/* 版面：Block 式大標＋單一按鈕的首屏，下面照 Nu Flow 的說明順序（症狀→原理→為什麼→流程）；顏色為草稿，識別規範定稿後換 */
:root{--bg:#F6F3EC;--fg:#16212B;--mute:#5C6773;--card:#FFFFFF;--line:#DDD6C8;--navy:#16384F;--navy-fg:#F6F3EC;--clay:#9A4A25;--clay-text:#9A4A25;--clay-fg:#FFFFFF;--sand:#EDE5D5;
--sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;--serif:"Noto Serif TC","Songti TC",serif}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0F161D;--fg:#ECE8DE;--mute:#9AA5B0;--card:#17212B;--line:#2A3642;--sand:#18232D;--navy:#0B2536;--clay-text:#E79A72;color-scheme:dark}}
:root[data-theme="dark"]{--clay-text:#E79A72;--bg:#0F161D;--fg:#ECE8DE;--mute:#9AA5B0;--card:#17212B;--line:#2A3642;--sand:#18232D;--navy:#0B2536;color-scheme:dark}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--fg);font-family:var(--sans);font-size:17px;line-height:1.75}
.in{max-width:760px;margin:0 auto;padding-inline:20px}
section{padding-block:44px}
h1,h2,h3,p{margin:0}
h1{font-weight:900;font-size:clamp(38px,11vw,64px);line-height:1.12;letter-spacing:-.01em;text-wrap:balance}
h2{font-weight:900;font-size:clamp(26px,7vw,36px);line-height:1.25;text-wrap:balance}
h3{font-size:19px;font-weight:700}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--clay-text);margin-bottom:10px}
.mute{color:var(--mute)}
.btn{display:inline-block;font:inherit;font-weight:700;font-size:17px;border:0;border-radius:6px;padding:14px 22px;background:var(--clay);color:var(--clay-fg);text-decoration:none;cursor:pointer}
.btn.line{background:transparent;color:inherit;border:2px solid currentColor}
.btn:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--clay-text);outline-offset:2px}
.nav{display:flex;justify-content:space-between;align-items:center;padding-block:16px}
.nav b{font-weight:900;letter-spacing:.06em;font-size:20px}
.hero{background:var(--navy);color:var(--navy-fg);padding-block:0 52px}
.hero .photo{margin-inline:-20px;height:240px;background:linear-gradient(160deg,#274c66,#16384F 60%,#0e2a3d);display:grid;place-items:center;font-size:13px;color:#9db4c4;margin-top:8px}
.hero h1{margin-top:28px}
.hero p.lead{margin-top:16px;font-size:18px;opacity:.9;max-width:34em}
.row{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.chips span{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:8px 16px;font-size:16px}
.band{background:var(--sand)}
.cols{display:grid;gap:14px;margin-top:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:20px;display:grid;gap:6px;min-width:0}
.card .k{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--clay-text)}
.diagram{margin-top:24px;background:var(--navy);border-radius:8px;padding:18px;color:var(--navy-fg)}
.diagram svg{width:100%;height:auto;display:block}
.diagram p{font-size:14px;margin-top:10px;opacity:.85}
ol.steps{list-style:none;margin:24px 0 0;padding:0;display:grid;gap:12px}
ol.steps li{display:grid;grid-template-columns:44px 1fr;gap:14px;align-items:start;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:16px}
ol.steps .n{font-weight:900;font-size:28px;color:var(--clay-text);line-height:1.1}
.ph{color:var(--fg);background:var(--sand);border-radius:8px;display:grid;place-items:center;font-size:13px;text-align:center;padding:10px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
.note{font-size:14px;color:var(--mute);margin-top:12px}
form{display:grid;gap:14px;margin-top:22px}
label{display:grid;gap:6px;font-weight:700;font-size:15px}
input,select,textarea{font:inherit;font-weight:400;padding:12px;border:1px solid var(--line);border-radius:6px;background:var(--card);color:var(--fg);min-width:0;width:100%}
#msg{font-weight:700;color:var(--clay-text)}
footer{padding-block:32px;font-size:14px;color:var(--mute);border-top:1px solid var(--line)}
@media (min-width:640px){.cols.three{grid-template-columns:repeat(3,1fr)}.hero .photo{margin-inline:0;border-radius:8px;height:300px}}
.nav a{color:inherit;text-decoration:none;font-size:15px;font-weight:700;margin-left:16px}
.nav .links{display:flex;gap:2px;flex-wrap:wrap;justify-content:flex-end}
details{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:14px 16px;margin-top:10px}
summary{font-weight:700;cursor:pointer}details p{margin-top:8px;color:var(--mute)}
.pagehead{background:var(--navy);color:var(--navy-fg);padding-block:0 40px}
.pagehead h1{font-size:clamp(32px,9vw,48px);margin-top:20px}
.pagehead .lead{margin-top:14px;font-size:18px;opacity:.9}
.skip{position:absolute;left:-999px;top:0;background:var(--clay);color:#fff;padding:10px 14px;z-index:9}.skip:focus{left:8px;top:8px}
input,select,textarea{border-color:#8A94A0}
a:focus-visible,summary:focus-visible{outline:3px solid var(--clay-text);outline-offset:2px}
footer a,.card a,.note a{color:var(--clay-text);text-decoration:underline}footer a:visited,.card a:visited,.note a:visited{color:var(--clay-text)}
/* 一頁式首頁與隱私權政策（S-166） */
html{scroll-behavior:smooth;scroll-padding-top:112px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{overflow-wrap:anywhere}
.topbar{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
.topbar .in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:2px 16px;padding-block:8px}
.topbar .brand{font-weight:900;letter-spacing:.06em;font-size:20px;color:var(--fg);text-decoration:none}
.topbar nav{display:flex;flex-wrap:wrap;gap:0 4px}
.topbar nav a{color:var(--fg);text-decoration:none;font-size:15px;font-weight:500;padding:8px 8px}
.topbar a:focus-visible{outline:3px solid var(--clay-text);outline-offset:2px}
.onepage .hero{padding-block:56px}
.onepage .hero h1{margin-top:8px}
.onepage .cols.three{grid-template-columns:1fr}
ul.plain{margin:14px 0;padding-left:1.2em;display:grid;gap:6px}
code{font-family:ui-monospace,Consolas,monospace;font-size:.92em;background:var(--sand);padding:1px 6px;border-radius:4px}
.qr{margin-top:20px;max-width:100%;height:auto;border-radius:6px}
.doc{padding-block:36px 56px}
.doc h1{font-size:clamp(30px,8vw,44px)}
.doc h2{font-size:clamp(20px,5vw,24px);margin-top:36px;margin-bottom:10px}
.doc a,#backup a,#contact .card a,footer a{color:var(--clay-text);text-decoration:underline}
.onepage .two{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
#contact .card{margin-top:16px}
#contact .row{margin-top:20px}
@media (min-width:640px){.onepage .cols.three{grid-template-columns:1fr 1fr}.topbar nav a{font-size:16px;padding:8px 12px}}
@media (min-width:1000px){.onepage .cols.three{grid-template-columns:repeat(4,1fr)}.in{max-width:960px}.doc.in,.doc{max-width:760px}}
.hero .eyebrow{color:#E7B08F}.hero a:focus-visible{outline-color:#F6F3EC}
body.onepage .hero{background:var(--navy);color:var(--navy-fg)}