.slide-wrap{background:#fff;border:1px solid #f0e8e4;border-radius:16px;overflow:hidden}.scene-area{height:300px;display:flex;align-items:center;justify-content:center;overflow:hidden}.scene-area svg{width:100%;height:100%}.slide-nav{display:flex;align-items:center;justify-content:space-between;margin-top:1.25rem}.dots{display:flex;gap:7px}.dot{width:9px;height:9px;border-radius:50%;background:#e0d8d4;cursor:pointer;transition:background .2s}.dot.active{background:#e8513a}.para-list{display:flex;flex-direction:column;gap:10px}.para-item{background:#fff;border:1px solid #f0e8e4;border-radius:12px;padding:1rem 1.25rem}.para-num{font-size:11px;color:#bbb;margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}.para-text{font-size:14px;line-height:1.8;color:#333}.hi-word{background:none;color:#e8513a;font-weight:600}.vocab-card{background:#fff;border:1px solid #f0e8e4;border-radius:14px;overflow:hidden;margin-bottom:1.5rem}.vocab-header{background:#fef3f0;padding:.75rem 1.25rem;font-size:14px;font-weight:600;color:#b03020;border-bottom:1px solid #f0e8e4}.vocab-row{display:flex;align-items:center;padding:.75rem 1.25rem;border-bottom:1px solid #f8f0ec;gap:16px}.vocab-row:last-child{border-bottom:none}.vocab-word{font-size:14px;font-weight:600;color:#e8513a;min-width:130px}.vocab-def{font-size:13px;color:#666}.quiz-section-title{font-size:14px;font-weight:600;color:#555;margin-bottom:1rem}.quiz-card{background:#fff;border:1px solid #f0e8e4;border-radius:12px;padding:1.25rem;margin-bottom:1rem}.quiz-q{font-size:14px;font-weight:500;color:#1a1a1a;margin-bottom:12px;line-height:1.6}.quiz-opts{display:flex;flex-direction:column;gap:8px}.opt{padding:11px 14px;border-radius:10px;border:1.5px solid #f0e8e4;font-size:14px;color:#333;cursor:pointer;background:#fff;transition:all .15s;text-align:left;font-family:inherit}.opt:hover:not(:disabled){background:#fef3f0;border-color:#e8513a}.opt.correct{background:#e8f5e9;border-color:#2e7d32;color:#1b5e20}.opt.wrong{background:#fdecea;border-color:#c62828;color:#b71c1c}.opt:disabled{cursor:not-allowed}.score-box{background:#fef3f0;border:1px solid #f0c8c0;border-radius:14px;padding:1.5rem;text-align:center;margin-top:1rem}.score-big{font-size:42px;font-weight:700;color:#e8513a;margin-bottom:6px}.score-msg{font-size:16px;color:#555;margin-bottom:1rem}.chat-wrap{background:#fff;border:1px solid #f0e8e4;border-radius:16px;overflow:hidden}.chat-header{background:#fef3f0;padding:.9rem 1.25rem;border-bottom:1px solid #f0e8e4;display:flex;align-items:center;gap:12px}.chat-avatar{font-size:26px}.chat-title{font-size:14px;font-weight:600;color:#1a1a1a}.chat-sub{font-size:11px;color:#aaa}.chat-msgs{padding:1rem;min-height:240px;max-height:360px;overflow-y:auto;display:flex;flex-direction:column;gap:10px}.msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:14px;line-height:1.65}.msg-bot{background:#f5f0ee;color:#333;align-self:flex-start;border-radius:4px 14px 14px}.msg-user{background:#e8513a;color:#fff;align-self:flex-end;border-radius:14px 4px 14px 14px}.msg-thinking{opacity:.6;font-style:italic}.suggest-row{display:flex;gap:6px;flex-wrap:wrap;padding:.5rem 1rem .75rem}.sug-btn{padding:6px 12px;border-radius:99px;border:1.5px solid #f0e0dc;background:#fef3f0;font-size:12px;color:#e8513a;cursor:pointer;font-family:inherit;transition:all .15s}.sug-btn:hover{background:#e8513a;color:#fff;border-color:#e8513a}.chat-input-row{display:flex;gap:8px;padding:.85rem 1rem;border-top:1px solid #f0e8e4}.chat-input{flex:1;padding:10px 14px;border:1.5px solid #f0e0dc;border-radius:10px;font-size:14px;background:#fff;color:#333;font-family:inherit;outline:none}.chat-input:focus{border-color:#e8513a}.page{max-width:720px;margin:0 auto;padding:1.5rem 1rem 3rem}.hero{background:#e8513a;border-radius:16px;padding:2rem 1.5rem;color:#fff;text-align:center;margin-bottom:1.5rem}.hero-icon{font-size:40px;margin-bottom:8px}.hero h1{font-size:40px;font-weight:600;margin-bottom:4px}.hero p{font-size:14px;opacity:.85}.tabs{display:flex;gap:8px;margin-bottom:1.25rem;flex-wrap:wrap}.tab{flex:1;min-width:130px;padding:10px 8px;border-radius:10px;border:1.5px solid #e0d8d4;background:#fff;font-size:13px;font-weight:500;cursor:pointer;text-align:center;color:#666;transition:all .15s}.tab:hover{background:#fef3f0;border-color:#e8513a;color:#e8513a}.tab.active{background:#e8513a;color:#fff;border-color:#e8513a}.content{min-height:400px}.footer{text-align:center;font-size:12px;color:#bbb;margin-top:2rem}.card{background:#fff;border:1px solid #f0e8e4;border-radius:14px;overflow:hidden;margin-bottom:1rem}.card-body{padding:1.25rem}.card-title{font-size:16px;font-weight:600;margin-bottom:4px;color:#1a1a1a}.card-sub{font-size:12px;color:#999;margin-bottom:12px}.card-text{font-size:14px;line-height:1.8;color:#333}.btn{padding:9px 20px;border-radius:10px;border:1.5px solid #e0d8d4;background:#fff;font-size:13px;cursor:pointer;color:#555;transition:all .15s;font-family:inherit}.btn:hover{background:#fef3f0}.btn:disabled{opacity:.35;cursor:not-allowed}.btn-primary{background:#e8513a;color:#fff;border-color:#e8513a}.btn-primary:hover{background:#c8402a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Segoe UI,system-ui,sans-serif;background:#fff8f5;min-height:100vh;color:#1a1a1a}