/* ============================================================
   云优店掌官网 - 主样式表
   设计理念：微信绿(主)+美团黄(辅) 7:3高端配色，沉稳质感SaaS企业官网风格
   ============================================================ */

:root {
  --primary: #07C160;
  --primary-dark: #05944A;
  --primary-light: #E8F8F0;
  --secondary: #FFC300;
  --secondary-light: #FFF9E6;
  --bg: #ffffff;
  --bg-secondary: #f7f8fa;
  --text: #1a1a2e;
  --text-secondary: #666;
  --text-light: #999;
  --border: #e8e8e8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1280px;
  --font-xl: clamp(2rem, 4vw, 3.2rem);
  --font-lg: clamp(1.5rem, 3vw, 2.4rem);
  --font-md: clamp(1.1rem, 2vw, 1.4rem);
  --font-base: 16px;
  --font-sm: 14px;
  --transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; font-size: var(--font-base); }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }

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

/* ==================== 导航栏 ==================== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
  height: 68px;
}
.navbar.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 700; color: var(--primary); }
.nav-logo img { height: 32px; }
.nav-logo .slogan { font-size: 13px; color: var(--text-secondary); font-weight: 400; margin-left: 8px; padding-left: 8px; border-left: 1px solid var(--border); }
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-links a {
  padding: 8px 16px; border-radius: var(--radius-sm); font-size: var(--font-sm);
  color: var(--text-secondary); transition: all var(--transition); font-weight: 500;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-cta {
  padding: 8px 20px; background: var(--primary); color: #fff !important;
  border-radius: 20px; font-size: var(--font-sm); font-weight: 600;
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--primary-dark) !important; color: #fff !important; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(7,193,96,0.3); }
.mobile-toggle { display: none; background: none; font-size: 24px; color: var(--text); }

/* ==================== Hero Banner ==================== */
.hero {
  margin-top: 68px; position: relative; overflow: hidden;
  background: linear-gradient(145deg, #F0FAF4 0%, #E8F8F0 30%, #FFFDF5 70%, #FFF9E6 100%);
  min-height: 620px; display: flex; align-items: center;
}
.hero::before {
  content: ''; position: absolute; top: -200px; right: -100px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(7,193,96,0.06) 0%, transparent 70%);
}
.hero::after {
  content: ''; position: absolute; bottom: -150px; left: -80px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,195,0,0.05) 0%, transparent 70%);
}
/* 装饰网格线 */
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(7,193,96,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7,193,96,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 70%);
}
.hero .container { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.hero-content { flex: 1; max-width: 560px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; background: rgba(7,193,96,0.08);
  color: var(--primary); font-size: 13px; font-weight: 500; border-radius: 20px;
  margin-bottom: 24px; border: 1px solid rgba(7,193,96,0.12);
}
.hero-badge::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--primary); display: inline-block;
}
.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 800; line-height: 1.25; color: var(--text);
  margin-bottom: 20px; letter-spacing: -0.02em;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, #05944A 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: var(--text-secondary); margin-bottom: 36px; line-height: 1.8;
  max-width: 480px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: nowrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 13px 30px; border-radius: 28px;
  font-size: 15px; font-weight: 600;
  transition: all var(--transition); white-space: nowrap;
}
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 16px rgba(7,193,96,0.3);
}
.btn-primary:hover {
  background: var(--primary-dark); transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(7,193,96,0.4);
}
.btn-outline {
  background: transparent; color: var(--primary); border: 1.5px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary); color: #fff; transform: translateY(-2px);
}
.btn-ghost {
  background: transparent; color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--primary); color: var(--primary);
  background: var(--primary-light); transform: translateY(-2px);
}
.btn-secondary { background: var(--secondary); color: #333; }
.btn-secondary:hover { background: #E0A800; color: #333; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,195,0,0.35); }

