/* ============================================
   北京育英网信息技术有限公司 - 企业官网样式
   设计风格参考：psylife.cc
   主色调：活力橙 + 深海蓝
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #F7931E;
  --primary-dark: #EA580C;
  --primary-light: #FB923C;
  --primary-bg: #FFF7ED;
  --secondary: #1E3A8A;
  --secondary-dark: #172554;
  --secondary-light: #3B82F6;
  --accent: #FBBF24;
  --accent-dark: #F59E0B;
  --accent-light: #FCD34D;
  --dark: #0F172A;
  --dark-blue: #1E3A8A;
  --gray-50: #F8FAFC;
  --gray-100: #F1F5F9;
  --gray-200: #E2E8F0;
  --gray-300: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-500: #64748B;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1E293B;
  --gray-900: #0F172A;
  --white: #FFFFFF;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* ---------- 重置 ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul { list-style: none; }

img { max-width: 100%; height: auto; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 20px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--gray-500);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  font-family: var(--font);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(247, 147, 30, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(247, 147, 30, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 2px 16px rgba(0,0,0,0.08);
  padding: 10px 0;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .logo {
  display: flex;
  align-items: center;
  transition: var(--transition);
}

.logo-img {
  height: 78px;
  width: auto;
  max-width: 200px;
  object-fit: contain;
  flex-shrink: 0;
  transition: var(--transition);
  image-rendering: auto;
}

.logo-text {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 2px;
  white-space: nowrap;
  transition: var(--transition);
  margin-left: 8px;
}

.navbar.scrolled .logo-text {
  color: var(--primary);
}

.navbar .logo:hover .logo-img,
.footer-brand .logo:hover .logo-img {
  transform: scale(1.05);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--gray-700);
  position: relative;
  padding: 4px 0;
  transition: var(--transition);
}

.navbar.scrolled .nav-links a {
  color: var(--gray-700);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.navbar.scrolled .nav-links a:hover,
.navbar.scrolled .nav-links a.active {
  color: var(--primary);
}

/* ---------- 级联下拉菜单 ---------- */
.nav-dropdown {
  position: relative;
}

.nav-dropdown .dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
}

.dropdown-arrow {
  font-size: 0.75rem;
  transition: transform 0.3s ease;
}

.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #FFFFFF;
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  padding: 8px 0;
  min-width: 170px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(4px);
}

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--gray-600) !important;
  white-space: nowrap;
  transition: var(--transition);
  border-radius: 0;
}

.dropdown-menu a::after {
  display: none !important;
}

.dropdown-menu a:hover {
  color: var(--primary) !important;
  background: var(--primary-bg);
}

/* 移动端下拉菜单 */
@media (max-width: 768px) {
  .nav-dropdown {
    width: 100%;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    padding: 0 0 0 16px;
    min-width: auto;
    display: none;
    background: transparent;
  }

  .nav-dropdown.open .dropdown-menu {
    display: block;
  }

  .dropdown-menu a {
    padding: 10px 0;
    font-size: 1rem;
  }
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: var(--transition);
}

.navbar.scrolled .menu-toggle span {
  background: var(--gray-700);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(254, 215, 170, 0.6) 0%, rgba(247, 147, 30, 0.6) 35%, rgba(234, 88, 12, 0.6) 100%);
  z-index: 1;
  pointer-events: none;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.particle {
  position: absolute;
  width: 11px;
  height: 11px;
  background: rgba(255,255,255,0.4);
  box-shadow: 0 0 10px rgba(255,255,255,0.55);
  border-radius: 50%;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
  padding-top: 0;
}

.hero-content {
  color: var(--white);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.15);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: #C2410C;
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
  box-shadow: 0 0 6px rgba(194, 65, 12, 0.5);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #fff7cc 0%, #ffe680 45%, #ffcc00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.75);
  max-width: 520px;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero 右侧展示 */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card-stack {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4/3;
}

.hero-card {
  position: absolute;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  padding: 24px;
  width: 80%;
  animation: float 6s ease-in-out infinite;
  transition: var(--transition);
}

.hero-card:hover {
  transform: translateY(-8px) scale(1.02);
  background: rgba(255,255,255,0.12);
}

.hero-card:nth-child(1) {
  top: 0;
  right: 0;
  animation-delay: 0s;
  width: 70%;
}

.hero-card:nth-child(2) {
  bottom: 0;
  left: 0;
  animation-delay: 1.5s;
  width: 75%;
}

.hero-card:nth-child(3) {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 3s;
  width: 50%;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 12px;
  overflow: hidden;
}

