:root{--primary-color:#4f46e5;--primary-hover:#4338ca;--primary-glow:rgba(79,70,229,.12);--accent-color:#7c3aed;--bg-color:#f8fafc;--card-bg:#fff;--card-border:rgba(99,102,241,.12);--text-color:#0f172a;--text-muted:#64748b;--text-light:#94a3b8;--danger-color:#ef4444;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--max-width:1200px;--transition:all .2s ease;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.08), 0 2px 4px -2px rgba(0,0,0,.05);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -4px rgba(0,0,0,.04)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);font-family:var(--font-sans);flex-direction:column;min-height:100vh;line-height:1.6;display:flex;position:relative;overflow-x:hidden}body:before{content:"";z-index:-1;pointer-events:none;background:radial-gradient(350px at 50% 80px,rgba(99,102,241,.06),transparent 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#cbd5e1;border-radius:4px;flex:1;padding:4px 8px;font-size:12px}.setting-text-input:focus{border-color:var(--primary-color);outline:none}.export-btn-group{flex-direction:column;gap:8px;margin-top:4px;display:flex}.app-footer{max-width:var(--max-width);background:rgba(255,255,255,.5);border-top:1px solid rgba(0,0,0,.05);width:100%;margin:auto auto 0}.footer-content{max-width:var(--max-width);text-align:center;flex-direction:column;align-items:center;gap:16px;margin:0 auto;padding:20px;display:flex}.footer-lang-nav{flex-wrap:wrap;justify-content:center;gap:8px 10px;width:100%;display:flex}.footer-links{gap:16px;display:flex}.footer-link{color:var(--primary-color);transition:var(--transition);background:rgba(79,70,229,.04);border:1px solid rgba(79,70,229,.2);border-radius:20px;padding:4px 12px;font-size:13px;font-weight:500;text-decoration:none}.footer-link:hover{border-color:var(--primary-color);background:rgba(79,70,229,.08)}@media (max-width:1240px){.lang-nav,.app-container{padding-left:16px;padding-right:16px}}@media (max-width:960px){.workspace-layout{grid-template-columns:1fr}.crop-viewport{height:380px;min-height:320px}.preview-panel{width:100%;max-width:480px;margin:0 auto}.brand-section{flex-direction:column;align-items:flex-start}.header-ad{display:none}}@media (max-width:640px){.app-title{font-size:1.3rem}.action-bar{flex-direction:column;align-items:stretch}.action-group-left,.action-group-right{justify-content:space-between}.action-group-left .btn,.action-group-right .btn{flex:1;padding:7px 8px;font-size:12px}.crop-viewport{height:320px}.crop-handle{width:22px;height:22px}}.content-wrapper{flex-direction:column;gap:20px;margin-top:14px;display:flex}.doc-section{background:var(--card-bg);border:1px solid var(--card-border);box-shadow:var(--shadow-sm);border-radius:12px;padding:24px 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8px;font-size:11px;font-weight:700}.step-icon-wrap{width:40px;height:40px;color:var(--primary-color);background:rgba(79,70,229,.08);border-radius:8px;justify-content:center;align-items:center;display:flex}.step-icon{fill:currentColor;width:22px;height:22px}.step-content{flex-direction:column;gap:6px;display:flex}.step-content strong{color:var(--text-color);font-size:14px;font-weight:600;line-height:1.4}.step-content span{color:var(--text-muted);font-size:12.5px;line-height:1.6}.step-content code{color:#334155;background:#e2e8f0;border-radius:3px;padding:1px 4px;font-size:11.5px}.feature-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.feature-card{transition:var(--transition);background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;flex-direction:column;gap:12px;padding:18px 16px;display:flex}.feature-card:hover{box-shadow:var(--shadow-md);background:#fff;border-color:rgba(79,70,229,.3);transform:translateY(-2px)}.feature-icon-wrap{width:42px;height:42px;color:var(--primary-color);background:linear-gradient(135deg,rgba(79,70,229,.1),rgba(124,58,237,.1));border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;display:flex}.feature-icon{fill:currentColor;width:22px;height:22px}.feature-body{flex-direction:column;gap:5px;display:flex}.feature-body h3{color:var(--text-color);font-size:14px;font-weight:600;line-height:1.4}.feature-body p{color:var(--text-muted);font-size:12.5px;line-height:1.6}@media (max-width:960px){.steps-flow,.feature-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:640px){.steps-flow,.feature-grid{grid-template-columns:1fr;gap:12px}.doc-section{padding:18px 14px}}