:root{--bg-page: #f6f5f2;--bg-card: #ffffff;--bg-subtle: #f1efe9;--bg-hover: #eae6dd;--text-main: #18181b;--text-secondary: #52525b;--text-muted: #71717a;--border-color: #e4e2dd;--border-strong: #d1cec7;--accent-seal: #c81e1e;--accent-seal-hover: #a81515;--accent-seal-soft: #fef2f2;--accent-ink: #1e293b;--accent-blue: #1d4ed8;--accent-gold: #b45309;--success: #15803d;--success-bg: #dcfce7;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--shadow-sm: 0 1px 3px rgba(24, 24, 27, .06);--shadow-md: 0 8px 24px -4px rgba(24, 24, 27, .08);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-page);color:var(--text-main);line-height:1.5;-webkit-font-smoothing:antialiased;padding-bottom:48px}.container{max-width:1360px;margin:0 auto;padding:0 20px}.top-header{position:sticky;top:0;z-index:40;background:#ffffffeb;backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);padding:12px 0}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px}.brand-logo{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,#dc2626,#991b1b);color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px #c81e1e47;border:1.5px solid #fca5a5}.brand-title h1{font-size:19px;font-weight:800;letter-spacing:-.02em;display:flex;align-items:center;gap:8px}.brand-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--accent-seal-soft);color:var(--accent-seal);border:1px solid #fecaca}.brand-subtitle{font-size:12.5px;color:var(--text-secondary)}.header-pills{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.status-pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 11px;border-radius:999px;background:var(--bg-subtle);color:var(--text-secondary);border:1px solid var(--border-color)}.status-pill.ok{background:var(--success-bg);color:var(--success);border-color:#86efac}.pulse-dot{width:7px;height:7px;border-radius:50%;background:currentColor}.lang-switcher{display:inline-flex;background:var(--bg-subtle);padding:3px;border-radius:999px;border:1px solid var(--border-color);gap:2px}.lang-btn{border:none;background:transparent;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:700;color:var(--text-secondary);cursor:pointer;transition:all .14s ease}.lang-btn:hover{color:var(--text-main)}.lang-btn.active{background:var(--bg-card);color:var(--accent-seal);box-shadow:var(--shadow-sm)}.mode-selector-bar{margin-top:18px;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.mode-card-btn{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--bg-card);border:1.5px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;text-align:left;transition:all .16s ease;box-shadow:var(--shadow-sm)}.mode-card-btn:hover{border-color:var(--border-strong);transform:translateY(-1px)}.mode-card-btn.active{border-color:var(--accent-seal);background:var(--accent-seal-soft);box-shadow:0 4px 14px #c81e1e1f}.mode-icon{font-size:24px;line-height:1;flex-shrink:0}.mode-title{font-size:14px;font-weight:700;color:var(--text-main)}.mode-desc{font-size:11.5px;color:var(--text-secondary);margin-top:2px}.workstation-layout{margin-top:16px;display:grid;grid-template-columns:430px 1fr;gap:18px;align-items:start}@media(max-width:1040px){.mode-selector-bar{grid-template-columns:repeat(2,1fr)}.workstation-layout{grid-template-columns:1fr}}@media(max-width:580px){.mode-selector-bar{grid-template-columns:1fr}}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}.card-section{padding:16px 18px;border-bottom:1px solid var(--border-color)}.card-section:last-child{border-bottom:none}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.section-title{font-size:13.5px;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:6px}.section-badge{font-size:11px;font-weight:600;padding:2px 7px;border-radius:6px;background:var(--bg-subtle);color:var(--text-secondary)}.dropzone{border:2px dashed var(--border-strong);border-radius:var(--radius-md);padding:16px 14px;text-align:center;background:var(--bg-subtle);cursor:pointer;transition:all .15s