:root {
  --paper: #fafaf8;
  --surface: #fff;
  --subtle: #f3f6f5;
  --ink: #202b2b;
  --muted: #536362;
  --line: #dce4e1;
  --accent: #205e75;
  --accent-dark: #17495c;
  --mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 100px; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 16px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-underline-offset: 3px; }
button { font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { letter-spacing: -.035em; line-height: 1.2; }
h1 { font-size: clamp(2.7rem, 5.1vw, 4.25rem); font-weight: 740; }
h2 { font-size: clamp(1.9rem, 3.2vw, 2.7rem); font-weight: 710; }
h3 { font-size: 1.17rem; font-weight: 700; }
p { margin-bottom: 1rem; }
code, pre { font-family: var(--mono); }
code { color: var(--accent-dark); font-size: .87em; overflow-wrap: anywhere; }
pre { margin: 0; overflow: auto; white-space: pre; font-size: .87rem; line-height: 1.65; tab-size: 2; }
pre code { color: inherit; font-size: inherit; overflow-wrap: normal; }
img, svg { max-width: 100%; }
.nowrap { white-space: nowrap; }
.container { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 8px 14px; color: white; background: var(--ink); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.section-pad { padding: clamp(76px, 8vw, 116px) 0; }
.section-pad-sm { padding: 70px 0; }
.section-kicker, .eyebrow { margin-bottom: 18px; color: var(--accent); font-size: .8rem; font-weight: 740; letter-spacing: .08em; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 35px; }
.section-heading h2 { margin-bottom: 12px; }
.section-heading p { max-width: 710px; margin-bottom: 0; color: var(--muted); }
.section-index, .version-badge { color: var(--muted); font-size: .85rem; white-space: nowrap; }
.inline-link, .text-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 13px; font-weight: 650; text-decoration: none; }
.inline-link:hover, .text-link:hover { text-decoration: underline; }

.site-header { position: sticky; z-index: 40; top: 0; border-bottom: 1px solid var(--line); background: rgba(250,250,248,.97); }
.nav-wrap { display: flex; align-items: center; min-height: 74px; gap: 26px; }
.brand { display: inline-flex; flex-shrink: 0; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; }
.brand-mark { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 6px; color: #fff; background: var(--accent); font: 700 .79rem var(--mono); }
.brand-copy { display: grid; line-height: 1.2; }
.brand-copy strong { font-size: .94rem; }
.brand-copy small { margin-top: 2px; color: var(--muted); font-size: .68rem; }
.main-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 19px; margin-left: auto; }
.main-nav a { color: var(--muted); font-size: .84rem; font-weight: 620; text-decoration: none; }
.main-nav a:hover, .main-nav a.is-active { color: var(--accent); }
.nav-cta { flex-shrink: 0; padding: 9px 15px; border: 1px solid var(--accent); border-radius: 6px; color: var(--accent); font-size: .84rem; font-weight: 700; text-decoration: none; }
.nav-cta:hover { background: var(--subtle); }
.menu-toggle { display: none; padding: 7px 11px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: white; }

.hero { display: flex; align-items: center; min-height: min(730px, 87vh); border-bottom: 1px solid var(--line); text-align: center; }
.hero-content { max-width: 890px; }
.hero h1 { margin: 0 auto 27px; text-wrap: balance; }
.hero-lead { max-width: 710px; margin: 0 auto 28px; color: var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); line-height: 1.8; }
.hero-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 10px 21px; border: 1px solid var(--accent); border-radius: 7px; font-size: .92rem; font-weight: 700; text-decoration: none; }
.button-primary { color: #fff; background: var(--accent); }
.button-primary:hover { background: var(--accent-dark); }
.button-ghost { color: var(--accent); background: transparent; }
.button-ghost:hover { background: var(--subtle); }
