#pictureBooksApp{position:fixed;inset:0;z-index:100;background:#f8f2ff;color:#3a3845;font-family:"PingFang SC","Hiragino Sans","Yu Gothic","Microsoft YaHei",sans-serif;user-select:none}
#pictureBooksApp[hidden]{display:none!important}
.books-screen{position:absolute;inset:0;overflow:hidden}
.books-library{overflow-y:auto;background:linear-gradient(155deg,#e9f7ff 0%,#fff4dd 50%,#f4eaff 100%);padding:calc(18px + env(safe-area-inset-top)) 18px calc(34px + env(safe-area-inset-bottom))}
.books-head{position:relative;max-width:1180px;min-height:52px;margin:0 auto 18px;display:flex;align-items:center;gap:14px}
.books-home,.reader-back,.reader-sound,.reader-mic,.page-arrow{border:0;background:#fff;box-shadow:0 7px 22px rgba(58,56,69,.2);display:flex;align-items:center;justify-content:center;color:#3a3845}
.books-home{width:48px;height:48px;border-radius:50%;font-size:23px;flex:0 0 auto}
.books-title{font-weight:900;font-size:clamp(24px,5vw,38px);letter-spacing:.05em}
.books-tabs{margin-left:auto;display:flex;padding:5px;border-radius:22px;background:rgba(255,255,255,.72);box-shadow:0 7px 22px rgba(58,56,69,.13)}
.books-tab{min-width:92px;padding:10px 18px;border:0;border-radius:17px;background:transparent;color:#686174;font-size:17px;font-weight:900;white-space:nowrap}
.books-tab.active{background:#fff;color:#5d43b5;box-shadow:0 4px 12px rgba(69,46,124,.16)}
.books-cloud{font-size:28px;animation:bookFloat 2s ease-in-out infinite}
@keyframes bookFloat{50%{transform:translateY(-7px)}}
.book-groups{max-width:1180px;margin:0 auto;display:flex;flex-direction:column;gap:24px}
.book-group{background:rgba(255,255,255,.68);border:2px solid rgba(255,255,255,.85);border-radius:27px;padding:17px 16px 20px;box-shadow:0 12px 30px rgba(58,56,69,.1)}
.group-title{font-size:20px;font-weight:900;margin:0 4px 13px;display:flex;align-items:center;gap:8px}
.book-row{display:flex;gap:16px;overflow-x:auto;padding:3px 4px 6px;scroll-snap-type:x mandatory;overscroll-behavior-inline:contain;scrollbar-width:none;-ms-overflow-style:none;touch-action:auto;cursor:grab}
.book-row::-webkit-scrollbar{display:none;width:0;height:0}
.book-row.dragging{cursor:grabbing;scroll-snap-type:none}
.book-card{position:relative;flex:0 0 clamp(153px,45vw,220px);scroll-snap-align:start;background:#fff;border:0;border-radius:22px;padding:0;overflow:hidden;box-shadow:0 7px 20px rgba(58,56,69,.16);text-align:left;transition:transform .15s;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.book-card:active{transform:scale(.97)}
.book-cover-wrap{position:relative;aspect-ratio:3/2;background:#e7dff3;overflow:hidden}
.book-card.cloud .book-cover-wrap{aspect-ratio:4/5}
.book-cover{width:100%;height:100%;object-fit:cover;display:block}
.book-cover-title{position:absolute;left:10px;right:10px;bottom:10px;background:rgba(255,255,255,.9);border-radius:13px;padding:8px 10px;text-align:center;font-size:16px;font-weight:900;line-height:1.25;box-shadow:0 3px 10px rgba(0,0,0,.12)}
.book-complete-badge{position:absolute;right:9px;top:9px;padding:7px 10px;border-radius:15px;background:#fff3b4;color:#9a5b00;font-size:14px;font-weight:900;box-shadow:0 4px 12px rgba(0,0,0,.18)}
.books-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;background:linear-gradient(155deg,#e9f7ff,#f7edff);font-size:19px;font-weight:900;text-align:center;padding:24px}
.loading-book{font-size:76px;animation:bookPulse .9s ease-in-out infinite alternate}
@keyframes bookPulse{to{transform:scale(1.13) rotate(3deg)}}
.loading-bar{width:min(72vw,360px);height:13px;border-radius:20px;background:#fff;overflow:hidden;box-shadow:inset 0 2px 6px rgba(58,56,69,.13)}
