:root {
  --emerald: #0fa968;
  --emerald-deep: #066a47;
  --emerald-dark: #0b3a36;
  --gold: #e3b04c;
  --gold-light: #f2cd7e;
  --gold-deep: #a87c24;
  --ivory: #fbf8f1;
  --ink: #10201a;
  --muted: #5d726a;
  --line: #e4dcc8;
  --white: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--ivory);
  line-height: 1.65;
  font-size: 16px;
}
a { color: var(--emerald); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* 统一字体：全部使用同一无衬线字体，靠字号分级建立层次 */

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 88px;
}
.logo { display: flex; align-items: center; }
.logo-img { height: 62px; width: auto; display: block; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--ink); font-weight: 500; font-size: 14.5px; }
.nav-links a:hover { color: var(--emerald); text-decoration: none; }
.lang { display: flex; gap: 7px; align-items: center; }
.lang a { font-size: 13px; font-weight: 700; color: var(--muted); }
.lang a.active { color: var(--emerald); }
.lang span { color: var(--line); }
.nav-cta {
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  color: #2a1d06 !important;
  padding: 10px 20px; border-radius: 7px; font-weight: 700;
  box-shadow: 0 6px 16px rgba(217,164,65,.35);
}
.nav-cta:hover { box-shadow: 0 8px 20px rgba(217,164,65,.5); text-decoration: none; }

/* Hero — deep emerald with golden glow */
.hero {
  background:
    radial-gradient(1100px 480px at 78% -10%, rgba(227,176,76,.34), transparent 60%),
    radial-gradient(900px 500px at 8% 110%, rgba(15,169,104,.5), transparent 60%),
    linear-gradient(150deg, #062830 0%, #0a4a3c 45%, #0e7a58 100%);
  color: var(--white);
  padding: 44px 0 40px;
}
.hero h1 {
  font-size: 25px; line-height: 1.25; max-width: 700px; font-weight: 700;
  text-shadow: 0 2px 18px rgba(0,0,0,.25);
}
.hero h1 em { font-style: normal; color: var(--gold-light); }
.hero p {
  font-size: 15.5px; margin: 10px 0 18px; max-width: 620px;
  color: #d7ece2;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 22px; border-radius: 7px;
  font-weight: 700; font-size: 14px; letter-spacing: .3px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--gold-light), var(--gold-deep));
  color: #241a05; box-shadow: 0 10px 26px rgba(217,164,65,.4);
}
.btn-primary:hover { transform: translateY(-1px); text-decoration: none; box-shadow: 0 12px 30px rgba(217,164,65,.55); }
.btn-ghost { border: 1.5px solid rgba(255,255,255,.75); color: var(--white); }
.btn-ghost:hover { background: rgba(255,255,255,.12); text-decoration: none; }

/* Hero scene slider */
.slider { position: relative; height: 460px; overflow: hidden; }
.slide {
  position: absolute; inset: 0; opacity: 0;
  background-size: cover; background-position: center;
  animation: crossfade 15s infinite;
}
.slide:nth-child(1) { animation-delay: 0s; }
.slide:nth-child(2) { animation-delay: 5s; }
.slide:nth-child(3) { animation-delay: 10s; }
@keyframes crossfade {
  0% { opacity: 0; }
  8% { opacity: 1; }
  28% { opacity: 1; }
  36% { opacity: 0; }
  100% { opacity: 0; }
}
.slide-caption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 34px 24px 26px;
  background: linear-gradient(transparent, rgba(4,38,30,.78));
  color: var(--white);
}
.slide-caption h3 { font-size: 22px; margin-bottom: 4px; }
.slide-caption p { font-size: 15px; color: #d7ece2; }

/* Sections */
.section { padding: 72px 0; }
.section.alt { background: var(--white); }
.section h2 { font-size: 27px; margin-bottom: 10px; font-weight: 700; color: var(--emerald-dark); }
.section .lead { color: var(--muted); max-width: 640px; margin-bottom: 40px; font-size: 17px; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12.5px; font-weight: 800; letter-spacing: 3px;
  text-transform: uppercase; color: var(--gold-deep); margin-bottom: 10px;
}
.kicker::before { content: ""; width: 34px; height: 2px; background: var(--gold); }

/* Product cards */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 28px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: 14px;
  overflow: hidden; transition: transform .18s ease, box-shadow .18s ease;
  box-shadow: 0 4px 14px rgba(6,63,46,.06);
}
.card:hover { transform: translateY(-5px); box-shadow: 0 18px 40px rgba(6,63,46,.16); }
.card img { width: 100%; height: 230px; object-fit: cover; display: block; }
.card-body { padding: 22px 24px 26px; }
.card-body h3 { font-size: 19px; margin-bottom: 8px; color: var(--emerald-dark); }
.card-body p { color: var(--muted); font-size: 15px; }
.card-body .tag {
  display: inline-block; margin-top: 14px; font-size: 12.5px; font-weight: 700;
  color: var(--gold-deep); border: 1px solid var(--gold); background: #fdf7e8;
  border-radius: 20px; padding: 4px 14px; letter-spacing: .5px;
}

