:root {
    --bg-base: #f5f7fb;
    --bg-surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --border-light: #e2e8f0;
    --border-focus: #cbd5e1;
    --brand-primary: #1e40af;
    --brand-hover: #1e3a8a;
    --brand-light: #eff6ff;
    --danger-bg: #fef2f2;
    --danger-border: #dc2626;
    --danger-text: #991b1b;
    --success-text: #166534;
    --success-bg: #e6f7ec;
}

html, body {
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-base);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
}

/* 核心容器布局 */
.page-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 32px 0 64px 0;
    box-sizing: border-box;
}

/* 模块基础 */
.section-block {
    background: var(--bg-surface);
    border-radius: 12px;
    margin-bottom: 24px;
    padding: 32px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-light);
}

/* 层级标题排版 */
.page-title {
    font-size: 1.875rem;
    font-weight: 800;
    line-height: 1.3;
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 32px 0 16px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border-light);
    color: var(--text-primary);
}

.sub-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 24px 0 12px 0;
    color: var(--text-primary);
}

/* 面包屑与元数据 */
.breadcrumb-nav {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.breadcrumb-nav a {
    color: var(--text-secondary);
    text-decoration: none;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 24px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.meta-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.status-highlight {
    background: var(--success-bg);
    color: var(--success-text);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
}

/* 利益披露 */
.disclosure-box {
    background: var(--bg-base);
    border-left: 4px solid var(--text-muted);
    padding: 12px 16px;
    margin-bottom: 24px;
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.disclosure-box a {
    color: var(--brand-primary);
    text-decoration: none;
}

/* 紧急提醒 */
.alert-box {
    background-color: var(--danger-bg);
    border-left: 4px solid var(--danger-border);
    padding: 20px;
    margin-bottom: 32px;
    border-radius: 0 8px 8px 0;
}

.alert-title {
    color: var(--danger-text);
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0 0 8px 0;
}

.alert-box p {
    margin: 0 0 8px 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.alert-box p:last-child {
    margin: 0;
}

/* 表格与证据图 */
.table-scroll-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 24px 0;
    border: 1px solid var(--border-light);
    border-radius: 8px;
}

.table-scroll-container:focus-visible {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
    font-size: 0.9375rem;
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
}

.data-table th {
    background-color: var(--bg-base);
    font-weight: 600;
    white-space: nowrap;
}

.data-table caption {
    caption-side: bottom;
    text-align: right;
    font-size: 0.8125rem;
    color: var(--text-muted);
    padding: 8px 16px;
    background: var(--bg-base);
}

.evidence-figure {
    margin: 24px 0;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 8px;
    background: var(--bg-surface);
}

.evidence-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.evidence-caption {
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 8px;
}

/* 方法论卡片 */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 24px 0;
}

.metric-card {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 20px;
}

.metric-card h3 {
    font-size: 1.0625rem;
    margin: 0 0 12px 0;
    color: var(--text-primary);
}

.metric-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* 平台推荐卡片 */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin: 24px 0;
}

.platform-card {
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 24px;
    background: var(--bg-surface);
    display: flex;
    flex-direction: column;
}

.platform-badge {
    align-self: flex-start;
    background: var(--brand-light);
    color: var(--brand-primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 16px;
}

.platform-card h3 {
    font-size: 1.375rem;
    margin: 0 0 12px 0;
}

.platform-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.platform-data {
    background: var(--bg-base);
    border-left: 3px solid #22c55e;
    padding: 12px;
    font-size: 0.875rem;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.platform-features {
    list-style: none;
    padding: 0;
    margin: 0 0 24px 0;
    flex-grow: 1;
}

.platform-features li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.platform-features li::before {
    content: "✓";
    color: #16a34a;
    position: absolute;
    left: 0;
    font-weight: bold;
}

.action-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    flex: 1;
    text-align: center;
    background: var(--brand-primary);
    color: #ffffff;
    padding: 10px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-focus);
}

/* 作者模块 */
.author-profile {
    display: flex;
    gap: 24px;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 24px;
    margin: 32px 0;
    align-items: flex-start;
    font-style: normal;
}

.author-media img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--bg-surface);
}

.author-info h3 {
    margin: 0 0 4px 0;
    font-size: 1.25rem;
}

.author-role {
    font-size: 0.875rem;
    color: var(--brand-primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.author-bio {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
}

.author-links a {
    font-size: 0.875rem;
    color: var(--brand-primary);
    text-decoration: none;
}

/* 原生折叠面板 (FAQ) */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 24px 0;
}

.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: 8px;
}

.faq-trigger {
    font-size: 1rem;
    font-weight: 600;
    padding: 16px;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
}

.faq-trigger::-webkit-details-marker {
    display: none;
}

.faq-trigger::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--text-muted);
}

.faq-item[open] .faq-trigger::after {
    content: '−';
}

.faq-content {
    padding: 0 16px 16px 16px;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin: 0;
}

/* 底部功能区 */
.compliance-footer {
    background: var(--bg-base);
    padding: 16px;
    border-top: 1px solid var(--border-light);
    text-align: center;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.compliance-footer a {
    color: var(--brand-primary);
    text-decoration: none;
}

/* =========================================
   移动端深度适配 (全宽突破主题限制，极简边框)
   ========================================= */
@media screen and (max-width: 768px) {
    .page-wrapper {
        width: 100vw;
        max-width: 100vw;
        margin-left: calc(-50vw + 50%);
        margin-right: calc(-50vw + 50%);
        padding: 16px 12px 32px 12px;
    }
    
    .section-block {
        background: transparent;
        border-radius: 0;
        padding: 0;
        margin-bottom: 24px;
        box-shadow: none;
        border: none;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .alert-box {
        border-radius: 4px;
        padding: 16px;
    }

    .platform-card {
        padding: 16px;
        border-radius: 8px;
    }

    .author-profile {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 16px;
    }

    .action-group {
        flex-direction: column;
    }

    .faq-container {
        gap: 12px;
    }

    .metric-card {
        padding: 16px;
    }
}