/* ===== About Intro ===== */
.about-intro {
    padding: 100px 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-weight: 300;
    letter-spacing: 3px;
}

.about-text .subtitle {
    color: var(--primary-color);
    font-size: 16px;
    margin-bottom: 20px;
}

.about-text p {
    font-size: 14px;
    line-height: 2;
    color: #666;
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    color: var(--primary-color);
    font-weight: 300;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 12px;
    color: #999;
}

.about-image {
    height: 500px;
    overflow: hidden;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===== Brand Concept ===== */
.brand-concept {
    padding: 100px 0;
    background: var(--light-bg);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.concept-item {
    text-align: center;
    padding: 40px 20px;
    background: var(--white);
    transition: all 0.3s ease;
}

.concept-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.concept-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.concept-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.concept-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

/* ===== Timeline ===== */
.timeline {
    padding: 100px 0;
    background: var(--white);
}

.timeline-list {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline-list::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--primary-color);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-year {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 600;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.timeline-content {
    width: 45%;
    padding: 20px;
    background: var(--light-bg);
}

.timeline-content h3 {
    font-size: 18px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.timeline-content p {
    font-size: 14px;
    color: #666;
}

/* ===== FAQ 常见问题 ===== */
.faq-section {
    padding: 100px 0;
    background: var(--light-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: box-shadow 0.3s;
}

.faq-item:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: #333;
    user-select: none;
    transition: color 0.3s;
}

.faq-question:hover {
    color: var(--primary-color);
}

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #f5f0e8;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s ease;
    font-size: 12px;
    color: var(--primary-color);
}

.faq-item.open .faq-icon {
    background: var(--primary-color);
    color: white;
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    color: #666;
    font-size: 14px;
    line-height: 1.9;
    transition: all 0.35s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 22px 68px;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .concept-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .timeline-list::before {
        left: 40px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }
    
    .timeline-year {
        left: 0;
        transform: none;
        width: 60px;
        height: 60px;
        font-size: 14px;
    }
    
    .timeline-content {
        width: 100%;
    }
}

@media (max-width: 576px) {
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .concept-grid {
        grid-template-columns: 1fr;
    }
}