/* ========================================
   杭州集普科技有限公司 - 官方网站主样式
   技术栈: 纯CSS3 + CSS变量 (参数化设计)
   服务器: Windows Server 2016 + IIS10 + PHP8.4 + MySQL
   ======================================== */

/* ---- CSS变量 (全局参数化设计) ---- */
:root {
  /* 品牌色系 */
  --color-primary: #0057A8;       /* 主色：深蓝 */
  --color-primary-light: #1A7FD4; /* 亮蓝 */
  --color-primary-dark: #003D78;  /* 深蓝 */
  --color-accent: #FF6B1A;        /* 点缀色：橙 */
  --color-accent-light: #FF8C45;
  
  /* 中性色 */
  --color-text: #1A1A2E;
  --color-text-light: #555566;
  --color-text-muted: #8888AA;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F4F7FC;
  --color-bg-dark: #0A1628;
  --color-border: #E0E8F0;
  --color-border-light: #EEF2F8;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #0057A8 0%, #1A7FD4 100%);
  --gradient-dark: linear-gradient(135deg, #0A1628 0%, #1A3A6B 100%);
  --gradient-accent: linear-gradient(135deg, #FF6B1A 0%, #FF8C45 100%);
  --gradient-hero: linear-gradient(135deg, rgba(0,30,70,0.88) 0%, rgba(0,87,168,0.72) 100%);
  
  /* 排版 */
  --font-primary: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans CN', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.2rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 6rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,87,168,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,87,168,0.12), 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,87,168,0.16), 0 4px 16px rgba(0,0,0,0.08);
  --shadow-xl: 0 20px 60px rgba(0,87,168,0.2), 0 8px 24px rgba(0,0,0,0.1);
  --shadow-card: 0 4px 24px rgba(0,87,168,0.1);
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 布局 */
  --container-max: 1280px;
  --header-height: 80px;
  --nav-top-height: 36px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ---- 布局容器 ---- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.section {
  padding: var(--spacing-4xl) 0;
}

.section-sm {
  padding: var(--spacing-2xl) 0;
}

/* ---- 顶部信息栏 ---- */
.top-bar {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  font-size: var(--font-size-xs);
  height: var(--nav-top-height);
  display: flex;
  align-items: center;
  position: relative;
  z-index: 200;
}

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

.top-bar-left {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.top-bar-left span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.top-bar-left .icon {
  width: 14px;
  height: 14px;
  opacity: 0.7;
}

.top-bar-right {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.top-bar-right a {
  color: rgba(255,255,255,0.65);
  transition: color var(--transition-fast);
  font-size: var(--font-size-xs);
}

.top-bar-right a:hover {
  color: #fff;
}

.lang-switch {
  display: flex;
  gap: 6px;
}

.lang-switch a {
  padding: 2px 8px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  font-size: 11px;
  transition: all var(--transition-fast);
}

.lang-switch a:hover, .lang-switch a.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ---- 导航栏 ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  height: var(--header-height);
  box-shadow: 0 1px 0 var(--color-border), var(--shadow-sm);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Logo */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.navbar-brand img {
  height: 48px;
  width: auto;
}

.brand-name-inline {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-primary-dark);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* 导航菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
}

.nav-menu ul {
  display: flex;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
  height: 100%;
}

.nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 var(--spacing-lg);
  height: 100%;
  font-size: 1.05rem;
  font-weight: 700;
  color: #1a1a2e;
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.nav-item:hover .nav-link,
.nav-item.active .nav-link {
  color: var(--color-primary);
}

.nav-item:hover .nav-link::after,
.nav-item.active .nav-link::after {
  transform: scaleX(1);
}

.nav-arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-base);
}

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

/* 下拉菜单 */
.dropdown {
  position: absolute;
  top: calc(100% + 0px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border-light);
  min-width: 200px;
  padding: var(--spacing-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  pointer-events: none;
}

.dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: #fff;
  border-top: 1px solid var(--color-border-light);
  border-left: 1px solid var(--color-border-light);
  transform: translateX(-50%) rotate(45deg);
}

.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  padding-left: calc(var(--spacing-md) + 4px);
}

.dropdown-item .dot {
  width: 6px;
  height: 6px;
  background: var(--color-border);
  border-radius: 50%;
  flex-shrink: 0;
  transition: background var(--transition-fast);
}

.dropdown-item:hover .dot {
  background: var(--color-primary);
}

/* 导航栏 Logo */
.navbar-logo-icon {
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  background: linear-gradient(135deg, #0057A8, #1A7FD4);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  flex-shrink: 0;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

