/* ============================================================
   龙铭特种作业 · 师资团队 shizi.css
   签名 S03：160° 渐变分割，左上深右下浅，内容居中，
            装饰=同心圆环（2-3 个 outline 圆）
   ============================================================ */

/* ---------- 首屏 Hero S03 ---------- */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;overflow:hidden;
  background:linear-gradient(160deg,#0b0b0c 0%,#131315 40%,#2a2a2e 100%)}
.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.3;
  -webkit-mask-image:linear-gradient(160deg,#000 30%,transparent 80%);
  mask-image:linear-gradient(160deg,#000 30%,transparent 80%)}
.hero-shade{position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(11,11,12,.85) 0%,rgba(11,11,12,.5) 50%,rgba(11,11,12,.7) 100%)}
/* 同心圆环装饰（右侧） */
.hero-rings{position:absolute;right:6%;top:50%;transform:translateY(-50%);width:340px;height:340px;pointer-events:none}
.ring{position:absolute;border-radius:50%;border:1px solid rgba(255,255,255,.2)}
.r1{inset:0}
.r2{inset:52px;border-color:rgba(255,255,255,.3)}
.r3{inset:104px;border-color:rgba(255,255,255,.45)}
.r3::after{content:"";position:absolute;inset:0;margin:auto;width:10px;height:10px;border-radius:50%;background:#fff}
.hero-inner{position:relative;z-index:2;width:min(1200px,92%);margin-inline:auto;
  padding:150px 0 90px;display:flex;flex-direction:column;align-items:center;text-align:center}
.hero-inner .crumbs{justify-content:center;margin-bottom:20px}
.hero-flag{margin-bottom:22px}
.hero-title{font-size:clamp(34px,5.4vw,62px);line-height:1.18;font-weight:900;margin-bottom:20px}
.hero-title .hl{color:#fff;position:relative;white-space:nowrap}
.hero-title .hl::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:14px;z-index:-1;
  background:linear-gradient(160deg,rgba(255,255,255,.22),transparent);transform:skewX(-10deg)}
.hero-lead{max-width:600px;font-size:16.5px;color:var(--muted-dark);margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;justify-content:center}

/* ---------- 师资阵容 ---------- */
.team-sec{background:var(--ink)}
.sec-head-center{flex-direction:column;align-items:center;text-align:center}
.sec-head-center .sec-sub{margin-inline:auto}
.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.team-card{padding:34px 26px;border-radius:12px;background:var(--ink-2);
  border:1px solid var(--line);transition:.4s var(--ease);text-align:center}
.team-card:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.32)}
.tc-head{display:flex;justify-content:center;margin-bottom:18px}
.tc-icon{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(255,255,255,.25);color:#fff}
.tc-icon svg{width:26px;height:26px}
.team-card h3{font-size:19px;font-weight:800;margin-bottom:6px}
.tc-role{font-size:12.5px;letter-spacing:.12em;color:var(--muted-dark);margin-bottom:14px}
.team-card p:last-child{font-size:14px;color:var(--muted-dark);line-height:1.85;text-align:left}

/* ---------- 教学现场 ---------- */
.teach-sec{background:var(--ink-2)}
.teach-cols{display:grid;grid-template-columns:1fr 1.1fr;gap:48px;align-items:center}
.teach-img{position:relative}
.teach-img img{width:100%;height:380px;object-fit:cover;border-radius:12px}
.teach-img figcaption{margin-top:14px;font-size:13px;color:var(--muted-dark)}
.teach-list{display:flex;flex-direction:column;gap:14px}
.teach-item{display:flex;gap:20px;padding:24px;border-radius:12px;background:var(--ink);
  border:1px solid var(--line);transition:.35s var(--ease)}
.teach-item:hover{border-color:rgba(255,255,255,.3)}
.ti-no{flex:none;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:#fff;color:#000;font-weight:900}
.teach-item h3{font-size:17px;font-weight:800;margin-bottom:6px}
.teach-item p{font-size:14px;color:var(--muted-dark);line-height:1.85}

/* ---------- 数字带 ---------- */
.stat-sec{background:var(--ink)}
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);
  border-radius:14px;overflow:hidden}
.sb-item{padding:36px 20px;text-align:center;border-right:1px solid var(--line);background:var(--ink-2)}
.sb-item:last-child{border-right:0}
.sb-num{display:block;font-size:clamp(30px,3.4vw,46px);font-weight:900;line-height:1.1}
.sb-txt{font-size:13px;color:var(--muted-dark);letter-spacing:.08em}
.stat-note{margin-top:28px;text-align:center;font-size:15px;color:var(--muted-dark)}
.stat-note a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}

