/* ============================================
   关于我们页面特定样式 - About Page Styles
   ============================================ */

body {
    background: #f8fafc;
}

/* Banner Section */
.about-banner {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 100px 20px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(24, 144, 255, 0.1);
}

.about-banner::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    top: -250px;
    right: -250px;
    border-radius: 50%;
}

.about-banner::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    border-radius: 50%;
}

.banner-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.banner-content h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-content p {
    font-size: 20px;
    color: var(--dark-gray);
    line-height: 1.8;
    max-width: 700px;
    margin: 0 auto;
}

/* Tabs Navigation */
.tabs-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.tabs-nav {
    display: flex;
    gap: 16px;
    margin-top: -40px;
    position: relative;
    z-index: 10;
    background: transparent;
    padding-bottom: 20px;
}

.tab-item {
    flex: 1;
    max-width: 280px;
    padding: 28px 24px;
    background: var(--white);
    border-radius: 12px 12px 0 0;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s ease;
    border-bottom: 2px solid transparent;
    position: relative;
}

.tab-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-blue);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.tab-item:hover {
    background: #fafbfc;
}

.tab-item.active {
    background: var(--white);
    border-bottom-color: var(--primary-blue);
}

.tab-item.active::after {
    transform: scaleX(1);
}

.tab-item .tab-icon-wrapper {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    background: #f0f7ff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    position: relative;
}

.tab-item:hover .tab-icon-wrapper {
    background: #e6f4ff;
}

.tab-item.active .tab-icon-wrapper {
    background: var(--primary-blue);
}

/* 现代扁平化图标 - 公司简介 */
.tab-item[data-tab="intro"] .tab-icon-wrapper::before {
    content: '';
    width: 24px;
    height: 24px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 4px;
    position: relative;
    transition: all 0.25s ease;
}
.tab-item[data-tab="intro"] .tab-icon-wrapper::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 4px;
    border-left: 2px solid var(--primary-blue);
    border-bottom: 2px solid var(--primary-blue);
    transform: rotate(-45deg);
    left: 50%;
    top: 50%;
    margin-left: -4px;
    margin-top: -6px;
    transition: all 0.25s ease;
}
.tab-item.active[data-tab="intro"] .tab-icon-wrapper::before,
.tab-item.active[data-tab="intro"] .tab-icon-wrapper::after {
    border-color: var(--white);
}

/* 品牌故事 */
.tab-item[data-tab="story"] .tab-icon-wrapper::before {
    content: '';
    width: 24px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 2px 2px 0 0;
    position: relative;
    transition: all 0.25s ease;
}
.tab-item[data-tab="story"] .tab-icon-wrapper::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--primary-blue);
    top: 8px;
    left: 50%;
    margin-left: -12px;
    transition: all 0.25s ease;
}
.tab-item.active[data-tab="story"] .tab-icon-wrapper::before,
.tab-item.active[data-tab="story"] .tab-icon-wrapper::after {
    border-color: var(--white);
    background: var(--white);
}

/* 使命愿景 */
.tab-item[data-tab="vision"] .tab-icon-wrapper::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    position: relative;
    transition: all 0.25s ease;
}
.tab-item[data-tab="vision"] .tab-icon-wrapper::after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-bottom: 6px solid var(--primary-blue);
    left: 50%;
    top: 50%;
    margin-left: -4px;
    margin-top: -2px;
    transition: all 0.25s ease;
}
.tab-item.active[data-tab="vision"] .tab-icon-wrapper::before,
.tab-item.active[data-tab="vision"] .tab-icon-wrapper::after {
    border-color: var(--white);
    border-bottom-color: var(--white);
}

/* 生态合作 */
.tab-item[data-tab="cooperation"] .tab-icon-wrapper::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    position: relative;
    transition: all 0.25s ease;
}
.tab-item[data-tab="cooperation"] .tab-icon-wrapper::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    margin-left: 4px;
    margin-top: -12px;
    transition: all 0.25s ease;
}
.tab-item.active[data-tab="cooperation"] .tab-icon-wrapper::before,
.tab-item.active[data-tab="cooperation"] .tab-icon-wrapper::after {
    border-color: var(--white);
}

.tab-item .tab-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
    transition: color 0.25s ease;
}

.tab-item.active .tab-title {
    color: var(--primary-blue);
}

.tab-item .tab-desc {
    font-size: 13px;
    color: var(--dark-gray);
    opacity: 0.65;
    transition: opacity 0.25s ease;
}

.tab-item.active .tab-desc {
    opacity: 0.85;
}

/* Content Area */
.content-wrapper {
    background: var(--white);
    border-radius: 0 12px 12px 12px;
    padding: 60px 40px;
    margin-bottom: 60px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    min-height: 500px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-in;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.content-section:last-child {
    margin-bottom: 0;
}

.content-section h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 3px solid var(--light-blue);
}

.content-section h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 32px 0 16px;
}

.content-section p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--dark-gray);
    margin-bottom: 16px;
    text-indent: 2em;
}

