/* 子比比官网 前台样式 — 简约大气 */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --blue: #2f6bff;
  --blue-dark: #1f55d8;
  --ink: #1f2d3d;
  --ink-2: #5a6478;
  --ink-3: #98a1b3;
  --bg: #f7f9fc;
  --line: #e8edf5;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
}
.wrap { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

/* 顶部导航 */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { display: flex; align-items: center; height: 64px; }
.logo { display: flex; align-items: center; font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; margin-right: 10px; border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), #6a5cff); color: #fff; font-size: 16px;
}
.site-nav { margin-left: auto; display: flex; align-items: center; }
.site-nav a {
  padding: 8px 16px; font-size: 15px; color: var(--ink-2); border-radius: 8px;
  transition: color .2s, background .2s;
}
.site-nav a:hover { color: var(--blue); }
.site-nav a.on { color: var(--blue); font-weight: 600; }
.nav-member {
  margin-left: 10px; padding: 8px 18px !important;
  border: 1px solid var(--blue); color: var(--blue) !important; border-radius: 20px;
}
.nav-member:hover { background: var(--blue); color: #fff !important; }
.nav-toggle { display: none; margin-left: auto; border: none; background: none; font-size: 22px; color: var(--ink); cursor: pointer; }

/* Hero */
.hero {
  background: linear-gradient(160deg, #f4f7ff 0%, #eef3ff 45%, #ffffff 100%);
  padding: 110px 0 90px; text-align: center;
}
.hero-kicker { color: var(--blue); font-size: 14px; font-weight: 600; letter-spacing: 3px; margin-bottom: 18px; }
.hero h1 { font-size: 44px; line-height: 1.3; letter-spacing: 1px; margin-bottom: 20px; }
.hero p { max-width: 620px; margin: 0 auto 36px; color: var(--ink-2); font-size: 17px; }
.btn {
  display: inline-block; padding: 13px 34px; border-radius: 26px; font-size: 15px;
  background: var(--blue); color: #fff; transition: transform .15s, background .2s; cursor: pointer; border: none;
}
.btn:hover { background: var(--blue-dark); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--blue); border: 1px solid var(--blue); margin-left: 12px; }
.btn-ghost:hover { background: var(--blue); color: #fff; }

/* 通用区块 */
.section { padding: 84px 0; }
.section.alt { background: var(--bg); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head .en { color: var(--blue); font-size: 13px; font-weight: 600; letter-spacing: 3px; text-transform: uppercase; }
.sec-head h2 { font-size: 32px; margin: 10px 0 12px; letter-spacing: 1px; }
.sec-head p { color: var(--ink-2); max-width: 560px; margin: 0 auto; }

/* 服务卡片 */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.svc-card {
  background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 34px 30px;
  transition: box-shadow .25s, transform .25s;
}
.svc-card:hover { box-shadow: 0 14px 40px rgba(31,45,61,.09); transform: translateY(-4px); }
.svc-icon {
  width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: #eef3ff; font-size: 26px; margin-bottom: 20px;
}
.svc-card h3 { font-size: 18px; margin-bottom: 10px; }
.svc-card .sum { color: var(--ink-2); font-size: 14px; margin-bottom: 14px; }
.svc-card .detail { color: var(--ink-3); font-size: 13px; line-height: 1.8; }

/* 数字条 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat b { display: block; font-size: 38px; color: var(--blue); font-weight: 700; }
.stat span { color: var(--ink-2); font-size: 14px; }

/* 特性列表 */
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.feat { padding: 28px; border-radius: 14px; background: #fff; border: 1px solid var(--line); }
.feat b { display: block; font-size: 16px; margin-bottom: 8px; }
.feat p { color: var(--ink-2); font-size: 14px; }
.feat .no { color: var(--blue); font-weight: 700; font-size: 14px; letter-spacing: 2px; }

/* 关于我们 */
.about-hero { background: linear-gradient(160deg, #f4f7ff, #fff); padding: 80px 0; text-align: center; }
.about-hero h1 { font-size: 36px; margin-bottom: 14px; }
.about-hero p { color: var(--ink-2); max-width: 640px; margin: 0 auto; }
.about-body { max-width: 780px; margin: 0 auto; font-size: 16px; color: var(--ink-2); }
.about-body p { margin-bottom: 18px; }
.about-values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 60px; }
.value-card { text-align: center; padding: 36px 24px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.value-card .v-icon { font-size: 34px; margin-bottom: 14px; }
.value-card h3 { font-size: 17px; margin-bottom: 8px; }
.value-card p { color: var(--ink-2); font-size: 14px; }

