:root {
  color-scheme: light;
  --ink: #17221d;
  --muted: #5d6963;
  --paper: #f7f4ec;
  --card: #fffdf8;
  --green: #176b4d;
  --green-dark: #0f4d38;
  --mint: #dcefe5;
  --amber: #f2c45e;
  --line: #d8ddd7;
  --shadow: 0 18px 45px rgb(23 34 29 / 9%);
  font-family: Inter, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.7; }
a { color: var(--green-dark); text-underline-offset: 3px; }
a:hover { color: var(--green); }
button, input, select { font: inherit; }
.site-header { border-bottom: 1px solid rgb(23 34 29 / 10%); background: rgb(247 244 236 / 93%); backdrop-filter: blur(14px); position: sticky; top: 0; z-index: 10; }
.nav, main, .site-footer { width: min(1120px, calc(100% - 32px)); margin-inline: auto; }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 66px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: var(--green); color: white; }
.nav-links { display: flex; gap: 18px; font-size: .94rem; }
main { padding-block: 56px 88px; }
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); gap: 34px; align-items: center; margin-bottom: 48px; }
.eyebrow { color: var(--green); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; }
h1 { margin: 10px 0 18px; font-size: clamp(2.35rem, 5vw, 4.7rem); max-width: 14ch; overflow-wrap: anywhere; }
h2 { margin-top: 48px; font-size: clamp(1.65rem, 3vw, 2.35rem); }
h3 { font-size: 1.15rem; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 66ch; }
.fine-print, .muted { color: var(--muted); font-size: .9rem; }
.answer-card, .calculator, .source-card, .model-card, .notice, .metric { background: var(--card); border: 1px solid var(--line); border-radius: 22px; box-shadow: var(--shadow); }
.answer-card { padding: 28px; position: relative; overflow: hidden; }
.answer-card::before { content: ""; position: absolute; width: 170px; height: 170px; border-radius: 50%; background: var(--mint); right: -60px; top: -70px; }
.answer-value { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 850; color: var(--green-dark); line-height: 1.1; position: relative; }
.answer-label { color: var(--muted); margin: 8px 0 20px; position: relative; }
.pill-row { display: flex; flex-wrap: wrap; gap: 8px; position: relative; }
.pill { padding: 6px 11px; border-radius: 999px; background: var(--mint); font-size: .84rem; font-weight: 700; }
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 28px 0; }
.metric { padding: 20px; box-shadow: none; }
.metric dt { color: var(--muted); font-size: .84rem; }
.metric dd { margin: 6px 0 0; font-size: 1.25rem; font-weight: 800; }
.calculator { padding: 26px; margin-top: 24px; }
.form-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.field { display: grid; gap: 6px; }
.field label { font-size: .86rem; font-weight: 750; }
.field input, .field select { width: 100%; border: 1px solid #bbc5bf; border-radius: 12px; background: white; padding: 11px 12px; color: var(--ink); }
.field input:focus, .field select:focus { outline: 3px solid rgb(23 107 77 / 20%); border-color: var(--green); }
.button, button[type="submit"] { display: inline-flex; justify-content: center; align-items: center; border: 0; border-radius: 12px; padding: 12px 18px; background: var(--green); color: white; font-weight: 800; cursor: pointer; text-decoration: none; }
.button:hover, button[type="submit"]:hover { color: white; background: var(--green-dark); }
.button.secondary { background: transparent; color: var(--green-dark); border: 1px solid var(--green); }
.calculator-actions { display: flex; gap: 12px; align-items: center; margin-top: 18px; flex-wrap: wrap; }
.result { min-height: 72px; margin-top: 20px; padding: 16px; border-radius: 14px; background: var(--mint); }
.result strong { font-size: 1.35rem; color: var(--green-dark); }
.model-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.model-card { display: flex; min-width: 0; flex-direction: column; padding: 22px; box-shadow: none; }
.model-card-company { margin: 0; color: var(--green); font-size: .86rem; font-weight: 750; }
.model-card h3 { margin: 3px 0 0; overflow-wrap: anywhere; font-size: 1.35rem; }
