/* ============================================
   企业官网 — 首页增强板块样式（大气升级版）
   行业痛点 / 发展历程 / 资质荣誉 / 讲师团队 / 新闻预览
   ============================================ */

/* ════════════════════════════════════════════
   行业痛点 (P1)
   ════════════════════════════════════════════ */
.pain-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    counter-reset: pain;
}

.pain-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--color-border);
    border-top: 3px solid var(--color-warning);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    overflow: hidden;
}

.pain-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    border-top-color: var(--color-warning);
}

.pain-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: var(--gradient-border);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.pain-card:hover::after {
    opacity: 1;
}

/* 用渐变编号替代 emoji 占位 */
.pain-card__icon {
    font-size: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(217, 119, 6, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
    color: var(--color-warning);
}

.pain-card__icon::before {
    counter-increment: pain;
    content: counter(pain, decimal-leading-zero);
    font-size: 1.4rem;
    font-weight: 800;
    line-height: 1;
}

.pain-card__symptom {
    font-size: var(--font-size-xs);
    color: var(--color-warning);
    font-weight: 700;
    letter-spacing: 0.06em;
}

.pain-card__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: var(--space-xs) 0 var(--space-sm);
    color: var(--color-text-dark);
    line-height: 1.4;
}

.pain-card__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.8;
}

.pain-card__fix {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px dashed var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 600;
}

.pain-card__fix a {
    color: var(--color-primary);
    text-decoration: none;
}

.pain-card__fix a:hover {
    text-decoration: underline;
}

/* ════════════════════════════════════════════
   发展历程 (T1) — 竖向时间轴
   ════════════════════════════════════════════ */
.timeline {
    position: relative;
    max-width: 820px;
    margin: 0 auto;
    padding-left: var(--space-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-2xl);
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-2xl) + 1px);
    top: 4px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gradient-primary);
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--color-primary), 0 0 14px rgba(34, 211, 238, 0.5);
}

.timeline-item__year {
    display: inline-block;
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: #fff;
    background: var(--gradient-primary);
    padding: 4px 16px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.3);
}

.timeline-item__title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.timeline-item__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ════════════════════════════════════════════
   资质荣誉 / 权威背书 (C1)
   ════════════════════════════════════════════ */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.cert-item {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    position: relative;
}

.cert-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.cert-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: var(--gradient-border);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.cert-item:hover::after {
    opacity: 1;
}

.cert-item__icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(34, 211, 238, 0.12));
    color: var(--color-primary);
    border-radius: 50%;
    font-size: 0;
}

.cert-item__icon svg {
    width: 28px;
    height: 28px;
}

.cert-item__icon img {
    width: 52px;
    height: 52px;
    object-fit: contain;
}

.cert-item__title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--space-xs);
}

.cert-item__desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ════════════════════════════════════════════
   讲师团队 (L1)
   ════════════════════════════════════════════ */
.lecturer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.lecturer-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.lecturer-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.lecturer-card__photo {
    width: 100%;
    aspect-ratio: 1 / 1;
    background: var(--gradient-primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    font-weight: 800;
    color: #fff;
    position: relative;
    overflow: hidden;
}

/* 真实照片模式：img 标签替换 emoji 时启用 */
.lecturer-card__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 25%;
    display: block;
}

.lecturer-card__photo::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 20%, rgba(34, 211, 238, 0.4), transparent 55%);
}

.lecturer-card__body {
    padding: var(--space-lg);
}

.lecturer-card__name {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-dark);
}

.lecturer-card__role {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 600;
    margin: var(--space-xs) 0 var(--space-sm);
}

.lecturer-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
}

.lecturer-card__tag {
    font-size: var(--font-size-xs);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--color-bg-alt);
    color: var(--color-text-light);
}

/* 讲师矩阵领域标签 */
.lecturer-domains {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-2xl);
}

.lecturer-domains .domain-chip {
    font-size: var(--font-size-sm);
    padding: 10px 22px;
    border-radius: var(--radius-full);
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.lecturer-domains .domain-chip:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(37, 99, 235, 0.05);
}

/* ════════════════════════════════════════════
   新闻中心预览 (N1)
   ════════════════════════════════════════════ */
.news-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.news-item {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 0;
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
    position: relative;
}

/* 真实新闻缩略图（顶部图片模式） */
.news-item__thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-bg-alt);
    position: relative;
}

.news-item__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.news-item:hover .news-item__thumb img {
    transform: scale(1.06);
}

.news-item__body {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.news-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.news-item::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: var(--gradient-border);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.news-item:hover::after {
    opacity: 1;
}

.news-item__date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.news-item__title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-dark);
    line-height: 1.7;
    flex: 1;
}

.news-item__more {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.news-item__more:hover {
    text-decoration: underline;
}

/* ════════════════════════════════════════════
   响应式
   ════════════════════════════════════════════ */
@media (max-width: 1024px) {
    .pain-grid,
    .cert-grid,
    .lecturer-grid,
    .news-preview {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .pain-grid,
    .cert-grid,
    .lecturer-grid,
    .news-preview {
        grid-template-columns: 1fr;
    }
    .timeline { padding-left: var(--space-xl); }
    .timeline-item::before { left: calc(-1 * var(--space-xl) + 1px); }
}