/* ============================================
   12. Mobile Bottom Navigation
   ============================================ */
.mobile-nav { display: none; }

@media (max-width: 767px) {
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: #fff;
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.08);
  }
  .mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 0 8px;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.65rem;
    transition: var(--transition);
    position: relative;
    cursor: pointer;
  }
  .mobile-nav-item svg {
    width: 22px;
    height: 22px;
    margin-bottom: 2px;
    stroke: var(--text-light);
    transition: var(--transition);
  }
  .mobile-nav-item.active,
  .mobile-nav-item:active {
    color: var(--primary);
  }
  .mobile-nav-item.active svg,
  .mobile-nav-item:active svg {
    stroke: var(--primary);
  }

  /* Submenu */
  .mobile-nav-submenu {
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%) scale(0.95);
    transform-origin: bottom center;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.12);
    border: 1px solid var(--border);
    min-width: 140px;
    padding: 4px 0;
    opacity: 0;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 1001;
  }
  .mobile-nav-item.open .mobile-nav-submenu {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) scale(1);
  }
  .mobile-nav-submenu a {
    display: block;
    padding: 10px 16px;
    font-size: 0.8rem;
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--border-light);
    text-align: center;
    white-space: nowrap;
  }
  .mobile-nav-submenu a:last-child {
    border-bottom: none;
  }
  .mobile-nav-submenu a:active {
    background: var(--bg-section);
    color: var(--primary);
  }

  /* Overlay for submenu */
  .mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(0,0,0,0.2);
  }
  .mobile-nav-overlay.show {
    display: block;
  }

  /* Adjust body padding for bottom nav */
  body {
    padding-bottom: 60px;
  }
  .footer {
    padding-bottom: 16px;
  }
}

/* ============================================
   Responsive Breakpoints
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --primary: #0a3d7c;        /* 深蓝 - 科技/专业/信任 */
  --primary-light: #1565c0;  /* 亮蓝 */
  --primary-dark: #062a5e;   /* 暗蓝 */
  --accent: #c8102e;         /* 红色 - 强调/CTA */
  --accent-light: #e53935;
  --gold: #d4a843;           /* 金色 - 品质/高端 */
  --gold-light: #f0c850;
  --text: #1a1a1a;
  --text-light: #555555;
  --text-muted: #999999;
  --bg: #ffffff;
  --bg-light: #f5f7fa;
  --bg-section: #eef2f7;
  --border: #e0e4ea;
  --shadow: 0 4px 20px rgba(10,61,124,0.08);
  --shadow-lg: 0 12px 40px rgba(10,61,124,0.15);
  --radius: 6px;
  --radius-lg: 12px;
  --transition: all 0.35s ease;
  --max-width: 1280px;
  --nav-height: 72px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text); }

/* ---------- Utility ---------- */
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.text-gold { color: var(--gold); }
.text-danger { color: var(--accent); }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }

.section { padding: 80px 0; }
.section-alt { background: var(--bg-section); }
.section-dark { background: var(--primary-dark); color: #fff; }
.section-cta { padding: 60px 0; text-align: center; }
.section-cta-title { font-size: 2rem; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  position: relative;
}
.section-dark .section-title { color: #fff; }
.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent);
  margin: 16px auto 0;
  border-radius: 2px;
}
.section-subtitle {
  font-size: 1rem;
  color: var(--text-light);
  text-align: center;
  margin-bottom: 48px;
  margin-top: 16px;
}
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  text-align: center;
  letter-spacing: 0.5px;
}
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; }
.btn-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-accent:hover { background: #a00d24; border-color: #a00d24; color: #fff; }
.btn-gold { background: var(--gold); color: #fff; border-color: var(--gold); }
.btn-gold:hover { background: #b8922e; border-color: #b8922e; color: #fff; }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-outline-white { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline-white:hover { background: #fff; color: var(--primary); }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }
.btn-lg { padding: 16px 44px; font-size: 1.1rem; }
.btn-rounded { border-radius: 50px; }

