/* ============================================================
   视频教学板块（teach.html）
   - 「最后一球」番剧的 12 堂技巧课，小狼教练示范
   - 类名前缀 tch- / ep- / m-，不与站点全局样式冲突
   - 颜色全部走主题变量，明暗主题都成立
   ============================================================ */

/* ---------- 首屏 ---------- */
.tch-hero{
  position:relative;overflow:hidden;padding:46px 0 54px;
  background:
    radial-gradient(1100px 460px at 86% -12%, rgba(var(--brass-rgb),.17), transparent 62%),
    radial-gradient(760px 400px at 2% 12%, rgba(14,95,85,.15), transparent 60%);
}
.tch-hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(var(--brass-rgb),.5) 1px, transparent 1.2px);
  background-size:26px 26px;opacity:.04;
  -webkit-mask-image:linear-gradient(180deg,#000,transparent 80%);
  mask-image:linear-gradient(180deg,#000,transparent 80%);
}
.tch-hero > .container{position:relative;z-index:1}
.tch-hero h1{
  font-family:var(--serif);font-size:clamp(29px,4.4vw,46px);line-height:1.18;
  letter-spacing:1.2px;color:var(--ink);margin:8px 0 16px;font-weight:700;text-wrap:balance;
}
.tch-hero h1 em{
  font-style:normal;font-weight:800;
  background:linear-gradient(115deg,var(--brass) 20%,color-mix(in srgb,var(--brass) 55%,#fff8e1) 48%,var(--brass) 78%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.tch-hero .lead{font-size:15px;line-height:2;color:var(--ink2);max-width:640px;text-wrap:pretty}
.tch-hero .lead b{color:var(--ink);font-weight:600}
.tch-kicker{display:inline-flex;align-items:center;gap:10px;letter-spacing:3.2px}
.tch-kicker::before{content:'';width:26px;height:1px;background:linear-gradient(90deg,transparent,var(--brass))}

.tch-stats{
  display:flex;gap:26px;flex-wrap:wrap;margin-top:28px;padding-top:20px;position:relative;
}
.tch-stats::before{
  content:'';position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,rgba(var(--brass-rgb),.6),rgba(var(--brass-rgb),.12) 55%,transparent);
}
.tch-stats b{
  display:block;font-family:var(--serif);font-size:23px;font-weight:800;letter-spacing:.5px;
  background:linear-gradient(160deg,var(--ink) 30%,color-mix(in srgb,var(--brass) 72%,var(--ink)));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.tch-stats span{font-size:11px;color:var(--ink3);letter-spacing:1.6px}

/* ---------- 番剧背景条 ---------- */
.tch-world{
  margin-top:26px;padding:18px 22px;border-radius:16px;
  display:flex;gap:26px;align-items:center;flex-wrap:wrap;
  background:linear-gradient(100deg, rgba(var(--brass-rgb),.1), var(--card) 46%);
  border:1px solid rgba(var(--brass-rgb),.34);
}
.tch-world .w-tit{flex:0 0 auto;max-width:250px}
.tch-world .w-tit s{
  display:block;text-decoration:none;font-size:10px;letter-spacing:2.6px;
  color:var(--brass-deep);font-weight:700;
}
.tch-world .w-tit b{
  display:block;font-family:var(--serif);font-size:17px;color:var(--ink);
  margin-top:6px;letter-spacing:.6px;line-height:1.5;
}
.tch-world .w-chips{flex:1;min-width:260px;display:flex;gap:9px;flex-wrap:wrap}
.tch-world .w-chips span{
  font-size:11.5px;padding:7px 14px;border-radius:999px;color:var(--ink2);
  border:1px solid var(--line);background:var(--bg);
}
.tch-world .w-chips span i{font-style:normal;color:var(--brass-deep);font-weight:700;margin-right:7px}

