/* 台灣正久機械 全站樣式（首頁版型 A：穩重主視覺） */
:root{
  --navy:#1F3A5F; --navy-dark:#152A45; --steel:#5B6770; --line:#D5DAE0;
  --white:#FFFFFF; --gray:#F4F6F8; --orange:#E07A1F; --orange-dark:#C4660F; --orange-text:#A9540E; /* 小字用深橘，白底與淺灰底對比 ≥ 4.5:1 */
  --text:#1E2A36; --red:#C62828;
  --font:"Inter","Noto Sans TC",system-ui,-apple-system,"Microsoft JhengHei",sans-serif;
  --max:1200px; --gutter:20px; --radius:6px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--white);line-height:1.7;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy)}
h1,h2,h3,h4{color:var(--navy);line-height:1.3;margin:0 0 .5em}
h1{font-size:clamp(1.8rem,4.5vw,2.8rem);text-wrap:balance}
h2{font-size:clamp(1.4rem,3vw,2rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
.section{padding:64px 0}
.section.alt{background:var(--gray)}
.section-head{margin-bottom:32px}
.section-head p{color:var(--steel);max-width:680px}
.eyebrow{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--steel);font-weight:600;margin-bottom:.5em;display:block}
.num{font-family:"Inter",sans-serif;font-variant-numeric:tabular-nums}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px;top:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* 待提供：紅字標示，上線前需補齊 */
.tbd{color:var(--red);font-weight:700}
/* 對外版：缺漏資料顯示「請來電洽詢」 */
.ask{color:var(--navy);font-weight:600;text-decoration:underline;text-underline-offset:3px}

/* 頁首 */
.site-header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:20}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px;position:relative}
.brand{color:#fff;text-decoration:none;display:flex;align-items:center;gap:12px;line-height:1.25}
.brand-text{display:flex;flex-direction:column}
.brand strong{font-size:1.05rem;letter-spacing:.04em}
.brand small{font-size:.72rem;opacity:.75;letter-spacing:.03em}
.nav{display:flex;align-items:center;gap:2px}
.nav a{color:#fff;text-decoration:none;padding:8px 9px;border-radius:4px;font-size:.95rem}
.nav a:hover,.nav a:focus-visible{background:rgba(255,255,255,.12)}
.nav a[aria-current="page"]{background:rgba(255,255,255,.16)}
.nav .nav-quote{background:var(--orange);font-weight:700;font-size:1.1875rem;margin-left:8px;padding:6px 16px} /* 19px 粗體＝大字，白字橘底 3:1 合格 */
.nav .nav-quote:hover{background:var(--orange-dark)}
.nav .lang{border:1px solid rgba(255,255,255,.4);font-size:.8rem;padding:4px 10px;margin-left:8px}
.nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.5);color:#fff;border-radius:4px;padding:6px 12px;font:inherit;cursor:pointer}
/* 英文選單較長：1200px 以下收合 */
@media (max-width:1200px){
  html[lang="en"].js .nav-toggle{display:block}
  html[lang="en"].js .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--navy-dark);flex-direction:column;align-items:stretch;padding:8px var(--gutter) 16px}
  html[lang="en"].js .nav.open{display:flex}
  html[lang="en"] .nav .nav-quote,html[lang="en"] .nav .lang{margin:8px 0 0;text-align:center}
}
@media (max-width:1024px){
  .js .nav-toggle{display:block}
  .js .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--navy-dark);flex-direction:column;align-items:stretch;padding:8px var(--gutter) 16px}
  .js .nav.open{display:flex}
  .nav{flex-wrap:wrap;justify-content:flex-end}
  .nav .nav-quote,.nav .lang{margin:8px 0 0;text-align:center}
}

/* 按鈕 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 24px;border-radius:var(--radius);font-weight:700;text-decoration:none;border:2px solid transparent;font-size:1.1875rem;cursor:pointer;font-family:inherit;line-height:1.4}
.btn-quote{background:var(--orange);color:#fff}
.btn-quote:hover{background:var(--orange-dark)}
.btn-outline{border-color:currentColor;color:var(--navy);background:transparent}
.btn-outline.light{color:#fff}
.btn-outline:hover{background:rgba(31,58,95,.06)}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--orange);outline-offset:2px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}

/* 首頁主視覺 */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(21,42,69,.95) 0,rgba(21,42,69,.82) 50%,rgba(21,42,69,.45))}
.hero-text{position:relative;padding-top:96px;padding-bottom:104px}
.hero h1{color:#fff;max-width:14em}
.hero p{max-width:34em;font-size:1.1rem;opacity:.92}
.hero .eyebrow{color:#9FB3C8}

