:root{--primary-color: #1a4e8a;--primary-light: #5d89b3;--primary-dark: #0d2e56;--secondary-color: #f5f7fa;--bg-color: #f8fbff;--text-color: #1a3149;--light-text: #6a869f;--card-bg: #ffffff;--border-radius: 8px;--shadow: 0 8px 20px rgba(26, 78, 138, .1);--header-height: 120px;--transition: all .3s ease;--border-color: #cce0f5;--container-max-width: 1400px;--primary-50: #f0f7ff;--primary-100: #e0f0fe;--primary-200: #bae0fd;--primary-300: #7cc6fa;--primary-400: #36a9f0;--primary-500: #1a8cd8;--primary-600: #1a70b8;--primary-700: #1a5896;--primary-800: #1a4e8a;--primary-900: #0f3b70;--ceramic-white: #f9fcff;--ceramic-off-white: #f2f8ff;--ceramic-cream: #fffcf5;--accent-light: #cee8ff;--accent-dark: #003b80}#root{width:100%;display:flex;flex-direction:column}body{margin:0;padding:0;font-family:"Noto Serif SC",Inter,-apple-system,BlinkMacSystemFont,serif;background-color:var(--ceramic-white);color:var(--primary-800);background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' 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d='M0,10 C10,0 15,0 25,10 C35,20 40,20 50,10 C60,0 65,0 75,10 C85,20 90,20 100,10 L100,20 L0,20 Z' fill='%231a4e8a'/%3E%3C/svg%3E")}.ceramic-cloud{width:150px;height:60px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 40'%3E%3Cpath d='M10,30 C15,40 30,40 40,30 C50,40 70,40 80,30 C90,40 95,35 98,30 C95,25 90,25 85,30 C75,20 65,20 60,30 C50,20 30,20 20,30 C15,25 5,25 2,30 C5,35 8,35 10,30 Z' fill='%231a4e8a'/%3E%3C/svg%3E")}.app-header{background-color:var(--ceramic-white);background-image:linear-gradient(to bottom,var(--ceramic-white),var(--ceramic-off-white));color:var(--primary-800);padding:24px 40px;position:relative;min-height:460px;overflow:hidden;border-bottom:1px solid var(--accent-light)}.header-content h1{font-size:2.4rem;margin-bottom:8px;font-weight:700;color:var(--primary-800)}.header-content p{font-size:1.1rem;margin-bottom:16px;color:var(--light-text);max-width:700px;line-height:1.6}.header-badges{display:flex;gap:12px;justify-content:center}.badge{background-color:#1a4e8a1a;padding:4px 12px;border-radius:20px;font-size:.85rem;color:var(--primary-800);border:1px solid rgba(26,78,138,.2)}.badge-tech{background-color:var(--ceramic-off-white);color:var(--primary-700);border:1px solid var(--accent-light);transition:all .3s ease}.badge-tech:hover{background-color:var(--primary-50);transform:translateY(-2px);box-shadow:0 4px 8px #003b801a}@keyframes float{0%{transform:translateY(0) translate(0) rotate(0)}25%{transform:translateY(-10px) translate(10px) rotate(5deg)}50%{transform:translateY(0) translate(20px) rotate(0)}75%{transform:translateY(10px) translate(10px) rotate(-5deg)}to{transform:translateY(0) translate(0) rotate(0)}}.app-main{display:flex;flex:1;padding:24px;gap:24px;height:calc(100vh - var(--header-height) - 48px);background-color:var(--bg-color);overflow:hidden}body:not(.mobile-layout) .app-main{display:flex!important;flex-direction:row!important}.desktop-layout{display:flex!important;width:100%!important;height:100%!important;flex-direction:row!important;position:relative}body.desktop-layout .app-main{display:flex!important;flex-direction:row!important}.left-panel-resizable{height:100%!important;position:relative;min-width:300px}.resize-handle{position:absolute;width:5px!important;height:100%!important;right:0;top:0;background-color:#e0e0e0;transition:background-color .2s;cursor:col-resize!important;z-index:10}.resize-handle:hover,.resize-handle:active,.resize-handle.resizing{background-color:var(--primary-500)!important;opacity:.8}.desktop-layout .right-panel{flex:1;position:relative;overflow:hidden;border:1px solid var(--border-color);background:var(--card-bg);height:100%;transition:width .15s ease-out}.desktop-layout .left-panel{flex:1!important;display:flex!important;flex-direction:column!important;overflow:hidden!important;border:1px solid var(--border-color)!important;height:100%!important;background:var(--card-bg)!important;border-radius:var(--border-radius)!important;box-shadow:var(--shadow)!important;min-width:300px!important;width:100%!important}.desktop-layout .right-panel{flex:1!important;height:100%!important;min-width:300px!important}.desktop-layout .panel-content{flex:1;overflow:auto;display:flex;flex-direction:column}.desktop-layout #markdown-input{flex:1;overflow:auto;min-height:300px}.resizable-panel{display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--border-color);height:100%;background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow)}.panel-header{padding:16px 20px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;background-color:#1a4e8a0d;flex-shrink:0}.panel-header h2{margin:0;font-size:1.25rem;font-weight:600;color:var(--primary-800)}.info-icon{color:var(--light-text);cursor:pointer;font-size:18px;transition:var(--transition)}.info-icon:hover{color:var(--primary-800)}.preview-panel{display:flex;flex-direction:column;overflow:hidden;border:1px solid var(--border-color);background-color:#fff!important;height:100%;flex:1;box-shadow:var(--shadow)}.preview-actions{display:flex;gap:12px}.settings-button{background-color:#1890ff;border-color:#1890ff}.settings-button:hover{background-color:#40a9ff;border-color:#40a9ff}.export-button{background-color:#52c41a;border-color:#52c41a}.export-button:hover{background-color:#73d13d;border-color:#73d13d}.settings-modal .ant-modal-content{border-radius:var(--border-radius);overflow:hidden;border:1px solid var(--border-color)}.settings-modal .ant-tabs-nav{margin-bottom:20px}.settings-modal .ant-tabs-tab{padding:12px 20px;color:var(--light-text)}.settings-modal .ant-tabs-tab-active{font-weight:600;color:var(--primary-800)}.settings-modal .ant-tabs-ink-bar{background-color:var(--primary-800)}.help-button{background-color:var(--primary-light);border-color:var(--primary-light);display:flex;align-items:center;gap:5px;padding:5px 12px;transition:all .3s}.help-button:hover{background-color:var(--primary-color);border-color:var(--primary-color);transform:translateY(-1px);box-shadow:0 2px 8px #1a4e8a33}.markdown-help-modal .ant-modal-content{border-radius:var(--border-radius);overflow:hidden;border:1px solid var(--border-color)}.markdown-help-modal .ant-modal-header{padding:16px 24px;border-bottom:1px solid var(--border-color);background-color:#1a4e8a0d}.markdown-help-modal .ant-modal-body{padding:24px;max-height:70vh;overflow-y:auto}.markdown-syntax-guide table{margin-bottom:24px;border-color:var(--border-color)}.markdown-syntax-guide h3{margin-top:16px;color:var(--primary-800);font-weight:600}.markdown-syntax-guide th{background-color:#1a4e8a0d!important}@media (max-width: 1024px){.app-main{height:auto;min-height:100vh}body.mobile-layout .app-main{flex-direction:column}.desktop-layout{flex-direction:row!important;height:auto;min-height:800px}}@media (max-width: 768px){body.mobile-layout .app-main{flex-direction:column;padding:12px}body.mobile-layout .desktop-layout{flex-direction:column}body.mobile-layout .desktop-layout .left-panel,body.mobile-layout .desktop-layout .right-panel{width:100%;height:auto;min-height:400px}.mobile-tab-layout{width:100%;height:auto}}@media (max-width: 600px){.app-header{padding:16px;height:auto}.header-content h1{font-size:1.8rem}}.preview-panel,.poster-preview-container{box-shadow:0 4px 12px #00000012!important;overflow:hidden;background-color:#f8f9fa!important}.poster-preview-container{display:flex!important;flex-direction:column!important;height:100%!important;overflow:auto!important;background-color:#f8f9fa!important}.preview-content-wrapper{padding:20px;height:auto;overflow:auto}.poster-fixed-container{margin:0 auto!important;position:relative!important;border-radius:16px!important;overflow:hidden!important;transition:all .3s ease!important;background-color:#fff!important;box-shadow:0 4px 20px #00000026!important}.poster-fixed-container .preview-image{width:100%!important;height:100%!important;-o-object-fit:contain!important;object-fit:contain!important;-o-object-position:center!important;object-position:center!important;display:block!important;margin:0!important;padding:0!important}.empty-preview-state{display:flex!important;justify-content:center!important;align-items:center!important;width:100%!important;padding:0!important}.dimension-indicator{position:absolute!important;bottom:10px!important;right:10px!important;background-color:#0009!important;color:#fff!important;font-size:12px!important;padding:4px 8px!important;border-radius:4px!important;z-index:10!important}.content-auto-height{overflow:hidden!important}.preview-content-wrapper.auto-height-mode{padding:20px 