.loading-fill{height:100%;width:10%;border-radius:inherit;background:linear-gradient(90deg,#7fc8f8,#b99af7,#ff8ba7);transition:width .18s}
.loading-retry{padding:12px 20px;border-radius:18px;background:#fff;font-size:16px;font-weight:900;box-shadow:0 6px 18px rgba(58,56,69,.16)}
.books-empty{padding:42px 20px;text-align:center;font-size:19px;font-weight:900;color:#716a7c}

.book-reader{background:#242331;color:#fff}
.reader-stage{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:10px max(72px,env(safe-area-inset-right)) 10px max(72px,env(safe-area-inset-left))}
.page-frame{position:relative;height:min(95vh,calc(100vw * .64));max-height:95vh;aspect-ratio:3/2;max-width:calc(100vw - 150px);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 16px 46px rgba(0,0,0,.45)}
.page-art{width:100%;height:100%;display:block;object-fit:cover}
.story-line{position:absolute;left:4%;right:4%;bottom:3.5%;min-height:16%;display:flex;align-items:center;justify-content:center;padding:8px 16px;border:4px solid rgba(255,255,255,.95);border-radius:20px;background:rgba(255,255,255,.9);color:#332f3c;text-align:center;font-weight:900;font-size:clamp(20px,4.1vh,40px);line-height:1.15;letter-spacing:.035em;text-shadow:0 1px #fff;box-shadow:0 4px 16px rgba(0,0,0,.2);white-space:pre-wrap}
.karaoke-kana{color:#332f3c}
.karaoke-kana.sung{color:#f24f77}
.reader-back,.reader-sound{position:absolute;z-index:4;top:max(12px,env(safe-area-inset-top));width:48px;height:48px;border-radius:50%;font-size:22px}
.reader-back{left:max(12px,env(safe-area-inset-left))}.reader-sound{right:max(12px,env(safe-area-inset-right));font-size:24px}
.page-arrow{position:absolute;z-index:3;top:50%;transform:translateY(-50%);width:54px;height:76px;border-radius:26px;font-size:40px;font-weight:900}
.page-arrow.prev{left:max(8px,env(safe-area-inset-left))}.page-arrow.next{right:max(8px,env(safe-area-inset-right))}
.page-arrow:disabled{opacity:.22}
.reader-bottom{position:absolute;z-index:14;right:max(14px,env(safe-area-inset-right));bottom:max(10px,env(safe-area-inset-bottom));display:flex;flex-direction:column-reverse;align-items:center;gap:8px}
.reader-mic{width:84px;height:84px;min-width:84px;min-height:84px;border-radius:50%;font-size:40px;background:#ff8ba7;color:#fff;border:5px solid rgba(255,255,255,.95);box-shadow:0 9px 28px rgba(0,0,0,.32),0 0 0 5px rgba(255,139,167,.22);touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.reader-mic.listening{animation:micBeat .58s ease-in-out infinite alternate;background:#f04467}
.reader-mic.processing{animation:none;background:#7f71dd;font-size:32px}
@keyframes micBeat{to{transform:scale(1.16);box-shadow:0 0 0 14px rgba(255,139,167,.2)}}
.page-stars{box-sizing:border-box;width:84px;min-width:84px;padding:7px 4px;border-radius:18px;background:rgba(24,23,34,.72);font-size:20px;letter-spacing:1px;text-align:center;color:#ffd33d;text-shadow:0 2px 5px #000}
.listening-panel{position:absolute;inset:0;z-index:12;display:flex;align-items:center;justify-content:center;background:rgba(21,20,35,.25);opacity:0;visibility:hidden;transition:opacity .16s;pointer-events:none}
.listening-panel.show{opacity:1;visibility:visible}
.wave-card{width:min(64vw,430px);padding:22px 25px 18px;border:5px solid rgba(255,255,255,.95);border-radius:31px;background:rgba(42,39,66,.9);box-shadow:0 16px 45px rgba(0,0,0,.38);text-align:center}
.sound-wave{height:88px;display:flex;align-items:center;justify-content:center;gap:9px}
.wave-bar{width:12px;height:64px;border-radius:12px;background:#70e1c1;transform:scaleY(.22);transform-origin:center;transition:transform .07s linear;box-shadow:0 0 12px rgba(112,225,193,.45)}