.hero-card-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-card-title {
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.hero-card-text {
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* Wave 分隔 */
.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  line-height: 0;
  z-index: 2;
}

.hero-wave svg {
  width: 100%;
  height: auto;
}

/* ============================================
   关于我们预览
   ============================================ */
.about-preview {
  background: var(--gray-50);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-wrap {
  position: relative;
}

.about-image-main {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
  position: relative;
}

.about-image-main .about-image-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-experience {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 24px 32px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.about-experience .number {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
}

.about-experience .label {
  font-size: 0.875rem;
  opacity: 0.85;
  margin-top: 4px;
}

.about-text .section-tag {
  margin-bottom: 12px;
}

.about-text .section-title {
  font-size: 2rem;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.about-stat {
  text-align: center;
  padding: 20px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.about-stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.about-stat .number {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.about-stat .label {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: 6px;
}

/* ============================================
   产品服务
   ============================================ */
.products {
  background: var(--white);
}

/* ---------- 产品分类板块（首页） ---------- */
.product-category-block {
  margin-bottom: 48px;
  background: var(--primary-bg);
  border-radius: var(--radius-xl);
  padding: 40px;
  transition: var(--transition);
}

.product-category-block:hover {
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

.cat-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.cat-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.3;
  line-height: 1;
}

.cat-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--gray-900);
}

.cat-desc {
  color: var(--gray-500);
  font-size: 0.9rem;
  margin-left: auto;
  align-self: center;
}

.cat-products {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.cat-product-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.cat-product-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 4px 16px rgba(247,147,30,0.12);
  transform: translateY(-2px);
}

/* 带图片的产品卡片：左文字70% + 右图片30% */
.cat-product-card--with-img {
  display: flex;
  align-items: center;
  gap: 16px;
}

.cat-product-card--with-img .cat-product-card__text {
  flex: 1;
  min-width: 0;
}

.cat-product-card--with-img .cat-product-card__img {
  width: 30%;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

@media (max-width: 640px) {
  .cat-product-card--with-img {
    flex-direction: column;
  }
  .cat-product-card--with-img .cat-product-card__img {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }
}

.cat-product-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.cat-product-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.6;
  margin-bottom: 12px;
}

.cat-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

.cat-link:hover {
  color: var(--primary-dark);
}

.view-all {
  text-align: center;
  margin-top: 20px;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 12px 32px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 100px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
}

.btn-outline:hover {
  background: var(--primary);
  color: #FFFFFF;
}

@media (max-width: 768px) {
  .product-category-block {
    padding: 24px;
  }

  .cat-header {
    flex-direction: column;
    gap: 6px;
  }

  .cat-desc {
    margin-left: 0;
  }

  .cat-products {
    grid-template-columns: 1fr;
  }
}

/* ---------- 原有产品卡片（保留用于 products.html） ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-100);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.product-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.product-icon.blue { background: var(--primary-bg); }
.product-icon.green { background: #FFF7ED; }
.product-icon.amber { background: #FEF3C7; }
.product-icon.purple { background: #FEF3C7; }
.product-icon.rose { background: #FFF7ED; }
.product-icon.cyan { background: #FFEDD5; }

.product-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--gray-900);
}

.product-card p {
  color: var(--gray-500);
  line-height: 1.7;
  font-size: 0.95rem;
}

.product-card .learn-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
}

.product-card .learn-more svg {
  transition: var(--transition);
}

.product-card:hover .learn-more svg {
  transform: translateX(4px);
}

/* ============================================
   重点项目
   ============================================ */
.projects-preview {
  background: var(--gray-50);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.project-image {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
}

.project-image .project-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: relative;
  z-index: 1;
}

.project-image.gradient-blue {
  background: linear-gradient(135deg, #F7931E, #EA580C);
}
.project-image.gradient-green {
  background: linear-gradient(135deg, #1E3A8A, #172554);
}
.project-image.gradient-purple {
  background: linear-gradient(135deg, #7C3AED, #6D28D9);
}

.project-image .overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  z-index: 2;
}

.project-card:hover .overlay {
  opacity: 1;
}

.project-image .overlay span {
  color: white;
  font-weight: 600;
  padding: 8px 20px;
  border: 2px solid rgba(255,255,255,0.6);
  border-radius: 50px;
  font-size: 0.875rem;
}

