:root{--color-primary: #0A1F44;--color-primary-hover: #152D5E;--color-primary-soft: #E8ECF2;--color-accent: #C9A961;--color-accent-hover: #B8943F;--color-ink: #1A2B4A;--color-ink-body: #4A5568;--color-ink-muted: #6B7280;--color-bg: #FFFFFF;--color-bg-elevated: #FFFFFF;--color-bg-secondary: #F8F9FB;--color-bg-accent: #F5F1E8;--color-border: rgba(10, 31, 68, .08);--color-border-hover: rgba(10, 31, 68, .16);--color-success: #0F6E56;--color-warning: #BA7517;--color-error: #B83A3A;--font-display-zh: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;--font-body-zh: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;--font-body-en: "Inter", system-ui, -apple-system, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--text-h1: 2.5rem;--text-h2: 1.75rem;--text-h3: 1.125rem;--text-body: .9375rem;--text-sm: .8125rem;--text-xs: .75rem;--text-tag: .6875rem;--leading-h1: 1.25;--leading-h2: 1.3;--leading-h3: 1.4;--leading-body: 1.7;--leading-sm: 1.5;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--container-max: 1200px;--container-prose: 680px;--radius-sm: 2px;--radius-md: 8px;--radius-lg: 8px;--radius-full: 9999px;--transition-fast: .15s ease-out;--transition-base: .2s ease-out;--transition-slow: .4s ease-out;--shadow-card: 0 2px 8px rgba(10, 31, 68, .06);--z-dropdown: 100;--z-sticky: 200;--z-modal-backdrop: 300;--z-modal: 400;--z-toast: 500;--header-height: 64px}@media(max-width:768px){:root{--text-h1: 2rem;--text-h2: 1.5rem;--text-body: .875rem}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{font-family:var(--font-body-zh);font-size:var(--text-body);line-height:var(--leading-body);color:var(--color-ink-body);background-color:var(--color-bg);min-height:100vh;font-weight:400}h1,h2,h3,h4,h5,h6{font-family:var(--font-display-zh);color:var(--color-primary);font-weight:500;text-wrap:balance}h1{font-size:var(--text-h1);line-height:var(--leading-h1);letter-spacing:-.5px}h2{font-size:var(--text-h2);line-height:var(--leading-h2)}h3{font-size:var(--text-h3);line-height:var(--leading-h3)}p{text-wrap:pretty}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-hover)}img{max-width:100%;height:auto;display:block}.container{width:100%;max-width:var(--container-max);margin-inline:auto;padding-inline:var(--space-8)}@media(max-width:768px){.container{padding-inline:var(--space-5)}}.container--prose{max-width:var(--container-prose)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);font-family:var(--font-body-zh);font-size:.875rem;font-weight:500;line-height:1;padding:.875rem 1.5rem;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:background-color var(--transition-base),color var(--transition-base),border-color var(--transition-base);text-decoration:none;white-space:nowrap}.btn--primary{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}.btn--primary:hover{background-color:var(--color-primary-hover);border-color:var(--color-primary-hover);color:#fff}.btn--outline{background-color:transparent;color:var(--color-primary);border:1px solid var(--color-primary)}.btn--outline:hover{background-color:var(--color-primary);color:#fff}.btn--accent{background-color:var(--color-accent);color:var(--color-primary);border-color:var(--color-accent)}.btn--accent:hover{background-color:var(--color-accent-hover);border-color:var(--color-accent-hover)}.btn--sm{font-size:.75rem;padding:.5rem 1rem}.card{background-color:var(--color-bg-elevated);border:.5px solid var(--color-border);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--transition-base),transform var(--transition-base)}.card:hover{border-color:var(--color-border-hover);transform:translateY(-2px)}.section{padding-block:var(--space-16)}@media(min-width:769px){.section{padding-block:var(--space-20)}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}.text-muted{color:var(--color-ink-muted)}.text-body{color:var(--color-ink-body)}.text-primary{color:var(--color-primary)}.text-accent{color:var(--color-accent)}.section-title{font-size:var(--text-h2);font-weight:500;color:var(--color-primary);text-align:center}.section-subtitle{font-size:var(--text-body);color:var(--color-ink-muted);text-align:center;margin-top:var(--space-3)}.section-header{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:var(--space-8)}.section-header .view-all{font-size:var(--text-sm);font-weight:500;color:var(--color-primary)}.section-header .view-all:hover{color:var(--color-primary-hover)}.fade-up{opacity:0;transform:translateY(8px);transition:opacity var(--transition-slow),transform var(--transition-slow)}.fade-up.is-visible{opacity:1;transform:translateY(0)}@media(prefers-reduced-motion:reduce){.fade-up{opacity:1;transform:none;transition:none}}