:root {
  --purple: #8b7ec8;
  --purple-light: #b8a9dc;
  --purple-dark: #6b5b95;
  --purple-deep: #5a4a82;
  --lavender: #e8e0f5;
  --surface: #faf8fc;
  --text: #2d2640;
  --muted: #8a8499;
  --outline: #d4cbe8;
  --white: #ffffff;
  --shadow: 0 12px 40px rgba(90, 74, 130, 0.12);
  --radius: 16px;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
}

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

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

a:hover {
  color: var(--purple);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(250, 248, 252, 0.92);
  border-bottom: 1px solid var(--outline);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--purple-deep);
  font-weight: 700;
  font-size: 1.15rem;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(139, 126, 200, 0.25);
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
}

.nav a {
  color: var(--text);
  font-weight: 500;
}

.nav a:hover {
  color: var(--purple);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: none;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: var(--white);
  box-shadow: 0 8px 24px rgba(139, 126, 200, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  color: var(--white);
}

.btn-outline {
  background: var(--white);
  color: var(--purple-deep);
  border: 1px solid var(--outline);
}

.header-downloads {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at 85% 10%, rgba(184, 169, 220, 0.35), transparent 42%),
    radial-gradient(circle at 10% 30%, rgba(232, 224, 245, 0.9), transparent 45%),
    var(--surface);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--lavender);
  color: var(--purple-deep);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 18px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  color: var(--purple-deep);
}

.hero-lead {
  margin: 0 0 28px;
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 34rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero-points {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 0.95rem;
}

.hero-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--purple);
  flex-shrink: 0;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-logo {
  width: min(320px, 80%);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.phone-stack {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.phone-frame {
  width: min(240px, 42vw);
  padding: 10px;
  border-radius: 28px;
  background: var(--white);
  box-shadow: var(--shadow);
  border: 1px solid var(--outline);
}

.phone-frame img {
  border-radius: 20px;
}

.section {
  padding: 72px 0;
}

.section-alt {
  background: linear-gradient(180deg, var(--white), var(--surface));
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--purple-deep);
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--outline);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 4px 18px rgba(90, 74, 130, 0.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--lavender);
  color: var(--purple-deep);
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  color: var(--purple-deep);
}

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

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  align-items: center;
}

.showcase-card {
  background: var(--white);
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--outline);
  box-shadow: var(--shadow);
}

.showcase-card h3 {
  margin: 0 0 8px;
  color: var(--purple-deep);
}

.showcase-card p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.92rem;
}

.cta {
  padding: 64px 0;
}

.cta-box {
  background: linear-gradient(135deg, var(--purple-deep), var(--purple));
  color: var(--white);
  border-radius: 24px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--shadow);
}

.cta-box h2 {
  margin: 0 0 12px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.cta-box p {
  margin: 0 0 24px;
  opacity: 0.92;
}

.site-footer {
  padding: 36px 0 48px;
  border-top: 1px solid var(--outline);
  background: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: start;
}

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 10px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.footer-meta {
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.88rem;
}

.footer-beian {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--outline);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  font-size: 0.84rem;
  color: var(--muted);
}

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

.footer-beian a:hover {
  color: var(--purple);
}

.footer-psbeian {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.footer-psbeian img,
.footer-psbeian .beian-badge {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  vertical-align: middle;
  object-fit: contain;
}

.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--outline);
  border-radius: 10px;
  padding: 8px 12px;
  color: var(--purple-deep);
}

@media (max-width: 900px) {
  .hero-grid,
  .features,
  .showcase-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    right: 20px;
    background: var(--white);
    border: 1px solid var(--outline);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow);
  }

  .menu-toggle {
    display: inline-flex;
  }
}