/* 右侧视觉区 */
.hero-visual {
  flex: 1; position: relative; max-width: 500px;
  display: flex; align-items: center; justify-content: center;
}
.hero-visual .screen-mockup {
  width: 100%; aspect-ratio: 4/3; background: #fff; border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(7,193,96,0.12), 0 0 0 1px rgba(7,193,96,0.06);
  overflow: hidden; position: relative;
}
.hero-visual .screen-mockup .mockup-header {
  height: 36px; background: linear-gradient(180deg, #fafafa, #f5f5f5);
  display: flex; align-items: center; gap: 6px; padding: 0 16px;
  border-bottom: 1px solid #eee;
}
.hero-visual .screen-mockup .mockup-dot { width: 8px; height: 8px; border-radius: 50%; }
.hero-visual .screen-mockup .mockup-dot:nth-child(1) { background: #ff5f57; }
.hero-visual .screen-mockup .mockup-dot:nth-child(2) { background: #ffbd2e; }
.hero-visual .screen-mockup .mockup-dot:nth-child(3) { background: #28ca41; }
.hero-visual .screen-mockup .mockup-body {
  padding: 24px; display: flex; flex-direction: column; gap: 14px;
}
.hero-visual .screen-mockup .mockup-card {
  height: 14px; background: linear-gradient(90deg, #E8F8F0, #f0f9f4); border-radius: 6px;
}
.hero-visual .screen-mockup .mockup-card:nth-child(1) { width: 65%; }
.hero-visual .screen-mockup .mockup-card:nth-child(2) { width: 85%; }
.hero-visual .screen-mockup .mockup-card:nth-child(3) { width: 45%; }
.hero-visual .screen-mockup .mockup-card:nth-child(4) { width: 75%; }
.hero-visual .screen-mockup .mockup-card:nth-child(5) { width: 55%; }

/* Banner 轮播指示器 */
.banner-dots {
  position: absolute; bottom: 32px; left: 0; right: 0; z-index: 2;
  display: flex; gap: 8px; justify-content: center; align-items: center;
}
.banner-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(7,193,96,0.25); transition: all var(--transition); cursor: pointer;
}
.banner-dot:hover { background: rgba(7,193,96,0.5); }
.banner-dot.active { background: var(--primary); width: 32px; border-radius: 5px; }

/* ==================== 公告栏 ==================== */
.announcement-bar {
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 14px 0; position: relative;
}
.announcement-bar::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
}
.announcement-bar .container {
  display: flex; gap: 32px; overflow-x: auto; padding: 0 24px;
  scrollbar-width: none; -ms-overflow-style: none;
}
.announcement-bar .container::-webkit-scrollbar { display: none; }
.announcement-item {
  display: flex; align-items: center; gap: 8px; white-space: nowrap;
  font-size: var(--font-sm); color: var(--text-secondary); transition: color var(--transition);
  flex-shrink: 0;
}
.announcement-item:hover { color: var(--primary); }
.announcement-item .ann-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--secondary); flex-shrink: 0;
}
.announcement-item .ann-icon { color: var(--secondary); flex-shrink: 0; font-size: 16px; }

/* ==================== 通用区块样式 ==================== */
.section { padding: 80px 0; }
.section-gray { background: var(--bg-secondary); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-label { display: inline-block; padding: 4px 14px; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600; border-radius: 20px; margin-bottom: 12px; }
.section-title { font-size: var(--font-lg); font-weight: 700; color: var(--text); margin-bottom: 12px; }
.section-desc { font-size: var(--font-base); color: var(--text-secondary); max-width: 700px; margin: 0 auto; line-height: 1.7; }

/* ==================== 产品卡片 ==================== */
.products-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.product-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: all var(--transition); position: relative; overflow: hidden;
  display: flex; flex-direction: column;
}
.product-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0; transition: opacity var(--transition);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card:hover::before { opacity: 1; }
.product-tag { display: inline-block; padding: 2px 10px; background: var(--primary-light); color: var(--primary); font-size: 12px; font-weight: 600; border-radius: 10px; margin-bottom: 12px; align-self: flex-start; }
.product-name { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.product-desc { font-size: var(--font-sm); color: var(--text-secondary); line-height: 1.6; margin-bottom: 20px; flex: 1; }
.product-actions { display: flex; gap: 10px; margin-top: auto; }
.product-actions .btn { font-size: 13px; padding: 8px 18px; }

