/* ================================
   颜色盲模拟器 - 自定义样式
   ================================ */
:root{--bg:#FAFAF9;--bg-alt:#F5F5F4;--surface:#FFFFFF;--border:#E7E5E4;--border-strong:#D6D3D1;--text:#1E293B;--text-secondary:#52525B;--text-muted:#71717A;--primary:#4F46E5;--primary-hover:#4338CA;--primary-light:rgba(79,70,229,.08);--secondary:#F97316;--accent:#EC4899;--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,.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}
#header.scrolled{background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 2px 20px rgba(0,0,0,.06)}
.tool-section{padding:24px 0}
.upload-area{background:var(--surface);border:2px dashed var(--border);border-radius:var(--radius-lg);padding:48px 32px;text-align:center;cursor:pointer;transition:all .3s ease}
.upload-area:hover{border-color:var(--primary);background:var(--primary-light)}
.upload-icon{width:48px;height:48px;margin:0 auto 16px;color:var(--text-muted)}
.upload-text{font-size:16px;font-weight:600;color:var(--text);margin-bottom:8px}
.upload-hint{font-size:13px;color:var(--text-muted)}

.cb-type-bar{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.cb-type-label{font-size:13px;font-weight:600;color:var(--text-secondary)}
.cb-type-btns{display:flex;gap:6px;flex-wrap:wrap}
.cb-type-btn{padding:8px 16px;background:transparent;border:1px solid var(--border);border-radius:100px;font-family:inherit;font-size:13px;font-weight:500;color:var(--text-muted);cursor:pointer;transition:all .15s ease}
.cb-type-btn:hover{border-color:rgba(79,70,229,.25);color:var(--primary)}
.cb-type-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}

.cb-compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.cb-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:0 4px 12px rgba(0,0,0,.06)}
.cb-panel-title{font-size:14px;font-weight:700;color:var(--text);padding:14px 18px;border-bottom:1px solid var(--border);background:var(--bg-alt)}
.cb-canvas-wrap{width:100%;min-height:200px;display:flex;align-items:center;justify-content:center;background:#f5f5f5;padding:16px}
.cb-canvas-wrap canvas{max-width:100%;display:block;border-radius:4px}

.btn-group{display:flex;gap:8px;justify-content:center}
.action-btn{padding:12px 32px;background:linear-gradient(135deg,#64748B 0%,#475569 100%);border:none;border-radius:100px;font-family:inherit;font-size:14px;font-weight:600;color:#fff;cursor:pointer;transition:all .15s ease;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.action-btn:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(0,0,0,.1)}

.guide-section{margin-top:16px;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}
::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f5f9}::-webkit-scrollbar-thumb{background:#A5B4FC;border-radius:4px}
::selection{background:rgba(79,70,229,.2);color:#1E293B}
@media(max-width:768px){.page{padding:0 16px}.cb-compare{grid-template-columns:1fr}}