/* ============================================================
   启动立科技官网 - 主样式
   ============================================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #0066ff;
  --primary-light: #3385ff;
  --primary-dark: #0044cc;
  --accent: #00d4ff;
  --accent2: #7c3aed;
  --bg-dark: #060c1a;
  --bg-card: #0d1b2e;
  --bg-card2: #0f2040;
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(255, 255, 255, 0.08);
  --gradient-main: linear-gradient(135deg, #0066ff 0%, #00d4ff 100%);
  --gradient-hero: linear-gradient(180deg, #060c1a 0%, #0a1628 100%);
  --shadow-card: 0 8px 32px rgba(0, 102, 255, 0.12);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Section Header ---------- */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  margin: 12px 0 16px;
  line-height: 1.3;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
}
.section-header.light h2, .section-header.light p { color: var(--text-primary); }
.section-header.light p { color: rgba(255,255,255,0.7); }
.section-tag {
  display: inline-block;
  background: rgba(0,102,255,0.15);
  color: var(--accent);
  border: 1px solid rgba(0,212,255,0.3);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  font-weight: 600;
}
.highlight { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,102,255,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,102,255,0.5); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  padding: 13px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.6); }
.btn-full { width: 100%; justify-content: center; border-radius: var(--radius-sm); }

/* ============================================================
   导航栏
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(6,12,26,0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.logo-icon {
  width: 40px; height: 40px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.logo-name {
  display: block;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}
.logo-en {
  display: block;
  font-size: 0.62rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.nav-links a:hover { color: #fff; background: rgba(255,255,255,0.07); }
.nav-links .nav-btn {
  background: var(--gradient-main);
  color: #fff;
  padding: 8px 20px;
  border-radius: 50px;
  font-weight: 600;
}
.nav-links .nav-btn:hover { opacity: 0.9; background: rgba(255,255,255,0.07); }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   Hero 首屏
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
  background: var(--gradient-hero);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,102,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,102,255,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 30%, transparent 100%);
}
.hero-particle {
  position: absolute;
  inset: 0;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.82rem;
  color: var(--accent);
  margin-bottom: 28px;
  animation: fadeInDown 0.6s ease;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: blink 1.4s ease infinite;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

.hero-title {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  animation: fadeInUp 0.7s 0.1s ease both;
}
.hero-desc {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  max-width: 640px;
  margin: 0 auto 36px;
  animation: fadeInUp 0.7s 0.2s ease both;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  animation: fadeInUp 0.7s 0.3s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px 40px;
  animation: fadeInUp 0.7s 0.4s ease both;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 40px;
}
.stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-item > span:nth-child(2) { font-weight: 700; font-size: 1rem; color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--text-secondary); margin-top: 4px; }
.stat-divider {
  width: 1px; height: 50px;
  background: var(--border);
  flex-shrink: 0;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  animation: fadeIn 1s 1s ease both;
}
.scroll-arrow {
  width: 20px; height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: bounce 1.5s ease infinite;
}
@keyframes bounce { 0%,100% { transform: rotate(45deg) translateY(0); } 50% { transform: rotate(45deg) translateY(5px); } }

/* ============================================================
   优势板块
   ============================================================ */
.advantages {
  padding: 100px 0;
  background: var(--bg-dark);
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.adv-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transition: var(--transition);
}
.adv-card:hover { transform: translateY(-4px); border-color: rgba(0,102,255,0.3); box-shadow: var(--shadow-card); }
.adv-card:hover::before { transform: scaleX(1); }
.adv-icon-wrap {
  width: 56px; height: 56px;
  background: rgba(0,102,255,0.12);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  color: var(--primary-light);
  margin-bottom: 20px;
  transition: var(--transition);
}
.adv-card:hover .adv-icon-wrap { background: rgba(0,102,255,0.25); color: var(--accent); }
.adv-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; }
.adv-card p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; }

/* ============================================================
   产品中心
   ============================================================ */
.products {
  padding: 100px 0;
  background: var(--bg-card);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.product-card {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); border-color: rgba(0,102,255,0.4); box-shadow: 0 20px 60px rgba(0,102,255,0.15); }
.product-card.featured {
  border-color: rgba(0,102,255,0.5);
  background: linear-gradient(160deg, #0a1628 0%, #0d1f45 100%);
}
.product-badge {
  position: absolute;
  top: -1px; right: 20px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 0 0 8px 8px;
}
.product-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, rgba(0,102,255,0.2), rgba(0,212,255,0.1));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 20px;
}
.product-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.product-sub { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.08em; margin-bottom: 14px; }
.product-desc { color: var(--text-secondary); font-size: 0.88rem; line-height: 1.7; margin-bottom: 20px; flex: 1; }
.product-features {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.product-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
}
.product-features li i { color: var(--accent); font-size: 0.7rem; }
.product-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: 50px;
  border: 1.5px solid rgba(0,102,255,0.5);
  color: var(--primary-light);
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
}
.product-card.featured .product-btn { background: var(--gradient-main); border-color: transparent; color: #fff; }
.product-btn:hover { background: var(--gradient-main); border-color: transparent; color: #fff; }