/* ==================== 行业方案 ==================== */
.industry-tabs { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 40px; }
.industry-tab {
  padding: 8px 20px; border-radius: 20px; font-size: var(--font-sm); font-weight: 500;
  color: var(--text-secondary); background: transparent; transition: all var(--transition); cursor: pointer; border: 1px solid transparent;
}
.industry-tab:hover { color: var(--primary); background: var(--primary-light); }
.industry-tab.active { background: var(--primary); color: #fff; font-weight: 600; }
.industry-content { display: none; }
.industry-content.active { display: block; animation: fadeInUp 0.4s ease; }
.industry-detail {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 40px; text-align: center; max-width: 900px; margin: 0 auto;
}
.industry-detail h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.industry-detail .industry-summary { font-size: var(--font-base); color: var(--text-secondary); margin-bottom: 24px; line-height: 1.7; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 28px; }
.feature-tag {
  padding: 6px 16px; background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 20px; font-size: 13px; color: var(--text-secondary); transition: all var(--transition);
}
.feature-tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* ==================== 案例区域 ==================== */
.cases-wrap { display: flex; gap: 32px; }
.cases-categories { display: flex; flex-direction: column; gap: 4px; min-width: 140px; }
.cases-cat {
  padding: 10px 16px; border-radius: var(--radius-sm); font-size: var(--font-sm);
  font-weight: 500; color: var(--text-secondary); background: transparent;
  text-align: left; transition: all var(--transition);
}
.cases-cat:hover { color: var(--primary); background: var(--primary-light); }
.cases-cat.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.cases-slider { flex: 1; overflow: hidden; }
.cases-group { display: none; }
.cases-group.active { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; animation: fadeInUp 0.4s ease; }
.case-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; transition: all var(--transition);
}
.case-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.case-brand { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.case-desc { font-size: var(--font-sm); color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.case-metrics { display: flex; gap: 24px; flex-wrap: wrap; }
.case-metric { text-align: center; }
.case-metric .metric-num { font-size: 24px; font-weight: 800; color: var(--secondary); }
.case-metric .metric-label { font-size: 12px; color: var(--text-light); margin-top: 2px; }

/* ==================== 服务能力 ==================== */
.services-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.service-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 20px; text-align: center; transition: all var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.service-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; background: var(--primary-light);
  border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 24px;
}
.service-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 12px; }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 12px; }
.service-tag {
  padding: 3px 10px; background: var(--bg-secondary); border-radius: 12px;
  font-size: 12px; color: var(--text-secondary);
}
.service-desc { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ==================== 应用生态 ==================== */
.apps-wrap { display: flex; gap: 24px; }
.apps-main {
  flex: 0 0 300px; background: linear-gradient(135deg, var(--primary) 0%, #05944A 100%);
  border-radius: var(--radius-lg); padding: 36px 28px; color: #fff;
}
.apps-main h3 { font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.apps-main .apps-big-num { font-size: 48px; font-weight: 800; line-height: 1; margin: 16px 0 4px; }
.apps-main .apps-big-label { font-size: 14px; opacity: 0.85; }
.apps-main .apps-advantages { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.apps-adv-item { display: flex; align-items: center; gap: 8px; font-size: 13px; opacity: 0.9; }
.apps-main .btn { margin-top: 24px; width: 100%; justify-content: center; }
.apps-grid { flex: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.app-category-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 16px; transition: all var(--transition);
}
.app-category-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.app-category-card h4 { font-size: 14px; font-weight: 600; margin-bottom: 10px; color: var(--primary); }
.app-category-card .app-list { display: flex; flex-direction: column; gap: 4px; }
.app-category-card .app-item { font-size: 12px; color: var(--text-light); }

/* ==================== 全国网络 ==================== */
.network-info { display: flex; gap: 80px; align-items: center; justify-content: center; }
.network-stats { display: flex; gap: 40px; }
.network-stat { text-align: center; }
.network-stat .stat-num { font-size: 48px; font-weight: 800; color: var(--primary); line-height: 1; }
.network-stat .stat-label { font-size: 15px; color: var(--text-secondary); margin-top: 8px; }
.network-map { flex: 1; max-width: 600px; }
.network-map .map-placeholder {
  width: 100%; aspect-ratio: 16/9; background: var(--bg-secondary); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 14px;
  border: 2px dashed var(--border);
}

