:root{--bg-base: #f5f7fa;--bg-card: #ffffff;--bg-card-hover: #fafbfc;--bg-header: #ffffff;--bg-nav: #ffffff;--color-primary: #1677ff;--color-primary-hover: #0958d9;--color-danger: #ff4d4f;--color-danger-hover: #d9363e;--color-success: #52c41a;--text-primary: #1a1a1a;--text-secondary: #595959;--text-muted: #8c8c8c;--text-placeholder: #bfbfbf;--border-color: #e0e4e8;--border-radius-sm: 6px;--border-radius-md: 8px;--border-radius-lg: 12px;--border-radius-full: 9999px;--shadow-card: 0 1px 3px rgba(0, 0, 0, .06);--shadow-card-hover: 0 4px 12px rgba(0, 0, 0, .1);--shadow-header: 0 1px 0 var(--border-color);--shadow-fab: 0 4px 12px rgba(22, 119, 255, .35);--font-ui: -apple-system, BlinkMacSystemFont, "PingFang TC", "Microsoft JhengHei", "Segoe UI", sans-serif;--transition: .15s ease;--header-h: 54px;--bottom-nav-h: 58px;--safe-top: env(safe-area-inset-top, 0px);--safe-bot: env(safe-area-inset-bottom, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-ui);background-color:var(--bg-base);color:var(--text-primary);min-height:100dvh;-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer;border:none;background:none}input,textarea{font-family:inherit}a{color:inherit;text-decoration:none}ul{list-style:none}#root{display:flex;flex-direction:column;min-height:100dvh}.app-layout{display:flex;flex-direction:column;min-height:100dvh;padding-top:calc(var(--header-h) + var(--safe-top));padding-bottom:calc(var(--bottom-nav-h) + var(--safe-bot))}.app-main{flex:1;display:flex;flex-direction:column}.app-header{position:fixed;top:0;left:0;right:0;height:calc(var(--header-h) + var(--safe-top));padding-top:var(--safe-top);background:var(--bg-header);border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding-left:16px;padding-right:16px;gap:12px;z-index:100;box-shadow:var(--shadow-header)}.app-header__logo{font-size:16px;font-weight:700;color:var(--text-primary);white-space:nowrap;letter-spacing:-.01em}.search-bar{flex:1;position:relative;min-width:0}.search-bar input{width:100%;background:var(--bg-base);border:1px solid var(--border-color);border-radius:var(--border-radius-full);padding:7px 32px 7px 34px;color:var(--text-primary);font-size:14px;outline:none;transition:border-color var(--transition),box-shadow var(--transition)}.search-bar input::placeholder{color:var(--text-placeholder)}.search-bar input:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #1677ff1f;background:#fff}.search-bar__icon{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--text-muted);pointer-events:none}.search-bar__clear{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:18px;height:18px;border-radius:50%;background:var(--text-muted);color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;opacity:.7;transition:opacity var(--transition)}.search-bar__clear:hover{opacity:1}.category-filter{display:flex;gap:8px;padding:10px 16px;overflow-x:auto;scrollbar-width:none;background:#fff;border-bottom:1px solid var(--border-color)}.category-filter::-webkit-scrollbar{display:none}.category-filter__chip{flex-shrink:0;padding:4px 14px;border-radius:var(--border-radius-full);font-size:13px;font-weight:500;border:1px solid var(--border-color);color:var(--text-secondary);background:#fff;transition:all var(--transition);white-space:nowrap}.category-filter__chip:hover{border-color:var(--color-primary);color:var(--color-primary)}.category-filter__chip.category-filter__chip--active{background:var(--color-primary);border-color:var(--color-primary);color:#fff!important}.reply-list{flex:1;padding:12px 12px 80px;display:flex;flex-direction:column;gap:8px}.reply-list--empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--text-muted);padding:40px 20px;text-align:center}.reply-list--empty .empty-icon{font-size:48px}.reply-list--empty h3{font-size:15px;color:var(--text-secondary)}.reply-list--empty p{font-size:13px}.reply-card-wrapper{transition:transform .15s ease}.reply-card-wrapper--over{border-top:2px solid var(--color-primary);padding-top:2px}.reply-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-md);padding:8px 10px;transition:box-shadow var(--transition),border-color var(--transition),opacity