/* yaxing.biz 应急安全知识平台 —— ybiz- 主题样式（主色 #3a3a6b） */
:root{
  --ybiz-main:#3a3a6b;
  --ybiz-deep:#2b2b52;
  --ybiz-soft:#eef0f8;
  --ybiz-accent:#6a6ac2;
  --ybiz-text:#26263c;
  --ybiz-muted:#5c5c76;
  --ybiz-line:#dcdfee;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ybiz-text);background:#f5f6fb;line-height:1.8;font-size:16px}
a{color:var(--ybiz-main);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.ybiz-header{background:linear-gradient(135deg,var(--ybiz-deep),var(--ybiz-main));color:#fff;box-shadow:0 2px 10px rgba(43,43,82,.25)}
.ybiz-bar{max-width:1080px;margin:0 auto;padding:18px 20px 10px;display:flex;align-items:center}
.ybiz-logo{display:flex;flex-direction:column;line-height:1.25;color:#fff}
.ybiz-logo:hover{text-decoration:none}
.ybiz-logo-main{font-size:26px;font-weight:700;letter-spacing:1px}
.ybiz-logo-sub{font-size:13px;opacity:.85}
.ybiz-nav{max-width:1080px;margin:0 auto;padding:8px 20px 14px;display:flex;flex-wrap:wrap;gap:4px 18px}
.ybiz-nav a{color:#e6e7f5;font-size:15px;padding:2px 0;border-bottom:2px solid transparent}
.ybiz-nav a:hover{text-decoration:none;color:#fff;border-bottom-color:#fff}
.ybiz-nav a.ybiz-on{color:#fff;font-weight:700;border-bottom-color:#ffd98a}

/* breadcrumb */
.ybiz-crumb{max-width:1080px;margin:14px auto 0;padding:0 20px;font-size:13px;color:var(--ybiz-muted)}
.ybiz-crumb span{margin:0 6px;color:#b3b6cd}

/* main */
.ybiz-main{max-width:1080px;margin:0 auto;padding:24px 20px 40px}
.ybiz-hero{background:linear-gradient(120deg,var(--ybiz-soft),#fff);border:1px solid var(--ybiz-line);border-radius:14px;padding:26px 26px 20px;margin-bottom:22px}
.ybiz-hero h1{font-size:28px;color:var(--ybiz-deep);margin-bottom:14px;line-height:1.4}
.ybiz-hero-img{width:100%;height:auto;border-radius:10px;display:block}
.ybiz-main h2{font-size:21px;color:var(--ybiz-main);margin:26px 0 10px;padding-left:12px;border-left:4px solid var(--ybiz-accent)}
.ybiz-main h3{font-size:17px;color:var(--ybiz-deep);margin:16px 0 6px}
.ybiz-main p{margin:10px 0;color:var(--ybiz-text)}
.ybiz-lead{font-size:17px;color:#33334e;border-left:3px solid var(--ybiz-accent);padding-left:14px;margin:14px 0}

/* 场景条 */
.ybiz-scenes,.ybiz-cards,.ybiz-faq,.ybiz-people,.ybiz-steps,.ybiz-latest,.ybiz-rel{
  background:#fff;border:1px solid var(--ybiz-line);border-radius:12px;padding:20px 22px;margin:16px 0}
.ybiz-scene-row{display:flex;align-items:flex-start;gap:14px;padding:10px 0;border-bottom:1px dashed var(--ybiz-line)}
.ybiz-scene-row:last-child{border-bottom:none}
.ybiz-scene-tag{flex:0 0 auto;background:var(--ybiz-main);color:#fff;font-size:14px;padding:2px 12px;border-radius:14px}
.ybiz-scene-row p{margin:0;flex:1}

/* 预案卡 */
.ybiz-cards{display:flex;flex-wrap:wrap;gap:14px}
.ybiz-cards h2{flex-basis:100%}
.ybiz-card{flex:1 1 240px;display:flex;flex-direction:column;gap:6px;background:var(--ybiz-soft);border:1px solid var(--ybiz-line);border-radius:10px;padding:16px 18px;transition:transform .15s}
.ybiz-card:hover{text-decoration:none;transform:translateY(-3px);border-color:var(--ybiz-accent)}
.ybiz-card b{font-size:18px;color:var(--ybiz-main)}
.ybiz-card span{font-size:14px;color:var(--ybiz-muted);line-height:1.6}

/* FAQ */
.ybiz-qa{border-bottom:1px dashed var(--ybiz-line);padding:8px 0}
.ybiz-qa:last-child{border-bottom:none}
.ybiz-qa h3{color:var(--ybiz-main)}

/* 步骤 */
.ybiz-steps ol{margin:8px 0 0 22px}
.ybiz-steps li{margin:6px 0}

/* 列表 */
.ybiz-artlist{margin:8px 0 0 20px}
.ybiz-artlist li{margin:6px 0}
.ybiz-artlist a{color:var(--ybiz-text)}
.ybiz-artlist a:hover{color:var(--ybiz-main)}

/* 内容速览 */
.key-points{background:#f0f2fb;border:1px solid var(--ybiz-line);border-radius:10px;padding:14px 18px;margin:18px 0}
.key-points b{color:var(--ybiz-deep);font-size:16px}
.key-points ul{margin:6px 0 0 20px}
.key-points li{margin:4px 0;font-size:15px;color:#33334e}

/* 结论条 */
.ybiz-conc{background:#fdf6e7;border-left:3px solid #e0a83c;padding:12px 16px;border-radius:0 8px 8px 0;margin:18px 0}

/* 结尾 */
.ybiz-end{margin-top:20px;color:var(--ybiz-muted);font-size:15px}

/* 相关阅读 */
.ybiz-rel h2{margin-top:0}

/* footer 2 栏 */
.ybiz-footer{background:linear-gradient(135deg,var(--ybiz-deep),#1f1f3d);color:#c9cbe2;margin-top:40px;padding:28px 20px 20px}
.ybiz-foot-cols{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.ybiz-foot-col{display:flex;flex-direction:column;gap:6px}
.ybiz-foot-col b{color:#fff;font-size:15px;margin-bottom:4px}
.ybiz-foot-col a{color:#c9cbe2;font-size:14px}
.ybiz-foot-col a:hover{color:#ffd98a;text-decoration:none}
.ybiz-foot-note{max-width:1080px;margin:18px auto 6px;font-size:13px;color:#8f92b8;text-align:center}
.ybiz-foot-copy{max-width:1080px;margin:0 auto;font-size:13px;color:#777aa3;text-align:center}

/* 404 */
.ybiz-404 h1{color:var(--ybiz-deep);font-size:26px}
.ybiz-btn{display:inline-block;background:var(--ybiz-main);color:#fff;padding:8px 20px;border-radius:8px;margin:10px 8px 0 0;font-size:15px}
.ybiz-btn:hover{background:var(--ybiz-deep);text-decoration:none;color:#fff}

@media (max-width:720px){
  .ybiz-foot-cols{grid-template-columns:1fr 1fr;gap:14px}
  .ybiz-hero h1{font-size:22px}
  .ybiz-nav{gap:4px 12px}
  .ybiz-nav a{font-size:14px}
}