/**
 * 关于我们页面样式 - 全新设计
 * 遵循 DESIGN_SYSTEM.md 设计规范
 * 
 * @package MTO Moving
 * @since 1.0.0
 */

/* ==========================================================================
   核心数据展示区域 - 视觉焦点
   ========================================================================== */

.about-stats {
    padding: 80px 0;
    background: linear-gradient(135deg, #2c5f8d 0%, #1e4668 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.about-stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" stroke="rgba(255,255,255,0.03)" stroke-width="2" fill="none"/></svg>');
    opacity: 0.4;
}

.about-stats .container {
    position: relative;
    z-index: 1;
}

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

.stat-item {
    text-align: center;
    padding: 32px 20px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 52px;
    font-weight: 700;
    color: #ffd54f;
    font-family: 'Poppins', 'Roboto', sans-serif;
    line-height: 1;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.stat-label {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
}

/* ==========================================================================
   六大优势区域 - 卡片优化
   ========================================================================== */

.about-advantages {
    padding: 80px 0;
    background: #ffffff;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 12px 0;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #2c5f8d 0%, #4a90c5 100%);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 18px;
    color: #64748b;
    margin: 20px 0 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.advantage-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fb 100%);
    padding: 36px 28px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #2c5f8d 0%, #4a90c5 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(44, 95, 141, 0.2);
}

.advantage-icon {
    width: 88px;
    height: 88px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2c5f8d 0%, #4a90c5 100%);
    border-radius: 50%;
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(44, 95, 141, 0.3);
    transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 12px 32px rgba(44, 95, 141, 0.4);
}

.advantage-title {
    font-size: 22px;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 14px 0;
}

.advantage-desc {
    font-size: 15px;
    color: #64748b;
    line-height: 1.7;
    margin: 0;
}

/* ==========================================================================
   服务介绍区域 - 紧凑列表
   ========================================================================== */

.about-services {
    padding: 80px 0;
    background: #f8f9fb;
}

.services-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.service-item {
    display: flex;
    gap: 18px;
    background: #ffffff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.service-item:hover {
    transform: translateX(6px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    border-color: rgba(44, 95, 141, 0.2);
}

.service-icon-small {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #2c5f8d 0%, #4a90c5 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    transition: all 0.3s ease;
}

.service-item:hover .service-icon-small {
    transform: rotate(-5deg);
}

.service-content-small h4 {
    font-size: 18px;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 6px 0;
}

.service-content-small p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

.services-cta {
    text-align: center;
}

/* ==========================================================================
   团队介绍区域 - 图文并茂
   ========================================================================== */

.about-team {
    padding: 80px 0;
    background: #ffffff;
}

.team-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 56px;
    align-items: center;
}

.team-image {
    position: relative;
}

.team-image::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 3px solid #2c5f8d;
    border-radius: 16px;
    z-index: -1;
}

.team-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    display: block;
}

.team-text h3 {
    font-size: 30px;
    font-weight: 700;
    color: #1a202c;
    line-height: 1.3;
    margin: 0 0 24px 0;
}

.team-text p {
    font-size: 16px;
    color: #475569;
    line-height: 1.8;
    margin: 0 0 18px 0;
}

.team-values {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 32px;
    padding: 24px;
    background: #f8f9fb;
    border-radius: 12px;
    border-left: 4px solid #2c5f8d;
}

.value-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.value-item svg {
    color: #10b981;
    flex-shrink: 0;
}

.value-item span {
    font-size: 16px;
    font-weight: 600;
    color: #1a202c;
}

/* ==========================================================================
   资质认证区域 - 图标卡片
   ========================================================================== */

.about-certifications {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fb 0%, #ffffff 100%);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.cert-card {
    background: #ffffff;
    padding: 40px 28px;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
    border-color: rgba(44, 95, 141, 0.2);
}

.cert-icon {
    color: #2c5f8d;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.cert-card:hover .cert-icon {
    transform: scale(1.1);
    color: #4a90c5;
}

.cert-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 10px 0;
}

.cert-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin: 0;
}

/* ==========================================================================
   服务范围区域 - 地图+列表
   ========================================================================== */

.about-service-area {
    padding: 80px 0;
    background: #ffffff;
}

.service-area-content {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: start;
}

.area-map {
    position: relative;
}

.area-map::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    box-shadow: inset 0 0 0 1px rgba(44, 95, 141, 0.2);
    pointer-events: none;
}

.area-map img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    display: block;
}

.area-list h3 {
    font-size: 28px;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 28px 0;
}

.area-items {
    list-style: none;
    padding: 0;
    margin: 0 0 28px 0;
}

.area-items li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid #e2e8f0;
    transition: all 0.2s ease;
}

