/* =============================================
   蘑菇视频官网 - 主样式文件
   深空黑 + 霓虹蓝紫渐变配色
   ============================================= */

/* 变量定义 */
:root {
  --bg-dark: #0a0c14;
  --bg-card: #111827;
  --bg-card2: #161d2e;
  --neon-blue: #00d4ff;
  --neon-purple: #8b5cf6;
  --neon-grad: linear-gradient(135deg, #00d4ff 0%, #8b5cf6 100%);
  --text-primary: #f0f4ff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(255,255,255,0.08);
  --border-neon: rgba(0,212,255,0.3);
  --shadow-neon: 0 0 20px rgba(0,212,255,0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
}

/* 重置 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  background: var(--bg-dark);
  color: var(--text-primary);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--neon-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--neon-purple); }
ul { list-style: none; }

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===================== 导航栏 ===================== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(10,12,20,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; gap: 20px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  color: var(--text-primary) !important; font-weight: 700; font-size: 1.2rem;
}
.logo img { border-radius: 8px; width: 36px; height: 36px; object-fit: cover; }
.logo-text { background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 6px 14px; border-radius: 8px;
  color: var(--text-secondary); font-size: 0.9rem; transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--neon-blue); background: rgba(0,212,255,0.08); }
.nav-cta {
  background: var(--neon-grad); color: #fff !important;
  padding: 6px 18px; border-radius: 20px; font-weight: 600;
}
.nav-cta:hover { opacity: 0.85; transform: translateY(-1px); }
.nav-toggle {
  display: none; background: none; border: none;
  color: var(--text-primary); font-size: 1.5rem; cursor: pointer;
}

/* 搜索框 */
.search-bar-wrap { padding: 8px 0; }
.search-bar {
  display: flex; align-items: center;
  background: var(--bg-card); border: 1px solid var(--border-neon);
  border-radius: 30px; overflow: hidden; max-width: 700px; margin: 0 auto;
  transition: var(--transition);
}
.search-bar:focus-within { border-color: var(--neon-blue); box-shadow: var(--shadow-neon); }
.search-input {
  flex: 1; background: none; border: none; outline: none;
  color: var(--text-primary); padding: 10px 20px; font-size: 0.9rem;
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
  background: var(--neon-grad); border: none; cursor: pointer;
  color: #fff; padding: 10px 22px; font-size: 0.9rem; font-weight: 600;
  display: flex; align-items: center; gap: 6px; transition: var(--transition);
}
.search-btn:hover { opacity: 0.85; }
.search-tips { text-align: center; padding: 6px 0; font-size: 0.82rem; color: var(--text-muted); }
.search-tips a { color: var(--neon-blue); margin: 0 6px; }
.search-tips a:hover { color: var(--neon-purple); }

/* ===================== 通用区块 ===================== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700;
  background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 12px;
}
.section-sub { color: var(--text-secondary); font-size: 1rem; max-width: 600px; margin: 0 auto; }
.section-more { text-align: center; margin-top: 40px; }

/* ===================== Hero Banner ===================== */
.hero-section {
  position: relative; min-height: 85vh;
  display: flex; align-items: center;
  overflow: hidden; padding: 60px 0;
}
.hero-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,212,255,0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(139,92,246,0.1) 0%, transparent 60%),
              var(--bg-dark);
}
.hero-bg::before {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(circle, rgba(0,212,255,0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-inner {
  position: relative; display: grid;
  grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.hero-title {
  font-size: clamp(2rem, 4vw, 3rem); font-weight: 800;
  line-height: 1.2; margin-bottom: 16px;
}
.gradient-text { background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.hero-sub { color: var(--text-secondary); font-size: 1.05rem; margin-bottom: 12px; }
.hero-domain-tip { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 28px; }
.neon-text { color: var(--neon-blue); }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 1.6rem; font-weight: 800; background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-num em { font-size: 0.9rem; font-style: normal; }
.stat-label { font-size: 0.78rem; color: var(--text-muted); }
.hero-img-wrap { position: relative; }
.hero-img { border-radius: var(--radius-lg); box-shadow: 0 0 60px rgba(0,212,255,0.2); width: 100%; }

/* ===================== 按钮 ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: 30px; font-weight: 600;
  font-size: 0.95rem; cursor: pointer; transition: var(--transition);
  border: none; text-decoration: none;
}
.btn-primary { background: var(--neon-grad); color: #fff; }
.btn-primary:hover { opacity: 0.85; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(0,212,255,0.3); color: #fff; }
.btn-outline {
  background: transparent; color: var(--neon-blue);
  border: 1px solid var(--neon-blue);
}
.btn-outline:hover { background: rgba(0,212,255,0.1); transform: translateY(-2px); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-full { width: 100%; }

