:root {
  --bg: #fff9f4;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #2b2b38;
  --muted: #6b6f7f;
  --primary: #ff8f66;
  --primary-deep: #ff6f61;
  --secondary: #7db6ff;
  --line: rgba(43, 43, 56, 0.08);
  --shadow: 0 20px 50px rgba(233, 154, 116, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 191, 155, 0.38), transparent 28%),
    radial-gradient(circle at top right, rgba(125, 182, 255, 0.24), transparent 20%),
    linear-gradient(180deg, #fffdfb 0%, var(--bg) 100%);
  line-height: 1.7;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(14px);
  background: rgba(255, 249, 244, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand strong,
.footer-inner strong {
  display: block;
  font-size: 20px;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.brand-badge {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(255, 111, 97, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover,
.footer-links a:hover,
.compliance-links a:hover {
  color: var(--primary-deep);
}

.hero {
  padding: 72px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 143, 102, 0.12);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 600;
}

.hero h1,
.section-heading h2 {
  margin: 16px 0 14px;
  line-height: 1.2;
}

.hero h1 {
  font-size: clamp(42px, 6vw, 64px);
}

.hero-subtitle {
  font-size: 24px;
  line-height: 1.5;
  margin: 0 0 16px;
  color: #3a3d4c;
}

.hero-copy p {
  max-width: 680px;
  color: var(--muted);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-tags span,
.compliance-item span {
  color: var(--muted);
}

.hero-tags span {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: 0 10px 24px rgba(255, 255, 255, 0.55);
}

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

.phone-shell {
  width: min(320px, 80vw);
  padding: 16px;
  border-radius: 38px;
  background: linear-gradient(180deg, #ffffff, #fff5ee);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.9);
}

.phone-shell img {
  border-radius: 28px;
}

.section {
  padding: 42px 0 72px;
}

.section-soft {
  background: rgba(255, 255, 255, 0.4);
}

.section-heading span {
  color: var(--primary-deep);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.section-heading h2 {
  font-size: clamp(28px, 4vw, 42px);
}

.section-desc {
  margin-top: -4px;
  margin-bottom: 24px;
  color: var(--muted);
}

.intro-card,
.compliance-card,
.feature-card,
.screen-card,
.policy-card {
  background: var(--surface-strong);
  border-radius: 28px;
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(113, 102, 126, 0.08);
}

.intro-card {
  padding: 28px;
}

.intro-grid,
.feature-grid {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

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

.intro-grid div,
.feature-card {
  padding: 22px;
  background: rgba(255, 249, 244, 0.72);
  border-radius: 22px;
}

.intro-grid h3,
.feature-card h3,
.policy-card h2,
.policy-card h3 {
  margin-top: 0;
  margin-bottom: 10px;
}

.intro-grid p,
.feature-card p,
.policy-card p,
.policy-card li {
  margin: 0;
  color: var(--muted);
}

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

.screen-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.screen-card {
  padding: 14px;
}

.screen-card img {
  width: 100%;
  border-radius: 20px;
}

.compliance-card {
  padding: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.compliance-item {
  padding: 20px 22px;
  background: rgba(255, 249, 244, 0.78);
  border-radius: 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.compliance-item strong {
  font-size: 18px;
}

.compliance-links div,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.compliance-links a,
.footer-links a {
  color: var(--primary-deep);
  font-weight: 600;
}

.site-footer {
  padding: 28px 0 36px;
  border-top: 1px solid rgba(43, 43, 56, 0.06);
  background: rgba(255, 255, 255, 0.55);
}

.footer-inner,
.footer-copy {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footer-inner p,
.footer-copy {
  color: var(--muted);
}

.footer-copy {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.policy-page {
  padding: 56px 0 72px;
}

.policy-hero {
  margin-bottom: 24px;
}

.policy-card {
  padding: 28px;
  margin-bottom: 18px;
}

.policy-card ul {
  padding-left: 20px;
  margin: 12px 0 0;
}

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

@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .screen-grid,
  .compliance-card,
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 52px;
  }

  .nav {
    min-height: auto;
    padding: 16px 0;
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .hero-subtitle {
    font-size: 19px;
  }

  .footer-inner,
  .footer-copy {
    flex-direction: column;
  }

  .section {
    padding: 32px 0 56px;
  }
}