:root{--bg:#0e0709;--bg-alt:#140a0d;--surface:#180c10;--surface-2:#1e0f14;--surface-3:#261219;--gold:#c9a227;--gold-hi:#e7cb82;--gold-lo:#8a6c1b;--line:#c9a22724;--line-2:#c9a22742;--line-3:#c9a22775;--crimson:#a11f28;--crimson-hi:#d0454b;--crimson-dim:#a11f2838;--fg:#ece3d6;--fg-2:#b0a291;--fg-3:#7d7265;--fg-4:#574d44;--font-display:"Smiley Sans Oblique", "Noto Sans CJK", system-ui, sans-serif;--font-text:"Noto Sans CJK", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;--step-display:clamp(3.25rem, 8.4vw, 7.5rem);--step-h1:clamp(2.1rem, 4.6vw, 3.4rem);--step-h2:clamp(1.5rem, 2.6vw, 2.1rem);--step-h3:clamp(1.05rem, 1.5vw, 1.25rem);--step-body:clamp(.95rem, 1.05vw, 1rem);--step-small:.83rem;--step-micro:.68rem;--rail:88px;--gutter:clamp(20px, 4vw, 56px);--shell:1240px;--section-y:clamp(64px, 9vw, 128px);--r-xs:2px;--r-sm:3px;--ease:cubic-bezier(.2, .6, .2, 1);--t:.16s var(--ease)}@media (prefers-reduced-motion:reduce){:root{--t:0s}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{background:var(--bg);color:var(--fg);font-family:var(--font-text);font-size:var(--step-body);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;margin:0;font-weight:350;line-height:1.85}img,svg{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:0;padding:0}::selection{background:var(--crimson);color:#fff}:focus-visible{outline:1px solid var(--gold);outline-offset:3px}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:.01em;margin:0;font-weight:400;line-height:1.14}p{margin:0}.micro{font-family:var(--font-text);font-size:var(--step-micro);letter-spacing:.2em;text-transform:uppercase;color:var(--gold);font-feature-settings:"tnum" 1;font-weight:500}.micro--dim{color:var(--fg-3)}.lede{color:var(--fg-2);max-width:62ch;font-size:clamp(1rem,1.35vw,1.15rem);line-height:1.95}.dim{color:var(--fg-2)}.hairline{background:var(--line);border:0;height:1px;margin:0}.tnum{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}.link{color:var(--fg);border-bottom:1px solid var(--line-2);transition:color var(--t), border-color var(--t)}.link:hover{color:var(--gold-hi);border-color:var(--line-3)}.golink{color:var(--gold);font-size:var(--step-small);letter-spacing:.06em;transition:color var(--t);align-items:center;gap:.5em;display:inline-flex}.golink svg{transition:transform var(--t)}.golink:hover{color:var(--gold-hi)}.golink:hover svg{transform:translate(3px)}.btn{font-size:var(--step-small);letter-spacing:.08em;border:1px solid var(--line-2);border-radius:var(--r-xs);color:var(--fg);transition:border-color var(--t), color var(--t), background-color var(--t);background:0 0;align-items:center;gap:.6em;padding:.7em 1.35em;display:inline-flex}.btn:hover{border-color:var(--line-3);color:var(--gold-hi)}.btn--solid{background:var(--crimson);border-color:var(--crimson);color:#fdf6ec}.btn--solid:hover{background:var(--crimson-hi);border-color:var(--crimson-hi);color:#fff}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:100;background:var(--surface-3);color:var(--gold-hi);border:1px solid var(--line-3);padding:.75em 1.25em;position:absolute;top:0;left:-9999px}.skip-link:focus{top:12px;left:12px}.mark svg{width:100%;height:100%}.mark svg path{fill:currentColor}.texture{pointer-events:none;z-index:0;position:absolute;inset:0;overflow:hidden}.texture svg{width:100%;height:100%}.main{margin-left:var(--rail);flex-direction:column;min-height:100dvh;display:flex}.shell{width:100%;max-width:var(--shell);padding-inline:var(--gutter);margin-inline:auto}.main>.shell:first-child{flex:1 0 auto}.rail{width:var(--rail);z-index:40;background:var(--bg-alt);border-right:1px solid var(--line);flex-direction:column;align-items:center;display:flex;position:fixed;inset:0 auto 0 0}.rail__brand{width:100%;height:var(--rail);border-bottom:1px solid var(--line);color:var(--gold);transition:color var(--t);justify-content:center;align-items:center;display:flex}.rail__brand:hover{color:var(--gold-hi)}.rail__brand .mark{width:30px;height:30px}.rail__nav{flex-direction:column;flex:auto;justify-content:center;gap:2px;width:100%;padding-block:16px;display:flex}.rail__item{color:var(--fg-3);transition:color var(--t), background-color var(--t);flex-direction:column;align-items:center;gap:5px;padding:13px 