:root {
  --paper: #f6f3ec;
  --surface: #fffdf8;
  --ink: #292a25;
  --muted: #66665c;
  --line: #d9d6cc;
  --accent: #8d3930;
  --green: #485b43;
  --serif: Georgia, "Palatino Linotype", "Songti SC", SimSun, serif;
  --sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.65 var(--sans); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
button { font: inherit; cursor: pointer; }
a, button { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
::selection { background: #dfb9a6; color: var(--ink); }
[hidden] { display: none !important; }
.wrap { width: min(1200px, calc(100% - 80px)); margin-inline: auto; }
.skip { position: fixed; left: 20px; top: -100px; z-index: 20; background: var(--surface); padding: 12px 20px; }
.skip:focus { top: 12px; }
.skip:not(:focus) { clip-path: inset(50%); width: 1px; height: 1px; overflow: hidden; }
.header { border-bottom: 1px solid var(--line); }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 92px; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { width: 37px; height: 42px; }
.brand-name { font-family: var(--serif); font-size: 24px; letter-spacing: -.6px; }
.brand-name small { display: block; font: 9px/1 var(--sans); letter-spacing: 3.3px; margin-top: 4px; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 30px; font-size: 13px; }
.nav-links a { text-decoration: none; }
.nav-links a:hover, .text-link:hover { color: var(--accent); }
.language { border-left: 1px solid var(--line); padding-left: 26px; }
.repo-link { border: 1px solid var(--line); padding: 8px 15px; border-radius: 3px; }
.hero { padding: 74px 0 64px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 60px; }
.eyebrow { font-size: 10px; letter-spacing: 2.3px; text-transform: uppercase; font-weight: 650; color: var(--accent); display: flex; gap: 12px; align-items: center; }
.eyebrow::before { content: ""; width: 23px; height: 1px; background: currentColor; }
h1, h2, h3, p { margin-top: 0; }
h1 { font: 400 clamp(46px, 4.75vw, 68px)/1.08 var(--serif); letter-spacing: -2.6px; margin: 24px 0 24px; }
h1 em { color: var(--accent); font-weight: 400; }
.hero-copy > p { color: var(--muted); max-width: 440px; font-size: 16px; line-height: 1.85; margin-bottom: 29px; }
.actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.button { display: inline-flex; gap: 28px; align-items: center; justify-content: center; padding: 13px 21px; background: var(--accent); border: 1px solid var(--accent); border-radius: 3px; color: #fffdf8; text-decoration: none; font-size: 13px; font-weight: 600; transition: background .2s; }
.button:hover { background: #6e2c25; }
.text-link { font-size: 13px; text-decoration: none; }
.hero-note { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--muted); margin-top: 24px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.hero-art { position: relative; margin: 0 0 24px; padding: 12px; border: 1px solid #bdb7a7; background: #e8e2d4; transform: rotate(1.2deg); }
.hero-art > img { width: 100%; height: 414px; object-fit: cover; object-position: 62% center; display: block; filter: saturate(.8); }
.hero-art figcaption { display: flex; justify-content: space-between; font: 9px/1.2 var(--sans); letter-spacing: 1.5px; color: #55534c; margin-top: 12px; }
.note-card { position: absolute; width: 265px; right: 24px; bottom: 49px; background: #fffdf5; padding: 20px 23px; transform: rotate(-4deg); box-shadow: 2px 9px 25px #15150c30; border-top: 3px solid var(--accent); }
.note-card small { font: 9px/1.4 var(--sans); letter-spacing: 1.6px; color: var(--accent); }
.note-card strong { display: block; font: 21px/1.3 var(--serif); margin: 10px 0 13px; }
