:root{--bg: #f5f8fd;--bg-white: #fff;--primary: #1f7ae0;--primary-dark: #1662ba;--primary-light: rgba(31, 122, 224, .08);--text: #24324a;--text-secondary: #52627b;--text-muted: #8896a8;--border: rgba(36, 50, 74, .08);--border-hover: rgba(31, 122, 224, .25);--radius: 14px;--radius-sm: 10px;--shadow: 0 24px 60px rgba(25, 46, 84, .08);--shadow-sm: 0 8px 24px rgba(25, 46, 84, .06);--transition: .25s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}.page-shell{min-height:100vh;display:flex;flex-direction:column}.site-header{background:var(--bg-white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.header-inner{max-width:1400px;margin:0 auto;padding:0 24px;height:60px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0}.brand-logo{width:32px;height:32px;border-radius:8px}.brand-text strong{display:block;font-size:.95rem;line-height:1.2;color:var(--text)}.brand-text small{display:block;font-size:.72rem;color:var(--text-muted);font-weight:400}.header-h1{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.site-nav{display:flex;align-items:center;gap:4px;margin-left:auto}.site-nav a{padding:6px 14px;border-radius:8px;font-size:.85rem;color:var(--text-secondary);text-decoration:none;transition:all var(--transition)}.site-nav a:hover{color:var(--primary);background:var(--primary-light)}main{flex:1}.keyword-hero{max-width:1400px;margin:0 auto;padding:24px 24px 0}.keyword-hero-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;padding:24px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.keyword-eyebrow{margin-bottom:8px;color:var(--primary);font-size:.82rem;font-weight:700}.keyword-hero h2{margin-bottom:10px;color:var(--text);font-size:clamp(1.35rem,3vw,2rem);line-height:1.3}.keyword-hero p{max-width:860px;color:var(--text-secondary);font-size:.95rem;line-height:1.75}.keyword-pills{display:flex;flex-wrap:wrap;gap:10px;justify-content:flex-end}.keyword-pills a{display:inline-flex;align-items:center;min-height:38px;padding:8px 14px;color:var(--primary-dark);background:var(--primary-light);border:1px solid rgba(31,122,224,.18);border-radius:999px;font-size:.9rem;font-weight:700;text-decoration:none;white-space:nowrap}.keyword-pills a:hover{color:#fff;background:var(--primary);text-decoration:none}.workbench-section{max-width:1400px;margin:0 auto;padding:24px 24px 0}.workbench-grid{display:grid;grid-template-columns:300px 1fr;gap:20px;align-items:start}.tool-panel{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);color:var(--text);padding:20px;display:flex;flex-direction:column;gap:18px;position:sticky;top:80px;overflow:visible}.panel-block{padding-bottom:18px;border-bottom:1px solid var(--border);position:relative}.panel-block:last-of-type{border-bottom:none;padding-bottom:0}.panel-block-status{border-bottom:none}.panel-headline{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:10px}.panel-label{font-size:.88rem;font-weight:700;color:var(--text)}.panel-tag{font-size:.72rem;font-weight:600;color:var(--text-secondary)}.panel-text{font-size:.8rem;color:var(--text-secondary);margin-top:8px;line-height:1.5}.segmented{display:flex;background:var(--bg);border-radius:var(--radius-sm);padding:3px;gap:2px}.segment{flex:1;padding:7px 0;border:none;border-radius:8px;background:transparent;font-size:.82rem;font-weight:650;color:var(--text);cursor:pointer;transition:all var(--transition)}.segment.is-active{background:var(--bg-white);color:var(--primary-dark);box-shadow:0 2px 8px #192e5414}.segment:hover:not(.is-active){color:var(--text)}.swatches{display:flex;flex-wrap:wrap;gap:3px!important}.swatch{min-width:36px;border:2px solid transparent;border-radius:10px;padding:3px;background:none;cursor:pointer;transition:all var(--transition);display:flex;flex-direction:column;align-items:center}.swatch.is-active{border-color:var(--primary)}.swatch:hover:not(.is-active){border-color:var(--border-hover)}.swatch-pattern{display:block;width:30px;height:30px;border-radius:6px;flex-shrink:0}.swatch-pattern.checker{background:repeating-conic-gradient(#e0e0e0 0% 25%,#fff 0% 50%) 0 0 / 10px 10px}.swatch-pattern.light{background:#f5f5f5}.swatch-pattern.dark{background:#2c2c2c}.swatch-pattern.mint{background:#e8f5e9}.custom-color-input{width:36px;height:44px;border:2px solid var(--border);border-radius:10px;padding:3px;cursor:pointer;background:none;align-self:flex-start}.size-picker{position:relative}.size-current{width:100%;display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition)}.size-current:hover{border-color:var(--border-hover)}.size-current svg{width:18px;height:18px;color:var(--text-muted);flex-shrink:0}.size-current-copy strong{display:block;font-size:.86rem;font-weight:700;color:var(--text)}.size-current-copy