/* ---------- 筛选与网格 ---------- */
.tch-list{padding:10px 0 60px}
.tch-toolbar{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  margin:24px 0 20px;padding:12px 14px;border-radius:16px;
  background:var(--card);border:1px solid var(--line);
}
.tch-toolbar .sp{flex:1}
.tch-fbtn{
  padding:7px 15px;border-radius:99px;cursor:pointer;font-family:inherit;
  font-size:12.5px;font-weight:600;color:var(--ink2);letter-spacing:.3px;
  background:var(--bg);border:1.5px solid var(--line);transition:all .16s;
}
.tch-fbtn:hover{border-color:var(--brass);color:var(--brass-deep)}
.tch-fbtn.on{
  color:#fff;border-color:transparent;
  background:linear-gradient(180deg,#127368,var(--pitch-solid) 60%,var(--pitch-deep));
  box-shadow:0 8px 18px -10px rgba(14,95,85,.8);
}
.tch-count{font-size:11.5px;color:var(--ink3);letter-spacing:.5px}

.ep-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media (max-width:1080px){ .ep-grid{grid-template-columns:repeat(3,1fr)} }
@media (max-width:640px){ .ep-grid{grid-template-columns:repeat(2,1fr);gap:12px} }

.tch-ep{
  position:relative;border:1px solid rgba(var(--brass-rgb),.3);border-radius:16px;overflow:hidden;
  background:var(--card);cursor:pointer;padding:0;font-family:inherit;text-align:left;
  transition:transform .28s cubic-bezier(.2,.8,.2,1), box-shadow .28s, border-color .28s;
}
.tch-ep:hover,.tch-ep:focus-visible{
  transform:translateY(-6px);border-color:rgba(var(--brass-rgb),.85);
  box-shadow:0 26px 46px -24px rgba(var(--brass-rgb),.55), 0 0 0 1px rgba(var(--brass-rgb),.4);
  outline:none;
}
.tch-ep .thumb{position:relative;aspect-ratio:9/16;overflow:hidden;background:#0b1220}
.tch-ep .thumb img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s}
.tch-ep:hover .thumb img{transform:scale(1.05)}
.tch-ep .thumb::after{
  content:'';position:absolute;inset:0;
  /* 顶部压暗：盖住源片自带、被上边裁掉一半的旧字幕残留 */
  background:linear-gradient(180deg,rgba(6,10,16,.97) 0%,rgba(6,10,16,.86) 4%,rgba(6,10,16,.3) 13%,transparent 26%,transparent 50%,rgba(6,10,16,.94) 100%);
}
.tch-ep .no{
  position:absolute;top:10px;left:10px;z-index:2;font:800 10.5px/1 ui-monospace,Consolas,monospace;
  letter-spacing:.1em;padding:5px 9px;border-radius:99px;color:#fff;
  background:rgba(6,12,20,.5);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(4px);
}
.tch-ep .play{
  position:absolute;top:44%;left:50%;z-index:2;width:46px;height:46px;margin:-23px 0 0 -23px;
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:rgba(var(--brass-rgb),.94);opacity:0;transform:scale(.8);transition:.28s;
}
.tch-ep:hover .play,.tch-ep:focus-visible .play{opacity:1;transform:scale(1)}
.tch-ep .play svg{width:15px;height:15px;fill:#1b1408;margin-left:2px}
.tch-ep .meta{position:absolute;left:0;right:0;bottom:0;z-index:2;padding:14px 13px 14px}
.tch-ep .cat{display:block;font-size:9.5px;letter-spacing:2px;color:var(--brass);font-weight:700;margin-bottom:6px}
.tch-ep .name{display:block;font-size:15.5px;font-weight:800;color:#fff;letter-spacing:.5px;line-height:1.3}
.tch-ep .foot{
  display:flex;align-items:center;justify-content:space-between;margin-top:8px;
  font-size:10.5px;color:rgba(255,255,255,.55);
}
.tch-ep .stars{color:#f0b429;letter-spacing:.12em}
.tch-ep .dur{font-family:ui-monospace,Consolas,monospace}
.tch-ep .sk-chip{
  position:absolute;top:10px;right:10px;z-index:2;font:800 9.5px/1 ui-monospace,Consolas,monospace;
  letter-spacing:.08em;padding:5px 8px;border-radius:99px;color:#0b1220;
  background:rgba(var(--brass-rgb),.92);
}