/* ===================== 视频卡片 ===================== */
.video-section { background: var(--bg-card2); }
.video-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.video-card {
  background: var(--bg-card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
  transition: var(--transition); cursor: pointer;
}
.video-card:hover { border-color: var(--border-neon); transform: translateY(-4px); box-shadow: var(--shadow-neon); }
.video-thumb-wrap { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.video-thumb { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.video-card:hover .video-thumb { transform: scale(1.05); }
.video-overlay {
  position: absolute; inset: 0;
  background: rgba(0,0,0,0); display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.video-card:hover .video-overlay { background: rgba(0,0,0,0.35); }
.play-btn {
  opacity: 0; transform: scale(0.8); transition: var(--transition);
  background: none; border: none; cursor: pointer;
}
.play-btn svg { width: 60px; height: 60px; filter: drop-shadow(0 0 12px rgba(0,212,255,0.6)); }
.video-card:hover .play-btn { opacity: 1; transform: scale(1); }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75); color: #fff;
  font-size: 0.75rem; padding: 2px 8px; border-radius: 4px;
}
.video-tag {
  position: absolute; top: 8px; left: 8px;
  background: var(--neon-grad); color: #fff;
  font-size: 0.72rem; padding: 2px 10px; border-radius: 20px;
}
.video-info { padding: 14px; }
.video-title { font-size: 0.9rem; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); line-height: 1.4; }
.video-meta { display: flex; gap: 14px; font-size: 0.78rem; color: var(--text-muted); }

/* ===================== 产品卡片 ===================== */
.product-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.product-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  border: 1px solid var(--border); overflow: hidden; transition: var(--transition);
}
.product-card:hover { border-color: var(--border-neon); transform: translateY(-4px); box-shadow: var(--shadow-neon); }
.product-img-wrap { overflow: hidden; aspect-ratio: 4/3; }
.product-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.product-card:hover .product-img-wrap img { transform: scale(1.04); }
.product-body { padding: 24px; }
.product-tag {
  display: inline-block; background: rgba(0,212,255,0.12);
  color: var(--neon-blue); font-size: 0.75rem; padding: 3px 12px;
  border-radius: 20px; margin-bottom: 12px;
}
.product-body h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.product-body p { color: var(--text-secondary); font-size: 0.88rem; margin-bottom: 14px; }
.feature-list { margin-bottom: 18px; }
.feature-list li {
  color: var(--text-secondary); font-size: 0.85rem; padding: 4px 0;
  padding-left: 16px; position: relative;
}
.feature-list li::before { content: '▸'; position: absolute; left: 0; color: var(--neon-blue); }

/* ===================== 技术区块 ===================== */
.tech-section { background: var(--bg-card2); }
.tech-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.tech-item {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 28px; border: 1px solid var(--border); text-align: center;
  transition: var(--transition);
}
.tech-item:hover { border-color: var(--border-neon); box-shadow: var(--shadow-neon); }
.tech-icon { font-size: 2.5rem; margin-bottom: 14px; }
.tech-item h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; color: var(--neon-blue); }
.tech-item p { color: var(--text-secondary); font-size: 0.85rem; }

/* ===================== 解决方案 ===================== */
.solution-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.solution-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border); transition: var(--transition);
}
.solution-card:hover { border-color: var(--border-neon); transform: translateY(-4px); box-shadow: var(--shadow-neon); }
.solution-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.solution-body { padding: 20px; }
.solution-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.solution-body p { color: var(--text-secondary); font-size: 0.85rem; margin-bottom: 14px; }
.link-arrow { color: var(--neon-blue); font-size: 0.88rem; font-weight: 600; }
.link-arrow:hover { color: var(--neon-purple); }

/* ===================== 流程步骤 ===================== */
.process-section { background: var(--bg-card2); }
.process-steps { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.process-step {
  background: var(--bg-card); border-radius: var(--radius);
  padding: 28px 20px; text-align: center; border: 1px solid var(--border);
  flex: 1; min-width: 180px; max-width: 220px; transition: var(--transition);
}
.process-step:hover { border-color: var(--border-neon); box-shadow: var(--shadow-neon); }
.step-num {
  font-size: 2rem; font-weight: 900;
  background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.process-step h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.process-step p { color: var(--text-secondary); font-size: 0.82rem; }
.process-arrow { font-size: 1.5rem; color: var(--neon-blue); opacity: 0.5; }

