:root{--color-bg: #ededed;--color-card: #ffffff;--color-text: #1f2329;--color-muted: #86909c;--color-primary: #07c160;--color-primary-dark: #06ad56;--color-error: #e5484d;--color-error-bg: #fdecec;--color-border: #e5e6eb;--color-bubble-other: #f7f7f7;--color-badge: #fa5151;--header-height: 52px;--tabbar-height: 56px}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);-webkit-font-smoothing:antialiased}#app{min-height:100vh}button{font-family:inherit}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px}.auth-card{width:100%;max-width:400px;background:var(--color-card);border:1px solid var(--color-border);border-radius:16px;padding:32px 24px;display:flex;flex-direction:column;gap:16px}.auth-card h1{margin:0;font-size:22px;text-align:center}.field{display:flex;flex-direction:column;gap:6px;font-size:14px}.field>span{color:var(--color-muted)}.field input{padding:10px 12px;border:1px solid var(--color-border);border-radius:8px;font-size:16px;background:var(--color-card);color:var(--color-text)}.field input:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary)}.field-error,.form-error{margin:0;font-size:13px;color:var(--color-error)}.form-error{text-align:center;background:var(--color-error-bg);border-radius:8px;padding:8px 12px}.auth-card button{margin-top:8px;padding:12px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:16px;cursor:pointer}.auth-card button:hover:not(:disabled){background:var(--color-primary-dark)}.auth-card button:disabled{opacity:.6;cursor:not-allowed}.auth-switch{margin:0;text-align:center;font-size:14px;color:var(--color-muted)}.auth-switch a{color:var(--color-primary);text-decoration:none}.page.with-tabbar{min-height:100vh;display:flex;flex-direction:column;background:var(--color-card)}.page-header{height:var(--header-height);display:flex;align-items:center;padding:0 16px;background:var(--color-card);border-bottom:1px solid var(--color-border);position:sticky;top:0;z-index:10}.page-header h1{margin:0;font-size:17px;font-weight:600}.page-body{flex:1;overflow-y:auto}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.list-status{margin:0;padding:48px 24px;text-align:center;color:var(--color-muted);font-size:14px}.list-status.error{color:var(--color-error)}.conversation-list{list-style:none;margin:0;padding:0}.conversation-item{display:flex;align-items:center;gap:12px;width:100%;padding:12px 16px;background:var(--color-card);border:none;border-bottom:1px solid var(--color-border);cursor:pointer;text-align:left}.conversation-item:active{background:var(--color-bg)}.conversation-item .avatar{flex-shrink:0;border-radius:8px}.conversation-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.conversation-top,.conversation-bottom{display:flex;align-items:center;justify-content:space-between;gap:8px}.conversation-name{font-size:16px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conversation-time{flex-shrink:0;font-size:12px;color:var(--color-muted)}.conversation-preview{flex:1;min-width:0;font-size:13px;color:var(--color-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.unread-badge{flex-shrink:0;min-width:18px;height:18px;padding:0 5px;border-radius:9px;background:var(--color-badge);color:#fff;font-size:12px;line-height:18px;text-align:center}.tabbar{height:var(--tabbar-height);display:flex;border-top:1px solid var(--color-border);background:var(--color-card);position:sticky;bottom:0}.tab{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;text-decoration:none;color:var(--color-muted);font-size:11px}.tab svg{width:24px;height:24px}.tab.active{color:var(--color-primary)}.chat-page{height:100vh;display:flex;flex-direction:column;background:var(--color-bg)}.chat-header{height:var(--header-height);flex-shrink:0;display:flex;align-items:center;gap:8px;padding:0 8px;background:var(--color-card);border-bottom:1px solid var(--color-border)}.chat-header h1{margin:0;font-size:17px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.chat-header .back{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:8px;background:transparent;color:var(--color-text);cursor:pointer}.chat-header .back svg{width:22px;height:22px}.chat-messages{flex:1;overflow-y:auto;padding:16px 