/* 大连隆硕冶金科技有限公司官网 v1 */
:root{
  --c-primary:#e8641e;        /* 钢水橙 */
  --c-primary-d:#c94f10;
  --c-dark:#131a24;           /* 深钢灰蓝 */
  --c-dark2:#1b2432;
  --c-text:#24303e;
  --c-muted:#6b7684;
  --c-light:#f5f6f8;
  --c-line:#e3e7ec;
  --c-white:#fff;
  --shadow:0 10px 30px rgba(19,26,36,.10);
  --radius:10px;
  font-size:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--c-text);background:var(--c-white);line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 顶栏 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(19,26,36,.96);backdrop-filter:blur(8px);transition:.3s}
.header-inner{display:flex;align-items:center;height:64px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;flex-shrink:0}
.logo-img{width:36px;height:36px;object-fit:contain;flex-shrink:0}
.logo-text{font-size:18px;font-weight:800;letter-spacing:2px;line-height:1}
.nav{display:flex;gap:2px;margin-left:auto}
.nav a{color:#c6cdd6;font-size:14px;padding:8px 12px;border-radius:6px;transition:.2s;white-space:nowrap}
.nav a:hover,.nav a.active{color:#fff;background:rgba(255,255,255,.08)}
.header-tel{color:var(--c-primary);font-weight:700;font-size:16px;flex-shrink:0;margin-left:8px}
.menu-btn{display:none;background:none;border:0;cursor:pointer;padding:8px;flex-direction:column;gap:5px;margin-left:auto}
.menu-btn span{display:block;width:22px;height:2px;background:#fff;transition:.3s}

/* ===== 首屏 ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url("../img/hero.jpg") center/cover no-repeat;transform:scale(1.05)}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(13,18,26,.92) 0%,rgba(13,18,26,.72) 45%,rgba(13,18,26,.35) 100%)}
.hero-inner{position:relative;z-index:2;padding-top:110px;padding-bottom:70px}
.hero-tag{color:#f4a676;font-size:15px;letter-spacing:4px;margin-bottom:14px;font-weight:600}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.22;letter-spacing:2px;margin-bottom:16px}
.hero-sub{font-size:clamp(17px,2.2vw,24px);color:#e8ecf1;margin-bottom:14px;letter-spacing:2px}
.hero-desc{max-width:640px;color:#aab4c0;font-size:15px;margin-bottom:32px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 34px;border-radius:6px;font-size:15px;font-weight:600;transition:.25s;letter-spacing:1px}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-d);transform:translateY(-2px)}
.btn-ghost{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:56px;max-width:860px}
.stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:18px 16px;backdrop-filter:blur(4px)}
.stat strong{display:block;font-size:clamp(22px,2.6vw,32px);color:#ff9a5c;font-weight:800;font-variant-numeric:tabular-nums}
.stat span{font-size:13px;color:#c2cad4}

/* ===== 通用区块 ===== */
.section{padding:88px 0}
.section-dark{background:var(--c-dark);color:#dfe4ea}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.sec-head{text-align:center;margin-bottom:52px}
.sec-tag{color:var(--c-primary);font-size:13px;letter-spacing:5px;font-weight:700;margin-bottom:10px}
.sec-head h2{font-size:clamp(26px,3.4vw,36px);letter-spacing:2px;color:var(--c-dark);position:relative;display:inline-block;padding-bottom:16px}
.sec-head h2::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:52px;height:3px;background:var(--c-primary);border-radius:2px}
.sec-sub{color:var(--c-muted);margin-top:14px;font-size:15px}
.section-dark .sec-sub{color:#98a3b0}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}

/* 关于我们 */
.about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:start}
.about-text p{margin-bottom:16px;color:#3c4856;font-size:15.5px;text-align:justify}
.about-text strong{color:var(--c-primary)}
.step{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--c-line)}
.step:last-child{border-bottom:0}
.step-num{flex-shrink:0;width:46px;height:46px;background:linear-gradient(135deg,var(--c-primary),#f8934d);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.step h4{font-size:16px;color:var(--c-dark);margin-bottom:4px}
.step p{font-size:14px;color:var(--c-muted)}

