:root {
    --stone: #E8E4DC;
    --stone-deep: #D6D0C6;
    --paper: #F6F3ED;
    --paper-soft: #EFEBE3;
    --title: #2C2A26;
    --text: #3A372F;
    --muted: #6B675E;
    --quiet: #8A8478;
    --rock: #6B675E;
    --rock-deep: #3E3B36;
    --rock-light: #C8C2B6;
    --warm: #F7F3EB;
    --moss: #6A7A58;
    --clay: #A65A3A;
    --border: rgba(62,59,54,0.16);
    --border-strong: 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; }
body { margin: 0; background: var(--stone); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; font-size: 15px; line-height: 1.7; overflow-x: hidden; }
body.ui-locked { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 200; background: var(--warm); color: var(--rock-deep); padding: 8px 12px; border-radius: 8px; }
.skip-link:focus { top: 8px; }
.stone-line { position: fixed; inset: 0 0 auto 0; height: 22px; z-index: 90; background: var(--rock-deep); color: var(--warm); font-size: 12px; }
.stone-line-inner { max-width: var(--max); margin: 0 auto; height: 22px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.line-search { min-height: 22px; border: 0; background: transparent; color: var(--warm); padding: 0 2px; }
.rock-bar { position: fixed; left: 0; right: 0; top: 22px; z-index: 89; height: 56px; background: var(--stone); border-bottom: 1px solid var(--border); }
.rock-bar-inner { max-width: var(--max); margin: 0 auto; height: 56px; padding: 0 16px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand-link { min-height: 44px; display: inline-flex; align-items: center; max-width: 210px; }
.brand-logo, .drawer-logo, .footer-logo { height: 26px; width: auto; object-fit: contain; object-position: center; }
.brand-fallback { font-size: 16px; font-weight: 700; color: var(--title); white-space: nowrap; }
.rock-actions { display: flex; gap: 8px; align-items: center; }
.drawer-button, .app-button, .drawer-close, .search-head button { min-height: 44px; padding: 0 15px; border-radius: 9px; border: 1px solid var(--border-strong); background: var(--warm); color: var(--rock-deep); font-size: 14px; display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; }
.app-button, .primary-button { background: linear-gradient(135deg,#8A8478 0%,#6B675E 55%,#3E3B36 100%); color: var(--warm); border-color: transparent; }
.rock-tabs { position: fixed; top: 78px; left: 0; right: 0; z-index: 88; height: 38px; background: var(--warm); border-bottom: 1px solid var(--border); }
.rock-tabs-inner { max-width: var(--max); margin: 0 auto; height: 38px; padding: 0 16px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.rock-tabs a { height: 30px; min-width: 68px; padding: 0 13px; border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; font-size: 13px; color: var(--rock-deep); }
.rock-tabs a.is-current { background: var(--rock-deep); color: var(--warm); }
.site-main { min-height: 60vh; padding-top: 116px; }
.content-wrap { max-width: var(--max); margin: 0 auto; padding: 34px 16px 64px; }
.page-hero { padding: 34px 0 26px; border-bottom: 1px solid var(--border); }
.page-hero.compact { padding-top: 20px; }
.eyebrow { margin: 0 0 7px; color: var(--clay); font-size: 13px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3 { margin-top: 0; color: var(--title); line-height: 1.3; }
h1 { font-size: 24px; margin-bottom: 14px; }
h2 { font-size: 20px; margin-bottom: 12px; }
h3 { font-size: 16px; margin-bottom: 8px; }
p { margin: 0 0 14px; }
.lead { max-width: 780px; color: var(--text); font-size: 16px; }
.meta-note { color: var(--muted); font-size: 13px; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.primary-button, .secondary-button { height: 42px; padding: 0 18px; border-radius: 9px; font-size: 14px; display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; }
.secondary-button { background: var(--warm); color: var(--rock-deep); border: 1px solid var(--clay); }
a:hover, button:hover { filter: brightness(.97); }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(166,90,58,.34); outline-offset: 2px; }
.section-block { margin-top: 34px; }
.soft-panel { background: var(--paper); border: 1px solid var(--border); border-radius: 11px; box-shadow: var(--shadow); padding: 22px; }
.media-slot { min-height: 110px; background: var(--paper-soft); border: 1px solid var(--border); border-radius: 10px; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.media-slot img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.media-slot.small { min-height: 72px; }
