:root{
  --bg:#f5f7f8; --surface:#fff; --surface-2:#f0f3f5; --text:#14202b; --muted:#5a6b7a; --line:#dde3e8;
  --brand:#0e7490; --brand-strong:#155e75; --brand-soft:#e0f2f7; --on-brand:#fff;
  --ok:#15803d; --ok-soft:#dcfce7; --warn:#b45309; --warn-soft:#fef3c7; --bad:#b91c1c; --bad-soft:#fee2e2;
  --on-bad:#fff; --info:#1d4ed8; --info-soft:#dbeafe; --neutral-soft:#e7ebee;
  --radius:14px; --radius-sm:10px; --shadow:0 1px 2px rgba(15,32,43,.06),0 4px 16px rgba(15,32,43,.06);
  --font:system-ui,-apple-system,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e1418; --surface:#161e24; --surface-2:#1d272e; --text:#e8eef2; --muted:#93a4b2; --line:#2a3640;
  --brand:#38b6d4; --brand-strong:#67cbe3; --brand-soft:#12323c; --on-brand:#06222b;
  --ok:#4ade80; --ok-soft:#12301e; --warn:#fbbf24; --warn-soft:#33270b; --bad:#f87171; --bad-soft:#3a1717;
  --on-bad:#2a0a0a; --info:#7aa7ff; --info-soft:#14233f; --neutral-soft:#25313a; --shadow:none;}}
*{box-sizing:border-box} html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 var(--font);-webkit-font-smoothing:antialiased}
h1,h2,h3{line-height:1.2;margin:0 0 .5rem;letter-spacing:-.01em} h1{font-size:1.75rem;font-weight:750} h2{font-size:1.15rem;font-weight:700} h3{font-size:1rem}
p{margin:.4rem 0} a{color:var(--brand);text-underline-offset:2px} small,.muted{color:var(--muted)}
:focus-visible{outline:3px solid color-mix(in srgb,var(--brand) 55%,transparent);outline-offset:2px;border-radius:8px}
.wrap{max-width:720px;margin:0 auto;padding:16px 16px 120px}
.wrap.wide{max-width:1040px}

.topbar{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.topbar .in{max-width:1040px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;text-decoration:none;color:var(--text);letter-spacing:-.01em}
.brand .mark{width:34px;height:34px;border-radius:10px;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font-weight:800}
.brand small{display:block;font-weight:500;font-size:.72rem;color:var(--muted);line-height:1}
.spacer{flex:1}

.btn,button{font:inherit;font-weight:650;border:1px solid transparent;border-radius:12px;min-height:46px;padding:10px 18px;cursor:pointer;background:var(--brand);color:var(--on-brand);display:inline-flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;transition:transform .06s ease,background .15s ease;width:auto}
.btn:hover,button:hover{background:var(--brand-strong)} .btn:active,button:active{transform:scale(.98)}
.btn.block,form>button:only-child,.card>form>button{width:100%}
button.secondary,.btn.secondary{background:var(--surface);color:var(--text);border-color:var(--line)} button.secondary:hover,.btn.secondary:hover{background:var(--surface-2)}
button.danger,.btn.danger{background:var(--bad);color:var(--on-bad)}
button[disabled]{opacity:.55;cursor:not-allowed}
.btn.sm,button.sm{min-height:44px;padding:6px 12px;font-size:.92rem}

.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:14px 0;box-shadow:var(--shadow)}
.card>h2:first-child{margin-bottom:.75rem}
.stack>*+*{margin-top:12px} .row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row>*{flex:1 1 150px;min-width:0}
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:3px 10px;font-size:.8rem;font-weight:650;background:var(--neutral-soft);color:var(--text)}
.badge.ok{background:var(--ok-soft);color:var(--ok)} .badge.warn{background:var(--warn-soft);color:var(--warn)} .badge.bad{background:var(--bad-soft);color:var(--bad)} .badge.info{background:var(--info-soft);color:var(--info)} .badge.brand{background:var(--brand-soft);color:var(--brand-strong)}
.list{list-style:none;margin:0;padding:0} .list>li,.list>a{display:flex;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--line);color:inherit;text-decoration:none}
.list>li:first-child,.list>a:first-child{border-top:0} .list .grow{flex:1;min-width:0} .list .grow strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.list>a::after{content:"›";color:var(--muted);font-size:1.4rem}
.tiles{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}.tile{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px;text-decoration:none;color:inherit}
.tile b{display:block;font-size:1.8rem;line-height:1.1;letter-spacing:-.02em}.tile span{color:var(--muted);font-size:.88rem}.tile.alert b{color:var(--bad)}
@media(min-width:720px){.tiles{grid-template-columns:repeat(4,1fr)}}

