:root {
  --bg: #f7fbfc;
  --card: #ffffff;
  --text: #102a43;
  --muted: #66788a;
  --line: #dbe7ef;
  --main: #009c9a;
  --main-dark: #087878;
  --shadow: 0 18px 50px rgba(16, 42, 67, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
}

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

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
}

.logo {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: #fff;
  border-radius: 12px;
  background: var(--main);
}

nav {
  display: flex;
  gap: 8px;
}

nav a {
  padding: 8px 12px;
  color: var(--muted);
  font-size: 14px;
  border-radius: 10px;
}

nav a:hover {
  color: var(--main-dark);
  background: #e7f8f7;
}

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px 56px;
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(400px, 1.1fr);
  gap: 44px;
  align-items: center;
  padding: 64px 0 76px;
}

.tag {
  margin: 0 0 14px;
  color: var(--main-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.06em;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.desc {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.desc.small {
  font-size: 15px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.mock-window {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
}

.window-dots {
  display: flex;
  gap: 8px;
  padding: 8px 10px 18px;
}

.window-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #19c37d;
}

.window-dots span:first-child {
  background: #ff6b6b;
}

.window-dots span:nth-child(2) {
  background: #ffc857;
}

.mock-app {
  display: grid;
  grid-template-columns: 164px 1fr;
  min-height: 430px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
}

.mock-app aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px 20px;
  background: #f3f9fc;
}

.mock-app aside b {
  margin-bottom: 8px;
  font-size: 20px;
}

.mock-app aside span,
.mock-app aside strong {
  padding: 12px;
  color: #496174;
  border-radius: 12px;
}

.mock-app aside strong {
  color: var(--main-dark);
  background: #dff6f4;
}

.mock-app section {
  padding: 28px;
}

.mock-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 34px;
}

.mock-tabs b,
.mock-tabs span {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.mock-tabs b {
  color: var(--main-dark);
  background: #dff6f4;
}

.mock-input {
  height: 52px;
  margin-bottom: 20px;
  border: 1px solid #cfdbe4;
  border-radius: 16px;
  background: #f8fcfd;
}

.mock-input.large {
  height: 94px;
}

.mock-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin: 6px 0 40px;
}

.mock-buttons i {
  width: 110px;
  height: 42px;
  border-radius: 13px;
  background: #e2f6f4;
}

.mock-log {
  padding: 18px;
  color: var(--main-dark);
  border-radius: 16px;
  background: #edfafa;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  font-weight: 800;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}

.button.primary {
  color: #fff;
  border-color: var(--main);
  background: var(--main);
}

.button:hover {
  transform: translateY(-1px);
}

.section {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 680px;
  margin-bottom: 28px;
}

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

.cards article,
.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.cards article {
  min-height: 168px;
  padding: 22px;
}

.cards p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

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

.panel h2 {
  margin-bottom: 8px;
}

.contact-box {
  min-width: 300px;
  padding: 20px 24px;
  border-radius: 16px;
  background: #f2fbfa;
}

.contact-box p {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 0;
  line-height: 2.1;
}

.contact-box span {
  min-width: 44px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.contact-box a {
  color: var(--text);
  font-size: 17px;
  font-weight: 800;
}

.contact-box a:hover {
  color: var(--main-dark);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 26px 24px 42px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 560px) {
  .header,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    min-height: auto;
    padding-top: 48px;
  }

  .mock-window {
    padding: 8px;
    border-radius: 22px;
  }

  .mock-app section {
    padding: 20px;
  }

  .mock-app {
    grid-template-columns: 1fr;
  }

  .mock-app aside {
    display: none;
  }

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

  nav {
    width: 100%;
    justify-content: space-between;
  }
}