:root{--font-ui:"STSong", "Songti SC", "Kaiti SC", "STKaiti", "Noto Serif SC", "Source Han Serif SC", serif;--text-primary:#3e3227;--text-secondary:#695f52;--line-soft:#d7c7ab;--line-strong:#bea889;--surface-glass:#f6efe2c7;--surface-soft:#faf5ebb3;--accent-700:#6f5136;--accent-800:#583f2a;--paper-strong:#f8f1e6;--shadow-soft:0 18px 36px #32241833;--site-bg-image:url(/assets/furong-theme-bg-C79cTR_t.jpg)}*,:before,:after{box-sizing:border-box}html,body,#app{min-height:100%;margin:0}body{font-family:var(--font-ui);color:var(--text-primary);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;background:#d9d6cd;position:relative}body:before,body:after{content:"";pointer-events:none;position:fixed;inset:0}body:before{z-index:-2;background-image:var(--site-bg-image);filter:saturate(.75)contrast(.86);opacity:.58;background-position:50%;background-repeat:no-repeat;background-size:cover}body:after{z-index:-1;background:radial-gradient(circle at 12% 20%,#faf5eb8a,#0000 42%),radial-gradient(circle at 86% 10%,#e4dccb70,#0000 46%),linear-gradient(#f1e9d78f 0%,#e2d7c39e 100%)}#app{min-height:100svh;position:relative}input,select,button,textarea{font:inherit}a{color:inherit}.login-page,.student-page,.teacher-page,.qa-page,.debate-page{background:0 0!important}.login-container,.module-content,.prompt-card,.compose-card,.submission-panel,.question-card,.answer-card,.category-group,.category-item,.studio-chat-card,.studio-avatar-card,.wordcloud-image-box,.top-words,.debate-card,.debate-detail,.stat-card,.empty-state,.loading-panel,.warn-panel{box-shadow:var(--shadow-soft);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:var(--surface-glass)!important;border-color:var(--line-soft)!important}.nav-bar{background:linear-gradient(90deg,#412f20f5,#5e4631f0)!important;box-shadow:0 4px 12px #281b1152!important}.nav-tab{letter-spacing:.06em;color:var(--paper-strong)!important}.nav-tab:hover{background:#eedfc62e!important}.nav-tab.active{color:#fff7eb!important;background:#f7eddc3d!important;box-shadow:inset 0 -3px #fff6e5f2!important}.user-info-nav{color:var(--paper-strong)!important}.module-header h2,.section-header h1,.student-section h2,.top-words h3,.studio-chat-card h3,.studio-avatar-card h3,.debate-head h3,.debate-detail h3{color:#60452f!important}.module-description,.question-meta,.studio-meta,.studio-hint,.compose-hint,.prompt-progress,.last-refresh,.debate-meta,.debate-message,.prompt-title,.prompt-text{color:var(--text-secondary)!important}.refresh-btn,.login-btn,.ai-btn,.scene-voice-btn{box-shadow:0 8px 18px #49331e38;color:#fff5e7!important;background:linear-gradient(180deg, var(--accent-700) 0%, var(--accent-800) 100%)!important;border:1px solid #7f6041!important}.status-btn,.detail-btn,.scene-replay-btn,.last-refresh{color:#5b4630!important;border:1px solid var(--line-strong)!important;background:#ede2cfe0!important}.logout-btn-nav{color:#fff0e6!important;background:#7f4134!important}.logout-btn-nav:hover{background:#6c372d!important}.compose-input,.studio-input,input,textarea,select{color:#3d3127!important;background:#fff9efeb!important;border-color:#bda78a!important}.compose-input::placeholder,.studio-input::placeholder,input::placeholder,textarea::placeholder{color:#8a795f!important}.compose-input:focus,.studio-input:focus,input:focus,textarea:focus,select:focus{outline:none;border-color:#8c6a47!important;box-shadow:0 0 0 3px #8c6a4733!important}.question-text,.answer-card .question-text,.category-item .question-text,.studio-bubble,.debate-message{color:#43362b!important}.studio-student .studio-bubble{color:#fff4e7!important;background:#705339!important}.studio-ai .studio-bubble{color:#47392e!important;background:#f4ead8e6!important;border-color:#ccb79a!important}.status-ongoing{color:#4d6d40!important;background:#e6efdf!important}.status-paused{color:#8c6d2e!important;background:#f7ebd1!important}.status-finished{color:#615a51!important;background:#e7dfd2!important}.module-content.avatar-only-module{background:#e7dfd0d1!important}.module-content.avatar-only-module .teacher-debate-studio{background:#cec2afad!important;border-color:#b79f82!important}.module-content.avatar-only-module .studio-chat-log{background:#fff9efa3!important;border-color:#c0aa8f!important}.scene-avatar-panel{background:linear-gradient(#fcf5e9a3 0%,#ebdec6a3 100%)!important;border-color:#bda88e!important}.scene-avatar-image{filter:drop-shadow(0 16px 22px #4d382438)}.scene-avatar-symbol{background:radial-gradient(circle at 34% 28%,#a97f56 0%,#65482e 72%)!important}.scene-avatar-text,.studio-tts-status{color:#66523f!important}.student-grid,.login-section{background:#f6eddec2!important;border-color:#cfbfa3!important}.student-number-btn{color:#604630!important;background:#fffaf1e6!important;border-color:#6b5138!important}.student-number-btn:hover,.student-number-btn.selected{color:#fff3e2!important;background:#6b5138!important;box-shadow:0 8px 14px #553e283d!important}@media (width<=760px){.user-info-nav{background:#4a3727e6!important}}