:root {
  --bg: #0f0824;
  --bg-2: #211040;
  --primary: #2672ff;
  --accent: #75d4ff;
  --text: #1f2430;
  --muted: #6e7483;
  --white: #ffffff;
  --line: rgba(255, 255, 255, 0.14);
  --shadow: 0 24px 70px rgba(28, 16, 64, 0.2);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: #f6f8ff;
}
a { color: inherit; text-decoration: none; }
.container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(15, 8, 36, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { height: 76px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--white); font-weight: 800; font-size: 22px; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 14px; background: linear-gradient(135deg, var(--primary), #9a60ff); box-shadow: 0 10px 26px rgba(38, 114, 255, 0.45); }
.nav { display: flex; align-items: center; gap: 30px; color: rgba(255,255,255,.86); font-size: 15px; }
.nav a:hover { color: var(--accent); }
.nav-toggle { display: none; color: #fff; background: transparent; border: 0; font-size: 25px; }

.floating-service {
  position: fixed;
  right: 18px;
  top: 96px;
  z-index: 60;
  width: 88px;
  height: 88px;
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  font-size: 13px;
  line-height: 1.35;
  border-radius: 999px;
  background: #087cff;
  box-shadow: 0 12px 34px rgba(8, 124, 255, .38);
  animation: bounce 2.2s infinite;
}

.hero { position: relative; min-height: 760px; overflow: hidden; color: var(--white); background: var(--bg); padding: 150px 0 90px; }
.hero-bg { position: absolute; inset: 0; background: radial-gradient(circle at 70% 30%, rgba(38,114,255,.42), transparent 34%), radial-gradient(circle at 18% 72%, rgba(117,212,255,.18), transparent 28%), linear-gradient(135deg, #120a2b 0%, #211040 55%, #080516 100%); }
.hero-bg::after { content: ""; position: absolute; inset: auto 0 0; height: 45%; background: linear-gradient(to top, #211040, transparent); }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.eyebrow, .section-title p, .cta p { margin: 0 0 12px; color: var(--accent); text-transform: uppercase; letter-spacing: .12em; font-size: 13px; font-weight: 800; }
h1 { margin: 0; max-width: 680px; font-size: clamp(42px, 7vw, 76px); line-height: 1.03; letter-spacing: -0.05em; }
.hero-subtitle { max-width: 650px; color: rgba(255,255,255,.78); font-size: 20px; line-height: 1.8; margin: 26px 0 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 24px; border-radius: 999px; font-weight: 800; transition: transform .2s, box-shadow .2s, background .2s; }
.btn:hover { transform: translateY(-2px); }
.btn.primary { color: #fff; background: linear-gradient(135deg, #2877ff, #7d5cff); box-shadow: 0 16px 34px rgba(43, 113, 255, .35); }
.btn.ghost { color: #fff; border: 1px solid rgba(255,255,255,.22); background: rgba(255,255,255,.08); }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; max-width: 570px; margin-top: 44px; }
.stats div { padding: 18px; border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.08); backdrop-filter: blur(12px); }
.stats strong { display: block; font-size: 25px; color: #fff; }
.stats span { color: rgba(255,255,255,.68); font-size: 13px; }

.phone-stage { position: relative; min-height: 540px; display: grid; place-items: center; }
.phone { width: 290px; height: 570px; border: 12px solid #080913; border-radius: 42px; background: #111827; box-shadow: 0 40px 90px rgba(0,0,0,.45); transform: rotate(5deg); }
.phone-notch { width: 92px; height: 24px; margin: 0 auto; border-radius: 0 0 16px 16px; background: #080913; }
.phone-screen { height: calc(100% - 24px); padding: 28px 20px; border-radius: 28px; background: linear-gradient(160deg, #222061, #102e67 55%, #1ec4ff); overflow: hidden; }
.app-row { display: flex; gap: 12px; }
.app-row i { width: 44px; height: 44px; border-radius: 15px; background: rgba(255,255,255,.25); }
.cloud-chip { margin: 70px 0 24px; padding: 12px 14px; border-radius: 16px; color: #fff; background: rgba(255,255,255,.18); font-weight: 800; }
.game-window { height: 190px; border-radius: 24px; background: linear-gradient(135deg, rgba(255,255,255,.9), rgba(255,255,255,.24)); box-shadow: inset 0 0 0 1px rgba(255,255,255,.35); }
.camera-screen { background: linear-gradient(160deg, #14143f, #102e67 52%, #11d7ff); }
.camera-lens { position: relative; display: grid; place-items: center; background: radial-gradient(circle, #111827 0 18%, #2877ff 19% 31%, #77e8ff 32% 42%, rgba(255,255,255,.18) 43% 100%); }
.camera-lens::before { content: ""; width: 86px; height: 86px; border-radius: 999px; background: radial-gradient(circle at 35% 30%, #fff, #8eeeff 12%, #162044 36%, #020617 70%); box-shadow: 0 0 45px rgba(117,212,255,.75); }
.camera-lens::after { content: "REC"; position: absolute; top: 18px; right: 18px; padding: 5px 10px; border-radius: 999px; color: #fff; background: #ff3158; font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.control-row { display: flex; gap: 10px; margin-top: 18px; }
.control-row span { flex: 1; height: 36px; border-radius: 999px; background: rgba(255,255,255,.25); }
.phone-card { position: absolute; padding: 18px 20px; border-radius: 22px; color: #fff; background: rgba(255,255,255,.12); border: 1px solid var(--line); backdrop-filter: blur(14px); box-shadow: var(--shadow); }
.phone-card span { display: block; color: rgba(255,255,255,.65); font-size: 13px; }
.phone-card strong { font-size: 24px; }
.card-one { left: 20px; top: 95px; }
.card-two { right: 8px; bottom: 100px; }

