* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: #f7f7f2;
  color: #26312b;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}
a {
  color: inherit;
}
#particles {
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: .18;
}
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(247, 247, 242, .92);
  border-bottom: 1px solid rgba(38, 49, 43, .12);
  backdrop-filter: blur(12px);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: auto;
  padding: 14px 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}
.logo-image {
  width: 54px;
  height: 54px;
  object-fit: contain;
}
.logo-text {
  display: grid;
  line-height: 1.35;
}
.logo-text strong {
  color: #20362d;
  font-size: 21px;
}
.logo-text span {
  color: #66746d;
  font-size: 12px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  color: #2d3d35;
  font-size: 15px;
  text-decoration: none;
}
.nav-links a:hover,
.nav-links a.active {
  color: #b36b2c;
}
.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(38, 49, 43, .18);
  border-radius: 8px;
  background: #fff;
  color: #20362d;
  cursor: pointer;
  font-size: 24px;
}
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  overflow: hidden;
  padding: 140px 24px 90px;
  text-align: center;
}
.hero-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #1d2621;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(110deg, rgba(22, 35, 29, .76), rgba(22, 35, 29, .42));
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  color: #fff;
}
.hero-content h1,
.page-hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.18;
  letter-spacing: 0;
}
.hero-content p {
  margin-top: 22px;
  color: rgba(255, 255, 255, .88);
  font-size: 22px;
}
.hero-buttons,
.center-action {
  margin-top: 34px;
}
.btn-primary,
.btn-outline,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  transition: .2s ease;
}
.btn-primary {
  background: #b36b2c;
  color: #fff;
}
.btn-primary:hover {
  background: #965821;
}
.btn-outline {
  margin-left: 12px;
  border: 1px solid rgba(255, 255, 255, .82);
  color: #fff;
}
.btn-outline:hover {
  background: #fff;
  color: #20362d;
}
.btn-secondary {
  border: 1px solid rgba(32, 54, 45, .22);
  color: #20362d;
}
.btn-secondary:hover {
  border-color: #b36b2c;
  color: #b36b2c;
}
.section {
  padding: 96px 24px;
}
.is-visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
}
.container {
  max-width: 1200px;
  margin: auto;
}
.muted,
.products {
  background: #eef2ec;
}
.page-hero {
  padding: 150px 24px 84px;
  background:
    linear-gradient(130deg, rgba(31, 57, 47, .94), rgba(35, 71, 83, .84)),
    url("LOGO.png") right 10% center / 300px no-repeat;
  color: #fff;
}
.page-hero p {
  max-width: 760px;
  margin-top: 18px;
  color: rgba(255, 255, 255, .84);
  font-size: 19px;
}
.eyebrow {
  margin-bottom: 12px;
  color: #b36b2c;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}
.center {
  text-align: center;
}
h2 {
  margin-bottom: 28px;
  color: #20362d;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.25;
}
h3 {
  color: #20362d;
  font-size: 23px;
}
p {
  color: #4f5d56;
}
.intro-left {
  margin-bottom: 18px;
  color: #33443b;
  font-size: 20px;
}
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  gap: 44px;
  align-items: start;
}
.feature-panel,
.contact-info,
.product-card,
.factory-grid div,
.values-grid div,
.product-detail {
  border: 1px solid rgba(32, 54, 45, .1);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 36px rgba(20, 34, 28, .08);
}
.feature-panel {
  padding: 34px;
}
.feature-panel ul,
.check-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding-left: 18px;
  color: #4f5d56;
}
.text-link {
  display: inline-block;
  margin-top: 22px;
  color: #b36b2c;
  font-weight: 800;
  text-decoration: none;
}
.text-link:hover {
  text-decoration: underline;
}
.strength {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: #d7ded5;
}
.strength-item {
  padding: 54px 24px;
  background: #fff;
  text-align: center;
}
.strength-item h3 {
  color: #b36b2c;
  font-size: 48px;
}
.product-grid,
.factory-grid,
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}
.product-card {
  padding: 36px 28px;
  text-align: center;
  transition: .2s ease;
}
.product-card:hover {
  transform: translateY(-6px);
}
.product-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 84px;
  height: 84px;
  margin-bottom: 20px;
  border-radius: 8px;
  background: #eef2ec;
}
.product-icon.large {
  width: 118px;
  height: 118px;
  margin: 0;
}
.product-icon img {
  max-width: 68%;
  max-height: 68%;
}
.product-card p {
  min-height: 88px;
  margin-top: 12px;
}
.product-card a {
  display: inline-block;
  margin-top: 18px;
  color: #b36b2c;
  font-weight: 800;
  text-decoration: none;
}
