:root{--fg-1: #eefbff;--fg-2: #a0bdc7;--fg-3: #597e8a;--bg-1: #000519;--bg-2: #000f27;--bg-3: #001f38;--surface-1: rgba(0, 19, 43, .86);--surface-2: rgba(0, 32, 58, .9);--line-1: rgba(36, 158, 189, .24);--line-2: rgba(58, 218, 242, .52);--accent-cyan: #1ee4f6;--accent-blue: #00a5f1;--accent-gold: #fdc94b;--accent-coral: #ed886e;--success: #61d19a;--danger: #f9786a;--font-display: "Songti SC", "STSong", "SimSun", Georgia, "Times New Roman", serif;--font-body: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--font-data: "SF Mono", ui-monospace, Menlo, Consolas, monospace;--text-xs: .72rem;--text-sm: .82rem;--text-md: .96rem;--text-lg: 1.18rem;--text-xl: 1.72rem;--space-1: .35rem;--space-2: .6rem;--space-3: .9rem;--space-4: 1.25rem;--space-5: 1.75rem;--space-6: 2.5rem;--radius-sm: .45rem;--radius-md: .8rem;--radius-lg: 1.35rem;--radius-pill: 999px;--shadow-deep: 0 24px 80px rgba(0, 0, 3, .5);--shadow-glow: 0 0 42px rgba(0, 201, 222, .18);--ease-silk: cubic-bezier(.22, .78, .24, 1);--ease-snap: cubic-bezier(.18, .9, .22, 1.18);--duration-fast: .16s;--duration-base: .32s;--duration-slow: .72s;--surface-primary: var(--surface-1);--surface-elevated: var(--surface-2);--border-subtle: var(--line-1);--border-focus: var(--line-2);--text-primary: var(--fg-1);--text-secondary: var(--fg-2);--text-muted: var(--fg-3);--interactive-primary: var(--accent-cyan);--interactive-celebration: var(--accent-gold)}*{box-sizing:border-box}html,body{margin:0;padding:0;background:radial-gradient(circle at 50% 12%,#123a63,#061529 45%,#020817);background-color:#020817;color:var(--text-primary);font-family:var(--font-body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}h1,h2,h3{font-family:var(--font-display);font-weight:600;margin:0;letter-spacing:.01em}button{cursor:pointer;border:none;background:none}button:disabled{cursor:not-allowed;opacity:.45}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:var(--radius-pill);font-size:var(--text-md);font-weight:500;letter-spacing:.02em;transition:transform var(--duration-fast) var(--ease-snap),opacity var(--duration-fast)}.btn-primary{background:linear-gradient(120deg,var(--accent-cyan),var(--accent-blue));color:#04182c;font-weight:600;box-shadow:var(--shadow-glow)}.btn-primary:hover:not(:disabled){transform:translateY(-1px)}.btn-ghost{border:1px solid var(--border-focus);color:var(--text-secondary);background:#ffffff08}.btn-text{color:var(--text-muted);font-size:var(--text-sm);padding:8px;text-decoration:underline}.btn-block{display:flex;width:100%}.input,textarea.input{width:100%;padding:12px 14px;border-radius:var(--radius-md);border:1px solid var(--border-subtle);background:#ffffff0a;color:var(--text-primary);outline:none;transition:border-color var(--duration-fast)}.input:focus{border-color:var(--border-focus)}.input::placeholder{color:var(--text-muted)}.card{padding:var(--space-4);border-radius:var(--radius-lg);border:1px solid var(--border-subtle);background:var(--surface-primary);box-shadow:var(--shadow-deep)}.mono{font-family:var(--font-data)}.toast{position:fixed;left:50%;bottom:8%;transform:translate(-50%);padding:11px 20px;border-radius:var(--radius-pill);z-index:200;background:#061629f2;border:1px solid var(--border-focus);font-size:var(--text-sm);box-shadow:var(--shadow-deep);animation:toast-in var(--duration-base) var(--ease-snap)}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,10px)}}.stars-bg{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;background-image:radial-gradient(circle at 20% 30%,#ffffff 0 1px,transparent 1.6px),radial-gradient(circle at 70% 60%,#bfe9ff 0 1px,transparent 1.4px),radial-gradient(circle at 45% 80%,#ffffff 0 1.2px,transparent 1.8px);background-size:180px 160px,240px 200px,300px 260px;opacity:.5;animation:twinkle 6s ease-in-out infinite}@keyframes twinkle{50%{opacity:.22}}