:root {
    --bg: #E8E4DC;
    --deep-bg: #D6D0C6;
    --surface: #F6F3ED;
    --surface-2: #EFEBE3;
    --title: #2C2A26;
    --text: #3A372F;
    --muted: #6B675E;
    --soft: #8A8478;
    --rock: #6B675E;
    --deep-rock: #3E3B36;
    --light-rock: #C8C2B6;
    --cream: #F7F3EB;
    --moss: #6A7A58;
    --clay: #A65A3A;
    --border: rgba(62,59,54,0.16);
    --accent-border: rgba(166,90,58,0.40);
    --shadow: 0 12px 28px rgba(44,42,38,0.08);
    --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; color: var(--text); background: var(--bg); font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 15px; line-height: 1.7; overflow-x: hidden; }
body.ui-locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img { max-width: 100%; display: block; }
.shell, .section-shell { width: min(calc(100% - 32px), var(--max)); margin-left: auto; margin-right: auto; }
.section-shell { margin-top: 26px; margin-bottom: 26px; }
.site-main { min-height: 55vh; padding-top: 128px; padding-bottom: 28px; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 120; background: var(--cream); color: var(--deep-rock); padding: 10px 14px; border-radius: 8px; }
.skip-link:focus { top: 8px; }
.stone-line { position: fixed; z-index: 90; top: 0; left: 0; right: 0; height: 22px; background: var(--deep-rock); color: var(--cream); font-size: 12px; }
.stone-line-inner { height: 22px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.text-action { border: 0; background: transparent; color: var(--cream); padding: 0 4px; height: 22px; cursor: pointer; }
.rock-bar { position: fixed; z-index: 88; top: 22px; left: 0; right: 0; height: 56px; background: var(--deep-bg); border-bottom: 1px solid var(--border); }
.rock-bar-inner { height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand-link { min-height: 44px; display: inline-flex; align-items: center; max-width: 48%; }
.brand-logo, .footer-logo, .drawer-logo { height: 26px; width: auto; object-fit: contain; object-position: center; }
.brand-text { font-size: 16px; font-weight: 700; color: var(--title); white-space: nowrap; }
.rock-actions { display: flex; align-items: center; gap: 8px; }
.drawer-button, .app-quick, .drawer-close, .search-head button { min-height: 44px; border-radius: 9px; padding: 0 14px; cursor: pointer; }
.drawer-button, .drawer-close, .search-head button { background: var(--cream); border: 1px solid var(--border); color: var(--deep-rock); }
.app-quick { display: inline-flex; align-items: center; justify-content: center; background: linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%); color: var(--cream); font-size: 14px; }
.rock-tabs { position: fixed; z-index: 86; top: 78px; left: 0; right: 0; height: 38px; background: var(--cream); border-bottom: 1px solid var(--border); }
.rock-tabs-inner { height: 38px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.rock-tabs a { height: 32px; padding: 0 18px; display: inline-flex; align-items: center; border-radius: 8px; font-size: 13px; color: var(--deep-rock); }
.rock-tabs a.is-current { background: var(--deep-rock); color: var(--cream); }
.eyebrow { margin: 0 0 8px; color: var(--clay); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; color: var(--title); font-size: 24px; line-height: 1.3; }
h2 { margin: 0; color: var(--title); font-size: 20px; line-height: 1.4; }
h3 { margin: 0; color: var(--title); font-size: 16px; line-height: 1.45; }
p { margin: 10px 0 0; }
.lead { max-width: 820px; color: var(--text); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 14px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
.section-heading span { color: var(--moss); font-size: 13px; font-weight: 700; white-space: nowrap; }
.primary-button, .secondary-button { min-height: 42px; min-width: 124px; padding: 0 18px; display: inline-flex; align-items: center; justify-content: center; border-radius: 9px; font-size: 14px; margin-top: 18px; }
.primary-button { background: linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%); color: var(--cream); }
.secondary-button { background: var(--cream); color: var(--deep-rock); border: 1px solid var(--accent-border); }
.text-link { display: inline-flex; min-height: 44px; align-items: center; margin-top: 10px; color: var(--clay); font-weight: 700; }
