:root{--wechat-green:#07c160;--wechat-dark-green:#06ad56;--wechat-bg:#ededed;--wechat-white:#fff;--wechat-dark:#191919;--wechat-gray:#999;--wechat-light-gray:#e5e5e5;--wechat-bubble-green:#95ec69;--wechat-link:#576b95;--wechat-red:#fa5151;--font-main:-apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{-webkit-tap-highlight-color:transparent;height:100%;overflow:hidden}body{background:var(--wechat-bg);color:var(--wechat-dark);font-family:var(--font-main);-webkit-font-smoothing:antialiased;max-width:480px;margin:0 auto;position:relative}.app{background:var(--wechat-bg);flex-direction:column;max-width:480px;height:100vh;margin:0 auto;display:flex;position:relative}.login-page{background:linear-gradient(#f0fff4 0%,#fff 50%,#f0fff4 100%);flex-direction:column;justify-content:center;align-items:center;height:100%;padding:40px 32px;display:flex}.login-header{text-align:center;margin-bottom:40px}.login-avatar{margin-bottom:16px;font-size:64px;animation:3s ease-in-out infinite float}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.login-title{color:var(--wechat-green);letter-spacing:4px;margin-bottom:8px;font-size:28px;font-weight:700}.login-subtitle{color:var(--wechat-gray);font-size:14px}.login-form{flex-direction:column;gap:16px;width:100%;max-width:320px;display:flex}.login-field{background:var(--wechat-white);border:1px solid var(--wechat-light-gray);border-radius:12px;align-items:center;gap:12px;padding:12px 16px;transition:border-color .2s;display:flex}.login-field:focus-within{border-color:var(--wechat-green)}.login-field-icon{flex-shrink:0;font-size:18px}.login-input{color:var(--wechat-dark);background:0 0;border:none;outline:none;flex:1;font-size:16px}.login-input::placeholder{color:#ccc}.login-error{color:var(--wechat-red);text-align:center;font-size:13px}.login-btn{background:var(--wechat-green);color:#fff;cursor:pointer;letter-spacing:4px;border:none;border-radius:12px;width:100%;padding:14px;font-size:17px;font-weight:600;transition:all .2s}.login-btn:hover{background:var(--wechat-dark-green)}.login-btn:disabled{opacity:.6;cursor:not-allowed}.login-switch{color:var(--wechat-gray);margin-top:24px;font-size:14px}.login-switch-btn{color:var(--wechat-link);cursor:pointer;background:0 0;border:none;margin-left:4px;font-size:14px}.login-hint{color:#ccc;text-align:center;margin-top:32px;font-size:12px}.app-header{background:var(--wechat-bg);border-bottom:.5px solid #d9d9d9;justify-content:space-between;align-items:center;min-height:52px;padding:8px 12px;display:flex}.header-back-btn{cursor:pointer;color:var(--wechat-dark);background:0 0;border:none;padding:6px 8px;font-size:22px}.header-center{align-items:center;gap:10px;display:flex}.header-avatar{font-size:28px}.header-avatar-img{object-fit:cover;border-radius:4px;width:36px;height:36px}.header-info{flex-direction:column;align-items:center;display:flex}.header-name{color:var(--wechat-dark);font-size:17px;font-weight:600}.header-spacer{width:40px}.emotion-indicator{align-items:center;gap:4px;font-size:11px;display:flex}.emotion-emoji{font-size:12px}.emotion-label{color:var(--wechat-gray);font-size:11px}.emotion-bar{background:var(--wechat-light-gray);border-radius:1px;width:40px;height:2px;overflow:hidden}.emotion-bar-fill{background:var(--wechat-green);border-radius:1px;height:100%;transition:width .5s}.app-main{background:var(--wechat-bg);flex:1;overflow:hidden}.app-footer{background:var(--wechat-bg);border-top:.5px solid #d9d9d9}.chat-window{background:var(--wechat-bg);flex-direction:column;gap:16px;height:100%;padding:12px 16px;display:flex;overflow-y:auto}.chat-window::-webkit-scrollbar{width:0}.chat-window--empty{justify-content:center;align-items:center}.empty-state{text-align:center}.empty-avatar{margin-bottom:12px;font-size:56px;animation:3s ease-in-out infinite float}.empty-avatar-img{object-fit:cover;border-radius:12px;width:72px;height:72px;margin-bottom:12px;animation:3s ease-in-out infinite float}.empty-name{color:var(--wechat-dark);margin-bottom:6px;font-size:18px;font-weight:600}.empty-hint{color:var(--wechat-gray);font-size:14px}.message-row{justify-content:flex-start;align-items:flex-start;gap:8px;animation:.2s