:root{--primary-green: #07c160;--primary-green-hover: #06ad56;--primary-green-light: #d1f3d1;--primary-blue: #1677ff;--primary-purple: #722ed1;--gray-50: #fafafa;--gray-100: #f5f5f5;--gray-200: #eeeeee;--gray-300: #e0e0e0;--gray-400: #bdbdbd;--gray-500: #9e9e9e;--gray-600: #757575;--gray-700: #616161;--gray-800: #424242;--gray-900: #212121;--success: #52c41a;--warning: #faad14;--error: #ff4d4f;--info: #1677ff;--wechat-green: #07c160;--wechat-dark: #191919;--wechat-sidebar: #2c2c2c;--wechat-panel: #f7f7f7;--wechat-border: #e5e5e5;--wechat-chat-bg: #f5f5f5;--text-primary: #1f2937;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--text-inverse: #ffffff;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-xl: 18px;--radius-full: 9999px;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.6;font-weight:400;color:var(--text-primary);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-text-size-adjust:100%}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-tap-highlight-color:transparent}body{margin:0;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2);background-attachment:fixed}#root{min-height:100vh}a{color:var(--primary-blue);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-green)}button{font:inherit;cursor:pointer;border:none;outline:none}input,textarea,select{font:inherit;outline:none;border:1px solid var(--gray-300);transition:border-color .2s ease,box-shadow .2s ease}input:focus,textarea:focus,select:focus{border-color:var(--primary-blue);box-shadow:0 0 0 3px #1677ff1a}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--gray-100);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb{background:var(--gray-400);border-radius:var(--radius-full);transition:background .2s ease}::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.fw-normal{font-weight:400}.fw-medium{font-weight:500}.fw-semibold{font-weight:600}.fw-bold{font-weight:700}.text-sm{font-size:.875rem}.text-base{font-size:1rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.25rem}.mb-0{margin-bottom:0}.mb-1{margin-bottom:var(--spacing-sm)}.mb-2{margin-bottom:var(--spacing-md)}.mb-3{margin-bottom:var(--spacing-lg)}.mt-0{margin-top:0}.mt-1{margin-top:var(--spacing-sm)}.mt-2{margin-top:var(--spacing-md)}.mt-3{margin-top:var(--spacing-lg)}.app-shell{height:100vh;display:flex;flex-direction:column;background:var(--gray-100);min-height:100vh}.app-header{height:60px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;box-shadow:0 2px 8px #0000001a;position:relative;z-index:10;flex-shrink:0}.app-header h1{font-size:1.375rem;font-weight:600;margin:0;letter-spacing:-.3px;line-height:1.2}.app-header .subtitle{font-size:.8125rem;opacity:.85;margin-top:3px;font-weight:400}.app-nav{display:flex;gap:.375rem}.app-nav a{color:#ffffffd9;padding:.5rem 1rem;border-radius:var(--radius-md);transition:all .2s ease;font-weight:500;font-size:.875rem}.app-nav a:hover{background:#ffffff26;color:#fff}.app-nav a.active{background:#ffffff40;color:#fff}.user-chip{display:flex;align-items:center;gap:.75rem;padding:.375rem .875rem;background:#ffffff26;border-radius:var(--radius-full);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.user-chip span{font-weight:500;font-size:.875rem}.user-chip button{padding:.375rem .875rem;background:#fff3;color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:var(--radius-full);font-size:.8125rem;transition:all .2s ease}.user-chip button:hover{background:#ffffff4d;border-color:#ffffff80}.app-main{flex:1;overflow:hidden;display:flex;justify-content:center;align-items:stretch;padding:1.5rem 0}.mfa-debug-hint{position:fixed;right:1.25rem;bottom:1.25rem;z-index:1000;background:#111827e6;color:#fff;padding:.5rem .75rem;border-radius:9999px;font-size:.75rem;display:flex;align-items:center;gap:.35rem;box-shadow:0 4px 12px #00000040}.mfa-debug-hint strong{letter-spacing:.12em;font-weight:700}.btn{border:none;border-radius:var(--radius-md);padding:.5rem 1rem;font-weight:500;cursor:pointer;transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:.375rem;font-size:.875rem;line-height:1.5;text-align:center;white-space:nowrap}.