.listening-panel.show:not(.meter-live) .wave-bar{animation:idleWave .8s ease-in-out infinite alternate;animation-delay:var(--wave-delay)}
.listening-panel.finishing .wave-bar{animation:none!important;transform:scaleY(.18)!important;background:#b9b0ff}
.live-transcript{min-height:32px;margin-top:8px;color:#fff;font-size:clamp(16px,3.5vw,23px);font-weight:900;line-height:1.35;word-break:break-all;text-shadow:0 2px 5px #111}
@keyframes idleWave{from{transform:scaleY(.18)}to{transform:scaleY(.55)}}
.score-burst{position:absolute;inset:0;z-index:18;display:flex;align-items:center;justify-content:center;overflow:hidden;pointer-events:none}
.score-burst-card{position:relative;z-index:2;width:min(82vw,760px);padding:clamp(22px,4vh,38px) clamp(34px,6vw,72px) clamp(26px,5vh,44px);border:8px solid #fff;border-radius:40px;background:#ffeff5;box-shadow:0 22px 70px rgba(0,0,0,.48);text-align:center;animation:scoreBurst 1.65s cubic-bezier(.18,1.35,.35,1) forwards}
.score-burst-stars{color:#ffd42a;font-size:clamp(112px,18vw,190px);font-weight:900;letter-spacing:.01em;line-height:.82;text-shadow:0 7px 0 #f39b18,0 12px 22px rgba(64,36,0,.35)}
.score-burst-word{margin-top:clamp(12px,2.5vh,24px);color:#f04467;font-size:clamp(36px,7vw,72px);font-weight:900;line-height:1.15;text-shadow:0 3px #fff}
.score-spark{position:absolute;left:50%;top:50%;z-index:1;font-size:clamp(25px,5vw,54px);opacity:0;animation:scoreSpark 1.35s ease-out var(--delay) forwards}
.encouragement{position:absolute;inset:0;z-index:19;display:flex;align-items:center;justify-content:center;padding:28px;background:rgba(16,47,48,.34);pointer-events:none}
.encouragement-card{width:min(84vw,760px);padding:clamp(24px,5vh,46px) clamp(36px,7vw,78px);border:8px solid #fff;border-radius:40px;background:#fff8e8;color:#173b3a;box-shadow:0 22px 70px rgba(0,0,0,.42);font-size:clamp(36px,7vw,72px);font-weight:900;line-height:1.2;text-align:center;animation:encouragementPop .34s cubic-bezier(.2,1.4,.4,1)}
@keyframes encouragementPop{from{opacity:0;transform:scale(.72)}to{opacity:1;transform:scale(1)}}
@keyframes scoreBurst{0%{opacity:0;transform:scale(.04) rotate(-18deg)}24%{opacity:1;transform:scale(1.28) rotate(6deg)}43%{transform:scale(.9) rotate(-3deg)}60%{transform:scale(1.1) rotate(2deg)}78%{opacity:1;transform:scale(1) rotate(0)}100%{opacity:0;transform:scale(1.42) rotate(0)}}
@keyframes scoreSpark{0%{opacity:0;transform:translate(-50%,-50%) scale(.1) rotate(0)}17%{opacity:1}100%{opacity:0;transform:translate(calc(-50% + var(--x)),calc(-50% + var(--y))) scale(.45) rotate(520deg)}}
.page-count{position:absolute;z-index:4;right:max(14px,env(safe-area-inset-right));bottom:calc(max(10px,env(safe-area-inset-bottom)) + 145px);padding:6px 10px;border-radius:14px;background:rgba(20,19,29,.65);font-weight:800;font-size:14px}
.reader-status{position:absolute;z-index:5;top:max(14px,env(safe-area-inset-top));left:50%;transform:translateX(-50%);max-width:55vw;border-radius:20px;background:rgba(20,19,29,.75);padding:8px 15px;text-align:center;font-size:15px;font-weight:800;opacity:0;transition:opacity .2s;pointer-events:none}
.reader-status.show{opacity:1}
.reader-status.feedback{z-index:19;top:50%;transform:translate(-50%,-50%);width:max-content;max-width:min(84vw,760px);padding:clamp(22px,4vh,38px) clamp(34px,6vw,72px);border:8px solid #fff;border-radius:40px;background:linear-gradient(145deg,#fff8d9,#ffeff5);box-shadow:0 22px 70px rgba(0,0,0,.48);color:#f04467;font-size:clamp(34px,7vw,72px);font-weight:900;line-height:1.18;text-shadow:0 3px #fff}
.reader-status.feedback.show{animation:readerFeedback var(--feedback-duration,1700ms) cubic-bezier(.18,1.35,.35,1) both}
