/* =========================================================
   长沙数绘星河科技有限公司 · 企业官网样式
   设计基调：简约大气 · 浅色背景 + 深蓝主色 + 白色卡片
   字体：Noto Sans SC
   约束：严禁深色背景，统一浅底深字
   ========================================================= */

:root {
  /* 主色 */
  --c-primary: #1d4e89;
  --c-primary-dark: #163c6b;
  --c-primary-light: #2f6cb0;

  /* 辅助色（从 logo 星河图形提取：青蓝、紫、金） */
  --c-accent: #0ea5e9;        /* 青蓝 */
  --c-accent-soft: #e0f2fe;
  --c-accent-purple: #7c3aed; /* 紫 */
  --c-accent-purple-soft: #ede9fe;
  --c-accent-amber: #f59e0b;  /* 金 */
  --c-accent-amber-soft: #fef3c7;

  /* 背景 */
  --bg-page: #f5f8fc;
  --bg-soft: #eef4fb;
  --bg-card: #ffffff;
  --bg-hero:
    radial-gradient(1200px 600px at 80% -10%, rgba(14, 165, 233, 0.12), transparent),
    radial-gradient(1000px 500px at 20% 110%, rgba(124, 58, 237, 0.10), transparent),
    radial-gradient(900px 450px at 55% 55%, rgba(245, 158, 11, 0.06), transparent),
    linear-gradient(160deg, #f3f8ff 0%, #eaf1fb 50%, #f8f6ff 100%);

  /* 文字 */
  --text-title: #16263d;
  --text-body: #3b4a5e;
  --text-muted: #6b7c92;
  --text-invert: #ffffff;

  /* 边框/分割 */
  --border: #e2e9f2;
  --border-strong: #cdd9e8;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(29, 78, 137, 0.06);
  --shadow-md: 0 8px 24px rgba(29, 78, 137, 0.10);
  --shadow-lg: 0 18px 48px rgba(29, 78, 137, 0.14);

  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1180px;

  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text-body);
  background: var(--bg-page);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
}
.brand .logo-mark {
  width: auto;
  height: 42px;
  flex: none;
  display: block;
}
.brand .brand-name {
  font-weight: 800;
  font-size: 18px;
  color: var(--text-title);
  letter-spacing: .3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  padding: 9px 16px;
  border-radius: 999px;
  color: var(--text-body);
  font-size: 15px;
  font-weight: 500;
  transition: background .2s, color .2s;
}
.nav-links a:hover { background: var(--bg-soft); color: var(--c-primary); }
.nav-links a.active { background: var(--c-primary); color: #fff; }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 18px;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: .25s;
}
.nav-toggle span { top: 50%; margin-top: -1px; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

/* ============ 通用区块 ============ */
.section { padding: 88px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--c-primary);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 900;
  color: var(--text-title);
  letter-spacing: .5px;
  line-height: 1.3;
}
.section-head p {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 16px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform .15s, background .2s, box-shadow .2s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
  color: #fff;
}
.btn-primary:hover { background: linear-gradient(135deg, var(--c-primary-dark) 0%, var(--c-primary) 100%); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--c-primary); transform: translateY(-2px); }

/* ============ Hero ============ */
.hero {
  position: relative;
  background: var(--bg-hero);
  overflow: hidden;
  padding: 96px 0 104px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
  background: #fff;
  border: 1px solid var(--border);
  padding: 7px 15px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-accent-soft);
}
.hero h1 {
  font-size: 46px;
  line-height: 1.25;
  font-weight: 900;
  letter-spacing: .5px;
  background: linear-gradient(135deg, #16263d 0%, var(--c-primary) 55%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h1 .hl { color: var(--c-primary); -webkit-text-fill-color: var(--c-primary); }
.hero .lead {
  margin: 22px 0 32px;
  font-size: 17px;
  color: var(--text-muted);
  max-width: 520px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stats .item .num {
  font-size: 30px;
  font-weight: 900;
  color: var(--c-primary);
}
.hero-stats .item .label { font-size: 13px; color: var(--text-muted); }

/* Hero 视觉（星河/数据流 SVG） */
.hero-visual {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  padding: 26px;
}
.hero-visual .panel-title {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; color: var(--text-title); margin-bottom: 16px;
}
.hero-visual .panel-title .pulse {
  width: 10px; height: 10px; border-radius: 50%; background: var(--c-accent);
  box-shadow: 0 0 0 5px var(--c-accent-soft);
  animation: pulse 1.8s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

