:root {
  --bg: #f7f1e8;
  --bg-strong: #f0e5d7;
  --paper: rgba(255, 252, 247, 0.8);
  --panel: #fffaf2;
  --text: #20150e;
  --muted: #70584b;
  --line: rgba(54, 32, 19, 0.12);
  --accent: #db5b33;
  --accent-dark: #aa3818;
  --accent-soft: #ffe1d6;
  --shadow: 0 24px 80px rgba(86, 45, 20, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --content-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(219, 91, 51, 0.14), transparent 30%),
    radial-gradient(circle at top right, rgba(255, 195, 73, 0.16), transparent 28%),
    linear-gradient(180deg, #fff9f1 0%, var(--bg) 45%, #f4ede4 100%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  min-height: 100vh;
}

.hero,
.section,
.footer {
  width: min(calc(100% - 40px), var(--content-width));
  margin: 0 auto;
}

.hero {
  padding: 16px 0 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  background: rgba(255, 251, 245, 0.76);
  border-radius: 999px;
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 35px rgba(102, 65, 37, 0.08);
}

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

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.brand-name {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

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

.hero-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  align-items: center;
  padding-top: 24px;
}

.hero-copy h1 {
  margin: 10px 0 18px;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: -0.04em;
  max-width: 10.5em;
}

.eyebrow,
.section-tag,
.download-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.hero-desc,
.section-heading p,
.feature-card p,
.screen-card p,
.qr-copy p,
.download-card p,
.footer p,
.hero-links,
.ghost-link {
  line-height: 1.7;
}

.hero-desc {
  max-width: 40em;
  color: var(--muted);
  font-size: 16px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0;
}

.hero-badge {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(71, 37, 17, 0.08);
  color: #5e463a;
  font-size: 14px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 18px;
}

.primary-btn,
.secondary-btn {
  min-width: 176px;
  padding: 15px 22px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-weight: 700;
  transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.download-btn-icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
  flex-shrink: 0;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #ff8c57 100%);
  box-shadow: 0 14px 35px rgba(219, 91, 51, 0.28);
}

.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(54, 32, 19, 0.12);
}

.primary-btn:hover,
.secondary-btn:hover,
.download-card:hover {
  transform: translateY(-2px);
}

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

.hero-links a {
  color: var(--accent-dark);
  font-weight: 700;
}

.hero-visual {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.phone-stack {
  position: relative;
  z-index: 1;
  width: min(100%, 300px);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-right: 0;
}

.phone {
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  border: 1px solid rgba(37, 17, 7, 0.12);
  background: linear-gradient(180deg, #fff 0%, #fbf1e4 100%);
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.phone-main {
  width: min(100%, 270px);
  aspect-ratio: 1242 / 2688;
  padding: 6px;
}

.section {
  padding: 52px 0 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin: 14px 0 12px;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-heading p {
  color: var(--muted);
  font-size: 16px;
}

.feature-grid,
.screens-grid,
.download-grid {
  display: grid;
  gap: 20px;
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card,
.screen-card,
.qr-panel,
.download-card {
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.feature-card {
  min-height: 220px;
  padding: 24px;
  border-radius: var(--radius-lg);
}

.feature-card h3,
.screen-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
  line-height: 1.2;
}

.feature-card p,
.screen-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

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

.screen-card {
  padding: 18px;
  border-radius: var(--radius-lg);
}

.screen-frame {
  height: 520px;
  overflow: hidden;
  margin-bottom: 16px;
  border-radius: 22px;
  background: #ead9c8;
}

.screen-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qr-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
  padding: 28px;
  border-radius: var(--radius-xl);
}

.qr-card {
  max-width: 320px;
  justify-self: end;
  padding: 22px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 45px rgba(91, 45, 19, 0.12);
}

.qr-card img {
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  object-fit: cover;
  background: #fff;
}

.qr-card p {
  margin: 14px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

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

.download-card {
  display: block;
  padding: 28px;
  border-radius: var(--radius-lg);
}

.download-card strong {
  display: block;
  margin-top: 16px;
  font-size: 28px;
  letter-spacing: -0.03em;
}

.download-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 56px 0 48px;
  color: var(--muted);
}

.footer strong {
  color: var(--text);
  font-size: 20px;
}

.footer-note {
  max-width: 360px;
  text-align: right;
}

@media (max-width: 1080px) {
  .hero-content,
  .qr-panel,
  .feature-grid,
  .screens-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 300px;
    margin-right: -8px;
  }

  .qr-card {
    justify-self: start;
  }
}

@media (max-width: 760px) {
  .hero,
  .section,
  .footer {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .topbar {
    padding: 12px 14px;
    border-radius: 22px;
  }

  .topbar-actions {
    display: none;
  }

  .hero {
    padding-top: 10px;
    padding-bottom: 12px;
  }

  .hero-content {
    gap: 14px;
    padding-top: 18px;
  }

  .hero-copy h1 {
    font-size: 42px;
  }

  .hero-cta {
    gap: 10px;
    margin-bottom: 14px;
  }

  .primary-btn,
  .secondary-btn {
    min-width: 132px;
    padding: 11px 16px;
    font-size: 14px;
    gap: 8px;
  }

  .download-btn-icon {
    width: 16px;
    height: 16px;
  }

  .hero-visual {
    display: none;
  }

  .phone-main {
    width: min(100%, 220px);
    padding: 4px;
  }

  .screen-frame {
    height: 420px;
  }

  .footer {
    flex-direction: column;
    padding-top: 28px;
  }

  .footer-note {
    text-align: left;
  }
}