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#1677FF;--brand-primary-rgb: 22, 119, 255;--brand-light: #E6F0FF;--brand-light-rgb: 230, 240, 255;--brand-title: #0E4299;--brand-deep: #0E4299;--bg-page: #F5F7FA;--bg-white: #FFFFFF;--bg-card: #FFFFFF;--bg-empty: #F5F7FA;--border-card: #DCDFE6;--border-input: #DCDFE6;--border-subtle: #DCDFE6;--text-placeholder: #C0C4CC;--text-disabled: #C0C4CC;--text-title: #303133;--text-body: #606266;--text-secondary: #909399;--text-primary: #303133;--text-tertiary: #909399;--color-success: #00B42A;--radius-sm: 4px;--radius-md: 4px;--radius-lg: 4px;--radius-xl: 4px;--shadow-card: 0 1px 4px rgba(0, 0, 0, .06);--shadow-hover: 0 2px 8px rgba(0, 0, 0, .1);--font-mono: "Cascadia Code", "Fira Code", "JetBrains Mono", "Consolas", monospace;--font-sans: system-ui, -apple-system, "Segoe UI", "Noto Sans SC", sans-serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: .875rem;--text-lg: 1rem;--text-xl: 1rem;--text-2xl: 1.125rem;--text-3xl: 1.125rem;--text-4xl: 1.5rem;--header-h: 64px;--max-width: 1200px;--ease-out-expo: cubic-bezier(.16, 1, .3, 1);--ease-spring: cubic-bezier(.34, 1.56, .64, 1)}body{font-size:var(--text-base)}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 clamp(1rem,4vw,2.5rem)}.section{padding:clamp(2rem,4vw,3rem) 0;position:relative}.section-header{text-align:center;margin-bottom:clamp(1.5rem,3vw,2rem)}.section-label{display:inline-block;font-size:var(--text-xs);font-weight:500;letter-spacing:.1em;color:var(--brand-primary);margin-bottom:.5rem;padding:.2em .8em;border:1px solid var(--brand-primary);border-radius:var(--radius-sm);background:var(--brand-light)}.section-title{font-size:var(--text-3xl);font-weight:500;color:var(--text-title);margin-bottom:.5rem}.section-desc{color:var(--text-secondary);font-size:var(--text-sm);max-width:600px;margin:0 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var(--brand-primary);border-radius:var(--radius-sm);color:var(--brand-primary);font-weight:500;font-size:var(--text-sm);background:transparent;transition:background .2s ease;cursor:pointer;text-decoration:none;line-height:1.4}.btn-outline:hover{background:var(--brand-light)}.tab-selected{background:var(--bg-white);border:1px solid var(--brand-primary);color:var(--brand-primary)}.tab-unselected{border:1px solid var(--border-card);color:var(--text-body)}