label{display:block;font-weight:650;font-size:.92rem;margin:12px 0 6px}
input,select,textarea{font:inherit;width:100%;min-height:46px;padding:10px 12px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);appearance:none;-webkit-appearance:none}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%2393a4b2' stroke-width='2'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
input:focus,select:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 25%,transparent)}
input[type=checkbox],input[type=radio]{width:20px;min-height:20px;padding:0;accent-color:var(--brand)}
textarea{min-height:90px;resize:vertical}
.help{color:var(--muted);font-size:.85rem;margin-top:4px} .errorlist{list-style:none;margin:6px 0 0;padding:0;color:var(--bad);font-size:.88rem}
.err{color:var(--bad)} .ok{color:var(--ok)}
.msg{border-radius:12px;padding:12px 14px;margin:12px 0;background:var(--info-soft);color:var(--info);font-weight:550}
.msg.error{background:var(--bad-soft);color:var(--bad)} .msg.success{background:var(--ok-soft);color:var(--ok)}
.nonfield{background:var(--bad-soft);color:var(--bad);border-radius:12px;padding:12px 14px;margin:12px 0}.nonfield ul{margin:0;padding:0;list-style:none}

.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.95rem} th{color:var(--muted);font-weight:650;font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;text-align:left}
th,td{padding:10px 8px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top} tr:last-child td{border-bottom:0}

.hero{padding:22px 4px 6px}.hero p{color:var(--muted);font-size:1.02rem;max-width:42ch}
.points{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 4px;padding:0;list-style:none}.points li{background:var(--brand-soft);color:var(--brand-strong);border-radius:999px;padding:6px 12px;font-size:.86rem;font-weight:600}
.step{display:flex;align-items:center;gap:10px;margin-bottom:4px}.step .n{width:28px;height:28px;border-radius:50%;background:var(--brand);color:var(--on-brand);display:grid;place-items:center;font-weight:750;font-size:.9rem;flex:none}
.cards-radio{display:grid;gap:10px}.vehicle{position:relative;display:flex;gap:12px;align-items:center;border:1.5px solid var(--line);border-radius:var(--radius);padding:14px;cursor:pointer;background:var(--surface);margin:0;font-weight:500}
.vehicle input{position:absolute;opacity:0;inset:0;width:100%;height:100%;cursor:pointer}
.vehicle:has(input:checked){border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 22%,transparent);background:var(--brand-soft)}
.vehicle .ico{width:44px;height:44px;border-radius:12px;background:var(--surface-2);display:grid;place-items:center;font-size:1.5rem;flex:none}
.vehicle .pic{width:84px;height:auto;aspect-ratio:4/3;object-fit:cover;border-radius:12px;background:var(--surface-2);flex:none}
.vehicle .name{font-weight:700}.vehicle .price{margin-left:auto;text-align:right;font-weight:700;white-space:nowrap}.vehicle .price small{display:block;font-weight:500}
.stepper{display:inline-flex;align-items:center;border:1.5px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.stepper button{border-radius:0;min-width:46px;background:transparent;color:var(--text);border:0}.stepper input{width:56px;text-align:center;border:0;border-radius:0;box-shadow:none}
.summary-bar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--surface);border-top:1px solid var(--line);box-shadow:0 -8px 24px rgba(15,32,43,.08);padding:10px 16px calc(10px + env(safe-area-inset-bottom))}
.summary-bar .in{max-width:720px;margin:0 auto;display:flex;align-items:center;gap:14px}.summary-bar .total{flex:1}.summary-bar .total>b{font-size:1.25rem;display:block;line-height:1.1}.summary-bar .total small{display:block}
details.terms{border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 14px;background:var(--surface-2)}details.terms summary{cursor:pointer;font-weight:650}

