:root {
    --bg: #0C0B0A;
    --deep: #161311;
    --content: #1C1916;
    --soft: #26221D;
    --paper: #F3E6D2;
    --title: #FFF8F0;
    --text: #EDE4D8;
    --muted: #B7A898;
    --assist: #8A7B6C;
    --red: #E11D2E;
    --red-hi: #FF4A4F;
    --wine: #8B1E2D;
    --rust: #E25A2A;
    --amber: #E2B14A;
    --border: rgba(226,177,74,.16);
    --border-strong: rgba(225,29,46,.40);
    --shadow: 0 18px 44px rgba(0,0,0,.46);
    --footer: #080706;
    --footer-text: #D8CBBA;
    --max: 1280px;
    --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    overflow-wrap: anywhere;
}
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--red-hi); }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 3px solid rgba(255,74,79,.72);
    outline-offset: 3px;
}
button, input, summary { font: inherit; }
button { cursor: pointer; }
.skip-link {
    position: absolute;
    left: 16px;
    top: -80px;
    z-index: 50;
    background: var(--paper);
    color: #2a211a;
    padding: 10px 14px;
    border-radius: 6px;
}
.skip-link:focus { top: 12px; }

.brand-header {
    border-bottom: 1px solid var(--border);
    background: var(--deep);
}
.brand-inner {
    max-width: var(--max);
    min-height: 80px;
    margin: 0 auto;
    padding: 14px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}
.brand-lockup, .footer-lockup {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}
.brand-logo, .footer-logo {
    display: block;
    height: clamp(28px, 3vw, 36px);
    width: auto;
    object-fit: contain;
    object-position: center;
}
.brand-wordmark {
    color: var(--title);
    font-weight: 900;
    letter-spacing: .08em;
    font-size: 24px;
    white-space: nowrap;
}
.brand-english {
    color: var(--muted);
    font-size: 12px;
    letter-spacing: .16em;
    white-space: nowrap;
}
.header-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
}
.header-links a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 8px 10px;
    border-bottom: 2px solid transparent;
    color: var(--text);
}
.header-links a[aria-current="page"] { border-color: var(--red); color: var(--title); }

.tool-zone { background: #12100e; border-bottom: 1px solid var(--border); }
.tool-zone-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 10px 22px;
    display: grid;
    grid-template-columns: minmax(0,1fr);
    gap: 8px;
}
.tool-panel { min-width: 0; }
.tool-panel > summary {
    list-style: none;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--content);
    color: var(--title);
    cursor: pointer;
    font-weight: 700;
}
.tool-panel > summary::-webkit-details-marker { display: none; }
.summary-state::before { content: "+"; color: var(--red-hi); font-size: 20px; }
.tool-panel[open] .summary-state::before { content: "−"; }
.tool-content {
    margin-top: 8px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--deep);
}
.directory-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 18px;
}
.directory-group { min-width: 0; }
.directory-group h3 { margin: 0 0 8px; font-size: 15px; color: var(--paper); }
.directory-group ul, .search-results, .sidebar-group ul, .footer-directory ul, .plain-list, .check-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.directory-group li + li { margin-top: 5px; }
.directory-group a {
    display: block;
    min-height: 44px;
    padding: 8px 10px;
    border-left: 2px solid transparent;
    background: rgba(255,255,255,.018);
}
.directory-group a[aria-current="page"] { border-left-color: var(--red); background: rgba(225,29,46,.08); }
.directory-group strong { display: block; color: var(--title); font-size: 14px; }
.directory-group span { display: block; margin-top: 2px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.tool-actions { grid-column: 1 / -1; margin-top: 4px; }
.text-button, .secondary-button, .primary-button {
    min-height: 44px;
    border-radius: 6px;
    padding: 9px 14px;
    border: 1px solid var(--border);
}
.text-button { background: transparent; color: var(--paper); }
.secondary-button { background: var(--paper); color: #2a211a; border-color: transparent; font-weight: 700; }
.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg,#FF4A4F 0%,#E11D2E 46%,#E25A2A 100%);
    color: #fffaf4;
    border-color: transparent;
    font-weight: 800;
}
.site-search-form label { display: block; margin-bottom: 7px; color: var(--paper); font-weight: 700; }
.search-controls { display: flex; gap: 8px; }
.search-controls input {
    min-width: 0;
    flex: 1 1 auto;
    min-height: 44px;
    border: 1px solid var(--border);
    background: #0f0d0c;
    color: var(--title);
    border-radius: 6px;
    padding: 9px 12px;
}
.search-note, .no-results { color: var(--muted); font-size: 14px; }
.search-results {
    display: grid;
    grid-template-columns: repeat(2, minmax(0,1fr));
    gap: 6px 12px;
}
.search-results li[hidden] { display: none; }
.search-results a { display: block; min-height: 44px; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.search-results strong { color: var(--title); }
.search-results span { display: block; color: var(--muted); font-size: 13px; line-height: 1.55; }

