/* =====================================================
   淄博金展防腐科技 — PC端官网公共样式
   配色：深蓝#0a2e5c / 主蓝#1565c0 / 橙#ff6b00 / 金#ffaa00
   容器宽度：1200px
   ===================================================== */

/* ===== CSS变量 ===== */
:root {
  --dark-blue: #0a2e5c;
  --main-blue: #1565c0;
  --light-blue: #1976d2;
  --orange: #ff6b00;
  --orange-end: #ff9500;
  --gold: #ffaa00;
  --bg: #f5f6fa;
  --white: #ffffff;
  --text: #222;
  --text-secondary: #555;
  --text-muted: #888;
  --border: #e0e8f5;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --nav-h: 72px;
  --container: 1200px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }

/* ===== 容器 ===== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: linear-gradient(135deg, var(--dark-blue) 0%, var(--main-blue) 100%);
  box-shadow: 0 2px 16px rgba(10,46,92,0.3);
  transition: box-shadow 0.3s;
}
.site-header .container {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.header-logo {
  display: flex; align-items: center; gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--orange-end));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 900; color: #fff;
  box-shadow: 0 3px 10px rgba(255,107,0,0.4);
  flex-shrink: 0;
}
.logo-text .brand { font-size: 1.1rem; font-weight: 800; color: #fff; letter-spacing: 0.5px; }
.logo-text .slogan { font-size: 0.72rem; color: rgba(255,255,255,0.7); }

/* 导航菜单 */
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  padding: 8px 16px;
  font-size: 0.9rem; font-weight: 600; color: rgba(255,255,255,0.88);
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}
.site-nav a:hover, .site-nav a.active {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.site-nav a.active { color: var(--gold); }

/* 右侧联系区 */
.header-contact {
  display: flex; align-items: center; gap: 16px; flex-shrink: 0;
}
.header-tel {
  text-align: right;
}
.header-tel .tel-label { font-size: 0.68rem; color: rgba(255,255,255,0.65); }
.header-tel .tel-num { font-size: 1.05rem; font-weight: 800; color: var(--gold); letter-spacing: 0.5px; }
.header-cta {
  background: linear-gradient(135deg, var(--orange), var(--orange-end));
  color: #fff; border: none; border-radius: 24px;
  padding: 10px 24px; font-size: 0.88rem; font-weight: 700;
  white-space: nowrap; cursor: pointer;
  box-shadow: 0 3px 12px rgba(255,107,0,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
  display: inline-flex; align-items: center; gap: 6px;
}
.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,0,0.5);
}

/* ===== 页面正文偏移 ===== */
.page-body { padding-top: var(--nav-h); }

/* ===== Section 通用 ===== */
.section { padding: 72px 0; }
.section-bg { background: var(--white); }
.section-alt { background: var(--bg); }
.section-dark { background: var(--dark-blue); }

.section-header { text-align: center; margin-bottom: 52px; }
.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(21,101,192,0.1), rgba(21,101,192,0.05));
  color: var(--main-blue); font-size: 0.78rem; font-weight: 700;
  padding: 5px 16px; border-radius: 20px; border: 1px solid rgba(21,101,192,0.2);
  margin-bottom: 12px; letter-spacing: 1px;
}
.section-title {
  font-size: 2rem; font-weight: 800; color: var(--dark-blue);
  letter-spacing: 1px; margin-bottom: 12px;
}
.section-sub {
  font-size: 0.95rem; color: var(--text-muted); max-width: 600px; margin: 0 auto;
}
.title-line {
  width: 48px; height: 4px;
  background: linear-gradient(90deg, var(--main-blue), var(--orange));
  border-radius: 2px; margin: 14px auto 0;
}
.section-dark .section-title { color: #fff; }
.section-dark .section-sub { color: rgba(255,255,255,0.65); }
.section-dark .section-tag { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.8); border-color: rgba(255,255,255,0.2); }

