/* ================================================================
 * 解决方案子页面公共样式（ss- 前缀命名空间）
 * 适用于桥梁数字孪生基座、AI桥梁病害检测等解决方案下一级页面
 * ================================================================ */

/* ========== 面包屑导航 ========== */
.ss-breadcrumb {
    padding: 16px 0 0;
    color: #93c5fd;
    font-size: 14px;
    margin-bottom: 20px;
}
.ss-breadcrumb a { color: #93c5fd; transition: color 0.2s; }
.ss-breadcrumb a:hover { color: #fff; }
.ss-breadcrumb .separator { margin: 0 8px; opacity: 0.6; }
.ss-breadcrumb .current { color: #fff; font-weight: 500; }

/* ========== 子页面Banner微调 ========== */
.ss-banner-sub .solution-banner { min-height: auto; }
.ss-banner-sub .banner-content { padding-top: 0; }

/* ========== 三支柱卡片（3列居中大图标） ========== */
.ss-pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 50px;
}
.ss-pillars.cols-4 { grid-template-columns: repeat(4, 1fr); }
.ss-pillar {
    background: #fff;
    border-radius: 12px;
    padding: 32px 28px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}
.ss-pillar:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 36px rgba(37, 99, 235, 0.12);
}
.ss-pillar .icon-box {
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}
.ss-pillar:hover .icon-box {
    background: var(--primary);
}
.ss-pillar:hover .icon-box i {
    color: #fff;
}
.ss-pillar h3 {
    font-size: 18px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
}
.ss-pillar p {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
    margin: 0;
}

/* ========== 通用卡片网格（小图标+标题同行，描述换行） ========== */
.ss-card-grid {
    display: grid;
    gap: 24px;
    margin-top: 50px;
}
.ss-card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.ss-card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }

.ss-card {
    background: #fff;
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    border: 1px solid #f3f4f6;
    transition: all 0.3s ease;
}
.ss-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.12);
    border-color: #bfdbfe;
}
.ss-card-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 12px;
}
.ss-card-head .icon-small {
    margin-right: 0;
    flex-shrink: 0;
    transition: all 0.3s ease;
}
.ss-card:hover .icon-small {
    background: var(--primary);
}
.ss-card:hover .icon-small i {
    color: #fff;
}
.ss-card-head h3 {
    font-size: 18px;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
}
.ss-card-body p {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
    margin: 0;
}

/* 红色警示变体（痛点类卡片） */
.ss-card.red:hover {
    box-shadow: 0 12px 28px rgba(239, 68, 68, 0.1);
    border-color: #fecaca;
}
.ss-card.red .icon-small {
    background: #fef2f2;
}
.ss-card.red .icon-small i {
    color: #ef4444;
}
.ss-card.red:hover .icon-small {
    background: #ef4444;
}
.ss-card.red:hover .icon-small i {
    color: #fff;
}

/* 卡片内小标签 */
.ss-tag {
    display: inline-block;
    background: #eff6ff;
    color: var(--primary);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    margin-top: 14px;
}

/* ========== 流程图组件 ========== */
.ss-flow-block {
    margin-top: 50px;
    background: #fff;
    border-radius: 16px;
    padding: 48px 40px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}
.ss-flow-block.compact {
    padding: 32px;
    border-radius: 12px;
}
.ss-flow-label {
    text-align: center;
    font-size: 13px;
    color: #9ca3af;
    margin-bottom: 16px;
    letter-spacing: 1px;
}
.ss-flow-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.ss-flow-node {
    flex: 1;
    min-width: 120px;
    max-width: 160px;
    text-align: center;
    padding: 16px 12px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    background: #eff6ff;
    color: var(--primary);
    border: 1px solid var(--primary);
}
/* 节点变体：灰色旧模式 */
.ss-flow-node.old {
    background: #f3f4f6;
    color: #6b7280;
    border: 1px solid #e5e7eb;
    font-weight: 500;
}
/* 节点变体：红色警示 */
.ss-flow-node.red {
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}
.ss-flow-arrow {
    color: #9ca3af;
    font-size: 18px;
    flex-shrink: 0;
}
.ss-flow-arrow.blue { color: var(--primary); }
.ss-flow-arrow.red { color: #fca5a5; }