12px;display:flex;flex-direction:column;gap:14px;overscroll-behavior:contain}.chat-empty,.history-loading,.chat-error{margin:0;align-self:center;font-size:12px;color:var(--color-muted);text-align:center}.chat-error{color:var(--color-error)}.bubble-row{display:flex;align-items:flex-start;gap:8px;max-width:100%}.bubble-row.mine{flex-direction:row-reverse}.bubble-row .bubble-avatar{flex-shrink:0;border-radius:6px}.bubble-main{display:flex;flex-direction:column;gap:3px;max-width:78%}.bubble-row.mine .bubble-main{align-items:flex-end}.bubble-sender{font-size:12px;color:var(--color-muted);padding:0 2px}.bubble{padding:9px 12px;border-radius:10px;background:var(--color-bubble-other);font-size:15px;line-height:1.45;word-break:break-word;overflow:hidden}.bubble.mine{background:var(--color-primary);color:#fff}.bubble-meta{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--color-muted);padding:0 2px}.ticks{font-size:12px;color:var(--color-muted)}.ticks.read{color:var(--color-primary)}.file-bubble{display:flex;align-items:center;gap:10px;min-width:180px;padding:2px;border:none;background:transparent;cursor:pointer;text-align:left;font-size:inherit;color:inherit}.file-bubble.file-bubble-image{display:block;min-width:0;padding:0}.file-bubble.file-bubble-image img{display:block;max-width:220px;max-height:220px;border-radius:8px;object-fit:cover}.file-hint{font-size:12px;color:var(--color-muted)}.file-bubble:not(.file-bubble-image) .file-icon{width:40px;height:40px;flex-shrink:0;color:var(--color-muted)}.file-bubble:not(.file-bubble-image){color:var(--color-text)}.file-bubble.mine:not(.file-bubble-image){color:#fff}.file-info{display:flex;flex-direction:column;gap:3px;min-width:0}.file-name{font-size:14px;line-height:1.35;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:200px}.file-size{font-size:12px;opacity:.75}.file-bubble.file-bubble-purged{cursor:default}.file-bubble.file-bubble-purged .file-name{color:var(--color-muted)}.upload-progress{display:flex;align-items:center;gap:10px;padding:6px 12px;background:var(--color-card);border-top:1px solid var(--color-border);font-size:13px}.upload-name{max-width:40%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.upload-progress progress{flex:1;height:6px;accent-color:var(--color-primary)}.upload-ratio{color:var(--color-muted);font-variant-numeric:tabular-nums}.upload-error{margin:0;padding:8px 12px;background:var(--color-error-bg);color:var(--color-error);font-size:13px;display:flex;align-items:center;gap:8px}.upload-error .resume{flex-shrink:0;padding:4px 12px;border:none;border-radius:6px;background:var(--color-error);color:#fff;font-size:13px;cursor:pointer}.composer{flex-shrink:0;display:flex;align-items:center;gap:8px;padding:8px 10px;padding-bottom:max(8px,env(safe-area-inset-bottom));background:var(--color-card);border-top:1px solid var(--color-border)}.composer .attach{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:8px;background:transparent;color:var(--color-text);cursor:pointer}.composer .attach svg{width:24px;height:24px}.composer .attach:disabled{opacity:.4;cursor:not-allowed}.composer input[type=text]{flex:1;min-width:0;height:38px;padding:0 12px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-bg);font-size:15px;color:var(--color-text)}.composer input[type=text]:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary)}.composer .send{height:38px;padding:0 16px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.composer .send:disabled{opacity:.5;cursor:not-allowed}.modal-mask{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:16px;background:#0000008c}.modal{width:100%;max-width:760px;max-height:92vh;display:flex;flex-direction:column;background:var(--color-card);border-radius:12px;overflow:hidden}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;border-bottom:1px solid var(--color-border)}.modal-title{font-size:15px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.modal-header .close{flex-shrink:0;width:32px;height:32px;border:none;border-radius:8px;background:transparent;color:var(--color-muted);font-size:16px;cursor:pointer}.modal-header .close:hover{background:var(--color-bg);color:var(--color-text)}.modal-body{flex:1;min-height:320px;display:flex;align-items:center;justify-content:center;overflow:auto;background:var(--color-bg)}.modal-body