/* ==========================================================================
   p-low-diangong.css · 低压电工页专属样式
   布局：左文右图 Hero + 悬浮数据芯片 + 三列作业范围卡 + 条件表格
         + 理论/实操双栏卡 + 编号材料清单 + FAQ 手风琴 + 相关工种卡 + 通栏 CTA
   ========================================================================== */

.ld-hero{padding:34px 0 70px;background:
  radial-gradient(700px 340px at 88% 12%,rgba(224,38,29,.14),transparent 60%),
  linear-gradient(180deg,#0E0E13 0%,#0B0B0E 100%)}
.ld-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;margin-top:26px}
.ld-hero-tag{display:inline-block;padding:6px 16px;border:1px solid rgba(255,184,0,.45);border-radius:999px;color:var(--gold);font-size:13px;letter-spacing:1px}
.ld-hero-title{font-size:52px;line-height:1.18;font-weight:900;color:#fff;margin:18px 0 18px}
.ld-hero-sub{font-size:16.5px;color:var(--muted);max-width:560px}
.ld-hero-btns{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.ld-hero-media{position:relative}
.ld-hero-media img{border-radius:var(--radius);border:1px solid var(--line-2);box-shadow:var(--shadow);width:100%;height:auto}
.ld-chip{position:absolute;background:#14141A;border:1px solid var(--line-2);border-radius:12px;padding:12px 18px;box-shadow:var(--shadow);transition:transform .3s,border-color .3s}
.ld-chip:hover{transform:translateY(-6px);border-color:var(--gold)}
.ld-chip strong{display:block;font-size:26px;color:var(--gold);line-height:1.1}
.ld-chip span{font-size:12.5px;color:var(--muted)}
.ld-chip-1{left:-26px;bottom:26px}
.ld-chip-2{right:-18px;top:-22px;border-top:2px solid var(--red)}

/* 通用小节头 */
.ld-sec-head{margin-bottom:40px}
.ld-sec-kicker{color:var(--red);font-weight:700;letter-spacing:3px;font-size:13px}
.ld-sec-title{font-size:32px;color:#fff;font-weight:800;margin:8px 0 10px}
.ld-sec-desc{color:var(--muted-2);font-size:14.5px}

/* 作业范围三列卡 */
.ld-scope{background:var(--bg)}
.ld-scope-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ld-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .3s,box-shadow .3s,border-color .3s;position:relative;overflow:hidden}
.ld-card::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(var(--red),var(--gold));opacity:0;transition:opacity .3s}
.ld-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:var(--line-2)}
.ld-card:hover::before{opacity:1}
.ld-card svg{width:34px;height:34px;color:var(--gold);margin-bottom:16px}
.ld-card h3{color:#fff;font-size:18px;margin-bottom:10px}
.ld-card p{color:var(--muted);font-size:14.5px}

/* 条件表格 */
.ld-table-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.ld-table{width:100%;border-collapse:collapse}
.ld-table th,.ld-table td{padding:18px 24px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.ld-table thead th{background:#14141B;color:var(--gold);font-size:14.5px;letter-spacing:1px}
.ld-table tbody tr:last-child td{border-bottom:0}
.ld-table tbody tr{transition:background .25s}
.ld-table tbody tr:hover{background:rgba(224,38,29,.06)}
.ld-table td:first-child{color:#fff;font-weight:700;white-space:nowrap}
.ld-table td{color:var(--muted)}
.ld-table a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* 考试双栏卡 */
.ld-exam{background:
  radial-gradient(560px 300px at 10% 90%,rgba(255,184,0,.06),transparent 60%),var(--bg)}
.ld-exam-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.ld-exam-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;transition:transform .3s,box-shadow .3s,border-color .3s}
.ld-exam-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--line-2)}
.ld-exam-card--red{background:linear-gradient(160deg,rgba(224,38,29,.16),rgba(224,38,29,.03) 55%),var(--card);border-top:2px solid var(--red)}
.ld-exam-no{display:inline-block;font-size:12px;color:#0B0B0E;background:var(--gold);border-radius:6px;padding:3px 10px;font-weight:700;letter-spacing:1px}
.ld-exam-head h3{color:#fff;font-size:22px;margin-top:14px}
.ld-exam-card ul{margin-top:18px;display:grid;gap:12px}
.ld-exam-card li{color:var(--muted);font-size:14.5px;padding-left:18px;position:relative}
.ld-exam-card li::before{content:"";position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:2px;background:var(--red)}
.ld-exam-card a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* 材料编号清单 */
.ld-mat-list{display:grid;grid-template-columns:1fr 1fr;gap:20px;counter-reset:mat}
.ld-mat-list li{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:transform .3s,border-color .3s}
.ld-mat-list li:hover{transform:translateY(-5px);border-color:var(--gold)}
.ld-mat-no{font-size:26px;font-weight:900;color:transparent;-webkit-text-stroke:1.2px var(--red);line-height:1.1;flex-shrink:0}
.ld-mat-list h3{color:#fff;font-size:16.5px;margin-bottom:6px}
.ld-mat-list p{color:var(--muted);font-size:14px}
.ld-mat-list a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* FAQ */
.wrap-narrow{max-width:860px}
.ld-faq-list{display:grid;gap:14px}
.ld-faq-list details{background:var(--card);border:1px solid var(--line);border-radius:12px;transition:border-color .3s}
.ld-faq-list details[open]{border-color:rgba(224,38,29,.6)}
.ld-faq-list summary{cursor:pointer;padding:18px 22px;color:#fff;font-weight:700;font-size:16px;list-style:none;position:relative;padding-right:44px}
.ld-faq-list summary::-webkit-details-marker{display:none}
.ld-faq-list summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:24px;color:var(--gold);transition:transform .3s}
.ld-faq-list details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
.ld-faq-list details p{padding:0 22px 20px;color:var(--muted);font-size:14.5px}
.ld-faq-list a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* 相关工种 */
.ld-rel{background:var(--bg)}
.ld-rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.ld-rel-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative;overflow:hidden;transition:transform .3s,box-shadow .3s,border-color .3s}
.ld-rel-card::after{content:"→";position:absolute;right:22px;top:24px;color:var(--red);font-size:22px;transition:transform .3s}
.ld-rel-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--gold)}
.ld-rel-card:hover::after{transform:translateX(6px)}
.ld-rel-card h3{color:#fff;font-size:18px;margin-bottom:8px}
.ld-rel-card p{color:var(--muted);font-size:14px}

