:root {
  --bg: #FAFAF9; --bg-alt: #F5F5F4; --surface: #FFFFFF; --border: #E7E5E4;
  --text: #1E293B; --text-secondary: #52525B; --text-muted: #71717A;
  --primary: #4F46E5; --primary-light: rgba(79, 70, 229, 0.08);
  --success: #059669; --radius: 10px; --radius-lg: 14px;
}
*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}
body{font-family:'Inter','Noto Sans SC',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}
.toast{position:fixed;top:24px;right:24px;background:var(--text);color:var(--bg);padding:10px 18px;border-radius:100px;font-size:14px;font-weight:500;display:flex;align-items:center;gap:8px;z-index:1000;transform:translateX(calc(100% + 40px));transition:transform .3s cubic-bezier(.34,1.56,.64,1);box-shadow:0 4px 16px rgba(0,0,0,0.12)}
.toast.show{transform:translateX(0)}.toast-dot{width:8px;height:8px;background:var(--success);border-radius:50%}
.page{max-width:960px;margin:0 auto;padding:0 32px}
::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f5f9}::-webkit-scrollbar-thumb{background:#A5B4FC;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#4F46E5}
::selection{background:rgba(79,70,229,.2);color:#1E293B}
.dp-section{padding:32px 0}
.dp-info-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:16px 20px;box-shadow:0 4px 12px rgba(0,0,0,.06);margin-bottom:24px}
.dp-info-text{font-size:14px;color:var(--text-secondary);line-height:1.7}
.dp-color-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:24px}
.dp-color-card{aspect-ratio:1;border-radius:var(--radius-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;transition:all .25s ease;border:3px solid transparent;box-shadow:0 4px 12px rgba(0,0,0,.1);position:relative;color:white;text-shadow:0 1px 2px rgba(0,0,0,.3)}
.dp-color-card:hover{transform:scale(1.05);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.dp-color-card.active{border-color:var(--primary);transform:scale(1.05);box-shadow:0 0 0 4px rgba(79,70,229,.25)}
.dp-color-name{font-size:16px;font-weight:700;margin-bottom:4px}
.dp-color-code{font-size:12px;font-family:'SF Mono',monospace;opacity:.8}
.dp-actions{text-align:center}
.dp-btn{padding:14px 36px;background:linear-gradient(135deg,#475569,#1e293b);border:1px solid transparent;border-radius:var(--radius);font-family:inherit;font-size:16px;font-weight:600;color:white;cursor:pointer;transition:all .15s ease;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.dp-btn:hover{box-shadow:0 4px 16px rgba(71,85,105,.4);transform:translateY(-1px)}
.dp-fullscreen{position:fixed;inset:0;z-index:9999;transition:background .3s ease}
.dp-fullscreen.hidden{display:none}
.dp-fullscreen-hint{position:absolute;bottom:40px;left:0;right:0;text-align:center;font-size:14px;pointer-events:none;color:rgba(255,255,255,.4);text-shadow:0 1px 3px rgba(0,0,0,.3)}
.guide-section{margin-top:24px;margin-bottom:64px;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.guide-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 20px;background:none;border:none;cursor:pointer;transition:background .15s ease}
.guide-toggle:hover{background:var(--bg-alt)}
.guide-toggle-title{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#1E293B}
.guide-toggle.open .toggle-arrow{transform:rotate(180deg)}
.toggle-arrow{transition:transform .2s ease;color:var(--text-muted)}
.guide-list{padding:0 20px 20px}.guide-list.hidden{display:none}
.guide-item{padding:16px 0;border-top:1px solid var(--border)}.guide-item:first-child{border-top:1px solid var(--border)}
.guide-item-title{font-size:14px;font-weight:600;color:#1E293B;margin-bottom:6px}
.guide-item-body{font-size:13px;color:var(--text-secondary);line-height:1.8}
@media(max-width:768px){.page{padding:0 16px}.dp-color-grid{grid-template-columns:repeat(2,1fr)}}