/* 核心优势 */
.adv-card{background:var(--c-dark2);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:30px}
.adv-head{display:flex;align-items:center;gap:14px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.1)}
.adv-icon{width:46px;height:46px;border-radius:10px;background:linear-gradient(135deg,var(--c-primary),#f8934d);display:flex;align-items:center;justify-content:center;font-size:22px;color:#fff}
.adv-head h3{font-size:20px;letter-spacing:2px}
.adv-item{margin-bottom:18px}
.adv-item:last-child{margin-bottom:0}
.adv-item h5{color:#f4a676;font-size:15px;margin-bottom:6px;letter-spacing:1px}
.adv-item p{font-size:14px;color:#a8b2bd;text-align:justify}
.highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}
.hl{background:linear-gradient(160deg,rgba(232,100,30,.14),rgba(232,100,30,.03));border:1px solid rgba(232,100,30,.3);border-radius:var(--radius);padding:26px 24px}
.hl h4{font-size:16px;margin-bottom:10px;letter-spacing:1px}
.hl p{font-size:13.5px;color:#a8b2bd;text-align:justify}

/* 产品中心 */
.prod-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-bottom:56px}
.prod-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(19,26,36,.16)}
.prod-img{height:240px;overflow:hidden}
.prod-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.prod-card:hover .prod-img img{transform:scale(1.05)}
.prod-body{padding:26px 28px 30px;flex:1}
.prod-no{display:inline-block;background:#fdeee3;color:var(--c-primary-d);font-size:12px;font-weight:700;padding:3px 12px;border-radius:20px;margin-bottom:12px;letter-spacing:2px}
.prod-body h3{font-size:19px;color:var(--c-dark);margin-bottom:8px;line-height:1.4}
.prod-func{color:var(--c-primary);font-weight:700;font-size:14.5px;letter-spacing:1px;margin-bottom:14px;padding-bottom:14px;border-bottom:1px dashed var(--c-line)}
.prod-list li{position:relative;padding-left:20px;font-size:14px;color:#4a5563;margin-bottom:9px}
.prod-list li::before{content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;background:var(--c-primary);border-radius:2px;transform:rotate(45deg)}
.steel-grid{background:var(--c-light);border-radius:var(--radius);padding:36px 32px}
.steel-title{font-size:20px;color:var(--c-dark);text-align:center;margin-bottom:26px;letter-spacing:2px}
.steel-card{background:#fff;border-radius:var(--radius);padding:26px;border:1px solid var(--c-line);box-shadow:var(--shadow)}
.steel-card h4{color:var(--c-primary-d);font-size:16px;margin-bottom:10px}
.steel-card p{font-size:13.5px;color:#55606d;text-align:justify}
.steel-note{margin-top:22px;text-align:center;font-size:14px;color:var(--c-muted);border-top:1px dashed var(--c-line);padding-top:20px}

/* 应用领域 */
.app-card{background:var(--c-dark2);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:30px;transition:.3s}
.app-card:hover{border-color:rgba(232,100,30,.5);transform:translateY(-4px)}
.app-card h3{font-size:19px;margin-bottom:12px;letter-spacing:1px}
.app-card h3 span{color:var(--c-primary);margin-right:10px;font-weight:800}
.app-card p{font-size:14px;color:#a8b2bd;text-align:justify}
.app-val{margin-top:14px!important;color:#f4a676!important;font-weight:600;font-size:13.5px!important;letter-spacing:1px}

