html, body { overflow-x: hidden !important; }
    body.modal-open { overflow-y: hidden !important; }
    * { box-sizing: border-box; }

    .product-hero {
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        padding: 100px 0;
        position: relative;
    }

    .product-hero::before {
        content: '';
        position: absolute;
        top: 0; left: 0;
        width: 100%; height: 100%;
        background: rgba(0, 0, 0, 0.5);
    }

    .product-hero .container { position: relative; z-index: 1; }

    .product-hero h1 {
        margin-top: 150px;
        font-size: 3rem;
        font-weight: 700;
        color: #fff;
        width: 800px;
    }

    .product-hero p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.9);
        max-width: 600px;
        margin-top: 20px;
    }

    .business-card {
        padding: 80px 0 100px;
        background: #ffffff;
    }

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

    .biz-item {
        background: #fff;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
        transition: 0.3s ease;
    }

    .biz-item a {
        display: block;
        width: 100%;
        height: 100%;
        text-decoration: none;
    }

    .biz-item:hover {
        transform: translateY(-6px);
        box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
    }

    .biz-img {
        width: 100%;
        height: 220px;
        overflow: hidden;
    }

    .biz-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.4s ease;
    }

    .biz-item:hover .biz-img img { transform: scale(1.06); }

    .biz-text {
        padding: 24px 20px 28px;
        box-sizing: border-box;
    }

    .biz-text h4 {
        font-size: 20px;
        color: #1a1a2e;
        font-weight: 600;
        margin-bottom: 12px;
        display: -webkit-box;
        -webkit-line-clamp: 1;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .biz-text p {
        font-size: 15px;
        color: #6b7280;
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .section-header { margin: 0 auto 60px; }

    .section-title {
        font-size: 38px;
        font-weight: 700;
        color: #1a1a2e;
        letter-spacing: -0.5px;
        margin-bottom: 40px;
        position: relative;
    }

    .business-header {
        background-color: #ffffff;
        padding: 30px 0px;
        box-sizing: border-box;
        margin-bottom: 50px;
        display: flex;
        align-items: center;
    }

    .order-quiry {
        width: 150px;
        height: 70px;
        background-color: #2478e6;
        border-top-right-radius: 5px;
        border-bottom-right-radius: 5px;
        font-size: 17px;
        color: #fff;
        padding: 15px 10px;
        box-sizing: border-box;
        border: none;
        position: absolute;
        top: 0px; right: 0px;
    }

    .business-quiry {
        width: 160px;
        height: 70px;
        background-color: #2478e6;
        border-radius: 5px;
        font-size: 17px;
        margin-left: 50px;
        color: #fff;
        padding: 15px 10px;
        box-sizing: border-box;
        border: none;
    }

    .business-form-item {
        width: 85%;
        height: 70px;
        position: relative;
    }

    .business-form-item input {
        width: 100%;
        border: none;
        border: 1px solid #ccc;
        background: transparent;
        padding: 12px 15px;
        box-sizing: border-box;
        font-size: 17px;
        outline: none;
        border-radius: 5px;
        height: 70px;
    }

    .business-form-item input:focus { border-color: #2478e6; }

    @media (max-width: 992px) {
        .business-header { display: none; }
        .business-card { padding: 60px 0 80px; }
        .biz-img { height: 190px; }
        .product-hero h1 { font-size: 2.2rem; width: 100%; margin-top: 80px; }
        .product-hero p { max-width: 100%; }
    }

    @media (max-width: 768px) {
        .business-card { padding: 40px 0 60px; }
        .business-grid { grid-template-columns: 1fr; gap: 20px; }
        .biz-img { height: 170px; }
        .biz-text h4 { font-size: 18px; }
        .section-title { font-size: 26px; }
        .product-hero { padding: 80px 0; }
        .product-hero h1 { font-size: 1.8rem; }
    }

    @media (max-width: 480px) {
        .biz-text { padding: 18px 16px 22px; }
    }

    /* 留言弹窗 */
    .msg-modal {
        position: fixed;
        top: 0; left: 0;
        width: 100%; height: 100%;
        background: rgba(0, 0, 0, 0.6);
        display: none;
        align-items: center;
        justify-content: center;
        z-index: 99999;
        padding: 20px;
    }

    .msg-modal-box {
        background: #fff;
        width: 100%;
        max-width: 520px;
        border-radius: 16px;
        padding: 36px 32px;
        position: relative;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
        max-height: 90vh;
        overflow: hidden;
        display: flex;
        flex-direction: column;
    }

    .msg-form { flex: 1; overflow-y: auto; padding-right: 4px; }
    .msg-form::-webkit-scrollbar { display: none; }

    .msg-modal-close {
        position: absolute;
        right: 18px; top: 16px;
        font-size: 22px;
        cursor: pointer;
        color: #999;
        width: 28px; height: 28px;
        text-align: center;
        line-height: 28px;
        border-radius: 50%;
        transition: all 0.2s;
    }

    .msg-modal-close:hover { background: #f0f4fa; color: #2478e6; }

    .msg-modal-title {
        font-size: 20px;
        margin-bottom: 28px;
        text-align: center;
        color: #1a1a2e;
        font-weight: 600;
    }

    .msg-form .form-item {
        margin-bottom: 22px;
        position: relative;
        z-index: 10;
    }

    .msg-form input {
        width: 100%;
        border: none;
        border-bottom: 1px solid #ccc;
        background: transparent;
        padding: 12px 0;
        font-size: 16px;
        outline: none;
        transition: border-color 0.2s;
    }

    .msg-form input:focus { border-color: #2478e6; }
    .msg-form input::placeholder { color: #aaa; }

    .msg-submit-btn {
        width: 100%;
        padding: 16px;
        background: #2478e6;
        color: #fff;
        border: none;
        border-radius: 10px;
        font-size: 16px;
        cursor: pointer;
        transition: background 0.3s;
        font-weight: 500;
        margin-top: 8px;
    }

    .msg-submit-btn:hover { background: #68a4f1; }

    .custom-select-origin { display: none; }

    .custom-select-trigger {
        width: 100%;
        border: none;
        border-bottom: 1px solid #ccc;
        background: transparent;
        padding: 12px 0;
        padding-right: 24px;
        font-size: 16px;
        outline: none;
        transition: border-color 0.2s;
        cursor: pointer;
        background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3e%3cpath fill='%23999' d='M10.293 0.293L6 4.586 1.707 0.293A1 1 0 000.293 1.707l5 5a1 1 0 001.414 0l5-5a1 1 0 10-1.414-1.414z'/%3e%3c/svg%3e");
        background-repeat: no-repeat;
        background-position: right 0 top 50%;
        background-size: 12px auto;
        box-sizing: border-box;
    }

    .custom-select-trigger.active { border-color: #2478e6; }
    .custom-select-trigger.placeholder-text { color: #aaa; }

    .custom-select-dropdown {
        position: absolute;
        left: 0; right: 0;
        top: 100%;
        margin-top: 8px;
        background: #ffffff;
        border-radius: 10px;
        box-shadow: 0 6px 20px rgba(36, 120, 230, 0.15);
        z-index: 999999 !important;
        max-height: 260px;
        overflow-y: auto;
        display: none;
    }

    .custom-select-option {
        padding: 11px 14px;
        font-size: 15px;
        color: #333333;
        cursor: pointer;
        transition: background-color .18s ease;
    }

    .custom-select-option:hover { background-color: #eef4fd; }
    .custom-select-option.selected { background-color: #dce9fc; color: #2478e6; font-weight: 500; }