/* ============================================================
   About 全屏图片节 - 修复版
   修复：文字清晰可见 + 统计卡片整齐排列
   ============================================================ */

/* ----- 外层容器 ----- */
#about.full-page {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    display: flex;
    align-items: center;
    background-color: #0b2a4a;
}

/* ----- 背景图片 ----- */
#about .about-bg-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

/* ============================================================
   遮罩层（大幅加深，确保文字可读）
   ============================================================ */
#about .about-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    /* 加深遮罩，提高文字对比度 */
    background: linear-gradient(135deg, rgba(60, 100, 139, 0.88) 0%, rgba(34, 75, 116, 0.616) 40%, rgba(16, 34, 49, 0.233) 100%);
}

/* ============================================================
   装饰光晕
   ============================================================ */
#about .about-glow-1 {
    position: absolute;
    top: -30%;
    right: -5%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    animation: aboutGlowFloat1 12s ease-in-out infinite alternate;
}

#about .about-glow-2 {
    position: absolute;
    bottom: -25%;
    left: -3%;
    width: 350px;
    height: 350px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    animation: aboutGlowFloat2 10s ease-in-out infinite alternate-reverse;
}

#about .about-glow-3 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(43, 127, 193, 0.06) 0%, transparent 60%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    animation: aboutGlowPulse 8s ease-in-out infinite alternate;
}

@keyframes aboutGlowFloat1 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-30px, 20px) scale(1.1); }
}

@keyframes aboutGlowFloat2 {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(20px, -20px) scale(1.15); }
}

@keyframes aboutGlowPulse {
    0% { opacity: 0.5; transform: translate(-50%, -50%) scale(0.9); }
    100% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

/* ============================================================
   内容容器
   ============================================================ */
#about .container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 60px;
    box-sizing: border-box;
}

/* ============================================================
   网格布局：左文右图
   ============================================================ */
#about .about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    width: 100%;
}

/* ============================================================
   左侧文案（文字颜色全部调整为白色系，确保可读）
   ============================================================ */
#about .about-text {
    color: #ffffff;
    margin-left: -50px;
}

/* 标签 */
#about .about-badge {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: #9bd1ff;
    letter-spacing: 2px;
    margin-bottom: 12px;
    opacity: 0.9;
}

/* 标题 */
#about .section-title {
    font-size: 2.6rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
    margin-bottom: 8px;
}

#about .section-title span {
    font-weight: 400;
    color: #9bd1ff;
}

/* 主描述（加亮） */
#about .about-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.9); /* 从 0.8 提高到 0.9 */
    max-width: 540px;
    margin-bottom: 8px;
    line-height: 1.7;
}

/* 副描述 */
#about .about-desc-secondary {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.863); /* 从 0.65 提高到 0.7 */
    margin-bottom: 32px;
    line-height: 1.7;
}

/* ============================================================
   数据统计（使用 grid 整齐排列，宽度一致）
   ============================================================ */
#about .about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 四列等宽 */
    gap: 14px;
    margin-bottom: 36px;
    max-width: 520px;
}

#about .stat-item {
    background: rgba(255, 255, 255, 0.06); /* 半透明背景，增强可读 */
    border-radius: 12px;
    padding: 14px 12px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s ease;
}

#about .stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(155, 209, 255, 0.2);
}

#about .stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: #f5e56b;
    text-shadow: 0 0 30px rgba(245, 229, 107, 0.1);
    line-height: 1.2;
    display: block;
}

#about .stat-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.767);
    margin-top: 4px;
    letter-spacing: 0.5px;
    display: block;
}

/* ============================================================
   按钮
   ============================================================ */
#about .btn-about {
    display: inline-block;
    background: #ffffff;
    color: #0b2a4a;
    padding: 14px 44px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.25s;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    text-decoration: none;
    border: none;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

#about .btn-about:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 34px rgba(0, 0, 0, 0.25);
    background: #f0f7ff;
}

/* ============================================================
   右侧：图片占位
   ============================================================ */
#about .about-image-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

#about .about-image-content {
    width: 100%;
    max-width: 480px;
    aspect-ratio: 4/3;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.5);
    border: 2px dashed rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(4px);
    text-align: center;
    padding: 20px;
    gap: 12px;
}

#about .about-image-content i {
    font-size: 4rem;
    opacity: 0.4;
    color: #9bd1ff;
}

#about .about-image-content span {
    font-size: 0.9rem;
    letter-spacing: 1px;
    opacity: 0.6;
}

/* ============================================================
   响应式适配
   ============================================================ */
@media (max-width: 1024px) {
    #about .section-title {
        font-size: 2.2rem;
    }
    #about .about-grid {
        gap: 40px;
    }
    #about .about-stats {
        grid-template-columns: repeat(2, 1fr); /* 平板变成 2 列 */
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    #about.full-page {
        height: auto;
        min-height: 100vh;
        padding: 60px 0;
    }

    #about .container {
        padding: 0 24px;
    }

    #about .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    #about .section-title {
        font-size: 2rem;
    }

    #about .about-desc {
        max-width: 100%;
        font-size: 0.95rem;
    }

    #about .about-desc-secondary {
        font-size: 0.85rem;
    }

    #about .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
        max-width: 100%;
    }

    #about .stat-number {
        font-size: 1.5rem;
    }

    #about .stat-item {
        padding: 12px 8px;
    }

    #about .about-image-content {
        max-width: 100%;
        aspect-ratio: 4/3;
    }

    #about .about-glow-1 {
        width: 300px;
        height: 300px;
    }

    #about .about-glow-2 {
        width: 200px;
        height: 200px;
    }

    #about .about-glow-3 {
        width: 400px;
        height: 400px;
    }
}