/* 工艺流程 */
.proc-card{background:#fff;border:1px solid var(--c-line);border-left:4px solid var(--c-primary);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.proc-card h3{font-size:18px;color:var(--c-dark);margin-bottom:14px;letter-spacing:1px}
.proc-card p{font-size:14px;color:#4a5563;margin-bottom:10px;text-align:justify}
.proc-card strong{color:var(--c-dark)}
.proc-num{font-size:30px!important;font-weight:800;color:var(--c-primary)!important;letter-spacing:1px}
.equip{margin-top:52px;background:var(--c-light);border-radius:var(--radius);padding:36px 32px}
.equip h3{font-size:20px;color:var(--c-dark);text-align:center;margin-bottom:26px;letter-spacing:2px}
.equip-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:24px 26px}
.equip-card h4{color:var(--c-primary-d);font-size:15.5px;margin-bottom:10px}
.equip-card p{font-size:14px;color:#55606d;text-align:justify}
.equip-note{margin-top:20px;text-align:center;font-size:14px;color:var(--c-muted)}

/* 效益分析 */
.benefit-sec{position:relative;overflow:hidden}
.benefit-bg{position:absolute;inset:0;background:url("../img/metal.jpg") center/cover no-repeat;opacity:.10}
.benefit-sec .container{position:relative;z-index:2}
.ben-card{background:var(--c-dark2);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:32px 26px;text-align:center}
.ben-card h4{font-size:16px;letter-spacing:2px;color:#c2cad4;margin-bottom:16px}
.ben-num{font-size:30px;font-weight:800;color:var(--c-primary);margin-bottom:14px;font-variant-numeric:tabular-nums}
.ben-card p{font-size:13.5px;color:#a8b2bd;text-align:justify}
.ben-card.highlight{border-color:var(--c-primary);background:linear-gradient(160deg,rgba(232,100,30,.16),var(--c-dark2))}
.roi-grid{margin-top:24px}
.roi-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);padding:26px}
.roi-card h4{font-size:15.5px;margin-bottom:10px;color:#f4a676}
.roi-card p{font-size:13.5px;color:#a8b2bd;text-align:justify}

/* 技术许可 */
.lic-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.lic-card h3{font-size:19px;color:var(--c-dark);margin-bottom:18px;padding-bottom:14px;border-bottom:2px solid var(--c-primary);display:inline-block}
.lic-list li{position:relative;padding-left:24px;font-size:14.5px;color:#4a5563;margin-bottom:16px;text-align:justify}
.lic-list li::before{content:"";position:absolute;left:4px;top:10px;width:8px;height:8px;border-radius:50%;background:var(--c-primary)}
.lic-list strong{color:var(--c-dark)}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:36px}
.contact-card{background:var(--c-dark2);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:34px 24px;text-align:center;transition:.3s}
.contact-card:hover{border-color:rgba(232,100,30,.55);transform:translateY(-4px)}
.c-role{color:#98a3b0;font-size:13px;letter-spacing:2px;margin-bottom:8px}
.contact-card h3{font-size:24px;letter-spacing:3px;margin-bottom:12px}
.c-tel{display:inline-block;font-size:20px;font-weight:800;color:var(--c-primary);letter-spacing:1px}
.c-tel:hover{color:#ff9a5c}
.contact-info{text-align:center;color:#98a3b0;font-size:14px}
.contact-info p{margin-bottom:6px}

/* 页脚 */
.footer{background:#0d1219;color:#7d8894;padding:26px 0;font-size:13.5px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px}
.footer a:hover{color:#fff}
.float-tel{position:fixed;right:22px;bottom:26px;width:52px;height:52px;border-radius:50%;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(232,100,30,.45);z-index:90;transition:.25s}
.float-tel:hover{background:var(--c-primary-d);transform:scale(1.08)}

/* 资质证照 */
.qual-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.qual-card{text-align:center}
.qual-box{height:300px;background:rgba(255,255,255,.05);border:2px dashed rgba(255,255,255,.18);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;transition:.3s}
.qual-box:hover{border-color:var(--c-primary);background:rgba(232,100,30,.08)}
.qual-box span{color:#8a96a3;font-size:15px;letter-spacing:2px}
.qual-cap{margin-top:12px;font-size:14px;color:#c2cad4}
/* 客户案例 */
.case-wrap{background:var(--c-light);border-radius:var(--radius);padding:60px 20px;text-align:center}
.case-placeholder{display:inline-block;color:var(--c-muted);font-size:16px;letter-spacing:2px;border:2px dashed var(--c-line);border-radius:50px;padding:18px 46px}

