/* About页面的自定义样式 */
.main-content {
    display: flex;
    min-height: 100vh;
    padding: 10rem 4rem 4rem;
    max-width: 1600px;
    margin: 0 auto;
    gap: 6rem;
}

.left-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.avatar {
    width: 200px;
    height: 200px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 2.5rem;
    border: 1px solid var(--border);
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #0a0a0a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: 700;
}

.intro-section {
    max-width: 300px;
}

.intro-greeting {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.intro-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.intro-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.center-column {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.section-title {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
    width: 100%;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

.timeline-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 0;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    transform: translateX(-50%);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.timeline-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.timeline-date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.timeline-company {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.skill-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: rgba(211, 47, 47, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

.right-column {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.work-item {
    margin-bottom: 2.5rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
}

.work-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.work-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.work-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.work-date {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    letter-spacing: 1px;
}

.work-company {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.work-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border);
    transition: color 0.3s ease;
    cursor: pointer;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item:hover {
    color: var(--accent);
}

.contact-icon {
    width: 18px;
    height: 18px;
    opacity: 0.5;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
}

.contact-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    min-width: 50px;
}

.contact-value {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

@media (max-width: 1200px) {
    .main-content {
        flex-direction: column;
        padding: 8rem 2rem 4rem;
        gap: 4rem;
    }

    .left-column {
        align-items: center;
        text-align: center;
    }

    .intro-section {
        max-width: 100%;
    }

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

@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}