/* ============================================================
   行业方案
   ============================================================ */
.solutions {
  padding: 100px 0;
  background: var(--bg-dark);
}
.solution-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
  justify-content: center;
}
.tab-btn {
  padding: 9px 22px;
  border-radius: 50px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary-light); }
.tab-btn.active { background: var(--gradient-main); border-color: transparent; color: #fff; font-weight: 600; }
.solution-panel { display: none; }
.solution-panel.active { display: block; animation: fadeIn 0.4s ease; }
.sol-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
}
.sol-text h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 16px; }
.sol-text p { color: var(--text-secondary); margin-bottom: 24px; font-size: 0.95rem; line-height: 1.8; }
.sol-list { margin-bottom: 32px; display: flex; flex-direction: column; gap: 10px; }
.sol-list li { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; }
.sol-list li i { color: var(--accent); font-size: 0.6rem; }
/* Mockup */
.sol-visual { display: flex; justify-content: center; align-items: center; }
.sol-mockup { width: 100%; max-width: 320px; }
.mockup-screen {
  background: #080f1e;
  border: 1px solid rgba(0,102,255,0.25);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
}
.mockup-bar {
  height: 4px;
  background: var(--gradient-main);
  border-radius: 4px;
  margin-bottom: 16px;
}
.mockup-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 100px;
  margin-bottom: 12px;
}
.chart-bar {
  flex: 1;
  background: rgba(0,102,255,0.2);
  border-radius: 4px 4px 0 0;
  transition: height 0.6s ease;
}
.chart-bar.active { background: linear-gradient(180deg, #00d4ff 0%, #0066ff 100%); }
.mockup-map {
  position: relative;
  height: 100px;
  background: rgba(0,102,255,0.05);
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}
.heatmap-dot {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,255,0.7) 0%, rgba(0,102,255,0.2) 50%, transparent 100%);
  transform: translate(-50%, -50%);
}
.mockup-donut {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}
.mockup-stats {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.mockup-stats span {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.mockup-stats span i { color: var(--accent); }
.mockup-stats b { color: #fff; }

/* ============================================================
   合作流程
   ============================================================ */
.process {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}
.process-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  justify-content: center;
}
.step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 12px;
  flex: 0 0 auto;
}
.step-num {
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}
.step-icon {
  width: 56px; height: 56px;
  background: rgba(0,102,255,0.1);
  border: 1px solid rgba(0,102,255,0.25);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  color: var(--primary-light);
  margin-bottom: 12px;
  transition: var(--transition);
}
.step-item:hover .step-icon { background: var(--gradient-main); border-color: transparent; color: #fff; transform: scale(1.1); }
.step-item h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 4px; }
.step-item p { font-size: 0.75rem; color: var(--text-secondary); max-width: 100px; }
.step-arrow { color: var(--text-muted); font-size: 0.8rem; padding: 0 4px; margin-bottom: 40px; flex-shrink: 0; }

/* ============================================================
   案例展示
   ============================================================ */
.cases {
  padding: 100px 0;
  background: var(--bg-dark);
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card); border-color: rgba(0,102,255,0.3); }
.case-img {
  height: 180px;
  position: relative;
  overflow: hidden;
}
.case-img-1 { background: linear-gradient(135deg, #0d2060 0%, #1a3a7c 50%, #0a2d5e 100%); }
.case-img-2 { background: linear-gradient(135deg, #0d3030 0%, #0a4040 50%, #083535 100%); }
.case-img-3 { background: linear-gradient(135deg, #2d0d60 0%, #3d1a7c 50%, #25085e 100%); }
.case-img-4 { background: linear-gradient(135deg, #3d1a0d 0%, #5c2d14 50%, #3a1208 100%); }
.case-img-5 { background: linear-gradient(135deg, #0d1a3d 0%, #1a2d5c 50%, #0a1430 100%); }
.case-img-6 { background: linear-gradient(135deg, #1a0d3d 0%, #2d1a5c 50%, #14083a 100%); }
/* Pattern overlay for case images */
.case-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -45deg,
    transparent, transparent 12px,
    rgba(0,102,255,0.05) 12px, rgba(0,102,255,0.05) 13px
  );
}
.case-overlay {
  position: absolute;
  top: 12px; left: 12px;
  z-index: 1;
}
.case-tag {
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.15);
  color: #fff;
  font-size: 0.72rem;
  padding: 4px 12px;
  border-radius: 50px;
}
.case-info { padding: 24px; }
.case-info h4 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.case-info p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.7; margin-bottom: 14px; }
.case-result {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ============================================================
   关于我们
   ============================================================ */
.about {
  padding: 100px 0;
  background: var(--bg-card);
}
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-text .section-tag { margin-bottom: 16px; display: inline-block; }
.about-text h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-weight: 700; margin-bottom: 20px; line-height: 1.3; }
.about-text p { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8; margin-bottom: 16px; }
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.about-tags span {
  background: rgba(0,102,255,0.1);
  border: 1px solid rgba(0,102,255,0.25);
  color: var(--primary-light);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.82rem;
}
.about-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 28px;
}
.about-mini-card {
  background: var(--bg-dark);
  border-radius: var(--radius-sm);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.about-mini-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.about-mini-card i { font-size: 1.4rem; }
.about-mini-card.blue i { color: var(--primary-light); }
.about-mini-card.cyan i { color: var(--accent); }
.about-mini-card.purple i { color: #a78bfa; }
.about-mini-card.orange i { color: #fb923c; }
.about-mini-card b { display: block; font-size: 1.3rem; font-weight: 800; }
.about-mini-card span { display: block; font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.about-timeline {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.timeline-item {
  display: flex;
  align-items: center;
  gap: 16px;
}
.year {
  flex-shrink: 0;
  width: 48px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
}
.event {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  padding-left: 16px;
  border-left: 2px solid rgba(0,102,255,0.3);
}

