/* ============================================
   关于我们页（about.html）独立样式
   视觉风格与全站一致：紫色系渐变 + 毛玻璃卡片
   ============================================ */

.about-main {
    padding: 120px 20px 80px;
    max-width: 1200px;
    margin: 0 auto;
}

.about-hero {
    text-align: center;
    margin-bottom: 60px;
}

.about-hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-intro-card {
    background: var(--surface);
    border-radius: 30px;
    padding: 45px;
    margin-bottom: 40px;
    border: 1px solid rgba(199, 125, 255, 0.15);
    backdrop-filter: blur(10px);
}

.about-intro-card p {
    color: var(--text-body);
    font-size: 1.15rem;
    line-height: 2.2;
    margin: 0 0 22px;
}

.about-intro-card p:last-child {
    margin-bottom: 0;
}

.highlight-text {
    color: var(--color-primary);
    font-weight: 500;
}

.about-quote {
    text-align: center;
    padding: 50px 20px;
    margin-bottom: 50px;
}

.about-quote .quote-text {
    font-size: 1.5rem;
    color: var(--color-primary);
    font-style: italic;
    line-height: 1.8;
}

.about-quote .quote-text::before,
.about-quote .quote-text::after {
    content: '"';
    font-size: 2.5rem;
    color: rgba(199, 125, 255, 0.3);
}

.about-system {
    margin-bottom: 60px;
}

.about-system h2 {
    font-size: 2.2rem;
    margin-bottom: 35px;
    text-align: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 35px;
}

.system-card {
    background: var(--surface);
    border-radius: 24px;
    padding: 40px;
    border: 1px solid rgba(199, 125, 255, 0.15);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.system-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(199, 125, 255, 0.15);
}

.system-card h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.system-card p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 2;
    margin: 0;
}

@media (max-width: 768px) {
    .about-main {
        padding: 100px 15px 60px;
    }

    .about-hero h1 {
        font-size: 2.2rem;
    }

    .about-intro-card {
        padding: 30px;
    }

    .about-intro-card p {
        font-size: 1rem;
    }

    .about-quote .quote-text {
        font-size: 1.2rem;
    }

    .about-system h2 {
        font-size: 1.7rem;
    }

    .system-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .system-card {
        padding: 30px;
    }

    .system-card h3 {
        font-size: 1.4rem;
    }
}