.home-intro { padding: 48px 0 32px; }
.home-intro-inner { max-width: 760px; }
.home-intro .brand-mini { width: 52px; min-height: 44px; margin-bottom: 14px; background: transparent; border: 0; justify-content: flex-start; }
.home-intro .brand-mini img { max-height: 36px; width: auto; }
.dual-feature { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.dual-card { background: var(--paper); border: 1px solid var(--border); border-radius: 11px; overflow: hidden; }
.dual-card .media-slot { height: 168px; min-height: 168px; border: 0; border-bottom: 1px solid var(--border); border-radius: 0; }
.dual-card-body { padding: 20px; }
.number-strips { display: grid; gap: 10px; }
.number-strip { display: grid; grid-template-columns: 58px 1fr; gap: 16px; padding: 16px 18px; background: var(--paper); border: 1px solid var(--border); border-radius: 10px; }
.number-strip .mark { font-size: 18px; font-weight: 800; color: var(--clay); }
.shikan-media { height: 190px; margin: 16px 0 18px; }
.note-columns { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.note-card { background: var(--paper); border-left: 4px solid var(--moss); border-radius: 0 10px 10px 0; padding: 20px; }
.shelf-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
.shelf-cell { min-height: 130px; padding: 18px; background: var(--paper); border: 1px solid var(--border); border-top: 5px solid var(--rock-light); border-radius: 9px; }
.letter-list { display: grid; gap: 12px; }
.letter-item { display: grid; grid-template-columns: 54px 1fr; gap: 15px; align-items: start; padding: 18px; border-radius: 10px; background: var(--paper-soft); border: 1px solid var(--border); }
.letter-item .letter { width: 40px; height: 40px; border-radius: 50%; background: var(--rock-deep); color: var(--warm); display: grid; place-items: center; font-weight: 800; }
.timeline { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 18px; position: relative; }
.timeline::before { content: ""; position: absolute; left: 8%; right: 8%; top: 22px; height: 2px; background: var(--rock-light); }
.timeline-node { position: relative; padding-top: 48px; }
.timeline-node::before { content: ""; position: absolute; top: 14px; left: 18px; width: 17px; height: 17px; border-radius: 50%; background: var(--clay); border: 4px solid var(--warm); box-shadow: 0 0 0 1px var(--border-strong); }
.timeline-node > div { background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.app-stack { display: grid; gap: 18px; background: var(--rock-deep); color: var(--warm); border-radius: 12px; padding: 24px; }
.app-stack h2, .app-stack h3 { color: var(--warm); }
.app-stack .media-slot { max-height: 340px; min-height: 240px; background: var(--warm); }
.app-icons { display: flex; align-items: center; gap: 12px; }
.app-icons .media-slot { width: 58px; min-height: 58px; height: 58px; }
.post-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.post-card { padding: 20px; background: var(--paper); border: 1px solid var(--border); border-radius: 10px; }
.observe-directory { display: grid; grid-template-columns: 200px 1fr; gap: 24px; }
.observe-index { position: sticky; top: 136px; align-self: start; background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.observe-index a { display: block; padding: 7px 4px; color: var(--rock-deep); }
.observe-entries { display: grid; gap: 18px; }
.observe-entry { padding: 22px; background: var(--paper); border: 1px solid var(--border); border-radius: 11px; }
.card-wall { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 14px; }
.wall-card { min-height: 210px; padding: 20px; background: var(--paper); border: 1px solid var(--border); border-radius: 11px; }
.wall-card:nth-child(2n) { background: var(--paper-soft); }
.memo-board { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 18px; }
.memo-column { background: var(--paper); border: 1px solid var(--border); border-radius: 11px; padding: 22px; }
.memo-column ul, .checklist, .plain-list { margin: 0; padding-left: 1.2em; }
.memo-column li, .checklist li, .plain-list li { margin-bottom: 10px; }
.status-track { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 14px; }
.status-node { position: relative; padding: 54px 18px 18px; background: var(--paper); border: 1px solid var(--border); border-radius: 11px; }
.status-node::before { content: ""; position: absolute; top: 22px; left: 18px; width: 26px; height: 4px; border-radius: 99px; background: var(--moss); }
