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ease;flex-shrink:0;box-shadow:3px 3px 6px #a3b1c699,-3px -3px 6px #fffc}.toolbar-btn:hover{color:var(--theme-primary-hover);box-shadow:inset 2px 2px 4px #a3b1c666,inset -2px -2px 4px #ffffffb3}.toolbar-btn:active{color:var(--theme-primary-dark);box-shadow:inset 3px 3px 5px #a3b1c680,inset -3px -3px 5px #fffc}.toolbar-btn:disabled{opacity:.5;cursor:not-allowed;color:#9ca3af;box-shadow:1px 1px 3px #a3b1c64d,-1px -1px 3px #ffffff80}.toolbar-btn svg{width:18px;height:18px;transition:all .15s ease}.toolbar-btn:hover svg{transform:scale(1.08)}.toolbar-btn-guide{background:var(--theme-primary);color:#fff;box-shadow:inset 1px 1px 3px #00000026,inset -1px -1px 3px #ffffff14,0 0 10px rgba(var(--theme-primary-rgb),.25)}.toolbar-btn-guide:hover{background:var(--theme-primary-hover);box-shadow:inset 1px 1px 2px #0000001f,inset -1px -1px 2px #ffffff0d,0 0 15px rgba(var(--theme-primary-rgb),.35)}.word-count{font-size:13px;color:var(--text-secondary);font-family:var(--theme-code-font-family)}.editor-container{flex:1;overflow:hidden;background-color:var(--bg-primary)}.codemirror-wrapper{height:100%}.markdown-editor :deep(.cm-editor){height:100%;font-size:18px}.markdown-editor :deep(.cm-scroller){font-family:var(--theme-code-font-family);line-height:1.7}.markdown-editor :deep(.cm-content){padding:24px;min-height:100%}.markdown-editor :deep(.cm-focused){outline:none}.markdown-editor :deep(.cm-cursor){border-left-color:var(--theme-primary);border-left-width:2px}@media (max-width: 1200px){.toolbar-btn{width:30px;height:30px}.toolbar-btn svg{width:16px;height:16px}.toolbar-divider{margin:0 4px;height:18px}.toolbar-group{gap:1px}}@media (max-width: 768px){.editor-toolbar{padding:6px 8px;min-height:44px}.toolbar-btn{width:28px;height:28px;border-radius:6px}.toolbar-btn svg{width:14px;height:14px}.toolbar-divider{margin:0 3px;height:16px}.markdown-editor :deep(.cm-content){padding:16px}}.markdown-editor :deep(.cm-header-1){color:var(--theme-primary)}.markdown-editor :deep(.cm-header-2){color:var(--theme-primary-dark)}.markdown-editor :deep(.cm-header-3){color:var(--theme-text-primary)}.markdown-editor :deep(.cm-header-4){color:var(--theme-text-secondary)}.markdown-editor :deep(.cm-header-5){color:var(--theme-text-secondary)}.markdown-editor :deep(.cm-header-6){color:var(--theme-text-tertiary)}.markdown-editor :deep(.cm-strong){font-weight:700}.markdown-editor :deep(.cm-em){font-style:italic}.markdown-editor :deep(.cm-strikethrough){text-decoration:line-through}.markdown-editor :deep(.cm-link){color:var(--theme-primary);text-decoration:underline}.markdown-editor :deep(.cm-quote){color:var(--theme-text-secondary);font-style:italic}.markdown-editor :deep(.cm-comment){color:var(--theme-text-tertiary)}.markdown-editor :deep(.cm-keyword){color:var(--theme-primary)}.markdown-editor :deep(.cm-string){color:var(--theme-primary-dark)}.markdown-editor :deep(.cm-number){color:var(--theme-primary)}.markdown-editor :deep(.cm-atom){color:var(--theme-primary)}.markdown-editor :deep(.cm-property){color:var(--theme-primary-hover)}.markdown-editor :deep(.cm-def){color:var(--theme-primary-dark)}.markdown-editor :deep(.cm-variable){color:var(--theme-primary-hover)}.markdown-editor :deep(.cm-operator){color:var(--theme-primary)}.markdown-editor :deep(.cm-meta){color:var(--theme-primary-dark)}.markdown-editor :deep(.cm-tag){color:var(--theme-primary)}.markdown-editor :deep(.cm-attribute){color:var(--theme-primary-dark)}.preview-pane{display:flex;flex-direction:column;height:100%;overflow:hidden}.preview-toolbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:var(--theme-bg-secondary);border-bottom:1px solid