:root{
  --ink:#011d2e;
  --ink-2:#08283a;
  --paper:#f3ebe4;
  --paper-2:#fffaf4;
  --muted:#b8afa7;
  --gold:#c99a4e;
  --gold-soft:#e4c081;
  --line:rgba(201,154,78,.26);
  --course-accent:#d9864a;
  --course-green:#78936c;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{min-height:100vh;background:var(--ink);color:var(--paper);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit}
button,input{font:inherit}
img{display:block;max-width:100%}
.serif{font-family:"Songti SC","STSong","Noto Serif SC","SimSun",serif}
.site-nav{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:18px 5vw;background:linear-gradient(to bottom,rgba(1,29,46,.98),rgba(1,29,46,.84) 65%,rgba(1,29,46,0));}
.brand{display:flex;align-items:center;text-decoration:none;min-width:0}
.brand img{width:auto;height:64px}
.nav-links{display:flex;align-items:center}
.nav-links a{margin-left:22px;color:var(--muted);font-size:13px;letter-spacing:1.6px;text-decoration:none;white-space:nowrap;transition:color .25s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--gold-soft)}
.nav-links a[aria-current="page"]{position:relative;color:var(--paper)}
.nav-links a[aria-current="page"]::after{content:"";position:absolute;left:0;right:1px;bottom:-8px;height:1px;background:var(--gold)}
.nav-links .nav-cta{padding:9px 20px;border-radius:999px;color:var(--ink);background:linear-gradient(135deg,var(--gold-soft),var(--gold));font-weight:700}
.catalog-main{max-width:1180px;margin:0 auto;padding:150px 5vw 110px}
.catalog-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,360px);align-items:end;gap:70px;padding-bottom:48px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--gold);font-size:12px;letter-spacing:3px;text-transform:uppercase}
.catalog-head h1{max-width:760px;margin-top:18px;font-size:clamp(42px,5.2vw,74px);line-height:1.1;letter-spacing:.025em;font-weight:700}
.catalog-head p{color:var(--muted);font-size:16px;line-height:1.9}
.catalog-head p strong{display:block;margin-bottom:10px;color:var(--paper);font-size:14px;letter-spacing:1px}
.catalog-label{display:flex;align-items:center;justify-content:space-between;margin:30px 0 8px;color:var(--muted);font-size:12px;letter-spacing:2px}
.catalog-label strong{color:var(--gold);font-weight:500}
.course-list{border-top:1px solid var(--line)}
.course-card{position:relative;display:grid;grid-template-columns:minmax(260px,360px) minmax(0,1fr) auto;align-items:center;gap:42px;padding:38px 0;border-bottom:1px solid var(--line)}
.course-card::before{content:var(--card-index);position:absolute;right:0;top:16px;color:rgba(201,154,78,.42);font:italic 16px/1 Georgia,serif}
.course-cover{position:relative;overflow:hidden;aspect-ratio:16/9;border:1px solid var(--line);border-radius:16px;background:linear-gradient(135deg,var(--course-accent),var(--course-green));text-decoration:none}
.course-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s,filter .4s}
.course-cover:hover img,.course-cover:focus-visible img{transform:scale(1.02);filter:saturate(1.08)}
.course-cover span{position:absolute;left:14px;bottom:14px;padding:7px 10px;border:1px solid rgba(255,255,255,.42);border-radius:999px;background:rgba(1,29,46,.76);color:#fff;font-size:11px;letter-spacing:1.4px;backdrop-filter:blur(8px)}
.course-cover.is-missing img{display:none}
.course-copy{min-width:0}
.course-kicker{color:var(--gold);font-size:11px;letter-spacing:2.2px}
.course-copy h2{margin-top:12px;font-size:clamp(28px,3vw,42px);line-height:1.3;letter-spacing:.035em}
.course-copy h2 a{text-decoration:none}
