.course-brief{
  --forest:#142319;
  --white:#ffffff;
  --canvas:#edf3f6;
  --paper:#fbf8f1;
  --ink:#18232d;
  --dim:#5f6b76;
  --coral:#df5130;
  --coral-deep:#c94f2f;
  --green:#2f7d57;
  --blue:#48688c;
  --tint:#df5130;           
  --line:#e7e0d0;
  --line-strong:#d9d1bd;
  --pad:56px;
  --mono:ui-monospace,"SF Mono",Menlo,monospace;
}
.course-brief{
  font-family:-apple-system,"PingFang SC",sans-serif;
  background:var(--canvas);
  color:var(--ink);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
.course-brief a{color:inherit;text-decoration:none}
.course-brief .mono{font-family:var(--mono)}
.course-brief .paper{
  max-width:1160px;margin:6px auto 40px;
  background:var(--paper);
  border:1px solid var(--line-strong);
  border-radius:18px;
  box-shadow:0 30px 70px rgba(24,35,45,.10),0 2px 6px rgba(24,35,45,.05);
  padding:0 var(--pad);
  overflow:hidden;
}
.course-brief .doc-head{
  display:flex;flex-wrap:wrap;
  border-bottom:1px solid var(--line-strong);
  margin:0 calc(-1 * var(--pad));padding:0 calc(var(--pad) - 20px);
}
.course-brief .doc-field{
  padding:16px 20px 14px;
  border-right:1px solid var(--line);
  min-width:0;
}
.course-brief .doc-field:last-child{border-right:none}
.course-brief .doc-field b{
  display:block;font-family:var(--mono);font-weight:400;
  font-size:12px;color:var(--dim);letter-spacing:.08em;margin-bottom:2px;
}
.course-brief .doc-field span{font-family:var(--mono);font-size:13.5px;font-weight:600;white-space:nowrap}
.course-brief .doc-field .tintdot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--tint);margin-right:6px;vertical-align:1px}
.course-brief .doc-field .open-tag{color:var(--green)}
.course-brief .doc-field.doc-type span{letter-spacing:.14em}
.course-brief .sec{padding:52px 0 56px;border-top:1px solid var(--line)}
.course-brief .sec:first-of-type{border-top:none}
.course-brief .sec-eyebrow{
  font-family:var(--mono);font-size:12px;color:var(--dim);
  letter-spacing:.14em;margin-bottom:10px;
}
.course-brief .sec-eyebrow em{font-style:normal;color:var(--coral-deep)}
.course-brief .sec h2{font-size:22px;line-height:1.4;letter-spacing:.01em}
.course-brief .sec-sub{font-size:13.5px;color:var(--dim);margin-top:6px}
.course-brief .hero{
  display:grid;grid-template-columns:1.04fr .96fr;gap:56px;
  padding:52px 0 56px;align-items:start;
}
.course-brief .hero-kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--dim);
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.course-brief .hero-kicker .tintdot{width:8px;height:8px;border-radius:50%;background:var(--tint)}
.course-brief .hero-kicker .sep{color:var(--line-strong)}
.course-brief .hero-kicker .open{color:var(--green)}
.course-brief .hero h1{
  font-size:clamp(28px,3.6vw,42px);
  line-height:1.28;letter-spacing:.01em;
  margin:16px 0 18px;font-weight:800;
}
.course-brief .hero-dek{font-size:16px;color:#3c4854;max-width:34em}
.course-brief .hero-meta{
  display:flex;flex-wrap:wrap;gap:0;margin:26px 0 4px;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.course-brief .hero-meta div{padding:12px 22px 12px 0;margin-right:22px;border-right:1px solid var(--line)}
.course-brief .hero-meta div:last-child{border-right:none;margin-right:0}
.course-brief .hero-meta b{display:block;font-family:var(--mono);font-weight:400;font-size:12px;color:var(--dim);letter-spacing:.08em}
.course-brief .hero-meta span{font-size:15px;font-weight:700;white-space:nowrap}
.course-brief .hero-cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:26px}
.course-brief .btn-main{
  display:inline-block;background:var(--coral);color:#fff;
  font-size:16px;font-weight:700;padding:14px 24px;border-radius:10px;
  box-shadow:0 6px 18px rgba(223,81,48,.30);
  transition:transform .12s,background .12s;
}
.course-brief .btn-main:hover{background:var(--coral-deep);transform:translateY(-1px)}
.course-brief .btn-ghost{
  display:inline-block;border:1.5px solid var(--line-strong);color:var(--ink);
  font-size:15px;font-weight:600;padding:12.5px 20px;border-radius:10px;
  transition:border-color .12s;
}
.course-brief .btn-ghost:hover{border-color:var(--ink)}
.course-brief .hero-free{
  margin-top:14px;font-family:var(--mono);font-size:12px;color:var(--green);letter-spacing:.04em;
}
.course-brief .hero-free i{font-style:normal;display:inline-block;width:14px;height:14px;border:1.5px solid var(--green);border-radius:4px;margin-right:7px;vertical-align:-2px;position:relative}
.course-brief .hero-free i::after{content:"";position:absolute;left:3px;top:.5px;width:4px;height:8px;border:solid var(--green);border-width:0 1.5px 1.5px 0;transform:rotate(40deg)}
.course-brief .artifact-side{min-width:0}
.course-brief .win{
  background:#fff;border:1px solid var(--line-strong);border-radius:12px;
  box-shadow:0 18px 44px rgba(24,35,45,.13),0 2px 6px rgba(24,35,45,.06);
  overflow:hidden;
}
.course-brief .win-bar{
  display:flex;align-items:center;gap:10px;
  padding:10px 14px;background:#f5efe2;border-bottom:1px solid var(--line);
}
.course-brief .win-dots{display:flex;gap:5px}
.course-brief .win-dots i{width:9px;height:9px;border-radius:50%;background:#dcd3bf}
.course-brief .win-title{font-family:var(--mono);font-size:12px;color:var(--dim);flex:1;text-align:center}
.course-brief .win-title b{color:var(--ink);font-weight:600}
.course-brief .win-badge{
  font-family:var(--mono);font-size:11px;color:var(--green);
  border:1px solid var(--green);border-radius:20px;padding:1px 8px;white-space:nowrap;
}
.course-brief .win-body{padding:20px 22px 18px}
.course-brief .doc-title-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.course-brief .doc-title{font-size:17px;font-weight:800;letter-spacing:.02em}
.course-brief .doc-title::after{content:"";display:block;width:52px;height:3px;background:var(--tint);border-radius:2px;margin-top:6px}
.course-brief .doc-src{font-family:var(--mono);font-size:11px;color:var(--dim);text-align:right;line-height:1.5}
.course-brief .doc-metarow{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.course-brief .doc-chip{
  display:flex;align-items:center;gap:6px;
  border:1px solid var(--line);border-radius:6px;padding:5px 9px;background:#fdfbf6;
  font-family:var(--mono);font-size:11px;color:var(--dim);
}
.course-brief .doc-chip s{display:inline-block;width:44px;height:6px;border-radius:3px;background:rgba(24,35,45,.14);text-decoration:none}
.course-brief .doc-sec-label{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  color:var(--coral-deep);margin:12px 0 8px;
}
.course-brief .doc-table{border:1px solid var(--line);border-radius:8px;overflow:hidden}
.course-brief .doc-tr{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line);background:#fff}
.course-brief .doc-tr:last-child{border-bottom:none}
.course-brief .doc-tr:nth-child(odd){background:#fdfbf5}
.course-brief .doc-tr i{width:13px;height:13px;border:1.5px solid #b9c0c7;border-radius:3.5px;flex:none;position:relative}
.course-brief .doc-tr.done i{border-color:var(--green);background:var(--green)}
.course-brief .doc-tr.done i::after{content:"";position:absolute;left:3px;top:.5px;width:3.5px;height:7px;border:solid #fff;border-width:0 1.5px 1.5px 0;transform:rotate(40deg)}
.course-brief .doc-tr s{height:7px;border-radius:3px;background:rgba(24,35,45,.13);text-decoration:none}
.course-brief .doc-tr .w1{width:38%}
.course-brief .doc-tr .w2{width:16%}
.course-brief .doc-tr .w3{width:12%;background:rgba(72,104,140,.28)}
.course-brief .win-note{
  display:flex;justify-content:space-between;gap:10px;align-items:center;
  margin-top:14px;padding-top:12px;border-top:1px dashed var(--line-strong);
  font-family:var(--mono);font-size:11px;color:var(--dim);
}
.course-brief .win-note b{color:var(--green);font-weight:600}
.course-brief .artifact-caption{
  margin:14px 2px 0;font-size:13.5px;color:var(--ink);line-height:1.6;
}
.course-brief .artifact-caption .mono{font-size:12px;color:var(--coral-deep);letter-spacing:.06em}
.course-brief .artifact-caption em{font-style:normal;color:var(--green);font-family:var(--mono);font-size:12px}
.course-brief .mini-row{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:20px;
}
.course-brief .mini{
  border:1px solid var(--line);border-radius:10px;background:#fdfbf6;
  padding:12px 10px 10px;text-align:center;
}
.course-brief .mini-ico{width:34px;height:40px;margin:0 auto 8px;position:relative}
.course-brief .ico-doc{background:#fff;border:1.5px solid var(--line-strong);border-radius:4px}
.course-brief .ico-doc::before{content:"";position:absolute;left:6px;top:8px;width:18px;height:3px;background:var(--tint);border-radius:2px}
.course-brief .ico-doc::after{content:"";position:absolute;left:6px;top:16px;width:20px;height:14px;
  background:repeating-linear-gradient(180deg,rgba(24,35,45,.18) 0 2.5px,transparent 2.5px 7px);border-radius:1px}
.course-brief .ico-log{background:#fff;border:1.5px solid var(--line-strong);border-radius:4px}
.course-brief .ico-log::before{content:"";position:absolute;left:6px;top:7px;width:8px;height:8px;border-radius:50%;border:2px solid var(--green)}
.course-brief .ico-log::after{content:"";position:absolute;left:6px;top:21px;width:21px;height:11px;
  background:repeating-linear-gradient(180deg,rgba(24,35,45,.18) 0 2.5px,transparent 2.5px 6.5px)}
.course-brief .ico-skill{background:var(--forest);border-radius:5px}
.course-brief .ico-skill::before{content:">_";position:absolute;left:7px;top:6px;font-family:var(--mono);font-size:10px;color:#8fd0a9;font-weight:700}
.course-brief .ico-skill::after{content:"";position:absolute;left:7px;bottom:8px;width:19px;height:8px;
  background:repeating-linear-gradient(180deg,rgba(251,248,241,.35) 0 2px,transparent 2px 5px)}
.course-brief .ico-folder{background:transparent}
.course-brief .ico-folder::before{content:"";position:absolute;left:0;top:8px;width:34px;height:26px;background:#f0e6cf;border:1.5px solid var(--line-strong);border-radius:3px}
.course-brief .ico-folder::after{content:"";position:absolute;left:0;top:3px;width:15px;height:8px;background:#f0e6cf;border:1.5px solid var(--line-strong);border-bottom:none;border-radius:3px 3px 0 0}
.course-brief .mini b{display:block;font-size:12px;font-weight:700;letter-spacing:.04em}
.course-brief .mini span{display:block;font-family:var(--mono);font-size:10.5px;color:var(--dim);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.course-brief .mini-row-cap{
  margin-top:10px;font-family:var(--mono);font-size:11.5px;color:var(--dim);text-align:center;letter-spacing:.05em;
}
.course-brief .fit{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;padding:34px 0 38px}
.course-brief .fit-col h3{font-size:15px;font-weight:800;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.course-brief .fit-col h3 .mono{font-size:11px;font-weight:400;color:var(--dim);letter-spacing:.12em}
.course-brief .fit-col p{font-size:15px;color:#3c4854}
.course-brief .req{list-style:none;margin-top:2px}
.course-brief .req li{
  display:flex;gap:11px;align-items:flex-start;
  padding:9px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:#3c4854;
}
.course-brief .req li:last-child{border-bottom:none}
.course-brief .req i{flex:none;width:16px;height:16px;border:1.5px solid var(--line-strong);border-radius:4px;margin-top:4px;background:#fff}
.course-brief .band{
  margin:0 calc(-1 * var(--pad));
  padding:56px var(--pad) 58px;
  background:var(--forest);
  color:var(--paper);
}
.course-brief .band .sec-eyebrow{color:rgba(251,248,241,.55)}
.course-brief .band .sec-eyebrow em{color:#ff9d7e}
.course-brief .band h2{color:var(--paper);font-size:24px;max-width:26em}
.course-brief .band h2 b{color:#ff9d7e}
.course-brief .band .sec-sub{color:rgba(251,248,241,.6)}
.course-brief .wb{
  margin:34px auto 0;max-width:920px;
  background:#0f1b13;
  border:1px solid rgba(251,248,241,.14);
  border-radius:14px;
  box-shadow:0 26px 60px rgba(0,0,0,.42);
  display:flex;flex-direction:column;
  overflow:hidden;
}
.course-brief .wb-top{
  display:flex;align-items:center;gap:16px;
  padding:11px 16px;border-bottom:1px solid rgba(251,248,241,.12);
  font-family:var(--mono);font-size:11px;color:rgba(251,248,241,.75);
}
.course-brief .wb-top .wb-exit{white-space:nowrap;color:rgba(251,248,241,.55)}
.course-brief .wb-top .wb-name{white-space:nowrap;font-weight:600;color:rgba(251,248,241,.9);overflow:hidden;text-overflow:ellipsis}
.course-brief .wb-prog{flex:1;height:4px;border-radius:2px;background:rgba(251,248,241,.16);min-width:60px}
.course-brief .wb-prog i{display:block;width:17%;height:100%;border-radius:2px;background:var(--coral)}
.course-brief .wb-top .wb-map{white-space:nowrap;color:rgba(251,248,241,.55)}
.course-brief .wb-mid{display:flex;min-height:0;flex:1}
.course-brief .wb-rail{
  width:54px;flex:none;display:flex;flex-direction:column;align-items:center;
  gap:13px;padding:20px 0;border-right:1px solid rgba(251,248,241,.08);
}
.course-brief .wb-dot{
  width:26px;height:26px;border-radius:50%;
  border:1.5px solid rgba(251,248,241,.28);
  color:rgba(251,248,241,.5);
  font-family:var(--mono);font-size:10px;
  display:grid;place-items:center;position:relative;
}
.course-brief .wb-dot.on{
  border-color:var(--coral);color:#fff;background:rgba(223,81,48,.3);
  box-shadow:0 0 0 4px rgba(223,81,48,.16);
}
.course-brief .wb-dot.done{border-color:rgba(143,208,169,.6);color:#8fd0a9}
.course-brief .wb-rail-label{
  writing-mode:vertical-rl;font-family:var(--mono);font-size:10px;
  letter-spacing:.3em;color:rgba(251,248,241,.35);margin-top:auto;
}
.course-brief .wb-paper{
  flex:1;margin:16px 14px;min-width:0;
  background:
    linear-gradient(rgba(24,35,45,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(24,35,45,.05) 1px,transparent 1px),
    var(--paper);
  background-size:22px 22px,22px 22px,auto;
  border-radius:9px;padding:20px 22px;
  color:var(--ink);
  box-shadow:inset 0 0 0 1px rgba(24,35,45,.06);
}
.course-brief .wb-brief-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--coral-deep);margin-bottom:8px}
.course-brief .wb-brief-title{font-size:15.5px;font-weight:800;line-height:1.45;margin-bottom:10px}
.course-brief .wb-bars s{display:block;height:7px;border-radius:3px;background:rgba(24,35,45,.13);margin-bottom:7px;text-decoration:none}
.course-brief .wb-bars .b1{width:92%}
.course-brief .wb-bars .b2{width:78%}
.course-brief .wb-bars .b3{width:60%}
.course-brief .wb-goal{
  margin-top:16px;background:#fff;border:1px solid var(--line);
  border-radius:8px;padding:12px 14px;box-shadow:0 4px 12px rgba(24,35,45,.07);
}
.course-brief .wb-goal b{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--green);display:block;margin-bottom:7px}
.course-brief .wb-goal .wb-file{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:12px;font-weight:600}
.course-brief .wb-goal .wb-file i{width:12px;height:15px;background:#fff;border:1.5px solid var(--line-strong);border-radius:2px;position:relative;flex:none}
.course-brief .wb-goal .wb-file i::after{content:"";position:absolute;left:2px;top:3px;width:6px;height:7px;
  background:repeating-linear-gradient(180deg,rgba(24,35,45,.28) 0 1.5px,transparent 1.5px 3.5px)}
.course-brief .wb-goal s{display:block;height:6px;border-radius:3px;background:rgba(24,35,45,.10);margin-top:7px;text-decoration:none}
.course-brief .wb-goal .g1{width:84%}
.course-brief .wb-goal .g2{width:58%}
.course-brief .wb-coach{
  width:27%;min-width:170px;flex:none;margin:16px 14px 16px 0;
  background:rgba(251,248,241,.055);
  border:1px solid rgba(251,248,241,.13);
  border-radius:9px;padding:15px 15px 13px;
  display:flex;flex-direction:column;
}