@keyframes readerFeedback{0%{opacity:0;transform:translate(-50%,-50%) scale(.08) rotate(-10deg)}24%{opacity:1;transform:translate(-50%,-50%) scale(1.18) rotate(3deg)}45%,82%{opacity:1;transform:translate(-50%,-50%) scale(1) rotate(0)}100%{opacity:0;transform:translate(-50%,-50%) scale(1.16)}}
.quiz-frame{box-sizing:border-box;width:min(82vw,860px);height:min(92vh,610px);padding:20px;border-radius:25px;background:linear-gradient(150deg,#fff8d9,#f2e9ff);box-shadow:0 16px 46px rgba(0,0,0,.45);color:#332f3c;overflow:auto}
.quiz-question{margin:0 0 15px;text-align:center;font-size:clamp(22px,4vh,36px);font-weight:900}
.quiz-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}
.quiz-option{position:relative;padding:0 0 9px;border:4px solid #fff;border-radius:18px;background:#fff;color:#332f3c;overflow:hidden;box-shadow:0 7px 18px rgba(58,56,69,.15)}
.quiz-answer{display:block;width:100%;padding:0;border:0;background:transparent;cursor:pointer}
.quiz-answer img{width:100%;aspect-ratio:2/3;display:block;object-fit:cover}
.quiz-option-sound{display:block;width:52px;height:42px;margin:7px auto 0;border:0;border-radius:15px;background:#eee7ff;color:#4d3a78;font-size:24px;line-height:1;box-shadow:0 3px 9px rgba(58,56,69,.16)}
.quiz-option-sound:active{transform:scale(.94)}
.quiz-option.correct{border-color:#4dc79a;background:#e4fff2}.quiz-option.wrong{border-color:#ff8ba7;background:#fff0f4}
.quiz-answer:disabled{opacity:.82;cursor:default}
.quiz-reader{background:linear-gradient(150deg,#fff8d9,#f2e9ff)}
.quiz-reader .reader-stage{padding:0;background:transparent}
.quiz-reader .quiz-frame{width:100vw;height:100vh;padding:clamp(18px,4vh,42px) max(72px,calc(22px + env(safe-area-inset-right))) clamp(18px,4vh,42px) max(72px,calc(22px + env(safe-area-inset-left)));border-radius:0;box-shadow:none;display:flex;flex-direction:column;align-items:center;justify-content:center}
.quiz-reader .quiz-options{width:min(92vw,960px);grid-template-columns:repeat(auto-fit,minmax(140px,220px));justify-content:center}
.rotate-notice{display:none;position:absolute;inset:0;z-index:10;align-items:center;justify-content:center;flex-direction:column;gap:18px;padding:30px;background:linear-gradient(160deg,#dff4ff,#f5e8ff);color:#3a3845;text-align:center;font-weight:900;font-size:23px}
.rotate-phone{font-size:84px;animation:rotatePhone 1.7s ease-in-out infinite}
@keyframes rotatePhone{50%{transform:rotate(90deg)}}
.celebrate{position:absolute;inset:0;z-index:30;display:flex;align-items:center;justify-content:center;overflow:hidden;background:radial-gradient(circle,rgba(255,255,255,.6),rgba(126,217,180,.82));pointer-events:auto;touch-action:none}
.celebrate-card{position:relative;z-index:2;border:8px solid #fff;border-radius:36px;padding:22px 38px;background:linear-gradient(140deg,#ffdf65,#ff8ba7,#b99af7);box-shadow:0 20px 55px rgba(0,0,0,.33);text-align:center;animation:celebratePop .65s cubic-bezier(.2,1.5,.4,1)}
.celebrate-face{font-size:92px}.celebrate-text{font-size:clamp(28px,7vw,54px);font-weight:900;text-shadow:0 3px #fff;color:#4a315d}
@keyframes celebratePop{from{transform:scale(.1) rotate(-12deg)}to{transform:scale(1) rotate(0)}}
.confetti{position:absolute;top:-15%;font-size:clamp(18px,4vw,38px);animation:confettiFall var(--duration) linear var(--delay) forwards}
@keyframes confettiFall{to{transform:translate(var(--drift),125vh) rotate(800deg)}}

@media (orientation:portrait){.book-reader .reader-stage,.book-reader>.reader-back,.book-reader>.reader-sound,.book-reader>.page-arrow,.book-reader>.reader-bottom,.book-reader>.page-count,.book-reader>.reader-status,.book-reader>.listening-panel{display:none}.book-reader .rotate-notice{display:flex}}