/* ---------- Header & Navigation ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  height: var(--nav-height);
  transition: var(--transition);
}
.header.scrolled { box-shadow: 0 2px 16px rgba(10,61,124,0.1); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  box-shadow: 0 2px 8px rgba(10,61,124,0.3);
}
.logo-text { font-size: 1.3rem; font-weight: 700; color: var(--primary); letter-spacing: 1px; }
.logo-sub { font-size: 0.65rem; color: var(--text-muted); display: block; letter-spacing: 0.5px; }

/* New Logo Images */
.logo-pc { height: 40px; width: auto; display: block; }
.logo-mobile { height: 36px; width: auto; display: none; }


.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-list a {
  padding: 8px 16px;
  font-size: 0.938rem;
  color: var(--text);
  border-radius: var(--radius);
  transition: var(--transition);
  font-weight: 500;
  position: relative;
}
.nav-list a:hover { color: var(--primary); background: var(--bg-section); }
.nav-list a.active { color: var(--primary); font-weight: 600; }
.nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-hotline {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
  white-space: nowrap;
}
.nav-hotline svg { width: 18px; height: 18px; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.menu-toggle span { width: 24px; height: 2px; background: var(--text); transition: var(--transition); }

/* ---------- Hero / Fullscreen Banner ---------- */
.hero-banner {
  margin-top: var(--nav-height);
  height: calc(100vh - var(--nav-height));
  min-height: 600px;
  position: relative;
  overflow: hidden;
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease;
  display: flex;
  align-items: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6,42,94,0.85) 0%, rgba(10,61,124,0.7) 60%, rgba(21,101,192,0.5) 100%);
}
.hero-slide-content {
  position: relative;
  z-index: 2;
  color: #fff;
  max-width: 700px;
  padding-left: 8%;
}
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-slide-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5), 0 4px 30px rgba(0,0,0,0.3), 0 0 60px rgba(0,0,0,0.2);
}
.hero-slide-content h1 span { color: #ffe082; text-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 0 20px rgba(255,224,130,0.3); }
.hero-desc {
  font-size: 1.05rem;
  opacity: 0.9;
  margin-bottom: 32px;
  line-height: 1.8;
  max-width: 560px;
}
.hero-btns { display: flex; flex-wrap: wrap; gap: 12px; }

/* Banner Indicators */
.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 12px;
}
.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid rgba(255,255,255,0.6);
}
.hero-dot.active { background: #fff; border-color: #fff; transform: scale(1.2); }

/* SCROLL DOWN */
.scroll-hint {
  position: absolute;
  bottom: 80px;
  left: 40px;
  z-index: 10;
  color: rgba(255,255,255,0.6);
  font-size: 0.75rem;
  letter-spacing: 3px;
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 8px;
}
.scroll-hint::after {
  content: '';
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.4);
  animation: scrollPulse 2s infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ---------- Data Counter Section ---------- */
.data-counter {
  background: #fff;
  padding: 0;
  margin-top: -60px;
  position: relative;
  z-index: 5;
}
.counter-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  transition: var(--transition);
}
.counter-card:hover { transform: translateY(-4px); }
.counter-num {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 8px;
}
.counter-num .unit { font-size: 1.2rem; font-weight: 600; }
.counter-label {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 500;
}
.counter-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
  margin: 10px 0;
}

/* ---------- Product Category Cards (4列) ---------- */
.product-category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.product-category-card {
  position: relative;
  aspect-ratio: 8 / 10;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}
.product-category-card:hover {
  z-index: 10;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.product-category-card .card-bg {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2.5%;
  right: 2.5%;
  background-size: 100% 100%;
  background-position: center center;
  background-repeat: no-repeat;
  transition: transform 0.6s ease;
  will-change: transform;
}
.product-category-card:hover .card-bg { transform: scale(1.05); }

/* 卡片背景填充色 - 防止图片未加载或裁切间隙 */
.card-bg.bg-raw { background-color: #0a3d7c; }
.card-bg.bg-health { background-color: #2e7d32; }
.card-bg.bg-functional { background-color: #e65100; }
.card-bg.bg-oem { background-color: #3a2060; }
.product-category-card .card-overlay {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 2.5%;
  right: 2.5%;
  background: linear-gradient(to top, rgba(6,42,94,0.9) 0%, rgba(10,61,124,0.3) 50%, transparent 100%);
  transition: var(--transition);
}
.product-category-card .card-content {
  position: absolute;
  bottom: 0;
  left: 2.5%;
  right: 2.5%;
  padding: 32px 24px;
  color: #fff;
  z-index: 2;
}
.product-category-card .card-content h3 {
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 8px;
  font-weight: 700;
}
.product-category-card .card-content p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 1.1rem;
  transition: var(--transition);
}
.card-btn:hover { background: var(--accent-light); transform: scale(1.1); }