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--orange), var(--orange-end));
  color: #fff; border: none; border-radius: 28px;
  padding: 14px 32px; font-size: 1rem; font-weight: 700; cursor: pointer;
  box-shadow: 0 4px 16px rgba(255,107,0,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,0,0.5); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent;
  color: #fff; border: 2px solid rgba(255,255,255,0.6); border-radius: 28px;
  padding: 12px 30px; font-size: 1rem; font-weight: 700; cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }
.btn-blue {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  color: #fff; border: none; border-radius: 28px;
  padding: 13px 30px; font-size: 0.95rem; font-weight: 700; cursor: pointer;
  box-shadow: 0 4px 14px rgba(21,101,192,0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn-blue:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(21,101,192,0.45); }

/* ===== Hero / Banner ===== */
.hero {
  position: relative; overflow: hidden;
  height: 620px;
  background: var(--dark-blue);
}
.hero-video-wrap {
  position: absolute; inset: 0;
}
.hero-video-wrap video {
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity 1s ease;
}
.hero-video-wrap video.video-ready { opacity: 1; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,46,92,0.85) 0%, rgba(10,46,92,0.55) 50%, rgba(10,46,92,0.3) 100%);
  display: flex; align-items: center;
}
.hero-content { position: relative; z-index: 1; }
.hero-tag {
  display: inline-block;
  background: rgba(255,107,0,0.9); color: #fff; font-size: 0.78rem; font-weight: 700;
  padding: 6px 18px; border-radius: 20px; letter-spacing: 1.5px; margin-bottom: 20px;
}
.hero-title {
  font-size: 3rem; font-weight: 900; color: #fff;
  line-height: 1.2; letter-spacing: 2px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.4);
  margin-bottom: 14px;
}
.hero-title span { color: var(--gold); }
.hero-desc {
  font-size: 1.05rem; color: rgba(255,255,255,0.85);
  line-height: 1.9; max-width: 580px; margin-bottom: 36px;
}
.hero-btns { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* Hero右侧统计卡 */
.hero-stats {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 16px; max-width: 360px;
}
.hero-stat-card {
  background: rgba(255,255,255,0.1); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2); border-radius: var(--radius-md);
  padding: 20px 18px; text-align: center;
}
.stat-num { font-size: 1.8rem; font-weight: 900; color: var(--gold); line-height: 1; }
.stat-unit { font-size: 0.78rem; color: var(--gold); }
.stat-label { font-size: 0.78rem; color: rgba(255,255,255,0.75); margin-top: 6px; line-height: 1.4; }

/* Hero底部数据条 */
.hero-bar {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 2;
  background: linear-gradient(135deg, rgba(10,46,92,0.95), rgba(21,101,192,0.95));
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-bar .container {
  display: flex; align-items: stretch; height: 76px;
}
.hbar-item {
  flex: 1; display: flex; align-items: center; justify-content: center;
  gap: 12px; padding: 0 16px;
  border-right: 1px solid rgba(255,255,255,0.1);
}
.hbar-item:last-child { border-right: none; }
.hbar-icon {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,170,0,0.15);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.hbar-text .num { font-size: 1.1rem; font-weight: 900; color: var(--gold); }
.hbar-text .unit { font-size: 0.7rem; color: var(--gold); }
.hbar-text .label { font-size: 0.72rem; color: rgba(255,255,255,0.7); margin-top: 2px; }

/* ===== 产品中心 ===== */
.products-tabs {
  display: flex; gap: 10px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 44px;
}
.prod-tab {
  padding: 10px 24px; border-radius: 28px;
  font-size: 0.9rem; font-weight: 700; white-space: nowrap;
  background: var(--white); color: #555; border: 1.5px solid var(--border);
  cursor: pointer; transition: all 0.25s;
  box-shadow: var(--shadow-sm);
}
.prod-tab:hover { border-color: var(--main-blue); color: var(--main-blue); }
.prod-tab.active {
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  color: #fff; border-color: transparent;
  box-shadow: 0 4px 16px rgba(21,101,192,0.35);
  transform: translateY(-1px);
}
.prod-panel { display: none; }
.prod-panel.active { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }

