:root {
  --brand: #1d4ed8;
  --brand-2: #3b82f6;
  --brand-3: #dbeafe;
  --accent: #ff9f1c;
  --green: #22c55e;
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --light: #94a3b8;
  --border: #e2e8f0;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --shadow-soft: 0 10px 28px rgba(15, 23, 42, 0.06);
  --radius: 20px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.72;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.navbar {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: url("../img/logo.png") no-repeat #1d4ed8;
  background-size: cover;
  position: relative;
  box-shadow: 0 10px 24px rgba(29, 78, 216, 0.22);
}

.logo-text {
  display: grid;
  line-height: 1.1;
}

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

.logo-text span {
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand);
  background: var(--brand-3);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  margin: 4px auto;
  border-radius: 999px;
}

.btn {
  border: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 750;
  cursor: pointer;
  transition: 0.18s ease;
  font-size: 15px;
  white-space: nowrap;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.22);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(29, 78, 216, 0.28);
}

.btn-secondary {
  color: var(--brand);
  background: #fff;
  border: 1px solid rgba(29, 78, 216, 0.22);
}

.btn-secondary:hover {
  background: var(--brand-3);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 74px 0 54px;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(6px);
  z-index: -1;
}

.hero::before {
  width: 420px;
  height: 420px;
  right: -120px;
  top: -110px;
  background: rgba(59, 130, 246, 0.12);
}

.hero::after {
  width: 320px;
  height: 320px;
  left: -120px;
  bottom: -160px;
  background: rgba(255, 159, 28, 0.11);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.82fr);
  gap: 52px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--brand);
  background: #eaf3ff;
  font-size: 14px;
  font-weight: 760;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.055em;
  margin: 18px 0 18px;
}

h2 {
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.22;
  letter-spacing: -0.035em;
  margin-bottom: 12px;
}

h3 {
  font-size: 20px;
  line-height: 1.35;
  margin-bottom: 8px;
}

.lead {
  font-size: 18px;
  color: var(--muted);
  max-width: 720px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-note {
  margin-top: 22px;
  color: var(--muted);
  font-size: 14px;
}

.hero-card {
  background: #fff;
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 30px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.product-panel {
  border-radius: 24px;
  padding: 24px;
  background: linear-gradient(160deg, #0f3aa5 0%, #1d4ed8 48%, #3b82f6 100%);
  color: #fff;
  min-height: 500px;
  position: relative;
  overflow: hidden;
}

.product-panel::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 999px;
  right: -88px;
  top: -92px;
  background: rgba(255, 255, 255, 0.14);
}

.product-panel::after {
  content: "";
  position: absolute;
  inset: auto 24px 24px 24px;
  height: 52%;
  border-radius: 24px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.17);
}

.panel-top {
  position: relative;
  z-index: 1;
}

.panel-top span {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.14);
  font-size: 13px;
  font-weight: 750;
}

.panel-top h3 {
  font-size: 28px;
  margin: 18px 0 8px;
}

.panel-top p {
  color: rgba(255,255,255,0.82);
}

.feature-stack {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 34px;
  z-index: 2;
  display: grid;
  gap: 12px;
}

.stack-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  align-items: center;
  padding: 13px;
  border-radius: 18px;
  background: rgba(255,255,255,0.94);
  color: var(--text);
  box-shadow: 0 14px 30px rgba(15,23,42,0.12);
}

.stack-icon {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--brand);
  font-weight: 900;
}

.stack-item strong {
  display: block;
  font-size: 15px;
}

.stack-item small {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.section {
  padding: 70px 0;
}

.section.compact {
  padding: 48px 0;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 28px;
  margin-bottom: 28px;
}

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

.grid-3,
.grid-4,
.grid-2 {
  display: grid;
  gap: 20px;
}

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

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

.card p,
.rich-text p,
.legal-card p,
.list-card p {
  color: var(--muted);
}

.icon-box {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--brand);
  background: var(--brand-3);
  font-weight: 900;
  margin-bottom: 16px;
}

.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  border-radius: 999px;
  background: #eef6ff;
  color: var(--brand);
  font-size: 13px;
  font-weight: 720;
}

.blue-band {
  background: linear-gradient(135deg, #0f3aa5, #1d4ed8 48%, #3b82f6);
  color: #fff;
  border-radius: 30px;
  padding: 42px;
  position: relative;
  overflow: hidden;
}

.blue-band::after {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  right: -120px;
  top: -130px;
}

.blue-band p {
  color: rgba(255,255,255,0.82);
}

.band-content {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: center;
}

.band-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-hero {
  padding: 62px 0 46px;
  background: linear-gradient(180deg, #eff6ff 0%, rgba(248,250,252,0) 100%);
}

.page-hero h1 {
  max-width: 840px;
}

.breadcrumb {
  color: var(--brand);
  font-weight: 780;
  font-size: 14px;
  margin-bottom: 12px;
}

.feature-row {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: start;
  margin-top: 22px;
}

.feature-label {
  position: sticky;
  top: 92px;
}

.feature-label .num {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--brand);
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 16px;
}

.list-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 26px;
  box-shadow: var(--shadow-soft);
}

.clean-list {
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.clean-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 10px;
  color: var(--muted);
}

.clean-list li::before {
  content: "✓";
  width: 22px;
  height: 22px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--green);
  font-size: 12px;
  font-weight: 900;
  margin-top: 2px;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 26px;
  box-shadow: var(--shadow-soft);
}

.contact-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
  border-bottom: 0;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  background: var(--brand-3);
  color: var(--brand);
  font-weight: 900;
}

.contact-item strong {
  display: block;
  margin-bottom: 2px;
}

.contact-item span,
.contact-item a {
  color: var(--muted);
}

.legal-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 34px;
  box-shadow: var(--shadow-soft);
}

.legal-card h2 {
  font-size: 24px;
  margin-top: 28px;
}

.legal-card h2:first-child {
  margin-top: 0;
}

.legal-card ul {
  color: var(--muted);
  padding-left: 22px;
}

.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 50px 0 26px;
  margin-top: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.9fr 1fr;
  gap: 34px;
  padding-bottom: 34px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.22);
}

.site-footer strong,
.site-footer h4 {
  color: #fff;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  font-size: 13px;
  color: #94a3b8;
}

.modal-mask {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(15, 23, 42, 0.56);
  z-index: 60;
  padding: 22px;
}

.modal-mask.show {
  display: grid;
}

.modal {
  width: min(100%, 420px);
  background: #fff;
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 24px 70px rgba(15,23,42,0.28);
}

.modal h3 {
  font-size: 22px;
}

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

.modal-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 22px;
}

@media (max-width: 940px) {
  .hero-grid,
  .grid-3,
  .grid-4,
  .grid-2,
  .footer-grid,
  .feature-row {
    grid-template-columns: 1fr;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
  }

  .nav-links.show {
    display: flex;
  }

  .nav-links a {
    border-radius: 12px;
  }

  .mobile-menu-btn {
    display: block;
  }

  .header-actions .btn {
    display: none;
  }

  .feature-label {
    position: static;
  }

  .band-content,
  .footer-bottom,
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

  .navbar {
    height: 66px;
  }

  .logo-text span {
    display: none;
  }

  .hero,
  .section {
    padding: 48px 0;
  }

  .product-panel {
    min-height: 430px;
  }

  .blue-band,
  .card,
  .legal-card,
  .contact-card,
  .list-card {
    padding: 22px;
  }

  .footer-grid {
    gap: 20px;
  }
}