:root {
    --bg: #F6EDE4;
    --deep-bg: #E8D8C8;
    --paper: #FFF8F2;
    --soft: #F0E4D6;
    --ink: #1A1612;
    --text: #2A241C;
    --muted: #5A5048;
    --light-muted: #7A7068;
    --orange: #E07030;
    --copper: #B06030;
    --line: rgba(26,22,18,0.12);
    --accent-line: rgba(224,112,48,0.50);
    --shadow: 0 12px 28px rgba(26,22,18,0.10);
    --max: 960px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.7 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; overflow-x: hidden; }
body.is-locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; }
img { max-width: 100%; display: block; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 1000; background: var(--ink); color: var(--paper); padding: 8px 12px; }
.skip-link:focus { top: 8px; }
.top-strip { position: fixed; inset: 0 0 auto 0; height: 20px; z-index: 120; background: var(--ink); color: var(--paper); font-size: 12px; }
.top-strip-inner, .site-header-inner, .quick-nav-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.text-button { border: 0; background: transparent; color: var(--paper); padding: 0 4px; cursor: pointer; }
.site-header { position: fixed; top: 20px; left: 0; right: 0; height: 54px; z-index: 119; background: var(--paper); border-bottom: 1px solid var(--accent-line); }
.brand-link { min-width: 44px; height: 44px; display: inline-flex; align-items: center; }
.brand-logo, .menu-logo, .footer-logo { height: 24px; width: auto; max-width: 130px; object-fit: contain; object-position: center; }
.brand-fallback, .menu-logo-fallback { font-size: 16px; font-weight: 800; color: var(--ink); }
.header-actions { display: flex; gap: 8px; align-items: center; }
.header-app, .menu-button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; border-radius: 4px; font-size: 14px; cursor: pointer; }
.header-app { border: 1px solid var(--orange); background: var(--paper); color: var(--ink); }
.menu-button { border: 1px solid var(--ink); background: var(--ink); color: var(--paper); }
.quick-nav { position: fixed; top: 74px; left: 0; right: 0; height: 46px; z-index: 110; background: var(--paper); border-bottom: 1px solid var(--line); }
.quick-nav-inner { justify-content: flex-start; gap: 26px; }
.quick-item { min-height: 44px; display: inline-flex; align-items: center; gap: 8px; font-size: 13px; }
.quick-square { width: 18px; height: 18px; border: 1px solid var(--ink); border-radius: 2px; display: inline-block; background: transparent; }
.quick-item.is-current .quick-square { background: var(--orange); border-color: var(--orange); }
.site-main { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; padding: 150px 0 70px; min-height: 70vh; }
h1,h2,h3 { color: var(--ink); margin-top: 0; }
h1 { font-size: 24px; line-height: 1.3; margin-bottom: 14px; }
h2 { font-size: 20px; line-height: 1.4; margin-bottom: 12px; }
h3 { font-size: 16px; line-height: 1.5; margin-bottom: 8px; }
p { margin: 0 0 14px; }
.eyebrow { display: inline-block; font-size: 12px; letter-spacing: .08em; color: var(--copper); margin-bottom: 9px; }
.lead { font-size: 16px; color: var(--muted); max-width: 760px; }
.section { margin: 0 0 38px; }
.section + .section { padding-top: 4px; }
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; box-shadow: var(--shadow); }
.soft-panel { background: var(--soft); border: 1px solid var(--line); border-radius: 4px; }
.dark-panel { background: var(--ink); color: var(--paper); border-radius: 4px; }
.dark-panel h2, .dark-panel h3 { color: var(--paper); }
.orange-panel { background: var(--orange); color: var(--paper); border-radius: 4px; }
.orange-panel h2, .orange-panel h3 { color: var(--paper); }
.primary-button, .secondary-button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; padding: 0 18px; border-radius: 4px; font-size: 14px; white-space: nowrap; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.primary-button { background: linear-gradient(135deg,#1A1612 0%,#E07030 100%); color: var(--paper); }
.secondary-button { background: var(--paper); color: var(--ink); border: 1px solid var(--orange); }
.primary-button:hover, .secondary-button:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(26,22,18,.12); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(224,112,48,.35); outline-offset: 2px; }
.image-slot { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; margin: 0; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.image-slot img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.image-slot.is-empty { background: linear-gradient(135deg,var(--soft),var(--paper)); }
.hero-indexes { display: flex; gap: 8px; margin-bottom: 18px; flex-wrap: wrap; }
.hero-indexes span { background: var(--orange); color: var(--paper); padding: 7px 10px; border-radius: 3px; font-size: 13px; }
