*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system,'Segoe UI',Roboto,'Microsoft YaHei',sans-serif}
body{background:#f5f8fc;color:#1a2332;line-height:1.5}
a{text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

::-webkit-scrollbar{width:4px}
::-webkit-scrollbar-track{background:#eef2f7}
::-webkit-scrollbar-thumb{background:linear-gradient(135deg,#1a237e,#0d47a1);border-radius:2px}

.top-nav{
    display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:space-between;
    padding:10px 16px;background:rgba(255,255,255,0.88);backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(255,255,255,0.3);position:sticky;top:0;z-index:100
}
.logo{font-size:18px;font-weight:700;background:linear-gradient(135deg,#1a237e,#0d47a1);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-link a{
    margin:0 8px;font-size:15px;color:#1a2332;font-weight:500;
    transition:color 0.3s;position:relative
}
.nav-link a:hover{color:#1a237e}
.tel-text{color:#1a237e;font-weight:700;font-size:16px;background:#e8edf9;padding:4px 12px;border-radius:16px}

.btn{
    display:inline-block;padding:10px 24px;border-radius:50px;
    font-size:14px;font-weight:600;border:0;cursor:pointer;
    transition:all 0.3s ease;text-align:center
}
.btn-primary{
    background:linear-gradient(135deg,#1a237e,#0d47a1);color:#fff;box-shadow:0 4px 12px rgba(26,35,126,0.25)
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(26,35,126,0.35)}
.btn-secondary{
    background:#eef2f7;color:#1a2332;box-shadow:0 2px 6px rgba(0,0,0,0.04)
}
.btn-secondary:hover{background:#e2e8f0}
.btn-white{
    background:#fff;color:#1a237e;box-shadow:0 4px 12px rgba(0,0,0,0.10)
}
.btn-white:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.15)}
.btn-danger{background:#e74c3c;color:#fff}
.btn-danger:hover{background:#c0392b}
.btn-sm{padding:4px 12px;font-size:12px;border-radius:6px;border:0;cursor:pointer;display:inline-block}

.banner{
    background:linear-gradient(135deg,#0d1b4a 0%,#1a237e 40%,#0d47a1 100%);
    border-radius:16px;padding:32px 20px;margin:20px 0;
    text-align:center;color:#fff;position:relative;overflow:hidden
}
.banner h2{font-size:24px;font-weight:700;margin-bottom:8px;position:relative;z-index:1}
.banner p{font-size:15px;opacity:0.9;margin-bottom:4px;position:relative;z-index:1}
.banner-desc{font-size:14px;opacity:0.75;margin:8px 0 20px;position:relative;z-index:1}
.banner-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}

.section-title{
    text-align:center;font-size:22px;font-weight:700;color:#1a2332;margin:30px 0 6px
}
.section-title span{background:linear-gradient(135deg,#1a237e,#0d47a1);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.section-subtitle{text-align:center;color:#8899aa;font-size:14px;margin-bottom:18px}

.row-four,.grid-four,.grid-three{
    display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:16px 0
}
.box-item,.service-card,.tech-card{
    background:#fff;padding:18px 14px;border-radius:14px;text-align:center;
    box-shadow:0 2px 8px rgba(0,0,0,0.04);transition:all 0.3s ease;border:1px solid rgba(0,0,0,0.02)
}
.box-item:hover,.service-card:hover,.tech-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(26,35,126,0.08)}
.box-item .icon,.service-card .icon{font-size:30px;display:block;margin-bottom:6px}
.box-item h4,.service-card h4{font-size:15px;color:#1a2332}
.box-item p,.service-card p{font-size:13px;color:#8899aa;margin-top:4px}

.area-box{
    background:linear-gradient(135deg,#e8edf9,#f0f4fe);padding:20px 16px;border-radius:14px;
    text-align:center;margin:24px 0 12px
}
.area-box h3{font-size:18px;color:#1a2332}
.area-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:10px}
.area-tags span{
    background:#fff;padding:4px 12px;border-radius:14px;font-size:13px;
    color:#1a2332;box-shadow:0 1px 4px rgba(0,0,0,0.04)
}

