/* ===== 糖心Vlog 官方网站样式 ===== */
:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --secondary: #06b6d4;
  --accent: #f472b6;
  --bg-dark: #0a0a14;
  --bg-card: #12122a;
  --bg-card2: #1a1a35;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --border: rgba(124,58,237,0.25);
  --glow-blue: rgba(6,182,212,0.15);
  --glow-purple: rgba(124,58,237,0.2);
  --gradient-main: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
  --gradient-card: linear-gradient(135deg, #12122a 0%, #1a1a35 100%);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

*, *::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: var(--font-main);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--primary-light); text-decoration: none; transition: color .2s; }
a:hover { color: var(--secondary); }

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

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

/* ===== 通用容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 56px;
  font-size: 1rem;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .25s;
  border: none;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(124,58,237,0.55);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--primary-light);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 导航 ===== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,10,20,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all .3s;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 24px;
  max-width: 1280px;
  margin: 0 auto;
}
.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: .5px;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-menu a {
  color: var(--text-main);
  font-size: .92rem;
  font-weight: 500;
  position: relative;
  padding-bottom: 4px;
}
.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--gradient-main);
  transition: width .25s;
}
.nav-menu a:hover::after { width: 100%; }
.nav-menu a:hover { color: var(--primary-light); }
.nav-cta { margin-left: 16px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s;
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: rgba(18,18,42,0.95);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-input {
  flex: 1;
  max-width: 480px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 8px 20px;
  color: var(--text-main);
  font-size: .9rem;
  outline: none;
  transition: border-color .2s;
}
.search-input::placeholder { color: var(--text-muted); }
.search-input:focus { border-color: var(--primary); }
.search-btn {
  padding: 8px 20px;
  border-radius: 50px;
  background: var(--gradient-main);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: .9rem;
  font-weight: 600;
  transition: opacity .2s;
}
.search-btn:hover { opacity: .85; }

/* ===== Hero Banner ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 120px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--bg-dark);
  z-index: 0;
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .22;
  z-index: 1;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,10,20,.85) 0%, rgba(10,10,20,.5) 100%);
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 3;
  max-width: 700px;
}
.hero-tag {
  display: inline-block;
  background: rgba(124,58,237,0.2);
  border: 1px solid rgba(124,58,237,0.4);
  color: var(--primary-light);
  padding: 5px 16px;
  border-radius: 50px;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: #fff;
}
.hero h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  max-width: 560px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat-label { font-size: .82rem; color: var(--text-muted); margin-top: 4px; }

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(124,58,237,0.3);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: background .3s;
  opacity: 0;
  transition: opacity .3s;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.45); }
.play-icon {
  width: 60px; height: 60px;
  background: rgba(124,58,237,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transition: transform .2s;
}
.video-card:hover .play-icon { transform: scale(1.1); }
.play-icon svg { width: 24px; height: 24px; fill: #fff; margin-left: 3px; }
.video-meta { padding: 16px; }
.video-title {
  font-size: .95rem;
  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-stats {
  display: flex;
  gap: 16px;
  font-size: .8rem;
  color: var(--text-muted);
}
.video-stats span { display: flex; align-items: center; gap: 4px; }
.video-tag {
  display: inline-block;
  background: rgba(124,58,237,0.15);
  color: var(--primary-light);
  padding: 2px 10px;
  border-radius: 50px;
  font-size: .75rem;
  margin-bottom: 8px;
}

/* ===== 产品卡片 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: transform .3s, box-shadow .3s;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(124,58,237,0.25);
}
.product-img { aspect-ratio: 4/3; overflow: hidden; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-body { padding: 24px; }
.product-name {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
}
.product-desc { font-size: .9rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }
.product-features { display: flex; flex-wrap: wrap; gap: 8px; }
.feature-tag {
  background: rgba(6,182,212,0.1);
  border: 1px solid rgba(6,182,212,0.25);
  color: var(--secondary);
  padding: 3px 12px;
  border-radius: 50px;
  font-size: .78rem;
}

/* ===== 技术引擎 ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: all .3s;
  position: relative;
  overflow: hidden;
}
.tech-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: transform .3s;
}
.tech-card:hover::before { transform: scaleX(1); }
.tech-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 32px rgba(124,58,237,0.2);
  border-color: rgba(124,58,237,0.4);
}
.tech-icon {
  width: 64px; height: 64px;
  background: var(--glow-purple);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}
.tech-name { font-size: 1rem; font-weight: 700; margin-bottom: 10px; color: #fff; }
.tech-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }

/* ===== 解决方案 ===== */
.solution-list { display: flex; flex-direction: column; gap: 24px; }
.solution-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: box-shadow .3s;
}
.solution-item:hover { box-shadow: 0 12px 40px rgba(124,58,237,0.2); }
.solution-item.reverse { direction: rtl; }
.solution-item.reverse > * { direction: ltr; }
.solution-img { aspect-ratio: 4/3; overflow: hidden; }
.solution-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.solution-item:hover .solution-img img { transform: scale(1.04); }
.solution-body { padding: 40px; }
.solution-num {
  font-size: .8rem;
  font-weight: 700;
  color: var(--primary-light);
  letter-spacing: 2px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.solution-name { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 14px; }
.solution-desc { font-size: .9rem; color: var(--text-muted); line-height: 1.7; }

