/* ============================================
   CANVASSHED — 全站样式
   主色系: 深绿 + 木色 + 米白 (美国乡村建筑风格)
   ============================================ */

:root {
  --green-900: #1e3a2f;
  --green-700: #2d5443;
  --green-500: #3f7258;
  --wood-600: #a0703c;
  --wood-500: #b98a52;
  --cream: #faf6ef;
  --cream-dark: #f0e9dc;
  --ink: #22282a;
  --ink-soft: #4d5a57;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(30, 58, 47, 0.10);
  --shadow-lg: 0 8px 28px rgba(30, 58, 47, 0.16);
  --maxw: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: var(--cream);
  line-height: 1.65;
}

h1, h2, h3, h4, .btn, nav, .badge, .price, .spec-table, footer {
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

img, svg { max-width: 100%; display: block; }

a { color: var(--green-700); }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  background: var(--green-900);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  max-width: var(--maxw);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}

.logo svg { width: 34px; height: 34px; }

.main-nav { display: flex; gap: 26px; align-items: center; }

.main-nav a {
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

.main-nav a:hover, .main-nav a.active { color: var(--wood-500); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.6rem;
  cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn-primary { background: var(--wood-600); color: var(--white); }
.btn-outline { border-color: var(--white); color: var(--white); background: transparent; }
.btn-outline-dark { border-color: var(--green-700); color: var(--green-700); background: transparent; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(rgba(30, 58, 47, 0.82), rgba(30, 58, 47, 0.82)),
              var(--green-700);
  color: var(--white);
  text-align: center;
  padding: 90px 20px 100px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero p.sub {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  max-width: 640px;
  margin: 0 auto 34px;
}

.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- Sections ---------- */
section { padding: 70px 0; }

.section-title {
  text-align: center;
  font-size: 2rem;
  color: var(--green-900);
  margin-bottom: 10px;
}

.section-sub {
  text-align: center;
  color: var(--ink-soft);
  max-width: 620px;
  margin: 0 auto 48px;
}

.alt-bg { background: var(--cream-dark); }

/* ---------- Cards ---------- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.card-img { aspect-ratio: 4 / 3; background: var(--cream-dark); }
.card-img svg, .card-img img { width: 100%; height: 100%; object-fit: cover; }

.card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }

.card-body h3 { color: var(--green-900); font-size: 1.25rem; margin-bottom: 6px; }

.card-body p { color: var(--ink-soft); font-size: 0.95rem; flex: 1; }

.price {
  color: var(--wood-600);
  font-weight: 700;
  font-size: 1.15rem;
  margin: 12px 0;
}

.price small { color: var(--ink-soft); font-weight: 400; font-size: 0.8rem; }

/* ---------- Feature list ---------- */
.feature {
  text-align: center;
  padding: 10px;
}

.feature .icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px;
  background: var(--green-700);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
}

.feature h3 { color: var(--green-900); font-size: 1.1rem; margin-bottom: 8px; }
.feature p { color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- Steps ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.step {
  background: var(--white);
  border-radius: var(--radius);
  padding: 26px 22px;
  box-shadow: var(--shadow);
  position: relative;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--wood-600);
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 14px;
  font-family: 'Helvetica Neue', Arial, sans-serif;
}

.step h3 { color: var(--green-900); font-size: 1.05rem; margin-bottom: 8px; }
.step p { color: var(--ink-soft); font-size: 0.92rem; }

/* ---------- Spec table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.95rem;
}

.spec-table th, .spec-table td {
  padding: 13px 18px;
  text-align: left;
  border-bottom: 1px solid var(--cream-dark);
}

.spec-table th { background: var(--green-900); color: var(--white); font-weight: 600; }

.spec-table tr:last-child td { border-bottom: none; }

.spec-table tr:nth-child(even) { background: var(--cream); }

/* ---------- Detail page ---------- */
.detail-hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 44px; align-items: start; }

.detail-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--cream-dark);
}

.detail-info h1 { color: var(--green-900); font-size: 2.2rem; margin-bottom: 12px; }

.detail-info .price { font-size: 1.6rem; }

.badge {
  display: inline-block;
  background: var(--green-500);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.check-list { list-style: none; margin: 20px 0; }

.check-list li {
  padding-left: 30px;
  position: relative;
  margin-bottom: 10px;
  color: var(--ink-soft);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green-500);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ---------- Forms ---------- */
.form-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 38px;
  max-width: 720px;
  margin: 0 auto;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--green-900);
  margin-bottom: 6px;
}

.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid #d5cfc2;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: var(--cream);
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--green-500);
  background: var(--white);
}

.form-note { font-size: 0.85rem; color: var(--ink-soft); margin-top: 14px; }

/* ---------- Notice / deposit box ---------- */
.notice {
  background: #fdf3e3;
  border-left: 4px solid var(--wood-600);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 20px 24px;
  margin: 26px 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.notice strong { color: var(--ink); }

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 14px;
  overflow: hidden;
}

.faq-item summary {
  padding: 18px 22px;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  font-weight: 600;
  color: var(--green-900);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 46px;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  color: var(--wood-600);
}

.faq-item[open] summary::after { content: "−"; }

.faq-item .faq-body { padding: 0 22px 20px; color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--green-900);
  color: var(--white);
  text-align: center;
  padding: 64px 20px;
}

.cta-band h2 { font-size: 1.9rem; margin-bottom: 12px; }
.cta-band p { color: rgba(255, 255, 255, 0.8); margin-bottom: 28px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.75);
  padding: 54px 0 30px;
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 36px;
  margin-bottom: 36px;
}

.site-footer h4 { color: var(--white); margin-bottom: 14px; font-size: 1rem; }

.site-footer a { color: rgba(255, 255, 255, 0.75); text-decoration: none; display: block; margin-bottom: 8px; }

.site-footer a:hover { color: var(--wood-500); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 22px;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  background: var(--green-700);
  color: var(--white);
  text-align: center;
  padding: 56px 20px;
}

.page-hero h1 { font-size: 2.3rem; margin-bottom: 10px; }
.page-hero p { color: rgba(255, 255, 255, 0.82); max-width: 600px; margin: 0 auto; }

/* ---------- Formspree AJAX 提示 ---------- */
.fs-success, .fs-error { margin-bottom: 20px; border-radius: 0 var(--radius) var(--radius) 0; padding: 16px 20px; font-weight: 600; }
.fs-success { background: #e8f3e8; border-left: 4px solid var(--green-500); color: var(--green-900); }
.fs-error { background: #fdeaea; border-left: 4px solid #a03c3c; color: #7a2e2e; }
.fs-success:empty, .fs-error:empty { display: none; }

/* ---------- Design gallery ---------- */
.design-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.design-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.design-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.design-card img { width: 100%; height: 240px; object-fit: cover; }

.design-card .card-body { padding: 20px 22px; }

@media (max-width: 640px) {
  .design-grid { grid-template-columns: 1fr; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-3, .grid-4, .steps { grid-template-columns: repeat(2, 1fr); }
  .detail-hero { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .grid-3, .grid-4, .steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--green-900);
    flex-direction: column;
    padding: 18px 20px;
    gap: 16px;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
}