/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', '微软雅黑', sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 主色调 */
:root {
    --primary-blue: #1a73e8;
    --dark-blue: #1557b0;
    --light-bg: #f8f9fa;
    --container-width: min(1491px, 90%);
    --section-spacing: clamp(2rem, 5vw, 4rem);
}

/* 横幅区 */
.hero-header {
    width: 100%;
    min-height: 100vh;
    background: url('../../images/about/about-background-image.jpg') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    padding: 0 clamp(1rem, 5vw, 10%);
    margin-top: 72px;
}

.hero-content {
    width: 100%;
    max-width: var(--container-width);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(1rem, 3vw, 2rem);
}

.hero-header-title-left,
.hero-header-title-right {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-header-text {
    font-size: clamp(1rem, 2vw, 1.25rem);
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1rem;
    line-height: 1.6;
}

/* 主要内容区 */
.section-body {
    width: 100%;
    padding: var(--section-spacing) 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.section-body-title {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: clamp(1.5rem, 4vw, 3rem);
    color: var(--dark-blue);
}

.section-body > div {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

/* 资质展示区 */
.achievements {
    width: 100%;
    max-width: var(--container-width);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: clamp(1rem, 3vw, 2rem);
    padding: clamp(1rem, 3vw, 2rem);
    margin: 0 auto;
}

.achievement-card {
    background: white;
    padding: clamp(1.5rem, 3vw, 2rem);
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.achievement-card:hover {
    transform: translateY(-5px);
}

.achievement-icon {
    font-size: clamp(2rem, 4vw, 2.5rem);
    color: var(--primary-blue);
}

.achievement-number {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: bold;
    color: var(--dark-blue);
}

.achievement-card h3 {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: #333;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    :root {
        --container-width: 95%;
    }
}

@media (max-width: 768px) {
    .hero-header {
        min-height: 80vh;
    }

    .achievements {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .achievements {
        grid-template-columns: 1fr;
    }

    .hero-header {
        min-height: 70vh;
    }
}