/* 星屿宙网络技术服务工作室 — 站点样式 */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f8fc;
  --text: #171f2e;
  --text-soft: #5b667a;
  --text-mute: #8a94a6;
  --brand: #1e4d8f;
  --brand-dark: #163a6d;
  --brand-soft: #e9f1fa;
  --border: #e2e8f1;
  --ok: #1f7a4d;
  --radius: 10px;
  --maxw: 1100px;
  --shadow: 0 1px 3px rgba(23, 31, 46, .06), 0 8px 24px rgba(23, 31, 46, .05);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

img { max-width: 100%; }

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- 顶部导航 ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, .96);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(1.4) blur(8px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 66px;
  flex-wrap: wrap;
  padding: 8px 0;
}

.logo {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
  white-space: nowrap;
}
.logo:hover { text-decoration: none; }
.logo span { color: var(--brand); }

.nav-links {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  font-size: 15px;
}
.nav-links a { color: var(--text-soft); }
.nav-links a:hover { color: var(--brand); text-decoration: none; }
.nav-links a.active { color: var(--brand); font-weight: 600; }

/* ---------- 通用区块 ---------- */

section { padding: 64px 0; }
section.soft { background: var(--bg-soft); }

h1, h2, h3 { line-height: 1.35; margin: 0 0 16px; }
h1 { font-size: 34px; font-weight: 700; letter-spacing: -.3px; }
h2 { font-size: 26px; font-weight: 700; }
h3 { font-size: 18px; font-weight: 600; }

.lead { font-size: 17px; color: var(--text-soft); max-width: 720px; }

.section-head { margin-bottom: 36px; }
.section-head p { color: var(--text-soft); margin: 0; max-width: 720px; }

/* ---------- 首页 Hero ---------- */

.hero {
  padding: 84px 0 72px;
  background: linear-gradient(170deg, var(--brand-soft) 0%, #ffffff 68%);
  border-bottom: 1px solid var(--border);
}
.hero h1 { max-width: 800px; font-size: 38px; }
.hero .lead { margin: 0 0 30px; font-size: 18px; }

.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.tag {
  font-size: 13px;
  color: var(--brand-dark);
  background: #ffffff;
  border: 1px solid #cfe0f2;
  border-radius: 999px;
  padding: 5px 14px;
}

.btn {
  display: inline-block;
  padding: 11px 26px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-ghost { border-color: #c3d5ea; color: var(--brand-dark); background: #fff; margin-left: 10px; }
.btn-ghost:hover { border-color: var(--brand); text-decoration: none; }

/* ---------- 卡片网格 ---------- */

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 10px; }
.card p { color: var(--text-soft); margin: 0 0 12px; font-size: 15px; }
.card ul { margin: 0; padding-left: 20px; color: var(--text-soft); font-size: 15px; }
.card ul li { margin-bottom: 6px; }

/* ---------- 价格表 ---------- */

.price-group { margin-bottom: 52px; }
.price-group > h2 { margin-bottom: 6px; }
.price-group > .lead { margin: 0 0 26px; }

.price-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}
.price-card .name { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.price-card .price {
  font-size: 29px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: -.5px;
  margin-bottom: 4px;
}
.price-card .price small { font-size: 14px; font-weight: 500; color: var(--text-mute); margin-left: 2px; }
.price-card .cycle { font-size: 13px; color: var(--text-mute); margin-bottom: 18px; }
.price-card ul {
  margin: 0 0 4px;
  padding-left: 18px;
  font-size: 14.5px;
  color: var(--text-soft);
  flex: 1;
}
.price-card ul li { margin-bottom: 7px; }

.price-note {
  background: var(--brand-soft);
  border: 1px solid #d3e3f5;
  border-radius: var(--radius);
  padding: 20px 24px;
  font-size: 15px;
  color: var(--brand-dark);
}
.price-note strong { color: var(--brand-dark); }
.price-note p { margin: 0 0 8px; }
.price-note p:last-child { margin-bottom: 0; }

/* ---------- 流程步骤 ---------- */

.steps { counter-reset: step; display: grid; gap: 18px; }
.step {
  display: flex;
  gap: 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  box-shadow: var(--shadow);
}
.step-no {
  flex: 0 0 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}
.step-body h3 { margin-bottom: 6px; }
.step-body p { margin: 0; color: var(--text-soft); font-size: 15px; }

/* ---------- 信息表 ---------- */

.info-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.info-table th, .info-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.info-table th {
  width: 190px;
  color: var(--text-soft);
  font-weight: 500;
  background: var(--bg-soft);
}
.table-scroll { overflow-x: auto; }

/* ---------- 正文条款 ---------- */

.prose { max-width: 800px; }
.prose h2 { margin-top: 42px; font-size: 21px; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--text-soft); font-size: 15.5px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin-bottom: 8px; }

/* ---------- 待填占位 ---------- */

.todo {
  background: #fff4e5;
  border: 1px dashed #e0a355;
  border-radius: 6px;
  padding: 1px 8px;
  color: #a35d00;
  font-size: .95em;
  font-weight: 500;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background: #131a27;
  color: #a9b4c6;
  padding: 52px 0 32px;
  font-size: 14.5px;
  margin-top: 8px;
}
.site-footer h4 {
  color: #fff;
  font-size: 15px;
  margin: 0 0 14px;
  font-weight: 600;
}
.site-footer a { color: #a9b4c6; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid #26303f;
}
.footer-grid p { margin: 0 0 8px; line-height: 1.8; }
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  color: #77839a;
  font-size: 13.5px;
}
.footer-bottom p { margin: 0; }

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  section { padding: 46px 0; }
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 28px; }
  h1 { font-size: 27px; }
  h2 { font-size: 22px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .nav { min-height: 56px; }
  .nav-links { gap: 16px; font-size: 14.5px; }
  .info-table th { width: 120px; }
  .btn-ghost { margin-left: 0; margin-top: 10px; }
}