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn:active{transform:translateY(0)}.btn.primary{background:var(--primary-green);color:#fff}.btn.primary:hover{background:var(--primary-green-hover)}.btn.secondary{background:var(--gray-200);color:var(--text-primary)}.btn.secondary:hover{background:var(--gray-300)}.btn.ghost{background:transparent;color:var(--text-secondary);border:1px solid var(--gray-300)}.btn.ghost:hover{background:var(--gray-100);border-color:var(--gray-400)}.btn.danger{background:var(--error);color:#fff}.btn.danger:hover{background:#ff7875}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-sm{padding:.375rem .75rem;font-size:.8125rem}.btn-lg{padding:.625rem 1.25rem;font-size:.9375rem}.icon-btn{border:none;background:transparent;font-size:1.125rem;cursor:pointer;padding:.5rem;border-radius:var(--radius-md);transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;min-width:36px;min-height:36px}.icon-btn:hover{background:var(--gray-200)}.panel{background:#fff;border-radius:var(--radius-lg);padding:1.25rem 1.5rem;box-shadow:0 2px 8px #00000014;margin-bottom:1rem}.panel h2{margin:0 0 1rem;font-size:1.125rem;font-weight:600;color:var(--text-primary)}.panel h3{margin:0 0 .75rem;font-size:1rem;font-weight:600;color:var(--text-primary)}.card{background:#fff;border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);transition:all .2s ease;border:1px solid var(--gray-200)}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.avatar{width:38px;height:38px;border-radius:8px;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-weight:600;color:#fff;font-size:.9375rem;flex-shrink:0}.avatar.large{width:48px;height:48px;border-radius:10px;font-size:1.25rem}.avatar.small{width:32px;height:32px;border-radius:6px;font-size:.875rem}.avatar.highlight{background:linear-gradient(135deg,#f093fb,#f5576c)}.wechat-shell{display:flex;height:100%;max-width:1500px;width:100%;background:#fff;box-shadow:0 8px 24px #0000001f;margin:0 auto;border-radius:12px;overflow:hidden}.wechat-sidebar{width:96px;background:var(--wechat-sidebar);color:#fff;display:flex;flex-direction:column;align-items:center;gap:.5rem;padding:1rem 0;flex-shrink:0}.wechat-sidebar .avatar.large{margin-bottom:.75rem}.wechat-sidebar button{background:none;border:none;color:#9ca3af;padding:.75rem;width:100%;cursor:pointer;position:relative;transition:all .2s ease;font-size:1.125rem;line-height:1}.wechat-sidebar button.active,.wechat-sidebar button:hover{color:#fff;background:#ffffff1a}.wechat-sidebar .dot{position:absolute;top:8px;right:16px;width:8px;height:8px;border-radius:50%;background:var(--error);animation:pulse-dot 2s ease-in-out infinite}@keyframes pulse-dot{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.1)}}.wechat-list-pane{width:360px;background:var(--wechat-panel);border-right:1px solid var(--wechat-border);display:flex;flex-direction:column;flex-shrink:0}.chatlist-panel,.contacts-panel,.settings-pane{display:flex;flex-direction:column;height:100%;padding:1rem}.chatlist-toolbar,.contacts-toolbar{display:flex;gap:.5rem;margin-bottom:1rem;align-items:center}.chatlist-search{flex:1;border-radius:var(--radius-md);border:1px solid var(--wechat-border);padding:.5rem .75rem;background:#fff;font-size:.875rem}.chatlist-scroll,.contacts-scroll{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:var(--spacing-sm)}.chatlist-item{border:none;border-radius:var(--radius-md);padding:.75rem;display:flex;gap:.75rem;align-items:center;background:#fff;cursor:pointer;text-align:left;transition:all .2s ease;border:2px solid transparent}.chatlist-item:hover{background:var(--gray-50);transform:translate(2px)}.chatlist-item.active{background:#fff;border-color:var(--primary-green);box-shadow:var(--shadow-sm)}.chatlist-meta{flex:1;min-width:0}.chatlist-meta .title-row{display:flex;justify-content:space-between;align-items:center;font-size:.875rem;font-weight:500;margin-bottom:.25rem}.chatlist-meta .title-row strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;color:var(--text-primary)}.chatlist-meta small{color:var(--text-secondary);font-size:.75rem}.type-tag{font-size:.6875rem;color:var(--text-tertiary);background:var(--gray-200);padding:.125rem .5rem;border-radius:4px;display:inline-block;font-weight:500}.contacts-panel section{margin-bottom:2.5 rem}.contacts-panel h4{font-size:.6 rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;margin-bottom:.75rem}.contact-item{display:flex;align-items:center;gap:.75rem;background:#fff;padding:.75rem 1.25rem;width:100%;border-radius:var(--radius-md);transition:all .2s ease;cursor:pointer}.contact-item:hover{background:var(--gray-50);transform:translate(2px)}.contact-item.pending{opacity:.7;background:var(--gray-100)}.contact-meta{flex:1;min-width:0}.contact-meta strong{display:block;font-weight:500;margin-bottom:.125rem;font-size:.875rem;color:var(--text-primary)}.contact-meta small{color:var(--text-secondary);font-size:.75rem}.action-group{display:flex;gap:.375rem}.wechat-chat-pane{flex:1;display:flex;flex-direction:column;background:var(--wechat-chat-bg)}.chat-header{height:60px;border-bottom:1px solid var(--wechat-border);display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem;background:#fff;flex-shrink:0}.chat-header strong{font-size:1rem;font-weight:600;display:block;margin-bottom:.125rem;color:var(--text-primary)}.chat-header small{color:var(--text-secondary);font-size:.75rem}.chat-actions{display:flex;gap:.375rem;align-items:center}.chat-actions .icon-btn{font-size:1.25rem;width:36px;height:36px}.chat-window{flex:1;display:flex;flex-direction:column;padding:1.5rem;overflow:hidden}.message-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:.75rem;padding-right:.5rem}.message{display:flex;gap:.75rem;align-items:flex-start;animation:messageIn .3s ease}@keyframes messageIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message.me{justify-content:flex-end}.bubble{background:#fff;border-radius:var(--radius-md);padding:.625rem .875rem;max-width:65%;box-shadow:0 1px 3px #00000014;word-wrap:break-word;word-break:break-word;position:relative;font-size:.875rem;line-height:1.5}.message.me .bubble{background:var(--primary-green-light)}.bubble a{color:var(--primary-blue);font-weight:500;text-decoration:underline}.bubble small{display:block;margin-top:.375rem;color:var(--text-tertiary);font-size:.6875rem}.file-message{display:flex;align-items:center;gap:.75rem;padding:.625rem;background:var(--gray-50);border-radius:var(--radius-md);min-width:220px}.message.me .file-message{background:#07c16014}.file-icon{font-size:1.75rem;flex-shrink:0;line-height:1}.file-info{flex:1;min-width:0}.file-name{font-weight:500;color:var(--text-primary);margin-bottom:.375rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.8125rem}.file-download{display:inline-flex;align-items:center;gap:.25rem;padding:.375rem .875rem;background:var(--primary-blue);color:#fff!important;border:none;border-radius:6px;font-size:.8125rem;font-weight:500;text-decoration:none!important;cursor:pointer;transition:all .2s ease}.file-download:hover:not(:disabled){background:var(--primary-green);transform:translateY(-1px)}.file-download:disabled{opacity:.6;cursor:not-allowed;transform:none}.empty-hint{text-align:center;color:var(--text-secondary);padding:1.5rem 