:root{--primary: #2563eb;--primary-dark: #1d4ed8;--bg: #f6f7fb;--card-bg: #ffffff;--text: #1f2937;--text-secondary: #6b7280;--border: #e5e7eb;--radius: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04)}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}header.site-header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:0 1px 4px #0000000a}.header-inner{display:flex;align-items:center;gap:16px;height:60px}.logo{display:flex;align-items:center;gap:8px;font-size:19px;font-weight:700;color:var(--primary);text-decoration:none;white-space:nowrap}.logo-icon{font-size:24px}nav.top-nav{display:flex;gap:4px;flex-wrap:wrap}nav.top-nav a{color:var(--text-secondary);text-decoration:none;font-size:14px;padding:6px 12px;border-radius:8px;transition:all .15s}nav.top-nav a:hover{background:#eff6ff;color:var(--primary)}main{flex:1;padding:28px 0 48px}footer.site-footer{border-top:1px solid var(--border);background:#fff;padding:20px 0;color:var(--text-secondary);font-size:13px;text-align:center}footer.site-footer a{color:var(--primary);text-decoration:none}h1.page-title{font-size:26px;font-weight:700;margin-bottom:8px}.page-desc{color:var(--text-secondary);margin-bottom:24px;font-size:15px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.tool-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:18px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:6px;transition:all .15s;box-shadow:var(--shadow)}.tool-card:hover{border-color:var(--primary);transform:translateY(-2px);box-shadow:0 6px 16px #2563eb1f}.tool-card .tc-name{font-size:15px;font-weight:600;display:flex;align-items:center;gap:8px}.tool-card .tc-icon{font-size:20px}.tool-card .tc-desc{font-size:13px;color:var(--text-secondary);flex:1}.section-title{font-size:18px;font-weight:700;margin:28px 0 14px;display:flex;align-items:center;gap:8px}.section-title .st-icon{font-size:20px}.tool-page{max-width:860px;margin:0 auto}.breadcrumb{font-size:13px;color:var(--text-secondary);margin-bottom:16px}.breadcrumb a{color:var(--primary);text-decoration:none}.tool-body{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.tool-body textarea,.tool-body input[type=text],.tool-body input[type=number],.tool-body input[type=password],.tool-body select{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;font-family:inherit;background:#fff;color:var(--text);transition:border-color .15s}.tool-body textarea{resize:vertical;min-height:120px;line-height:1.5}.tool-body textarea:focus,.tool-body input:focus,.tool-body select:focus{outline:none;border-color:var(--primary)}.form-row{margin-bottom:14px}.form-row label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--text)}.btn{display:inline-flex;align-items:center;gap:6px;padding:9px 18px;border:none;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:all .15s;text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-secondary{background:#eef2f7;color:var(--text)}.btn-secondary:hover{background:#e2e8f0}.btn-group{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.result-box{background:#f8fafc;border:1px solid var(--border);border-radius:8px;padding:12px;font-size:13px;color:var(--text-secondary);margin-top:10px;word-break:break-all;max-height:280px;overflow:auto;white-space:pre-wrap}.copy-btn{position:sticky}.tool-tip{font-size:12px;color:var(--text-secondary);margin-top:4px}.badge{display:inline-block;background:#eff6ff;color:var(--primary);font-size:12px;padding:2px 8px;border-radius:999px}@media(max-width:768px){.header-inner{flex-direction:column;height:auto;padding:10px 0;gap:8px}nav.top-nav{justify-content:center}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}