/* =========================================================
   HX 云计算 · 五零慧星集团 — 高端展示官网
   深空科技风 · 玻璃拟态 · 渐变光效
   ========================================================= */

:root {
  --bg: #05070f;
  --bg-soft: #0a0e1d;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.09);
  --text: #e8ecf8;
  --text-dim: #9aa4c0;
  --primary: #5b8cff;
  --primary-2: #8f6bff;
  --accent: #37e6c8;
  --grad: linear-gradient(135deg, #5b8cff 0%, #8f6bff 50%, #37e6c8 100%);
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --nav-h: 72px;
}

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

html { scroll-behavior: smooth; }

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

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

.container {
  width: min(1180px, 92%);
  margin: 0 auto;
}

/* ---------- 粒子背景 ---------- */
#particle-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  transition: all .3s ease;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-glow {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 30px rgba(91, 140, 255, 0.35);
}
.btn-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(143, 107, 255, 0.5);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-3px);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: all .35s ease;
  background: rgba(5, 7, 15, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 7, 15, 0.85);
  border-bottom-color: rgba(255, 255, 255, 0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: var(--grad);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1px;
  box-shadow: 0 6px 20px rgba(91, 140, 255, 0.4);
}
.brand-text {
  display: flex; flex-direction: column;
  font-weight: 700; font-size: 17px; line-height: 1.2;
}
.brand-text small { font-size: 11px; font-weight: 400; color: var(--text-dim); letter-spacing: 2px; }

.nav-links { display: flex; gap: 34px; }
.nav-links a {
  position: relative;
  font-size: 15px;
  color: var(--text-dim);
  transition: color .3s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--grad);
  border-radius: 2px;
  transition: width .3s;
}
.nav-links a:hover { color: #fff; }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all .3s;
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 80px;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(91, 140, 255, 0.16), transparent 60%),
    radial-gradient(ellipse 55% 45% at 80% 75%, rgba(143, 107, 255, 0.14), transparent 60%),
    radial-gradient(ellipse 40% 35% at 70% 15%, rgba(55, 230, 200, 0.08), transparent 55%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}
.hero-tag {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--accent);
  background: rgba(55, 230, 200, 0.08);
  border: 1px solid rgba(55, 230, 200, 0.25);
  margin-bottom: 26px;
}
.hero-title {
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 1px;
  margin-bottom: 26px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-sub {
  font-size: clamp(15px, 2vw, 19px);
  color: var(--text-dim);
  margin-bottom: 38px;
  letter-spacing: 0.5px;
}
.hero-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 70px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 860px;
  margin: 0 auto;
}
.stat {
  padding: 22px 14px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(8px);
}
.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-unit { font-size: 18px; font-weight: 700; color: var(--primary-2); margin-left: 2px; }
.stat p { margin-top: 6px; font-size: 13px; color: var(--text-dim); }

.hero-wave {
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 140px;
  background:
    linear-gradient(160deg, transparent 30%, var(--bg-soft) 30.5%),
    linear-gradient(200deg, transparent 60%, var(--bg) 60.5%);
  opacity: 0.9;
}

/* ---------- 通用区块 ---------- */
.section { padding: 110px 0; position: relative; }
.section-head { text-align: center; margin-bottom: 64px; }
.section-eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 600;
}
.section-title {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  margin-bottom: 14px;
}
.section-desc { color: var(--text-dim); font-size: 16px; }