.course-copy p{max-width:620px;margin-top:12px;color:var(--muted);font-size:15px;line-height:1.85}
.course-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:18px;color:var(--muted);font-size:12px;letter-spacing:.7px}
.course-meta span+span::before{content:"·";margin-right:18px;color:var(--gold)}
.course-open{align-self:center;padding:10px 0 8px;border-bottom:1px solid var(--gold);font-size:14px;letter-spacing:1.5px;text-decoration:none;white-space:nowrap}
.catalog-empty{padding:44px 0;border-bottom:1px solid var(--line);color:var(--muted)}
.course-main{max-width:1200px;margin:0 auto;padding:132px 5vw 110px}
.breadcrumbs{display:flex;align-items:center;gap:9px;margin-bottom:26px;color:var(--muted);font-size:12px;letter-spacing:1px}
.breadcrumbs a{text-decoration:none}
.breadcrumbs a:hover{color:var(--gold-soft)}
.course-hero{display:grid;grid-template-columns:minmax(320px,.88fr) minmax(0,1.12fr);gap:6vw;align-items:center;padding:30px 0 62px;border-bottom:1px solid var(--line)}
.hero-cover{position:relative;overflow:hidden;aspect-ratio:1/1;border:1px solid var(--line);border-radius:24px;background:linear-gradient(145deg,var(--course-accent),var(--course-green));box-shadow:0 30px 80px rgba(0,0,0,.2)}
.hero-cover img{width:100%;height:100%;object-fit:cover;transform:scale(1.19)}
.hero-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(1,29,46,.82),transparent 58%)}
.cover-note{position:absolute;z-index:2;left:24px;right:24px;bottom:22px;display:flex;justify-content:space-between;gap:16px;color:#fff;font-size:11px;letter-spacing:1.5px}
.course-hero h1{max-width:690px;margin-top:16px;font-size:clamp(46px,5.4vw,76px);line-height:1.08;letter-spacing:.015em}
.course-deck{max-width:650px;margin-top:20px;color:var(--muted);font-size:17px;line-height:1.85}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;color:var(--paper);font-size:13px}
.hero-meta span+span::before{content:"·";margin-right:22px;color:var(--gold)}
.voice-badge{display:inline-flex;align-items:center;gap:7px;margin-top:20px;padding:8px 12px;border:1px solid rgba(217,134,74,.55);border-radius:999px;color:#f2c49f;font-size:12px;letter-spacing:.6px}
.voice-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--course-accent)}
.audio-player{margin-top:28px;padding:20px 20px 16px;border:1px solid var(--line);border-radius:18px;background:rgba(8,40,58,.72)}
.player-row{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:18px}
.player-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:70px;height:48px;padding:0 16px;border:0;border-radius:999px;background:var(--paper);color:var(--ink);font-weight:700;cursor:pointer}
.player-toggle:hover{background:var(--gold-soft)}
.player-toggle:disabled{cursor:not-allowed;opacity:.45}
.player-times{color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px;white-space:nowrap}
.player-track{position:relative}
.player-track input{display:block;width:100%;height:28px;margin:0;cursor:pointer;appearance:none;background:transparent}
.player-track input::-webkit-slider-runnable-track{height:3px;border-radius:99px;background:linear-gradient(to right,var(--course-accent) 0 var(--progress,0%),rgba(243,235,228,.22) var(--progress,0%) 100%)}
.player-track input::-webkit-slider-thumb{width:14px;height:14px;margin-top:-5.5px;border:2px solid var(--paper);border-radius:50%;appearance:none;background:var(--course-accent)}
.player-track input::-moz-range-track{height:3px;border-radius:99px;background:rgba(243,235,228,.22)}
.player-track input::-moz-range-progress{height:3px;background:var(--course-accent)}
