:root {
  color-scheme: dark;
  --bg: #090a0e;
  --surface: #111319;
  --surface-raised: #181b23;
  --text: #f4f6f8;
  --muted: #a2a8b3;
  --line: rgba(255, 255, 255, 0.13);
  --blue: #aac7ee;
  --lime: #d8ef85;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 72px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  background: rgba(9, 10, 14, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

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

nav a:hover,
.footer-links a:hover,
.text-action:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.82fr);
  align-items: center;
  gap: clamp(50px, 8vw, 110px);
  width: min(calc(100% - 40px), var(--max-width));
  min-height: calc(100vh - 72px);
  max-height: 900px;
  margin: 0 auto;
  padding: 70px 0 54px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--lime);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(64px, 9vw, 124px);
  font-weight: 400;
  line-height: 0.88;
}

.hero-lead {
  max-width: 590px;
  margin: 34px 0 0;
  color: #d7dbe1;
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 38px;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid var(--lime);
  border-radius: 6px;
  background: var(--lime);
  color: #10130c;
  font-weight: 700;
}

.primary-action:hover {
  background: #e5f7a7;
}

.text-action {
  color: var(--blue);
  font-weight: 600;
}

.availability {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}

.product-stage {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  min-height: 620px;
  padding-top: 30px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(170, 199, 238, 0.08));
}

.phone-shell {
  position: relative;
  width: min(100%, 360px);
  min-height: 650px;
  padding: 18px 18px 76px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-bottom: 0;
  border-radius: 48px 48px 0 0;
  background: #0c0d11;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}

.phone-status,
.app-heading,
.app-tabs {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.phone-status {
  padding: 0 10px 18px;
  color: #c7cbd3;
  font-size: 11px;
}

.app-heading {
  padding: 8px 4px 22px;
}

.app-heading p {
  margin: 0;
  color: var(--blue);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.app-heading h2 {
  margin: 2px 0 0;
  font-size: 28px;
  line-height: 1.2;
}

.app-heading img {
  width: 46px;
  height: 46px;
  border-radius: 10px;
}

.date-label {
  padding: 7px 10px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.news-item {
  position: relative;
  padding: 18px 10px 17px 24px;
  border-bottom: 1px solid var(--line);
}

.news-item::before {
  position: absolute;
  top: 25px;
  left: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #68707e;
  content: "";
}

.news-item-featured::before {
  width: 8px;
  height: 8px;
  background: var(--lime);
}

.news-item time {
  color: #747b88;
  font-size: 11px;
}

.news-item h3 {
  margin: 5px 0 7px;
  font-size: 15px;
  line-height: 1.45;
}

.news-item p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
}

.news-item > span {
  color: var(--blue);
  font-size: 11px;
}

.app-tabs {
  position: absolute;
  right: 14px;
  bottom: 16px;
  left: 14px;
  gap: 8px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(28, 31, 39, 0.94);
  color: #777f8c;
  font-size: 10px;
}

.app-tabs b {
  color: var(--lime);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: 100%;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-strip span {
  padding: 25px 20px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.trust-strip span:last-child {
  border-right: 0;
}

.section {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 110px 0;
}

.section-heading {
  max-width: 680px;
}

.section h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.12;
}

.section-heading > p:last-child,
.compliance-copy > p:last-child,
.contact-content p {
  color: var(--muted);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 54px;
}

.feature-card {
  min-height: 260px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.feature-number {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.feature-card h3 {
  margin: 70px 0 10px;
  font-size: 24px;
}

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

.compliance {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  border-top: 1px solid var(--line);
}

.company-details {
  margin: 0;
}

.company-details div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.company-details .detail-label {
  color: var(--muted);
  font-size: 13px;
}

.company-details a {
  color: var(--blue);
}

.contact {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: end;
  gap: 70px;
  border-top: 1px solid var(--line);
}

.contact-content a {
  display: inline-block;
  margin-top: 18px;
  color: var(--lime);
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 600;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 30px;
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 100px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}

footer p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.legal-page {
  background: #f5f6f8;
  color: #15171b;
}

.legal-page .site-header {
  position: static;
  border-color: rgba(0, 0, 0, 0.12);
  background: #f5f6f8;
}

.legal-page nav a {
  color: #60656f;
}

.legal-content {
  width: min(calc(100% - 40px), 820px);
  margin: 0 auto;
  padding: 80px 0 120px;
}

.legal-content h1 {
  margin: 0 0 10px;
  font-size: clamp(40px, 7vw, 68px);
  line-height: 1.1;
}

.legal-meta {
  margin: 0 0 56px;
  color: #686e78;
}

.legal-content h2 {
  margin: 48px 0 14px;
  font-size: 25px;
}

.legal-content h3 {
  margin: 28px 0 10px;
  font-size: 18px;
}

.legal-content p,
.legal-content li {
  color: #40454e;
  font-size: 16px;
  line-height: 1.85;
}

.legal-content a {
  color: #315f9e;
  text-decoration: underline;
}

.legal-notice {
  margin: 30px 0;
  padding: 20px 22px;
  border-left: 3px solid #315f9e;
  background: #e8edf5;
}

@media (max-width: 820px) {
  .site-header {
    min-height: 64px;
  }

  nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    max-height: none;
    padding-top: 64px;
  }

  .hero h1 {
    font-size: clamp(58px, 18vw, 88px);
  }

  .product-stage {
    min-height: 560px;
  }

  .phone-shell {
    min-height: 590px;
  }

  .trust-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-strip span:nth-child(2) {
    border-right: 0;
  }

  .trust-strip span:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 80px 0;
  }

  .feature-grid,
  .compliance,
  .contact {
    grid-template-columns: 1fr;
  }

  .compliance,
  .contact {
    gap: 48px;
  }

  footer {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 28px 0;
  }

  footer p {
    text-align: left;
  }
}

@media (max-width: 460px) {
  .site-header,
  .hero,
  .section,
  footer,
  .legal-content {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .brand span {
    font-size: 16px;
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .product-stage {
    min-height: 530px;
    padding-top: 10px;
  }

  .phone-shell {
    min-height: 550px;
    border-radius: 36px 36px 0 0;
  }

  .news-item:nth-of-type(4) {
    display: none;
  }

  .feature-card {
    min-height: 220px;
  }

  .feature-card h3 {
    margin-top: 45px;
  }

  .company-details div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .contact-content a {
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}