/* 导航栏搜索框 */
.navbar-search {
  display: flex;
  align-items: center;
  margin-left: 16px;
  flex-shrink: 0;
}
.navbar-search form {
  display: flex;
  align-items: center;
  border: 1.5px solid #e0e4ea;
  border-radius: 25px;
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}
.navbar-search form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,87,168,.1);
}
.navbar-search-input {
  border: none;
  outline: none;
  background: transparent;
  padding: 7px 0 7px 14px;
  font-size: .85rem;
  width: 140px;
  color: var(--color-text);
}
.navbar-search-input::placeholder { color: #aaa; }
.navbar-search-btn {
  border: none;
  background: none;
  padding: 6px 10px 6px 0;
  cursor: pointer;
  color: #999;
  display: flex;
  align-items: center;
}
.navbar-search-btn svg { width: 16px; height: 16px; }
.navbar-search-btn:hover { color: var(--color-primary); }

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition-base);
}

/* ---- 英雄区（轮播Banner） ---- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 800px;
  overflow: hidden;
  background: var(--color-bg-dark);
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .8s ease, visibility 0s .8s;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
  transition: opacity .8s ease, visibility 0s;
}

.hero-slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-slide.active .hero-slide-bg {
  transform: scale(1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: center;
}

.hero-content .container {
  width: 100%;
}

.hero-text {
  max-width: 640px;
  color: #fff;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.8s ease forwards;
}

.hero-tag .dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2rem, 4vw, var(--font-size-5xl));
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.8s 0.1s ease both;
}

.hero-title span {
  background: linear-gradient(135deg, #7BC8FF, #FFFFFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.6;
  animation: fadeInUp 0.8s 0.2s ease both;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.3s ease both;
}

/* 轮播控制 */
.hero-controls {
  position: absolute;
  bottom: var(--spacing-2xl);
  right: var(--spacing-2xl);
  z-index: 10;
  display: flex;
  gap: var(--spacing-sm);
}

.hero-dots {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
  z-index: 10;
}

.hero-dot {
  width: 8px;
  height: 8px;
  background: rgba(255,255,255,0.4);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
}

.hero-dot.active {
  width: 28px;
  background: #fff;
}

.hero-btn-prev, .hero-btn-next {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-full);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(8px);
}

.hero-btn-prev:hover, .hero-btn-next:hover {
  background: rgba(255,255,255,0.25);
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: var(--spacing-xl);
  left: var(--spacing-xl);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255,255,255,0.6);
  font-size: var(--font-size-xs);
  animation: bounce 2s infinite;
}

/* ---- 按钮系统 ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1;
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::before {
  background: rgba(255,255,255,0.1);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,87,168,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,87,168,0.5);
}

.btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
  background: transparent;
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
}

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

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

.btn-accent {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,107,26,0.4);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255,107,26,0.5);
}

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-alt);
}

.btn-sm {
  padding: 8px 20px;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 16px 40px;
  font-size: var(--font-size-base);
}

.btn-icon {
  width: 20px;
  height: 20px;
}

/* ---- 数据统计区 ---- */
.stats-bar {
  background: var(--gradient-primary);
  padding: var(--spacing-2xl) 0;
  position: relative;
  overflow: hidden;
}

.stats-bar::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 40%;
  background: linear-gradient(135deg, transparent, rgba(255,255,255,0.05));
  clip-path: polygon(20% 0, 100% 0, 100% 100%, 0% 100%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  z-index: 1;
}

.stat-item {
  padding: var(--spacing-lg) var(--spacing-xl);
  text-align: center;
  color: #fff;
  border-right: 1px solid rgba(255,255,255,0.15);
}

.stat-item:last-child {
  border-right: none;
}

.stat-number {
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 6px;
  background: linear-gradient(135deg, #fff, rgba(255,255,255,0.8));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-number span {
  font-size: 0.55em;
  font-weight: 600;
}

.stat-label {
  font-size: var(--font-size-sm);
  opacity: 0.75;
  letter-spacing: 0.02em;
}

/* ---- 板块标题 ---- */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,87,168,0.08);
  color: var(--color-primary);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, var(--font-size-4xl));
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

.section-title em {
  font-style: normal;
  color: var(--color-primary);
}

.section-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-line {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.section-line::before, .section-line::after {
  content: '';
  width: 40px;
  height: 2px;
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.section-line .dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

/* ---- 关于我们板块 ---- */
.about-section {
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: center;
}

.about-visual {
  position: relative;
}

.about-img-main {
  width: 100%;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  aspect-ratio: 4/3;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-lg);
  min-width: 180px;
  border: 1px solid var(--color-border-light);
}

.about-badge-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.about-badge-icon svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.about-badge p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.about-badge strong {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  font-weight: 800;
}

.about-content {}

.about-title {
  font-size: clamp(1.5rem, 2.5vw, var(--font-size-3xl));
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.about-title span {
  color: var(--color-primary);
}

.about-desc {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-base);
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

.about-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

.about-tag .check {
  width: 14px;
  height: 14px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.certs-grid {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
}