.section { padding: 92px 0; }
.light { background: #f7f8ff; }
.purple { background: #211040; color: #fff; }
.section-title { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.section-title h2 { margin: 0; font-size: clamp(30px, 4vw, 46px); letter-spacing: -0.04em; }
.section-title.inverse h2 { color: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; }
.feature-card { padding: 28px 22px; border-radius: 28px; background: #fff; box-shadow: 0 18px 50px rgba(28,16,64,.08); }
.icon { font-size: 30px; }
.feature-card h3, .media-card h3, .scenario h3 { margin: 16px 0 10px; font-size: 20px; }
.feature-card p, .media-card p, .scenario p, details p { margin: 0; color: var(--muted); line-height: 1.75; }
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.media-card { padding: 16px 16px 22px; border-radius: 28px; background: rgba(255,255,255,.08); border: 1px solid var(--line); }
.media-card p { color: rgba(255,255,255,.68); }
.thumb { display: block; width: 100%; height: 190px; object-fit: cover; border-radius: 22px; background: rgba(255,255,255,.08); }
.gradient-a { background: linear-gradient(135deg, #5c7cff, #72e1ff); }
.gradient-b { background: linear-gradient(135deg, #fc7bff, #583dff); }
.gradient-c { background: linear-gradient(135deg, #ffd166, #ef476f); }
.gradient-d { background: linear-gradient(135deg, #06d6a0, #118ab2); }
.gradient-e { background: linear-gradient(135deg, #b8f7ff, #5e60ce); }
.gradient-f { background: linear-gradient(135deg, #ff9f1c, #2ec4b6); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario { padding: 32px 24px; border-radius: 28px; background: #fff; box-shadow: 0 18px 50px rgba(28,16,64,.08); }
.scenario span { color: var(--primary); font-weight: 900; font-size: 30px; }
.faq-section { background: #fff; }
.faq-list { max-width: 880px; margin: 0 auto; display: grid; gap: 14px; }
details { padding: 22px 26px; border-radius: 22px; background: #f7f8ff; border: 1px solid #e9ecf8; }
summary { cursor: pointer; font-weight: 800; font-size: 18px; }
details p { margin-top: 12px; }
.cta { padding: 68px 0; color: #fff; background: linear-gradient(135deg, #211040, #2476ff); }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.cta h2 { margin: 0; font-size: clamp(28px, 4vw, 44px); }
.footer { padding: 28px 0; color: rgba(255,255,255,.72); background: #0b061a; }
.footer-inner { display: flex; justify-content: space-between; gap: 20px; }

@keyframes bounce { 0%,20%,50%,80%,100%{ transform: translateY(0); } 40%{ transform: translateY(-12px); } 60%{ transform: translateY(-7px); } }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav { position: absolute; left: 20px; right: 20px; top: 76px; display: none; flex-direction: column; align-items: flex-start; gap: 0; padding: 14px; border-radius: 20px; background: rgba(15,8,36,.96); }
  .nav.open { display: flex; }
  .nav a { width: 100%; padding: 13px 10px; }
  .hero-grid, .card-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .phone-stage { min-height: 500px; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, 1180px); }
  .hero { padding-top: 124px; }
  .stats, .feature-grid, .scenario-grid { grid-template-columns: 1fr; }
  .phone { width: 240px; height: 470px; }
  .phone-card { display: none; }
  .floating-service { width: 76px; height: 76px; font-size: 12px; }
  .cta-inner, .footer-inner { flex-direction: column; align-items: flex-start; }
}