/* Hallmark · genre: editorial · macrostructure: Long Document · design-system: design.md */
/* 知识库共用文档层：导语 + 目录 + 正文。各页只换章节内容。 */

.standards-main {
    background: var(--paper);
    padding: 0 0 4.5rem;
    min-height: 60vh;
}

.standards-main > .page-intro + .container,
.standards-main > .page-intro + .standards-container {
    padding-top: 2rem;
}

.standards-container {
    display: grid;
    grid-template-columns: 14.5rem minmax(0, 1fr);
    gap: 1.5rem;
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.15rem 0;
    align-items: start;
}

.standards-main > .container > .standards-container {
    padding-left: 0;
    padding-right: 0;
    max-width: none;
}

.standards-sidebar {
    position: sticky;
    top: 6.5rem;
    max-height: calc(100vh - 7.2rem);
    overflow: auto;
    background: var(--paper) !important;
    border: 1px solid var(--line) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 1.1rem 1rem 1.25rem !important;
}

.standards-sidebar h2 {
    font-family: var(--font-display);
    font-size: .92rem;
    font-weight: 700;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    margin: 0 0 .9rem;
    padding-bottom: .55rem;
}

.standards-nav,
.standards-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.standards-nav li { margin: 0 0 .15rem; }

.standards-nav a {
    display: block;
    padding: .45rem .15rem !important;
    color: var(--ink-2) !important;
    text-decoration: none;
    font-size: .9rem;
    border: 0 !important;
    border-radius: 0 !important;
    background: transparent !important;
}

.standards-nav a:hover,
.standards-nav a:focus-visible,
.standards-nav a.active {
    color: var(--brand-deep) !important;
    background: transparent !important;
    border-left-color: transparent !important;
    text-decoration: underline;
    text-underline-offset: 3px;
    outline: none;
}

.standards-nav a span[aria-hidden] { display: none; }

.nav-parent { position: relative; }
.nav-parent > a { padding-right: 1.5rem; cursor: pointer; }
.nav-parent > a::after {
    content: "";
    position: absolute;
    right: .2rem;
    top: .85rem;
    width: .4rem;
    height: .4rem;
    border-right: 1.5px solid var(--muted);
    border-bottom: 1.5px solid var(--muted);
    transform: rotate(45deg);
}
.nav-parent.expanded > a::after { transform: rotate(225deg); top: 1rem; }

.nav-children {
    list-style: none;
    margin: .15rem 0 .5rem .75rem;
    padding: 0;
    max-height: 0;
    overflow: hidden;
}
.nav-parent.expanded .nav-children { max-height: 80rem; }
.nav-children a { font-size: .84rem; color: var(--muted); }

.standards-content {
    background: var(--paper) !important;
    border: 0 !important;
    border-left: 1px solid var(--line) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    padding: 0 0 2.5rem 1.75rem !important;
    min-width: 0;
}

.standards-content > .section-kicker,
.standards-content > h1:first-of-type,
.standards-content .back-button {
    display: none;
}

.standards-content h2 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    font-style: normal;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
    padding-bottom: .5rem;
    margin: 2.4rem 0 1rem;
    scroll-margin-top: 6.75rem;
}

.standards-content h2:first-of-type { margin-top: 0; }

.standards-content h3 {
    font-family: var(--font-display);
    font-size: 1.12rem;
    font-style: normal;
    color: var(--ink);
    margin: 1.6rem 0 .7rem;
}

.standards-content h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--ink);
    margin: 1.2rem 0 .45rem;
}

.standards-content p,
.standards-content li {
    color: var(--ink-2);
    font-size: 1.02rem;
    line-height: 1.8;
}

.standards-content p { margin: 0 0 1rem; }
.standards-content ul,
.standards-content ol { margin: 0 0 1.2rem; padding-left: 1.25rem; }
.standards-content li { margin-bottom: .4rem; }

.standards-content a {
    color: var(--brand-deep);
    text-underline-offset: 3px;
}

.standards-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.1rem 0 1.5rem;
    font-size: .95rem;
    background: transparent;
    box-shadow: none;
}

.standards-content th,
.standards-content td {
    border-bottom: 1px solid var(--line);
    padding: .55rem .4rem;
    text-align: left;
    vertical-align: top;
}

.standards-content th {
    background: transparent;
    color: var(--muted);
    font-weight: 600;
    font-size: .82rem;
}

.standards-content table tr:hover { background: transparent; }

.info-box,
.highlight-box,
.cta-box,
.app-note {
    background: var(--sand) !important;
    border: 1px solid var(--line) !important;
    border-left: 1px solid var(--line) !important;
    border-radius: 0 !important;
    padding: 1rem 1.1rem;
    margin: 1.25rem 0;
    color: var(--ink-2);
}

.info-box h4,
.highlight-box h4,
.cta-box h4 {
    font-family: var(--font-display);
    margin: 0 0 .4rem;
    color: var(--ink);
}