.project-body {
  padding: 24px;
}

.project-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--gray-900);
}

.project-body p {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.project-tag {
  padding: 4px 12px;
  background: var(--primary-bg);
  color: var(--primary);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ============================================
   优势与特点
   ============================================ */
.features {
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-item {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius);
  transition: var(--transition);
  background: var(--gray-50);
}

.feature-item:hover {
  background: var(--primary-bg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
}

.feature-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--gray-900);
}

.feature-item p {
  color: var(--gray-500);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* ============================================
   CTA 区域
   ============================================ */
.cta {
  background: linear-gradient(135deg, #FED7AA 0%, #F7931E 60%, #EA580C 100%);
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(247,147,30,0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(30,58,138,0.1) 0%, transparent 50%);
}

.cta .container {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
}

.cta-desc {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto 36px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: #FFFFFF;
  color: var(--gray-500);
  padding: 60px 0 0;
  border-top: 1px solid var(--gray-200);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--gray-200);
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  margin-bottom: 16px;
}

.footer-brand .logo-img {
  height: 78px;
  max-width: 360px;
}

.footer-brand .logo-text {
  color: var(--primary);
  font-size: 1.8rem;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer h4 {
  color: var(--gray-900);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links a {
  display: block;
  color: var(--gray-500);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  margin-bottom: 12px;
  white-space: nowrap;
}

.footer-contact-icon {
  width: 18px;
  height: 18px;
  object-fit: contain;
  flex-shrink: 0;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-500);
}

.footer-beian {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-beian a {
  color: var(--gray-500);
  text-decoration: none;
  font-size: 0.82rem;
  transition: var(--transition);
}

.footer-beian a:hover {
  color: var(--primary-light);
}

/* ============================================
   合作伙伴页面
   ============================================ */
.partners-intro {
  padding: 80px 0;
  background: #FFFFFF;
}

.partners-intro .container {
  max-width: 900px;
}

.partners-intro-content h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 24px;
}

.partners-intro-content p {
  color: var(--gray-600);
  line-height: 1.9;
  font-size: 1rem;
}

.partners-section {
  padding: 20px 0 80px;
  background: var(--gray-50);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.partners-grid--5 {
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.partners-grid--4 {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.partners-grid--8 {
  grid-template-columns: repeat(8, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.partners-grid--8 .partner-logo {
  width: 80px;
  height: 80px;
  border-radius: 14px;
  margin-bottom: 12px;
}

.partners-grid--8 .partner-card {
  padding: 14px 10px;
}

.partner-card--name {
  padding: 24px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.partner-card--name h4 {
  margin-bottom: 0;
  font-size: 1.1rem;
}

.partner-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.partner-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.partner-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.partner-card:hover::after {
  opacity: 1;
}

.partner-logo {
  width: 120px;
  height: 120px;
  border-radius: 20px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.partner-card:hover .partner-logo {
  transform: scale(1.08);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}

.partner-logo-text {
  color: #FFFFFF;
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.partner-logo--img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.partner-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.partner-card p {
  color: var(--gray-600);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* 品牌列表 */
.partners-brand-section {
  padding: 80px 0;
  background: #FFFFFF;
}

.brand-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  max-width: 1100px;
  margin: 60px auto 0;
}

.brand-item {
  flex: 0 0 calc((100% - 7 * 16px) / 8);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 18px 10px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--gray-700);
  text-align: center;
  transition: var(--transition);
  cursor: default;
}

.brand-item:hover {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(247, 147, 30, 0.15);
}

@media (max-width: 900px) {
  .brand-item { flex: 0 0 calc((100% - 3 * 16px) / 4); }
}

@media (max-width: 480px) {
  .brand-item { flex: 0 0 calc((100% - 1 * 16px) / 2); }
}

/* 合作优势 */
.partners-benefits {
  padding: 80px 0;
  background: var(--gray-50);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.benefit-card {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.benefit-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}

.benefit-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--primary);
  transition: var(--transition);
  overflow: hidden;
}

.benefit-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.benefit-card:hover .benefit-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #FFFFFF;
  transform: scale(1.1) rotate(-5deg);
}

.benefit-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.benefit-card p {
  color: var(--gray-600);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* 响应式 */
@media (max-width: 1024px) {
  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .partners-grid--5 {
    grid-template-columns: repeat(3, 1fr);
  }

  .partners-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .partners-grid--8 {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (max-width: 640px) {
  .partners-intro,
  .partners-section,
  .partners-brand-section,
  .partners-benefits {
    padding: 60px 0;
  }

  .partners-grid,
  .partners-grid--5,
  .partners-grid--4 {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .partners-grid--8 {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .partner-logo {
    width: 100px;
    height: 100px;
  }