small{display:block;font-size:.72rem;color:var(--text-secondary)}.size-options{position:relative;top:auto;left:auto;right:auto;margin-top:8px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow);padding:6px;z-index:50;width:100%}.size-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px}.size-options[hidden]{display:none}.size-preset{display:flex;flex-direction:column;padding:8px 10px;border:none;border-radius:8px;background:transparent;cursor:pointer;text-align:left;transition:all var(--transition)}.size-preset:hover{background:var(--bg)}.size-preset.is-active{background:var(--primary-light);color:var(--primary)}.size-preset span{font-size:.82rem;font-weight:650;color:var(--text)}.size-preset.is-active span{color:var(--primary-dark)}.size-preset small{font-size:.7rem;color:var(--text-secondary)}.size-custom-row{display:flex;align-items:center;gap:8px;grid-column:1 / -1;margin-top:6px;padding-top:8px;border-top:1px solid var(--border)}.size-field{display:flex;align-items:center;gap:6px;flex:1;background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:6px 10px}.size-field span{font-size:.78rem;color:var(--text-muted);font-weight:600}.size-field input{width:100%;border:none;background:none;font-size:.85rem;color:var(--text);outline:none}.size-swap{width:32px;height:32px;border:1px solid var(--border);border-radius:8px;background:var(--bg);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.size-swap svg{width:18px;height:18px;color:var(--text-muted)}.size-swap:hover{border-color:var(--border-hover)}.stats-row{display:flex;gap:12px;margin-bottom:12px}.stat-chip{flex:1;padding:10px;background:var(--bg);border-radius:var(--radius-sm);text-align:center}.stat-chip span{display:block;font-size:.72rem;font-weight:600;color:var(--text-secondary);margin-bottom:2px}.stat-chip strong{font-size:.95rem;color:var(--primary-dark)}.status-line{display:flex;justify-content:space-between;align-items:center;font-size:.8rem;margin-bottom:8px}.status-line span{color:var(--text-secondary)}.status-line strong{font-weight:700;color:var(--text)}.progress-bar{height:4px;background:var(--bg);border-radius:2px;overflow:hidden}#progress-fill{display:block;height:100%;width:0%;background:linear-gradient(90deg,var(--primary),#49a7ff);border-radius:2px;transition:width .4s ease}.tool-actions{display:flex;flex-direction:column;gap:8px}.action-primary{display:flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;background:linear-gradient(135deg,var(--primary),#49a7ff);color:#fff;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:700;cursor:pointer;transition:all var(--transition)}.action-primary svg{width:18px;height:18px}.action-primary:hover:not(:disabled){box-shadow:0 8px 24px #1f7ae059;transform:translateY(-1px)}.action-primary:disabled{opacity:.68;cursor:not-allowed}.action-secondary{display:flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;background:var(--bg-white);color:var(--primary-dark);border:1px solid var(--border-hover);border-radius:var(--radius-sm);font-size:.85rem;font-weight:700;cursor:pointer;transition:all var(--transition)}.action-secondary svg{width:18px;height:18px}.action-secondary:hover:not(:disabled){background:var(--primary-light)}.action-secondary:disabled{opacity:.68;cursor:not-allowed}.action-text{padding:6px;border:none;background:none;color:var(--text-secondary);font-size:.82rem;font-weight:650;cursor:pointer;transition:color var(--transition)}.action-text:hover:not(:disabled){color:var(--primary)}.action-text:disabled{opacity:.68;cursor:not-allowed}.result-panel{background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:20px;min-height:400px}.result-panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid var(--border)}.result-panel-head h2{font-size:1.05rem;font-weight:600;color:var(--text)}.result-panel-head p{font-size:.8rem;color:var(--text-muted);margin-top:2px}.upload-entry{margin-bottom:16px}.upload-entry-head{margin-bottom:10px}.dropzone-panel{border:2px dashed rgba(255,255,255,.35);border-radius:var(--radius);padding:36px 20px;text-align:center;cursor:pointer;transition:all var(--transition);background:linear-gradient(135deg,var(--primary),#49a7ff)}.dropzone-panel:hover,.dropzone-panel.drag-over{border-color:#fff;background:linear-gradient(135deg,var(--primary-dark),var(--primary))}.dropzone-icon{margin-bottom:10px}.dropzone-icon svg{width:40px;height:40px;color:#ffffffd9}.dropzone-panel strong{display:block;font-size:.9rem;line-height:1.45;color:#fff;margin-bottom:4px;overflow-wrap:anywhere}.dropzone-panel span{font-size:.78rem;color:#ffffffbf}.upload-feedback{font-size:.78rem;color:var(--text-muted);margin-top:8px}.upload-feedback:empty{display:none}.task-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}.task-empty{grid-column:1 / -1;text-align:center;padding:40px 20px;color:var(--text-muted)}.task-empty strong{display:block;font-size:.9rem;color:var(--text-secondary);margin-bottom:4px}.task-empty span{font-size:.78rem}.task-card{padding:16px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition)}.task-card:hover{border-color:var(--border-hover)}.task-card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin-bottom:12px}.task-card-title{min-width:0;flex:1}.task-card-title strong{display:block;font-size:.88rem;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.task-card-title span{display:block;font-size:.75rem;color:var(--text-muted);margin-top:2px}.task-card-head-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.status-badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:600;line-height:1.4}.status-queued{background:var(--bg);color:var(--text-muted)}.status-processing{background:#1f7ae01a;color:var(--primary)}.status-done{background:#22c55e1a;color:#16a34a}.status-error{background:#ef44441a;color:#dc2626}.icon-button{width:30px;height:30px;border:1px solid var(--border);border-radius:8px;background:var(--bg);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition);padding:0}.icon-button svg{width:16px;height:16px;color:var(--text-muted)}.icon-button:hover:not(:disabled){border-color:var(--border-hover);background:var(--primary-light)}.icon-button:hover:not(:disabled) svg{color:var(--primary)}.icon-button-danger:hover:not(:disabled){border-color:#ef44444d;background:#ef44440f}.icon-button-danger:hover:not(:disabled) svg{color:#dc2626}.icon-button:disabled{opacity:.4;cursor:not-allowed}.task-compare{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}.preview-column{display:flex;flex-direction:column;gap:6px}.preview-label{font-size:.72rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px}.preview-surface{position:relative;border-radius:var(--radius-sm);overflow:hidden;background:var(--bg);border:1px solid var(--border);aspect-ratio:1;display:flex;align-items:center;justify-content:center}.preview-surface-result,.preview-surface.is-transparent-preview{background:repeating-conic-gradient(#e8e8e8 0% 25%,#fff 0% 50%) 0 0 / 14px 14px}.preview-surface.is-dark-bg{border-color:#ffffff1a}.preview-surface img{width:100%;height:100%;object-fit:contain}.preview-zoom-button{width:100%;height:100%;padding:0;border:0;background:transparent;cursor:zoom-in;display:block}.preview-zoom-button:focus-visible{outline:3px solid rgba(31,122,224,.45);outline-offset:-3px}.preview-zoom-button img{display:block;transition:transform var(--transition)}.preview-zoom-button:hover img{transform:scale(1.04)}.preview-placeholder{font-size:.78rem;color:var(--text-muted);text-align:center;padding:20px}.task-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:6px 12px;margin-bottom:12px;padding:10px 12px;background:var(--bg);border-radius:var(--radius-sm)}.meta-item{display:flex;justify-content:space-between;align-items:center;font-size:.78rem}.meta-item span{color:var(--text-muted)}.meta-item strong{color:var(--text);font-weight:500}.task-progress{margin-bottom:12px}.task-progress-text{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;margin-bottom:6px}.task-progress-text span{color:var(--text-muted)}.task-progress-text strong{color:var(--primary);font-weight:600}.mini-progress{height:3px;background:var(--bg);border-radius:2px;overflow:hidden}.mini-progress span{display:block;height:100%;background:linear-gradient(90deg,var(--primary),#49a7ff);border-radius:2px;transition:width .3s ease}.task-actions{display:flex;gap:8px}.has-image-preview{overflow:hidden}.image-preview-modal{position:fixed;inset:0;z-index:10000;padding:24px;background:#0f172ab8;display:flex;align-items:center;justify-content:center}.image-preview-dialog{width:min(100%,980px);max-height:calc(100vh - 48px);background:var(--bg-white);border-radius:var(--radius-lg);box-shadow:0 24px 80px #0f172a59;display:flex;flex-direction:column;overflow:hidden}.image-preview-header,.image-preview-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 16px}.image-preview-header{border-bottom:1px solid var(--border)}.image-preview-header strong{min-width:0;color:var(--text);font-size:.95rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.image-preview-close{width:34px;height:34px;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text-secondary);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.image-preview-close:hover{color:var(--text);border-color:var(--border-hover)}.image-preview-close svg{width:18px;height:18px}.image-preview-stage{min-height:280px;max-height:calc(100vh - 190px);padding:18px;display:flex;align-items:center;justify-content:center;overflow:auto;background:var(--bg)}.image-preview-stage.is-transparent-preview{background:repeating-conic-gradient(#e8e8e8 