:root {
  color-scheme: light;
  --bg: #f3fbff;
  --surface: #ffffff;
  --surface-blue: #eef8ff;
  --surface-soft: #f7fbff;
  --text: #1f2a37;
  --muted: #6f7f93;
  --line: rgba(83, 124, 247, 0.14);
  --blue: #527cf6;
  --blue-dark: #345fd8;
  --blue-soft: #dcecff;
  --cyan: #c8efff;
  --green: #44d66f;
  --red: #d10000;
  --shadow: 0 22px 60px rgba(82, 124, 246, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #eef9ff 0%, #f8fcff 42%, #ffffff 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #243247;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 10px 24px rgba(82, 124, 246, 0.22);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 6px 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(300px, 0.94fr);
  gap: clamp(36px, 7vw, 88px);
  align-items: center;
  min-height: calc(100vh - 70px);
  padding: clamp(56px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.1;
}

h1 {
  max-width: 760px;
  color: #1f2a37;
  font-size: clamp(42px, 6vw, 72px);
}

h2 {
  color: #243247;
  font-size: clamp(30px, 4vw, 46px);
}

h3 {
  color: #243247;
  font-size: 20px;
}

.lead {
  max-width: 660px;
  margin: 24px 0 0;
  color: #5f6f84;
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 780;
}

.button.primary {
  background: var(--blue);
  color: #ffffff;
  box-shadow: 0 14px 28px rgba(82, 124, 246, 0.22);
}

.button.primary:hover {
  background: var(--blue-dark);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  color: #2c3a4f;
}

.phone-preview {
  display: flex;
  justify-content: center;
}

.phone-shell {
  width: min(100%, 360px);
  min-height: 680px;
  padding: 22px;
  border: 1px solid rgba(82, 124, 246, 0.16);
  border-radius: 30px;
  background:
    linear-gradient(180deg, #d9f2ff 0%, #f4fbff 46%, #ffffff 100%);
  box-shadow: 0 28px 78px rgba(82, 124, 246, 0.20);
}

.phone-status {
  width: 88px;
  height: 7px;
  margin: 0 auto 26px;
  border-radius: 99px;
  background: rgba(34, 48, 71, 0.14);
}

.screen-logo {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 auto 18px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 16px 34px rgba(82, 124, 246, 0.26);
}

.screen-title {
  margin-bottom: 16px;
  color: #2d3748;
  font-size: 26px;
  font-weight: 850;
}

.storage-card {
  padding: 18px;
  border: 1px solid rgba(82, 124, 246, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 14px 34px rgba(82, 124, 246, 0.12);
}

.storage-card span,
.tool-grid span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.storage-card strong {
  display: block;
  margin: 8px 0 14px;
  color: #243247;
  font-size: 38px;
  line-height: 1;
}

.progress {
  height: 8px;
  overflow: hidden;
  border-radius: 99px;
  background: #e6eef9;
}

.progress i {
  display: block;
  width: 62%;
  height: 100%;
  background: var(--blue);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.tool-grid div,
.feature-card,
details,
.support-panel {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 16px 44px rgba(82, 124, 246, 0.10);
}

.tool-grid div {
  min-height: 116px;
  padding: 14px;
  border-radius: 8px;
}

.tool-grid b {
  display: block;
  margin-bottom: 38px;
  color: #2d3748;
  font-size: 16px;
}

.section {
  padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 72px);
}

.section-head {
  max-width: 780px;
  margin-bottom: 30px;
}

.section-head.compact {
  max-width: 360px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 220px;
  padding: 24px;
  border-radius: 8px;
}

.feature-label {
  display: inline-block;
  margin-bottom: 48px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.feature-card p,
.support-panel p,
details p,
.legal p,
.legal li {
  color: #5f6f84;
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 32px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  padding: 18px 20px;
  border-radius: 8px;
}

summary {
  cursor: pointer;
  color: #243247;
  font-weight: 800;
}

details p {
  margin: 12px 0 0;
}

.support-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: clamp(32px, 5vw, 64px) clamp(20px, 5vw, 72px) clamp(56px, 8vw, 96px);
  padding: clamp(24px, 4vw, 44px);
  border-radius: 8px;
  background: linear-gradient(135deg, #ffffff, #eff8ff);
}

.support-panel h2 {
  margin-bottom: 12px;
}

.support-panel p {
  max-width: 620px;
  margin: 0;
}

.support-email {
  display: inline-flex;
  flex-shrink: 0;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--blue);
  color: #ffffff;
  font-weight: 820;
  box-shadow: 0 14px 28px rgba(82, 124, 246, 0.20);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #ffffff;
  font-size: 14px;
}

.footer div {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: flex-end;
}

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

.legal {
  width: min(100% - 40px, 920px);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) 0;
}

.legal h1 {
  color: #1f2a37;
  font-size: clamp(38px, 5vw, 58px);
}

.legal .meta {
  margin: 14px 0 26px;
  color: var(--muted);
}

.legal h2 {
  margin-top: 34px;
  color: #243247;
  font-size: 25px;
}

.legal p,
.legal li {
  font-size: 16px;
}

.legal ul {
  padding-left: 22px;
}

.legal address {
  color: #5f6f84;
  font-style: normal;
}

.notice {
  padding: 16px 18px;
  border: 1px solid rgba(82, 124, 246, 0.18);
  border-radius: 8px;
  background: #eef6ff;
  color: #345fd8;
  font-weight: 760;
}

.todo {
  color: var(--red);
  font-weight: 850;
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero,
  .split {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .support-panel {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .phone-shell {
    min-height: 560px;
  }

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

  .footer div {
    justify-content: flex-start;
  }
}