:root {
    --uni-bg: #050d20;
    --uni-panel: #091a38;
    --uni-panel-soft: rgba(12, 34, 70, 0.72);
    --uni-line: rgba(45, 204, 255, 0.26);
    --uni-gold: #e9c75b;
    --uni-cyan: #25d9f7;
    --uni-text: #eef5ff;
    --uni-muted: #b9c8df;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding-top: 0 !important;
    background: var(--uni-bg);
    color: var(--uni-text);
    font-family: Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.75;
}

* {
    box-sizing: border-box;
}

a {
    color: var(--uni-cyan);
}

.site-header,
.site-footer,
.protocol-page {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.site-header {
    position: relative !important;
    inset: auto !important;
    z-index: 10;
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    height: auto !important;
    min-height: 0 !important;
    padding: 18px 0 !important;
    background: transparent !important;
    backdrop-filter: none !important;
    border-bottom: 1px solid var(--uni-line);
}

.site-logo {
    color: var(--uni-text);
    font-size: 1.3rem;
    font-weight: 750;
    text-decoration: none;
}

.main-navigation {
    position: static !important;
    display: flex !important;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px 20px;
    width: auto !important;
    margin: 0 !important;
    padding: 0 !important;
    background: transparent !important;
    border: 0 !important;
}

.main-navigation a {
    color: var(--uni-muted);
    text-decoration: none;
}

.main-navigation a:hover,
.main-navigation a[aria-current="page"] {
    color: var(--uni-cyan);
}

.page-hero {
    position: relative !important;
    inset: auto !important;
    top: auto !important;
    right: auto !important;
    bottom: auto !important;
    left: auto !important;
    z-index: 1 !important;
    display: block !important;
    grid-template-columns: none !important;
    grid-template-rows: none !important;
    width: 100% !important;
    max-width: none !important;
    height: auto !important;
    min-height: 0 !important;
    max-height: none !important;
    margin-block: 32px 28px !important;
    padding: clamp(28px, 5vw, 58px) !important;
    overflow: visible !important;
    float: none !important;
    clear: both !important;
    transform: none !important;
    border: 1px solid var(--uni-line);
    border-radius: 28px;
    background:
        radial-gradient(circle at 82% 18%, rgba(37, 217, 247, 0.13), transparent 34%),
        linear-gradient(140deg, rgba(12, 37, 77, 0.95), rgba(5, 13, 32, 0.96));
}

.protocol-page {
    display: block !important;
    max-width: 1180px !important;
    padding: 0 !important;
}

.protocol-page > article {
    display: block !important;
    width: 100% !important;
    max-width: none !important;
}

.page-hero > * {
    position: static !important;
    width: auto !important;
    max-width: 100% !important;
    float: none !important;
    transform: none !important;
}

.eyebrow,
.version,
.language-label,
.section-number {
    color: var(--uni-gold);
    font-size: 0.82rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.page-hero h1 {
    margin: 6px 0 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.6rem, 6vw, 4.9rem) !important;
    line-height: 1.04 !important;
    overflow-wrap: anywhere;
}

.page-hero .subtitle {
    margin: 10px 0 2px;
    color: var(--uni-cyan);
    font-size: clamp(1.15rem, 2.4vw, 1.65rem) !important;
}

.page-hero .version {
    display: block !important;
    margin: 12px 0 0 !important;
    line-height: 1.6 !important;
}

.hero-pair {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) !important;
    clear: both;
    width: 100% !important;
    height: auto !important;
    margin-top: 34px !important;
}

.protocol-page article > section,
.case-path,
.chapter-navigation {
    position: relative !important;
    inset: auto !important;
    z-index: 1 !important;
    display: block !important;
    width: 100% !important;
    max-width: none !important;
    height: auto !important;
    min-height: 0 !important;
    max-height: none !important;
    margin-block: 28px !important;
    padding: clamp(24px, 4vw, 46px) !important;
    overflow: visible !important;
    transform: none !important;
    float: none !important;
    clear: both !important;
    border: 1px solid var(--uni-line);
    border-radius: 22px;
    background: var(--uni-panel-soft);
}

.case-path > *,
.protocol-page article > section > .section-number,
.protocol-page article > section > h2 {
    position: static !important;
    inset: auto !important;
    z-index: auto !important;
    width: auto !important;
    height: auto !important;
    max-height: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    float: none !important;
}

.case-path {
    margin-top: 28px !important;
    margin-bottom: 36px !important;
}

.case-path-title {
    display: block !important;
    margin: 0 0 18px !important;
    color: var(--uni-text) !important;
    font-size: 1.2rem !important;
}

