/* ===== 鑫盛汽配 - 汽配商务硬核风 自定义样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  --c-dark: #0c1117;
  --c-nav: #0f1419;
  --c-accent: #c62828;
  --c-accent-h: #e53935;
  --c-steel: #37474f;
  --c-steel-l: #546e7a;
  --c-light: #f5f5f0;
  --c-white: #ffffff;
  --c-border: #e0e0e0;
  --c-text-d: #212121;
  --c-text-l: #e8eaed;
  --c-muted: #78909c;
  --radius: 8px;
  --shadow-card: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.14);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--c-text-d);
  background: var(--c-light);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== 导航栏 ===== */
#main-nav {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: var(--c-nav);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background 0.3s, box-shadow 0.3s;
}
#main-nav.scrolled {
  background: rgba(15,20,25,0.95);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.nav-inner {
  max-width: 1280px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 64px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800; color: var(--c-text-l);
  letter-spacing: -0.5px; text-decoration: none;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px; background: var(--c-accent);
  border-radius: 4px; display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: #fff; font-weight: 900;
}
.nav-links {
  display: flex; align-items: center; gap: 0; list-style: none;
}
.nav-links > li { position: relative; }
.nav-links > li > a {
  display: block; padding: 20px 18px; color: rgba(232,234,237,0.85);
  font-size: 15px; font-weight: 500; text-decoration: none;
  transition: color 0.2s, background 0.2s; letter-spacing: 0.3px;
}
.nav-links > li > a:hover,
.nav-links > li.active > a {
  color: #fff;
  background: rgba(198,40,40,0.15);
}
.nav-links > li.active > a::after {
  content: ''; position: absolute; bottom: 0; left: 18px; right: 18px;
  height: 2px; background: var(--c-accent);
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute; top: 100%; left: 0; min-width: 160px;
  background: var(--c-nav); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 6px 0;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.25s, transform 0.25s, visibility 0.25s;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}
.nav-links > li:hover > .dropdown-menu {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.dropdown-menu a {
  display: block; padding: 10px 18px; color: rgba(232,234,237,0.75);
  font-size: 14px; text-decoration: none; transition: all 0.2s;
}
.dropdown-menu a:hover {
  color: #fff; background: rgba(198,40,40,0.2); padding-left: 22px;
}

/* 导航右侧操作区 */
.nav-actions {
  display: flex; align-items: center; gap: 12px;
}
.nav-search-btn {
  width: 40px; height: 40px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: rgba(232,234,237,0.7); cursor: pointer; transition: all 0.2s;
  background: transparent; border: none;
}
.nav-search-btn:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav-search-btn svg { width: 18px; height: 18px; }

/* 移动端菜单按钮 */
.mobile-toggle {
  display: none; width: 40px; height: 40px;
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  cursor: pointer; background: none; border: none;
}
.mobile-toggle span {
  width: 22px; height: 2px; background: var(--c-text-l);
  transition: transform 0.3s, opacity 0.3s; border-radius: 1px;
}
.mobile-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.mobile-toggle.open span:nth-child(2) { opacity: 0; }
.mobile-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* 移动端菜单 */
.mobile-menu {
  display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0;
  background: var(--c-dark); z-index: 999;
  padding: 24px; overflow-y: auto;
}
.mobile-menu.open { display: block; animation: slideDown 0.3s; }
.mobile-menu a {
  display: block; padding: 14px 0; color: rgba(232,234,237,0.85);
  font-size: 16px; text-decoration: none; font-weight: 500;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mobile-menu .sub-toggle {
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer;
}
.mobile-menu .sub-toggle svg { width: 16px; height: 16px; transition: transform 0.2s; }
.mobile-menu .sub-toggle.open svg { transform: rotate(180deg); }
.mobile-sub {
  display: none; padding-left: 16px;
}
.mobile-sub.open { display: block; }
.mobile-sub a {
  font-size: 14px; padding: 10px 0; color: rgba(232,234,237,0.65);
}