/* 装饰星点 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(2px 2px at 12% 22%, rgba(29,78,137,.18), transparent),
    radial-gradient(2px 2px at 78% 12%, rgba(47,108,176,.16), transparent),
    radial-gradient(1.5px 1.5px at 33% 68%, rgba(29,78,137,.14), transparent),
    radial-gradient(1.5px 1.5px at 62% 80%, rgba(47,108,176,.14), transparent),
    radial-gradient(2px 2px at 88% 56%, rgba(29,78,137,.12), transparent);
  pointer-events: none;
}

/* ============ 业务卡片 ============ */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 28px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
  position: relative;
  overflow: hidden;
}
.card::after {
  content: "";
  position: absolute; left: 0; top: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-primary), var(--c-accent-purple));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border-strong); }
.card:hover::after { transform: scaleX(1); }
.card .icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  color: var(--c-primary);
}
.card:nth-child(3n+1) .icon { background: var(--c-accent-soft); color: var(--c-accent); }
.card:nth-child(3n+2) .icon { background: var(--c-accent-purple-soft); color: var(--c-accent-purple); }
.card:nth-child(3n+3) .icon { background: var(--c-accent-amber-soft); color: var(--c-accent-amber); }
.card h3 { font-size: 19px; color: var(--text-title); margin-bottom: 10px; font-weight: 700; }
.card p { font-size: 14.5px; color: var(--text-muted); }
.card .tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.card .tags span {
  font-size: 12px;
  color: var(--c-primary);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ============ 优势 ============ */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 26px 24px;
}
.feature .fnum {
  font-size: 14px; font-weight: 800; color: var(--c-primary);
  background: var(--bg-soft); display: inline-block;
  width: 34px; height: 34px; line-height: 34px; text-align: center;
  border-radius: 9px; margin-bottom: 14px;
}
.feature:nth-child(3n+1) .fnum { background: var(--c-accent-soft); color: var(--c-accent); }
.feature:nth-child(3n+2) .fnum { background: var(--c-accent-purple-soft); color: var(--c-accent-purple); }
.feature:nth-child(3n+3) .fnum { background: var(--c-accent-amber-soft); color: var(--c-accent-amber); }
.feature h4 { font-size: 16px; color: var(--text-title); margin-bottom: 8px; font-weight: 700; }
.feature p { font-size: 14px; color: var(--text-muted); }

/* ============ 流程 ============ */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
}
.step {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 24px 20px;
  position: relative;
  text-align: center;
}
.step .step-no {
  width: 40px; height: 40px; line-height: 40px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  color: #fff; font-weight: 800;
}
.step h4 { font-size: 15px; color: var(--text-title); margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--text-muted); }

/* ============ CTA 横幅 ============ */
.cta-band {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 22px;
  padding: 54px 48px;
  text-align: center;
  color: var(--text-title);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(420px 180px at 15% -10%, rgba(14, 165, 233, .10), transparent),
    radial-gradient(420px 180px at 85% 110%, rgba(124, 58, 237, .10), transparent),
    radial-gradient(520px 240px at 50% 50%, rgba(245, 158, 11, .05), transparent);
  pointer-events: none;
}
.cta-band h2 { font-size: 30px; font-weight: 900; margin-bottom: 12px; position: relative; }
.cta-band p { color: var(--text-muted); margin-bottom: 26px; font-size: 16px; position: relative; }
.cta-band .btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--border-strong); position: relative; }

/* ============ 页脚 ============ */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: 36px;
  margin-bottom: 40px;
  align-items: start;
}
.footer-brand .name { font-weight: 800; color: var(--text-title); font-size: 18px; margin-bottom: 10px; }
.footer-brand p { font-size: 14px; color: var(--text-muted); max-width: 300px; }
.footer-col h5 { font-size: 15px; color: var(--text-title); margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; font-size: 14px; color: var(--text-muted); padding: 5px 0; transition: color .2s; }
.footer-col a:hover { color: var(--c-primary); }
.footer-contact { list-style: none; padding: 0; margin: 0; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-muted);
  padding: 5px 0;
}
.footer-contact li b {
  flex: 0 0 64px;
  color: var(--text-title);
  font-weight: 600;
  text-align: right;
}
.footer-contact li a { word-break: break-all; }
.footer-contact .contact-wechat {
  align-items: flex-start;
  padding-top: 10px;
}
.footer-contact .wecom-qr {
  width: 120px;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  display: block;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex;
  flex-direction: column;    /* 改为纵向排列 */
  align-items: center;       /* 水平居中 */
  gap: 6px;                 /* 两行间距调小一点，更美观 */
  font-size: 13px;
  color: #b5cbe6;
  text-align: center;       /* 文本居中备用 */
}
.footer-bottom a { color: #b5cbe6; }

