:root {
  --canvas: #f3f0e7;
  --surface: #fdfbf6;
  --ink: #242d27;
  --muted: #60695f;
  --forest: #244f3b;
  --forest-dark: #193e2e;
  --sage: #e3e9dc;
  --line: #d8d9cc;
  --accent: #9b552b;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Songti SC", "SimSun", serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 9rem; }
body { margin: 0; background: var(--canvas); color: var(--ink); font: 1rem/1.7 var(--body); -webkit-font-smoothing: antialiased; }
html[lang="en"] [data-lang="zh-CN"], html[lang="zh-CN"] [data-lang="en"], [hidden] { display: none !important; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
a, button, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
::selection { background: #d4dfc9; color: var(--forest-dark); }
code, pre { font-family: var(--mono); }
p code { font-size: .87em; overflow-wrap: anywhere; }
.container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 20px; padding: 10px 18px; border-radius: 8px; background: var(--forest); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; top: 0; z-index: 10; background: var(--canvas); border-bottom: 1px solid var(--line); }
.header-inner { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 8px 12px; padding-top: 17px; }
.brand { display: inline-flex; align-items: center; gap: 10px; width: fit-content; font-size: 1.5rem; line-height: 1; font-weight: 650; letter-spacing: -.9px; }
.brand-period { color: var(--forest); margin-left: -8px; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; width: 27px; height: 30px; border: 1.5px solid var(--forest); border-radius: 7px 7px 12px 7px; transform: rotate(-7deg); }
.brand-mark span { width: 12px; height: 15px; border: 1.5px solid var(--forest); border-radius: 3px 3px 6px 3px; }
.main-nav { grid-column: 1 / -1; grid-row: 2; display: flex; gap: 24px; min-width: 0; overflow-x: auto; white-space: nowrap; font-size: .81rem; scrollbar-width: thin; }
.main-nav a { padding-block: 12px 14px; }
.main-nav a:hover, .site-footer nav a:hover { color: var(--forest); text-decoration: underline; text-underline-offset: 5px; }
.header-actions { display: flex; align-items: center; gap: 9px; }
.language-toggle, .github-link { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 8px 11px; border-radius: 7px; font-size: .81rem; }
.language-toggle { min-width: 48px; border: 1px solid var(--line); background: transparent; color: var(--ink); }
.language-toggle:hover { border-color: var(--forest); background: var(--sage); }
.github-link { background: var(--forest); color: var(--surface); border: 1px solid var(--forest); }
.github-link:hover { background: var(--forest-dark); }
.hero { display: grid; gap: 34px; padding-block: 50px 36px; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--forest); font-size: .72rem; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; margin-bottom: 20px; }
.status-dot { display: inline-block; flex-shrink: 0; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
h1 { font: 400 clamp(2.8rem, 6vw, 5.15rem)/1.09 var(--display); letter-spacing: -.045em; }
h1 em { color: var(--forest); font-weight: 400; }
html[lang="zh-CN"] h1 { font-size: clamp(2.6rem, 5.3vw, 4.5rem); line-height: 1.3; letter-spacing: -.025em; }
html[lang="zh-CN"] h1 em { font-style: normal; }
.hero-description { max-width: 480px; margin-top: 24px; color: var(--muted); font-size: 1.02rem; line-height: 1.8; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px 24px; margin-top: 29px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 17px; min-height: 50px; padding: 13px 20px; border: 1px solid transparent; border-radius: 8px; font-size: .87rem; font-weight: 600; }
.button-primary { color: var(--surface); background: var(--forest); }
.button-primary:hover { background: var(--forest-dark); }
.button-light { color: var(--forest-dark); background: var(--surface); }
.button-light:hover { background: var(--sage); }
.text-link { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; color: var(--forest); font-size: .86rem; font-weight: 600; }
.text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
.hero-platforms { margin-top: 27px; color: var(--muted); font-size: .72rem; letter-spacing: .04em; }
.hero-platforms > span { margin-inline: 9px; color: #8a9385; }
