:root{--ink: #172033;--ink-strong: #0f172a;--muted: #5f6f83;--subtle: #7d8da1;--line: #dce5ef;--line-strong: #c8d5e3;--surface: #ffffff;--surface-soft: #f7fafc;--surface-tint: #eef6f5;--accent: #0f766e;--accent-strong: #0b5f59;--accent-soft: #dff5f1;--blue: #2563eb;--blue-strong: #1d4ed8;--focus: rgba(15, 118, 110, .28);--shadow-sm: 0 8px 22px rgba(15, 23, 42, .06);--shadow-md: 0 18px 42px rgba(15, 23, 42, .1);--radius: 8px;color:var(--ink);background:#eef3f6;font-family:Inter,Microsoft YaHei,PingFang SC,Segoe UI,Arial,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0;background:linear-gradient(180deg,#fffffff0,#eef3f6f5 42%,#e5edf2fa),#eef3f6}button,input,select{font:inherit}input[type=range]{accent-color:var(--accent)}input[type=color]{cursor:pointer}button{border:0}.app-shell{width:min(1440px,100%);min-height:100vh;margin:0 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900px){.app-shell{padding:12px}.top-bar{align-items:stretch;flex-direction:column}.brand-lockup{min-width:0}.export-actions{justify-content:flex-start}.top-actions{align-items:flex-start;flex-direction:column;justify-content:flex-start;gap:12px}.language-toggle{margin-left:0}.site-footer{align-items:flex-start;flex-direction:column}.footer-left,.footer-right{width:100%}.footer-right{justify-content:flex-start;margin-left:0}.workspace{grid-template-columns:1fr}.compressor-heading{flex-direction:column}.compressor-status{max-width:none;text-align:left}.compressor-grid,.compressor-results{grid-template-columns:1fr}.preview-area{min-height:520px;order:-1}.control-panel{padding:14px}.preview-header{flex-direction:column}.preview-header p{text-align:left}.preview-export-panel{justify-content:flex-start}}@media (max-width: 520px){h1{font-size:22px}.brand-subtitle{font-size:12px}.export-actions{display:grid;grid-template-columns:1fr 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