/* ===== 工标工具网 全局样式（现代工业蓝） ===== */
:root{
  --blue:#2563eb; --blue2:#0ea5e9; --ink:#0f1e33; --gray:#5b6b84;
  --line:#e3e9f2; --bg:#f4f7fc; --card:#fff; --radius:14px;
  --shadow:0 1px 2px rgba(16,42,90,.05),0 8px 24px -12px rgba(16,42,90,.14);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:15px}
a{color:#1d63d8;text-decoration:none}
a:hover{color:#0a46a8}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 18px}
h1,h2,h3{line-height:1.35;margin:.3em 0}
h2{font-size:20px}
p{margin:.5em 0}

/* ---- 顶部 ---- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:0 1px 0 rgba(16,42,90,.03)}
.header-inner{display:flex;align-items:center;gap:26px;height:62px}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink)}
.logo-mark{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:16px;letter-spacing:.5px;background:linear-gradient(135deg,var(--blue),var(--blue2));box-shadow:0 4px 12px -3px rgba(37,99,235,.5)}
.logo-text b{display:block;font-size:17px;letter-spacing:1px}
.logo-text small{display:block;color:var(--gray);font-size:11px;letter-spacing:2px}
.main-nav{display:flex;gap:4px;flex:1}
.main-nav a{padding:8px 14px;border-radius:9px;color:#31425f;font-weight:600;font-size:15px}
.main-nav a:hover{background:#eef4ff}
.main-nav a.on{background:linear-gradient(135deg,#e8f0ff,#e0f2fe);color:#1552c7}
.top-search{display:flex;align-items:center;background:#f1f4fa;border:1px solid var(--line);border-radius:10px;padding:3px;width:300px}
.top-search input{border:0;background:transparent;outline:0;padding:7px 10px;flex:1;font-size:14px;color:var(--ink)}
.top-search button{border:0;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;border-radius:8px;padding:7px 14px;cursor:pointer;font-size:14px}
.top-search button:hover{filter:brightness(1.08)}
@media(max-width:900px){.header-inner{flex-wrap:wrap;height:auto;padding:10px 0;gap:10px}.top-search{width:100%;order:5}}

/* ---- Hero 搜索区 ---- */
.hero{background:linear-gradient(180deg,#eaf1fd,#f4f7fc 78%);padding:46px 0 40px;border-bottom:1px solid var(--line)}
.hero h1{margin:0 0 6px;font-size:30px;font-weight:800;letter-spacing:.5px;color:#12264a}
.hero-sub{color:#41557a;margin:0 0 18px}
.hero-form{display:flex;gap:10px;max-width:760px}
.hero-form input{flex:1;border:1px solid #c8d6ee;border-radius:12px;padding:14px 18px;font-size:16px;outline:0;background:#fff;box-shadow:var(--shadow)}
.hero-form input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.14)}
.hero-form button{border:0;background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;border-radius:12px;padding:0 28px;font-size:16px;cursor:pointer;font-weight:600;box-shadow:0 8px 18px -8px rgba(37,99,235,.65)}
.hero-form button:hover{filter:brightness(1.07)}
.hotwords{margin-top:14px;color:#64748b;font-size:13px}
.hotwords a{display:inline-block;margin:2px 10px 2px 0;color:#3b68c8;background:#fff;border:1px solid var(--line);border-radius:99px;padding:3px 12px}
.hotwords a:hover{border-color:var(--blue);color:var(--blue)}

/* ---- 通用区块 ---- */
.wrap.page{padding-top:26px;padding-bottom:50px}
.page-title{font-size:26px;font-weight:800;margin-bottom:4px;letter-spacing:.3px}
.lead{color:#41557a;max-width:860px}
.muted{color:#8494ac;font-size:13px}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin:34px 0 14px}
.sec-head h2{position:relative;padding-left:13px;font-size:20px}
.sec-head h2::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:5px;border-radius:3px;background:linear-gradient(180deg,var(--blue),var(--blue2))}
.more{font-size:13px;color:var(--blue)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);margin:16px 0}
.card h2{margin-top:0}
.card p:last-child{margin-bottom:0}

