/* 91网 - 全站样式 | 深空黑+霓虹蓝紫渐变科技风 */
:root {
  --bg-dark: #080c14;
  --bg-card: #0d1525;
  --bg-card2: #111a2e;
  --neon-blue: #00d4ff;
  --neon-purple: #9b59ff;
  --neon-pink: #ff3cac;
  --grad-main: linear-gradient(135deg, #00d4ff 0%, #9b59ff 100%);
  --grad-hero: linear-gradient(135deg, #080c14 0%, #0d1a3a 50%, #1a0d3a 100%);
  --text-main: #e8f0fe;
  --text-muted: #8899bb;
  --border-glow: rgba(0, 212, 255, 0.2);
  --shadow-neon: 0 0 20px rgba(0, 212, 255, 0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::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-main);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--neon-blue); border-radius: 3px; }

/* 链接 */
a { color: var(--neon-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--neon-purple); }

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

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ===== 导航栏 ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(8, 12, 20, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glow);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding: 0 30px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-text {
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-badge {
  font-size: 0.65rem;
  background: var(--grad-main);
  color: #fff;
  padding: 2px 8px;
  border-radius: 20px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.main-nav { display: flex; align-items: center; gap: 8px; }

.main-nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 6px 14px;
  border-radius: 6px;
  transition: var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.08);
}

.nav-cta {
  background: var(--grad-main) !important;
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 8px !important;
  font-weight: 600 !important;
}

.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

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

.hamburger span {
  width: 24px; height: 2px;
  background: var(--neon-blue);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== 搜索栏 ===== */
.search-bar-wrapper {
  background: rgba(13, 21, 37, 0.95);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  padding: 10px 30px;
}

.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glow);
  border-radius: 30px;
  padding: 8px 20px;
  transition: var(--transition);
}

.search-bar-inner:focus-within {
  border-color: var(--neon-blue);
  box-shadow: var(--shadow-neon);
}

.search-bar-inner input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: inherit;
}

.search-bar-inner input::placeholder { color: var(--text-muted); }

.search-icon {
  color: var(--neon-blue);
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
}

.search-icon:hover { color: var(--neon-purple); }

/* ===== Hero Banner ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--grad-hero);
  padding-top: 130px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../assets/images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8,12,20,0.85) 0%, rgba(8,12,20,0.4) 60%, rgba(8,12,20,0.7) 100%);
  z-index: 1;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  animation: float-particle linear infinite;
}

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

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 30px;
  padding: 6px 18px;
  font-size: 0.8rem;
  color: var(--neon-blue);
  margin-bottom: 24px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-tag::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--neon-blue);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero-title {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title .brand-highlight {
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 560px;
  line-height: 1.8;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-main);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1rem;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
  color: #fff;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--neon-blue);
  padding: 13px 30px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--neon-blue);
  transition: var(--transition);
  cursor: pointer;
}

.btn-outline:hover {
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-3px);
  color: var(--neon-blue);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 50px;
  flex-wrap: wrap;
}

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

.stat-num {
  font-size: 2rem;
  font-weight: 900;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* ===== 通用区块 ===== */
.section { padding: 90px 0; }
.section-sm { padding: 60px 0; }

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

.section-tag {
  display: inline-block;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--neon-blue);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-title .accent {
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--grad-main);
  transform: scaleX(0);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 20px 50px rgba(0, 212, 255, 0.15);
}

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

.card-icon {
  width: 56px; height: 56px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

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

/* ===== 网格布局 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }

/* ===== 视频卡片 ===== */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-glow);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.2);
  border-color: rgba(0, 212, 255, 0.4);
}

.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #0a0f1e;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

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

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: var(--transition);
}

.video-card:hover .video-play-btn { opacity: 1; }

.play-icon {
  width: 56px; height: 56px;
  background: rgba(0, 212, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}

.video-card:hover .play-icon { transform: scale(1); }

.play-icon::after {
  content: '';
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-tag {
  position: absolute;
  top: 8px; left: 8px;
  background: var(--grad-main);
  color: #fff;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 4px;
  font-weight: 600;
}

.video-info { padding: 14px; }

.video-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ===== 产品矩阵 ===== */
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.4);
}

.product-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-body { padding: 24px; }

.product-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.product-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-features { display: flex; flex-wrap: wrap; gap: 8px; }

.feature-tag {
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  color: var(--neon-blue);
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
}

/* ===== 技术引擎 ===== */
.tech-section { background: var(--bg-card2); }

.tech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }

.tech-item {
  background: var(--bg-card);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}

.tech-item:hover {
  background: rgba(0, 212, 255, 0.05);
  z-index: 1;
}

.tech-num {
  font-size: 3rem;
  font-weight: 900;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.tech-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.tech-desc { font-size: 0.82rem; color: var(--text-muted); }

/* ===== 解决方案 ===== */
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: var(--transition);
}

.solution-card:hover {
  border-color: rgba(0, 212, 255, 0.4);
  transform: translateX(6px);
  box-shadow: -4px 0 20px rgba(0, 212, 255, 0.15);
}

