:root {
    --about-container-glass-bg: rgba(255, 255, 255, 0.8);
    --about-container-glass-border: rgba(255, 255, 255, 0.2);
    --about-container-gradient-primary: linear-gradient(135deg, var(--about-container-brand-main), var(--accent));
    --about-container-blob-color: rgba(108, 92, 231, 0.15);
    --about-container-text-muted: #64748b;
    --about-container-card-bg: #ffffff;
    --about-container-shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --about-container-transition: all 0.3s ease;
    --about-container-brand-main: #6c5ce7;
    --about-container-brand-secondary: #a29bfe;
    --about-container-success: #00b894;
    --about-container-bg-dark: #1e293b;
}

/* Base Layout & Animations */
@keyframes about-container-fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes about-container-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px;
    position: relative;
    overflow: hidden; /* 防止移动端出现横向滚动条 */
}

/* Visual Background Elements */
.about-container .bg-blob {
    position: absolute;
    width: 400px;
    height: 400px;
    background: var(--about-container-blob-color);
    filter: blur(80px);
    border-radius: 50%;
    z-index: -1;
    top: -100px;
    right: -100px;
    animation: about-container-float 8s infinite ease-in-out;
}

/* Hero Section */
.about-container .hero-section {
    text-align: center;
    margin-bottom: 100px;
    animation: about-container-fadeInUp 0.8s ease-out;
}

.about-container .hero-section h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    background: var(--about-container-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
    margin-bottom: 20px;
}

.about-container .hero-section p {
    font-size: 1.25rem;
    color: var(--about-container-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* Content Sections with LSI H2 */
.about-container .content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.about-container .info-card {
    background: var(--about-container-card-bg);
    padding: 40px;
    border-radius: 24px;
    box-shadow: var(--about-container-shadow-lg);
    transition: var(--about-container-transition);
    border: 1px solid #f1f5f9;
    animation: about-container-fadeInUp 1s ease-out;
}

.about-container .info-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 30px 45px -10px rgba(108, 92, 231, 0.2);
}

.about-container h2 {
    color: var(--about-container-brand-main);
    font-size: 1.75rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-container .nlp-content {
    color: var(--about-container-text-muted);
    font-size: 1.1rem;
}

/* Dynamic Stats Section */
.about-container .stats-bar {
    background: var(--about-container-bg-dark);
    color: white;
    border-radius: 30px;
    padding: 50px;
    margin: 80px 0;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
    text-align: center;
}

.about-container .stat-item h3 {
    font-size: 2.5rem;
    color: var(--about-container-success);
    margin-bottom: 5px;
}

.about-container .stat-item p {
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.8rem;
}

/* Visual Asset Placeholder */
.about-container .icon-box {
    width: 60px;
    height: 60px;
    background: var(--about-container-brand-secondary);
    border-radius: 15px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

/* Mobile Optimization Queries */
@media (max-width: 768px) {
    .about-container {
        padding: 40px 15px;
    }

    .about-container .hero-section {
        margin-bottom: 60px;
    }

    .about-container .stats-bar {
        padding: 30px 20px;
        margin: 40px 0;
        border-radius: 20px;
    }

    .about-container .stat-item {
        flex: 1 1 40%; /* 手机端两列排列 */
    }

    .about-container .stat-item h3 {
        font-size: 1.8rem;
    }

    .about-container .info-card {
        padding: 25px;
    }

    .about-container .content-grid {
        grid-template-columns: 1fr; /* 强制单列 */
        gap: 20px;
    }
}