:root{--bg:#f3efe6;--surface:#fbf9f4;--surface-2:#e9e4d8;--line:#d3ccbd;--text:#15130f;--muted:#5d584e;--accent:#ffd21f;--accent-ink:#15130a;--accent-text:#7a5a00;--link:#15130f;--focus:#15130f;--btn-border:#15130f;--field:#fff;--placeholder:#8b8578;--danger:#b3261e;--ok:#1e6b3a;--radius:14px;--gutter:clamp(16px, 4vw, 32px);--measure:40rem;--font-sans:"Source Sans 3 Variable", system-ui, -apple-system, "Segoe UI", Roboto, "PingFang HK", "Noto Sans HK", "Noto Sans CJK TC", "Microsoft JhengHei", sans-serif;--font-serif:"Source Serif 4 Variable", "Chiron Sung HK Variable", ui-serif, Georgia, "Songti TC", "Noto Serif HK", "Noto Serif CJK TC", "PMingLiU", serif;--font-hand:"Newsreader Variable", "LXGW WenKai TC", var(--font-serif);--font-device:system-ui, -apple-system, "Segoe UI", Roboto, "PingFang HK", "Noto Sans HK", "Microsoft JhengHei", sans-serif;color-scheme:light}.dark{--bg:#0b0b0c;--surface:#151518;--surface-2:#1d1d21;--line:#2c2c32;--text:#f3efe6;--muted:#aaa69c;--accent-text:#ffd21f;--link:#ffd21f;--focus:#ffd21f;--btn-border:#ffd21f;color:var(--text);color-scheme:dark}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scrollbar-color:#c4bcab transparent}body{background:var(--bg);color:var(--text);font-family:var(--font-sans);flex-direction:column;min-height:100vh;margin:0;font-size:1.125rem;line-height:1.6;display:flex;overflow-x:hidden}:lang(zh-HK) body,html:lang(zh-HK) body{line-height:1.8}main{flex:1}h1,h2,h3{font-family:var(--font-serif);text-wrap:balance;margin:0 0 .6em;font-weight:600;line-height:1.2}h1{font-size:clamp(2rem,6vw,3.25rem)}h2{font-size:clamp(1.6rem,4.5vw,2.4rem)}h3{font-size:1.2rem}p{margin:0 0 1em}a{color:var(--link);text-decoration-color:var(--accent-text);text-underline-offset:.2em;text-decoration-thickness:1.5px}img{max-width:100%;height:auto;display:block}:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}.wrap{width:100%;max-width:68rem;padding-inline:var(--gutter);margin-inline:auto}.narrow{max-width:calc(var(--measure) + 2 * var(--gutter))}.section{padding-block:clamp(3rem,8vw,6rem)}.lede{color:var(--muted);max-width:var(--measure);font-size:1.15rem}.muted{color:var(--muted)}.small{font-size:.9rem}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;overflow:hidden;position:absolute!important}[hidden]{display:none!important}[id]{scroll-margin-top:84px}.skip{background:var(--accent);color:var(--accent-ink);z-index:100;border-radius:8px;padding:8px 14px;font-weight:600;position:absolute;top:-60px;left:8px}.skip:focus{top:8px}.btn{border:1.5px solid var(--btn-border);background:var(--accent);min-height:48px;color:var(--accent-ink);font:inherit;cursor:pointer;border-radius:999px;justify-content:center;align-items:center;gap:.5em;padding:.7em 1.4em;font-weight:700;text-decoration:none;transition:transform .15s,background .15s;display:inline-flex}.btn:hover{background:#ffe066}.btn:active{transform:translateY(1px)}.btn[disabled]{opacity:.55;cursor:not-allowed}.btn-ghost{color:var(--text);border-color:var(--muted);background:0 0}.btn-ghost:hover{background:var(--surface-2)}.btn-big{padding:.9em 1.8em;font-size:1.2rem}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(18px,4vw,32px)}.field{margin-bottom:1.25rem}.field label,.label{margin-bottom:.4rem;font-weight:600;display:block}.field .help{color:var(--muted);margin:.35rem 0 0;font-size:.875rem}input[type=text],input[type=date],textarea{width:100%;font:inherit;font-family:var(--font-device);color:var(--text);background:var(--field);border:1.5px solid var(--muted);border-radius:10px;min-height:48px;padding:.75em .9em}textarea{resize:vertical;min-height:8.5rem}input::placeholder,textarea::placeholder{color:var(--placeholder)}input:focus,textarea:focus{border-color:var(--text);outline:3px solid var(--accent)}.check,.field label.check{grid-template-columns:24px 1fr;align-items:start;gap:12px;font-size:.95rem;font-weight:400;display:grid}.check input{width:22px;height:22px;accent-color:var(--accent);margin-top:3px}.notice{border-left:3px solid var(--accent);background:var(--surface-2);border-radius:0 10px 10px 0;padding:14px 16px;font-size:.95rem}.error-text{color:var(--danger);font-weight:600}.ok-text{color:var(--ok);font-weight:600}.prose{max-width:var(--measure)}.prose h2{margin-top:2.2em;font-size:1.5rem}.prose h3{margin-top:1.8em}.prose ul,.prose ol{padding-left:1.3em}.prose li{margin-bottom:.4em}.prose img{border-radius:var(--radius);margin-block:1.5em}.prose blockquote{border-left:3px solid var(--accent);color:var(--muted);margin:1.5em 0;padding-left:1em}.page-head{padding-block:clamp(2.5rem,7vw,4.5rem) 1rem}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}