:root {
  --bg: #f7f3ea;
  --bg-card: #fffdf8;
  --green: #6b9b7a;
  --green-dark: #4f7d5e;
  --green-soft: #e8f2eb;
  --brown: #8b7355;
  --text: #3d3a35;
  --text-muted: #7a756c;
  --border: #e8e2d6;
  --shadow: 0 8px 32px rgba(61, 58, 53, 0.08);
  --radius: 16px;
  --max: 1080px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a {
  color: var(--green-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--green), #8fb89a);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--green-dark);
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 48px 20px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.25;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin: 0 0 24px;
}

.hero-features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.hero-features li {
  padding: 10px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 0.92rem;
}

.download-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  border: none;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
  filter: brightness(0.97);
}

.btn-primary {
  background: var(--green);
  color: #fff;
}

.btn-outline {
  background: #fff;
  color: var(--green-dark);
  border: 1px solid var(--green);
}

.phone-frame {
  background: var(--bg-card);
  border-radius: 28px;
  padding: 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.phone-frame img {
  border-radius: 18px;
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  background: linear-gradient(180deg, #eef6f0, #f7f3ea);
}

.phone-placeholder {
  border-radius: 18px;
  aspect-ratio: 9 / 16;
  background: linear-gradient(180deg, #eef6f0 0%, #f7f3ea 100%);
  display: grid;
  place-items: center;
  padding: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.section-title {
  text-align: center;
  margin: 0 0 28px;
  font-size: 1.6rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.page-main {
  max-width: 820px;
  margin: 0 auto;
  padding: 36px 20px 56px;
}

.page-main h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.page-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}

.prose h2 {
  margin: 28px 0 10px;
  font-size: 1.15rem;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose ul,
.prose ol {
  padding-left: 1.25rem;
}

.contact-grid {
  display: grid;
  gap: 16px;
}

.contact-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.contact-item strong {
  display: block;
  margin-bottom: 6px;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: #fffdf8;
  margin-top: 24px;
}

.site-footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 20px 36px;
  display: grid;
  gap: 16px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 0.9rem;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 28px;
  }

  .phone-frame {
    max-width: 320px;
    margin: 0 auto;
  }

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

  .site-nav {
    display: none;
  }
}