.tch-note{
  margin-top:26px;padding:18px 20px;border-radius:14px;font-size:12.5px;line-height:1.85;
  color:var(--ink2);border:1px solid rgba(var(--brass-rgb),.3);position:relative;
  background:linear-gradient(115deg, rgba(var(--brass-rgb),.1), rgba(var(--brass-rgb),.02) 62%, transparent);
  display:flex;gap:14px;align-items:flex-start;text-wrap:pretty;
}
.tch-note i{
  color:var(--brass-deep);font-style:normal;font-family:ui-monospace,Consolas,monospace;
  font-weight:800;letter-spacing:.1em;
}
.tch-note b{color:var(--ink);font-weight:600}

/* ---------- 联动条 ---------- */
.tch-link{
  padding:0 0 60px;
}
.tch-link .in{
  border-radius:18px;padding:22px 24px;
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  background:linear-gradient(100deg, rgba(var(--brass-rgb),.12), var(--card) 46%);
  border:1px solid rgba(var(--brass-rgb),.4);
  box-shadow:inset 0 1px 0 rgba(var(--brass-rgb),.22);
  position:relative;overflow:hidden;
}
.tch-link .in::after{
  content:'GO';position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-family:var(--serif);font-size:96px;font-weight:800;letter-spacing:3px;
  color:rgba(var(--brass-rgb),.07);pointer-events:none;user-select:none;
}
.tch-link .in .txt{flex:1;min-width:240px}
.tch-link .in .txt b{
  display:block;font-family:var(--serif);font-size:18px;color:var(--ink);letter-spacing:.6px;
}
.tch-link .in .txt p{font-size:12.5px;color:var(--ink2);margin-top:6px;line-height:1.8;text-wrap:pretty}
.tch-link .in .acts{display:flex;gap:9px;flex-wrap:wrap}