.prod-gallery { position: sticky; top: calc(var(--nav-h) + 24px); }
.prod-img-main {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  cursor: zoom-in; transition: transform 0.3s;
}
.prod-img-main:hover { transform: scale(1.02); }
.prod-thumb-row {
  display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap;
}
.prod-thumb {
  width: 80px; height: 60px; object-fit: cover;
  border-radius: var(--radius-sm); border: 2px solid transparent;
  cursor: pointer; transition: border-color 0.2s, transform 0.2s;
}
.prod-thumb:hover { transform: scale(1.05); }
.prod-thumb.active { border-color: var(--main-blue); }

.prod-info { padding-top: 4px; }
.prod-name { font-size: 1.6rem; font-weight: 800; color: var(--dark-blue); margin-bottom: 10px; }
.prod-badge {
  display: inline-block;
  background: linear-gradient(135deg, #e3f0ff, #c8deff);
  color: var(--main-blue); font-size: 0.78rem; font-weight: 700;
  padding: 5px 14px; border-radius: 14px; margin-bottom: 16px;
  border: 1px solid #bbdaff;
}
.prod-desc { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.9; margin-bottom: 24px; }
.prod-specs {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 28px;
}
.spec-item {
  background: var(--bg); border-radius: var(--radius-sm); padding: 14px 16px;
  border-left: 4px solid var(--main-blue);
}
.spec-key { font-size: 0.72rem; color: var(--text-muted); margin-bottom: 4px; }
.spec-val { font-size: 0.95rem; font-weight: 700; color: var(--dark-blue); }
.prod-cta-row { display: flex; gap: 14px; }

/* ===== 优势卡片 ===== */
.advantage-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.advantage-card {
  background: var(--white); border-radius: var(--radius-lg); padding: 36px 28px;
  border: 1px solid var(--border); text-align: center;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative; overflow: hidden;
}
.advantage-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--main-blue), var(--orange));
  transform: scaleX(0); transition: transform 0.3s;
}
.advantage-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: #c8deff; }
.advantage-card:hover::before { transform: scaleX(1); }
.adv-icon {
  width: 64px; height: 64px; border-radius: 18px;
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; color: #fff;
  box-shadow: 0 6px 20px rgba(21,101,192,0.3);
}
.adv-title { font-size: 1.05rem; font-weight: 800; color: var(--dark-blue); margin-bottom: 8px; }
.adv-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.75; }
.adv-num { font-size: 1.5rem; font-weight: 900; color: var(--orange); margin-top: 12px; }
.adv-num-label { font-size: 0.72rem; color: var(--text-muted); }

/* ===== 图片网格（厂容/案例） ===== */
.gallery-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
}
.gallery-grid.col4 { grid-template-columns: repeat(4, 1fr); }
.gallery-grid.col2 { grid-template-columns: repeat(2, 1fr); }
.gallery-item {
  position: relative; overflow: hidden; border-radius: var(--radius-md);
  aspect-ratio: 4/3; cursor: zoom-in;
}
.gallery-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item.tall { grid-row: span 2; aspect-ratio: auto; }
.gallery-item.wide { grid-column: span 2; }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,46,92,0.7) 0%, transparent 50%);
  opacity: 0; transition: opacity 0.3s;
  display: flex; align-items: flex-end; padding: 16px;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-caption { font-size: 0.82rem; color: #fff; line-height: 1.5; }

/* ===== 证书轮播 ===== */
.cert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.cert-card {
  background: var(--white); border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: transform 0.3s, box-shadow 0.3s;
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cert-card img { width: 100%; aspect-ratio: 3/4; object-fit: cover; cursor: zoom-in; }
.cert-name {
  padding: 10px 12px; font-size: 0.82rem; text-align: center;
  color: var(--text-secondary); font-weight: 600; line-height: 1.4;
}

