/* ============================================================
 * intro-common.css
 * 模块说明页 公共样式
 * @author   DevToolsHub
 * @version  1.0.0
 * @created  2026-05-22
 * @standard 阿里巴巴前端开发规范
 * ============================================================ */

/* ===== 说明页 Hero ===== */
.intro-hero {
    padding: 48px 24px 40px;
    background: linear-gradient(135deg, #f0fdf4 0%, #dbeafe 100%);
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.intro-hero__icon {
    font-size: 56px;
    line-height: 1;
    margin-bottom: 16px;
}

.intro-hero__title {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.intro-hero__desc {
    font-size: 16px;
    color: var(--text-sub);
    max-width: 620px;
    margin: 0 auto 24px;
    line-height: 1.7;
}

.intro-hero__cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(62, 207, 142, 0.35);
}

.intro-hero__cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(62, 207, 142, 0.45);
}

/* ===== 说明页主体 ===== */
.intro-main {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 24px 60px;
}

/* ===== 内容区块 ===== */
.intro-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.intro-section__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.intro-section__title .s-icon {
    font-size: 20px;
}

/* ===== 特性卡片网格 ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.feature-card {
    padding: 18px 16px;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.feature-card__icon {
    font-size: 28px;
    margin-bottom: 10px;
}

.feature-card__name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
}

.feature-card__desc {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* ===== 使用步骤 ===== */
.step-list {
    list-style: none;
    counter-reset: step-counter;
}

.step-list__item {
    counter-increment: step-counter;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
}

.step-list__item:last-child {
    border-bottom: none;
}

.step-list__item::before {
    content: counter(step-counter);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
}

.step-list__text {
    flex: 1;
}

.step-list__text strong {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
}

.step-list__text span {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* ===== FAQ 手风琴 ===== */
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 10px;
    overflow: hidden;
}

.faq-item__q {
    padding: 14px 18px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg);
    transition: var(--transition);
    user-select: none;
}

.faq-item__q:hover {
    background: var(--primary-light);
}

.faq-item__q .faq-arrow {
    font-size: 12px;
    transition: transform 0.2s;
}

.faq-item__q.is-open .faq-arrow {
    transform: rotate(180deg);
}

.faq-item__a {
    display: none;
    padding: 14px 18px;
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.7;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
}

/* ===== 广告位 Banner ===== */
.ad-banner {
    width: 100%;
    background: #f8f9fa;
    border: 1px dashed #cbd5e1;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    color: var(--text-light);
    font-size: 12px;
    margin: 24px 0;
}

.ad-banner--leaderboard {
    height: 90px;
    /* 替换为 AdSense ins 728x90 横幅代码 */
}

.ad-banner--rectangle {
    height: 250px;
    max-width: 336px;
    margin: 24px auto;
    /* 替换为 AdSense ins 336x280 矩形代码 */
}

.ad-banner--footer {
    height: 90px;
    /* 替换为 AdSense ins 728x90 或自适应 auto 代码 */
}

/* ===== 内容标签 ===== */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary-dark);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* ===== 信息对比表格 ===== */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.compare-table th {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 700;
    padding: 10px 14px;
    text-align: left;
}

.compare-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-sub);
    vertical-align: middle;
}

.compare-table tr:last-child td {
    border-bottom: none;
}

.compare-table tr:hover td {
    background: var(--bg);
}

/* ===== 官网跳转按钮 ===== */
.official-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border: 1.5px solid var(--primary);
    color: var(--primary-dark);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.official-link:hover {
    background: var(--primary);
    color: #fff;
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .intro-hero__title {
        font-size: 24px;
    }

    .intro-hero__desc {
        font-size: 14px;
    }

    .intro-section {
        padding: 18px 16px;
    }

    .feature-grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

    .intro-hero {
        padding: 32px 16px 28px;
    }
}