:root {
  color: #111111;
  background: #ffffff;
  font-family: "Microsoft YaHei UI", "PingFang SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
}

a {
  color: inherit;
}

.site-header,
.hero,
.section,
.workspace-showcase,
.outline-band,
.download-section,
.site-footer {
  margin: 0 auto;
  max-width: 1180px;
  width: calc(100% - 48px);
}

.site-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  min-height: 82px;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 20px;
  font-weight: 800;
  gap: 9px;
  letter-spacing: 0;
  text-decoration: none;
}

.brand-mark {
  display: block;
  height: 30px;
  object-fit: contain;
  width: 30px;
}

.site-nav {
  display: flex;
  gap: 30px;
}

.site-nav a,
.site-footer nav a {
  color: #525252;
  text-decoration: none;
}

.site-nav a:hover,
.site-footer nav a:hover,
.recharge-card a:hover {
  color: #111111;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.header-action,
.button {
  align-items: center;
  border: 1px solid transparent;
  display: inline-flex;
  font-weight: 700;
  justify-content: center;
  min-height: 42px;
  padding: 9px 17px;
  text-decoration: none;
}

.header-action {
  border-color: #111111;
  color: #111111;
}

.header-action:hover,
.button-secondary:hover {
  background: #f2f2f2;
}

.hero {
  padding: 112px 0 70px;
}

.eyebrow,
.section-kicker,
.card-label,
.feature-number,
.download-system {
  color: #111111;
  font-size: 14px;
  font-weight: 800;
  margin: 0 0 12px;
}

.hero h1,
.section h2,
.outline-copy h2,
.download-section h2 {
  font-size: clamp(36px, 5vw, 68px);
  letter-spacing: 0;
  line-height: 1.16;
  margin: 0;
}

.hero-copy {
  color: #525252;
  font-size: 19px;
  margin: 25px 0 30px;
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button-primary {
  background: #111111;
  color: #ffffff;
}

.button-primary:hover {
  background: #000000;
}

.button-secondary {
  border-color: #cfcfcf;
  color: #1a1a1a;
}

.hero-footnote {
  color: #737373;
  font-size: 14px;
  margin: 22px 0 0;
}

.workspace-showcase {
  border-top: 1px solid #e5e5e5;
  padding: 26px 0 96px;
}

.workspace-caption {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
}

.workspace-caption p {
  color: #525252;
  margin: 0;
}

.workspace-caption .section-kicker {
  color: #111111;
}

.workspace-showcase img,
.outline-band img {
  border: 1px solid #dcdcdc;
  display: block;
  height: auto;
  max-width: 100%;
}

.section {
  padding: 106px 0;
}

.features {
  border-top: 1px solid #e5e5e5;
}

.section-intro {
  max-width: 670px;
}

.section-intro h2,
.outline-copy h2,
.download-section h2 {
  font-size: clamp(30px, 3.5vw, 48px);
}

.section-intro > p:not(.section-kicker) {
  color: #525252;
  margin: 18px 0 0;
}

.feature-grid {
  display: grid;
  gap: 0;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 56px;
}

.feature-grid article {
  border-left: 1px solid #e5e5e5;
  min-height: 232px;
  padding: 0 32px;
}

.feature-grid article:first-child {
  border-left: 0;
  padding-left: 0;
}

.feature-grid h3 {
  font-size: 23px;
  letter-spacing: 0;
  margin: 6px 0 14px;
}

.feature-grid article > p:last-child {
  color: #525252;
  margin: 0;
}

.outline-band {
  align-items: center;
  border-top: 1px solid #e5e5e5;
  display: grid;
  gap: 58px;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  padding: 106px 0;
}

.outline-copy > p:last-child {
  color: #525252;
  margin: 22px 0 0;
}

.text-link {
  color: #111111;
  display: inline-block;
  font-weight: 700;
  margin-top: 22px;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.pricing-section {
  border-top: 1px solid #e5e5e5;
}

.pricing-intro {
  max-width: 640px;
}

.pricing-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  margin-top: 50px;
}

.activation-card,
.recharge-card,
.download-panel {
  border: 1px solid #dcdcdc;
  padding: 32px;
}

.activation-card {
  background: #171717;
  color: #ffffff;
}

.activation-card .card-label,
.activation-card .price-note {
  color: #d4d4d4;
}

.price {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1;
  margin: 18px 0 10px;
}

.price span {
  font-size: 24px;
  vertical-align: 18px;
}

.price-note {
  margin: 0;
}

.activation-card ul {
  border-top: 1px solid #4b4b4b;
  list-style: none;
  margin: 30px 0 0;
  padding: 20px 0 0;
}

.activation-card li + li {
  margin-top: 8px;
}

.recharge-card {
  background: #f7f7f7;
}

.recharge-options {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 26px 0;
}

.recharge-options span {
  border: 1px solid #bdbdbd;
  color: #111111;
  font-size: 20px;
  font-weight: 800;
  padding: 12px;
  text-align: center;
}

.recharge-card p {
  color: #525252;
  margin: 0 0 20px;
}

.recharge-card a {
  color: #111111;
  font-weight: 700;
}

.download-section {
  align-items: start;
  border-top: 1px solid #e5e5e5;
  display: grid;
  gap: 64px;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  padding: 106px 0;
}

.download-hash {
  color: #737373;
  font-size: 11px;
  line-height: 1.5;
  margin: 10px 0 18px;
  overflow-wrap: anywhere;
}