/* ---------- 底部 CTA ---------- */
.cta-sec{background:var(--ink-2)}
.cta-strip{background:var(--ink);color:#fff;border-radius:18px;padding:50px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
  position:relative;overflow:hidden}
.cta-strip::before{content:"";position:absolute;right:-60px;bottom:-60px;width:240px;height:240px;
  border:1px solid rgba(255,255,255,.12);border-radius:50%}
.cta-strip h2{font-size:clamp(22px,2.8vw,32px);font-weight:900;margin-bottom:8px}
.cta-strip p{color:var(--muted-dark);font-size:14.5px}
.cta-btns{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1}

/* ---------- 课时安排 ---------- */
.sched-cols{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.sched-item{padding:28px;border-radius:12px;background:var(--ink);border:1px solid var(--line);transition:.35s}
.sched-item:hover{border-color:rgba(255,255,255,.3)}
.sched-item h3{font-size:18px;font-weight:800;margin-bottom:10px}
.sched-item p{font-size:14.5px;color:var(--muted-dark);line-height:1.9}
.sched-note{margin-top:24px;font-size:14.5px;color:var(--muted-dark);line-height:1.9}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){.team-grid{grid-template-columns:1fr 1fr}}
@media (max-width:1024px){
  .teach-cols{grid-template-columns:1fr;gap:32px}
  .teach-img img{height:300px}
  .stat-band{grid-template-columns:1fr 1fr}
  .sb-item:nth-child(2){border-right:0}
  .sb-item:nth-child(1),.sb-item:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:768px){
  .hero-rings{opacity:.35;width:240px;height:240px;right:-40px}
  .hero-inner{align-items:flex-start;text-align:left}
  .hero-inner .crumbs{justify-content:flex-start}
  .hero-cta{justify-content:flex-start}
  .sec-head-center{align-items:flex-start;text-align:left}
  .team-grid{grid-template-columns:1fr}
  .stat-band{grid-template-columns:1fr 1fr}
  .cta-strip{padding:36px 26px}
}
@media (max-width:480px){
  .stat-band{grid-template-columns:1fr}
  .sb-item{border-right:0;border-bottom:1px solid var(--line)}
  .sb-item:last-child{border-bottom:0}
}

/* ============================================================
   R2 重构新增模块样式（仅本页使用）
   ============================================================ */

/* ---------- 带班老师的一天 ---------- */
.day-sec{background:var(--paper);color:var(--txt-on-light)}
.day-sec .t-en{color:var(--muted-light)}
.day-sec .sec-sub{color:var(--muted-light)}
.day-cols{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.day-img img{width:100%;height:440px;object-fit:cover;border-radius:14px}
.day-img figcaption{margin-top:14px;font-size:13px;color:var(--muted-light)}
.day-text p{font-size:15px;color:var(--muted-light);line-height:2;margin-bottom:16px}
.day-text p:last-child{margin-bottom:0}

/* ---------- 讲师擅长方向标签 ---------- */
.tc-tags{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin:4px 0 14px}
.tc-tags span{font-size:11.5px;letter-spacing:.06em;color:var(--muted-dark);
  border:1px solid var(--line);border-radius:999px;padding:4px 11px}

/* ---------- 一堂课怎么上：时间线 ---------- */
.timeline-sec{background:var(--ink-2)}
.tl-track{display:grid;grid-template-columns:repeat(4,1fr);gap:0;counter-reset:tl;position:relative}
.tl-track::before{content:"";position:absolute;top:26px;left:6%;right:6%;height:1px;background:var(--line)}
.tl-node{position:relative;padding:0 18px;text-align:center}
.tl-dot{position:relative;z-index:2;width:52px;height:52px;margin:0 auto 20px;border-radius:50%;
  background:#0b0b0c;color:#fff;border:1px solid rgba(255,255,255,.3);
  display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:900}
.tl-node h3{font-size:18px;font-weight:800;margin-bottom:8px}
.tl-node p{font-size:14px;color:var(--muted-dark);line-height:1.85}

/* ---------- FAQ ---------- */
.faq-sec{background:var(--ink)}
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px}
.faq-item{background:var(--ink-2);border:1px solid var(--line);border-radius:12px;padding:0 24px}
.faq-item summary{cursor:pointer;list-style:none;font-size:16.5px;font-weight:800;padding:20px 0;position:relative;color:#f2f2ee}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:22px;font-weight:400;color:var(--muted-dark)}
.faq-item[open] summary::after{content:"\2212"}
.faq-item p{font-size:14.5px;color:var(--muted-dark);line-height:1.9;padding:0 0 20px}
.faq-item p a{color:#fff;border-bottom:1px solid rgba(255,255,255,.4)}

/* ---------- 响应式（R2 新增） ---------- */
@media (max-width:1080px){
  .day-cols{grid-template-columns:1fr;gap:30px}
  .day-img img{height:300px}
  .tl-track{grid-template-columns:1fr 1fr;gap:36px 0}
  .tl-track::before{display:none}
}
@media (max-width:640px){
  .tl-track{grid-template-columns:1fr;gap:30px}
}