*,*:before,*:after{box-sizing:border-box}:root{--bg: #0b1020;--card-bg: #121a33;--text: #e8eeff;--muted: #93a4c7;--accent: #5dd6c6;--border: rgba(255, 255, 255, .12);--shadow: 0 10px 30px rgba(0, 0, 0, .35);--radius: 14px;--maxw: 1200px;--sans: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}body{margin:0;font-family:var(--sans);background:radial-gradient(1200px 800px at 20% 0%,#162450 0%,var(--bg) 55%),radial-gradient(1000px 700px at 100% 30%,#0f2b3a 0%,var(--bg) 60%);color:var(--text);min-height:100vh}.app-header{position:sticky;top:0;z-index:20;background:#0b1020c7;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.header-inner{max-width:var(--maxw);margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:10px}.logo{font-size:22px}.brand-name{font-weight:700;font-size:17px;letter-spacing:.2px;color:var(--text);text-decoration:none}.brand-name a,.brand-name a:visited{color:inherit;text-decoration:none}.tagline{color:var(--muted);font-size:13px;margin-left:4px}.home-main{max-width:var(--maxw);margin:0 auto;padding:40px 20px 60px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}.tool-card{display:flex;align-items:flex-start;gap:16px;background:color-mix(in oklab,var(--card-bg) 92%,black 8%);border:1px solid var(--border);border-radius:var(--radius);padding:24px;text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:border-color .18s ease,transform .18s ease;cursor:pointer}.tool-card:hover{border-color:var(--accent);transform:translateY(-2px)}.tool-emoji{font-size:32px;flex-shrink:0;line-height:1}.tool-info h3{margin:0 0 6px;font-size:16px;font-weight:700}.tool-info p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.tool-page{max-width:var(--maxw);margin:0 auto;padding:20px}.back-link{display:inline-flex;align-items:center;gap:6px;color:var(--muted);text-decoration:none;font-size:13px;margin-bottom:16px;transition:color .15s}.back-link:hover{color:var(--accent)}@media(max-width:640px){.tool-grid{grid-template-columns:1fr}.header-inner{padding:12px 14px}.home-main{padding:24px 14px 40px}}