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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: #2d3748;
  background: #fff;
  overflow-x: hidden;
}

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

a { color: #2b6cb0; text-decoration: none; transition: color .25s; }
a:hover { color: #1a4f8a; }

ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; }

h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: #1a202c; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 通用组件 ===== */
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, #ebf4ff, #f0fff4);
  color: #2b6cb0;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  margin-bottom: 16px;
  color: #1a202c;
}

.section-desc {
  font-size: 1.05rem;
  color: #718096;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.text-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all .3s cubic-bezier(.4,0,.2,1);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: 10px; }
.btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
  box-shadow: 0 4px 15px rgba(102,126,234,.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102,126,234,.5);
  color: #fff;
}
.btn-outline {
  border-color: #667eea;
  color: #667eea;
  background: transparent;
}
.btn-outline:hover {
  background: #667eea;
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 顶部信息条 ===== */
.top-bar {
  background: #1a202c;
  color: #a0aec0;
  font-size: 0.82rem;
  padding: 8px 0;
  position: relative;
  z-index: 100;
}
.top-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.top-bar a {
  color: #a0aec0;
  margin-left: 20px;
  transition: color .2s;
}
.top-bar a:hover { color: #fff; }

/* ===== 导航栏 ===== */
.header {
  position: fixed;
  top: 36px;
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(0,0,0,.06);
  transition: all .3s;
}
.header.scrolled { top: 0; box-shadow: 0 4px 30px rgba(0,0,0,.1); }
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}
.logo-text {
  font-size: 1.3rem;
  font-weight: 800;
  color: #1a202c;
}
.logo-text span {
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.main-nav ul {
  display: flex;
  gap: 8px;
}
.main-nav a {
  display: block;
  padding: 8px 16px;
  color: #4a5568;
  font-weight: 500;
  border-radius: 6px;
  transition: all .25s;
}
.main-nav a:hover,
.main-nav a.active {
  color: #667eea;
  background: #ebf4ff;
}
.btn-call {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all .3s;
  text-decoration: none;
}
.btn-call:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(102,126,234,.4); }

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: #1a202c;
  border-radius: 2px;
  transition: all .3s;
}

/* ===== Hero区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 60px;
  overflow: hidden;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(102,126,234,.15) 0%, transparent 70%),
              radial-gradient(ellipse at 70% 30%, rgba(118,75,162,.12) 0%, transparent 60%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }
.hero-content { max-width: 800px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 30px;
  color: #e2e8f0;
  font-size: 0.9rem;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}
.pulse-dot {
  width: 8px;
  height: 8px;
  background: #48bb78;
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.8rem);
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.2;
  font-weight: 800;
}
.hero-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: #cbd5e1;
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}
.hero-actions .btn-primary {
  background: linear-gradient(135deg, #667eea, #764ba2);
}
.hero-actions .btn-outline {
  border-color: rgba(255,255,255,.3);
  color: #fff;
}
.hero-actions .btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
}

/* Hero数据 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 32px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 16px;
  backdrop-filter: blur(10px);
}
.stat-item {
  text-align: center;
  color: #fff;
}
.stat-number {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1;
  display: inline-block;
}
.stat-suffix {
  font-size: 1.2rem;
  font-weight: 700;
  display: inline-block;
  margin-left: 2px;
  color: #a0aec0;
}
.stat-label {
  font-size: 0.85rem;
  color: #a0aec0;
  margin-top: 6px;
}

/* 滚动提示 */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.mouse {
  width: 28px;
  height: 44px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 14px;
  position: relative;
}
.wheel {
  width: 4px;
  height: 8px;
  background: #fff;
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 1.5s infinite;
}
@keyframes scrollWheel {
  0% { top: 8px; opacity: 1; }
  100% { top: 24px; opacity: 0; }
}

/* ===== 服务区域 ===== */
.services {
  padding: 100px 0;
  background: #f8fafc;
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: #fff;
  padding: 40px 32px;
  border-radius: 16px;
  box-shadow: 0 2px 20px rgba(0,0,0,.04);
  transition: all .35s cubic-bezier(.4,0,.2,1);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s;
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(0,0,0,.1);
}
.service-card:hover::before { transform: scaleX(1); }
.service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ebf4ff, #f3e8ff);
  border-radius: 14px;
  font-size: 1.8rem;
  margin-bottom: 20px;
}
.service-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}
.service-card p {
  color: #718096;
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.service-link {
  color: #667eea;
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .25s;
}
.service-link:hover { gap: 8px; }

/* ===== 关于我们 ===== */
.about-section {
  padding: 100px 0;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-image {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.12);
}
.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}
.about-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: rgba(255,255,255,.95);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,.1);
}
.badge-icon { font-size: 1.5rem; }
.about-badge strong { display: block; font-size: 0.95rem; }
.about-badge small { color: #718096; font-size: 0.8rem; }

.about-features {
  margin: 28px 0;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}
.feature-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #48bb78;
  color: #fff;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  margin-top: 2px;
}
.feature-item h4 { font-size: 1rem; margin-bottom: 2px; }
.feature-item p { color: #718096; font-size: 0.88rem; }

/* ===== 科技区域 ===== */
.tech-section {
  padding: 100px 0;
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
}
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.tech-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.1);
}
.tech-image img { width: 100%; }
.tech-list { margin-top: 32px; }
.tech-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid #e2e8f0;
}
.tech-item:last-child { border: none; }
.tech-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  min-width: 100px;
}
.tech-item h4 { font-size: 1.05rem; }
.tech-item p { color: #718096; font-size: 0.9rem; }