ease}.dropzone:hover,.dropzone.dragover{border-color:var(--accent-seal);background:var(--accent-seal-soft)}.dropzone-main{font-size:13.5px;font-weight:700;color:var(--text-main)}.dropzone-sub{font-size:11.5px;color:var(--text-secondary);margin-top:3px}.sample-presets-grid{margin-top:10px;display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.preset-chip{font-size:11.5px;font-weight:600;padding:7px 9px;border-radius:var(--radius-sm);border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-main);cursor:pointer;text-align:left;transition:all .14s ease;display:flex;align-items:center;gap:5px}.preset-chip:hover{border-color:var(--accent-seal);background:var(--accent-seal-soft)}.preset-chip.active{border-color:var(--accent-seal);background:var(--accent-seal);color:#fff}.switch-list{display:flex;flex-direction:column;gap:10px}.switch-item{background:var(--bg-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:10px 12px;transition:border-color .15s ease}.switch-item.active-feature{border-color:#fca5a5;background:snow}.switch-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.switch-label-group{flex:1}.switch-name{font-size:13px;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:6px}.switch-hint{font-size:11.5px;color:var(--text-secondary);margin-top:2px}.toggle-wrap{position:relative;display:inline-block;width:42px;height:24px;flex-shrink:0}.toggle-wrap input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;inset:0;background-color:#d4d4d8;transition:.2s;border-radius:999px}.toggle-slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:#fff;transition:.2s;border-radius:50%;box-shadow:0 1px 3px #0003}.toggle-wrap input:checked+.toggle-slider{background-color:var(--accent-seal)}.toggle-wrap input:checked+.toggle-slider:before{transform:translate(18px)}.sub-control{margin-top:8px;padding-top:8px;border-top:1px dashed var(--border-color)}.slider-row{display:flex;flex-direction:column;gap:4px;margin-bottom:10px}.slider-row:last-child{margin-bottom:0}.slider-row-mt{margin-top:8px}.slider-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:600;color:var(--text-main)}.slider-val{font-family:var(--font-mono);font-size:11.5px;color:var(--accent-seal);font-weight:700}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:999px;background:#dedad2;outline:none}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent-seal);cursor:pointer;border:2px solid #fff;box-shadow:0 1px 4px #00000040}.color-palette-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-top:6px}.color-swatch-btn{display:inline-flex;align-items:center;gap:5px;padding:5px 9px;border-radius:8px;border:1.5px solid var(--border-color);background:var(--bg-card);font-size:11.5px;font-weight:600;cursor:pointer;transition:all .14s ease}.color-swatch-btn.active{border-color:var(--accent-seal);background:var(--accent-seal-soft);color:var(--accent-seal)}.swatch-dot{width:13px;height:13px;border-radius:50%;border:1px solid rgba(0,0,0,.15);flex-shrink:0}.swatch-dot.orig{background:conic-gradient(#ef4444,#3b82f6,#10b981,#ef4444)}.swatch-dot.black{background:#12161f}.swatch-dot.blue{background:#0f3a7d}.swatch-dot.cinnabar{background:#cc1a1a}.swatch-dot.red{background:#e11d2e}.swatch-dot.gold{background:linear-gradient(135deg,#f59e0b,#b45309,#fde047)}.custom-color-input{width:28px;height:28px;border:1px solid var(--border-color);border-radius:6px;padding:1px;cursor:pointer;background:var(--bg-card)}.stage-card{display:flex;flex-direction:column}.stage-toolbar{padding:12px 18px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--bg-card)}.view-tabs{display:inline-flex;background:var(--bg-subtle);padding:3px;border-radius:10px;border:1px solid var(--border-color);gap:3px;flex-wrap:wrap}.view-tab-btn{border:none;background:transparent;padding:6px 11px;border-radius:7px;font-size:12px;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all .14s ease}.view-tab-btn.active{background:var(--bg-card);color:var(--text-main);box-shadow:var(--shadow-sm)}.stage-metrics-bar{display:flex;align-items:center;gap:12px;font-size:12px;color:var(--text-secondary);font-family:var(--font-mono)}.metric-chip{background:var(--bg-subtle);padding:3px 8px;border-radius:6px;border:1px solid var(--border-color)}.metric-chip