/* =====================================================
   工业胶带制造商官网 主样式
   响应式设计：桌面端 / 平板 / 移动端
   ===================================================== */

:root {
  --primary: #f4a91f;        /* 主色 胶带黄 */
  --primary-dark: #d8900a;
  --dark: #1a2530;
  --text: #2b3642;
  --muted: #6b7a88;
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --border: #e6ecf2;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(20, 40, 60, 0.08);
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 12px 28px; border-radius: 50px;
  font-weight: 600; font-size: 15px; cursor: pointer; border: 2px solid transparent;
  transition: var(--transition); text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(244,169,31,0.35); }
.btn-outline { border-color: var(--dark); color: var(--dark); background: transparent; }
.btn-outline:hover { background: var(--dark); color: #fff; }
.btn-light { background: #fff; color: var(--dark); }
.btn-sm { padding: 9px 20px; font-size: 14px; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: #fff; box-shadow: 0 1px 0 var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 50%;
  display: inline-block; flex-shrink: 0;
  object-fit: cover;
}
.logo-text { font-weight: 800; font-size: 20px; color: var(--dark); line-height: 1.1; }
.logo-text small { display: block; font-size: 10px; font-weight: 500; color: var(--muted); letter-spacing: 0.4px; }

.main-nav ul { display: flex; align-items: center; gap: 28px; }
.main-nav a { font-weight: 600; font-size: 15px; color: var(--text); transition: color var(--transition); }
.main-nav a:hover { color: var(--primary-dark); }
.main-nav .caret { font-size: 10px; margin-left: 3px; }

.has-dropdown { position: relative; }
.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 220px;
  background: #fff; box-shadow: var(--shadow); border-radius: var(--radius);
  padding: 8px 0; opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: var(--transition); border: 1px solid var(--border);
}
.has-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown li a { display: block; padding: 10px 20px; font-weight: 500; font-size: 14px; }
.dropdown li a:hover { background: var(--bg-soft); color: var(--primary-dark); }

.header-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn { font-size: 20px; display: inline-flex; align-items: center; justify-content: center; color: var(--dark); }
.icon-btn:hover { color: var(--primary-dark); }

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

/* ---------- 首页透明导航栏（幻灯片延伸到顶部） ---------- */
.is-home .site-header {
  position: absolute; top: 0; left: 0; right: 0;
  background: transparent; box-shadow: none; z-index: 101;
}
.is-home .site-header .logo-text { color: #fff; }
.is-home .site-header .logo-text small { color: rgba(255,255,255,0.75); }
.is-home .site-header .main-nav a { color: rgba(255,255,255,0.92); }
.is-home .site-header .main-nav a:hover { color: var(--primary); }
.is-home .site-header .icon-btn { color: #fff; }
.is-home .site-header .icon-btn:hover { color: var(--primary); }
.is-home .site-header .nav-toggle span { background: #fff; }
/* 下拉菜单保持白底深字，保证可读性 */
.is-home .site-header .dropdown { background: #fff; }
.is-home .site-header .dropdown li a { color: var(--text); }
.is-home .site-header .dropdown li a:hover { color: var(--primary-dark); background: var(--bg-soft); }

/* ---------- Hero 背景幻灯片 ---------- */
.hero {
  position: relative; overflow: hidden;
  color: #fff; padding: 150px 0 90px;
  min-height: 560px; display: flex; align-items: center;
  background: var(--dark); /* 图片加载前的兜底背景 */
}

/* 背景图片层 */
.hero-slides { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; }
.hero-slide {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover; background-position: center;
  background-repeat: no-repeat;
  opacity: 0; transform: scale(1.08);
  transition: opacity 1.1s ease-in-out, transform 6s ease-in-out;
  will-change: opacity, transform;
}
.hero-slide.is-active { opacity: 1; transform: scale(1); }

/* 半透明遮罩：压暗背景，让文字始终清晰可读 */
.hero-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 1;
  background: linear-gradient(90deg, rgba(16, 24, 32, 0.72) 0%, rgba(16, 24, 32, 0.45) 45%, rgba(16, 24, 32, 0.25) 100%);
}
/* 顶部再叠一层，兼容移动端文字居中时上下的可读性 */
.hero-overlay::after {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(180deg, rgba(16,24,32,0.25) 0%, transparent 40%, rgba(16,24,32,0.35) 100%);
}

