:root {
  color-scheme: light;
  --blue: #1749d1;
  --navy: #112851;
  --muted: #50617d;
  --paper: #f3f6fc;
  --line: #d8e2f5;
  --amber: #f0b64b;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
  color: var(--navy);
  background: #fff;
  font-family: "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  cursor: pointer;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
}
p,
h1,
h2,
h3,
figure {
  margin: 0;
}
a.text-link {
  text-decoration: underline;
  text-underline-offset: 6px;
}
.skip {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 100;
  background: #fff;
  padding: 10px;
}
.skip:focus {
  top: 8px;
}
.masthead {
  max-width: 1240px;
  margin: auto;
  padding: 24px 40px;
  display: flex;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 19px;
  font-weight: 750;
  white-space: nowrap;
}
.brand b {
  font-size: 14px;
  font-weight: 500;
  margin-left: 5px;
}
.brand-symbol {
  display: flex;
  align-items: flex-end;
  gap: 3px;
  height: 26px;
}
.brand-symbol i {
  display: block;
  width: 7px;
  background: var(--blue);
  border-radius: 2px;
}
.brand-symbol i:nth-child(1) {
  height: 13px;
}
.brand-symbol i:nth-child(2) {
  height: 25px;
}
.brand-symbol i:nth-child(3) {
  height: 19px;
}
.masthead nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-size: 14px;
}
.masthead a:hover {
  color: var(--blue);
}
.language {
  font-size: 13px;
  border-left: 1px solid var(--line);
  padding-left: 24px;
}
main {
  max-width: 1240px;
  margin: auto;
}
.hero {
  padding: 88px 40px 84px;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 70px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(34px, 4.1vw, 53px);
  line-height: 1.35;
  letter-spacing: -1.5px;
  font-weight: 800;
  max-width: 570px;
}
.lead {
  font-size: 17px;
  line-height: 1.95;
  color: var(--muted);
  margin-top: 26px;
  max-width: 490px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 650;
  min-height: 48px;
  line-height: 1.5;
}
.primary {
  background: var(--blue);
  color: #fff;
}
.primary:hover {
  background: #0c37ab;
}
.text-link {
  font-size: 14px;
}
.hero-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 24px;
}
.project-preview {
  position: relative;
  padding-top: 28px;
}
.request-note {
  background: #eaf0ff;
  border: 1px solid #b9cdfd;
  border-radius: 12px 12px 3px 12px;
  padding: 19px 23px 19px 38px;
  position: relative;
  margin: 0 0 18px 38px;
  font-size: 15px;
}
.note-dot {
  position: absolute;
  left: 17px;
  top: 28px;
  width: 8px;
  height: 8px;
  background: var(--blue);
  border-radius: 50%;
}
.request-note:after {
  content: "";
  position: absolute;
  left: 14px;
  bottom: -19px;
  height: 18px;
  border-left: 2px dashed #b9cdfd;
}
.preview-workspace {
  border: 1px solid #cad7ee;
  border-radius: 12px;
  box-shadow: 0 22px 50px -30px #31558255;
  overflow: hidden;
  background: #fff;
}
.preview-toolbar {
  display: flex;
  gap: 20px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding: 10px 17px;
  background: var(--paper);
  font-size: 12px;
  color: var(--muted);
}
.window-dots {
  color: #b3c1dc;
  font-size: 10px;
  letter-spacing: 2px;
}
.preview-body {
  padding: 22px;
}
.preview-body > p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
}
.sample-table {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 5px;
  overflow: hidden;
}
.sample-table > div {
  padding: 11px 9px;
  border-bottom: 1px solid var(--line);
}
.sample-table > div:nth-child(-n + 3) {
  background: var(--paper);
  font-weight: 600;
}
.sample-table > div:nth-child(n + 4) {
  border: 0;
}
.status-chip {
  font-size: 11px;
  background: #e8f2ef;
  color: #23694b;
  padding: 3px 7px;
  border-radius: 4px;
  white-space: nowrap;
}
.source-delivery {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 22px;
  padding: 15px 0;
  border-top: 1px solid var(--line);
}
.file-icon {
  width: 36px;
  height: 43px;
  background: var(--blue);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: monospace;
  border-radius: 3px 10px 3px 3px;
}
.source-delivery strong {
  font-size: 13px;
  display: block;
}
.source-delivery code {
  font-size: 11px;
  color: var(--muted);
}
.zip-tag {