0;font-size:.875rem}.chat-empty{margin:auto;color:var(--text-secondary);font-size:1rem;text-align:center}.composer{display:flex;align-items:center;gap:.75rem;border-top:1px solid var(--wechat-border);padding-top:1rem;background:var(--wechat-chat-bg)}.composer-input{flex:1;border:1px solid var(--gray-300);border-radius:var(--radius-md);padding:.625rem .875rem;background:#fff;font-size:.875rem;transition:border-color .2s ease}.composer-input:focus{border-color:var(--primary-green)}.video-modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;display:flex;align-items:center;justify-content:center;z-index:999;animation:fadeIn .3s ease;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.video-modal-content{width:650px;max-width:90vw;background:#1a1a1a;color:#fff;border-radius:16px;padding:1.5rem;display:flex;flex-direction:column;gap:1.25rem;animation:slideUp .3s ease;box-shadow:0 20px 40px #0006}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.video-modal-content header{display:flex;justify-content:space-between;align-items:center}.video-modal-content header strong{font-size:1.125rem;font-weight:600}.video-modal-content header small{display:block;color:#9ca3af;font-size:.8125rem;margin-top:.25rem;font-weight:400}.video-calling-animation{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl) var(--spacing-lg);gap:var(--spacing-xl)}.calling-avatar{width:120px;height:120px;border-radius:50%;background:linear-gradient(135deg,#667eea,#764ba2);display:flex;align-items:center;justify-content:center;font-size:3rem;color:#fff;position:relative;animation:pulse 2s ease-in-out infinite;box-shadow:0 8px 30px #667eea59}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.calling-avatar:before,.calling-avatar:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:100%;height:100%;border-radius:50%;border:3px solid rgba(102,126,234,.5);animation:ripple 2s ease-out infinite}.calling-avatar:after{animation-delay:1s}@keyframes ripple{0%{width:100%;height:100%;opacity:1}to{width:160%;height:160%;opacity:0}}.calling-text{font-size:1.25rem;font-weight:500;color:#fff;text-align:center}.calling-status{font-size:.9375rem;color:#9ca3af;animation:blink 1.5s ease-in-out infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:.5}}.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;min-height:360px}.video-grid video{width:100%;height:100%;object-fit:cover;border-radius:var(--radius-lg);background:#000}.video-actions{display:flex;justify-content:center;gap:1rem}.video-actions .btn{min-width:120px;padding:.625rem 1.5rem;font-size:.9375rem;border-radius:var(--radius-full);font-weight:600}.video-actions .btn.primary{background:var(--primary-green)}.video-actions .btn.primary:hover{background:var(--primary-green-hover)}.video-actions .btn.secondary{background:var(--error)}.video-actions .btn.secondary:hover{background:#ff7875}.login-page,.mfa-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl)}.auth-card{width:100%;max-width:420px;background:#fff;border-radius:16px;padding:2rem;box-shadow:0 16px 48px #0000001f;animation:slideUp .4s ease}.auth-card h1{font-size:1.875rem;font-weight:700;margin-bottom:.5rem;text-align:center;background:linear-gradient(135deg,#667eea,#764ba2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-card p{text-align:center;color:var(--text-secondary);margin-bottom:1.5rem;font-size:.875rem}.auth-card form{display:flex;flex-direction:column;gap:1rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:500;color:var(--text-primary);font-size:.875rem}.form-group input{padding:.625rem .875rem;border:1px solid var(--gray-300);border-radius:var(--radius-md);font-size:.9375rem;transition:all .2s ease}.form-group input:focus{border-color:var(--primary-blue);box-shadow:0 