30px!important;min-height:100%!important;height:auto!important;max-height:none!important;display:flex!important;flex-direction:column!important;align-items:center!important;justify-content:flex-start!important;overflow-y:visible!important}.preview-content-wrapper.fixed-height-mode{padding:20px 30px!important;min-height:100%!important;display:flex!important;flex-direction:column!important;align-items:center!important;justify-content:flex-start!important;overflow-y:auto!important}.preview-content-wrapper.apple-notes-bg{padding-top:0!important;padding-left:0!important;padding-right:0!important;justify-content:flex-start!important;overflow-y:auto!important;max-height:none!important;height:auto!important}.apple-notes-header{display:flex!important;justify-content:space-between!important;align-items:center!important;padding:12px 16px!important;background-color:#f7f6f2!important;border-bottom:1px solid rgba(0,0,0,.1)!important;position:sticky!important;top:0!important;z-index:10!important}.apple-notes-yellow-header{background-color:#faf3d3!important}.apple-notes-title{font-size:20px!important;font-weight:600!important;color:#333!important;margin:32px 16px 24px!important;padding-top:20px!important}.back-button{display:flex!important;align-items:center!important;font-size:16px!important;color:#007aff!important}.back-button svg{width:20px!important;height:20px!important;margin-right:4px!important}.header-buttons{display:flex!important;gap:12px!important}.header-button{background:transparent!important;border:none!important;padding:4px!important;color:#007aff!important;cursor:pointer!important;min-height:auto!important}.header-button svg{width:20px!important;height:20px!important}.auto-height-mode .poster-fixed-container{height:auto!important;min-height:auto!important;max-height:none!important;margin-bottom:30px!important;overflow:visible!important}.auto-height-mode .preview-image{height:auto!important;max-height:none!important;min-height:auto!important;-o-object-fit:contain!important;object-fit:contain!important;width:100%!important}.preview-content-wrapper .preview-image,img.preview-image{box-shadow:none!important;max-width:100%!important;width:100%!important;display:block!important;margin:0!important;transition:all .3s ease-in-out!important}.auto-height-mode img.preview-image{height:auto!important;max-height:none!important;-o-object-fit:contain!important;object-fit:contain!important}.fixed-height-mode img.preview-image{height:100%!important;-o-object-fit:cover!important;object-fit:cover!important}.app-header{position:relative;min-height:460px}h1,h2,h3,h4,h5,h6{font-family:"Noto Serif SC",serif;font-weight:700}.btn-primary{background-color:var(--primary-600);color:#fff;border:none;padding:.5rem 1.25rem;border-radius:.375rem;font-weight:500;transition:all .3s ease}.btn-primary:hover{background-color:var(--primary-700);transform:translateY(-1px);box-shadow:0 4px 6px #0000001a}.card{background-color:#fff;border-radius:.5rem;box-shadow:0 2px 10px #003b801a;border:1px solid var(--accent-light);transition:all .3s ease}.card:hover{box-shadow:0 5px 15px #003b8026;transform:translateY(-2px)}.ceramic-input{border:1px solid var(--accent-light);background-color:var(--ceramic-white);border-radius:.375rem;padding:.5rem .75rem;transition:all .3s ease}.ceramic-input:focus{border-color:var(--primary-400);box-shadow:0 0 0 3px #1a8cd833;outline:none}.ceramic-selector{border:2px solid var(--primary-200);background-color:var(--ceramic-white);color:var(--primary-700);border-radius:.375rem;padding:.5rem;transition:all .2s ease}.ceramic-selector.active,.ceramic-selector:hover{background-color:var(--primary-50);border-color:var(--primary-500);color:var(--primary-800)}.poster-preview-container::-webkit-scrollbar{width:8px}.poster-preview-container::-webkit-scrollbar-track{background:#1a4e8a1a;border-radius:4px}.poster-preview-container::-webkit-scrollbar-thumb{background-color:#1a4e8a4d;border-radius:4px;border:2px solid rgba(26,78,138,.1)}.poster-preview-container::-webkit-scrollbar-thumb:hover{background-color:#1a4e8a80}.preview-content-wrapper.has-overflow:after{content:"";position:absolute;bottom:10px;left:50%;transform:translate(-50%);width:40px;height:20px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='rgba(26, 78, 138, 0.5)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 13l5 5 5-5'/%3E%3Cpath d='M7 6l5 5 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