.model-card-specs { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 1px; overflow: hidden; margin: 16px 0 12px; border: 1px solid var(--line); border-radius: 14px; background: var(--line); }
.model-card-specs div { min-width: 0; padding: 10px 12px; background: var(--card); }
.model-card-specs dt { color: var(--muted); font-size: .76rem; }
.model-card-specs dd { margin: 1px 0 0; font-weight: 800; overflow-wrap: anywhere; }
.model-card-estimate { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.model-card-estimate div { padding: 13px 14px; border-radius: 14px; background: var(--mint); }
.model-card-estimate span { display: block; color: var(--muted); font-size: .76rem; }
.model-card-estimate strong { display: block; margin-top: 1px; color: var(--green-dark); font-size: 1.15rem; line-height: 1.35; }
.model-card-assumption { margin: 9px 0 10px; color: var(--muted); font-size: .78rem; line-height: 1.55; }
.model-card-energy { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 0; color: var(--muted); font-size: .88rem; }
.model-card a { display: inline-block; align-self: flex-start; margin-top: 14px; font-weight: 750; }
.source-card, .notice { padding: 22px; box-shadow: none; margin-top: 24px; }
.hub-source { margin-bottom: 24px; border-left: 5px solid var(--green); }
.hub-source p { margin: 8px 0 0; }
.model-browser { margin: 32px 0 24px; padding: 24px; border: 1px solid var(--line); border-radius: 22px; background: var(--card); }
.model-browser-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; }
.model-browser-heading h2 { margin: 0 0 4px; font-size: 1.5rem; }
.model-browser-heading p { margin: 0; color: var(--muted); }
.model-browser-heading > a { flex: 0 0 auto; font-weight: 750; }
.model-browser-controls { display: grid; grid-template-columns: minmax(0, 1.5fr) repeat(2, minmax(0, .75fr)); gap: 12px; margin-top: 20px; }
.model-browser-controls label { color: var(--muted); font-size: .82rem; font-weight: 750; }
.model-browser-controls input, .model-browser-controls select { display: block; width: 100%; margin-top: 5px; padding: 11px 12px; border: 1px solid #bbc5bf; border-radius: 12px; background: white; color: var(--ink); }
.model-browser-controls input:focus, .model-browser-controls select:focus { outline: 3px solid rgb(23 107 77 / 20%); border-color: var(--green); }
.model-browser-summary { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 14px; }
.model-browser-summary p { margin: 0; color: var(--muted); }
.model-browser-summary .button { padding: 7px 12px; font-size: .84rem; }
.notice { border-left: 5px solid var(--amber); }
.cta-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 28px; margin: 36px 0; border-radius: 22px; color: white; background: var(--green-dark); }
.cta-band h2 { margin: 0 0 8px; }
.cta-band p { margin: 0; color: rgb(255 255 255 / 75%); }
.cta-band .button { background: var(--amber); color: #372a0c; }
.breadcrumbs { margin-bottom: 22px; color: var(--muted); font-size: .88rem; }
.breadcrumbs ol { display: flex; gap: 8px; list-style: none; padding: 0; flex-wrap: wrap; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: #9da7a1; }
.site-footer { border-top: 1px solid var(--line); padding-block: 30px 48px; color: var(--muted); font-size: .9rem; }

@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .model-browser-heading { align-items: start; flex-direction: column; gap: 8px; }
  .model-browser-controls { grid-template-columns: 1fr 1fr; }
  .model-browser-controls label:first-child { grid-column: 1 / -1; }
}
@media (max-width: 560px) {
  .nav { align-items: flex-start; padding-block: 12px; }
  .nav-links { display: grid; gap: 3px; text-align: right; }
  main { padding-top: 34px; }
  .metrics, .model-grid, .form-grid { grid-template-columns: 1fr; }
  .model-card-estimate, .model-browser-controls { grid-template-columns: 1fr; }
  .model-browser-controls label:first-child { grid-column: auto; }
  .model-browser-summary { align-items: flex-start; flex-direction: column; }
  .cta-band { grid-template-columns: 1fr; }
  .answer-card, .calculator { padding: 20px; }
}