:root {
  --bg: #f5f8fc;
  --panel: rgba(255, 255, 255, 0.88);
  --panel-strong: #ffffff;
  --text: #142033;
  --muted: #5d6b82;
  --line: rgba(20, 32, 51, 0.1);
  --blue: #2e73ff;
  --blue-deep: #1f53cf;
  --teal: #11a2a8;
  --amber: #d78a11;
  --shadow: 0 18px 48px rgba(20, 40, 80, 0.12);
  --radius: 18px;
}

* {
  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:
    radial-gradient(circle at top left, rgba(46, 115, 255, 0.12), transparent 32%),
    radial-gradient(circle at top right, rgba(17, 162, 168, 0.1), transparent 28%),
    linear-gradient(180deg, #f7faff 0%, #f4f7fb 42%, #eef3f8 100%);
}

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

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

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(245, 248, 252, 0.82);
  border-bottom: 1px solid rgba(20, 32, 51, 0.07);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--blue), var(--teal));
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px rgba(46, 115, 255, 0.3);
  font-size: 15px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-size: 18px;
}

.brand-text span {
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  border-radius: 12px;
}

.hero {
  padding: 56px 0 32px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(46, 115, 255, 0.08);
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
}

.eyebrow i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--blue), var(--amber));
}

.hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero p {
  margin: 0;
  max-width: 640px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 14px;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  color: #fff;
  box-shadow: 0 14px 30px rgba(46, 115, 255, 0.26);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.8);
  border-color: rgba(46, 115, 255, 0.16);
  color: var(--blue-deep);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.meta-card,
.feature-card,
.info-card,
.step-card,
.legal-card,
.contact-card,
.device-card,
.screen-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.meta-card {
  border-radius: 16px;
  padding: 16px 18px;
}

.meta-card strong {
  display: block;
  font-size: 22px;
  line-height: 1.1;
}

.meta-card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.device-frame {
  position: relative;
  border-radius: 28px;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(244, 248, 255, 0.94)),
    linear-gradient(145deg, rgba(46, 115, 255, 0.14), rgba(17, 162, 168, 0.12));
  border: 1px solid rgba(46, 115, 255, 0.12);
  box-shadow: 0 20px 54px rgba(30, 60, 110, 0.12);
}

.device-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
}

.signal {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.signal span {
  width: 6px;
  height: 16px;
  border-radius: 999px;
  background: rgba(46, 115, 255, 0.25);
}

.signal span:nth-child(2) {
  height: 22px;
  background: rgba(17, 162, 168, 0.35);
}

.signal span:nth-child(3) {
  height: 28px;
  background: linear-gradient(180deg, var(--blue), var(--teal));
}

.screen-card {
  border-radius: 22px;
  background: #fff;
  padding: 18px;
}

.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.screen-title {
  font-weight: 800;
  font-size: 17px;
}

.screen-tag {
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(46, 115, 255, 0.08);
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 700;
}

.rec-list {
  display: grid;
  gap: 10px;
}

.rec-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: #f7faff;
  border: 1px solid rgba(46, 115, 255, 0.08);
}

.rec-item strong {
  font-size: 14px;
}

.rec-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
}

.wave {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  padding-top: 4px;
}

.wave i {
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--blue), var(--teal));
}

.wave i:nth-child(1) { height: 10px; }
.wave i:nth-child(2) { height: 16px; }
.wave i:nth-child(3) { height: 24px; }
.wave i:nth-child(4) { height: 14px; }
.wave i:nth-child(5) { height: 20px; }

.section {
  padding: 30px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(24px, 2.7vw, 34px);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  max-width: 640px;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.feature-card,
.info-card,
.step-card,
.contact-card,
.legal-card {
  border-radius: var(--radius);
  padding: 22px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  margin-bottom: 14px;
}

.feature-icon.blue { background: linear-gradient(135deg, var(--blue), #6b97ff); }
.feature-icon.teal { background: linear-gradient(135deg, var(--teal), #49c7c3); }
.feature-icon.amber { background: linear-gradient(135deg, #e0a11f, #f1c35b); }

.feature-card h3,
.info-card h3,
.step-card h3,
.contact-card h3,
.legal-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.feature-card p,
.info-card p,
.step-card p,
.contact-card p,
.legal-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  gap: 10px;
  color: var(--text);
  line-height: 1.6;
}

.check-list li::before {
  content: "";
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--teal));
  flex: none;
}

.timeline {
  display: grid;
  gap: 14px;
}

.step-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
}

.step-no {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(46, 115, 255, 0.1);
  color: var(--blue-deep);
  font-weight: 800;
}

.company-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.info-card {
  min-height: 100%;
}

.info-meta {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.info-meta div {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(247, 250, 255, 0.9);
  color: var(--muted);
  font-size: 14px;
}

.info-meta strong {
  color: var(--text);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.contact-card {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(246, 250, 255, 0.94));
}

.contact-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.contact-list a,
.contact-list span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  line-height: 1.5;
}

.contact-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  margin-top: 12px;
  border-radius: 999px;
  background: rgba(17, 162, 168, 0.1);
  color: #127a7f;
  font-size: 13px;
  font-weight: 700;
}

.footer {
  margin-top: 30px;
  padding: 24px 0 38px;
  border-top: 1px solid rgba(20, 32, 51, 0.08);
  color: var(--muted);
  font-size: 14px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.legal-page {
  padding: 42px 0 30px;
}

.legal-page .article {
  padding: 30px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.legal-page h1 {
  margin: 0 0 14px;
  font-size: clamp(30px, 3.6vw, 46px);
}

.legal-page h2 {
  margin: 28px 0 12px;
  font-size: 20px;
}

.legal-page p,
.legal-page li {
  color: var(--muted);
  line-height: 1.85;
}

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

@media (max-width: 960px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .company-box,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
  }

  .nav.is-open {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: grid;
    gap: 0;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
    overflow: hidden;
  }

  .nav.is-open a {
    padding: 14px 18px;
    border-bottom: 1px solid rgba(20, 32, 51, 0.06);
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .topbar-inner {
    position: relative;
  }

  .hero {
    padding-top: 34px;
  }

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

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 24px, 1180px);
  }

  .legal-page .article {
    padding: 22px 18px;
    border-radius: 20px;
  }

  .hero p {
    font-size: 16px;
  }

  .btn {
    width: 100%;
  }

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