/* ===== 梦欣元科技官网 v4 - LOGO配色适配版 ===== */
/* 基于v2清爽风格，适配中国红LOGO */
/* 配色：白底为主 + 中国红点睛 + 深蓝灰文字 */

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

:root {
  /* === 品牌色系 - 适配中国红LOGO === */
  --brand-red: #E60012;         /* LOGO主色 - 中国红 */
  --brand-red-dark: #C4000B;    /* 深红 - hover */
  --brand-red-light: #FFE5E7;   /* 浅红 - 背景点缀 */
  
  /* === 清爽基底 - 保留v2优点 === */
  --bg-main: #FAFBFC;           /* 全局浅灰白背景 */
  --bg-light: #F5F7FA;          /* 浅灰过渡 */
  --bg-card: #FFFFFF;           /* 卡片纯白底 */
  --bg-red-soft: #FFF5F5;       /* 极浅红背景区 */
  
  /* === 文字分层 === */
  --text-title: #1A1A2E;        /* 大标题 - 接近黑的深蓝 */
  --text-body: #4A5568;         /* 正文 - 中性灰 */
  --text-muted: #718096;        /* 辅助小字 */
  --white: #FFFFFF;
  
  /* === 功能色 === */
  --primary: #E60012;           /* 主色 = LOGO红 */
  --primary-dark: #C4000B;
  --primary-light: #FFE5E7;
  
  --border: #E2E8F0;
  --border-light: #EDF2F7;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(230, 0, 18, 0.12);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.05);
  
  /* === 尺寸与过渡 === */
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --transition: 200ms ease;
  --container: 1200px;
  --section-gap: 80px;
}

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

body { 
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-body); 
  background: var(--bg-main); 
  line-height: 1.7; 
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--primary); text-decoration: none; transition: all var(--transition); }
a:hover { color: var(--primary-dark); }

ul { list-style: none; }

button { cursor: pointer; font-family: inherit; border: none; background: none; }
button:focus { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-light); }
::-webkit-scrollbar-thumb { background: #CBD5E0; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== 选择颜色 ===== */
::selection { background: var(--primary-light); color: var(--text-title); }

/* ===== 容器 ===== */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== 导航栏（白底 + 红LOGO）===== */
.navbar {
  position: fixed; 
  top: 0; left: 0; right: 0; 
  z-index: 1000;
  background: var(--white);
  height: 72px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  border-bottom: 1px solid var(--border-light);
}

.navbar .container { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 72px; 
}

.navbar-logo { 
  display: flex; 
  align-items: center; 
  gap: 12px; 
}

.navbar-logo img {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.navbar-logo .logo-text {
  display: flex;
  flex-direction: column;
}

.navbar-logo .logo-text .brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.2;
}

.navbar-logo .logo-text .brand-slogan {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 400;
}

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

.navbar-nav a { 
  color: var(--text-body); 
  font-size: 15px; 
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

.navbar-nav a:hover { 
  color: var(--primary); 
}

.navbar-nav a.active { 
  color: var(--primary); 
}

.navbar-nav a.active::after { 
  content: ''; 
  position: absolute; 
  bottom: -4px; 
  left: 0; 
  right: 0; 
  height: 2px; 
  background: var(--primary); 
  border-radius: 1px; 
}

.navbar-cta { 
  background: var(--primary); 
  color: var(--white) !important; 
  padding: 10px 22px; 
  border-radius: 6px; 
  font-weight: 500;
  transition: all var(--transition);
}

.navbar-cta:hover { 
  background: var(--primary-dark); 
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(230, 0, 18, 0.3);
}

.navbar-cta::after { display: none !important; }

/* 汉堡菜单 */
.navbar-hamburger { 
  display: none; 
  background: none; 
  border: none; 
  cursor: pointer; 
  padding: 8px; 
}

.navbar-hamburger span { 
  display: block; 
  width: 22px; 
  height: 2px; 
  background: var(--text-title); 
  margin: 5px 0; 
  transition: all var(--transition); 
  border-radius: 1px; 
}

/* 移动端导航 */
.mobile-nav { 
  display: none; 
  position: fixed; 
  top: 72px; 
  left: 0; 
  right: 0; 
  background: var(--white); 
  padding: 16px 24px; 
  z-index: 999; 
  flex-direction: column; 
  gap: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  border-top: 1px solid var(--border-light);
}