var(--transition);box-shadow:var(--shadow-card);display:flex;flex-direction:column;gap:4px}.reply-card:hover{box-shadow:var(--shadow-card-hover);border-color:#c9d4df}.reply-card--dragging{opacity:.5;box-shadow:var(--shadow-card-hover);border-color:var(--color-primary)}.reply-card__row1{display:flex;align-items:center;gap:6px}.reply-card__drag-handle{flex-shrink:0;width:22px;height:22px;display:flex;align-items:center;justify-content:center;cursor:grab;color:var(--text-muted);font-size:16px;line-height:1;border-radius:4px;touch-action:none;user-select:none;-webkit-user-select:none;transition:color var(--transition),background var(--transition)}.reply-card__drag-handle:hover{color:var(--text-secondary);background:var(--bg-base)}.reply-card__drag-handle:active{cursor:grabbing;color:var(--color-primary)}.reply-card__group{flex:1;font-size:12px;font-weight:600;color:var(--color-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.btn-copy-sm{flex-shrink:0;padding:3px 10px;border-radius:var(--border-radius-full);background:var(--color-primary);border:none;color:#fff;font-size:12px;font-weight:600;white-space:nowrap;transition:background var(--transition),transform var(--transition)}.btn-copy-sm:hover{background:var(--color-primary-hover)}.btn-copy-sm:active{transform:scale(.95)}.btn-copy-sm--copied{background:var(--color-success)}.reply-card__row2{display:flex;align-items:center;gap:6px;padding-left:28px}.reply-card__content-inline{flex:1;min-width:0;font-size:13px;color:var(--text-secondary);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reply-card__row2-actions{flex-shrink:0;display:flex;gap:4px}.btn-icon-sm{width:28px;height:28px;border-radius:var(--border-radius-sm);display:flex;align-items:center;justify-content:center;font-size:13px;border:1px solid var(--border-color);color:var(--text-muted);background:#fff;transition:all var(--transition);flex-shrink:0}.btn-icon-sm:hover{border-color:var(--color-primary);color:var(--color-primary);background:#1677ff0d}.btn-icon-sm--delete:hover{border-color:var(--color-danger);color:var(--color-danger);background:#ff4d4f0d}.fab{position:fixed;bottom:calc(var(--bottom-nav-h) + var(--safe-bot) + 16px);right:18px;width:52px;height:52px;border-radius:50%;background:var(--color-primary);border:none;color:#fff;font-size:24px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-fab);z-index:90;transition:transform var(--transition),box-shadow var(--transition),background var(--transition)}.fab:hover{background:var(--color-primary-hover);transform:scale(1.06)}.fab:active{transform:scale(.94)}.form-page{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--bg-base);z-index:200;display:flex;flex-direction:column;animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(16px);opacity:0}to{transform:translateY(0);opacity:1}}.form-page__header{display:flex;align-items:center;gap:12px;padding:calc(var(--safe-top) + 12px) 16px 12px;border-bottom:1px solid var(--border-color);background:var(--bg-header)}.form-page__title{font-size:16px;font-weight:700;flex:1;color:var(--text-primary)}.form-page__body{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:16px}.form-group{display:flex;flex-direction:column;gap:6px}.form-group label{font-size:13px;font-weight:600;color:var(--text-secondary)}.required-star{color:var(--color-danger);margin-left:2px}.form-control{width:100%;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-sm);padding:10px 12px;color:var(--text-primary);font-size:15px;outline:none;resize:none;transition:border-color var(--transition),box-shadow var(--transition)}.form-control::placeholder{color:var(--text-placeholder)}.form-control:focus{border-color:var(--color-primary);box-shadow:0 0 0 2px #1677ff1f}.form-control--error{border-color:var(--color-danger)!important}.form-char-count{display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--text-muted);margin-top:4px}.form-char-count--warn{color:var(--color-danger);font-weight:600}.form-error{font-size:12px;color:var(--color-danger)}.category-suggestions{display:flex;flex-wrap:wrap;gap:6px;margin-top:2px}.category-suggestions button{font-size:12px;padding:3px 10px;border-radius:var(--border-radius-full);border:1px solid var(--border-color);color:var(--text-secondary);background:var(--bg-card);transition:all var(--transition)}.category-suggestions button:hover{border-color:var(--color-primary);color:var(--color-primary)}.form-page__footer{padding:12px 16px calc(var(--safe-bot) + 12px);display:flex;gap:10px;border-top:1px solid