/* CTA 通栏 */
.ld-cta{padding:30px 0 90px}
.ld-cta-inner{display:flex;justify-content:space-between;align-items:center;gap:30px;background:linear-gradient(120deg,#A90F0A,#E0261D 60%,#A90F0A);border-radius:18px;padding:44px 48px;box-shadow:var(--shadow-red);position:relative;overflow:hidden}
.ld-cta-inner::before{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;background:radial-gradient(circle,rgba(255,184,0,.35),transparent 70%)}
.ld-cta-text h2{color:#fff;font-size:26px;font-weight:900;margin-bottom:10px}
.ld-cta-text p{color:rgba(255,255,255,.85);font-size:15px;max-width:520px}
.ld-cta-act{display:flex;gap:14px;flex-shrink:0;position:relative;z-index:1}
.ld-cta-act .btn-ghost{border-color:rgba(255,255,255,.5);color:#fff}
.ld-cta-act .btn-ghost:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.12)}

/* 表格列宽（显式声明，table-layout 固定） */
.ld-table{table-layout:fixed}
.ld-table th:nth-child(1){width:22%}

/* 响应式 */
@media (max-width:1024px){
  .ld-hero-grid{grid-template-columns:1fr;gap:34px}
  .ld-hero-title{font-size:40px}
  .ld-scope-grid{grid-template-columns:1fr 1fr}
  .ld-exam-grid{grid-template-columns:1fr}
  .ld-mat-list{grid-template-columns:1fr}
  .ld-rel-grid{grid-template-columns:1fr 1fr}
  .ld-cta-inner{flex-direction:column;align-items:flex-start;padding:34px}
  .ld-chip-1{left:10px}
  .ld-chip-2{right:10px;top:-18px}
}
@media (max-width:720px){
  .ld-hero-title{font-size:32px}
  .ld-sec-title{font-size:25px}
  .ld-scope-grid,.ld-rel-grid{grid-template-columns:1fr}
  .ld-table th,.ld-table td{padding:13px 14px;font-size:13.5px}
  .ld-cta-inner{padding:26px 20px}
  .ld-cta-act{width:100%;flex-direction:column}
  .ld-cta-act a{width:100%}
}
/* ================= 重构扩充组件（本片 15 页共用） ================= */
.rx-sec-head{margin-bottom:30px}
.rx-kicker{color:var(--red);font-weight:700;letter-spacing:3px;font-size:13px}
.rx-title{font-size:30px;color:#fff;font-weight:800;margin:8px 0 10px}
.rx-desc{color:var(--muted,#9aa0a8);font-size:14.5px;max-width:780px}

/* D 步骤条 */
.rx-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:rxstep}
.rx-step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px 18px;transition:transform .3s,border-color .3s}
.rx-step:hover{transform:translateY(-5px);border-color:var(--gold)}
.rx-step::before{counter-increment:rxstep;content:"0"counter(rxstep);display:block;font-size:24px;font-weight:900;color:var(--red);margin-bottom:10px}
.rx-step h4{color:#fff;font-size:15.5px;margin-bottom:6px}
.rx-step p{color:var(--muted);font-size:13.5px}