.player-track input::-moz-range-thumb{width:12px;height:12px;border:2px solid var(--paper);border-radius:50%;background:var(--course-accent)}
.player-status{margin-top:10px;color:var(--muted);font-size:12px;letter-spacing:.7px}
.audio-player[data-status="playing"] .player-status{color:#f2c49f}
.audio-player[data-status="error"]{border-color:rgba(215,92,72,.55)}
.course-body{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(250px,.65fr);gap:8vw;padding-top:62px}
.content-section+.content-section{margin-top:62px}
.section-number{color:var(--gold);font:italic 16px/1 Georgia,serif}
.content-section h2{margin-top:12px;font-size:clamp(30px,3.3vw,46px);line-height:1.25;letter-spacing:.03em}
.content-section>p{margin-top:18px;color:var(--muted);font-size:16px;line-height:1.9}
.content-section h2 small{margin-left:8px;color:var(--muted);font:500 11px/1.4 var(--sans);letter-spacing:1px;vertical-align:middle}
.idea-points{display:grid;gap:14px;margin-top:24px;list-style:none}
.idea-points li{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:18px 0;border-top:1px solid var(--line);color:var(--muted);font-size:15px;line-height:1.8}
.idea-points>li>strong{color:var(--gold);font:italic 17px/1.8 Georgia,serif}
.idea-points b{display:block;margin-bottom:3px;color:var(--paper);font-size:14px;letter-spacing:.5px}
.chapter-list{margin-top:24px;border-top:1px solid var(--line)}
.chapter-list button{display:grid;grid-template-columns:64px minmax(0,1fr) auto;align-items:center;width:100%;padding:17px 0;border:0;border-bottom:1px solid var(--line);background:transparent;color:var(--paper);text-align:left;cursor:pointer}
.chapter-list button:hover,.chapter-list button:focus-visible{color:var(--gold-soft)}
.chapter-list time{color:var(--gold);font-variant-numeric:tabular-nums;font-size:12px}
.chapter-list span{font-size:15px;letter-spacing:.5px}
.chapter-list em{color:var(--muted);font-size:12px;font-style:normal}
.making-flow{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px;margin-top:24px;list-style:none;border-top:1px solid var(--line)}
.making-flow li{display:grid;grid-template-columns:34px 1fr;gap:12px;padding:20px 0;border-bottom:1px solid var(--line)}
.making-flow>li>span{color:var(--gold);font:italic 15px/1.6 Georgia,serif}
.making-flow strong{color:var(--paper);font-size:14px;letter-spacing:.5px}
.making-flow p{margin-top:6px;color:var(--muted);font-size:13.5px;line-height:1.75}
.transcript{margin-top:24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.transcript summary{padding:18px 0;color:var(--paper);font-size:15px;cursor:pointer;list-style:none}
.transcript summary::-webkit-details-marker{display:none}
.transcript summary::after{content:"＋";float:right;color:var(--gold)}
.transcript[open] summary::after{content:"－"}
.transcript-copy{padding:4px 0 28px;color:var(--muted);font-size:15px;line-height:2}
.transcript-copy p+p{margin-top:18px}
.course-aside{position:relative}
.aside-sticky{position:sticky;top:126px}
.aside-card{padding:25px;border:1px solid var(--line);border-radius:18px;background:rgba(8,40,58,.65)}
.aside-card+.aside-card{margin-top:18px}
.aside-card h2{font-size:18px;letter-spacing:.04em}
.aside-card p,.aside-card li{margin-top:12px;color:var(--muted);font-size:13.5px;line-height:1.85}
.aside-card ul{padding-left:18px}
.aside-card.work-info{border-color:rgba(201,154,78,.46);background:rgba(201,154,78,.055)}
.work-facts{margin-top:13px}
.work-facts div{display:grid;grid-template-columns:50px 1fr;gap:12px;padding:9px 0;border-top:1px solid var(--line);font-size:12.5px;line-height:1.6}
