* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Roboto, system-ui, sans-serif; background: #f7f9fc; color: #1e293b; }
header img,footer img{max-width: 100%;}
.banner-wrapper { height: 230px; overflow: hidden; /*background: url('../img/banner-6.jpg') no-repeat center center;*/ background-size: cover; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02); border: 1px solid #dce3ec; position: relative; }
.banner-pvc { background: url('../img/banner-2.jpg') no-repeat center center;  }
.banner-XLPE { background: url('../img/banner-4.jpg') no-repeat center center;  }
.banner-photovoltaic { background: url('../img/banner-3.jpg') no-repeat center center;  }
.banner-EPR { background: url('../img/banner-6.jpg') no-repeat center center;  }
.banner-center { height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center; }
.banner-center .tag { background-color: #0b2a4a; color: white; font-size: 14px; padding: 5px 20px; border-radius: 30px; display: inline-block; margin-bottom: 13px; font-weight: 500; }
.banner-center h1 { font-size: 38px; padding: 10px 30px; border-radius: 40px; font-weight: 600; color: #0b1f33;  margin-bottom: 8px; background-color: rgba(255,255,255,0.8);  }
.banner-center h1 span { color: #1f4a7a; }
.banner-badge { background: #0b2a4a; color: white; padding: 13px 29px; border-radius: 80px; font-weight: 600; font-size: 16px; display: flex; align-items: center; gap: 13px; box-shadow: 0 6px 16px rgba(11, 42, 74, 0.12); }
.banner-badge i { font-size: 18px; opacity: 0.8; }
.page-wrap { margin: 19px 32px 29px 32px; background: white; border-radius: 32px; box-shadow: 0 12px 40px rgba(0, 0, 0, 0.04); padding: 32px 32px 40px; }
/* Page Header */
.page-header { border-bottom: 2px solid #eef2f6; padding-bottom: 19px; margin-bottom: 32px; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; display: none; }
.page-header h2 { font-weight: 600; font-size: 30px; color: #0b1f33; letter-spacing: -0.3px;}
.page-header h2 small { font-size: 16px; font-weight: 400; color: #4b6a8b; margin-left: 16px; }
.page-header .badge-tag { background: #eef4fa; padding: 5px 19px; border-radius: 40px; color: #0b2a4a; font-size: 13px; font-weight: 500; white-space: nowrap; }
.card-overview { display: flex; gap: 24px; margin-bottom: 40px; }
.product-card { flex: 1; background: #ffffff; border-radius: 24px; padding: 21px 19px 24px; border: 1px solid #e6edf5; transition: all 0.2s ease; cursor: pointer; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.01); position: relative; }
.product-card:hover { border-color: #b4c8df; box-shadow: 0 8px 18px rgba(0, 20, 40, 0.04); transform: translateY(-3px); }
.product-card.active { border-color: #0b2a4a; background: #fafcff; box-shadow: 0 8px 20px rgba(11, 42, 74, 0.06); }
.product-card .card-badge { display: inline-block; background: #0b2a4a; color: white; font-size: 12px; font-weight: 600; padding: 2px 13px; border-radius: 40px; letter-spacing: 0.3px; margin-bottom: 10px; }
.product-card .card-title { font-size: 19px; font-weight: 700; color: #0b1f33; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.product-card .card-title .ratio { font-weight: 400; font-size: 12px; background: #eef2f7; padding: 2px 11px; border-radius: 30px; color: #2c4b6e; }
.product-card .card-title strong{ font-weight: bold!important; display:block;width: 100%;}
.product-card .card-sub { font-size: 13px; color: #2c4b6e; margin: 3px 0 10px 0; font-weight: 500; }
.product-card .card-desc { font-size: 14px; color: #3d5a79; line-height: 1.5; margin-bottom: 10px; border-left: 2px solid #dce3ec; padding-left: 11px;display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp: 3;  overflow: hidden;text-overflow: ellipsis; }
.product-card .card-app { font-size: 12px; color: #1f4a7a; background: #f1f6fc; padding: 3px 11px; border-radius: 30px; display: inline-block; margin-top: 3px; }
.product-card .click-hint { font-size: 10px; color: #889fbb; margin-top: 10px; display: flex; justify-content: flex-end; align-items: center; gap: 3px; border-top: 1px dashed #e2e9f2; padding-top: 8px; }
/* .detail-panel { background: #fafcff; border-radius: 28px; border: 1px solid #e2eaf3; padding: 29px 32px 0px; margin-top: 13px; transition: all 0.15s; scroll-margin-top: 16px; } */
.detail-panel .detail-content { background: #fafcff; border-radius: 28px; border: 1px solid #e2eaf3; padding: 29px 32px 0px; margin-top: 13px; transition: all 0.15s; scroll-margin-top: 16px; }
.detail-panel .panel-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; margin-bottom: 24px; border-bottom: 1px solid #e2eaf3; padding-bottom: 10px; position: relative; }
.panel-header .panel-title { font-size: 22px; font-weight: 600; color: #0b1f33; }
.panel-header .panel-title .card-badge { display: inline-block; background: #0b2a4a; color: white;  font-weight: 600; padding: 2px 13px; border-radius: 40px; letter-spacing: 0.3px; margin-bottom: 10px; }
.panel-header .panel-sub { background: #eef4fa; padding: 3px 16px; border-radius: 40px; font-size: 13px; color: #0b2a4a; font-weight: 600; }
