:root{color-scheme:light;--ds-bg:#f3f5fb;--ds-panel:#fcfdff;--ds-ink:#121827;--ds-muted:#68738b;--ds-line:#dce2ef;--ds-accent:#6e5bff;--ds-cyan:#54d5ff;--ds-danger:#e5485d;--ds-radius:14px;--ds-shadow:0 18px 50px rgba(30,40,75,.08);--ds-ui:Inter,"SF Pro Text","Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;--ds-mono:"SFMono-Regular",Consolas,"Liberation Mono",monospace}
html.dark,html[data-theme="dark"]{color-scheme:dark;--ds-bg:#0b1020;--ds-panel:#121a2e;--ds-ink:#eef2ff;--ds-muted:#9aa6bf;--ds-line:#27334f;--ds-shadow:0 22px 60px rgba(0,0,0,.28)}
*,*::before,*::after{box-sizing:border-box}
html{font-family:var(--ds-ui);text-rendering:optimizeLegibility}
:where(button,input,select,textarea,a):focus-visible{outline:3px solid color-mix(in srgb,var(--ds-accent) 42%,transparent);outline-offset:3px}
.skip-link{position:fixed;z-index:10000;top:10px;left:10px;transform:translateY(-150%);padding:10px 14px;border-radius:9px;background:var(--ds-ink);color:var(--ds-panel);font-weight:750;text-decoration:none;transition:transform .16s ease}
.skip-link:focus{transform:translateY(0)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.section-track{display:block;width:58px;height:2px;background:linear-gradient(90deg,var(--ds-accent),var(--ds-cyan));border-radius:2px}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}