.standard-card,
.principle-item {
    background: transparent;
    border: 0;
    border-top: 1px solid var(--line);
    border-radius: 0;
    box-shadow: none;
    padding: 1.1rem 0 1.2rem;
    margin: 0;
}

.principles-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.75rem;
    margin: 1rem 0 1.5rem;
}

.app-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 1.75rem;
    margin: 0 0 1.5rem;
}

.app-card {
    background: transparent;
    border: 0;
    border-top: 1px solid var(--line);
    border-radius: 0;
    padding: 1.15rem 0 1.35rem;
}

.app-card h2 {
    font-family: var(--font-display);
    font-size: 1.12rem;
    margin: 0 0 .65rem;
}

.app-cta,
.knowledge-cta {
    display: flex;
    flex-wrap: wrap;
    gap: .65rem .75rem;
    margin: 1.25rem 0 0;
}

.app-cta .btn-detect,
.knowledge-cta .btn-detect {
    display: inline-flex;
    align-items: center;
    padding: .7rem 1.25rem;
    background: var(--brand);
    color: #fff;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
}

.app-cta .btn-ghost,
.knowledge-cta .btn-ghost {
    display: inline-flex;
    align-items: center;
    padding: .7rem 1.25rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink);
    text-decoration: none;
    font-weight: 600;
}

.pain-list {
    list-style: none;
    padding: 0;
    margin: 1.4rem 0 1.6rem;
}

.pain-list li {
    display: grid;
    grid-template-columns: 1fr;
    row-gap: .35rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--line);
    margin: 0;
}

.pain-list .idx {
    font-family: var(--font-latin, var(--font-sans));
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--brand);
}

.pain-list h3 {
    font-family: var(--font-display);
    font-size: 1.22rem;
    margin: 0 0 .4rem;
    border: 0;
    padding: 0;
}

.pain-list .scene {
    margin: 0 0 .85rem;
    font-style: normal;
}

.pain-list .solution {
    margin: 0;
    padding: .75rem .9rem;
    background: var(--sand);
    border: 1px solid var(--line);
    color: var(--ink-2);
    font-size: .95rem;
}

.pain-list .solution .do {
    display: block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    color: var(--brand-deep);
    margin-bottom: .28rem;
}

.pain-list .wcag {
    margin: .45rem 0 0;
    font-size: .75rem;
    color: var(--muted);
}

.scale-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    margin: 1.25rem 0;
}

.scale-card {
    background: var(--paper);
    padding: 1.1rem 1.15rem 1.2rem;
    min-height: 0;
    border-radius: 0;
}

.scale-card .num {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--ink);
    margin: 0;
}

.scale-card .label,
.scale-card .hint {
    color: var(--muted);
    font-size: .86rem;
}

@media (max-width: 991.98px) {
    .standards-container {
        grid-template-columns: 1fr;
    }
    .standards-sidebar {
        position: static;
        max-height: none;
    }
    .standards-content {
        border-left: 0;
        padding-left: 0;
    }
}

.scale-card .chart { margin-top: .75rem; }
.scale-card .source { margin: .55rem 0 0; font-size: .75rem; color: var(--muted); }
.chart-donut,
.chart-gauge { display: flex; align-items: center; gap: .75rem; }
.chart-donut svg,
.chart-gauge svg { flex: 0 0 auto; display: block; }
.chart-donut svg { width: 76px; height: 76px; }
.chart-gauge svg { width: 110px; height: 64px; }
.chart-caption { font-size: .88rem; font-weight: 700; color: var(--brand-deep); }
.chart-caption small { display: block; font-weight: 400; color: var(--muted); margin-top: .15rem; }
.chart-cols {
    display: flex;
    align-items: flex-end;
    justify-content: space-around;
    gap: 1.2rem;
    height: 92px;
}
.chart-cols .col {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    flex: 1;
    height: 100%;
    gap: .25rem;
}
.chart-cols .val { font-size: .78rem; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--ink); }
.chart-cols .stem { width: 28px; background: var(--brand); }
.chart-cols .year { font-size: .75rem; color: var(--muted); }
.chart-pair { display: grid; gap: .4rem; }
.chart-pair div {
    display: grid;
    grid-template-columns: 4.4rem 1fr 2rem;
    align-items: center;
    gap: .45rem;
    font-size: .85rem;
    color: var(--muted);
}
.chart-pair .bar {
    height: 12px;
    background: var(--brand-soft);
    overflow: hidden;
}
.chart-pair .bar > span { display: block; height: 100%; background: var(--brand); }
.scale-note { font-size: .78rem; line-height: 1.65; color: var(--muted); margin: 0 0 1.4rem; }

@media (max-width: 767.98px) {
    .principles-list,
    .app-grid,
    .scale-charts {
        grid-template-columns: 1fr;
    }
}