.hero-note { margin: 20px auto 0; color: var(--muted); font-size: .83rem; }

.story-section, .scenarios-section, .install-intro, .platform-section, .library-section, .integration-section, .maintenance-section, .faq-section { background: var(--surface); }
.story-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 7vw, 105px); align-items: start; }
.story-grid h2 { max-width: 460px; }
.story-grid p { max-width: 610px; color: var(--muted); }
.story-grid .large-copy { color: var(--ink); font-size: 1.22rem; line-height: 1.7; }
.library-flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin: 62px 0 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.library-flow > div { display: grid; align-content: start; min-width: 0; gap: 4px; padding: 20px 24px 21px 0; }
.library-flow > div + div { padding-left: 24px; border-left: 1px solid var(--line); }
.library-flow span { color: var(--accent); font-size: .75rem; font-weight: 720; letter-spacing: .06em; }
.library-flow strong { font-size: 1.09rem; }
.library-flow small, .library-flow figcaption { color: var(--muted); font-size: .78rem; }
.library-flow figcaption { grid-column: 1 / -1; padding: 0 0 12px; }
.product-section h2, .scenarios-section h2 { max-width: 690px; margin-bottom: 42px; }
.product-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-bottom: 26px; }
.product-grid article { padding-top: 22px; border-top: 2px solid var(--accent); }
.product-grid p, .scenario-list p { color: var(--muted); }
.scenario-list { border-top: 1px solid var(--line); }
.scenario-list article { display: grid; grid-template-columns: 230px minmax(0, 1fr) 160px; align-items: start; gap: 30px; padding: 23px 0; border-bottom: 1px solid var(--line); }
.scenario-list h3, .scenario-list p { margin: 0; }
.scenario-list a { font-size: .9rem; font-weight: 650; text-decoration: none; }
.scenario-list a:hover { text-decoration: underline; }

.download-section, .install-section, .service-section, .usage-section, .network-section, .troubleshooting-section { border-top: 1px solid var(--line); }
.choice-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 34px; border-top: 1px solid var(--line); }
.choice-list article { padding: 24px 0; border-bottom: 1px solid var(--line); }
.choice-list article p { max-width: 470px; margin-bottom: 7px; color: var(--muted); }
.choice-list article a { font-size: .89rem; font-weight: 650; text-decoration: none; }
.asset-heading { margin: 68px 0 24px; scroll-margin-top: 96px; }
.asset-heading p { max-width: 720px; color: var(--muted); }
.download-layout { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 26px; align-items: start; }
.download-table-wrap { min-width: 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.download-table { width: 100%; min-width: 740px; border-collapse: collapse; font-size: .85rem; text-align: left; }
.download-table th, .download-table td { padding: 13px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.download-table tr:last-child td { border-bottom: 0; }
.download-table tr:target { background: #e9f2f3; }
.download-table tr[id] { scroll-margin-top: 105px; }
.download-table th { color: var(--muted); background: var(--subtle); font-size: .78rem; }
.download-table td small { display: block; color: var(--muted); }
.platform-dot { display: none; }
.hash-button { max-width: 155px; padding: 0; border: 0; color: var(--accent); background: none; font: .79rem var(--mono); text-align: left; }
.table-download { font-weight: 700; white-space: nowrap; }
.download-aside { padding: 19px; border: 1px solid var(--line); border-radius: 7px; background: white; font-size: .84rem; }
.download-aside h3 { margin: 9px 0; }
.download-aside p { margin-bottom: 10px; }
.download-aside .aside-small { color: var(--muted); }
.aside-label, .source-title, .detail-label, .db-label, .usage-number, .checklist-kicker, .label { color: var(--accent); font-size: .76rem; font-weight: 700; letter-spacing: .04em; }
