/* ================================================
   关于我们专用样式 - about.css
   藏后品牌官网
   ================================================ */

/* ---- 1. Banner 区 ---- */
.about-hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}
.about-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(17,31,77,0.65) 0%, rgba(17,31,77,0.4) 100%);
}
.about-hero-content {
    position: relative;
    z-index: 10;
    color: var(--color-white);
    max-width: 800px;
    padding: 0 20px;
}
.about-hero-tag {
    display: inline-block;
    color: var(--color-gold);
    font-family: var(--font-en);
    font-size: 1rem;
    letter-spacing: 0.3em;
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease both;
}
.about-hero-title {
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    animation: fadeInUp 0.8s 0.2s ease both;
    text-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.about-hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.15em;
    animation: fadeInUp 0.8s 0.4s ease both;
}
.about-hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    line-height: 0;
    z-index: 5;
}
.about-hero-wave svg {
    width: 100%;
    height: 40px;
    display: block;
}

/* ---- 2. 集团介绍区 & 页面两栏通用 ---- */
.about-intro, .about-factory {
    padding: 100px 0;
    background: var(--color-bg);
}
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 70px;
    align-items: flex-start;
}
.about-intro-text p {
    color: var(--color-text-light);
    font-size: 0.98rem;
    line-height: 1.9;
    margin-bottom: 20px;
}
.about-intro-text p strong {
    color: var(--color-primary);
    font-size: 1.1rem;
}
.about-intro-text .intro-p-main {
    font-size: 1.15rem;
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.8;
}

/* 带有金色和徽章的图片效果 */
.env-img-wrap {
    position: relative;
    border: 1px solid rgba(201,162,39,0.3);
    padding: 12px;
    border-radius: 4px;
    background: var(--color-white);
    box-shadow: var(--shadow);
}
.env-img-wrap img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    border-radius: 2px;
    transition: var(--transition);
}
.env-img-wrap:hover img {
    transform: scale(1.02);
}
.env-img-badge {
    position: absolute;
    bottom: -24px;
    right: -24px;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 18px 24px;
    border-radius: 2px;
    border: 1px solid var(--color-gold);
    box-shadow: 0 10px 30px rgba(17,31,77,0.3);
    text-align: center;
    z-index: 10;
}
.env-img-badge .num {
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1.2;
}
.env-img-badge .txt {
    display: block;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.1em;
}

/* ---- 3. 平台使命与初心 (暗色背景) ---- */
.about-mission {
    padding: 100px 0;
    background: linear-gradient(180deg, var(--color-primary-dark) 0%, #0d1b3e 100%);
    position: relative;
    overflow: hidden;
}
.about-mission::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        rgba(201,162,39,0.02) 20px,
        rgba(201,162,39,0.02) 40px
    );
    pointer-events: none;
}
.mission-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.mission-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(201,162,39,0.25);
    border-top: 4px solid var(--color-gold);
    border-radius: 4px;
    padding: 50px 36px;
    color: var(--color-white);
    transition: var(--transition);
}
.mission-card:hover {
    transform: translateY(-8px);
    background: rgba(255,255,255,0.07);
    border-color: var(--color-gold);
    box-shadow: 0 15px 40px rgba(0,0,0,0.3);
}
.mission-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-align: center;
}
.mission-card h3 {
    font-size: 1.3rem;
    color: var(--color-white);
    text-align: center;
    letter-spacing: 0.1em;
    margin-bottom: 4px;
}
.mission-desc {
    font-family: var(--font-en);
    font-size: 0.78rem;
    color: var(--color-gold);
    text-align: center;
    letter-spacing: 0.15em;
    margin-bottom: 24px;
    text-transform: uppercase;
}
.mission-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(201,162,39,0.4), transparent);
    margin-bottom: 28px;
}
.mission-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.mission-list li {
    font-size: 0.88rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.75);
}
.mission-list li span {
    color: var(--color-gold-light);
    font-weight: 600;
}
.mission-highlight {
    text-align: center;
    background: rgba(201,162,39,0.1);
    border: 1px solid rgba(201,162,39,0.2);
    padding: 20px 10px;
    border-radius: 2px;
}
.mission-highlight .zh {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-gold-light);
    letter-spacing: 0.12em;
    margin-bottom: 4px;
}
.mission-highlight .zh:last-of-type { margin-bottom: 12px; }
.mission-highlight .en {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.05em;
}

