/* ============================================================
   梦幻科技企业官网 - 全站样式
   风格：简约大气 · 深蓝商务
   ============================================================ */
:root {
  --primary: #16325c;
  --primary-dark: #0d2038;
  --accent: #2f6df6;
  --accent-light: #e8f0ff;
  --gold: #d9a94e;
  --text: #2c3e50;
  --text-light: #7a8794;
  --bg-gray: #f5f7fa;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(22, 50, 92, .10);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; transition: color .2s; }
ul { list-style: none; }
img { max-width: 100%; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #edf1f7;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; font-size: 20px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text strong { font-size: 18px; color: var(--primary); letter-spacing: 1px; }
.logo-text em { font-style: normal; font-size: 11px; color: var(--text-light); letter-spacing: 3px; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  padding: 8px 16px; border-radius: 8px; font-size: 15px; color: var(--text);
}
.nav a:hover { color: var(--accent); }
.nav a.active { color: var(--accent); background: var(--accent-light); font-weight: 600; }
.nav-cta {
  margin-left: 10px;
  background: var(--accent); color: #fff !important;
  padding: 9px 22px !important; border-radius: 999px !important;
}
.nav-cta:hover { background: #2558cc; }

.menu-toggle { display: none; background: none; border: 0; font-size: 24px; cursor: pointer; color: var(--primary); }

/* ---------- 通用区块 ---------- */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-gray); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head .kicker {
  display: inline-block; font-size: 13px; letter-spacing: 4px;
  color: var(--accent); text-transform: uppercase; margin-bottom: 8px;
}
.section-head h2 { font-size: 32px; color: var(--primary); letter-spacing: 1px; }
.section-head p { color: var(--text-light); margin-top: 10px; }
.section-head .line {
  width: 48px; height: 3px; background: var(--accent);
  margin: 18px auto 0; border-radius: 2px;
}

.btn {
  display: inline-block; padding: 12px 34px; border-radius: 999px;
  font-size: 15px; transition: all .25s; cursor: pointer; border: 0;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #2558cc; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(47,109,246,.35); }
.btn-ghost { border: 1px solid rgba(255,255,255,.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }

/* ---------- 首页 Banner ---------- */
.hero {
  position: relative; min-height: 560px;
  display: flex; align-items: center;
  background:
    radial-gradient(1000px 400px at 85% -10%, rgba(47,109,246,.45), transparent 60%),
    radial-gradient(700px 400px at 10% 110%, rgba(217,169,78,.25), transparent 60%),
    linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #1e4680 100%);
  color: #fff; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero-inner { position: relative; z-index: 1; max-width: 760px; }
.hero .tag {
  display: inline-block; border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px; padding: 5px 16px; font-size: 13px;
  letter-spacing: 2px; margin-bottom: 22px; color: #cfe0ff;
}
.hero h1 { font-size: 46px; line-height: 1.3; letter-spacing: 2px; }
.hero h1 span { color: var(--gold); }
.hero .sub { margin-top: 18px; font-size: 17px; color: rgba(255,255,255,.78); max-width: 620px; }
.hero-actions { margin-top: 34px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  position: relative; z-index: 1;
  display: flex; gap: 0; margin-top: 70px;
  border-top: 1px solid rgba(255,255,255,.15); padding-top: 30px;
  flex-wrap: wrap;
}
.hero-stats .stat { flex: 1; min-width: 140px; }
.hero-stats .num { font-size: 34px; font-weight: 700; color: #fff; }
.hero-stats .num i { font-style: normal; color: var(--gold); font-size: 20px; }
.hero-stats .label { color: rgba(255,255,255,.6); font-size: 13px; letter-spacing: 1px; }

/* ---------- 首页业务板块 ---------- */
.biz-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.biz-card {
  background: var(--white); border-radius: var(--radius); padding: 32px 26px;
  border: 1px solid #edf1f7; transition: all .3s; position: relative; overflow: hidden;
}
.biz-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.biz-card .icon { font-size: 34px; margin-bottom: 18px; }
.biz-card h3 { font-size: 18px; color: var(--primary); margin-bottom: 10px; }
.biz-card p { font-size: 13.5px; color: var(--text-light); }
.biz-card .more {
  display: inline-block; margin-top: 16px; font-size: 13px; color: var(--accent);
}
.biz-card::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 3px; width: 0;
  background: var(--accent); transition: width .3s;
}
.biz-card:hover::after { width: 100%; }

/* ---------- 精选服务 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.svc-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  border: 1px solid #edf1f7; transition: all .3s; display: flex; flex-direction: column;
}
.svc-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.svc-card .cover {
  height: 110px; display: flex; align-items: center; justify-content: center;
  font-size: 44px;
  background: linear-gradient(135deg, var(--accent-light), #f2f7ff);
}
.svc-card .body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.svc-card .cat {
  font-size: 12px; color: var(--accent); background: var(--accent-light);
  align-self: flex-start; padding: 2px 10px; border-radius: 999px; margin-bottom: 10px;
}
.svc-card h3 { font-size: 17px; color: var(--primary); margin-bottom: 8px; }
.svc-card p { font-size: 13.5px; color: var(--text-light); flex: 1; }