/* ==================== WOS专区 ==================== */
.wos-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.wos-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 24px; text-align: center; transition: all var(--transition);
}
.wos-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.wos-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-light), rgba(7,193,96,0.18));
  display: flex; align-items: center; justify-content: center; font-size: 28px;
}
.wos-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.wos-card p { font-size: 14px; color: var(--text-secondary); }

/* ==================== 技术实力 ==================== */
.tech-metrics { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.tech-metric { text-align: center; min-width: 140px; }
.tech-metric .metric-value { font-size: 36px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.tech-metric .metric-label { font-size: 14px; color: var(--text-secondary); margin-top: 6px; }
.tech-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.tech-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px 20px; transition: all var(--transition);
}
.tech-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--primary); }
.tech-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.tech-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ==================== 证书 ==================== */
.certs-grid { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.cert-card {
  padding: 16px 24px; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); font-size: 14px; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition); text-align: center;
}
.cert-card:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ==================== 动态 ==================== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-col { background: var(--bg); border-radius: var(--radius); overflow: hidden; }
.news-col-header {
  padding: 20px 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px;
}
.news-col-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; font-size: 16px; color: var(--primary); }
.news-col-title { font-size: 14px; font-weight: 700; color: var(--text); }
.news-col-sub { font-size: 12px; color: var(--text-light); }
.news-list { padding: 12px 24px 20px; display: flex; flex-direction: column; gap: 14px; }
.news-item { display: flex; gap: 10px; align-items: baseline; }
.news-date { font-size: 12px; color: var(--text-light); white-space: nowrap; flex-shrink: 0; }
.news-title { font-size: 14px; color: var(--text); line-height: 1.5; transition: color var(--transition); }
.news-item:hover .news-title { color: var(--primary); }

/* ==================== CTA区域 ==================== */
.cta { background: linear-gradient(135deg, var(--primary) 0%, #05944A 50%, var(--secondary) 100%); padding: 64px 0; text-align: center; }
.cta h2 { font-size: var(--font-lg); color: #fff; font-weight: 700; margin-bottom: 32px; }
.cta .btn { font-size: 17px; padding: 14px 40px; }

/* ==================== 页脚 ==================== */
.footer { background: #1a1a2e; color: rgba(255,255,255,0.7); padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-bottom: 40px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,0.55); transition: color var(--transition); }
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px;
  text-align: center; font-size: 13px; color: rgba(255,255,255,0.4);
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* ==================== 弹窗样式（表单） ==================== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center; animation: fadeIn 0.2s ease;
}
.modal {
  background: var(--bg); border-radius: var(--radius-lg); padding: 36px 32px;
  max-width: 440px; width: 90%; position: relative; box-shadow: var(--shadow-lg);
}
.modal-close { position: absolute; top: 12px; right: 16px; background: none; font-size: 20px; color: var(--text-light); }
.modal h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text); }
.form-group input {
  width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: var(--font-sm); transition: border-color var(--transition); outline: none;
}
.form-group input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(7,193,96,0.1); }
.form-group .btn { width: 100%; justify-content: center; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(3, 1fr); }
  .apps-wrap { flex-direction: column; }
  .apps-main { flex: none; }
  .apps-grid { grid-template-columns: repeat(3, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .cases-wrap { flex-direction: column; }
  .cases-categories { flex-direction: row; flex-wrap: wrap; }
  .network-info { flex-direction: column; gap: 40px; }
  .hero .container { flex-direction: column; text-align: center; gap: 32px; }
  .hero-content { max-width: 100%; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-visual { max-width: 420px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .products-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .apps-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: 1fr; }
  .wos-grid { grid-template-columns: 1fr; }
  .cases-group.active { grid-template-columns: 1fr; }
  .tech-metrics { gap: 20px; }
  .section { padding: 48px 0; }
  .hero { min-height: 500px; }
  .hero-grid { display: none; }
  .hero-btns { flex-wrap: wrap; }
  .btn { padding: 12px 24px; font-size: 14px; }
}