a:hover, button:hover { filter: brightness(.97); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid rgba(166,90,58,.45); outline-offset: 3px; }
.image-slot { width: 100%; border: 1px solid var(--border); background: var(--surface-2); border-radius: 10px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.image-slot img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.slot-168 { height: 168px; }
.slot-190 { height: 190px; }
.slot-banner { height: 220px; }
.slot-app { height: min(340px, 70vw); }
.icon-slot { height: 72px; max-width: 90px; padding: 12px; }
.icon-slot img { width: 48px; height: 48px; }
.home-intro { background: var(--surface); border: 1px solid var(--border); border-left: 5px solid var(--clay); padding: 28px; border-radius: 12px; box-shadow: var(--shadow); }
.intro-mark { min-height: 16px; margin-bottom: 8px; }
.mini-logo { height: 26px; width: auto; object-fit: contain; }
.duo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.duo-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.duo-card h3 { margin-top: 13px; }
.home-shikan, .home-shitai, .home-shelf, .home-sequence, .home-timeline, .home-app, .reading-points, .home-faq, .brand-close { background: rgba(246,243,237,.62); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.wide-copy { max-width: 920px; }
.letter-strips { display: grid; gap: 10px; margin-top: 18px; }
.letter-strips > div { display: grid; grid-template-columns: 54px 1fr; align-items: center; background: var(--cream); border: 1px solid var(--border); border-radius: 9px; min-height: 70px; }
.letter-strips b { height: 100%; display: flex; align-items: center; justify-content: center; background: var(--deep-rock); color: var(--cream); border-radius: 8px 0 0 8px; font-size: 16px; }
.letter-strips span { padding: 12px 14px; }
.letter-strips strong { margin-right: 8px; color: var(--title); }
.note-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 16px; }
.note-columns article { background: var(--cream); border: 1px solid var(--border); border-top: 4px solid var(--moss); padding: 18px; border-radius: 10px; }
.shelf-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 16px; }
.shelf-grid a { min-height: 150px; display: flex; flex-direction: column; justify-content: space-between; gap: 18px; background: var(--cream); border: 1px solid var(--border); border-bottom: 5px solid var(--deep-rock); padding: 16px; border-radius: 9px; }
.shelf-grid strong { font-size: 16px; color: var(--title); }
.shelf-grid span { color: var(--muted); }
.chinese-sequence { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 10px; }
.chinese-sequence li { display: grid; grid-template-columns: 64px 1fr; gap: 14px; align-items: stretch; }
.chinese-sequence b { display: flex; align-items: center; justify-content: center; background: var(--clay); color: var(--cream); border-radius: 10px; }
.chinese-sequence div { background: var(--cream); border: 1px solid var(--border); padding: 14px 16px; border-radius: 10px; }
.chinese-sequence p { margin-top: 4px; }
.status-track { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 16px; position: relative; }
.status-track > div { background: var(--cream); border: 1px solid var(--border); padding: 16px; border-radius: 10px; position: relative; }
.status-track > div::before { content: ''; width: 12px; height: 12px; background: var(--clay); border-radius: 50%; display: block; margin-bottom: 10px; }
.status-track span { color: var(--moss); font-weight: 700; font-size: 13px; }
.status-track strong { display: block; margin-top: 6px; }
.app-copy { max-width: 900px; }
.app-visual-stack { display: grid; grid-template-columns: 90px minmax(0, 420px); align-items: end; gap: 14px; margin-top: 18px; }
.faq-mini-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
details { background: var(--cream); border: 1px solid var(--border); border-radius: 9px; padding: 12px 14px; }
summary { cursor: pointer; color: var(--title); font-weight: 700; min-height: 44px; display: flex; align-items: center; }
.page-hero { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 22px; box-shadow: var(--shadow); }
.page-hero .image-slot { margin-top: 18px; }