/* ===== 搜索遮罩 ===== */
.search-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(12,17,23,0.92); z-index: 2000;
  display: none; align-items: flex-start; justify-content: center;
  padding-top: 120px;
}
.search-overlay.open { display: flex; animation: fadeIn 0.25s; }
.search-box {
  width: 90%; max-width: 640px; position: relative;
}
.search-input {
  width: 100%; padding: 16px 24px; font-size: 18px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius); color: var(--c-text-l);
  outline: none; transition: border-color 0.2s;
}
.search-input:focus { border-color: var(--c-accent); }
.search-input::placeholder { color: rgba(232,234,237,0.4); }
.search-close {
  position: absolute; top: -50px; right: 0;
  width: 40px; height: 40px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: rgba(232,234,237,0.6); cursor: pointer; background: none; border: none;
  font-size: 24px;
}
.search-close:hover { color: #fff; }
.search-results {
  margin-top: 16px; background: rgba(15,20,25,0.98);
  border-radius: var(--radius); padding: 16px;
  border: 1px solid rgba(255,255,255,0.08);
}
.search-results h4 {
  font-size: 13px; color: var(--c-muted); margin-bottom: 12px;
  font-weight: 600; letter-spacing: 1px; text-transform: uppercase;
}
.search-results a {
  display: block; padding: 10px 12px; color: rgba(232,234,237,0.75);
  font-size: 14px; text-decoration: none; border-radius: 4px;
  transition: all 0.2s;
}
.search-results a:hover { color: #fff; background: rgba(198,40,40,0.15); }

/* ===== 悬浮客服 ===== */
.floating-service {
  position: fixed; right: 16px; bottom: 120px; z-index: 800;
  display: flex; flex-direction: column; gap: 2px;
}
.float-item {
  width: 52px; height: 52px; background: var(--c-nav);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: all 0.25s; position: relative;
  border: 1px solid rgba(255,255,255,0.06);
}
.float-item:hover { background: var(--c-accent); transform: scale(1.08); }
.float-item svg { width: 20px; height: 20px; color: var(--c-text-l); }
.float-item:hover svg { color: #fff; }
.float-tip {
  position: absolute; right: 62px; top: 50%; transform: translateY(-50%);
  background: var(--c-nav); color: var(--c-text-l); padding: 10px 16px;
  border-radius: var(--radius); font-size: 13px; white-space: nowrap;
  opacity: 0; visibility: hidden; transition: all 0.25s;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.float-item:hover .float-tip { opacity: 1; visibility: visible; }
.wechat-popup {
  position: absolute; right: 62px; top: 50%; transform: translateY(-50%);
  background: var(--c-nav); padding: 16px; border-radius: var(--radius);
  opacity: 0; visibility: hidden; transition: all 0.25s;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  text-align: center;
}
.float-item:hover .wechat-popup { opacity: 1; visibility: visible; }
.wechat-popup .qr-placeholder {
  width: 120px; height: 120px; background: rgba(255,255,255,0.06);
  border-radius: 4px; display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 12px; margin-bottom: 8px;
  border: 1px dashed rgba(255,255,255,0.15);
}
.wechat-popup p { color: var(--c-text-l); font-size: 13px; }

/* ===== 页脚 ===== */
#main-footer {
  background: var(--c-dark); padding: 48px 24px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-inner {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px;
}
.footer-col h5 {
  font-size: 20px; font-weight: 700; color: var(--c-text-l);
  margin-bottom: 20px; letter-spacing: 1px;
}
.footer-col a {
  display: block; padding: 6px 0; color: rgba(232,234,237,0.55);
  font-size: 13px; text-decoration: none; transition: color 0.2s;
}
.footer-col a:hover { color: var(--c-accent-h); }
.footer-col p {
  color: rgba(232,234,237,0.55); font-size: 16px; line-height: 1.8;
}
.footer-bottom {
  max-width: 1280px; margin: 32px auto 0; padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  text-align: center; color: rgba(232,234,237,0.35); font-size: 13px;
}