  margin-left: auto;
  border: 1px solid var(--line);
  font-size: 11px;
  padding: 0 7px;
  border-radius: 4px;
}
.source-tree {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 13px 22px;
  background: var(--paper);
  color: var(--muted);
  font-size: 11px;
}
.source-tree code:before {
  content: "├ ";
  color: #97adcf;
}
figcaption {
  text-align: right;
  font-size: 11px;
  color: var(--muted);
  margin-top: 12px;
}
.section {
  padding: 72px 40px;
  border-top: 1px solid var(--line);
}
h2 {
  font-size: 30px;
  line-height: 1.5;
  letter-spacing: -0.5px;
}
h3 {
  font-size: 19px;
  line-height: 1.6;
}
.section-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: start;
  margin-bottom: 38px;
}
.section-heading > p {
  font-size: 15px;
  color: var(--muted);
  max-width: 520px;
}
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}
.steps li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) minmax(0, 0.72fr);
  gap: 28px;
  align-items: start;
  padding: 28px 0;
  position: relative;
  border-top: 1px solid #e6ecf6;
  counter-increment: step;
}
.steps li:before {
  content: counter(step, decimal-leading-zero);
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--blue);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 16px;
  font-weight: 700;
}
.step-body p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 10px;
}
.step-hint {
  font-size: 13px;
  border-left: 3px solid var(--amber);
  padding-left: 16px;
  margin-top: 6px;
  color: var(--muted);
}
.examples-section {
  background: var(--paper);
  border-radius: 16px;
  border-top: 0;
}
.example-panel {
  max-width: 960px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.example-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--line);
}
.example-tabs button {
  background: none;
  border: 0;
  border-bottom: 3px solid transparent;
  padding: 16px 27px;
  color: var(--muted);
  font-size: 14px;
  min-height: 52px;
}
.example-tabs button[aria-selected="true"] {
  border-bottom-color: var(--blue);
  color: var(--blue);
  font-weight: 700;
  background: #f7f9ff;
}
.example-text {
  margin: 0;
  padding: 28px 32px;
  font-size: 16px;
  line-height: 2.1;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  min-height: 190px;
}
.example-text[hidden] {
  display: none;
}
.copy-row {
  padding: 0 32px 26px;
  display: flex;
  gap: 18px;
  align-items: center;
  font-size: 13px;
  color: var(--muted);
  flex-wrap: wrap;
}
.scope-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 34px;
}
.scope-list {
  padding: 0;
  list-style: none;
  margin: 20px 0 0;
}
.scope-list li {
  display: flex;
  gap: 12px;
  font-size: 14px;
  margin: 14px 0;
}
.yes li:before {
  content: "✓";
  color: var(--blue);
  font-weight: 700;
}
.later li:before {
  content: "—";
  color: #8897ac;
}
.scope-note {
  margin: 26px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--muted);
}
.billing {
  display: flex;
  gap: 25px;
  margin-top: 45px;
  padding: 30px;
  background: #f3f6fc;
  border-radius: 10px;
}
.billing-mark {
  color: var(--blue);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.5;
}
.billing p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
}
.billing .billing-note {
  font-size: 13px;
}
.faq-section {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
}
.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}
.faq-list details:first-child {
  padding-top: 6px;
}
.faq-list summary {
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
.faq-list summary:after {
  content: "+";
  color: var(--blue);
  font-size: 21px;
  line-height: 1;
}
.faq-list details[open] summary:after {
  content: "−";
}
.faq-list summary::-webkit-details-marker {
  display: none;
}
.faq-list p {
  font-size: 14px;
  color: var(--muted);
  margin: 16px 0 5px;
}
.closing {
  margin: 0 40px 50px;
  padding: 38px 40px;
  background: var(--blue);
  border-radius: 12px;
  color: white;
  display: flex;
  gap: 32px;
  justify-content: space-between;
  align-items: center;
}
.closing h2 {
  font-size: 25px;
}
.closing p {
  font-size: 14px;
  margin-top: 10px;
  color: #dce6ff;
}
.light {
  background: white;
  color: var(--blue);
  flex-shrink: 0;
