:root{
  --blue-600:#526b86;
  --blue-700:#3d4e67;
  --blue-500:#688ab1;
  --blue-100:#d6e1ec;
  --blue-50:#e9eff5;
  --rose-50:#f9e9ec;
  --rose-100:#f1d3db;
  --rose-500:#c45f7b;
  --rose-600:#a94a61;
  --accent:#a94a61;
  --ink:#0f172a;
  --gray-600:#475569;
  --gray-400:#94a3b8;
  --gray-100:#f1f5f9;
  --line:#e2e8f0;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0;}
body{
  font-family:"Manrope","Noto Sans TC","PingFang TC","Microsoft JhengHei",-apple-system,BlinkMacSystemFont,sans-serif;
  color:var(--ink);
  background:#fff;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}
.mi{font-family:"Material Icons Round";font-size:20px;line-height:1;vertical-align:middle;}
.mi-inline{font-size:15px;vertical-align:-3px;margin-right:1px;}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;}
.brand .mark{width:36px;height:36px;border-radius:10px;object-fit:cover;flex:none;}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--gray-400);}
nav.links{display:flex;align-items:center;gap:28px;font-size:14px;color:var(--gray-600);}
nav.links a:hover{color:var(--blue-600);}
.nav-dropdown{position:relative;}
.nav-dropdown>a{display:inline-flex;align-items:center;gap:2px;}
.nav-dropdown>a .mi{font-size:16px;}
.nav-dropdown-menu{position:absolute;top:100%;left:0;margin-top:8px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:8px;min-width:170px;box-shadow:0 16px 32px -16px rgba(15,23,42,.25);opacity:0;visibility:hidden;transform:translateY(-6px);transition:.15s;z-index:100;}
.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{opacity:1;visibility:visible;transform:translateY(0);}
.nav-dropdown-menu a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--gray-600);}
.nav-dropdown-menu a:hover{background:var(--blue-50);color:var(--blue-600);}
.cta-btn{background:var(--blue-600);color:#fff;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;white-space:nowrap;}
.cta-btn:hover{background:var(--blue-700);}
.nav-right{display:flex;align-items:center;gap:24px;}

/* Hero */
.hero{background:linear-gradient(180deg,var(--blue-50) 0%, #fff 100%);padding:64px 0 40px;overflow:hidden;}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;}
.eyebrow{display:inline-flex;align-items:center;gap:7px;background:var(--rose-50);border:1px solid var(--rose-100);color:var(--rose-600);font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;margin-bottom:20px;box-shadow:0 4px 12px -6px rgba(169,74,97,.3);}
h1{font-size:40px;line-height:1.3;font-weight:800;letter-spacing:-.01em;margin-bottom:16px;}
h1 .accent{color:var(--blue-600);}
.hero p.lead{font-size:17px;color:var(--gray-600);margin-bottom:28px;max-width:480px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;}
.btn-primary{background:var(--blue-600);color:#fff;padding:14px 24px;border-radius:12px;font-weight:700;font-size:15px;display:inline-block;}
.btn-primary:hover{background:var(--blue-700);}
.btn-ghost{background:#fff;color:var(--ink);padding:14px 24px;border-radius:12px;font-weight:600;font-size:15px;border:1px solid var(--line);display:inline-block;}
.btn-ghost:hover{border-color:var(--blue-600);color:var(--blue-600);}
.hero-note{margin-top:20px;font-size:13px;color:var(--gray-400);}
.hero-img{border-radius:20px;overflow:hidden;}
.hero-img img{width:100%;height:auto;display:block;aspect-ratio:1024/683;}

/* Stats strip */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);padding:28px 0;}
.stats-grid div{text-align:center;}
.stats-grid .num{font-size:26px;font-weight:800;color:var(--blue-600);}
.stats-grid .label{font-size:13px;color:var(--gray-600);margin-top:4px;}

/* Section heading */
.section{padding:72px 0;}
.section-head{text-align:center;max-width:560px;margin:0 auto 44px;}
.section-head .tag{color:var(--rose-600);font-weight:800;font-size:13px;letter-spacing:.06em;text-transform:uppercase;}
.section-head h2{font-size:28px;font-weight:800;margin:10px 0 12px;}
.section-head p{color:var(--gray-600);font-size:15px;}