  .partner-logo-text {
    font-size: 1.2rem;
  }

  .brand-item {
    padding: 10px 20px;
    font-size: 0.9rem;
  }

  .partners-intro-content h2 {
    font-size: 1.5rem;
  }
}

/* ============================================
   子页面通用样式
   ============================================ */
.page-banner {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, #FED7AA 0%, #F7931E 35%, #EA580C 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-banner::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--white), transparent);
}

.page-banner-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--white);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.page-banner-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.breadcrumb a {
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
}

.breadcrumb span {
  color: rgba(255,255,255,0.4);
}

.breadcrumb .current {
  color: var(--white);
}

/* 临时占位内容 */
.placeholder-content {
  padding: 60px 0;
}

.placeholder-text {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px dashed var(--gray-300);
  color: var(--gray-500);
  line-height: 1.8;
}

.placeholder-text p {
  margin-bottom: 16px;
}

/* ============================================
   二级导航栏（产品页子菜单）
   ============================================ */
.subnav {
  background: #FFFFFF;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 99;
  transition: var(--transition);
}

.subnav.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.subnav .container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 0 20px;
  overflow: visible;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.subnav .container::-webkit-scrollbar {
  display: none;
}

/* ---------- 二级导航子标签（横排） ---------- */
.subnav-dropdown {
  position: relative;
}

.subnav-dropdown .subnav-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.subnav-arrow {
  font-size: 0.7rem;
  transition: transform 0.3s ease;
}

.subnav-dropdown:hover .subnav-arrow {
  transform: rotate(180deg);
}

/* 横排子标签条：从导航栏底部全宽展开 */
.subnav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(24px);
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 0;
  background: #FFFFFF;
  border-radius: 0 0 12px 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
  white-space: nowrap;
}

.subnav-dropdown:hover .subnav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(16px);
}

.subnav-dropdown-menu a {
  display: block;
  padding: 12px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-600);
  white-space: nowrap;
  transition: var(--transition);
  border-right: 1px solid var(--gray-200);
}

.subnav-dropdown-menu a:last-child {
  border-right: none;
}

.subnav-dropdown-menu a:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

/* ---------- 区域管理赋能 · 子分类产品 ---------- */
.region-subsection {
  margin-top: 56px;
  scroll-margin-top: 130px;
}

.region-subsection-header {
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}

.region-subsection-header h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 4px;
  line-height: 1.4;
}

.region-subsection-header p {
  font-size: 0.9rem;
  color: var(--gray-500);
}

.region-product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}

.region-product-grid--spaced {
  margin-top: 40px;
}

.region-product-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1px solid var(--gray-200);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.region-product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.region-product-card:hover::before {
  transform: scaleX(1);
}

.region-product-card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 8px 24px rgba(247,147,30,0.12);
  transform: translateY(-4px);
}

.region-product-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.region-product-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.region-product-card p {
  font-size: 0.875rem;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 14px;
}

.region-product-card .feature-list {
  font-size: 0.85rem;
}

.region-product-card .feature-list li {
  padding: 3px 0;
  color: var(--gray-600);
}

/* 对勾图标作为项目符号 */
.region-product-card .feature-list li.feature-bullet--check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.region-product-card .feature-list li.feature-bullet--check::before {
  content: '';
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: url('../images/duigou.png') no-repeat center/contain;
}

/* 特性列表两栏排列（每栏两条） */
.region-product-card .feature-list.feature-list--two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 24px;
}

@media (max-width: 480px) {
  .region-product-card .feature-list.feature-list--two-col {
    grid-template-columns: 1fr;
  }
}

/* ---------- 带图片的区域产品卡片（图片右上方，文字环绕） ---------- */
.region-product-card--with-image {
  /* 图片浮动在右上方，左侧文字自然环绕 */
}

.region-product-card__image {
  float: right;
  width: 48%;
  margin: 4px 0 16px 20px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--gray-200);
}

@media (max-width: 768px) {
  .region-product-card__image {
    float: none;
    width: 100%;
    margin: 0 0 16px;
  }
}

/* ---------- 带图片的区域产品卡片（图片左上方，文字环绕） ---------- */
.region-product-card__image--left {
  float: left;
  width: 48%;
  margin: 4px 20px 16px 0;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--gray-200);
}

@media (max-width: 768px) {
  .region-product-card__image--left {
    float: none;
    width: 100%;
    margin: 0 0 16px;
  }
}

