:root{--primary: #2563eb;--primary-dark: #1e40af;--primary-light: #eff6ff;--bg: #f6f8fb;--surface: #ffffff;--text: #1f2937;--text-secondary: #6b7280;--border: #e5e7eb;--danger: #dc2626;--danger-bg: #fef2f2;--success: #16a34a;--radius: 12px;--shadow: 0 1px 3px rgba(15, 23, 42, .08);--shadow-lg: 0 10px 30px rgba(15, 23, 42, .1)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:inherit;text-decoration:none}.container{max-width:1080px;margin:0 auto;padding:0 20px}.main{min-height:calc(100vh - 170px);padding-top:32px;padding-bottom:48px}.site-header{position:sticky;top:0;z-index:10;background:#ffffffeb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:18px}.logo-mark{width:30px;height:30px;border-radius:8px;background:var(--primary);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:16px}.site-footer{border-top:1px solid var(--border);background:var(--surface);padding:24px 0;text-align:center;color:var(--text-secondary);font-size:14px}.site-footer .privacy{margin:0 0 4px}.site-footer .copyright{margin:0}.hero{text-align:center;padding:40px 0 8px}.hero h1{font-size:34px;margin:0 0 12px}.hero p{color:var(--text-secondary);max-width:640px;margin:0 auto;font-size:16px}.section-title{font-size:20px;margin:32px 0 16px}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:900px){.tool-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.tool-grid{grid-template-columns:1fr}.hero h1{font-size:26px}}.tool-card{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s,border-color .15s}.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary)}.tool-icon{width:48px;height:48px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px}.tool-text h3{margin:2px 0 4px;font-size:16px}.tool-text p{margin:0;color:var(--text-secondary);font-size:13px}.tool-page{max-width:860px;margin:0 auto}.page-head{margin-bottom:20px}.page-head h1{font-size:26px;margin:0 0 8px}.page-head p{margin:0;color:var(--text-secondary)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:16px}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);background:var(--surface);padding:48px 24px;text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.dropzone:hover,.dropzone.dragging{border-color:var(--primary);background:var(--primary-light)}.dz-icon{font-size:42px;margin-bottom:8px}.dz-title{font-size:17px;font-weight:600;margin:0 0 6px}.dz-sub{margin:0;color:var(--text-secondary);font-size:14px}.dz-link{color:var(--primary);font-weight:600}.dz-hint{margin:10px 0 0;color:var(--text-secondary);font-size:13px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:10px;padding:10px 20px;font-size:15px;font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,color .15s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-outline{background:var(--surface);border-color:var(--border);color:var(--text)}.btn-outline:hover:not(:disabled){border-color:var(--primary);color:var(--primary)}.btn-ghost{background:transparent;border-color:var(--border);color:var(--text);padding:6px 14px;font-size:14px}.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}.btn-sm{padding:4px 10px;font-size:13px;border-radius:8px}.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:16px}label.field{display:block;font-size:14px;font-weight:600;margin-bottom:12px}select,input[type=text],input[type=number]{border:1px solid var(--border);border-radius:8px;padding:8px 12px;font-size:14px;background:#fff;color:var(--text)}input[type=range]{accent-color:var(--primary)}.form-error{color:var(--danger);font-size:14px;margin:8px 0 0}.options-grid{display:flex;flex-wrap:wrap;gap:20px;align-items:flex-end}.option-value{color:var(--primary);font-weight:700}.progress-wrap{margin:20px 0}.progress-bar{height:10px;border-radius:999px;background:var(--border);overflow:hidden}.progress-fill{height:100%;border-radius:999px;background:var(--primary);transition:width .2s}.progress-label{text-align:center;color:var(--text-secondary);font-size:14px;margin:8px 0 0}.error-alert{background:var(--danger-bg);color:var(--danger);border:1px solid #fecaca;border-radius:10px;padding:12px 16px;margin:12px 0;font-size:14px;word-break:break-all}.note{background:var(--primary-light);border-radius:10px;padding:10px 14px;color:var(--text-secondary);font-size:13px;margin:12px 0}.result-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:14px}.result-item{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;box-shadow:var(--shadow)}.result-item img{width:100%;height:160px;object-fit:contain;background:#f9fafb;display:block}.result-item .meta{padding:8px 10px;display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text-secondary)}.file-list{display:flex;flex-direction:column;gap:8px;margin:16px 0}.file-row{display:flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 14px}.file-row .name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}.file-row .info{color:var(--text-secondary);font-size:13px;flex:none}.file-row .actions{display:flex;gap:6px;flex:none}.thumb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(90px,1fr));gap:10px;margin:14px 0}.thumb-grid img{width:100%;border:1px solid var(--border);border-radius:6px;background:#fff;display:block}.stats{display:flex;flex-wrap:wrap;gap:16px;margin:14px 0}.stat{background:var(--primary-light);border-radius:10px;padding:10px 16px;font-size:14px;color:var(--text-secondary)}.stat b{display:block;font-size:18px;color:var(--primary-dark)}.preview-img{max-width:100%;max-height:420px;border:1px solid var(--border);border-radius:10px;background:#f9fafb;display:block;margin:12px 0}.file-chip{display:inline-flex;align-items:center;gap:8px;background:var(--primary-light);border-radius:999px;padding:6px 14px;font-size:14px;margin-bottom:12px}