/* Placeholder backgrounds for product cards */
.bg-raw { background: linear-gradient(135deg, #0a3d7c, #1565c0); }
.bg-health { background: linear-gradient(135deg, #1a5c3a, #2d9d6f); }
.bg-functional { background: linear-gradient(135deg, #5b4a1a, #8b7a30); }
.bg-oem { background: linear-gradient(135deg, #3a2060, #6a40a0); }

/* ---------- About / Company Intro Section ---------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  min-height: 500px;
}
.about-split-img {
  background-size: cover;
  background-position: center;
  position: relative;
}
.about-split-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(6,42,94,0.15), transparent);
}
.about-split-content {
  padding: 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.about-split-content h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary);
}
.about-split-content p {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 12px;
}

/* Data inline display */
.data-inline {
  display: flex;
  gap: 40px;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.data-inline-item { text-align: center; }
.data-inline-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}
.data-inline-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.data-inline-item .accent-bar {
  width: 30px;
  height: 3px;
  background: var(--accent);
  margin: 8px auto 0;
  border-radius: 2px;
}

/* ---------- Tech Advantages ---------- */
.advantage-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.advantage-item {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}
.advantage-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.advantage-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(10,61,124,0.2);
}
.advantage-item h3 { font-size: 1.05rem; margin-bottom: 8px; }
.advantage-item p { font-size: 0.875rem; color: var(--text-light); line-height: 1.7; }

/* ---------- News Section ---------- */
.news-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card-v2 {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.news-card-v2:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.news-card-date {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
}
.news-card-body { padding: 24px; }
.news-card-body h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.news-card-link {
  font-size: 0.85rem;
  color: var(--primary-light);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-card-link:hover { color: var(--primary); gap: 8px; }

/* Placeholder news images */
.news-img-placeholder {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.3);
  font-size: 3rem;
}

/* ---------- Cooperation Section ---------- */
.coop-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.coop-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid var(--primary);
  position: relative;
  overflow: hidden;
}
.coop-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, rgba(10,61,124,0.04), transparent);
  border-radius: 0 0 0 100%;
}
.coop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.coop-card:nth-child(2) { border-top-color: var(--accent); }
.coop-card:nth-child(3) { border-top-color: var(--gold); }
.coop-card:nth-child(4) { border-top-color: #5b8c5a; }
.coop-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.coop-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.coop-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; }

/* ---------- Right Sidebar ---------- */
.right-sidebar {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 999;
  background: var(--accent);
  border-radius: 8px 0 0 8px;
  display: flex;
  flex-direction: column;
  box-shadow: -2px 0 16px rgba(200,16,46,0.2);
}
.sidebar-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  background: transparent;
  position: relative;
}
.sidebar-btn:hover { background: rgba(255,255,255,0.15); }
.sidebar-btn + .sidebar-btn { border-top: 1px solid rgba(255,255,255,0.2); }
.sidebar-btn .tooltip {
  position: absolute;
  left: auto;
  right: 48px;
  top: 50%;
  margin-top: -16px;
  background: #062a5e;
  color: #fff;
  padding: 7px 14px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease;
  z-index: 10;
}
.sidebar-btn .tooltip::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 50%;
  margin-top: -6px;
  width: 0;
  height: 0;
  border-left: 6px solid #062a5e;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
}
.sidebar-btn:hover .tooltip,
.sidebar-btn:focus .tooltip,
.sidebar-btn.is-open .tooltip {
  opacity: 1 !important;
}
.sidebar-expand {
  background: var(--primary-dark);
  color: #fff;
  padding: 4px;
  text-align: center;
  font-size: 0.7rem;
  cursor: pointer;
  border-top: 1px solid rgba(255,255,255,0.2);
}