@media (orientation:landscape){.book-reader .rotate-notice{display:none}}
@media (orientation:landscape) and (max-height:500px){.page-frame{height:96vh}.story-line{font-size:clamp(18px,5.5vh,31px);border-width:3px}.reader-bottom{right:max(4px,env(safe-area-inset-right));bottom:4px;gap:5px}.reader-mic{width:72px;height:72px;min-width:72px;min-height:72px;font-size:35px}.reader-mic.processing{font-size:28px}.page-stars{width:72px;min-width:72px;padding:5px 2px;font-size:17px;letter-spacing:0}.page-count{right:max(4px,env(safe-area-inset-right));bottom:123px;padding:5px 8px;font-size:13px}.quiz-frame{height:96vh;padding:10px}.quiz-question{margin-bottom:8px;font-size:21px}.quiz-options{gap:8px}.quiz-option{border-width:3px}}
@media (min-width:760px){.book-card{flex-basis:207px}.book-group{padding:21px 22px 24px}}
@media (max-width:700px){.books-title{font-size:0}.books-title::after{content:'绘本';font-size:23px}.books-tab{min-width:0;padding:9px 8px;font-size:15px}.books-cloud{display:none}}
@media (prefers-reduced-motion:reduce){#pictureBooksApp *{animation:none!important;scroll-behavior:auto!important}}

/* Japanese Read Aloud App visual system */
#pictureBooksApp{background:#fff8e8;color:#173b3a;font-family:"Avenir Next","Hiragino Sans","Noto Sans JP","PingFang SC","Microsoft YaHei",sans-serif}
.books-library{background:radial-gradient(circle at 90% 5%,rgba(244,201,93,.12) 0 16vw,transparent 16.2vw),radial-gradient(circle at 7% 72%,rgba(243,107,91,.07) 0 12vw,transparent 12.2vw),linear-gradient(145deg,#fff9e9,#eaf4e7 55%,#fff0dd);padding:calc(74px + env(safe-area-inset-top)) 0 calc(28px + env(safe-area-inset-bottom))}
.books-head{position:fixed;z-index:8;top:0;left:0;right:0;max-width:none;height:calc(66px + env(safe-area-inset-top));min-height:0;margin:0;padding:calc(10px + env(safe-area-inset-top)) 24px 8px;pointer-events:none}
.books-home{pointer-events:auto;width:44px;height:44px;border-radius:50%;font-size:27px;font-weight:800;color:#173b3a;background:rgba(255,255,255,.92);box-shadow:0 7px 18px rgba(23,59,58,.18)}
.books-tabs{pointer-events:auto;position:absolute;left:50%;top:calc(10px + env(safe-area-inset-top));transform:translateX(-50%);margin:0;padding:4px;border-radius:24px;background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.85);box-shadow:0 7px 18px rgba(23,59,58,.14);backdrop-filter:blur(14px)}
.books-tab{min-width:104px;padding:9px 20px;border-radius:19px;color:#617270;font-size:17px}
.books-tab.active{background:#0f7773;color:#fff;box-shadow:0 4px 11px rgba(15,119,115,.28)}
.books-title,.books-cloud{display:none}
.book-groups{max-width:none;margin:0;gap:0}
.book-group{padding:18px 0 7px;background:transparent;border:0;border-radius:0;box-shadow:none}
.group-title{margin:0 34px 13px;color:#173b3a;font-size:21px;gap:10px}
.group-mark{width:7px;height:22px;border-radius:20px;background:#0f7773;flex:0 0 auto}
.book-group:first-child .group-mark{background:#f36b5b}
.book-row{height:239px;gap:18px;padding:0 34px 7px}
.book-card{flex:0 0 158px;width:158px;height:232px;padding:0;background:transparent;border-radius:0;overflow:visible;box-shadow:none;text-align:center;display:flex;flex-direction:column;gap:7px}
.book-card:active{transform:scale(.97)}
.book-cover-wrap,.book-card.cloud .book-cover-wrap{position:relative;width:158px;height:198px;aspect-ratio:auto;border-radius:18px;background:linear-gradient(145deg,#ddeee5,#fff0dd);border:2px solid rgba(255,255,255,.82);box-shadow:0 8px 15px rgba(23,59,58,.16);overflow:hidden}
.book-cover{object-fit:cover}