/* ---------- 移动端：子菜单展开 + 产品网格适配 ---------- */
@media (max-width: 768px) {
  .subnav .container {
    overflow-x: auto;
  }

  .subnav-dropdown-menu {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    padding: 0;
    display: none;
    background: transparent;
    border-radius: 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .subnav-dropdown-menu::-webkit-scrollbar {
    display: none;
  }

  .subnav-dropdown.open .subnav-dropdown-menu {
    display: flex;
  }

  .subnav-dropdown-menu a {
    padding: 10px 14px;
    font-size: 0.85rem;
    color: var(--gray-500);
    border-right: 1px solid var(--gray-200);
    flex-shrink: 0;
  }

  .region-product-grid {
    grid-template-columns: 1fr;
  }

  .region-subsection {
    margin-top: 40px;
  }
}

.subnav-item {
  display: block;
  padding: 16px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-600);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.subnav-item:hover {
  color: var(--primary);
  background: var(--primary-bg);
}

.subnav-item.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: var(--primary-bg);
}

/* ============================================
   产品分类板块
   ============================================ */
.product-category {
  padding: 80px 0;
}

.product-category:nth-child(even) {
  background: var(--gray-50);
}

.product-category-header {
  margin-bottom: 40px;
}

.product-category-header .category-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-bg);
  border-radius: 100px;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.product-category-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.product-category-header p {
  color: var(--gray-500);
  font-size: 0.95rem;
  max-width: 600px;
}

/* 01 与标题同一行 */
.product-category-header--inline .category-title-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.product-category-header--inline .category-title-row .category-tag {
  margin-bottom: 0;
  flex-shrink: 0;
  font-size: 1.6rem;
}

.product-category-header--inline .category-title-row h2 {
  margin-bottom: 0;
}

/* ============================================
   公司简介页面
   ============================================ */
.about-company {
  padding: 20px 0;
  background: #FFFFFF;
}

.about-company .container {
  max-width: 900px;
}

.about-ip-stats {
  display: flex;
  justify-content: center;
  gap: 160px;
  margin: 0 0 36px;
}

.about-ip-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.about-ip-num {
  font-size: 3.2rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1.05;
}

.about-ip-num small {
  font-size: 1.15rem;
  font-weight: 600;
  margin-left: 3px;
}

.about-ip-label {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gray-600);
  margin-top: 6px;
}

@media (max-width: 768px) {
  .about-ip-stats {
    gap: 80px;
    flex-wrap: wrap;
  }
  .about-ip-num {
    font-size: 2.4rem;
  }
}

.about-company-content h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 32px;
  position: relative;
  padding-bottom: 16px;
}

.about-company-content h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 2px;
}

.about-company-content p {
  color: var(--gray-600);
  line-height: 1.9;
  margin-bottom: 18px;
  font-size: 1rem;
}

.about-company-content p:last-child {
  margin-bottom: 0;
}

.about-company-content h3 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--gray-900);
  margin: 40px 0 16px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  line-height: 1.5;
}

.highlight-num {
  font-weight: 600;
  color: var(--primary);
}

.product-list {
  list-style: decimal;
  padding: 0 0 0 24px;
  margin: 0 0 24px 0;
}

.product-list li {
  color: var(--gray-600);
  line-height: 1.9;
  font-size: 1rem;
  margin-bottom: 10px;
  padding: 0;
}

@media (max-width: 640px) {
  .about-company {
    padding: 16px 0;
  }

  .about-company-content h2 {
    font-size: 1.5rem;
  }

  .about-company-content h3 {
    font-size: 1.15rem;
    margin: 30px 0 14px;
  }
}
}

/* Leadership */
.leadership {
  padding: 80px 0;
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
}

/* Timeline */
.timeline {
  padding: 24px 0;
  background: var(--gray-50);
}

.timeline-wrap {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-wrap::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  padding-bottom: 40px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: 16px;
  top: 4px;
  width: 18px;
  height: 18px;
  background: var(--primary);
  border-radius: 50%;
  border: 4px solid var(--primary-bg);
}

.timeline-item .year {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.timeline-item .title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
}

.timeline-item .desc {
  color: var(--gray-500);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Culture */
.culture {
  padding: 80px 0;
}

.culture-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.culture-card {
  text-align: center;
  padding: 36px 24px;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}

.culture-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.culture-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.culture-card .icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.culture-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.culture-card p {
  color: var(--gray-500);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============================================
   我们的团队 - 照片墙
   ============================================ */
.team-gallery {
  padding: 80px 0;
  background: var(--gray-50);
}

