:root{--paper:#f8f5ec;--ink:#25372b;--muted:#536357;--green:#2c4836;--line:#d7ddd0;--light:#eef1e6}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.75 system-ui,sans-serif}a{color:#315a40;text-underline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #aa622b;outline-offset:3px}h1,h2,h3,.brand{font-family:"Songti SC","Noto Serif CJK SC",serif;line-height:1.25}header,main,footer{max-width:1200px;margin:auto;padding-inline:clamp(20px,5vw,64px)}header{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:76px}header a{text-decoration:none}.brand{font-size:28px;font-weight:bold;color:var(--ink)}nav{display:flex;gap:20px;flex-wrap:wrap}.hero{background:#e9eee1;display:grid;grid-template-columns:1fr .85fr;align-items:center;overflow:hidden;border-radius:4px;padding:clamp(24px,5vw,65px);gap:20px}.hero h1{font-size:clamp(36px,6vw,75px);margin:12px 0 18px;letter-spacing:.03em}.eyebrow{font-size:13px;letter-spacing:.16em;color:var(--muted);font-weight:700}.hero p{max-width:32em}.hero svg{width:100%;max-height:330px}.cta{display:inline-block;color:white;background:var(--green);padding:10px 18px;text-decoration:none;margin-top:10px;border-radius:3px}section{margin:54px 0}h2{font-size:32px;margin:0 0 10px}.muted{color:var(--muted)}.topics{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.topics button{font:inherit;padding:5px 13px;border:1px solid #9dad9e;border-radius:20px;background:transparent;color:var(--green);cursor:pointer}.topics button[aria-pressed=true]{background:var(--green);color:white}.search{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.search input{font:inherit;min-width:0;width:min(100%,430px);padding:10px 12px;border:1px solid #8d9c8d;background:#fffdf6;border-radius:3px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.card{display:block;min-height:170px;border:1px solid var(--line);background:#fffdf6;padding:18px;text-decoration:none;color:var(--ink)}.card:hover{border-color:#45694d}.card h3{margin:8px 0;font-size:22px}.card p{margin:0;color:var(--muted);font-size:14px}article{scroll-margin-top:16px;padding:24px 0;border-top:1px solid var(--line);max-width:790px}article h3{font-size:24px;margin:7px 0}article p{margin:8px 0}.source{font-size:14px}.note{background:var(--light);padding:24px}.note p{max-width:48em}footer{padding-block:20px 45px;color:var(--muted);font-size:14px}[hidden]{display:none!important}@media(max-width:750px){.hero{grid-template-columns:1fr}.hero svg{max-height:185px}.grid{grid-template-columns:repeat(2,1fr)}header{align-items:flex-start;padding-block:14px}nav{gap:8px 12px}section{margin:34px 0}}@media(max-width:470px){.grid{grid-template-columns:1fr}.card{min-height:auto}.hero h1{font-size:38px}}

.page-head{padding:34px 0 20px}.page-head h1{font-size:clamp(30px,5vw,55px);margin:8px 0}
nav a[aria-current=page]{font-weight:700;text-decoration:underline}
.topic-grid .card{min-height:135px}.links{padding-left:20px}.links li{margin:8px 0}
.article-body{max-width:790px}.article-body p{margin:16px 0}.back{display:inline-block;margin-top:22px}
footer{border-top:1px solid var(--line);display:flex;gap:18px;flex-wrap:wrap}
#search-results{margin-top:12px}.search{margin:12px 0}

header,main,footer{max-width:980px;padding-inline:clamp(14px,4vw,42px)}
header{flex-direction:column;align-items:flex-start;gap:4px;padding-block:12px}
nav{gap:4px 8px}nav a{display:inline-flex;min-height:44px;align-items:center;padding:4px 7px}
.hero{grid-template-columns:minmax(0,1fr) minmax(0,.58fr)}
.grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.player{padding:18px;background:var(--light);margin-bottom:24px}
.controls{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.controls button,.links button,select,.listen-link{font:inherit;color:var(--green);padding:8px 12px;min-height:44px;border:1px solid #9dad9e;background:#fffdf6;border-radius:4px}
.controls button,.links button{cursor:pointer}.links button[aria-current=true]{font-weight:700;background:#e0ebdc}
.controls button:disabled{opacity:.5;cursor:default}.listen-link{display:inline-block}
.format{display:flex;align-items:center;gap:8px}
@media(max-width:600px){.hero,.grid{grid-template-columns:1fr}.hero svg{max-height:145px}.hero h1{font-size:38px}nav{font-size:15px}}
.lesson-player video{display:block;width:100%;max-height:70vh;background:#1d2a21;aspect-ratio:16/9}
.lesson-player audio{display:block;width:100%;margin:8px 0}
.lesson-player h3{font-size:20px;margin:16px 0 4px}.lesson-player .links button{text-align:left}
.badge{display:inline-block;font:600 13px/1.6 system-ui,sans-serif;color:#7a4a1f;background:#f4e6c4;border-radius:3px;padding:0 6px;vertical-align:middle}
.test-notice{background:#f4e6c4;padding:10px 14px;border-radius:4px}.caption-line{min-height:1.75em;color:var(--muted)}
.media-pending{color:var(--muted);font-size:14px;border-left:3px solid var(--line);padding:2px 0 2px 12px;margin:18px 0}.lesson-link{margin:18px 0 0;font-weight:600}.links li>p{margin:2px 0 0;color:var(--muted);font-size:14px}
.persona-slot{margin:22px 0 0}.persona-placeholder{display:flex;align-items:center;justify-content:center;width:min(100%,240px);aspect-ratio:2/3;border:1px dashed #9dad9e;background:var(--light);color:var(--muted);font-size:14px;border-radius:4px;text-align:center;padding:12px}