.content-frame {
    width: min(var(--max), calc(100% - 44px));
    margin: 0 auto;
    padding: 40px 0 58px;
    display: grid;
    grid-template-columns: minmax(0,1fr);
    gap: 24px;
}
.desktop-sidebar { display: none; min-width: 0; }
.main-content { min-width: 0; }

.breadcrumb { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--paper); }
.page-header { margin-bottom: 34px; }
.eyebrow {
    margin: 0 0 8px;
    color: var(--red-hi);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .12em;
}
h1, h2, h3 { color: var(--title); line-height: 1.3; }
h1 { margin: 0; font-size: clamp(28px, 3vw, 32px); letter-spacing: -.02em; }
h2 { font-size: clamp(21px, 2.3vw, 26px); margin: 0 0 14px; }
h3 { font-size: 18px; margin: 0 0 8px; }
.lead { max-width: 820px; margin: 14px 0 0; color: #e8dccd; font-size: 17px; line-height: 1.9; }
.article-narrow { max-width: 780px; }
.article-narrow > * + * { margin-top: 34px; }
.content-section { margin-top: 46px; }
.content-section:first-child { margin-top: 0; }
.content-section p { margin: 0 0 15px; }
.content-section p:last-child { margin-bottom: 0; }
.rule-top { border-top: 1px solid var(--border-strong); padding-top: 24px; }
.paper-panel {
    background: var(--paper);
    color: #2d241d;
    border-radius: 8px;
    padding: 20px;
}
.paper-panel h2, .paper-panel h3 { color: #1d1712; }
.paper-panel a { color: #761722; }
.note-box {
    border-left: 3px solid var(--red);
    background: rgba(225,29,46,.055);
    padding: 16px 18px;
    border-radius: 0 6px 6px 0;
}
.editor-observation {
    border-left: 3px solid var(--amber);
    padding: 16px 18px;
    background: rgba(226,177,74,.055);
}
.editor-observation::before {
    content: "编辑观察";
    display: inline-block;
    margin-bottom: 8px;
    color: var(--amber);
    font-size: 13px;
    font-weight: 800;
}

.content-image {
    display: block;
    max-width: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    object-position: center;
    margin-inline: auto;
}
.image-fallback {
    width: 100%;
    min-height: 120px;
    max-height: 180px;
    display: grid;
    place-items: center;
    padding: 18px;
    background: linear-gradient(135deg,#21100f,#5b1820);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    color: var(--paper);
    text-align: center;
    font-weight: 800;
}
.hero-image { max-height: 300px; }
.landscape-image { max-height: 240px; }
.portrait-image { max-height: 420px; }
.app-image { max-height: 420px; }
.inline-image { margin-top: 18px; }
.figure-box { margin: 0; min-width: 0; padding: 12px; background: var(--deep); border: 1px solid var(--border); border-radius: 8px; }
.figure-box figcaption { margin-top: 8px; color: var(--muted); font-size: 13px; text-align: center; }

.hero-editorial {
    display: grid;
    grid-template-columns: minmax(0,1fr) minmax(0,1fr);
    align-items: center;
    gap: 28px;
    padding: 26px;
    background: var(--content);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    border-radius: 10px;
}
.hero-editorial p { margin: 12px 0 0; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.button-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 14px;
    border-radius: 6px;
    border: 1px solid var(--border);
    font-weight: 800;
}
.button-link.primary { background: linear-gradient(135deg,#FF4A4F 0%,#E11D2E 46%,#E25A2A 100%); color: #fffaf4; border-color: transparent; }
.button-link.secondary { background: var(--paper); color: #2d241d; border-color: transparent; }

