/* ============================================
   上海电湃科技 - 企业官网全局样式表
   Shanghai Dianpai Technology Co., Ltd.
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* 核心色彩 - Deep Ocean Tech */
  --color-primary: #0c2340;
  --color-primary-light: #153a66;
  --color-secondary: #1a4a7a;
  --color-accent: #0891b2;
  --color-accent-hover: #0e7490;
  --color-accent-glow: rgba(8, 145, 178, 0.15);
  --color-bg: #f4f6f9;
  --color-bg-alt: #eef1f5;
  --color-bg-warm: #fafbfc;
  --color-white: #FFFFFF;
  --color-text: #0f172a;
  --color-text-muted: #5a6577;
  --color-border: #dde2ea;

  /* 渐变色 */
  --gradient-hero: linear-gradient(160deg, #0c2340 0%, #164e73 40%, #0891b2 100%);
  --gradient-section: linear-gradient(180deg, #ffffff 0%, #f4f6f9 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  --gradient-btn: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
  --gradient-footer: linear-gradient(180deg, #071a30 0%, #0c2340 50%, #06304d 100%);

  /* 字体 */
  --font-cn: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Orbitron', 'Rajdhani', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* 间距系统 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(12, 35, 64, 0.06);
  --shadow-md: 0 4px 16px rgba(12, 35, 64, 0.10);
  --shadow-lg: 0 8px 32px rgba(12, 35, 64, 0.14);
  --shadow-xl: 0 16px 48px rgba(12, 35, 64, 0.18);
  --shadow-glow: 0 0 24px rgba(8, 145, 178, 0.25);

  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;

  /* 布局 */
  --navbar-height: 72px;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-cn);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-accent);
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* --- Utility Classes --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

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

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
  margin: var(--space-md) auto 0;
  border-radius: var(--radius-full);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-btn);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(8, 145, 178, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(8, 145, 178, 0.45);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-primary);
}

/* ============================================
   NAVBAR - 固定顶部导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  z-index: 1000;
  background: #ffffff;
  transition: all var(--transition-base);
  border-bottom: 1px solid var(--color-border);
}

.navbar.scrolled {
  box-shadow: 0 2px 16px rgba(12, 35, 64, 0.06);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-primary);
  font-weight: 700;
  z-index: 1001;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo-cn {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav-logo-en {
  font-family: var(--font-en);
  font-size: 0.65rem;
  color: var(--color-accent);
  letter-spacing: 2px;
  opacity: 0.85;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  padding: 0.5rem 1rem;
  color: rgba(12, 35, 64, 0.7);
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单遮罩 */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.mobile-menu-overlay.active {
  opacity: 1;
}

/* ============================================
   HERO SECTION - 首屏大图区
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(8, 145, 178, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 145, 178, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

.hero-bg-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.2;
}

.hero-bg-glow-1 {
  top: -200px;
  right: -100px;
  background: var(--color-accent);
}

.hero-bg-glow-2 {
  bottom: -200px;
  left: -100px;
  background: #0077B6;
}

.hero-bg-lines {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-line {
  position: absolute;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, rgba(0, 180, 216, 0.15), transparent);
  animation: linePulse 4s ease-in-out infinite;
}

.hero-line:nth-child(1) { left: 15%; animation-delay: 0s; }
.hero-line:nth-child(2) { left: 35%; animation-delay: 1s; }
.hero-line:nth-child(3) { left: 55%; animation-delay: 2s; }
.hero-line:nth-child(4) { left: 75%; animation-delay: 3s; }

@keyframes linePulse {
  0%, 100% { opacity: 0.2; }
  50% { opacity: 0.6; }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4rem 1rem;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.25);
  border-radius: var(--radius-full);
  color: var(--color-accent);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s ease forwards;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease 0.15s forwards;
  opacity: 0;
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--color-accent), #48CAE4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
  max-width: 560px;
  animation: fadeInUp 0.8s ease 0.3s forwards;
  opacity: 0;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.45s forwards;
  opacity: 0;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin-top: var(--space-4xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

.hero-stat-item {
  text-align: center;
}

.hero-stat-number {
  font-family: var(--font-en);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-xs);
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero 视觉装饰 */
.hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeInRight 1s ease 0.5s forwards;
  opacity: 0;
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.hero-graphic {
  position: relative;
  width: 380px;
  height: 380px;
}

.hero-circle-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(0, 180, 216, 0.2);
  animation: ringRotate 20s linear infinite;
}

.hero-circle-ring:nth-child(1) {
  inset: 0;
  border-color: rgba(0, 180, 216, 0.15);
}

.hero-circle-ring:nth-child(2) {
  inset: 30px;
  border-color: rgba(0, 180, 216, 0.22);
  animation-direction: reverse;
  animation-duration: 15s;
}

.hero-circle-ring:nth-child(3) {
  inset: 70px;
  border-color: rgba(0, 180, 216, 0.3);
  border-style: dashed;
  animation-duration: 25s;
}

@keyframes ringRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.hero-circle-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.2), rgba(0, 119, 182, 0.2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 180, 216, 0.3);
}