.home-intro { padding: 8px 0 4px; }
.home-intro .lead { max-width: 760px; }
.slant-row { display: grid; grid-template-columns: minmax(220px,300px) 1fr; gap: 26px; align-items: center; }
.slant-media { height: 176px; transform: skewX(-4deg); overflow: hidden; }
.slant-media > * { transform: skewX(4deg); }
.slant-text { padding: 18px 0; }
.dual-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.dual-card { padding: 20px; }
.dual-card .image-slot { height: 160px; margin-bottom: 15px; }
.scroll-pages { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
.scroll-page { min-height: 240px; padding: 22px; position: relative; }
.scroll-page::after { content: ""; position: absolute; top: 0; bottom: 0; width: 7px; background: rgba(224,112,48,.14); }
.scroll-page:first-child::after { right: 0; }
.scroll-page:last-child::after { left: 0; }
.scroll-page .image-slot { height: 145px; margin-bottom: 14px; }
.center-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.center-card { padding: 24px; text-align: center; }
.center-card .image-slot { height: 155px; margin-bottom: 14px; }
.period-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.period-item { padding: 18px; border-top: 3px solid var(--orange); background: var(--paper); }
.period-item .image-slot { height: 130px; margin-bottom: 12px; }
.status-list { display: grid; gap: 10px; }
.status-row { display: grid; grid-template-columns: 120px 1fr auto; gap: 14px; align-items: center; padding: 14px 16px; background: var(--paper); border: 1px solid var(--line); }
.status-pill { padding: 3px 9px; background: var(--ink); color: var(--paper); border-radius: 999px; font-size: 12px; }
.app-split { display: grid; grid-template-columns: minmax(220px,320px) 1fr; gap: 28px; align-items: center; }
.app-visual { height: 320px; position: relative; }
.app-icon { width: 48px; height: 48px; margin-bottom: 14px; }
.text-list { display: grid; gap: 12px; }
.text-list article { padding: 18px 20px; background: var(--paper); border: 1px solid var(--line); }
.faq-mini { display: grid; gap: 10px; }
.faq-mini details, .faq-list details { background: var(--paper); border: 1px solid var(--line); border-radius: 4px; padding: 14px 16px; }
.faq-mini summary, .faq-list summary { cursor: pointer; font-weight: 700; color: var(--ink); }
.faq-mini details p, .faq-list details p { margin: 10px 0 0; }
.page-head { margin-bottom: 30px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }
.page-head .lead { max-width: 800px; }
.inner-dual { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.inner-dual article { padding: 20px; }
.inner-dual .image-slot { height: 200px; margin-bottom: 16px; }
.slant-list { display: grid; gap: 16px; }
.slant-entry { display: grid; grid-template-columns: 180px 1fr; gap: 20px; align-items: stretch; background: var(--paper); border: 1px solid var(--line); }
.slant-entry:nth-child(even) { grid-template-columns: 1fr 180px; }
.slant-entry:nth-child(even) .slant-copy { order: 1; }
.slant-entry:nth-child(even) .slant-mark { order: 2; }
.slant-mark { background: var(--orange); color: var(--paper); padding: 20px; display: flex; align-items: flex-end; font-weight: 800; clip-path: polygon(0 0,100% 0,88% 100%,0 100%); }
.slant-entry:nth-child(even) .slant-mark { clip-path: polygon(12% 0,100% 0,100% 100%,0 100%); }
.slant-copy { padding: 18px 20px; }
.volume-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.volume-sheet { padding: 24px; min-height: 240px; background: var(--paper); border: 1px solid var(--line); position: relative; }
.volume-sheet:nth-child(2n) { transform: translateY(14px); }
.volume-sheet .image-slot { height: 180px; margin-bottom: 14px; }
.single-flow { max-width: 760px; margin: 0 auto; }
.single-step { margin-bottom: 18px; padding: 20px 22px; background: var(--paper); border-left: 4px solid var(--orange); }
.checklist { display: grid; gap: 14px; }
.check-item { display: grid; grid-template-columns: 58px 1fr; gap: 16px; padding: 18px; background: var(--paper); border: 1px solid var(--line); }
.check-no { width: 44px; height: 44px; background: var(--ink); color: var(--paper); display: grid; place-items: center; font-weight: 800; border-radius: 4px; }
.method-columns { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; align-items: start; }
.method-main, .method-side { padding: 22px; }
.topic-list { display: grid; gap: 12px; }
.topic-row { display: grid; grid-template-columns: 160px 1fr; background: var(--paper); border: 1px solid var(--line); }
.topic-name { padding: 18px; background: var(--deep-bg); color: var(--ink); font-weight: 800; }
.topic-copy { padding: 18px; }
.center-stack { max-width: 760px; margin: 0 auto; display: grid; gap: 16px; }
.center-stack article { padding: 24px; text-align: center; }
