:root{color-scheme:light;--font-heading:"Archivo", "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;--font-sans:"Space Grotesk", "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono:"JetBrains Mono", "Fira Code", monospace;--space:1.5rem;--page-gutter:clamp(1.25rem, 4vw, 4rem);--shell-max:1280px;--reading-layout-max:1280px;--content-max:calc(100vw - (var(--page-gutter) * 2));--layout-max:min(var(--shell-max), var(--content-max));--prose-max:min(96ch, var(--content-max));--type-base:1.0625rem;--type-body:1.0625rem;--type-body-sm:.9375rem;--type-kicker:.8125rem;--type-caption:.875rem;--transition:.22s ease}[data-theme=dark]{color-scheme:dark;--bg:#0f1219;--surface:#171c26;--border:#2a3344;--text:#e8ecf4;--text-muted:#95a0b5;--accent:#6b90ff;--accent-hover:#8aa8ff;--accent-soft:#6b90ff24;--gold:#c4a05a;--surface-raised-bg:#1e2430;--surface-raised-bg-end:#171c26;--surface-card:#1c222e;--surface-card-end:#151a24;--nav-bg:#0f1219eb;--radius:12px;--radius-lg:18px;--shadow-card-hover:0 0 0 1px #6b90ff29, 0 16px 48px #00000073;--shadow-inset:inset 0 1px 0 #ffffff0d;--shadow-cta:0 10px 28px #4f7cff52;--accent-soft-hover:#6b90ff42;--article-anchor-offset:6.75rem;--btn-primary-bg:linear-gradient(180deg, var(--accent), color-mix(in srgb, var(--accent) 72%, #0a0e16));--btn-primary-text:#f0f4ff;--btn-secondary-bg:color-mix(in srgb, var(--accent) 12%, var(--surface-card));--btn-secondary-border:color-mix(in srgb, var(--accent) 24%, var(--border));--btn-secondary-hover-border:color-mix(in srgb, var(--accent) 38%, var(--border));--nav-link-color:color-mix(in srgb, var(--text-muted) 85%, var(--text) 15%);--control-active-bg:color-mix(in srgb, var(--accent) 16%, var(--surface-card));--about-block-radius:calc(var(--radius-lg) - 6px)}[data-theme=warm]{color-scheme:light;--bg:#f5f4ed;--surface:#f0eee6;--border:#e8e6dc;--text:#141413;--text-muted:#5e5d59;--accent:#7a4423;--accent-hover:#5c3218;--accent-soft:#7a44231f;--gold:#9a7340;--surface-raised-bg:#faf9f5;--surface-raised-bg-end:#f5f4ed;--surface-card:#faf9f5;--surface-card-end:#f5f4ed;--nav-bg:#faf9f5eb;--radius:14px;--radius-lg:22px;--shadow-card-hover:0 0 0 1px #f0eee6, 0 16px 40px #14141314;--shadow-inset:inset 0 1px 0 #ffffff8c;--shadow-cta:0 10px 24px #5c321847;--accent-soft-hover:#7a44232e;--article-anchor-offset:7.5rem;--btn-primary-bg:linear-gradient(180deg, var(--accent), var(--accent-hover));--btn-primary-text:#fff7ef;--btn-secondary-bg:color-mix(in srgb, var(--accent) 14%, var(--surface-card));--btn-secondary-border:color-mix(in srgb, var(--accent) 28%, var(--border));--btn-secondary-hover-border:color-mix(in srgb, var(--accent) 42%, var(--border));--nav-link-color:color-mix(in srgb, var(--text-muted) 80%, var(--text) 20%);--control-active-bg:color-mix(in srgb, var(--accent) 14%, var(--surface-card));--about-block-radius:calc(var(--radius-lg) - 8px)}@media (width>=1400px){:root,[data-theme=dark],[data-theme=warm]{--prose-max:min(min(104ch, 1280px), var(--content-max))}}html{overflow-x:clip}body{max-width:100%;overflow-x:clip}@media (prefers-reduced-motion:reduce){:root,[data-theme=dark],[data-theme=warm]{--transition:0s}}@media (prefers-reduced-motion:no-preference){@keyframes fade-in-up{0%{opacity:0;transform:translateY(.5rem)}to{opacity:1;transform:translateY(0)}}.section-reveal{animation:.45s ease-out both 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var(--border);border-radius:var(--radius-lg,calc(var(--radius) + 8px));box-shadow:var(--shadow-card-hover)}.surface-inset{border-radius:calc(var(--radius-lg,calc(var(--radius) + 8px)) - 6px);box-shadow:var(--shadow-inset,none);background:#fffdf9b8;border:none}[data-theme=warm] .surface-inset{background:color-mix(in srgb, var(--surface-card) 94%, var(--accent) 2%);box-shadow:var(--shadow-inset)}[data-theme] .btn,[data-theme] .nav-links a{font-size:1rem}[data-theme] .cta-block p{color:color-mix(in srgb, var(--text-muted) 85%, var(--text) 15%);font-size:1.125rem}[data-theme] .site-footer-note,[data-theme] .footer{font-size:var(--type-body-sm)}[data-theme=dark] .surface-raised{background:linear-gradient(180deg, var(--surface-raised-bg), var(--surface-raised-bg-end))}[data-theme=dark] .surface-inset{background:color-mix(in