.aside-rule { height: 1px; margin: 18px 0; background: var(--line); }
.checksum-details { margin-top: 24px; }
.checksum-details dl { margin: 15px 0 0; }
.checksum-details dt { margin-top: 14px; font-weight: 650; }
.checksum-details dd { margin: 0; overflow-wrap: anywhere; }
.checksum-details dd code { font-size: .8rem; }
.verify-panel { display: grid; grid-template-columns: 1fr auto; gap: 12px 20px; margin-top: 28px; padding: 20px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.verify-panel > .code-panel, .verify-instruction { grid-column: 1 / -1; }
.verify-instruction { margin-bottom: 0; color: var(--muted); font-size: .9rem; }
.code-tabs, .platform-tab-head { display: flex; flex-wrap: wrap; gap: 6px; }
.code-tab, .platform-tab { padding: 7px 11px; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); background: var(--surface); font-size: .87rem; }
.code-tab.is-active, .platform-tab.is-active { border-color: var(--accent); color: var(--accent); background: var(--subtle); }
.js .is-hidden { display: none !important; }
.code-panel { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-width: 0; padding: 12px; border: 1px solid var(--line); border-radius: 5px; background: var(--subtle); }
.code-panel code { min-width: 0; overflow-wrap: anywhere; }
.js .code-tabs, .js .platform-tab-head { display: flex; }
.code-tabs, .platform-tab-head { display: none; }

.install-intro p:not(.section-kicker) { max-width: 760px; color: var(--muted); }
.install-intro .intro-lead { max-width: 760px; color: var(--ink); font-size: 1.08rem; }
.quickstart-list { display: grid; gap: 0; max-width: 870px; margin: 28px 0 0; padding-left: 24px; }
.quickstart-list li { padding: 18px 0 18px 9px; border-top: 1px solid var(--line); line-height: 1.75; }
.quickstart-list li::marker { color: var(--accent); font-weight: 700; }
.quickstart-list strong { color: var(--ink); }
.help-search { display: none; max-width: 870px; margin-top: 49px; padding: 26px; border: 1px solid var(--line); border-radius: 8px; background: var(--subtle); }
.js .help-search { display: block; }
.help-search h3 { margin-bottom: 7px; }
.help-search p { margin-bottom: 17px; font-size: .9rem; }
.help-search label { display: block; margin-bottom: 6px; font-size: .82rem; font-weight: 700; }
.search-input-row { display: flex; gap: 9px; }
.search-input-row input { flex: 1; min-width: 0; min-height: 45px; padding: 8px 12px; border: 1px solid #9badac; border-radius: 5px; background: white; color: var(--ink); font: inherit; }
.search-input-row button { padding: 8px 17px; border: 1px solid var(--accent); border-radius: 5px; background: var(--accent); color: white; font-weight: 700; }
.search-results:not(:empty) { margin-top: 14px; }
.search-results ul { margin: 0; padding: 0; list-style: none; }
.search-results li { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 5px 18px; padding: 10px 0; border-top: 1px solid var(--line); }
.search-results li a { font-weight: 650; text-decoration: none; }
.search-results li a:hover { text-decoration: underline; }
.search-results li span { color: var(--muted); font-size: .78rem; }
.guide-links { display: flex; flex-wrap: wrap; gap: 11px 24px; margin-top: 23px; }
.guide-links a { font-weight: 650; text-decoration: none; }
.guide-links a:hover { text-decoration: underline; }
.docker-grid, .platform-grid, .network-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 35px; align-items: start; }
.platform-grid { grid-template-columns: minmax(0, .4fr) minmax(0, .6fr); }
.platform-copy > p, .network-copy > p { color: var(--muted); }
.platform-tabs, .guide-notes > div, .folder-card, .db-card, .usage-card, .feature-card, .reader-detail-card, .conversion-card, .maintenance-card, .checklist-card { min-width: 0; padding: 22px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.platform-tabs { padding: 17px; }
.platform-panel { padding: 19px 4px 2px; }
.platform-panel p, .panel-note { color: var(--muted); font-size: .92rem; }
