/* 帮助中心 · 文章详情页统一样式 */

:root {
    --art-bg: #eef2f7;
    --art-surface: #ffffff;
    --art-text: #1e293b;
    --art-text-2: #475569;
    --art-muted: #64748b;
    --art-border: #e2e8f0;
    --art-accent: #2563eb;
    --art-accent-hover: #1d4ed8;
    --art-accent-soft: #eff6ff;
    --art-radius: 16px;
    --art-radius-sm: 10px;
    --art-shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 12px 32px rgba(15, 23, 42, 0.06);
    --art-content-width: 720px;
}

body.article-body {
    background: var(--art-bg);
    color: var(--art-text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── 页面容器 ── */
.article-page {
    padding: 96px 20px 72px;
}

.article-card {
    max-width: var(--art-content-width);
    margin: 0 auto;
    background: var(--art-surface);
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius);
    box-shadow: var(--art-shadow);
    overflow: hidden;
}

/* ── 文章头部 ── */
.article-header {
    padding: 36px 40px 28px;
    border-bottom: 1px solid var(--art-border);
    background: linear-gradient(180deg, #f8fafc 0%, #fff 60%);
}

.article-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--art-muted);
    margin-bottom: 20px;
    line-height: 1.5;
}

.article-breadcrumb a {
    color: var(--art-accent);
    text-decoration: none;
    transition: color 0.15s;
}

.article-breadcrumb a:hover {
    color: var(--art-accent-hover);
    text-decoration: underline;
}

.article-breadcrumb .sep {
    color: #cbd5e1;
    user-select: none;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.article-meta-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 11px;
    font-size: 12px;
    font-weight: 500;
    line-height: 1.4;
    border-radius: 999px;
    background: var(--art-accent-soft);
    color: #1e40af;
    letter-spacing: 0.01em;
}

.article-meta-badge.article-meta-date {
    background: #f1f5f9;
    color: var(--art-text-2);
}

.article-meta-badge.article-meta-cat {
    background: #ecfdf5;
    color: #047857;
}

.article-card h1 {
    font-size: clamp(1.625rem, 4.5vw, 2rem);
    line-height: 1.35;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    letter-spacing: -0.025em;
}

/* ── 正文区 ── */
.article-content {
    padding: 32px 40px 36px;
}

.lead {
    font-size: 1.0625rem;
    line-height: 1.85;
    color: var(--art-text-2);
    margin: 0 0 1.5rem;
    padding: 14px 0 14px 18px;
    border-left: 3px solid var(--art-accent);
    background: linear-gradient(90deg, var(--art-accent-soft) 0%, transparent 100%);
    border-radius: 0 var(--art-radius-sm) var(--art-radius-sm) 0;
}

.article-content h2 {
    font-size: 1.25rem;
    font-weight: 650;
    color: #0f172a;
    margin: 2.25rem 0 0.875rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #f1f5f9;
    position: relative;
    letter-spacing: -0.01em;
}

.article-content h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 40px;
    height: 2px;
    background: var(--art-accent);
    border-radius: 1px;
}

.article-content > h2:first-child {
    margin-top: 0;
}

.article-content p,
.article-content li {
    color: var(--art-text);
    line-height: 1.9;
    font-size: 16px;
}

.article-content p {
    margin: 0 0 1rem;
}

.article-content ul,
.article-content ol {
    padding-left: 1.35rem;
    margin: 0.5rem 0 1.25rem;
}

.article-content li {
    margin-bottom: 0.45rem;
}

.article-content li::marker {
    color: var(--art-accent);
}

.article-content a {
    color: var(--art-accent);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-color: rgba(37, 99, 235, 0.35);
    transition: color 0.15s, text-decoration-color 0.15s;
}

.article-content a:hover {
    color: var(--art-accent-hover);
    text-decoration-color: var(--art-accent-hover);
}

/* ── 图片 ── */
.figure-gallery {
    display: grid;
    gap: 20px 18px;
    margin: 2rem 0;
    padding: 22px 20px;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius);
}

.figure-gallery--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.figure-gallery--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.figure {
    margin: 2rem auto;
    text-align: center;
}