.mobile-nav a { 
  color: var(--text-body); 
  font-size: 15px; 
  padding: 12px 16px;
  border-radius: 6px;
  font-weight: 500;
}

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

.mobile-nav .navbar-cta {
  margin-top: 8px;
  text-align: center;
}

.mobile-nav.active { display: flex; }

@media (max-width: 1024px) {
  .navbar-nav { display: none; }
  .navbar-hamburger { display: block; }
}

/* ===== 主内容 ===== */
.main-content { padding-top: 72px; }

/* ===== Hero Banner（白底 + 红点缀）===== */
.hero {
  background: linear-gradient(135deg, var(--white) 0%, var(--bg-red-soft) 100%);
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
  opacity: 0.5;
  pointer-events: none;
}

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

.hero-content { 
  text-align: center; 
  max-width: 800px; 
  margin: 0 auto; 
}

.hero h1 { 
  font-size: 44px; 
  font-weight: 700; 
  color: var(--text-title); 
  margin-bottom: 20px; 
  line-height: 1.3;
}

.hero h1 .highlight { 
  color: var(--primary);
  position: relative;
}

.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background: var(--primary-light);
  z-index: -1;
  border-radius: 4px;
}

.hero p { 
  font-size: 18px; 
  color: var(--text-muted); 
  margin-bottom: 32px; 
  line-height: 1.8;
}

.hero-actions { 
  display: flex; 
  gap: 16px; 
  justify-content: center; 
  flex-wrap: wrap; 
}

@media (max-width: 768px) {
  .hero { padding: 80px 0 60px; }
  .hero h1 { font-size: 32px; }
  .hero p { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
}

/* ===== 页面头部 ===== */
.page-header { 
  background: linear-gradient(135deg, var(--bg-red-soft) 0%, var(--white) 100%); 
  padding: 80px 0 60px; 
  text-align: center; 
  border-bottom: 1px solid var(--border-light);
}

.page-header h1 { 
  color: var(--text-title); 
  font-size: 36px; 
  font-weight: 700; 
  margin-bottom: 12px;
}

.page-header p { 
  color: var(--text-muted); 
  font-size: 16px; 
  max-width: 600px;
  margin: 0 auto;
}

.page-header .breadcrumb { 
  display: flex; 
  justify-content: center; 
  gap: 8px; 
  margin-top: 16px; 
  font-size: 14px; 
  flex-wrap: wrap;
}

.page-header .breadcrumb a { color: var(--text-muted); }
.page-header .breadcrumb a:hover { color: var(--primary); }
.page-header .breadcrumb span { color: var(--border); }

@media (max-width: 768px) {
  .page-header { padding: 60px 0 40px; }
  .page-header h1 { font-size: 28px; }
}

/* ===== 区块 ===== */
.section { padding: var(--section-gap) 0; }
.section.alt { background: var(--bg-light); }

.section-header { 
  text-align: center; 
  margin-bottom: 48px; 
}

.section-header h2 { 
  font-size: 32px; 
  font-weight: 700; 
  color: var(--text-title); 
  margin-bottom: 12px;
}

.section-header p { 
  font-size: 16px; 
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.section-header .divider {
  width: 48px;
  height: 3px;
  background: var(--primary);
  margin: 16px auto 0;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-header h2 { font-size: 26px; }
}

/* ===== 卡片网格 ===== */
.card-grid { 
  display: grid; 
  gap: 24px; 
}

.card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
  .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .card-grid.cols-2,
  .card-grid.cols-3,
  .card-grid.cols-4 { grid-template-columns: 1fr; }
}

/* ===== 卡片 ===== */
.card { 
  background: var(--bg-card); 
  border: 1px solid var(--border); 
  border-radius: var(--radius-lg); 
  box-shadow: var(--shadow-card); 
  padding: 32px; 
  transition: all var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover { 
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all var(--transition);
}

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

.card-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--primary);
  transition: stroke var(--transition);
}

.card:hover .card-icon svg {
  stroke: var(--white);
}

.card h3 { 
  font-size: 18px; 
  font-weight: 600; 
  color: var(--text-title); 
  margin-bottom: 12px;
}