.vault-illustration { position: relative; isolation: isolate; display: flex; flex-direction: column; justify-content: center; min-height: 365px; padding: 32px 19px 16px; background: var(--sage); border-radius: 22px; overflow: hidden; }
.vault-illustration::before, .vault-illustration::after { position: absolute; z-index: -2; content: ""; width: 420px; height: 420px; border: 1px solid #ccd7c5; border-radius: 50%; left: 42%; top: -65%; }
.vault-illustration::after { width: 470px; height: 470px; left: -70%; top: 65%; }
.vault-sheet { position: absolute; z-index: -1; top: 35px; left: 13%; width: 77%; height: 260px; border: 1px solid #bdccb7; border-radius: 13px; background: #d6dfcc; transform: rotate(-6deg); }
.vault-card { width: min(100%, 365px); margin-inline: auto; border: 1px solid #ced2c3; border-radius: 12px; background: var(--surface); box-shadow: 0 16px 35px -22px #3b513b66; transform: rotate(2deg); }
.vault-card-header { display: flex; align-items: center; gap: 12px; padding: 22px 20px 19px; border-bottom: 1px solid #e8e9df; }
.keyhole { position: relative; width: 37px; height: 42px; border: 1px solid #ccd5c1; border-radius: 9px; background: #ecf0e4; }
.keyhole::before { content: ""; position: absolute; width: 8px; height: 8px; border-radius: 50%; background: var(--forest); top: 11px; left: 14px; }
.keyhole::after { content: ""; position: absolute; width: 4px; height: 9px; background: var(--forest); top: 17px; left: 16px; border-radius: 1px; }
.small-label { color: var(--muted); font-size: .66rem; font-weight: 600; letter-spacing: .05em; }
.vault-card h2 { font: 400 1.7rem/1.3 var(--display); }
.vault-index { margin-left: auto; align-self: flex-start; color: #75806d; font: .75rem var(--mono); }
.vault-contents { list-style: none; padding: 9px 20px; margin: 0; }
.vault-contents li { display: flex; align-items: center; gap: 12px; padding-block: 13px; }
.vault-contents strong { display: block; font-size: .85rem; font-weight: 600; }
.content-caption { display: block; color: var(--muted); font-size: .68rem; }
.content-symbol { display: grid; place-items: center; width: 27px; flex-shrink: 0; font: 1rem var(--display); color: var(--forest); }
.file-symbol::before { content: ""; width: 13px; height: 17px; border: 1px solid var(--forest); border-radius: 2px 5px 2px 2px; background: linear-gradient(var(--forest), var(--forest)) 3px 6px / 7px 1px no-repeat, linear-gradient(var(--forest), var(--forest)) 3px 10px / 7px 1px no-repeat; }
.content-line { margin-left: auto; width: 18px; height: 1px; background: #d9ddce; }
.vault-card-footer { display: flex; align-items: center; gap: 7px; padding: 14px 20px; background: #f0f3e9; border-radius: 0 0 12px 12px; color: var(--forest); font-size: .66rem; }
.footer-line { margin-left: auto; width: 31px; height: 3px; border-radius: 4px; background: #b6c8a9; }
.ownership-note { display: flex; align-items: center; justify-content: center; gap: 10px; color: var(--forest); margin-top: 19px; font: italic 1.04rem var(--display); }
.ownership-note > span:first-child { font-size: 1.35rem; }
.vault-illustration figcaption { margin-top: 18px; text-align: center; color: #5b6853; font-size: .61rem; }
.principles { display: grid; gap: 14px; padding-block: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principles p { display: flex; align-items: center; gap: 14px; font-size: .8rem; }
.principle-number { font: .66rem var(--mono); color: var(--forest); }
.section { padding-block: 66px; }
.section-heading { display: grid; gap: 20px; margin-bottom: 31px; }
.section h2, .closing-section h2 { font: 400 clamp(2rem, 4vw, 3.15rem)/1.15 var(--display); letter-spacing: -.03em; }
html[lang="zh-CN"] .section h2, html[lang="zh-CN"] .closing-section h2 { line-height: 1.35; }
.section-intro { max-width: 440px; color: var(--muted); font-size: .92rem; }
.feature-grid { display: grid; gap: 14px; }
.feature-card { display: flex; flex-direction: column; align-items: flex-start; min-width: 0; padding: 25px; background: var(--surface); border: 1px solid var(--line); border-radius: 13px; }
.feature-vault { background: var(--sage); border-color: #cfd8c4; }
.feature-number { color: var(--forest); font: .74rem var(--mono); margin-bottom: 23px; }
.feature-card h3 { margin-bottom: 13px; font-size: 1.08rem; font-weight: 600; line-height: 1.4; }