srgb, var(--surface-card) 92%, var(--bg));box-shadow:var(--shadow-inset)}.nav{z-index:20;position:sticky}.nav-inner{max-width:var(--layout-max);border:1px solid var(--border);transition:box-shadow var(--transition), border-color var(--transition);justify-content:space-between;align-items:center;margin:0 auto;display:flex}.nav--scrolled .nav-inner{border-color:color-mix(in srgb, var(--accent) 22%, var(--border))}[data-theme=dark] .nav--scrolled .nav-inner{border-color:color-mix(in srgb, var(--accent) 32%, var(--border))}.nav-logo{font-family:var(--font-heading);color:var(--text);cursor:pointer;transition:color var(--transition);font-weight:700;text-decoration:none}.nav-logo:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.nav-links{flex-wrap:wrap;gap:2rem;margin:0;padding:0;list-style:none;display:flex}.nav-links a{color:var(--nav-link-color);white-space:nowrap;transition:color var(--transition);cursor:pointer;text-decoration:none}.nav-links a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;color:var(--accent)}.nav-menu-toggle{border:1px solid var(--border);border-radius:var(--radius);background:color-mix(in srgb, var(--surface) 85%, transparent);min-width:2.75rem;min-height:2.75rem;color:var(--text);cursor:pointer;transition:border-color var(--transition), background var(--transition);justify-content:center;align-items:center;padding:0;display:none}.nav-menu-toggle:hover{border-color:var(--accent);background:var(--accent-soft)}.nav-menu-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.nav-menu-toggle-bars{background:var(--text);width:1.25rem;height:2px;transition:background var(--transition);border-radius:1px;display:block;position:relative}.nav-menu-toggle-bars:before,.nav-menu-toggle-bars:after{content:"";background:var(--text);width:1.25rem;height:2px;transition:transform var(--transition), top var(--transition);border-radius:1px;position:absolute;left:0}.nav-menu-toggle-bars:before{top:-6px}.nav-menu-toggle-bars:after{top:6px}.nav-is-open .nav-menu-toggle-bars{background:0 0}.nav-is-open 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a:hover{color:var(--text);background:var(--accent-soft)}.theme-btn-active,.lang-switcher a[aria-current=page]{color:var(--accent-hover);background:var(--control-active-bg);font-weight:600}.theme-btn:focus-visible,.lang-switcher a:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.lang-switcher{align-items:center;gap:.25rem;display:flex}.lang-switcher a{text-decoration:none}.section-title{font-family:var(--font-heading);color:var(--text);margin-bottom:2rem;font-size:1.75rem;font-weight:700}.section-head{margin-bottom:2rem}.section-kicker{letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 .45rem;font-size:.78rem;font-weight:700}[data-theme] .section-kicker{font-size:var(--type-kicker);letter-spacing:.15em}[data-theme=warm] .section-kicker{color:var(--gold)}[data-theme=dark] .section-kicker{color:color-mix(in srgb, var(--accent) 70%, var(--gold))}.section-heading{font-family:var(--font-heading);color:var(--text);letter-spacing:-.02em;margin:0;font-size:clamp(1.5rem,3vw,1.85rem);font-weight:700;line-height:1.15}[data-theme] .section-heading{font-size:clamp(1.7rem,3.2vw,2.05rem);line-height:1.12}[data-theme=warm] .section-heading{letter-spacing:0}[data-theme=dark] .section-heading{letter-spacing:-.01em}.section-head:after{content:"";background:linear-gradient(90deg, var(--accent), transparent);opacity:.85;border-radius:999px;width:3rem;height:3px;margin-top:.85rem;display:block}[data-theme] .section-head{margin-bottom:1rem;padding-bottom:.85rem}[data-theme=warm] .section-head{border-bottom:1px solid color-mix(in srgb, var(--border) 70%, transparent)}[data-theme] .section-head:after{display:none}[data-theme=dark] .section-head{border-bottom:1px solid color-mix(in srgb, var(--accent) 18%, var(--border))}[data-theme=warm] .site-footer{border-top-color:color-mix(in srgb, var(--border) 90%, var(--accent) 10%);background:color-mix(in srgb, var(--surface) 