/* =============================================
   子羡科技官网 - 关于我们页样式
   ============================================= */

/* 数字展示 */
.about-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; background: var(--bg-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.about-stat-item { padding: 40px 32px; text-align: center; border-right: 1px solid var(--border); }
.about-stat-item:last-child { border-right: none; }
.about-stat-num { font-size: 44px; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 8px; }
.about-stat-label { font-size: 15px; color: var(--text-sub); }

/* 公司简介 */
.about-intro { padding: 80px 0; }
.about-intro-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-intro-img { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4/3; background: linear-gradient(135deg, #1a56db 0%, #0a0f2e 100%); display: flex; align-items: center; justify-content: center; position: relative; }
.about-intro-img-placeholder { text-align: center; color: rgba(255,255,255,.5); }
.about-intro-img-placeholder .big-icon { font-size: 80px; margin-bottom: 16px; }
.about-intro-img-placeholder p { font-size: 18px; color: rgba(255,255,255,.6); font-weight: 600; }
.about-cert { position: absolute; bottom: 20px; left: 20px; right: 20px; background: rgba(255,255,255,.1); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,.2); border-radius: 12px; padding: 16px 20px; display: flex; gap: 16px; }
.about-cert-item { text-align: center; flex: 1; }
.about-cert-num { font-size: 20px; font-weight: 800; color: #fff; }
.about-cert-label { font-size: 11px; color: rgba(255,255,255,.6); margin-top: 2px; }

.about-intro-content {}
.about-intro-content p { font-size: 16px; color: var(--text-sub); line-height: 1.9; margin-bottom: 16px; }

/* 发展历程 */
.timeline-section { background: var(--bg-gray); padding: 80px 0; }
.timeline { position: relative; max-width: 760px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--border); transform: translateX(-50%); }
.timeline-item { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: start; margin-bottom: 40px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-left { text-align: right; padding-top: 4px; }
.timeline-right { padding-top: 4px; }
.timeline-item:nth-child(even) .timeline-left { text-align: right; }
.timeline-dot { width: 48px; height: 48px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; box-shadow: 0 0 0 6px var(--primary-light); }
.timeline-dot span { color: #fff; font-size: 11px; font-weight: 800; }
.timeline-year { font-size: 28px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.timeline-title { font-size: 17px; font-weight: 700; color: var(--secondary); margin-bottom: 6px; }
.timeline-desc { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* 移动端时间线 - 默认隐藏 */
.timeline-mobile { display: none; position: relative; padding-left: 40px; }
.timeline-mobile::before { content: ''; position: absolute; left: 15px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item-mobile { position: relative; margin-bottom: 32px; }
.timeline-dot-mobile { position: absolute; left: -40px; top: 0; width: 32px; height: 32px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; z-index: 1; box-shadow: 0 0 0 4px var(--primary-light); }
.timeline-dot-mobile span { color: #fff; font-size: 10px; font-weight: 800; }
.timeline-content-mobile { padding-left: 16px; }

/* 团队介绍 */
.team-section { padding: 80px 0; background: var(--bg-white); }
.team-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.team-card { text-align: center; padding: 32px 20px; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.team-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: var(--primary); }
.team-avatar { width: 80px; height: 80px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 28px; font-weight: 800; color: #fff; }
.team-name { font-size: 17px; font-weight: 700; color: var(--secondary); margin-bottom: 4px; }
.team-role { font-size: 13px; color: var(--primary); font-weight: 500; margin-bottom: 12px; }
.team-desc { font-size: 13px; color: var(--text-sub); line-height: 1.7; }

/* 核心价值观 */
.values-section { background: var(--bg-gray); padding: 80px 0; }
.values-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.value-card { padding: 32px 24px; background: var(--bg-white); border-radius: var(--radius); text-align: center; transition: var(--transition); }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.value-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--primary), #3b82f6); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.value-icon svg { color: #fff; }
.value-title { font-size: 18px; font-weight: 700; color: var(--secondary); margin-bottom: 12px; }
.value-desc { font-size: 14px; color: var(--text-sub); line-height: 1.8; }

/* 资质认证 */
.cert-section { padding: 60px 0; background: var(--bg-white); }
.cert-list { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; }
.cert-item { display: flex; align-items: center; gap: 12px; padding: 16px 24px; border: 1px solid var(--border); border-radius: var(--radius-sm); }
.cert-item svg { color: var(--primary); }
.cert-item-text { font-size: 14px; font-weight: 500; color: var(--text-main); }

/* 响应式 */
@media (max-width: 1024px) {
    .about-stats { grid-template-columns: 1fr 1fr; }
    .about-stat-item:nth-child(2) { border-right: none; }
    .about-stat-item:nth-child(1), .about-stat-item:nth-child(2) { border-bottom: 1px solid var(--border); }
    .team-grid { grid-template-columns: 1fr 1fr; }
    .values-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .about-intro-inner { grid-template-columns: 1fr; }
    .timeline { display: none; }
    .timeline-mobile { display: block; }
    .team-grid { grid-template-columns: 1fr 1fr; }
    .values-grid { grid-template-columns: 1fr 1fr; }
    .about-stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .team-grid { grid-template-columns: 1fr; }
    .values-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr; }
    .about-stat-item { border-right: none !important; border-bottom: 1px solid var(--border); }
    .about-stat-item:last-child { border-bottom: none; }
}