4px;display:flex;position:relative}.rail__item:before{content:"";background:var(--gold);width:2px;height:0;transition:height var(--t);position:absolute;top:50%;left:0;transform:translateY(-50%)}.rail__item:hover{color:var(--fg)}.rail__item[aria-current=page]{color:var(--gold);background:var(--surface)}.rail__item[aria-current=page]:before{height:26px}.rail__label{letter-spacing:.04em;writing-mode:horizontal-tb;font-size:.63rem;line-height:1.2}.rail__kicker{letter-spacing:.14em;text-transform:uppercase;color:var(--fg-4);transition:color var(--t);font-size:.5rem}.rail__item[aria-current=page] .rail__kicker{color:var(--gold-lo)}.rail__foot{border-top:1px solid var(--line);flex-direction:column;align-items:center;gap:2px;width:100%;padding-block:12px;display:flex}.rail__ext{width:40px;height:40px;color:var(--fg-3);transition:color var(--t), background-color var(--t);justify-content:center;align-items:center;display:flex}.rail__ext:hover{color:var(--gold);background:var(--surface)}.topbar{display:none}.section{padding-block:var(--section-y);position:relative}.section+.section{border-top:1px solid var(--line)}.section__head{grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);align-items:end;gap:clamp(20px,4vw,64px);margin-bottom:clamp(28px,4vw,52px);display:grid}.section__index{margin-bottom:12px;display:block}.section__title{font-size:var(--step-h2)}.section__note{color:var(--fg-2);font-size:var(--step-small);padding-bottom:.25rem;line-height:1.9}@media (width<=820px){.section__head{grid-template-columns:1fr;align-items:start;gap:14px}}.foot{border-top:1px solid var(--line);background:var(--bg-alt);margin-top:auto;padding-block:clamp(36px,5vw,56px)}.foot__grid{grid-template-columns:minmax(0,1.3fr) repeat(2,minmax(0,1fr));gap:clamp(24px,4vw,56px);display:grid}.foot__col h3{font-family:var(--font-text);font-size:var(--step-micro);letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-bottom:14px;font-weight:500}.foot__col ul{font-size:var(--step-small);color:var(--fg-2);flex-direction:column;gap:9px;margin:0;padding:0;list-style:none;display:flex}.foot__brand{color:var(--gold);align-items:center;gap:12px;margin-bottom:16px;display:flex}.foot__brand .mark{width:26px;height:26px}.foot__brandline{font-family:var(--font-display);color:var(--fg);font-size:1.35rem;line-height:1}.foot__legal{border-top:1px solid var(--line);color:var(--fg-4);flex-wrap:wrap;justify-content:space-between;gap:8px 24px;margin-top:clamp(28px,4vw,44px);padding-top:20px;font-size:.74rem;line-height:1.9;display:flex}@media (width<=820px){.foot__grid{grid-template-columns:1fr}}@media (width<=960px){.rail{border-right:0;border-top:1px solid var(--line-2);backdrop-filter:blur(10px);background:#0e0709f0;flex-direction:row;width:100%;height:62px;inset:auto 0 0}.rail__brand,.rail__foot{display:none}.rail__nav{flex-direction:row;justify-content:space-around;align-items:stretch;gap:0;padding:0}.rail__item{flex:1 1 0;gap:3px;padding:9px 2px}.rail__item:before{width:0;height:2px;top:0;left:50%;transform:translate(-50%)}.rail__item[aria-current=page]:before{width:30px;height:2px}.rail__kicker{display:none}.rail__label{font-size:.66rem}.topbar{z-index:30;height:54px;padding-inline:var(--gutter);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);background:#0e0709f0;justify-content:space-between;align-items:center;gap:16px;display:flex;position:sticky;top:0}.topbar__brand{color:var(--gold);align-items:center;gap:10px;display:flex}.topbar__brand .mark{width:22px;height:22px}.topbar__title{font-family:var(--font-display);color:var(--fg);font-size:1rem;line-height:1}.topbar__ext{color:var(--fg-3);align-items:center;gap:4px;display:flex}.main{margin-left:0;padding-bottom:62px}}.copy-toast[data-astro-cid-wv7whodv]{z-index:60;background:var(--surface-3);border:1px solid var(--line-3);border-radius:var(--r-xs);color:var(--gold-hi);letter-spacing:.06em;opacity:0;pointer-events:none;transition:opacity var(--t);padding:.6em 1.1em;font-size:.78rem;position:fixed;bottom:88px;left:50%;transform:translate(-50%)translateY(6px)}.copy-toast[data-astro-cid-wv7whodv][data-show]{opacity:1;transform:translate(-50%)translateY(0)}@media (width<=960px){.copy-toast[data-astro-cid-wv7whodv]{bottom:78px}}