:root {
  --ink: #102235;
  --muted: #63788d;
  --line: #dbe9f5;
  --paper: #ffffff;
  --soft: #f4f9fd;
  --blue: #4f9ced;
  --blue-deep: #1778de;
  --cyan: #58c8d8;
  --green: #56c98f;
  --warm: #f5c563;
  --shadow: 0 24px 70px rgba(31, 87, 137, 0.16);
  --radius: 8px;
  --header-h: 76px;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 2%, rgba(79, 156, 237, 0.16), transparent 30rem),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 38%, #f6faff 100%);
  font-size: 16px;
  line-height: 1.7;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: #fff;
  border-radius: 6px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 12px;
}

.container {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(249, 252, 255, 0.78);
  border-bottom: 1px solid rgba(219, 233, 245, 0.86);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(1160px, calc(100% - 40px));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  display: block;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 12px 28px rgba(34, 127, 228, 0.2);
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
}

.brand-text {
  display: grid;
  line-height: 1.15;
}

.brand-text strong {
  font-size: 17px;
  letter-spacing: 0;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 9px 14px;
  border-radius: 999px;
  color: #37536d;
  font-size: 14px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue-deep);
  background: #e8f4ff;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  border-radius: 99px;
}

.section {
  position: relative;
  padding: 112px 0;
}

.hero {
  min-height: 100vh;
  padding-top: calc(var(--header-h) + 72px);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(110deg, rgba(79, 156, 237, 0.09) 0 1px, transparent 1px 100%),
    linear-gradient(22deg, transparent 0 62%, rgba(88, 200, 216, 0.12) 62% 74%, transparent 74%);
  background-size: 44px 44px, auto;
  mask-image: linear-gradient(#000 0%, transparent 82%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 64px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue-deep);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(42px, 6vw, 74px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lead,
.section-heading p,
.product-copy > p,
.contact-card p {
  color: var(--muted);
  font-size: 18px;
}

.hero-lead {
  max-width: 620px;
  margin: 24px 0 0;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  box-shadow: 0 16px 36px rgba(34, 127, 228, 0.28);
}

.btn-secondary {
  color: #1e6fbd;
  background: #e8f4ff;
  border: 1px solid #cbe6fb;
}

.hero-signals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 42px 0 0;
}

.hero-signals article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.hero-signals strong {
  display: block;
  font-weight: 900;
  font-size: 17px;
  color: var(--blue-deep);
}

.hero-signals span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.delivery-panel {
  position: absolute;
  left: 0;
  top: 54px;
  width: min(430px, 72%);
  padding: 20px;
  border: 1px solid rgba(202, 225, 243, 0.9);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.panel-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

.panel-top i {
  width: 42px;
  height: 10px;
  border-radius: 999px;
  background: var(--green);
}

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

.pipeline div {
  padding: 16px;
  border-radius: 12px;
  background: #f4f9fd;
  border: 1px solid #e2eef7;
}

.pipeline strong,
.pipeline span {
  display: block;
}

.pipeline span {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
}

.phone {
  position: relative;
  border: 10px solid #111923;
  border-radius: 38px;
  background: #fff;
  box-shadow: 0 28px 68px rgba(12, 41, 72, 0.26);
  overflow: hidden;
}

.phone-hero {
  position: absolute;
  right: 0;
  bottom: 22px;
  width: 238px;
  height: 476px;
}

.phone-speaker {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 3;
  width: 108px;
  height: 24px;
  transform: translateX(-50%);
  border-radius: 0 0 16px 16px;
  background: #111923;
}

.mini-screen {
  width: 100%;
  height: 100%;
  padding: 58px 24px 28px;
}

.blue-screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  background:
    radial-gradient(circle at 8% 0%, rgba(255, 255, 255, 0.22) 0 72px, transparent 74px),
    radial-gradient(circle at 100% 100%, rgba(255, 255, 255, 0.18) 0 106px, transparent 108px),
    linear-gradient(180deg, #5aa4ec, #61a9ef);
}

.app-icon {
  width: 86px;
  height: 86px;
  display: grid;
  place-items: center;
  margin-bottom: 28px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.14);
  border: 2px solid rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 0 28px rgba(255, 255, 255, 0.26);
  font-size: 46px;
  font-weight: 900;
}

.blue-screen strong {
  font-size: 34px;
  line-height: 1.2;
}

.blue-screen span {
  margin-top: 12px;
  letter-spacing: 0.22em;
  font-size: 13px;
}

.blue-screen button {
  margin-top: 58px;
  width: 190px;
  height: 48px;
  border: 0;
  border-radius: 999px;
  color: #2178c9;
  background: rgba(255, 255, 255, 0.62);
  font-weight: 900;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 42px;
}

.section-heading.narrow {
  max-width: 680px;
  text-align: center;
  margin-inline: auto;
}

.service-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.72), #f2f8fd);
}

.service-layout {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 24px;
}

.service-feature,
.service-card,
.product-points article,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 18px 48px rgba(31, 87, 137, 0.1);
}