.platform-panel ol { padding-left: 23px; }
.platform-panel pre, .guide-notes pre, .folder-card pre { margin: 16px 0; padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: var(--subtle); }
.guide-notes, .library-grid, .reader-detail-grid, .conversion-grid, .maintenance-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.maintenance-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.guide-notes > div { background: var(--surface); }
.code-card { min-width: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); }
.code-card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: .84rem; font-weight: 650; }
.window-dot { display: none; }
.code-card pre { padding: 19px; }
.command-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 27px 0; }
.command-grid > div { min-width: 0; }
.command-grid p { min-height: 80px; color: var(--muted); font-size: .9rem; }
.copy-code { flex-shrink: 0; padding: 5px 10px; border: 1px solid var(--line); border-radius: 5px; color: var(--accent); background: white; font-size: .78rem; font-weight: 650; }
.copy-code:hover { border-color: var(--accent); }
.step-list { border-top: 1px solid var(--line); }
.step-item { display: flex; gap: 16px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.step-item > span { color: var(--accent); font-size: .79rem; font-weight: 700; }
.step-item h3 { margin-bottom: 7px; font-size: 1rem; }
.step-item p { margin-bottom: 0; color: var(--muted); font-size: .89rem; }
.callout, .section-note, .detail-note { margin-top: 23px; padding: 15px 18px; border-left: 3px solid var(--accent); background: var(--subtle); color: var(--muted); font-size: .9rem; }
.callout strong { margin-right: 12px; color: var(--ink); }
.service-command { margin-top: 20px; }
.folder-card pre { padding: 0; border: 0; background: none; }
.library-grid { margin-bottom: 18px; }
.db-cards, .usage-grid, .feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 17px; }
.db-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.db-card p, .usage-card p, .feature-card p, .reader-detail-card p, .conversion-card p, .maintenance-card p { color: var(--muted); font-size: .93rem; }
.usage-card-wide { grid-column: span 2; }
.usage-grid, .feature-grid { margin: 24px 0; }
.usage-number, .feature-number, .folder-icon { display: none; }
.usage-card h3, .feature-card h3 { margin: 0 0 12px; }
.plain-list, .action-list { padding-left: 21px; }
.plain-list li, .action-list li { margin: 8px 0; }
.reader-detail-grid, .conversion-grid { margin-top: 18px; }
.mini-code { max-width: 100%; margin: 13px 0; padding: 12px 15px; overflow-x: auto; border: 1px solid var(--line); border-radius: 5px; background: var(--subtle); color: var(--ink); font: .82rem/1.65 var(--mono); white-space: pre; }
.network-list { display: grid; gap: 8px; margin-top: 18px; color: var(--muted); font-size: .92rem; }
.network-tips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); grid-column: 1 / -1; gap: 18px; }
.network-tips > div { padding: 18px; border-top: 1px solid var(--line); }
.network-tips p { margin: 7px 0 0; color: var(--muted); font-size: .92rem; }
.network-steps { grid-column: 1 / -1; max-width: 860px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); }

details { min-width: 0; }
details summary { cursor: pointer; font-weight: 650; }
.inline-details, .checksum-details { padding: 16px 0; border-bottom: 1px solid var(--line); }
.advanced-details { margin-top: 25px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.advanced-details > summary { padding: 17px 0; color: var(--accent); }
.advanced-details[open] > summary { margin-bottom: 19px; }
.trouble-list, .faq-list { border-top: 1px solid var(--line); }
.trouble-list details, .faq-list details { border-bottom: 1px solid var(--line); }
.trouble-list summary, .faq-list summary { padding: 17px 0; list-style: none; }
.trouble-list summary::-webkit-details-marker, .faq-list summary::-webkit-details-marker { display: none; }
