:root {
    --color-primary: #185FA5;
    --color-text: #2C2C2A;
    --color-text-secondary: #5F5E5A;
    --color-bg: #ffffff;
    --color-bg-secondary: #F1EFE8;
    --color-border: #B4B2A9;
    --border-radius: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    font-size: 15px;
}

em { font-style: normal; color: var(--color-primary); }

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
}
.site-header .container {
    display: flex;
    align-items: center;
    gap: 12px;
}
.logo {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
}
.slogan {
    color: var(--color-text-secondary);
    font-size: 13px;
}
.nav {
    margin-left: auto;
    display: flex;
    gap: 24px;
}
.nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
}
.nav a:hover, .nav a.active {
    color: var(--color-primary);
}

/* Hero */
.hero {
    padding: 60px 0 40px;
    text-align: center;
}
.hero-subtitle {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 16px;
}
.hero-desc {
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Analysis panel */
.analysis-panel {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.analysis-panel h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 24px;
}
.panel-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}
.panel-card {
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
}
.panel-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.panel-card strong {
    display: block;
    font-size: 20px;
    margin-bottom: 4px;
}
.panel-note {
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* Steps */
.how-it-works {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.how-it-works h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 24px;
}
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.step {
    text-align: center;
}
.step-num {
    display: block;
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.step h3 {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
}
.step p {
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* Draw board */
.draw-board {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.draw-board h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 8px;
}
.section-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}
#draw-data {
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    min-height: 200px;
}
.draw-row {
    display: grid;
    grid-template-columns: 1fr 1fr 80px 80px 80px 1fr;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
    align-items: center;
}
.draw-row:last-child { border-bottom: none; }
.draw-header {
    font-weight: 500;
    color: var(--color-text-secondary);
    font-size: 12px;
}

/* Content sections */
.content-sections {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.content-sections h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 24px;
}
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.category-card {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
}
.category-card h3 {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 4px;
}
.category-card h3 a {
    color: var(--color-text);
    text-decoration: none;
}
.cat-subtitle {
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}
.cat-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}
.article-list {
    list-style: none;
    margin-bottom: 16px;
}
.article-list li {
    padding: 6px 0;
    font-size: 13px;
}
.article-list li a {
    color: var(--color-text);
    text-decoration: none;
}
.article-list li a:hover {
    color: var(--color-primary);
}
.read-time {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-left: 8px;
}
.more-link {
    font-size: 13px;
    color: var(--color-primary);
    text-decoration: none;
}

/* Category page */
.category-page {
    padding: 40px 0;
}
.page-subtitle {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}
.category-page h1 {
    font-size: 28px;
    font-weight: 500;
    margin-bottom: 12px;
}
.category-desc {
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 600px;
}
.article-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.article-card {
    display: flex;
    gap: 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 24px;
}
.card-num {
    font-size: 28px;
    color: var(--color-primary);
    font-weight: 500;
    min-width: 40px;
}
.card-meta {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin-bottom: 4px;
}
.card-body h2 {
    font-size: 17px;
    font-weight: 500;
    margin-bottom: 8px;
}
.card-body h2 a {
    color: var(--color-text);
    text-decoration: none;
}
.card-body h2 a:hover {
    color: var(--color-primary);
}
.card-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}
.read-more {
    font-size: 13px;
    color: var(--color-primary);
    text-decoration: none;
}

/* Article page */
.article-page {
    padding: 40px 0;
    max-width: 760px;
}
.breadcrumb {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
}
.breadcrumb a:hover {
    color: var(--color-primary);
}
.article-page h1 {
    font-size: 26px;
    font-weight: 500;
    margin-bottom: 12px;
    line-height: 1.4;
}
.article-summary {
    color: var(--color-text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}
.article-content {
    font-size: 15px;
    line-height: 1.8;
}
.article-content h2 {
    font-size: 18px;
    font-weight: 500;
    margin: 28px 0 12px;
}
.article-content h3 {
    font-size: 16px;
    font-weight: 500;
    margin: 20px 0 8px;
}
.article-content p {
    margin-bottom: 14px;
}
.article-content ul, .article-content ol {
    margin: 0 0 14px 20px;
}
.article-content li {
    margin-bottom: 6px;
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
    font-size: 14px;
}
.article-content th, .article-content td {
    border: 1px solid var(--color-border);
    padding: 8px 12px;
    text-align: left;
}
.article-content th {
    background: var(--color-bg-secondary);
    font-weight: 500;
}
.notice {
    background: var(--color-bg-secondary);
    border-left: 3px solid var(--color-primary);
    padding: 16px 20px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin: 24px 0;
}
.notice h3 {
    margin-top: 0;
    color: var(--color-primary);
}
.article-nav {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.back-to-cat {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 60px;
}
.site-footer a {
    color: var(--color-text-secondary);
    text-decoration: none;
}

/* Mobile */
@media (max-width: 768px) {
    .panel-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: 1fr; }
    .category-grid { grid-template-columns: 1fr; }
    .nav { gap: 12px; flex-wrap: wrap; }
    .hero h1 { font-size: 24px; }
    .draw-row { grid-template-columns: 1fr 1fr; font-size: 12px; }
    .related-grid { grid-template-columns: 1fr; }
    .latest-grid { grid-template-columns: 1fr; }
    .prev-next { flex-direction: column; }
}

/* === 相关文章 / 上下篇 / 最新内容 / 404 === */

/* 文章页：上一篇/下一篇 */
.prev-next {
    display: flex;
    gap: 16px;
    margin: 32px 0 24px;
}
.prev-link, .next-link {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color .15s;
}
.prev-link:hover, .next-link:hover { border-color: var(--color-primary); }
.next-link { text-align: right; align-items: flex-end; }
.prev-link.placeholder, .next-link.placeholder {
    border: 1px dashed var(--color-border);
    background: transparent;
}
.pn-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    letter-spacing: 1px;
}
.pn-title {
    font-size: 14px;
    font-weight: 500;
}

/* 文章页：相关文章 */
.related-articles {
    margin: 32px 0;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}
.related-articles h2 {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.related-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: border-color .15s, transform .15s;
}
.related-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-1px);
}
.related-cat {
    font-size: 11px;
    color: var(--color-text-secondary);
    letter-spacing: 1px;
}
.related-card h3 {
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
    margin: 0;
}
.related-time {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: auto;
}

/* 首页：最新内容 */
.latest-section {
    padding: 40px 0;
    border-top: 1px solid var(--color-border);
}
.latest-section h2 {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 24px;
}
.latest-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.latest-card {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--color-text);
    transition: border-color .15s, transform .15s;
}
.latest-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}
.latest-cat {
    font-size: 11px;
    color: var(--color-primary);
    letter-spacing: 1px;
}
.latest-card h3 {
    font-size: 15px;
    font-weight: 500;
    line-height: 1.4;
    margin: 0;
}
.latest-desc {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin: 0;
}
.latest-time {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: auto;
}

/* 404 页 */
.not-found-page {
    padding: 60px 0 40px;
    max-width: 760px;
    text-align: center;
}
.not-found-page h1 {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 16px;
}
.not-found-desc {
    color: var(--color-text-secondary);
    margin-bottom: 24px;
}
.not-found-page .related-articles {
    text-align: left;
    margin-top: 40px;
}

/* 文章正文内链 */
.article-content a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--color-primary);
}
.article-content a:hover {
    opacity: .8;
}