.service-feature {
  padding: 34px;
  min-height: 100%;
  background:
    linear-gradient(145deg, rgba(79, 156, 237, 0.11), transparent 52%),
    #fff;
}

.feature-number {
  display: inline-flex;
  margin-bottom: 54px;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 900;
}

.service-feature p,
.service-card p,
.product-points p {
  color: var(--muted);
}

.check-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.check-list li {
  padding: 10px 12px;
  border-radius: 999px;
  background: #eaf6ff;
  color: #1d6daf;
  font-weight: 800;
  font-size: 14px;
}

.service-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 190px;
  padding: 26px;
}

.service-card span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 28px;
  margin-bottom: 26px;
  border-radius: 999px;
  background: #edf8fb;
  color: #168fa2;
  font-weight: 900;
  font-size: 13px;
}

.product-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 64px;
  align-items: center;
}

.product-visual {
  min-height: 580px;
}

.phone-stack {
  position: relative;
  min-height: 580px;
}

.phone-dashboard {
  width: 290px;
  height: 560px;
  margin-left: 54px;
}

.dashboard-screen {
  color: var(--ink);
  background: #f8fafc;
}

.app-title {
  padding: 8px 0 20px;
  text-align: center;
  font-weight: 900;
  font-size: 18px;
}

.shop-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0 22px;
}

.shop-row span {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  border-radius: 10px;
  background: linear-gradient(145deg, #5aa2ee, #9ad06b);
}

.metric-grid,
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric-grid i,
.tool-grid i {
  min-height: 78px;
  padding: 12px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(22, 48, 72, 0.08);
  color: #7a8793;
  font-style: normal;
  font-size: 12px;
}

.metric-grid b {
  display: block;
  margin-top: 4px;
  color: var(--blue-deep);
  font-size: 26px;
}

.tool-grid {
  margin-top: 18px;
}

.tool-grid i {
  min-height: 58px;
  display: flex;
  align-items: center;
  color: #26394b;
  font-weight: 900;
}

.brand-preview {
  position: absolute;
  right: 20px;
  bottom: 74px;
  width: 230px;
  min-height: 150px;
  padding: 28px;
  border-radius: 18px;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(14, 35, 54, 0.2), rgba(14, 35, 54, 0.78)),
    linear-gradient(135deg, #5aa2ee, #17324d);
  box-shadow: var(--shadow);
}

.brand-preview strong {
  display: block;
  font-size: 28px;
  line-height: 1.15;
}

.brand-preview span {
  display: block;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.82);
}

.product-points {
  display: grid;
  gap: 14px;
  margin-top: 30px;
}

.product-points article {
  padding: 22px;
}

.contact-section {
  padding-bottom: 80px;
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  padding: 42px;
  background:
    radial-gradient(circle at 100% 0%, rgba(245, 197, 99, 0.22), transparent 18rem),
    #fff;
}

.contact-list {
  display: grid;
  gap: 10px;
  min-width: 220px;
  font-style: normal;
}

.contact-list a,
.contact-list span {
  padding: 12px 14px;
  border-radius: 999px;
  background: #f1f7fc;
  color: #315c83;
  font-weight: 800;
}

.site-footer {
  padding: 28px 0 42px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  text-align: right;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 920px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    left: 20px;
    right: 20px;
    top: calc(var(--header-h) + 10px);
    display: grid;
    gap: 4px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .nav-links.open {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .hero-grid,
  .service-layout,
  .product-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: calc(var(--header-h) + 44px);
  }

  .hero-visual {
    min-height: 520px;
  }

  .delivery-panel {
    width: min(390px, 74%);
  }

  .phone-hero {
    width: 220px;
    height: 448px;
  }

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

  .site-footer p {
    text-align: left;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 68px;
  }

  .container,
  .nav {
    width: min(100% - 28px, 1160px);
  }

  .brand-text small {
    display: none;
  }

  .section {
    padding: 78px 0;
  }

  .hero-signals,
  .service-cards,
  .check-list {
    grid-template-columns: 1fr;
  }

  .hero-signals {
    margin-top: 28px;
  }

  .hero-visual {
    min-height: 620px;
  }

  .delivery-panel {
    position: relative;
    top: 0;
    width: 100%;
  }

  .phone-hero {
    position: absolute;
    left: 50%;
    right: auto;
    bottom: 0;
    width: 224px;
    height: 448px;
    transform: translateX(-50%);
  }

  .hero-actions .btn {
    width: 100%;
  }

  .service-feature,
  .service-card,
  .product-points article,
  .contact-card {
    padding: 22px;
  }

  .product-visual,
  .phone-stack {
    min-height: 610px;
  }

  .phone-dashboard {
    width: 262px;
    height: 520px;
    margin-inline: auto;
  }

  .brand-preview {
    left: 50%;
    right: auto;
    bottom: 0;
    width: min(260px, 84%);
    transform: translateX(-50%);
  }

  .contact-list {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}