.cert-badge {
  background: var(--gradient-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
}

/* ---- 产品展示 ---- */
.products-section {
  background: var(--color-bg-alt);
}

.products-filter {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(0,87,168,0.3);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--spacing-xl);
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-base);
  position: relative;
  group: true;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(0,87,168,0.15);
}

.product-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--color-bg-alt);
  position: relative;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-md);
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-img img {
  transform: scale(1.05);
}

.product-card-badge {
  position: absolute;
  top: var(--spacing-sm);
  left: var(--spacing-sm);
  background: var(--color-primary);
  color: #fff;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
}

.product-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,87,168,0.9), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  align-items: flex-end;
  padding: var(--spacing-lg);
}

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

.product-card-overlay .btn {
  width: 100%;
  justify-content: center;
}

.product-card-body {
  padding: var(--spacing-lg);
}

.product-card-category {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.product-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-card-pdf {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.product-card-pdf:hover {
  color: var(--color-primary);
}

.product-card-pdf svg {
  width: 14px;
  height: 14px;
}

.products-more {
  text-align: center;
  margin-top: var(--spacing-3xl);
}

/* ---- 服务板块 ---- */
.services-section {
  background: var(--color-bg);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-xl);
}

.service-card {
  padding: var(--spacing-2xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transform-origin: left;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,87,168,0.15);
}

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

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(0,87,168,0.1), rgba(26,127,212,0.05));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  background: var(--gradient-primary);
}

.service-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.service-card:hover .service-icon svg {
  color: #fff;
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.service-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.service-link:hover {
  gap: 10px;
}

/* ---- 解决方案 ---- */
.solutions-section {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
}

.solutions-section::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 140%;
  background: radial-gradient(ellipse, rgba(0,87,168,0.3) 0%, transparent 70%);
  pointer-events: none;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.solution-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  cursor: pointer;
}

.solution-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.solution-card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: rgba(0,87,168,0.3);
  position: relative;
}

.solution-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
  transition: all var(--transition-slow);
}

.solution-card:hover .solution-card-img img {
  opacity: 1;
  transform: scale(1.04);
}

.solution-card-img-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,20,60,0.6), transparent);
}

.solution-card-body {
  padding: var(--spacing-xl);
}

.solution-num {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.solution-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.solution-desc {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.solution-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.solution-tag {
  padding: 3px 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-full);
  font-size: 11px;
  color: rgba(255,255,255,0.7);
}

/* ---- 新闻资讯 ---- */
.news-section {
  background: var(--color-bg-alt);
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.news-featured {
  grid-row: span 2;
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.news-featured:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.news-featured-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--gradient-primary);
  position: relative;
}

.news-featured-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-featured:hover .news-featured-img img {
  transform: scale(1.04);
}

.news-featured-body {
  padding: var(--spacing-xl);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-date {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.news-date svg {
  width: 12px;
  height: 12px;
}

.news-category {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.05em;
  background: rgba(0,87,168,0.08);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-right: var(--spacing-sm);
}

.news-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.news-featured:hover .news-title,
.news-card:hover .news-title {
  color: var(--color-primary);
}

.news-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.news-read-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  margin-top: auto;
}

.news-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
  border-color: rgba(0,87,168,0.12);
}

.news-card-date {
  flex-shrink: 0;
  width: 56px;
  text-align: center;
  padding: var(--spacing-sm);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.news-card-date .day {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.news-card-date .month-year {
  font-size: 10px;
  color: var(--color-text-muted);
  line-height: 1.3;
}

.news-card-content {
  flex: 1;
  min-width: 0;
}

.news-card-title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition-fast);
}

.news-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- 联系我们 ---- */
.contact-section {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-4xl);
  align-items: start;
}

.contact-info {}

.contact-info-title {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.contact-info-desc {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  align-items: flex-start;
}

.contact-item-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(0,87,168,0.1), rgba(26,127,212,0.05));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.contact-item-content {}

.contact-item-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.contact-item-value {
  font-size: var(--font-size-base);
  color: var(--color-text);
  font-weight: 500;
  line-height: 1.5;
}

.contact-form {
  background: var(--color-bg-alt);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  border: 1px solid var(--color-border-light);
}

.contact-form-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xl);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.form-label .required {
  color: var(--color-accent);
  margin-left: 2px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
  outline: none;
  appearance: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,87,168,0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

/* ---- CTA区 ---- */
.cta-section {
  background: var(--gradient-primary);
  padding: var(--spacing-4xl) 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.cta-section::before, .cta-section::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.1;
  background: #fff;
}

.cta-section::before {
  width: 400px; height: 400px;
  top: -200px; left: -100px;
}

.cta-section::after {
  width: 300px; height: 300px;
  bottom: -150px; right: 10%;
}