.hero-center-text {
  font-family: var(--font-en);
  font-weight: 900;
  font-size: 1.1rem;
  color: var(--color-accent);
  letter-spacing: 3px;
  text-align: center;
}

.hero-orbit-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--color-accent);
}

.hero-orbit-dot:nth-child(5) { top: 0; left: 50%; transform: translate(-50%, -50%); }
.hero-orbit-dot:nth-child(6) { bottom: 0; left: 50%; transform: translate(-50%, 50%); }

/* ============================================
   CARDS - 通用卡片组件
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(8, 145, 178, 0.25);
}

.card-image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
}

.card-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 3rem;
  transition: transform var(--transition-slow);
}

.card:hover .card-image-placeholder {
  transform: scale(1.05);
}

.card-image-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.card-image-icon svg {
  width: 48px;
  height: 48px;
  stroke: var(--color-accent);
  stroke-width: 1.5;
  fill: none;
}

.card-image-icon span {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.6);
  font-weight: 500;
}

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

.card-tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  background: rgba(0, 180, 216, 0.1);
  color: var(--color-accent);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.card-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: gap var(--transition-fast);
}

.card-link:hover {
  gap: var(--space-sm);
  color: var(--color-accent-hover);
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.card-link:hover svg {
  transform: translateX(3px);
}

/* ============================================
   FEATURES / ADVANTAGES - 特性/优势区块
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.feature-item {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.feature-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 180, 216, 0.15);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.1), rgba(0, 119, 182, 0.08));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-accent);
  stroke-width: 1.8;
  fill: none;
}

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.feature-desc {
  font-size: 0.87rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 数据统计条 */
.stats-bar {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  padding: var(--space-3xl) 0;
  color: var(--color-white);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  text-align: center;
}

.stat-item {
  padding: var(--space-md);
}

.stat-number {
  font-family: var(--font-en);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   NEWS LIST - 新闻列表
   ============================================ */
.news-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.news-item {
  display: flex;
  gap: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid rgba(0, 0, 0, 0.04);
  cursor: pointer;
  border-left: 4px solid transparent;
}

.news-item:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--color-accent);
}

.news-date-box {
  flex-shrink: 0;
  text-align: center;
  min-width: 70px;
  padding: var(--space-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-md);
  color: var(--color-white);
}

.news-date-day {
  font-family: var(--font-en);
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1;
}

.news-date-month {
  font-size: 0.78rem;
  opacity: 0.8;
  margin-top: 2px;
}

.news-date-year {
  font-size: 0.7rem;
  opacity: 0.6;
  margin-top: 2px;
}

.news-info {
  flex: 1;
}

.news-category {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  background: rgba(0, 180, 216, 0.1);
  color: var(--color-accent);
  font-size: 0.73rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.news-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.news-item:hover .news-title {
  color: var(--color-accent);
}

.news-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   ABOUT PAGE - 关于我们页面专用
   ============================================ */

/* 公司简介 */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-intro-image {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.3);
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}

.about-intro-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(45deg, transparent 40%, rgba(0, 180, 216, 0.08) 50%, transparent 60%);
  animation: shimmer 3s ease infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.about-intro-text h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
  line-height: 1.3;
}

.about-intro-text p {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: var(--space-md);
}

.about-lead {
  font-size: 1.12rem !important;
  color: var(--color-text) !important;
  line-height: 2 !important;
  padding: var(--space-lg);
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-xl) !important;
}

.about-company-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
}

.meta-label {
  color: var(--color-text-muted);
  white-space: nowrap;
}

.meta-value {
  font-weight: 600;
  color: var(--color-primary);
}

/* 营业范围 */
.scope-section {
  background: var(--color-white);
}

.scope-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.scope-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

.scope-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.scope-card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  color: var(--color-accent);
  font-size: 1.3rem;
}

.scope-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.scope-list li {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: var(--space-xs) 0;
  padding-left: var(--space-md);
  position: relative;
  line-height: 1.6;
}

.scope-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}

/* 发展历程时间线 */
.timeline-section {
  background: var(--color-bg);
  position: relative;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-primary));
  border-radius: var(--radius-full);
}

.timeline-item {
  position: relative;
  padding-left: 64px;
  padding-bottom: var(--space-2xl);
}

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

.timeline-dot {
  position: absolute;
  left: 14px;
  top: 4px;
  width: 22px;
  height: 22px;
  background: var(--color-white);
  border: 3px solid var(--color-accent);
  border-radius: 50%;
  z-index: 1;
  transition: all var(--transition-base);
}

.timeline-item:hover .timeline-dot {
  background: var(--color-accent);
  box-shadow: 0 0 0 6px rgba(0, 180, 216, 0.15);
}

.timeline-year {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
  letter-spacing: 1px;
}

.timeline-content {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

.timeline-item:hover .timeline-content {
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 180, 216, 0.15);
}

.timeline-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================
   PRODUCTS PAGE - 产品中心专用
   ============================================ */
.product-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.product-tab {
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-base);
}