/* ===================== 案例 ===================== */
.case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.case-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border); transition: var(--transition);
}
.case-card:hover { border-color: var(--border-neon); transform: translateY(-4px); box-shadow: var(--shadow-neon); }
.case-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.case-body { padding: 20px; }
.case-tag {
  display: inline-block; background: rgba(139,92,246,0.15);
  color: var(--neon-purple); font-size: 0.75rem; padding: 3px 12px;
  border-radius: 20px; margin-bottom: 10px;
}
.case-body h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.case-body p { color: var(--text-secondary); font-size: 0.83rem; margin-bottom: 12px; }
.case-metrics { display: flex; gap: 16px; margin-bottom: 12px; font-size: 0.8rem; color: var(--text-muted); }
.case-metrics strong { color: var(--neon-blue); }

/* ===================== 新闻 ===================== */
.news-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.news-card {
  background: var(--bg-card); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border); transition: var(--transition);
}
.news-card:hover { border-color: var(--border-neon); transform: translateY(-3px); box-shadow: var(--shadow-neon); }
.news-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.news-body { padding: 16px; }
.news-tag {
  display: inline-block; background: rgba(0,212,255,0.1);
  color: var(--neon-blue); font-size: 0.72rem; padding: 2px 10px;
  border-radius: 20px; margin-bottom: 8px;
}
.news-title { font-size: 0.88rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.news-date { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 8px; }

/* ===================== 用户评价 ===================== */
.review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.review-card {
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 24px; border: 1px solid var(--border); transition: var(--transition);
}
.review-card:hover { border-color: var(--border-neon); box-shadow: var(--shadow-neon); }
.review-header { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.review-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--neon-grad); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 1.1rem; color: #fff; flex-shrink: 0;
}
.review-header strong { display: block; font-size: 0.95rem; }
.review-role { font-size: 0.78rem; color: var(--text-muted); }
.review-stars { margin-left: auto; color: #fbbf24; font-size: 0.9rem; }
.review-text { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.7; margin-bottom: 12px; }
.review-footer { font-size: 0.78rem; color: var(--text-muted); }

/* ===================== FAQ ===================== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 12px; overflow: hidden; transition: var(--transition);
}
.faq-item:hover { border-color: var(--border-neon); }
.faq-q {
  width: 100%; background: var(--bg-card); border: none; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 20px; color: var(--text-primary); font-size: 0.95rem; font-weight: 600;
  text-align: left; transition: var(--transition);
}
.faq-q:hover { background: var(--bg-card2); color: var(--neon-blue); }
.faq-icon { font-size: 1.3rem; color: var(--neon-blue); flex-shrink: 0; margin-left: 12px; }
.faq-a { background: var(--bg-card2); padding: 16px 20px; }
.faq-a p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.8; }

/* ===================== 联系我们 ===================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 50px; align-items: start; }
.contact-info h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 24px; }
.contact-item { display: flex; gap: 16px; margin-bottom: 20px; align-items: flex-start; }
.contact-icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.contact-item strong { display: block; font-size: 0.9rem; margin-bottom: 4px; }
.contact-item p { color: var(--text-secondary); font-size: 0.85rem; }
.contact-form { background: var(--bg-card); border-radius: var(--radius-lg); padding: 32px; border: 1px solid var(--border); }
.contact-form h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.form-input, .form-textarea, select.form-input {
  width: 100%; background: var(--bg-dark); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text-primary); padding: 12px 16px;
  font-size: 0.88rem; outline: none; transition: var(--transition);
  font-family: inherit; margin-bottom: 14px;
}
.form-input:focus, .form-textarea:focus, select.form-input:focus { border-color: var(--neon-blue); box-shadow: 0 0 0 3px rgba(0,212,255,0.1); }
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 100px; }

/* ===================== 内页Hero ===================== */
.inner-hero {
  padding: 60px 0 40px;
  background: radial-gradient(ellipse at 50% 0%, rgba(0,212,255,0.06) 0%, transparent 70%), var(--bg-dark);
  border-bottom: 1px solid var(--border);
}
.inner-hero h1 { font-size: clamp(1.6rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: 10px; }
.inner-hero p { color: var(--text-secondary); font-size: 1rem; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--neon-blue); }
.breadcrumb span { color: var(--text-muted); }

/* ===================== 产品详情页 ===================== */
.product-detail-grid { display: flex; flex-direction: column; gap: 60px; }
.product-detail-card { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.product-detail-card img { border-radius: var(--radius-lg); width: 100%; }
.product-detail-body h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 14px; }
.product-detail-body p { color: var(--text-secondary); margin-bottom: 16px; }
.feature-list-detail { margin-bottom: 24px; }
.feature-list-detail li { color: var(--text-secondary); font-size: 0.88rem; padding: 6px 0 6px 20px; position: relative; border-bottom: 1px solid var(--border); }
.feature-list-detail li::before { content: '✓'; position: absolute; left: 0; color: var(--neon-blue); font-weight: 700; }
.feature-list-detail li strong { color: var(--text-primary); }

