/* 中文源码说明：css/desktop/about.css 负责页面视觉样式、布局与响应式表现；修改时请同步检查相关调用与发布产物。 */

.page-header {
    background-color: #0a1128;
    padding: 180px 0 100px;
    color: white;
    text-align: center;
    background-image: linear-gradient(135deg, rgba(10, 17, 40, 0.95), rgba(28, 46, 100, 0.9)), url('https://cos.medicine.net/worldsleep/site-assets/v2/assets/images/20260127-110714.png');
    background-size: cover;
    background-position: center;
}

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 0;
    color: white;
}

.page-header p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
    margin: 0 auto;
}

.intro-section {
    padding: 100px 0;
    background: white;
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.intro-content h2 {
    font-size: 2.5rem;
    color: #0f172a;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

.intro-content h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: #cba174;
    margin: 15px auto 0;
    border-radius: 2px;
}

.intro-text {
    font-size: 1.1rem;
    line-height: 2;
    color: #4b5563;
    text-align: justify;
    margin-bottom: 30px;
}

.intro-highlight {
    font-weight: 700;
    color: #1e3a8a;
}

.pillars-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.pillar-item {
    background: white;
    border-radius: 12px;
    padding: 40px 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
    border-top: 4px solid #1e3a8a;
}

.pillar-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.pillar-item:nth-child(2) {
    border-top-color: #cba174;
}

.pillar-item:nth-child(3) {
    border-top-color: #0891b2;
}

.pillar-item:nth-child(4) {
    border-top-color: #10b981;
}

.pillar-item:nth-child(5) {
    border-top-color: #7c3aed;
}

.pillar-item:nth-child(6) {
    border-top-color: #d97706;
}

.pillar-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #f0f4ff;
    color: #1e3a8a;
}

.pillar-item:nth-child(2) .pillar-icon {
    background: #fffcf0;
    color: #cba174;
}

.pillar-item:nth-child(3) .pillar-icon {
    background: #e0faff;
    color: #0891b2;
}

.pillar-item:nth-child(4) .pillar-icon {
    background: #ecfdf5;
    color: #10b981;
}

.pillar-item:nth-child(5) .pillar-icon {
    background: #f5f3ff;
    color: #7c3aed;
}

.pillar-item:nth-child(6) .pillar-icon {
    background: #fffbeb;
    color: #d97706;
}

.pillar-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #1f2937;
    font-family: 'Noto Sans SC', sans-serif;
}

.pillar-item p {
    color: #6b7280;
    font-size: 1rem;
    line-height: 1.6;
}