:root{--color-bg: #F8F6F1;--color-bg-elevated: #FFFFFF;--color-ink: #1A1D1F;--color-ink-muted: #5C6063;--color-border: #E8E3D8;--color-border-subtle: #F0EDE5;--color-primary: #0F3D2E;--color-primary-hover: #1A5240;--color-primary-soft: #E8F0EC;--color-accent: #C8956D;--color-accent-hover: #B0825C;--color-success: #16654A;--color-warning: #C77E2A;--color-error: #B83A3A;--font-display-zh: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;--font-body-zh: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--font-display-en: "Fraunces", "Newsreader", Georgia, serif;--font-body-en: "Inter", system-ui, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, monospace;--text-7xl: clamp(2.75rem, 5vw + 1rem, 4.5rem);--text-6xl: clamp(2.25rem, 4vw + .5rem, 3.5rem);--text-5xl: clamp(1.875rem, 3vw + .5rem, 2.75rem);--text-4xl: clamp(1.625rem, 2.5vw + .5rem, 2.25rem);--text-3xl: clamp(1.375rem, 2vw + .25rem, 1.75rem);--text-2xl: clamp(1.25rem, 1.5vw + .25rem, 1.375rem);--text-xl: clamp(1.0625rem, 1vw + .25rem, 1.125rem);--text-base: clamp(.9375rem, .8vw + .25rem, 1rem);--text-sm: clamp(.8125rem, .7vw + .2rem, .875rem);--text-xs: .75rem;--leading-tight: 1.15;--leading-snug: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.7;--leading-loose: 1.75;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--space-12: 3rem;--space-16: 4rem;--space-24: 6rem;--space-32: 8rem;--container-max: 1200px;--container-prose: 720px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--transition-fast: .15s ease-out;--transition-base: .2s ease-out;--transition-slow: .4s ease-out;--shadow-subtle: 0 1px 3px rgba(0, 0, 0, .04);--shadow-card: 0 2px 8px rgba(0, 0, 0, .06);--z-dropdown: 100;--z-sticky: 200;--z-modal-backdrop: 300;--z-modal: 400;--z-toast: 500}*,*: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-base);line-height:var(--leading-relaxed);color:var(--color-ink);background-color:var(--color-bg);min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:var(--font-display-zh);line-height:var(--leading-snug);color:var(--color-ink);text-wrap:balance}h1{font-size:var(--text-5xl)}h2{font-size:var(--text-4xl)}h3{font-size:var(--text-3xl)}h4{font-size:var(--text-2xl)}p{text-wrap:pretty;max-width:var(--container-prose)}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-6)}.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:var(--text-sm);font-weight:500;line-height:1;padding:var(--space-3) var(--space-6);border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:all var(--transition-base);text-decoration:none;white-space:nowrap}.btn--primary{background-color:var(--color-primary);color:var(--color-bg-elevated);border-color:var(--color-primary)}.btn--primary:hover{background-color:var(--color-primary-hover);border-color:var(--color-primary-hover);color:var(--color-bg-elevated)}.btn--outline{background-color:transparent;color:var(--color-primary);border-color:var(--color-primary)}.btn--outline:hover{background-color:var(--color-primary);color:var(--color-bg-elevated)}.btn--accent{background-color:var(--color-accent);color:var(--color-bg-elevated);border-color:var(--color-accent)}.btn--accent:hover{background-color:var(--color-accent-hover);border-color:var(--color-accent-hover)}.card{background-color:var(--color-bg-elevated);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:border-color var(--transition-base),transform var(--transition-base)}.card:hover{border-color:var(--color-primary);transform:translateY(-2px)}.section{padding-block:var(--space-24)}@media(max-width:768px){.section{padding-block:var(--space-16)}}.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-primary{color:var(--color-primary)}.text-accent{color:var(--color-accent)}.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}}