/* ===== 施工视频 ===== */
.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.video-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-md); background: #000;
}
.video-wrap video { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; }

/* ===== 服务流程 ===== */
.steps-row {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
  position: relative;
}
.steps-row::before {
  content: ''; position: absolute; top: 28px; left: 8%; right: 8%;
  height: 2px; background: linear-gradient(90deg, var(--main-blue), var(--orange));
  z-index: 0;
}
.step-item { text-align: center; padding: 0 12px; position: relative; z-index: 1; }
.step-num {
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  color: #fff; font-size: 1.2rem; font-weight: 900;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(21,101,192,0.35);
  border: 4px solid var(--white);
}
.step-title { font-size: 0.9rem; font-weight: 800; color: var(--dark-blue); margin-bottom: 8px; }
.step-desc { font-size: 0.78rem; color: var(--text-muted); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--white); border-radius: var(--radius-md); margin-bottom: 12px;
  border: 1px solid var(--border); overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.faq-item:hover { box-shadow: var(--shadow-md); }
.faq-q {
  padding: 20px 24px; font-size: 1rem; font-weight: 700; color: var(--dark-blue);
  display: flex; justify-content: space-between; align-items: center;
  cursor: pointer; user-select: none;
  transition: background 0.2s;
}
.faq-q:hover { background: var(--bg); }
.faq-icon {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  color: #fff; font-size: 1.2rem; font-weight: 400;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden;
  padding: 0 24px;
  font-size: 0.92rem; color: var(--text-secondary); line-height: 1.9;
  border-top: 0 solid var(--border);
  transition: max-height 0.35s ease, padding 0.35s ease, border-top-width 0.35s;
}
.faq-item.open .faq-a {
  max-height: 300px; padding: 16px 24px 22px;
  border-top-width: 1px;
}

/* ===== 留言表单 ===== */
.form-section { background: linear-gradient(135deg, var(--dark-blue) 0%, #1a3f70 100%); }
.form-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 48px 52px; max-width: 760px; margin: 0 auto;
  box-shadow: var(--shadow-lg);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-full { grid-column: 1 / -1; }
.form-row { margin-bottom: 0; }
.form-label { font-size: 0.85rem; font-weight: 700; color: #333; margin-bottom: 6px; display: block; }
.form-label span { color: #e53935; }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 13px 16px;
  border: 1.5px solid #dde4f0; border-radius: var(--radius-sm);
  font-size: 0.92rem; color: var(--text); background: var(--bg);
  outline: none; transition: border-color 0.2s, background 0.2s;
  font-family: inherit;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--main-blue); background: #fff;
  box-shadow: 0 0 0 3px rgba(21,101,192,0.1);
}
.form-textarea { height: 120px; resize: vertical; }
.form-area-row { display: flex; gap: 12px; }
.form-area-row .form-select { flex: 1; }
.form-submit {
  width: 100%; padding: 16px;
  background: linear-gradient(135deg, var(--orange), var(--orange-end));
  color: #fff; border: none; border-radius: 32px;
  font-size: 1.05rem; font-weight: 700;
  box-shadow: 0 4px 16px rgba(255,107,0,0.4);
  cursor: pointer; margin-top: 8px;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,0,0.5); }
.form-privacy { text-align: center; font-size: 0.72rem; color: #aaa; margin-top: 12px; }

/* ===== 应用行业 ===== */
.industry-grid {
  display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px;
}
.industry-card {
  background: var(--white); border-radius: var(--radius-md); padding: 24px 12px;
  text-align: center; border: 1px solid var(--border);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative; overflow: hidden;
}
.industry-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--main-blue), var(--orange));
  transform: scaleX(0); transition: transform 0.3s;
}
.industry-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #c8deff; }
.industry-card:hover::after { transform: scaleX(1); }
.industry-icon {
  width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(135deg, var(--main-blue), var(--light-blue));
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px; font-size: 1.4rem;
  box-shadow: 0 4px 14px rgba(21,101,192,0.25);
}
.industry-name { font-size: 0.85rem; font-weight: 700; color: var(--dark-blue); line-height: 1.3; }
.industry-count { font-size: 0.68rem; color: var(--text-muted); margin-top: 6px; }