.book-card.legacy .book-cover-wrap::before{content:"";position:absolute;inset:-14px;background:var(--cover-url) center/cover no-repeat;filter:blur(12px);opacity:.38;transform:scale(1.12)}
.book-card.legacy .book-cover{position:relative;z-index:1;object-fit:contain;background:rgba(255,253,247,.42)}
.book-cover-title{display:none}
.book-card-title{height:20px;overflow:hidden;color:#173b3a;font-size:16px;font-weight:800;line-height:20px;text-overflow:ellipsis;white-space:nowrap}
.book-complete-badge{right:9px;top:9px;width:36px;height:36px;padding:0;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,.95);border:2px solid #2c9a68;color:#2c9a68;font-size:20px;box-shadow:0 3px 8px rgba(0,0,0,.2)}
.books-loading{background:linear-gradient(145deg,#fff9e9,#eaf4e7 58%,#fff0dd);color:#173b3a}
.loading-book{color:#0f7773}.loading-bar{background:#ddeee5}.loading-fill{background:#0f7773}.loading-retry{color:#173b3a}

.book-mode{background:#173b3a;color:#fff}
.mode-backdrop{position:absolute;inset:-9%;width:118%;height:118%;object-fit:cover;filter:blur(22px);opacity:.38;transform:scale(1.06)}
.mode-shade{position:absolute;inset:0;background:rgba(0,0,0,.52)}
.mode-back{position:absolute;z-index:3;left:max(28px,env(safe-area-inset-left));top:calc(22px + env(safe-area-inset-top));width:48px;height:48px;border:0;border-radius:50%;background:rgba(255,255,255,.92);color:#173b3a;font-size:29px;box-shadow:0 5px 16px rgba(0,0,0,.28)}
.mode-layout{position:absolute;inset:0;display:flex;align-items:stretch;padding:calc(22px + env(safe-area-inset-top)) max(38px,env(safe-area-inset-right)) calc(24px + env(safe-area-inset-bottom)) max(104px,calc(28px + env(safe-area-inset-left)));gap:42px}
.mode-cover-column{flex:5;display:flex;align-items:center;justify-content:center;min-width:0}
.mode-cover{height:min(76vh,520px);max-width:100%;aspect-ratio:.78;object-fit:cover;border:2px solid rgba(255,255,255,.8);border-radius:18px;box-shadow:0 18px 42px rgba(0,0,0,.42)}
.mode-info{flex:7;min-width:0;display:flex;flex-direction:column;align-items:flex-start;padding:18px 0 8px}
.mode-title{max-width:620px;font-size:clamp(27px,4vw,38px);line-height:1.18;font-weight:900;text-shadow:0 3px 13px rgba(0,0,0,.35)}
.mode-age{margin-top:13px;padding:9px 17px;border:1px solid rgba(255,255,255,.28);border-radius:22px;background:rgba(255,255,255,.16);font-size:16px;font-weight:800}
.mode-actions{width:min(100%,420px);margin:auto 0;display:flex;flex-direction:column;gap:18px}
.mode-button{width:100%;height:100px;padding:0 25px;display:flex;align-items:center;gap:20px;border:0;border-radius:28px;background:#f4c95d;color:#173b3a;box-shadow:0 8px 18px rgba(0,0,0,.24);font-size:25px;font-weight:900;text-align:left}
.mode-button.read{background:#f36b5b}
.mode-button.recommended{box-shadow:0 0 0 4px #fff,0 0 34px 8px rgba(255,255,255,.55);animation:modePulse .85s ease-in-out infinite alternate}
.mode-button-badge{margin-right:10px;padding:5px 11px;border-radius:12px;background:#fff;color:#075955;font-size:15px;font-weight:900}
@keyframes modePulse{from{transform:scale(.98)}to{transform:scale(1.025)}}
.mode-hint{margin-top:14px;max-width:420px;font-size:18px;font-weight:800;line-height:1.35;opacity:.92}
.book-mode-chip{position:absolute;z-index:2;left:8px;bottom:8px;padding:4px 9px;border-radius:12px;font-size:13px;font-weight:900;box-shadow:0 3px 8px rgba(0,0,0,.2)}
.book-mode-chip.listen{background:#f4c95d;color:#173b3a}.book-mode-chip.read{background:#f36b5b;color:#fff}
@media (prefers-reduced-motion:reduce){.mode-button.recommended,.quiz-option.narrated .quiz-option-speaking{animation:none}}.mode-button-icon{width:62px;height:62px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:rgba(255,255,255,.56);font-size:32px}.mode-button-label{flex:1}.mode-button-arrow{font-size:30px}