/* 动效 */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1240px){
  .logo-img{width:34px;height:34px}
  .logo-text{font-size:15px}
  .nav a{padding:8px 9px}
}
@media (max-width:1024px){
  .nav{display:none;position:fixed;top:64px;left:0;right:0;background:var(--c-dark);flex-direction:column;padding:12px 20px 20px;gap:4px;box-shadow:0 14px 30px rgba(0,0,0,.35)}
  .nav.open{display:flex}
  .nav a{padding:12px 10px;font-size:15px;border-bottom:1px solid rgba(255,255,255,.06)}
  .menu-btn{display:flex}
  .header-tel{display:none}
  .about-grid{grid-template-columns:1fr}
  .prod-grid,.grid-2,.highlights{grid-template-columns:1fr}
  .grid-3,.contact-grid,.qual-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .footer-inner{justify-content:center;text-align:center}
}
@media (max-width:560px){
  .section{padding:64px 0}
  .steel-grid,.equip{padding:26px 20px}
  .prod-img{height:190px}
}

/* ===== 内容管理后台启用后新增（仅在有数据时生效，不影响原版式） ===== */
.qual-box.has-img{border-style:solid;border-color:var(--c-line);background:#fff}
.qual-box img{width:100%;height:100%;object-fit:cover;border-radius:calc(var(--radius) - 2px)}
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.case-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.case-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(19,26,36,.16)}
.case-img{height:230px;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover;transition:.5s}
.case-card:hover .case-img img{transform:scale(1.05)}
.case-body{padding:26px 28px 28px;flex:1}
.case-meta{color:var(--c-primary);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:10px}
.case-body h3{font-size:19px;color:var(--c-dark);margin-bottom:12px;line-height:1.4}
.case-text p{font-size:14px;color:#4a5563;margin-bottom:10px;text-align:justify}
.case-text p:last-child{margin-bottom:0}
.case-date{margin-top:14px;padding-top:14px;border-top:1px dashed var(--c-line);font-size:13px;color:var(--c-muted)}
@media (max-width:1024px){
  .case-grid{grid-template-columns:1fr}
}

/* 深色区块的板块大标题：.sec-head h2 的深色字在深色底上撞色看不清，此处以更高特异性覆盖为白色 */
.section-dark .sec-head h2{color:#fff}

/* ===== 可增长列表：分类筛选 + 分页（产品 / 资质证照 / 客户案例） ===== */
.list-filters{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:28px}
.chip{border:1px solid var(--c-line);background:#fff;color:#4a5563;font-size:13.5px;padding:7px 18px;border-radius:20px;cursor:pointer;font-family:inherit;transition:.2s}
.chip:hover{border-color:var(--c-primary);color:var(--c-primary-d)}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600}
.section-dark .chip{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.16);color:#c2cad4}
.section-dark .chip:hover{border-color:var(--c-primary);color:#ff9a5c}
.section-dark .chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
[data-list-items].list-loading{opacity:.45;transition:opacity .2s}
.pager{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;margin-top:36px}
.pg-btn{min-width:38px;height:38px;padding:0 13px;border:1px solid var(--c-line);background:#fff;color:#4a5563;border-radius:8px;font-size:13.5px;font-family:inherit;cursor:pointer;transition:.2s}
.pg-btn:hover:not(:disabled){border-color:var(--c-primary);color:var(--c-primary-d)}
.pg-btn.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:700}
.pg-btn:disabled{opacity:.45;cursor:not-allowed}
.pg-gap{color:var(--c-muted);padding:0 2px}
.pg-info{margin-left:6px;font-size:13px;color:var(--c-muted)}
.section-dark .pg-btn{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.16);color:#c2cad4}
.section-dark .pg-btn:hover:not(:disabled){border-color:var(--c-primary);color:#ff9a5c}
.section-dark .pg-btn.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.section-dark .pg-info{color:#98a3b0}