/* ===== 企业简介 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-text p { font-size: 0.95rem; color: var(--text-secondary); line-height: 2; margin-bottom: 20px; }
.about-text p:last-child { margin-bottom: 0; }
.about-img-wrap {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
}
.about-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.about-highlights {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 28px;
}
.about-highlight {
  background: var(--bg); border-radius: var(--radius-sm); padding: 16px;
  border-left: 4px solid var(--main-blue);
}
.ah-num { font-size: 1.5rem; font-weight: 900; color: var(--orange); }
.ah-unit { font-size: 0.75rem; color: var(--orange); }
.ah-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

/* ===== 页脚 ===== */
.site-footer {
  background: #06203f;
  padding: 60px 0 0;
  color: rgba(255,255,255,0.65);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .brand-name { font-size: 1.1rem; font-weight: 800; color: #fff; margin-bottom: 6px; }
.footer-brand .brand-en { font-size: 0.72rem; color: rgba(255,255,255,0.45); margin-bottom: 16px; }
.footer-brand p { font-size: 0.82rem; line-height: 1.9; }
.footer-col h4 { font-size: 0.9rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.82rem; color: rgba(255,255,255,0.6); transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--gold); }
.footer-contact .contact-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; }
.footer-contact .ci-label { font-size: 0.72rem; color: rgba(255,255,255,0.45); }
.footer-contact .ci-val { font-size: 0.85rem; color: rgba(255,255,255,0.85); line-height: 1.6; }
.footer-contact .ci-val a { color: var(--gold); }
.footer-bottom {
  padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.78rem;
  flex-wrap: wrap; gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.45); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--gold); }
.footer-kw {
  padding: 16px 0; font-size: 0.65rem; color: rgba(255,255,255,0.25);
  border-top: 1px solid rgba(255,255,255,0.06); text-align: center; line-height: 2.2;
}

/* ===== 浮动按钮 ===== */
.fab-group {
  position: fixed; right: 24px; bottom: 80px; z-index: 900;
  display: flex; flex-direction: column; gap: 12px;
}
.fab-btn {
  width: 52px; height: 52px; border-radius: 50%; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.2rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
}
.fab-btn:hover { transform: scale(1.1); box-shadow: 0 6px 20px rgba(0,0,0,0.3); }
.fab-wx { background: linear-gradient(135deg, #07c160, #06ad56); }
.fab-top { background: linear-gradient(135deg, var(--main-blue), var(--light-blue)); }
.fab-tooltip {
  position: absolute; right: 62px; top: 50%; transform: translateY(-50%);
  background: rgba(0,0,0,0.75); color: #fff; font-size: 0.72rem;
  padding: 5px 10px; border-radius: 5px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity 0.2s;
}
.fab-btn:hover .fab-tooltip { opacity: 1; }

/* ===== Lightbox ===== */
.img-lightbox {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.92);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.img-lightbox.show { opacity: 1; visibility: visible; }
.img-lightbox img {
  max-width: 90vw; max-height: 88vh;
  object-fit: contain; border-radius: 6px;
  cursor: zoom-out; box-shadow: 0 0 50px rgba(0,0,0,0.5);
}
.lightbox-close {
  position: absolute; top: 20px; right: 20px;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.3);
  color: #fff; font-size: 1.4rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
  transition: background 0.2s;
}
.lightbox-close:hover { background: rgba(255,255,255,0.25); }

/* ===== 滚动淡入动画 ===== */
.fade-up { opacity: 0; transform: translateY(32px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }
.fade-up:nth-child(6) { transition-delay: 0.5s; }

/* ===== 面包屑（内页用） ===== */
.breadcrumb {
  background: var(--white); border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.breadcrumb .container {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.82rem; color: var(--text-muted);
}
.breadcrumb a { color: var(--main-blue); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb .sep { color: #ccc; }