/* 文字层 */
.hero-content { position: relative; z-index: 2; }
.hero-badge {
  display: inline-block; background: rgba(244,169,31,0.92); color: #fff;
  padding: 7px 18px; border-radius: 50px; font-size: 13px; font-weight: 700;
  margin-bottom: 22px; letter-spacing: 0.3px;
}
.hero h1 {
  font-size: 54px; line-height: 1.12; font-weight: 800; margin-bottom: 22px;
  color: #fff; text-shadow: 0 2px 18px rgba(0,0,0,0.45), 0 1px 3px rgba(0,0,0,0.5);
}
.hero h1 span { color: var(--primary); }
.hero p {
  font-size: 18px; color: rgba(255,255,255,0.92); max-width: 560px; margin-bottom: 34px;
  text-shadow: 0 1px 6px rgba(0,0,0,0.5); line-height: 1.7;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-actions .btn-outline { border-color: rgba(255,255,255,0.7); color: #fff; }
.hero-actions .btn-outline:hover { background: #fff; color: var(--dark); }

.hero-stats {
  display: flex; gap: 44px; margin-top: 56px; flex-wrap: wrap;
  padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.22);
}
.hero-stat .num {
  font-size: 38px; font-weight: 800; color: #fff;
  text-shadow: 0 2px 10px rgba(0,0,0,0.4);
}
.hero-stat .label { font-size: 14px; color: rgba(255,255,255,0.82); text-shadow: 0 1px 4px rgba(0,0,0,0.5); }

/* 指示点 */
.hero-dots {
  position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%);
  z-index: 3; display: flex; gap: 10px;
}
.hero-dots button {
  width: 26px; height: 5px; border-radius: 3px; border: none; cursor: pointer;
  background: rgba(255,255,255,0.4); transition: background var(--transition), width var(--transition);
  padding: 0;
}
.hero-dots button.is-active { background: var(--primary); width: 40px; }

/* ---------- 通用区块 ---------- */
.section { padding: 80px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 50px; }
.section-head .eyebrow { color: var(--primary-dark); font-weight: 700; font-size: 14px; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.section-head h2 { font-size: 36px; font-weight: 800; color: var(--dark); margin-bottom: 14px; }
.section-head p { color: var(--muted); font-size: 16px; }

/* ---------- 荣誉墙 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.honor-item {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; transition: var(--transition);
}
.honor-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(244,169,31,0.4); }
.honor-item .icon { width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%; background: rgba(244,169,31,0.12); display: flex; align-items: center; justify-content: center; color: var(--primary-dark); }
.honor-item .icon svg { width: 26px; height: 26px; }
.honor-item h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.honor-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------- 客户徽标墙 ---------- */
.partner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.partner-item {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; transition: var(--transition);
}
.partner-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.partner-logo {
  font-size: 24px; font-weight: 800; color: #9aa7b2; letter-spacing: 0.5px;
  margin-bottom: 10px; line-height: 1.3;
}
.partner-item:hover .partner-logo { color: var(--dark); }
.partner-item p { font-size: 13px; color: var(--muted); line-height: 1.6; }

/* ---------- 车间/设备卡片 ---------- */
.workshop-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.workshop-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; transition: var(--transition);
}
.workshop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.workshop-card .icon { width: 46px; height: 46px; border-radius: 10px; background: rgba(244,169,31,0.12); display: flex; align-items: center; justify-content: center; color: var(--primary-dark); margin-bottom: 16px; }
.workshop-card .icon svg { width: 24px; height: 24px; }
.workshop-card h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.workshop-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }

.equipment-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.equipment-item { display: flex; align-items: center; gap: 12px; padding: 16px 18px; background: #fff; border: 1px solid var(--border); border-radius: 8px; }
.equipment-item .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--primary); flex-shrink: 0; }
.equipment-item span { font-size: 15px; color: var(--text); font-weight: 600; }

/* ---------- 分类卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.cat-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: var(--transition); box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  display: flex; flex-direction: column;
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.cat-card .thumb { height: 200px; background: var(--bg-soft); overflow: hidden; }
.cat-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.cat-card:hover .thumb img { transform: scale(1.06); }
.cat-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.cat-card h3 { font-size: 19px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.cat-card p { color: var(--muted); font-size: 14px; flex: 1; margin-bottom: 16px; }
.cat-card .link { color: var(--primary-dark); font-weight: 600; font-size: 14px; }
.cat-card .link:hover { text-decoration: underline; }

/* ---------- 产品卡片 ---------- */
.product-card { display: flex; flex-direction: column; }
.product-card .spec-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.product-card .spec-tags span { background: var(--bg-soft); border: 1px solid var(--border); padding: 3px 10px; border-radius: 50px; font-size: 12px; color: var(--muted); }

