/* ============================================================
   SULING EXPRESS ELEVATOR (SUZHOU) CO.,LTD.
   Site web — elevator.xiaozhibg.cn
   Feuille de style principale (responsive)
   ============================================================ */

:root {
  --primary: #0b2340;
  --primary-dark: #071830;
  --primary-light: #14395f;
  --accent: #c9a45c;
  --accent-dark: #a9863f;
  --text: #2b3440;
  --text-light: #6b7684;
  --bg-light: #f5f7fa;
  --white: #ffffff;
  --border: #e3e8ee;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(11, 35, 64, 0.08);
  --shadow-hover: 0 16px 40px rgba(11, 35, 64, 0.14);
  --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }

ul { list-style: none; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--primary-dark); }
.btn-primary:hover { background: var(--accent-dark); color: var(--white); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(201, 164, 92, 0.4); }
.btn-outline { border-color: rgba(255,255,255,0.8); color: var(--white); background: transparent; }
.btn-outline:hover { background: var(--white); color: var(--primary); }
.btn-dark { background: var(--primary); color: var(--white); }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); }

/* ---------- En-tête ---------- */
.topbar {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.75);
  font-size: 13px;
  padding: 8px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 6px; }
.topbar a { color: var(--accent); }

header.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 14px rgba(11, 35, 64, 0.08);
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; max-width: 1180px; margin: 0 auto; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 48px; height: 48px; border-radius: 6px; object-fit: cover; }
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text .name { font-weight: 700; font-size: 17px; color: var(--primary); letter-spacing: 0.5px; }
.logo-text .tagline { font-size: 11px; color: var(--text-light); text-transform: uppercase; letter-spacing: 1.5px; }

nav.main-nav ul { display: flex; gap: 6px; align-items: center; }
nav.main-nav a {
  display: block;
  padding: 10px 16px;
  font-weight: 500;
  font-size: 15px;
  color: var(--primary);
  border-radius: 6px;
  position: relative;
}
nav.main-nav a:hover, nav.main-nav a.active { color: var(--accent-dark); }
nav.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-cta { margin-left: 12px; }
.nav-cta .btn { padding: 10px 24px; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
}
.menu-toggle span { width: 26px; height: 3px; background: var(--primary); border-radius: 2px; transition: var(--transition); }

/* ---------- Bannière héro ---------- */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background: linear-gradient(105deg, rgba(7, 24, 48, 0.88) 0%, rgba(11, 35, 64, 0.55) 55%, rgba(11, 35, 64, 0.25) 100%), url("/img/banner.jpg") center/cover no-repeat;
  color: var(--white);
}
.hero-content { max-width: 640px; padding: 90px 0; }
.hero .kicker {
  display: inline-block;
  background: rgba(201, 164, 92, 0.18);
  border: 1px solid rgba(201, 164, 92, 0.55);
  color: #e8cf9e;
  padding: 6px 18px;
  border-radius: 30px;
  font-size: 13px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero h1 { font-size: 46px; line-height: 1.18; font-weight: 700; margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead { font-size: 18px; color: rgba(255,255,255,0.88); margin-bottom: 34px; max-width: 560px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Bandeau statistiques ---------- */
.stats-bar { background: var(--primary); color: var(--white); padding: 38px 0; }
.stats-bar .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat .num { font-size: 34px; font-weight: 700; color: var(--accent); }
.stat .label { font-size: 14px; color: rgba(255,255,255,0.8); margin-top: 4px; }

/* ---------- Sections ---------- */
section { padding: 76px 0; }
.section-alt { background: var(--bg-light); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-head .eyebrow { color: var(--accent-dark); font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 2.5px; margin-bottom: 10px; }
.section-head h2 { font-size: 34px; color: var(--primary); line-height: 1.25; margin-bottom: 14px; }
.section-head p { color: var(--text-light); font-size: 16.5px; }

/* Grille de cartes */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; align-items: center; }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
.card .thumb { aspect-ratio: 4 / 3; overflow: hidden; background: var(--bg-light); }
.card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .thumb img { transform: scale(1.06); }
.card .body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.card h3 { font-size: 19px; color: var(--primary); margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: 14.5px; flex: 1; }
.card .more { margin-top: 16px; font-weight: 600; color: var(--accent-dark); font-size: 14px; }

/* Liste à puces élégante */
.feature-list li { position: relative; padding-left: 30px; margin-bottom: 12px; color: var(--text); }
.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 1px;
  width: 20px; height: 20px;
  background: rgba(201, 164, 92, 0.15);
  color: var(--accent-dark);
  border-radius: 50%;
  font-size: 12px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}

/* ---------- Bloc CTA ---------- */
.cta-band {
  background: linear-gradient(110deg, var(--primary-dark), var(--primary-light));
  color: var(--white);
  padding: 64px 0;
  text-align: center;
}
.cta-band h2 { font-size: 30px; margin-bottom: 12px; }
.cta-band h2 em { font-style: normal; color: var(--accent); }
.cta-band p { color: rgba(255,255,255,0.85); max-width: 620px; margin: 0 auto 30px; }
.cta-band .btn-primary { font-size: 16px; padding: 15px 42px; }

