:root {
  --bg: #070b14;
  --bg-soft: #0c1322;
  --card: rgba(255, 255, 255, 0.04);
  --line: rgba(120, 170, 220, 0.16);
  --text: #e8eef8;
  --muted: #93a3bd;
  --accent: #4cc9f0;
  --accent-2: #7c8cf8;
  --radius: 14px;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

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

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 背景光晕 ---------- */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(76, 201, 240, 0.16), transparent 70%),
    radial-gradient(800px 480px at 92% 4%, rgba(124, 140, 248, 0.16), transparent 70%),
    radial-gradient(700px 500px at 50% 108%, rgba(76, 201, 240, 0.08), transparent 70%);
  pointer-events: none;
}

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(7, 11, 20, 0.72);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 700;
  color: #04121b;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover { color: var(--text); }

.nav-cta { margin-left: 4px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  cursor: pointer;
}

.btn-primary {
  color: #04121b;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 10px 30px rgba(76, 201, 240, 0.22);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(76, 201, 240, 0.3);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.btn-ghost:hover {
  border-color: rgba(120, 170, 220, 0.4);
  background: rgba(255, 255, 255, 0.07);
}

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid rgba(76, 201, 240, 0.35);
  background: rgba(76, 201, 240, 0.08);
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(32px, 5.2vw, 56px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  background: linear-gradient(120deg, #ffffff 20%, #9fd9ef 60%, #b6bdfb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 680px;
  margin: 22px auto 0;
  font-size: 16.5px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 760px;
  margin: 56px auto 0;
  padding: 0;
  list-style: none;
}

.hero-metrics li {
  padding: 18px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.hero-metrics strong {
  display: block;
  font-size: 18px;
  color: var(--text);
}

.hero-metrics span {
  font-size: 13.5px;
  color: var(--muted);
}

/* ---------- 通用 section ---------- */
.section { padding: 84px 0; }

.section-alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(12, 19, 34, 0.55);
}

.section-kicker {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-title {
  margin: 0 0 34px;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.35;
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 201, 240, 0.35);
  background: rgba(76, 201, 240, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.card p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

/* ---------- 部署步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.step-no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 8px;
}

.steps h3 { margin: 0 0 8px; font-size: 17px; }

.steps p { margin: 0; font-size: 14.5px; color: var(--muted); }

/* ---------- 关于 ---------- */
.about {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
  align-items: start;
}

.about p { color: var(--muted); font-size: 15.5px; }

.about-panel {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.about-panel-title {
  margin: 0 0 14px !important;
  font-size: 14px;
  color: var(--text) !important;
  letter-spacing: 0.06em;
}

.progress {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14.5px;
}

.progress li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(120, 170, 220, 0.14);
}

.progress li:last-child { border-bottom: 0; }

.progress span { color: var(--muted); }

.progress em {
  font-style: normal;
  font-size: 13px;
}

.progress .done { color: #6ee7b7; }
.progress .doing { color: #fbbf6e; }

/* ---------- 联系 ---------- */
.contact { text-align: center; }

.contact-hint { color: var(--muted); margin: -18px 0 30px; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  text-align: left;
}

.contact-item {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.contact-label {
  display: block;
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 8px;
}

.contact-item a,
.contact-item p {
  margin: 0;
  font-size: 15px;
  color: var(--text);
  word-break: break-word;
}

.contact-item a:hover { color: var(--accent); }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 44px;
  background: rgba(7, 11, 20, 0.9);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.footer-meta {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 2;
}

.footer-meta a { color: var(--text); }

.footer-meta a:hover { color: var(--accent); }

.copyright {
  margin: 6px 0 0;
  font-size: 13px;
  color: rgba(147, 163, 189, 0.85);
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .about { grid-template-columns: 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .nav-cta { margin-left: auto; }
}

@media (max-width: 620px) {
  .grid, .steps, .hero-metrics { grid-template-columns: 1fr; }
  .hero { padding: 68px 0 48px; }
  .section { padding: 64px 0; }
  .header-inner { height: 60px; }
}