}
.light:hover {
  background: #edf3ff;
}
footer {
  max-width: 1240px;
  margin: auto;
  border-top: 1px solid var(--line);
  padding: 24px 40px 36px;
  display: flex;
  gap: 24px;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}
footer p {
  flex: 1;
}
footer > span {
  font-weight: 700;
  white-space: nowrap;
}
@media (min-width: 1400px) {
  .hero {
    min-height: 650px;
  }
}
@media (max-width: 900px) {
  .hero {
    gap: 35px;
    padding: 60px 28px;
  }
  .masthead {
    padding: 20px 28px;
  }
  .masthead nav {
    gap: 18px;
  }
  .brand b {
    display: none;
  }
  .section {
    padding: 54px 28px;
  }
  .section-heading {
    gap: 30px;
  }
  .hero h1 {
    font-size: 38px;
  }
  .hero-actions {
    gap: 16px;
  }
  .hero-note {
    font-size: 11px;
  }
  .steps li {
    grid-template-columns: 44px 1fr;
    gap: 20px;
  }
  .step-hint {
    grid-column: 2;
    margin-top: 0;
  }
  .faq-section {
    gap: 35px;
  }
  .closing {
    margin: 0 28px 35px;
    padding: 30px;
  }
  .closing h2 {
    font-size: 22px;
  }
}
@media (max-width: 640px) {
  html {
    scroll-padding-top: 20px;
  }
  .masthead {
    padding: 17px 20px;
    gap: 16px;
  }
  .masthead nav {
    display: none;
  }
  .brand b {
    display: inline;
    font-size: 12px;
  }
  .brand {
    font-size: 17px;
  }
  .language {
    margin-left: auto;
    padding-left: 14px;
    font-size: 12px;
  }
  .hero {
    grid-template-columns: 1fr;
    padding: 48px 22px 45px;
    gap: 26px;
  }
  .hero h1 {
    font-size: 38px;
    letter-spacing: -1px;
    max-width: 440px;
  }
  .lead {
    font-size: 15px;
    margin-top: 22px;
  }
  .hero-actions {
    margin-top: 25px;
  }
  .hero-note {
    font-size: 12px;
  }
  .project-preview {
    padding-top: 10px;
  }
  .request-note {
    margin-left: 22px;
  }
  .section {
    padding: 46px 22px;
  }
  h2 {
    font-size: 26px;
  }
  .section-heading {
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 26px;
  }
  .section-heading > p {
    font-size: 14px;
  }
  .steps li {
    gap: 14px;
    padding: 25px 0;
    grid-template-columns: 36px minmax(0, 1fr);
  }
  .steps li:before {
    height: 34px;
    width: 34px;
    font-size: 13px;
  }
  .steps h3 {
    font-size: 17px;
  }
  .step-hint {
    font-size: 12px;
  }
  .examples-section {
    border-radius: 0;
  }
  .example-tabs button {
    padding: 14px 16px;
    font-size: 13px;
    flex: 1;
  }
  .example-text {
    padding: 23px;
    font-size: 14px;
    min-height: 260px;
  }
  .copy-row {
    padding: 0 23px 23px;
    gap: 12px;
  }
  .scope-columns {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .scope-list {
    margin-top: 14px;
  }
  .scope-list li {
    font-size: 14px;
  }
  .billing {
    padding: 24px 20px;
    gap: 15px;
  }
  .billing h3 {
    font-size: 18px;
  }
  .billing-mark {
    font-size: 27px;
  }
  .faq-section {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .closing {
    margin: 0 16px 32px;
    padding: 30px 24px;
    display: block;
  }
  .closing h2 {
    font-size: 25px;
  }
  .closing .button {
    margin-top: 23px;
  }
  footer {
    display: flex;
    flex-wrap: wrap;
    padding: 24px 22px;
    gap: 12px;
  }
  footer p {
    flex-basis: 100%;
    order: 3;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}
.value-section {
  padding-top: 58px;
}
.value-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 35px;
}
.value-columns p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 13px;
}
.value-columns h3 {
  font-size: 18px;
}
.open-source {
  margin-top: 45px;
  padding: 28px 30px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--blue);
  display: flex;
  align-items: center;
  gap: 42px;
  border-radius: 5px;
}
.open-source p {
  font-size: 14px;
  color: var(--muted);
  margin-top: 12px;
  max-width: 780px;
}
.open-source small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 10px;
}
.open-source > a {
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .value-columns {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .open-source {
    padding: 24px;
    display: block;
  }
  .open-source > a {
    display: inline-block;
    margin-top: 20px;
  }
}