.panel-header .collapse-icon { display: flex; align-items: center; justify-content: center; width: 28px; height: 28px; background: rgba(42,125,225,0.10); border-radius: 50%; color: #2a7de1; font-size: 0.85rem; transition: all 0.35s ease; position: absolute; right: 10px; }
.spec-table-wrap { overflow-x: auto; margin: 8px 0 19px; }
.spec-table-title{display: flex; gap: 13px; flex-wrap: wrap; align-items: center; margin-bottom: 13px;}
.spec-table-title h3{font-weight:500; font-size: 18px; color:#0b2a4a;}
.spec-table-title h3 i{margin-right: 10px; font-size: 16px;}
.spec-table-content p{line-height: 1.2; margin-bottom: 10px; }
.spec-table-content .brand{background: #eef4fa; padding: 3px 16px; border-radius: 40px; font-size: 13px; color: #1f4a7a; }
.temp-row { display: flex; flex-wrap: wrap; gap: 3px 19px; background: white; padding: 10px 16px; border-radius: 40px; border: 1px solid #e2eaf3; margin: 5px 0; width: auto; }
.temp-row span { font-size: 13px; }
.temp-row .temp-label { color: #4b6a8b; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 500px; background: white; border-radius: 18px; overflow: hidden; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02); }
.spec-table th {font-size: 14px; background: #eef4fa; color: #0b2a4a; font-weight: 600; padding: 10px 13px; text-align: left; border-bottom: 1px solid #d6e0eb; }
.spec-table td { padding: 8px 13px; border-bottom: 1px solid #eef2f7;  border-right: 1px solid #eef2f7; vertical-align: middle; }
/* .spec-table tr:last-child td { border-bottom: none; } */
.spec-table .highlight { background: #f7faff; }
.perf-table-wrap { margin: 16px 0 26px; }
.perf-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 600px; background: white; border-radius: 18px; overflow: hidden; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02); }
.perf-table th {font-size: 14px; background: #eef4fa; color: #0b2a4a; font-weight: 600; padding: 10px 13px; text-align: left; border-bottom: 1px solid #d6e0eb; }
.perf-table td { padding: 8px 13px; border-bottom: 1px solid #eef2f7; vertical-align: middle; }
.perf-table tr:last-child td { border-bottom: none; }
.perf-table .highlight { background: #f7faff; }
.perf-table .sub { color: #4b6a8b; font-size: 12px; padding-left: 3px; }
/*  Use Methods */
.process-grid { display: flex; justify-content: space-around; background: #f7faff; border-radius: 20px; padding: 5px 20px; }
.process-item { flex: 1; display: flex; flex-direction: column; gap: 2px; margin: 20px; }
.process-item .label { font-size: 14px; color: #5d7b9c; text-transform: uppercase; letter-spacing: 0.3px; }
.process-item .value {  color: #0b2a4a;display:block }
/* Common Section */
.common-section { margin-top: 45px; display: none;}
.common-section h3 { font-weight: 600; color: #0b1f33; margin-bottom: 13px; font-size: 19px;  }
.tips{margin-top: 0.8rem; font-size:0.8rem; color:#4b6a8b; border-left: 3px solid #b4c8df; padding-left: 0.8rem; margin: 10px 0 15px 0px;}
.common-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 29px; background: #fafcff; padding: 24px 29px; border-radius: 24px; border: 1px solid #e6edf5; }
.common-grid .block p { font-size: 14px; line-height: 1.7; color: #2c4058; margin-bottom: 8px; }
.common-grid .block ul { list-style: none; font-size: 13px; color: #2c4058; }
.common-grid .block ul li { padding: 3px 0; border-bottom: 1px dashed #e2e9f2; }

@media (max-width: 768px) { 
    .page-wrap{margin: 10px;padding: 10px;border-radius: 12px;}
    .banner-wrapper{height: 150px;}
    .banner-center h1{font-size: 16px; text-align: center;}
    .banner-center .tag{font-size: 12px;}
    .page-header{margin-bottom: 15px;padding-bottom: 10px;}
    .page-header h2{font-size: 16px;}
    .page-header .badge-tag{font-size: 12px; margin-top: 5px;}
    .card-overview {flex-direction: column;gap: 10px; margin-bottom: 15px;border-radius: 12px;}
    .detail-panel .detail-content{border-radius: 12px;padding: 10px;}
    .panel-header .panel-title{font-size: 16px;}
    .product-card{padding: 10px;border-radius: 12px;}
    .product-card .card-badge{font-size: 12px;margin-bottom: 0px;}
    .product-card .card-title .ratio{display: none;}
    .product-card .card-desc{display: -webkit-box;-webkit-box-orient: vertical;-webkit-line-clamp: 2;  overflow: hidden;text-overflow: ellipsis; }
    .product-card .card-title{padding: 10px;font-size: 14px;}
    .perf-table-wrap{width: 100%;-webkit-overflow-scrolling: touch;overflow-x: auto;margin: 10px 0 15px;}
    .perf-table-wrap table{width: 100%;min-width: 600px;}
    .spec-table th{font-size: 14px;}
    .spec-table-title h3{font-size: 14px;}
    .spec-table-title h3 i{font-size: 12px;}
    .process-item{margin: 10px;}
    .common-section{margin-top: 20px;}
    .common-section h3{font-size: 14px;}
    .common-section h3 i{font-size: 12px;}
    .common-grid{padding: 10px;gap: 10px;}
    .common-grid .block p{margin-bottom: 4px;}
}