/* 钲耀钢铁 B 站 · 子页面共用样式
   与首页 index.html 同一套变量与视觉，首页保持单文件内联，子页面统一引这里。 */

:root{
  --navy:#0A2440; --navy-2:#0E3157; --navy-deep:#061A2E;
  --gold:#C9A44C; --gold-dark:#A9862F; --gold-soft:#E3C77E;
  --ink:#12263F; --text:#3D4C5E; --muted:#6E7F92;
  --line:#E3E9F0; --bg-soft:#F5F8FB; --white:#fff;
  --wx:#07C160; --wx-dark:#06A854;
  --radius:10px; --max:1180px;
  --shadow:0 2px 14px rgba(10,36,64,.07);
  --shadow-lg:0 10px 34px rgba(10,36,64,.13);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--text);background:var(--white);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* 顶栏 / 导航 */
.topbar{background:var(--navy-deep);color:#A9BDD2;font-size:13px}
.topbar .wrap{display:flex;gap:22px;align-items:center;height:38px;flex-wrap:wrap}
.topbar .sp{margin-left:auto}
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:26px;height:88px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand img{height:62px;width:auto}
.menu{display:flex;gap:22px;font-size:15px;color:var(--ink);margin-left:14px;flex-wrap:wrap}
.menu a{position:relative;padding:6px 0;font-weight:500;white-space:nowrap}
.menu a:hover,.menu a.on{color:var(--gold-dark)}
.menu a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--gold);transform:scaleX(0);transition:.25s}
.menu a:hover::after,.menu a.on::after{transform:scaleX(1)}
.nav-cta{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-tel{font-size:15px;font-weight:700;color:var(--navy);display:flex;align-items:center;gap:6px}
.nav-tel small{font-weight:400;font-size:12px;color:var(--muted)}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:42px;padding:0 20px;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;border:0;transition:.2s;white-space:nowrap}
.btn-wx{background:var(--wx);color:#fff}
.btn-wx:hover{background:var(--wx-dark)}
.btn-line{border:1px solid var(--line);color:var(--ink);background:#fff}
.btn-line:hover{border-color:var(--gold);color:var(--gold-dark)}
.btn-gold{background:var(--gold);color:#231A05}
.btn-gold:hover{background:var(--gold-dark);color:#fff}

/* 面包屑 */
.crumb{background:var(--bg-soft);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.crumb .wrap{display:flex;gap:8px;align-items:center;height:46px;overflow-x:auto;white-space:nowrap}
.crumb a:hover{color:var(--gold-dark)}
.crumb span.sep{color:#B9C6D4}

/* 页头 */
.phead{background:linear-gradient(160deg,#0A2440 0%,#0E3157 58%,#0A2440 100%);color:#fff;position:relative;overflow:hidden}
.phead::after{content:"";position:absolute;right:-140px;top:-160px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(201,164,76,.18),transparent 66%)}
.phead .wrap{position:relative;z-index:2;padding:52px 20px 46px}
.phead .kicker{font-size:12.5px;letter-spacing:.16em;color:var(--gold-soft);font-weight:700}
.phead h1{color:#fff;font-size:clamp(26px,3.6vw,40px);margin-top:12px;letter-spacing:-.4px}
.phead .lead{margin-top:16px;color:#C5D5E5;font-size:16px;line-height:1.9;max-width:780px}
.phead .chips{margin-top:22px;display:flex;gap:10px;flex-wrap:wrap}
.phead .chips span{font-size:13px;color:#DCE7F2;border:1px solid rgba(255,255,255,.22);padding:5px 12px;border-radius:99px}
.phead .acts{margin-top:26px;display:flex;gap:12px;flex-wrap:wrap}
.phead .acts .btn{height:46px;padding:0 22px}

/* 通用区块 */
section{padding:64px 0}
.sec-head{max-width:780px;margin-bottom:34px}
.sec-head .kicker{font-size:13px;letter-spacing:.14em;color:var(--gold-dark);font-weight:700;text-transform:uppercase}
.sec-head h2{font-size:clamp(22px,2.9vw,30px);margin-top:10px;letter-spacing:-.3px}
.sec-head p{margin-top:12px;color:var(--muted);font-size:15.5px;line-height:1.85}
.bg-soft{background:var(--bg-soft)}

/* 正文排版 */
.prose{max-width:840px}
.prose h2{font-size:clamp(21px,2.6vw,27px);margin:0 0 14px}
.prose h3{font-size:18px;margin:26px 0 10px}
.prose p{margin:0 0 14px;font-size:15.5px;line-height:1.95}
.prose ul{margin:0 0 16px;padding-left:20px;font-size:15.5px;line-height:1.95}
.prose li{margin-bottom:6px}