.figure-gallery .figure {
    margin: 0;
}

/* 单张图：独立展台（非画廊内） */
.article-content > .figure--phone,
.article-content > .figure--preview {
    padding: 20px 18px 16px;
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius);
}

.article-content > .figure--phone {
    max-width: 280px;
}

.article-content > .figure--preview {
    max-width: 100%;
}

.article-content > .figure--preview img {
    max-width: 440px;
}

.figure-gallery .figure--phone {
    max-width: none;
    padding: 0;
    background: none;
    border: none;
    border-radius: 0;
}

/* 手机截图：设备框 */
.figure--phone {
    max-width: 240px;
}

.figure-device {
    position: relative;
    display: inline-block;
    padding: 10px 8px 12px;
    background: linear-gradient(165deg, #3d4f66 0%, #0f172a 55%, #1e293b 100%);
    border-radius: 26px;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.12),
        0 4px 12px rgba(15, 23, 42, 0.12),
        0 20px 44px rgba(15, 23, 42, 0.18);
}

.figure-device::before {
    content: "";
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 4px;
    background: #64748b;
    border-radius: 99px;
    z-index: 2;
    opacity: 0.85;
}

.figure--phone img {
    display: block;
    width: 100%;
    max-width: 220px;
    height: auto;
    margin: 0 auto;
    border-radius: 16px;
    border: none;
    box-shadow: none;
    background: #000;
}

.figure-gallery .figure--phone img {
    max-width: 100%;
}

/* 产品预览 / 横图 */
.figure--preview {
    max-width: 100%;
    margin: 2rem 0;
}

.figure--preview img {
    display: block;
    width: 100%;
    max-width: 480px;
    height: auto;
    margin: 0 auto;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--art-border);
    background: linear-gradient(135deg, #f8fafc 0%, #eef2f7 100%);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

/* 普通横图 */
.figure--photo img {
    display: block;
    width: 100%;
    max-width: 520px;
    height: auto;
    margin: 0 auto;
    border-radius: 12px;
    border: 1px solid var(--art-border);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
    background: #fff;
}

.figure figcaption {
    font-size: 13px;
    color: var(--art-muted);
    margin-top: 12px;
    line-height: 1.65;
    padding: 0 4px;
}

.figure-gallery .figure figcaption {
    margin-top: 10px;
    font-size: 12px;
    line-height: 1.55;
}

/* 兼容未迁移的旧结构 */
.figure:not(.figure--phone):not(.figure--preview):not(.figure--photo) img {
    display: block;
    width: 100%;
    max-width: 280px;
    height: auto;
    margin: 0 auto;
    border-radius: 18px;
    border: 1px solid var(--art-border);
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06), 0 16px 40px rgba(15, 23, 42, 0.1);
    background: #0f172a;
}

.figure-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 1.75rem 0;
}

.figure-row .figure {
    margin: 0;
}

/* ── 提示框 ── */
.tip-box,
.risk-box {
    margin: 1.5rem 0;
    padding: 16px 18px;
    border-radius: var(--art-radius-sm);
    font-size: 15px;
    line-height: 1.75;
    border: 1px solid;
}

.tip-box {
    background: #f0f9ff;
    border-color: #bae6fd;
    border-left: 4px solid #0ea5e9;
    color: #0c4a6e;
}

.tip-box a {
    color: #0369a1;
    font-weight: 500;
}

.risk-box {
    background: #fffbeb;
    border-color: #fde68a;
    border-left: 4px solid #f59e0b;
    color: #78350f;
}

.risk-box a {
    color: #b45309;
}

.figure-gallery + .source-note {
    margin-top: -0.5rem;
    margin-bottom: 1.5rem;
    border-top: none;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    background: #f1f5f9;
}

.checklist {
    margin: 1rem 0;
    padding: 14px 18px;
    background: #f8fafc;
    border: 1px solid var(--art-border);
    border-left: 4px solid #94a3b8;
    border-radius: var(--art-radius-sm);
    font-size: 15px;
    line-height: 1.75;
    color: var(--art-text);
}