var(--border-color);background:var(--bg-header)}.btn-primary{flex:1;padding:11px;border-radius:var(--border-radius-sm);background:var(--color-primary);border:none;color:#fff;font-size:15px;font-weight:600;transition:background var(--transition)}.btn-primary:hover{background:var(--color-primary-hover)}.btn-primary:disabled{opacity:.4;cursor:not-allowed}.btn-secondary{padding:11px 20px;border-radius:var(--border-radius-sm);background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);font-size:15px;font-weight:500;transition:all var(--transition)}.btn-secondary:hover{border-color:var(--color-primary);color:var(--color-primary)}.toast-wrapper{position:fixed;bottom:calc(var(--bottom-nav-h) + var(--safe-bot) + 72px);left:50%;transform:translate(-50%);z-index:500;display:flex;flex-direction:column;align-items:center;gap:8px;pointer-events:none}.toast{padding:9px 20px;border-radius:var(--border-radius-full);font-size:13px;font-weight:600;color:#fff;background:#1e1e1ee6;box-shadow:0 4px 16px #00000026;animation:toastIn .2s ease,toastOut .2s ease 1.7s forwards;white-space:nowrap}.toast--error{background:#ff4d4fe6}@keyframes toastIn{0%{opacity:0;transform:translateY(8px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes toastOut{0%{opacity:1}to{opacity:0}}.dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;z-index:400;display:flex;align-items:flex-end;justify-content:center;padding-bottom:calc(var(--safe-bot) + 16px);animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.dialog-box,.copy-fallback__box{width:100%;max-width:480px;margin:0 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:22px 18px 18px;animation:sheetUp .2s ease;box-shadow:0 8px 32px #0000001f}@keyframes sheetUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.dialog-box h3,.copy-fallback__box h3{font-size:16px;font-weight:700;margin-bottom:8px}.dialog-box p,.copy-fallback__box p{font-size:14px;color:var(--text-secondary);margin-bottom:18px;line-height:1.6}.dialog-box__actions{display:flex;gap:8px}.btn-danger{flex:1;padding:11px;border-radius:var(--border-radius-sm);background:var(--color-danger);border:none;color:#fff;font-size:15px;font-weight:600;transition:background var(--transition)}.btn-danger:hover{background:var(--color-danger-hover)}.copy-fallback{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:450;display:flex;align-items:flex-end;justify-content:center;padding:16px;padding-bottom:calc(var(--safe-bot) + 16px)}.copy-fallback__text{width:100%;background:var(--bg-base);border:1px solid var(--border-color);border-radius:var(--border-radius-sm);padding:10px 12px;color:var(--text-primary);font-size:14px;line-height:1.6;resize:none;margin-bottom:12px;min-height:90px}.settings-page{padding:16px}.settings-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-md);overflow:hidden;margin-bottom:16px;box-shadow:var(--shadow-card)}.settings-section__title{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);padding:10px 14px 6px}.settings-row{display:flex;align-items:center;padding:13px 14px;border-top:1px solid var(--border-color);gap:12px;cursor:pointer;transition:background var(--transition)}.settings-row:first-of-type{border-top:none}.settings-row:hover{background:var(--bg-base)}.settings-row__icon{font-size:18px;width:26px;text-align:center}.settings-row__label{flex:1;font-size:15px}.settings-row__label--danger{color:var(--color-danger)}.settings-row__arrow{color:var(--text-muted);font-size:13px}.settings-info{font-size:13px;color:var(--text-muted);text-align:center;padding:6px 16px 16px;line-height:1.8}.bottom-nav{position:fixed;bottom:0;left:0;right:0;height:calc(var(--bottom-nav-h) + var(--safe-bot));padding-bottom:var(--safe-bot);background:var(--bg-nav);border-top:1px solid var(--border-color);display:flex;z-index:100;box-shadow:0 -1px 0 var(--border-color)}.bottom-nav__item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;color:var(--text-muted);font-size:10px;font-weight:500;transition:color var(--transition)}.bottom-nav__item:hover,.bottom-nav__item--active{color:var(--color-primary)}.bottom-nav__icon{font-size:20px}.loading-screen{flex:1;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;min-height:200px;color:var(--text-muted);font-size:14px}.spinner{width:28px;height:28px;border:2px solid var(--border-color);border-top-color:var(--color-primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}