img{max-width:100%;max-height:78vh;object-fit:contain}.modal-body iframe{width:100%;height:78vh;border:none;background:#fff}.modal-status{margin:0;font-size:14px;color:var(--color-muted)}.modal-unsupported{display:flex;flex-direction:column;align-items:center;gap:14px;padding:24px}.modal-unsupported p{margin:0;font-size:14px;color:var(--color-muted);text-align:center}.modal-unsupported .download{padding:10px 24px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.modal-unsupported .download:hover{background:var(--color-primary-dark)}.avatar-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:8px 0}.avatar-option{display:flex;align-items:center;justify-content:center;padding:6px;border:2px solid transparent;border-radius:12px;background:transparent;cursor:pointer}.avatar-option.selected{border-color:var(--color-primary);background:#07c16014}.page-header .header-action{margin-left:auto;padding:6px 14px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.page-header .header-action:active{background:var(--color-primary-dark)}.page-header .back{display:flex;align-items:center;justify-content:center;width:36px;height:36px;margin-right:4px;border:none;border-radius:8px;background:transparent;color:var(--color-text);cursor:pointer}.page-header .back svg{width:22px;height:22px}.contacts-search{display:flex;gap:8px;padding:12px 16px;border-bottom:1px solid var(--color-border);background:var(--color-card)}.contacts-search input{flex:1;min-width:0;height:38px;padding:0 12px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-bg);font-size:15px;color:var(--color-text)}.contacts-search .search{flex-shrink:0;height:38px;padding:0 16px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.contacts-search .search:disabled{opacity:.5;cursor:not-allowed}.contacts-error{margin:0;padding:10px 16px;background:var(--color-error-bg);color:var(--color-error);font-size:13px}.search-result{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--color-border);background:#07c1600a}.search-result .avatar{border-radius:8px}.search-result-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.search-result-name{font-size:16px;font-weight:500}.search-result-phone,.friend-phone,.admin-user-phone{font-size:13px;color:var(--color-muted)}.search-result .add,.friend-actions .message{flex-shrink:0;padding:7px 16px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.search-result .add:active,.friend-actions .message:active{background:var(--color-primary-dark)}.friend-list{list-style:none;margin:0;padding:0}.friend-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--color-border)}.friend-item .avatar{flex-shrink:0;border-radius:8px}.friend-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.friend-name{font-size:16px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.friend-actions{display:flex;gap:8px;flex-shrink:0}.friend-actions .delete,.group-actions .cancel{padding:7px 14px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-card);color:var(--color-muted);font-size:14px;cursor:pointer}.group-modal{width:100%;max-width:420px;max-height:86vh;overflow-y:auto;display:flex;flex-direction:column;gap:12px;background:var(--color-card);border-radius:12px;padding:16px}.group-modal h2{margin:0;font-size:17px}.group-modal .field input{background:var(--color-card)}.group-members-label{margin:0;font-size:13px;color:var(--color-muted)}.group-members{display:flex;flex-direction:column;gap:4px}.group-member{display:flex;align-items:center;gap:10px;padding:6px 8px;border-radius:8px;font-size:15px;cursor:pointer}.group-member:active{background:var(--color-bg)}.group-member .avatar{border-radius:6px}.group-empty{margin:0;font-size:13px;color:var(--color-muted)}.group-actions{display:flex;justify-content:flex-end;gap:10px}.group-actions .submit{padding:8px 20px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.group-actions .submit:disabled{opacity:.5;cursor:not-allowed}.group-avatar{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;border-radius:8px;background:#5b8def;color:#fff}.group-avatar svg{width:62%;height:62%}.admin-body{padding:0 0 32px;background:var(--color-bg)}.admin-error{margin:12px 16px 