/* ===== Banner区 ===== */
.page-banner {
  background: var(--c-dark); padding: 100px 24px 60px;
  text-align: center; position: relative;
}
.page-banner::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(198,40,40,0.08), transparent);
}
.page-banner h1 {
  font-size: 36px; font-weight: 800; color: var(--c-text-l);
  letter-spacing: -0.5px; margin-bottom: 12px;
}
.page-banner p {
  font-size: 15px; color: var(--c-muted);
}

/* ===== 卡片 ===== */
.card {
  background: var(--c-white); border-radius: var(--radius);
  box-shadow: var(--shadow-card); transition: transform 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card-img {
  width: 100%; aspect-ratio: 4/3; background: var(--c-light);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 14px;
  border-bottom: 1px solid var(--c-border);
}
.card-body { padding: 20px; }
.card-body h3 { font-size: 17px; font-weight: 700; color: var(--c-text-d); margin-bottom: 8px; }
.card-body p { font-size: 16px; color: #666; line-height: 1.6; }
.card-tag {
  display: inline-block; padding: 4px 12px;
  background: rgba(198,40,40,0.08); color: var(--c-accent);
  font-size: 12px; font-weight: 600; border-radius: 4px;
  margin-bottom: 12px;
}

/* ===== Hero 轮播 ===== */
.hero-carousel {
  position: relative; min-height: 540px;
  display: flex; align-items: center; overflow: hidden;
}
.carousel-track {
  position: relative; width: 100%; min-height: 540px;
}
.carousel-slide {
  position: absolute; inset: 0;
  display: flex; align-items: center;
  background-size: cover; background-position: center;
  background-blend-mode: multiply;
  opacity: 0; visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s;
  height: 540px;
}
.carousel-slide.active {
  opacity: 1; visibility: visible;
  position: relative;
}
.carousel-slide::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(198,40,40,0.12), transparent 70%);
}
.carousel-slide::after {
  content: ''; position: absolute; right: -10%; top: -20%;
  width: 500px; height: 500px; border-radius: 50%;
  background: rgba(198,40,40,0.04);
}
.hero-content {
  max-width: 1280px; margin: 0 auto; padding: 0 24px;
  position: relative; z-index: 2;
}
.hero-content h1 {
  margin-top: 100px;
  font-size: 52px; font-weight: 900; color: var(--c-text-l);
  letter-spacing: -1px; line-height: 1.2; margin-bottom: 20px;
}
.hero-content h1 .accent { color: var(--c-accent-h); }
.hero-content p {
  font-size: 17px; color: rgba(232,234,237,0.6); max-width: 540px;
  line-height: 1.8; margin-bottom: 32px;
}
.hero-btns { display: flex; gap: 16px; }

/* 轮播箭头 */
.carousel-arrow {
  position: absolute; top: 50%; z-index: 10;
  width: 48px; height: 48px;
  background: rgba(15,20,25,0.6); border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 0.25s, transform 0.25s;
}
.carousel-arrow svg { width: 20px; height: 20px; color: rgba(232,234,237,0.7); }
.carousel-arrow:hover { background: var(--c-accent); transform: translateY(-50%) scale(1.05); }
.carousel-arrow:hover svg { color: #fff; }
.carousel-prev { left: 24px; transform: translateY(-50%); }
.carousel-next { right: 24px; transform: translateY(-50%); }

/* 轮播指示点 */
.carousel-dots {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 10; display: flex; gap: 10px;
}
.carousel-dots .dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: rgba(232,234,237,0.25); cursor: pointer;
  transition: background 0.3s, transform 0.3s;
}
.carousel-dots .dot:hover { background: rgba(232,234,237,0.5); }
.carousel-dots .dot.active {
  background: var(--c-accent-h); transform: scale(1.2);
}
.btn-primary {
  padding: 12px 32px; background: var(--c-accent); color: #fff;
  font-size: 15px; font-weight: 600; border-radius: var(--radius);
  text-decoration: none; transition: background 0.2s, transform 0.2s;
  border: none; cursor: pointer;
}
.btn-primary:hover { background: var(--c-accent-h); transform: translateY(-1px); }
.btn-outline {
  padding: 12px 32px; background: transparent; color: var(--c-text-l);
  font-size: 15px; font-weight: 600; border-radius: var(--radius);
  text-decoration: none; border: 1px solid rgba(255,255,255,0.15);
  transition: all 0.2s; cursor: pointer;
}
.btn-outline:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.3); }