.note-card span { display: block; border-top: 1px solid #e2dfd4; padding-top: 9px; font-size: 10px; color: #66665c; }
.principles { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); padding: 23px 0; }
.principles > div { display: flex; gap: 14px; align-items: center; justify-content: center; border-right: 1px solid var(--line); }
.principles > div:first-child { justify-content: flex-start; }
.principles > div:last-child { border: 0; }
.principles b { font: 22px var(--serif); color: var(--accent); }
.principles span { font-size: 12px; }
.section { padding: 88px 0; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 36px; }
.section-heading p { max-width: 350px; font-size: 14px; color: var(--muted); margin: 0 0 3px; }
.section-number { font-size: 10px; letter-spacing: 1.6px; color: var(--muted); margin-bottom: 12px; display: block; text-transform: uppercase; }
h2 { font: 400 38px/1.2 var(--serif); letter-spacing: -.9px; margin: 0; }
.workflow-controls { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); border-bottom: 0; }
.step { text-align: left; padding: 18px 20px; background: transparent; color: var(--muted); border: 0; border-right: 1px solid var(--line); transition: background .2s; }
.step:last-child { border: 0; }
.step small { font-size: 10px; display: block; margin-bottom: 6px; opacity: .8; }
.step strong { font-weight: 500; font-size: 14px; }
.step[aria-pressed="true"] { background: var(--ink); color: var(--surface); }
.step:hover:not([aria-pressed="true"]) { background: #eae6dc; }
.workflow-panel { display: grid; grid-template-columns: 1fr 1.05fr; border: 1px solid var(--line); background: var(--surface); min-height: 296px; }
.workflow-explanation { padding: 36px 40px; }
.file-label { font: 11px Consolas, "Courier New", monospace; color: var(--accent); }
.workflow-explanation h3 { font: 30px/1.25 var(--serif); margin: 16px 0; }
.workflow-explanation p { font-size: 14px; color: var(--muted); margin-bottom: 20px; max-width: 390px; }
.sample { padding: 26px 32px; margin: 24px; margin-left: 0; background: #eeeae1; border: 1px solid #dfdace; }
.sample-title { display: flex; justify-content: space-between; gap: 20px; border-bottom: 1px solid #d7d1c4; padding-bottom: 15px; font: 10px Consolas, monospace; color: var(--muted); }
.sample pre { font: 12px/1.9 Consolas, "Courier New", "Microsoft YaHei", monospace; white-space: pre-wrap; overflow-wrap: anywhere; margin: 20px 0 0; }
.loop-note { margin-top: 15px; font-size: 12px; color: var(--muted); text-align: right; }
.why { border-top: 1px solid var(--line); padding-top: 56px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 42px; margin-top: 36px; }
.feature { border-top: 2px solid var(--ink); padding-top: 23px; }
.feature > span { font: italic 26px var(--serif); color: var(--accent); }
.feature h3 { font: 23px/1.3 var(--serif); margin: 17px 0 12px; }
.feature p { font-size: 14px; color: var(--muted); margin: 0; }
.start { background: #eae6dc; border-block: 1px solid var(--line); }
.start-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: start; }
.start-copy > p { margin: 23px 0; color: var(--muted); font-size: 14px; }
.requirements { border-top: 1px solid #cec7b9; padding-top: 20px; font-size: 11px !important; }
.terminal { background: #292b27; color: #e9e7de; border: 1px solid #353a31; border-radius: 4px; min-width: 0; }
.terminal-bar { padding: 13px 20px; border-bottom: 1px solid #46473f; display: flex; justify-content: space-between; align-items: center; font: 11px Consolas, monospace; }
.copy { background: transparent; color: #e9e7de; border: 1px solid #696b60; padding: 4px 11px; border-radius: 3px; font-size: 11px; }
.copy:hover { background: #404239; }