/* Tool groups: each category is a heading strip + a grid of individual tool cards */
.tool-group{margin-bottom:44px;}
.tool-group:last-child{margin-bottom:0;}
.tool-group-head{display:flex;align-items:center;gap:16px;margin-bottom:20px;}
.tool-group-head .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,var(--blue-50),var(--blue-100));color:var(--blue-600);display:flex;align-items:center;justify-content:center;flex:none;box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 3px 10px -3px rgba(82,107,134,.35);}
.tool-group-head h3{font-size:19px;font-weight:800;margin-bottom:3px;}
.tool-group-head p{font-size:13.5px;color:var(--gray-600);}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.tool-card{border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:10px;min-height:150px;transition:.15s;}
.tool-card:hover{border-color:var(--blue-600);box-shadow:0 10px 26px -14px rgba(82,107,134,.4);transform:translateY(-2px);}
.tool-card .icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--blue-50),var(--blue-100));color:var(--blue-600);display:flex;align-items:center;justify-content:center;flex:none;box-shadow:inset 0 1px 0 rgba(255,255,255,.7),0 2px 8px -2px rgba(82,107,134,.3);}
.tool-card h4{font-size:15.5px;font-weight:700;}
.tool-card p{font-size:13px;color:var(--gray-600);line-height:1.55;flex:1;}

/* Blog teaser (home page) */
.blog-teaser{background:var(--gray-100);border-radius:24px;padding:48px;display:grid;grid-template-columns:1.1fr 1fr;gap:32px;align-items:center;}
.blog-teaser h2{font-size:24px;font-weight:800;margin-bottom:12px;}
.blog-teaser p{color:var(--gray-600);font-size:15px;margin-bottom:20px;}
.blog-cards{display:flex;flex-direction:column;gap:12px;}
.blog-card{background:#fff;border-radius:12px;padding:16px 18px;border:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-size:14px;gap:10px;}
.blog-card:hover{border-color:var(--blue-600);}
.blog-card .soon{font-size:11px;color:var(--gray-400);background:#fff;border:1px solid var(--line);padding:3px 8px;border-radius:999px;flex:none;}

/* Trust / disclaimer */
.disclaimer{background:#fffbeb;border:1px solid #fde68a;border-radius:14px;padding:20px 24px;font-size:13px;color:#92400e;margin-top:8px;}

/* Footer */
footer{border-top:1px solid var(--line);padding:48px 0 32px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px;}
.footer-grid h4{font-size:13px;font-weight:700;margin-bottom:14px;color:var(--gray-400);text-transform:uppercase;letter-spacing:.04em;}
.footer-grid a{display:block;font-size:14px;color:var(--gray-600);margin-bottom:10px;}
.footer-grid a:hover{color:var(--blue-600);}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--line);font-size:13px;color:var(--gray-400);flex-wrap:wrap;gap:12px;}

/* ---- Blog: index listing ---- */
.blog-hero{padding:56px 0 8px;}
.blog-hero h1{font-size:34px;}
.blog-filter{display:flex;gap:10px;flex-wrap:wrap;margin:28px 0 36px;}
.blog-filter a{font-size:13px;font-weight:600;color:var(--gray-600);background:var(--gray-100);padding:8px 16px;border-radius:999px;}
.blog-filter a.active{background:var(--blue-600);color:#fff;}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.15s;}
.post-card:hover{border-color:var(--blue-600);box-shadow:0 8px 24px -12px rgba(82,107,134,.35);}
.post-card .thumb{height:140px;background:linear-gradient(135deg,var(--blue-50),var(--blue-100));display:flex;align-items:center;justify-content:center;font-size:40px;}
.post-card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.post-card .cat{font-size:12px;font-weight:700;color:var(--blue-600);}
.post-card h3{font-size:16px;font-weight:700;line-height:1.5;}
.post-card p{font-size:13px;color:var(--gray-600);flex:1;}
.post-card .date{font-size:12px;color:var(--gray-400);}

/* ---- Blog: article page ---- */
.article{padding:48px 0 80px;}
.article-wrap{max-width:720px;margin:0 auto;padding:0 24px;}
.article-cat{color:var(--blue-600);font-weight:700;font-size:13px;}
.article h1{font-size:30px;margin:12px 0 16px;}
.article .meta{font-size:13px;color:var(--gray-400);margin-bottom:32px;}
.article .lead-p{font-size:17px;color:var(--gray-600);margin-bottom:32px;}
.prose h2{font-size:22px;font-weight:800;margin:40px 0 16px;}
.prose h3{font-size:17px;font-weight:700;margin:28px 0 12px;}
.prose p{font-size:15.5px;color:#334155;margin-bottom:16px;}
.prose ul,.prose ol{margin:0 0 16px 22px;font-size:15.5px;color:#334155;}
.prose li{margin-bottom:8px;}
.prose table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.prose th{background:var(--gray-100);}
.tool-cta{margin:32px 0;background:var(--blue-50);border:1px solid var(--blue-100);border-radius:14px;padding:24px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;}
.tool-cta strong{display:block;font-size:15px;margin-bottom:4px;}
.tool-cta span{font-size:13px;color:var(--gray-600);}
.related{margin-top:56px;border-top:1px solid var(--line);padding-top:32px;}
.related h4{font-size:14px;color:var(--gray-400);margin-bottom:16px;text-transform:uppercase;letter-spacing:.04em;}