/* ===== 区段 ===== */
.section-dark { background: var(--c-dark); }
.section-light { background: var(--c-light); }
.section-white { background: var(--c-white); }
.section-inner {
  max-width: 1280px; margin: 0 auto; padding: 80px 24px;
}
.section-head {
  margin-bottom: 48px; text-align: center;
}
.section-head h2 {
  font-size: 32px; font-weight: 800; letter-spacing: -0.5px;
  margin-bottom: 12px;
}
.section-head .line {
  width: 40px; height: 3px; background: var(--c-accent);
  border-radius: 2px; margin: 0 auto 16px;
}
.section-head p { font-size: 15px; color: #666; max-width: 540px; margin-left: auto; margin-right: auto; }
.section-dark .section-head h2 { color: var(--c-text-l); }
.section-dark .section-head p { color: var(--c-muted); }

/* ===== 优势项 ===== */
.adv-item {
  text-align: center; padding: 32px 24px;
}
.adv-icon {
  width: 56px; height: 56px; margin: 0 auto 16px;
  background: rgba(198,40,40,0.08); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
}
.adv-icon svg { width: 28px; height: 28px; color: var(--c-accent); }
.adv-item h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.adv-item p { font-size: 14px; color: #666; line-height: 1.6; }
.section-dark .adv-item h4 { color: var(--c-text-l); }
.section-dark .adv-item p { color: var(--c-muted); }
.section-dark .adv-icon { background: rgba(198,40,40,0.12); }

/* ===== 新闻卡片 ===== */
.news-card {
  display: flex; gap: 20px; background: var(--c-white);
  border-radius: var(--radius); box-shadow: var(--shadow-card);
  padding: 24px; transition: transform 0.3s, box-shadow 0.3s;
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.news-thumb {
  width: 200px; height: 140px; background: var(--c-light);
  border-radius: 6px; display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 13px; flex-shrink: 0;
  border: 1px solid var(--c-border);
}
.news-body { flex: 1; }
.news-body h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.news-meta { font-size: 13px; color: #999; margin-bottom: 12px; }
.news-body p { font-size: 14px; color: #666; line-height: 1.6; }

/* ===== 分类筛选 ===== */
.filter-tabs {
  display: flex; gap: 8px; margin-bottom: 32px; flex-wrap: wrap;
  justify-content: center;
}
.filter-tab {
  padding: 8px 20px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; cursor: pointer;
  background: var(--c-white); color: #666; border: 1px solid var(--c-border);
  transition: all 0.2s; text-decoration: none;
}
.filter-tab:hover { border-color: var(--c-accent); color: var(--c-accent); }
.filter-tab.active {
  background: var(--c-accent); color: #fff; border-color: var(--c-accent);
}

/* ===== 详情页 ===== */
.detail-section {
  max-width: 1280px; margin: 0 auto; padding: 40px 24px;
}
.detail-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.detail-img {
  aspect-ratio: 4/3; background: var(--c-light);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 16px; border: 1px solid var(--c-border);
}
.detail-info h2 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.detail-info .cat-badge {
  display: inline-block; padding: 4px 12px;
  background: rgba(198,40,40,0.08); color: var(--c-accent);
  font-size: 12px; font-weight: 600; border-radius: 4px; margin-bottom: 20px;
}
.detail-info p { font-size: 15px; color: #555; line-height: 1.8; margin-bottom: 24px; }
.spec-table {
  width: 100%; border-collapse: collapse;
}
.spec-table th {
  background: var(--c-dark); color: var(--c-text-l);
  padding: 12px 16px; font-size: 13px; font-weight: 600;
  text-align: left;
}
.spec-table td {
  padding: 10px 16px; font-size: 14px; border-bottom: 1px solid var(--c-border);
}
.spec-table tr:nth-child(even) td { background: rgba(0,0,0,0.02); }

