/* ============================================================
   MetaOps 元宇宙运维 — 全局样式
   深色科技风 / 响应式 / 无框架依赖
   ============================================================ */

:root {
  --bg: #0a0e1a;
  --bg-2: #0e1424;
  --bg-3: #131b31;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf5;
  --muted: #9aa6bd;
  --accent: #3ee6c4;
  --accent-2: #5b8cff;
  --accent-grad: linear-gradient(120deg, #3ee6c4 0%, #5b8cff 100%);
  --danger: #ff6b6b;
  --radius: 16px;
  --radius-sm: 10px;
  --max-w: 1180px;
  --nav-h: 72px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --shadow: 0 20px 50px rgba(3, 8, 20, 0.45);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul { list-style: none; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

section { padding: 96px 0; }

/* ---------- 通用文字 ---------- */

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  font-weight: 600;
}

.section-title {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.section-sub {
  color: var(--muted);
  max-width: 640px;
  margin-top: 14px;
  font-size: 17px;
}

.grad-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.center { text-align: center; }
.center .section-sub { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-grad);
  color: #06121c;
  box-shadow: 0 8px 24px rgba(62, 230, 196, 0.25);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(91, 140, 255, 0.35); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 导航 ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06);
}

.nav-wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand img { height: 36px; width: auto; }

.nav-menu { display: flex; align-items: center; gap: 6px; }

.nav-menu a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--muted);
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-menu a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }

.nav-menu a.active { color: var(--accent); font-weight: 600; }

.nav-cta { margin-left: 8px; padding: 9px 20px; font-size: 14px; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  position: relative;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  margin: 5px auto;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 64px) 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: var(--bg);
}

.hero-bg canvas {
  position: absolute;
  inset: 0;
  display: block;
}

/* WebGL 不可用时的静态兜底背景 */
.hero-bg.no-webgl {
  background:
    radial-gradient(ellipse 62% 52% at 68% 42%, rgba(62, 230, 196, 0.1), transparent 62%),
    radial-gradient(ellipse 42% 36% at 68% 42%, rgba(4, 7, 13, 0.95), transparent 60%),
    var(--bg);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg,
      rgba(10, 14, 26, 0.45) 0%,
      rgba(10, 14, 26, 0.6) 55%,
      var(--bg) 100%);
  pointer-events: none;
}

.hero-inner { max-width: 780px; position: relative; z-index: 1; }

.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.hero-en {
  margin-top: 18px;
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--muted);
  letter-spacing: 0.06em;
  font-weight: 500;
}

.hero-desc {
  margin-top: 22px;
  font-size: 17px;
  color: #c3cbdc;
  max-width: 620px;
}

.hero-actions { margin-top: 38px; display: flex; gap: 16px; flex-wrap: wrap; }

.hero-tags { margin-top: 46px; display: flex; gap: 10px; flex-wrap: wrap; }

.hero-tags li {
  font-size: 13px;
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 5px 14px;
}

/* ---------- 特性条 ---------- */

.facts { padding: 0; margin-top: -40px; position: relative; z-index: 2; }

.facts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.fact {
  background: var(--bg-2);
  padding: 30px 28px;
  text-align: center;
}

.fact b {
  display: block;
  font-size: 26px;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 800;
}

.fact span { color: var(--muted); font-size: 14px; }

/* ---------- 服务卡片 ---------- */

.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.svc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
  overflow: hidden;
}

.svc-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--accent-grad);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.svc-card:hover {
  transform: translateY(-6px);
  border-color: rgba(62, 230, 196, 0.4);
  background: rgba(255, 255, 255, 0.06);
}

.svc-card:hover::before { opacity: 1; }

.svc-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(62, 230, 196, 0.1);
  margin-bottom: 22px;
  color: var(--accent);
}

.svc-icon svg { width: 28px; height: 28px; }

.svc-card h3 { font-size: 21px; margin-bottom: 10px; }

.svc-card > p { color: var(--muted); font-size: 15px; flex: 1; }

.svc-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 22px; }

.svc-tags li {
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.12);
  color: #aebfee;
}

.svc-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.svc-link svg { transition: transform 0.2s ease; }
.svc-card:hover .svc-link svg { transform: translateX(4px); }

/* ---------- 关于（首页） ---------- */

.about-split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-media { position: relative; }

.about-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.about-media::after {
  content: "";
  position: absolute;
  inset: 14px -14px -14px 14px;
  border: 1px solid rgba(62, 230, 196, 0.3);
  border-radius: var(--radius);
  z-index: -1;
}

.about-list { margin-top: 28px; display: grid; gap: 16px; }

.about-list li { display: flex; gap: 14px; align-items: flex-start; }

.about-list .dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-top: 9px;
  background: var(--accent-grad);
  box-shadow: 0 0 12px rgba(62, 230, 196, 0.7);
}

.about-list b { display: block; font-size: 16px; }
.about-list p { color: var(--muted); font-size: 14.5px; margin-top: 2px; }

