:root {
  --bg: #ffffff;
  --surface: #f6f7f8;
  --surface-2: #eef2f3;
  --text: #101418;
  --muted: #5d6872;
  --weak: #8b96a1;
  --line: #e5e9ec;
  --line-strong: #d7dde2;
  --accent: #1d7a68;
  --accent-dark: #0f5e50;
  --accent-soft: #e8f5f1;
  --black: #111111;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shadow: 0 24px 70px rgba(15, 23, 42, .10);
  --shadow-soft: 0 12px 40px rgba(15, 23, 42, .07);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(229,233,236,.76);
}

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: -.02em;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: grid;
  place-items: center;
  background: var(--text);
  color: #fff;
  font-size: 15px;
  letter-spacing: -.08em;
}

.brand-text span {
  display: block;
  font-size: 13px;
  color: var(--weak);
  font-weight: 500;
  letter-spacing: .02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
}

.nav-links a {
  padding: 9px 14px;
  color: var(--muted);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--surface);
  color: var(--text);
}

.nav-actions { display: flex; align-items: center; gap: 12px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--black); color: #fff; box-shadow: 0 12px 28px rgba(0,0,0,.14); }
.btn-primary:hover { background: #242424; box-shadow: 0 16px 34px rgba(0,0,0,.18); }
.btn-outline { background: #fff; color: var(--text); border-color: var(--line-strong); }
.btn-outline:hover { border-color: #b9c2ca; background: var(--surface); }
.btn-soft { background: var(--accent-soft); color: var(--accent-dark); }
.btn-soft:hover { background: #dcefe9; }

.hero {
  padding: 82px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, .78fr);
  align-items: center;
  gap: 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  background: #fff;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

h1, h2, h3, p { margin: 0; }

.hero h1 {
  margin-top: 22px;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 1.04;
  letter-spacing: -.065em;
  font-weight: 800;
}

.hero-lead {
  max-width: 690px;
  margin-top: 24px;
  font-size: clamp(18px, 2vw, 22px);
  color: var(--muted);
  line-height: 1.75;
  letter-spacing: -.015em;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.quick-points {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.quick-point {
  padding: 17px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.quick-point strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
}

.quick-point span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.product-card {
  position: relative;
  min-height: 610px;
  border-radius: 42px;
  background:
    radial-gradient(circle at 20% 10%, rgba(29,122,104,.12), transparent 34%),
    linear-gradient(180deg, #f8fafb 0%, #eef2f3 100%);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  padding: 30px;
}

.phone-frame {
  width: min(310px, 80vw);
  margin: 0 auto;
  border-radius: 42px;
  padding: 10px;
  background: #121820;
  box-shadow: 0 30px 80px rgba(16,20,24,.24);
}

.phone-frame img {
  border-radius: 32px;
  width: 100%;
  aspect-ratio: 829 / 1792;
  object-fit: cover;
  object-position: top center;
}

.floating-note {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 28px;
  padding: 18px 20px;
  background: rgba(255,255,255,.88);
  border: 1px solid rgba(229,233,236,.92);
  backdrop-filter: blur(16px);
  border-radius: 22px;
  box-shadow: var(--shadow-soft);
}

.floating-note strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
}

.floating-note p {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 56px 0;
}

.section.compact { padding: 42px 0; }
.section.tint { background: var(--surface); }

.section-head {
  max-width: 780px;
  margin-bottom: 30px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-kicker {
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section h2 {
  font-size: clamp(31px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: -.045em;
  font-weight: 800;
}

.section-desc {
  margin-top: 14px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: 0 1px 0 rgba(15,23,42,.02);
}

.card h3 {
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -.025em;
}

.card p {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

.card a.more {
  display: inline-flex;
  margin-top: 18px;
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 14px;
}

.download-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 34px;
  border-radius: var(--radius-xl);
  background: var(--text);
  color: #fff;
  box-shadow: var(--shadow);
}

.download-panel p {
  max-width: 720px;
  margin-top: 8px;
  color: rgba(255,255,255,.72);
  font-size: 16px;
}

.download-panel .btn {
  background: #fff;
  color: var(--text);
  min-width: 168px;
}

.page-hero {
  padding: 68px 0 42px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, #f8fafb 100%);
}

.page-hero h1 {
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.06;
  letter-spacing: -.055em;
}

.page-hero p {
  max-width: 760px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.75;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: start;
}

.info-list {
  display: grid;
  gap: 14px;
}

.info-item {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  background: #fff;
}

.info-item strong { display: block; font-size: 18px; margin-bottom: 6px; }
.info-item span { color: var(--muted); font-size: 15px; }

.mock-window {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #fff;
  padding: 18px;
  box-shadow: var(--shadow-soft);
}

.mock-window img {
  border-radius: 14px;
  width: 100%;
  display: block;
}

.mock-bar {
  display: flex;
  gap: 7px;
  padding: 0 0 16px;
  border-bottom: 1px solid var(--line);
}

.mock-bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line-strong);
}

.status-list { display: grid; gap: 12px; margin-top: 18px; }
.status-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: var(--surface);
  color: var(--muted);
}
.status-row b { color: var(--text); }
.status-row em { font-style: normal; color: var(--accent-dark); font-weight: 800; }

.compare-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.compare-table th,
.compare-table td {
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.compare-table th {
  background: var(--surface);
  font-size: 14px;
  color: var(--muted);
}

.compare-table td { color: var(--muted); }
.compare-table td:first-child { color: var(--text); font-weight: 700; }
.compare-table tr:last-child td { border-bottom: none; }
.check { color: var(--accent-dark); font-weight: 900; }
.dash { color: var(--weak); }

.price-card {
  max-width: 430px;
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: 32px;
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.price {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  margin: 18px 0 20px;
}
.price strong { font-size: 64px; letter-spacing: -.06em; line-height: .9; }
.price span { color: var(--muted); padding-bottom: 8px; }

.faq { display: grid; gap: 12px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  padding: 18px 20px;
}
.faq summary { cursor: pointer; font-weight: 800; }
.faq p { color: var(--muted); margin-top: 12px; }

.site-footer {
  padding: 42px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--text); }

.mobile-only { display: none; }

@media (max-width: 900px) {
  .hero-grid, .two-col, .download-panel { grid-template-columns: 1fr; }
  .hero { padding-top: 54px; }
  .product-card { min-height: auto; padding-bottom: 112px; }
  .card-grid, .quick-points { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-actions .btn-outline { display: none; }
  .mobile-only { display: inline-flex; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  .nav { height: 66px; }
  .brand-text span { display: none; }
  .hero h1 { font-size: 42px; }
  .hero-lead, .page-hero p, .section-desc { font-size: 17px; }
  .download-panel { padding: 26px; }
  .compare-table { font-size: 14px; }
  .compare-table th, .compare-table td { padding: 14px 12px; }
}