/* ===== 联系表单 ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 14px; font-weight: 600;
  margin-bottom: 8px; color: var(--c-text-d);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--c-border);
  border-radius: var(--radius); font-size: 14px;
  background: var(--c-white); transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--c-accent); }
.form-group textarea { min-height: 120px; resize: vertical; }
.contact-info-item {
  display: flex; gap: 16px; padding: 16px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon {
  width: 40px; height: 40px; background: rgba(198,40,40,0.08);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-info-icon svg { width: 18px; height: 18px; color: var(--c-accent); }
.contact-info-text h4 { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.contact-info-text p { font-size: 14px; color: #666; }
.map-placeholder {
  width: 100%; height: 300px; background: var(--c-light);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 14px; border: 1px solid var(--c-border);
  margin-top: 32px;
}

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s, transform 0.6s;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== 原生布局类（替代Tailwind） ===== */

/* 网格 */
.g-2 { display: grid; grid-template-columns: 1fr; gap: 24px; }
.g-3 { display: grid; grid-template-columns: 1fr; gap: 24px; }
.g-4 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.g-gap-lg { gap: 40px; }
.g-products { display: grid; grid-template-columns: 1fr; gap: 24px; }

@media (min-width: 640px) {
  .g-2 { grid-template-columns: 1fr 1fr; }
  .g-3 { grid-template-columns: 1fr 1fr; }
  .g-products { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 768px) {
  .g-3 { grid-template-columns: 1fr 1fr 1fr; }
  .g-4 { grid-template-columns: repeat(4, 1fr); }
  .g-products { grid-template-columns: 1fr 1fr 1fr; }
}
@media (min-width: 1024px) {
  .g-products { grid-template-columns: 1fr 1fr 1fr 1fr; }
}

/* 图片占位 */
.img-placeholder {
   border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-muted); font-size: 14px;

}
.img-placeholder--tall { aspect-ratio: auto; min-height: 300px; }

/* 数据卡片 */
.stat-card {
  text-align: center; padding: 24px;
  background: var(--c-white); border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.stat-num { font-size: 30px; font-weight: 900; color: var(--c-accent); margin-bottom: 8px; }
.stat-label { font-size: 14px; color: #666; font-weight: 600; }

/* 文本 */
.txt-body { font-size: 16px; color: #555; line-height: 1.8; margin-bottom: 24px; }
.txt-sm { font-size: 14px; }
.txt-sm-gray { font-size: 14px; color: #666; }
.txt-muted { font-size: 13px; color: #999; }
.text-center { text-align: center; }

/* 荣誉卡片 */
.honor-card {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius); padding: 32px; text-align: center;
}
.honor-icon { font-size: 40px; margin-bottom: 12px; }
.honor-title { font-size: 18px; font-weight: 700; color: var(--c-text-l); margin-bottom: 12px; }
.honor-desc { font-size: 14px; color: var(--c-muted); }

/* 时间线 */
.timeline { position: relative; padding-left: 48px; }
.timeline::before {
  content: ''; position: absolute; left: 15px; top: 0; bottom: 0;
  width: 2px; background: var(--c-border);
}
@media (min-width: 768px) {
  .timeline { padding-left: 0; }
  .timeline::before { left: 50%; transform: translateX(-50%); }
}
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-dot {
  position: absolute; left: -48px; top: 0; width: 32px; height: 32px;
  background: var(--c-accent); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 12px; font-weight: 700;
}
@media (min-width: 768px) {
  .timeline-dot { left: 50%; transform: translateX(-50%); }
  .timeline-item { width: 50%; }
  .timeline-item:nth-child(odd) { margin-right: auto; text-align: right; padding-right: 24px; }
  .timeline-item:nth-child(odd) .timeline-dot { left: auto; right: -16px; transform: none; }
  .timeline-item:nth-child(even) { margin-left: auto; padding-left: 24px; }
  .timeline-item:nth-child(even) .timeline-dot { left: -16px; }
}
.timeline-card {
  background: var(--c-white); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: 24px; max-width: 400px;
}
.timeline-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.timeline-card p { font-size: 14px; color: #666; }