fadeIn;display:flex}.message-row--user{justify-content:flex-end}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.avatar{background:var(--wechat-white);border-radius:4px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:22px;display:flex}.avatar--gf{background:#f0f0f0}.avatar--user{background:#d4e8ff}.avatar-inner{font-size:20px}.message-bubble{word-break:break-word;border-radius:4px;max-width:100%;padding:10px 12px;font-size:15px;line-height:1.5;position:relative}.bubble--gf{background:var(--wechat-white);color:var(--wechat-dark);border-top-left-radius:4px;position:relative}.bubble--gf:before{content:"";border-top:6px solid var(--wechat-white);border-left:6px solid #0000;width:0;height:0;position:absolute;top:10px;left:-6px}.bubble--user{background:var(--wechat-bubble-green);color:var(--wechat-dark)}.bubble--sticker{background:0 0;padding:4px 0}.bubble--sticker:before{display:none}.bubble-content{white-space:pre-wrap}.bubble-content--sticker{font-size:28px;line-height:1.2}.bubble-emotion{color:var(--wechat-gray);margin-top:2px;font-size:11px;display:block}.typing-indicator{background:var(--wechat-white);border-radius:4px;align-items:center;gap:4px;padding:10px 12px;display:flex;position:relative}.typing-indicator:before{content:"";border-top:6px solid var(--wechat-white);border-left:6px solid #0000;width:0;height:0;position:absolute;top:10px;left:-6px}.typing-dot{background:#bbb;border-radius:50%;width:7px;height:7px;animation:1.4s ease-in-out infinite typingBounce}.typing-dot:nth-child(2){animation-delay:.2s}.typing-dot:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,60%,to{opacity:.5;transform:translateY(0)}30%{opacity:1;transform:translateY(-6px)}}.input-area{background:var(--wechat-bg);padding:8px 12px;padding-bottom:max(8px, env(safe-area-inset-bottom))}.input-wrapper{align-items:center;gap:8px;display:flex}.emoji-toggle-btn{cursor:pointer;background:0 0;border:none;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:24px;display:flex}.input-field{background:var(--wechat-white);color:var(--wechat-dark);font-size:15px;font-family:var(--font-main);border:none;border-radius:6px;outline:none;flex:1;padding:10px 12px}.input-field::placeholder{color:#bbb}.send-btn{background:var(--wechat-green);color:#fff;cursor:pointer;border:none;border-radius:6px;flex-shrink:0;padding:8px 16px;font-size:15px;font-weight:500;transition:background .2s}.send-btn:hover:not(:disabled){background:var(--wechat-dark-green)}.send-btn:disabled{cursor:not-allowed;background:silver}.emoji-panel{background:var(--wechat-white);border-top:.5px solid #d9d9d9;flex-direction:column;height:260px;display:flex}.emoji-panel-header{justify-content:flex-end;padding:4px 8px;display:flex}.emoji-close-btn{color:var(--wechat-gray);cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:16px}.emoji-tabs{border-bottom:.5px solid #eee;flex-shrink:0;display:flex;overflow-x:auto}.emoji-tabs::-webkit-scrollbar{height:0}.emoji-tab{color:var(--wechat-gray);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;padding:8px 14px;font-size:13px;transition:all .2s}.emoji-tab--active{color:var(--wechat-green);border-bottom-color:var(--wechat-green);font-weight:500}.emoji-grid{flex:1;grid-template-columns:repeat(8,1fr);gap:4px;padding:10px;display:grid;overflow-y:auto}.emoji-item{aspect-ratio:1;cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;font-size:22px;transition:background .15s;display:flex}.emoji-item:hover{background:#f0f0f0}.settings-page{background:var(--wechat-bg);flex-direction:column;height:100%;display:flex}.settings-header{background:var(--wechat-white);border-bottom:.5px solid #d9d9d9;justify-content:space-between;align-items:center;padding:12px 16px;display:flex}.settings-back{color:var(--wechat-dark);cursor:pointer;background:0 0;border:none;font-size:16px}.settings-title{font-size:17px;font-weight:600}.settings-spacer{width:60px}.settings-body{flex-direction:column;flex:1;gap:20px;padding:16px;display:flex;overflow-y:auto}.settings-section{background:var(--wechat-white);border-radius:12px;padding:16px}.settings-label{color:var(--wechat-dark);margin-bottom:12px;font-size:14px;font-weight:500;display:block}.avatar-grid{grid-template-columns:repeat(5,1fr);gap:10px;display:grid}.avatar-option{cursor:pointer;background:#f8f8f8;border:2px