: var(--muted); font-size: 11px; line-height: 1.75; margin-top: 3px; }
.notice { margin-top: 18px; border: 1px solid rgba(251,191,36,.25); background: rgba(251,191,36,.07); color: #fde68a; border-radius: 10px; padding: 10px 12px; font-size: 10.5px; line-height: 1.7; }
.windows-card { display: flex; align-items: center; gap: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--panel); padding: 24px; }
.windows-card h2 { font-size: 22px; margin: 7px 0; }
.windows-card p { color: var(--muted); font-size: 12px; line-height: 1.8; max-width: 640px; }
.windows-card > div:first-child { flex: 1; }
.windows-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.windows-tags span { font-size: 9.5px; color: #93a1b5; border: 1px solid #263247; border-radius: 5px; padding: 2px 6px; }
.narrow { max-width: 860px; }
.narrow-title { font-size: 24px; margin-bottom: 18px; }
.legal-wrap { max-width: 860px; margin: 0 auto; padding: 64px 0 80px; }
.legal-wrap h1 { font-size: 34px; margin-bottom: 8px; }
.legal-meta { color: var(--dim); font-size: 11px; margin-bottom: 28px; }
.legal-wrap h2 { font-size: 18px; margin: 28px 0 10px; }
.legal-wrap p, .legal-wrap li { color: var(--muted); font-size: 12.5px; line-height: 2; }
.legal-wrap ul { padding-left: 20px; margin: 8px 0; }
.legal-placeholder { border: 1px solid rgba(251,191,36,.28); background: rgba(251,191,36,.07); color: #fde68a; border-radius: 10px; padding: 12px 14px; font-size: 11px; line-height: 1.8; margin-bottom: 24px; }
@media (max-width: 900px) {
  .download-page-grid { grid-template-columns: 1fr; }
  .windows-card { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .download-facts { grid-template-columns: 1fr; }
  .page-hero { padding-top: 52px; }
  .legal-wrap { padding: 44px 0 60px; }
}

.scenario-media img { position: absolute; inset: 0; width: 100%; height: 100%; }

.scenario-media img { object-position: center 18%; }