/* 详情特性 */
.detail-features { display: flex; flex-direction: column; gap: 12px; margin-bottom: 24px; }
.feature-item { display: flex; align-items: center; gap: 8px; }
.dot-accent { display: inline-block; width: 8px; height: 8px; background: var(--c-accent); border-radius: 50%; }

/* 新闻列表间距 */
.news-list { display: flex; flex-direction: column; gap: 24px; }

/* 文章排版 */
.article-body { max-width: 800px; margin: 0 auto; padding: 40px 24px; }
.article-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.article-content { color: #555; line-height: 1.8; }
.article-content p { margin-bottom: 16px; }
.article-footer { margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--c-border); }
.related-section { max-width: 1280px; margin: 0 auto; padding: 0 24px 40px; }

/* 表单标题 */
.form-title { font-size: 18px; font-weight: 700; margin-bottom: 24px; }

/* 技术实力页面 */
.tech-item {
  background: var(--c-white); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: 32px; transition: transform 0.3s, box-shadow 0.3s;
}
.tech-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.tech-item h4 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.tech-item p { font-size: 14px; color: #666; line-height: 1.6; }
.tech-icon { width: 56px; height: 56px; background: rgba(198,40,40,0.08); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.tech-icon svg { width: 28px; height: 28px; color: var(--c-accent); }
.tech-data { font-size: 28px; font-weight: 900; color: var(--c-accent); margin-bottom: 8px; }
.tech-data-label { font-size: 14px; color: #666; font-weight: 600; }
.cert-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; background: rgba(198,40,40,0.08);
  border-radius: var(--radius); font-size: 14px; font-weight: 600;
  color: var(--c-accent); margin: 4px;
}

/* 人才招聘页面 */
.job-card {
  background: var(--c-white); border-radius: var(--radius);
  box-shadow: var(--shadow-card); padding: 24px; transition: transform 0.3s, box-shadow 0.3s;
  cursor: pointer;
}
.job-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.job-title { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.job-meta { font-size: 13px; color: #999; margin-bottom: 12px; }
.job-desc { font-size: 14px; color: #666; line-height: 1.6; }
.job-tag {
  display: inline-block; padding: 4px 12px;
  background: rgba(198,40,40,0.08); color: var(--c-accent);
  font-size: 12px; font-weight: 600; border-radius: 4px; margin-right: 4px;
}
.benefit-item {
  display: flex; align-items: center; gap: 16px; padding: 16px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
}
.benefit-item:last-child { border-bottom: none; }
.benefit-icon {
  width: 44px; height: 44px; background: rgba(198,40,40,0.08);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.benefit-icon svg { width: 22px; height: 22px; color: var(--c-accent); }
.benefit-text h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.benefit-text p { font-size: 14px; color: #666; }

/* ===== 动画关键帧 ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .hero-content h1 { font-size: 42px; }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .nav-search-btn { display: none; }
  .mobile-toggle { display: flex; }
  .hero-carousel { min-height: 420px; }
  .carousel-track { min-height: 420px; }
  .hero-content h1 { font-size: 32px; }
  .hero-content p { font-size: 15px; }
  .hero-btns { flex-direction: column; }
  .page-banner h1 { font-size: 28px; }
  .section-head h2 { font-size: 24px; }
  .section-inner { padding: 60px 20px; }
  .detail-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 180px; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .floating-service { right: 8px; bottom: 80px; }
  .float-item { width: 44px; height: 44px; }
  .carousel-arrow { width: 36px; height: 36px; }
  .carousel-prev { left: 12px; }
  .carousel-next { right: 12px; }
  .carousel-arrow svg { width: 16px; height: 16px; }
  .carousel-dots { bottom: 20px; }
  .carousel-dots .dot { width: 10px; height: 10px; }
  .filter-tabs { gap: 6px; }
  .filter-tab { padding: 6px 14px; font-size: 13px; }
}

@media (max-width: 360px) {
  .hero-content h1 { font-size: 26px; }
  .hero-btns .btn-primary, .hero-btns .btn-outline { padding: 10px 24px; font-size: 14px; }
  .page-banner { padding: 80px 16px 40px; }
  .page-banner h1 { font-size: 24px; }
  .section-inner { padding: 48px 16px; }
}