solid #0000;border-radius:10px;flex-direction:column;align-items:center;gap:4px;padding:10px 6px;transition:all .2s;display:flex}.avatar-option--selected{border-color:var(--wechat-green);background:#f0fff4}.avatar-option-emoji{font-size:28px}.avatar-option-label{color:var(--wechat-gray);font-size:10px}.avatar-option--photo{border-style:dashed}.avatar-option-photo{object-fit:cover;border-radius:4px;width:28px;height:28px}.persona-option{border:1px solid var(--wechat-light-gray);background:var(--wechat-white);cursor:pointer;border-radius:8px;padding:10px;font-size:14px;transition:all .2s}.persona-option--selected{border-color:var(--wechat-green);color:var(--wechat-green);background:#f0fff4;font-weight:500}.settings-input{border:1px solid var(--wechat-light-gray);border-radius:8px;outline:none;width:100%;padding:10px 12px;font-size:15px;transition:border-color .2s}.settings-input:focus{border-color:var(--wechat-green)}.settings-preview{align-items:center;gap:12px;display:flex}.preview-avatar{background:#f0f0f0;border-radius:12px;justify-content:center;align-items:center;width:56px;height:56px;font-size:40px;display:flex}.preview-info{flex-direction:column;gap:2px;display:flex}.preview-name{font-size:18px;font-weight:600}.preview-persona{color:var(--wechat-gray);font-size:13px}.settings-message{text-align:center;color:var(--wechat-green);padding:8px;font-size:14px}.settings-save-btn{background:var(--wechat-green);color:#fff;cursor:pointer;border:none;border-radius:12px;width:100%;padding:14px;font-size:16px;font-weight:600;transition:background .2s}.settings-save-btn:hover{background:var(--wechat-dark-green)}.settings-save-btn:disabled{opacity:.6}.settings-danger{border:1px solid #fcc}.danger-btn{border:1px solid var(--wechat-red);width:100%;color:var(--wechat-red);cursor:pointer;background:0 0;border-radius:8px;padding:10px;font-size:14px;transition:all .2s}.danger-btn:hover{background:#fff0f0}.logout-btn{border:1px solid var(--wechat-light-gray);width:100%;color:var(--wechat-gray);cursor:pointer;background:0 0;border-radius:12px;margin-bottom:20px;padding:12px;font-size:15px;transition:all .2s}.logout-btn:hover{color:var(--wechat-red);border-color:var(--wechat-red)}.my-avatar-row{align-items:center;gap:16px;display:flex}.my-avatar-preview{background:#f0f0f0;border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:56px;height:56px;display:flex;overflow:hidden}.my-avatar-img{object-fit:cover;width:100%;height:100%}.my-avatar-placeholder{color:var(--wechat-gray);font-size:18px}.my-avatar-actions{flex-direction:column;gap:8px;display:flex}.avatar-upload-btn{background:var(--wechat-white);border:1px solid var(--wechat-green);color:var(--wechat-green);cursor:pointer;border-radius:6px;padding:8px 16px;font-size:14px;transition:all .2s}.avatar-upload-btn:hover{background:#f0fff4}.avatar-remove-btn{color:var(--wechat-red);cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:13px}.avatar-img{object-fit:cover;border-radius:4px;width:100%;height:100%}.avatar-svg-wrap{border-radius:4px;justify-content:center;align-items:center;width:100%;height:100%;display:flex;overflow:hidden}.avatar-option-svg{border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;display:flex;overflow:hidden}.settings-textarea{border:1px solid var(--wechat-light-gray);resize:vertical;width:100%;font-size:14px;line-height:1.6;font-family:var(--font-main);border-radius:8px;outline:none;padding:10px 12px;transition:border-color .2s}.settings-textarea:focus{border-color:var(--wechat-green)}.settings-textarea::placeholder{color:#bbb}.settings-label-hint{color:var(--wechat-gray);font-size:12px;font-weight:400}.settings-hint{color:var(--wechat-gray);margin-top:6px;font-size:12px;line-height:1.6}.settings-hint code{color:var(--wechat-green);background:#f0f0f0;border-radius:4px;padding:1px 6px;font-size:12px}.header-svg-avatar{border-radius:4px;justify-content:center;align-items:center;width:36px;height:36px;margin-right:-4px;display:flex;overflow:hidden}.empty-svg-avatar{justify-content:center;align-items:center;margin-bottom:12px;animation:3s ease-in-out infinite float;display:flex}.persona-page{background:linear-gradient(#fdf2f8 0%,#f8f9fa 40%,#fdf2f8 100%);flex-direction:column;height:100%;display:flex}.persona-header{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:10;background:#ffffffd9;border-bottom:.5px solid #f0d9e8;justify-content:space-between;align-items:center;padding:12px 16px;display:flex;position:sticky;top:0}.persona-back{color:var(--wechat-dark);cursor:pointer;background:0 0;border:none;padding:4px 8px;font-size:16px}.persona-title{background:linear-gradient(135deg,#f472b6,#8b5cf6);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:17px;font-weight:700}.persona-spacer{width:60px}.persona-body{flex-direction:column;flex:1;gap:16px;padding:16px;display:flex;overflow-y:auto}.persona-intro{text-align:center;color:#a78bfa;background:#a78bfa14;border-radius:16px;margin:0;padding:8px 16px;font-size:14px;line-height:1.6}.persona-grid{grid-template-columns:repeat(3,1fr);gap:10px;display:grid}.persona-card{cursor:pointer;text-align:center;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffd9;border:1.5px solid #f0e0f0;border-radius:16px;flex-direction:column;align-items:center;gap:8px;padding:14px 8px 12px;transition:all .25s;display:flex;position:relative}.persona-card:hover{border-color:#e9a0c8;transform:translateY(-2px);box-shadow:0 6px 20px #f472b626}.persona-card--selected{background:linear-gradient(135deg,#f472b614,#8b5cf614);border-color:#f472b6;transform:translateY(-2px);box-shadow:0 0 0 2px #f472b640}.persona-card--active{background:linear-gradient(135deg,#8b5cf60d,#a78bfa0d);border-color:#8b5cf6}.persona-card--active:before{content:"";background:#8b5cf6;border-radius:50%;width:8px;height:8px;position:absolute;top:4px;right:4px}.persona-card-avatar{background:linear-gradient(135deg,#fef5fa,#f5f0ff);border-radius:50%;justify-content:center;align-items:center;display:flex;overflow:hidden}.persona-card-info{flex-direction:column;gap:2px;width:100%;display:flex;overflow:hidden}.persona-card-name{color:#333;justify-content:center;align-items:center;gap:4px;font-size:13px;font-weight:600;display:flex}.persona-card-badge{color:#fff;background:linear-gradient(135deg,#8b5cf6,#a78bfa);border-radius:6px;padding:1px 5px;font-size:10px;font-weight:500}.persona-card-desc{color:#999;white-space:nowrap;text-overflow:ellipsis;font-size:11px;overflow:hidden}.persona-detail{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;border:1px solid #f0d9e8;border-radius:16px;flex-direction:column;gap:12px;padding:16px;animation:.3s slideUp;display:flex}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.persona-detail-header{align-items:center;gap:12px;display:flex}.persona-detail-avatar{background:linear-gradient(135deg,#fef5fa,#f5f0ff);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex;overflow:hidden}.persona-detail-title{flex-direction:column;gap:2px;display:flex}.persona-detail-name{color:#333;font-size:18px;font-weight:700}.persona-detail-tag{color:#f472b6;font-size:13px;font-weight:500}.persona-detail-desc{color:#666;background:#f472b60d;border-radius:10px;margin:0;padding:8px 12px;font-size:14px;line-height:1.7}.persona-apply-btn{color:#fff;cursor:pointer;letter-spacing:2px;background:linear-gradient(135deg,#f472b6,#8b5cf6);border:none;border-radius:12px;width:100%;padding:14px;font-size:16px;font-weight:600;transition:all .2s}.persona-apply-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 16px #f472b659}.persona-apply-btn:disabled{opacity:.6;cursor:not-allowed}.persona-message{text-align:center;color:#8b5cf6;margin:0;padding:4px;font-size:14px;animation:.3s fadeIn}.study-page{background:linear-gradient(#fdf4ff 0%,#f5f3ff 50%,#fdf4ff 100%);flex-direction:column;height:100%;display:flex}.study-header{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffd9;border-bottom:.5px solid #e8d8f0;justify-content:space-between;align-items:center;padding:10px 14px;display:flex}.study-back-btn{color:var(--wechat-dark);cursor:pointer;background:0 0;border:none;padding:4px 