.download-hash code {
  color: #525252;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.download-section > div > p:not(.section-kicker) {
  color: #525252;
  margin: 22px 0 0;
  max-width: 620px;
}

.download-panel {
  background: #ffffff;
}

.download-note {
  color: #525252;
  margin: 0 0 24px;
}

.support-section {
  border-top: 1px solid #e5e5e5;
}

.support-section .section-intro {
  max-width: 670px;
}

.support-email {
  color: #111111;
  display: inline-block;
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800;
  margin-top: 32px;
  text-decoration: none;
}

.support-email:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.site-footer {
  border-top: 1px solid #e5e5e5;
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr auto;
  padding: 38px 0 42px;
}

.footer-brand {
  font-size: 18px;
}

.site-footer p {
  color: #737373;
  font-size: 14px;
  margin: 8px 0 0;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  justify-content: end;
}

.site-footer .copyright {
  grid-column: 1 / -1;
  margin: 0;
}

.legal-page {
  background: #ffffff;
}

.legal-main {
  margin: 0 auto;
  max-width: 760px;
  padding: 84px 0 110px;
  width: calc(100% - 48px);
}

.legal-main h1 {
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: 0;
  line-height: 1.2;
  margin: 0;
}

.legal-meta {
  color: #737373;
  font-size: 14px;
  margin: 14px 0 48px;
}

.legal-main h2 {
  font-size: 22px;
  letter-spacing: 0;
  margin: 40px 0 12px;
}

.legal-main p,
.legal-main li {
  color: #404040;
}

.legal-main ul {
  padding-left: 20px;
}

.legal-main a {
  color: #111111;
}

.purchase-main {
  margin: 0 auto;
  max-width: 1040px;
  padding: 84px 0 110px;
  width: calc(100% - 48px);
}

.purchase-hero {
  max-width: 720px;
}

.purchase-hero h1 {
  font-size: clamp(34px, 5vw, 58px);
  letter-spacing: 0;
  line-height: 1.18;
  margin: 0 0 20px;
}

.purchase-hero p:not(.section-kicker),
.purchase-card p,
.shop-entry p,
.purchase-steps li {
  color: #404040;
}

.purchase-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 48px;
}

.purchase-card {
  background: #ffffff;
  border: 1px solid #e5e5e5;
  padding: 26px;
}

.purchase-card h2,
.shop-entry h2,
.purchase-steps h2 {
  color: #111111;
  font-size: 24px;
  letter-spacing: 0;
  margin: 0 0 10px;
}

.purchase-card ul,
.purchase-steps ol {
  color: #404040;
  padding-left: 22px;
}

.shop-entry {
  align-items: center;
  background: #f5f5f5;
  display: grid;
  gap: 42px;
  grid-template-columns: minmax(0, 1fr) auto;
  margin-top: 22px;
  padding: 34px;
}

.shop-url {
  font-size: 13px;
  margin: 14px 0 0;
  overflow-wrap: anywhere;
}

.shop-url a {
  color: #111111;
}

.shop-qr-card {
  background: #ffffff;
  margin: 0;
  padding: 12px;
  text-align: center;
}

.shop-qr-card img {
  display: block;
  height: 220px;
  image-rendering: pixelated;
  width: 220px;
}

.shop-qr-card figcaption {
  color: #737373;
  font-size: 12px;
  margin-top: 8px;
}

.purchase-steps {
  border-top: 1px solid #e5e5e5;
  margin-top: 42px;
  padding-top: 32px;
}

.purchase-steps li + li {
  margin-top: 7px;
}

@media (max-width: 760px) {
  .site-header,
  .hero,
  .section,
  .workspace-showcase,
  .outline-band,
  .download-section,
  .site-footer {
    width: calc(100% - 32px);
  }

  .site-header {
    min-height: 70px;
  }

  .site-nav {
    display: none;
  }

  .header-action {
    font-size: 14px;
    min-height: 38px;
    padding: 7px 11px;
  }

  .hero {
    padding: 72px 0 50px;
  }

  .hero-copy {
    font-size: 17px;
  }

  .workspace-showcase {
    padding-bottom: 70px;
  }

  .workspace-caption {
    align-items: start;
    display: block;
  }

  .workspace-caption p + p {
    margin-top: 6px;
  }

  .section,
  .outline-band,
  .download-section {
    padding: 76px 0;
  }

  .feature-grid,
  .outline-band,
  .pricing-grid,
  .download-section {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    gap: 28px;
    margin-top: 40px;
  }

  .feature-grid article,
  .feature-grid article:first-child {
    border-left: 0;
    border-top: 1px solid #e5e5e5;
    min-height: 0;
    padding: 25px 0 0;
  }

  .outline-band {
    gap: 34px;
  }

  .pricing-grid {
    margin-top: 36px;
  }

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

  .activation-card,
  .recharge-card,
  .download-panel {
    padding: 26px;
  }

  .download-section {
    gap: 34px;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .site-footer nav {
    justify-content: start;
  }

  .legal-main {
    padding: 58px 0 80px;
    width: calc(100% - 32px);
  }

  .purchase-main {
    padding: 58px 0 80px;
    width: calc(100% - 32px);
  }

  .purchase-grid,
  .shop-entry {
    grid-template-columns: 1fr;
  }

  .shop-entry {
    gap: 28px;
    padding: 24px;
  }

  .shop-qr-card {
    justify-self: start;
  }
}