.content-section p:first-child {
    text-indent: 0;
}

.content-section ul {
    list-style: none;
    padding-left: 0;
}

.content-section ul li {
    padding: 12px 0 12px 28px;
    position: relative;
    font-size: 16px;
    line-height: 1.8;
    color: var(--dark-gray);
    border-left: 3px solid var(--light-blue);
    margin-bottom: 8px;
}

.content-section ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: 600;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin: 40px 0;
}

@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.stat-card {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
    padding: 32px 24px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid rgba(24, 144, 255, 0.1);
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(24, 144, 255, 0.15);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-label {
    font-size: 16px;
    color: var(--dark-gray);
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 40px 0;
}

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

.feature-card {
    background: var(--white);
    padding: 32px;
    border-radius: 12px;
    border: 2px solid var(--light-blue);
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(24, 144, 255, 0.15);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: #f0f7ff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all 0.25s ease;
    position: relative;
}

.feature-card:hover .feature-icon {
    background: var(--primary-blue);
    transform: translateY(-2px);
}

/* 现代扁平化图标 - 核心优势 */
.feature-icon[data-icon="speed"]::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-top: none;
    border-right: none;
    border-radius: 0 0 0 8px;
    position: relative;
    transform: rotate(-45deg);
    transition: all 0.25s ease;
}
.feature-icon[data-icon="speed"]::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2.5px;
    background: var(--primary-blue);
    left: 50%;
    top: 50%;
    margin-left: -4px;
    margin-top: -1px;
    transform: rotate(45deg);
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="speed"]::before,
.feature-card:hover .feature-icon[data-icon="speed"]::after {
    border-color: var(--white);
    background: var(--white);
}

.feature-icon[data-icon="target"]::before {
    content: '';
    width: 24px;
    height: 24px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    position: relative;
    transition: all 0.25s ease;
}
.feature-icon[data-icon="target"]::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--primary-blue);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    margin-left: -4px;
    margin-top: -4px;
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="target"]::before,
.feature-card:hover .feature-icon[data-icon="target"]::after {
    border-color: var(--white);
    background: var(--white);
}

.feature-icon[data-icon="shield"]::before {
    content: '';
    width: 18px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 2px 2px 8px 8px;
    border-top: none;
    position: relative;
    transition: all 0.25s ease;
}
.feature-icon[data-icon="shield"]::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    margin-left: -3px;
    margin-top: -3px;
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="shield"]::before,
.feature-card:hover .feature-icon[data-icon="shield"]::after {
    border-color: var(--white);
}

.feature-icon[data-icon="briefcase"]::before {
    content: '';
    width: 20px;
    height: 16px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 2px;
    position: relative;
    transition: all 0.25s ease;
}
.feature-icon[data-icon="briefcase"]::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 2.5px;
    background: var(--primary-blue);
    left: 50%;
    top: -4px;
    margin-left: -6px;
    border-radius: 2px;
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="briefcase"]::before,
.feature-card:hover .feature-icon[data-icon="briefcase"]::after {
    border-color: var(--white);
    background: var(--white);
}

.feature-icon[data-icon="tool"]::before {
    content: '';
    width: 20px;
    height: 20px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 2px;
    position: relative;
    transform: rotate(45deg);
    transition: all 0.25s ease;
}
.feature-icon[data-icon="tool"]::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    border: 2.5px solid var(--primary-blue);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    margin-left: -4px;
    margin-top: -4px;
    transform: rotate(-45deg);
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="tool"]::before,
.feature-card:hover .feature-icon[data-icon="tool"]::after {
    border-color: var(--white);
}

.feature-icon[data-icon="chart"]::before {
    content: '';
    width: 20px;
    height: 16px;
    border-left: 2.5px solid var(--primary-blue);
    border-bottom: 2.5px solid var(--primary-blue);
    position: relative;
    transition: all 0.25s ease;
}
.feature-icon[data-icon="chart"]::after {
    content: '';
    position: absolute;
    width: 4px;
    height: 8px;
    background: var(--primary-blue);
    left: 2px;
    bottom: -2px;
    border-radius: 1px;
    transition: all 0.25s ease;
}
.feature-card:hover .feature-icon[data-icon="chart"]::before,
.feature-card:hover .feature-icon[data-icon="chart"]::after {
    border-color: var(--white);
    background: var(--white);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 15px;
    color: var(--dark-gray);
    line-height: 1.6;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 40px;
    margin: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--light-blue);
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding-left: 32px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary-blue);
    border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--light-blue);
}

.timeline-year {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.timeline-content {
    font-size: 16px;
    color: var(--dark-gray);
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .banner-content h1 {
        font-size: 36px;
    }

    .banner-content p {
        font-size: 16px;
    }

    .tabs-nav {
        flex-direction: column;
        margin-top: -20px;
    }

    .tab-item {
        max-width: 100%;
        border-radius: 12px;
        margin-bottom: 8px;
    }

    .content-wrapper {
        padding: 40px 24px;
        border-radius: 12px;
    }

    .stats-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }
}