.card p { 
  font-size: 14px; 
  color: var(--text-muted); 
  line-height: 1.7;
  flex: 1;
}

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

/* ===== 按钮 ===== */
.btn { 
  display: inline-flex; 
  align-items: center; 
  justify-content: center;
  gap: 8px; 
  padding: 12px 28px; 
  border-radius: 6px; 
  font-size: 15px; 
  font-weight: 500;
  transition: all var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
}

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

.btn-primary:hover { 
  background: var(--primary-dark); 
  border-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(230, 0, 18, 0.3);
}

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

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

.btn-secondary {
  background: var(--text-title);
  color: var(--white);
  border-color: var(--text-title);
}

.btn-secondary:hover {
  background: #0f0f1a;
  border-color: #0f0f1a;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 20px; }

.form-label { 
  display: block; 
  font-size: 14px; 
  font-weight: 500; 
  color: var(--text-title); 
  margin-bottom: 6px; 
}

.form-control { 
  width: 100%; 
  padding: 12px 16px; 
  border: 1.5px solid var(--border); 
  border-radius: 6px; 
  font-size: 15px;
  background: var(--bg-card); 
  color: var(--text-body);
  transition: all var(--transition);
}

.form-control:focus { 
  outline: none; 
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-control::placeholder {
  color: #A0AEC0;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23718096' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

textarea.form-control { 
  resize: vertical; 
  min-height: 100px; 
}

/* ===== 标签 ===== */
.tag { 
  display: inline-block; 
  padding: 4px 12px; 
  border-radius: 20px; 
  font-size: 12px; 
  font-weight: 500;
}

.tag-primary {
  background: var(--primary-light);
  color: var(--primary);
}

.tag-gray {
  background: var(--bg-light);
  color: var(--text-muted);
}

/* ===== 数据展示 ===== */
.stats-grid { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr); 
  gap: 24px; 
}

.stat-item { 
  text-align: center; 
  padding: 32px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.stat-item:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-hover);
}

.stat-number { 
  font-size: 40px; 
  font-weight: 700; 
  color: var(--primary); 
  margin-bottom: 8px;
  line-height: 1;
}

.stat-number .plus {
  font-size: 24px;
  color: var(--text-muted);
}

.stat-label { 
  font-size: 14px; 
  color: var(--text-muted); 
}

@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-number { font-size: 32px; }
}

/* ===== 时间轴 ===== */
.timeline { 
  position: relative; 
  padding-left: 32px; 
}

.timeline::before { 
  content: ''; 
  position: absolute; 
  left: 8px; 
  top: 0; 
  bottom: 0; 
  width: 2px; 
  background: var(--border); 
}

.timeline-item { 
  position: relative; 
  margin-bottom: 32px; 
  padding-left: 24px; 
}

.timeline-item::before { 
  content: ''; 
  position: absolute; 
  left: -28px; 
  top: 4px; 
  width: 14px; 
  height: 14px; 
  background: var(--bg-card); 
  border: 3px solid var(--primary); 
  border-radius: 50%; 
}

.timeline-year { 
  font-size: 14px; 
  font-weight: 600; 
  color: var(--primary); 
  margin-bottom: 4px;
}

.timeline-title { 
  font-size: 16px; 
  font-weight: 600; 
  color: var(--text-title); 
  margin-bottom: 6px; 
}

.timeline-desc { 
  font-size: 14px; 
  color: var(--text-muted); 
  line-height: 1.7; 
}

/* ===== Tab切换 ===== */
.tabs { 
  display: flex; 
  justify-content: center; 
  gap: 12px; 
  margin-bottom: 40px; 
  flex-wrap: wrap; 
}

.tab-btn { 
  padding: 10px 24px; 
  border: 1.5px solid var(--border); 
  border-radius: 6px; 
  font-size: 15px; 
  font-weight: 500; 
  color: var(--text-muted); 
  background: var(--bg-card); 
  cursor: pointer; 
  transition: all var(--transition);
}

.tab-btn:hover { 
  border-color: var(--primary-light); 
  color: var(--primary); 
}

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

/* ===== 分页 ===== */
.pagination { 
  display: flex; 
  justify-content: center; 
  gap: 8px; 
  margin-top: 40px; 
  flex-wrap: wrap;
}

