/* ==========================================================================
   二级内容页通用版式（实验简介 / 实验原理 / 实验步骤 / 结果与结论 /
   教学特色 / 面向对象 / 教学支撑）
   配色与 site/css/style.css 保持一致，需与 style.css 同时引入。
   ========================================================================== */

/* ---------- 面包屑 ---------- */
.crumbs{background:#fff;border-bottom:1px solid var(--line);}
.crumbs-inner{padding:10px 0;font-size:13px;color:#888;}
.crumbs a{color:#888;}
.crumbs a:hover{color:var(--school-red);}
.crumbs em{font-style:normal;margin:0 8px;color:#bbb;}
.crumbs span{color:var(--school-red);}

/* ---------- 页面标题条 ---------- */
.page-head{
  background:
    radial-gradient(ellipse at 88% 15%, rgba(60,120,255,.20), transparent 55%),
    radial-gradient(ellipse at 10% 95%, rgba(40,80,200,.22), transparent 50%),
    linear-gradient(115deg,var(--hero-blue-1) 0%,#0E2A66 55%,var(--hero-blue-2) 100%);
  position:relative;overflow:hidden;
}
.page-head::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:linear-gradient(115deg,rgba(0,0,0,.9),rgba(0,0,0,.2));
  -webkit-mask-image:linear-gradient(115deg,rgba(0,0,0,.9),rgba(0,0,0,.2));
}
.page-head-inner{position:relative;z-index:1;padding:30px 0 34px;color:#fff;}
.page-head h1{font-size:27px;letter-spacing:2px;font-weight:normal;text-shadow:0 2px 8px rgba(0,0,0,.35);}
.page-head .ph-en{font-size:12px;letter-spacing:3px;color:#9fb6e6;margin-top:6px;text-transform:uppercase;}
.page-head .ph-desc{font-size:14px;color:#e2eafb;margin-top:12px;max-width:900px;text-align:justify;line-height:1.9;}
.page-head .ph-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.page-head .ph-chips span{font-size:12.5px;color:#dfe8ff;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:3px 12px;border-radius:14px;}

/* ---------- 主体两栏 ---------- */
.page{padding:24px 0 40px;}
.page-cols{display:flex;gap:20px;align-items:flex-start;}
.page-main{flex:1;min-width:0;background:#fff;border-radius:6px;box-shadow:0 2px 12px rgba(0,0,0,.05);padding:26px 30px 34px;}
.page-side{width:288px;flex-shrink:0;display:flex;flex-direction:column;gap:16px;}

/* ---------- 正文排版 ---------- */
.doc h2{
  font-size:19px;color:var(--school-red-dark);font-weight:normal;
  margin:30px 0 12px;padding-left:11px;border-left:4px solid var(--school-red);
}
.doc h2:first-child{margin-top:0;}
.doc h3{font-size:15.5px;color:#3a3a3a;margin:20px 0 8px;}
.doc h3 .idx{color:var(--school-red);margin-right:6px;}
.doc p{font-size:14.5px;color:#444;line-height:1.95;text-align:justify;margin-bottom:10px;}
.doc p.lead{color:#555;}
.doc b{color:var(--school-red-dark);}
.doc ul.dot,.doc ol.num{margin:6px 0 12px 22px;color:#444;font-size:14.5px;line-height:1.9;}
.doc ul.dot li,.doc ol.num li{margin-bottom:7px;text-align:justify;}
.doc ul.dot{list-style:none;margin-left:0;}
.doc ul.dot li{padding-left:16px;position:relative;}
.doc ul.dot li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;background:var(--school-red);border-radius:50%;}
.doc .quote{
  background:#faf7f6;border-left:3px solid var(--school-red);
  padding:12px 16px;margin:12px 0 16px;font-size:14px;color:#555;line-height:1.9;text-align:justify;
}
.doc .tip{font-size:13px;color:#8a8a8a;margin-top:10px;}
.doc .src{font-size:12.5px;color:#a08b8a;margin-top:6px;}