0% 25%,#fff 0% 50%) 0 0 / 18px 18px}.image-preview-stage.is-dark-bg{background:#111827}.image-preview-stage img{max-width:100%;max-height:calc(100vh - 230px);object-fit:contain}.image-preview-footer{border-top:1px solid var(--border)}.image-preview-footer span{color:var(--text-muted);font-size:.82rem}.mini-button{padding:6px 14px;border:none;border-radius:8px;background:linear-gradient(135deg,var(--primary),#49a7ff);color:#fff;font-size:.8rem;font-weight:500;cursor:pointer;transition:all var(--transition)}.mini-button:hover:not(:disabled){box-shadow:0 4px 12px #1f7ae04d;transform:translateY(-1px)}.mini-button:disabled{opacity:.5;cursor:not-allowed}.mini-button-ghost{background:transparent;color:var(--primary);border:1px solid var(--border-hover)}.mini-button-ghost:hover:not(:disabled){background:var(--primary-light);box-shadow:none}.swatch-name{display:block;font-size:.68rem;color:var(--text-muted);text-align:center;margin-top:4px;line-height:1.2}.swatch-toggle{width:auto;padding:3px 8px;border:2px dashed var(--border);border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center}.swatch-toggle:hover{border-color:var(--border-hover)}.swatch-toggle.is-active{border-color:var(--primary);border-style:solid}.swatch-pattern-toggle{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;background:var(--bg);font-size:1rem;font-weight:600;color:var(--text-muted)}.swatch-pattern.is-custom-color{position:relative}.swatch-pattern.is-custom-color:after{content:"";position:absolute;inset:0;border-radius:6px;border:1px dashed rgba(0,0,0,.15)}.is-custom-swatch .swatch-pattern{position:relative}.upload-feedback.is-error{color:#dc2626}.upload-feedback.is-success{color:#16a34a}.sample-block{margin-top:10px;text-align:center}.sample-title{font-size:.76rem;color:var(--text-muted);margin-bottom:8px}.sample-gallery{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}.sample-thumb{display:block;width:58px;height:58px;aspect-ratio:1 / 1;padding:0;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:var(--bg-white);cursor:pointer;box-shadow:var(--shadow-sm);transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition)}.sample-thumb:hover,.sample-thumb:focus-visible{border-color:var(--border-hover);box-shadow:0 12px 28px #192e541a;outline:none;transform:translateY(-2px)}.sample-thumb img{display:block;width:100%;height:100%;object-fit:cover}.dropzone-panel.is-error{border-color:#ef444466;background:#ef44440a}.dropzone-panel.is-dragging{border-color:var(--primary);background:#1f7ae01f;transform:scale(1.01)}.size-current.is-expanded{border-color:var(--primary)}.size-field.is-disabled{opacity:.5}.content-section{max-width:1400px;margin:0 auto;padding:60px 24px}.section-heading{text-align:center;margin-bottom:40px}.eyebrow{display:inline-block;padding:4px 14px;background:var(--primary-light);color:var(--primary);font-size:.78rem;font-weight:600;border-radius:999px;margin-bottom:12px}.section-heading h2{font-size:1.6rem;font-weight:700;color:var(--text)}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.info-card{padding:24px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition)}.info-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.info-card h3{font-size:1rem;font-weight:600;color:var(--text);margin-bottom:8px}.info-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.step-card{padding:28px 24px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);text-align:center;position:relative;transition:all var(--transition)}.step-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.step-card>span{display:inline-block;width:40px;height:40px;line-height:40px;background:linear-gradient(135deg,var(--primary),#49a7ff);color:#fff;border-radius:50%;font-size:.9rem;font-weight:700;margin-bottom:14px}.step-card h3{font-size:1.05rem;font-weight:600;color:var(--text);margin-bottom:8px}.step-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.scenario-card{padding:24px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);transition:all var(--transition)}.scenario-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-sm);transform:translateY(-2px)}.scenario-card h3{font-size:1rem;font-weight:600;color:var(--text);margin-bottom:8px}.scenario-card p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}.seo-guide-section{padding-top:36px}.seo-guide-section .section-heading>p:not(.eyebrow){max-width:760px;margin:12px auto 0;color:var(--text-secondary);line-height:1.75}.seo-guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.seo-guide-card{padding:24px;background:var(--bg-white);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.seo-guide-card 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