/* ===== 页面标题Banner（内页） ===== */
.page-banner {
  background: linear-gradient(135deg, var(--dark-blue), var(--main-blue));
  padding: 60px 0; text-align: center;
}
.page-banner h1 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.page-banner p { font-size: 1rem; color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto; }

/* ===== 汉堡菜单按钮 ===== */
.nav-toggle {
  display: none;
  flex-direction: column; justify-content: center; align-items: center;
  width: 40px; height: 40px; border: none; background: transparent;
  cursor: pointer; padding: 4px; gap: 5px; flex-shrink: 0;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端悬浮拨号按钮 */
.fab-tel {
  display: none;
  position: fixed; bottom: 80px; left: 20px; z-index: 900;
  width: 52px; height: 52px; border-radius: 50%; border: none;
  background: linear-gradient(135deg, #07c160, #06ad56);
  color: #fff; font-size: 1.3rem; cursor: pointer;
  align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(7,193,96,0.4);
  transition: transform 0.2s, box-shadow 0.2s;
  text-decoration: none;
}
.fab-tel:hover { transform: scale(1.1); }

/* ===== 响应式 1200px ===== */
@media (max-width: 1200px) {
  .container { padding: 0 32px; }
  .hero-title { font-size: 2.5rem; }
  .cert-grid { grid-template-columns: repeat(4, 1fr); }
  .industry-grid { grid-template-columns: repeat(4, 1fr); }
  .steps-row { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .steps-row::before { display: none; }
}

/* ===== 响应式 1024px ===== */
@media (max-width: 1024px) {
  .site-nav a { padding: 8px 10px; font-size: 0.82rem; }
  .advantage-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ===== 平板端 768px ===== */
@media (max-width: 768px) {
  :root { --nav-h: 60px; }

  /* 导航 */
  .nav-toggle { display: flex; }
  .header-contact { display: none; }
  .site-nav {
    display: none;
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: linear-gradient(135deg, var(--dark-blue), var(--main-blue));
    flex-direction: column; align-items: stretch;
    padding: 16px 0; z-index: 999;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  }
  .site-nav.open { display: flex; }
  .site-nav a {
    padding: 14px 28px; font-size: 1rem;
    border-radius: 0; border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .site-nav a:last-child { border-bottom: none; }
  .logo-text .slogan { display: none; }
  .logo-text .brand { font-size: 0.95rem; }

  /* Hero */
  .hero { height: auto; min-height: 460px; }
  .hero .container {
    grid-template-columns: 1fr !important;
    gap: 24px; padding-top: 48px; padding-bottom: 80px;
  }
  .hero-stats { grid-template-columns: repeat(2,1fr); max-width: 100%; }
  .hero-title { font-size: 1.9rem; }
  .hero-desc { font-size: 0.92rem; max-width: 100%; }
  .hero-btns { flex-direction: column; gap: 10px; }
  .hero-btns .btn-primary, .hero-btns .btn-outline { width: 100%; justify-content: center; }
  .hero-bar .container { flex-wrap: wrap; height: auto; padding: 8px 0; }
  .hbar-item { flex: 0 0 33.33%; padding: 10px 8px; border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); }

  /* Trust strip */
  .trust-strip .container { flex-wrap: wrap; gap: 12px; justify-content: center; }
  .ts-sep { display: none; }
  .ts-item { flex: 0 0 calc(33% - 8px); }

  /* Section */
  .section { padding: 48px 0; }
  .section-title { font-size: 1.6rem; }
  .section-header { margin-bottom: 36px; }