.course-brief .wb-coach-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:#8fd0a9;margin-bottom:9px}
.course-brief .wb-coach-txt{font-size:12px;line-height:1.65;color:rgba(251,248,241,.82);margin-bottom:12px}
.course-brief .wb-check-label{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:rgba(251,248,241,.5);margin-bottom:8px}
.course-brief .wb-check{list-style:none}
.course-brief .wb-check li{display:flex;gap:8px;align-items:flex-start;font-size:11.5px;color:rgba(251,248,241,.75);line-height:1.5;margin-bottom:8px}
.course-brief .wb-check i{flex:none;width:13px;height:13px;border:1.5px solid rgba(251,248,241,.35);border-radius:3.5px;margin-top:2px;position:relative}
.course-brief .wb-check li.ok i{border-color:#8fd0a9;background:rgba(143,208,169,.25)}
.course-brief .wb-check li.ok i::after{content:"";position:absolute;left:3px;top:0;width:3.5px;height:7px;border:solid #8fd0a9;border-width:0 1.5px 1.5px 0;transform:rotate(40deg)}
.course-brief .wb-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:10px 16px;border-top:1px solid rgba(251,248,241,.12);
  font-family:var(--mono);font-size:11px;color:rgba(251,248,241,.55);
}
.course-brief .wb-next{background:var(--coral);color:#fff;font-weight:700;padding:5px 13px;border-radius:6px}
.course-brief .wb-hint{color:rgba(251,248,241,.4)}
.course-brief .wb-notes{
  max-width:920px;margin:26px auto 0;
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px 34px;
}
.course-brief .wb-note b{
  display:flex;align-items:baseline;gap:9px;
  font-size:14px;color:var(--paper);font-weight:700;margin-bottom:5px;
}
.course-brief .wb-note b .mono{font-size:11px;color:#ff9d7e;font-weight:400}
.course-brief .wb-note p{font-size:12.5px;line-height:1.7;color:rgba(251,248,241,.6)}
.course-brief .plan-head-extra{
  display:flex;gap:18px;flex-wrap:wrap;margin-top:14px;
  font-family:var(--mono);font-size:12px;color:var(--dim);letter-spacing:.04em;
}
.course-brief .plan-head-extra b{color:var(--ink);font-weight:600}
.course-brief .plan-head-extra .free-note{color:var(--green)}
.course-brief .plan{position:relative;margin-top:38px;padding-left:58px}
.course-brief .plan::before{
  content:"";position:absolute;left:20px;top:14px;bottom:10px;
  width:2px;background:var(--line-strong);
}
.course-brief .chapter{position:relative;padding-bottom:44px}
.course-brief .chapter:last-child{padding-bottom:6px}
.course-brief .ch-node{
  position:absolute;left:-52px;top:-1px;
  width:32px;height:32px;border-radius:50%;
  background:var(--forest);color:var(--paper);
  font-family:var(--mono);font-size:13px;font-weight:700;
  display:grid;place-items:center;
  box-shadow:0 0 0 4px var(--paper);
}
.course-brief .chapter.prep .ch-node{background:var(--paper);color:var(--dim);border:1.5px dashed var(--line-strong)}
.course-brief .ch-head{margin-bottom:14px}
.course-brief .ch-kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--dim);margin-bottom:4px}
.course-brief .ch-kicker b{color:var(--coral-deep);font-weight:600}
.course-brief .chapter.prep .ch-kicker b{color:var(--dim)}
.course-brief .ch-head h3{font-size:18px;line-height:1.45;font-weight:800}
.course-brief .chapter.prep .ch-head h3{color:#4a5560;font-weight:700}
.course-brief .ch-dek{font-size:13.5px;color:var(--dim);margin-top:5px;max-width:44em}
.course-brief .lessons{border-top:1px solid var(--line)}
.course-brief .lesson{
  display:grid;grid-template-columns:52px 1fr 58px 62px 46px;
  gap:0 14px;align-items:start;
  padding:11px 6px 11px 2px;border-bottom:1px solid var(--line);
  transition:background .12s;
}
.course-brief .lesson:hover{background:rgba(223,81,48,.045)}
.course-brief .lesson-no{font-family:var(--mono);font-size:12.5px;color:var(--dim);font-weight:600;padding-top:3px}
.course-brief .chapter.prep .lesson-no{color:#96917f}
.course-brief .lesson-main{min-width:0}
.course-brief .lesson-title{display:block;font-size:15px;font-weight:600;line-height:1.5}
.course-brief .chapter.prep .lesson-title{font-weight:500;color:#3c4854}
.course-brief .lesson-outcome{display:block;font-size:12.5px;color:var(--dim);line-height:1.55;margin-top:2px}
.course-brief .lesson-outcome::before{content:"↳ ";font-family:var(--mono);color:#b3ab97}
.course-brief .lesson-type{font-family:var(--mono);font-size:11.5px;color:var(--dim);text-align:center;white-space:nowrap;padding-top:4px}
.course-brief .lesson-type.t-shizhan{color:var(--coral-deep)}
.course-brief .lesson-type.t-yanshou{color:var(--green)}
.course-brief .lesson-min{font-family:var(--mono);font-size:11.5px;color:var(--dim);text-align:right;white-space:nowrap;padding-top:4px}
.course-brief .lesson-free{
  font-family:var(--mono);font-size:10.5px;color:var(--green);
  border:1px solid var(--green);border-radius:20px;
  padding:1px 7px;text-align:center;justify-self:end;white-space:nowrap;
  margin-top:3px;
}
.course-brief .lesson-free.none{visibility:hidden}
/* 章尾产物条（A 原版：纸面白条 + 绿菱形接点 + 虚线连轨道） */
.course-brief .capstone{
  position:relative;margin:18px 0 0 26px;
  background:#fff;border:1px solid var(--line);
  border-left:3px solid var(--tint);
  border-radius:8px;padding:12px 18px 12px 16px;
  box-shadow:0 8px 20px rgba(24,35,45,.08);
  max-width:52em;
}
.course-brief .chapter.prep .capstone{border-left-color:var(--line-strong);box-shadow:0 4px 12px rgba(24,35,45,.05)}