var(--theme-border-light);flex-shrink:0}.preview-mode-selector{display:flex;align-items:center;gap:12px}.mode-label{font-size:13px;font-weight:500;color:var(--theme-text-secondary);margin:0}.mode-buttons{display:flex;background:#e8e8eb;border-radius:12px;padding:4px;box-shadow:inset 4px 4px 8px #a3b1c699,inset -4px -4px 8px #ffffffe6;position:relative;gap:0}.mode-btn{display:flex;align-items:center;justify-content:center;gap:0;padding:10px 12px;border:none;background:transparent;cursor:pointer;font-size:13px;font-weight:500;color:#9ca3af;transition:all .2s ease;white-space:nowrap;position:relative;border-radius:8px;margin:0;min-width:44px;flex:1}.mode-btn:first-child{border-radius:8px 4px 4px 8px}.mode-btn:last-child{border-radius:4px 8px 8px 4px}.mode-btn:not(:first-child):not(:last-child){border-radius:4px}.mode-btn:hover:not(.active){color:var(--theme-primary);background:#ffffff4d}.mode-btn.active{background:linear-gradient(145deg,#fff,#f8f9fa);color:var(--theme-primary);font-weight:600;box-shadow:3px 3px 6px #a3b1c680,-3px -3px 6px #ffffffe6,inset 0 1px #fffffff2,inset 0 -1px #00000014;transform:translateY(-1px)}.mode-btn.active:hover{color:var(--theme-primary-hover);background:linear-gradient(145deg,#fff,#fafbfc);box-shadow:4px 4px 8px #a3b1c699,-4px -4px 8px #fffffff2,inset 0 1px #fffffffa,inset 0 -1px #0000001a}.mode-icon{flex-shrink:0;transition:all .2s ease;opacity:.7;width:18px;height:18px}.mode-btn:hover .mode-icon{opacity:.9}.mode-btn.active .mode-icon{opacity:1;color:var(--theme-primary)}.mode-btn.active:before{content:"";position:absolute;top:1px;left:2px;right:2px;height:50%;background:linear-gradient(180deg,rgba(255,255,255,.8) 0%,rgba(255,255,255,.3) 50%,transparent 100%);border-radius:6px 6px 12px 12px;pointer-events:none}.mode-btn:not(:last-child):after{content:"";position:absolute;top:20%;right:0;width:1px;height:60%;background:linear-gradient(180deg,transparent 0%,rgba(163,177,198,.3) 20%,rgba(163,177,198,.3) 80%,transparent 100%)}.mode-btn.active:after,.mode-btn.active+.mode-btn:after{display:none}.viewport-info{display:flex;align-items:center;gap:8px}.viewport-size{font-size:12px;color:var(--theme-text-tertiary);font-family:SF Mono,Monaco,Consolas,monospace;background:var(--theme-bg-primary);padding:4px 8px;border-radius:var(--radius-sm);border:1px solid var(--theme-border-light)}.preview-container{flex:1;display:flex;justify-content:center;overflow:hidden;position:relative}.preview-rendered{width:100%;overflow-y:auto;border:none;background:var(--theme-bg-primary);transition:all var(--transition-normal)}.viewport-desktop .preview-rendered{max-width:none;margin:0;border-left:none!important;border-right:none!important}.viewport-tablet .preview-rendered{max-width:768px;margin:20px auto;border:1px solid var(--theme-border-light);border-radius:16px;box-shadow:0 8px 32px #0000001f;padding:32px;position:relative}.viewport-tablet .preview-rendered:before{content:"";position:absolute;top:12px;left:50%;transform:translate(-50%);width:120px;height:4px;background:var(--theme-border-light);border-radius:2px}.viewport-tablet .preview-rendered:after{content:"";position:absolute;bottom:8px;left:50%;transform:translate(-50%);width:80px;height:4px;background:var(--theme-border-light);border-radius:2px}.viewport-mobile .preview-rendered{max-width:375px;margin:0 auto;border-left:1px solid var(--theme-border-light);border-right:1px solid var(--theme-border-light);box-shadow:var(--shadow-md)}.preview-html{flex:1;display:flex;flex-direction:column;padding:16px}.html-textarea,.html-code-viewer{flex:1;width:100%;padding:20px;font-family:var(--theme-code-font-family);font-size:14px;line-height:1.6;background-color:var(--code-bg);color:var(--code-color);border:1px