/* ============================================
   网安日报速递 - 公共样式表
   AI城 · CYBERSECURITY DAILY EXPRESS
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400&display=swap');

:root {
    --ink-black: #1a1a1a;
    --ink-dark: #2d2d2d;
    --paper-cream: #f5f0e8;
    --paper-aged: #e8e0d0;
    --accent-red: #c41e3a;
    --accent-orange: #e85d04;
    --accent-gold: #c9a227;
    --border-dark: #3d3d3d;
    --border-light: #b8b0a0;
    --shadow-dark: rgba(0,0,0,0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--ink-black);
    font-family: 'Noto Serif SC', 'Georgia', serif;
    color: var(--ink-black);
    line-height: 1.8;
    padding: 20px;
}

.newspaper {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--paper-cream);
    box-shadow: 0 0 60px rgba(0,0,0,0.5), 0 0 120px rgba(0,0,0,0.3);
    border: 3px solid var(--border-dark);
    position: relative;
    overflow: hidden;
}

.newspaper::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse at 10% 10%, rgba(139,90,43,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 90% 90%, rgba(139,90,43,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(0,0,0,0.02) 0%, transparent 70%);
    pointer-events: none;
    z-index: 1;
}

/* --- Masthead --- */
.masthead {
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 30px 40px 20px;
    text-align: center;
    border-bottom: 4px double var(--accent-gold);
    position: relative;
}
.masthead::after {
    content: '';
    position: absolute;
    bottom: -8px; left: 0; right: 0;
    height: 2px;
    background: var(--accent-red);
}
.masthead a {
    color: inherit;
    text-decoration: none;
}
.newspaper-title {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: 3.5em;
    font-weight: 900;
    letter-spacing: 8px;
    text-transform: uppercase;
    margin: 10px 0;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    background: linear-gradient(180deg, #fff 0%, #d4c5a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.newspaper-subtitle {
    font-size: 1.2em;
    letter-spacing: 12px;
    color: var(--accent-gold);
    margin-bottom: 10px;
}

/* --- Edition Info --- */
.edition-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 40px;
    background: var(--paper-aged);
    border-bottom: 2px solid var(--border-light);
    font-size: 0.85em;
    color: var(--ink-dark);
}
.edition-date {
    font-weight: 700;
    color: var(--accent-red);
}
.edition-number {
    font-style: italic;
}

/* --- Keywords Banner --- */
.keywords-banner {
    background: linear-gradient(90deg, var(--accent-red), var(--accent-orange));
    color: white;
    padding: 12px 40px;
    font-size: 0.95em;
    letter-spacing: 2px;
}
.keywords-banner strong {
    margin-right: 10px;
}

/* --- Content --- */
.content-wrapper {
    padding: 30px 40px;
    position: relative;
    z-index: 2;
}

/* --- Headlines --- */
.headline-section {
    margin-bottom: 40px;
    border-bottom: 3px solid var(--ink-black);
    padding-bottom: 30px;
}
.main-headline {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: 2.8em;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 15px;
    color: var(--ink-black);
    border-left: 6px solid var(--accent-red);
    padding-left: 20px;
}
.sub-headline {
    font-size: 1.4em;
    color: var(--ink-dark);
    font-style: italic;
    margin-bottom: 20px;
    padding-left: 26px;
}

/* --- Article Grid --- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}
.article-card {
    border: 1px solid var(--border-light);
    padding: 25px;
    background: rgba(255,255,255,0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}
.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px var(--shadow-dark);
}
.article-card.featured {
    grid-column: span 2;
    border: 2px solid var(--accent-red);
    background: linear-gradient(135deg, rgba(196,30,58,0.05) 0%, rgba(255,255,255,0.8) 100%);
}
.article-number {
    position: absolute;
    top: -15px; left: 20px;
    background: var(--ink-black);
    color: var(--accent-gold);
    width: 35px; height: 35px;
    display: flex; align-items: center; justify-content: center;
    font-weight: 900; font-size: 1.1em;
    border-radius: 50%;
}