/* ---------- Compliance Warning Banner ---------- */
.compliance-banner {
  background: #fff3cd;
  border: 1px solid #ffc107;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.8rem;
  color: #856404;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0;
}
.compliance-banner strong { color: #664d03; }
.compliance-note {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 0.78rem;
  color: #856404;
  margin-top: 24px;
  line-height: 1.6;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; }
.footer p, .footer a { font-size: 0.85rem; }
.footer a { color: rgba(255,255,255,0.6); }
.footer a:hover { color: #fff; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-hotline { font-size: 1.5rem; font-weight: 700; color: var(--gold-light); margin-top: 8px; letter-spacing: 2px; }
.footer-cert {
  display: flex;
  gap: 12px;
  margin-top: 12px;
}
.footer-cert-badge {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.55rem;
  color: rgba(255,255,255,0.6);
  text-align: center;
  line-height: 1.2;
}
.footer-qrcode {
  width: 120px;
  height: 120px;
  background: #fff;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 8px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 20px;
  text-align: center;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* ---------- Page Banner ---------- */
.page-banner {
  margin-top: var(--nav-height);
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
}
.page-banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}
.page-banner-content h1 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 12px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}
.page-banner-content p {
  font-size: 1.05rem;
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }

/* ---------- Timeline ---------- */
.timeline {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  padding: 20px 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 80px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
  border-radius: 2px;
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 36px;
  position: relative;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-year {
  width: 70px;
  flex-shrink: 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  text-align: right;
  padding-right: 16px;
  padding-top: 4px;
}
.timeline-dot {
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--primary);
  flex-shrink: 0;
  margin-top: 6px;
  position: relative;
  z-index: 1;
}
.timeline-content {
  flex: 1;
  padding-left: 20px;
}
.timeline-content h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 4px;
}
.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ---------- Location Cards ---------- */
.location-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 32px;
}
.location-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.location-card-header {
  padding: 24px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--border);
}
.location-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
}
.location-card-header h3 {
  font-size: 1.2rem;
  font-weight: 600;
}
.location-card-body { padding: 20px 28px; }
.info-row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--bg-section);
  font-size: 0.9rem;
}
.info-row:last-child { border-bottom: none; }
.info-label {
  width: 100px;
  flex-shrink: 0;
  font-weight: 600;
  color: var(--text);
}
.info-value {
  flex: 1;
  color: var(--text-light);
}

/* ---------- Forms ---------- */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: #fff;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,61,124,0.1);
}
.form-group textarea { resize: vertical; min-height: 100px; }

/* ---------- Process Steps ---------- */
.process-steps {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0;
  margin: 32px 0;
}
.process-step {
  display: flex;
  align-items: center;
  gap: 8px;
}
.process-step-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.process-step-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.process-step-arrow {
  margin: 0 12px;
  color: var(--primary);
  font-size: 1.2rem;
}

/* ---------- Coop Cards (Homepage - 2 columns) ---------- */
.coop-cards-home {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.coop-cards-home .coop-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 4px solid var(--primary);
  position: relative;
  overflow: hidden;
}
.coop-cards-home .coop-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, rgba(10,61,124,0.04), transparent);
  border-radius: 0 0 0 100%;
}
.coop-cards-home .coop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.coop-cards-home .coop-card:nth-child(2) { border-top-color: var(--accent); }
.coop-cards-home .coop-card:nth-child(3) { border-top-color: var(--gold); }
.coop-cards-home .coop-card:nth-child(4) { border-top-color: #5b8c5a; }
.coop-cards-home .coop-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.coop-cards-home .coop-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.coop-cards-home .coop-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; }

/* ---------- Coop Cards (Cooperation page - 4 columns) ---------- */
.coop-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.coop-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 3px solid transparent;
}
.coop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--primary);
}
.coop-card-icon {
  font-size: 2.4rem;
  margin-bottom: 16px;
}
.coop-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.coop-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ---------- Contact Cards ---------- */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.contact-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.contact-card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.contact-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
  font-weight: 600;
}
.contact-card p {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

/* ---------- Empower Grid ---------- */
.empower-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.empower-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-bottom: 3px solid var(--primary);
}
.empower-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.empower-card-icon { font-size: 2rem; margin-bottom: 12px; }
.empower-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.empower-card p { font-size: 0.85rem; color: var(--text-light); }