/* 核心數字 */
.facts{background:#fff;border-bottom:1px solid var(--line)}
.facts-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.facts-grid>div{padding:28px 20px;display:flex;flex-direction:column;gap:4px;border-left:1px solid var(--line)}
.facts-grid>div:first-child{border-left:0}
.facts-grid strong{font-size:1.7rem;color:var(--orange);line-height:1.2}
.facts-grid span{color:var(--steel);font-size:.9rem}
@media (max-width:768px){.facts-grid{grid-template-columns:1fr 1fr}.facts-grid>div:nth-child(3){border-left:0}.facts-grid>div{border-top:1px solid var(--line)}}

/* 內頁標題 */
.page-head{background:var(--navy);color:#fff;padding:48px 0 44px;position:relative;overflow:hidden}
.page-head.has-img::before{content:"";position:absolute;inset:0;background:var(--head-img) center/cover;opacity:.18}
.page-head .wrap{position:relative}
.page-head h1{color:#fff;margin-bottom:.3em}
.page-head p{max-width:40em;opacity:.9;margin:0}
.breadcrumb{font-size:.85rem;margin-bottom:12px}
.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:4px}
.breadcrumb li+li::before{content:"›";margin-right:4px;opacity:.6}
.breadcrumb a{color:#C9D3DE}

/* 格線、卡片 */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(min(100%,420px),1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(min(100%,280px),1fr))}
.grid-4{grid-template-columns:repeat(auto-fill,minmax(min(100%,240px),1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.card-body p{color:var(--steel);font-size:.95rem}
.card .spec{margin-top:auto;font-size:.9rem;color:var(--navy);font-weight:600;border-top:1px solid var(--line);padding-top:12px}
.card .spec .num{color:var(--orange-text)}
.card-img{aspect-ratio:4/3;background:var(--gray);display:flex;align-items:center;justify-content:center;padding:12px}
.card-img img{max-height:100%;width:auto;object-fit:contain}
.card-img.cover{padding:0}.card-img.cover img{width:100%;height:100%;object-fit:cover}
.more{font-weight:600;text-decoration:none;margin-top:12px;display:inline-block}
.more:hover{text-decoration:underline}

/* 圖片 */
.rounded{border-radius:var(--radius);width:100%}
.fig{margin:0}
.fig img{border-radius:var(--radius);width:100%;background:var(--gray)}
.fig.contain img{object-fit:contain;aspect-ratio:4/3;padding:12px;border:1px solid var(--line)}
.fig.cover img{object-fit:cover;aspect-ratio:4/3}
.fig figcaption{font-size:.9rem;color:var(--steel);margin-top:8px}
.ph{background:repeating-linear-gradient(45deg,#E4E8EC 0 12px,#DDE2E7 12px 24px);color:var(--steel);display:flex;align-items:center;justify-content:center;text-align:center;font-size:.9rem;padding:16px;border-radius:var(--radius);aspect-ratio:4/3}

/* 兩欄 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split.top{align-items:start}
.split>*,.grid>*{min-width:0}
.split.wide-left{grid-template-columns:3fr 2fr}
@media (max-width:768px){.split,.split.wide-left{grid-template-columns:1fr;gap:32px}}

/* 清單 */
.plain{list-style:none;padding:0;margin:0 0 1em;display:grid;gap:8px}
.plain b{color:var(--orange-text);margin-right:6px}
.check{list-style:none;padding:0;margin:0 0 1em}
.check li{padding:6px 0 6px 26px;position:relative;border-bottom:1px dashed var(--line)}
.check li::before{content:"";position:absolute;left:2px;top:14px;width:10px;height:6px;border-left:2px solid var(--navy);border-bottom:2px solid var(--navy);transform:rotate(-45deg)}
.features{counter-reset:f;list-style:none;padding:0;margin:0;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr))}
.features li{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px 18px 60px;position:relative}
.features li::before{counter-increment:f;content:counter(f,decimal-leading-zero);position:absolute;left:18px;top:16px;font-family:"Inter",sans-serif;font-weight:700;color:var(--orange-text);font-size:1.1rem}
.features strong{display:block;color:var(--navy)}

/* 規格表 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;-webkit-overflow-scrolling:touch}
.table-wrap:focus-visible{outline:3px solid var(--orange)}
table.spec{border-collapse:collapse;width:100%;font-size:.92rem;min-width:640px}
table.spec th,table.spec td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}
table.spec th[scope="row"],table.spec thead th:first-child{text-align:left;color:var(--navy);font-weight:600;background:var(--gray);position:sticky;left:0}
table.spec thead th{background:var(--navy);color:#fff;font-weight:600}
table.spec thead th:first-child{background:var(--navy-dark);color:#fff}
table.spec td small,table.spec th small{display:block;color:var(--steel);font-weight:400;font-size:.8rem}
table.spec tr:last-child>*{border-bottom:0}
table.spec.compact{min-width:0}
table.spec.compact td{text-align:left;white-space:normal}
.table-note{font-size:.85rem;color:var(--steel);margin-top:8px}
.summary-specs{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,210px),1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:0 0 24px}
.summary-specs div{background:#fff;padding:16px 18px}
.summary-specs dt{font-size:.85rem;color:var(--steel)}
.summary-specs dd{margin:0;font-weight:700;color:var(--navy);font-size:1.15rem}
.summary-specs dd small{display:block;font-weight:400;color:var(--steel);font-size:.82rem}
details.more-table{margin-top:16px}
details.more-table summary{cursor:pointer;font-weight:600;color:var(--navy);padding:8px 0}