86%, var(--border) 14%)}[data-theme=dark] .site-footer{border-top-color:color-mix(in srgb, var(--accent) 18%, var(--border));background:linear-gradient(180deg, color-mix(in srgb, var(--surface) 96%, var(--bg)), var(--bg))}.btn{cursor:pointer;border:none;text-decoration:none;display:inline-block}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.btn-primary{background:var(--btn-primary-bg);color:var(--btn-primary-text)}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--btn-secondary-bg);color:var(--text);border:1px solid var(--btn-secondary-border)}.btn-secondary:hover{background:var(--accent-soft-hover);border-color:var(--btn-secondary-hover-border)}.cta-block{text-align:center;background:var(--surface);border-top:1px solid var(--border);padding:2rem}.cta-block p{color:var(--text-muted);max-width:52ch;margin-bottom:1.5rem;margin-left:auto;margin-right:auto;font-size:1.05rem;line-height:1.65}.footer{border-top:1px solid var(--border);text-align:center;color:var(--text-muted);padding:2rem;font-size:.9rem}[data-theme] .inner-page-sections{flex-direction:column;gap:1rem;display:flex}[data-theme] .about-block{border-radius:var(--about-block-radius);background:linear-gradient(180deg, var(--surface-card), var(--surface-card-end));padding:1.25rem 1.35rem}[data-theme] .about-block h2{margin-bottom:.65rem;font-size:1.2rem}[data-theme] .about-block p,[data-theme] .about-block ul{font-size:var(--type-body-sm)}[data-theme=warm] .about-block{border:1px solid #f0eee6;box-shadow:0 0 0 1px #f0eee6}[data-theme=dark] .about-block{border:1px solid color-mix(in srgb, var(--border) 92%, transparent);box-shadow:0 0 0 1px #6b90ff14}[data-theme] .paper-card,[data-theme] .series-nav{background:linear-gradient(180deg, var(--surface-card), var(--surface-card-end))}[data-theme=dark] .paper-card,[data-theme=dark] .series-nav{border-color:color-mix(in srgb, var(--border) 92%, transparent);box-shadow:0 0 0 1px #6b90ff14}[data-theme=warm] .paper-card,[data-theme=warm] .series-nav{border-color:#f0eee6;box-shadow:0 0 0 1px #f0eee6}[data-theme=dark] .series-nav-link{background:color-mix(in srgb, var(--surface-card) 92%, var(--bg));border-color:color-mix(in srgb, var(--border) 88%, transparent)}[data-theme=dark] .series-nav-link:hover{border-color:color-mix(in srgb, var(--accent) 32%, var(--border))}@media (width<=900px){.nav{padding-left:max(.75rem, env(safe-area-inset-left));padding-right:max(.75rem, env(safe-area-inset-right));padding-top:max(.5rem, env(safe-area-inset-top))}.nav-inner{flex-wrap:wrap;align-items:center;gap:.5rem .75rem;padding:.85rem 1rem}.nav-logo{flex:auto;min-width:0}.nav-right{flex-shrink:1;gap:.5rem;min-width:0}.nav-search-link{display:none!important}.theme-btn,.lang-switcher a{padding:.35rem .5rem;font-size:.8rem}.nav-menu-toggle{flex-shrink:0;display:inline-flex}.nav-menu-panel{border-top:1px solid var(--border);flex-basis:100%;width:100%;margin-top:.15rem;padding-top:.65rem;display:none}.nav-is-open .nav-menu-panel{display:block}.nav-links{flex-direction:column;align-items:stretch;gap:0}.nav-links li{border-bottom:1px solid color-mix(in srgb, var(--border) 80%, transparent)}.nav-links .nav-search-menu-item{display:list-item}.nav-links li:last-child{border-bottom:none}.nav-links a{white-space:normal;padding:.85rem 0;font-size:1rem;display:block}.theme-btn,.lang-switcher a{justify-content:center;align-items:center;min-width:2.75rem;min-height:2.75rem;display:inline-flex}}@media (width>=901px){.nav-menu-toggle{display:none!important}.nav-menu-panel,.nav-is-open .nav-menu-panel{display:contents!important}.nav-logo{order:1}.nav-links{order:2}.nav-right{order:3}}.section-lead{max-width:42rem;color:var(--text-muted);margin:0 0 1rem;font-size:1.02rem;line-height:1.65}.section-cta-wrap{margin:0 0 1rem}.section-cta-wrap--bottom{margin-top:1rem;margin-bottom:0}.section-cta{color:var(--accent);transition:color var(--transition), transform var(--transition);align-items:center;gap:.2rem;font-size:.95rem;font-weight:600;text-decoration:none;display:inline-flex}.section-cta:hover{color:color-mix(in srgb, var(--accent) 