/* ===== 全局重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #1a56db;
  --primary-dark: #0f3d9c;
  --primary-light: #3b82f6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --gray-900: #1e293b;
  --gray-700: #334155;
  --gray-500: #64748b;
  --gray-300: #cbd5e1;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 6px rgba(0,0,0,.07), 0 10px 30px rgba(0,0,0,.1);
  --radius: 12px;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--gray-700);
  line-height: 1.7;
  background: var(--white);
  overflow-x: hidden;
}

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

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(0,0,0,.06);
  transition: box-shadow .3s;
}
.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  padding: 0 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark);
}
.nav-logo .logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem; font-weight: 800;
}
.nav-logo .logo-sub { font-size: .72rem; color: var(--gray-500); font-weight: 400; display: block; margin-top: -2px; }
.nav-links {
  display: flex;
  gap: 8px;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: all .2s;
}
.nav-links a:hover { background: var(--gray-100); color: var(--primary); }
.nav-links a.active { background: var(--primary); color: #fff; }

/* ===== 通用容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 140px 0 100px;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a56db 100%);
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(6,182,212,.15), transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -150px; left: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,.12), transparent 70%);
  border-radius: 50%;
}
.hero-content { position: relative; z-index: 2; max-width: 680px; }
.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  letter-spacing: -.5px;
}
.hero h1 .highlight { color: var(--accent); }
.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  transition: all .25s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(26,86,219,.35); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.3);
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.1); }

/* ===== 小型页头(内页) ===== */
.page-hero {
  padding: 120px 0 64px;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 60%, #1a56db 100%);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(6,182,212,.12), transparent 70%);
  border-radius: 50%;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 2.4rem; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 1.05rem; color: rgba(255,255,255,.7); }

/* ===== 区块通用 ===== */
.section { padding: 80px 0; }
.section-gray { background: var(--gray-50); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 {
  font-size: 2rem; font-weight: 800; color: var(--dark); margin-bottom: 12px;
}
.section-header .divider {
  width: 48px; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin: 0 auto 16px;
}
.section-header p { color: var(--gray-500); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }

/* ===== 卡片网格 ===== */
.grid {
  display: grid;
  gap: 28px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow);
  transition: all .3s;
  border: 1px solid var(--gray-100);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--gray-300); }
.card-icon {
  width: 56px; height: 56px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.card h3 { font-size: 1.25rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.card p { color: var(--gray-500); font-size: .95rem; line-height: 1.8; }

/* ===== 数字统计 ===== */
.stats {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 64px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; text-align: center; }
.stat-item .num { font-size: 2.6rem; font-weight: 800; }
.stat-item .label { font-size: .95rem; color: rgba(255,255,255,.75); margin-top: 4px; }

/* ===== 关于我们 ===== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-text h2 { font-size: 1.8rem; font-weight: 800; color: var(--dark); margin-bottom: 20px; }
.about-text p { color: var(--gray-700); margin-bottom: 16px; line-height: 1.9; }
.about-visual {
  height: 360px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #1e3a5f, #1a56db);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.about-visual::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(6,182,212,.3), transparent 60%);
}
.about-visual span { position: relative; z-index: 2; color: #fff; font-size: 1.3rem; font-weight: 700; text-align: center; }

/* 企业文化 */
.culture-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; }
.culture-item { text-align: center; padding: 36px 24px; background: var(--gray-50); border-radius: var(--radius); }
.culture-item .ci-icon { font-size: 2.2rem; margin-bottom: 16px; }
.culture-item h4 { font-size: 1.2rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.culture-item p { color: var(--gray-500); font-size: .92rem; }

/* 发展历程 */
.timeline { position: relative; max-width: 760px; margin: 0 auto; }
.timeline::before { content: ""; position: absolute; left: 20px; top: 0; bottom: 0; width: 2px; background: var(--gray-300); }
.timeline-item { position: relative; padding-left: 56px; margin-bottom: 36px; }
.timeline-item::before { content: ""; position: absolute; left: 13px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--primary); }
.timeline-item .year { font-size: 1.3rem; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.timeline-item h4 { font-size: 1.05rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.timeline-item p { color: var(--gray-500); font-size: .92rem; }

