/* 上海索企电缆 */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:#1e293b;line-height:1.7;background:#fff}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{color:#0d2137;text-decoration:none}a:hover{color:#e67e22}
img{max-width:100%;height:auto}

.site-header{background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo img{height:45px}
.menu-toggle{display:none;background:none;border:none;font-size:14px;cursor:pointer;color:#0d2137;padding:8px 12px}
.main-nav ul{display:flex;list-style:none;gap:4px}
.main-nav a{display:block;padding:8px 16px;font-size:15px;color:#1e293b;border-radius:4px;transition:all .2s}
.main-nav a:hover,.main-nav a.active{background:#0d2137;color:#fff}

.hero{background:linear-gradient(135deg,#0d2137,#1a3a5c);color:#fff;padding:80px 0 60px;text-align:center}
.hero h1{font-size:2.5rem;margin-bottom:12px;font-weight:700}
.hero p{font-size:1.15rem;opacity:.85;max-width:700px;margin:0 auto 30px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-size:15px;font-weight:600;transition:all .25s}
.btn-primary{background:#e67e22;color:#fff}.btn-primary:hover{background:#d35400;color:#fff;transform:translateY(-1px)}
.btn-outline{border:2px solid rgba(255,255,255,.5);color:#fff}.btn-outline:hover{background:rgba(255,255,255,.1);color:#fff}

.section{padding:60px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.8rem;color:#0d2137;margin-bottom:8px}
.section-title p{color:#475569;font-size:15px}

.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.product-card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;overflow:hidden;transition:all .3s}
.product-card:hover{box-shadow:0 8px 25px rgba(0,0,0,.1);transform:translateY(-3px)}
.product-card-img{height:200px;display:flex;align-items:center;justify-content:center;background:#f5f6f8;padding:16px}
.product-card-img img{max-height:100%;max-width:100%;object-fit:contain}
.product-card-body{padding:16px}
.product-card-body h3{font-size:14px;font-weight:500;line-height:1.5;height:42px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}

.cat-tabs{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.cat-tab{padding:8px 20px;border-radius:20px;font-size:14px;background:#f5f6f8;color:#475569;transition:all .2s}
.cat-tab:hover,.cat-tab.active{background:#0d2137;color:#fff}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;overflow:hidden;transition:all .3s}
.news-card:hover{box-shadow:0 8px 25px rgba(0,0,0,.1)}
.news-card-img{height:180px;overflow:hidden}
.news-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.news-card:hover .news-card-img img{transform:scale(1.05)}
.news-card-body{padding:20px}
.news-card-body h3{font-size:16px;font-weight:600;margin-bottom:8px;line-height:1.4}
.news-card-body p{font-size:14px;color:#475569;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-card-body .date{font-size:12px;color:#94a3b8;margin-top:10px}
.news-list{display:flex;flex-direction:column;gap:20px}
.news-list-item{background:#fff;border:1px solid #e2e8f0;border-radius:8px;overflow:hidden;transition:all .3s}
.news-list-item:hover{box-shadow:0 4px 15px rgba(0,0,0,.08)}
.news-list-link{display:flex;text-decoration:none;color:inherit;padding:20px;gap:24px;align-items:flex-start}
.news-list-thumb{width:220px;min-width:220px;height:150px;overflow:hidden;border-radius:6px;flex-shrink:0}
.news-list-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.news-list-item:hover .news-list-thumb img{transform:scale(1.05)}
.news-list-body{flex:1;min-width:0;padding:2px 0}
.news-list-body h3{font-size:18px;font-weight:600;color:#0d2137;margin-bottom:10px;line-height:1.4;transition:color .3s}
.news-list-item:hover .news-list-body h3{color:#e67e22}
.news-list-body p{font-size:14px;color:#475569;line-height:1.7;margin-bottom:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-list-meta{display:flex;align-items:center;gap:16px}
.news-list-date{font-size:13px;color:#94a3b8}
.news-list-more{font-size:13px;color:#e67e22;font-weight:500}
@media(max-width:768px){.news-list-link{flex-direction:column;padding:16px;gap:14px}.news-list-thumb{width:100%;min-width:auto;height:200px}}


.pagination{display:flex;justify-content:center;gap:6px;margin-top:40px}
.pagination a,.pagination span{display:inline-block;padding:8px 14px;border:1px solid #e2e8f0;border-radius:4px;font-size:14px}
.pagination a:hover{background:#0d2137;color:#fff;border-color:#0d2137}
.pagination .current{background:#0d2137;color:#fff;border-color:#0d2137}

.page-banner{background:linear-gradient(135deg,#0d2137,#1a3a5c);color:#fff;padding:50px 0;text-align:center}
.page-banner h1{font-size:2rem;margin-bottom:8px}
.breadcrumb{font-size:14px;opacity:.8}
.breadcrumb a{color:rgba(255,255,255,.9)}.breadcrumb a:hover{color:#fff;text-decoration:underline}