/* ---------- 关于/优势 ---------- */
.about-brief { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.about-brief h2 { font-size: 30px; color: var(--primary); margin-bottom: 18px; }
.about-brief p { color: var(--text-light); margin-bottom: 12px; }
.about-visual {
  border-radius: 16px; min-height: 320px;
  background:
    radial-gradient(400px 200px at 80% 20%, rgba(47,109,246,.5), transparent 60%),
    linear-gradient(135deg, var(--primary-dark), #1e4680);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.9); font-size: 20px; letter-spacing: 4px;
}

.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; margin-top: 40px; }
.value-item { text-align: center; padding: 26px 18px; border-radius: var(--radius); background: var(--white); border: 1px solid #edf1f7; }
.value-item .icon { font-size: 30px; }
.value-item h4 { color: var(--primary); margin: 10px 0 6px; font-size: 16px; }
.value-item p { font-size: 13px; color: var(--text-light); }

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--primary-dark), var(--accent));
  color: #fff; padding: 56px 0; text-align: center;
}
.cta-band h2 { font-size: 26px; margin-bottom: 10px; }
.cta-band p { color: rgba(255,255,255,.75); margin-bottom: 24px; }

/* ---------- 页面 Banner（内页） ---------- */
.page-banner {
  background:
    radial-gradient(700px 300px at 90% 0%, rgba(47,109,246,.4), transparent 60%),
    linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff; padding: 64px 0; text-align: center;
}
.page-banner h1 { font-size: 34px; letter-spacing: 2px; }
.page-banner p { color: rgba(255,255,255,.7); margin-top: 8px; font-size: 14px; letter-spacing: 1px; }

/* ---------- 关于我们 ---------- */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 6px; bottom: 6px; width: 2px; background: #e3eaf5; }
.timeline-item { position: relative; padding: 0 0 34px 22px; }
.timeline-item::before {
  content: ""; position: absolute; left: -27px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px var(--accent-light);
}
.timeline-item .year { font-weight: 700; color: var(--accent); font-size: 17px; }
.timeline-item h4 { color: var(--primary); margin: 4px 0; }
.timeline-item p { color: var(--text-light); font-size: 14px; }

/* ---------- 产品服务列表 ---------- */
.svc-section { margin-bottom: 56px; }
.svc-section-head { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.svc-section-head .icon {
  width: 52px; height: 52px; border-radius: 12px; font-size: 26px;
  background: var(--accent-light); display: flex; align-items: center; justify-content: center;
}
.svc-section-head h2 { font-size: 22px; color: var(--primary); }
.svc-section-head p { font-size: 13px; color: var(--text-light); }

/* ---------- 联系我们 ---------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: start; }
.contact-info-card {
  background: linear-gradient(160deg, var(--primary-dark), var(--primary));
  border-radius: 16px; color: #fff; padding: 38px 34px;
}
.contact-info-card h3 { font-size: 22px; margin-bottom: 24px; }
.contact-info-card ul li { display: flex; gap: 12px; margin-bottom: 20px; font-size: 14.5px; color: rgba(255,255,255,.85); }
.contact-info-card ul li b { display: block; color: #fff; font-size: 15px; margin-bottom: 2px; }

.form-card {
  background: var(--white); border: 1px solid #edf1f7; border-radius: 16px;
  padding: 38px 34px; box-shadow: var(--shadow);
}
.form-card h3 { font-size: 20px; color: var(--primary); margin-bottom: 20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13.5px; color: var(--text); margin-bottom: 6px; }
.form-group label span { color: #e05656; }
.form-group input, .form-group textarea {
  width: 100%; padding: 11px 14px; border: 1px solid #dde4ee; border-radius: 8px;
  font-size: 14px; font-family: inherit; transition: border .2s; background: #fbfcfe;
}
.form-group input:focus, .form-group textarea:focus { outline: 0; border-color: var(--accent); background: #fff; }
.form-group textarea { min-height: 120px; resize: vertical; }
.form-full { grid-column: 1 / -1; }
.form-msg { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.form-msg.ok { background: #e9f9f0; color: #0a8f4e; border: 1px solid #bce8cf; }
.form-msg.err { background: #fff2f2; color: #d33; border: 1px solid #f3caca; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--primary-dark); color: rgba(255,255,255,.65); margin-top: 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px; padding: 60px 24px 40px;
}
.footer-logo { margin-bottom: 14px; color: #fff; }
.footer-logo .logo-mark { width: 36px; height: 36px; font-size: 17px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col ul li { margin-bottom: 10px; font-size: 13.5px; }
.footer-col ul li a:hover { color: #fff; }
.footer-about p { font-size: 13.5px; line-height: 1.9; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0;
  text-align: center; font-size: 12.5px; color: rgba(255,255,255,.4);
}
.footer-bottom .icp-link { color: rgba(255,255,255,.4); text-decoration: none; }
.footer-bottom .icp-link:hover { color: rgba(255,255,255,.75); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .biz-grid, .svc-grid, .value-grid { grid-template-columns: repeat(2, 1fr); }
  .about-brief, .contact-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero h1 { font-size: 34px; }
  .menu-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 12px 20px 20px; box-shadow: 0 12px 24px rgba(0,0,0,.08);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 8px; border-bottom: 1px solid #f2f5fa; }
  .nav-cta { margin: 14px 0 0; text-align: center; }
}
@media (max-width: 560px) {
  .biz-grid, .svc-grid, .value-grid, .form-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { min-height: 480px; }
}