/* ---- Calculator tool pages ---- */
.tool-hero{padding:44px 0 8px;}
.tool-hero h1{font-size:28px;}
.tool-hero p.lead{max-width:640px;}
.calc-section{padding:16px 0 64px;}
.calc-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:start;}
.calc-card{border:1px solid var(--line);border-radius:var(--radius);padding:28px;}
.calc-card h2{font-size:16px;font-weight:700;margin-bottom:20px;}
.field{margin-bottom:18px;}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--gray-600);}
.field .hint{font-size:12px;color:var(--gray-400);margin-top:4px;}
.field input[type="text"],.field input[type="number"],.field input[type="date"],.field select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;
}
.field input:focus,.field select:focus{outline:2px solid var(--blue-100);border-color:var(--blue-600);}
.field-row{display:flex;gap:12px;}
.field-row .field{flex:1;}
.seg-btns{display:flex;gap:8px;flex-wrap:wrap;}
.seg-btn{padding:9px 16px;border-radius:999px;border:1px solid var(--line);font-size:13px;cursor:pointer;background:#fff;color:var(--gray-600);font-family:inherit;}
.seg-btn.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600);}
.result-card{background:var(--blue-50);border:1px solid var(--blue-100);border-radius:var(--radius);padding:28px;position:sticky;top:88px;}
.result-card h2{font-size:16px;font-weight:700;margin-bottom:16px;color:var(--blue-700);}
.result-row{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;border-bottom:1px dashed var(--blue-100);font-size:14px;color:var(--gray-600);gap:12px;}
.result-row:last-child{border-bottom:none;}
.result-row .val{font-weight:700;color:var(--ink);white-space:nowrap;}
.result-total{margin-top:16px;padding-top:16px;border-top:2px solid var(--blue-100);display:flex;justify-content:space-between;align-items:baseline;}
.result-total .num{font-size:26px;font-weight:800;color:var(--blue-700);}
.result-note{font-size:12px;color:var(--gray-400);margin-top:14px;line-height:1.6;}
.formula-box{background:var(--gray-100);border-radius:12px;padding:16px 18px;font-size:13px;color:var(--gray-600);margin-top:16px;font-family:"SF Mono",Consolas,monospace;line-height:1.8;}
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--gray-600);margin-bottom:20px;}
.back-link:hover{color:var(--blue-600);}
.copy-btn{width:100%;text-align:center;margin-top:16px;padding:11px;font-size:13.5px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;}
.copy-btn:disabled{opacity:.7;cursor:default;}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;color:var(--ink);}
.menu-toggle .mi{font-size:26px;}
.mobile-menu{display:none;flex-direction:column;padding:8px 24px 16px;border-top:1px solid var(--line);background:#fff;}
.mobile-menu a{padding:11px 0;font-size:14.5px;color:var(--gray-600);border-bottom:1px solid var(--line);}
.mobile-menu a:last-child{border-bottom:none;}
.mobile-menu.open{display:flex;}
@media (max-width:880px){
  .calc-layout{grid-template-columns:1fr;}
  .result-card{position:static;}
}
@media (max-width:880px){
  nav.links{display:none;}
  .menu-toggle{display:block;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-img{order:-1;}
  h1{font-size:32px;}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;}
  .tool-grid{grid-template-columns:1fr 1fr;}
  .blog-teaser{grid-template-columns:1fr;padding:32px 24px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .post-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:520px){
  .tool-grid{grid-template-columns:1fr;}
  .tool-group-head{align-items:flex-start;}
  .post-grid{grid-template-columns:1fr;}
  .tool-cta{flex-direction:column;align-items:flex-start;}
}

/* ---- Dynamic-row tables: collapse to stacked cards on narrow screens ---- */
@media (max-width:640px){
  .eq-table, .ubo-table, .exp-table, .prod-table{border-spacing:0;}
  .eq-table thead, .ubo-table thead, .exp-table thead, .prod-table thead{
    position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;
  }
  .eq-table tbody, .ubo-table tbody, .exp-table tbody, .prod-table tbody{display:block;}
  .eq-table tr, .ubo-table tr, .exp-table tr, .prod-table tr{
    display:block;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:12px;
  }
  .eq-table td, .ubo-table td, .exp-table td, .prod-table td{
    display:block;padding:6px 0;width:auto !important;
  }
  .eq-table td[data-label]::before, .ubo-table td[data-label]::before,
  .exp-table td[data-label]::before, .prod-table td[data-label]::before{
    content:attr(data-label);display:block;font-size:11px;font-weight:700;
    color:var(--gray-400);margin-bottom:4px;text-transform:uppercase;letter-spacing:.02em;
  }
  .eq-table td:last-child, .ubo-table td:last-child, .exp-table td:last-child, .prod-table td:last-child{
    text-align:right;padding-top:2px;
  }
  .eq-table td:last-child .remove, .ubo-table td:last-child .remove,
  .exp-table td:last-child .remove, .prod-table td:last-child .remove{
    font-size:13px;color:#dc2626;background:var(--gray-100);padding:6px 14px;border-radius:8px;
  }
}