/* Why us */
.why { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 22px; }
.why-item {
  background: var(--white); border: 1px solid var(--line); border-radius: 12px; padding: 24px;
  box-shadow: 0 3px 10px rgba(6,63,46,.05);
}
.why-item .num {
  font-size: 13px; font-weight: 800; color: var(--gold-deep); letter-spacing: 2px;
  display: inline-flex; align-items: center; gap: 8px;
}
.why-item .num::after { content: ""; width: 22px; height: 1.5px; background: var(--gold); }
.why-item h4 { margin: 10px 0 8px; font-size: 17px; color: var(--emerald-dark); }
.why-item p { color: var(--muted); font-size: 15px; }

/* Cert strip */
.certs {
  background: linear-gradient(120deg, #f4ecd9, #faf6ed);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 30px 0;
}
.certs-inner { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; }
.certs-inner span {
  border: 1px solid var(--gold); border-radius: 9px; padding: 10px 22px;
  font-weight: 800; color: var(--emerald-deep); background: var(--white);
  letter-spacing: .5px; box-shadow: 0 3px 8px rgba(176,125,36,.12);
}

/* Numbers */
.numbers {
  background:
    radial-gradient(800px 340px at 85% 0%, rgba(227,176,76,.26), transparent 60%),
    linear-gradient(150deg, #062830, #0a4a3c);
  color: var(--white); padding: 58px 0;
}
.numbers-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 24px; text-align: center; }
.numbers-inner .big { font-size: 38px; font-weight: 700; color: var(--gold-light); }
.numbers-inner .label { font-size: 14px; color: #cfe7dc; letter-spacing: 1px; text-transform: uppercase; }

/* Quote form */
.form-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 14px;
  padding: 32px; max-width: 680px; box-shadow: 0 8px 24px rgba(6,63,46,.08);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid label { display: block; font-size: 13.5px; font-weight: 700; margin-bottom: 5px; color: var(--emerald-dark); }
.form-grid input, .form-grid select, .form-grid textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px;
  font-size: 14.5px; font-family: inherit; background: var(--ivory);
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: none; border-color: var(--emerald); box-shadow: 0 0 0 3px rgba(14,138,95,.15);
}
.form-grid .full { grid-column: 1 / -1; }
textarea { resize: vertical; min-height: 90px; }
.btn-submit {
  margin-top: 20px; border: 0; cursor: pointer;
  background: linear-gradient(135deg, var(--gold-light), var(--gold-deep)); color: #241a05;
  padding: 14px 32px; border-radius: 8px; font-size: 15px; font-weight: 800;
  box-shadow: 0 8px 20px rgba(217,164,65,.35);
}
.btn-submit:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(217,164,65,.5); }

/* Footer */
.footer {
  background:
    radial-gradient(700px 260px at 90% -20%, rgba(227,176,76,.16), transparent 60%),
    #082a2b;
  color: #b9d4c8; padding: 46px 0 30px;
}
.footer-cols { display: flex; flex-wrap: wrap; gap: 48px; justify-content: space-between; }
.footer-col a { color: #b9d4c8; display: block; margin-bottom: 8px; font-size: 14.5px; }
.footer-col a:hover { color: var(--white); }
.footer-col span { display: block; margin-bottom: 8px; font-size: 14.5px; color: #b9d4c8; }
.footer .copy { margin-top: 32px; font-size: 13px; text-align: center; color: #6f9a8b; border-top: 1px solid rgba(185,212,200,.15); padding-top: 20px; }

/* Page hero (inner pages) */
.page-hero {
  background:
    radial-gradient(900px 380px at 82% -10%, rgba(227,176,76,.3), transparent 60%),
    linear-gradient(150deg, #062830, #0a4a3c 55%, #0e7a58);
  color: var(--white); padding: 66px 0 58px;
}
.page-hero h1 { font-size: 26px; font-weight: 700; }
.page-hero p { color: #d7ece2; margin-top: 10px; max-width: 640px; font-size: 16px; }

/* Products page */
.prod-block { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; padding: 44px 0; }
.prod-block:nth-child(even) { direction: rtl; }
.prod-block > * { direction: ltr; }
.prod-block img { width: 100%; border-radius: 14px; max-height: 360px; object-fit: cover; box-shadow: 0 14px 34px rgba(6,63,46,.18); }
.img-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 14px; }
.img-row img { max-height: 150px; box-shadow: 0 8px 20px rgba(6,63,46,.14); }
.prod-block h3 { font-size: 22px; margin-bottom: 10px; color: var(--emerald-dark); }
.prod-block p { color: var(--muted); margin-bottom: 14px; }
.specs { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.specs li {
  background: #f6efdc; border: 1px solid var(--gold); border-radius: 20px;
  padding: 6px 15px; font-size: 13px; color: var(--emerald-deep); font-weight: 600;
}
.prod-block a { font-weight: 700; color: var(--emerald); }

/* About */
.about-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.doc-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 20px; }
.doc-chip {
  border: 1px solid var(--gold); color: var(--emerald-deep); background: var(--white);
  border-radius: 9px; padding: 11px 18px; font-weight: 800; font-size: 14px;
  box-shadow: 0 3px 8px rgba(176,125,36,.12);
}

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; }
.contact-info p { margin-bottom: 14px; }
.contact-info .k { font-weight: 800; color: var(--emerald); letter-spacing: .5px; }

@media (max-width: 760px) {
  .hero h1 { font-size: 32px; }
  .nav-links { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .prod-block { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}