.checklist p {
    margin: 0;
}

.article-content strong {
    color: #0f172a;
    font-weight: 600;
}

/* ── 表格 ── */
.table-wrap {
    margin: 1.25rem 0;
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}

table {
    width: 100%;
    min-width: 320px;
    border-collapse: collapse;
    background: #fff;
}

th {
    background: #f8fafc;
    color: #0f172a;
    font-weight: 600;
    font-size: 13px;
    text-transform: none;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

th,
td {
    padding: 11px 16px;
    text-align: left;
    border-bottom: 1px solid var(--art-border);
    font-size: 14px;
    line-height: 1.6;
    color: var(--art-text);
}

tbody tr:last-child td {
    border-bottom: 0;
}

tbody tr:nth-child(even) {
    background: #fafbfc;
}

tbody tr:hover {
    background: #f1f5f9;
}

/* ── FAQ ── */
.faq {
    margin: 1rem 0 0;
}

.faq dt {
    font-weight: 600;
    font-size: 15px;
    color: #0f172a;
    margin: 14px 0 0;
    padding: 13px 16px;
    background: #f8fafc;
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius-sm) var(--art-radius-sm) 0 0;
}

.faq dt:first-child {
    margin-top: 0;
}

.faq dd {
    margin: 0 0 4px;
    padding: 12px 16px 14px;
    background: #fff;
    border: 1px solid var(--art-border);
    border-top: 0;
    border-radius: 0 0 var(--art-radius-sm) var(--art-radius-sm);
    color: var(--art-text-2);
    font-size: 15px;
    line-height: 1.75;
}

.faq dd a {
    color: var(--art-accent);
}

/* ── 相关阅读 ── */
.related-reading {
    padding: 28px 40px 32px;
    border-top: 1px solid var(--art-border);
    background: #fafbfc;
}

.related-reading h2 {
    font-size: 1rem;
    font-weight: 650;
    color: #0f172a;
    margin: 0 0 14px;
    padding: 0;
    border: 0;
    letter-spacing: 0.01em;
}

.related-reading h2::after {
    display: none;
}

.related-reading ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
}

.related-reading li {
    margin: 0;
}

.related-reading a {
    display: block;
    padding: 12px 16px;
    background: #fff;
    border: 1px solid var(--art-border);
    border-radius: var(--art-radius-sm);
    color: var(--art-accent);
    text-decoration: none;
    font-size: 15px;
    line-height: 1.5;
    transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.related-reading a:hover {
    background: var(--art-accent-soft);
    border-color: #93c5fd;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
}

/* ── 页脚导航 ── */
.article-footer {
    padding: 20px 40px 28px;
    border-top: 1px solid var(--art-border);
    background: #fff;
}

.back-link {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
}

.back-link a {
    color: var(--art-muted);
    text-decoration: none;
    transition: color 0.15s;
}

.back-link a:hover {
    color: var(--art-accent);
}

.back-link .sep {
    color: #cbd5e1;
    margin: 0 6px;
}

/* ── 导航栏微调（文章页） ── */
body.article-body .navbar {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--art-border);
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

body.article-body .nav-links a:hover {
    color: var(--art-accent);
}

@media (min-width: 641px) and (max-width: 900px) {
    .figure-gallery--3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ── 响应式 ── */
@media (max-width: 640px) {
    .article-page {
        padding: 88px 12px 48px;
    }

    .article-header {
        padding: 24px 20px 20px;
    }

    .article-content {
        padding: 24px 20px 28px;
    }

    .related-reading,
    .article-footer {
        padding-left: 20px;
        padding-right: 20px;
    }

    .article-card h1 {
        font-size: 1.5rem;
    }

    .lead {
        font-size: 1rem;
        padding-left: 14px;
    }

    .figure-gallery {
        padding: 16px 14px;
        gap: 16px;
    }

    .figure-gallery--2,
    .figure-gallery--3 {
        grid-template-columns: 1fr;
    }

    .figure--phone {
        max-width: 220px;
    }

    .figure--preview img {
        max-width: 100%;
        padding: 12px;
    }

    .figure-device {
        padding: 8px 6px 10px;
        border-radius: 22px;
    }

    .figure--phone img {
        max-width: 200px;
    }

    th,
    td {
        padding: 9px 12px;
        font-size: 13px;
    }
}