.area-items li:last-child {
    border-bottom: none;
}

.area-items li:hover {
    padding-left: 8px;
    background: #f8f9fb;
    margin: 0 -8px;
    padding-left: 16px;
    padding-right: 8px;
    border-radius: 8px;
}

.area-items svg {
    color: #2c5f8d;
    flex-shrink: 0;
    margin-top: 2px;
}

.area-items span {
    font-size: 15px;
    color: #475569;
    line-height: 1.6;
}

.area-note {
    background: linear-gradient(135deg, #fff3cd 0%, #fff9e6 100%);
    padding: 18px 22px;
    border-left: 4px solid #f39c12;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(243, 156, 18, 0.1);
}

.area-note p {
    font-size: 14px;
    color: #64748b;
    margin: 0;
    line-height: 1.6;
}

.area-note strong {
    color: #1a202c;
    font-weight: 700;
}

/* ==========================================================================
   按钮样式
   ========================================================================== */

.btn-secondary {
    background: transparent;
    color: #2c5f8d;
    border: 2px solid #2c5f8d;
    display: inline-flex;
    align-items: center;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #2c5f8d;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(44, 95, 141, 0.3);
}

/* ==========================================================================
   响应式设计 - 平板 (< 1024px)
   ========================================================================== */

@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .team-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .team-image::after {
        display: none;
    }

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

    .service-area-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

/* ==========================================================================
   响应式设计 - 移动端 (< 768px)
   ========================================================================== */

@media (max-width: 768px) {
    .about-stats {
        padding: 56px 0;
    }

    .stats-grid {
        gap: 16px;
    }

    .stat-item {
        padding: 24px 16px;
    }

    .stat-number {
        font-size: 40px;
    }

    .stat-label {
        font-size: 15px;
    }

    .about-advantages,
    .about-services,
    .about-team,
    .about-certifications,
    .about-service-area {
        padding: 56px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .advantage-card {
        padding: 32px 24px;
    }

    .advantage-icon {
        width: 72px;
        height: 72px;
    }

    .advantage-icon svg {
        width: 40px;
        height: 40px;
    }

    .advantage-title {
        font-size: 20px;
    }

    .advantage-desc {
        font-size: 14px;
    }

    .services-list {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-bottom: 36px;
    }

    .service-item {
        gap: 16px;
        padding: 20px;
    }

    .service-icon-small {
        width: 48px;
        height: 48px;
    }

    .service-icon-small svg {
        width: 24px;
        height: 24px;
    }

    .service-content-small h4 {
        font-size: 17px;
    }

    .service-content-small p {
        font-size: 13px;
    }

    .team-text h3 {
        font-size: 24px;
    }

    .team-text p {
        font-size: 15px;
    }

    .team-values {
        padding: 20px;
        gap: 12px;
    }

    .value-item span {
        font-size: 15px;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .cert-card {
        padding: 32px 24px;
    }

    .cert-icon svg {
        width: 48px;
        height: 48px;
    }

    .cert-card h3 {
        font-size: 18px;
    }

    .cert-card p {
        font-size: 13px;
    }

    .area-list h3 {
        font-size: 24px;
    }

    .area-items li {
        padding: 12px 0;
    }

    .area-items span {
        font-size: 14px;
    }

    .area-note {
        padding: 16px 18px;
    }

    .area-note p {
        font-size: 13px;
    }

    .btn-secondary {
        padding: 12px 28px;
        font-size: 15px;
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================================================
   响应式设计 - 小屏手机 (< 480px)
   ========================================================================== */

@media (max-width: 480px) {
    .section-title {
        font-size: 24px;
    }

    .section-subtitle {
        font-size: 15px;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-label {
        font-size: 14px;
    }

    .advantage-card {
        padding: 28px 20px;
    }

    .team-text h3 {
        font-size: 22px;
    }
}

/* ==========================================================================
   动画效果 - 优化版
   ========================================================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.stat-item,
.advantage-card,
.service-item,
.cert-card {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.stat-item:nth-child(1),
.advantage-card:nth-child(1),
.cert-card:nth-child(1) {
    animation-delay: 0.1s;
}

.stat-item:nth-child(2),
.advantage-card:nth-child(2),
.cert-card:nth-child(2) {
    animation-delay: 0.2s;
}

.stat-item:nth-child(3),
.advantage-card:nth-child(3),
.cert-card:nth-child(3) {
    animation-delay: 0.3s;
}

.stat-item:nth-child(4),
.advantage-card:nth-child(4),
.cert-card:nth-child(4) {
    animation-delay: 0.4s;
}

.advantage-card:nth-child(5) {
    animation-delay: 0.5s;
}

.advantage-card:nth-child(6) {
    animation-delay: 0.6s;
}