/* 规格表 */
.table-wrap{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
table.spec{width:100%;border-collapse:collapse;font-size:14.5px}
table.spec thead th{background:var(--navy);color:#fff;font-weight:600;text-align:left;padding:13px 14px;font-size:13.5px;letter-spacing:.02em;white-space:nowrap}
table.spec td{padding:11px 14px;border-top:1px solid var(--line);color:var(--ink)}
table.spec tbody tr:nth-child(even){background:#FAFCFE}
table.spec tbody tr:hover{background:#F2F7FC}
table.spec td:first-child{font-weight:600}
.tbl-scroll{overflow-x:auto}
.tbl-note{margin-top:12px;font-size:13px;color:var(--muted);line-height:1.8}

/* 卡片 / 网格 */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:var(--shadow)}
.card h3{font-size:16.5px}
.card p{margin-top:9px;font-size:14px;color:var(--muted);line-height:1.8}
.card .num{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:7px;background:rgba(201,164,76,.16);color:var(--gold-dark);font-size:12.5px;font-weight:700;font-style:normal}

/* 产品卡（列表页） */
.pcard{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;transition:.26s;box-shadow:var(--shadow)}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#D6DFE9}
.pcard .pic{aspect-ratio:4/3;overflow:hidden;background:#DDE5EE;position:relative}
.pcard .pic img{width:100%;height:100%;object-fit:cover;transition:.5s}
.pcard:hover .pic img{transform:scale(1.05)}
.pcard .pic.is-empty{background:linear-gradient(135deg,#17395C,#0A2440 60%,#08203A);display:flex;align-items:center;justify-content:center}
.pcard .pic.is-empty::before{content:attr(data-no);font-size:56px;font-weight:800;color:rgba(201,164,76,.18);letter-spacing:-2px}
.pcard .no{position:absolute;left:12px;top:12px;background:rgba(6,26,46,.78);color:var(--gold-soft);font-size:12px;font-weight:700;padding:3px 9px;border-radius:5px}
.pcard .body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.pcard h3{font-size:17.5px;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.pcard h3 span{font-size:11px;font-weight:500;color:#9BAABA;letter-spacing:.04em;text-transform:uppercase}
.pcard .meta{margin-top:10px;font-size:13.5px;color:var(--muted);line-height:1.7}
.pcard .go{margin-top:auto;padding-top:14px;font-size:14px;font-weight:600;color:var(--gold-dark);display:inline-flex;align-items:center;gap:5px}
.pcard:hover .go{color:var(--navy)}

/* 用途块（产品页） */
.use{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
.use-list{display:grid;gap:14px}
.use-item{border-left:2px solid var(--gold);padding:2px 0 2px 16px}
.use-item b{display:block;font-size:15.5px;color:var(--ink)}
.use-item span{display:block;margin-top:4px;font-size:14px;color:var(--muted);line-height:1.8}

/* 加工标签 */
.tags{display:flex;gap:10px;flex-wrap:wrap}
.tag-p{font-size:13.5px;color:var(--navy);background:#EEF3F8;border:1px solid var(--line);padding:7px 14px;border-radius:99px;transition:.2s}
a.tag-p:hover{border-color:var(--gold);color:var(--gold-dark);background:#fff}

/* FAQ */
.faq{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.faq details{border-bottom:1px solid var(--line)}
.faq details:last-child{border-bottom:0}
.faq summary{cursor:pointer;padding:16px 46px 16px 18px;font-size:15.5px;font-weight:600;color:var(--ink);position:relative;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:14px;font-size:20px;color:var(--gold-dark);font-weight:400;transition:.2s}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{color:var(--gold-dark)}
.faq .ans{padding:0 18px 18px;font-size:14.5px;color:var(--text);line-height:1.9}

/* 提示条 */
.notice{background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);border-radius:8px;padding:15px 18px;font-size:13.5px;color:var(--muted);line-height:1.85}

