/* AI 科普 — shared styles for the section index and all articles. */

:root {
    --bg: #000;
    --fg: #33cc33;
    --fg-strong: #0f0;
    --fg-soft: #88ff88;
    --fg-mute: #557755;
    --line: rgba(0, 255, 0, 0.22);
    --panel: rgba(0, 24, 0, 0.85);
    --panel-soft: rgba(0, 16, 0, 0.6);
}

body, html {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    line-height: 1.7;
}

#matrixCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

/* ---- Navbar ---- */
.top-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    z-index: 100;
    background-color: rgba(0, 16, 0, 0.88);
    border-bottom: 1px solid #0a0;
    box-shadow: 0 0 12px rgba(0, 255, 0, 0.18);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    box-sizing: border-box;
    display: flex;
    align-items: center;
    padding: 0 24px;
}

.navbar-brand {
    color: var(--fg-strong);
    font-size: 20px;
    font-weight: bold;
    text-decoration: none;
    letter-spacing: 2px;
    text-shadow: 0 0 8px rgba(0, 255, 0, 0.7);
}

/* ---- Page wrapper ---- */
.page {
    position: relative;
    z-index: 1;
    max-width: 920px;
    margin: 0 auto;
    padding: 80px 24px 32px;
    box-sizing: border-box;
}

.page.wide { max-width: 1100px; }

/* ---- Hero (index page) ---- */
.hero {
    background-color: var(--panel);
    border: 1px solid #0a0;
    border-radius: 8px;
    box-shadow: 0 0 24px rgba(0, 255, 0, 0.18);
    padding: 28px 32px;
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.hero h1 {
    margin: 0 0 8px 0;
    color: var(--fg-strong);
    font-size: 28px;
    letter-spacing: 2px;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
}

.hero p {
    margin: 0;
    color: var(--fg-soft);
    font-size: 14px;
    line-height: 1.7;
}

/* ---- Card grid (index page) ---- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.card {
    background-color: var(--panel);
    border: 1px solid #0a0;
    border-radius: 8px;
    padding: 22px 24px;
    box-shadow: 0 0 16px rgba(0, 255, 0, 0.12);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
}

.card-tag {
    display: inline-block;
    padding: 2px 10px;
    border: 1px solid #0a0;
    border-radius: 999px;
    color: var(--fg-strong);
    font-size: 11px;
    letter-spacing: 1px;
    margin-bottom: 10px;
    align-self: flex-start;
    font-family: "Courier New", monospace;
}

.card h2 {
    margin: 0 0 12px 0;
    color: var(--fg-strong);
    font-size: 18px;
    letter-spacing: 1px;
    text-shadow: 0 0 8px rgba(0, 255, 0, 0.4);
}

.card p.lead {
    margin: 0 0 14px 0;
    color: var(--fg-soft);
    font-size: 13px;
    line-height: 1.6;
}

.card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.card li {
    border-top: 1px dashed var(--line);
    padding: 10px 0;
}

.card li:first-child { border-top: 0; padding-top: 4px; }

.card li a {
    color: var(--fg);
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
    line-height: 1.5;
    transition: color 0.2s ease;
}

.card li a:hover {
    color: var(--fg-strong);
    text-shadow: 0 0 6px rgba(0, 255, 0, 0.5);
}

.card li a .meta {
    color: var(--fg-mute);
    font-family: "Courier New", monospace;
    font-size: 11px;
    white-space: nowrap;
    flex-shrink: 0;
}

.card li .desc {
    display: block;
    color: var(--fg-mute);
    font-size: 12px;
    margin-top: 4px;
    line-height: 1.5;
}

/* ---- Article page ---- */
.article {
    background-color: var(--panel);
    border: 1px solid #0a0;
    border-radius: 8px;
    padding: 32px 36px;
    box-shadow: 0 0 24px rgba(0, 255, 0, 0.18);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.article .breadcrumb {
    font-size: 12px;
    color: var(--fg-mute);
    letter-spacing: 1px;
    margin-bottom: 12px;
    font-family: "Courier New", monospace;
}

.article .breadcrumb a {
    color: var(--fg);
    text-decoration: none;
}

.article .breadcrumb a:hover { color: var(--fg-strong); }

.article h1 {
    margin: 0 0 6px 0;
    color: var(--fg-strong);
    font-size: 26px;
    letter-spacing: 1px;
    text-shadow: 0 0 10px rgba(0, 255, 0, 0.5);
    line-height: 1.4;
}