/* ---------- 合作伙伴 ---------- */

.partners { background: var(--bg-2); }

.partner-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.partner-card {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 18px 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.partner-card img { max-height: 86px; object-fit: contain; }

.partner-card:hover { transform: translateY(-4px); box-shadow: 0 14px 30px rgba(3, 8, 20, 0.5); }

/* ---------- CTA 横幅 ---------- */

.cta-banner {
  position: relative;
  border-radius: var(--radius);
  padding: 64px 48px;
  text-align: center;
  background:
    radial-gradient(600px 200px at 20% 0%, rgba(62, 230, 196, 0.18), transparent 60%),
    radial-gradient(600px 240px at 90% 100%, rgba(91, 140, 255, 0.2), transparent 60%),
    var(--bg-3);
  border: 1px solid rgba(255, 255, 255, 0.09);
  overflow: hidden;
}

.cta-banner h2 { font-size: clamp(24px, 3vw, 34px); }
.cta-banner p { color: var(--muted); margin: 14px auto 30px; max-width: 520px; }

/* ---------- 页脚 ---------- */

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: #070a13;
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand img { height: 30px; margin-bottom: 16px; }

.footer-brand p { color: var(--muted); font-size: 14px; max-width: 280px; }

.footer-col h4 {
  font-size: 15px;
  margin-bottom: 18px;
  color: var(--text);
  letter-spacing: 0.04em;
}

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

.footer-col a, .footer-col p {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  margin-top: 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: #6b7690;
  font-size: 13px;
}

.footer-bottom a { color: #6b7690; }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 子页面通用 ---------- */

.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 84px) 0 72px;
  background:
    radial-gradient(700px 300px at 85% -10%, rgba(91, 140, 255, 0.16), transparent 60%),
    radial-gradient(500px 260px at 5% 110%, rgba(62, 230, 196, 0.1), transparent 60%),
    var(--bg-2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.breadcrumb { font-size: 13.5px; color: var(--muted); margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { margin: 0 8px; opacity: 0.5; }

.page-hero h1 { font-size: clamp(30px, 4.5vw, 48px); font-weight: 800; }
.page-hero .lead { margin-top: 18px; color: var(--muted); max-width: 720px; font-size: 17px; }

/* 子服务区块 */

.subsvc {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.subsvc.cols-4 { grid-template-columns: repeat(4, 1fr); }

.sub-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.sub-card:hover { transform: translateY(-4px); border-color: rgba(91, 140, 255, 0.45); }

.sub-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sub-card h3 .num {
  font-size: 13px;
  color: var(--accent);
  border: 1px solid rgba(62, 230, 196, 0.4);
  border-radius: 6px;
  padding: 1px 8px;
  font-weight: 600;
}

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

/* 图文分栏 */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 72px 0;
}

.split + .split { border-top: 1px solid rgba(255, 255, 255, 0.06); }

.split.reverse > .split-media { order: 2; }

.split-media img { border-radius: var(--radius); box-shadow: var(--shadow); }

.split-body h2 { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 16px; }
.split-body > p { color: var(--muted); }

.check-list { margin-top: 22px; display: grid; gap: 12px; }

.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: #c3cbdc;
  font-size: 15px;
}

.check-list svg { flex: none; width: 20px; height: 20px; color: var(--accent); margin-top: 4px; }

/* 流程步骤 */

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
  counter-reset: step;
}

.step {
  position: relative;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px 24px 26px;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 30px;
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
}

.step h3 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14px; }

/* 联系页 */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.contact-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 36px 30px;
  text-align: center;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.contact-card:hover { transform: translateY(-4px); border-color: rgba(62, 230, 196, 0.4); }

.contact-card .svc-icon { margin: 0 auto 20px; }

.contact-card h3 { font-size: 16px; color: var(--muted); font-weight: 500; margin-bottom: 10px; }

.contact-card .value {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  word-break: break-all;
}

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

.contact-note {
  margin-top: 40px;
  text-align: center;
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------- 动效 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .svc-grid, .subsvc, .subsvc.cols-4, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
  .about-split, .split { grid-template-columns: 1fr; gap: 36px; }
  .split.reverse > .split-media { order: 0; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  section { padding: 64px 0; }

  .nav-toggle { display: block; }

  .nav-menu {
    position: fixed;
    inset: 0;
    background: rgba(8, 11, 20, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 105;
  }

  .nav-menu.open { opacity: 1; pointer-events: auto; }

  .nav-menu a { font-size: 20px; padding: 12px 28px; }
  .nav-cta { margin: 18px 0 0; }

  .hero { min-height: auto; padding-top: calc(var(--nav-h) + 48px); }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .facts-grid { grid-template-columns: 1fr; }
  .fact { padding: 20px; }

  .svc-grid, .subsvc, .contact-grid, .steps, .partner-grid, .footer-grid {
    grid-template-columns: 1fr;
  }

  .cta-banner { padding: 44px 24px; }
  .footer-bottom { justify-content: center; text-align: center; }
}