/* --- Badges --- */
.severity-badge {
    display: inline-block;
    padding: 3px 12px;
    font-size: 0.75em;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 10px;
    text-transform: uppercase;
}
.severity-critical { background: var(--accent-red); color: white; }
.severity-high { background: var(--accent-orange); color: white; }
.severity-medium { background: var(--accent-gold); color: var(--ink-black); }

.article-title {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: 1.5em;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 12px;
    color: var(--ink-black);
}
.article-meta {
    font-size: 0.85em;
    color: var(--ink-dark);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-light);
}
.cvss-score {
    display: inline-block;
    background: var(--ink-black);
    color: var(--accent-red);
    padding: 2px 10px;
    font-weight: 700;
    font-size: 0.9em;
    margin-left: 10px;
}
.article-body {
    font-size: 0.95em;
    line-height: 1.9;
    color: var(--ink-dark);
}
.article-body p {
    margin-bottom: 12px;
    text-indent: 2em;
}
.article-body ul, .article-body ol {
    margin: 10px 0;
    padding-left: 2em;
}
.article-body li {
    margin-bottom: 5px;
}

/* --- Section Headers --- */
.section-header {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: 1.8em;
    font-weight: 700;
    color: var(--ink-black);
    border-bottom: 3px solid var(--ink-black);
    padding-bottom: 10px;
    margin: 40px 0 25px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.section-header::before {
    content: '\00A7';
    color: var(--accent-red);
    font-size: 1.2em;
}

/* --- Quick News --- */
.quick-news {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}
.quick-item {
    padding: 20px;
    border-left: 4px solid var(--accent-orange);
    background: rgba(232,93,4,0.05);
}
.quick-item h4 {
    font-size: 1.1em;
    margin-bottom: 8px;
    color: var(--ink-black);
}
.quick-item p {
    font-size: 0.9em;
    color: var(--ink-dark);
}

/* --- Charts --- */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}
.chart-container {
    border: 1px solid var(--border-light);
    padding: 20px;
    background: white;
    text-align: center;
}
.chart-title {
    font-weight: 700;
    margin-bottom: 15px;
    font-size: 1.1em;
    color: var(--ink-black);
}
.mermaid {
    display: flex;
    justify-content: center;
}

/* --- Attack Flow --- */
.attack-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
    padding: 20px;
    background: rgba(0,0,0,0.03);
    border-radius: 4px;
}
.flow-step {
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 8px 16px;
    font-size: 0.85em;
    position: relative;
}
.flow-step::after {
    content: '\2192';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-red);
    font-weight: 700;
}
.flow-step:last-child::after {
    display: none;
}
.flow-step.critical {
    background: var(--accent-red);
}

/* --- Tables --- */
.affected-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}
.affected-table th {
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 10px;
    text-align: left;
}
.affected-table td {
    padding: 10px;
    border-bottom: 1px solid var(--border-light);
}
.affected-table tr:hover {
    background: rgba(232,93,4,0.05);
}
.risk-high { color: var(--accent-red); font-weight: 700; }
.risk-medium { color: var(--accent-orange); font-weight: 700; }

/* --- References --- */
.references-section {
    background: var(--paper-aged);
    padding: 30px;
    margin-top: 40px;
    border-top: 4px double var(--ink-black);
}
.references-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}
.reference-item {
    font-size: 0.8em;
    padding: 10px;
    background: white;
    border: 1px solid var(--border-light);
}
.reference-item a {
    color: var(--accent-red);
    text-decoration: none;
    word-break: break-all;
}
.reference-item a:hover {
    text-decoration: underline;
}
.reference-source {
    font-weight: 700;
    color: var(--ink-dark);
    display: block;
    margin-bottom: 5px;
}