.team-gallery .section-header {
  margin-bottom: 48px;
}

.team-photos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.team-photo-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: var(--transition);
}

/* 艺术排列：大图小图交替 */
.team-photo-item:nth-child(1) {
  grid-column: span 2;
  aspect-ratio: 2/1;
}

.team-photo-item:nth-child(3) {
  grid-column: span 1;
  aspect-ratio: 4/3;
}

.team-photo-item:nth-child(4) {
  grid-column: span 2;
  aspect-ratio: 2/1;
}

.team-photo-item:nth-child(5) {
  grid-column: 2 / 3;
}

.team-photo-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.team-photo-item:hover img {
  transform: scale(1.06);
}

.photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.65));
  padding: 50px 24px 20px;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.team-photo-item:hover .photo-overlay {
  opacity: 1;
}

.photo-overlay span {
  display: inline-block;
  color: #FFFFFF;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  backdrop-filter: blur(4px);
}

/* 照片灯箱 */
.team-photo-item.active-lightbox {
  position: fixed;
  top: 50% !important;
  left: 50% !important;
  transform: translate(-50%, -50%) !important;
  z-index: 9999;
  width: auto;
  height: auto;
  max-width: 90vw;
  max-height: 90vh;
  aspect-ratio: auto;
  border-radius: 16px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4);
  animation: lightboxIn 0.3s ease;
  grid-column: auto;
}

.team-photo-item.active-lightbox img {
  display: block;
  width: auto;
  height: auto;
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 16px;
}

.team-photo-item.active-lightbox .photo-overlay {
  opacity: 1;
}

@keyframes lightboxIn {
  from { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
  to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

.lightbox-mask {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 9998;
  cursor: pointer;
  animation: maskIn 0.3s ease;
}

@keyframes maskIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* 响应式 - 团队照片 */
@media (max-width: 1024px) {
  .team-photos {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .team-photo-item:nth-child(1),
  .team-photo-item:nth-child(4) {
    grid-column: span 2;
  }

  .team-photo-item:nth-child(3),
  .team-photo-item:nth-child(5) {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  .team-gallery {
    padding: 60px 0;
  }

  .team-photos {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .team-photo-item,
  .team-photo-item:nth-child(1),
  .team-photo-item:nth-child(3),
  .team-photo-item:nth-child(4),
  .team-photo-item:nth-child(5) {
    grid-column: span 1;
    aspect-ratio: 4/3;
  }

  .team-photo-item.active-lightbox {
    max-width: 95vw;
    max-height: 80vh;
  }

  .team-photo-item.active-lightbox img {
    max-width: 95vw;
    max-height: 80vh;
  }
}

/* ============================================
   动画 - 滚动显示
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* 延迟辅助 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ============================================
   产品页面
   ============================================ */
.products-detail {
  padding: 80px 0;
}

.product-detail-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 40px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 32px;
  border: 1px solid var(--gray-100);
  transition: var(--transition);
}

.product-detail-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.product-detail-card:nth-child(even) .product-detail-image {
  order: 2;
}

.product-detail-image {
  border-radius: var(--radius);
  background: var(--gray-50);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  overflow: hidden;
  padding: 0;
}

.product-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: left top;
  display: block;
}

.product-detail-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.product-detail-info p {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 12px;
}

.product-detail-info .feature-list {
  margin-top: 16px;
}

.product-detail-info .feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  color: var(--gray-600);
  font-size: 0.95rem;
}

.product-detail-info .feature-list li::before {
  content: '';
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  background: url('../images/check-mark.png') no-repeat center/contain;
}

/* ============================================
   重点项目页面
   ============================================ */
.projects-detail {
  padding: 10px 0 80px;
}

.project-detail-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 32px;
  transition: var(--transition);
  border: 1px solid var(--gray-100);
}

.project-detail-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.project-detail-header {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 40px;
  color: var(--white);
}

.project-detail-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.project-detail-header p {
  opacity: 0.8;
  font-size: 0.95rem;
}

.project-detail-body {
  padding: 32px 40px;
}

.project-detail-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
  margin-top: 24px;
}

.project-detail-body h4:first-child {
  margin-top: 0;
}

.project-detail-body p {
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: 12px;
}

.project-detail-body ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.project-detail-body ul li {
  color: var(--gray-600);
  line-height: 1.8;
  list-style: disc;
}

.project-detail-body ul.detail-list-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 32px;
  row-gap: 4px;
}

