/* ============================================
   Timeline Page 样式 (timeline.css)
   ============================================ */

.timeline-content {
    max-width: 900px;
    min-height: 240px;
    margin: 0 auto;
    padding: 0 24px 32px;
}

.timeline-group {
    margin-bottom: 48px;
}

.timeline-year {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 24px;
    position: relative;
    padding-left: 16px;
}

.timeline-year::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

.timeline-items {
    position: relative;
    padding-left: 28px;
    border-left: 2px solid var(--color-border);
}

.timeline-items::before {
    content: '';
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--color-primary), transparent);
}

.tl-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 32px;
}

.tl-dot {
    position: absolute;
    left: -35px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 3px solid var(--color-primary);
    box-shadow: 0 0 0 4px var(--color-primary-light);
    transition: all var(--transition);
}

.tl-item:hover .tl-dot {
    background: var(--color-primary);
    transform: scale(1.15);
}

.tl-content {
    position: relative;
}

.tl-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 6px;
}

.tl-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
    transition: color var(--transition);
}

.tl-title a {
    color: inherit;
    text-decoration: none;
    cursor: pointer;
}

.tl-title:hover {
    color: var(--color-primary);
}

.tl-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.tl-tags {
    display: flex;
    gap: 6px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.tl-tag {
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-bg-alt);
    color: var(--color-text-muted);
}

/* ===== 加载 / 空 / 错误状态 ===== */
.timeline-status {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 56px 24px;
    text-align: center;
    color: var(--color-text-muted);
}

.timeline-status h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.timeline-status p {
    font-size: 14px;
}

.timeline-status[hidden],
.timeline-status [hidden],
.timeline-pager[hidden] {
    display: none !important;
}

.timeline-spinner {
    width: 26px;
    height: 26px;
    margin-bottom: 6px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: timeline-spin .8s linear infinite;
}

@keyframes timeline-spin {
    to { transform: rotate(360deg); }
}

.timeline-retry,
.timeline-jump-btn {
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.timeline-retry {
    margin-top: 8px;
    padding: 8px 18px;
}

.timeline-retry:hover,
.timeline-jump-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* ===== 分页 ===== */
.timeline-pager {
    max-width: 900px;
    margin: 0 auto 56px;
    padding: 0 24px;
}

.timeline-pager-info {
    text-align: center;
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.timeline-pager-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.timeline-pager-field {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.timeline-pager-field select,
.timeline-pager-field input {
    height: 36px;
    padding: 0 8px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    font-family: inherit;
    font-size: 13px;
    outline: none;
}

.timeline-pager-field input {
    width: 56px;
    text-align: center;
}

.timeline-pager-field select:focus,
.timeline-pager-field input:focus {
    border-color: var(--color-primary);
}

.timeline-jump-btn {
    height: 36px;
    padding: 0 12px;
}

.timeline-pagination {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    align-items: center;
}

.timeline-pagination .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: all var(--transition);
}

.timeline-pagination .page-btn:hover:not(.active):not(.disabled) {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.timeline-pagination .page-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(91, 94, 247, .3);
    cursor: default;
}

.timeline-pagination .page-btn.disabled {
    opacity: .4;
    cursor: not-allowed;
}

.timeline-pagination .page-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 40px;
    color: var(--color-text-muted);
    font-size: 14px;
    user-select: none;
}

@media (max-width: 640px) {
    .timeline-content {
        padding: 0 16px 24px;
    }

    .timeline-pager {
        padding: 0 16px;
        margin-bottom: 40px;
    }

    .timeline-pager-controls {
        gap: 10px;
    }

    .timeline-pagination {
        order: -1;
        width: 100%;
    }

    .timeline-pagination .page-btn {
        min-width: 34px;
        height: 34px;
        padding: 0 8px;
        font-size: 13px;
    }

    .timeline-pagination .page-ellipsis {
        height: 34px;
    }

    .timeline-pager-field input {
        width: 48px;
    }
}