:root{--bg: #faf8f5;--card: #ffffff;--ink: #2c2c2c;--mid: #888;--light: #aaa;--border: #e8e4df;--seal: #c43a31;--jade: #3a7a5a;--gold: #c9a63b;--radius: 14px;--font-cn: "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--shadow: 0 4px 24px rgba(0, 0, 0, .06)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:var(--font-ui);color:var(--ink);background:var(--bg);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button{font-family:var(--font-ui);cursor:pointer;border:none;background:none;color:inherit;font-size:inherit}input{font-family:var(--font-ui)}.lang-select{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;padding:24px;text-align:center}.lang-select h1{font-family:var(--font-cn);font-size:36px;color:var(--seal);letter-spacing:4px;margin-bottom:8px}.lang-select .st{font-size:14px;color:var(--mid);margin-bottom:28px}.lang-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:900px;width:100%;margin-bottom:16px}.lang-card{background:var(--card);border:2px solid var(--border);border-radius:var(--radius);padding:16px 10px;text-align:center;cursor:pointer;transition:all .2s}.lang-card:hover{border-color:var(--seal);transform:translateY(-2px);box-shadow:var(--shadow)}.lang-card .flag{font-size:36px}.lang-card .ln{font-size:14px;font-weight:600;color:var(--ink);margin-top:6px}.lang-card .lv{font-size:12px;color:var(--mid)}.app-shell{display:none;min-height:100vh;flex-direction:column}.app-shell.active{display:flex}.top-bar{background:var(--card);padding:10px 16px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.top-bar .at{font-family:var(--font-cn);font-size:18px;font-weight:700;color:var(--seal);letter-spacing:2px}.bb{padding:6px 12px;border-radius:8px;font-size:13px;color:var(--seal);border:1px solid var(--seal);background:transparent;transition:all .2s}.bb:hover{background:#fdf2f0}.bottom-nav{display:flex;background:var(--card);border-top:1px solid var(--border);position:sticky;bottom:0;z-index:100}.ni{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0;font-size:11px;color:var(--mid);transition:color .2s}.ni.active{color:var(--seal)}.ni .nic{font-size:18px}.main-content{flex:1;padding:16px}.pron-section h2{font-family:var(--font-cn);font-size:20px;color:var(--seal);margin-bottom:12px}.gi{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;margin-bottom:20px}.gc{background:var(--card);border:2px solid var(--border);border-radius:10px;padding:14px;text-align:center;cursor:pointer;transition:all .2s}.gc:hover{border-color:var(--seal)}.gc.done{border-color:var(--jade);background:#edf7f1}.gc .gn{font-size:13px;color:var(--mid)}.gc .gl{font-size:15px;font-weight:600;color:var(--ink);margin:4px 0}.gc .gs{font-size:11px;color:var(--light)}.chars-row{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0;justify-content:center}.ch{width:48px;height:48px;display:flex;align-items:center;justify-content:center;font-size:24px;background:var(--card);border:2px solid var(--border);border-radius:8px;cursor:pointer;transition:all .2s}.ch:hover{border-color:var(--seal);transform:scale(1.05)}.ch .py{font-size:10px;color:var(--mid)}.exam-section{text-align:center}.exam-section .q-char{font-size:64px;font-family:var(--font-cn);margin:20px 0;color:var(--ink)}.exam-opts{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:400px;margin:0 auto}.eopt{padding:14px;border:2px solid var(--border);border-radius:12px;font-size:15px;cursor:pointer;transition:all .2s;background:var(--card)}.eopt:hover{border-color:var(--seal)}.eopt.correct{border-color:var(--jade);background:#edf7f1}.eopt.wrong{border-color:var(--seal);background:#fdf2f0}.char-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.char-card .big-char{font-size:80px;font-family:var(--font-cn);text-align:center;margin:12px 0;color:var(--ink)}.char-card .cp{font-size:16px;color:var(--seal);text-align:center;margin-bottom:12px}.char-card .cd{font-size:14px;color:var(--mid);text-align:center;margin-bottom:16px}.char-card .cwords{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin:12px 0}.cw{padding:4px 10px;background:#f5f0eb;border-radius:6px;font-size:13px}.counter{text-align:center;font-size:13px;color:var(--mid);margin:8px 0}.detail-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.detail-card h3{font-family:var(--font-cn);font-size:22px;color:var(--ink);text-align:center;margin-bottom:8px}.detail-card .det-p{font-size:15px;color:var(--seal);text-align:center;margin-bottom:12px}.detail-card .det-meta{font-size:12px;color:var(--mid);margin:6px 0}.detail-card .det-story{font-size:14px;line-height:1.8;color:var(--ink);margin:12px 0;padding:12px;background:#faf8f5;border-radius:8px}.detail-card .det-use{font-size:13px;color:var(--jade);margin:8px 0;font-style:italic}.detail-card .det-en{font-size:12px;color:var(--light);margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}.level-tags{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap;justify-content:center}.reader-area{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin:12px 0;font-size:15px;line-height:2}.reader-area h3{font-family:var(--font-cn);font-size:18px;color:var(--seal);margin-bottom:8px}.reader-area .rau{font-size:11px;color:var(--light);margin-bottom:10px}.reader-area .bi{color:var(--mid);margin-bottom:10px;padding-bottom:8px;border-bottom:1px dashed var(--border)}.reader-area .cn{color:var(--ink);font-size:16px;margin-bottom:10px}.reader-area .y{color:var(--jade);font-size:13px;margin-bottom:10px;font-style:italic}.reader-area .qz{font-size:14px;font-weight:600;color:var(--seal);margin-top:10px}.rbtn-row{display:flex;gap:8px;justify-content:center}.rel-tags{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap;justify-content:center}.rt{padding:8px 16px;border-radius:20px;font-size:13px;border:1px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s}.rt.active{background:var(--gold);color:#fff;border-color:var(--gold)}.chat-area{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin:12px 0;max-height:42vh;overflow-y:auto;display:flex;flex-direction:column;gap:10px}.cm{max-width:80%;padding:10px 14px;border-radius:14px;font-size:13px;line-height:1.6;animation:mi .3s ease-out}@keyframes mi{0%{opacity:0;transform:translateY(8px)}}.cm.part{background:#f5f0eb;align-self:flex-start;border-bottom-left-radius:4px}.cm.user{background:var(--seal);color:#fff;align-self:flex-end;border-bottom-right-radius:4px}.cm .mp{font-size:10px;opacity:.6;margin-top:2px}.chat-input{display:flex;gap:8px;margin:12px 0}.chat-input input{flex:1;padding:10px 14px;border:2px solid var(--border);border-radius:10px;font-size:14px;outline:none;transition:border-color .2s}.chat-input input:focus{border-color:var(--seal)}.chat-opts{display:flex;flex-wrap:wrap;gap:6px;justify-content:center}.co{padding:8px 14px;border-radius:16px;border:1px solid var(--border);background:var(--card);cursor:pointer;font-size:13px;transition:all .2s}.co:hover{border-color:var(--seal);background:#fdf2f0}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:200;display:flex;align-items:center;justify-content:center;padding:16px}.modal{background:var(--card);border-radius:var(--radius);padding:28px;max-width:480px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:0 20px 60px #0003}.modal h3{text-align:center;font-family:var(--font-cn);font-size:20px;margin-bottom:16px}.modal .ri{font-size:56px;text-align:center;margin:12px 0}.trial-bar{background:linear-gradient(90deg,#e8f5e9,#c8e6c9);border-bottom:1px solid #a5d6a7;padding:6px 16px;display:flex;align-items:center;justify-content:center;gap:10px;font-size:13px;color:#2e7d32;font-weight:500}.trial-bar.warning{background:linear-gradient(90deg,#fff3e0,#ffe0b2);border-bottom-color:#ffcc80;color:#e65100}.trial-bar.expired{background:linear-gradient(90deg,#ffebee,#ffcdd2);border-bottom-color:#ef9a9a;color:#c62828}.trial-bar .timer{font-family:monospace;font-size:15px;font-weight:700;min-width:55px;text-align:center}.paywall-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;z-index:300;display:flex;align-items:center;justify-content:center;padding:20px}.paywall{background:var(--card);border-radius:var(--radius);padding:32px 28px;max-width:520px;width:100%;max-height:85vh;overflow-y:auto;box-shadow:0 24px 80px #0000004d;text-align:center}.paywall h2{font-family:var(--font-cn);font-size:22px;color:var(--seal);margin-bottom:8px;letter-spacing:2px}.paywall .pw-sub{font-size:14px;color:var(--mid);margin-bottom:20px}.paywall .plan-cards{display:flex;gap:12px;margin:16px 0;flex-wrap:wrap;justify-content:center}.paywall .plan-card{flex:1;min-width:150px;border:2px solid var(--border);border-radius:12px;padding:20px 14px;text-align:center;transition:all .2s;cursor:pointer}.paywall .plan-card:hover,.plan-card.recommended{border-color:var(--gold);background:#fffdf5}.plan-card.recommended:before{content:"推荐";display:block;background:var(--gold);color:#fff;font-size:11px;padding:2px 10px;border-radius:10px;margin:-28px auto 10px;width:fit-content}.plan-card .pc-price{font-size:28px;font-weight:700;color:var(--seal);margin:6px 0}.plan-card .pc-desc{font-size:12px;color:var(--mid);margin:4px 0}.paywall .pw-actions{display:flex;flex-direction:column;gap:8px;margin:16px 0}.paywall .pw-note{font-size:11px;color:#999;margin-top:12px;line-height:1.5}.btn{padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:all .2s}.btn-primary{background:var(--seal);color:#fff}.btn-primary:hover{opacity:.9}.btn-outline{border:2px solid var(--seal);color:var(--seal);background:transparent}.btn-outline:hover{background:#fdf2f0}.btn-gold{background:var(--gold);color:#fff}.btn-gold:hover{opacity:.85}.btn-small{padding:6px 12px;font-size:12px}.detail-grid{display:grid;grid-template-columns:1fr;gap:12px;margin:16px 0}@media (max-width: 480px){.main-content{padding:10px}.char-card{padding:18px}.reader-area{padding:16px;font-size:14px}.lang-grid{grid-template-columns:repeat(2,1fr);gap:8px}.lang-card{padding:14px 10px}.gi{grid-template-columns:repeat(2,1fr)}.exam-opts{grid-template-columns:1fr}.chat-area{max-height:35vh}}@media (min-width: 481px) and (max-width: 768px){.lang-grid,.gi{grid-template-columns:repeat(3,1fr)}}@media (min-width: 769px){.lang-grid{grid-template-columns:repeat(7,1fr)}.lang-card{padding:24px 12px}.main-content{display:grid;grid-template-columns:1fr;gap:16px;padding:24px}.reader-area{font-size:17px;max-height:60vh}.char-card{max-width:500px;margin:0 auto}.chat-area{max-width:600px;margin:0 auto}.detail-grid{grid-template-columns:repeat(2,1fr)}}@media (min-width: 1024px){.lang-grid{grid-template-columns:repeat(7,1fr)}.main-content{max-width:960px;margin:0 auto}.gi{grid-template-columns:repeat(5,1fr)}}