/* ============================================================
   index.css — 首页专属样式
   上海昶巽机械设备有限公司
   ============================================================ */

/* ── 通用 Section ─────────────────────────────────────────── */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--color-bg-light);
}

.section-title {
    font-size: 36px;
    font-weight: 500;
    color: var(--color-dark);
    text-align: center;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-muted);
    text-align: center;
    line-height: 1.5;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

/* ── 英雄 Banner ──────────────────────────────────────────── */
.hero {
    position: relative;
    height: 600px;
    margin-top: var(--header-height);
    display: flex;
    align-items: center;
    overflow: hidden;
}

/* 背景图片 */
.hero-bg {
    position: absolute;
    inset: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transform: scale(1.04);
    animation: heroBgZoom 8s ease-out forwards;
}

@keyframes heroBgZoom {
    from { transform: scale(1.04); }
    to   { transform: scale(1); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

/* 内容 */
.hero-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

.hero-title {
    font-size: 60px;
    font-weight: 500;
    color: var(--color-white);
    line-height: 1;
    margin-bottom: 24px;
    white-space: nowrap;
    opacity: 0;
    transform: translateY(24px);
    animation: heroFadeUp 0.8s ease 0.4s forwards;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.4;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    animation: heroFadeUp 0.8s ease 0.6s forwards;
}

.hero-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(16px);
    animation: heroFadeUp 0.8s ease 0.8s forwards;
}

@keyframes heroFadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 24px;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 400;
    white-space: nowrap;
    transition: all var(--transition);
    border: 2px solid transparent;
}

.btn-dark {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-dark:hover {
    background: transparent;
    color: var(--color-white);
}

.btn-white {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: var(--color-white);
}

.btn-white:hover {
    background: transparent;
    color: var(--color-white);
}

/* ── 公司简介 ─────────────────────────────────────────────── */
.about-header {
    margin-bottom: 64px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-intro {
    font-size: 18px;
    color: var(--color-dark);
    line-height: 1.65;
    margin-bottom: 24px;
}

.about-item {
    margin-bottom: 24px;
}

.about-item:last-child {
    margin-bottom: 0;
}

.about-item h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-dark);
    margin-bottom: 8px;
    line-height: 1.5;
}

.about-item p {
    font-size: 16px;
    color: var(--color-muted);
    line-height: 1.625;
}

.about-image-wrap {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1),
                0 4px  6px -4px rgba(0,0,0,0.1);
    margin-top: 60px;
}

.about-image-wrap img {
    width: 100%;
    height: 390px;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.about-image-wrap:hover img {
    transform: scale(1.03);
}

/* ── 产品中心 ─────────────────────────────────────────────── */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    display: block;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    color: inherit;
    transition: transform var(--transition), box-shadow var(--transition);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-card-hover);
}

.product-img {
    width: 100%;
    aspect-ratio: 286 / 213;
    overflow: hidden;
    background: #f5f5f5;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
    transform: scale(1.07);
}

.product-name {
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-dark);
    text-align: center;
    line-height: 1;
}

/* ── 联系方式 ─────────────────────────────────────────────── */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 64px;
    margin-bottom: 24px;
}

.contact-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px 24px 28px;
    text-align: center;
    transition: transform var(--transition), box-shadow var(--transition);
}

.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card-hover);
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(3, 2, 19, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-dark);
    margin-bottom: 8px;
    line-height: 1.5;
}

.contact-value {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.4;
    word-break: break-all;
}

/* 业务咨询卡片 */
.inquiry-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 768px;
    margin: 0 auto;
}

.inquiry-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-dark);
    text-align: center;
    margin-bottom: 16px;
}

.inquiry-desc {
    font-size: 16px;
    color: var(--color-muted);
    text-align: center;
    margin-bottom: 24px;
    line-height: 1.5;
}

.inquiry-list {
    background: rgba(236, 236, 240, 0.5);
    border-radius: var(--radius-sm);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.inquiry-item {
    display: flex;
    gap: 12px;
    align-items: baseline;
}

.inquiry-item .bullet {
    font-size: 16px;
    color: var(--color-primary);
    flex-shrink: 0;
    line-height: 1.4;
}

.inquiry-item p {
    font-size: 14px;
    color: var(--color-dark);
    line-height: 1.5;
}

.inquiry-item strong {
    font-weight: 700;
}

/* ── 响应式：平板 ─────────────────────────────────────────── */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

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

    .hero-title {
        font-size: 44px;
    }

    .hero-subtitle {
        font-size: 20px;
    }
}

/* ── 响应式：移动端 ───────────────────────────────────────── */
@media (max-width: 768px) {
    .section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 26px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    /* Hero */
    .hero {
        height: auto;
        min-height: 480px;
        padding: 48px 0;
        align-items: center;
    }

    .hero-title {
        font-size: 28px;
        white-space: normal;
        line-height: 1.25;
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 15px;
        margin-bottom: 28px;
    }

    /* About */
    .about-header {
        margin-bottom: 36px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .about-image-wrap {
        margin-top: 0;
        margin-bottom: 32px;
        order: -1;
    }

    .about-image-wrap img {
        height: 220px;
    }

    /* Products */
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .product-name {
        font-size: 14px;
        padding: 12px;
    }

    /* Contact */
    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
        margin-top: 36px;
    }

    .contact-card {
        padding: 24px 16px;
    }

    .inquiry-card {
        padding: 24px 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 22px;
    }

    .hero-btns {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .products-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .contact-cards {
        grid-template-columns: 1fr 1fr;
    }
}