/* ============ 关于我们 ============ */
.page-hero {
  background: var(--bg-hero);
  padding: 70px 0 64px;
  border-bottom: 1px solid var(--border);
}
.page-hero .eyebrow { margin-bottom: 14px; }
.page-hero h1 { font-size: 40px; font-weight: 900; color: var(--text-title); letter-spacing: .5px; }
.page-hero p { margin-top: 14px; color: var(--text-muted); max-width: 640px; font-size: 16px; }

.about-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.about-intro h2 { font-size: 28px; font-weight: 800; color: var(--text-title); margin-bottom: 18px; }
.about-intro p { color: var(--text-body); margin-bottom: 14px; }
.about-figure {
  background: #fff; border: 1px solid var(--border); border-radius: 18px;
  padding: 28px; box-shadow: var(--shadow-md);
}
.about-figure .stat-row { display: flex; justify-content: space-between; padding: 14px 0; border-bottom: 1px dashed var(--border); }
.about-figure .stat-row:last-child { border-bottom: none; }
.about-figure .stat-row b { color: var(--c-primary); font-size: 22px; }
.about-figure .stat-row span { color: var(--text-muted); font-size: 14px; }

.mission-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.mission {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px;
}
.mission .micon { color: var(--c-primary); margin-bottom: 14px; }
.mission h3 { font-size: 18px; color: var(--text-title); margin-bottom: 10px; }
.mission p { font-size: 14.5px; color: var(--text-muted); }

/* ============ 产品服务详情 ============ */

.svc-detail {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px;
}
.svc-block {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 30px; transition: box-shadow .2s, transform .2s;
}
.svc-block:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.svc-block .svc-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.svc-block .svc-head .icon {
  width: 50px; height: 50px; border-radius: 13px; background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center; color: var(--c-primary); flex: none;
}
.svc-block h3 { font-size: 20px; color: var(--text-title); font-weight: 700; }
.svc-block .svc-sub { font-size: 13px; color: var(--c-primary); font-weight: 600; }
.svc-block p { font-size: 14.5px; color: var(--text-body); margin-bottom: 16px; }
.svc-block ul.check li {
  font-size: 14px; color: var(--text-body); padding: 7px 0 7px 28px; position: relative;
  border-top: 1px solid var(--border);
}
.svc-block ul.check li:first-child { border-top: none; }
.svc-block ul.check li::before {
  content: "✓"; position: absolute; left: 0; top: 7px;
  color: var(--c-accent); font-weight: 800;
}

/* ============ 联系我们 ============ */

.form-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 30px; box-shadow: var(--shadow-sm);
}
.form-card h3 { font-size: 20px; color: var(--text-title); margin-bottom: 6px; }
.form-card .sub { font-size: 14px; color: var(--text-muted); margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--text-title); font-weight: 600; margin-bottom: 7px; }
.field label .req { color: #d9534f; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--border-strong); border-radius: 10px;
  font-family: inherit; font-size: 14.5px; color: var(--text-body);
  background: #fff; transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(29,78,137,.10);
}
.field textarea { resize: vertical; min-height: 120px; }
.form-msg { font-size: 14px; padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; display: none; }
.form-msg.ok { display: block; background: var(--c-accent-soft); color: #1c6b60; border: 1px solid #bfe6df; }
.form-msg.err { display: block; background: #fdecec; color: #b23b3b; border: 1px solid #f3c6c6; }

.map-placeholder {
  margin-top: 40px;
  background: var(--bg-soft);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
  height: 260px;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 8px;
  color: var(--text-muted); text-align: center;
}
.map-placeholder .mp-ic { color: var(--c-primary); }

/* ============ 滚动揭示 ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.show { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .cards, .features, .mission-grid { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .about-intro { grid-template-columns: 1fr; gap: 32px; }
  .svc-detail { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); gap: 28px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: stretch;
    position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    padding: 12px 24px; gap: 4px; box-shadow: var(--shadow-md);
  }
  .nav-links.open a { padding: 12px 14px; }
  .section { padding: 60px 0; }
  .hero { padding: 64px 0 72px; }
  .hero h1 { font-size: 32px; }
  .section-head h2 { font-size: 26px; }
  .page-hero h1 { font-size: 30px; }
  .cards, .features, .mission-grid, .process { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-brand { grid-column: auto; }
  .site-footer { padding: 44px 0 24px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; gap: 6px; }
  .brand .logo-mark { height: 36px; }
  .brand .brand-name { font-size: 16px; }
  .cta-band { padding: 40px 24px; }
  .cta-band h2 { font-size: 24px; }
}