/* ===== 团队区域 ===== */
.team-section {
  padding: 100px 0;
}
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.team-card {
  text-align: center;
  padding: 40px 28px;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 4px 25px rgba(0,0,0,.05);
  transition: all .35s;
}
.team-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 15px 40px rgba(0,0,0,.1);
}
.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  box-shadow: 0 8px 25px rgba(0,0,0,.15);
}
.team-card h3 { font-size: 1.2rem; margin-bottom: 4px; }
.team-role {
  color: #667eea;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.team-desc {
  color: #718096;
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 16px;
}
.team-social {
  display: flex;
  justify-content: center;
  gap: 10px;
}
.team-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f7fafc;
  border-radius: 50%;
  color: #4a5568;
  font-size: 0.8rem;
  font-weight: 700;
  transition: all .25s;
}
.team-social a:hover {
  background: #667eea;
  color: #fff;
}
.team-cta { text-align: center; margin-top: 40px; }

/* ===== VIP区域 ===== */
.vip-section {
  padding: 100px 0;
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  color: #fff;
}
.vip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.vip-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.vip-image img { width: 100%; height: 420px; object-fit: cover; }
.vip-section .section-title { color: #fff; }
.vip-section .section-tag {
  background: rgba(255,255,255,.1);
  color: #e2e8f0;
}
.vip-features {
  margin: 28px 0;
}
.vip-features li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #cbd5e1;
  font-size: 1rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.vip-features li:last-child { border: none; }
.vip-features span { color: #f6e05e; font-size: 1.1rem; }
.vip-section .btn-primary {
  background: linear-gradient(135deg, #f6e05e, #f6ad55);
  color: #1a202c;
  box-shadow: 0 4px 15px rgba(246,224,94,.3);
}

/* ===== 数据仪表盘 ===== */
.dashboard-section {
  padding: 100px 0;
  background: #f8fafc;
}
.dashboard-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.1);
  max-width: 1000px;
  margin: 0 auto;
}
.dashboard-image img { width: 100%; }

/* ===== 联系区域 ===== */
.contact-section {
  padding: 100px 0;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.contact-card {
  text-align: center;
  padding: 40px 28px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 4px 25px rgba(0,0,0,.05);
  transition: all .3s;
}
.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(0,0,0,.08);
}
.contact-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ebf4ff, #f3e8ff);
  border-radius: 14px;
  font-size: 1.6rem;
  margin: 0 auto 16px;
}
.contact-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
.contact-info { color: #718096; font-size: 0.9rem; margin-bottom: 8px; }
.contact-link {
  color: #667eea;
  font-weight: 700;
  font-size: 1.1rem;
}
.contact-cta { text-align: center; margin-top: 40px; }

/* ===== FAQ ===== */
.faq-section {
  padding: 100px 0;
  background: #f8fafc;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,.03);
  transition: box-shadow .25s;
}
.faq-item[open] { box-shadow: 0 8px 30px rgba(0,0,0,.08); }
.faq-item summary {
  padding: 20px 28px;
  font-weight: 600;
  font-size: 1.02rem;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 50px;
  transition: color .2s;
}
.faq-item summary:hover { color: #667eea; }
.faq-item summary::after {
  content: '+';
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  color: #667eea;
  font-weight: 300;
  transition: transform .3s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-answer {
  padding: 0 28px 20px;
  color: #718096;
  line-height: 1.8;
}
.faq-more { text-align: center; margin-top: 32px; }

/* ===== CTA区域 ===== */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
}
.cta-section h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin-bottom: 12px;
  color: #fff;
}
.cta-section p {
  font-size: 1.05rem;
  opacity: .9;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-section .btn-outline {
  border-color: rgba(255,255,255,.5);
  color: #fff;
}
.cta-section .btn-outline:hover {
  background: rgba(255,255,255,.15);
  border-color: #fff;
}

/* ===== 页脚 ===== */
.footer {
  position: relative;
  background: #0f172a;
  color: #94a3b8;
  padding: 80px 0 30px;
  overflow: hidden;
}
.footer-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.08;
  z-index: 0;
}
.footer .container { position: relative; z-index: 1; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 50px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  text-decoration: none;
}
.footer-logo img { border-radius: 8px; }
.footer-logo span {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
}
.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 380px;
}
.footer-badge {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-badge img { border-radius: 8px; opacity: .8; }
.footer-badge span {
  font-size: 0.82rem;
  color: #cbd5e1;
  line-height: 1.4;
}
.footer h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 16px;
}
.footer-links ul li { margin-bottom: 10px; }
.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color .2s;
}
.footer-links a:hover { color: #667eea; }
.footer-contact-list li {
  margin-bottom: 10px;
  font-size: 0.9rem;
}
.footer-social {
  display: flex;
  gap: 10px;
  margin-top: 16px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.08);
  border-radius: 50%;
  color: #94a3b8;
  font-size: 0.75rem;
  font-weight: 700;
  transition: all .25s;
}
.footer-social a:hover {
  background: #667eea;
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  line-height: 2;
}
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #667eea; }

/* ===== 悬浮按钮 ===== */
.floating-actions {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 98;
}
.float-btn {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 1.3rem;
  box-shadow: 0 4px 15px rgba(0,0,0,.15);
  transition: all .3s;
  text-decoration: none;
}
.float-call {
  background: linear-gradient(135deg, #48bb78, #38a169);
  color: #fff;
}
.float-chat {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
}
.float-top {
  background: #1a202c;
  color: #fff;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
}
.float-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.float-btn:hover { transform: scale(1.1); }

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-up { animation: fadeInUp .6s ease forwards; }

/* AOS替代 - 简单滚动动画 */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}
[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}
[data-aos-delay="100"] { transition-delay: .1s; }
[data-aos-delay="200"] { transition-delay: .2s; }
[data-aos-delay="300"] { transition-delay: .3s; }
[data-aos-delay="400"] { transition-delay: .4s; }
[data-aos-delay="500"] { transition-delay: .5s; }