:root {
  --bg: #eef2f9;
  --bg-alt: #e4eaf5;
  --surface: #ffffff;
  --text: #1a2438;
  --muted: #5c6b86;
  --primary: #5b6f98;
  --primary-dark: #46577a;
  --accent: #8fa4d6;
  --line: #d8e0ef;
  --shadow: 0 24px 60px rgba(26, 36, 56, 0.08);
  --radius: 22px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(143, 164, 214, 0.22), transparent 32%),
    radial-gradient(circle at 90% 10%, rgba(91, 111, 152, 0.16), transparent 28%),
    var(--bg);
  line-height: 1.75;
}

a {
  color: var(--primary-dark);
}

.wrap {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid rgba(216, 224, 239, 0.9);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 18px;
}

.brand-text small {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
}

.nav a:hover {
  color: var(--primary-dark);
}

.hero {
  padding: 56px 0 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(91, 111, 152, 0.12);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 58ch;
}

.hero-points {
  margin: 22px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 168px;
  padding: 14px 22px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 14px 30px rgba(91, 111, 152, 0.28);
}

.btn-secondary {
  color: var(--primary-dark);
  background: #f7f9fd;
  border: 1px solid var(--line);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: min(100%, 420px);
  padding: 10px;
  border-radius: 28px;
  background: linear-gradient(180deg, #ffffff, #edf2fb);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.phone-frame img {
  display: block;
  width: 100%;
  border-radius: 18px;
}

.section {
  padding: 28px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0));
}

.section-head {
  margin-bottom: 24px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 38px);
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.intro-card,
.download-card,
.legal-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
}

.intro-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.intro-meta div {
  padding: 16px 18px;
  border-radius: 16px;
  background: #f8faff;
  border: 1px solid var(--line);
}

.intro-meta span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 6px;
}

.service-grid,
.contact-grid,
.screenshot-grid {
  display: grid;
  gap: 18px;
}

.service-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.service-card,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 10px 28px rgba(26, 36, 56, 0.04);
}

.service-card h3,
.contact-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.service-card p,
.contact-card p {
  margin: 0;
  color: var(--muted);
}

.screenshot-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.screenshot-grid figure {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(26, 36, 56, 0.05);
}

.screenshot-grid img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 19.5;
  object-fit: cover;
  background: #eef2f8;
}

.screenshot-grid figcaption {
  padding: 12px 14px 16px;
  font-size: 13px;
  color: var(--muted);
}

.download-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
}

.status-pill {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(91, 111, 152, 0.12);
  color: var(--primary-dark);
  font-weight: 700;
}

.download-note {
  padding: 22px;
  border-radius: 18px;
  background: #f8faff;
  border: 1px solid var(--line);
}

.download-note h3 {
  margin-top: 0;
}

.download-note ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.contact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.legal-page {
  padding: 36px 0 24px;
}

.legal-card h1 {
  font-size: clamp(32px, 4vw, 42px);
}

.legal-card h2 {
  margin-top: 28px;
  font-size: 22px;
}

.legal-meta {
  color: var(--muted);
}

.site-footer {
  margin-top: 24px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
}

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  text-decoration: none;
}

@media (max-width: 1080px) {
  .hero-grid,
  .download-card {
    grid-template-columns: 1fr;
  }

  .screenshot-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .wrap {
    width: min(var(--max), calc(100% - 24px));
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 14px 0;
  }

  .intro-meta,
  .service-grid,
  .contact-grid,
  .screenshot-grid {
    grid-template-columns: 1fr;
  }
}