/* ===== 产品服务页 ===== */
.service-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all .3s; border: 1px solid var(--gray-100); }
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card .sc-head {
  padding: 36px 28px 24px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
}
.service-card .sc-icon { font-size: 2rem; margin-bottom: 12px; }
.service-card .sc-head h3 { font-size: 1.3rem; font-weight: 700; }
.service-card .sc-body { padding: 28px; }
.service-card .sc-body p { color: var(--gray-500); font-size: .93rem; margin-bottom: 16px; }
.service-card .sc-list li { padding: 8px 0; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); font-size: .9rem; display: flex; align-items: center; gap: 8px; }
.service-card .sc-list li:last-child { border-bottom: none; }
.service-card .sc-list li::before { content: "✓"; color: var(--primary); font-weight: 700; }

/* 流程 */
.process-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.process-step { text-align: center; position: relative; }
.process-step .ps-num {
  width: 64px; height: 64px; margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-size: 1.4rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.process-step h4 { font-size: 1.05rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.process-step p { color: var(--gray-500); font-size: .88rem; }

/* ===== 联系我们 ===== */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info h2 { font-size: 1.6rem; font-weight: 800; color: var(--dark); margin-bottom: 24px; }
.contact-list li { display: flex; align-items: flex-start; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--gray-100); }
.contact-list .ci-ic { width: 44px; height: 44px; border-radius: 10px; background: var(--gray-100); display: flex; align-items: center; justify-content: center; font-size: 1.2rem; flex-shrink: 0; }
.contact-list .ci-label { font-size: .82rem; color: var(--gray-500); margin-bottom: 2px; }
.contact-list .ci-value { font-size: 1rem; color: var(--dark); font-weight: 600; }
.contact-form { background: var(--gray-50); border-radius: var(--radius); padding: 40px; }
.contact-form h3 { font-size: 1.3rem; font-weight: 700; color: var(--dark); margin-bottom: 24px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; color: var(--gray-700); margin-bottom: 8px; }
.form-group input, .form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: .95rem;
  font-family: inherit;
  transition: border-color .2s;
  background: #fff;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 120px; }
.contact-form .btn { width: 100%; justify-content: center; }

/* 地图占位 */
.map-box {
  margin-top: 48px;
  height: 320px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #e0e7ff, #dbeafe);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-500); font-size: 1rem;
  border: 1px solid var(--gray-100);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.6);
  padding: 56px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
.footer-brand .nav-logo .logo-sub { color: rgba(255,255,255,.5); }
.footer-brand p { font-size: .9rem; line-height: 1.8; max-width: 300px; }
.footer-col h5 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; }
.footer-col li a { font-size: .9rem; color: rgba(255,255,255,.6); transition: color .2s; }
.footer-col li a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  text-align: center;
  font-size: .85rem;
}
.footer-bottom a { color: rgba(255,255,255,.5); }
.footer-bottom a:hover { color: #fff; }

/* ===== 回到顶部 ===== */
/* (纯CSS无JS，使用锚点) */

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .grid-3, .grid-4, .stats-grid, .culture-grid, .process-grid { grid-template-columns: repeat(2,1fr); }
  .grid-2, .about-intro, .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 2.2rem; }
  .nav-links a { padding: 8px 10px; font-size: .88rem; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4, .stats-grid, .culture-grid, .process-grid, .footer-grid { grid-template-columns: 1fr; }
  .hero { padding: 110px 0 70px; }
  .hero h1 { font-size: 1.8rem; }
  .hero p { font-size: 1rem; }
  .section { padding: 56px 0; }
  .section-header h2 { font-size: 1.5rem; }
  .page-hero h1 { font-size: 1.8rem; }
  .nav-logo .logo-sub { display: none; }
  .nav-links { gap: 2px; }
  .nav-links a { padding: 6px 8px; font-size: .82rem; }
  .contact-form { padding: 24px; }
}