/* ============ 自托管字体（国内访问 Google Fonts 不稳定，故本地托管）============ */
/* 只包含拉丁字符子集，中文自动落到系统字体（苹方 / 微软雅黑），不额外增加体积 */
@font-face{font-family:'Archivo';font-style:normal;font-weight:500;font-display:swap;
  src:url('fonts/archivo-latin-500-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Archivo';font-style:normal;font-weight:600;font-display:swap;
  src:url('fonts/archivo-latin-600-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Archivo';font-style:normal;font-weight:700;font-display:swap;
  src:url('fonts/archivo-latin-700-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Source Sans 3';font-style:normal;font-weight:400;font-display:swap;
  src:url('fonts/source-sans-3-latin-400-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'Source Sans 3';font-style:normal;font-weight:600;font-display:swap;
  src:url('fonts/source-sans-3-latin-600-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:400;font-display:swap;
  src:url('fonts/jetbrains-mono-latin-400-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:500;font-display:swap;
  src:url('fonts/jetbrains-mono-latin-500-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
@font-face{font-family:'JetBrains Mono';font-style:normal;font-weight:700;font-display:swap;
  src:url('fonts/jetbrains-mono-latin-700-normal.woff2') format('woff2');
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}

/* ============ 全站导航 ============ */
.sitenav{position:sticky;top:0;z-index:200;background:color-mix(in srgb,var(--ground) 88%,transparent);
  backdrop-filter:saturate(150%) blur(12px);-webkit-backdrop-filter:saturate(150%) blur(12px);
  border-bottom:1px solid var(--line)}
.sitenav .in{max-width:1060px;margin:0 auto;padding:0 24px;height:58px;display:flex;align-items:center;gap:18px}
.sitenav .brand{font-family:var(--disp);font-weight:700;font-size:17px;letter-spacing:-.01em;
  color:var(--ink);text-decoration:none;white-space:nowrap;display:flex;align-items:center;gap:8px}
.sitenav .brand i{font-style:normal;color:var(--accent)}
.sitenav nav{margin-left:auto;display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.sitenav nav::-webkit-scrollbar{display:none}
.sitenav nav a{font-size:14.5px;color:var(--muted);text-decoration:none;padding:7px 11px;border-radius:5px;white-space:nowrap}
.sitenav nav a:hover{color:var(--ink);background:var(--surface-2)}
.sitenav nav a[aria-current="page"]{color:var(--accent);background:var(--accent-soft);font-weight:600}
@media (max-width:640px){
  .sitenav .in{height:auto;padding:10px 16px;flex-wrap:wrap;gap:8px}
  .sitenav nav{margin-left:0;width:100%;padding-bottom:2px}
  .sitenav nav a{padding:6px 9px;font-size:14px}
}

/* ============ 全站页脚 ============ */
.sitefoot{border-top:1px solid var(--line);background:var(--surface);margin-top:0}
.sitefoot .in{max-width:1060px;margin:0 auto;padding:40px 24px 34px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.sitefoot h4{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);margin:0 0 12px;font-weight:500}
.sitefoot p{margin:0 0 8px;font-size:14.5px;color:var(--muted);line-height:1.6}
.sitefoot .hd{font-family:var(--mono);font-size:15px;color:var(--ink);font-weight:600}
.sitefoot a{color:var(--muted);text-decoration:none;display:block;font-size:14.5px;line-height:2}
.sitefoot a:hover{color:var(--accent)}
.sitefoot .bar{max-width:1060px;margin:0 auto;padding:16px 24px 30px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--faint);font-family:var(--mono)}
.sitefoot .bar a{display:inline;color:var(--faint);font-size:13px}
@media (max-width:640px){.sitefoot .in{grid-template-columns:1fr;gap:22px;padding:30px 16px 26px}}

/* 让页面主体在导航之下正常滚动 */
html{scroll-behavior:smooth}