/* ===== Gate 官网 - 全局样式 ===== */
:root {
  --bg-primary: #0b1120;
  --bg-secondary: #111827;
  --bg-card: #1a2332;
  --brand-blue: #17c3b2;
  --brand-gradient: linear-gradient(135deg, #1a2980 0%, #26d0ce 100%);
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #6b7280;
  --border-color: #2d3748;
  --accent-glow: rgba(23, 195, 178, 0.4);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(23, 195, 178, 0.15);
  transition: var(--transition);
  padding: 0 24px;
}

.navbar.scrolled {
  box-shadow: 0 4px 30px rgba(23, 195, 178, 0.15);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 1px;
}

.nav-brand .brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #fff;
  font-weight: 900;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 8px;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand-blue);
  background: rgba(23, 195, 178, 0.08);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--brand-blue);
  border-radius: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 26px;
  height: 2.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero 区域 ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse at 50% 0%, rgba(23, 195, 178, 0.12) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(26, 41, 128, 0.3) 0%, transparent 50%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5L55 50H5z' fill='none' stroke='rgba(23,195,178,0.04)' stroke-width='1'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  max-width: 1280px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(135deg, #ffffff 0%, #26d0ce 50%, #17c3b2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
}

.hero-text .hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin: 32px 0;
  flex-wrap: wrap;
}

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

.hero-stat .stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--brand-blue);
  display: block;
}

.hero-stat .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image img {
  max-width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: 0 0 80px rgba(23, 195, 178, 0.2);
}

/* ===== 按钮样式 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(23, 195, 178, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(23, 195, 178, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--brand-blue);
  border: 2px solid var(--brand-blue);
}

.btn-outline:hover {
  background: rgba(23, 195, 178, 0.1);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.1rem;
}

/* ===== 通用 Section ===== */
.section {
  padding: 100px 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #ffffff, #26d0ce);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

/* ===== Features 区域 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.feature-card:hover {
  border-color: var(--brand-blue);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(23, 195, 178, 0.12);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: rgba(23, 195, 178, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== CTA 区域 ===== */
.cta-section {
  background: radial-gradient(ellipse at 50% 50%, rgba(23, 195, 178, 0.15) 0%, transparent 60%);
  text-align: center;
  padding: 100px 24px;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 20px;
}

.cta-section p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 36px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 性能数据区 ===== */
.performance-section {
  padding: 80px 24px;
  background: var(--bg-secondary);
}

.performance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  text-align: center;
}

.perf-card {
  padding: 40px 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.perf-card:hover {
  border-color: var(--brand-blue);
  box-shadow: 0 0 30px rgba(23, 195, 178, 0.1);
}

.perf-card .perf-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.perf-card .perf-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-top: 8px;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 60px 24px 30px;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
}

.footer-col h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--brand-blue);
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ===== 时间线（关于我们） ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--brand-blue), transparent);
}

.timeline-item {
  display: flex;
  justify-content: flex-end;
  padding: 24px 0;
  position: relative;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  align-self: flex-end;
  justify-content: flex-start;
  margin-left: auto;
}

.timeline-item:nth-child(even) {
  align-self: flex-start;
  justify-content: flex-end;
}

.timeline-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  width: 85%;
  position: relative;
}

.timeline-item::after {
  content: '';
  position: absolute;
  top: 32px;
  width: 14px;
  height: 14px;
  background: var(--brand-blue);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-item:nth-child(odd)::after {
  left: -7px;
}

.timeline-item:nth-child(even)::after {
  right: -7px;
}

.timeline-year {
  font-size: 0.85rem;
  color: var(--brand-blue);
  font-weight: 700;
  margin-bottom: 6px;
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ===== 服务/产品卡片 ===== */
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-card:hover {
  border-color: var(--brand-blue);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(23, 195, 178, 0.12);
}

.service-card .service-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: rgba(23, 195, 178, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  padding: 6px 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-features li::before {
  content: '✓';
  color: var(--brand-blue);
  font-weight: 700;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--brand-blue);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
  color: var(--text-primary);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--brand-blue);
  font-weight: 300;
  transition: var(--transition);
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ===== 联系表单 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.contact-info > p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.contact-detail .contact-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(23, 195, 178, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-detail h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-detail p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(23, 195, 178, 0.1);
}

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

/* ===== 面包屑 ===== */
.breadcrumb {
  max-width: 1280px;
  margin: 0 auto 8px;
  padding: 100px 24px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--brand-blue);
}

.breadcrumb span {
  margin: 0 6px;
}

/* ===== 页面标题区 ===== */
.page-hero {
  padding: 40px 24px 80px;
  text-align: center;
  position: relative;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, #ffffff, #26d0ce);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes countUp {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(23, 195, 178, 0.2); }
  50% { box-shadow: 0 0 40px rgba(23, 195, 178, 0.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-image {
    order: -1;
  }

  .hero-image img {
    max-width: 70%;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: calc(100% - 40px);
    margin-left: 40px;
    justify-content: flex-start;
  }

  .timeline-item::after,
  .timeline-item:nth-child(odd)::after,
  .timeline-item:nth-child(even)::after {
    left: -27px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(11, 17, 32, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    border-bottom: 1px solid var(--border-color);
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .nav-toggle {
    display: flex;
  }

  .section {
    padding: 60px 16px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 100px 16px 50px;
  }

  .performance-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-form {
    padding: 24px;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    gap: 16px;
  }

  .hero-stat .stat-number {
    font-size: 1.6rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.9rem;
  }

  .performance-grid {
    grid-template-columns: 1fr;
  }
}