.app-feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.app-feature-list article { padding: 18px; background: var(--paper); border: 1px solid var(--line); }
.term-sections { display: grid; gap: 16px; }
.term-sections section { padding: 20px 22px; background: var(--paper); border: 1px solid var(--line); }
.term-sections section:nth-child(even) { background: var(--soft); }
.help-steps { counter-reset: help; display: grid; gap: 14px; }
.help-step { counter-increment: help; padding: 20px 22px 20px 74px; background: var(--paper); border: 1px solid var(--line); position: relative; }
.help-step::before { content: counter(help, decimal-leading-zero); position: absolute; left: 20px; top: 18px; font-size: 20px; font-weight: 900; color: var(--orange); }
.contact-lanes { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.contact-lane { padding: 22px; background: var(--paper); border-top: 4px solid var(--orange); }
.about-banner { height: 200px; margin-bottom: 24px; }
.about-manifesto { display: grid; grid-template-columns: .8fr 1.2fr; gap: 18px; align-items: stretch; }
.about-stamp { padding: 24px; background: var(--orange); color: var(--paper); display: flex; align-items: flex-end; }
.about-stamp h2 { color: var(--paper); }
.about-copy { padding: 24px; background: var(--paper); border: 1px solid var(--line); }
.site-footer { background: var(--ink); color: var(--bg); border-top: 1px solid var(--orange); padding: 38px 0 74px; font-size: 13px; }
.footer-inner { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.footer-brand > div { display: flex; flex-direction: column; line-height: 1.2; }
.footer-brand strong { font-size: 16px; }
.footer-brand span { font-size: 11px; color: #d8cabc; }
.footer-logo-link { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; }
.footer-brand-text { font-size: 18px; font-weight: 800; color: var(--paper); }
.footer-links { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; margin-bottom: 24px; }
.footer-links h2 { color: var(--paper); font-size: 13px; margin-bottom: 8px; }
.footer-links a { display: block; color: var(--bg); padding: 3px 0; }
.footer-note { color: #d8cabc; max-width: 780px; }
.copyright { color: #b8aa9b; margin-bottom: 0; }
.overlay { position: fixed; inset: 0; background: rgba(26,22,18,.44); z-index: 200; opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.overlay.is-visible { opacity: 1; visibility: visible; pointer-events: auto; }
.menu-panel { position: fixed; top: 28px; left: 50%; width: 320px; max-height: 360px; transform: translate(-50%,-18px); z-index: 230; background: var(--paper); color: var(--text); border: 1px solid var(--accent-line); border-radius: 5px; box-shadow: var(--shadow); opacity: 0; visibility: hidden; pointer-events: none; transition: .2s ease; overflow: hidden; }
.menu-panel.is-open { transform: translate(-50%,0); opacity: 1; visibility: visible; pointer-events: auto; }
.menu-head { height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 0 12px 0 16px; border-bottom: 1px solid var(--line); }
.menu-brand { display: flex; align-items: center; gap: 8px; }
.icon-close, .search-head button { min-height: 44px; border: 0; background: transparent; cursor: pointer; font-size: 13px; }
.menu-scroll { max-height: 307px; overflow-y: auto; padding: 10px 12px 16px; }
.menu-group { border-bottom: 1px solid var(--line); padding: 8px 0; }
.menu-group:last-child { border-bottom: 0; }
.menu-group h2 { font-size: 12px; color: var(--orange); margin: 0 0 4px; }
.menu-group a { display: block; padding: 6px 4px; }
.menu-group a span { display: block; font-weight: 700; font-size: 13px; }
.menu-group a small { display: block; color: var(--muted); font-size: 11px; line-height: 1.45; }
.search-panel { position: fixed; top: 74px; left: 50%; width: min(620px,calc(100% - 32px)); transform: translate(-50%,-12px); z-index: 225; background: var(--paper); border: 1px solid var(--accent-line); box-shadow: var(--shadow); border-radius: 4px; opacity: 0; visibility: hidden; pointer-events: none; transition: .2s ease; }
.search-panel.is-open { transform: translate(-50%,0); opacity: 1; visibility: visible; pointer-events: auto; }
.search-card { padding: 16px; }
.search-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.search-card label { display: block; margin-bottom: 8px; color: var(--muted); }
.search-card input { width: 100%; height: 44px; border: 1px solid var(--line); border-radius: 4px; background: var(--bg); color: var(--ink); padding: 0 12px; }
.search-results { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.search-results a { min-height: 44px; display: inline-flex; align-items: center; padding: 0 12px; border: 1px solid var(--line); background: var(--paper); border-radius: 4px; }
.mobile-bottom { display: none; }
