/* ========================================
   Retro Newspaper Theme - REDESIGNED
   Classic broadsheet layout
   Old Standard TT + Lora + Source Serif 4
   ======================================== */

:root {
    --paper: #f5f0e1;
    --paper-alt: #ede8d6;
    --ink: #1a1a1a;
    --ink-dim: #4a4538;
    --ink-muted: #7a7464;
    --red: #8b0000;
    --rule: #1a1a1a;
    --rule-light: #c4bda8;
    /* 衬线系统栈：优先用报纸体（若本机有），否则回退 Georgia / 中文衬线（宋体）。
       不再依赖 Google Fonts CDN — 国内加载稳定。 */
    --font-display: 'Old Standard TT', Georgia, 'Times New Roman', 'Songti SC', 'STSong', 'Noto Serif CJK SC', serif;
    --font-sub: 'Lora', Georgia, 'Songti SC', 'STSong', serif;
    --font-body: 'Source Serif 4', Georgia, 'Songti SC', 'STSong', 'Noto Serif CJK SC', serif;
}
/* ---- Global Resets ---- */
* { -webkit-tap-highlight-color: transparent; }
[data-theme="dark"] { color-scheme: dark; }
[data-theme="light"] { color-scheme: light; }
::selection { background: var(--red); color: #fff; }


[data-theme="dark"] {
    --paper: #1a1815;
    --paper-alt: #22201b;
    --ink: #d4cfc0;
    --ink-dim: #b0a990;
    --ink-muted: #8a8370;
    --red: #c05050;
    --rule: #5a5445;
    --rule-light: #3d3930;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--paper-alt);
    color: var(--ink);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    padding: 24px;
}

a { color: var(--red); text-decoration: none; }
a:hover { text-decoration: underline; }
em { color: var(--red); font-style: italic; }
strong { color: var(--ink); }

/* ---- Broadsheet Container ---- */

.broadsheet {
    width: 100%;
    max-width: 960px;
    background: var(--paper);
    padding: 32px 40px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.15);
}

/* ---- Masthead ---- */

.masthead { text-align: center; margin-bottom: 24px; }

.masthead-rule {
    height: 3px;
    background: var(--rule);
    margin: 8px 0;
}

.masthead-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    line-height: 1.1;
    text-align: center;
    padding: 8px 0;
    color: var(--ink);
}

.edition-btn {
    font-family: var(--font-sub);
    font-size: 0.7rem;
    background: none;
    border: 1px solid var(--rule-light);
    color: var(--ink-muted);
    padding: 3px 10px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.edition-btn:hover { border-color: var(--red); color: var(--red); }

/* ---- Section Nav ---- */

.section-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    padding: 8px 0;
    font-family: var(--font-sub);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
}

.section-toggle { position: absolute; right: 0; }

.section-nav a { color: var(--ink-dim); }
.section-nav a:hover { color: var(--red); text-decoration: none; }
.nav-dot { color: var(--ink-muted); }

/* ---- Rules ---- */

.section-rule {
    height: 1px;
    background: var(--rule-light);
    margin: 0;
}

/* ---- Front Page ---- */

.hero-photo {
    width: 135px;
    height: 135px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--rule);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--paper-alt);
    margin: 0 auto 12px;
    flex-shrink: 0;
}

.hero-photo svg {
    width: 36px;
    height: 36px;
    color: var(--ink-muted);
    opacity: 0.4;
}

.hero-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.front-columns {
    display: grid;
    grid-template-columns: 190px 1fr 200px;
    gap: 24px;
}

.col-photo {
    display: flex;
    flex-direction: column;
    align-items: center;
    border-right: 1px solid var(--rule-light);
    padding-right: 24px;
}

.photo-info {
    margin-top: 10px;
    text-align: center;
    width: 100%;
}

.photo-name {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 2px;
}

.photo-role {
    font-size: 0.75rem;
    font-style: italic;
    color: var(--ink-dim);
    margin-bottom: 1px;
}

.photo-place {
    font-size: 0.72rem;
    color: var(--ink-muted);
    margin-bottom: 8px;
}

.photo-contact {
    border-top: 1px solid var(--rule-light);
    padding-top: 8px;
    font-size: 0.7rem;
    color: var(--ink-muted);
    line-height: 1.8;
}

.col-main {
    border-right: 1px solid var(--rule-light);
    padding-right: 24px;
    font-size: 0.92rem;
    text-align: justify;
    hyphens: auto;
}

.col-main p { margin-bottom: 12px; }

/* ---- Sidebar Boxes ---- */

.col-side {
    display: flex;
    flex-direction: column;
}

.col-side .sidebar-box {
    flex: 1;
}

.sidebar-box {
    border: 1px solid var(--rule);
    padding: 12px;
    margin-bottom: 16px;
}

.sidebar-title {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    border-bottom: 1px solid var(--rule-light);
    padding-bottom: 6px;
    margin-bottom: 8px;
}

.sidebar-stat {
    font-size: 0.8rem;
    color: var(--ink-dim);
    padding: 2px 0;
}

.stat-num {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--red);
    margin-right: 4px;
}

/* ---- Section Banner ---- */

.paper-section { padding: 20px 0; }

.section-banner {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    text-align: center;
    padding: 6px 0;
    border-top: 2px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    margin-bottom: 16px;
}

