:root{--b:#3b5bdb;--b2:#2f4ac0;--ink:#1b1f3b;--mut:#5c6380;--bg:#f7f8fc;--card:#fff;--line:#e3e6f0;--y:#ffd43b;--ok:#2b8a3e;--r:16px;--sh:0 1px 2px rgba(27,31,59,.06),0 6px 24px rgba(27,31,59,.07)}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang HK","Microsoft JhengHei","Noto Sans CJK HK",sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--b2);text-underline-offset:2px}a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--y);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px 12px;z-index:9}
.wrap,main{max-width:1080px;margin:0 auto;padding:0 16px}
.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.top .wrap{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:10px 16px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink);font-weight:800;font-size:1.2rem;letter-spacing:-.02em}.logo b{color:var(--b)}
.nav{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;flex:1 1 100%;margin:0 -6px;white-space:nowrap}.nav::-webkit-scrollbar{display:none}
.nav a{padding:6px 10px;border-radius:999px;text-decoration:none;color:var(--mut);font-size:.92rem;font-weight:500}.nav a:hover,.nav a[aria-current]{background:#edf0ff;color:var(--b2)}
@media(min-width:900px){.nav{flex:1;justify-content:flex-end;margin:0}}
main{padding-top:18px;padding-bottom:40px}
h1{font-size:clamp(1.7rem,4.5vw,2.6rem);line-height:1.15;letter-spacing:-.025em;margin:.2em 0 .3em}
h2{font-size:1.35rem;letter-spacing:-.01em;margin:1.8em 0 .5em}h3{font-size:1.05rem;margin:1.4em 0 .3em}
.note{font-size:.88rem;color:var(--mut)}nav.note{margin-bottom:6px}nav.note a{color:var(--mut)}
.lead{font-size:1.1rem;color:var(--mut);margin:0 0 8px}
.phead{display:grid;gap:16px;align-items:center;margin:4px 0 18px}
.phead .illus{width:100%;max-width:240px;height:auto;border-radius:var(--r);display:block}
@media(min-width:760px){.phead{grid-template-columns:1fr 240px}}
.hero{background:linear-gradient(135deg,#3b5bdb 0%,#5f3dc4 60%,#7048e8 100%);color:#fff;border-radius:24px;padding:28px 22px;margin:6px 0 24px;display:grid;gap:18px;position:relative;overflow:hidden}
.hero h1{color:#fff}.hero p{color:#dfe4ff;font-size:1.1rem;margin:0}.hero .illus{display:none}
.hero:after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,212,59,.25)}
.hero .cta{display:inline-block;margin-top:14px;background:var(--y);color:var(--ink);font-weight:700;padding:11px 18px;border-radius:12px;text-decoration:none}
@media(min-width:760px){.hero{grid-template-columns:1.3fr 1fr;padding:44px}.hero .illus{display:block;width:100%;border-radius:18px;background:#fff}}
.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));margin:14px 0 8px;padding:0;list-style:none}
.tile{display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--ink);box-shadow:var(--sh);transition:transform .15s}
.tile:hover{transform:translateY(-2px);color:var(--ink)}.tile b{display:block}.tile span{font-size:.88rem;color:var(--mut)}
.tile .badge{color:#fff}.badge{flex:none;width:42px;height:42px;border-radius:12px;display:grid;place-items:center;color:#fff}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--sh);margin:8px 0 20px}
.calc .row{display:flex;gap:8px;flex-wrap:wrap;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:8px;margin:0 0 8px}
.calc .row>*{flex:1 1 110px;min-width:0}
input,select{font:inherit;width:100%;padding:10px 12px;border:1.5px solid #cfd4e4;border-radius:10px;background:#fff;color:var(--ink);min-height:44px}
input:focus,select:focus{border-color:var(--b);outline:3px solid #c5d0ff;outline-offset:0}
label{display:block;font-weight:600;font-size:.92rem;margin:6px 0}label input,label select{margin-top:4px;font-weight:400}
button{font:inherit;font-weight:700;background:var(--b);color:#fff;border:0;border-radius:12px;padding:12px 20px;min-height:46px;cursor:pointer;margin:6px 6px 6px 0}
button:hover{background:var(--b2)}button[onclick^="add"]{background:#edf0ff;color:var(--b2)}
.out{margin:14px 0 0;padding:18px;border-radius:16px;background:linear-gradient(135deg,#edf0ff,#f3eeff);font-size:1.25rem;font-weight:800;line-height:1.35;color:var(--ink)}
.bar{height:12px;background:#dfe3f5;border-radius:99px;margin-top:12px;overflow:hidden}.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#3b5bdb,#7048e8);border-radius:99px;transition:width .5s}
.prose{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:6px 20px 20px;box-shadow:var(--sh)}
.prose>h2:first-child{margin-top:.8em}
.feature{display:block;width:100%;height:auto;border-radius:20px;margin:6px 0 16px}
table{border-collapse:collapse;width:100%;margin:10px 0;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:.95rem}td{overflow-wrap:anywhere}th[scope=row]{width:32%;min-width:6.5em}
th,td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#f2f4fb;font-weight:700}
tr:last-child td,tr:last-child th{border-bottom:0}
ul.sl{list-style:none;padding:0;display:grid;gap:8px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
ul.sl li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}ul.sl li a{font-weight:600;text-decoration:none}ul.sl .note{display:block}
.foot{background:#1b1f3b;color:#c9cde3;margin-top:30px;padding:26px 0;font-size:.9rem}.foot .logo{color:#fff}.foot a{color:#fff}