.product-tab:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.product-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(8, 145, 178, 0.25);
}

.product-image-area {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image-area::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(10, 43, 78, 0.3));
}

.product-image-placeholder {
  color: rgba(255, 255, 255, 0.25);
  font-size: 3.5rem;
  z-index: 1;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image-placeholder {
  transform: scale(1.08);
}

.product-info {
  padding: var(--space-xl);
}

.product-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.product-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.product-spec-tag {
  padding: 0.2rem 0.6rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  font-size: 0.77rem;
  color: var(--color-text-muted);
}

/* ============================================
   CONTACT PAGE - 联系我们专用
   ============================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.contact-info-card {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base);
}

.contact-info-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 180, 216, 0.15);
}

.contact-icon-wrap {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.contact-icon-wrap svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
}

.contact-detail h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.contact-detail p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* 联系表单 */
.contact-form-wrapper {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.contact-form-wrapper h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xl);
}

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

.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.1);
  background: var(--color-white);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

/* 地图占位 */
.map-placeholder {
  width: 100%;
  height: 300px;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  border-radius: var(--radius-lg);
  margin-top: var(--space-3xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 1rem;
  position: relative;
  overflow: hidden;
}

.map-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 30% 40%, rgba(0, 180, 216, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(0, 180, 216, 0.1) 0%, transparent 50%);
}

.map-placeholder-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.map-pin-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

/* ============================================
   NEWS PAGE - 新闻资讯专用
   ============================================ */
.news-filter {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ============================================
   FOOTER - 页脚
   ============================================ */
.footer {
  background: var(--gradient-footer);
  color: rgba(255, 255, 255, 0.75);
  padding: var(--space-4xl) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-white);
}

.footer-logo-icon {
  width: 30px;
  height: 30px;
  object-fit: contain;
}

.footer-logo-text {
  font-size: 1.1rem;
  font-weight: 700;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
  position: relative;
  padding-bottom: var(--space-sm);
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.55);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-col ul li a:hover {
  color: var(--color-accent);
  transform: translateX(4px);
}

.footer-bottom {
  padding: var(--space-lg) 0;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.83rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ============================================
   BACK TO TOP - 回到顶部
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: 900;
  border: none;
}

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

.back-to-top:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
}

/* ============================================
   ANIMATIONS - 滚动动画
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.revealed {
  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; }

/* ============================================
   PAGE BANNER - 内页顶部横幅
   ============================================ */
.page-banner {
  position: relative;
  padding: calc(var(--navbar-height) + var(--space-4xl)) 0 var(--space-4xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(0, 180, 216, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 180, 216, 0.08) 0%, transparent 50%);
}

.page-banner-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-banner h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.65);
  max-width: 550px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  font-size: 0.7rem;
}

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

/* ============================================
   RESPONSIVE - 响应式布局
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --navbar-height: 64px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
  }

  .about-intro {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero-graphic {
    width: 280px;
    height: 280px;
  }

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

/* Mobile */
@media (max-width: 768px) {
  :root {
    --navbar-height: 60px;
  }

  .container {
    padding: 0 var(--space-lg);
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  /* Navigation */
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #ffffff;
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--navbar-height) + var(--space-xl)) var(--space-xl) var(--space-xl);
    gap: var(--space-xs);
    transition: right var(--transition-base);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.4);
    z-index: 1000;
  }

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

  .nav-link {
    padding: 0.85rem 1rem;
    font-size: 1rem;
    border-radius: var(--radius-md);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link:hover,
  .nav-link.active {
    background: rgba(0, 180, 216, 0.12);
    color: var(--color-accent);
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu-overlay {
    display: block;
  }

  /* Hero */
  .hero {
    min-height: auto;
    padding: calc(var(--navbar-height) + var(--space-3xl)) 0 var(--space-3xl);
  }

  .hero-visual {
    display: none;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-md);
    margin-top: var(--space-2xl);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Cards */
  .card-grid {
    grid-template-columns: 1fr;
  }

  /* Features */
  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .feature-item {
    padding: var(--space-lg);
  }

  /* Stats */
  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  /* News Item */
  .news-item {
    flex-direction: column;
    gap: var(--space-md);
  }

  .news-date-box {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: auto;
    padding: var(--space-sm) var(--space-md);
  }

  .news-date-day {
    font-size: 1.4rem;
  }

  /* About */
  .about-company-meta {
    grid-template-columns: 1fr;
  }

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

  .timeline::before {
    left: 16px;
  }

  .timeline-item {
    padding-left: 48px;
  }

  .timeline-dot {
    left: 6px;
    width: 20px;
    height: 20px;
  }

  /* Contact */
  .contact-info-card {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .contact-icon-wrap {
    margin: 0 auto;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  /* Back to Top */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }

  /* Page Banner */
  .page-banner {
    padding: calc(var(--navbar-height) + var(--space-2xl)) 0 var(--space-2xl);
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .product-tabs {
    gap: var(--space-xs);
  }

  .product-tab {
    padding: 0.5rem 1rem;
    font-size: 0.82rem;
  }
}