.course-brief .capstone::before{ /* 流水线上的产出接点 */
  content:"";position:absolute;left:-88px;top:50%;margin-top:-5px;
  width:10px;height:10px;background:var(--green);
  transform:rotate(45deg);
  box-shadow:0 0 0 3px var(--paper);
}
.course-brief .chapter.prep .capstone::before{background:var(--line-strong)}
.course-brief .capstone::after{ /* 与轨道的虚线连接 */
  content:"";position:absolute;left:-80px;top:50%;width:80px;
  border-top:1px dashed var(--line-strong);
}
.course-brief .capstone b{
  font-family:var(--mono);font-size:11px;letter-spacing:.1em;
  color:var(--green);display:block;margin-bottom:3px;font-weight:600;
}
.course-brief .chapter.prep .capstone b{color:var(--dim)}
.course-brief .capstone p{font-size:13.5px;line-height:1.65;color:var(--ink)}
.course-brief .inventory{
  margin-top:30px;
  display:grid;grid-template-columns:1fr 1fr;gap:0 56px;
  border-top:1px solid var(--line-strong);
}
.course-brief .inv-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:15px 2px;border-bottom:1px solid var(--line);
}
.course-brief .inv-no{
  font-family:var(--mono);font-size:12.5px;font-weight:700;color:var(--coral-deep);
  padding-top:3px;flex:none;letter-spacing:.05em;
}
.course-brief .inv-item p{font-size:14.5px;line-height:1.65;color:#2c3844}
.course-brief .final{
  display:flex;align-items:center;gap:40px;flex-wrap:wrap;
  padding:50px 0 54px;
}
.course-brief .final-main{flex:1;min-width:260px}
.course-brief .final-main h2{font-size:24px;line-height:1.4}
.course-brief .final-main p{font-size:14px;color:var(--dim);margin-top:6px;max-width:36em}
.course-brief .final-cta{flex:none;display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.course-brief .final-cta .mono-note{font-family:var(--mono);font-size:11.5px;color:var(--dim);letter-spacing:.05em}
.course-brief .doc-foot{
  margin:0 calc(-1 * var(--pad));padding:16px var(--pad);
  border-top:1px solid var(--line-strong);
  font-family:var(--mono);font-size:11px;color:var(--dim);letter-spacing:.06em;
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
}
@media (max-width:1023px){
.course-brief .hero{grid-template-columns:1fr;gap:40px}
.course-brief .fit{grid-template-columns:1fr;gap:30px}
.course-brief .wb-notes{grid-template-columns:1fr;gap:18px}
}
@media (max-width:639px){
.course-brief{--pad:20px}
.course-brief{font-size:15px}
.course-brief .paper{margin:2px 10px 28px;border-radius:14px}
.course-brief .doc-head{padding:0}
.course-brief .doc-field{padding:12px 14px 10px;flex:1 1 40%}
.course-brief .doc-field:nth-child(2n){border-right:none}
.course-brief .doc-field span{font-size:12.5px}
.course-brief .hero{padding:36px 0 40px}
.course-brief .hero-meta div{padding:10px 14px 10px 0;margin-right:14px}
.course-brief .hero-meta span{font-size:13.5px}
.course-brief .btn-main{width:100%;text-align:center}
.course-brief .btn-ghost{width:100%;text-align:center}
.course-brief .hero-cta{gap:10px}
.course-brief .mini-row{grid-template-columns:repeat(2,1fr)}
.course-brief .sec{padding:38px 0 42px}
.course-brief .band{padding:42px var(--pad) 44px}
.course-brief .band h2{font-size:20px}
.course-brief .wb-rail{width:38px;gap:9px;padding:14px 0}
.course-brief .wb-dot{width:20px;height:20px;font-size:8.5px}
.course-brief .wb-rail-label{display:none}
.course-brief .wb-paper{margin:10px 8px;padding:13px 13px}
.course-brief .wb-coach{min-width:118px;width:34%;margin:10px 8px 10px 0;padding:10px 10px 8px}
.course-brief .wb-coach-txt{font-size:10.5px}
.course-brief .wb-check li{font-size:10px}
.course-brief .wb-brief-title{font-size:12.5px}
.course-brief .wb-top{gap:9px;padding:9px 10px;font-size:9.5px}
.course-brief .wb-bottom{font-size:9.5px;padding:8px 10px}
.course-brief .plan{padding-left:44px}
.course-brief .plan::before{left:14px}
.course-brief .ch-node{left:-44px;width:28px;height:28px;font-size:11.5px}
.course-brief .lesson{grid-template-columns:40px 1fr;grid-template-areas:"no main" ". meta";gap:2px 10px;padding:12px 4px 12px 0}
.course-brief .lesson-no{grid-area:no}
.course-brief .lesson-main{grid-area:main}
.course-brief .lesson-meta-row{grid-area:meta;display:flex;gap:12px;align-items:center;margin-top:3px}
.course-brief .lesson-type,.course-brief .lesson-min{text-align:left}
.course-brief .lesson-free{justify-self:start}
.course-brief .capstone{margin-left:0}
.course-brief .capstone::before{left:-35px}
.course-brief .capstone::after{left:-30px;width:30px}
.course-brief .inventory{grid-template-columns:1fr;gap:0}
.course-brief .final{gap:26px;padding:40px 0}
.course-brief .final-cta{width:100%}
.course-brief .final-cta .btn-main{width:100%;text-align:center}
}
@media (min-width:640px){
.course-brief .lesson-meta-row{display:contents}
}

/* ============================================================
   以下为站点集成追加块（非原型提取部分）
   1) 外壳同名类冲突中和   2) 进度系统钩子（l-check / progress-card）
   3) 面包屑 / 重制提示     4) 深夜工坊暗色适配（文件尾）
   ============================================================ */

/* —— 外壳冲突中和：shell.css 的同名裸类会漏进来，这里逐条压掉 —— */
.course-brief{--bg-2:var(--line);padding:14px 0 2px}
.course-brief .band{border-top:0;border-bottom:0}
.course-brief .btn-ghost{background:transparent}