/* ---------- 特色区块 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-item { text-align: center; padding: 30px 20px; }
.feature-item .icon { font-size: 40px; margin-bottom: 14px; }
.feature-item h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.feature-item p { font-size: 14px; color: var(--muted); }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--primary), #ffc94d);
  border-radius: 16px; padding: 50px; text-align: center; color: #3a2a00;
}
.cta-banner h2 { font-size: 32px; font-weight: 800; margin-bottom: 12px; }
.cta-banner p { font-size: 16px; margin-bottom: 24px; }

/* ---------- 页面标题 ---------- */
.page-banner { background: var(--dark); color: #fff; padding: 60px 0; }
.page-banner h1 { font-size: 40px; font-weight: 800; margin-bottom: 10px; }
.breadcrumb { font-size: 14px; color: #a8b7c5; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }

/* ---------- 列表 / 详情 ---------- */
.product-list-item {
  display: flex; gap: 24px; padding: 24px; background: #fff;
  border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 20px; transition: var(--transition);
}
.product-list-item:hover { box-shadow: var(--shadow); }
.product-list-item .thumb { width: 200px; height: 160px; flex-shrink: 0; background: var(--bg-soft); border-radius: 8px; overflow: hidden; }
.product-list-item .thumb img { width: 100%; height: 100%; object-fit: cover; }
.product-list-item h3 { font-size: 20px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.product-list-item p { color: var(--muted); font-size: 14px; margin-bottom: 14px; }

.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding: 60px 0; }
.product-detail .gallery img { border-radius: var(--radius); box-shadow: var(--shadow); }
.product-detail h1 { font-size: 34px; font-weight: 800; color: var(--dark); margin-bottom: 14px; }
.product-detail .meta { color: var(--primary-dark); font-weight: 600; margin-bottom: 18px; }
.product-detail .desc { color: var(--text); margin-bottom: 24px; }
.spec-table { width: 100%; border-collapse: collapse; margin-bottom: 28px; }
.spec-table th, .spec-table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; font-size: 14px; }
.spec-table th { background: var(--bg-soft); color: var(--dark); width: 35%; }

/* ---------- 产品内容块 ---------- */
.block { padding-bottom: 56px; }
.block-title { font-size: 26px; font-weight: 800; color: var(--dark); margin-bottom: 20px; }
.block-text { line-height: 1.9; color: var(--text); font-size: 16px; }

/* 卖点列表 */
.selling-points { margin: 20px 0 28px; }
.selling-points li { position: relative; padding: 10px 0 10px 32px; font-size: 15px; color: var(--text); border-bottom: 1px dashed var(--border); }
.selling-points li:last-child { border-bottom: none; }
.selling-points li::before { content: ''; position: absolute; left: 0; top: 17px; width: 18px; height: 2px; background: var(--primary); border-radius: 2px; }

/* 应用场景列表 */
.app-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.app-list li { position: relative; padding: 16px 18px 16px 40px; background: var(--bg-soft); border-radius: 8px; font-size: 15px; color: var(--text); }
.app-list li::before { content: '▸'; position: absolute; left: 18px; color: var(--primary-dark); font-weight: 700; }

/* 色卡切换 */
.color-swatches { display: flex; flex-wrap: wrap; gap: 18px; }
.swatch-item { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.swatch { width: 56px; height: 56px; border-radius: 50%; border: 2px solid var(--border); box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.swatch-label { font-size: 13px; color: var(--muted); font-weight: 600; }
.variant-link { display: inline-block; padding: 12px 18px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; font-weight: 600; font-size: 14px; color: var(--dark); transition: var(--transition); }
.variant-link:hover { border-color: var(--primary); color: var(--primary-dark); }

/* 存储提示卡 */
.notice-card { display: flex; gap: 16px; align-items: flex-start; padding: 20px 24px; background: #fef7e6; border: 1px solid #f6dfa6; border-radius: var(--radius); }
.notice-card .notice-icon { font-size: 24px; flex-shrink: 0; }
.notice-card strong { color: #b9770e; font-size: 15px; }
.notice-card p { color: #8a6a1f; font-size: 14px; margin-top: 4px; line-height: 1.6; }

/* 应用领域标签云 */
.app-fields { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }
.field-tag { padding: 14px 24px; background: #fff; border: 1px solid var(--border); border-radius: 50px; font-weight: 600; font-size: 15px; color: var(--dark); box-shadow: 0 2px 8px rgba(0,0,0,0.03); transition: var(--transition); }
.field-tag:hover { border-color: var(--primary); color: var(--primary-dark); transform: translateY(-2px); }