/* 下載 */
.downloads{list-style:none;padding:0;margin:0;display:grid;gap:12px}
.downloads a{display:flex;align-items:center;gap:14px;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;background:#fff}
.downloads a:hover{border-color:var(--navy)}
.downloads .icon{flex:none}
.downloads small{display:block;color:var(--steel)}

/* 子導覽（產品頁內） */
.subnav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:68px;z-index:10}
.subnav ul{list-style:none;margin:0;padding:0;display:flex;gap:4px;overflow-x:auto}
.subnav a{display:block;padding:12px 14px;text-decoration:none;white-space:nowrap;font-size:.92rem;color:var(--steel)}
.subnav a:hover{color:var(--navy)}
@media (max-width:1024px){.subnav{position:static}}

/* 產品分區 */
.product-block{padding:48px 0;border-top:1px solid var(--line);scroll-margin-top:50px} /* 避開固定的頁內目錄 */
.product-block:first-of-type{border-top:0}
.gallery{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(100%,220px),1fr))}

/* 時間軸 */
.timeline{list-style:none;padding:0 0 0 28px;margin:0;position:relative}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}
.timeline li{position:relative;padding:0 0 24px}
.timeline li::before{content:"";position:absolute;left:-28px;top:6px;width:16px;height:16px;border-radius:50%;background:#fff;border:3px solid var(--navy)}
.timeline li.highlight::before{border-color:var(--orange);background:var(--orange)}
.timeline time{display:block;font-weight:700;color:var(--orange-text);font-family:"Inter",sans-serif}

/* 資料卡 */
.datalist{display:grid;grid-template-columns:max-content 1fr;gap:10px 24px;margin:0}
.datalist dt{color:var(--steel)}
.datalist dd{margin:0;font-weight:600;color:var(--navy)}

/* 認證 */
.certs{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,260px),1fr));gap:32px}
.certs figure{margin:0;display:flex;gap:16px;align-items:flex-start}
.certs img{width:96px;flex:none;border:1px solid var(--line);border-radius:4px;background:#fff}
.certs figcaption{font-size:.9rem;color:var(--steel)}
.certs strong{color:var(--navy);font-size:1rem}
.cert-large{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,300px),1fr));gap:32px}
.cert-large figure{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.cert-large img{border:1px solid var(--line);margin-bottom:16px}

/* 流程 */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(100%,180px),1fr));counter-reset:s}
.steps li{background:#fff;border:1px solid var(--line);border-top:4px solid var(--navy);border-radius:var(--radius);padding:16px}
.steps li::before{counter-increment:s;content:"STEP " counter(s);display:block;font-size:.75rem;letter-spacing:.1em;color:var(--orange-text);font-weight:700;margin-bottom:4px}
.steps strong{display:block;color:var(--navy)}
.steps span{font-size:.9rem;color:var(--steel)}

/* 表單 */
.form{display:grid;gap:18px}
.form .row{display:grid;gap:18px;grid-template-columns:1fr 1fr}
@media (max-width:640px){.form .row{grid-template-columns:1fr}}
.field label{display:block;font-weight:600;color:var(--navy);margin-bottom:6px;font-size:.95rem}
.field .req{color:var(--red);margin-left:2px}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid #AEB7C1;border-radius:4px;font:inherit;background:#fff;color:var(--text)}
.field textarea{min-height:150px;resize:vertical}
.field .hint{font-size:.82rem;color:var(--steel);margin-top:4px}
.field .error{font-size:.85rem;color:var(--red);margin-top:4px;display:none}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:var(--red)}
.field.invalid .error{display:block}
.hint-box{background:var(--gray);border-left:4px solid var(--navy);padding:12px 16px;margin:0;font-size:.92rem;color:var(--text)}
.form-status{padding:14px 16px;border-radius:4px;display:none}
.form-status.show{display:block}
.form-status.ok{background:#E8F4EC;color:#1E5B34}
.form-status.err{background:#FDECEA;color:#8E1F1B}
.contact-card{background:var(--gray);border-radius:var(--radius);padding:24px}
.contact-card dl{display:grid;grid-template-columns:max-content 1fr;gap:8px 16px;margin:0 0 16px}
.contact-card dt{color:var(--steel)}
.contact-card dd{margin:0;font-weight:600}
.map{width:100%;aspect-ratio:4/3;border:0;border-radius:var(--radius);background:var(--gray)}