  /* 优势卡片 */
  .advantage-grid { grid-template-columns: 1fr; gap: 16px; }

  /* 产品 */
  .prod-panel.active { grid-template-columns: 1fr; gap: 24px; }
  .prod-gallery { position: static; }
  .prod-detail-inner { grid-template-columns: 1fr !important; gap: 24px; }
  .prod-detail-inner.reverse .prod-gallery { order: 0; }
  .prod-detail-inner.reverse .prod-detail-info { order: 0; }
  .products-tabs { gap: 8px; }
  .prod-tab { padding: 8px 14px; font-size: 0.82rem; }
  .prod-nav { top: var(--nav-h); overflow-x: auto; flex-wrap: nowrap; justify-content: flex-start; padding: 12px 16px; gap: 8px; }
  .prod-nav a { white-space: nowrap; }

  /* 图片网格 */
  .gallery-grid { grid-template-columns: repeat(2,1fr) !important; }
  .gallery-item.wide { grid-column: span 2; }
  .gallery-masonry { columns: 2; }
  .cert-grid { grid-template-columns: repeat(2,1fr); }

  /* 步骤 */
  .steps-row { grid-template-columns: repeat(2,1fr); gap: 20px; }

  /* 关于我们 */
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-img-wrap { max-height: 260px; }

  /* 行业 */
  .industry-grid { grid-template-columns: repeat(3,1fr); gap: 12px; }

  /* 表单 */
  .form-card { padding: 32px 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-full { grid-column: 1; }

  /* 页脚 */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  /* 统计条 */
  .stats-bar { grid-template-columns: repeat(3,1fr); }
  .stats-bar-item:nth-child(3) { border-right: none; }
  .stats-bar-item:nth-child(4), .stats-bar-item:nth-child(5) { border-top: 1px solid rgba(255,255,255,0.1); }

  /* 关于页 */
  .team-grid { grid-template-columns: 1fr; }
  .honor-grid { grid-template-columns: repeat(2,1fr); }

  /* 厂容页 */
  .factory-hero-banner { height: 280px; }
  .video-grid, .video-trio { grid-template-columns: 1fr; }

  /* 悬浮按钮 */
  .fab-group { right: 16px; bottom: 90px; }
  .fab-tel { display: flex; }
}

/* about 联系信息网格响应式 */
@media (max-width: 768px) {
  .about-contact-grid {
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.6rem; }
  .hero-stat-card { padding: 14px 10px; }
  .stat-num { font-size: 1.4rem; }

  .hbar-item { flex: 0 0 50%; }

  .gallery-grid { grid-template-columns: 1fr !important; }
  .gallery-item.wide { grid-column: span 1; }
  .gallery-masonry { columns: 1; }

  .industry-grid { grid-template-columns: repeat(2,1fr); gap: 10px; }
  .industry-card { padding: 16px 8px; }
  .industry-icon { width: 40px; height: 40px; font-size: 1.1rem; }

  .steps-row { grid-template-columns: 1fr; }

  .cert-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }

  .honor-grid { grid-template-columns: repeat(2,1fr); }

  .stats-bar { grid-template-columns: repeat(2,1fr); }
  .stats-bar-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); }

  .section-title { font-size: 1.4rem; }
  .section { padding: 36px 0; }

  .page-banner h1 { font-size: 1.6rem; }
  .page-banner { padding: 40px 0; }

  .form-card { padding: 24px 16px; }
  .form-area-row { flex-direction: column; }
  .form-area-row .form-select { flex: none; }

  .about-highlights { grid-template-columns: repeat(2,1fr); }

  .prod-specs { grid-template-columns: 1fr; }

  .hero-btns { gap: 8px; }

  .trust-strip .container { gap: 8px; }
  .ts-item { flex: 0 0 calc(50% - 4px); }

  .footer-grid { gap: 20px; }

  /* 厂容页 */
  .factory-hero-banner { height: 200px; }
  .factory-hero-overlay { padding: 16px 20px; }
  .factory-hero-overlay h2 { font-size: 1.2rem; }

  /* 浮动按钮 */
  .fab-group { right: 12px; bottom: 80px; gap: 8px; }
  .fab-btn { width: 44px; height: 44px; }
  .fab-tel { bottom: 80px; left: 12px; width: 44px; height: 44px; font-size: 1.1rem; }
}