.course-brief .btn-ghost:hover{color:var(--ink)}
.course-brief .sec-eyebrow{font-weight:400}
.course-brief .sec-sub{max-width:none}
.course-brief .lesson .lesson-main{display:block;padding:0}  /* 三层类：压过 shell.css 移动端 body.course-codex-mastery .lesson-main 的课时页内边距 */
.course-brief .ch-head{display:block}  /* shell.css .ch-head 是 flex，会把章 kicker 和标题挤到同一行；A 原型为上下堆叠 */

/* —— 面包屑（画布层，纸面之外） —— */
.course-brief .brief-crumb{max-width:1160px;margin:0 auto;padding:4px 24px 10px;font-family:var(--mono);font-size:12px;color:var(--dim);display:flex;gap:8px;flex-wrap:wrap;letter-spacing:.04em}
.course-brief .brief-crumb a:hover{color:var(--ink)}

/* —— 课时行进度钩子：新增勾选列（app.js 注入凿子勾） —— */
.course-brief .lesson{grid-template-columns:20px 46px 1fr 58px 62px 46px;border-top:0}
.course-brief .l-check{width:15px;height:15px;border:1.5px solid var(--line-strong);border-radius:4px;background:var(--white);margin-top:5px;display:inline-flex;align-items:center;justify-content:center;flex:none}
.course-brief .lesson.is-done .l-check{background:var(--green);border-color:var(--green)}
.course-brief .lesson.is-done .lesson-title{color:var(--dim)}
.course-brief .lesson.is-soon{opacity:.55}
.course-brief .lesson.is-soon .l-check{border-style:dashed}

/* —— 收尾进度环卡（markup 与旧课程页同款，纸质物件） —— */
.course-brief .progress-card{background:var(--white);border:1px solid var(--line-strong);border-radius:12px;box-shadow:0 3px 14px rgba(24,35,45,.09);padding:18px 22px 16px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;margin:0;flex:none;width:280px;max-width:100%}
.course-brief .progress-card>div{display:flex;align-items:center;gap:14px}
.course-brief .progress-card .ring-wrap{position:relative;width:46px;height:46px;flex:none;display:grid;place-items:center}
.course-brief .progress-card .ring-wrap svg{display:block;width:46px;height:46px}
.course-brief .progress-card .ring-txt{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:11px;color:var(--dim)}
.course-brief .progress-card .progress-txt{display:grid;gap:2px;flex:1}
.course-brief .progress-card .progress-label{font-size:13.5px;font-weight:700}
.course-brief .progress-card .progress-nums{font-family:var(--mono);font-size:11px;color:var(--dim);font-weight:400}
.course-brief .progress-card .progress-detail{font-family:var(--mono);font-size:10px;line-height:1.5;color:var(--dim);font-weight:400}
.course-brief .progress-card>p{font-size:12px;color:var(--dim);line-height:1.6;margin:0}
.course-brief .progress-card .studio-progress-link{font-family:var(--mono);font-size:12px;color:var(--coral-deep);font-weight:600}

/* —— 重制中提示块（status != open） —— */
.course-brief .brief-rebuild-note{margin:26px 0 4px;border:1.5px dashed var(--coral);border-radius:10px;background:rgba(223,81,48,.05);padding:16px 18px}
.course-brief .brief-rebuild-note strong{display:block;font-size:15px;margin-bottom:4px}
.course-brief .brief-rebuild-note p{font-size:13.5px;color:var(--dim);margin:0}

/* —— 移动端：勾选列进入行网格 —— */
@media (max-width:639px){
  .course-brief .lesson{grid-template-columns:18px 34px 1fr;grid-template-areas:"check no main" ". . meta"}
  .course-brief .l-check{grid-area:check;margin-top:5px}
  .course-brief .lesson-no{grid-area:no}
  .course-brief .progress-card{width:100%}
}

/* ============================================================
   深夜工坊：暗色适配
   画布随 html.dark 翻转；委托书纸面、暖纸单据、实物卡是纸质物件，
   永远保持暖纸+墨字（变量已锁在 .course-brief 作用域内，不随外壳翻转）
   ============================================================ */
html.dark .course-brief{--canvas:#16130f}
html.dark .course-brief .brief-crumb{color:rgba(236,231,220,.58)}
html.dark .course-brief .brief-crumb a:hover{color:#ece7dc}
html.dark .course-brief .paper{border-color:#3a352b;box-shadow:0 30px 70px rgba(0,0,0,.55),0 2px 6px rgba(0,0,0,.35)}
html.dark .course-brief .win{box-shadow:0 18px 44px rgba(0,0,0,.45),0 2px 6px rgba(0,0,0,.25)}
html.dark .course-brief .wb{box-shadow:0 26px 60px rgba(0,0,0,.6)}

/* 毕业成品前置入口：hero CTA 行的效果预览按钮 */
.course-brief .btn-final-result{display:inline-flex;align-items:center;min-height:46px;padding:0 18px;border:1.5px solid var(--accent,#df5130);border-radius:7px;color:var(--accent,#df5130);font-size:14px;font-weight:800;text-decoration:none;white-space:nowrap}
.course-brief .btn-final-result:hover{background:var(--accent,#df5130);color:#fff}

/* V13：课程阶段采用渐进展开，核心与选修不再挤成一条十米长目录。 */
.course-brief details.chapter{padding-bottom:20px}
.course-brief details.chapter:last-child{padding-bottom:4px}
.course-brief .ch-summary{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 44px;gap:16px;align-items:center;min-height:72px;list-style:none;cursor:pointer}
.course-brief .ch-summary::-webkit-details-marker{display:none}
.course-brief .ch-summary .ch-head{margin:0}
.course-brief .ch-toggle{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:50%;color:var(--dim);font-size:20px;transition:transform .2s cubic-bezier(.22,1,.36,1),color .12s,border-color .12s}
.course-brief details[open]>.ch-summary .ch-toggle{transform:rotate(45deg);color:var(--coral-deep);border-color:var(--coral)}
.course-brief details.chapter>.lessons,.course-brief details.chapter>.capstone{margin-right:60px}
.course-brief details.chapter.optional .ch-node{background:#f1ead8;color:#76500f;border:1.5px solid #c8ad74}
