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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: #e6ecff;
  background: #050816;
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

/* 背景光晕 */
.glow-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(600px 400px at 80% 10%, rgba(99, 102, 241, 0.25), transparent 60%),
    radial-gradient(500px 400px at 10% 80%, rgba(34, 211, 238, 0.18), transparent 60%),
    #050816;
}

/* 导航 */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 6%;
  background: rgba(5, 8, 22, 0.7);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(90deg, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo span {
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 3px;
  color: #6b7bb0;
}

.nav-links a {
  margin: 0 16px;
  font-size: 15px;
  color: #aab4d8;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.btn-cta {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 30px;
  background: linear-gradient(90deg, #6366f1, #22d3ee);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(99, 102, 241, 0.5);
}

/* 首屏 */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 70px 6%;
  min-height: 88vh;
}

.hero-content {
  max-width: 600px;
  z-index: 2;
}

.eyebrow {
  font-size: 14px;
  letter-spacing: 4px;
  color: #22d3ee;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: 58px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
}

.hero h1 span {
  background: linear-gradient(90deg, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.sub {
  font-size: 16px;
  color: #aab4d8;
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 34px;
  flex-wrap: wrap;
}

.btn-ghost {
  display: inline-block;
  padding: 11px 26px;
  border-radius: 30px;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  color: #e6ecff;
  font-size: 14px;
  transition: all 0.25s;
}

.btn-ghost:hover {
  border-color: #22d3ee;
  color: #22d3ee;
}

.hero-badges {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.hero-badges span {
  font-size: 13px;
  color: #8d99c4;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 6px 14px;
  border-radius: 20px;
}

/* 光球 */
.hero-orb {
  position: relative;
  width: 420px;
  height: 420px;
  z-index: 1;
}

.ring {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(129, 140, 248, 0.4);
}

.ring-1 {
  width: 400px;
  height: 400px;
  animation: spin 14s linear infinite;
}

.ring-2 {
  width: 300px;
  height: 300px;
  border-color: rgba(34, 211, 238, 0.4);
  animation: spin 10s linear infinite reverse;
}

.ring-3 {
  width: 200px;
  height: 200px;
  border-style: dashed;
  animation: spin 6s linear infinite;
}

.core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #22d3ee, #6366f1);
  box-shadow: 0 0 80px rgba(99, 102, 241, 0.9);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 60px rgba(99, 102, 241, 0.7); }
  50% { box-shadow: 0 0 110px rgba(34, 211, 238, 0.9); }
}

/* 通用 section */
.section {
  padding: 100px 6%;
}

.section.alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.section-head h2 {
  font-size: 34px;
  font-weight: 700;
}

/* 产品卡片 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  padding: 36px 28px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.3s, border 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
}

.card-icon {
  font-size: 40px;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.card p {
  font-size: 14px;
  color: #aab4d8;
  margin-bottom: 18px;
}

.link {
  font-size: 14px;
  color: #22d3ee;
}

.link:hover {
  color: #818cf8;
}

/* 技术优势 */
.feature-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.feature-item {
  display: flex;
  gap: 26px;
  padding: 24px 28px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-num {
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(90deg, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  flex-shrink: 0;
}

.feature-item h3 {
  font-size: 19px;
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 14px;
  color: #aab4d8;
}

/* 数据 */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat {
  text-align: center;
  padding: 34px 10px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat strong {
  display: block;
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(90deg, #818cf8, #22d3ee);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat span {
  font-size: 14px;
  color: #aab4d8;
}

/* CTA */
.cta-box {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
  padding: 60px 30px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(34, 211, 238, 0.12));
  border: 1px solid rgba(129, 140, 248, 0.3);
}

.cta-box h2 {
  font-size: 32px;
  margin-bottom: 14px;
}

.cta-box p {
  color: #aab4d8;
  margin-bottom: 28px;
}

.footer {
  text-align: center;
  padding: 30px;
  font-size: 13px;
  color: #6b7bb0;
}

/* 响应式 */
@media (max-width: 900px) {
  .hero { flex-direction: column; text-align: center; padding-top: 40px; }
  .hero-actions, .hero-badges { justify-content: center; }
  .hero-orb { width: 300px; height: 300px; margin-top: 30px; }
  .ring-1 { width: 300px; height: 300px; }
  .ring-2 { width: 220px; height: 220px; }
  .ring-3 { width: 150px; height: 150px; }
  .grid-3 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 40px; }
  .stats { grid-template-columns: 1fr; }
}