.status-label { display: inline-flex; margin-top: 8px; padding: 3px 9px; border-radius: 999px; background: var(--stone-deep); color: var(--rock-deep); font-size: 12px; }
.check-board { display: grid; gap: 14px; }
.check-item { display: grid; grid-template-columns: 130px 1fr; gap: 16px; padding: 18px; background: var(--paper); border-bottom: 1px solid var(--border); border-radius: 9px; }
.method-steps { counter-reset: step; display: grid; gap: 16px; }
.method-step { position: relative; padding: 22px 22px 22px 76px; background: var(--paper); border: 1px solid var(--border); border-radius: 11px; }
.method-step::before { counter-increment: step; content: counter(step); position: absolute; left: 20px; top: 20px; width: 38px; height: 38px; border-radius: 10px; background: var(--clay); color: var(--warm); display: grid; place-items: center; font-weight: 800; }
.theme-list { display: grid; gap: 12px; }
.theme-row { display: grid; grid-template-columns: minmax(170px, .7fr) 1.5fr; gap: 18px; padding: 20px; border-radius: 10px; background: var(--paper); border: 1px solid var(--border); }
.cabinet { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.cabinet-shelf { background: var(--paper); border: 1px solid var(--border); border-top: 8px solid var(--rock-light); border-radius: 10px; padding: 20px; }
.product-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 24px; align-items: start; }
.product-media .media-slot { min-height: 280px; max-height: 340px; }
.term-sections { display: grid; gap: 18px; }
.term-section { background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 22px; }
.help-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.help-card { background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.faq-list { display: grid; gap: 14px; }
.faq-item { background: var(--paper); border: 1px solid var(--border); border-radius: 10px; padding: 20px; }
.faq-item h2 { font-size: 16px; margin-bottom: 9px; }
.contact-lanes { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 16px; }
.contact-lane { padding: 22px; background: var(--paper); border: 1px solid var(--border); border-radius: 10px; }
.about-band { display: grid; grid-template-columns: 1fr .85fr; gap: 22px; align-items: center; }
.about-band .media-slot { min-height: 220px; height: 220px; }
.site-footer { background: #2A2824; color: #E8E4DC; border-top: 1px solid rgba(200,194,182,.35); }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 34px 16px 76px; }
.footer-brand { display: flex; align-items: center; gap: 12px; padding-bottom: 22px; border-bottom: 1px solid rgba(200,194,182,.22); }
.footer-brand strong { display: block; color: var(--warm); }
.footer-brand span { display: block; color: #C8C2B6; font-size: 12px; }
.footer-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 18px; padding: 24px 0; }
.footer-grid h2 { color: var(--warm); font-size: 13px; margin-bottom: 10px; }
.footer-grid a { display: block; font-size: 13px; color: #E8E4DC; padding: 4px 0; }
.footer-note, .footer-copy { font-size: 13px; color: #C8C2B6; max-width: 860px; }
.page-mask { position: fixed; inset: 0; z-index: 110; background: rgba(42,40,36,.56); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity .2s ease, visibility .2s ease; }
.page-mask.is-active { opacity: 1; visibility: visible; pointer-events: auto; }
.rock-drawer { position: fixed; z-index: 120; top: 0; bottom: 0; left: 0; width: min(380px,88vw); background: var(--paper); box-shadow: 18px 0 44px rgba(42,40,36,.18); transform: translateX(-104%); visibility: hidden; pointer-events: none; transition: transform .25s ease, visibility .25s ease; }
.rock-drawer.is-open { transform: translateX(0); visibility: visible; pointer-events: auto; }
.drawer-head { height: 72px; padding: 0 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.drawer-brand { display: flex; align-items: center; gap: 10px; color: var(--title); }
.drawer-scroll { height: calc(100% - 72px); overflow-y: auto; padding: 14px 16px 34px; }
.drawer-group { padding: 12px 0 4px; }
.drawer-group h2 { font-size: 13px; color: var(--clay); margin-bottom: 7px; }
.drawer-group a { display: block; padding: 10px 8px; border-radius: 8px; }
.drawer-group a:hover { background: var(--stone); }
.drawer-group b { display: block; color: var(--title); font-size: 14px; }
.drawer-group span { display: block; color: var(--muted); font-size: 12px; line-height: 1.5; }