.course-brief details.chapter.optional .ch-kicker b{color:#8a6117}
.course-brief details.chapter:not([open]){border-bottom:1px solid var(--line)}
.course-brief details.chapter:not([open]) .ch-dek{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* C02：五幕 HTML 场景演示。像 PPT 一样直观，但保留项目工作台的可信质感。 */
.course-brief .c02-relay-showcase{margin-inline:calc(var(--pad) * -1);padding:54px var(--pad) 58px;background:var(--forest);color:var(--paper)}
.course-brief .relay-showcase-head{display:flex;align-items:end;justify-content:space-between;gap:28px;margin-bottom:24px}
.course-brief .relay-showcase-head p{margin:0 0 8px;color:#f2a085;font-family:var(--mono);font-size:11px;letter-spacing:.11em}
.course-brief .relay-showcase-head h2{margin:0;color:var(--paper);font-size:26px;line-height:1.35}
.course-brief .relay-showcase-head span{display:block;max-width:56em;margin-top:8px;color:rgba(251,248,241,.66);font-size:13px;line-height:1.7}
.course-brief .relay-showcase-head>a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid rgba(251,248,241,.3);border-radius:4px;color:var(--paper);font-size:12px;white-space:nowrap}
.course-brief .relay-player{display:grid;grid-template-columns:minmax(270px,.68fr) minmax(0,1.5fr);min-height:540px;border:1px solid #3b4b40;background:#101b14;box-shadow:0 24px 60px rgba(0,0,0,.28)}
.course-brief .relay-narrator{display:flex;flex-direction:column;padding:38px 32px 28px;border-right:1px solid #3b4b40;background:#f3efe5;color:var(--ink)}
.course-brief .relay-narrator>p{margin:0;color:var(--coral-deep);font-family:var(--mono);font-size:11px;font-weight:750;letter-spacing:.09em}
.course-brief .relay-narrator h3{margin:16px 0 0;font:700 28px/1.3 var(--sans);letter-spacing:-.035em}
.course-brief .relay-narrator>span{display:block;margin-top:18px;color:#53606a;font-size:14px;line-height:1.8}
.course-brief .relay-proof{margin-top:28px;padding:16px 0;border-block:1px solid #d2ccbd}
.course-brief .relay-proof small{display:block;color:var(--dim);font-size:10px}
.course-brief .relay-proof b{display:block;margin-top:6px;font-size:13px;line-height:1.55}
.course-brief .relay-controls{display:grid;grid-template-columns:48px minmax(0,1fr);gap:8px;margin-top:auto;padding-top:24px}
.course-brief .relay-controls button{min-height:48px;border:1px solid #c9c1b1;border-radius:3px;background:transparent;color:var(--ink);font:750 12px var(--sans);cursor:pointer}
.course-brief .relay-controls button:last-child{border-color:var(--coral);background:var(--coral);color:#fff}
.course-brief .relay-controls button:disabled{opacity:.35;cursor:not-allowed}
.course-brief .relay-stage{min-width:0;display:grid;grid-template-rows:44px minmax(0,1fr) 58px;background:#17231b}
.course-brief .relay-stage>header{display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid #39483e;color:#98a49b;font:11px var(--mono)}
.course-brief .relay-stage>header b{color:#e7e5dd;font-weight:600}
.course-brief .relay-scenes{position:relative;min-height:0;overflow:hidden}
.course-brief .relay-scene{position:absolute;inset:0;display:none;overflow:auto;padding:clamp(22px,3.5vw,46px);color:#e7e5dd}
.course-brief .relay-scene.is-active{display:grid;align-items:center;animation:c02SceneIn .32s cubic-bezier(.22,1,.36,1) both}
@keyframes c02SceneIn{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:none}}
.course-brief .relay-dots{display:flex;align-items:center;justify-content:center;gap:7px;border-top:1px solid #39483e}
.course-brief .relay-dots button{width:44px;height:44px;border:0;border-bottom:2px solid transparent;background:transparent;color:#77847b;font:10px var(--mono);cursor:pointer}
.course-brief .relay-dots button.is-current{border-color:var(--coral);color:#fff}
.course-brief .relay-source-wall{display:grid;grid-template-columns:1fr 1fr;border:1px solid #46544a}
.course-brief .relay-source-wall>div{min-height:150px;padding:24px;border-right:1px solid #46544a;border-bottom:1px solid #46544a}
.course-brief .relay-source-wall>div:nth-child(2n){border-right:0}.course-brief .relay-source-wall>div:nth-last-child(-n+2){border-bottom:0}
.course-brief .relay-source-wall i{display:block;color:#d8986f;font:10px var(--mono)}
.course-brief .relay-source-wall b{display:block;margin-top:14px;font-size:19px}.course-brief .relay-source-wall span{display:block;margin-top:8px;color:#8f9b92;font-size:12px}
.course-brief .relay-work-view{display:grid;grid-template-columns:150px minmax(0,1fr);min-height:360px;border:1px solid #46544a;background:#111a14}
.course-brief .relay-app-chrome{display:flex;flex-direction:column;gap:8px;padding:20px;border-right:1px solid #46544a;color:#87948b;font-size:12px}.course-brief .relay-app-chrome b{margin-bottom:16px;color:#f2f0e9;font-size:15px}.course-brief .relay-app-chrome strong{padding:10px;background:#2a3c2f;color:#a8d1b3}
.course-brief .relay-work-main{padding:24px}.course-brief .relay-work-main>p,.course-brief .relay-codex-view>div>p{color:#91a097;font:11px/1.6 var(--mono)}