/* ===================== 解决方案详情 ===================== */
.solution-detail-list { display: flex; flex-direction: column; gap: 60px; }
.solution-detail-item { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.solution-detail-item.reverse { direction: rtl; }
.solution-detail-item.reverse > * { direction: ltr; }
.solution-detail-img img { border-radius: var(--radius-lg); width: 100%; }
.solution-detail-body h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 14px; }
.solution-detail-body p { color: var(--text-secondary); margin-bottom: 20px; }
.solution-highlights { display: flex; gap: 20px; margin-bottom: 24px; }
.highlight-item { text-align: center; }
.highlight-item strong { display: block; font-size: 1.6rem; font-weight: 800; background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.highlight-item span { font-size: 0.78rem; color: var(--text-muted); }

/* ===================== 案例详情 ===================== */
.case-detail-grid { display: flex; flex-direction: column; gap: 50px; }
.case-detail-card { background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); }
.case-detail-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.case-detail-body { padding: 32px; }
.case-detail-body h2 { font-size: 1.4rem; font-weight: 700; margin-bottom: 12px; }
.case-detail-body p { color: var(--text-secondary); margin-bottom: 20px; }
.case-metrics-row { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 24px; }
.metric-box { background: var(--bg-card2); border-radius: var(--radius); padding: 16px 20px; text-align: center; border: 1px solid var(--border); }
.metric-box strong { display: block; font-size: 1.5rem; font-weight: 800; background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.metric-box span { font-size: 0.78rem; color: var(--text-muted); }

/* ===================== 新闻详情 ===================== */
.news-detail-grid { display: flex; flex-direction: column; gap: 30px; }
.news-detail-card { display: grid; grid-template-columns: 280px 1fr; gap: 24px; background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); transition: var(--transition); }
.news-detail-card:hover { border-color: var(--border-neon); box-shadow: var(--shadow-neon); }
.news-detail-card img { width: 280px; height: 100%; object-fit: cover; }
.news-detail-body { padding: 24px; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.news-meta time { font-size: 0.8rem; color: var(--text-muted); }
.news-detail-body h2 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.news-detail-body p { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; margin-bottom: 14px; }

/* ===================== 关于我们 ===================== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-text h2 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; }
.about-text p { color: var(--text-secondary); margin-bottom: 14px; }
.about-stats { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; margin-top: 28px; }
.about-stat { text-align: center; }
.about-stat strong { display: block; font-size: 1.5rem; font-weight: 800; background: var(--neon-grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.about-stat span { font-size: 0.78rem; color: var(--text-muted); }
.about-img img { border-radius: var(--radius-lg); width: 100%; }

/* ===================== 案例文章 ===================== */
.case-article img { width: 100%; border-radius: var(--radius-lg); margin-bottom: 32px; }
.case-article-body h2 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; color: var(--neon-blue); }
.case-article-body p { color: var(--text-secondary); margin-bottom: 20px; }

/* ===================== 页脚 ===================== */
.site-footer {
  background: var(--bg-card2); border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr; gap: 32px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 14px; }
.footer-desc { color: var(--text-muted); font-size: 0.82rem; line-height: 1.7; margin-bottom: 10px; }
.footer-domain { font-size: 0.8rem; color: var(--text-muted); }
.footer-links h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary); }
.footer-links ul li { margin-bottom: 8px; }
.footer-links ul li a { color: var(--text-muted); font-size: 0.82rem; }
.footer-links ul li a:hover { color: var(--neon-blue); }
.footer-contact h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 14px; }
.footer-contact p { color: var(--text-muted); font-size: 0.82rem; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; text-align: center; }
.footer-bottom p { color: var(--text-muted); font-size: 0.78rem; margin-bottom: 8px; }
.footer-tags a { color: var(--text-muted); font-size: 0.78rem; }
.footer-tags a:hover { color: var(--neon-blue); }

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-img-wrap { display: none; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .news-grid { grid-template-columns: repeat(2,1fr); }
  .tech-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    display: none; flex-direction: column; position: absolute;
    top: 64px; left: 0; right: 0; background: var(--bg-card);
    padding: 16px; border-bottom: 1px solid var(--border); z-index: 999;
  }
  .nav-menu.open { display: flex; }
  .nav-link { width: 100%; padding: 10px 16px; }
  .video-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .product-detail-card { grid-template-columns: 1fr; }
  .solution-detail-item { grid-template-columns: 1fr; }
  .solution-detail-item.reverse { direction: ltr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; }
  .process-arrow { transform: rotate(90deg); }
  .hero-btns { justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .news-detail-card { grid-template-columns: 1fr; }
  .news-detail-card img { width: 100%; height: 200px; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 480px) {
  .section { padding: 50px 0; }
  .hero-section { min-height: auto; padding: 40px 0; }
  .hero-title { font-size: 1.6rem; }
}