.banner-hero .slot-banner { background: var(--surface-2); }
.compact-hero { border-left: 5px solid var(--moss); }
.numbered-longform { display: grid; gap: 12px; }
.numbered-row { display: grid; grid-template-columns: 78px 1fr; background: var(--surface); border: 1px solid var(--border); border-radius: 11px; overflow: hidden; }
.numbered-row > b { background: var(--deep-rock); color: var(--cream); display: flex; align-items: start; justify-content: center; padding-top: 20px; font-size: 18px; }
.numbered-row article { padding: 18px 20px; }
.quiet-callout { background: var(--cream); border: 1px solid var(--accent-border); padding: 20px; border-radius: 11px; }
.observation-directory { display: grid; gap: 0; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.observation-directory article { display: grid; grid-template-columns: 150px 1fr; column-gap: 20px; padding: 22px; border-bottom: 1px solid var(--border); }
.observation-directory article:last-child { border-bottom: 0; }
.observation-directory article h2, .observation-directory article p { grid-column: 2; }
.obs-label { grid-row: 1 / span 4; color: var(--cream); background: var(--moss); border-radius: 9px; padding: 12px; height: fit-content; font-weight: 700; }
.card-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.card-wall article { background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 18px; min-height: 280px; }
.card-wall article span { display: inline-block; color: var(--cream); background: var(--clay); border-radius: 999px; padding: 4px 9px; font-size: 12px; margin-bottom: 10px; }
.deep-notes article:nth-child(2) { border-top-color: var(--clay); }
.stone-check { background: var(--deep-rock); color: var(--cream); border-radius: 12px; padding: 22px; }
.stone-check h2 { color: var(--cream); }
.stone-check ul { margin: 12px 0 0; padding-left: 20px; }
.sequence-editorial { display: grid; gap: 14px; }
.sequence-editorial article { display: grid; grid-template-columns: 72px 1fr; gap: 14px; }
.sequence-editorial b { background: var(--clay); color: var(--cream); display: flex; align-items: center; justify-content: center; border-radius: 12px; min-height: 120px; }
.sequence-editorial div { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.timeline-page { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.timeline-node { position: relative; background: var(--surface); border: 1px solid var(--border); border-top: 5px solid var(--moss); border-radius: 11px; padding: 18px; }
.timeline-node span { color: var(--moss); font-size: 13px; font-weight: 700; }
.timeline-node h2 { margin-top: 8px; }
.state-wait { border-top-color: var(--clay); }
.memo-list { display: grid; gap: 12px; }
.memo-list article { display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: start; background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 16px; }
.memo-box { width: 44px; height: 44px; border: 2px solid var(--moss); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--moss); font-size: 20px; }
.method-hero { background: linear-gradient(180deg, var(--cream), var(--surface)); border-left: 5px solid var(--moss); }
.method-steps { display: grid; gap: 12px; }
.method-steps article { display: grid; grid-template-columns: 56px 1fr; gap: 14px; background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 16px; }
.method-steps article > span { grid-row: 1 / span 3; width: 48px; height: 48px; border-radius: 50%; background: var(--deep-rock); color: var(--cream); display: flex; align-items: center; justify-content: center; }
.theme-list { display: grid; gap: 10px; }
.theme-list > a { display: grid; grid-template-columns: 180px 1fr; gap: 18px; align-items: center; background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 16px; }
.theme-list > a > span { color: var(--cream); background: var(--deep-rock); padding: 16px; border-radius: 9px; text-align: center; font-weight: 700; }
.shelf-library { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.shelf-library article { background: var(--cream); border: 1px solid var(--border); border-bottom: 6px solid var(--deep-rock); border-radius: 10px; padding: 18px; min-height: 280px; }
.shelf-tag { font-size: 12px; color: var(--moss); font-weight: 700; margin-bottom: 8px; }