@media (max-width: 760px) {
    .quick-nav { display: none; }
    .site-main { padding-top: 104px; padding-bottom: 86px; }
    .top-strip-inner, .site-header-inner, .footer-inner, .site-main { width: calc(100% - 32px); }
    .header-app, .menu-button { padding: 0 10px; }
    .slant-row, .app-split, .method-columns, .about-manifesto { grid-template-columns: 1fr; }
    .slant-media { width: 100%; max-width: 300px; }
    .dual-cards, .scroll-pages, .center-cards, .inner-dual, .volume-layout, .contact-lanes, .app-feature-list { grid-template-columns: 1fr; }
    .period-grid { grid-template-columns: 1fr; }
    .status-row { grid-template-columns: 1fr auto; }
    .status-row p { grid-column: 1 / -1; }
    .slant-entry, .slant-entry:nth-child(even) { grid-template-columns: 1fr; }
    .slant-entry:nth-child(even) .slant-copy, .slant-entry:nth-child(even) .slant-mark { order: initial; }
    .slant-mark, .slant-entry:nth-child(even) .slant-mark { clip-path: none; min-height: 82px; }
    .volume-sheet:nth-child(2n) { transform: none; }
    .topic-row { grid-template-columns: 1fr; }
    .app-visual { height: 280px; }
    .footer-links { grid-template-columns: 1fr 1fr; }
    .site-footer { padding-bottom: calc(78px + env(safe-area-inset-bottom)); }
    .menu-panel { width: 88%; top: 24px; max-height: 360px; }
    .search-panel { inset: 0; width: 100%; height: 100%; transform: none; background: var(--ink); color: var(--paper); border: 0; border-radius: 0; }
    .search-panel.is-open { transform: none; }
    .search-card { padding: 24px 16px; }
    .search-head strong, .search-head button, .search-card label { color: var(--paper); }
    .search-card input { background: #2c2620; border-color: rgba(255,255,255,.18); color: var(--paper); }
    .search-results a { background: #2c2620; color: var(--paper); border-color: rgba(255,255,255,.16); }
    .mobile-bottom { position: fixed; display: grid; grid-template-columns: repeat(4,1fr); left: 0; right: 0; bottom: 0; height: calc(48px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); background: var(--ink); z-index: 130; border-top: 1px solid var(--orange); }
    .mobile-bottom a { min-height: 48px; display: grid; place-items: center; color: var(--paper); font-size: 13px; }
    .mobile-bottom a.is-current { background: var(--orange); color: var(--ink); font-weight: 800; }
}
@media (max-width: 460px) {
    h1 { font-size: 22px; }
    .site-main { width: calc(100% - 32px); }
    .footer-links { grid-template-columns: 1fr 1fr; gap: 14px; }
}
.padded-panel { padding: 22px; }
.section-action { margin-top: 14px; }
.centered-head, .centered-section { text-align: center; }
.lead-centered { margin-left: auto; margin-right: auto; }
.accent-eyebrow { color: var(--paper); }
.section-image { height: 180px; margin-bottom: 16px; }
.note-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.note-grid article { padding: 20px; background: var(--paper); border: 1px solid var(--line); }
.side-note { padding: 20px 22px; background: var(--deep-bg); border-left: 4px solid var(--orange); }
.rule-row { display: grid; grid-template-columns: 130px 1fr; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.rule-row:last-child { border-bottom: 0; }
.rule-row strong { color: var(--ink); }
@media (max-width: 760px) {
    .note-grid, .rule-row { grid-template-columns: 1fr; }
}
.home-slogan { margin: -2px 0 10px; font-size: 20px; line-height: 1.45; font-weight: 800; color: var(--ink); }
.slant-media .image-slot, .app-visual .image-slot { width: 100%; height: 100%; }
.install-track { display: grid; gap: 12px; }
.install-item { display: grid; grid-template-columns: 150px 1fr; gap: 22px; padding: 20px 22px; background: var(--paper); border: 1px solid var(--line); align-items: start; }
.install-item:nth-child(even) { background: var(--soft); transform: translateX(14px); width: calc(100% - 14px); }
.install-item h2 { margin-bottom: 0; padding-top: 2px; border-top: 3px solid var(--orange); }
.grade-bands { border-top: 1px solid var(--line); }
.grade-bands > section { display: grid; grid-template-columns: 180px 1fr; gap: 22px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.grade-bands > section h2 { margin: 0; }
.grade-bands > section p { margin-bottom: 10px; }
.privacy-stack { display: grid; gap: 14px; }
.privacy-stack > section { padding: 20px 22px; background: var(--paper); border: 1px solid var(--line); max-width: 88%; }
.privacy-stack > section:nth-child(even) { margin-left: auto; background: var(--soft); border-left: 4px solid var(--orange); }
@media (max-width: 760px) {
    .install-item, .grade-bands > section { grid-template-columns: 1fr; }
    .install-item:nth-child(even) { transform: none; width: 100%; }
    .privacy-stack > section { max-width: 100%; }
}