/* ---------- Page hero (interne) ---------- */
.page-hero {
  background: linear-gradient(105deg, rgba(7, 24, 48, 0.92), rgba(20, 57, 95, 0.72)), url("/img/banner.jpg") center/cover no-repeat;
  color: var(--white);
  padding: 90px 0 70px;
  text-align: center;
}
.page-hero h1 { font-size: 40px; margin-bottom: 12px; }
.page-hero p { color: rgba(255,255,255,0.85); max-width: 680px; margin: 0 auto; }

.breadcrumb {
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--text-light);
  padding: 12px 0;
}
.breadcrumb .container { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--accent-dark); }
.breadcrumb span.sep { margin: 0 6px; color: #b8c1cb; }

/* ---------- Contenu texte ---------- */
.prose { max-width: 860px; margin: 0 auto; }
.prose h2 { font-size: 26px; color: var(--primary); margin: 36px 0 16px; }
.prose h3 { font-size: 20px; color: var(--primary); margin: 28px 0 12px; }
.prose p { margin-bottom: 16px; color: var(--text); }
.prose ul { margin: 0 0 18px; }

/* ---------- Produit détail ---------- */
.product-detail { display: grid; grid-template-columns: 1.05fr 1fr; gap: 46px; align-items: start; }
.product-detail .image-box { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: var(--bg-light); }
.product-detail .image-box img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.product-detail h1 { font-size: 32px; color: var(--primary); line-height: 1.25; margin-bottom: 6px; }
.product-detail .subtitle { color: var(--accent-dark); font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 18px; }
.product-detail .desc { color: var(--text-light); margin-bottom: 22px; }
.spec-table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14.5px; }
.spec-table th, .spec-table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.spec-table th { background: var(--bg-light); color: var(--primary); width: 42%; font-weight: 600; }

.related { background: var(--bg-light); }
.product-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 44px; padding-top: 26px; border-top: 1px solid var(--border); }
.product-nav a { font-size: 14.5px; font-weight: 600; color: var(--primary); }
.product-nav a:hover { color: var(--accent-dark); }

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  font-size: 16.5px;
  color: var(--primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--accent-dark); font-weight: 400; flex-shrink: 0; transition: var(--transition); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 24px 22px; color: var(--text-light); }

/* ---------- Formulaire de contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.4fr; gap: 44px; align-items: start; }
.contact-info-card {
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  padding: 36px;
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 20px; color: var(--accent); }
.contact-info-card ul li { display: flex; gap: 14px; margin-bottom: 18px; font-size: 15px; color: rgba(255,255,255,0.9); }
.contact-info-card .ico { color: var(--accent); flex-shrink: 0; margin-top: 2px; }
.form-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 38px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-weight: 600; font-size: 14px; color: var(--primary); margin-bottom: 7px; }
.form-group label .req { color: #c0392b; }
.form-group input, .form-group textarea, .form-group select {
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text);
  background: var(--bg-light);
  transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(201, 164, 92, 0.15);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.hp-field { position: absolute; left: -9999px; top: -9999px; height: 0; overflow: hidden; }
.form-note { font-size: 13px; color: var(--text-light); margin-top: 14px; }
.form-success {
  display: none;
  background: #e8f7ee;
  border: 1.5px solid #34a765;
  color: #1d6e40;
  border-radius: 8px;
  padding: 18px 22px;
  margin-bottom: 22px;
  font-weight: 500;
}
.form-success.show { display: block; animation: fadeIn 0.4s ease; }
.form-error {
  display: none;
  background: #fdeceb;
  border: 1.5px solid #e05c52;
  color: #96271f;
  border-radius: 8px;
  padding: 14px 20px;
  margin-bottom: 22px;
}
.form-error.show { display: block; }
.btn-submit { width: 100%; font-size: 16px; padding: 15px; background: var(--primary); color: var(--white); border: none; }
.btn-submit:hover { background: var(--primary-light); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- Pied de page ---------- */
footer.site-footer { background: var(--primary-dark); color: rgba(255,255,255,0.72); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; padding-bottom: 44px; }
.footer-grid h4 { color: var(--white); font-size: 16px; margin-bottom: 18px; }
.footer-grid ul li { margin-bottom: 10px; font-size: 14.5px; }
.footer-grid a { color: rgba(255,255,255,0.72); }
.footer-grid a:hover { color: var(--accent); }
.footer-about p { font-size: 14.5px; margin-bottom: 14px; }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.footer-logo img { width: 44px; height: 44px; border-radius: 6px; }
.footer-logo span { color: var(--white); font-weight: 700; font-size: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 20px 0; font-size: 13.5px; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- Accessibilité ---------- */
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 10px; top: 10px; background: var(--accent); color: var(--primary-dark); padding: 8px 16px; z-index: 2000; border-radius: 6px; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  nav.main-nav {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--white);
    box-shadow: 0 14px 30px rgba(11,35,64,0.14);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  nav.main-nav.open { max-height: 480px; }
  nav.main-nav ul { flex-direction: column; align-items: stretch; padding: 14px 20px 22px; gap: 2px; }
  nav.main-nav .nav-cta { margin: 12px 0 0; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 32px; }
  .hero-content { padding: 60px 0; }
  .stats-bar .container { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .section-head h2 { font-size: 27px; }
  .page-hero h1 { font-size: 30px; }
  section { padding: 56px 0; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .stats-bar .container { grid-template-columns: 1fr 1fr; }
  .stat .num { font-size: 26px; }
  .hero h1 { font-size: 27px; }
  .footer-grid { grid-template-columns: 1fr; }
}