:root{color-scheme:dark;--page:#071b23;--surface:#0d2630;--text:#edf3f4;--muted:#b1c5cb;--gold:#efd098;--line:rgba(239,208,152,.22);--font:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:auto}
body{margin:0;background:var(--page);color:var(--text);font:1rem/1.8 var(--font);-webkit-text-size-adjust:100%}
a{color:var(--gold);text-decoration-thickness:.06em;text-underline-offset:.25em}
a:focus-visible{outline:3px solid var(--gold);outline-offset:5px}
.wrap{width:min(100% - 3rem,64rem);margin-inline:auto}
.skip-link{position:absolute;top:.5rem;left:.5rem;z-index:2;padding:.5rem 1rem;background:var(--surface);transform:translateY(-200%)}
.skip-link:focus{transform:none}
.site-header{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding-block:1.5rem;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:.75rem;text-decoration:none}
.brand img{display:block;flex:none}
.brand strong,.brand small{display:block}
.brand strong{font-size:1.125rem;letter-spacing:.1em}
.brand small{color:var(--muted);font-size:.75rem;line-height:1.6}
.header-link{font-size:.875rem;white-space:nowrap}
.intro{max-width:52rem;padding-block:4rem 3rem}
.eyebrow{margin:0 0 1rem;color:var(--gold);font-size:.875rem;font-weight:600;letter-spacing:.1em}
h1{margin:0;color:var(--gold);font-size:clamp(2rem,4vw,3rem);line-height:1.35;letter-spacing:.02em}
h1 span{display:block;margin-top:.5rem;color:var(--text);font-size:.8em;font-weight:500;letter-spacing:0}
.lead{max-width:44rem;margin:1.5rem 0 1rem;font-size:1.0625rem;color:var(--muted)}
.domain-note{margin:0;color:var(--muted);font-size:.875rem}
.domain-note b{color:var(--gold);overflow-wrap:anywhere}
.entry-actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.75rem}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:1.5rem;min-height:3rem;padding:.625rem 1.125rem;border:1px solid var(--gold);border-radius:.5rem;color:var(--gold);text-decoration:none;font-weight:600}
.button-primary{background:var(--gold);color:var(--page)}
.button:hover{background:var(--surface)}
.button-primary:hover{background:#f6dcac;color:var(--page)}
.features{border-top:1px solid var(--line)}
.section-heading{padding-block:2rem 1rem}
.section-heading .eyebrow{margin-bottom:.5rem}
h2{margin:0;font-size:clamp(1.25rem,2.5vw,1.5rem);line-height:1.5}
.feature{display:grid;grid-template-columns:3rem minmax(0,1fr) 5rem;align-items:start;gap:1rem;padding-block:1.5rem;border-bottom:1px solid var(--line)}
.feature-mark{display:grid;place-items:center;width:3rem;height:3rem;border:1px solid var(--line);border-radius:.5rem;color:var(--gold);font-size:1.5rem;line-height:1}
h3{margin:0 0 .5rem;font-size:1.0625rem;color:var(--gold);line-height:1.6}
.feature p{margin:0;color:var(--muted)}
.feature-label{padding-top:.25rem;font-size:.8125rem;color:var(--muted);text-align:right}
.reading-note{margin-block:2rem;padding:1.25rem 1.5rem;border-left:2px solid var(--gold);background:var(--surface)}
.reading-note strong{color:var(--gold)}
.reading-note p{margin:.375rem 0 0;color:var(--muted);font-size:.875rem}
.site-footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem 1.5rem;padding-block:1.5rem 2rem;border-top:1px solid var(--line);font-size:.8125rem;color:var(--muted)}
@media(max-width:540px){.wrap{width:calc(100% - 2rem)}.site-header{padding-block:1rem}.intro{padding-block:2.5rem 2rem}.entry-actions{flex-direction:column}.button{width:100%}.feature{grid-template-columns:2.5rem minmax(0,1fr);gap:.75rem}.feature-mark{width:2.5rem;height:2.5rem}.feature-label{display:none}.reading-note{padding:1rem}.site-footer{flex-direction:column}}