.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 产品卡片 ---------- */
.card {
  position: relative;
  padding: 34px 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(10px);
  transition: all .4s ease;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad);
  opacity: 0;
  transition: opacity .4s;
  z-index: -1;
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(91, 140, 255, 0.45);
  box-shadow: var(--shadow);
  background: rgba(255, 255, 255, 0.06);
}
.card-featured { border-color: rgba(143, 107, 255, 0.4); }
.card-badge {
  position: absolute;
  top: 16px; right: 16px;
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  color: #fff;
  background: var(--grad);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(143, 107, 255, 0.5); }
  50% { box-shadow: 0 0 0 8px rgba(143, 107, 255, 0); }
}
.card-icon { font-size: 42px; margin-bottom: 18px; }
.card h3 { font-size: 21px; margin-bottom: 12px; }
.card p { color: var(--text-dim); font-size: 15px; margin-bottom: 20px; }
.card p strong { color: var(--accent); }
.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: color .3s;
}
.card-link:hover { color: var(--accent); }

/* ---------- AI 服务 ---------- */
.ai-section {
  background:
    radial-gradient(ellipse 50% 60% at 50% 0%, rgba(143, 107, 255, 0.12), transparent 65%);
}
.ai-item {
  text-align: center;
  padding: 30px 16px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  transition: all .4s;
}
.ai-item:hover { transform: translateY(-6px); border-color: rgba(143, 107, 255, 0.5); }
.ai-logo {
  width: 74px; height: 74px;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
  background: linear-gradient(135deg, #10a37f, #1a7f64);
  box-shadow: 0 10px 30px rgba(16, 163, 127, 0.35);
}
.ai-claude { background: linear-gradient(135deg, #d97757, #b25c3d); box-shadow: 0 10px 30px rgba(217, 119, 87, 0.35); }
.ai-grok  { background: linear-gradient(135deg, #2b2f36, #1a1c22); border: 1px solid rgba(255,255,255,0.15); box-shadow: 0 10px 30px rgba(0,0,0,0.4); }
.ai-gemini { background: linear-gradient(135deg, #4285f4, #ea4335); box-shadow: 0 10px 30px rgba(66, 133, 244, 0.35); }
.ai-item p { color: var(--text-dim); font-size: 14px; }

.ai-cta {
  margin-top: 56px;
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
}
.ai-cta p { font-size: 17px; color: var(--text); }
.ai-cta p strong { color: var(--accent); }

/* ---------- 核心优势 ---------- */
.feature {
  padding: 30px 24px;
  border-left: 2px solid rgba(91, 140, 255, 0.35);
  background: linear-gradient(90deg, rgba(91, 140, 255, 0.06), transparent);
  transition: all .4s;
}
.feature:hover { border-left-color: var(--accent); transform: translateX(6px); }
.feature-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 14px;
}
.feature h3 { font-size: 19px; margin-bottom: 10px; }
.feature p { color: var(--text-dim); font-size: 14px; }

/* ---------- 联系 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.contact-card {
  text-align: center;
  padding: 34px 20px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--card-border);
  transition: all .4s;
}
.contact-card:hover {
  transform: translateY(-6px);
  border-color: rgba(55, 230, 200, 0.5);
  box-shadow: var(--shadow);
}
.contact-icon { font-size: 36px; display: block; margin-bottom: 14px; }
.contact-card h3 { font-size: 17px; margin-bottom: 6px; }
.contact-card p { color: var(--primary); font-size: 15px; font-weight: 600; }

/* ---------- 页脚 ---------- */
.footer {
  padding: 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: var(--bg-soft);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-dim);
}
.footer-links a { color: var(--text-dim); transition: color .3s; }
.footer-links a:hover { color: var(--accent); }
.footer-links span { margin: 0 8px; opacity: .4; }

/* ---------- 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity .8s cubic-bezier(.2, .7, .3, 1), transform .8s cubic-bezier(.2, .7, .3, 1);
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    right: 0;
    flex-direction: column;
    background: rgba(5, 7, 15, 0.97);
    padding: 24px 32px;
    gap: 22px;
    transform: translateX(100%);
    transition: transform .35s ease;
    border-bottom-left-radius: 18px;
    border-left: 1px solid var(--card-border);
    border-bottom: 1px solid var(--card-border);
    min-width: 220px;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .ai-cta { flex-direction: column; text-align: center; }
}