:root {
  color-scheme: light;
  --ink: #202226;
  --muted: #666a70;
  --line: #d9d8d3;
  --paper: #f7f5f0;
  --surface: #ffffff;
  --soft-green: #e8efe9;
  --green: #4d725d;
  --coral: #bd5c42;
  --yellow: #f4c84a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 65px;
  padding: 12px max(20px, calc((100% - 1240px) / 2));
  background: rgba(247, 245, 240, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand,
.nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

.nav {
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}

.nav a,
.text-link {
  text-decoration: none;
}

.nav a:hover,
.text-link:hover {
  color: var(--coral);
}

.hero {
  position: relative;
  display: flex;
  min-height: 690px;
  align-items: center;
  overflow: hidden;
  padding: 72px max(20px, calc((100% - 1240px) / 2)) 88px;
  isolation: isolate;
}

.hero::before {
  position: absolute;
  z-index: -2;
  inset: 0;
  background: url("./图标.jpg") right center / min(52vw, 680px) auto no-repeat;
  content: "";
  opacity: 0.2;
}

.hero::after {
  position: absolute;
  z-index: -1;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--line);
  content: "";
}

.hero-copy {
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 18px;
  font-size: 88px;
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: 42px;
  line-height: 1.12;
  letter-spacing: 0;
}

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

.hero-statement {
  margin-bottom: 18px;
  font-size: 32px;
  font-weight: 750;
  line-height: 1.28;
}

.lead,
.document-lead {
  max-width: 700px;
  color: #3e4248;
  font-size: 20px;
}

.hero-actions,
.document-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 26px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 8px;
  padding: 11px 18px;
  font-weight: 800;
  text-decoration: none;
}

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

.button.primary:hover {
  background: #3b3e43;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.86);
}

.release {
  display: grid;
  max-width: 680px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
}

.release div {
  padding: 14px;
  background: rgba(255, 255, 255, 0.9);
}

.release dt {
  color: var(--muted);
  font-size: 13px;
}

.release dd {
  margin: 2px 0 0;
  font-weight: 800;
}

.value-strip {
  display: grid;
  padding: 0 max(20px, calc((100% - 1240px) / 2));
  color: var(--muted);
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-strip p {
  display: grid;
  gap: 3px;
  min-height: 110px;
  align-content: center;
  margin: 0;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.value-strip p:first-child {
  border-left: 1px solid var(--line);
}

.value-strip strong {
  color: var(--ink);
  font-size: 17px;
}

.band,
.split,
.download-band {
  padding: 84px max(20px, calc((100% - 1240px) / 2));
  border-top: 1px solid var(--line);
}

.band {
  background: var(--surface);
}

.band.muted {
  background: var(--soft-green);
}

.section-head {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-head > p:last-child {
  color: var(--muted);
  font-size: 18px;
}

.feature-grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
}

.feature-grid article {
  min-height: 230px;
  padding: 24px;
  background: var(--surface);
}

.feature-grid p,
.growth-list p,
.privacy-copy,
.plan-table span,
.fine-print {
  color: var(--muted);
}

.feature-index {
  display: block;
  margin-bottom: 34px;
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
}

.split {
  display: grid;
  align-items: start;
  background: var(--paper);
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: 72px;
}

.status-note {
  max-width: 440px;
  margin-top: 24px;
  padding-left: 14px;
  color: var(--muted);
  border-left: 3px solid var(--yellow);
}

.growth-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.growth-list article {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.growth-list p {
  margin-bottom: 0;
}

.privacy-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(0, 1.15fr);
  gap: 72px;
}

.privacy-copy {
  max-width: 760px;
  font-size: 18px;
}

.plan-table {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.plan-table div {
  display: grid;
  padding: 18px;
  background: var(--surface);
  grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
  gap: 18px;
}

.plan-table .recommended-row {
  box-shadow: inset 4px 0 0 var(--green);
}

.fine-print {
  max-width: 900px;
  margin: 18px 0 0;
  font-size: 14px;
}

.text-link {
  display: inline-flex;
  margin-top: 4px;
  color: var(--coral);
  font-weight: 800;
}

.download-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #fff;
  background: var(--ink);
}

.download-band .eyebrow {
  color: #bad0bf;
}

.download-band p {
  max-width: 720px;
  color: #d7d8db;
}

.download-band .button {
  flex: 0 0 auto;
  color: var(--ink);
  background: var(--yellow);
  border-color: var(--yellow);
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 24px;
  padding: 26px max(20px, calc((100% - 1240px) / 2));
  color: var(--muted);
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.footer a {
  color: var(--muted);
  text-decoration: none;
}

.footer a:hover {
  color: var(--coral);
}

.document-shell {
  width: min(100% - 40px, 880px);
  margin: 0 auto;
  padding: 64px 0 88px;
}

.document-shell h1 {
  margin-bottom: 18px;
  font-size: 64px;
  line-height: 1;
}

.document-shell h2 {
  margin-top: 48px;
  font-size: 27px;
}

.document-shell .meta {
  color: var(--muted);
}

.document-shell li {
  margin-bottom: 9px;
}

.release-summary {
  display: grid;
  overflow: hidden;
  margin: 34px 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
}

.release-summary div {
  display: grid;
  gap: 4px;
  padding: 18px;
  background: var(--surface);
}

.release-summary span,
.step-list span {
  color: var(--muted);
}

.download-trust {
  padding: 14px 16px;
  background: var(--soft-green);
  border-left: 3px solid var(--green);
}

.check-list {
  padding-left: 22px;
}

.step-list {
  display: grid;
  padding: 0;
  list-style: none;
  counter-reset: install-step;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.step-list li {
  position: relative;
  display: grid;
  gap: 3px;
  min-height: 92px;
  align-content: center;
  margin: 0;
  padding: 16px 18px 16px 64px;
  background: var(--surface);
  counter-increment: install-step;
}

.step-list li::before {
  position: absolute;
  top: 25px;
  left: 20px;
  width: 28px;
  height: 28px;
  color: #fff;
  background: var(--ink);
  border-radius: 50%;
  content: counter(install-step);
  font-size: 13px;
  font-weight: 800;
  line-height: 28px;
  text-align: center;
}

@media (max-width: 900px) {
  .hero {
    min-height: 620px;
  }

  .hero::before {
    background: url("./图标.jpg") right center / 520px auto no-repeat;
    opacity: 0.16;
  }

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

  .split,
  .privacy-band {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .nav {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    text-align: center;
  }

  .hero {
    min-height: 650px;
    align-items: flex-end;
    padding-top: 170px;
    padding-bottom: 52px;
  }

  .hero::before {
    background: url("./图标.jpg") center -135px / 420px auto no-repeat;
    opacity: 0.14;
  }

  h1 {
    font-size: 52px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-statement {
    font-size: 25px;
  }

  .lead,
  .document-lead {
    font-size: 18px;
  }

  .hero-actions,
  .document-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .release,
  .release-summary,
  .value-strip,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .value-strip p,
  .value-strip p:first-child {
    min-height: auto;
    padding: 18px 20px;
    border-right: 0;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }

  .band,
  .split,
  .download-band {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .feature-grid article {
    min-height: 190px;
  }

  .plan-table div {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .download-band {
    align-items: stretch;
    flex-direction: column;
  }

  .document-shell {
    padding-top: 48px;
  }

  .document-shell h1 {
    font-size: 44px;
  }
}