:root {
  --bg: #fff4e5;
  --bg-soft: #fde7c9;
  --ink: #1f1c16;
  --accent: #f26b3a;
  --accent-2: #2a9d8f;
  --accent-3: #efb458;
  --card: #ffffff;
  --shadow: 0 18px 40px rgba(31, 28, 22, 0.15);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --max: 1120px;
  --body-font: "HarmonyOS Sans SC", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --title-font: "ZCOOL XiaoWei", "Noto Serif SC", "Source Han Serif SC", "STSong", serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--body-font);
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(242, 107, 58, 0.18), transparent 45%),
    radial-gradient(circle at 88% 8%, rgba(42, 157, 143, 0.18), transparent 48%),
    linear-gradient(120deg, #fff8ef 0%, #fff0dd 50%, #fef6e8 100%),
    repeating-linear-gradient(90deg, rgba(31, 28, 22, 0.035) 0 1px, transparent 1px 14px);
  min-height: 100vh;
}

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

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

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 248, 239, 0.86);
  border-bottom: 1px solid rgba(31, 28, 22, 0.08);
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 2px solid var(--ink);
  background: #fff;
}

.logo span {
  font-family: var(--title-font);
  font-size: 20px;
}

.site-nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 15px;
}

.site-nav a {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.2s ease;
}

.site-nav a:hover {
  border-color: rgba(31, 28, 22, 0.2);
  background: rgba(255, 255, 255, 0.7);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 80px;
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
  gap: 48px;
  padding: 70px 0 30px;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(42, 157, 143, 0.12);
  color: #206b61;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

.hero-title {
  font-family: var(--title-font);
  font-size: clamp(36px, 4vw, 56px);
  margin: 0;
}

.hero-subtitle {
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 700;
  margin: 0;
  color: #2f2a23;
}

.lead {
  font-size: 18px;
  line-height: 1.8;
  margin: 0;
}

.cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 26px;
  border-radius: 999px;
  font-weight: 700;
  border: 2px solid var(--ink);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 12px 24px rgba(242, 107, 58, 0.35);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
}

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

.hero-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(31, 28, 22, 0.8);
}

.hero-art {
  position: relative;
}

.hero-art::before {
  content: "";
  position: absolute;
  top: -16px;
  left: -16px;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(42, 157, 143, 0.25), rgba(239, 180, 88, 0.3));
  transform: rotate(-2deg);
  z-index: 0;
}

.hero-art img {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-lg);
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  animation: float 6s ease-in-out infinite;
}

.hero-badge {
  position: absolute;
  right: -10px;
  bottom: 20px;
  background: #fff;
  border: 2px solid var(--ink);
  border-radius: 999px;
  padding: 8px 16px;
  font-weight: 700;
  box-shadow: var(--shadow);
  z-index: 2;
}

.section {
  padding: 60px 0;
}

.section.alt {
  padding: 60px 0 70px;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.section-head h2 {
  font-family: var(--title-font);
  font-size: clamp(26px, 3vw, 36px);
  margin: 0;
}

.section-head p {
  margin: 0;
  font-size: 16px;
  color: rgba(31, 28, 22, 0.75);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border-radius: var(--radius-md);
  border: 2px solid var(--ink);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: rgba(242, 107, 58, 0.15);
  color: #b34724;
}

.card h3 {
  margin: 0;
  font-size: 20px;
}

.card p {
  margin: 0;
  line-height: 1.7;
}

.steps {
  display: grid;
  gap: 16px;
}

.step {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-md);
  border: 2px solid rgba(31, 28, 22, 0.12);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: center;
}

.step-number {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent-2);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 18px;
}

.step p {
  margin: 0;
  color: rgba(31, 28, 22, 0.75);
}

.download-card {
  background: linear-gradient(135deg, rgba(242, 107, 58, 0.18), rgba(42, 157, 143, 0.18));
  border-radius: var(--radius-lg);
  border: 2px solid var(--ink);
  padding: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  align-items: center;
  box-shadow: var(--shadow);
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.download-note {
  font-size: 14px;
  color: rgba(31, 28, 22, 0.7);
}

.privacy-preview {
  background: #fff;
  border-radius: var(--radius-md);
  border: 2px dashed rgba(31, 28, 22, 0.4);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.privacy-preview ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.8;
}

.text-link {
  font-weight: 700;
  color: #2a5f57;
}

.site-footer {
  margin-top: 20px;
  padding: 32px 0 40px;
  border-top: 1px solid rgba(31, 28, 22, 0.1);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}

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

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 2px solid var(--ink);
}

.footer-brand span,
.footer-brand strong {
  display: block;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
}

.fade-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp 0.9s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0);
  }
}

.privacy-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 50px 24px 80px;
}

.privacy-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 2px solid var(--ink);
  padding: 32px;
  box-shadow: var(--shadow);
}

.privacy-card h1 {
  font-family: var(--title-font);
  font-size: clamp(30px, 3vw, 40px);
  margin: 0 0 10px;
}

.privacy-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(239, 180, 88, 0.18);
  font-size: 14px;
  margin: 18px 0 22px;
}

.privacy-card h2 {
  margin-top: 26px;
  font-size: 20px;
}

.privacy-card p,
.privacy-card li {
  line-height: 1.8;
}

.privacy-card ul {
  padding-left: 20px;
}

@media (max-width: 900px) {
  .hero {
    padding-top: 50px;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
    gap: 10px;
  }

  .hero-art::before {
    display: none;
  }

  .download-card {
    padding: 24px;
  }
}

@media (max-width: 640px) {
  .cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .step {
    grid-template-columns: 1fr;
  }

  .step-number {
    width: 36px;
    height: 36px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .fade-up,
  .hero-art img {
    animation: none;
    opacity: 1;
    transform: none;
  }
}