/* ---- 栏目大卡 ---- */
.big-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:26px}
.big-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;color:var(--ink);position:relative;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:8px;transition:.2s}
.big-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px -12px rgba(16,42,90,.25);border-color:#bcd3ff}
.big-card h3{margin:4px 0 0;font-size:18px}
.big-card p{color:var(--gray);font-size:13.5px;flex:1;margin:0}
.big-card i{font-style:normal;color:var(--blue);font-size:13px;font-weight:600}
.bc-ic{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;color:#fff}
.bc-std .bc-ic{background:linear-gradient(135deg,#3b82f6,#2563eb)}
.bc-mat .bc-ic{background:linear-gradient(135deg,#10b981,#059669)}
.bc-che .bc-ic{background:linear-gradient(135deg,#f59e0b,#ea580c)}
.bc-tool .bc-ic{background:linear-gradient(135deg,#8b5cf6,#6d28d9)}
@media(max-width:900px){.big-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.big-cards{grid-template-columns:1fr}}

/* ---- 统计条 ---- */
.stat-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:22px 0 6px}
.stat-i{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;text-align:center;box-shadow:var(--shadow)}
.stat-i b{display:block;font-size:24px;color:var(--blue);font-weight:800}
.stat-i span{color:var(--gray);font-size:13px}
@media(max-width:700px){.stat-bar{grid-template-columns:repeat(2,1fr)}}

/* ---- 通用卡片网格 ---- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:860px){.card-grid,.two-col{grid-template-columns:1fr}}

/* 单位卡 */
.unit-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.unit-card .uc-top{display:flex;align-items:center;gap:10px}
.unit-card h3{margin:0;font-size:17px}
.unit-card h3 a{color:var(--ink)}
.unit-card h3 a:hover{color:var(--blue)}
.unit-card small{display:block;color:#94a3c0;font-size:11px;margin-top:2px}
.uc-ic{min-width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px;color:#fff;background:linear-gradient(135deg,#60a5fa,#2563eb);flex:none}
.uc-syms{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.uc-syms a{font-size:12px;background:#f0f5ff;border:1px solid #dbe7ff;color:#3363b0;border-radius:7px;padding:2px 8px}
.uc-syms a:hover{background:#2563eb;color:#fff}

/* 材料网格 */
.mat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px}
.mat-cell{background:#fff;border:1px solid var(--line);border-radius:11px;padding:10px 13px;display:flex;flex-direction:column;gap:2px;transition:.15s}
.mat-cell:hover{border-color:#9dbdf5;box-shadow:0 6px 16px -10px rgba(37,99,235,.5);transform:translateY(-2px)}
.mat-cell b{font-size:15px;color:#1c2c4a}
.mat-cell span{font-size:12px;color:#8494ac}

/* 类别网格 */
.cls-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.cls-cell{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:13px 15px;display:flex;gap:13px;align-items:center;color:var(--ink);box-shadow:var(--shadow);transition:.15s}
.cls-cell:hover{border-color:#9dbdf5;transform:translateY(-2px)}
.cls-cell b{font-size:15px}
.cls-cell p{margin:0;color:#8494ac;font-size:12.5px}
.cls-no{flex:none;width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;color:#fff;background:linear-gradient(135deg,#f97316,#dc2626)}
.cls-cell:nth-child(2n) .cls-no{background:linear-gradient(135deg,#6366f1,#4f46e5)}
.cls-cell:nth-child(3n) .cls-no{background:linear-gradient(135deg,#10b981,#059669)}
.cls-cell:nth-child(4n) .cls-no{background:linear-gradient(135deg,#0ea5e9,#0369a1)}
.cls-grid.small{grid-template-columns:repeat(auto-fill,minmax(165px,1fr))}
.cls-grid.small .cls-cell{display:flex;flex-direction:column;align-items:flex-start;gap:2px}
.cls-grid.small .cls-no{width:34px;height:34px;font-size:13px;border-radius:9px;margin-bottom:4px}
.cls-grid.small b{font-size:13.5px}