.protocol-page h2 {
    margin: 0 0 28px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.protocol-page h3 {
    margin-top: 0;
    font-size: 1.15rem;
}

.bilingual-pair {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
    margin-block: 18px;
    overflow: hidden;
    border: 1px solid rgba(45, 204, 255, 0.18);
    border-radius: 16px;
    background: rgba(4, 14, 34, 0.5);
}

.bilingual-pair > .language-panel {
    min-width: 0;
    padding: 22px 24px;
}

.bilingual-pair > .language-panel + .language-panel {
    border-left: 1px solid rgba(45, 204, 255, 0.18);
}

.language-panel p:first-of-type,
.language-panel ul:first-of-type {
    margin-top: 8px;
}

.language-panel p:last-child,
.language-panel ul:last-child {
    margin-bottom: 0;
}

.centered-bilingual {
    max-width: 900px;
    margin: 22px auto;
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(233, 199, 91, 0.28);
    border-radius: 16px;
    background: rgba(233, 199, 91, 0.06);
}

.centered-bilingual p {
    margin: 8px 0;
}

.case-path ol {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    padding: 0;
    list-style: none;
}

.case-path li,
.mapping-card,
.related-card,
.rule-card,
.etymology-card {
    padding: 20px;
    border: 1px solid rgba(45, 204, 255, 0.18);
    border-radius: 15px;
    background: rgba(4, 14, 34, 0.55);
}

.case-path strong,
.case-path span,
.case-path a {
    display: block;
}

.table-wrapper {
    max-width: 100%;
    overflow-x: auto;
}

table {
    width: 100%;
    min-width: 820px;
    border-collapse: collapse;
}

caption {
    padding: 0 0 18px;
    color: var(--uni-muted);
    text-align: center;
}

th,
td {
    padding: 13px 15px;
    border-bottom: 1px solid rgba(45, 204, 255, 0.16);
    text-align: left;
    vertical-align: top;
}

th {
    color: var(--uni-gold);
}

.mapping-grid,
.related-links,
.protocol-rules {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    padding: 0;
}

.etymology-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.protocol-rules {
    list-style: none;
    counter-reset: spatial-rule;
}

.protocol-rules > li {
    counter-increment: spatial-rule;
}

.protocol-rules > li::before {
    content: "S" counter(spatial-rule);
    display: inline-block;
    margin-bottom: 10px;
    color: var(--uni-cyan);
    font-size: 0.82rem;
    font-weight: 800;
}

.mapping-card p,
.related-card p,
.rule-card p,
.etymology-card p {
    margin-bottom: 0;
}

.related-card {
    color: var(--uni-text);
    text-decoration: none;
}

.related-card:hover {
    border-color: var(--uni-cyan);
}

.protocol-flow {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 12px;
    margin-block: 26px;
}

.protocol-flow > a,
.protocol-flow > strong {
    flex: 1;
    padding: 18px;
    color: var(--uni-text);
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--uni-line);
    border-radius: 14px;
    background: rgba(4, 14, 34, 0.62);
}

.protocol-flow span {
    display: block;
    color: var(--uni-muted);
    font-size: 0.88rem;
}

.protocol-flow > span {
    flex: 0;
    align-self: center;
    color: var(--uni-cyan);
}

.button {
    display: inline-block;
    margin-top: 12px;
    padding: 11px 18px;
    color: #03111e;
    font-weight: 800;
    text-decoration: none;
    border-radius: 999px;
    background: var(--uni-cyan);
}

.chapter-navigation {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.chapter-navigation a {
    padding: 18px;
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--uni-line);
    border-radius: 14px;
}

.chapter-navigation span,
.chapter-navigation strong {
    display: block;
}

.site-footer {
    padding-block: 34px 54px;
    color: var(--uni-muted);
    text-align: center;
}

@media (max-width: 800px) {
    .site-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .main-navigation {
        justify-content: flex-start;
    }

    .bilingual-pair,
    .etymology-grid,
    .mapping-grid,
    .related-links,
    .protocol-rules,
    .case-path ol,
    .chapter-navigation {
        grid-template-columns: 1fr;
    }

    .hero-pair {
        grid-template-columns: 1fr !important;
    }

    .bilingual-pair > .language-panel + .language-panel {
        border-top: 1px solid rgba(45, 204, 255, 0.18);
        border-left: 0;
    }

    .protocol-flow {
        flex-direction: column;
    }

    .protocol-flow > span {
        transform: rotate(90deg);
    }
}