/* 詢價帶 */
.cta{background:var(--navy);color:#fff;padding:56px 0}
.cta h2{color:#fff}
.cta .wrap{display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.cta p{margin:0;opacity:.88}
.cta .cta-actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.cta a.tel{color:#fff;font-size:1.3rem;font-weight:700;text-decoration:none}

/* 圖示 */
.icon{width:40px;height:40px;stroke:var(--navy);fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.icon.sm{width:28px;height:28px}

/* 頁尾 */
.site-footer{background:var(--navy-dark);color:#C9D3DE;font-size:.9rem;padding:48px 0 24px}
.site-footer a{color:#C9D3DE}
.site-footer .cols{display:grid;gap:32px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.site-footer h2{color:#fff;font-size:1rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:4px}
.site-footer .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:16px;font-size:.8rem}

/* 技術支援 */
.fuel-table{min-width:1180px}
.fuel-table thead tr.groups th{background:var(--navy-dark);font-size:.85rem;text-align:center}
.fuel-table td{text-align:center;vertical-align:top}
.fuel-table td.bio,.fuel-table th.bio{background:#EEF6F1}
.fuel-table thead th.bio{background:#2F5D3A}
.fuel-table input.price{width:100%;max-width:120px;padding:6px 8px;border:1px solid #AEB7C1;border-radius:4px;font:inherit;text-align:right}
.fuel-table tr.results td{background:#F0F4F8;font-size:1.15rem;color:var(--navy)}
.fuel-table tr.results td.bio{background:#DDEFE4}
.matrix{min-width:1100px}
.matrix td.diag{background:#DDEFE4;font-weight:700}
table.spec.co2 td{white-space:normal;min-width:150px;font-size:.88rem}
.link-btn{background:none;border:0;padding:0;margin-left:12px;color:var(--navy);text-decoration:underline;font:inherit;cursor:pointer}
details.sources{background:var(--gray);border-radius:var(--radius);padding:16px 20px}
details.sources summary{cursor:pointer;font-weight:700;color:var(--navy)}
details.sources li{margin-bottom:8px;font-size:.92rem}
.notice{background:#FFF4E5;border-left:4px solid var(--orange);padding:12px 16px;border-radius:4px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin-bottom:12px}
.faq summary{cursor:pointer;font-weight:700;color:var(--navy)}
.faq details p{margin:10px 0 0}
.refs li{margin-bottom:10px}
.refs small{display:block;color:var(--steel)}
.cite{font-size:.75em;vertical-align:super;text-decoration:none;margin-left:2px}
.fig.grate img{aspect-ratio:16/9;object-fit:contain;background:#fff;border:1px solid var(--line)}
.fig.grate figcaption strong{display:block;color:var(--navy);font-size:1rem}
.fig.grate figcaption span{display:block;font-size:.85rem}
.calc-thumb{flex-direction:column;background:linear-gradient(135deg,var(--navy),#2E5A86);color:#fff}
.calc-thumb span{font-family:"Inter",sans-serif;font-size:2rem;font-weight:700}
.calc-thumb small{opacity:.85}
.calc-thumb.soil{background:linear-gradient(135deg,#2F5D3A,#4C8A58)}
.warning-band h2{color:#fff}

/* 試算、幣別切換、影片 */
.cur-switch{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-weight:600;color:var(--navy)}
.cur-switch button{border:2px solid var(--navy);background:#fff;color:var(--navy);padding:6px 14px;border-radius:4px;font:inherit;font-weight:600;cursor:pointer}
.cur-switch button[aria-pressed="true"]{background:var(--navy);color:#fff}
.rate-field{font-weight:400;color:var(--text);margin-left:8px;display:inline-flex;align-items:center;gap:6px}
.rate-field input{width:90px;padding:6px 8px;border:1px solid #AEB7C1;border-radius:4px;font:inherit}
.cur-switch small{color:var(--steel);font-weight:400;flex-basis:100%}
.input-unit{display:flex;align-items:stretch}
.input-unit input{border-radius:4px 0 0 4px}
.input-unit span{display:flex;align-items:center;padding:0 10px;background:var(--gray);border:1px solid #AEB7C1;border-left:0;border-radius:0 4px 4px 0;font-size:.9rem;white-space:nowrap;color:var(--steel)}
.calc-result dd{font-family:"Inter","Noto Sans TC",sans-serif;font-size:1.15rem;color:var(--navy)}
.video-wrap{position:relative;aspect-ratio:16/9;background:#000;border-radius:var(--radius);overflow:hidden}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

@media print{.site-header,.cta,.site-footer,.subnav{display:none}}