:root {
  --purple: #7c3aed;
  --purple-deep: #5b21b6;
  --purple-soft: #f3e8ff;
  --purple-mist: #faf5ff;
  --text: #1e1230;
  --text-2: #6b5f7a;
  --line: #e9dff5;
  --white: #ffffff;
  --shadow: 0 12px 40px rgba(124, 58, 237, 0.10);
  --radius: 16px;
  --nav-h: 64px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans SC", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.nav {
  position: sticky; top: 0; z-index: 50; height: var(--nav-h);
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(233,223,245,0.9);
}
.nav-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto; height: 100%;
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-icon {
  width: 36px; height: 36px; border-radius: 10px;
  object-fit: cover; box-shadow: 0 2px 8px rgba(124,58,237,.2);
}
.brand-text em { font-style: normal; color: var(--purple); margin-left: 4px; font-weight: 600; }
.nav-links { display: flex; gap: 18px; margin-left: 8px; flex: 1; flex-wrap: wrap; }
.nav-links a { color: var(--text-2); font-size: 14px; font-weight: 500; }
.nav-links a:hover { color: var(--purple); }
.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px;
  border: 0; background: transparent; flex-direction: column;
  justify-content: center; gap: 5px; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; width: 18px; background: var(--text); margin: 0 auto; border-radius: 2px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 44px; padding: 0 20px; border-radius: 999px;
  font-size: 14px; font-weight: 600; transition: .2s ease;
  border: 1px solid transparent; cursor: pointer;
}
.btn-sm { height: 36px; padding: 0 16px; font-size: 13px; }
.btn-lg { height: 52px; padding: 0 28px; font-size: 15px; }
.btn-primary {
  background: var(--purple); color: #fff;
  box-shadow: 0 8px 24px rgba(124,58,237,.28);
}
.btn-primary:hover { background: var(--purple-deep); transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--purple); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--purple); background: var(--purple-soft); }

.hero { position: relative; padding: 72px 0 88px; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 82% 28%, rgba(124,58,237,.14), transparent 60%),
    radial-gradient(ellipse 40% 40% at 8% 78%, rgba(167,139,250,.10), transparent 50%),
    linear-gradient(180deg, #faf5ff 0%, #ffffff 100%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px; align-items: center;
}
.eyebrow {
  color: var(--purple); font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em; margin-bottom: 12px;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 46px); line-height: 1.22;
  font-weight: 700; letter-spacing: -0.02em; margin-bottom: 18px;
}
.hero h1 .accent {
  background: linear-gradient(90deg, var(--purple), #a78bfa);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead { color: var(--text-2); font-size: 16px; max-width: 500px; margin-bottom: 28px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-meta li {
  font-size: 12px; color: var(--text-2); background: var(--purple-soft);
  border: 1px solid var(--line); padding: 6px 12px; border-radius: 999px; font-weight: 500;
}

.hero-visual { display: flex; justify-content: center; }
.hero-card {
  position: relative; width: min(340px, 88vw);
  aspect-ratio: 3 / 4.3;
  border-radius: 28px;
  background: linear-gradient(165deg, #f5edff 0%, #ffffff 50%, #faf5ff 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex; align-items: flex-end; justify-content: center;
}
.hero-glow {
  position: absolute; width: 70%; height: 50%; left: 15%; top: 12%;
  background: radial-gradient(circle, rgba(124,58,237,.22), transparent 70%);
  filter: blur(22px);
}
.hero-char {
  position: relative; height: 94%; width: auto; object-fit: contain;
  filter: drop-shadow(0 14px 28px rgba(30,18,48,.12));
}
.hero-badge {
  position: absolute; left: 14px; right: 14px; bottom: 14px;
  background: rgba(255,255,255,.9); backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 14px; font-size: 13px; font-weight: 500;
  display: flex; align-items: center; gap: 8px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%; background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34,197,94,.2);
}

.section { padding: 88px 0; }
.section-alt { background: var(--purple-mist); }
.section-head { max-width: 560px; margin-bottom: 40px; }
.section h2 {
  font-size: clamp(26px, 3.5vw, 34px); font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 12px;
}
.section-desc { color: var(--text-2); font-size: 15px; }

.feature-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px; align-items: start;
}
.phone-mock { display: flex; flex-direction: column; align-items: center; }
.phone-bezel {
  width: min(280px, 72vw);
  border-radius: 28px;
  border: 3px solid #2a1f3d;
  background: #111;
  padding: 8px;
  box-shadow: 0 24px 50px rgba(30,18,48,.18);
  overflow: hidden;
}
.phone-bezel img {
  width: 100%; border-radius: 20px; display: block;
}
.phone-caption {
  margin-top: 12px; font-size: 12px; color: var(--text-2);
}
.cards-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 18px;
  box-shadow: 0 4px 20px rgba(30,18,48,.03);
  transition: .2s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #d8c8f0; }
.card-icon {
  width: 40px; height: 40px; border-radius: 12px;
  background: var(--purple-soft); color: var(--purple);
  display: grid; place-items: center; margin-bottom: 12px;
}
.card-icon svg { width: 20px; height: 20px; }
.card h3 { font-size: 16px; margin-bottom: 6px; }
.card p { color: var(--text-2); font-size: 13px; }

