*{box-sizing:border-box} :root{--paper:#fff9ee;--ink:#303b32;--muted:#74796c;--green:#607750;--soft:#e7eedb;--border:#e9e6dc}body{margin:0;background:#e9ece5;color:var(--ink);font-family:'Microsoft YaHei',system-ui,sans-serif;line-height:1.65}.app{max-width:560px;min-height:100vh;margin:auto;padding:28px 22px 106px;background:var(--paper)}h1{font-size:32px;line-height:1.4;letter-spacing:-1px;margin:12px 0}h2{font-size:20px;margin:8px 0 14px}h3{font-size:17px;line-height:1.55;margin:3px 0 6px}p{margin:0;color:var(--muted);font-size:14px}a{color:var(--green)}button,input,select{font:inherit}button,.button{display:inline-block;border:0;border-radius:12px;padding:11px 16px;background:var(--green);color:white;cursor:pointer;text-decoration:none;font-size:14px}button:disabled{opacity:.55;cursor:not-allowed}button:hover,.button:hover{filter:brightness(.97)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #acbe85;outline-offset:3px}.light{background:var(--soft);color:#405735}.small{padding:7px 11px;font-size:12px}.eyebrow{font-size:12px;color:#718367;letter-spacing:1px}header{margin:20px 0 26px}.title-dot{color:#d18d53}.hero{display:flex;gap:16px;align-items:center;border-radius:23px;background:var(--soft);padding:24px 18px}.hero h2{margin:0 0 7px}.hero-icon{font-size:38px}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:18px 0 25px}.category-grid a{display:flex;flex-direction:column;gap:7px;background:white;border:1px solid var(--border);border-radius:17px;padding:14px 9px;text-decoration:none;color:var(--ink)}.category-grid span{font-size:25px}.category-grid strong{font-size:12px}.category-grid small{font-size:11px;color:var(--muted)}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:16px 0}.section-heading h2{margin:0}.search{display:flex;align-items:center;gap:9px;background:white;border:1px solid var(--border);border-radius:14px;padding:9px 13px;margin:14px 0}.search input{border:0;background:none;outline:0;width:100%;min-width:0;font-size:14px}.muted{font-size:12px;margin:10px 0 15px}.card{background:white;border:1px solid var(--border);border-radius:20px;padding:21px 18px;margin-bottom:14px}.episode-card{display:flex;align-items:flex-start;gap:14px;position:relative}.episode-card .icon{font-size:31px;flex-shrink:0}.episode-card .body{flex:1;min-width:0}.episode-card a{text-decoration:none;color:var(--ink)}.episode-card a:hover{color:var(--green)}.episode-card p{font-size:12px}.episode-card .remove{margin-top:12px}.pill{display:inline-block;padding:3px 9px;border-radius:20px;background:#f7efd9;font-size:11px;color:#8e702e}.meta{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}.back{font-size:13px;text-decoration:none}.empty{text-align:center;background:white;border-radius:20px;padding:38px 20px}.empty>span{font-size:40px}.empty a{margin-top:16px}.bottom-nav{position:fixed;z-index:5;bottom:0;left:50%;transform:translateX(-50%);width:min(100%,560px);display:flex;justify-content:space-around;background:#fffdf7f5;backdrop-filter:blur(10px);border-top:1px solid var(--border);padding:10px 8px calc(10px + env(safe-area-inset-bottom))}.bottom-nav a{display:flex;gap:4px;flex-direction:column;text-align:center;text-decoration:none;color:#8d9685;font-size:21px;min-width:65px}.bottom-nav span{font-size:11px}.bottom-nav [aria-current=page]{color:var(--green);font-weight:bold}.notice{position:fixed;z-index:9;left:50%;bottom:90px;transform:translateX(-50%);max-width:85%;padding:10px 16px;background:#344733;color:white;border-radius:13px;font-size:13px;display:none}.notice.visible{display:block}footer{text-align:center;color:#929787;font-size:11px;margin:30px 0}.episode-header h1{font-size:25px}.episode-header button{margin-top:5px}#favorite[aria-pressed=true]{background:#ffedc5;color:#906b22}.player{border:1px solid var(--border);border-radius:23px;overflow:hidden;background:white}.scene-top{display:flex;justify-content:space-between;padding:13px 17px;font-size:12px;color:#6a7f5b}.stage{position:relative;background:linear-gradient(#d9ebf4,#eff5e5)}.stage-food{background:linear-gradient(#ffe8c7,#fff6df)}.stage-travel{background:linear-gradient(#dfe5f4,#f1edf5)}.stage svg{display:block;width:100%;height:auto}.stage-badge{position:absolute;bottom:5px;right:10px;font-size:9px;color:#727e79}.scene-caption{padding:11px 16px;font-size:13px;background:#f4f7ef;color:#526a45;min-height:43px}.experiment{padding:14px 16px 4px;display:grid;gap:6px}.experiment label{font-size:12px;color:#5a714a}.experiment input{width:100%;accent-color:var(--green)}.experiment output{font-size:11px;color:var(--muted);min-height:20px}.scene-tabs{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;padding:13px}.scene-tabs button{padding:7px 