:root {
    --paper: #f3f0e8;
    --paper-strong: #ebe6db;
    --ink: #171c1a;
    --muted: #56605b;
    --line: #b9b8ae;
    --line-strong: #8b8f87;
    --accent: #173f35;
    --accent-soft: #dce6e1;
    --surface: #f9f7f1;
    --shadow: rgba(23, 28, 26, 0.08);
    --serif: "Iowan Old Style", "Palatino Linotype", "Noto Serif SC", "Songti SC", "STSong", serif;
    --mono: "SFMono-Regular", "IBM Plex Mono", "Courier New", monospace;
    --sans: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    background:
        linear-gradient(to bottom, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0)),
        var(--paper);
    color: var(--ink);
    font-family: var(--serif);
    line-height: 1.7;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    text-underline-offset: 0.18rem;
}

img {
    display: block;
    max-width: 100%;
}

.site-shell {
    max-width: 1360px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 1.25rem;
}

.site-header,
.site-frame,
.site-footer {
    border: 1px solid var(--line-strong);
    background: var(--surface);
    box-shadow: 0 1rem 2rem var(--shadow);
}

.site-header {
    padding: 1rem 1.25rem 0;
}

.masthead {
    display: grid;
    gap: 0.6rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--line);
}

.masthead-kicker,
.sidebar-label,
.entry-meta,
.entry-note,
.timeline-date,
.log-date,
.archive-panel-label,
.inline-links a,
.site-footer,
.top-nav-link {
    font-family: var(--mono);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.masthead-kicker {
    font-size: 0.72rem;
    color: var(--muted);
}

.masthead-brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.masthead-logo {
    width: clamp(42px, 4vw, 58px);
    height: clamp(42px, 4vw, 58px);
    object-fit: contain;
    flex-shrink: 0;
}

.masthead-text {
    display: grid;
    gap: 0.15rem;
    min-width: 0;
}

.masthead-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    color: var(--ink);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.masthead-subtitle {
    color: var(--accent);
    font-size: 0.92rem;
    font-family: var(--mono);
    letter-spacing: 0.04em;
}

.masthead-affiliation {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
    font-family: var(--sans);
}

.top-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 0.5rem 1.25rem;
    padding: 0.9rem 0 1rem;
}

.top-nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.top-nav-link {
    display: inline-block;
    padding: 0.15rem 0 0.4rem;
    border-bottom: 1px solid transparent;
    color: var(--muted);
    font-size: 0.78rem;
}

.top-nav-link.is-active,
.top-nav-link:hover {
    color: var(--accent);
    border-color: var(--accent);
    text-decoration: none;
}

.language-switch {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: auto;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.language-switch a {
    color: var(--muted);
    text-decoration: none;
}

.language-switch a.is-active {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 0.18rem;
}

.site-frame {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    margin-top: 1rem;
}

.site-sidebar {
    padding: 1.4rem 1.1rem;
    border-right: 1px solid var(--line);
    background:
        linear-gradient(to bottom, rgba(23, 63, 53, 0.04), rgba(23, 63, 53, 0)),
        var(--paper-strong);
}

.sidebar-block + .sidebar-block {
    margin-top: 1.2rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--line);
}

.sidebar-label {
    margin: 0 0 0.5rem;
    color: var(--muted);
    font-size: 0.72rem;
}

.sidebar-current {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.sidebar-text {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.sidebar-index,
.sidebar-links {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.45rem;
}

.sidebar-index a,
.sidebar-links a {
    color: var(--ink);
    font-size: 0.92rem;
}

.site-main {
    min-width: 0;
    padding: 1.6rem 1.8rem 2rem;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1rem;
    padding: 0.9rem 1.25rem;
    color: var(--muted);
    font-size: 0.72rem;
}

.site-footer p {
    margin: 0;
}

.page-header {
    padding-bottom: 0.7rem;
    border-bottom: 1px solid var(--line);
}