6px;font-size:16px}.study-title{background:linear-gradient(135deg,#a855f7,#6366f1);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:17px;font-weight:700}.study-chat-toggle{cursor:pointer;background:0 0;border:1px solid #e0d0f0;border-radius:8px;padding:4px 10px;font-size:18px;transition:all .2s}.study-chat-toggle:hover{background:#f5f0ff}.study-body{flex-direction:column;flex:1;display:flex;overflow-y:auto}.study-main{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:12px;padding:12px 16px;display:flex}.study-girl-container{flex-direction:column;align-items:center;display:flex;position:relative}.study-girl-wrap{justify-content:center;align-items:center;display:flex}.study-saving{color:#a855f7;background:#a855f71a;border-radius:8px;padding:2px 8px;font-size:11px;animation:.3s fadeIn;position:absolute;top:8px;right:-8px}.study-timer{flex-direction:column;align-items:center;gap:12px;width:100%;max-width:300px;display:flex}.study-timer-display{flex-direction:column;align-items:center;gap:4px;display:flex}.study-timer-time{font-variant-numeric:tabular-nums;color:#2d1b4e;letter-spacing:3px;font-size:42px;font-weight:700}.study-timer-status{color:#999;font-size:13px;transition:color .3s}.study-timer-status--on{color:#a855f7;font-weight:500}.study-timer-controls{gap:12px;display:flex}.timer-btn{cursor:pointer;border:none;border-radius:20px;padding:10px 24px;font-size:15px;font-weight:600;transition:all .2s}.timer-btn--start{color:#fff;background:linear-gradient(135deg,#a855f7,#7c3aed)}.timer-btn--start:hover{transform:translateY(-1px);box-shadow:0 4px 16px #a855f759}.timer-btn--pause{color:#fff;background:linear-gradient(135deg,#f59e0b,#d97706)}.timer-btn--pause:hover{transform:translateY(-1px);box-shadow:0 4px 16px #f59e0b59}.timer-btn--reset{color:#7c3aed;background:#f0e8f8}.timer-btn--reset:hover:not(:disabled){background:#e4d4f4}.timer-btn--reset:disabled{opacity:.4;cursor:not-allowed}.study-stats{gap:12px;width:100%;max-width:300px;display:flex}.study-stat-card{background:#fffc;border:1px solid #f0e0f4;border-radius:14px;flex-direction:column;flex:1;align-items:center;gap:4px;padding:12px;display:flex}.study-stat-value{color:#4c1d95;font-size:20px;font-weight:600}.study-stat-label{color:#999;font-size:12px}.study-chat{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;border-top:1px solid #e8d8f0;flex-direction:column;max-height:40vh;animation:.25s slideUp;display:flex}.study-chat-header{color:#6d28d9;border-bottom:.5px solid #f0e0f4;justify-content:space-between;align-items:center;padding:10px 14px;font-size:14px;font-weight:600;display:flex}.study-chat-close{color:#999;cursor:pointer;background:0 0;border:none;padding:2px 6px;font-size:14px}.study-chat-messages{flex-direction:column;flex:1;gap:10px;max-height:200px;padding:10px 14px;display:flex;overflow-y:auto}.study-chat-empty{text-align:center;color:#ccc;padding:20px;font-size:13px}.study-chat-msg{flex-direction:column;gap:2px;max-width:85%;display:flex}.study-chat-msg--user{align-self:flex-end}.study-chat-msg--gf{align-self:flex-start}.study-chat-role{color:#a78bfa;padding:0 4px;font-size:11px}.study-chat-text{border-radius:12px;margin:0;padding:8px 12px;font-size:14px;line-height:1.4}.study-chat-msg--user .study-chat-text{color:#fff;background:linear-gradient(135deg,#a855f7,#7c3aed);border-bottom-right-radius:4px}.study-chat-msg--gf .study-chat-text{color:#4c1d95;background:#f5f0ff;border-bottom-left-radius:4px}.study-chat-input{border-top:.5px solid #f0e0f4;align-items:center;gap:8px;padding:10px 14px;display:flex}.study-chat-field{font-size:14px;font-family:var(--font-main);background:#f8f5ff;border:1px solid #e8d8f0;border-radius:16px;outline:none;flex:1;padding:8px 14px}.study-chat-field:focus{border-color:#a855f7}.study-chat-send{color:#fff;cursor:pointer;background:linear-gradient(135deg,#a855f7,#7c3aed);border:none;border-radius:16px;padding:8px 16px;font-size:13px;font-weight:500;transition:all .2s}.study-chat-send:hover:not(:disabled){box-shadow:0 2px 10px #a855f74d}.study-chat-send:disabled{opacity:.5;cursor:not-allowed}@media (width>=481px){body{background:#f5f5f5}.app{max-width:430px;box-shadow:0 0 20px #0000001a}.persona-grid{grid-template-columns:repeat(3,1fr);gap:12px}}