/* ================================
   关于我们页面专用样式
   ================================ */

/* Hero Section */
.about-hero {
    height: 400px;
    background: linear-gradient(135deg, #013d8d 0%, #0250b8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.about-hero__content {
    text-align: center;
    color: white;
}

.about-hero__title {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.about-hero__subtitle {
    font-size: 20px;
    font-weight: 400;
    opacity: 0.95;
}

/* Tab Navigation */
.about-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
    border-bottom: 2px solid #e5e5e5;
}

.about-tabs__btn {
    padding: 15px 30px;
    background: none;
    border: none;
    font-size: 16px;
    font-weight: 500;
    color: #666;
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
}

.about-tabs__btn:hover {
    color: var(--primary-color);
}

.about-tabs__btn--active {
    color: var(--primary-color);
}

.about-tabs__btn--active::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-color);
}

/* Tab Content */
.about-tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.about-tab-content--active {
    display: block;
}

/* Company Introduction */
.company-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    padding: 40px 0;
    align-items: flex-start;
}

.company-intro__text {
    display: flex;
    flex-direction: column;
}

.company-intro__title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #1a1a1a;
}

.company-intro__paragraph {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #333;
}

.company-intro__paragraph--large {
    font-size: 18px;
}

.company-intro__stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

.company-intro__stat {
    flex: 1;
}

.company-intro__stat-number {
    color: var(--primary-color);
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
}

.company-intro__stat-label {
    font-size: 14px;
    color: #666;
}

.company-intro__image {
    flex-shrink: 0;
    max-width: 550px;
}

.company-intro__image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    display: block;
    object-fit: cover;
}

/* Culture Section */
.culture-section {
    padding: 0;
}

.culture-section__header {
    text-align: center;
    margin-bottom: 50px;
}

.culture-section__title {
    font-size: 32px;
    font-weight: 700;
    color: #1a1a1a;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.culture-card {
    padding: 40px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.culture-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-card__icon--vision {
    background: var(--primary-color);
}

.culture-card__icon--mission {
    background: var(--secondary-color);
}

.culture-card__icon--values {
    background: var(--accent-color);
}

.culture-card__icon-text {
    color: white;
    font-size: 36px;
    font-weight: 700;
}

.culture-card__title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #1a1a1a;
}

.culture-card__text {
    font-size: 15px;
    line-height: 1.6;
    color: #666;
    margin: 10px 0;
}

/* Goals Section */
.goals-section {
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    padding: 40px;
    border-radius: 12px;
}

.goals-section__title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #1a1a1a;
}

.goals-section__intro {
    text-align: center;
    font-size: 1.2rem;
    line-height: 1.8;
    color: #333;
    margin-bottom: 30px;
}

.goals-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.goals-item__title {
    color: var(--primary-color);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.goals-item__text {
    font-size: 15px;
    line-height: 1.6;
    color: #555;
}

/* Certifications */
.certifications-section__header {
    text-align: center;
    margin-bottom: 30px;
}

.certifications-section__title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #1a1a1a;
}

.certifications-section__subtitle {
    font-size: 18px;
    color: #666;
    margin-bottom: 50px;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.certification-card {
    padding: 30px;
    background: white;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}

.certification-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.certification-card__image {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    display: block;
}

.certification-card__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #1a1a1a;
}

.certification-card__text {
    font-size: 14px;
    color: #666;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .company-intro {
        gap: 40px;
    }

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

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

@media (max-width: 768px) {
    .about-hero {
        height: 300px;
    }

    .about-hero__title {
        font-size: 32px;
    }

    .about-hero__subtitle {
        font-size: 16px;
    }

    .about-tabs {
        flex-wrap: wrap;
        gap: 10px;
    }

    .about-tabs__btn {
        padding: 10px 15px;
        font-size: 14px;
    }

    .company-intro {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .company-intro__title {
        font-size: 24px;
    }

    .company-intro__paragraph {
        font-size: 15px;
    }

    .company-intro__stats {
        gap: 20px;
    }

    .company-intro__stat-number {
        font-size: 28px;
    }

    .culture-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .culture-card {
        padding: 30px 20px;
    }

    .goals-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .certifications-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .certifications-section__title {
        font-size: 24px;
    }

    .certifications-section__subtitle {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .about-hero__title {
        font-size: 28px;
    }

    .company-intro__stats {
        flex-direction: column;
        gap: 15px;
    }

    .culture-card__icon {
        width: 60px;
        height: 60px;
    }

    .culture-card__icon-text {
        font-size: 28px;
    }
}