/* ===== 流程 ===== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 40px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
  z-index: 0;
}
.process-step {
  text-align: center;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 80px; height: 80px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin: 0 auto 20px;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}
.step-title { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step-desc { font-size: .82rem; color: var(--text-muted); line-height: 1.6; }

/* ===== 案例 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  transition: all .3s;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(124,58,237,0.2);
  border-color: rgba(124,58,237,0.4);
}
.case-tag {
  display: inline-block;
  background: var(--gradient-main);
  color: #fff;
  padding: 3px 14px;
  border-radius: 50px;
  font-size: .78rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.case-name { font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
.case-desc { font-size: .88rem; color: var(--text-muted); line-height: 1.7; }

/* ===== 动态新闻 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all .3s;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(124,58,237,0.2);
}
.news-img { aspect-ratio: 16/9; overflow: hidden; }
.news-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.news-card:hover .news-img img { transform: scale(1.05); }
.news-body { padding: 20px; }
.news-date { font-size: .78rem; color: var(--text-muted); margin-bottom: 8px; }
.news-title { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 8px; line-height: 1.4; }
.news-excerpt { font-size: .85rem; color: var(--text-muted); line-height: 1.6; }

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: all .3s;
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 16px; right: 20px;
  font-size: 4rem;
  color: rgba(124,58,237,0.15);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(124,58,237,0.15);
}
.review-stars { color: #fbbf24; font-size: 1rem; margin-bottom: 12px; }
.review-text { font-size: .9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: .9rem; font-weight: 700; color: #fff; }
.review-role { font-size: .78rem; color: var(--text-muted); }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s;
}
.faq-item.open { border-color: rgba(124,58,237,0.5); }
.faq-q {
  padding: 20px 24px;
  font-size: .95rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  transition: background .2s;
}
.faq-q:hover { background: var(--bg-card2); }
.faq-icon {
  width: 24px; height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(124,58,237,0.2);
  border-radius: 50%;
  color: var(--primary-light);
  font-size: 1rem;
  transition: transform .3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .3s;
  background: var(--bg-card2);
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.7;
  padding: 0 24px;
}
.faq-item.open .faq-a { max-height: 200px; padding: 16px 24px 20px; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.contact-icon {
  width: 44px; height: 44px;
  background: var(--glow-purple);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-label { font-size: .8rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-val { font-size: .95rem; font-weight: 600; color: #fff; }
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
}
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: .85rem; color: var(--text-muted); margin-bottom: 8px; }
.form-input, .form-textarea {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  color: var(--text-main);
  font-size: .9rem;
  font-family: var(--font-main);
  outline: none;
  transition: border-color .2s;
}
.form-input:focus, .form-textarea:focus { border-color: var(--primary); }
.form-textarea { height: 120px; resize: vertical; }

/* ===== 页脚 ===== */
footer {
  background: #07071a;
  border-top: 1px solid var(--border);
  padding: 60px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand-desc { font-size: .85rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
.footer-col-title { font-size: .9rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: .85rem; color: var(--text-muted); transition: color .2s; }
.footer-links a:hover { color: var(--primary-light); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: .82rem;
  color: var(--text-muted);
}
.footer-icp a { color: var(--text-muted); }
.footer-icp a:hover { color: var(--primary-light); }

/* ===== 内页 Banner ===== */
.inner-banner {
  padding: 140px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, rgba(124,58,237,0.08) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
}
.inner-banner h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.inner-banner p { font-size: 1rem; color: var(--text-muted); max-width: 560px; margin: 0 auto; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  margin-bottom: 20px;
  font-size: .85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--primary-light); }
.breadcrumb span { color: var(--text-muted); }

/* ===== 合作伙伴 ===== */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  align-items: center;
}
.partner-logo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 28px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all .2s;
}
.partner-logo:hover { border-color: var(--primary); color: var(--primary-light); }

/* ===== 弹窗视频播放 ===== */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
}
.video-modal.active { display: flex; }
.video-modal-inner {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 24px;
  max-width: 720px;
  width: 90%;
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: -16px; right: -16px;
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  font-size: 1.1rem;
  border: none;
}
.video-placeholder {
  aspect-ratio: 16/9;
  background: #000;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: .9rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .solution-item { grid-template-columns: 1fr; }
  .solution-item.reverse { direction: ltr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(10,10,20,0.98); padding: 20px; gap: 16px; border-bottom: 1px solid var(--border); }
  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .hero { padding-top: 140px; }
  .hero h1 { font-size: 1.9rem; }
  .hero-stats { gap: 24px; }
  .process-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 60px 0; }
  .solution-body { padding: 24px; }
}

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

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(124,58,237,0.3); }
  50% { box-shadow: 0 0 40px rgba(124,58,237,0.6); }
}
.fade-in-up { animation: fadeInUp .6s ease forwards; }
.pulse-glow { animation: pulse-glow 2.5s ease-in-out infinite; }

/* ===== 辅助类 ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 32px; }
.mb-8 { margin-bottom: 32px; }
.gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 60px 0;
}