.shelf-library article > a { display: inline-flex; min-height: 44px; align-items: center; color: var(--clay); font-weight: 700; margin-top: 10px; }
.app-product-hero { display: grid; grid-template-columns: 1fr 440px; column-gap: 24px; align-items: center; }
.app-product-hero .product-icons { grid-column: 2; grid-row: 1 / span 4; }
.product-icons { display: grid; grid-template-columns: 90px 1fr; gap: 10px; align-items: end; }
.product-feature-flow { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.product-feature-flow article { background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 18px; }
.product-feature-flow span { color: var(--clay); font-size: 13px; font-weight: 700; }
.install-steps { counter-reset: install; display: grid; gap: 12px; }
.install-steps article { counter-increment: install; background: var(--surface); border: 1px solid var(--border); border-left: 5px solid var(--moss); border-radius: 10px; padding: 18px; }
.install-steps article h2::before { content: counter(install, cjk-ideographic) '、'; color: var(--clay); }
.terms-hero { border-top: 5px solid var(--deep-rock); }
.terms-sections { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 6px 20px; }
.terms-sections article { padding: 18px 0; border-bottom: 1px solid var(--border); }
.terms-sections article:last-child { border-bottom: 0; }
.help-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.help-grid article { background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 18px; }
.help-grid article > a, .contact-lanes article > a { display: inline-flex; min-height: 44px; align-items: center; color: var(--clay); font-weight: 700; }
.faq-long { display: grid; gap: 10px; }
.faq-long details { padding: 14px 18px; }
.faq-long summary { font-size: 16px; }
.contact-lanes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-lanes article { background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 18px; min-height: 260px; }
.about-statement { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.about-statement article { background: var(--surface); border: 1px solid var(--border); border-radius: 11px; padding: 18px; }
.about-visual { grid-column: 1 / -1; display: grid; grid-template-columns: 320px 1fr; gap: 18px; align-items: center; }
.site-footer { background: #2A2824; color: #E8E4DC; border-top: 1px solid rgba(200,194,182,.25); margin-top: 42px; padding: 28px 0 34px; font-size: 13px; }
.footer-top { display: grid; gap: 20px; }
.footer-brand { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-brand strong { color: var(--cream); font-size: 16px; }
.footer-brand span { color: var(--light-rock); }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.footer-grid section { display: flex; flex-direction: column; gap: 7px; }
.footer-grid h2 { color: var(--cream); font-size: 14px; margin-bottom: 4px; }
.footer-grid a { color: #E8E4DC; min-height: 28px; }
.rights-note { color: #E8E4DC; max-width: 900px; padding-top: 16px; border-top: 1px solid rgba(200,194,182,.2); }
.copyright { color: var(--light-rock); }
.page-overlay { position: fixed; inset: 0; z-index: 96; background: rgba(42,40,36,.45); opacity: 0; visibility: hidden; pointer-events: none; transition: .2s ease; }
.page-overlay.is-open { opacity: 1; visibility: visible; }
.rock-drawer { position: fixed; top: 0; bottom: 0; left: 0; width: 380px; max-width: 88vw; z-index: 100; background: var(--surface); box-shadow: var(--shadow); transform: translateX(-102%); visibility: hidden; pointer-events: none; transition: .22s ease; display: flex; flex-direction: column; }
.rock-drawer.is-open { transform: translateX(0); visibility: visible; pointer-events: auto; }
.drawer-head { min-height: 66px; display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 14px; border-bottom: 1px solid var(--border); background: var(--deep-bg); }
.drawer-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.drawer-scroll { overflow-y: auto; padding: 12px 14px 24px; }
.drawer-scroll section { margin-bottom: 18px; }
.drawer-scroll h2 { font-size: 14px; color: var(--moss); margin: 0 0 8px; }
.drawer-scroll a { display: grid; grid-template-columns: 82px 1fr; gap: 8px; border-top: 1px solid var(--border); padding: 10px 4px; }
