/* 裝下修 — mobile-first */
:root {
  --bg: #f7f5f1;
  --bg-alt: #eef3f2;
  --surface: #ffffff;
  --ink: #1a2423;
  --ink-muted: #4a5a57;
  --brand: #0f3d3a;
  --brand-2: #1a5c57;
  --accent: #c4a35a;
  --accent-soft: #f3ebD6;
  --wa: #128c7e;
  --wa-hover: #0e6f64;
  --line: #d8e0de;
  --danger: #b42318;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 61, 58, 0.08);
  --font: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --header-h: 64px;
  --sticky-h: 68px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  padding-bottom: var(--sticky-h);
}
img { max-width: 100%; display: block; }
a { color: var(--brand-2); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brand); }
.wrap { width: min(1100px, calc(100% - 2rem)); margin-inline: auto; }
.eyebrow {
  display: inline-block;
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--brand-2);
}
.section { padding: 4rem 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 640px; margin-bottom: 2.25rem; }
.section-head h2 { margin: 0 0 0.75rem; font-size: clamp(1.5rem, 4vw, 2rem); line-height: 1.25; }
.section-desc { margin: 0; color: var(--ink-muted); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 245, 241, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-h);
}
.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}
.logo-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.95rem;
}
.logo-text { font-size: 1.05rem; }
.nav {
  display: none;
  gap: 1.1rem;
  margin-left: auto;
  font-size: 0.92rem;
}
.nav a { color: var(--ink-muted); text-decoration: none; }
.nav a:hover { color: var(--brand); }
.nav-cta {
  color: var(--brand) !important;
  font-weight: 600;
}
.header-wa {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--wa);
  text-decoration: none;
  border: 1px solid color-mix(in srgb, var(--wa) 35%, white);
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: #fff;
}
.header-wa:hover { background: #e8f6f3; color: var(--wa-hover); }

/* Hero */
.hero {
  padding: 2.5rem 0 3.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 10% 0%, rgba(196, 163, 90, 0.18), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 20%, rgba(26, 92, 87, 0.12), transparent 50%),
    var(--bg);
}
.hero-grid {
  display: grid;
  gap: 1.75rem;
}
.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 6vw, 2.75rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.h1-sub {
  display: block;
  margin-top: 0.35rem;
  font-size: clamp(1.05rem, 3.2vw, 1.35rem);
  font-weight: 600;
  letter-spacing: 0;
  color: var(--brand-2);
  line-height: 1.35;
}
.lead { margin: 0 0 1.5rem; font-size: 1.05rem; color: var(--ink-muted); max-width: 36rem; }
.lead strong { color: var(--ink); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1.5rem; }
.hero-trust {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  font-size: 0.92rem;
  color: var(--ink-muted);
}
.hero-trust li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.hero-trust li::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  margin-top: 0.45rem;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  align-self: start;
}
.hero-card h2 { margin: 0 0 0.5rem; font-size: 1.2rem; }
.hero-card p { margin: 0 0 1rem; color: var(--ink-muted); }
.hero-card .btn-wa { width: 100%; margin-bottom: 0.75rem; }
.link-email {
  display: block;
  font-size: 0.92rem;
  word-break: break-all;
  margin-bottom: 0.75rem;
}
.hero-note { font-size: 0.85rem; margin: 0 !important; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover { background: var(--brand-2); color: #fff; }
.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); }
.btn-wa {
  background: var(--wa);
  color: #fff;
}
.btn-wa:hover { background: var(--wa-hover); color: #fff; }

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}
.step {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.25rem 1.1rem;
  box-shadow: 0 2px 8px rgba(15, 61, 58, 0.04);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.step.is-active {
  border-color: color-mix(in srgb, var(--brand) 40%, var(--line));
  box-shadow: var(--shadow);
}
.step-num {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--brand);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.65rem;
}
.step h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.step p { margin: 0; color: var(--ink-muted); font-size: 0.95rem; }
.step-progress {
  display: none;
  height: 4px;
  background: var(--line);
  border-radius: 999px;
  margin-top: 1.75rem;
  overflow: hidden;
}
.step-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transition: width 0.35s ease;
}

/* Cards / callout */
.cards-2 {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.cards-4 {
  display: grid;
  gap: 1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem;
}
.card h3 { margin: 0 0 0.75rem; font-size: 1.1rem; }
.pillar-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  box-shadow: 0 2px 8px rgba(15, 61, 58, 0.04);
  border-top: 3px solid var(--accent);
}
.pillar-tag {
  margin: 0 0 0.15rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--brand-2);
}
.pillar-card h3 { margin: 0 0 0.5rem; }
.pillar-card p:last-child {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
  flex: 1;
}
.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
}
.check-list li {
  padding-left: 1.4rem;
  position: relative;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--brand-2);
  font-weight: 700;
}
.callout {
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 45%, white);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}
.callout h3 { margin: 0 0 0.5rem; font-size: 1.05rem; }
.callout p { margin: 0; color: var(--ink-muted); }