.price-hint{
    text-align:center;background:#fff;padding:14px;border-radius:14px;
    box-shadow:0 2px 8px rgba(0,0,0,0.04);margin:8px 0
}
.price-hint p{font-size:14px;color:#1a2332}
.price-hint .tag{
    display:inline-block;background:#e8edf9;padding:2px 10px;border-radius:10px;
    font-size:12px;color:#1a237e;margin:0 3px
}

.data-row{
    display:grid;grid-template-columns:repeat(4,1fr);gap:12px;text-align:center;margin:24px 0 8px
}
.data-item{
    background:#fff;padding:16px 12px;border-radius:14px;
    box-shadow:0 2px 8px rgba(0,0,0,0.04);transition:all 0.3s ease
}
.data-item h3{font-size:26px;font-weight:700;background:linear-gradient(135deg,#1a237e,#0d47a1);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.data-item p{font-size:13px;color:#8899aa;margin-top:2px}

.tech-avatar{font-size:38px;display:block;margin-bottom:4px}
.tech-card h4{font-size:16px;color:#1a2332}
.tech-card .area{font-size:13px;color:#8899aa}
.star{color:#f5a623;margin-top:4px;font-size:14px;letter-spacing:1px}

.review-item{
    background:#fff;padding:14px 18px;border-radius:14px;margin:10px 0;
    box-shadow:0 2px 8px rgba(0,0,0,0.04);border-left:3px solid #1a237e
}
.review-item .star{font-size:13px;margin:0}
.review-item .content{font-size:14px;color:#1a2332;margin-top:4px;line-height:1.5}
.review-item .meta{font-size:12px;color:#8899aa;margin-top:2px}

.bottom-cta{
    background:linear-gradient(135deg,#0d1b4a,#1a237e);border-radius:16px;
    padding:28px 20px;text-align:center;color:#fff;margin:30px 0 12px
}
.bottom-cta h3{font-size:20px;font-weight:700}
.bottom-cta p{font-size:14px;opacity:0.85;margin:8px 0 18px}
.bottom-cta .btn{font-size:14px;padding:10px 32px}

footer{
    margin-top:24px;padding:20px 0;text-align:center;
    border-top:1px solid #e8ecf1;color:#8899aa;font-size:13px
}
footer span{margin:0 6px}

.page-title{text-align:center;font-size:22px;font-weight:700;margin:20px 0 4px}
.page-title span{background:linear-gradient(135deg,#1a237e,#0d47a1);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-subtitle{text-align:center;color:#8899aa;margin-bottom:20px;font-size:14px}
.form-wrap{
    max-width:560px;margin:0 auto 30px;background:#fff;padding:28px 20px;
    border-radius:16px;box-shadow:0 4px 16px rgba(0,0,0,0.05)
}
.form-row{margin:14px 0}
.form-row label{display:block;font-weight:600;font-size:13px;color:#1a2332;margin-bottom:4px}
.form-row label .required{color:#e74c3c}
.form-row input,.form-row select,.form-row textarea{
    width:100%;padding:10px 14px;border:2px solid #e8ecf1;border-radius:10px;
    font-size:14px;transition:all 0.3s;background:#fafbfc;outline:none
}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{
    border-color:#1a237e;background:#fff;box-shadow:0 0 0 3px rgba(26,35,126,0.06)
}
.form-row textarea{min-height:80px;resize:vertical}
.msg{color:#e74c3c;text-align:center;padding:8px;background:#fef0ef;border-radius:8px;margin:10px 0;font-size:14px}

.order-result{margin-top:20px}
.order-result h3{font-size:17px;margin-bottom:12px}
.order-item{
    background:#f8fafc;padding:12px 16px;border-radius:10px;margin:8px 0;
    border-left:3px solid #1a237e
}
.order-item p{font-size:13px;color:#1a2332;margin:2px 0}