/* ---------- Product Tabs ---------- */
.product-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 30px; }
.tab-btn {
  padding: 10px 28px;
  border-radius: 50px;
  background: var(--bg-section);
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.938rem;
  border: 2px solid transparent;
  font-weight: 500;
}
.tab-btn.active, .tab-btn:hover { background: var(--primary); color: #fff; }

.tab-panel.active { display: block; }

/* ---------- Info Table ---------- */
.table-scroll-wrapper { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; margin-bottom: 24px; }
.table-scroll-wrapper .info-table { min-width: 600px; }
.info-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.info-table th, .info-table td { padding: 10px 12px; border: 1px solid var(--border); text-align: left; }
.info-table th { background: #1565c0; font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-categories { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin-bottom: 30px; }
.faq-cat-btn {
  padding: 8px 20px;
  border-radius: 20px;
  background: var(--bg-section);
  color: var(--text-light);
  cursor: pointer;
  border: none;
  font-size: 0.875rem;
  transition: var(--transition);
}
.faq-cat-btn.active, .faq-cat-btn:hover { background: var(--primary); color: #fff; }

.faq-list { max-width: 100%; margin: 0 auto; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 10px; overflow: hidden; }
.faq-question {
  width: 100%;
  padding: 16px 20px;
  background: #fff;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.faq-question:hover { background: var(--bg-section); }
.faq-question::after { content: '+'; font-size: 1.2rem; color: var(--primary); transition: var(--transition); }
.faq-item.open .faq-question::after { content: '-'; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-answer-inner { padding: 0 20px 16px; font-size: 0.875rem; color: var(--text-light); line-height: 1.8; }

/* ---------- Form ---------- */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 6px; }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.938rem;
  transition: var(--transition);
  background: #fff;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10,61,124,0.1);
}
.form-textarea { min-height: 100px; resize: vertical; }

/* ---------- OEM Flow ---------- */
.oem-flow {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin: 30px 0;
}
.oem-step {
  background: var(--primary);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 600;
}
.oem-arrow { color: var(--accent); font-size: 1.2rem; }

/* ---------- Legal Pages ---------- */
.legal-content { max-width: 800px; margin: 0 auto; padding: 30px 20px; line-height: 1.9; }
.legal-content h2 { font-size: 1.3rem; margin: 30px 0 12px; padding-bottom: 8px; border-bottom: 2px solid var(--primary); color: var(--primary); }
.legal-content h3 { font-size: 1.05rem; margin: 20px 0 8px; }
.legal-content p { margin-bottom: 12px; font-size: 0.9rem; }
.legal-content ul { padding-left: 20px; margin-bottom: 12px; }
.legal-content li { list-style: disc; margin-bottom: 6px; font-size: 0.9rem; }

/* ---------- Trust Wall ---------- */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  transition: var(--transition);
}
.trust-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.trust-icon { font-size: 2rem; margin-bottom: 8px; }
.trust-item h4 { font-size: 0.85rem; }

/* ---------- Cooperation Detail Cards ---------- */
.coop-detail-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 28px;
  overflow: hidden;
  transition: var(--transition);
}
.coop-detail-card:hover { box-shadow: var(--shadow-lg); }
.coop-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 32px;
  border-left: 5px solid var(--primary);
  background: var(--bg-light);
}
.coop-detail-header h3 {
  font-size: 1.2rem;
  margin-bottom: 4px;
  color: var(--primary);
}
.coop-detail-header p {
  font-size: 0.85rem;
  color: var(--text-light);
  margin: 0;
}
.coop-detail-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(10,61,124,0.2);
}
.coop-detail-body { padding: 28px 32px; }
.coop-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.coop-detail-section h4 {
  font-size: 0.9rem;
  color: var(--primary);
  margin-bottom: 8px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}
.coop-detail-section h4::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 14px;
  background: var(--accent);
  border-radius: 2px;
}
.coop-detail-section p {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.7;
}
.coop-detail-section ul {
  padding-left: 0;
  list-style: none;
}
.coop-detail-section ul li {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.7;
  padding-left: 16px;
  position: relative;
}
.coop-detail-section ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
}
.coop-detail-section-full { grid-column: 1 / -1; }
.coop-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.coop-detail-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg-section);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 500;
}