.page-header h1,
.portal-title,
.section-heading h2 {
    margin: 0;
    font-weight: 600;
    line-height: 1.18;
}

.page-header h1 {
    font-size: clamp(2rem, 3vw, 2.8rem);
}

.page-description {
    max-width: 48rem;
    margin: 0.38rem 0 0;
    color: var(--muted);
    font-size: 1rem;
}

.page-section {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--line);
}

.page-header + .page-section {
    border-top: 0;
    margin-top: 0.62rem;
    padding-top: 0.62rem;
}

.section-heading {
    display: grid;
    gap: 0.2rem;
    margin-bottom: 0.65rem;
}

.section-heading h2 {
    font-size: 1.45rem;
}

.section-link {
    margin: 1rem 0 0;
    font-family: var(--mono);
    font-size: 0.84rem;
}

.prose-block {
    max-width: 52rem;
}

.prose-block p,
.document-entry p,
.bibliography-entry p,
.timeline-body p,
.archive-grid-item p,
.error-record p {
    margin: 0.55rem 0 0;
}

.portal-hero {
    display: block;
    padding-bottom: 1.05rem;
    border-bottom: 1px solid var(--line-strong);
}

.portal-copy {
    display: grid;
    gap: 1rem;
}

.portal-title {
    font-size: clamp(2.6rem, 6vw, 4.6rem);
}

.portal-subtitle,
.portal-summary {
    margin: 0;
}

.portal-subtitle {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

.portal-summary {
    max-width: 44rem;
    font-size: 1.06rem;
    color: var(--ink);
}

.portal-hero + .page-section {
    border-top: 0;
    padding-top: 0.7rem;
    margin-top: 0.7rem;
}

.portal-index {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin: 0.6rem 0 0;
    padding: 0;
    list-style: none;
}

.portal-index li {
    border-top: 1px solid var(--line);
    padding-top: 0.75rem;
}

.portal-index a {
    display: grid;
    gap: 0.25rem;
}

.portal-index-title {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.portal-index-desc {
    color: var(--muted);
    font-size: 0.94rem;
}

.archive-panel,
.archive-grid-item,
.document-entry,
.bibliography-entry,
.faq-item,
.error-record {
    padding: 1rem;
}

.archive-panel-label {
    margin: 0 0 0.35rem;
    color: var(--muted);
    font-size: 0.7rem;
}

.archive-panel-value {
    margin: 0;
    font-size: 0.96rem;
}

.keyword-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.keyword-list span {
    display: inline-flex;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--line);
    background: var(--surface);
    font-family: var(--mono);
    font-size: 0.74rem;
}

.log-list,
.document-list,
.bibliography-list,
.faq-list {
    display: grid;
    gap: 0;
}

.log-entry,
.timeline-entry {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 1rem;
    padding: 0.9rem 0;
    border-top: 1px solid var(--line);
}

.log-list > :first-child,
.timeline-list > :first-child,
.document-list > :first-child,
.bibliography-list > :first-child,
.faq-list > :first-child {
    border-top: 0;
    padding-top: 0.35rem;
}

.log-date,
.timeline-date {
    margin: 0;
    color: var(--muted);
    font-size: 0.74rem;
}

.log-body h3,
.timeline-body h3,
.document-entry h3,
.bibliography-entry h3,
.archive-grid-item h3 {
    margin: 0;
    font-size: 1.08rem;
}

.entry-header {
    display: grid;
    gap: 0.35rem;
}

.entry-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    margin: 0;
    color: var(--muted);
    font-size: 0.7rem;
}

.entry-note {
    color: var(--muted);
    font-size: 0.74rem;
}

.document-entry,
.bibliography-entry {
    padding: 0.95rem 0;
    border-top: 1px solid var(--line);
}

.publication-authors {
    margin: 0.45rem 0 0;
    color: var(--ink);
}

.publication-venue {
    margin: 0.4rem 0 0;
    color: var(--accent);
    font-size: 0.9rem;
}