@media (max-width: 768px) {
  .project-detail-body ul.detail-list-2col {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   重点项目页面 - Bento Grid 艺术化排列
   ============================================ */
.projects-bento {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

/* ===== 重点项目 轮播 ===== */
.projects-carousel {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}
.projects-carousel-viewport {
  overflow: hidden;
  padding: 14px 0;
}
.projects-carousel-track {
  display: flex;
  gap: 0;
  transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.projects-carousel-track > .project-detail-card {
  flex: 0 0 100%;
  max-width: 100%;
  margin-bottom: 0;
}
/* 左右切换箭头 */
.carousel-arrow {
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  color: #EA580C;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.25s ease, color 0.25s ease;
}
.carousel-arrow:hover {
  background: #EA580C;
  color: #fff;
}
/* 底部控制栏：左箭头 + 圆点 + 右箭头 */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-top: 28px;
}
/* 圆点指示器 */
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
}
.carousel-dot {
  width: 10px;
  height: 10px;
  border: none;
  border-radius: 50%;
  background: #FCD9A8;
  cursor: pointer;
  padding: 0;
  transition: background 0.25s ease, width 0.25s ease, border-radius 0.25s ease;
}
.carousel-dot.active {
  background: #EA580C;
  width: 28px;
  border-radius: 6px;
}
@media (max-width: 640px) {
  .carousel-arrow { width: 42px; height: 42px; font-size: 24px; }
  .carousel-controls { gap: 18px; margin-top: 20px; }
}

/* 卡片基础：在 bento 容器内取消默认的 margin-bottom */
.projects-bento .project-detail-card {
  margin-bottom: 0;
  position: relative;
  overflow: hidden;
}

/* Featured 卡片横跨两列，采用左右分栏布局 */
.projects-bento .project-detail-card--featured {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 30% 70%;
  align-items: stretch;
}

/* 汕尾项目：左侧标题区占整体 30% */
.projects-bento #shanwei-edu-platform.project-detail-card--featured {
  grid-template-columns: 30% 70%;
}

.projects-bento .project-detail-card--featured .project-detail-header {
  padding: 44px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.projects-bento .project-detail-card--featured .project-detail-header h3 {
  font-size: 1.6rem;
  line-height: 1.35;
  margin-bottom: 12px;
}

.projects-bento .project-detail-card--featured .project-detail-body {
  padding: 40px 44px;
}

/* 普通卡片改为左右分栏：左侧标题区 30% + 右侧内容区 70% */
.projects-bento .project-detail-card:not(.project-detail-card--featured) {
  display: grid;
  grid-template-columns: 30% 70%;
  align-items: stretch;
}

.projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-header {
  padding: 32px 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-header h3 {
  font-size: 1.6rem;
  line-height: 1.35;
}

.projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-body {
  padding: 28px 32px 32px;
  flex: 1;
}

/* 右侧图片区域默认橙色边框 */
.projects-bento .project-detail-body {
  border: 2px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  overflow: hidden;
}

/* 分类标签 */
.project-detail-tag {
  display: inline-block;
  align-self: flex-start;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #FFFFFF;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 14px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

/* 装饰性大号编号 */
.project-detail-num {
  position: absolute;
  top: 14px;
  right: 22px;
  font-size: 4.5rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.16);
  line-height: 1;
  letter-spacing: -3px;
  pointer-events: none;
  font-family: 'Inter', -apple-system, sans-serif;
  z-index: 1;
}

.projects-bento .project-detail-card--featured .project-detail-num {
  font-size: 6rem;
  top: 18px;
  right: 28px;
}

/* 装饰几何形状 - featured header */
.projects-bento .project-detail-card--featured .project-detail-header::before,
.projects-bento .project-detail-card--featured .project-detail-header::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.projects-bento .project-detail-card--featured .project-detail-header::before {
  width: 220px;
  height: 220px;
  top: -60px;
  right: -40px;
}

.projects-bento .project-detail-card--featured .project-detail-header::after {
  width: 140px;
  height: 140px;
  bottom: -50px;
  left: -30px;
  background: rgba(255, 255, 255, 0.06);
}

/* 装饰几何形状 - 普通卡片 header */
.projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-header::before {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -60px;
  right: -40px;
  pointer-events: none;
}

/* header 内文字层级提升 */
.projects-bento .project-detail-header h3,
.projects-bento .project-detail-header p,
.projects-bento .project-detail-tag,
.projects-bento .project-detail-num {
  position: relative;
  z-index: 2;
}