/* 分组网格（标准/材料分类） */
.grow-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px}
.grow{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);color:var(--ink)}
.grow-h{display:flex;align-items:center;gap:10px}
.grow-h h3{margin:0;font-size:16.5px}
.grow-h small{color:#94a3c0}
.grow p{color:#64748b;font-size:13px;margin:8px 0 10px;min-height:40px}
.grow-tags{display:flex;flex-wrap:wrap;gap:5px}
.grow-tags a{font-size:12px;background:#f0f5ff;color:#3363b0;border-radius:6px;padding:1px 7px;border:1px solid #e0ebff}
.grow-tags a:hover{background:#2563eb;color:#fff}
.grow-mini p{min-height:0;font-size:12.5px}
.grow-mini{transition:.15s}
.grow-mini:hover{border-color:#9dbdf5;transform:translateY(-2px)}

/* ---- 换算器 ---- */
.converter{padding:22px}
.cv-hint{color:#64748b;font-size:13px;margin-bottom:14px}
.cv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media(max-width:860px){.cv-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.cv-grid{grid-template-columns:1fr}}
.cv-u{display:flex;align-items:center;gap:8px;border:1px solid var(--line);border-radius:11px;padding:6px 10px;background:#fbfcff}
.cv-u:focus-within{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.cv-name{min-width:86px}
.cv-name b{display:block;font-size:15px}
.cv-name span{color:#94a3c0;font-size:11px}
.cv-u input{flex:1;border:0;outline:0;background:transparent;font-size:15px;min-width:0;color:#12264a;font-variant-numeric:tabular-nums}
.cv-clear{font-size:11px;color:#b3bfd4;flex:none}
.cv-clear:hover{color:#dc2626}

/* ---- 列表/参考 ---- */
.rel-list{list-style:none;margin:6px 0 0;padding:0}
.rel-list li{padding:7px 0;border-bottom:1px dashed #e8edf5}
.rel-list li:last-child{border-bottom:0}
.rel-list a{display:block;color:#31425f}
.rel-list a b{color:#1c3f92}
.rel-list a:hover b{color:var(--blue)}
.rel-list small{color:#94a3c0;margin-left:6px;font-size:12px}
.two-col-list{columns:2;column-gap:28px}
@media(max-width:700px){.two-col-list{columns:1}}

.ref-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media(max-width:700px){.ref-list{grid-template-columns:1fr}}
.ref-li{background:#fff;border:1px solid var(--line);border-radius:11px;padding:12px 15px;display:flex;justify-content:space-between;align-items:center;gap:8px;color:#31425f;transition:.15s}
.ref-li:hover{border-color:#9dbdf5;transform:translateX(3px)}
.ref-li b{font-weight:600;font-size:14px}
.ref-li span{color:#94a3c0;font-size:12px;flex:none}

.rel-box{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:11px;padding:14px 18px;margin:18px 0}
.rel-box h3{margin:0 0 10px;font-size:16px}
.rel-box ul{list-style:none;margin:0;padding:0}
.rel-box ul li{padding:5px 0;border-bottom:1px dashed #eef2f8}
.rel-box ul li:last-child{border-bottom:0}

/* chip */
.chip-row{display:flex;flex-wrap:wrap;gap:8px}
.chip{background:#fff;border:1px solid var(--line);border-radius:99px;color:#3b68c8;padding:6px 14px;font-size:13px}
.chip:hover{border-color:var(--blue);background:#eff5ff}