.cta-title {
  font-size: clamp(1.75rem, 3vw, var(--font-size-4xl));
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.cta-desc {
  font-size: var(--font-size-lg);
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--spacing-2xl);
  position: relative;
  z-index: 1;
}

.cta-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ---- 底栏 ---- */
.footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.75);
}

.footer-main {
  padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand {}

.footer-logo {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo img {
  height: 40px;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

.footer-brand-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: #fff;
}

.footer-desc {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
  color: rgba(255,255,255,0.55);
}

.footer-contact-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.footer-contact-item svg {
  width: 14px;
  height: 14px;
  color: var(--color-primary-light);
  flex-shrink: 0;
}

.footer-col-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: var(--font-size-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-link::before {
  content: '›';
  color: var(--color-primary-light);
  font-size: 16px;
  line-height: 1;
}

.footer-link:hover {
  color: #fff;
}

.footer-bottom {
  padding: var(--spacing-lg) 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
}

.footer-copyright a {
  color: rgba(255,255,255,0.55);
  transition: color var(--transition-fast);
}

.footer-copyright a:hover {
  color: #fff;
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
  transition: color var(--transition-fast);
}

.footer-legal a:hover {
  color: rgba(255,255,255,0.7);
}

/* ---- 悬浮联系按钮 ---- */
.float-contact {
  position: fixed;
  right: 24px;
  bottom: 80px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.float-btn {
  width: 52px;
  height: 52px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(0,87,168,0.4);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 28px rgba(0,87,168,0.5);
}

.float-btn svg {
  width: 22px;
  height: 22px;
}

.float-btn .tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-bg-dark);
  color: #fff;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.float-btn:hover .tooltip {
  opacity: 1;
}

.float-btn-top {
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.9);
  color: var(--color-text-light);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 1px solid var(--color-border);
}

.float-btn-top:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ---- 动画 ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.8); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 进入动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ---- 移动端响应式 ---- */
@media (max-width: 1024px) {
  :root { --container-max: 960px; }
  .about-grid { gap: var(--spacing-2xl); }
  .solutions-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root {
    --header-height: 68px;
    --spacing-4xl: 3.5rem;
  }
  
  .container { padding: 0 var(--spacing-lg); }
  
  .top-bar { display: none; }
  
  /* 手机端顶部信息栏：精简版 */
  .mobile-top-bar {
    display: flex !important;
    align-items: center;
    justify-content: space-between;
    padding: 8px var(--spacing-lg);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.78rem;
  }
  .mobile-top-bar a {
    color: #fff;
    text-decoration: none;
    padding: 2px 8px;
    border-radius: 4px;
    transition: background 0.2s;
  }
  .mobile-top-bar a:hover,
  .mobile-top-bar a.active {
    background: rgba(255,255,255,0.2);
  }
  .mobile-top-bar .mobile-lang-switch {
    display: flex;
    gap: 4px;
  }
  
  .nav-menu { display: none; }
  .mobile-menu-btn { display: flex; }
  
  .hero { max-height: 640px; }
  .hero-title { font-size: 1.75rem; }
  
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.15); }
  .stat-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,0.15); }
  .stat-item:nth-last-child(-n+2) { border-bottom: none; }

  .about-grid { grid-template-columns: 1fr; }
  .about-badge { right: var(--spacing-md); bottom: var(--spacing-md); }
  
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  
  .solutions-grid { grid-template-columns: 1fr; }
  
  .news-grid { grid-template-columns: 1fr; }
  .news-featured { grid-row: span 1; }
  
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-2xl); }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .products-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---- 移动端顶部栏 ---- */
.mobile-top-bar {
  display: none;
}

/* ---- 移动端导航覆盖 ---- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 1100;
  pointer-events: none;
}

.mobile-nav-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-nav-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 100%;
  background: #fff;
  transform: translateX(100%);
  transition: transform var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.mobile-nav.open {
  pointer-events: auto;
}

.mobile-nav.open .mobile-nav-overlay {
  opacity: 1;
}

.mobile-nav.open .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-nav-header {
  padding: var(--spacing-xl) var(--spacing-xl) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.mobile-nav-close {
  width: 32px;
  height: 32px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  color: var(--color-text-light);
}

.mobile-nav-items {
  padding: var(--spacing-md);
  flex: 1;
}

.mobile-nav-item {
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-nav-link:hover, .mobile-nav-link.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

.mobile-nav-sub {
  padding: 0 var(--spacing-md) var(--spacing-sm);
  display: none;
}

.mobile-nav-sub.open {
  display: block;
}

.mobile-nav-sub a {
  display: block;
  padding: 8px var(--spacing-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.mobile-nav-sub a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
  padding-left: calc(var(--spacing-md) + 4px);
}

/* ---- 加载状态 ---- */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border-light) 50%, var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 工具类 ---- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.font-bold { font-weight: 700; }
.font-800 { font-weight: 800; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }