:root{
  --ink:#0C3527; --ink2:#144733; --teal:#1B9A6B; --teal-dark:#147A54;
  --amber:#C9A227; --paper:#F6F7F2; --card:#FFFFFF; --line:#D8DED2;
  --mut:#5B6E63; --bad:#C0392B; --ok:#177245;
  --shadow:0 1px 4px rgba(12,53,39,.06),0 8px 24px rgba(12,53,39,.05);
  --serif:"Noto Serif CJK TC","Songti TC","PMingLiU",serif;
  --sans:"Noto Sans CJK TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html,body{overflow-x:clip}
body{font-family:var(--sans);background:var(--paper);color:var(--ink);line-height:1.75;font-size:16px;-webkit-tap-highlight-color:transparent}
::selection{background:#F3E3AC}
img{max-width:100%}
a{color:var(--teal-dark)}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}

/* ===== 頁首：桌機單列；手機兩列（品牌＋動作列／導覽橫捲列），元素不擠壓、不截斷 ===== */
header.site{position:sticky;top:0;z-index:50;background:rgba(246,247,242,.97);border-bottom:1px solid var(--line);box-shadow:0 6px 18px rgba(12,53,39,.05)}
.hbar{display:flex;align-items:center;gap:16px;padding:10px 0;flex-wrap:wrap}
.hbar .brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex:0 0 auto}
.hbar .brand img{width:40px;height:40px}
.hbar .brand b{font-family:var(--serif);font-size:20px;letter-spacing:.04em;white-space:nowrap}
nav.main{display:flex;gap:22px;align-items:center;margin-left:auto}
nav.main a{color:var(--ink);text-decoration:none;font-size:15px;white-space:nowrap;padding:4px 0}
nav.main a:hover{color:var(--teal-dark)}
.hactions{display:flex;gap:14px;align-items:center;flex:0 0 auto}
.hactions a{color:var(--ink);text-decoration:none;font-size:15px;white-space:nowrap}
.hactions a:hover{color:var(--teal-dark)}
.hactions a.nav-cta{background:var(--teal);color:#fff;border-radius:10px;padding:8px 16px;font-weight:700}
.hactions a.nav-cta:hover{background:var(--teal-dark);color:#fff}
nav.main a.nav-cta{background:var(--teal);color:#fff;border-radius:10px;padding:7px 14px;font-weight:700}

.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:11px 22px;min-height:48px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;font-size:16px;font-family:var(--sans);background:#fff;color:var(--ink);transition:background .15s ease,border-color .15s ease}
.btn:active{transform:scale(.99)}
.btn-teal{background:var(--teal);color:#fff}
.btn-teal:hover{background:var(--teal-dark)}
.btn-ghost{border-color:var(--paper);color:var(--paper);background:transparent}
.btn-amber{background:var(--amber);color:var(--ink)}
.btn-line{border-color:var(--ink);color:var(--ink);background:transparent}
.btn:disabled{opacity:.38;cursor:not-allowed}

/* ===== 首頁主視覺 ===== */
.hero{background:linear-gradient(155deg,#0E3B2C 0%,var(--ink) 55%,#092A1F 100%);color:var(--paper);padding:60px 0 68px;position:relative}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:8px;background:var(--amber)}
.hero .eyebrow{color:var(--amber);font-weight:700;letter-spacing:.18em;font-size:13px}
.hero h1{font-family:var(--serif);font-size:44px;line-height:1.32;letter-spacing:.01em;margin:14px 0 16px}
.hero p.lead{font-size:18px;line-height:1.85;color:#CFE3D6;max-width:34em}
.hero .cta{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.hero .note{margin-top:16px;font-size:13px;color:#9DBFA9}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:40px}
.stat{border:1px solid #26503F;border-radius:14px;padding:18px;background:var(--ink2)}
.stat b{display:block;font-size:30px;font-family:var(--serif);color:#fff;line-height:1.25}
.stat span{font-size:13px;color:#B9D2C2}

/* ===== 區塊與卡片 ===== */
section{padding:56px 0}
h2.sec{font-family:var(--serif);font-size:30px;letter-spacing:.02em;margin-bottom:8px}
h2.sec::after{content:"";display:block;width:36px;height:4px;border-radius:2px;background:var(--amber);margin-top:10px}
p.sec-lead{color:var(--mut);max-width:40em;margin-bottom:28px}
.grid{display:grid;gap:16px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow)}
.card h3{font-size:18px;margin-bottom:6px}
.card p{color:var(--mut);font-size:15px}
.fact b{display:block;font-family:var(--serif);font-size:24px;color:var(--teal-dark);margin-bottom:4px}
.subj{border-top:6px solid var(--teal);transition:transform .15s ease,box-shadow .15s ease}
.subj:hover{transform:translateY(-2px)}
.subj .no{font-size:12px;letter-spacing:.2em;color:var(--mut);font-weight:700}
.subj ul{margin:10px 0 0 18px;color:var(--mut);font-size:14px}
.small{font-size:13px;color:var(--mut)}
.msg{border-radius:12px;padding:13px 18px;margin-bottom:18px;font-size:15px}
.msg.ok{background:#E5F2E9;border:1px solid #9CC5A8}
.msg.err{background:#FBEAE8;border:1px solid #E3A49D}

/* ===== 表單 ===== */
form.auth{max-width:460px;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:var(--shadow)}
label.f{display:block;margin-bottom:14px;font-weight:700;font-size:15px}
input[type=text],input[type=email],input[type=password],input[type=date],select,textarea{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;font-size:16px;font-family:var(--sans);background:#fff;color:var(--ink);margin-top:5px}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px rgba(201,162,39,.25)}
textarea{line-height:1.7;resize:vertical}

/* ===== 作答介面 ===== */
.exam-shell{background:var(--card);border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}
.exam-head{background:var(--ink);color:var(--paper);padding:18px 24px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.exam-head h3{font-family:var(--serif);font-size:22px}
.exam-head .timer{margin-left:auto;font-size:22px;font-weight:700;background:var(--ink2);border:1px solid #26503F;border-radius:10px;padding:4px 14px;font-variant-numeric:tabular-nums}
.exam-body{padding:26px 24px}
.qtag{display:inline-block;font-size:12px;font-weight:700;background:#E1F0E7;color:var(--teal-dark);border-radius:99px;padding:3px 11px;margin-bottom:10px}
.qtext{font-size:19px;font-weight:700;line-height:1.65;margin-bottom:18px}
.opts{display:grid;gap:10px}
.opt{display:flex;gap:12px;align-items:flex-start;text-align:left;width:100%;background:var(--paper);border:2px solid var(--line);border-radius:12px;padding:14px 16px;min-height:54px;font-size:16px;line-height:1.6;cursor:pointer;font-family:var(--sans);color:var(--ink)}
.opt:hover{border-color:var(--teal)}
.opt.sel{border-color:var(--teal);background:#E7F3EC}
.opt .k{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;margin-top:1px}
.opt.sel .k{background:var(--teal)}
.qnav{display:flex;align-items:center;gap:10px;margin-top:22px;flex-wrap:wrap}
.dots{display:flex;gap:6px;flex-wrap:wrap}
.dot{width:34px;height:34px;border-radius:9px;border:1px solid var(--line);background:#fff;cursor:pointer;font-size:13px;font-weight:700;color:var(--mut)}
.dot.done{background:var(--teal);border-color:var(--teal);color:#fff}
.dot.now{outline:2px solid var(--amber);outline-offset:1px}
.qnav .sp{flex:1}
.score-big{font-family:var(--serif);font-size:56px;line-height:1.1}
.bar-row{display:grid;grid-template-columns:9.5em 1fr 3.2em;gap:10px;align-items:center;margin:8px 0;font-size:14px}
.bar{height:12px;background:#E9EBDD;border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--teal)}
.bar i.low{background:var(--bad)}
.bar i.mid{background:var(--amber)}
.exp-item{border-top:1px solid var(--line);padding:16px 0}
.exp-item .ans{font-weight:700}
.exp-item .ans.right{color:var(--ok)}
.exp-item .ans.wrong{color:var(--bad)}
.exp-item p{color:var(--mut);font-size:15px;margin-top:4px}
.setup{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:end}

