:root{--brand: #07C160;--brand-active: #06ad56;--bg: #EDEDED;--white: #FFFFFF;--text: #333333;--text-secondary: #999999;--border: #E5E5E5;--bubble-me: #95EC69;--bubble-other: #FFFFFF;--shadow: 0 1px 2px rgba(0,0,0,.05)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#app{height:100%;width:100%;overflow:hidden}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:#f5f5f5;color:var(--text)}.container{max-width:600px;margin:0 auto;height:100%;background:var(--bg);display:flex;flex-direction:column;box-shadow:0 0 20px #0000000d}.header{height:56px;background:linear-gradient(to right,#07c160,#1aad19);color:#fff;display:flex;align-items:center;padding:0 16px;font-weight:500;font-size:17px;box-shadow:0 1px 3px #0000001a;position:relative;z-index:10}.header-title{flex:1;text-align:center}.header-left,.header-right{width:60px;display:flex;align-items:center}.header-left{justify-content:flex-start}.header-right{justify-content:flex-end}.back-btn{color:#fff;text-decoration:none;font-size:15px;display:flex;align-items:center}.back-btn:before{content:"‹";font-size:24px;margin-right:4px;margin-top:-2px}.content{flex:1;overflow-y:auto;background:var(--bg)}.list{list-style:none;padding:0;margin:0}.item{display:flex;align-items:center;padding:12px 16px;background:var(--white);border-bottom:1px solid var(--border);transition:background .2s;cursor:pointer}.item:active,.item.active{background:#d9d9d9}.item:last-child{border-bottom:none}.avatar{width:44px;height:44px;border-radius:6px;background:linear-gradient(135deg,#e0e0e0,#f5f5f5);display:flex;align-items:center;justify-content:center;color:#666;font-weight:600;font-size:18px;margin-right:12px;flex-shrink:0;box-shadow:inset 0 0 1px #0000001a}.info{flex:1;min-width:0}.name-row{display:flex;justify-content:space-between;margin-bottom:4px}.name{font-size:16px;color:var(--text);font-weight:400}.time{font-size:12px;color:var(--text-secondary)}.last-msg{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-container{display:flex;flex-direction:column;height:100%;background:var(--bg)}.chat-list{flex:1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.msg-row{display:flex;margin-bottom:16px}.msg-row.me{flex-direction:row-reverse}.msg-row .avatar{width:40px;height:40px;margin:0}.msg-row.me .avatar{margin-left:10px}.msg-row.other .avatar{margin-right:10px}.bubble{max-width:70%;padding:10px 14px;border-radius:4px;font-size:16px;line-height:1.5;position:relative;word-break:break-word;box-shadow:0 1px 1px #0000000d}.msg-row.me .bubble{background:var(--bubble-me);color:#000;border-top-right-radius:0}.msg-row.other .bubble{background:var(--bubble-other);color:#000;border-top-left-radius:0}.input-area{background:#f7f7f7;border-top:1px solid var(--border);padding:10px 16px;display:flex;align-items:center;gap:10px;min-height:56px}.input-box{flex:1;background:#fff;border:1px solid #ddd;border-radius:4px;padding:8px 10px;font-size:16px;outline:none;transition:border-color .2s}.input-box:focus{border-color:var(--brand)}.send-btn{background:var(--brand);color:#fff;border:none;border-radius:4px;padding:6px 16px;font-size:14px;font-weight:500;height:36px;cursor:pointer;transition:background .2s}.send-btn:active{background:var(--brand-active)}.send-btn:disabled{opacity:.6;cursor:not-allowed}.avatar-container{position:relative;margin-right:12px}.avatar-container .avatar{margin-right:0}.badge-dot{position:absolute;top:-4px;right:-4px;background:#fa5151;color:#fff;font-size:10px;height:16px;min-width:16px;padding:0 4px;border-radius:8px;display:flex;align-items:center;justify-content:center;z-index:2;box-shadow:0 0 0 1px #fff;animation:popIn .3s cubic-bezier(.175,.885,.32,1.275)}.badge-tab{position:absolute;top:4px;right:25%;background:#fa5151;color:#fff;font-size:10px;height:16px;min-width:16px;padding:0 4px;border-radius:8px;display:flex;align-items:center;justify-content:center;animation:popIn .3s}@keyframes popIn{0%{transform:scale(0);opacity:0}to{transform:scale(1);opacity:1}}@keyframes slideUp{0%{transform:translateY(10px);opacity:0}to{transform:translateY(0);opacity:1}}.msg-row{animation:slideUp .3s ease-out}.settings-btn{padding:8px;color:#999;font-size:20px;margin-left:8px}.settings-panel{background:#f7f7f7;padding:12px 16px;border-bottom:1px solid var(--border);animation:slideDown .2s}@keyframes slideDown{0%{height:0;opacity:0}to{height:auto;opacity:1}}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid #eee}.setting-item:last-child{border-bottom:none}.switch{width:40px;height:24px;background:#ccc;border-radius:12px;position:relative;cursor:pointer;transition:background .2s}.switch.active{background:var(--brand)}.switch-handle{width:20px;height:20px;background:#fff;border-radius:50%;position:absolute;top:2px;left:2px;transition:left .2s;box-shadow:0 1px 2px #0003}.switch.active .switch-handle{left:18px}.auth-page{padding:40px 30px;display:flex;flex-direction:column;align-items:center}.auth-title{font-size:24px;font-weight:500;margin-bottom:40px;color:var(--text)}.form-group{width:100%;margin-bottom:20px}.form-input{width:100%;height:48px;border:none;border-bottom:1px solid #ddd;background:transparent;font-size:16px;outline:none;transition:border-color .3s}.form-input:focus{border-bottom-color:var(--brand)}.primary-btn{width:100%;height:48px;background:var(--brand);color:#fff;border:none;border-radius:4px;font-size:17px;font-weight:500;margin-top:20px;cursor:pointer}.primary-btn:active{opacity:.9}.link-btn{margin-top:20px;color:#576b95;font-size:14px;text-decoration:none}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-thumb{background:#0000001a;border-radius:3px}::-webkit-scrollbar-track{background:transparent}