/* ---------- 表格 ---------- */
.doc .table-scroll{overflow-x:auto;margin:10px 0 14px;}
.doc table{width:100%;border-collapse:collapse;font-size:13.5px;}
.doc table th{background:var(--school-red);color:#fff;padding:9px 8px;font-weight:normal;white-space:nowrap;}
.doc table td{border:1px solid #eee;padding:8px 10px;color:#444;text-align:justify;vertical-align:top;}
.doc table tr:nth-child(even) td{background:#faf7f6;}
.doc table td.c,.doc table th.c{text-align:center;}
.doc table caption{caption-side:top;text-align:left;font-size:13px;color:#888;padding-bottom:8px;}

/* ---------- 卡片网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:12px 0 16px;}
.card-grid.g3{grid-template-columns:repeat(3,1fr);}
.card-grid.g1{grid-template-columns:1fr;}
.mini-card{background:#faf7f6;border:1px solid #f0e4e3;border-radius:6px;padding:18px 20px;}
.mini-card h4{font-size:15px;color:var(--school-red-dark);margin-bottom:8px;font-weight:normal;}
.mini-card p{font-size:13.5px;color:#555;line-height:1.85;text-align:justify;margin:0;}
.mini-card .mc-num{font-size:26px;color:rgba(159,41,37,.22);font-family:Georgia,serif;line-height:1;margin-bottom:4px;}

/* ---------- 时序 / 流程条 ---------- */
.flow{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 16px;}
.flow span{font-size:13px;color:var(--school-red-dark);background:#faf7f6;border:1px solid #f0e4e3;border-radius:14px;padding:4px 13px;}
.flow i{font-style:normal;color:#c2b1b0;align-self:center;}

/* ---------- 定义列表（参数表） ---------- */
.kv{margin:8px 0 16px;border-top:1px solid var(--line);}
.kv div{display:flex;border-bottom:1px solid var(--line);font-size:14px;}
.kv dt{flex:0 0 148px;padding:9px 12px;background:#faf7f6;color:var(--school-red-dark);border-right:1px solid var(--line);}
.kv dd{flex:1;padding:9px 14px;color:#444;}

/* 侧栏内的参数表压缩为窄栏两列 */
.page-side .kv{margin:10px 0 0;}
.page-side .kv div{font-size:12.5px;}
.page-side .kv dt{flex:0 0 70px;padding:7px 8px;font-size:12.5px;line-height:1.6;}
.page-side .kv dd{padding:7px 9px;line-height:1.7;}

/* ---------- 侧栏卡 ---------- */
.page-side .side-card{background:#fff;border-radius:6px;box-shadow:0 2px 12px rgba(0,0,0,.05);padding:18px 20px;}
.page-side .side-card h4{font-size:15.5px;color:var(--school-red-dark);padding-bottom:8px;border-bottom:1px solid var(--line);margin-bottom:10px;}
.page-side .side-card p{font-size:13.5px;color:#555;margin-bottom:6px;text-align:justify;}
.page-side .side-card a{color:var(--school-red);}
.page-side .side-card a:hover{text-decoration:underline;}
.side-nav{list-style:none;}
.side-nav li{margin-bottom:2px;}
.side-nav a{display:block;padding:7px 10px;border-radius:4px;font-size:14px;color:#555;}
.side-nav a:hover{background:#faf7f6;color:var(--school-red);}
.side-nav a.cur{background:var(--school-red);color:#fff;}
.side-cta{
  display:block;text-align:center;background:var(--school-red);color:#fff;
  padding:11px 0;border-radius:4px;font-size:15px;letter-spacing:2px;transition:background .2s;
}
.side-cta:hover{background:var(--school-red-dark);}
.side-meta{font-size:12.5px;color:#999;margin-top:8px;text-align:center;}

/* ---------- 上下页导航 ---------- */
.page-nav{display:flex;justify-content:space-between;gap:14px;margin-top:26px;padding-top:18px;border-top:1px dashed var(--line);font-size:14px;}
.page-nav a{color:var(--school-red);}
.page-nav a:hover{text-decoration:underline;}
.page-nav .pn-dis{color:#bdbdbd;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .page-cols{flex-direction:column;}
  .page-side{width:100%;}
  .card-grid,.card-grid.g3{grid-template-columns:1fr;}
}
@media (max-width:640px){
  .page-main{padding:20px 16px 26px;}
  .page-head h1{font-size:22px;}
  .kv div{flex-direction:column;}
  .kv dt{border-right:none;border-bottom:1px solid var(--line);flex:none;}
}