.search-layer { position: fixed; z-index: 119; top: 116px; left: 0; right: 0; visibility: hidden; pointer-events: none; transform: translateY(-12px); opacity: 0; transition: .2s ease; }
.search-layer.is-open { visibility: visible; pointer-events: auto; transform: translateY(0); opacity: 1; }
.search-card { max-width: 720px; margin: 14px auto 0; padding: 20px; border: 1px solid var(--border); border-radius: 12px; background: var(--stone); box-shadow: var(--shadow); }
.search-head { display: flex; justify-content: space-between; align-items: start; gap: 16px; }
.search-head strong { color: var(--title); font-size: 16px; }
.search-head p { color: var(--muted); margin: 2px 0 0; font-size: 13px; }
.search-label { display: block; margin: 14px 0 6px; color: var(--rock-deep); font-size: 13px; }
.search-input { width: 100%; min-height: 44px; border: 1px solid var(--border-strong); border-radius: 9px; background: var(--warm); color: var(--text); padding: 0 12px; }
.search-presets { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.search-presets a { min-height: 40px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--border); background: var(--paper); color: var(--rock-deep); display: inline-flex; align-items: center; }
.search-empty { color: var(--muted); margin-top: 12px; }
.mobile-bottom { display: none; }
@media (max-width: 820px) {
    .rock-tabs { display: none; }
    .site-main { padding-top: 78px; padding-bottom: 54px; }
    .content-wrap { padding: 26px 16px 48px; }
    .dual-feature, .note-columns, .post-grid, .memo-board, .cabinet, .help-grid, .contact-lanes, .product-layout, .about-band { grid-template-columns: 1fr; }
    .card-wall { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .shelf-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .timeline { grid-template-columns: 1fr; }
    .timeline::before { left: 26px; top: 18px; bottom: 18px; width: 2px; height: auto; right: auto; }
    .timeline-node { padding: 0 0 0 58px; }
    .timeline-node::before { left: 18px; top: 18px; }
    .status-track { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .observe-directory { grid-template-columns: 1fr; }
    .observe-index { position: static; display: flex; flex-wrap: wrap; gap: 4px 12px; }
    .observe-index a { padding: 4px 0; }
    .footer-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .search-layer { top: 0; bottom: 0; background: var(--rock-deep); }
    .search-layer.is-open { transform: none; }
    .search-card { max-width: none; margin: 0; min-height: 100%; border: 0; border-radius: 0; background: var(--rock-deep); color: var(--warm); padding: 28px 16px; }
    .search-head strong, .search-label { color: var(--warm); }
    .search-head p { color: var(--rock-light); }
    .search-head button { background: var(--warm); color: var(--rock-deep); }
    .search-presets a { background: var(--warm); color: var(--rock-deep); }
    .search-empty { color: var(--rock-light); }
    .mobile-bottom { position: fixed; display: grid; grid-template-columns: repeat(5,1fr); left: 0; right: 0; bottom: 0; z-index: 87; min-height: 48px; padding-bottom: env(safe-area-inset-bottom); background: var(--warm); 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(--rock-deep); }
    .mobile-bottom a.is-current { background: var(--clay); color: var(--warm); }
    .footer-inner { padding-bottom: 88px; }
}
@media (max-width: 560px) {
    .stone-line-inner, .rock-bar-inner { padding-left: 16px; padding-right: 16px; }
    .stone-line-inner > span { max-width: 72%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .brand-link { max-width: 132px; }
    .rock-actions { gap: 6px; }
    .drawer-button, .app-button { padding: 0 11px; }
    .page-hero { padding-top: 24px; }
    .home-intro { padding-top: 34px; }
    .card-wall, .shelf-grid, .status-track, .footer-grid { grid-template-columns: 1fr; }
    .number-strip, .letter-item, .check-item, .theme-row { grid-template-columns: 1fr; gap: 8px; }
    .number-strip .mark { font-size: 16px; }
    .app-stack { padding: 18px; }
    .product-media .media-slot { min-height: 220px; }
    .about-band .media-slot { min-height: 180px; height: 180px; }
}
.home-intro-inner > .media-slot { width: 52px; min-height: 44px; height: 44px; margin-bottom: 14px; background: transparent; border: 0; justify-content: flex-start; }
.home-intro-inner > .media-slot img { width: auto; max-height: 36px; }