/* Budget */
.budget-grid {
  display: grid;
  gap: 2rem;
}
.budget-grid h2 { margin: 0 0 0.85rem; font-size: clamp(1.45rem, 4vw, 1.9rem); }
.budget-grid > div > p { color: var(--ink-muted); }
.note-box {
  margin-top: 1.25rem !important;
  padding: 1rem 1.15rem;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
}
.budget-points { display: grid; gap: 0.85rem; }
.bp {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
}
.bp-label {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.9rem;
  min-width: 1.75rem;
}
.bp p { margin: 0; }

/* Form */
.quote-form {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.35rem;
  box-shadow: var(--shadow);
}
.form-grid {
  display: grid;
  gap: 1rem;
}
.field {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 500;
}
.field abbr { color: var(--danger); text-decoration: none; }
.field input,
.field select,
.field textarea {
  font: inherit;
  font-weight: 400;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  width: 100%;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid color-mix(in srgb, var(--brand) 35%, white);
  border-color: var(--brand-2);
}
.field input.is-invalid,
.field select.is-invalid,
.field textarea.is-invalid {
  border-color: var(--danger);
}
.field-full { grid-column: 1 / -1; }
.consent {
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 0.65rem;
  font-weight: 400;
  color: var(--ink-muted);
}
.consent input { width: auto; margin-top: 0.25rem; }
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}
.form-hint {
  min-height: 1.4em;
  margin: 0.85rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}
.form-hint.is-error { color: var(--danger); }
.form-hint.is-ok { color: var(--brand-2); }
.success-panel {
  margin-top: 1.5rem;
  padding: 1.35rem;
  background: #e8f5f2;
  border: 1px solid color-mix(in srgb, var(--wa) 30%, white);
  border-radius: var(--radius);
}
.success-panel h3 { margin: 0 0 0.5rem; }
.success-panel p { margin: 0 0 1rem; color: var(--ink-muted); }
.summary-box {
  margin: 1rem 0 0;
  padding: 1rem;
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--line);
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  line-height: 1.5;
  max-height: 240px;
  overflow: auto;
}

/* Contractor CTA */
.cta-banner {
  display: grid;
  gap: 1.25rem;
  background: var(--brand);
  color: #e8f0ef;
  border-radius: calc(var(--radius) + 4px);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
}
.cta-banner .eyebrow { color: var(--accent); }
.cta-banner h2 { margin: 0 0 0.5rem; color: #fff; }
.cta-banner p { margin: 0; color: #c5d5d3; }
.cta-banner-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.cta-banner .btn-primary {
  background: var(--accent);
  color: var(--brand);
}
.cta-banner .btn-primary:hover { background: #d4b56a; color: var(--brand); }
.cta-banner .btn-ghost {
  border-color: rgba(255,255,255,0.35);
  color: #fff;
}
.cta-banner .btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.08); }

/* FAQ */
.faq-list { display: grid; gap: 0.65rem; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.15rem 1.1rem 0.15rem;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.95rem 0;
  list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--brand-2);
  font-weight: 700;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p {
  margin: 0 0 1rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* Footer */
.site-footer {
  background: #0a2a28;
  color: #b8c9c6;
  padding: 2.5rem 0 1.5rem;
}
.footer-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}
.footer-brand {
  margin: 0 0 0.35rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}
.footer-owner { font-size: 0.9rem; }
.site-footer a { color: #e0ebe9; text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.85rem 1.25rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1rem;
  font-size: 0.82rem;
  color: #8aa09c;
}
.footer-bottom p { margin: 0; }

/* Sticky CTA (mobile) */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 40;
  display: flex;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem calc(0.65rem + env(safe-area-inset-bottom));
  background: rgba(255,255,255,0.96);
  border-top: 1px solid var(--line);
  box-shadow: 0 -6px 20px rgba(0,0,0,0.06);
}
.sticky-cta .btn { flex: 1; padding: 0.7rem 0.5rem; font-size: 0.9rem; }
.sticky-cta.is-hidden { transform: translateY(110%); pointer-events: none; opacity: 0; transition: 0.25s; }
.sticky-cta { transition: transform 0.25s, opacity 0.25s; }

/* Desktop */
@media (min-width: 768px) {
  body { padding-bottom: 0; }
  .nav { display: flex; }
  .header-wa { margin-left: 0; }
  .hero-grid { grid-template-columns: 1.35fr 0.9fr; align-items: center; gap: 2.5rem; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 1.1rem; }
  .step-progress { display: block; }
  .cards-2 { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
  .cards-4 { grid-template-columns: 1fr 1fr; gap: 1.25rem; }
  .budget-grid { grid-template-columns: 1.2fr 0.9fr; align-items: start; }
  .form-grid { grid-template-columns: 1fr 1fr; }
  .quote-form { padding: 1.75rem; }
  .cta-banner {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 2rem 2.25rem;
  }
  .footer-grid { grid-template-columns: 1.2fr 1fr 0.8fr; }
  .sticky-cta { display: none; }
}

@media (min-width: 1024px) {
  .steps { grid-template-columns: repeat(3, 1fr); }
  .cards-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}