solid var(--code-border);border-radius:var(--radius-lg);white-space:pre-wrap;word-wrap:break-word}.html-textarea{border:none;outline:none;resize:none}.html-code-viewer{overflow:auto}.html-placeholder{color:var(--theme-text-tertiary);font-style:italic;text-align:center;padding:40px 20px}.preview-rendered :deep(.error){background:var(--theme-bg-tertiary);border:1px solid var(--theme-border-medium);color:var(--theme-text-secondary);padding:16px;border-radius:var(--radius-md);margin:16px 0}@media (max-width: 768px){.html-textarea{font-size:12px;padding:16px}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,#0006,#0009);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:20px}.modal-container{background:var(--theme-bg-primary);border-radius:20px;max-width:1000px;width:100%;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 32px 64px #0000001f,0 0 0 1px #ffffff0d;overflow:hidden;border:1px solid var(--theme-border-light)}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:32px 40px;background:linear-gradient(135deg,var(--theme-bg-primary),var(--theme-bg-secondary));border-bottom:1px solid var(--theme-border-light)}.header-content{display:flex;align-items:center;gap:16px}.header-icon{display:flex;align-items:center;justify-content:center;width:48px;height:48px;background:linear-gradient(135deg,var(--theme-primary),var(--theme-primary-hover));border-radius:12px;color:#fff;box-shadow:0 8px 16px #0000001a}.header-text h2{margin:0 0 4px;font-size:28px;font-weight:700;color:var(--theme-text-primary);background:linear-gradient(135deg,var(--theme-text-primary),var(--theme-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-text p{margin:0;font-size:14px;color:var(--theme-text-secondary);font-weight:500}.close-btn{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:none;background:var(--theme-bg-tertiary);border-radius:12px;cursor:pointer;color:var(--theme-text-secondary);transition:all .2s ease;border:1px solid var(--theme-border-light)}.close-btn:hover{background:var(--theme-bg-secondary);color:var(--theme-text-primary);transform:scale(1.05)}.modal-body{flex:1;overflow-y:auto;padding:40px;background:var(--theme-bg-primary)}.guide-sections{display:flex;flex-direction:column;gap:48px}.guide-section{position:relative}.section-header{display:flex;align-items:center;gap:12px;margin-bottom:24px;padding-bottom:16px;border-bottom:2px solid var(--theme-border-light)}.section-icon{display:flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,var(--theme-primary),var(--theme-primary-hover));border-radius:10px;color:#fff;box-shadow:0 4px 12px #0000001a}.section-header h3{margin:0;font-size:22px;font-weight:700;color:var(--theme-text-primary);letter-spacing:-.5px}.syntax-list{display:flex;flex-direction:column;gap:16px}.syntax-item{display:grid;grid-template-columns:1fr 1fr;gap:24px;background:var(--theme-bg-secondary);border:1px solid var(--theme-border-light);border-radius:12px;padding:24px;transition:all .3s ease;box-shadow:0 2px 8px #0000000d}.syntax-item:hover{transform:translateY(-1px);box-shadow:0 4px 16px #0000001a;border-color:var(--theme-primary)}.syntax-left{display:flex;flex-direction:column;gap:12px}.syntax-left h4{margin:0;font-size:16px;font-weight:600;color:var(--theme-text-primary);display:flex;align-items:center;gap:8px}.syntax-left h4:before{content:"";width:4px;height:16px;background:linear-gradient(135deg,var(--theme-primary),var(--theme-primary-hover));border-radius:2px}.syntax-right{display:flex;align-items:center;background:var(--theme-bg-primary);border:1px solid var(--theme-border-light);border-radius:8px;padding:16px;min-height:60px;box-shadow:inset 0 1px 3px #0000000d}.syntax-left