/* 两段流程之间的过渡徽章（数字孪生新旧对比） */
.ss-flow-bridge {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 28px 0;
}
.ss-flow-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, #1e40af, var(--primary));
    color: #fff;
    padding: 10px 24px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}
.ss-flow-badge.lg {
    padding: 12px 28px;
}

/* 流程底部总结条 */
.ss-flow-summary {
    text-align: center;
    margin-top: 32px;
    padding: 20px;
    background: #eff6ff;
    border-radius: 10px;
    color: var(--primary);
    font-size: 15px;
    line-height: 1.7;
}
.ss-flow-summary.red {
    background: #fef2f2;
    color: #b91c1c;
}
.ss-flow-summary.green {
    background: #f0fdf4;
    color: #065f46;
    border: 1px solid #bbf7d0;
}

/* ========== FAQ手风琴 ========== */
.ss-faq-list { max-width: 880px; margin: 50px auto 0; }
.ss-faq-item {
    background: #fff;
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border: 1px solid #f3f4f6;
}
.ss-faq-input { display: none; }
.ss-faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #1f2937;
    transition: background 0.2s ease;
}
.ss-faq-question:hover { background: #eff6ff; }
.ss-faq-q-tag {
    color: var(--primary);
    font-weight: 700;
    margin-right: 10px;
}
.ss-faq-icon {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: transform 0.3s ease;
}
.ss-faq-input:checked + .ss-faq-question .ss-faq-icon { transform: rotate(45deg); }
.ss-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
    color: #4b5563;
    font-size: 14px;
    line-height: 1.7;
}
.ss-faq-input:checked + .ss-faq-question + .ss-faq-answer {
    max-height: 500px;
    padding: 0 24px 22px;
}
.ss-faq-short {
    display: inline-block;
    background: #eff6ff;
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 10px;
}

/* ========== CTA转化区（左右布局，参考riebotech.com） ========== */
.ss-cta {
    background: rgb(3, 19, 38);
    color: #fff;
    padding: 74px 0;
}
.ss-cta .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}
.ss-cta-text { flex: 1; }
.ss-cta-tag {
    font-size: 10px;
    letter-spacing: 0.16em;
    font-weight: 800;
    color: #bdd7ff;
    text-transform: uppercase;
}
.ss-cta h2 {
    font-size: 38px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.04em;
    margin: 10px 0;
    color: #fff;
}
.ss-cta p {
    font-size: 15px;
    color: #d5e5f7;
    margin: 15px 0;
}
.ss-cta-btn {
    width: 150px;
    height: 150px;
    border: 1px solid rgba(255,255,255,0.45);
    border-radius: 50%;
    display: grid;
    place-items: center;
    text-align: center;
    font-weight: 750;
    color: #fff;
    text-decoration: none;
    transition: all 0.35s;
    flex-shrink: 0;
    font-size: 15px;
}
.ss-cta-btn:hover {
    background: #fff;
    color: var(--primary);
    transform: rotate(-6deg) scale(1.04);
}

/* ========== 性能指标大数字卡 ========== */
.ss-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 50px;
}
.ss-metric-card {
    background: #fff;
    border-radius: 12px;
    padding: 28px 24px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    border: 1px solid #f3f4f6;
    transition: all 0.3s ease;
}
.ss-metric-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.12);
    border-color: #bfdbfe;
}
.ss-metric-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    line-height: 1.2;
}
.ss-metric-value span {
    font-size: 16px;
    font-weight: 500;
    color: #6b7280;
}
.ss-metric-label {
    font-size: 15px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 6px;
}
.ss-metric-desc {
    font-size: 13px;
    color: #9ca3af;
    line-height: 1.6;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .ss-pillars, .ss-pillars.cols-4 { grid-template-columns: repeat(2, 1fr); }
    .ss-card-grid.cols-3 { grid-template-columns: repeat(2, 1fr); }
    .ss-metrics-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .ss-pillars,
    .ss-pillars.cols-4,
    .ss-card-grid.cols-2,
    .ss-card-grid.cols-3,
    .ss-metrics-grid { grid-template-columns: 1fr; }
    .ss-flow-row { flex-direction: column; }
    .ss-flow-arrow { transform: rotate(90deg); }
    .ss-cta .container { flex-direction: column; text-align: center; gap: 30px; }
    .ss-cta-btn { width: 130px; height: 130px; }
    .ss-cta h2 { font-size: 28px; }
}