.pagination a,
.pagination button { 
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  border: 1px solid var(--border); 
  background: var(--bg-card); 
  border-radius: 6px; 
  font-size: 14px; 
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: all var(--transition);
}

.pagination a:hover,
.pagination button:hover { 
  border-color: var(--primary); 
  color: var(--primary); 
}

.pagination a.active,
.pagination button.active { 
  background: var(--primary); 
  border-color: var(--primary); 
  color: var(--white); 
}

/* ===== CTA区块 ===== */
.cta-section {
  background: linear-gradient(135deg, var(--bg-red-soft) 0%, var(--white) 100%);
  padding: 80px 0;
  text-align: center;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.cta-section h2 { 
  font-size: 28px; 
  font-weight: 700; 
  color: var(--text-title); 
  margin-bottom: 16px; 
}

.cta-section p { 
  font-size: 16px; 
  color: var(--text-muted); 
  margin-bottom: 28px; 
}

.cta-section .btn { margin: 0 8px; }

@media (max-width: 768px) {
  .cta-section { padding: 60px 0; }
  .cta-section h2 { font-size: 24px; }
  .cta-section .btn { 
    display: block; 
    margin: 8px auto; 
    max-width: 280px;
  }
}

/* ===== 页脚 ===== */
.footer { 
  background: var(--text-title); 
  color: rgba(255,255,255,0.7); 
  padding: 48px 0 24px; 
}

.footer-grid { 
  display: grid; 
  grid-template-columns: 2fr 1fr 1fr 1fr; 
  gap: 40px; 
  margin-bottom: 32px; 
}

.footer-brand h3 { 
  color: var(--white); 
  font-size: 18px; 
  margin-bottom: 12px; 
}

.footer-brand p { 
  font-size: 14px; 
  line-height: 1.8; 
  color: rgba(255,255,255,0.6);
}

.footer h4 { 
  color: var(--white); 
  font-size: 14px; 
  margin-bottom: 14px; 
  font-weight: 600; 
}

.footer-links a { 
  display: block; 
  font-size: 14px; 
  padding: 4px 0; 
  color: rgba(255,255,255,0.55); 
  transition: color var(--transition); 
}

.footer-links a:hover { 
  color: var(--white); 
}

.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
}

.footer-bottom { 
  border-top: 1px solid rgba(255,255,255,0.1); 
  padding-top: 20px; 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  font-size: 13px; 
  flex-wrap: wrap; 
  gap: 8px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a { 
  color: rgba(255,255,255,0.5); 
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 模态框 ===== */
.modal-overlay { 
  display: none; 
  position: fixed; 
  inset: 0; 
  background: rgba(26, 26, 46, 0.6); 
  z-index: 2000; 
  align-items: center; 
  justify-content: center; 
  padding: 20px;
  backdrop-filter: blur(4px);
}

.modal-overlay.active { display: flex; }

.modal { 
  background: var(--bg-card); 
  border-radius: var(--radius-lg); 
  max-width: 800px; 
  width: 100%; 
  max-height: 90vh; 
  overflow: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.modal-header { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  padding: 20px 24px; 
  border-bottom: 1px solid var(--border); 
}

.modal-header h3 { 
  font-size: 18px; 
  font-weight: 600; 
  color: var(--text-title); 
}

.modal-close { 
  background: none; 
  border: none; 
  font-size: 24px; 
  color: var(--text-muted); 
  cursor: pointer;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: all var(--transition);
}

.modal-close:hover {
  background: var(--bg-light);
  color: var(--text-title);
}

.modal-body { padding: 24px; }

.modal-footer { 
  padding: 16px 24px; 
  border-top: 1px solid var(--border); 
  display: flex; 
  justify-content: flex-end; 
  gap: 12px; 
  background: var(--bg-main);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  opacity: 0;
  transform: translateY(20px);
}

.fade-up.visible {
  animation: fadeInUp 0.5s ease forwards;
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* ===== 辅助类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

.hidden { display: none !important; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 打印样式 ===== */
@media print {
  .navbar,
  .footer,
  .cta-section,
  .btn {
    display: none !important;
  }
  
  body {
    background: #fff;
    color: #000;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}