.publication-filter {
    margin: 0 0 0.8rem;
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.publication-filter a {
    color: var(--muted);
}

.publication-filter a.is-active {
    color: var(--accent);
    font-weight: 700;
}

.archive-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.archive-grid-item dt,
.archive-grid-item h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}

.archive-grid-item dd {
    margin: 0.45rem 0 0;
    color: var(--muted);
}

.name-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem 1.1rem;
    align-items: center;
}

.name-pill {
    white-space: nowrap;
    font-size: 1rem;
}

.bibliography-entry {
    border-left: 0;
}

.inline-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.55rem;
}

.inline-links a {
    padding: 0;
    border: 0;
    font-family: var(--mono);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.bibliography-entry.is-unpublished {
    display: none;
}

.timeline-list {
    display: grid;
    gap: 0.9rem;
}

.inline-link {
    display: inline-block;
    margin-top: 0.75rem;
    font-family: var(--mono);
    font-size: 0.78rem;
}

.contact-record {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    margin: 0;
}

.contact-record div {
    padding: 0.8rem 0;
    border-top: 1px solid var(--line);
    background: transparent;
}

.contact-record > :first-child {
    border-top: 0;
    padding-top: 0.2rem;
}

.contact-record dt {
    margin: 0 0 0.3rem;
    color: var(--muted);
    font-family: var(--mono);
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.07em;
}

.contact-record dd {
    margin: 0;
}

.faq-item {
    overflow: hidden;
    border-top: 1px solid var(--line);
}

.faq-question {
    width: 100%;
    padding: 0.9rem 1rem;
    border: 0;
    border-bottom: 1px solid transparent;
    background: transparent;
    color: var(--ink);
    text-align: left;
    font: inherit;
    font-size: 1rem;
    cursor: pointer;
}

.faq-question:hover {
    background: rgba(23, 63, 53, 0.04);
}

.faq-answer {
    display: none;
    padding: 0 1rem 1rem;
}

.faq-item.is-open .faq-question {
    border-bottom-color: var(--line);
}

.faq-item.is-open .faq-answer {
    display: block;
}

.error-record {
    max-width: 38rem;
    padding: 0.75rem 0;
    border-top: 1px solid var(--line);
}

.values-list {
    display: grid;
    gap: 0.55rem;
    max-width: 54rem;
}

.values-list p {
    margin: 0;
}

.intro-section-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 1rem;
    align-items: center;
}

.intro-copy {
    min-width: 0;
}

.intro-figure {
    margin: 0;
    height: auto;
    display: flex;
    align-items: center;
}

.intro-figure img {
    width: 100%;
    height: auto;
    max-height: 240px;
    object-fit: contain;
}

.empty-note {
    margin: 0.3rem 0 0;
    color: var(--muted);
}

.admin-layout .site-shell {
    max-width: none;
}

@media (max-width: 1100px) {
    .site-frame {
        grid-template-columns: 1fr;
    }

    .site-sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .portal-hero {
        display: block;
    }
}

@media (max-width: 780px) {
    .site-shell {
        padding: 0.75rem;
    }

    .site-main,
    .site-sidebar,
    .site-header {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .portal-index,
    .archive-grid,
    .contact-record {
        grid-template-columns: 1fr;
    }

    .intro-section-layout {
        grid-template-columns: 1fr;
    }

    .intro-figure {
        max-width: 220px;
    }

    .log-entry,
    .timeline-entry {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .site-footer {
        flex-direction: column;
    }
}

@media (max-width: 520px) {
    html {
        font-size: 15px;
    }

    .top-nav-list {
        gap: 0.3rem 0.8rem;
    }

    .top-nav {
        align-items: flex-start;
    }

    .language-switch {
        width: 100%;
        margin-left: 0;
    }

    .portal-title {
        font-size: 2.4rem;
    }
}