.content-page{max-width:900px;margin:40px auto;padding:0 20px;line-height:2;font-size:15px}
.content-page h3{margin:24px 0 12px;color:#0d2137}
.content-page p{margin:12px 0}

.product-detail{max-width:1100px;margin:40px auto;padding:0 20px;display:grid;grid-template-columns:1fr 1fr;gap:40px}
.product-detail-img{display:flex;align-items:center;justify-content:center;background:#f5f6f8;border-radius:8px;padding:30px;min-height:400px}
.product-detail-img img{max-width:100%;max-height:450px;object-fit:contain}
.product-detail-info h1{font-size:1.5rem;color:#0d2137;margin-bottom:20px}
.product-detail-contact{margin-top:20px;padding:20px;background:#f5f6f8;border-radius:8px}
.product-detail-contact p{margin:4px 0}
.product-detail-content{max-width:1100px;margin:40px auto;padding:0 20px;line-height:2}
.product-detail-content h3{margin:20px 0 12px;color:#0d2137}
.product-detail-content table{width:100%;border-collapse:collapse;margin:16px 0}
.product-detail-content td,.product-detail-content th{border:1px solid #e2e8f0;padding:10px 14px;font-size:14px}
.product-detail-content th{background:#f5f6f8;font-weight:600}

.site-footer{background:#0d2137;color:rgba(255,255,255,.8);padding:50px 0 0;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-bottom:30px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin:8px 0}
.footer-col a{color:rgba(255,255,255,.7);font-size:14px}
.footer-col a:hover{color:#e67e22}
.footer-col p{font-size:14px;margin:4px 0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13px}
.footer-bottom a{color:rgba(255,255,255,.6)}

.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;max-width:1000px;margin:0 auto}
.contact-info p{margin:12px 0;font-size:16px}

.contact-advantages{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px;text-align:center}
.adv-card{background:#f5f6f8;border-radius:8px;padding:30px 20px;transition:all .3s}
.adv-card:hover{background:#0d2137;color:#fff;transform:translateY(-3px)}
.adv-card h3{font-size:1.1rem;margin:12px 0 8px}
.adv-card p{font-size:14px;opacity:.8}

@media(max-width:1024px){.product-grid{grid-template-columns:repeat(3,1fr)}.news-grid{grid-template-columns:repeat(2,1fr)}.contact-advantages{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.menu-toggle{display:block}.main-nav{display:none;position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid #e2e8f0;box-shadow:0 4px 12px rgba(0,0,0,.1)}.main-nav.open{display:block}.main-nav ul{flex-direction:column;padding:10px 0}.main-nav a{padding:12px 20px;border-radius:0}.hero h1{font-size:1.8rem}.product-grid{grid-template-columns:repeat(2,1fr);gap:12px}.news-grid{grid-template-columns:1fr}.product-detail{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.contact-grid{grid-template-columns:1fr}.contact-advantages{grid-template-columns:1fr}}
@media(max-width:480px){.product-grid{grid-template-columns:1fr}}


/* ====== 瀑布流卡片新闻区（方案D） ====== */
.news-section{background:#f8f8f8;padding:60px 0}
.news-section .section-title{text-align:center;margin-bottom:40px}
.news-section .section-title h2{font-size:1.8rem;color:#0d2137;margin-bottom:8px}
.news-section .section-title a{color:#1e5aa1;font-size:15px}
.news-section .section-title a:hover{color:#e67e22}

.masonry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.masonry-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s ease;text-decoration:none;color:inherit;display:block}
.masonry-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.masonry-card-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:#f0f0f0}
.masonry-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .35s}
.masonry-card:hover .masonry-card-img img{transform:scale(1.05)}
.masonry-card-tag{position:absolute;top:12px;left:12px;background:rgba(30,90,161,.85);color:#fff;font-size:12px;padding:4px 10px;border-radius:4px}
.masonry-card-body{padding:16px}
.masonry-card-body h4{font-size:16px;color:#1e5aa1;font-weight:600;line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.masonry-card-body p{font-size:14px;color:#666;line-height:1.7;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.masonry-card-meta{display:flex;justify-content:space-between;align-items:center}
.masonry-card-date{font-size:12px;color:#999}
.masonry-card-arrow{font-size:16px;color:#e67e22;font-weight:bold}

.masonry-filter{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin-bottom:30px}
.masonry-filter-tag{padding:8px 20px;border-radius:20px;font-size:14px;background:#f5f6f8;color:#475569;cursor:pointer;transition:all .2s;border:none;display:inline-block}
.masonry-filter-tag.active,.masonry-filter-tag:hover{background:#1e5aa1;color:#fff}

@media(max-width:768px){.masonry-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.masonry-grid{grid-template-columns:1fr}}