/* 课程目录 v2 · 选择路径、搜索、完整课程库 */
.courses-hub-page{overflow-x:clip}
.courses-hub{width:min(100%,1440px);margin:0 auto;padding:0 clamp(20px,4vw,64px) 80px}
.courses-eyebrow{display:inline-flex;align-items:center;gap:10px;margin:0 0 18px;font:600 12px/1 var(--serif);letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.courses-eyebrow::before{content:"";width:48px;height:4px;border-radius:2px;background:var(--accent)}

.courses-hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(340px,.72fr);gap:clamp(32px,5vw,76px);align-items:center;min-height:min(760px,calc(100vh - 56px));padding:clamp(64px,9vh,112px) 0 clamp(56px,8vh,96px)}
.courses-hero-copy h1{margin:0;font:700 clamp(48px,6.3vw,88px)/1.02 var(--serif);letter-spacing:-.045em;color:var(--text-primary)}
.courses-hero-copy h1 em{font-style:normal;color:var(--accent)}
.courses-lede{max-width:720px;margin:26px 0 0;font-size:clamp(16px,1.6vw,20px);line-height:1.85;color:var(--text-secondary)}
.courses-search-shell{max-width:720px;margin-top:34px}
.courses-search-shell label{display:block;margin-bottom:9px;font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--text-muted)}
.courses-search{width:100%;min-height:58px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:13px;padding:0 18px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card);color:var(--text-secondary);text-align:left;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease}
.courses-search:hover,.courses-search:focus-visible{border-color:var(--accent);box-shadow:var(--shadow-md);transform:translateY(-1px);outline:none}
.courses-search>span:first-child{font:700 25px/1 var(--serif);color:var(--accent)}
.courses-search kbd{padding:5px 8px;border:1px solid var(--border);border-bottom-width:2px;border-radius:var(--radius-sm);background:var(--bg-tertiary);color:var(--text-muted);font:600 11px/1 var(--mono)}
.courses-stats{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;color:var(--text-muted);font-size:13px}
.courses-stats span{display:inline-flex;align-items:baseline;gap:6px}
.courses-stats strong{font:700 20px/1 var(--serif);color:var(--text-primary)}

.courses-pathfinder{position:relative;padding:clamp(26px,3vw,38px);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card);box-shadow:var(--shadow-md)}
.courses-pathfinder::before{content:"PATH";position:absolute;right:20px;top:13px;font:700 clamp(40px,5vw,72px)/1 var(--serif);letter-spacing:.02em;color:var(--accent-soft);opacity:.35;pointer-events:none}
.pathfinder-kicker{position:relative;margin:0;color:var(--accent);font:600 12px/1.5 var(--sans);letter-spacing:.08em}
.courses-pathfinder h2{position:relative;margin:10px 0 24px;font:700 clamp(26px,3vw,36px)/1.25 var(--serif);color:var(--text-primary)}
.pathfinder-list{position:relative;display:grid}
.pathfinder-list a{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:12px;padding:18px 0;border-top:1px solid var(--border-light);color:var(--text-secondary);transition:color .18s ease,padding-left .18s ease}
.pathfinder-list a:hover,.pathfinder-list a:focus-visible{color:var(--accent);padding-left:5px;outline:none}
.pathfinder-no{font:700 14px/1 var(--serif);color:var(--accent)}
.pathfinder-list strong{display:block;color:var(--text-primary);font:700 16px/1.45 var(--serif)}
.pathfinder-list small{display:block;margin-top:4px;font-size:12px;line-height:1.55;color:var(--text-muted)}

.courses-process{padding:clamp(56px,8vh,96px) 0;border-top:1px solid var(--border)}
.courses-section-head{display:grid;grid-template-columns:minmax(260px,.72fr) minmax(0,1fr);column-gap:clamp(32px,7vw,100px);align-items:end;margin-bottom:42px}
.courses-section-head .courses-eyebrow{grid-column:1/-1}
.courses-section-head h2{margin:0;font:700 clamp(32px,4.4vw,54px)/1.15 var(--serif);letter-spacing:-.025em;color:var(--text-primary)}
.courses-section-head>p:last-child{max-width:560px;margin:0 0 5px;font-size:16px;line-height:1.8;color:var(--text-secondary)}
.courses-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,36px);list-style:none;margin:0;padding:0}
.courses-steps li{position:relative;padding:60px 22px 10px 0;border-top:2px solid var(--border)}
.courses-steps li::before{content:attr(data-step);position:absolute;top:14px;left:0;font:700 26px/1 var(--serif);color:var(--accent)}
.courses-steps li:not(:last-child)::after{content:"";position:absolute;top:-2px;left:0;width:34%;height:2px;background:var(--accent)}
.courses-steps strong{display:block;margin-bottom:9px;font:700 21px/1.35 var(--serif);color:var(--text-primary)}
.courses-steps span{display:block;max-width:320px;line-height:1.75;color:var(--text-secondary)}

.courses-library{margin-inline:calc(clamp(20px,4vw,64px) * -1);padding:clamp(64px,9vh,108px) clamp(20px,4vw,64px);background:var(--bg-secondary);border-block:1px solid var(--border)}
.courses-library-head{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:end;max-width:1312px;margin:0 auto 38px}
.courses-library-head h2{margin:0;font:700 clamp(36px,5vw,62px)/1.1 var(--serif);letter-spacing:-.03em;color:var(--text-primary)}
.courses-library-head>div:first-child>p:last-child{max-width:720px;margin:16px 0 0;line-height:1.75;color:var(--text-secondary)}
.courses-filter{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}
.courses-filter button{min-height:40px;padding:0 16px;border:1px solid var(--border);border-radius:var(--radius-full);background:var(--bg-card);color:var(--text-secondary);font-size:13px;transition:background .18s ease,border-color .18s ease,color .18s ease}
.courses-filter button:hover,.courses-filter button:focus-visible{border-color:var(--accent);color:var(--accent);outline:none}
.courses-filter button.is-active{border-color:var(--accent);background:var(--accent);color:#fdfaf2}