.book-reader{background:#102f30}
.reader-stage{padding:0;background:#102f30}
.page-frame{width:100%;height:100%;max-width:none;max-height:none;aspect-ratio:auto;border-radius:0;background:#102f30;box-shadow:none}
.page-art{object-fit:contain;animation:pageFade .42s ease-out}
@keyframes pageFade{from{opacity:.25}to{opacity:1}}
.page-frame::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(to bottom,rgba(0,0,0,.2),transparent 50%,rgba(0,0,0,.24))}
.story-line{z-index:2;left:120px;right:120px;bottom:max(22px,env(safe-area-inset-bottom));min-height:0;max-width:780px;margin:auto;padding:15px 28px;border:0;border-radius:25px;background:rgba(255,253,247,.94);color:#173b3a;font-size:clamp(24px,4vh,32px);line-height:1.25;letter-spacing:0;text-shadow:none;box-shadow:0 7px 18px rgba(0,0,0,.2)}
.karaoke-kana{color:#173b3a}.karaoke-kana.sung{color:#f36b5b}
.reader-back,.reader-sound{width:52px;height:52px;color:#173b3a;background:rgba(255,255,255,.92);box-shadow:0 5px 14px rgba(0,0,0,.3)}
.reader-back{left:max(18px,env(safe-area-inset-left));top:calc(14px + env(safe-area-inset-top));font-size:31px}.reader-sound{right:max(22px,env(safe-area-inset-right));top:auto;bottom:max(22px,env(safe-area-inset-bottom));width:74px;height:74px;font-size:34px;background:#f4c95d;color:#075955}
.page-arrow{width:58px;height:58px;border-radius:50%;font-size:42px;background:rgba(255,255,255,.92);color:#173b3a;box-shadow:0 5px 14px rgba(0,0,0,.3)}
.page-arrow.prev{left:max(18px,env(safe-area-inset-left))}.page-arrow.next{right:max(18px,env(safe-area-inset-right))}
.reader-bottom{left:max(22px,env(safe-area-inset-left));right:auto;bottom:max(22px,env(safe-area-inset-bottom));display:block}
.reader-mic{width:74px;height:74px;min-width:74px;min-height:74px;border:0;background:#fff;color:#f36b5b;font-size:35px;box-shadow:0 7px 18px rgba(0,0,0,.35)}
.reader-mic.listening{background:#f36b5b;color:#fff;box-shadow:0 0 0 8px rgba(255,255,255,.8),0 0 25px 14px rgba(243,107,91,.35)}
.page-stars{position:fixed;right:max(18px,env(safe-area-inset-right));top:calc(14px + env(safe-area-inset-top));width:auto;min-width:112px;padding:11px 14px;border-radius:22px;background:rgba(23,59,58,.84);font-size:23px}
.page-dots{position:absolute;z-index:4;top:calc(20px + env(safe-area-inset-top));left:100px;right:100px;display:flex;justify-content:center;gap:6px;pointer-events:none}
.page-dot{width:7px;height:7px;border-radius:10px;background:rgba(255,255,255,.38);transition:width .24s,background .24s}.page-dot.past{background:#fff}.page-dot.current{width:24px;background:#fff}
.page-count{display:none}
.wave-card{background:rgba(23,59,58,.93);border-color:rgba(255,255,255,.95)}.wave-bar{background:#7ed9b4}.reader-status{background:rgba(23,59,58,.82)}

.quiz-reader{background:#fff4d8}
.quiz-reader::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 18%,rgba(244,201,93,.22) 0 9%,transparent 9.3%),radial-gradient(circle at 86% 72%,rgba(126,217,180,.22) 0 12%,transparent 12.3%);pointer-events:none}
.quiz-reader .reader-back{background:#173b3a;color:#fff}
.quiz-reader .reader-sound{top:calc(18px + env(safe-area-inset-top));bottom:auto;width:52px;height:52px;background:#173b3a;color:#fff;font-size:27px}
.quiz-reader .quiz-frame{justify-content:flex-start;padding:calc(18px + env(safe-area-inset-top)) max(26px,env(safe-area-inset-right)) calc(22px + env(safe-area-inset-bottom)) max(26px,env(safe-area-inset-left));background:transparent;color:#173b3a;overflow:hidden}
.quiz-question{height:82px;max-width:calc(100vw - 220px);margin:0 auto 16px;display:flex;align-items:center;justify-content:center;font-size:clamp(26px,4.4vw,34px);line-height:1.15}
