:root{--help-text-primary: #1F2937;--help-text-secondary: #6B7280;--help-bg-page: #F9FAFB;--help-bg-card: #FFFFFF;--help-border-color: #E5E7EB;--help-accent-purple: #7C3AED;--help-accent-purple-light: #A78BFA}.dark{--help-text-primary: #F3F4F6;--help-text-secondary: #9CA3AF;--help-bg-page: #09090B;--help-bg-card: #18181B;--help-border-color: #27272A}.help-page{font-family:Noto Sans SC,system-ui,sans-serif;background-color:var(--help-bg-page);color:var(--help-text-primary)}.serif-font{font-family:"Noto Serif SC",serif}.help-card{background-color:var(--help-bg-card);border:1px solid var(--help-border-color);border-radius:16px;padding:24px;transition:all .2s ease}.help-card:hover{box-shadow:0 4px 20px #00000014;transform:translateY(-2px)}.dark .help-card:hover{box-shadow:0 4px 20px #0000004d}.help-card-header{position:relative;z-index:1;-webkit-user-select:none;user-select:none}.help-content{max-height:0;overflow:hidden;transition:max-height .4s ease}.help-content.expanded{max-height:3000px}.expand-btn{transition:transform .2s ease}.expand-btn.rotated{transform:rotate(180deg)}.feature-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}.tip-box{background:linear-gradient(135deg,#7c3aed1a,#a78bfa1a);border:1px solid rgba(124,58,237,.2);border-radius:12px;padding:16px}.dark .tip-box{background:linear-gradient(135deg,#7c3aed33,#a78bfa26);border-color:#a78bfa4d}.search-box{background-color:var(--help-bg-card);border:1px solid var(--help-border-color)}.search-box:focus-within{border-color:var(--help-accent-purple);box-shadow:0 0 0 3px #7c3aed1a}.step-list{counter-reset:step;list-style:none;padding-left:0}.step-list li{position:relative;padding-left:32px;margin-bottom:8px}.step-list li:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,var(--help-accent-purple),var(--help-accent-purple-light));color:#fff;font-size:12px;font-weight:600;display:flex;align-items:center;justify-content:center}.feature-section{background-color:#7c3aed0d;border-radius:8px;padding:16px;margin-bottom:16px}.dark .feature-section{background-color:#7c3aed1a}.kbd{display:inline-block;padding:2px 6px;font-size:11px;font-family:monospace;background:var(--help-bg-page);border:1px solid var(--help-border-color);border-radius:4px}