/* ---------- 博客 ---------- */
.blog-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.blog-card .thumb { height: 200px; background: var(--bg-soft); overflow: hidden; }
.blog-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.blog-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.blog-card .date { font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.blog-card h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 8px; line-height: 1.4; }
.blog-card p { color: var(--muted); font-size: 14px; flex: 1; margin-bottom: 14px; }

.article-content { max-width: 780px; margin: 0 auto; padding: 50px 0 80px; }
.article-content h1 { font-size: 36px; font-weight: 800; color: var(--dark); margin-bottom: 14px; }
.article-content .date { color: var(--muted); margin-bottom: 30px; }
.article-content p { margin-bottom: 18px; font-size: 16px; }
.article-content h2 { font-size: 24px; margin: 30px 0 14px; color: var(--dark); }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; color: var(--dark); }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 13px 16px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit; transition: var(--transition); background: #fff;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(244,169,31,0.15);
}
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; }

.alert { padding: 14px 18px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; font-weight: 600; }
.alert-success { background: #e6f7ec; color: #1a7f37; border: 1px solid #b7e4c7; }
.alert-error { background: #fdecec; color: #c0392b; border: 1px solid #f5c6c6; }

/* ---------- 搜索 ---------- */
.search-box { display: flex; gap: 10px; max-width: 560px; margin: 0 auto 40px; }
.search-box input { flex: 1; padding: 15px 20px; border: 2px solid var(--border); border-radius: 50px; font-size: 15px; }
.search-box input:focus { outline: none; border-color: var(--primary); }
.search-box button { padding: 15px 30px; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { padding: 20px 0; font-weight: 700; color: var(--dark); cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-size: 17px; }
.faq-q::after { content: '+'; font-size: 24px; color: var(--primary-dark); }
.faq-item.open .faq-q::after { content: '−'; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; color: var(--muted); }
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 20px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #b8c5d2; padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 50px; }
.logo-footer .logo-text { color: #fff; }
.logo-footer .logo-text small { color: #8fa0b0; }
.footer-col p { font-size: 14px; line-height: 1.8; margin-top: 14px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { font-size: 14px; color: #b8c5d2; transition: color var(--transition); }
.footer-col ul a:hover { color: var(--primary); }
.contact-list li { font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; }
.footer-bottom p { font-size: 13px; color: #8fa0b0; }

.back-to-top {
  position: fixed; bottom: 30px; right: 30px; width: 46px; height: 46px;
  background: var(--primary); color: #fff; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; font-size: 22px; cursor: pointer;
  opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow); z-index: 90;
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); }

/* =====================================================
   响应式断点
   ===================================================== */

/* 平板 */
@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .workshop-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-detail { grid-template-columns: 1fr; gap: 30px; }
  .contact-layout { grid-template-columns: 1fr; }
}

/* 移动端 */
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .header-inner { height: 64px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
    background: #fff; padding: 20px; transform: translateX(100%);
    transition: var(--transition); overflow-y: auto; z-index: 99;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav ul { flex-direction: column; align-items: flex-start; gap: 6px; }
  .main-nav ul li { width: 100%; }
  .main-nav ul li a { display: block; padding: 14px 8px; font-size: 17px; border-bottom: 1px solid var(--border); }
  .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; padding-left: 16px; display: none; }
  .has-dropdown.open .dropdown { display: block; }
  .header-actions .btn { display: none; }

  .hero { padding: 120px 0 56px; min-height: 520px; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 15px; }
  .hero-content { text-align: left; }
  .hero-actions { justify-content: flex-start; }
  .hero-stats { gap: 22px; margin-top: 40px; }
  .hero-stat .num { font-size: 26px; }

  /* 首页移动端：菜单展开为白底，文字需深色 */
  .is-home .main-nav { background: #fff; }
  .is-home .main-nav ul li a { color: var(--text); }
  .is-home .main-nav ul li a:hover { color: var(--primary-dark); }

  .section { padding: 56px 0; }
  .section-head h2 { font-size: 28px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: 1fr; }
  .workshop-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: 1fr; }
  .equipment-list { grid-template-columns: 1fr; }

  .cat-card .thumb { height: 160px; }

  .product-list-item { flex-direction: column; }
  .product-list-item .thumb { width: 100%; height: 200px; }

  .form-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 34px 20px; }
  .cta-banner h2 { font-size: 24px; }
  .app-list { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .page-banner h1 { font-size: 30px; }
  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 18px; }
}