/* E CSS 选项卡 */
.rx-tabs{display:flex;flex-direction:column}
.rx-tab-input{display:none}
.rx-tab-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.rx-tab-nav label{padding:10px 20px;border:1px solid var(--line-2);border-radius:999px;color:var(--muted);cursor:pointer;font-size:14px;transition:all .25s}
.rx-tab-panel{display:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px}
.rx-tab-panel h3{color:#fff;font-size:18px;margin-bottom:10px}
.rx-tab-panel p{color:var(--muted);font-size:14.5px;margin-bottom:8px}
.rx-tab-panel a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}
.rx-tabs .rx-tab-input:nth-of-type(1):checked ~ .rx-tab-nav label:nth-child(1),
.rx-tabs .rx-tab-input:nth-of-type(2):checked ~ .rx-tab-nav label:nth-child(2),
.rx-tabs .rx-tab-input:nth-of-type(3):checked ~ .rx-tab-nav label:nth-child(3){background:rgba(224,38,29,.16);border-color:var(--red);color:#fff}
.rx-tabs .rx-tab-input:nth-of-type(1):checked ~ .rx-tab-panel:nth-of-type(1),
.rx-tabs .rx-tab-input:nth-of-type(2):checked ~ .rx-tab-panel:nth-of-type(2),
.rx-tabs .rx-tab-input:nth-of-type(3):checked ~ .rx-tab-panel:nth-of-type(3){display:block}

/* G 数字仪表盘 */
.rx-gauge{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rx-gauge-item{background:linear-gradient(150deg,#1B1B24,#14141B);border:1px solid var(--line);border-radius:14px;padding:26px 22px;text-align:center;transition:transform .3s,border-color .3s}
.rx-gauge-item:hover{transform:translateY(-5px);border-color:var(--gold)}
.rx-gauge-item b{display:block;font-size:32px;font-weight:900;color:var(--gold);margin-bottom:8px}
.rx-gauge-item span{color:var(--muted);font-size:13.5px}

/* 警示框（陷阱提醒） */
.rx-warn{background:linear-gradient(120deg,rgba(224,38,29,.12),rgba(255,184,0,.05));border:1px solid rgba(224,38,29,.45);border-left:4px solid var(--red);border-radius:12px;padding:22px 26px}
.rx-warn h4{color:#fff;font-size:16px;margin-bottom:10px}
.rx-warn ul{display:grid;gap:8px}
.rx-warn li{color:var(--muted);font-size:14px;padding-left:18px;position:relative;list-style:none}
.rx-warn li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;background:var(--gold);border-radius:50%}

/* J 引用块 */
.rx-quote{border-left:3px solid var(--gold);padding:6px 0 6px 22px;color:var(--muted);font-size:15px;margin:20px 0;font-style:italic}

/* K 表格 */
.rx-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden}
.rx-table th{background:#14141B;color:#fff;text-align:left;padding:13px 16px;border-bottom:1px solid var(--line-2);font-size:14px}
.rx-table td{padding:13px 16px;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px;vertical-align:top}
.rx-table a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

/* 加深 FAQ */
.rx-faq{display:grid;gap:12px}
.rx-faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;transition:border-color .3s}
.rx-faq details[open]{border-color:rgba(255,184,0,.5)}
.rx-faq summary{cursor:pointer;padding:16px 20px;color:#fff;font-weight:700;font-size:15px;list-style:none;position:relative;padding-right:40px}
.rx-faq summary::-webkit-details-marker{display:none}
.rx-faq summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--red)}
.rx-faq details[open] summary::after{content:"–"}
.rx-faq details p{padding:0 20px 16px;color:var(--muted);font-size:14px}

/* F 团报阶梯 */
.rx-ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.rx-ladder div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;text-align:center;transition:border-color .3s}
.rx-ladder div:hover{border-color:var(--gold)}
.rx-ladder b{display:block;color:var(--gold);font-size:18px;margin-bottom:8px}
.rx-ladder p{color:var(--muted);font-size:13.5px}

/* 本地考点附注 */
.rx-note{background:#14141B;border:1px dashed var(--line-2);border-radius:12px;padding:20px 24px;color:var(--muted);font-size:14px}
.rx-note b{color:#fff}

@media (max-width:1024px){
  .rx-steps{grid-template-columns:1fr 1fr}
  .rx-gauge{grid-template-columns:1fr}
  .rx-ladder{grid-template-columns:1fr}
}
@media (max-width:720px){
  .rx-steps{grid-template-columns:1fr}
  .rx-title{font-size:24px}
}