/* ---------- Tour Timeline ---------- */
.tour-timeline {
  position: relative;
  padding-left: 80px;
}
.tour-timeline::before {
  content: '';
  position: absolute;
  left: 55px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border);
}
.tour-item {
  display: flex;
  align-items: center;
  position: relative;
  margin-bottom: 20px;
}
.tour-item:last-child { margin-bottom: 0; }
.tour-time {
  position: absolute;
  left: -80px;
  width: 48px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  text-align: right;
}
.tour-dot {
  position: absolute;
  left: -22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid #fff;
  box-shadow: 0 0 0 3px rgba(10,61,124,0.15);
  z-index: 1;
}
.tour-content {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

/* ---------- Article Cards ---------- */
.article-list { display: grid; grid-template-columns: 1fr; gap: 16px; }
.article-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.article-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.article-card h3 { font-size: 1rem; margin-bottom: 8px; }
.article-card p { font-size: 0.85rem; color: var(--text-light); }

/* ---------- Counter Row (replaces inline grid) ---------- */
.counter-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ---------- Product Specs Grid ---------- */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 8px;
}
.specs-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 8px;
}

/* ---------- OEM Advantages Grid ---------- */
.oem-adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* ---------- Applications Grid ---------- */
.app-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

/* ---------- Science Overview Grid ---------- */
.sci-overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

/* ---------- Contact Cards Grid ---------- */
.contact-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

/* ---------- Location Cards Grid ---------- */
.location-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  margin-top: 32px;
}

/* ---------- About Qualifications Grid ---------- */
.about-qual-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* ---------- Homepage News Featured Grid ---------- */
.news-featured-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.news-featured-right {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-featured-right .news-card-v2 {
  display: grid;
  grid-template-columns: 140px 1fr;
  overflow: hidden;
}
.news-featured-right .news-card-img {
  height: auto;
  min-height: 100px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .product-category-grid { grid-template-columns: repeat(2, 1fr); }
  .product-category-card { aspect-ratio: 16 / 10; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-split { grid-template-columns: 1fr; }
  .about-split-content { padding: 40px 24px; }
  .news-grid-3 { grid-template-columns: 1fr 1fr; }
  .news-featured-grid { grid-template-columns: 1fr; }
  .news-featured-right .news-card-v2 { grid-template-columns: 120px 1fr; }
  .coop-cards-home { grid-template-columns: repeat(2, 1fr); }
  .specs-grid { grid-template-columns: repeat(3, 1fr); }
  .specs-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .oem-adv-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .sci-overview-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards-grid { grid-template-columns: repeat(2, 1fr); }
  .location-cards-grid { grid-template-columns: 1fr; }
  .about-qual-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .empower-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .counter-row { grid-template-columns: repeat(3, 1fr); }
  .coop-detail-grid { grid-template-columns: repeat(2, 1fr); }
  .coop-cards { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  :root { --nav-height: 60px; }
  html { font-size: 15px; }
  body { line-height: 1.6; }
  
  .menu-toggle { display: flex; }
  .nav-list {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
  }
  .nav-list.open { display: flex; }
  .nav-list a { padding: 12px 16px; font-size: 1rem; border-bottom: 1px solid var(--border); }
  .nav-list a:last-child { border-bottom: none; }
  .nav-hotline { display: none; }
  
  /* Hero */
  .hero-slide-content h1 { font-size: 1.6rem; }
  .hero-slide-content { padding-left: 20px; padding-right: 20px; max-width: 100%; }
  .hero-desc { font-size: 0.9rem; }
  .hero-btns { flex-direction: column; gap: 8px; }
  .hero-btns .btn { width: 100%; }
  .hero-banner { min-height: 500px; }
  .scroll-hint { display: none; }
  
  /* Section */
  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }
  .section-subtitle { font-size: 0.9rem; margin-bottom: 28px; }
  
  /* Counter */
  .counter-row { grid-template-columns: 1fr; }
  .counter-card { border-right: none !important; border-bottom: 1px solid var(--border); padding: 24px 16px; }
  .counter-card:last-child { border-bottom: none; }
  .counter-num { font-size: 2rem; }
  .counter-num .unit { font-size: 1rem; }
  