.trouble-list summary b, .faq-list summary b { float: right; color: var(--accent); font-weight: 400; }
.trouble-list details[open] summary b, .faq-list details[open] summary b { transform: rotate(45deg); }
.trouble-status { display: none; }
.detail-body { max-width: 800px; padding: 0 0 18px; color: var(--muted); font-size: .94rem; }
.detail-body pre { max-width: 100%; margin: 14px 0; padding: 14px 16px; border: 1px solid var(--line); border-radius: 5px; background: var(--surface); color: var(--ink); }
.detail-body > code { display: block; width: fit-content; max-width: 100%; padding: 11px; overflow-x: auto; background: var(--subtle); white-space: nowrap; }
.faq-grid, .footer-info-grid { display: grid; grid-template-columns: minmax(230px, .75fr) minmax(0, 1.25fr); gap: 75px; }
.faq-quote { padding-left: 18px; border-left: 2px solid var(--line); color: var(--muted); }
.source-links { display: grid; align-content: start; gap: 13px; }
.source-links a { padding-bottom: 10px; border-bottom: 1px solid var(--line); text-decoration: none; }
.footer-info { border-top: 1px solid var(--line); }
.site-footer { padding: 26px 0; border-top: 1px solid var(--line); }
.footer-wrap { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; }
.footer-wrap p { margin: 0; color: var(--muted); font-size: .8rem; }
.back-top { margin-left: auto; font-size: .84rem; text-decoration: none; }
.toast { position: fixed; z-index: 50; right: 18px; bottom: 18px; padding: 9px 14px; border-radius: 6px; color: white; background: var(--ink); opacity: 0; pointer-events: none; transition: opacity .15s; }
.toast.show { opacity: 1; }

@media (max-width: 1050px) {
  .nav-wrap { gap: 17px; }
  .main-nav { gap: 11px; }
  .main-nav a { font-size: .78rem; }
  .download-layout, .docker-grid, .network-grid, .platform-grid { grid-template-columns: 1fr; }
  .download-aside { max-width: 650px; }
  .scenario-list article { grid-template-columns: 190px minmax(0, 1fr); }
  .scenario-list a { grid-column: 2; }
}
@media (max-width: 760px) {
  .container { width: min(100% - 36px, 640px); }
  .nav-wrap { justify-content: space-between; flex-wrap: wrap; gap: 10px; padding: 12px 0; }
  .nav-cta { display: none; }
  .main-nav { order: 3; width: 100%; margin: 0; padding: 9px 0; border-top: 1px solid var(--line); }
  .js .menu-toggle { display: inline-flex; }
  .js .main-nav { display: none; }
  .js .main-nav.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  .js .main-nav a { padding: 9px 0; font-size: .94rem; }
  .hero { min-height: 0; padding: 92px 0 90px; }
  .hero h1 br, .story-grid h2 br, .product-section h2 br { display: none; }
  .story-grid, .product-grid, .choice-list, .library-grid, .db-cards, .usage-grid, .feature-grid, .reader-detail-grid, .conversion-grid, .maintenance-grid, .faq-grid, .footer-info-grid, .network-tips, .command-grid { grid-template-columns: 1fr; }
  .library-flow { grid-template-columns: 1fr; margin-top: 35px; }
  .library-flow > div, .library-flow > div + div { padding: 14px 0; border-left: 0; border-top: 1px solid var(--line); }
  .library-flow > div:first-child { border-top: 0; }
  .command-grid p { min-height: 0; }
  .scenario-list article { display: block; }
  .scenario-list h3, .scenario-list p { margin-bottom: 12px; }
  .scenario-list a { display: inline-block; }
  .usage-card-wide { grid-column: auto; }
  .section-heading { display: block; }
  .section-index, .version-badge { display: none; }
  .verify-panel { display: block; }
  .code-tabs { margin: 12px 0; }
  .code-panel { flex-wrap: wrap; margin-top: 8px; }
  .section-pad-sm { padding: 58px 0; }
  .help-search { padding: 17px; }
}
@media (max-width: 390px) {
  .container { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(2.15rem, 10vw, 2.7rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .code-card-head { align-items: start; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .toast { transition: none; }
}