:root {
  --ink: #3d2a39;
  --muted: #8a7385;
  --line: rgba(154, 75, 135, 0.14);
  --rose: #b60f83;
  --rose-dark: #8d1268;
  --rose-soft: #f7d8ee;
  --leaf: #8f5bb8;
  --gold: #cf8b5c;
  --wash: #fbedf7;
  --lilac: #eadbf8;
  --peach: #ffd9d5;
  --panel: rgba(255, 255, 255, 0.78);
  --white: #fff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% 0%, rgba(234, 219, 248, 0.82), transparent 34%),
    radial-gradient(circle at 18% 18%, rgba(255, 217, 213, 0.9), transparent 32%),
    linear-gradient(180deg, #ffe7ee 0%, var(--wash) 48%, #f5eafe 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(255, 247, 252, 0.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: block;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 6px 14px rgba(61, 42, 57, 0.16);
}

.nav {
  display: flex;
  gap: clamp(16px, 4vw, 36px);
  color: var(--muted);
  font-size: 15px;
}

.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 120px clamp(20px, 7vw, 96px) 76px;
  background:
    radial-gradient(circle at 20% 26%, rgba(255, 231, 238, 0.96), rgba(255, 231, 238, 0) 30%),
    linear-gradient(90deg, rgba(255, 246, 252, 0.96) 0%, rgba(255, 232, 245, 0.78) 42%, rgba(235, 211, 248, 0.16) 72%),
    url("../img/hero-yutian.png") center / cover no-repeat;
}

.hero-copy {
  max-width: 560px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--rose-dark);
  font-size: 14px;
  font-weight: 800;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(62px, 12vw, 132px);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 460px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: clamp(20px, 3vw, 28px);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}

.hero-points span {
  padding: 8px 12px;
  color: var(--rose-dark);
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(182, 15, 131, 0.16);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
}

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

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 8px;
  font-weight: 800;
}

.primary-action {
  color: var(--white);
  background: linear-gradient(135deg, var(--rose), #9f4fc2);
  box-shadow: 0 12px 28px rgba(182, 15, 131, 0.18);
}

.secondary-action {
  color: var(--rose-dark);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(182, 15, 131, 0.24);
}

.section {
  scroll-margin-top: 78px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 88px clamp(20px, 5vw, 40px);
}

.section-head {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
}

.section h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

.intro-section .section-head h2 {
  margin-bottom: 16px;
}

.experience-layout {
  display: grid;
  grid-template-columns: 1.25fr 1fr 1fr;
  gap: 16px;
}

.feature-card {
  min-height: 220px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.large-card {
  grid-row: span 2;
  min-height: 456px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: var(--white);
  background:
    linear-gradient(180deg, rgba(182, 15, 131, 0.04), rgba(61, 42, 57, 0.84)),
    url("../img/hero-yutian.png") center / cover no-repeat;
  border: 0;
}

.card-kicker,
.card-number {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

.large-card .card-kicker {
  color: var(--rose-soft);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 24px;
  line-height: 1.2;
}

.feature-card p,
.steps p,
.care-grid p,
.support p {
  color: var(--muted);
}

.large-card p {
  color: rgba(255, 255, 255, 0.88);
}

.flow-section {
  border-top: 1px solid var(--line);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.steps span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  color: var(--white);
  background: var(--leaf);
  border-radius: 8px;
  font-weight: 800;
}

.steps strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.care-section {
  border-top: 1px solid var(--line);
}

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

.care-grid article {
  padding-top: 22px;
  border-top: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--rose), #9f4fc2) 1;
}

.care-grid h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.support {
  display: flex;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--line);
}

.download-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 32px;
  align-items: center;
  border-top: 1px solid var(--line);
}

.download-copy {
  max-width: 680px;
}

.download-copy h2 {
  margin-bottom: 16px;
}

.download-copy p {
  margin-bottom: 26px;
  color: var(--muted);
  font-size: 18px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.qr-panel {
  justify-self: end;
  width: 260px;
  padding: 18px;
  text-align: center;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.qr-panel img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  image-rendering: pixelated;
}

.qr-panel span {
  display: block;
  margin-top: 12px;
  color: var(--rose-dark);
  font-size: 14px;
  font-weight: 800;
}

.support-copy {
  max-width: 620px;
}

.mail-link {
  flex: 0 0 auto;
  padding: 18px 22px;
  color: var(--rose-dark);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(182, 15, 131, 0.22);
  border-radius: 8px;
  font-weight: 800;
  backdrop-filter: blur(16px);
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-links {
  display: inline-flex;
  gap: 14px;
}

.footer a,
.legal-card a {
  color: var(--rose-dark);
  font-weight: 800;
}

.legal-page {
  background:
    radial-gradient(circle at 80% 0%, rgba(234, 219, 248, 0.72), transparent 34%),
    linear-gradient(180deg, #ffe7ee 0%, var(--wash) 56%, #f5eafe 100%);
}

.legal-shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 118px clamp(20px, 5vw, 40px) 72px;
}

.legal-card {
  padding: clamp(28px, 5vw, 54px);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 8px;
  backdrop-filter: blur(16px);
}

.legal-card h1 {
  margin-bottom: 14px;
  font-size: clamp(38px, 7vw, 68px);
  line-height: 1.05;
}

.legal-card h2 {
  margin: 34px 0 12px;
  font-size: clamp(22px, 4vw, 30px);
}

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

.legal-date {
  margin-bottom: 32px;
}

@media (max-width: 860px) {
  .site-header {
    height: 62px;
  }

  .nav {
    gap: 14px;
  }

  .hero {
    min-height: 88vh;
    padding-top: 96px;
    background:
      linear-gradient(180deg, rgba(255, 246, 252, 0.97) 0%, rgba(255, 229, 244, 0.82) 54%, rgba(235, 211, 248, 0.18) 100%),
      url("../img/hero-yutian.png") center / cover no-repeat;
  }

  .experience-layout,
  .steps,
  .care-grid,
  .download-section {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .large-card {
    min-height: auto;
  }

  .large-card {
    min-height: 340px;
  }

  .support,
  .footer {
    display: block;
  }

  .qr-panel {
    justify-self: start;
    width: 100%;
  }

  .footer-links {
    display: flex;
    margin: 10px 0;
  }

  .mail-link {
    margin-top: 18px;
  }
}