/* ============================================================
   湖南领炬机械制造有限公司 - 企业官网样式
   ============================================================ */
:root {
  --primary: #e60012;
  --primary-dark: #b8000e;
  --dark: #1f2430;
  --gray: #6b7280;
  --light: #f6f7f9;
  --border: #e5e7eb;
  --max-width: 1100px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--dark);
  background: #fff;
  line-height: 1.8;
  font-size: 16px;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

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

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 6px rgba(0, 0, 0, .04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand img { height: 44px; width: auto; }

.main-nav ul {
  display: flex;
  gap: 8px;
}

.main-nav a {
  display: block;
  padding: 8px 18px;
  font-size: 16px;
  color: var(--dark);
  border-radius: 4px;
  transition: color .2s, background .2s;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  background: rgba(230, 0, 18, .06);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 26px;
  cursor: pointer;
  color: var(--dark);
  line-height: 1;
  padding: 6px;
}

/* ---------- Hero 横幅 ---------- */
.hero {
  position: relative;
  color: #fff;
  background:
    linear-gradient(120deg, rgba(15, 18, 25, .88) 0%, rgba(184, 0, 14, .78) 100%),
    repeating-linear-gradient(45deg, #10131a 0 2px, #141821 2px 4px);
  padding: 110px 0 120px;
  text-align: center;
}

.hero h1 {
  font-size: 40px;
  letter-spacing: 4px;
  margin-bottom: 14px;
}

.hero .en {
  font-size: 18px;
  letter-spacing: 1px;
  opacity: .85;
  margin-bottom: 22px;
}

.hero .slogan {
  font-size: 20px;
  font-weight: 300;
  opacity: .95;
}

.hero .slogan-en {
  font-size: 14px;
  opacity: .7;
  margin-top: 4px;
}

/* 页面小横幅（内页顶部） */
.page-banner {
  color: #fff;
  background: linear-gradient(120deg, rgba(15, 18, 25, .9), rgba(184, 0, 14, .8));
  padding: 52px 0;
  text-align: center;
}

.page-banner h1 { font-size: 30px; letter-spacing: 3px; }
.page-banner p { font-size: 14px; opacity: .75; margin-top: 4px; }

/* ---------- 通用区块 ---------- */
.section { padding: 70px 0; }
.section.alt { background: var(--light); }

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 28px;
  letter-spacing: 2px;
}

.section-title h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  background: var(--primary);
  margin: 12px auto 0;
}

.section-title p {
  color: var(--gray);
  font-size: 14px;
  margin-top: 10px;
}

/* ---------- 首页：数据 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat {
  text-align: center;
  padding: 30px 12px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: transform .2s, box-shadow .2s;
}

.stat:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .07);
}

.stat .num {
  font-size: 34px;
  font-weight: 700;
  color: var(--primary);
}

.stat .num small { font-size: 18px; }
.stat .label { color: var(--gray); font-size: 14px; margin-top: 6px; }

/* ---------- 首页：核心能力卡片 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 26px;
  transition: transform .2s, box-shadow .2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, .07);
}

.card .icon {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background: rgba(230, 0, 18, .08);
  color: var(--primary);
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--gray); font-size: 15px; }

/* ---------- 首页：主营产品 ---------- */
.products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.product-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  transition: border-color .2s, transform .2s;
}

.product-item:hover { border-color: var(--primary); transform: translateY(-3px); }

.product-item .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  flex: none;
}

/* ---------- 公司简介页 ---------- */
.profile-block { margin-bottom: 42px; }

.profile-block h2 {
  font-size: 22px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  margin-bottom: 16px;
}

.profile-block p {
  text-align: justify;
  color: #333;
  margin-bottom: 12px;
}

.profile-block ul {
  padding-left: 6px;
}

.profile-block ul li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 8px;
  color: #333;
}

.profile-block ul li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--primary);
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 30px 28px;
}

.contact-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  margin-bottom: 16px;
}

.contact-card h3 .icon {
  color: var(--primary);
  font-size: 22px;
}

.contact-card p,
.contact-card li { color: #333; font-size: 15px; margin-bottom: 6px; }

.contact-card table { width: 100%; border-collapse: collapse; }
.contact-card td { padding: 7px 0; font-size: 15px; vertical-align: top; }
.contact-card td:first-child { color: var(--gray); width: 82px; white-space: nowrap; }

.map-tip {
  background: var(--light);
  border-left: 4px solid var(--primary);
  border-radius: 6px;
  padding: 20px 24px;
  color: #333;
  font-size: 15px;
}

.map-tip strong { color: var(--primary); }

/* ---------- 相关资料下载 ---------- */
.download-list { display: flex; flex-direction: column; gap: 16px; }

.download-item {
  display: flex;
  align-items: center;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  transition: border-color .2s, box-shadow .2s;
}

.download-item:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 16px rgba(0, 0, 0, .06);
}

.download-item .file-icon {
  flex: none;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: rgba(230, 0, 18, .08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-item .info { flex: 1; }
.download-item .info h3 { font-size: 17px; }
.download-item .info p { color: var(--gray); font-size: 13px; }

.download-item .btn {
  flex: none;
  padding: 8px 20px;
  background: var(--primary);
  color: #fff;
  border-radius: 6px;
  font-size: 14px;
  transition: background .2s;
}

.download-item .btn:hover { background: var(--primary-dark); }

/* ---------- 底部 ---------- */
.site-footer {
  background: var(--dark);
  color: #cfd4dc;
  padding: 56px 0 0;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}

.site-footer h4 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.site-footer li { margin-bottom: 8px; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
  padding: 18px 0;
  text-align: center;
  color: #8b93a1;
  font-size: 13px;
}

.footer-bottom a { color: #aab1bd; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: 1fr; }
  .products { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }

  .nav-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 16px rgba(0, 0, 0, .08);
  }

  .main-nav.open { display: block; }

  .main-nav ul { flex-direction: column; gap: 0; padding: 8px 0; }
  .main-nav a { padding: 12px 24px; }

  .hero h1 { font-size: 28px; }
  .hero { padding: 70px 0 80px; }
}