:root {
  --blue: #22a9e6;
  --blue-deep: #0d7fbe;
  --ink: #17283a;
  --muted: #60758b;
  --line: #e7f0f6;
  --soft: #f5fbff;
  --white: #ffffff;
  --green: #32c27c;
  --orange: #ffb648;
  --radius: 8px;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(231, 240, 246, 0.82);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.hero-metrics,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  white-space: nowrap;
}

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.nav-links {
  gap: clamp(18px, 3vw, 34px);
  color: #40576d;
  font-size: 15px;
}

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

.header-action,
.primary-button,
.secondary-button,
.contact a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: var(--radius);
  font-weight: 700;
}

.header-action,
.primary-button,
.contact a {
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--blue-deep));
  box-shadow: 0 14px 34px rgba(34, 169, 230, 0.28);
}

.header-action {
  min-width: 112px;
  padding: 0 18px;
}

.hero {
  position: relative;
  min-height: 92vh;
  padding: 148px clamp(22px, 6vw, 88px) 58px;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 22%, rgba(50, 194, 124, 0.16), transparent 24%),
    linear-gradient(180deg, #eefaff 0%, #ffffff 72%);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 76px;
  background: linear-gradient(180deg, transparent, #ffffff);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(660px, 100%);
}

.eyebrow,
.section-head span,
.contact p {
  margin: 0;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

.hero h1 {
  margin: 16px 0 16px;
  font-size: clamp(46px, 7vw, 82px);
  line-height: 1.03;
  letter-spacing: 0;
}

.hero-copy {
  width: min(560px, 100%);
  margin: 0;
  color: #425a71;
  font-size: clamp(19px, 2.4vw, 28px);
  line-height: 1.58;
}

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

.primary-button,
.secondary-button {
  min-width: 132px;
  padding: 0 24px;
}

.secondary-button {
  color: var(--blue-deep);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(34, 169, 230, 0.28);
}

.hero-metrics {
  position: relative;
  z-index: 2;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 64px;
}

.hero-metrics div {
  min-width: 156px;
  padding: 16px 18px;
  border: 1px solid rgba(34, 169, 230, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.hero-metrics strong {
  display: block;
  font-size: 28px;
  color: var(--blue-deep);
}

.hero-metrics span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.hero-bg {
  position: absolute;
  inset: 116px 4vw auto auto;
  width: min(48vw, 640px);
  height: 520px;
  z-index: 1;
}

.screen {
  position: absolute;
  border: 1px solid rgba(34, 169, 230, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 30px 80px rgba(42, 117, 158, 0.22);
}

.screen-main {
  inset: 34px 28px auto auto;
  width: 520px;
  max-width: 82%;
  height: 330px;
  padding: 24px;
}

.screen-side {
  right: 0;
  bottom: 10px;
  width: 190px;
  height: 330px;
  padding: 22px;
}

.screen-top,
.phone-top {
  height: 16px;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--blue), #8edcff);
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.screen-grid span,
.stat-row b {
  height: 70px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.screen-chart {
  display: flex;
  align-items: end;
  gap: 12px;
  height: 132px;
  margin-top: 24px;
  padding: 18px;
  border-radius: 8px;
  background: linear-gradient(180deg, #f7fcff, #eef9ff);
}

.screen-chart i,
.bar-panel i {
  flex: 1;
  border-radius: 8px 8px 2px 2px;
  background: linear-gradient(180deg, var(--blue), var(--blue-deep));
}

.screen-chart i:nth-child(1) { height: 34%; }
.screen-chart i:nth-child(2) { height: 62%; background: linear-gradient(180deg, var(--green), #159862); }
.screen-chart i:nth-child(3) { height: 48%; }
.screen-chart i:nth-child(4) { height: 78%; background: linear-gradient(180deg, var(--orange), #f18922); }
.screen-chart i:nth-child(5) { height: 58%; }

.phone-card,
.phone-list {
  margin-top: 22px;
  border-radius: 8px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.phone-card {
  height: 102px;
}

.phone-list {
  height: 124px;
}

.section {
  padding: 88px clamp(22px, 6vw, 88px);
}

.section-head {
  width: min(760px, 100%);
  margin: 0 auto 42px;
  text-align: center;
}

.section-head.align-left {
  margin-left: 0;
  text-align: left;
}

.section-head h2 {
  margin: 10px 0 0;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: 0;
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.solution-card,
.steps article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.solution-card {
  min-height: 246px;
  padding: 28px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 169, 230, 0.32);
  box-shadow: 0 22px 48px rgba(24, 96, 136, 0.1);
}