82%, var(--text));transform:translate(3px)}.section-cta:focus-visible{outline:2px solid var(--accent);outline-offset:3px}[data-theme=warm]{--display-ink:#17120f;--ambient-a:#9a734021;--ambient-b:#7a442317;--editorial-line:color-mix(in srgb, var(--accent) 28%, var(--border));--editorial-shadow:0 24px 70px #3a27171a}[data-theme=dark]{--display-ink:#f5f7fb;--ambient-a:#6b90ff2e;--ambient-b:#c4a05a14;--editorial-line:color-mix(in srgb, var(--accent) 32%, var(--border));--editorial-shadow:0 30px 90px #00000061}body{background:radial-gradient(ellipse 70% 42% at 4% -8%, var(--ambient-a), transparent 72%), radial-gradient(ellipse 56% 34% at 96% 4%, var(--ambient-b), transparent 74%), linear-gradient(90deg, color-mix(in srgb, var(--border) 22%, transparent) 1px, transparent 1px), linear-gradient(180deg, color-mix(in srgb, var(--border) 18%, transparent) 1px, transparent 1px), var(--bg);background-size:auto,auto,72px 72px,72px 72px,auto;background-attachment:fixed}.main-content{isolation:isolate;padding-top:1rem;position:relative}.nav{border-bottom:1px solid color-mix(in srgb, var(--accent) 16%, var(--border));background:color-mix(in srgb, var(--nav-bg) 96%, transparent);box-shadow:0 8px 28px color-mix(in srgb, var(--text) 5%, transparent);-webkit-backdrop-filter:blur(18px)saturate(1.12);padding:0;top:0}.nav-inner{min-height:4.25rem;padding:.65rem var(--page-gutter);box-shadow:none;-webkit-backdrop-filter:none;background:0 0;border:0;border-radius:0}.nav-logo{letter-spacing:-.025em;align-items:center;gap:.55rem;padding-right:0;font-size:1.38rem;display:inline-flex}.brand-mark{border:1px solid color-mix(in srgb, var(--accent) 28%, var(--border));object-fit:cover;border-radius:50%;flex:none;width:2rem;height:2rem;display:block}.nav-links{background:color-mix(in srgb, var(--surface) 48%, transparent);border-radius:12px;gap:clamp(.35rem,1vw,.8rem);padding:.3rem}.nav-links a{border-radius:9px;align-items:center;min-height:2.55rem;padding:.35rem .85rem;font-size:.88rem;font-weight:600;display:inline-flex}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--text);background:color-mix(in srgb, var(--accent-soft) 78%, var(--surface-card))}.theme-switcher,.lang-switcher{border:1px solid color-mix(in srgb, var(--border) 75%, transparent);background:color-mix(in srgb, var(--surface) 72%, transparent);border-radius:999px;padding:.2rem}.btn{letter-spacing:.01em;min-height:2.9rem;transition:transform .18s ease, color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);border-radius:999px;padding:.7rem 1.15rem;font-weight:700}.btn-primary{border-color:var(--accent);box-shadow:0 12px 28px color-mix(in srgb, var(--accent) 28%, transparent)}.btn-secondary{background:color-mix(in srgb, var(--surface-card) 76%, transparent);backdrop-filter:blur(8px)}@media (hover:hover){.btn:hover{transform:translateY(-2px)}}:where(input,select,textarea):focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}@media (width<=640px){body{background-attachment:scroll}.nav{padding-top:env(safe-area-inset-top);top:0}.nav-inner{border-radius:0;flex-wrap:nowrap;gap:.35rem;min-height:3.75rem;padding:.45rem .55rem .45rem .75rem;position:relative}.nav-logo{flex:auto;font-size:1.05rem}.nav-logo .brand-mark{width:1.75rem;height:1.75rem}.nav-right{flex:none;gap:.2rem}.theme-switcher,.lang-switcher{gap:0;padding:.1rem}.theme-btn,.lang-switcher a{min-width:2.75rem;min-height:2.75rem;padding:.25rem .35rem;font-size:.72rem}.theme-switcher .theme-btn-active,.lang-switcher a[aria-current=page]{display:none}.nav-menu-toggle{border-radius:11px;width:2.75rem;min-width:2.75rem;height:2.75rem}.nav-menu-panel{z-index:30;border:1px solid var(--editorial-line);background:color-mix(in srgb, var(--nav-bg) 97%, var(--surface-card));width:auto;box-shadow:var(--editorial-shadow);backdrop-filter:blur(20px);border-radius:16px;margin:0;padding:.45rem .75rem;position:absolute;top:calc(100% + .55rem);left:0;right:0}.nav-links{background:0 0;padding:0}.nav-links a{min-height:2.75rem;padding:.65rem .35rem}.main-content{padding-top:.5rem}}@media (prefers-reduced-motion:reduce){.btn:hover{transform:none}}