0;padding:10px 12px;background:var(--color-error-bg);border-radius:8px;color:var(--color-error);font-size:13px}.admin-section{margin:12px 16px 0;padding:14px 16px;background:var(--color-card);border-radius:12px;display:flex;flex-direction:column;gap:12px}.admin-section h2{margin:0;font-size:15px}.stat-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat-card{display:flex;flex-direction:column;gap:4px;padding:12px;border-radius:10px;background:var(--color-bg)}.stat-value{font-size:20px;font-weight:600;font-variant-numeric:tabular-nums}.stat-label{font-size:12px;color:var(--color-muted)}.invite-form{display:flex;align-items:flex-end;gap:10px}.invite-form .field{flex:1}.invite-form input{background:var(--color-card)}.invite-form .generate{flex-shrink:0;height:38px;padding:0 18px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.invite-form .generate:disabled{opacity:.5;cursor:not-allowed}.invite-list,.admin-users{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}.invite-code-item{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--color-border);font-size:14px}.invite-code-item:last-child,.admin-user-item:last-child{border-bottom:none}.invite-code-item .code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1px;font-weight:500}.invite-code-item .uses{color:var(--color-muted);font-variant-numeric:tabular-nums}.invite-code-item .expiry{flex:1;color:var(--color-muted);font-size:12px}.invite-code-item .copy{flex-shrink:0;padding:5px 12px;border:1px solid var(--color-border);border-radius:6px;background:var(--color-card);color:var(--color-text);font-size:13px;cursor:pointer}.admin-user-item{display:flex;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--color-border)}.admin-user-item .avatar{flex-shrink:0;border-radius:8px}.admin-user-main{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.admin-user-name{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:500}.badge{flex-shrink:0;padding:1px 8px;border-radius:999px;background:var(--color-bg);color:var(--color-muted);font-size:11px;font-weight:400}.badge.admin{background:#5b8def1f;color:#3a6fd8}.badge.disabled{background:var(--color-error-bg);color:var(--color-error)}.admin-user-item .disable{flex-shrink:0;padding:7px 14px;border:none;border-radius:8px;background:var(--color-error);color:#fff;font-size:13px;cursor:pointer}.admin-user-item .reset{margin-left:8px}.me-body{background:var(--color-bg);padding:0 0 32px}.me-profile{display:flex;align-items:center;gap:14px;padding:20px 16px;background:var(--color-card)}.me-profile .avatar{border-radius:12px}.me-profile-main{display:flex;flex-direction:column;gap:4px}.me-nickname{font-size:18px;font-weight:600}.me-phone{font-size:13px;color:var(--color-muted)}.me-section{margin:12px 16px 0;padding:14px 16px;background:var(--color-card);border-radius:12px;display:flex;flex-direction:column;gap:12px}.me-section h2{margin:0;font-size:15px}.nickname-form{display:flex;gap:10px}.nickname-form input{flex:1;min-width:0;height:38px;padding:0 12px;border:1px solid var(--color-border);border-radius:8px;background:var(--color-card);font-size:15px;color:var(--color-text)}.nickname-form .save{flex-shrink:0;height:38px;padding:0 18px;border:none;border-radius:8px;background:var(--color-primary);color:#fff;font-size:14px;cursor:pointer}.nickname-form .save:disabled{opacity:.5;cursor:not-allowed}.notification-row{display:flex;align-items:center;gap:10px;font-size:15px}.notification-row .coming-soon{margin-left:auto;padding:6px 16px;border:none;border-radius:999px;background:var(--color-bg);color:var(--color-muted);font-size:13px;cursor:not-allowed}.notification-row .enable{margin-left:auto;padding:6px 16px;border:none;border-radius:999px;background:var(--color-primary);color:#fff;font-size:13px;cursor:pointer}.notification-row .enable:disabled{opacity:.5;cursor:not-allowed}.coming-soon-hint{font-size:12px;color:var(--color-muted)}.admin-entry,.logout{display:block;padding:12px;border-radius:8px;font-size:15px;text-align:center;text-decoration:none;cursor:pointer}.admin-entry{border:1px solid var(--color-border);background:var(--color-card);color:var(--color-text)}.logout{border:none;background:var(--color-card);color:var(--color-error)}