.article .subtitle {
    margin: 0 0 24px 0;
    color: var(--fg-soft);
    font-size: 14px;
    line-height: 1.6;
    border-bottom: 1px dashed var(--line);
    padding-bottom: 20px;
}

.article h2 {
    margin: 28px 0 12px 0;
    color: var(--fg-strong);
    font-size: 18px;
    letter-spacing: 1px;
    text-shadow: 0 0 8px rgba(0, 255, 0, 0.4);
}

.article h3 {
    margin: 22px 0 8px 0;
    color: var(--fg);
    font-size: 15px;
    letter-spacing: 1px;
}

.article p {
    margin: 0 0 14px 0;
    color: var(--fg);
    font-size: 14.5px;
    line-height: 1.85;
}

.article ul, .article ol {
    margin: 0 0 16px 0;
    padding-left: 22px;
    color: var(--fg);
    font-size: 14.5px;
    line-height: 1.85;
}

.article li { margin-bottom: 4px; }

.article code {
    font-family: "Courier New", monospace;
    background-color: var(--panel-soft);
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 13px;
    color: var(--fg-strong);
}

.article pre {
    background-color: var(--panel-soft);
    border: 1px dashed var(--line);
    border-radius: 6px;
    padding: 14px 18px;
    margin: 0 0 16px 0;
    overflow-x: auto;
    line-height: 1.55;
}

.article pre code {
    background: none;
    padding: 0;
    font-size: 13px;
    color: var(--fg-strong);
}

.article blockquote {
    margin: 16px 0;
    padding: 10px 16px;
    border-left: 3px solid var(--fg-mute);
    background-color: var(--panel-soft);
    color: var(--fg-soft);
    font-size: 14px;
}

.article hr {
    border: none;
    border-top: 1px dashed var(--line);
    margin: 28px 0;
}

.article .meta-line {
    font-size: 12px;
    color: var(--fg-mute);
    font-family: "Courier New", monospace;
    margin-bottom: 16px;
}

.article .meta-line span { margin-right: 12px; }

.article .footer-nav {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px dashed var(--line);
    display: flex;
    justify-content: space-between;
    font-size: 13px;
}

.article .footer-nav a {
    color: var(--fg);
    text-decoration: none;
}

.article .footer-nav a:hover { color: var(--fg-strong); }

/* ---- Shared footer ---- */
.site-footer {
    margin-top: 28px;
    text-align: center;
    color: var(--fg-mute);
    font-size: 12px;
}

.site-footer a {
    color: var(--fg);
    text-decoration: none;
    margin: 0 8px;
}

.site-footer a:hover { color: var(--fg-strong); }

/* ---- Glossary table (kb/glossary) ---- */
.article .glossary {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 8px 0;
    font-size: 14px;
}

.article .glossary th,
.article .glossary td {
    padding: 10px 12px;
    border-bottom: 1px dashed var(--line);
    text-align: left;
    vertical-align: top;
}

.article .glossary thead th {
    color: var(--fg-strong);
    border-bottom: 2px solid #0a0;
    font-family: "Courier New", monospace;
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.article .glossary tbody tr:hover {
    background-color: var(--panel-soft);
}

.article .glossary .term-en {
    font-family: "Courier New", monospace;
    color: var(--fg-strong);
    white-space: nowrap;
    width: 28%;
}

.article .glossary .term-cn {
    color: var(--fg-soft);
    white-space: nowrap;
    width: 22%;
}

.article .glossary .term-desc {
    color: var(--fg);
    line-height: 1.7;
}

.article .glossary .letter-row td {
    background-color: var(--panel-soft);
    color: var(--fg-strong);
    font-family: "Courier New", monospace;
    font-size: 13px;
    letter-spacing: 2px;
    padding: 8px 12px;
    border-bottom: 1px solid #0a0;
}

/* ---- Responsive ---- */
@media (max-width: 720px) {
    .page { padding: 72px 14px 24px; }
    .hero { padding: 22px 18px; }
    .hero h1 { font-size: 22px; }
    .article { padding: 22px 18px; }
    .article h1 { font-size: 21px; }
    .article h2 { font-size: 16px; }
    .article p { font-size: 14px; }
    .article .glossary { display: block; overflow-x: auto; }
    .article .glossary th, .article .glossary td { padding: 8px 10px; }
}