/* 经营理念网格 */
.values-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    text-align: center;
}
.value-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 12px 6px;
    border-radius: 2px;
    transition: var(--transition);
}
.value-item:hover {
    border-color: var(--color-gold);
    background: rgba(201,162,39,0.1);
}
.value-item .val-zh {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
    letter-spacing: 0.1em;
}
.value-item .val-en {
    display: block;
    font-size: 0.65rem;
    color: rgba(255,255,255,0.4);
    letter-spacing: 0.1em;
    margin-top: 2px;
}

/* ---- 4. 发展历程 (Timeline) ---- */
.about-history {
    padding: 100px 0;
    background: var(--color-white);
}
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 50px auto 0;
}
/* 中间竖线 */
.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background: linear-gradient(180deg, var(--color-gold-light) 0%, var(--color-primary) 50%, var(--color-gold) 100%);
    top: 0; bottom: 0;
    left: 50%;
    margin-left: -1px;
}
.timeline-item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}
/* 时间轴圆点 */
.timeline-dot {
    position: absolute;
    width: 16px;
    height: 16px;
    right: -8px;
    top: 26px;
    background-color: var(--color-white);
    border: 3px solid var(--color-gold);
    border-radius: 50%;
    z-index: 1;
    transition: var(--transition);
}
.timeline-item.right .timeline-dot {
    left: -8px;
}
.timeline-item:hover .timeline-dot {
    background-color: var(--color-gold);
    box-shadow: 0 0 10px var(--color-gold);
    transform: scale(1.2);
}

.timeline-item.left { left: 0; }
.timeline-item.right { left: 50%; }

.timeline-content {
    padding: 30px;
    background-color: var(--color-bg);
    border: 1px solid rgba(201,162,39,0.15);
    border-radius: 4px;
    position: relative;
    transition: var(--transition);
}
.timeline-content:hover {
    box-shadow: var(--shadow);
    border-color: var(--color-gold);
    transform: translateY(-2px);
}
.timeline-year {
    font-family: var(--font-en);
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--color-gold);
    line-height: 1;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.timeline-date {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-weight: 600;
    margin-bottom: 12px;
}
.timeline-content h4 {
    font-size: 1.15rem;
    color: var(--color-primary);
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: 0.05em;
}
.timeline-content p {
    font-size: 0.88rem;
    color: var(--color-text-light);
    line-height: 1.8;
}
.timeline-content p strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* ---- 5. 科研与工厂实力 ---- */
.about-factory {
    background: var(--color-bg);
}
.about-factory .about-grid {
    grid-template-columns: 1fr 1.1fr;
}
.about-factory-text p {
    color: var(--color-text-light);
    font-size: 0.98rem;
    line-height: 1.9;
    margin-bottom: 20px;
}
.about-factory-text p strong {
    color: var(--color-primary);
    font-weight: 700;
}

/* ---- 6. 总部环境展示 ---- */
.about-gallery {
    padding: 100px 0;
    background: var(--color-white);
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 50px;
}
.gallery-item {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    border: 1px solid rgba(201,162,39,0.15);
    background: var(--color-white);
    padding: 8px;
    transition: var(--transition);
}
.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    border-color: var(--color-gold);
}
.gallery-img {
    position: relative;
    overflow: hidden;
    border-radius: 2px;
    height: 260px;
}
.gallery-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}
.gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(17, 31, 77, 0.82);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}
.gallery-zoom {
    font-size: 2rem;
    color: var(--color-gold);
    transform: scale(0.6);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 10px;
}
.gallery-desc {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    transform: translateY(15px);
    transition: transform 0.4s ease;
}
.gallery-item:hover .gallery-img img {
    transform: scale(1.08);
}
.gallery-item:hover .gallery-overlay {
    opacity: 1;
}
.gallery-item:hover .gallery-zoom {
    transform: scale(1);
}
.gallery-item:hover .gallery-desc {
    transform: translateY(0);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    .about-factory .about-grid {
        grid-template-columns: 1fr;
    }
    .about-factory-img {
        order: 2;
    }
    .mission-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .env-img-wrap img {
        height: 380px;
    }
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    /* 手机端时间轴转为单侧竖线 */
    .timeline::after {
        left: 31px;
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 20px;
    }
    .timeline-item.right {
        left: 0%;
    }
    .timeline-dot {
        left: 23px !important;
        right: auto;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .gallery-img {
        height: 200px;
    }
    .env-img-badge {
        right: 12px;
        bottom: 12px;
        padding: 10px 16px;
    }
    .env-img-badge .num {
        font-size: 1.2rem;
    }
}