.projects-bento .project-detail-header p {
  opacity: 0.88;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* hover 增强：抬升 + 渐变描边光晕 */
.projects-bento .project-detail-card {
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              border-color 0.45s ease;
}

.projects-bento .project-detail-card:hover {
  transform: none;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.14);
  border-color: var(--primary-light);
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.projects-bento .project-detail-card:hover .project-detail-header::before {
  transform: scale(1.15);
  transition: transform 0.6s ease;
}

.projects-bento .project-detail-card--featured:hover .project-detail-header::after {
  transform: scale(1.2);
  transition: transform 0.6s ease;
}

/* 悬停时仅缩放右侧图片，作为动效反馈；卡片本体不动，避免 hover 抖动 */
.projects-bento .project-detail-body img {
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.projects-bento .project-detail-card:hover .project-detail-body img {
  transform: scale(1.04);
}

/* 悬停时右侧图片区域橙色边框加粗 */
.projects-bento .project-detail-card:hover .project-detail-body {
  border-width: 3px;
}

/* 响应式：平板及移动端 */
@media (max-width: 1024px) {
  .projects-bento {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .projects-bento .project-detail-card--featured {
    grid-column: span 1;
    grid-template-columns: 1fr;
  }

  .projects-bento .project-detail-card--featured .project-detail-header {
    padding: 32px 32px 28px;
  }

  .projects-bento .project-detail-card--featured .project-detail-header h3 {
    font-size: 1.3rem;
  }

  .projects-bento .project-detail-card--featured .project-detail-body {
    padding: 28px 32px 32px;
  }

  .projects-bento .project-detail-card--featured .project-detail-num {
    font-size: 4.5rem;
    top: 14px;
    right: 22px;
  }

  /* 窄屏下普通卡片也恢复上下布局 */
  .projects-bento .project-detail-card:not(.project-detail-card--featured) {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .projects-bento .project-detail-header,
  .projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-header,
  .projects-bento .project-detail-card--featured .project-detail-header,
  .projects-bento .project-detail-body,
  .projects-bento .project-detail-card:not(.project-detail-card--featured) .project-detail-body,
  .projects-bento .project-detail-card--featured .project-detail-body {
    padding: 24px;
  }

  .project-detail-num {
    font-size: 3.2rem;
    top: 10px;
    right: 16px;
  }

  .projects-bento .project-detail-card--featured .project-detail-num {
    font-size: 3.2rem;
  }
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.75rem; }
  .products-grid,
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-title { font-size: 1.75rem; }
  .section-header { margin-bottom: 40px; }

  .menu-toggle { display: flex; }

  .logo-img { height: 60px; }

  .logo-text { font-size: 1.2rem; }

  .footer-brand .logo-img { height: 60px; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    padding: 80px 32px 32px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    transition: right 0.4s ease;
    gap: 8px;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a, .navbar.scrolled .nav-links a {
    color: var(--gray-700);
    font-size: 1.1rem;
    padding: 12px 0;
    display: block;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-title {
    font-size: 2.25rem;
  }

  .hero-visual {
    display: none;
  }

  .about-grid,
  .about-company-grid,
  .product-detail-card {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .product-detail-card {
    padding: 24px;
  }

  .product-detail-card:nth-child(even) .product-detail-image {
    order: 0;
  }

  .products-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .about-stat {
    padding: 16px 8px;
  }

  .about-stat .number {
    font-size: 1.35rem;
  }

  .about-experience {
    position: relative;
    bottom: 0;
    right: 0;
    margin-top: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .page-banner-title {
    font-size: 1.75rem;
  }

  .culture-grid {
    grid-template-columns: 1fr;
  }

  .project-detail-header,
  .project-detail-body {
    padding: 24px;
  }

  .cta-title {
    font-size: 1.75rem;
  }

  .hero-card-stack {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.75rem; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .about-stats { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
}

/* ============================================
   浮动回到顶部按钮
   ============================================ */
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #FFFFFF;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  box-shadow: 0 6px 20px rgba(30, 58, 138, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s, box-shadow 0.3s ease;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-to-top:hover {
  box-shadow: 0 8px 28px rgba(30, 58, 138, 0.45);
  transform: translateY(-3px) scale(1.05);
}

.back-to-top:active {
  transform: translateY(-1px) scale(1);
}

.back-to-top-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.back-to-top-text {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1;
}

@media (max-width: 768px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 48px;
    height: 48px;
  }

  .back-to-top-icon {
    width: 18px;
    height: 18px;
  }

  .back-to-top-text {
    font-size: 0.6rem;
  }
}