.feature-card p { color: var(--muted); font-size: .86rem; line-height: 1.8; margin-bottom: 22px; }
.feature-tag, .feature-link { margin-top: auto; font-size: .7rem; color: var(--forest); }
.feature-tag { padding-top: 4px; }
.feature-link { display: inline-flex; align-items: center; gap: 9px; min-height: 44px; text-decoration: underline; text-underline-offset: 4px; }
.desktop-note { display: grid; gap: 6px; margin-top: 20px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.desktop-note .small-label { color: var(--forest); }
.desktop-note p { color: var(--muted); font-size: .81rem; }
.architecture-section { background: #eaece1; border-block: 1px solid var(--line); }
.architecture-flow { display: grid; }
.architecture-node { min-width: 0; padding: 25px; border: 1px solid #cfd4c4; border-radius: 12px; background: var(--surface); }
.architecture-node h3 { margin-block: 19px 12px; font-size: 1.13rem; font-weight: 600; }
.architecture-node p { font-size: .85rem; color: var(--muted); margin-bottom: 24px; }
.architecture-node code, .node-detail { font-size: .67rem; color: var(--forest); overflow-wrap: anywhere; }
.architecture-core { background: var(--forest); color: var(--surface); border-color: var(--forest); }
.architecture-core .small-label, .architecture-core p, .architecture-core .node-detail { color: #e0e7d9; }
.architecture-optional { background: transparent; border-style: dashed; }
.architecture-optional ul { margin: 0; padding: 0; list-style: none; }
.architecture-optional li { padding-block: 9px; border-top: 1px solid var(--line); }
.architecture-optional li strong { display: block; font-size: .78rem; font-weight: 600; }
.architecture-optional li > span { color: var(--muted); font-size: .75rem; }
.flow-arrow { text-align: center; padding-block: 9px; color: var(--forest); font-size: 1.4rem; transform: rotate(90deg); }
.architecture-caption { margin-top: 21px; color: var(--muted); font-size: .78rem; max-width: 760px; }
.quick-start-steps { list-style: none; margin: 0; padding: 0; }
.quick-step { display: grid; gap: 22px; padding-block: 25px; border-top: 1px solid var(--line); }
.step-number { display: block; font: .7rem var(--mono); color: var(--forest); margin-bottom: 10px; }
.step-copy h3 { margin-bottom: 10px; font-size: 1.03rem; font-weight: 600; }
.step-copy p { color: var(--muted); font-size: .85rem; }
.terminal { min-width: 0; align-self: start; background: #23382d; color: #f2f1e7; border: 1px solid #314c3b; border-radius: 11px; overflow: hidden; }
.terminal-heading { display: flex; justify-content: space-between; gap: 15px; padding: 12px 17px; border-bottom: 1px solid #415646; color: #d0dbc7; font-size: .66rem; }
.terminal-heading > span:last-child { font-family: var(--mono); }
.terminal pre { margin: 0; padding: 20px 17px; overflow-x: auto; font-size: .74rem; line-height: 1.95; scrollbar-width: thin; }
.quick-start-footer { display: grid; gap: 14px; padding-top: 20px; border-top: 1px solid var(--line); }
.quick-start-footer p { color: var(--muted); font-size: .8rem; max-width: 660px; }
.faq-section { display: grid; gap: 32px; border-top: 1px solid var(--line); }
.faq-intro .text-link { margin-top: 21px; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding-block: 20px; cursor: pointer; list-style: none; font-size: .92rem; font-weight: 600; line-height: 1.5; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::marker { content: ""; }
.faq-list summary:hover { color: var(--forest); }
.faq-indicator { flex-shrink: 0; color: var(--forest); font-size: 1.3rem; font-weight: 400; }
.faq-list details[open] .faq-indicator { transform: rotate(45deg); }
.faq-answer { padding-bottom: 23px; }
.faq-answer p { color: var(--muted); font-size: .86rem; line-height: 1.85; }
.faq-answer a, .footer-bottom a { color: var(--forest); text-decoration: underline; text-underline-offset: 3px; }
.closing-section { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 25px; padding: 33px 25px; border-radius: 16px; background: var(--forest); color: var(--surface); }
.closing-section .eyebrow { color: #d0dec3; margin-bottom: 14px; }
.closing-section h2 { font-size: clamp(1.9rem, 3.5vw, 2.8rem); }
.closing-section p:not(.eyebrow) { margin-top: 14px; color: #e0e7d9; font-size: .87rem; }
.closing-section a:focus-visible { outline-color: #e9bd86; }
.site-footer { padding-block: 35px 26px; }
