/* ========================================
   文章页面样式
   ======================================== */

:root {
    --bg: #FAFAFA;
    --bg-white: #FFFFFF;
    --text: #1A1A2E;
    --text-light: #6B7280;
    --primary: #4B5C6E;
    --accent: #5C6B7A;
    --border: #E5E7EB;
    --radius: 8px;
    --radius-lg: 12px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   头部
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 250, 250, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    color: var(--text-light);
    transition: all 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 20px;
    height: 2px;
    background: var(--text);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: white;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    z-index: 99;
}

.mobile-menu.show {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 12px 0;
    font-size: 15px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

/* ========================================
   文章容器
   ======================================== */
.article-container {
    margin-top: 60px;
    padding: 60px 0 80px;
}

/* ========================================
   文章头部
   ======================================== */
.article-header {
    margin-bottom: 48px;
    text-align: center;
}

.article-meta {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 20px;
}

.article-category {
    font-size: 12px;
    font-weight: 500;
    color: white;
    background: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-date {
    font-size: 13px;
    color: var(--text-light);
    line-height: 28px;
}

.article-title {
    font-size: 36px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text);
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.article-subtitle {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.6;
    max-width: 560px;
    margin: 0 auto;
}

/* ========================================
   文章导语
   ======================================== */
.article-intro {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 40px;
    border-left: 4px solid var(--primary);
}

.article-intro p {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 12px;
    line-height: 1.8;
}

.article-intro p:last-child {
    margin-bottom: 0;
}

/* ========================================
   目录
   ======================================== */
.article-toc {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    margin-bottom: 40px;
    border: 1px solid var(--border);
}

.article-toc h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.article-toc ol {
    list-style: none;
}

.article-toc li {
    margin-bottom: 8px;
}

.article-toc a {
    font-size: 15px;
    color: var(--primary);
    transition: all 0.2s ease;
}

.article-toc a:hover {
    color: var(--text);
}

/* ========================================
   文章正文
   ======================================== */
.article-body {
    background: white;
    border-radius: var(--radius-lg);
    padding: 48px;
    margin-bottom: 40px;
}

.article-body h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
    margin-top: 48px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

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

.article-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-top: 32px;
    margin-bottom: 12px;
}

.article-body p {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.8;
}

.article-body ol {
    padding-left: 24px;
    margin-bottom: 20px;
}

.article-body li {
    font-size: 15px;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.7;
}

/* 步骤列表 */
.step-list li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 14px !important;
}

.step-list li::before {
    content: counter(step);
    counter-increment: step;
    position: absolute;
    left: 0;
    top: 2px;
    width: 22px;
    height: 22px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-list {
    counter-reset: step;
    list-style: none;
    padding-left: 0 !important;
}

/* 场景列表 */
.article-list {
    margin: 24px 0;
}

.list-item {
    background: var(--bg);
    border-radius: var(--radius);
    padding: 20px 24px;
    margin-bottom: 12px;
}

.list-item strong {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    display: block;
    margin-bottom: 6px;
}

.list-item p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 0;
}

/* 支持应用卡片网格 */
.app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 24px 0;
}

.app-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: border-color 0.2s;
}

.app-card:hover {
    border-color: rgba(255,107,53,0.4);
}

.app-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.app-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text);
}

.app-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
    flex-shrink: 0;
}

.app-badge-ok {
    background: rgba(52,199,89,0.15);
    color: #34c759;
}

.app-desc {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.5;
}

.app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px solid var(--border);
}

.app-level {
    font-size: 12px;
    color: var(--text-light);
}

.app-level strong {
    color: var(--text);
}

/* FAQ */
.faq-block {
    margin-top: 24px;
}

.faq-item {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.faq-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}

.faq-item p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 0;
    line-height: 1.7;
}

/* ========================================
   文章CTA
   ======================================== */
.article-cta {
    background: var(--text);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    margin-bottom: 40px;
}

.article-cta h3 {
    font-size: 22px;
    font-weight: 600;
    color: white;
    margin-bottom: 12px;
}

.article-cta p {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 28px;
}

.cta-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: white;
    color: var(--text);
}

.btn-primary:hover {
    background: var(--bg);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    border-color: white;
}

/* ========================================
   相关文章
   ======================================== */
.related-articles {
    margin-top: 40px;
}

.related-articles h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 20px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.related-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}

.related-card:hover {
    border-color: var(--primary);
}

.related-category {
    font-size: 11px;
    font-weight: 500;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: block;
    margin-bottom: 8px;
}

.related-card h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
}

/* ========================================
   悬浮咨询按钮
   ======================================== */
.float-consult {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 100;
}

.consult-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--text);
    color: white;
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    transition: all 0.2s;
}

.consult-btn:hover {
    transform: scale(1.05);
}

.consult-popup {
    position: absolute;
    bottom: 68px;
    right: 0;
    background: white;
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.2s;
    border: 1px solid var(--border);
}

.consult-popup.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.consult-popup a {
    display: block;
    padding: 14px 20px;
    font-size: 14px;
    color: var(--text);
    white-space: nowrap;
    transition: background 0.2s;
    border-bottom: 1px solid var(--border);
}

.consult-popup a:last-child {
    border-bottom: none;
}

.consult-popup a:hover {
    background: var(--bg);
}

@media (max-width: 768px) {
    .float-consult {
        bottom: 16px;
        right: 16px;
    }
}

/* ========================================
   页脚
   ======================================== */
.footer {
    padding: 48px 0 32px;
    border-top: 1px solid var(--border);
}

.footer-brand {
    margin-bottom: 24px;
}

.footer-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 4px;
}

.footer-tagline {
    font-size: 14px;
    color: var(--text-light);
}

.footer-links {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.footer-links p {
    margin-bottom: 4px;
}

.footer-bottom {
    font-size: 13px;
    color: var(--text-light);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .article-container {
        padding: 40px 0 60px;
    }
    
    .article-title {
        font-size: 26px;
    }
    
    .article-subtitle {
        font-size: 16px;
    }
    
    .article-intro,
    .article-toc,
    .article-body {
        padding: 24px;
    }
    
    .article-body {
        padding: 32px 24px;
    }
    
    .article-cta {
        padding: 32px 24px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 200px;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .compare-table {
        font-size: 13px;
    }
    
    .compare-table th,
    .compare-table td {
        padding: 10px 12px;
    }

    .app-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .app-grid {
        grid-template-columns: 1fr;
    }
}