/* ---- 表格 ---- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.mtable{border-collapse:collapse;width:100%;font-size:13px}
.mtable th,.mtable td{border:1px solid #e7ecf5;padding:6px 10px;text-align:right;white-space:nowrap}
.mtable thead th{background:linear-gradient(135deg,#2563eb,#3b82f6);color:#fff;font-weight:600}
.mtable tbody th{background:#f1f6ff;text-align:left;font-weight:600;position:sticky;left:0}
.mtable tbody td:hover{background:#eef4ff}
.dtable{width:100%;border-collapse:collapse;font-size:13.5px;background:#fff}
.dtable th,.dtable td{border:1px solid #e7ecf5;padding:8px 11px;text-align:left}
.dtable thead th{background:#f1f6ff;color:#1c3f92;font-weight:700}
.dtable tbody tr:nth-child(even){background:#fafcff}
.dtable a{color:#1c3f92;font-weight:600}
.ptable{width:100%;border-collapse:collapse;font-size:14.5px}
.ptable th,.ptable td{border:1px solid #e7ecf5;padding:9px 13px;text-align:left}
.ptable th{background:#f4f8ff;width:190px;color:#1c3f92;font-weight:600}
.ptable tr:nth-child(even) td{background:#fafcff}
.std-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.state{font-size:13px;border-radius:99px;padding:3px 13px;font-weight:700}
.state.ok{background:#e7f8ee;color:#0b7a43;border:1px solid #b7e9cc}
.state.no{background:#fdeaea;color:#b91c1c;border:1px solid #f6c6c6}
.note-p{background:#f7fafd;border-left:3px solid var(--blue);padding:10px 14px;border-radius:0 10px 10px 0;color:#31425f}

/* ---- 信息面板/空态/404/面包屑/分页 ---- */
.info-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:20px 0;box-shadow:var(--shadow)}
.info-panel h3{margin-top:0}
.info-panel ul{margin:0;padding-left:20px;color:#41557a}
.empty-state{background:#fff;border:1px dashed #c8d6ee;border-radius:var(--radius);padding:26px;text-align:center;color:#41557a;margin:14px 0}
.empty-state a{color:var(--blue)}
.crumb{font-size:13px;color:#94a3c0;margin:14px 0 2px}
.crumb a{color:#6b7ea0}
.crumb .sep{color:#c3cede}
.crumb .cur{color:#31425f;font-weight:600}
.pager{display:flex;gap:6px;flex-wrap:wrap;margin:20px 0}
.pager a,.pager span{min-width:34px;height:34px;display:flex;align-items:center;justify-content:center;border-radius:9px;border:1px solid var(--line);background:#fff;font-size:13px;padding:0 8px;color:#31425f}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager span.cur{background:var(--blue);color:#fff;border-color:var(--blue)}
.tick-list{margin:4px 0 0;padding-left:2px;list-style:none}
.tick-list li{position:relative;padding:5px 0 5px 24px;color:#41557a;border-bottom:1px dashed #f0f3f9}
.tick-list li:last-child{border-bottom:0}
.tick-list li::before{content:"";position:absolute;left:4px;top:12px;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,#60a5fa,#2563eb)}
.center-404{text-align:center;padding-top:70px}
.center-404 h1{font-size:76px;margin:0;color:#dbe4f4;font-weight:900;line-height:1}
.center-404 h2{margin:4px 0 8px}
.center-chips{justify-content:center}

/* SEO 内容区 */
.seo-zone{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:34px 0 0;box-shadow:var(--shadow)}
.seo-zone h2{color:#14284e;font-size:19px}
.seo-zone p{color:#42536f;font-size:14.5px;text-align:justify}

/* ---- 页脚 ---- */
.site-footer{background:#0d1b33;color:#9fb0cc;margin-top:50px;padding:34px 0 20px;font-size:13px}
.footer-links{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:14px}
.footer-links a{color:#c3d2ea;padding:4px 14px;border-radius:8px;background:rgba(255,255,255,.05)}
.footer-links a:hover{color:#fff;background:rgba(255,255,255,.12)}
.disclaimer{line-height:1.8;color:#7e90ad;border-top:1px solid rgba(255,255,255,.08);padding-top:14px;margin-top:10px}
.copyright{color:#5f7291;margin-top:10px;font-size:12px}