.drawer-scroll a span { color: var(--muted); }
.search-panel { position: fixed; z-index: 99; top: 78px; left: 0; right: 0; visibility: hidden; pointer-events: none; opacity: 0; transition: .18s ease; }
.search-panel.is-open { visibility: visible; pointer-events: auto; opacity: 1; }
.search-card { width: min(calc(100% - 32px), 760px); margin: 0 auto; background: var(--deep-bg); border: 1px solid var(--border); box-shadow: var(--shadow); border-radius: 0 0 12px 12px; padding: 18px; }
.search-head { display: flex; justify-content: space-between; align-items: start; gap: 14px; }
.search-head strong { color: var(--title); font-size: 18px; }
.search-head p { color: var(--muted); margin-top: 3px; }
.search-presets { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 14px; }
.search-presets a { min-height: 44px; display: flex; align-items: center; justify-content: center; background: var(--cream); border: 1px solid var(--border); border-radius: 8px; color: var(--deep-rock); }
.mobile-bottom { display: none; }
@media (max-width: 860px) {
    .shelf-grid, .card-wall, .shelf-library { grid-template-columns: 1fr 1fr; }
    .timeline-page { grid-template-columns: 1fr 1fr; }
    .app-product-hero { grid-template-columns: 1fr; }
    .app-product-hero .product-icons { grid-column: 1; grid-row: auto; margin-top: 16px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
    .site-main { padding-top: 88px; padding-bottom: 62px; }
    .rock-tabs { display: none; }
    .stone-line-inner > span { max-width: calc(100% - 54px); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .rock-actions { gap: 6px; }
    .drawer-button, .app-quick { padding: 0 10px; }
    .brand-link { max-width: 42%; }
    .brand-logo { max-width: 100%; }
    .section-shell { margin-top: 18px; margin-bottom: 18px; }
    .home-intro, .page-hero, .home-shikan, .home-shitai, .home-shelf, .home-sequence, .home-timeline, .home-app, .reading-points, .home-faq, .brand-close { padding: 18px; }
    .section-heading { display: block; }
    .section-heading span { display: block; margin-bottom: 5px; }
    .duo-grid, .note-columns, .faq-mini-grid, .product-feature-flow, .help-grid, .contact-lanes, .about-statement { grid-template-columns: 1fr; }
    .shelf-grid, .card-wall, .shelf-library, .timeline-page { grid-template-columns: 1fr; }
    .letter-strips > div { grid-template-columns: 46px 1fr; }
    .status-track { grid-template-columns: 1fr; }
    .app-visual-stack, .product-icons { grid-template-columns: 72px 1fr; }
    .numbered-row { grid-template-columns: 46px 1fr; }
    .numbered-row > b { padding-top: 18px; }
    .numbered-row article { padding: 16px; }
    .observation-directory article { grid-template-columns: 1fr; }
    .observation-directory article h2, .observation-directory article p { grid-column: 1; }
    .obs-label { grid-row: auto; margin-bottom: 10px; }
    .sequence-editorial article { grid-template-columns: 48px 1fr; gap: 10px; }
    .sequence-editorial b { min-height: 100px; }
    .theme-list > a { grid-template-columns: 1fr; }
    .theme-list > a > span { text-align: left; }
    .about-visual { grid-column: auto; grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 16px 12px; }
    .site-footer { padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
    .search-panel { top: 0; bottom: 0; background: var(--deep-rock); color: var(--cream); }
    .search-card { width: 100%; height: 100%; border: 0; border-radius: 0; background: var(--deep-rock); color: var(--cream); padding: 84px 16px 24px; }
    .search-head strong, .search-head p { color: var(--cream); }
    .search-head button { background: var(--cream); color: var(--deep-rock); }
    .search-presets { grid-template-columns: 1fr 1fr; }
    .mobile-bottom { position: fixed; z-index: 85; left: 0; right: 0; bottom: 0; height: calc(48px + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom); display: grid; grid-template-columns: repeat(5, 1fr); background: var(--cream); border-top: 1px solid var(--border); }
    .mobile-bottom a { min-height: 48px; display: flex; align-items: center; justify-content: center; font-size: 12px; color: var(--deep-rock); }
    .mobile-bottom a.is-current { background: var(--clay); color: var(--cream); }
}