.quiz-reader .quiz-options{flex:1;width:100%;max-width:1180px;min-height:0;display:flex;grid-template-columns:none;gap:15px;align-items:stretch}
.quiz-option{flex:1;min-width:0;padding:0;border:2px solid #fff;border-radius:26px;background:rgba(255,255,255,.95);box-shadow:0 8px 18px rgba(23,59,58,.14)}
.quiz-answer{height:calc(100% - 70px)}.quiz-answer img{width:100%;height:100%;aspect-ratio:auto;object-fit:cover}
.quiz-option-sound{width:70px;height:70px;margin:0 auto;border-radius:50%;background:transparent;color:#075955;font-size:34px;box-shadow:none}
.quiz-option.correct{border-width:5px;border-color:#2e9f68;background:#fff}.quiz-option.wrong{border-width:5px;border-color:#e8483f;background:#fff;animation:quizShake .18s linear 2 alternate}
@keyframes quizShake{to{transform:translateX(7px)}}
.quiz-option{transition:border-color .2s,box-shadow .2s,transform .2s}
.quiz-answer{position:relative;overflow:hidden;border-radius:24px 24px 0 0}
.quiz-option-mask{position:absolute;inset:0;background:rgba(23,48,48,.65);opacity:0;transition:opacity .18s;pointer-events:none}
.quiz-options.narrating .quiz-option:not(.narrated) .quiz-option-mask{opacity:1}
.quiz-option-speaking{position:absolute;top:12px;right:12px;width:54px;height:54px;display:flex;align-items:center;justify-content:center;border:4px solid #fff;border-radius:50%;background:#f4c95d;color:#075955;font-size:27px;box-shadow:0 6px 14px rgba(23,59,58,.3);opacity:0;transform:scale(.6);transition:opacity .18s,transform .18s;pointer-events:none}
.quiz-option.narrated{border-color:#f4c95d;box-shadow:0 0 0 5px #f4c95d,0 10px 30px 4px rgba(244,201,93,.58);transform:translateY(-4px) scale(1.02)}
.quiz-option.narrated .quiz-option-speaking{opacity:1;transform:scale(1);animation:quizSpeaking .7s ease-in-out infinite alternate}
.quiz-option.narrated .quiz-option-sound{background:#f4c95d}
@keyframes quizSpeaking{to{transform:scale(1.12)}}
.quiz-option-sound{display:flex;align-items:center;justify-content:center;width:58px;height:58px;margin:6px auto;background:#e6f3ee;transition:background .2s}
.quiz-option.correct .quiz-option-mask,.quiz-options:has(.correct) .quiz-option:not(.correct) .quiz-option-mask{opacity:1}
.quiz-answer:disabled{opacity:1}
.celebrate{background:radial-gradient(circle,rgba(255,249,216,.96),rgba(126,217,180,.93))}.celebrate-card{border:0;background:transparent;box-shadow:none}.celebrate-text{color:#173b3a;text-shadow:0 3px #fff}
.audio-error-toast{position:fixed;left:50%;bottom:28px;z-index:40;transform:translateX(-50%);max-width:min(520px,calc(100vw - 40px));padding:13px 20px;border-radius:18px;background:rgba(23,59,58,.94);color:#fff;font-size:16px;font-weight:800;text-align:center;box-shadow:0 8px 24px rgba(0,0,0,.24)}

@media (max-width:700px){.books-tabs{left:74px;right:10px;transform:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.books-tab{min-width:0;padding:9px 6px;font-size:14px}.group-title{margin-left:20px;margin-right:20px}.book-row{padding-left:20px;padding-right:20px}.mode-layout{padding-left:82px;gap:24px}.mode-button{height:82px;font-size:21px}.mode-button-icon{width:50px;height:50px}.story-line{left:104px;right:104px}}
@media (orientation:portrait){.book-mode .mode-layout,.book-mode>.mode-back{display:none}.book-mode::after{content:"把设备转成横屏，就可以读绘本啦！";position:absolute;inset:0;z-index:6;display:flex;align-items:center;justify-content:center;padding:30px;background:linear-gradient(145deg,#fff9e9,#eaf4e7);color:#173b3a;text-align:center;font-size:23px;font-weight:900}.quiz-reader .quiz-frame{display:none}}