.split {
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  gap: 40px; align-items: center;
}
.split.reverse { grid-template-columns: 0.85fr 1.15fr; }
.split.reverse > :first-child { order: 2; }
.bullet-list { margin-top: 20px; display: grid; gap: 10px; }
.bullet-list li {
  position: relative; padding-left: 18px; color: var(--text-2); font-size: 14px;
}
.bullet-list li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 7px; height: 7px; border-radius: 50%; background: var(--purple);
}
.warn-line {
  margin-top: 18px; font-size: 13px; color: #9a6b00;
  background: #fff8e8; border: 1px solid #f0e0b8;
  border-radius: 10px; padding: 10px 14px;
}

.soft-panel {
  background: var(--white); border: 1px solid var(--line);
  border-radius: 20px; padding: 24px; box-shadow: var(--shadow);
}
.soft-panel-dark {
  background: linear-gradient(160deg, #2a1848, #3b1d63);
  color: #fff; border: none;
}
.soft-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--line);
  font-size: 14px; color: var(--text-2);
}
.soft-row:last-of-type { border-bottom: 0; }
.tag {
  font-size: 11px; font-weight: 700; color: var(--purple);
  background: var(--purple-soft); padding: 4px 8px; border-radius: 6px;
}
.soft-note { margin-top: 14px; font-size: 13px; color: var(--text-2); }
.mono-label {
  font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  opacity: .7; margin-bottom: 14px;
}
.steps { display: grid; gap: 12px; }
.steps li {
  font-size: 14px; padding: 10px 12px;
  background: rgba(255,255,255,.08); border-radius: 10px;
  counter-increment: step;
}
.steps { counter-reset: step; }
.steps li::before {
  content: counter(step) ". ";
  font-weight: 700; color: #c4b5fd;
}

.sixi-grid {
  display: grid; grid-template-columns: 0.9fr 1.1fr;
  gap: 40px; align-items: center;
}
.sixi-frame {
  background: var(--white); border: 1px solid var(--line);
  border-radius: 28px; padding: 20px 20px 0;
  box-shadow: var(--shadow);
  display: flex; justify-content: center; min-height: 400px; overflow: hidden;
}
.sixi-frame img { height: min(420px, 70vw); width: auto; object-fit: contain; }
.timeline { margin-top: 24px; display: grid; gap: 12px; }
.timeline li {
  display: grid; grid-template-columns: 64px 1fr; gap: 12px;
  padding: 12px 14px; background: var(--white);
  border: 1px solid var(--line); border-radius: 12px;
}
.timeline strong { color: var(--purple); font-size: 14px; }
.timeline span { color: var(--text-2); font-size: 13px; }

.scene-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.scene-card {
  padding: 24px 20px; border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #faf7ff);
}
.scene-card h3 { margin-bottom: 8px; font-size: 17px; }
.scene-card p { color: var(--text-2); font-size: 14px; }

.safety-box {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 36px;
  background: var(--white); border: 1px solid var(--line);
  border-radius: 24px; padding: 36px; box-shadow: var(--shadow);
}
.safety-list { display: grid; gap: 12px; }
.safety-list li {
  position: relative; padding-left: 20px; color: var(--text-2); font-size: 14px;
}
.safety-list li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 8px; height: 8px; border-radius: 50%; background: var(--purple);
}

.download-panel {
  display: grid; grid-template-columns: 1.4fr 0.6fr; gap: 28px; align-items: center;
  background: linear-gradient(135deg, #5b21b6 0%, #7c3aed 50%, #a78bfa 100%);
  color: #fff; border-radius: 28px; padding: 44px;
  box-shadow: 0 20px 50px rgba(124,58,237,.3);
}
.download-panel .eyebrow { color: rgba(255,255,255,.8); }
.download-panel .section-desc { color: rgba(255,255,255,.88); }
.download-panel h2 { color: #fff; }
.download-actions { margin-top: 22px; }
.download-panel .btn-primary { background: #fff; color: var(--purple); box-shadow: none; }
.download-panel .btn-primary:hover { background: #f5f0ff; }
.hint { margin-top: 12px; font-size: 12px; color: rgba(255,255,255,.75); }
.download-icon {
  width: 120px; height: 120px; margin-left: auto; border-radius: 28px;
  box-shadow: 0 12px 30px rgba(0,0,0,.2);
}

.footer { border-top: 1px solid var(--line); padding: 36px 0 28px; }
.footer-inner { display: grid; gap: 16px; }
.footer-brand { display: flex; gap: 12px; align-items: center; }
.footer-brand img { border-radius: 10px; }
.footer-brand p { color: var(--text-2); font-size: 13px; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--text-2); font-size: 13px; }
.footer-links a:hover { color: var(--purple); }
.copyright { color: #a89bb8; font-size: 12px; }

@media (max-width: 960px) {
  .hero-grid, .feature-layout, .split, .split.reverse,
  .sixi-grid, .safety-box, .download-panel {
    grid-template-columns: 1fr;
  }
  .split.reverse > :first-child { order: 0; }
  .cards-stack { grid-template-columns: 1fr 1fr; }
  .scene-row { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .phone-mock { margin-bottom: 8px; }
  .download-side { display: flex; justify-content: center; }
  .download-icon { margin: 0; }
}
@media (max-width: 720px) {
  .nav-links, .nav-inner > .btn { display: none; }
  .nav-toggle { display: flex; }
  .nav.open .nav-links {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 16px 20px 20px; gap: 12px;
  }
  .cards-stack { grid-template-columns: 1fr; }
  .hero { padding: 36px 0 52px; }
  .section { padding: 56px 0; }
  .safety-box, .download-panel { padding: 24px; }
  .hero-card { width: min(280px, 78vw); }
}