  /* Product category */
  .product-category-grid { grid-template-columns: 1fr; }
  .product-category-card { aspect-ratio: 8 / 10; }
  .product-category-card .card-content { padding: 20px 16px; }
  .product-category-card .card-content h3 { font-size: 1.1rem; }
  .product-category-card .card-content p { -webkit-line-clamp: 2; }
  
  /* About */
  .about-split { grid-template-columns: 1fr; }
  .about-split-content { padding: 32px 16px; }
  .about-split-content h2 { font-size: 1.4rem; }
  .about-split-img { min-height: 240px; }
  .data-inline { gap: 16px; flex-wrap: wrap; }
  .data-inline-item { flex: 1 1 45%; }
  .data-inline-num { font-size: 1.5rem; }
  
  /* Advantages */
  .advantage-grid { grid-template-columns: 1fr; gap: 16px; }
  .advantage-item { padding: 24px 20px; }
  .advantage-icon { width: 44px; height: 44px; }
  
  /* Coop cards */
  .coop-cards { grid-template-columns: 1fr; gap: 16px; }
  .coop-cards-home { grid-template-columns: 1fr; }
  .coop-card { padding: 24px 20px; }
  .coop-card h3 { font-size: 1.05rem; }
  
  /* News */
  .news-grid-3 { grid-template-columns: 1fr; gap: 16px; }
  .news-card-img { height: 180px; }
  .news-card-body { padding: 16px; }
  .news-card-body h3 { font-size: 0.95rem; }
  .news-featured-grid { grid-template-columns: 1fr; }
  .news-featured-right .news-card-v2 { grid-template-columns: 1fr; }
  .news-featured-right .news-card-img { height: 140px; min-height: 140px; }
  
  /* Trust */
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .trust-item { padding: 16px; }
  .trust-item h4 { font-size: 0.8rem; }
  .about-qual-grid { grid-template-columns: repeat(2, 1fr); }
  
  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer { padding: 40px 0 20px; }
  .footer-hotline { font-size: 1.2rem; }
  .footer-cert { display: none; }
  
  /* Right sidebar */
  .right-sidebar { display: none; }
  
  /* Page banner */
  .page-banner { padding: 50px 0 40px; }
  .page-banner-content h1 { font-size: 1.6rem; }
  .page-banner-content p { font-size: 0.9rem; }
  
  /* Location */
  .location-cards-grid { grid-template-columns: 1fr; gap: 20px; }
  .location-card-header { padding: 20px 16px; }
  .location-card-body { padding: 16px; }
  .info-row { flex-direction: column; gap: 4px; }
  .info-label { width: auto; }
  
  /* Contact */
  .contact-cards-grid { grid-template-columns: 1fr; gap: 16px; }
  .contact-card { padding: 24px 16px; }
  
  /* Science */
  .sci-overview-grid { grid-template-columns: 1fr; gap: 16px; }
  
  /* Products */
  .specs-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .specs-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .specs-grid .spec-item, .specs-grid-4 .spec-item { padding: 16px; }
  .specs-grid .spec-item .spec-num, .specs-grid-4 .spec-item .spec-num { font-size: 1.3rem; }
  .oem-adv-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .app-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .app-grid .app-item { padding: 20px 16px; }
  .product-tabs { flex-wrap: wrap; gap: 6px; }
  .tab-btn { padding: 8px 16px; font-size: 0.85rem; }
  .info-table { font-size: 0.8rem; }
  .info-table th, .info-table td { padding: 6px 8px; }
  .info-table th { font-size: 0.78rem; }
  
  /* Coop detail */
  .coop-detail-grid { grid-template-columns: 1fr; gap: 16px; }
  .coop-detail-header { flex-direction: column; text-align: center; padding: 24px 20px; gap: 12px; }
  .coop-detail-icon { width: 48px; height: 48px; }
  .coop-detail-body { padding: 20px; }
  .coop-detail-section h4 { font-size: 0.85rem; }
  .coop-detail-tag { padding: 4px 12px; font-size: 0.75rem; }
  
  /* OEM flow */
  .oem-flow { flex-direction: column; gap: 8px; }
  .oem-step { width: 100%; text-align: center; }
  .oem-arrow { transform: rotate(90deg); }
  