strong{color:var(--text-main)}.stage-viewport{position:relative;min-height:490px;display:flex;align-items:center;justify-content:center;padding:24px;overflow:hidden;user-select:none}.stage-viewport.bg-checker{background-color:#fff;background-image:linear-gradient(45deg,#e5e7eb 25%,transparent 25%),linear-gradient(-45deg,#e5e7eb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e5e7eb 75%),linear-gradient(-45deg,transparent 75%,#e5e7eb 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}.stage-viewport.bg-xuan{background:radial-gradient(circle at 30% 20%,#fdfbf7,#f5ebd6 65%,#eadbbd)}.stage-viewport.bg-dark{background:#0f172a}.stage-viewport.bg-contract{background:#e2e8f0}.canvas-wrapper{position:relative;max-width:100%;max-height:540px;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 8px 30px #00000014;border-radius:8px;overflow:hidden}.canvas-wrapper canvas{display:block;max-width:100%;max-height:520px;width:auto;height:auto;object-fit:contain;cursor:grab}.canvas-wrapper canvas:active{cursor:grabbing}.split-badge-left,.split-badge-right{position:absolute;top:10px;padding:3px 9px;border-radius:6px;font-size:11px;font-weight:700;background:#18181bb8;color:#fff;pointer-events:none}.split-badge-left{left:10px}.split-badge-right{right:10px}.contract-controls-bar{position:absolute;bottom:14px;left:50%;transform:translate(-50%);background:#fffffff2;backdrop-filter:blur(8px);border:1px solid var(--border-strong);border-radius:999px;padding:7px 16px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-md);font-size:12px;font-weight:600;z-index:15}.contract-controls-bar label{display:inline-flex;align-items:center;gap:6px}.contract-controls-bar input[type=range]{width:85px}.export-bar{padding:16px 20px;border-top:1px solid var(--border-color);background:var(--bg-subtle);display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.export-stats{display:flex;flex-direction:column;gap:3px}.export-stats-main{font-size:13px;font-weight:700;color:var(--text-main)}.export-stats-sub{font-size:11.5px;color:var(--text-secondary)}.export-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;font-size:13px;font-weight:700;padding:10px 16px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all .15s ease}.btn-primary{background:var(--accent-seal);color:#fff;box-shadow:0 2px 8px #c81e1e40}.btn-primary:hover{background:var(--accent-seal-hover)}.btn-secondary{background:var(--bg-card);color:var(--text-main);border-color:var(--border-strong)}.btn-secondary:hover{background:var(--bg-hover)}.btn-ink{background:var(--accent-ink);color:#fff}.btn-ink:hover{background:#0f172a}.btn-sm{padding:5px 10px;font-size:11.5px}.svg-preview-drawer{border-top:1px solid var(--border-color);padding:14px 20px;background:#fafafa}.svg-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-size:12.5px;font-weight:700}.svg-code-box{width:100%;height:76px;font-family:var(--font-mono);font-size:11px;padding:8px 10px;border-radius:var(--radius-sm);border:1px solid var(--border-color);background:#fff;color:var(--text-secondary);resize:vertical}.seo-section{margin-top:28px;display:flex;flex-direction:column;gap:18px}.seo-section .card{padding:24px 28px}.seo-eyebrow{font-size:11.5px;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--accent-seal);margin-bottom:6px}.seo-h2{font-size:20px;font-weight:800;color:var(--text-main);margin-bottom:12px}.seo-h3{font-size:16px;font-weight:700;color:var(--text-main);margin:18px 0 10px}.intro-copy,.content-lead{font-size:14px;color:var(--text-secondary);line-height:1.68;margin-bottom:10px}.seo-steps-list{padding-left:20px;display:flex;flex-direction:column;gap:8px;font-size:13.5px;color:var(--text-secondary)}.faq-list{display:flex;flex-direction:column;gap:14px}.faq-item{padding:14px 16px;border-radius:var(--radius-md);background:var(--bg-subtle);border:1px solid var(--border-color)}.faq-item dt{font-size:14px;font-weight:700;color:var(--text-main);margin-bottom:6px}.faq-item dd{font-size:13.5px;color:var(--text-secondary);line-height:1.62}.promo-showcase{margin-top:24px}.llmland-ad-frame{width:100%;border:none;border-radius:var(--radius-lg);display:block;background:transparent}.is-hidden{display:none!important}