/* --- Footer --- */
.newspaper-footer {
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 30px 40px;
    text-align: center;
    border-top: 4px double var(--accent-gold);
}
.footer-logo {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: 1.5em;
    font-weight: 700;
    margin-bottom: 10px;
}
.footer-disclaimer {
    font-size: 0.85em;
    color: rgba(245,240,232,0.7);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- Index Page Specific --- */
.index-hero {
    background: var(--ink-black);
    color: var(--paper-cream);
    padding: 60px 40px 40px;
    text-align: center;
    border-bottom: 4px double var(--accent-gold);
    position: relative;
}
.index-hero::after {
    content: '';
    position: absolute;
    bottom: -8px; left: 0; right: 0;
    height: 2px;
    background: var(--accent-red);
}
.index-hero .newspaper-title {
    margin-bottom: 15px;
}
.index-hero p {
    color: rgba(245,240,232,0.8);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1em;
}
.latest-badge {
    display: inline-block;
    background: var(--accent-red);
    color: white;
    padding: 4px 16px;
    font-size: 0.8em;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-transform: uppercase;
}
.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 30px 40px;
    position: relative;
    z-index: 2;
}
.archive-card {
    border: 1px solid var(--border-light);
    padding: 20px;
    background: rgba(255,255,255,0.5);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    text-decoration: none;
    color: var(--ink-black);
    display: block;
    position: relative;
}
.archive-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow-dark);
    border-color: var(--accent-red);
}
.archive-card.latest {
    border: 2px solid var(--accent-red);
    background: linear-gradient(135deg, rgba(196,30,58,0.05) 0%, rgba(255,255,255,0.8) 100%);
}
.archive-card .card-date {
    font-weight: 700;
    color: var(--accent-red);
    font-size: 1.1em;
    margin-bottom: 8px;
}
.archive-card .card-keywords {
    font-size: 0.85em;
    color: var(--ink-dark);
    line-height: 1.5;
}
.archive-card .card-tag {
    position: absolute;
    top: -10px; right: 15px;
    background: var(--accent-red);
    color: white;
    padding: 2px 10px;
    font-size: 0.7em;
    font-weight: 700;
    letter-spacing: 1px;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 0 40px 30px;
    position: relative;
    z-index: 2;
}
.pagination-info {
    font-size: 0.85em;
    color: var(--ink-dark);
    margin-right: 10px;
    font-style: italic;
}
.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-light);
    background: rgba(255,255,255,0.5);
    color: var(--ink-black);
    font-family: 'Noto Serif SC', 'Georgia', serif;
    font-size: 0.9em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    user-select: none;
}
.page-btn:hover {
    background: var(--ink-black);
    color: var(--paper-cream);
    border-color: var(--ink-black);
}
.page-btn.active {
    background: var(--accent-red);
    color: white;
    border-color: var(--accent-red);
    cursor: default;
}
.page-btn.disabled {
    opacity: 0.35;
    cursor: not-allowed;
    pointer-events: none;
}
.page-btn svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}
.nav-back {
    display: inline-block;
    padding: 10px 20px;
    background: var(--ink-black);
    color: var(--paper-cream);
    text-decoration: none;
    font-size: 0.9em;
    margin: 20px 40px;
    position: relative;
    z-index: 2;
}
.nav-back:hover {
    background: var(--accent-red);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .article-card.featured { grid-column: span 2; }
}
@media (max-width: 768px) {
    body { padding: 10px; }
    .newspaper-title { font-size: 2em; letter-spacing: 4px; }
    .main-headline { font-size: 1.8em; }
    .articles-grid { grid-template-columns: 1fr; }
    .article-card.featured { grid-column: span 1; }
    .quick-news { grid-template-columns: 1fr; }
    .charts-grid { grid-template-columns: 1fr; }
    .references-grid { grid-template-columns: 1fr; }
    .edition-info { flex-direction: column; gap: 10px; }
    .archive-grid { padding: 20px; grid-template-columns: 1fr; }
    .content-wrapper { padding: 20px; }
    .masthead { padding: 20px; }
}

/* --- Print --- */
@media print {
    body { background: white; padding: 0; }
    .newspaper { box-shadow: none; border: none; }
    .article-card:hover { transform: none; box-shadow: none; }
    .nav-back { display: none; }
}