/* ===== 表格：外層橫捲＋右緣捲動陰影提示 ===== */
.tbl-scroll{overflow-x:auto;border-radius:14px;background:linear-gradient(to right,var(--card) 30%,rgba(255,255,255,0)) left/40px 100% no-repeat local,linear-gradient(to left,var(--card) 30%,rgba(255,255,255,0)) right/40px 100% no-repeat local,radial-gradient(farthest-side at 0 50%,rgba(12,53,39,.14),transparent) left/14px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,rgba(12,53,39,.14),transparent) right/14px 100% no-repeat scroll}
table.list{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden}
table.list th,table.list td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line);font-size:14px;vertical-align:top}
table.list th{background:var(--ink);color:var(--paper);font-size:13px;letter-spacing:.06em;white-space:nowrap}
table.list tbody tr:nth-child(even) td{background:#FAFBF7}

details.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 22px;box-shadow:var(--shadow)}
details.faq summary{font-weight:700;cursor:pointer;font-size:17px}
details.faq summary::marker{color:var(--teal)}
details.faq p{color:var(--mut);margin-top:8px;font-size:15px}

/* ===== 頁尾 ===== */
footer.site{background:var(--ink);color:#B9D2C2;padding:46px 0 54px;font-size:14px;line-height:1.8;margin-top:20px}
footer.site .flogo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
footer.site .flogo img{width:34px;height:34px}
footer.site b{color:#fff;font-family:var(--serif);font-size:18px}
footer.site a{color:#E8C98A}
footer.site .flinks{display:flex;gap:10px 20px;flex-wrap:wrap;margin-bottom:16px}
footer.site .flinks a{color:#EAF2EC;text-decoration:none;font-size:15px}
footer.site .flinks a:hover{color:#E8C98A}
.hidden{display:none!important}
.pill{display:inline-block;font-size:12px;font-weight:700;border-radius:99px;padding:3px 11px;background:#E9EBDD;color:var(--mut)}
.pill.ok{background:#E5F2E9;color:var(--ok)}
.pill.warn{background:#FBEBD9;color:#9A6206}

@media (max-width:860px){
  .g4,.g3{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .setup{grid-template-columns:1fr 1fr}
  /* 頁首改兩列：第一列品牌＋登入/註冊，第二列導覽單列橫捲 */
  .hbar{gap:8px 12px;padding:10px 0 0}
  .hbar .brand img{width:36px;height:36px}
  .hbar .brand b{font-size:18px}
  .hactions{margin-left:auto;gap:12px}
  .hactions a.nav-cta{padding:7px 13px}
  nav.main{order:3;flex-basis:100%;margin-left:0;gap:22px;overflow-x:auto;padding:9px 2px 11px;border-top:1px solid var(--line);scrollbar-width:none;background:linear-gradient(to right,rgba(246,247,242,.97) 30%,rgba(246,247,242,0)) left/28px 100% no-repeat local,linear-gradient(to left,rgba(246,247,242,.97) 30%,rgba(246,247,242,0)) right/28px 100% no-repeat local,radial-gradient(farthest-side at 0 50%,rgba(12,53,39,.16),transparent) left/10px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,rgba(12,53,39,.16),transparent) right/10px 100% no-repeat scroll}
  nav.main::-webkit-scrollbar{display:none}
  nav.main a{font-size:15px;padding:2px 0}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  .hero{padding:42px 0 50px}.hero h1{font-size:31px;line-height:1.38}.hero p.lead{font-size:16px}
  .hero .cta .btn{flex:1 1 150px}
  .g4,.g3,.g2{grid-template-columns:1fr}.setup{grid-template-columns:1fr}
  .stats{gap:10px}.stat{padding:15px 16px}.stat b{font-size:24px}
  section{padding:44px 0}h2.sec{font-size:25px}
  .card{padding:20px}
  form.auth{padding:22px 20px}
  .exam-head{padding:16px 18px}.exam-head h3{font-size:19px}
  .exam-head .timer{font-size:19px;padding:3px 11px}
  .exam-body{padding:20px 16px}.qtext{font-size:17px}
  .qnav .btn{padding:9px 14px;min-height:44px;font-size:15px}
  .qnav .dots{order:4;flex-basis:100%}
  .bar-row{grid-template-columns:7.5em 1fr 2.8em;font-size:13px}
  .score-big{font-size:46px}
  table.list th,table.list td{padding:9px 10px;font-size:13px}
  footer.site .flinks{gap:16px}
}