0 0 3px #1677ff1a}.error-message{padding:var(--spacing-md);background:#fff1f0;border:1px solid #ffccc7;border-radius:var(--radius-md);color:var(--error);font-size:.875rem;text-align:center}.success-message{padding:var(--spacing-md);background:#f6ffed;border:1px solid #b7eb8f;border-radius:var(--radius-md);color:var(--success);font-size:.875rem;text-align:center}.auth-footer{text-align:center;margin-top:var(--spacing-lg);color:var(--text-secondary);font-size:.875rem}.auth-footer button{background:none;border:none;color:var(--primary-blue);cursor:pointer;font-weight:500;text-decoration:underline}.qr-code-container{display:flex;justify-content:center;padding:var(--spacing-lg);background:var(--gray-50);border-radius:var(--radius-lg);margin:var(--spacing-lg) 0}.settings-pane{overflow-y:auto}.settings-pane .panel{background:#fff;border-radius:var(--radius-lg);padding:var(--spacing-xl);margin-bottom:var(--spacing-lg)}.settings-pane .panel:last-child{margin-bottom:0}.mfa-section{display:flex;flex-direction:column;gap:var(--spacing-lg)}.mfa-badge{display:inline-flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:var(--gray-100);border-radius:var(--radius-full);font-size:.875rem;font-weight:500}.mfa-badge.enabled{background:#f6ffed;color:var(--success)}.log-table{width:100%;border-collapse:collapse}.log-table th{background:var(--gray-100);padding:.75rem;border-bottom:2px solid var(--gray-300);font-size:.8125rem;font-weight:600;text-align:left;color:var(--text-primary)}.log-table td{padding:.625rem .75rem;border-bottom:1px solid var(--gray-200);font-size:.8125rem;color:var(--text-secondary)}.log-table tr:hover{background:var(--gray-50)}.log-level{display:inline-block;padding:4px 8px;border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;text-transform:uppercase}.log-level.info{background:#e6f7ff;color:var(--info)}.log-level.warn{background:#fffbe6;color:var(--warning)}.log-level.error{background:#fff1f0;color:var(--error)}.dashboard-container{width:100%;padding:1.5rem;max-width:1400px;margin:0 auto}.dashboard-header{margin-bottom:1.5rem}.dashboard-header h1{font-size:1.75rem;font-weight:700;margin-bottom:.375rem;color:var(--text-primary)}.dashboard-header p{color:var(--text-secondary);font-size:.875rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}.stat-card{background:#fff;padding:1.25rem;border-radius:var(--radius-lg);box-shadow:0 2px 8px #00000014;transition:all .2s ease}.stat-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.stat-label{font-size:.8125rem;color:var(--text-secondary);font-weight:500;margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.5px;display:flex;align-items:center}.stat-value{font-size:2rem;font-weight:700;color:var(--text-primary);line-height:1}.chart-container{background:#fff;padding:1.5rem;border-radius:var(--radius-lg);box-shadow:0 2px 8px #00000014;margin-bottom:1.5rem}.chart-container h2{margin:0 0 1.25rem;font-size:1.125rem;font-weight:600;color:var(--text-primary)}@media(max-width:768px){.wechat-shell{flex-direction:column;margin:0;border-radius:0}.wechat-sidebar{width:100%;flex-direction:row;padding:var(--spacing-md);height:auto;order:2}.wechat-sidebar .avatar.large{width:36px;height:36px;font-size:1rem;margin-bottom:0}.wechat-list-pane{width:100%;order:1}.wechat-chat-pane{flex:1;order:0}.video-modal-content{width:95%;max-width:none}.video-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.app-header{padding:0 var(--spacing-md)}.app-nav{display:none}}@media(max-width:480px){.stats-grid{grid-template-columns:1fr}.auth-card{padding:var(--spacing-lg)}.calling-avatar{width:100px;height:100px;font-size:2.5rem}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite}.loading.dark{border-color:#0000001a;border-top-color:var(--primary-green)}