:root {
  color-scheme: light;
  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-soft: #eef3ff;
  --surface-accent: #f6f1ff;
  --text: #101828;
  --muted: #5b6476;
  --line: #dbe3f0;
  --brand: #4f46e5;
  --brand-soft: #e8ebff;
  --brand-deep: #2f2c7f;
  --success: #12715b;
  --max-width: 1140px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

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

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

.site-shell {
  min-height: 100vh;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(246, 248, 252, 0.88);
  border-bottom: 1px solid rgba(219, 227, 240, 0.75);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

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

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--surface);
  box-shadow: 0 12px 28px rgba(25, 38, 74, 0.12);
  padding: 8px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.brand-copy span {
  font-size: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav a {
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--brand);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  background: linear-gradient(135deg, #5b50ff 0%, #3c33e6 100%);
  color: #fff !important;
  -webkit-text-fill-color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.22);
}

.hero {
  padding: 88px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
}

.hero h1 {
  margin: 18px 0 18px;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.05;
  font-weight: 800;
}

.hero p {
  margin: 0;
  max-width: 660px;
  font-size: 18px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 18px;
  border-radius: 16px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
}

.button-primary {
  background: linear-gradient(135deg, #5b50ff 0%, #3c33e6 100%);
  color: #fff !important;
  -webkit-text-fill-color: #fff;
  text-shadow: 0 1px 1px rgba(31, 41, 55, 0.12);
  box-shadow: 0 14px 32px rgba(79, 70, 229, 0.24);
}

.button-secondary {
  background: var(--surface);
  border-color: var(--line);
  color: var(--text);
}

.hero-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  padding: 26px;
  border-radius: 32px;
  background: linear-gradient(145deg, var(--surface), #eef2ff);
  box-shadow: 0 24px 60px rgba(29, 41, 77, 0.14);
}

.visual-frame {
  border-radius: 28px;
  overflow: hidden;
  background: linear-gradient(180deg, #f9fbff 0%, #eef2ff 100%);
  border: 1px solid rgba(255, 255, 255, 0.85);
}

.visual-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(219, 227, 240, 0.85);
}

.visual-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #d7deec;
}

.visual-body {
  display: grid;
  gap: 18px;
  padding: 22px;
}

.visual-main {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.visual-logo {
  width: 112px;
  height: 112px;
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 18px 32px rgba(73, 82, 138, 0.14);
  padding: 18px;
}

.visual-copy h2 {
  margin: 0;
  font-size: 28px;
  line-height: 1.18;
}

.visual-copy p {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--muted);
}

.visual-pill-row,
.visual-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.visual-pill {
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--brand-deep);
  display: inline-flex;
  align-items: center;
}

.visual-card {
  flex: 1 1 180px;
  min-height: 116px;
  padding: 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
}

.visual-card strong {
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
}

.visual-card p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.section {
  padding: 36px 0;
}

.section h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.14;
}

.section-intro {
  max-width: 760px;
  font-size: 17px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.feature {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.feature strong {
  display: block;
  font-size: 18px;
  margin-bottom: 10px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.band {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
}

.checklist li {
  position: relative;
  padding-left: 24px;
  color: var(--text);
}

.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--brand);
}

.legal-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 42px;
  padding: 52px 0 72px;
}

.legal-aside {
  position: sticky;
  top: 92px;
  align-self: start;
}

.legal-aside h1 {
  margin: 16px 0 10px;
  font-size: 34px;
  line-height: 1.16;
}

.legal-aside p,
.legal-aside a,
.legal-aside li {
  color: var(--muted);
  font-size: 14px;
}

.legal-aside ul {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.legal-aside a:hover,
.legal-aside a:focus-visible {
  color: var(--brand);
}

.legal-main {
  min-width: 0;
}

.legal-main section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.legal-main h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.legal-main p,
.legal-main li {
  font-size: 15px;
  color: var(--muted);
}

.legal-main ul {
  margin: 14px 0 0;
  padding-left: 20px;
}

.support-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: 42px;
  padding: 52px 0 72px;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 0.75fr);
  gap: 42px;
  padding: 52px 0 72px;
}

.download-copy h1 {
  margin: 16px 0 12px;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
}

.download-copy p {
  color: var(--muted);
  font-size: 17px;
  margin: 0;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.download-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.download-item {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.download-item strong {
  display: block;
  font-size: 18px;
  margin-bottom: 8px;
}

.download-item p {
  margin: 0;
  color: var(--muted);
}

.download-panel {
  display: grid;
  gap: 18px;
}

.download-card {
  padding: 24px;
  border-radius: 28px;
  background: linear-gradient(180deg, var(--surface) 0%, #f3f6ff 100%);
  box-shadow: 0 20px 56px rgba(27, 39, 77, 0.12);
}

.download-card h2 {
  margin: 14px 0 10px;
  font-size: 24px;
}

.download-card p,
.download-card li {
  color: var(--muted);
}

.download-card ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.download-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
}

.support-copy h1 {
  margin: 16px 0 12px;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
}

.support-copy p {
  color: var(--muted);
  font-size: 17px;
  margin: 0;
}

.contact-list,
.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.contact-item,
.faq-item {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.contact-item strong,
.faq-item strong {
  display: block;
  font-size: 18px;
  margin-bottom: 8px;
}

.contact-item p,
.faq-item p {
  margin: 0;
  color: var(--muted);
}

.support-panel {
  padding: 24px;
  border-radius: 28px;
  background: linear-gradient(180deg, var(--surface) 0%, #f3f6ff 100%);
  box-shadow: 0 20px 56px rgba(27, 39, 77, 0.12);
}

.support-panel h2 {
  margin: 0 0 10px;
  font-size: 24px;
}

.support-panel p,
.support-panel li {
  color: var(--muted);
}

.support-panel ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px;
  background: var(--surface);
}

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

.footer-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 14px;
}

.muted {
  color: var(--muted);
}

@media (max-width: 960px) {
  .hero-grid,
  .support-layout,
  .legal-layout,
  .feature-grid,
  .checklist {
    grid-template-columns: 1fr;
  }

  .legal-aside {
    position: static;
  }

  .feature-grid {
    gap: 2px;
  }

  .hero {
    padding-top: 56px;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(var(--max-width), calc(100% - 24px));
  }

  .header-inner {
    min-height: 64px;
  }

  .nav {
    gap: 14px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p,
  .section-intro,
  .support-copy p {
    font-size: 16px;
  }

  .visual-main {
    grid-template-columns: 1fr;
  }

  .visual-logo {
    width: 92px;
    height: 92px;
  }
}