:root{--navy-950:#0b1830;--navy-900:#0f1f3d;--ink:#172d50;--text:#46546f;--muted:#5f6d86;--faint:#8a97ae;--on-dark:#c9d3e6;--on-dark-muted:#9fb0cc;--on-dark-strong:#dce6ff;--accent-light:#86a8ff;--blue:#2456c6;--blue-hover:#1b4299;--blue-bright:#2f63db;--blue-bright-hover:#2556c9;--blue-50:#e6eeff;--blue-100:#dfebff;--blue-200:#c9d8f7;--blue-tint:#f1f5ff;--rail-tint:#eef3fe;--white:#fff;--bg-soft:#f5f8fe;--surface-2:#f7f9fd;--track:#eef2fa;--line:#e2e8f3;--line-strong:#cbd6ea;--line-dash:#cfd8e8;--x-icon:#b7c0d0;--line-on-dark:#ffffff1f;--red:#b8321f;--red-50:#fdecea;--amber:#935400;--amber-50:#fff3da;--green:#12744a;--green-50:#e2f5ea;--green-bar:#34a36b;--star:#e0a100;--orange:#e07b39;--r-pill:999px;--r-xs:7px;--r-sm:10px;--r-md:12px;--r-lg:14px;--r-xl:20px;--r-2xl:22px;--r-3xl:28px;--shadow-card:0 1px 2px #172d500d, 0 16px 32px -20px #172d5038;--shadow-float:0 18px 40px -18px #172d504d, 0 2px 6px #172d500f;--shadow-hero-card:0 44px 90px -30px #0009, 0 0 0 1px #ffffff14;--shadow-input:0 18px 40px -18px #0009;--shadow-rail:0 16px 40px -14px #08143273, 0 0 0 1px #172d500f;--font-sans:"Plus Jakarta Sans", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;--font-brand:Arimo, Arial, "Helvetica Neue", Helvetica, sans-serif;--font-mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--lh-body:1.65;--container:1200px;--gutter:40px;--header-h:76px;--focus:var(--blue)}
:root{--font-sans:var(--nf-jakarta), ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;--font-brand:var(--nf-arimo), Arial, "Helvetica Neue", Helvetica, sans-serif;--font-mono:var(--nf-mono), ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--sidebar-w:248px;--topbar-h:64px;--content-max:1280px}:lang(zh){--lh-body:1.8;--font-sans:var(--nf-jakarta), "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif}*,:before,:after{box-sizing:border-box}html{-moz-text-size-adjust:100%;text-size-adjust:100%;font-family:var(--font-sans)}body{background:var(--bg-soft);min-height:100vh;color:var(--text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-size:15px;line-height:1.5;overflow-x:hidden}img,svg{display:block}h1,h2,h3,h4,p,ul,ol,figure,dl,dd{margin:0}ul,ol{padding:0;list-style:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}table{border-collapse:collapse}a{color:var(--blue)}a:hover{color:var(--blue-hover)}:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:4px}dialog{margin:auto}.mono{font-family:var(--font-mono);font-weight:500}.nowrap{white-space:nowrap}.sr-only{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.skip-link{z-index:100;border-radius:var(--r-sm);background:var(--white);color:var(--ink);box-shadow:var(--shadow-float);padding:10px 16px;font-weight:700;text-decoration:none;position:absolute;top:-100px;left:16px}.skip-link:focus{top:12px}:lang(zh) :is(h1,h2,h3){word-break:keep-all;overflow-wrap:break-word}