/* ============================================
   关于我们页面样式 - Apple 风格
   ============================================ */

.page-header {
    background: #ffffff;
    padding: 80px 0 60px;
    text-align: center;
}
.page-header h1 {
    font-size: 2.4rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 12px;
}
.page-header p {
    font-size: 1rem;
    color: #86868b;
}

/* 公司介绍 */
.about-intro {
    background: #ffffff;
    padding: 80px 0;
}
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.intro-text h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 20px;
}
.intro-text p {
    font-size: 1rem;
    color: #86868b;
    line-height: 1.8;
    margin-bottom: 16px;
}
.intro-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid #d2d2d7;
}
.stat-item {
    display: flex;
    flex-direction: column;
}
.stat-num {
    font-size: 2rem;
    font-weight: 700;
    color: #0071e3;
    line-height: 1;
}
.stat-label {
    font-size: 0.85rem;
    color: #86868b;
    margin-top: 4px;
}
.intro-img img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.1);
}

/* 优势 */
.about-advantage {
    background: #f5f5f7;
    padding: 80px 0;
}
.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: #0071e3;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 10px;
}
.section-title {
    font-size: 2.2rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 12px;
}
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.advantage-item {
    background: #fff;
    border-radius: 20px;
    padding: 36px 24px;
    text-align: center;
    transition: all 0.3s;
}
.advantage-item:hover {
    box-shadow: 0 8px 32px rgba(0,0,0,0.08);
    transform: translateY(-4px);
}
.advantage-item i {
    font-size: 2rem;
    color: #0071e3;
    margin-bottom: 16px;
}
.advantage-item h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 12px;
}
.advantage-item p {
    font-size: 0.88rem;
    color: #86868b;
    line-height: 1.6;
}

/* 发展历程 */
.about-timeline {
    background: #ffffff;
    padding: 80px 0;
}
.timeline {
    max-width: 700px;
    margin: 0 auto;
}
.timeline-item {
    display: flex;
    gap: 28px;
    margin-bottom: 40px;
    position: relative;
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: 52px;
    top: 36px;
    bottom: -20px;
    width: 1px;
    background: #d2d2d7;
}
.timeline-item:last-child::before {
    display: none;
}
.timeline-year {
    width: 52px;
    height: 52px;
    background: #0071e3;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    flex-shrink: 0;
    z-index: 1;
}
.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 8px;
    padding-top: 10px;
}
.timeline-content p {
    font-size: 0.9rem;
    color: #86868b;
    line-height: 1.6;
}

/* 理念 */
.about-culture {
    background: #f5f5f7;
    padding: 80px 0;
}
.culture-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}
.culture-content h2 {
    font-size: 2rem;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 24px;
}
.culture-quote {
    font-size: 1.1rem;
    color: #86868b;
    line-height: 1.8;
    margin-bottom: 36px;
    font-style: italic;
}
.culture-points {
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
}
.culture-point {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    color: #1d1d1f;
}
.culture-point i {
    color: #0071e3;
    font-size: 1rem;
}

/* CTA */
.cta-section {
    background: #000;
    padding: 80px 0;
    text-align: center;
}
.cta-content h2 {
    color: #fff;
    font-size: 2rem;
    margin-bottom: 12px;
}
.cta-content p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 28px;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #0071e3;
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 980px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: background 0.3s;
}
.btn-primary:hover { background: #0077ed; }
.btn-large { padding: 14px 28px; font-size: 0.95rem; }

/* 页脚 */
.footer {
    background: #f5f5f7;
    color: #1d1d1f;
    padding: 60px 0 30px;
}
.footer-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #1d1d1f;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-logo i { color: #0071e3; }
.footer-desc { color: #86868b; line-height: 1.7; margin-bottom: 20px; font-size: 0.9rem; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.footer-column h4 { color: #1d1d1f; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.footer-column ul { list-style: none; }
.footer-column li { margin-bottom: 10px; }
.footer-column a { color: #86868b; text-decoration: none; font-size: 0.85rem; transition: color 0.3s; }
.footer-column a:hover { color: #0071e3; }
.contact-list li { display: flex; align-items: center; gap: 8px; color: #86868b; font-size: 0.85rem; }
.contact-list i { color: #0071e3; width: 14px; }
.footer-bottom { border-top: 1px solid #d2d2d7; padding-top: 24px; text-align: center; }
.footer-bottom p { color: #86868b; font-size: 0.8rem; }
.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px; background: #e8e8ed; color: #1d1d1f; border: none; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 1rem; opacity: 0; visibility: hidden; transition: all 0.3s; z-index: 999; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: #0071e3; color: #fff; }

/* 响应式 */
@media (max-width: 1024px) {
    .intro-grid { grid-template-columns: 1fr; gap: 48px; }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-wrapper { grid-template-columns: 1fr; gap: 40px; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .intro-stats { flex-direction: column; gap: 20px; }
    .advantage-grid { grid-template-columns: 1fr; }
    .footer-links { grid-template-columns: 1fr; }
}