.course-brief .relay-work-main article{margin-top:20px;padding:24px;background:#f5f1e8;color:var(--ink)}.course-brief .relay-work-main small{color:var(--dim);font:10px var(--mono)}.course-brief .relay-work-main h4{margin:7px 0 15px;font-size:22px}.course-brief .relay-work-main ul{margin:0;padding-left:18px;font-size:13px;line-height:1.8}.course-brief .relay-work-main em{display:block;margin-top:16px;color:var(--green);font-size:11px}
.course-brief .relay-handoff{width:min(620px,100%);margin:auto;padding:28px;background:#f5f1e8;color:var(--ink);transform:rotate(-.5deg)}
.course-brief .relay-handoff>p{margin:0 0 18px;color:var(--coral-deep);font:11px var(--mono)}.course-brief .relay-handoff dl{margin:0;border-top:1px solid #d4cdbc}.course-brief .relay-handoff dl>div{display:grid;grid-template-columns:72px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid #d4cdbc}.course-brief .relay-handoff dt{color:var(--dim);font-size:11px}.course-brief .relay-handoff dd{margin:0;font-size:13px;font-weight:650}.course-brief .relay-handoff>span{display:block;margin-top:18px;color:#5c6871;font-size:12px}
.course-brief .relay-codex-view{display:grid;grid-template-columns:200px minmax(0,1fr);min-height:370px;border:1px solid #46544a;background:#101713}.course-brief .relay-codex-view aside{display:flex;flex-direction:column;gap:12px;padding:20px;border-right:1px solid #46544a;color:#859188;font:11px var(--mono)}.course-brief .relay-codex-view aside b{color:#f0eee7}.course-brief .relay-codex-view aside strong{color:#c0c9c2}.course-brief .relay-codex-view aside em{padding-left:10px;color:#8fc39f}.course-brief .relay-codex-view>div{padding:22px}.course-brief .relay-codex-view article{margin-top:22px;padding:22px;background:#f5f1e8;color:var(--ink)}.course-brief .relay-codex-view h4{margin:0 0 20px;font-size:21px}.course-brief .relay-codex-view article>div{display:grid;grid-template-columns:auto 1fr auto 1fr auto 1fr;gap:8px;align-items:end}.course-brief .relay-codex-view article b{font-size:26px}.course-brief .relay-codex-view article span{padding-bottom:5px;color:var(--dim);font-size:10px}.course-brief .relay-codex-view article i{display:block;margin-top:24px;color:var(--green);font-size:11px}
.course-brief .relay-finish-view{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:34px;align-items:center}.course-brief .relay-finish-view small{color:#d8986f;font:10px var(--mono)}.course-brief .relay-finish-view h4{margin:10px 0 14px;color:#f3f0e8;font-size:38px;line-height:1.2}.course-brief .relay-finish-view p{max-width:35em;color:#a9b3ac;font-size:13px;line-height:1.75}.course-brief .relay-finish-view a{display:inline-flex;align-items:center;min-height:44px;margin-top:20px;padding:0 14px;background:var(--coral);color:#fff;font-size:12px}.course-brief .relay-finish-view ol{list-style:none;margin:0;padding:0;border-top:1px solid #46544a}.course-brief .relay-finish-view li{display:grid;grid-template-columns:28px 1fr;gap:8px;padding:14px 0;border-bottom:1px solid #46544a}.course-brief .relay-finish-view li span{grid-row:1/3;color:#748178;font:10px var(--mono)}.course-brief .relay-finish-view li b{font-size:12px}.course-brief .relay-finish-view li em{color:#8fc39f;font-size:10px}
.course-brief .relay-showcase-note{max-width:72em;margin:18px 0 0;color:rgba(251,248,241,.55);font-size:11.5px;line-height:1.7}

@media(max-width:900px){
  .course-brief .relay-player{grid-template-columns:1fr;min-height:760px}.course-brief .relay-narrator{min-height:300px;border-right:0;border-bottom:1px solid #3b4b40}.course-brief .relay-stage{min-height:460px}.course-brief .relay-showcase-head{align-items:start;flex-direction:column}.course-brief details.chapter>.lessons,.course-brief details.chapter>.capstone{margin-right:0}
}
@media(max-width:639px){
  .course-brief .c02-relay-showcase{padding-block:38px 42px}.course-brief .relay-player{min-height:820px}.course-brief .relay-narrator{min-height:330px;padding:26px 20px 20px}.course-brief .relay-narrator h3{font-size:23px}.course-brief .relay-stage{min-height:490px}.course-brief .relay-scene{padding:18px 14px}.course-brief .relay-source-wall>div{min-height:120px;padding:16px}.course-brief .relay-work-view{grid-template-columns:98px 1fr}.course-brief .relay-app-chrome{padding:12px}.course-brief .relay-work-main{padding:12px}.course-brief .relay-work-main article{padding:16px}.course-brief .relay-codex-view{grid-template-columns:105px 1fr}.course-brief .relay-codex-view aside,.course-brief .relay-codex-view>div{padding:12px}.course-brief .relay-codex-view article{padding:14px}.course-brief .relay-codex-view article>div{grid-template-columns:auto 1fr auto 1fr}.course-brief .relay-codex-view article b:nth-of-type(3),.course-brief .relay-codex-view article b:nth-of-type(3)+span{display:none}.course-brief .relay-finish-view{grid-template-columns:1fr}.course-brief .relay-finish-view h4{font-size:30px}.course-brief .relay-finish-view ol{display:none}.course-brief .ch-summary{grid-template-columns:minmax(0,1fr) 44px}.course-brief .ch-node{left:-44px}.course-brief details.chapter:not([open]) .ch-dek{white-space:normal;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.course-brief .progress-card .progress-detail{font-size:9.5px}
}
@media(prefers-reduced-motion:reduce){.course-brief .relay-scene.is-active{animation:none}.course-brief .ch-toggle{transition:none}}