.path-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 12px; }
.path-item { padding: 15px; border-top: 2px solid var(--red); background: var(--deep); min-width: 0; }
.path-item strong { color: var(--title); display: block; }
.path-item span { display: block; margin-top: 5px; color: var(--muted); font-size: 14px; line-height: 1.65; }

.digest-layout, .split-layout, .media-split, .mobile-reading {
    display: grid;
    grid-template-columns: minmax(240px,.8fr) minmax(0,1.45fr);
    gap: 26px;
    align-items: start;
}
.digest-list > article + article { border-top: 1px solid var(--border); margin-top: 18px; padding-top: 18px; }
.digest-list h3 a { color: var(--title); }
.digest-list p { color: var(--text); }

.focus-image-wrap { margin-bottom: 22px; }
.focus-copy-grid { display: grid; grid-template-columns: minmax(0,1.5fr) repeat(3,minmax(0,.7fr)); gap: 16px; }
.focus-copy-grid > * { min-width: 0; }
.focus-main { padding-right: 12px; }
.focus-short { padding: 14px; background: var(--deep); border-top: 2px solid var(--wine); }
.focus-short p { color: var(--muted); font-size: 14px; line-height: 1.7; }

.editorial-pair { display: grid; grid-template-columns: minmax(0,1.25fr) minmax(0,.9fr); gap: 22px; align-items: start; }
.editorial-unit { min-width: 0; }
.editorial-unit.secondary-unit { padding-top: 38px; }
.editorial-unit .figure-box { margin-bottom: 16px; }
.mini-points { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; margin-top: 14px; }
.mini-points p { margin: 0; padding: 12px; background: var(--deep); color: var(--muted); font-size: 14px; }

.horizontal-band {
    display: grid;
    grid-template-columns: minmax(240px,.85fr) minmax(0,1.4fr);
    gap: 24px;
    align-items: center;
    padding: 20px 0;
    border-top: 1px solid var(--border);
}
.horizontal-band.reverse { grid-template-columns: minmax(0,1.4fr) minmax(240px,.85fr); }
.horizontal-band.reverse .band-copy { order: 1; }
.horizontal-band.reverse .figure-box { order: 2; }
.fact-points, .status-grid, .comparison-grid, .topic-grid, .three-grid, .service-grid {
    display: grid;
    gap: 12px;
}
.fact-points { grid-template-columns: repeat(3,minmax(0,1fr)); margin-top: 16px; }
.fact-points div, .status-card, .comparison-card, .service-card {
    min-width: 0;
    padding: 14px;
    background: var(--deep);
    border: 1px solid var(--border);
}
.fact-points strong, .status-card strong, .comparison-card strong { display: block; color: var(--paper); margin-bottom: 5px; }
.fact-points p, .status-card p, .comparison-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }

.comparison-grid { grid-template-columns: repeat(3,minmax(0,1fr)); margin-top: 18px; }
.status-grid { grid-template-columns: repeat(3,minmax(0,1fr)); margin-top: 18px; }
.status-card { border-top: 2px solid var(--red); }
.status-card:nth-child(2n) { border-top-color: var(--amber); }

.topic-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
.topic-entry { padding: 18px; border: 1px solid var(--border); background: var(--deep); }
.topic-entry h3 { margin-bottom: 8px; }
.topic-entry p { color: var(--muted); }
.longform-preview { border-top: 1px solid var(--border-strong); margin-top: 22px; padding-top: 22px; }
.longform-preview article + article { margin-top: 22px; }

.red-rule-section { border-top: 2px solid var(--red); padding-top: 22px; }
.mobile-reading { grid-template-columns: minmax(0,1.4fr) minmax(220px,.7fr); align-items: center; }
.final-text-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.final-text-grid article { min-width: 0; padding-top: 18px; border-top: 2px solid var(--border-strong); }
.final-text-grid p { color: var(--muted); }