.courses-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;max-width:1312px;margin:0 auto}
.course-card{display:flex;flex-direction:column;min-width:0;padding:clamp(24px,3vw,36px);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.course-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 48%,var(--border));box-shadow:var(--shadow-md)}
.course-card[hidden]{display:none!important}
.course-card-wide{grid-column:1/-1;display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.5fr);column-gap:clamp(30px,6vw,90px)}
.course-card-wide .course-card-top,.course-card-wide h3,.course-card-wide .course-for,.course-card-wide .course-desc{grid-column:1}
.course-card-wide .course-tags,.course-card-wide .course-card-actions{grid-column:2;align-self:end}
.course-card-wide .course-tags{align-self:start;margin-top:52px}
.course-card-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.course-index{font:700 clamp(30px,3.5vw,44px)/1 var(--serif);color:var(--accent)}
.course-badge{padding:6px 10px;border:1px solid var(--border);border-radius:var(--radius-full);font-size:11px;font-weight:600;letter-spacing:.06em;color:var(--text-muted)}
.course-card h3{margin:24px 0 14px;font:700 clamp(24px,2.6vw,34px)/1.25 var(--serif);letter-spacing:-.02em;color:var(--text-primary)}
.course-card h3 a:hover,.course-card h3 a:focus-visible{color:var(--accent);outline:none}
.course-for{margin:0 0 10px;font-size:13px;font-weight:600;line-height:1.65;color:var(--accent-2)}
.course-desc{max-width:680px;margin:0;line-height:1.8;color:var(--text-secondary)}
.course-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:24px}
.course-tags span{padding:6px 10px;border-radius:var(--radius-full);background:var(--bg-tertiary);border:1px solid var(--border-light);font-size:11px;color:var(--text-muted)}
.course-card-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:28px}
.course-enter{display:inline-flex;align-items:center;gap:10px;color:var(--accent);font-weight:700}
.course-enter:hover,.course-enter:focus-visible{color:var(--accent-2);outline:none}
.course-offer{font-size:12px;line-height:1.5;color:var(--text-muted);border-bottom:1px dashed var(--border)}
.course-offer:hover,.course-offer:focus-visible{color:var(--accent);border-color:var(--accent);outline:none}
.courses-empty{max-width:1312px;margin:20px auto 0;padding:24px;border:1px dashed var(--border);border-radius:var(--radius-lg);text-align:center;color:var(--text-secondary);background:var(--bg-card)}
.courses-disclosure{max-width:1312px;margin:22px auto 0;font-size:12px;line-height:1.7;color:var(--text-muted)}

.courses-outro{margin-inline:calc(clamp(20px,4vw,64px) * -1);padding:clamp(76px,11vh,132px) clamp(20px,4vw,64px);text-align:center;background:#1a1610;color:#f0e6d2}
.courses-outro>p{margin:0 0 18px;font:600 12px/1 var(--serif);letter-spacing:.18em;text-transform:uppercase;color:#d4a857}
.courses-outro h2{margin:0;font:700 clamp(38px,6vw,72px)/1.12 var(--serif);letter-spacing:-.03em;color:#f0e6d2}
.courses-outro span{display:block;max-width:620px;margin:24px auto 0;line-height:1.75;color:#c9b894}

@media(max-width:1080px){
  .courses-hero{grid-template-columns:minmax(0,1fr) minmax(320px,.72fr);gap:34px}
  .courses-hero-copy h1{font-size:clamp(46px,6.4vw,68px)}
  .courses-library-head{grid-template-columns:1fr}
  .courses-filter{justify-content:flex-start}
}
@media(max-width:900px){
  .courses-hero{grid-template-columns:1fr;min-height:0;padding-top:64px}
  .courses-pathfinder{max-width:760px}
  .courses-section-head{grid-template-columns:1fr;gap:18px}
  .courses-steps{grid-template-columns:1fr}
  .courses-steps li{padding:24px 0 24px 56px}
  .courses-steps li::before{top:23px}
  .courses-steps li:not(:last-child)::after{width:2px;height:100%;top:0;left:38px;background:var(--border)}
  .courses-grid{grid-template-columns:1fr}
  .course-card-wide{grid-column:auto;display:flex}
  .course-card-wide .course-tags{margin-top:24px}
}
@media(max-width:560px){
  .courses-hub{padding-inline:18px;padding-bottom:54px}
  .courses-hero{padding-top:48px;padding-bottom:58px}
  .courses-hero-copy h1{font-size:clamp(42px,13vw,58px);letter-spacing:-.035em}
  .courses-lede{font-size:16px;line-height:1.75}
  .courses-search{grid-template-columns:auto 1fr;min-height:56px;padding-inline:15px}
  .courses-search kbd{display:none}
  .courses-stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .courses-stats span:last-child{grid-column:1/-1}
  .courses-pathfinder{padding:24px 20px}
  .pathfinder-list a{grid-template-columns:28px minmax(0,1fr) auto}
  .courses-library{margin-inline:-18px;padding-inline:18px}
  .courses-filter{display:grid;grid-template-columns:1fr 1fr;width:100%}
  .course-card{padding:24px 20px}
  .course-card-actions{align-items:flex-start;flex-direction:column}
  .courses-outro{margin-inline:-18px;padding-inline:18px}
}
@media(prefers-reduced-motion:reduce){
  .course-card,.courses-search,.pathfinder-list a{transition:none}
}