/* index.html */
/* ===== 全局重置与基础 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "微软雅黑", sans-serif;
  color: #333;
  line-height: 1.6;
  background: #fff;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: #666;
  font-size: 1rem;
  margin-bottom: 48px;
}
.section-sub::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: #e8341a;
  margin: 12px auto 0;
}
.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-primary {
  background: #e8341a;
  color: #fff;
  border: 2px solid #e8341a;
}
.btn-primary:hover { background: #c42a14; border-color: #c42a14; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,52,26,0.3); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}
.btn-outline:hover { background: #fff; color: #e8341a; }

/* ===== 顶部公告条 ===== */
.top-bar {
  background: #1a1a2e;
  color: #ccc;
  font-size: 0.82rem;
  padding: 8px 0;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar a { color: #ccc; }
.top-bar a:hover { color: #e8341a; }

/* ===== 导航 ===== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 8px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  background: #e8341a;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  font-weight: 900;
  flex-shrink: 0;
}
.logo-text { line-height: 1.3; }
.logo-text .name { font-size: 1rem; font-weight: 700; color: #1a1a2e; white-space: nowrap; }
.logo-text .eng { font-size: 0.65rem; color: #888; letter-spacing: 0.5px; white-space: nowrap; }
.nav-links {
  display: flex;
  list-style: none;
  gap: 0;
  flex-wrap: nowrap;
  flex: 1;
  justify-content: center;
}
.nav-links li { position: relative; }
.nav-links a {
  display: block;
  padding: 6px 10px;
  font-size: 0.88rem;
  color: #333;
  border-radius: 4px;
  transition: color 0.2s;
  white-space: nowrap;
}
.nav-links a:hover { color: #e8341a; }
.nav-links .dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.25s;
  z-index: 100;
}
.nav-links li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-links .dropdown a { padding: 9px 16px; font-size: 0.88rem; border-radius: 0; }
.nav-links .dropdown a:hover { background: #fff5f3; color: #e8341a; }
.nav-phone {
  font-weight: 700;
  color: #e8341a;
  font-size: 0.92rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-phone span { font-size: 0.75rem; color: #888; font-weight: 400; display: block; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; flex-shrink: 0; }
.hamburger span { width: 24px; height: 2px; background: #333; display: block; transition: all 0.3s; }

/* ===== 英雄区 Hero ===== */
.hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
  color: #fff;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(232,52,26,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232,52,26,0.2);
  border: 1px solid rgba(232,52,26,0.4);
  color: #ff8070;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
}
.hero h1 em {
  color: #e8341a;
  font-style: normal;
}
.hero p {
  color: rgba(255,255,255,0.75);
  font-size: 1.05rem;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.stat-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 12px;
  padding: 24px 20px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: transform 0.3s;
}
.stat-card:hover { transform: translateY(-4px); background: rgba(255,255,255,0.1); }
.stat-card .num {
  font-size: 2.4rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}
.stat-card .num span { font-size: 1rem; color: #e8341a; }
.stat-card .label { font-size: 0.82rem; color: rgba(255,255,255,0.6); margin-top: 6px; }

/* ===== 资质条带 ===== */
.cert-strip {
  background: #f8f8f8;
  border-top: 3px solid #e8341a;
  padding: 20px 0;
}
.cert-strip .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}
.cert-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: #555;
  font-weight: 500;
}
.cert-item .icon { font-size: 1.3rem; }

/* ===== 产品区 ===== */
.products { background: #fff; }
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.product-card {
  border: 1px solid #eee;
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s;
}
.product-card:hover {
  border-color: #e8341a;
  box-shadow: 0 8px 32px rgba(232,52,26,0.12);
  transform: translateY(-4px);
}
.product-img {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  overflow: hidden;
}
.product-img img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
  position: relative;
  overflow: hidden;
}
.product-card:nth-child(1) .product-img { background: linear-gradient(135deg, #fff5f3, #ffe0db); }
.product-card:nth-child(2) .product-img { background: linear-gradient(135deg, #f0f7ff, #dbeeff); }
.product-card:nth-child(3) .product-img { background: linear-gradient(135deg, #f5fff0, #d9f5ce); }
.product-card:nth-child(4) .product-img { background: linear-gradient(135deg, #fffbf0, #ffefc8); }
.product-card:nth-child(5) .product-img { background: linear-gradient(135deg, #f8f0ff, #e8d4ff); }
.product-card:nth-child(6) .product-img { background: linear-gradient(135deg, #f0fffd, #c8f5ee); }
.product-body { padding: 20px; }
.product-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: #1a1a2e; }
.product-body p { font-size: 0.88rem; color: #666; line-height: 1.6; }
.product-tag {
  display: inline-block;
  background: #fff5f3;
  color: #e8341a;
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 10px;
  margin-top: 10px;
}

/* ===== 优势区 ===== */
.advantages { background: #f9f9f9; }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  background: #fff;
  border-radius: 12px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.05);
  transition: all 0.3s;
}
.adv-card:hover { box-shadow: 0 8px 30px rgba(0,0,0,0.1); transform: translateY(-4px); }
.adv-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, #fff5f3, #ffe0db);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 16px;
}
.adv-card h3 { font-size: 1rem; font-weight: 700; color: #1a1a2e; margin-bottom: 8px; }
.adv-card p { font-size: 0.85rem; color: #666; line-height: 1.6; }