.footer-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 23px; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.footer-brand { font-size: 1.35rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 24px; color: var(--muted); font-size: .78rem; }
.site-footer nav a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 13px; padding-top: 21px; color: var(--muted); font-size: .69rem; }
.noscript-note { margin-top: 20px; font-size: .8rem; color: var(--muted); }

@media (max-width: 359px) {
  .header-inner .brand { gap: 7px; font-size: 1.3rem; }
  .brand-mark { width: 23px; height: 26px; }
}

@media (min-width: 600px) {
  .container { width: min(1160px, calc(100% - 64px)); }
  .hero { padding-top: 65px; gap: 45px; }
  .vault-illustration { padding: 44px 32px 25px; min-height: 410px; }
  .vault-sheet { left: calc(50% - 165px); width: 340px; top: 40px; height: 285px; }
  .principles { grid-template-columns: repeat(3, 1fr); gap: 22px; }
  .principles p { display: block; }
  .principle-number { display: block; margin-bottom: 4px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { padding: 29px; }
  .section { padding-block: 80px; }
  .section-heading { margin-bottom: 38px; }
  .desktop-note { grid-template-columns: 95px 1fr; align-items: baseline; gap: 25px; }
  .quick-step { grid-template-columns: 1fr 1.4fr; gap: 28px; padding-block: 30px; }
  .terminal pre { font-size: .73rem; }
  .closing-section { padding: 42px; }
}

@media (min-width: 900px) {
  html { scroll-padding-top: 6rem; }
  .header-inner { display: flex; justify-content: space-between; gap: 25px; min-height: 85px; padding-block: 16px; }
  .brand { font-size: 1.65rem; }
  .main-nav { gap: 25px; font-size: .8rem; }
  .main-nav a { padding-block: 10px; }
  .header-actions { gap: 13px; }
  .hero { grid-template-columns: 1.12fr 1fr; align-items: center; gap: 55px; padding-block: 82px 69px; }
  .hero .eyebrow { margin-bottom: 24px; }
  .vault-illustration { min-height: 445px; }
  .vault-sheet { top: 62px; }
  .vault-card-header { padding-block: 25px 22px; }
  .vault-contents li { padding-block: 16px; }
  .hero-description { font-size: 1.05rem; }
  .principles { padding-block: 24px; }
  .principles p { display: flex; gap: 17px; font-size: .82rem; }
  .principle-number { margin: 0; }
  .section-heading { grid-template-columns: 1.2fr 1fr; align-items: end; gap: 80px; }
  .section-intro { justify-self: end; padding-bottom: 3px; }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
  .feature-card { padding: 29px; }
  .feature-card p { font-size: .87rem; }
  .architecture-flow { grid-template-columns: 1fr 44px 1fr 44px 1fr; align-items: stretch; }
  .flow-arrow { display: grid; place-items: center; transform: none; }
  .architecture-node { padding: 27px; }
  .quick-step { grid-template-columns: 1fr 1.55fr; gap: 70px; }
  .step-copy { padding-right: 20px; }
  .terminal pre { padding: 23px; font-size: .78rem; }
  .terminal-heading { padding-inline: 23px; }
  .quick-start-footer { display: flex; align-items: start; justify-content: space-between; gap: 50px; }
  .quick-start-footer .text-link { flex-shrink: 0; }
  .faq-section { grid-template-columns: 1fr 1.55fr; gap: 70px; }
  .closing-section { padding: 48px; }
  .site-footer { padding-top: 49px; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
  .button, .language-toggle, .github-link { transition: background-color 160ms ease, border-color 160ms ease; }
  .faq-indicator { transition: transform 160ms ease; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}


/* Download */
.download-card {
  display: grid;
  gap: 1.5rem;
  padding: 1.5rem 1.75rem;
  border: 1px solid color-mix(in srgb, currentColor 12%, transparent);
  border-radius: 1.25rem;
  background: color-mix(in srgb, #fff 72%, transparent);
}
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.25rem;
  align-items: center;
}
.download-hash {
  font-size: 0.85rem;
  word-break: break-all;
  opacity: 0.85;
}
.button-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1.1rem;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, currentColor 18%, transparent);
  background: transparent;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
}
.button-secondary:hover {
  background: color-mix(in srgb, currentColor 6%, transparent);
}