.success-page{text-align:center;padding:40px 0 20px}
.success-icon{font-size:60px;display:block;margin-bottom:12px}
.success-page h2{font-size:24px;color:#1a2332}
.success-page p{font-size:15px;color:#8899aa;margin:8px 0 20px}
.success-page .code-display{font-size:20px;font-weight:bold;color:#1a237e;background:#e8edf9;padding:6px 24px;border-radius:30px;display:inline-block;margin:6px 0}

/* ===== 商品样式 ===== */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;margin:16px 0}
.product-card{background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.04);transition:0.3s;border:1px solid #f0f2f5}
.product-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(26,35,126,0.08)}
.product-img{height:120px;background:#eef2f7;display:flex;align-items:center;justify-content:center;font-size:48px;color:#1a237e}
.product-info{padding:12px}
.product-name{font-size:14px;font-weight:600;color:#1a2332;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;height:40px}
.product-price{display:flex;gap:8px;margin:6px 0;align-items:baseline}
.product-price .sale{font-size:18px;font-weight:700;color:#e74c3c}
.product-price .original{font-size:13px;color:#999;text-decoration:line-through}
.product-stock{font-size:12px;color:#8899aa;margin-bottom:6px}
.btn-buy{display:block;text-align:center;background:linear-gradient(135deg,#1a237e,#0d47a1);color:#fff;padding:6px 0;border-radius:20px;font-size:13px;font-weight:600;transition:0.3s;border:0;width:100%;cursor:pointer}
.btn-buy:hover{opacity:0.85}
.section-header{display:flex;justify-content:space-between;align-items:center;margin:30px 0 6px}
.section-header h3{font-size:20px;font-weight:700}
.section-header a{font-size:14px;color:#1a237e}
.admin-form{max-width:600px;margin:20px auto;background:#fff;padding:24px;border-radius:16px;box-shadow:0 2px 12px rgba(0,0,0,0.04)}
.admin-form .form-row{margin-bottom:14px}
.admin-form label{font-weight:600;font-size:13px;display:block;margin-bottom:4px}
.admin-form input,.admin-form select,.admin-form textarea{width:100%;padding:10px;border:2px solid #e8ecf1;border-radius:10px;font-size:14px}
.admin-form .form-row-inline{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* ===== 后台表格 ===== */
.admin-login-box{max-width:400px;margin:40px auto;background:#fff;padding:30px;border-radius:16px;box-shadow:0 4px 20px rgba(0,0,0,0.06);text-align:center}
.admin-login-box input[type="password"]{width:100%;padding:12px;border:2px solid #e8ecf1;border-radius:10px;font-size:16px;margin:12px 0}
.admin-table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,0.04)}
.admin-table th{background:#1a237e;color:#fff;padding:12px 10px;text-align:left;font-size:13px}
.admin-table td{padding:10px;border-bottom:1px solid #eee;font-size:13px;vertical-align:middle}
.admin-table tr:hover{background:#f8f9fe}
.status-badge{display:inline-block;padding:2px 10px;border-radius:12px;font-size:12px;font-weight:600}
.status-待处理{background:#fef3e2;color:#b7791f}
.status-已接单{background:#e3f2fd;color:#0d47a1}
.status-维修中{background:#fff3e0;color:#e65100}
.status-已完工{background:#e8f5e9;color:#1b5e20}
.status-已取消{background:#fce4ec;color:#b71c1c}
.status-待付款{background:#fef3e2;color:#b7791f}
.status-已付款{background:#e3f2fd;color:#0d47a1}
.status-已发货{background:#e8f5e9;color:#1b5e20}
.status-已完成{background:#e8f5e9;color:#1b5e20}
.table-wrapper{overflow-x:auto}