.timeline{display:flex;gap:4px;margin:14px 0 6px;padding:0;list-style:none}.timeline li{flex:1;min-width:0;text-align:center;font-size:.8rem;line-height:1.25;color:var(--muted);overflow-wrap:anywhere}
.timeline li::before{content:"";display:block;height:6px;border-radius:3px;background:var(--line);margin-bottom:6px}.timeline li.done::before{background:var(--brand)}.timeline li.now{color:var(--text);font-weight:700}.timeline li.now::before{background:var(--brand)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 0}.kv dt{color:var(--muted);padding-right:14px}.kv dd{margin:0;text-align:right;font-weight:600}.kv .sum{border-top:1px solid var(--line);padding-top:8px;margin-top:4px;font-size:1.05rem}

.shell{display:block}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;background:var(--surface);border-top:1px solid var(--line);display:flex;padding-bottom:env(safe-area-inset-bottom)}
.tabbar a,.tabbar summary{flex:1;text-align:center;padding:8px 2px 6px;font-size:.72rem;font-weight:650;color:var(--muted);text-decoration:none;list-style:none;cursor:pointer}.tabbar a.active{color:var(--brand)}
.tabbar .ic{display:block;font-size:1.35rem;line-height:1.2}.tabbar summary::-webkit-details-marker{display:none}
.more{position:relative;flex:1}.more[open] .sheet{display:block}.sheet{display:none;position:fixed;left:8px;right:8px;bottom:64px;max-height:70vh;overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 40px rgba(0,0,0,.25);padding:6px 0}
.sheet a{display:block;padding:10px 18px;color:var(--text);font-size:1rem;text-align:left;font-weight:550}.sheet h4{margin:8px 18px 2px;font-size:.72rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}.sheet form{padding:6px 12px}
.shadowbar{background:var(--warn-soft);color:var(--warn);text-align:center;padding:6px 12px;font-size:.85rem;font-weight:650}
.searchbox{max-width:300px;flex:1}.searchbox input{min-height:44px;padding:6px 12px;border-radius:999px}
@media(min-width:900px){
  .shell{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 56px)}
  .tabbar{position:sticky;top:56px;height:calc(100vh - 56px);flex-direction:column;align-content:flex-start;border-top:0;border-right:1px solid var(--line);padding:12px 8px;overflow:auto}
  .tabbar a,.tabbar summary{flex:none;text-align:left;padding:10px 12px;font-size:.95rem;border-radius:10px}.tabbar a:hover{background:var(--surface-2)}.tabbar a.active{background:var(--brand-soft)}
  .tabbar{gap:2px}.tabbar .ic{display:inline-block;width:1.6em;margin-right:6px;font-size:1.05rem;text-align:center}.more{display:contents}.more>summary{display:none}.sheet{display:block;position:static;border:0;box-shadow:none;padding:0;max-height:none}
  .wrap{padding-bottom:40px}
}
@media print{.topbar,.tabbar,.summary-bar,button,.btn{display:none!important}body{background:#fff;color:#000}.card{box-shadow:none}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.summary-bar details{margin-top:2px}.summary-bar summary{font-size:.8rem;color:var(--brand);cursor:pointer;list-style:none}.summary-bar summary::-webkit-details-marker{display:none}
.items{display:grid;grid-template-columns:1fr auto;gap:2px 14px;font-size:.82rem;color:var(--muted);margin:6px 0 2px;max-height:30vh;overflow:auto}.items .amt{font-weight:650;color:var(--text);white-space:nowrap;text-align:right}
.nextbar{position:sticky;top:56px;z-index:15;display:flex;flex-wrap:wrap;gap:10px;align-items:center;background:var(--brand-soft);border:1px solid var(--brand);border-radius:var(--radius);padding:10px 14px;margin:10px 0}
.nextbar form{display:flex;gap:8px;align-items:center;margin:0}.nextbar button,.nextbar .btn,.nextbar select{width:auto;margin:0}
details.extra{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:0 16px;margin:14px 0}
details.extra>summary{cursor:pointer;padding:12px 0;font-weight:650}
details.extra[open]>summary{border-bottom:1px solid var(--line);margin-bottom:12px}

.check{display:flex;gap:10px;align-items:center;font-weight:500}.thumb{width:64px;height:48px;object-fit:cover;border-radius:8px;background:var(--surface-2)}