  /* Timeline */
  .timeline::before { left: 50px; }
  .timeline-year { width: 50px; font-size: 0.9rem; padding-right: 10px; }
  .timeline-content { padding-left: 14px; }
  .timeline-content h3 { font-size: 0.95rem; }
  .timeline-content p { font-size: 0.85rem; }
  
  /* Tour */
  .tour-timeline { padding-left: 50px; }
  .tour-time { left: -50px; width: 36px; font-size: 0.72rem; }
  .tour-dot { left: -14px; }
  
  /* Empower */
  .empower-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .empower-card { padding: 20px 14px; }
  .empower-card h3 { font-size: 0.9rem; }
  .empower-card p { font-size: 0.8rem; }
  
  /* Forms */
  .form-group { margin-bottom: 14px; }
  .form-group input, .form-group select, .form-group textarea { padding: 10px 12px; font-size: 0.9rem; }
  
  /* FAQ */
  .faq-categories { gap: 6px; }
  .faq-cat-btn { padding: 6px 14px; font-size: 0.8rem; }
  .faq-question { padding: 14px 16px; font-size: 0.9rem; }
  .faq-answer-inner { padding: 0 16px 14px; font-size: 0.85rem; }
  
  /* Process */
  .process-steps { flex-direction: column; gap: 8px; }
  .process-step { justify-content: flex-start; }
  .process-step-arrow { transform: rotate(90deg); }
  
  /* Article */
  .article-card { padding: 20px 16px; }
  .article-card h3 { font-size: 0.95rem; }
  
  /* News page */
  .news-entry-header { padding: 20px 16px 12px; gap: 12px; }
  .news-entry-date { width: 56px; }
  .news-entry-date .day { font-size: 1.5rem; }
  .news-entry-title { font-size: 1rem; }
  .news-entry-summary { font-size: 0.85rem; }
  .news-entry-content { padding: 0 16px 20px; padding-top: 20px; }
  .news-entry-content p { font-size: 0.88rem; }
  
  /* Buttons */
  .btn { padding: 10px 24px; font-size: 0.9rem; }
  .btn-lg { padding: 14px 32px; font-size: 1rem; }
  .btn-sm { padding: 6px 16px; font-size: 0.8rem; }
  
  /* Container */
  .container { padding: 0 16px; }
  
  /* Breadcrumb */
  .breadcrumb { padding: 12px 0; font-size: 0.75rem; }

  /* Mobile body padding for bottom nav */
  body { padding-bottom: 56px; }
  
  /* Legal */
  .legal-content { padding: 20px 16px; }
  .legal-content h2 { font-size: 1.1rem; }
  .legal-content h3 { font-size: 0.95rem; }
  .legal-content p, .legal-content li { font-size: 0.85rem; }

  /* CTA section */
  .section-cta { padding: 40px 0; }
  .section-cta h2, .section-cta-title { font-size: 1.4rem; }
  .section-cta p { font-size: 0.9rem; }

  /* Coop form card */
  .coop-form-card { padding: 24px 16px !important; }

  /* Mobile: Hide footer grid (brand/nav/contact), keep copyright */
  .footer-grid { display: none; }

  /* Logo responsive */
  .logo-pc { display: none; }
  .logo-mobile { display: block; }

  /* Floating action bar mobile */
  .float-action-bar a { width: 42px; height: 42px; }
  .float-action-bar svg { width: 20px; height: 20px; }
}

/* ============================================
   Floating Action Bar
   ============================================ */
.float-action-bar {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  background: var(--accent);
  border-radius: 8px 0 0 8px;
  box-shadow: -2px 2px 12px rgba(0,0,0,0.15);
  overflow: hidden;
}
.float-action-bar a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.15);
  transition: var(--transition);
}
.float-action-bar a:last-child { border-bottom: none; }
.float-action-bar a:hover { background: var(--accent-light); }
.float-action-bar svg {
  width: 22px;
  height: 22px;
  stroke: #fff;
  stroke-width: 2;
  fill: none;
}

@media (min-width: 768px) {
  .section { padding: 50px 0; }
  .section-title { font-size: 2.2rem; }
}