.solution-icon {
  flex-shrink: 0;
  width: 60px; height: 60px;
  background: var(--grad-main);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.solution-body {}

.solution-industry {
  font-size: 0.75rem;
  color: var(--neon-blue);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.solution-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.solution-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }

/* ===== 流程步骤 ===== */
.process-steps { display: flex; gap: 0; position: relative; }

.process-steps::before {
  content: '';
  position: absolute;
  top: 40px; left: 60px; right: 60px;
  height: 2px;
  background: var(--grad-main);
  opacity: 0.3;
}

.step-item {
  flex: 1;
  text-align: center;
  padding: 0 20px;
  position: relative;
}

.step-num {
  width: 80px; height: 80px;
  background: var(--bg-card);
  border: 2px solid var(--neon-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 900;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  background-color: var(--bg-card);
}

.step-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-desc { font-size: 0.83rem; color: var(--text-muted); line-height: 1.6; }

/* ===== 案例 ===== */
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.case-card:hover {
  border-color: rgba(155, 89, 255, 0.4);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(155, 89, 255, 0.15);
}

.case-client {
  font-size: 0.78rem;
  color: var(--neon-purple);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.case-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}

.case-desc { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }

.case-metrics {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border-glow);
}

.metric { text-align: center; }

.metric-val {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--grad-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.metric-label { font-size: 0.75rem; color: var(--text-muted); }

/* ===== 动态新闻 ===== */
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.4);
}

.news-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.news-body { padding: 20px; }

.news-cat {
  font-size: 0.72rem;
  color: var(--neon-blue);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.news-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-excerpt {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.news-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
}

/* ===== 用户评价 ===== */
.review-section { background: var(--bg-card2); }

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
  transform: translateY(-4px);
}

.review-stars {
  color: #ffd700;
  font-size: 1rem;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

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

.reviewer-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--grad-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}

.reviewer-name { font-size: 0.9rem; font-weight: 600; color: var(--text-main); }
.reviewer-role { font-size: 0.78rem; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open { border-color: rgba(0, 212, 255, 0.4); }

.faq-question {
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-main);
  transition: var(--transition);
}

.faq-question:hover { color: var(--neon-blue); }

.faq-arrow {
  width: 24px; height: 24px;
  border: 1px solid var(--border-glow);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  transition: var(--transition);
  flex-shrink: 0;
  color: var(--neon-blue);
}

.faq-item.open .faq-arrow { transform: rotate(180deg); background: rgba(0,212,255,0.1); }

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== 联系我们 ===== */
.contact-section {}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }

.contact-info { }

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.contact-icon {
  width: 44px; height: 44px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-value { font-size: 0.95rem; color: var(--text-main); font-weight: 500; }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.form-group { margin-bottom: 20px; }

.form-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glow);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 0.9rem;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.form-input:focus {
  border-color: var(--neon-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-input::placeholder { color: var(--text-muted); }

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

/* ===== 页脚 ===== */
.site-footer {
  background: #050810;
  border-top: 1px solid var(--border-glow);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand .logo { margin-bottom: 16px; }

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-domain {
  font-size: 0.82rem;
  color: var(--neon-blue);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: 6px 14px;
  border-radius: 6px;
  display: inline-block;
}

.footer-col-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-glow);
}

.footer-links { list-style: none; }

.footer-links li { margin-bottom: 10px; }

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-glow);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-update {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 100px 0 20px;
  background: var(--bg-card2);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb-inner a { color: var(--text-muted); }
.breadcrumb-inner a:hover { color: var(--neon-blue); }
.breadcrumb-inner .sep { color: var(--border-glow); }
.breadcrumb-inner .current { color: var(--neon-blue); }

/* ===== 内页Hero ===== */
.page-hero {
  padding: 130px 0 70px;
  background: var(--grad-hero);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
}

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

.page-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
}

.page-hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ===== 动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* ===== 移动端适配 ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: rgba(8, 12, 20, 0.98);
    padding: 20px;
    border-bottom: 1px solid var(--border-glow);
    z-index: 999;
  }
  .hamburger { display: flex; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; }
  .process-steps::before { display: none; }
  .hero-stats { gap: 20px; }
  .header-inner { padding: 0 16px; }
  .search-bar-wrapper { padding: 10px 16px; }
  .tech-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}

/* ===== 霓虹发光线条装饰 ===== */
.glow-line {
  height: 1px;
  background: var(--grad-main);
  opacity: 0.4;
  margin: 0;
}

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  background: rgba(155, 89, 255, 0.1);
  border: 1px solid rgba(155, 89, 255, 0.3);
  color: var(--neon-purple);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 4px;
  margin: 3px;
}

/* ===== 分割线 ===== */
.divider {
  height: 1px;
  background: var(--border-glow);
  margin: 40px 0;
}

/* ===== 内页侧边栏 ===== */
.inner-layout { display: grid; grid-template-columns: 1fr 280px; gap: 40px; align-items: start; }

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-glow);
}

@media (max-width: 900px) {
  .inner-layout { grid-template-columns: 1fr; }
}