/* 页面头部 */
.page-header {
    text-align: center;
    padding: 6rem 10% 2rem;
    background: radial-gradient(circle at 50% 10%, rgba(56, 189, 248, 0.08) 0%, rgba(15, 23, 42, 0) 35%); 
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.h1-icon { display: inline-block; margin-right: 0.5rem; }

/* 内容区块 */
.content-section {
    padding: 2rem 5% 6rem;   /* 左右留白减半 */
    max-width: 1600px;       /* 增加宽度 */
    margin: 0 auto;
}

/* 关于卡片 */
.about-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    border: 1px solid var(--code-border);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.about-card h3 {
    color: var(--accent-primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.about-card p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-card p strong { color: var(--text-main); font-weight: 600; }

.about-card ul { list-style: none; padding-left: 0; margin-top: 1rem; }

.about-card li {
    position: relative;
    margin-bottom: 0.75rem;
    padding-left: 1.8rem;
    color: var(--text-main);
}

.about-card li::before {
    content: '→';
    color: var(--accent-secondary);
    font-weight: bold;
    position: absolute;
    left: 0;
    top: 0;
}

/* 页面特有的移动端适配 */
@media (max-width: 768px) {
    .content-section { padding: 2rem 5% 6rem; }
    .about-card { padding: 1.5rem; }
}