code{background:var(--theme-code-bg);color:var(--theme-code-text);padding:16px 20px;border-radius:8px;font-family:var(--theme-code-font-family);font-size:13px;line-height:1.6;border:1px solid var(--theme-code-border);box-shadow:0 2px 8px #0000000d;position:relative;overflow-x:auto;white-space:pre-line;display:block}.syntax-left code:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(135deg,var(--theme-primary),var(--theme-primary-hover));border-radius:0 2px 2px 0}.demo-h1,.demo-h2,.demo-h3{margin:8px 0;font-weight:700;color:var(--theme-text-primary);line-height:1.3}.demo-h1{font-size:24px;background:linear-gradient(135deg,var(--theme-text-primary),var(--theme-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.demo-h2{font-size:20px}.demo-h3{font-size:18px}.demo-quote{margin:12px 0;padding:16px 20px;border-left:4px solid var(--theme-primary);background:var(--theme-bg-tertiary);border-radius:0 8px 8px 0;color:var(--theme-text-secondary);font-style:italic;position:relative}.demo-quote:before{content:'"';position:absolute;left:8px;top:8px;font-size:24px;color:var(--theme-primary);font-weight:700}.demo-code{background:var(--theme-code-bg);color:var(--theme-code-text);padding:4px 8px;border-radius:6px;font-family:var(--theme-code-font-family);font-size:13px;border:1px solid var(--theme-code-border);box-shadow:0 1px 3px #0000001a}.demo-list{margin:12px 0;padding-left:24px;color:var(--theme-text-primary)}.demo-list li{margin:8px 0;line-height:1.5}.demo-list ul{margin-top:8px;padding-left:20px}.demo-task-list{list-style:none;padding-left:0;margin:12px 0}.demo-task-list li{margin:8px 0;padding-left:24px;position:relative;color:var(--theme-text-primary)}.demo-task-list .task-done{color:var(--theme-primary)}.demo-task-list .task-todo{color:var(--theme-text-secondary)}.demo-link{color:var(--theme-primary);text-decoration:none;font-weight:500;border-bottom:1px solid transparent;transition:all .2s ease}.demo-link:hover{border-bottom-color:var(--theme-primary)}.demo-image{display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px;background:var(--theme-bg-tertiary);border:2px dashed var(--theme-border-medium);border-radius:8px;color:var(--theme-text-secondary)}.demo-code-block{background:var(--theme-code-bg);color:var(--theme-code-text);padding:16px 20px;border-radius:8px;font-family:var(--theme-code-font-family);font-size:14px;line-height:1.6;border:1px solid var(--theme-code-border);box-shadow:0 2px 8px #0000000d;margin:12px 0;overflow-x:auto}.demo-hr{border:none;height:3px;background:linear-gradient(90deg,transparent,var(--theme-primary),transparent);margin:20px 0;border-radius:2px;width:100%;opacity:.8}.syntax-right .demo-hr{margin:16px 0;height:2px;background:linear-gradient(90deg,var(--theme-border-light),var(--theme-primary),var(--theme-border-light));box-shadow:0 1px 2px #0000001a}.demo-table{border-collapse:collapse;margin:12px 0;width:100%;font-size:14px;border:1px solid var(--theme-border-light);border-radius:8px;overflow:hidden;box-shadow:0 2px 8px #0000000d}.demo-table th,.demo-table td{border:1px solid var(--theme-border-light);padding:12px 16px;text-align:left}.demo-table th{background:linear-gradient(135deg,var(--theme-bg-secondary),var(--theme-bg-tertiary));font-weight:600;color:var(--theme-text-primary);font-size:13px;text-transform:uppercase;letter-spacing:.5px}.demo-table td{background:var(--theme-bg-primary);color:var(--theme-text-primary)}.demo-table tr:hover td{background:var(--theme-bg-secondary)}.demo-math-inline{font-family:var(--theme-code-font-family);font-style:italic;color:var(--theme-text-primary)}.demo-math-block{text-align:center;padding:16px 0;width:100%}.demo-math-block .math-formula{font-family:var(--theme-code-font-family);font-style:italic;font-size:18px;color:var(--theme-text-primary);letter-spacing:1px}.syntax-item-full{grid-template-columns:1fr!important}.math-help{display:flex;flex-wrap:wrap;align-items:center;gap:12px;padding:12px 16px;background:var(--theme-bg-tertiary);border-radius:8px;border:1px dashed var(--theme-border-medium)}.math-help p{margin:0;color:var(--theme-text-secondary);font-size:14px}.math-help .demo-link{font-size:14px;padding:4px 12px;background:var(--theme-primary);color:#fff;border-radius:6px;transition:all .2s ease}.math-help .demo-link:hover{background:var(--theme-primary-hover);transform:translateY(-1px)}.modal-enter-active,.modal-leave-active{transition:all .4s cubic-bezier(.4,0,.2,1)}.modal-enter-from,.modal-leave-to{opacity:0}.modal-enter-from .modal-container,.modal-leave-to .modal-container{transform:scale(.95) translateY(20px)}@media (max-width: 1024px){.syntax-item{grid-template-columns:1fr;gap:16px}.syntax-right{min-height:50px}}@media (max-width: 768px){.modal-overlay{padding:0}.modal-container{max-width:100%;max-height:100%;border-radius:0;margin:0}.modal-header{padding:24px 20px}.header-content{gap:12px}.header-icon{width:40px;height:40px}.header-text h2{font-size:24px}.modal-body{padding:24px 20px}.guide-sections{gap:32px}.section-header{gap:10px;margin-bottom:20px}.section-icon{width:32px;height:32px}.section-header h3{font-size:20px}.syntax-list{gap:12px}.syntax-item{padding:20px;gap:12px}.syntax-left h4{font-size:15px}.syntax-left code{padding:12px 16px;font-size:12px}.syntax-right{padding:12px;min-height:40px}}@media (max-width: 480px){.header-text h2{font-size:20px}.header-text p{font-size:13px}.section-header h3{font-size:18px}.card-header h4{font-size:15px}.syntax-code code{font-size:12px;padding:10px 12px}.demo-h1{font-size:20px}.demo-h2{font-size:18px}.demo-h3{font-size:16px}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-md);padding:var(--spacing-lg) var(--spacing-2xl);border-radius:var(--radius-2xl);border:none;font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);cursor:pointer;transition:var(--transition-all-normal);text-decoration:none;white-space:nowrap;background:var(--gray-100);color:var(--theme-primary);box-shadow:var(--shadow-neumorphism-raised);position:relative}.btn:hover:not(:disabled){color:var(--theme-primary-hover);font-weight:var(--font-weight-bold);box-shadow:var(--shadow-neumorphism-pressed)}.btn:active:not(:disabled){color:var(--theme-primary-dark);box-shadow:inset var(--spacing-xs) var(--spacing-xs) var(--spacing-md) #a3b1c680,inset calc(-1 * var(--spacing-xs)) calc(-1 * var(--spacing-xs)) var(--spacing-md) #ffffffe6}.btn:disabled{opacity:.5;cursor:not-allowed;color:var(--gray-400);box-shadow:var(--shadow-xs)}.btn-small{display:inline-flex;align-items:center;justify-content:center;width:var(--spacing-toolbar);height:var(--spacing-toolbar);border:none;border-radius:var(--radius-xl);background:var(--gray-100);cursor:pointer;font-size:var(--font-size-base);transition:var(--transition-all-normal);color:var(--theme-primary);box-shadow:var(--shadow-neumorphism-small)}.btn-small:hover{color:var(--theme-primary-hover);box-shadow:inset var(--spacing-xs) var(--spacing-xs) var(--spacing-xs) #a3b1c64d,inset calc(-1 * var(--spacing-xs)) calc(-1 * var(--spacing-xs)) var(--spacing-xs) #ffffffb3}.btn-small:active{color:var(--theme-primary-dark);box-shadow:inset var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) #a3b1c666,inset calc(-1 * var(--spacing-sm)) calc(-1 * var(--spacing-sm)) var(--spacing-sm) #fffc}.btn-primary{background:var(--theme-primary);color:#fff;font-weight:700;box-shadow:inset 2px 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