:root{font-family:'DM Sans','Microsoft YaHei',sans-serif;color:#202631;background:#f7f8fa;font-synthesis:none;--blue:#1539cb;--muted:#78818e;--line:#e5e8ed}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer}button{transition:background .18s,transform .18s,color .18s}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #7993ff;outline-offset:4px}a{color:inherit;text-decoration:none}button:hover:not(:disabled){filter:brightness(.96)}.header{height:100px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;max-width:1440px;margin:auto;padding:0 64px}.brand{display:flex;gap:12px;align-items:center;font-family:Manrope,sans-serif;font-size:23px;font-weight:700;letter-spacing:-1px}.brand b{color:var(--blue);font-weight:800}.brand small{display:block;font-family:'Microsoft YaHei',sans-serif;font-size:10px;letter-spacing:2px;font-weight:400;color:#8a929e;margin-top:4px}.brand-icon{width:43px;height:43px;display:flex;align-items:center;justify-content:center;background:var(--blue);color:white;border-radius:13px;font-size:40px;line-height:1;position:relative;padding-bottom:4px}.brand-icon span{position:absolute;color:#c8f77b;font-size:29px;right:4px;top:0}.header nav{display:flex;align-items:center;gap:28px}.text-button{border:0;background:none;color:#697382;font-size:14px;padding:8px 0}.text-button span{margin-left:6px}.settings-button{background:white;border:1px solid #dce1e8;border-radius:8px;padding:10px 16px;font-size:14px;color:#404b5c}.settings-button>span{font-size:18px;margin-right:7px}main{max-width:1312px;margin:auto;padding:0 48px}.intro{display:flex;justify-content:space-between;align-items:center;margin:58px 0 38px}.eyebrow{display:flex;align-items:center;gap:8px;font:600 11px 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28px;display:flex;align-items:center;justify-content:space-between}.workspace-title{font-size:14px;font-weight:600;display:flex;align-items:center;gap:10px}.tool-icon{color:#687587;font-size:21px}.mode-badge{font-size:12px;color:#5e6e85;background:#f1f4f8;border:1px solid #e6ebf1;border-radius:5px;padding:5px 9px}.mode-badge.live{color:#214ba0;background:#edf2ff}.editors{display:grid;grid-template-columns:1fr 1fr;position:relative}.editor{min-width:0;min-height:320px;padding:25px 28px 17px;display:flex;flex-direction:column}.input-editor{border-right:1px solid var(--line)}.output-editor{background:#f6f8fe}.editor-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.editor-heading h2{margin:0;font-size:14px;font-weight:600;display:flex;align-items:center;gap:8px}.small-dot{width:6px;height:6px;border-radius:50%;background:#7e8795}.sparkle{color:var(--blue);font-size:19px}.language-label{color:#8a92a0;font-size:12px}.editor-heading select{background:transparent;border:0;color:#536382;font-size:13px;padding:5px;border-radius:4px}.editor textarea{width:100%;resize:vertical;min-height:190px;max-height:520px;border:0;outline-offset:0;background:transparent;padding:26px 0 15px;color:#283140;font-size:22px;line-height:1.7}.editor textarea::placeholder{font-size:19px;color:#a5acb8}.editor-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:32px;font-size:12px;color:#929ba9}.subtle-button{color:#8a94a3;border:0;background:none;font-size:17px;padding:4px 0}.subtle-button span{font-size:12px;margin-left:3px}.center-arrow{position:absolute;left:50%;top:47%;transform:translate(-50%,-50%);width:34px;height:34px;border-radius:50%;border:1px solid #e1e6ef;background:white;display:grid;place-items:center;color:var(--blue);z-index:1}.output{padding:22px 0 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28px;display:flex;justify-content:space-between;align-items:center;gap:20px}.tone-control{display:flex;align-items:center;gap:18px}.control-label{font-size:13px;color:#727c8b;white-space:nowrap}.segments{display:flex;background:#f4f5f8;padding:4px;border-radius:8px;gap:3px}.segments button{font-size:13px;background:none;border:1px solid transparent;padding:9px 15px;border-radius:6px;color:#737d8d;white-space:nowrap}.segments button.selected{background:white;color:var(--blue);border-color:#e5e9f0;box-shadow:0 2px 4px #1539cb08}.segments span{padding-left:2px}.primary-button{border:0;background:var(--blue);border-radius:8px;color:white;padding:13px 20px;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:14px;font-weight:500;min-height:46px;box-shadow:0 4px 8px #1539cb18}.primary-button>span:first-child{font-size:18px}.primary-button kbd{font:10px inherit;opacity:.6;border:1px solid #ffffff40;border-radius:3px;padding:2px 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p{font-size:22px}.controls{padding:18px;flex-direction:column;align-items:stretch;gap:17px}.tone-control{gap:10px}.segments{width:100%;justify-content:space-between}.segments button{flex:1;padding:10px 5px;font-size:12px}.primary-button{width:100%}.workspace-foot{padding:12px 18px;font-size:11px;line-height:1.6}.section-heading>span{display:none}.section-heading h2{font-size:14px}.examples{gap:10px}.example{padding:14px 10px;gap:8px}.example-icon{width:28px;height:30px;font-size:18px}.example strong{font-size:12px;white-space:normal}.example-category{font-size:11px}.example-arrow{display:none}footer{flex-wrap:wrap;margin-top:32px;gap:12px;padding:22px 0}footer p{order:3;width:100%;font-size:10px}.editor-heading h2{font-size:14px}.dialog-actions .primary-button{width:auto}.editor-bottom #result-caption{font-size:11px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}