0;border-radius:8px;font-size:11px;background:#f0f2eb;color:#7d8778}.scene-tabs button[aria-current=true]{background:var(--green);color:white}.narration{padding:5px 18px 16px;min-height:135px}.narration strong{font-size:12px;color:var(--green)}.narration p{font-size:15px;color:var(--ink);line-height:1.85;margin-top:6px}.play-controls{display:flex;gap:8px;flex-wrap:wrap;padding:0 16px}.mode-select{margin-left:auto;display:flex;align-items:center}.mode-select select{max-width:120px;font-size:12px;padding:9px;border:1px solid var(--border);border-radius:9px;background:#fff}.status{font-size:11px;padding:12px 16px;min-height:45px}.knowledge{margin-top:22px}.knowledge ul{padding-left:19px;font-size:13px;color:#64705d}.knowledge li{margin:9px 0}.knowledge details{font-size:12px}.knowledge details p{margin-top:9px;font-size:12px}.quiz .section-heading{margin:0 0 18px}.quiz .eyebrow{font-size:11px}.question{border:0;margin:0 0 22px;padding:0;min-width:0}.question legend{font-size:15px;font-weight:bold;margin-bottom:13px;line-height:1.7}.question-number{display:inline-flex;justify-content:center;align-items:center;background:var(--soft);color:var(--green);border-radius:8px;width:25px;height:25px;font-size:12px;margin-right:8px}.answer-option{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--border);background:#fafbf6;border-radius:12px;padding:11px;margin-bottom:8px;font-size:13px;cursor:pointer}.answer-option input{margin-top:5px;accent-color:var(--green);flex-shrink:0}.answer-option:has(input:checked){background:#eaf1df;border-color:#91a67c}.feedback{font-size:12px;line-height:1.8}.feedback.correct{color:#4e793d}.feedback.wrong{color:#ac6a35}.quiz-controls{display:flex;gap:10px}#quiz-score{margin-top:15px;color:var(--green);font-size:14px}.next-link{display:block;text-align:center;text-decoration:none;margin-top:18px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:380px){.app{padding-left:14px;padding-right:14px}.category-grid strong{font-size:11px}.play-controls button{padding:9px 12px}.mode-select select{max-width:105px}.narration{min-height:150px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

:root{--green:#526d60;--soft:#e7eee3;--paper:#fffaf0;--ink:#2f403c}
.hero{background:linear-gradient(125deg,#e4eddf,#f1e8d5);border:1px solid #dce4d4}.hero h2{font-size:22px;letter-spacing:-.5px}
.player{box-shadow:0 12px 32px #5a60450a;border-color:#e4e6d9}.stage,.stage svg{background:#e4eee8}
.view-switch{display:flex;gap:6px;padding:12px 15px 0}.view-switch button{flex:1;background:#f1f3ed;color:#7c8778;font-size:12px;padding:9px 12px}.view-switch button[aria-pressed=true]{background:#dfe9db;color:#405d4d;font-weight:bold}
.scene-top{background:#fffdf8;font-weight:bold}.scene-caption{background:#f0f3e9;font-size:13px;line-height:1.8}.stage-badge{font-size:8px;background:#fff9;padding:2px 6px;border-radius:7px}

/* 精修版：更清楚的阅读层次与大画面 */
body{background:#e9ece4}.app{background:#fbf8ef}.episode-header{margin-top:23px}.episode-header h1{font-size:26px;letter-spacing:-.7px;line-height:1.6}
.player{border:1px solid #dce4d8;border-radius:25px;box-shadow:0 12px 35px #4358440b}.scene-top{padding:14px 18px;color:#607762;font-size:12px}.scene-caption{padding:13px 18px;background:#eff2e5;color:#58714e}
.narration{padding:10px 20px 20px;min-height:152px}.narration p{line-height:1.95;font-size:15px}.scene-tabs{padding:14px 17px;gap:6px}.scene-tabs button{font-size:11px;padding:9px 0}
.experiment{padding:14px 20px 5px}.experiment input{height:24px}.experiment output{line-height:1.8}.view-switch{padding:14px 17px 0}.play-controls{padding:0 18px;gap:8px}.play-controls button{font-size:12px;padding:10px 12px}.mode-select select{font-size:12px}.status{line-height:1.8;padding:13px 19px}
.stage{border-top:1px solid #d8e4db;border-bottom:1px solid #d8e4db}.card{box-shadow:0 5px 18px #43584404}.answer-option{padding:13px}.knowledge li{line-height:1.95}
.player-expanded{overflow:hidden}.expanded-player{position:fixed;z-index:30;inset:14px;margin:auto;width:min(1050px,calc(100vw - 28px));height:calc(100dvh - 28px);overflow:auto;background:#fffdf6;box-shadow:0 0 0 100vmax #243b32b8;border-radius:20px}.expanded-player .stage svg{max-height:56dvh;width:100%}.expanded-player .narration{min-height:0}.expanded-player .experiment{max-width:760px;margin:auto}.expanded-player .scene-tabs{max-width:760px;margin:auto}.expanded-player .play-controls{padding-bottom:8px;position:sticky;bottom:0;background:#fffdf6f5;backdrop-filter:blur(10px);padding-top:8px}
@media(max-width:400px){.episode-header h1{font-size:24px}.play-controls button{font-size:11px;padding:10px}.mode-select{margin-left:0}.scene-tabs{gap:4px}.scene-tabs button{font-size:10px}.expanded-player{inset:6px;width:calc(100vw - 12px);height:calc(100dvh - 12px)}}