.article-index {
    padding: 16px 18px;
    border: 1px solid var(--border);
    background: var(--deep);
    border-radius: 8px;
}
.article-index h2 { font-size: 18px; }
.article-index ol { margin: 0; padding-left: 22px; }
.article-index a { color: var(--paper); text-decoration: underline; text-decoration-color: rgba(225,29,46,.55); text-underline-offset: 4px; }

.info-pair { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; }
.info-pair > div { padding: 16px; border: 1px solid var(--border); background: var(--deep); }
.info-pair h3 { color: var(--paper); }
.stage-sections > section, .flow-sections > section { padding: 22px 0; border-top: 1px solid var(--border); }
.stage-sections > section:first-child, .flow-sections > section:first-child { border-top: 0; padding-top: 0; }

.reading-stages { display: grid; gap: 12px; }
.reading-stage { display: grid; grid-template-columns: 48px minmax(0,1fr); gap: 14px; align-items: start; }
.reading-stage span { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: var(--wine); color: #fff; font-weight: 800; }
.reading-stage div { padding: 12px 15px; background: var(--deep); border-left: 2px solid var(--red); }

.table-wrap { max-width: 100%; }
table { width: 100%; border-collapse: collapse; background: var(--deep); }
th, td { padding: 12px 13px; text-align: left; border: 1px solid var(--border); vertical-align: top; }
th { color: var(--paper); background: #211d19; }
td { color: var(--text); }

.faq-list details {
    border-top: 1px solid var(--border);
    padding: 0;
}
.faq-list details:last-child { border-bottom: 1px solid var(--border); }
.faq-list summary {
    min-height: 56px;
    display: flex;
    align-items: center;
    color: var(--title);
    font-weight: 800;
    cursor: pointer;
    padding: 12px 4px;
}
.faq-list details p { margin: 0; padding: 0 4px 18px; color: var(--text); }

.related-links {
    margin-top: 44px;
    padding-top: 22px;
    border-top: 1px solid var(--border-strong);
}
.related-links h2 { font-size: 20px; }
.related-links ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.related-links a { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; }

.site-footer {
    background: var(--footer);
    color: var(--footer-text);
    border-top: 1px solid var(--red);
}
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 34px 22px 38px; }
.footer-brand { display: grid; grid-template-columns: minmax(220px,.7fr) minmax(0,1.6fr); gap: 24px; align-items: start; }
.footer-lockup strong { display: block; color: var(--title); }
.footer-lockup small { display: block; color: var(--muted); letter-spacing: .1em; }
.footer-brand p { margin: 0; color: #b8aa9a; }
.footer-directory { margin-top: 28px; display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 18px; }
.footer-directory section { min-width: 0; }
.footer-directory h2 { margin: 0 0 9px; font-size: 14px; color: var(--paper); }
.footer-directory a { min-height: 34px; display: inline-flex; align-items: center; color: #cfc1b0; font-size: 14px; }
.footer-directory a[aria-current="page"] { color: var(--red-hi); font-weight: 800; }
.footer-copy { margin: 28px 0 0; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.08); color: #9c8e80; font-size: 13px; }
.mobile-bottom-nav { display: none; }

@media (min-width: 1100px) {
    .tool-zone-inner { grid-template-columns: minmax(0,1fr); }
    .directory-tool { display: none; }
    .content-frame { grid-template-columns: 196px minmax(0,1fr); }
    .desktop-sidebar { display: block; }
    .sidebar-inner { min-width: 0; }
    .sidebar-group + .sidebar-group { margin-top: 18px; }
    .sidebar-group h2 { margin: 0 0 6px; color: var(--muted); font-size: 12px; letter-spacing: .12em; }
    .sidebar-group a {
        position: relative;
        min-height: 42px;
        display: flex;
        align-items: center;
        padding: 7px 10px 7px 16px;
        border-radius: 5px;
        color: var(--text);
        font-size: 14px;
    }
    .sidebar-group a::before {
        content: "";
        position: absolute;
        left: 5px;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: #5a4e43;
        pointer-events: none;
    }
    .sidebar-group a.is-current { background: rgba(225,29,46,.09); color: var(--title); font-weight: 800; }
    .sidebar-group a.is-current::before { width: 8px; height: 2px; border-radius: 1px; background: var(--red); }
    .sidebar-directory-link { margin-top: 20px; min-height: 44px; display: inline-flex; align-items: center; color: var(--paper); border-bottom: 1px solid var(--red); }
}