/* ============================================================
   合作伙伴
   ============================================================ */
.partners {
  padding: 80px 0;
  background: var(--bg-dark);
  overflow: hidden;
}
.partners-track-wrap {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.partners-track {
  display: flex;
  gap: 20px;
  animation: scroll-track 30s linear infinite;
  width: max-content;
}
.partner-logo {
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 32px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: var(--transition);
}
.partner-logo:hover { border-color: var(--primary); color: #fff; }
@keyframes scroll-track { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ============================================================
   联系我们
   ============================================================ */
.contact {
  padding: 100px 0;
  background: var(--bg-card);
}
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 48px;
  align-items: start;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.85rem; font-weight: 500; color: rgba(255,255,255,0.8); }
.req { color: #f87171; }
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-dark);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: #fff;
  padding: 12px 16px;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
  font-family: inherit;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); background: rgba(0,102,255,0.05); }
.form-group select option { background: #0d1b2e; }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-privacy { font-size: 0.78rem; color: var(--text-muted); text-align: center; display: flex; align-items: center; justify-content: center; gap: 6px; }
.contact-info-card {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.contact-info-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 24px; }
.info-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.info-item:last-of-type { border-bottom: none; }
.info-item i {
  font-size: 1rem;
  color: var(--accent);
  margin-top: 2px;
  flex-shrink: 0;
  width: 20px;
}
.info-item > div { display: flex; flex-direction: column; gap: 2px; }
.info-item span { font-size: 0.78rem; color: var(--text-secondary); }
.info-item b { font-size: 0.88rem; }
.qrcode-area { margin-top: 24px; display: flex; justify-content: center; }
.qrcode-box {
  width: 140px; height: 140px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
}
.qrcode-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}
.qrcode-placeholder i { font-size: 2.5rem; }
.qrcode-placeholder span { font-size: 0.75rem; }

/* ============================================================
   页脚
   ============================================================ */
.footer {
  background: #020810;
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.8; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.footer-col h5 { font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 10px; transition: var(--transition); }
.footer-col a:hover { color: var(--primary-light); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================================
   回到顶部 & Toast
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 44px; height: 44px;
  background: var(--gradient-main);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 0.9rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,102,255,0.4); }
.toast {
  position: fixed;
  bottom: 32px; left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: rgba(6,12,26,0.95);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(0,212,255,0.3);
  color: #fff;
  padding: 14px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 2000;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast i { color: #4ade80; }

/* ============================================================
   动画
   ============================================================ */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }

[data-aos] { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
[data-aos].aos-animated { opacity: 1; transform: translateY(0); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .about-inner { grid-template-columns: 1fr; gap: 48px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(6,12,26,0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 24px;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.1rem; }
  .hamburger { display: flex; z-index: 1000; position: relative; }
  .hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
  .hero-stats { flex-direction: column; gap: 16px; padding: 24px; }
  .stat-divider { width: 100%; height: 1px; }
  .stat-item { padding: 0; }
  .sol-content { grid-template-columns: 1fr; gap: 32px; padding: 28px; }
  .sol-visual { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .process-steps { gap: 8px; }
  .step-arrow { display: none; }
  .cases-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .section-header h2 { font-size: 1.6rem; }
  .about-card-grid { grid-template-columns: 1fr; }
  .contact-info-card { padding: 24px; }
}