/* ===== 响应式 ===== */
@media screen and (max-width:992px){
    .row-four,.grid-four,.grid-three{grid-template-columns:repeat(2,1fr);gap:12px}
}
@media screen and (max-width:768px){
    .container{padding:0 10px}
    .top-nav{flex-direction:column;text-align:center;padding:8px 12px;gap:4px}
   .nav-link a {
    margin: 0 6px;
    font-size: 15px;
    color: #1a2332;
}
    .tel-text{font-size:13px;padding:3px 10px}
    .banner{padding:24px 16px;margin:12px 0;border-radius:12px}
    .banner h2{font-size:20px}
    .banner p{font-size:14px}
    .banner-desc{font-size:13px;margin:6px 0 16px}
    .banner-buttons .btn{padding:8px 18px;font-size:13px}
    .section-title{font-size:18px;margin:20px 0 4px}
    .section-subtitle{font-size:13px;margin-bottom:12px}
    .row-four,.grid-four,.grid-three{grid-template-columns:repeat(2,1fr);gap:10px}
    .box-item,.service-card,.tech-card{padding:12px 8px;border-radius:10px}
    .box-item .icon,.service-card .icon{font-size:24px}
    .box-item h4,.service-card h4{font-size:13px}
    .box-item p,.service-card p{font-size:12px;margin-top:2px}
    .data-row{grid-template-columns:repeat(2,1fr);gap:8px}
    .data-item{padding:10px 8px}
    .data-item h3{font-size:20px}
    .data-item p{font-size:12px}
    .area-box{padding:16px 12px;margin:16px 0 8px}
    .area-box h3{font-size:16px}
    .area-tags span{font-size:12px;padding:3px 10px}
    .price-hint{padding:10px}
    .price-hint p{font-size:13px}
    .price-hint .tag{font-size:11px;padding:2px 8px}
    .review-item{padding:10px 14px;margin:6px 0;border-radius:10px}
    .review-item .content{font-size:13px}
    .review-item .meta{font-size:11px}
    .bottom-cta{padding:20px 16px;margin:20px 0 8px}
    .bottom-cta h3{font-size:17px}
    .bottom-cta p{font-size:13px;margin:6px 0 14px}
    .bottom-cta .btn{font-size:13px;padding:8px 24px}
    .form-wrap{padding:18px 14px;margin:0 0 20px}
    .form-row{margin:10px 0}
    .form-row label{font-size:12px}
    .form-row input,.form-row select,.form-row textarea{padding:8px 12px;font-size:13px}
    .page-title{font-size:18px;margin:12px 0 0}
    .page-subtitle{font-size:13px;margin-bottom:12px}
    footer{font-size:12px;padding:12px 0}
    .admin-table{font-size:12px}
    .admin-table th,.admin-table td{padding:6px 4px}
    .admin-actions select{font-size:11px;padding:2px 4px}
    .product-grid{grid-template-columns:repeat(2,1fr)}
    .admin-form .form-row-inline{grid-template-columns:1fr}
}
@media screen and (max-width:420px){
    .row-four,.grid-four,.grid-three{grid-template-columns:1fr 1fr;gap:6px}
    .box-item,.service-card,.tech-card{padding:10px 6px}
    .box-item .icon,.service-card .icon{font-size:20px}
    .box-item h4,.service-card h4{font-size:12px}
    .banner h2{font-size:18px}
    .banner p{font-size:13px}
}

/* 手机端：固定卡片尺寸，两列 */
@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
        /* 固定每个卡片宽度由列决定，不再伸缩 */
    }

    .product-card {
        max-width: 100% !important;
        min-width: 0 !important;
        /* 防止卡片撑大或缩小 */
    }

    /* 如果卡片内有图片，也固定 */
    .product-card .product-img {
        width: 100% !important;
        aspect-ratio: 1/1 !important; /* 正方形，不变形 */
        overflow: hidden;
    }

    .product-card .product-img img {
        width: 100% !important;
        height: 100% !important;
        object-fit: cover !important;
        display: block;
    }

    /* 文字部分固定，不换行溢出用省略号 */
    .product-card .product-name {
        font-size: 13px !important;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .product-card .product-price {
        font-size: 14px !important;
    }

    .product-card .product-stock {
        font-size: 12px !important;
    }

    .btn-buy {
        font-size: 13px !important;
        padding: 6px 12px !important;
        width: 100% !important;
        text-align: center;
        box-sizing: border-box;
    }
}

@media screen and (max-width:768px) {
    .tel-text {
        display: none !important;
    }
}