/* ---- Articles (Publications) ---- */

.articles-columns {
    column-count: 2;
    column-gap: 24px;
    column-rule: 1px solid var(--rule-light);
}

.news-article {
    break-inside: avoid;
    margin-bottom: 20px;
}

.article-headline {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 4px;
}

.article-byline {
    font-size: 0.8rem;
    color: var(--ink-dim);
    font-style: italic;
    margin-bottom: 2px;
}

.article-source {
    font-family: var(--font-sub);
    font-size: 0.7rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
}

.article-body {
    font-size: 0.88rem;
    text-align: justify;
    hyphens: auto;
    margin-bottom: 6px;
}

.article-links {
    font-size: 0.75rem;
    font-family: var(--font-sub);
}

.article-links a { margin-right: 8px; }

/* ---- Classifieds (Projects) ---- */

.classifieds {
    column-count: 2;
    column-gap: 20px;
    column-rule: 1px solid var(--rule-light);
}

.classified-ad {
    break-inside: avoid;
    border: 1px solid var(--rule-light);
    padding: 10px;
    margin-bottom: 12px;
}

.ad-title {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.ad-body {
    font-size: 0.82rem;
    color: var(--ink-dim);
    margin-bottom: 4px;
}

.ad-tags {
    font-size: 0.7rem;
    color: var(--ink-muted);
    font-style: italic;
}

/* ---- Bulletin (News) ---- */

.bulletin-item {
    display: flex;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--rule-light);
    align-items: baseline;
    font-size: 0.88rem;
}

.bulletin-date {
    font-family: var(--font-sub);
    font-size: 0.75rem;
    color: var(--ink-muted);
    min-width: 90px;
    flex-shrink: 0;
}

.bulletin-badge {
    font-family: var(--font-sub);
    font-size: 0.6rem;
    font-weight: 700;
    background: var(--red);
    color: var(--paper);
    padding: 1px 6px;
    letter-spacing: 0.08em;
    flex-shrink: 0;
}

.bulletin-text { color: var(--ink-dim); }

/* ---- Career (Experience) ---- */

.career-block { margin-bottom: 16px; }

.career-cat {
    font-family: var(--font-display);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--red);
    border-bottom: 1px solid var(--rule-light);
    padding-bottom: 4px;
    margin-bottom: 8px;
}

.career-entry {
    padding: 6px 0;
    border-bottom: 1px dotted var(--rule-light);
    font-size: 0.85rem;
}

.career-period {
    font-size: 0.75rem;
    color: var(--ink-muted);
    display: block;
}

.career-place {
    font-size: 0.8rem;
    color: var(--ink-dim);
    font-style: italic;
    display: block;
}

/* ---- Letters (Contact) ---- */

.letters-box {
    text-align: center;
    border: 1px solid var(--rule);
    padding: 20px;
    max-width: 500px;
    margin: 0 auto;
}

.letters-text {
    font-size: 0.88rem;
    color: var(--ink-dim);
    font-style: italic;
    margin-bottom: 8px;
}

.letters-email {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--red);
}

.letters-addr {
    font-size: 0.75rem;
    color: var(--ink-muted);
    margin-top: 4px;
}

/* ---- Footer ---- */

.paper-footer {
    text-align: center;
    padding: 16px 0 0;
    font-family: var(--font-sub);
    font-size: 0.7rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-rule {
    height: 2px;
    background: var(--rule);
    margin-bottom: 12px;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
    body { padding: 8px; }
    .broadsheet { padding: 16px; }
    .section-nav { flex-wrap: wrap; justify-content: center; }
    .front-columns { grid-template-columns: 1fr; }
    .col-photo { border-right: none; padding-right: 0; }
    .col-main { border-right: none; padding-right: 0; }
    .articles-columns { column-count: 1; }
    .classifieds { column-count: 1; }
    .bulletin-item { flex-wrap: wrap; }
}

@media (max-width: 375px) {
    body { padding: 4px; }
    .broadsheet { padding: 12px; }
    .masthead-title { font-size: 1.6rem; }
    .lead-para { font-size: 0.85rem; }
    .sidebar-box { padding: 12px; }
    .news-article { padding: 16px 0; }
    .career-entry { flex-direction: column; gap: 4px; }
}

/* ---- Focus Styles ---- */
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; border-radius: 2px; }

/* ---- Skip Link ---- */
.skip-link { position: absolute; top: -40px; left: 0; background: var(--red); color: #fff; padding: 8px 16px; z-index: 9999; font-size: 0.875rem; transition: top 0.2s; }
.skip-link:focus { top: 0; }

/* ════════ Custom additions (Jianming Long) ════════ */

/* 报头日期/版名行 */
.masthead-meta {
    font-family: var(--font-sub);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-muted);
    text-align: center;
    padding: 6px 0 2px;
}

/* 头版右侧 RESEARCH 边栏的研究方向列表 */
.sidebar-areas {
    list-style: none;
    margin: 0;
    padding: 0;
}
.sidebar-areas li {
    font-size: 0.8rem;
    color: var(--ink-dim);
    padding: 4px 0 4px 0.9rem;
    position: relative;
    line-height: 1.35;
    border-bottom: 1px dotted var(--rule-light);
}
.sidebar-areas li:last-child { border-bottom: none; }
.sidebar-areas li::before {
    content: "§";
    position: absolute;
    left: 0;
    color: var(--red);
    font-family: var(--font-display);
    font-weight: 700;
}