@media (max-width: 900px) {
    .hero-editorial, .digest-layout, .split-layout, .media-split, .mobile-reading, .horizontal-band, .horizontal-band.reverse { grid-template-columns: minmax(0,1fr); }
    .horizontal-band.reverse .band-copy, .horizontal-band.reverse .figure-box { order: initial; }
    .focus-copy-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .focus-main { grid-column: 1 / -1; padding-right: 0; }
    .path-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .footer-directory { grid-template-columns: repeat(3,minmax(0,1fr)); }
    .footer-brand { grid-template-columns: minmax(0,1fr); }
}

@media (max-width: 767px) {
    body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
    .brand-inner { min-height: 64px; padding: 10px 16px; gap: 10px; }
    .brand-english { display: none; }
    .brand-wordmark { font-size: 21px; }
    .header-links { gap: 4px; }
    .header-links a { padding-inline: 7px; font-size: 14px; }
    .tool-zone-inner { padding: 8px 16px; }
    .tool-content { padding: 13px; }
    .directory-grid, .search-results { grid-template-columns: minmax(0,1fr); }
    .content-frame { width: calc(100% - 32px); padding: 30px 0 42px; }
    h1 { font-size: clamp(24px,7vw,28px); }
    .lead { font-size: 16px; }
    .content-section { margin-top: 34px; }
    .hero-editorial { padding: 18px; gap: 18px; }
    .hero-editorial .hero-copy { order: 1; }
    .hero-editorial .figure-box { order: 2; }
    .hero-image { max-height: 260px; }
    .portrait-image, .app-image { max-height: 360px; }
    .image-fallback { max-height: 140px; min-height: 108px; }
    .path-grid, .topic-grid, .three-grid, .service-grid, .final-text-grid, .editorial-pair { grid-template-columns: minmax(0,1fr); }
    .editorial-unit.secondary-unit { padding-top: 0; }
    .focus-copy-grid, .fact-points, .comparison-grid, .status-grid { grid-template-columns: minmax(0,1fr); }
    .mini-points { grid-template-columns: minmax(0,1fr); }
    .search-controls { flex-wrap: wrap; }
    .search-controls input { flex-basis: 100%; }
    .info-pair { grid-template-columns: minmax(0,1fr); }
    .footer-inner { padding: 30px 16px calc(34px + env(safe-area-inset-bottom)); }
    .footer-directory { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .mobile-bottom-nav {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 40;
        display: grid;
        grid-template-columns: repeat(5,minmax(0,1fr));
        min-height: calc(56px + env(safe-area-inset-bottom));
        padding-bottom: env(safe-area-inset-bottom);
        background: rgba(8,7,6,.98);
        border-top: 1px solid rgba(225,29,46,.55);
    }
    .mobile-bottom-nav a {
        min-width: 0;
        min-height: 56px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 6px 3px;
        color: #cfc1b0;
        font-size: 13px;
        font-weight: 700;
    }
    .mobile-bottom-nav a.is-current { color: var(--red-hi); background: rgba(225,29,46,.08); }
    .table-wrap.mobile-stack table, .table-wrap.mobile-stack tbody, .table-wrap.mobile-stack tr, .table-wrap.mobile-stack td { display: block; width: 100%; }
    .table-wrap.mobile-stack thead { display: none; }
    .table-wrap.mobile-stack tr { margin-bottom: 14px; border: 1px solid var(--border); background: var(--deep); }
    .table-wrap.mobile-stack td { border: 0; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: minmax(92px,.42fr) minmax(0,1fr); gap: 10px; }
    .table-wrap.mobile-stack td:last-child { border-bottom: 0; }
    .table-wrap.mobile-stack td::before { content: attr(data-label); color: var(--paper); font-weight: 800; }
}

@media (max-width: 420px) {
    .header-faq-link { display: none !important; }
    .footer-directory { grid-template-columns: minmax(0,1fr); }
    .button-row { display: grid; grid-template-columns: minmax(0,1fr); }
    .button-link { width: 100%; }
}