/* 询价区 */
.cta{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.cta::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(201,164,76,.16),transparent 68%)}
.cta .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center}
.cta h2{color:#fff;font-size:clamp(22px,3vw,32px)}
.cta .lead{margin-top:12px;color:#C0D0E0;font-size:15.5px;line-height:1.9;max-width:560px}
.cta dl{margin:26px 0 0;display:grid;gap:14px}
.cta dl>div{display:grid;grid-template-columns:84px 1fr;gap:14px;align-items:baseline}
.cta dt{font-size:13px;color:#8FA5BB}
.cta dd{margin:0;font-size:15.5px;color:#fff;font-weight:500}
.cta dd small{display:block;font-size:12.5px;color:#8FA5BB;font-weight:400;margin-top:2px}
.cta .acts{margin-top:24px;display:flex;gap:12px;flex-wrap:wrap}
.qr-card{background:#fff;border-radius:16px;padding:24px;text-align:center;color:var(--ink);box-shadow:var(--shadow-lg)}
.qr-card img{width:100%;max-width:210px;margin:0 auto;border-radius:8px}
.qr-card b{display:block;margin-top:14px;font-size:16px}
.qr-card span{display:block;margin-top:6px;font-size:13px;color:var(--muted)}

/* 相关链接 */
.rel{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rel a{display:block;background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px;transition:.22s}
.rel a:hover{border-color:var(--gold);box-shadow:var(--shadow)}
.rel b{display:block;font-size:15px;color:var(--ink)}
.rel span{display:block;margin-top:5px;font-size:13px;color:var(--muted);line-height:1.7}

/* 页脚 / 浮动 / 弹窗 */
footer{background:var(--navy-deep);color:#8FA5BB;font-size:13px;padding:32px 0 24px}
footer .wrap{display:flex;gap:20px;flex-wrap:wrap;align-items:center;justify-content:space-between}
footer a:hover{color:var(--gold-soft)}
.f-links{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:10px;width:100%}
.icp{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.float{position:fixed;right:18px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:10px}
.float button,.float a{width:54px;height:54px;border-radius:50%;border:0;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 20px rgba(6,26,46,.28);transition:.2s;font-size:12px;font-weight:700;color:var(--navy);background:#fff;flex-direction:column;line-height:1.1}
.float .f-wx{background:var(--wx);color:#fff}
.float .f-wx:hover{background:var(--wx-dark);transform:translateY(-2px)}
.float .f-share:hover,.float .f-tel:hover{transform:translateY(-2px);color:var(--gold-dark)}
/* 微信二维码浮动直达卡：桌面 hover 弹出，手机点击弹窗 */
.wx-item{position:relative}
.wx-item .qr-pop{position:absolute;right:66px;top:50%;transform:translateY(-50%) translateX(10px);width:200px;background:#fff;border-radius:14px;padding:12px 12px 10px;box-shadow:0 10px 34px rgba(6,26,46,.32);opacity:0;pointer-events:none;transition:.22s}
.wx-item:hover .qr-pop{opacity:1;pointer-events:auto;transform:translateY(-50%) translateX(0)}
.wx-item .qr-pop::after{content:"";position:absolute;right:-5px;top:50%;width:12px;height:12px;background:#fff;transform:translateY(-50%) rotate(45deg);border-radius:2px}
.wx-item .qr-pop img{width:100%;border-radius:8px;display:block}
.wx-item .qr-pop b{display:block;margin-top:8px;font-size:13px;color:var(--ink);text-align:center}
.wx-item .qr-pop span{display:block;font-size:12px;color:var(--muted);text-align:center;margin-top:2px}
@media (hover:none){.wx-item .qr-pop{display:none}}
.modal{position:fixed;inset:0;z-index:100;background:rgba(6,26,46,.72);display:none;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(3px)}
.modal.on{display:flex}
.modal-box{background:#fff;border-radius:16px;padding:26px;max-width:340px;width:100%;text-align:center;position:relative}
.modal-box img{width:100%;border-radius:8px}
.modal-box b{display:block;margin-top:14px;font-size:16px;color:var(--ink)}
.modal-box p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.8}
.modal-x{position:absolute;right:10px;top:8px;border:0;background:transparent;font-size:22px;color:#9BAABA;cursor:pointer;line-height:1}

/* 响应式 */
@media(max-width:980px){
  .menu{display:none}
  .grid-3,.grid-4,.rel{grid-template-columns:1fr 1fr}
  .grid-2,.use,.cta .wrap{grid-template-columns:1fr;gap:28px}
  .nav-tel{display:none}
}
@media(max-width:640px){
  section{padding:46px 0}
  .topbar .wrap{gap:12px;height:auto;padding:8px 0;font-size:12px}
  .topbar .sp{display:none}
  .nav .wrap{height:64px;gap:12px;justify-content:space-between}
  .brand img{height:40px}
  .grid-3,.grid-4,.rel,.grid-2{grid-template-columns:1fr}
  .phead .wrap{padding:38px 20px 34px}
  .phead .acts .btn{width:100%}
  .float{right:12px;bottom:14px;gap:8px}
  .float button,.float a{width:48px;height:48px}
  footer .wrap{flex-direction:column;align-items:flex-start;gap:10px}
}