:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #5f6b7a;
  --line: #d9e0ea;
  --primary: #2f6f73;
  --primary-dark: #214f52;
  --accent: #7b5d2f;
  --shadow: 0 18px 42px rgba(31, 41, 55, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 6vw;
  border-bottom: 1px solid rgba(217, 224, 234, 0.85);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover,
.footer a:hover {
  color: var(--primary);
}

.hero {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
  gap: 42px;
  align-items: center;
  padding: 76px 6vw 92px;
  background:
    linear-gradient(135deg, rgba(247, 248, 251, 0.95), rgba(235, 241, 242, 0.95)),
    repeating-linear-gradient(0deg, transparent 0 31px, rgba(47, 111, 115, 0.08) 31px 32px),
    repeating-linear-gradient(90deg, transparent 0 31px, rgba(47, 111, 115, 0.08) 31px 32px);
}

.hero-content {
  max-width: 760px;
  color: var(--text);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--accent);
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(44px, 8vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: 32px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-text {
  max-width: 660px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 18px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
}

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

.button.secondary {
  border: 1px solid var(--primary);
  color: var(--primary-dark);
}

.hero-visual {
  width: min(100%, 520px);
  min-height: 330px;
  justify-self: end;
  padding: 28px;
  border: 1px solid rgba(47, 111, 115, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.window {
  display: flex;
  gap: 8px;
  margin-bottom: 28px;
}

.window span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #9aa8b4;
}

.line {
  width: 72%;
  height: 12px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: #d8e3e6;
}

.line.wide {
  width: 100%;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.mini-grid span {
  display: grid;
  min-height: 66px;
  place-items: center;
  border: 1px solid #d8e3e6;
  border-radius: 8px;
  background: #f7fafb;
  color: var(--primary-dark);
  font-size: 14px;
  font-weight: 700;
}

.section {
  padding: 78px 6vw;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.tool-card {
  min-height: 170px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.tool-card p,
.copy,
.contact-list {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: 42px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.copy p:last-child {
  margin-bottom: 0;
}

.contact {
  background: #f0f4f7;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
}

.contact-list div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.contact-list dt {
  margin-bottom: 8px;
  color: var(--text);
  font-weight: 700;
}

.contact-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.site-footer {
  display: grid;
  gap: 10px;
  padding: 28px 6vw;
  border-top: 1px solid var(--line);
  background: #202a33;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

.record-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
  }

  .hero {
    min-height: auto;
    padding-top: 84px;
  }

  .tool-grid,
  .split,
  .contact-list {
    grid-template-columns: 1fr;
  }

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

  .hero-visual {
    justify-self: stretch;
  }
}

@media (max-width: 460px) {
  .nav {
    font-size: 13px;
  }

  .section {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  h1 {
    font-size: 42px;
  }
}