/* ---------- 播放弹窗 ---------- */
.tch-modal{
  position:fixed;inset:0;z-index:140;display:none;align-items:center;justify-content:center;padding:24px;
  background:rgba(5,10,18,.8);backdrop-filter:blur(10px);
}
.tch-modal.open{display:flex}
.tch-modal .back{position:absolute;inset:0}
.tch-modal .panel{
  position:relative;width:min(1020px,100%);max-height:calc(100vh - 48px);
  display:grid;grid-template-columns:auto minmax(300px,1fr);gap:0;
  background:var(--card);border:1px solid rgba(var(--brass-rgb),.4);border-radius:20px;overflow:hidden;
  box-shadow:0 40px 90px -30px rgba(0,0,0,.85);
}
.tch-modal .vwrap{position:relative;background:#05090f;display:flex;align-items:center;justify-content:center}
/* 视频顶部渐隐收边：藏掉源片残留的半截旧字幕/台标，同时做电影感压边 */
.tch-modal .vwrap::after{
  content:'';position:absolute;left:0;right:0;top:0;height:96px;pointer-events:none;
  background:linear-gradient(180deg,#05090f 0%,#05090f 32%,rgba(5,9,15,.92) 50%,rgba(5,9,15,0) 100%);
}
.tch-modal video{
  display:block;height:min(84vh,820px);width:auto;aspect-ratio:9/16;background:#000;
}
.tch-modal .info{padding:26px 26px 22px;overflow-y:auto;max-height:calc(100vh - 48px);display:flex;flex-direction:column;gap:11px}
.tch-modal .no{font-size:10.5px;letter-spacing:2.2px;color:var(--brass-deep);font-weight:800}
.tch-modal h3{font-family:var(--serif);font-size:26px;color:var(--ink);letter-spacing:1px;line-height:1.25}
.tch-modal .sub{display:flex;gap:12px;align-items:center;font-size:11.5px;color:var(--ink3)}
.tch-modal .sub .stars{color:#f0b429;letter-spacing:.12em}
.tch-modal .sk-link{
  align-self:flex-start;display:inline-flex;align-items:center;gap:7px;
  font-size:11.5px;font-weight:700;color:var(--brass-deep);
  padding:7px 13px;border-radius:99px;
  background:rgba(var(--brass-rgb),.13);border:1px solid rgba(var(--brass-rgb),.4);
  transition:background .16s;
}
.tch-modal .sk-link:hover{background:rgba(var(--brass-rgb),.24)}
.tch-modal ol.steps{list-style:none;margin:8px 0 0;counter-reset:s;padding:0}
.tch-modal ol.steps li{
  counter-increment:s;position:relative;padding:12px 0 12px 40px;
  border-bottom:1px solid var(--line);font-size:13px;color:var(--ink2);line-height:1.75;
}
.tch-modal ol.steps li::before{
  content:counter(s,decimal-leading-zero);position:absolute;left:0;top:13px;
  font:800 10.5px/1.7 ui-monospace,Consolas,monospace;color:var(--brass-deep);letter-spacing:.08em;
}
.tch-modal ol.steps li b{color:var(--ink);font-weight:600}
.tch-modal .key{
  padding:14px 16px;border-radius:12px;border-left:2px solid var(--brass);
  background:rgba(var(--brass-rgb),.1);font-size:12.5px;color:var(--ink2);line-height:1.85;
}
.tch-modal .key s{
  display:block;text-decoration:none;font-size:9.5px;font-weight:800;letter-spacing:2.2px;
  color:var(--brass-deep);margin-bottom:7px;
}
.tch-modal .nextup{
  margin-top:auto;display:flex;align-items:center;gap:12px;padding:10px 13px 10px 10px;
  border-radius:13px;border:1px solid var(--line);background:var(--bg);cursor:pointer;
  transition:border-color .18s, background .18s, transform .18s;outline:none;
}
.tch-modal .nextup:hover,.tch-modal .nextup:focus-visible{
  border-color:rgba(var(--brass-rgb),.8);background:rgba(var(--brass-rgb),.08);transform:translateY(-1px);
}
.tch-modal .nextup img{
  width:44px;height:78px;object-fit:cover;border-radius:8px;display:block;flex:none;
  border:1px solid rgba(var(--brass-rgb),.35);
}
.tch-modal .nextup .tx{flex:1;min-width:0}
.tch-modal .nextup .tx s{
  display:block;text-decoration:none;font:800 9px/1 ui-monospace,Consolas,monospace;
  letter-spacing:1.8px;color:var(--brass);margin-bottom:7px;
}
.tch-modal .nextup .tx b{display:block;font-size:14px;font-weight:700;color:var(--ink);letter-spacing:.4px;margin-bottom:4px}
.tch-modal .nextup .tx span{font-size:11px;color:var(--ink3)}
.tch-modal .nextup i{font-style:normal;flex:none;padding-right:2px;font-size:16px;color:var(--brass)}
.tch-modal .pnav{display:flex;gap:9px;margin-top:6px;padding-top:2px}
.tch-modal .pnav button{
  flex:1;padding:11px;border-radius:11px;cursor:pointer;font-family:inherit;font-size:12.5px;font-weight:600;
  color:var(--ink2);background:var(--bg);border:1px solid var(--line);transition:all .16s;
}
.tch-modal .pnav button:hover:not(:disabled){border-color:var(--brass);color:var(--brass-deep)}
.tch-modal .pnav button:disabled{opacity:.35;cursor:not-allowed}
.tch-modal .x{
  position:absolute;top:14px;right:14px;z-index:5;width:36px;height:36px;border-radius:50%;cursor:pointer;
  display:grid;place-items:center;font-size:15px;color:var(--ink);
  background:var(--bg);border:1px solid var(--line);transition:background .15s;
}
.tch-modal .x:hover{background:rgba(var(--brass-rgb),.2)}

@media (max-width:760px){
  .tch-modal{padding:12px}
  .tch-modal .panel{grid-template-columns:1fr;overflow-y:auto;max-height:calc(100vh - 24px)}
  .tch-modal video{height:auto;width:100%}
  .tch-modal .info{max-height:none}
}