.app-header{z-index:50;min-height:var(--header-height);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff0;grid-template-columns:196px minmax(620px,1fr) auto;align-items:center;gap:24px;padding:0 28px;display:grid;position:sticky;top:0}.app-header--cover{background:#051411f0;border-bottom-color:#b7e5d329}.app-header--cover .brand,.app-header--cover .primary-nav a,.app-header--cover .language-switch button[aria-pressed=true]{color:#e8f7f1}.app-header--cover .brand-mark{color:#a8e5d0;border-color:#78c8ad}.app-header--cover .primary-nav a:not([aria-current=page]),.app-header--cover .language-switch button,.app-header--cover .mode-switch button{color:#92aaa2}.app-header--cover .language-switch,.app-header--cover .mode-switch,.app-header--cover .icon-button{background:#0d2721c2;border-color:#b7e5d333}.app-header--cover .icon-button{color:#d8eee6}.app-header--cover .mode-switch button[aria-pressed=true]{color:#09231d;background:#cde9df}.app-header--cover .language-switch span{color:#536f66}.brand{color:var(--ink);align-items:center;gap:10px;text-decoration:none;display:flex}.brand-mark{border:1px solid var(--forest);width:28px;height:28px;color:var(--forest);font:600 11px/1 var(--font-display);place-items:center;display:grid;position:relative}.brand-mark i{background:var(--vermilion);border-radius:50%;width:6px;height:6px;position:absolute;transform:translate(8px,-8px)}.brand-name{font-size:11px;font-weight:750}.primary-nav{justify-content:center;gap:clamp(12px,1.5vw,24px);display:flex}.primary-nav a{color:#53605d;padding:25px 0 23px;font-size:11px;text-decoration:none;position:relative}.primary-nav a[aria-current=page]{color:var(--ink);font-weight:700}.primary-nav a[aria-current=page]:after{background:var(--vermilion);content:"";height:2px;position:absolute;bottom:-1px;left:0;right:0}.header-tools,.language-switch,.mode-switch{align-items:center;display:flex}.header-tools{gap:8px}.language-switch{border:1px solid var(--line);background:var(--white);gap:4px;height:34px;padding:0 10px}.language-switch button{color:var(--faint);cursor:pointer;background:0 0;border:0;padding:0;font-size:11px}.language-switch button[aria-pressed=true]{color:var(--ink);font-weight:800}.language-switch span{color:var(--line-strong);font-size:10px}.mode-switch{border:1px solid var(--line);background:var(--white);height:34px}.mode-switch button{height:100%;color:var(--muted);cursor:pointer;background:0 0;border:0;padding:0 10px;font-size:11px}.mode-switch button[aria-pressed=true]{background:var(--forest);color:var(--white)}.icon-button{border:1px solid var(--line);background:var(--white);width:34px;height:34px;color:var(--ink);cursor:pointer;border-radius:0;place-items:center;display:grid}.icon-button svg{stroke-width:1.8px;width:15px;height:15px}.icon-button.is-active{border-color:var(--vermilion);color:var(--vermilion)}@media (width<=1120px){.app-header{grid-template-rows:58px 42px;grid-template-columns:1fr auto;padding:0 18px}.primary-nav{border-top:1px solid var(--line);scrollbar-width:none;grid-area:2/1/auto/-1;justify-content:flex-start;gap:24px;overflow-x:auto}.app-header--cover .primary-nav{border-top-color:#b7e5d329}.primary-nav::-webkit-scrollbar{display:none}.primary-nav a{flex:none;padding:13px 0 12px}}@media (width<=720px){.app-header{gap:10px;min-height:58px;padding:0 14px}.brand-name,.mode-switch{display:none}}.contribution-footer{border-top:1px solid var(--line);background:var(--forest);color:var(--white);grid-template-columns:minmax(0,1fr) auto;align-items:end;gap:36px;padding:52px max(6vw,32px);display:grid}.contribution-footer h2{font:400 clamp(26px, 3vw, 38px)/1.1 var(--font-display);margin:0}.contribution-footer p{color:#b9d2c9;max-width:620px;margin:12px 0 0;font-size:14px;line-height:1.7}.contribution-footer a{color:#eaf8f1;white-space:nowrap;border:1px solid #8fc8b5;align-items:center;gap:9px;min-height:40px;padding:0 14px;font-size:13px;font-weight:700;text-decoration:none;display:inline-flex}.contribution-footer a:hover{color:#0a2921;background:#d7eee4}.contribution-footer svg{width:15px;height:15px}@media (width<=720px){.contribution-footer{grid-template-columns:1fr;align-items:start;gap:22px;padding:40px 20px}.contribution-footer a{width:fit-content}}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--paper:#f7f8f5;--white:#fff;--ink:#16201f;--muted:#65716e;--faint:#8a9491;--line:#d3dbd7;--line-strong:#aebbb6;--forest:#123f39;--forest-2:#1d5e55;--vermilion:#b64c33;--violet:#6f48a5;--blue:#2f6da2;--yellow:#e7b84a;--success:#2c765d;--warning:#9a6724;--danger:#a33e34;--radius:4px;--max-width:1480px;--header-height:64px;--font-display:Georgia, "Times New Roman", serif;--font-sans:Inter, "Segoe UI", "Microsoft YaHei", sans-serif;--shadow-float:0 18px 45px #14221f1a}@media (width<=1120px){:root{--header-height:100px}}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--white);min-width:320px;min-height:100vh;color:var(--ink);font-family:var(--font-sans);letter-spacing:0;text-rendering:optimizelegibility;margin:0}button,input,textarea,select{font:inherit;letter-spacing:0}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,[contenteditable=true]:focus-visible{outline:2px solid var(--vermilion);outline-offset:3px}a{color:inherit}.app-shell{min-height:100vh;overflow:clip}.single-page-domain{scroll-margin-top:var(--header-height)}.deep-content-loading{border-top:1px solid var(--line);min-height:220px;color:var(--muted);place-items:center;font-size:14px;display:grid}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}