.copy:focus-visible { outline-color: #eed6b5; }
.terminal pre { padding: 25px; margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: 12px/1.85 Consolas, "Courier New", monospace; }
.code-comment { color: #b1b8a7; }
.copy-status { min-height: 22px; font-size: 11px; margin: 8px 0 0; color: var(--muted); }
.docs-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.doc-link { text-decoration: none; padding: 25px 0; border-block: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; gap: 10px; }
.doc-link h3 { font: 21px var(--serif); margin: 0; }
.doc-link p { font-size: 12px; color: var(--muted); grid-column: 1 / -1; margin: 0; }
.doc-link:hover h3, .doc-link:hover > span { color: var(--accent); }
.closing { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding-top: 68px; }
.closing p { font: italic 28px/1.3 var(--serif); margin: 0; }
.footer { border-top: 1px solid var(--line); padding: 24px 0; font-size: 11px; color: var(--muted); }
.footer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.footer-links { display: flex; gap: 22px; }
:lang(zh-CN) h1 { font-size: clamp(42px, 4.2vw, 59px); line-height: 1.35; letter-spacing: -1.5px; }
:lang(zh-CN) h1 em { font-style: normal; }
:lang(zh-CN) h2 { font-size: 33px; line-height: 1.4; }
:lang(zh-CN) .hero-copy > p { line-height: 1.95; }
@media (min-width: 1450px) { .hero { padding-block: 90px; } }
@media (max-width: 1000px) {
  .wrap { width: calc(100% - 48px); }
  .nav-links { gap: 18px; }
  .hero { gap: 32px; padding-top: 52px; }
  .hero-art > img { height: 390px; }
  .workflow-explanation { padding: 28px; }
  .start-grid { gap: 36px; }
  .principles { gap: 12px; }
  .principles > div { gap: 10px; }
}
@media (max-width: 760px) {
  .wrap { width: calc(100% - 40px); }
  .nav { min-height: 80px; gap: 16px; }
  .nav-links { gap: 16px; }
  .nav-links .section-nav, .nav-links .repo-link { display: none; }
  .language { border: 0; padding: 10px 0 10px 10px; }
  .brand-name { font-size: 22px; }
  .hero { grid-template-columns: 1fr; padding: 44px 0 36px; gap: 42px; }
  h1 { font-size: clamp(44px, 9.5vw, 66px); letter-spacing: -1.8px; }
  .hero-copy > p { max-width: 560px; }
  .hero-art { width: calc(100% - 8px); margin: 0 auto 6px; }
  .hero-art > img { height: 330px; }
  .principles { grid-template-columns: 1fr 1fr; gap: 20px 10px; padding: 23px 0; }
  .principles > div, .principles > div:first-child { justify-content: flex-start; border: 0; }
  .principles span { font-size: 11px; }
  .principles b { width: 28px; }
  .section { padding: 58px 0; }
  .section-heading { display: block; margin-bottom: 28px; }
  .section-heading p { margin-top: 18px; max-width: 520px; }
  h2 { font-size: 33px; }
  .step { padding: 14px 8px; text-align: center; }
  .step strong { font-size: 11px; }
  .workflow-panel { grid-template-columns: 1fr; }
  .workflow-explanation { padding: 25px; }
  .sample { margin: 0 20px 20px; padding: 20px; }
  .loop-note { text-align: left; }
  .feature-grid { grid-template-columns: 1fr; gap: 28px; }
  .feature { display: grid; grid-template-columns: 32px 1fr; gap: 6px 15px; }
  .feature h3 { margin: 4px 0 10px; }
  .feature p { grid-column: 2; }
  .start-grid { grid-template-columns: 1fr; gap: 22px; }
  .terminal pre { padding: 20px; font-size: 11px; }
  .docs-grid { grid-template-columns: 1fr; gap: 0; }
  .doc-link + .doc-link { border-top: 0; }
  .closing { align-items: flex-start; flex-direction: column; padding-top: 44px; }
  .footer .wrap { align-items: flex-start; flex-direction: column; gap: 12px; }
  :lang(zh-CN) h1 { font-size: clamp(39px, 8.8vw, 57px); }
  :lang(zh-CN) h2 { font-size: 29px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}