.work-facts dt{color:var(--muted)}
.work-facts dd{color:var(--paper)}
.aside-card a{color:var(--gold-soft);text-underline-offset:4px}
.disclosure{margin-top:62px;padding:26px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:13px;line-height:1.85}
.disclosure strong{color:var(--paper)}
.back-link{display:inline-flex;margin-top:34px;padding-bottom:6px;border-bottom:1px solid var(--gold);text-decoration:none;letter-spacing:1px}
footer{border-top:1px solid rgba(201,154,78,.16);padding:64px 5vw;text-align:center;color:var(--muted);font-size:12px;letter-spacing:1.7px;line-height:2}
footer img{width:min(320px,80vw);height:auto;margin:0 auto 16px}
:focus-visible{outline:2px solid var(--gold-soft);outline-offset:4px}
@media(max-width:960px){
  .site-nav{padding:13px 4vw}
  .brand img{content:url("/assets/todo-shield.png");width:38px;height:38px;object-fit:contain}
  .nav-links{max-width:calc(100vw - 78px);gap:13px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
  .nav-links::-webkit-scrollbar{display:none}
  .nav-links a{margin-left:0;font-size:11.5px;letter-spacing:.7px}
  .nav-links .nav-cta{display:none}
  .catalog-main,.course-main{padding-top:108px}
  .catalog-head{grid-template-columns:1fr;gap:26px}
  .course-card{grid-template-columns:minmax(230px,330px) minmax(0,1fr);gap:30px}
  .course-open{grid-column:2}
  .course-hero{grid-template-columns:minmax(270px,.8fr) minmax(0,1.2fr);gap:5vw}
  .course-body{grid-template-columns:1fr;gap:54px}
  .making-flow{grid-template-columns:1fr}
  .aside-sticky{position:static}
}
@media(max-width:680px){
  .site-nav{padding-left:14px;padding-right:14px}
  .nav-links{max-width:calc(100vw - 70px);gap:9px}
  .nav-links a{font-size:10.5px;letter-spacing:.2px}
  .catalog-main,.course-main{padding-left:20px;padding-right:20px}
  .catalog-head{gap:17px;padding-bottom:23px}
  .catalog-head h1{margin-top:12px;font-size:36px;line-height:1.14}
  .catalog-head p{font-size:13.5px;line-height:1.65}
  .catalog-head p strong{margin-bottom:6px}
  .catalog-label{margin-top:18px}
  .course-card{grid-template-columns:1fr;gap:0;padding:20px 0 28px}
  .course-copy{margin-top:16px}
  .course-copy h2{margin-top:8px;font-size:29px;line-height:1.22}
  .course-copy p{margin-top:8px;font-size:14px;line-height:1.65}
  .course-meta{display:flex;gap:6px 12px;margin-top:12px;font-size:11px}
  .course-meta span+span::before{display:inline;margin-right:12px}
  .course-open{grid-column:1;margin-top:16px;justify-self:start}
  .course-hero{grid-template-columns:1fr;padding-top:10px}
  .hero-cover{aspect-ratio:16/9;border-radius:18px}
  .hero-cover img{transform:scale(1.04)}
  .course-hero h1{margin-top:12px;font-size:38px}
  .course-deck{margin-top:14px;font-size:15px;line-height:1.72}
  .hero-meta{display:grid;gap:5px;margin-top:16px;font-size:12px}
  .hero-meta span+span::before{display:none}
  .voice-badge{margin-top:14px}
  .audio-player{margin-top:18px}
  .player-row{grid-template-columns:auto minmax(0,1fr);gap:14px}
  .player-times{grid-column:2;text-align:right}
  .course-body{padding-top:48px}
  .content-section+.content-section{margin-top:50px}
  .chapter-list button{grid-template-columns:54px minmax(0,1fr)}
  .chapter-list em{display:none}
}
@media(max-width:430px){
  .brand img{width:34px;height:34px}
  .nav-links{gap:7px}
  .nav-links a{font-size:10px;letter-spacing:0}
  .catalog-main,.course-main{padding-top:90px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.course-cover img{transition:none}}