/* ===== 生产能力 ===== */
.capability { background: #1a1a2e; color: #fff; }
.capability .section-title { color: #fff; }
.capability .section-sub { color: rgba(255,255,255,0.6); }
.capability .section-sub::after { background: #e8341a; }
.cap-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.cap-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #fff;
}
.cap-text p {
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: 24px;
}
.cap-list { list-style: none; }
.cap-list li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.85);
  font-size: 0.95rem;
}
.cap-list li::before {
  content: '✓';
  width: 22px;
  height: 22px;
  background: #e8341a;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  color: #fff;
  font-weight: 700;
}
.cap-numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cap-num-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}
.cap-num-card .big { font-size: 2.2rem; font-weight: 800; color: #e8341a; line-height: 1.1; }
.cap-num-card .unit { font-size: 0.9rem; color: rgba(255,255,255,0.5); }
.cap-num-card .desc { font-size: 0.82rem; color: rgba(255,255,255,0.7); margin-top: 6px; }

/* ===== 服务流程 ===== */
.process { background: #fff; }
.process-steps {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 0;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  min-width: 120px;
  max-width: 180px;
  text-align: center;
  position: relative;
}
.step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -12px;
  top: 22px;
  font-size: 1.5rem;
  color: #e8341a;
}
.step-num {
  width: 52px;
  height: 52px;
  background: #e8341a;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 auto 12px;
}
.step h4 { font-size: 0.95rem; font-weight: 700; color: #1a1a2e; margin-bottom: 6px; }
.step p { font-size: 0.8rem; color: #888; line-height: 1.4; }

/* ===== 客户案例/服务区域 ===== */
.service-area { background: #f9f9f9; }
.area-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.area-card {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  border-left: 4px solid #e8341a;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.area-card h3 { font-size: 1rem; font-weight: 700; color: #1a1a2e; margin-bottom: 8px; }
.area-card p { font-size: 0.85rem; color: #666; }

/* ===== 区域服务链接 ===== */
.region-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1a1a2e;
  margin: 0 0 16px 0;
  padding-left: 12px;
  border-left: 4px solid #e8341a;
}
.region-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 0;
  padding-top: 0;
  border-top: none;
  margin-bottom: 24px;
}
.region-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  background: #fff;
  border-radius: 10px;
  border-left: 4px solid #e8341a;
  text-decoration: none;
  transition: box-shadow 0.3s, transform 0.3s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.region-link:hover {
  box-shadow: 0 6px 20px rgba(232,52,26,0.15);
  transform: translateY(-2px);
}
.region-link .region-icon { font-size: 1.6rem; flex-shrink: 0; }
.region-link .region-info h4 { font-size: 0.95rem; font-weight: 700; color: #1a1a2e; margin: 0 0 2px 0; }
.region-link .region-info p { font-size: 0.75rem; color: #888; margin: 0; }
.footer-col a { color: rgba(255,255,255,0.75); text-decoration: none; display: block; padding: 3px 0; font-size: 0.85rem; transition: color 0.2s; }
.footer-col a:hover { color: #fff; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #e8341a, #c42a14);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}
.cta-section h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.cta-section p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 36px; }
.cta-contacts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 48px;
  margin-bottom: 36px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.cta-contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.cta-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  margin-bottom: 4px;
}
.cta-icon svg {
  display: block;
}
.cta-val {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.4;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2em;
}
.cta-lbl {
  font-size: 0.85rem;
  opacity: 0.75;
  color: #fff;
  line-height: 1.4;
}

/* ===== Footer ===== */
footer {
  background: #111;
  color: rgba(255,255,255,0.6);
  padding: 60px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid #333;
}
.footer-col p, .footer-col a {
  font-size: 0.85rem;
  line-height: 2;
  display: block;
  transition: color 0.2s;
}
.footer-col a:hover { color: #e8341a; }
.footer-bottom {
  border-top: 1px solid #222;
  padding-top: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.78rem;
  flex-wrap: nowrap;
  gap: 0;
  white-space: nowrap;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #e8341a; }

/* ===== FAQ区块 ===== */
.faq-section { background: #f8f9fb; }
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.faq-item {
  background: #fff;
  border-radius: 10px;
  padding: 24px 28px;
  border-left: 4px solid #e8341a;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: 0 6px 24px rgba(0,0,0,0.10); }
.faq-q {
  font-size: 1rem;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 10px;
  line-height: 1.5;
}
.faq-q::before {
  content: 'Q';
  display: inline-block;
  background: #e8341a;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  width: 20px;
  height: 20px;
  border-radius: 4px;
  text-align: center;
  line-height: 20px;
  margin-right: 8px;
  vertical-align: middle;
}
.faq-a {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.8;
  padding-left: 28px;
}
@media (max-width: 768px) {
  .faq-grid { grid-template-columns: 1fr; }
}

/* ===== 悬浮联系按钮 ===== */
.float-contact {
  position: fixed;
  right: 24px;
  bottom: 80px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 999;
}
.float-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #e8341a;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 4px 16px rgba(232,52,26,0.4);
  cursor: pointer;
  transition: all 0.3s;
  position: relative;
}
.float-btn:hover { background: #c42a14; transform: scale(1.1); }
.float-btn .tooltip {
  position: absolute;
  right: 62px;
  background: #333;
  color: #fff;
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.float-btn:hover .tooltip { opacity: 1; }
.back-top {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #555;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 999;
  transition: all 0.3s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}
.back-top:hover { background: #e8341a; }

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cap-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .top-bar .container { flex-direction: column; gap: 4px; text-align: center; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    padding: 16px;
    z-index: 999;
  }
  .hero h1 { font-size: 2rem; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .area-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cap-numbers { grid-template-columns: repeat(2, 1fr); }
  .section-title { font-size: 1.6rem; }
  .cta-section h2 { font-size: 1.6rem; }
  .cta-contacts { grid-template-columns: 1fr; gap: 20px; }
  .process-steps { gap: 20px; }
  .step:not(:last-child)::after { display: none; }
}