/* ===== 基础变量 ===== */
:root {
  --bg: #0b1220;
  --bg-alt: #0f1a2e;
  --card: #131f36;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eef7;
  --text-dim: #9db0c9;
  --primary: #22d3ee;
  --primary-dark: #0891b2;
  --accent: #3b82f6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

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

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

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

h1, h2, h3, h4 { line-height: 1.3; }

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #04121f;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(34, 211, 238, 0.35); }
.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.nav-contact {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  padding: 8px 20px;
  font-size: 14px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: 0.25s;
}
.nav-contact:hover { border-color: var(--primary); color: var(--primary); }
.btn-block { width: 100%; }

/* ===== 导航 ===== */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  padding: 14px 0;
  background: transparent;
  transition: background 0.3s, box-shadow 0.3s, padding 0.3s;
}
.navbar.scrolled {
  background: rgba(11, 18, 32, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  padding: 10px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.logo-mark {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #04121f;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
}
.logo-text { font-size: 19px; font-weight: 700; color: var(--text); letter-spacing: 1px; }
.logo-text small {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2.5px;
  color: var(--primary);
  line-height: 1.2;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-phone { color: var(--primary); font-weight: 600; }
.nav-actions { display: flex; align-items: center; }
.nav-call {
  display: none;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #04121f;
  text-decoration: none;
  font-size: 17px;
  margin-right: 12px;
}
.nav-toggle { display: none; background: none; border: none; cursor: pointer; }
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--text); margin: 5px 0;
  transition: 0.3s;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 170px 0 40px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  top: -200px; right: -100px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18), transparent 65%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: flex;
  justify-content: center;
  text-align: center;
}
.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--primary);
  background: rgba(34, 211, 238, 0.06);
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(120deg, #fff 30%, var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { color: var(--text-dim); font-size: 17px; margin-bottom: 30px; max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-sub strong { color: var(--text); }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 26px; justify-content: center; }
.hero-points { display: flex; gap: 22px; list-style: none; flex-wrap: wrap; justify-content: center; }
.hero-points li { color: var(--text-dim); font-size: 14px; }
.hero-tag { margin-left: auto; margin-right: auto; }

/* ===== 数据条 ===== */
.stats { padding: 30px 0 10px; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: center;
}
.stat {
  padding: 22px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
}
.stat strong {
  display: block;
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
}
.stat span { color: var(--text-dim); font-size: 14px; }

/* ===== 通用版块 ===== */
.section { padding: 55px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: #0a1626; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 35px; }
.section-tag {
  color: var(--primary);
  font-size: 13px;
  letter-spacing: 4px;
  font-weight: 600;
  margin-bottom: 8px;
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.08);
}
.section-head h2 { font-size: clamp(26px, 3.2vw, 36px); margin-bottom: 12px; }
.section-desc { color: var(--text-dim); }

/* ===== 卡片 ===== */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.4);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.4);
}
.service-card img { width: 100%; aspect-ratio: 4 / 3; height: auto; object-fit: contain; object-position: center; background: #0b1220; display: block; }
.service-card h3 { font-size: 19px; padding: 18px 22px 8px; }
.service-card p { color: var(--text-dim); font-size: 14px; padding: 0 22px 12px; }
.service-card ul { list-style: none; padding: 0 22px 22px; }
.service-card li {
  font-size: 13px;
  color: var(--primary);
  padding: 3px 0;
}
.service-card li::before { content: "▸ "; }

/* ===== 案例标签（案例分享/详情页共用） ===== */
.case-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 10px;
}

/* ===== 案例分享 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.3s, border-color 0.3s;
}
.post-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.4);
}
.cases-more { text-align: right; margin-top: 30px; }
.post-card-more {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.04);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition: 0.3s;
}
.post-card-more:hover {
  border-color: var(--primary);
  background: rgba(34, 211, 238, 0.1);
  transform: translateY(-6px);
}
.post-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.post-meta time { color: var(--text-dim); font-size: 13px; }
.post-card h3 { font-size: 19px; margin-bottom: 10px; }
.post-card p {
  color: var(--text-dim);
  font-size: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 技术实力 ===== */
.tech-wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 1100px; margin: 0 auto; }
.tech-group {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.3s, border-color 0.3s;
}
.tech-group:hover { transform: translateY(-6px); border-color: rgba(34, 211, 238, 0.4); }
.tech-group h4 { color: var(--primary); font-size: 17px; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid rgba(34, 211, 238, 0.25); }
.tech-tags { display: flex; flex-wrap: wrap; gap: 12px; }
.tech-tags span {
  padding: 8px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  font-size: 14px;
  transition: 0.25s;
}
.tech-tags span:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ===== 流程 ===== */
.process-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px;
  counter-reset: step;
}
.process-grid li {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 18px;
  transition: transform 0.3s, border-color 0.3s;
}
.process-grid li:hover { transform: translateY(-4px); border-color: rgba(34, 211, 238, 0.4); }
.process-grid span {
  display: block;
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
}
.process-grid h4 { font-size: 16px; margin-bottom: 6px; }
.process-grid p { font-size: 13px; color: var(--text-dim); }

/* ===== 关于 ===== */
/* ===== 关于我们 + 联系我们 ===== */
.about-contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: stretch;
}
.about-text, .contact-text {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.3s;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.about-text:hover, .contact-text:hover { border-color: rgba(34, 211, 238, 0.4); }
.about-text h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 18px; }
.about-text p { color: var(--text-dim); margin-bottom: 14px; font-size: 15.5px; }
.about-text strong { color: var(--text); }
.about-list { list-style: none; margin-top: 18px; }
.about-list li { color: var(--text); font-size: 15px; padding: 5px 0; }

.contact-text h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 14px; }
.contact-lead { color: var(--text-dim); margin-bottom: 24px; font-size: 15.5px; }
.contact-list { list-style: none; }
.contact-list li { padding: 8px 0; font-size: 15.5px; color: var(--text-dim); }
.contact-list strong { color: var(--primary); font-size: 18px; }

/* ===== 页脚 ===== */
.footer {
  border-top: 1px solid var(--border);
  padding: 26px 0;
  background: #08101d;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--text-dim);
  font-size: 13.5px;
}
.footer-inner a {
  color: var(--text-dim);
  text-decoration: none;
}
.footer-inner a:hover {
  color: var(--cyan);
}

/* ===== 滚动显现动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  .about-contact-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 130px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .tech-wrap { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(3, 1fr); }
  .nav-links {
    position: fixed;
    top: 64px; left: 0; right: 0;
    flex-direction: column;
    background: rgba(11, 18, 32, 0.98);
    padding: 24px 0 30px;
    gap: 18px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-130%);
    transition: transform 0.35s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-call { display: grid; }
  .nav-toggle { display: block; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
}

@media (max-width: 600px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 40px 0; }
  .hero { padding: 110px 0 50px; }
  .hero-tag { font-size: 12px; }
  .hero-sub { font-size: 15.5px; }
  .hero-actions .btn { flex: 1 1 auto; text-align: center; }
  .hero-points { gap: 12px; }
  .hero-points li { font-size: 13px; }
  .stat strong { font-size: 28px; }
  .post-card { padding: 20px; }
  .contact-list li { font-size: 14.5px; }
  .contact-list strong { font-size: 16.5px; }
  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
}