:root {
  --bg: #ffffff;
  --bg-muted: #f6f4ef;
  --text: #1f2933;
  --text-muted: #5b6470;
  --border: #ddd7cd;
  --primary: #243746;
  --primary-hover: #162532;
  --accent: #b08d57;
  --card: #ffffff;
  --shadow: 0 20px 50px rgba(31, 41, 51, 0.08);
  --radius: 18px;
  --max-width: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
html[data-lang="cn"] body { font-family: Arial, "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif; }
a { color: inherit; text-decoration: none; }
.container { width: min(100% - 40px, var(--max-width)); margin: 0 auto; }
.narrow { max-width: 760px; text-align: center; }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--border); backdrop-filter: blur(12px); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; }
.brand-logo img { display: block; width: 190px; max-width: 42vw; height: auto; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 2px solid var(--primary); border-radius: 50%; color: var(--primary); font-size: 18px; }
.brand-text { font-size: 17px; letter-spacing: .02em; }
.site-nav { display: flex; gap: 24px; align-items: center; margin-left: auto; }
.site-nav a { color: var(--text-muted); font-weight: 600; font-size: 14px; }
.site-nav a:hover { color: var(--primary); }
.nav-actions { display: flex; align-items: center; gap: 10px; order: 3; }
.lang-toggle { min-height: 38px; padding: 0 14px; border: 1px solid var(--border); border-radius: 999px; background: #fff; color: var(--primary); font-weight: 800; cursor: pointer; }
.lang-toggle:hover { border-color: var(--primary); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--primary); margin: 5px 0; }
.hero { padding: 92px 0 74px; background: linear-gradient(135deg, rgba(176,141,87,.14), rgba(36,55,70,.08)), var(--bg); }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-weight: 700; font-size: 13px; text-transform: uppercase; letter-spacing: .12em; }
h1, h2, h3 { line-height: 1.15; margin: 0; }
h1 { font-size: clamp(40px, 6vw, 68px); letter-spacing: -.055em; max-width: 760px; }
h2 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.04em; margin-bottom: 18px; }
h3 { font-size: 19px; margin-bottom: 10px; }
.hero-text { margin: 22px 0 28px; font-size: 19px; color: var(--text-muted); max-width: 650px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 18px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; border: 1px solid transparent; font-weight: 700; cursor: pointer; transition: .2s ease; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background: #fff; color: var(--primary); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--primary); }
.note, .form-note { color: var(--text-muted); font-size: 14px; }
.hero-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px; }
.card-label { color: var(--accent); font-weight: 800; margin-bottom: 16px; letter-spacing: .08em; text-transform: uppercase; font-size: 12px; }
.hero-card ul { margin: 0; padding-left: 20px; }
.hero-card li { margin: 12px 0; }
.section { padding: 82px 0; }
.muted { background: var(--bg-muted); }
.section-heading { max-width: 760px; margin-bottom: 34px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.service-card, .feature, .step, .testimonial-placeholder, .contact-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.service-card { padding: 26px; min-height: 180px; }
.service-card p, .feature p, .step p, .value p, .contact p, .estimate p { color: var(--text-muted); margin: 0; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 44px; align-items: start; }
.feature-list { display: grid; gap: 16px; }
.feature { padding: 24px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { padding: 26px; }
.step span { display: grid; place-items: center; width: 38px; height: 38px; background: var(--primary); color: #fff; border-radius: 50%; font-weight: 800; margin-bottom: 18px; }
.photo-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.photo-placeholder { min-height: 230px; display: grid; place-items: center; border: 1px dashed #bcb4a6; border-radius: var(--radius); background: #fbfaf7; color: var(--text-muted); font-weight: 700; }
.testimonial-placeholder { margin-top: 18px; padding: 22px; }
.estimate { background: var(--primary); color: #fff; }
.estimate .eyebrow, .estimate .form-note { color: #d8c19a; }
.estimate p { color: rgba(255,255,255,.78); }
.estimate-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 44px; align-items: start; }
.estimate-form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; background: #fff; color: var(--text); padding: 26px; border-radius: var(--radius); box-shadow: var(--shadow); }
.form-row { display: grid; gap: 8px; }
.form-row.full, .btn.full, .form-status { grid-column: 1 / -1; }
label { font-weight: 700; font-size: 14px; }
input, textarea { width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 13px 14px; font: inherit; }
input:focus, textarea:focus { outline: 3px solid rgba(176,141,87,.24); border-color: var(--accent); }
.error-message { color: #b42318; min-height: 18px; font-size: 13px; }
.form-status { margin: 0; font-weight: 700; }
.form-status.success { color: #1f7a4d; }
.contact-card { padding: 32px; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.contact-details { background: var(--bg-muted); border-radius: 14px; padding: 20px; }
.site-footer { padding: 28px 0; background: #111820; color: rgba(255,255,255,.78); }
.footer-wrap { display: flex; justify-content: space-between; gap: 18px; }
.footer-wrap a { color: #fff; font-weight: 700; }
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .site-nav { position: absolute; top: 76px; left: 0; right: 0; display: none; flex-direction: column; align-items: flex-start; gap: 0; background: #fff; border-bottom: 1px solid var(--border); padding: 14px 20px; }
  .site-nav.open { display: flex; }
  .site-nav a { width: 100%; padding: 12px 0; }
  .hero-grid, .split, .estimate-grid, .contact-card { grid-template-columns: 1fr; }
  .cards, .steps, .photo-grid { grid-template-columns: 1fr; }
  .estimate-form { grid-template-columns: 1fr; }
  .section { padding: 62px 0; }
  .hero { padding: 70px 0 56px; }
  .footer-wrap { flex-direction: column; }
}
@media (max-width: 520px) {
  .container { width: min(100% - 28px, var(--max-width)); }
  .brand-text { font-size: 15px; }
  .brand-logo img { width: 150px; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
}

.hidden-field { display: none !important; }