.factory-grid div,
.values-grid div {
  padding: 30px;
}
.factory-grid p,
.values-grid p {
  margin-top: 12px;
}
.contact-cta {
  background: #20362d;
}
.contact-cta h2,
.contact-cta p {
  color: #fff;
}
.cta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}
.solid {
  flex: 0 0 auto;
}
.product-detail-list {
  display: grid;
  gap: 28px;
}
.product-detail {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  padding: 34px;
  scroll-margin-top: 110px;
}
.process-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}
.process-list span {
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(32, 54, 45, .12);
  border-radius: 8px;
  background: #fff;
  color: #20362d;
  font-weight: 800;
  text-align: center;
}
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 38px;
  align-items: start;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-form input {
  width: 100%;
  min-height: 50px;
  padding: 13px 15px;
  border: 1px solid rgba(32, 54, 45, .2);
  border-radius: 8px;
  background: #fff;
  color: #20362d;
  font-size: 15px;
}
.form-group {
  display: grid;
  gap: 10px;
}
.form-group > label {
  color: #20362d;
  font-weight: 800;
}
.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.radio-group label {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 8px 14px;
  border: 1px solid rgba(32, 54, 45, .18);
  border-radius: 8px;
  background: #fff;
  color: #33443b;
  cursor: pointer;
  white-space: nowrap;
}
.radio-group input {
  width: auto;
  min-height: auto;
  flex: 0 0 auto;
  margin-right: 7px;
}
.contact-form button,
.back-top {
  border: none;
  border-radius: 8px;
  background: #b36b2c;
  color: #fff;
  cursor: pointer;
  font-weight: 800;
}
.contact-form button {
  min-height: 50px;
  font-size: 16px;
}
.contact-info {
  padding: 34px;
}
.contact-info h2 {
  margin-bottom: 18px;
}
.contact-info p + p {
  margin-top: 14px;
}
.contact-info a {
  color: #b36b2c;
  text-decoration: none;
}
footer {
  padding: 26px 20px;
  background: #172720;
  text-align: center;
}
footer p {
  color: rgba(255, 255, 255, .82);
}

/* ===== 备案信息 ===== */
.footer-beian {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .6);
}
.footer-beian a {
  color: rgba(255, 255, 255, .6);
  text-decoration: none;
  margin: 0 10px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color .3s;
}
.footer-beian a:hover {
  color: rgba(255, 255, 255, .9);
}
.footer-beian img {
  width: 14px;
  height: 14px;
  vertical-align: middle;
}
@media (max-width: 768px) {
  .footer-beian {
    font-size: 12px;
  }
  .footer-beian a {
    margin: 0 6px;
  }
}

.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  width: 46px;
  height: 46px;
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}
.back-top.show {
  opacity: 1;
  pointer-events: auto;
}
.mobile-call {
  display: none;
  position: fixed;
  right: 18px;
  bottom: 24px;
  z-index: 1001;
  min-width: 112px;
  min-height: 44px;
  padding: 9px 16px;
  border-radius: 8px;
  background: #b36b2c;
  color: #fff;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(0, 0, 0, .18);
}
@media (max-width: 900px) {
  nav {
    padding: 12px 18px;
  }
  .mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .nav-links {
    position: absolute;
    top: 79px;
    left: 0;
    display: none;
    width: 100%;
    padding: 18px;
    background: #f7f7f2;
    border-bottom: 1px solid rgba(32, 54, 45, .12);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-links a {
    display: block;
    padding: 12px 6px;
    text-align: center;
  }
  .logo-text span {
    display: none;
  }
  .split,
  .contact-layout,
  .product-detail {
    grid-template-columns: 1fr;
  }
  .product-grid,
  .factory-grid,
  .values-grid,
  .strength {
    grid-template-columns: 1fr;
  }
  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .cta-row {
    align-items: flex-start;
    flex-direction: column;
  }
  .mobile-call {
    display: block;
  }
  .back-top {
    bottom: 82px;
  }
}
@media (max-width: 560px) {
  .hero {
    min-height: 92vh;
    padding: 120px 18px 76px;
  }
  .hero-content p,
  .page-hero p {
    font-size: 16px;
  }
  .btn-primary,
  .btn-outline,
  .btn-secondary {
    width: 100%;
  }
  .btn-outline {
    margin: 12px 0 0;
  }
  .section {
    padding: 70px 18px;
  }
  .page-hero {
    padding: 124px 18px 64px;
    background:
      linear-gradient(130deg, rgba(31, 57, 47, .96), rgba(35, 71, 83, .9)),
      url("LOGO.png") right -40px bottom 20px / 220px no-repeat;
  }
  .feature-panel,
  .contact-info,
  .product-card,
  .factory-grid div,
  .values-grid div,
  .product-detail {
    padding: 24px;
  }
  .radio-group {
    flex-direction: column;
  }
  .process-list {
    grid-template-columns: 1fr;
  }
}