.solution-card h3,
.steps h3 {
  margin: 22px 0 10px;
  font-size: 22px;
}

.solution-card p,
.platform-copy p,
.feature-list,
.steps p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

.cloud-icon {
  position: relative;
  width: 58px;
  height: 40px;
}

.cloud-icon::before,
.cloud-icon::after {
  content: "";
  position: absolute;
  border: 4px solid var(--blue);
}

.cloud-icon::before {
  left: 0;
  bottom: 0;
  width: 50px;
  height: 24px;
  border-radius: 18px;
  background: #ecf9ff;
}

.cloud-icon::after {
  left: 18px;
  top: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border-bottom-color: transparent;
  background: #ecf9ff;
}

.cloud-bolt,
.cloud-shop {
  filter: hue-rotate(0deg);
}

.cloud-share {
  filter: hue-rotate(76deg);
}

.cloud-cart {
  filter: hue-rotate(324deg) saturate(1.2);
}

.platform {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(34px, 6vw, 84px);
  align-items: center;
  background: linear-gradient(180deg, #ffffff, #f4fbff);
}

.platform-copy p {
  margin: 0 0 18px;
}

.feature-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding: 13px 0 13px 30px;
  border-top: 1px solid var(--line);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 19px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: inset 0 0 0 4px #e4f8ee;
}

.dashboard {
  display: grid;
  grid-template-columns: 150px 1fr;
  min-height: 420px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(34, 169, 230, 0.18);
  box-shadow: 0 30px 70px rgba(36, 112, 152, 0.16);
}

.dashboard-nav {
  padding: 30px 20px;
  background: linear-gradient(180deg, #168dcc, #0b6fa9);
}

.dashboard-nav span {
  display: block;
  height: 14px;
  margin-bottom: 22px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.38);
}

.dashboard-main {
  padding: 28px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.bar-panel {
  display: flex;
  align-items: end;
  gap: 14px;
  height: 160px;
  margin-top: 22px;
  padding: 22px;
  border-radius: 8px;
  background: var(--soft);
}

.bar-panel i:nth-child(1) { height: 48%; }
.bar-panel i:nth-child(2) { height: 70%; }
.bar-panel i:nth-child(3) { height: 42%; background: linear-gradient(180deg, var(--green), #159862); }
.bar-panel i:nth-child(4) { height: 86%; }
.bar-panel i:nth-child(5) { height: 62%; background: linear-gradient(180deg, var(--orange), #f18922); }
.bar-panel i:nth-child(6) { height: 54%; }

.table-panel {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.table-panel span {
  height: 18px;
  border-radius: 8px;
  background: #e8f4fb;
}

.cases {
  padding-bottom: 56px;
}

.case-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.case-strip div {
  min-height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  color: #1a5f86;
  font-weight: 700;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(240, 250, 255, 0.92)),
    var(--soft);
  border: 1px solid var(--line);
}

.process {
  padding-top: 56px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.steps article {
  min-height: 210px;
  padding: 26px;
}

.steps span {
  color: var(--blue);
  font-size: 30px;
  font-weight: 800;
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin: 34px clamp(22px, 6vw, 88px) 80px;
  padding: clamp(30px, 5vw, 56px);
  border-radius: 8px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(15, 133, 197, 0.95), rgba(33, 172, 230, 0.92)),
    #168dcc;
}

.contact p {
  color: rgba(255, 255, 255, 0.76);
}

.contact h2 {
  width: min(760px, 100%);
  margin: 10px 0 0;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.25;
}

.contact a {
  flex: 0 0 auto;
  min-width: 138px;
  padding: 0 24px;
  color: var(--blue-deep);
  background: var(--white);
  box-shadow: none;
}

.site-footer {
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(22px, 6vw, 88px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 126px;
  }

  .hero-bg {
    opacity: 0.34;
    right: -160px;
  }

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

  .platform {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  .site-header {
    height: 64px;
    padding: 0 16px;
  }

  .brand {
    font-size: 17px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .header-action {
    min-width: 90px;
    min-height: 38px;
    padding: 0 12px;
    font-size: 13px;
  }

  .hero {
    min-height: 92vh;
    padding: 112px 18px 44px;
  }

  .hero-actions,
  .contact,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .hero-metrics {
    margin-top: 42px;
  }

  .hero-metrics div {
    flex: 1 1 100%;
  }

  .section {
    padding: 62px 18px;
  }

  .solution-grid,
  .steps,
  .case-strip {
    grid-template-columns: 1fr;
  }

  .dashboard {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .dashboard-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    padding: 18px;
  }

  .dashboard-nav span {
    margin: 0;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }

  .contact {
    margin: 20px 18px 56px;
  }

  .contact a {
    width: 100%;
  }
}