:root{--primary: #ff6b35;--primary-dark: #ff4500;--secondary: #7c3aed;--bg-dark: #0f172a;--bg-card: rgba(30, 41, 59, .8);--text-primary: #f1f5f9;--text-secondary: #94a3b8;--success: #10b981;--border: rgba(148, 163, 184, .2)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2,#f093fb);color:var(--text-primary);padding:1rem;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;min-height:100vh;min-height:100dvh}body:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 1px,transparent 1px);background-size:50px 50px;animation:drift 20s linear infinite;pointer-events:none}@keyframes drift{0%{transform:translate(0)}to{transform:translate(50px,50px)}}main{width:100%;max-width:500px;background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;padding:3rem 2rem;box-shadow:0 20px 60px #0006;border:1px solid var(--border);animation:slideIn .6s cubic-bezier(.16,1,.3,1);position:relative;z-index:1}@keyframes slideIn{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}header{text-align:center;margin-bottom:2.5rem;animation:fadeIn .8s ease-out .2s backwards}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,#fff,#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:.75rem;letter-spacing:-.02em}header p{color:var(--text-secondary);font-size:.95rem;font-weight:400}.input-group{margin-bottom:2rem;animation:fadeIn .8s ease-out .4s backwards}label{display:block;font-weight:600;margin-bottom:.75rem;font-size:.875rem;text-transform:uppercase;letter-spacing:.05em;color:var(--text-primary)}input[type=text]{width:100%;padding:1rem 1.25rem;background:#0f172a99;border:2px solid var(--border);border-radius:12px;color:var(--text-primary);font-size:1rem;outline:none;transition:all .3s cubic-bezier(.4,0,.2,1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}input[type=text]::placeholder{color:var(--text-secondary);opacity:.6}input[type=text]:focus{border-color:var(--primary);box-shadow:0 0 0 4px #ff6b351a}.input-group>p{margin-top:.5rem;font-size:.8rem;color:var(--text-secondary);font-style:italic}.result-container{animation:fadeIn .8s ease-out .6s backwards}.output-wrapper{display:flex;gap:.75rem;align-items:center;padding:1rem 1.25rem;background:#0f172a99;border:2px solid var(--border);border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all .3s ease}.output-wrapper:has(output:not(:empty)){border-color:var(--success);box-shadow:0 0 0 4px #10b9811a}output{flex:1;color:var(--text-primary);font-size:1.125rem;font-weight:700;letter-spacing:.1em;font-family:Courier New,monospace;min-height:1.5rem}output:empty:before{content:"等待输入...";color:var(--text-secondary);font-weight:400;opacity:.5;font-family:Inter,sans-serif;letter-spacing:normal}button{width:44px;height:44px;border:none;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 12px #ff6b354d;position:relative;overflow:hidden}button:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}button:not(:disabled):hover{transform:translateY(-2px) scale(1.05);box-shadow:0 8px 20px #ff6b3566}button:not(:disabled):active{transform:translateY(0) scale(.98)}button svg{width:20px;height:20px;position:relative;z-index:1}button:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.2),transparent);opacity:0;transition:opacity .3s}button:hover:before{opacity:1}@keyframes copySuccess{0%,to{transform:scale(1)}50%{transform:scale(1.2)}}button.copied{animation:copySuccess .4s cubic-bezier(.4,0,.2,1);background:linear-gradient(135deg,var(--success),#059669)}.toast{position:fixed;bottom:2rem;left:50%;transform:translate(-50%) translateY(100px);background:#10b981f2;color:#fff;padding:1rem 1.5rem;border-radius:12px;font-weight:600;box-shadow:0 10px 30px #0000004d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);z-index:1000;opacity:0;transition:all .3s cubic-bezier(.4,0,.2,1)}.toast.show{opacity:1;transform:translate(-50%) translateY(0)}@media(max-width:640px){main{padding:2rem 1.5rem}h1{font-size:1.5rem}}