@charset "utf-8";

/* =====================================================
   蓝太平洋 · 新媒体传播分析平台页 样式
   依赖 css/webengine.css 提供的基础设计体系
   （top-bar / main-header / hero / section / cta / footer）
   本文件仅包含本页专属组件
   ===================================================== */

/* ---------- 平台架构大图 ---------- */
.platform-figure {
    margin: 0;
}

.platform-figure img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ---------- 系统特性网格 ---------- */
.sys-feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.sys-feature {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: var(--card-bg);
    padding: 20px 22px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    text-align: justify;
}

.sys-feature::before {
    content: "";
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    margin-top: 9px;
    background: var(--accent);
    border-radius: 50%;
}

/* ---------- 传播分析四维度卡片 ---------- */
.spread-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.spread-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px 22px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.spread-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(41, 62, 132, 0.14);
}

.spread-card img.icon {
    width: 40px;
    height: 40px;
    margin: 0 auto 12px;
    object-fit: contain;
}

.spread-card h3 {
    font-size: 17px;
    color: var(--brand);
    margin: 0 0 10px;
}

.spread-card p {
    margin: 0 0 16px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    text-align: justify;
}

.spread-card img.chart {
    max-width: 160px;
    margin: 0 auto;
}

/* ---------- 图文两栏 ---------- */
.media-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.media-grid .media-text p {
    margin: 0 0 16px;
    color: var(--text-muted);
    text-align: justify;
}

.media-grid .media-text strong {
    color: var(--brand);
}

.media-grid .media-img img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ---------- 渠道分析四宫格 ---------- */
.channel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.channel-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
}

.channel-card .ch-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.channel-card .ch-head img {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    object-fit: contain;
}

.channel-card h3 {
    font-size: 19px;
    color: var(--brand);
    margin: 0;
}

.channel-card p {
    margin: 0 0 12px;
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.7;
    text-align: justify;
}

.channel-card p:last-child {
    margin-bottom: 0;
}

.channel-card .ch-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.channel-card .ch-tags span {
    background: rgba(41, 62, 132, 0.08);
    color: var(--brand);
    font-size: 13px;
    padding: 4px 12px;
    border-radius: 14px;
}

/* ---------- 事件分析 ---------- */
.event-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.event-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 26px 24px;
    border-top: 4px solid var(--accent);
}

.event-card h3 {
    font-size: 17px;
    color: var(--brand);
    margin: 0 0 12px;
}

.event-card p {
    margin: 0;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
    text-align: justify;
}

/* ---------- FAQ ---------- */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq-list details {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
    overflow: hidden;
}

.faq-list summary {
    list-style: none;
    cursor: pointer;
    padding: 18px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

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

.faq-list summary::after {
    content: "+";
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    line-height: 24px;
    text-align: center;
    border-radius: 50%;
    background: rgba(41, 62, 132, 0.08);
    color: var(--brand);
    font-size: 16px;
    transition: transform 0.25s;
}

.faq-list details[open] summary::after {
    content: "−";
    transform: rotate(180deg);
}

.faq-list details p {
    margin: 0;
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.8;
    text-align: justify;
}

/* =====================================================
   响应式：平板 ≤1024px
   ===================================================== */
@media (max-width: 1024px) {
    .sys-feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

/* =====================================================
   响应式：手机端 ≤768px
   ===================================================== */
@media (max-width: 768px) {
    .sys-feature-grid,
    .spread-grid,
    .event-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .media-grid,
    .channel-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .channel-card {
        padding: 22px;
    }

    .faq-list summary {
        font-size: 15px;
        padding: 16px 18px;
    }

    .faq-list details p {
        padding: 0 18px 18px;
    }
}