/* 联系我们 */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: start; }
.contact-info .c-item { display: flex; align-items: flex-start; margin-bottom: 26px; }
.contact-info .c-icon {
  width: 46px; height: 46px; border-radius: 12px; background: #eef3ff; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 20px; margin-right: 16px;
}
.contact-info b { display: block; font-size: 15px; margin-bottom: 2px; }
.contact-info p { color: var(--ink-2); font-size: 14px; }
.form-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 36px; }
.form-card h3 { font-size: 18px; margin-bottom: 6px; }
.form-card .tip { color: var(--ink-3); font-size: 13px; margin-bottom: 22px; }
.form-row { margin-bottom: 18px; }
.form-row label { display: block; font-size: 13px; color: var(--ink-2); margin-bottom: 6px; }
.form-row input, .form-row textarea {
  width: 100%; padding: 11px 14px; border: 1px solid #dde3ee; border-radius: 8px;
  font-size: 14px; font-family: inherit; outline: none; transition: border .2s;
}
.form-row input:focus, .form-row textarea:focus { border-color: var(--blue); }
.form-row textarea { resize: vertical; min-height: 120px; }
.alert { border-radius: 8px; padding: 12px 16px; font-size: 14px; margin-bottom: 18px; }
.alert.ok { background: #eefaf3; color: #177a4a; }
.alert.err { background: #fdf0ef; color: #c03a31; }

/* 会员页 */
.member-wrap { max-width: 460px; margin: 70px auto 90px; }
.member-card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 38px 36px; }
.member-tabs { display: flex; margin-bottom: 28px; border-bottom: 1px solid var(--line); }
.member-tabs a { flex: 1; text-align: center; padding: 12px 0; color: var(--ink-2); font-size: 15px; border-bottom: 2px solid transparent; }
.member-tabs a.on { color: var(--blue); border-bottom-color: var(--blue); font-weight: 600; }
.center-wrap { max-width: 860px; margin: 60px auto 90px; }
.center-head { display: flex; align-items: center; gap: 22px; margin-bottom: 36px; }
.avatar { width: 76px; height: 76px; border-radius: 50%; background: #eef3ff; display: flex; align-items: center; justify-content: center; font-size: 32px; overflow: hidden; flex-shrink: 0; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.center-head h2 { font-size: 22px; margin-bottom: 4px; }
.center-head p { color: var(--ink-3); font-size: 13px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 28px 30px; margin-bottom: 26px; }
.panel h3 { font-size: 16px; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.msg-item { padding: 14px 0; border-bottom: 1px solid #f2f5fa; }
.msg-item:last-child { border-bottom: none; }
.msg-item .m-body { font-size: 14px; margin-bottom: 6px; }
.msg-item .m-meta { font-size: 12px; color: var(--ink-3); }
.tag { display: inline-block; font-size: 12px; padding: 1px 10px; border-radius: 10px; margin-left: 8px; }
.tag.new { background: #fff4e5; color: #c07a1a; }
.tag.done { background: #eefaf3; color: #177a4a; }
.empty { color: var(--ink-3); font-size: 14px; text-align: center; padding: 26px 0; }
.btn-sm { padding: 9px 22px; font-size: 14px; }
.link-btn { background: none; border: none; color: var(--ink-3); font-size: 13px; cursor: pointer; text-decoration: underline; }

/* CTA */
.cta { background: linear-gradient(120deg, var(--blue), #6a5cff); border-radius: 18px; padding: 60px 40px; text-align: center; color: #fff; }
.cta h2 { font-size: 28px; margin-bottom: 12px; }
.cta p { opacity: .85; margin-bottom: 28px; }
.cta .btn { background: #fff; color: var(--blue); }
.cta .btn:hover { background: #f0f3ff; }

/* 页脚 */
.site-footer { background: #141c2b; color: #b8c0d0; margin-top: 0; padding: 56px 0 0; }
.foot-grid { display: grid; grid-template-columns: 2fr 2fr 1fr; gap: 40px; padding-bottom: 40px; }
.foot-title { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 14px; }
.foot-desc { font-size: 13px; line-height: 1.9; }
.foot-col p { font-size: 13px; margin-bottom: 8px; }
.foot-col a:hover { color: #fff; }
.foot-bar { border-top: 1px solid #232f45; padding: 18px 0; text-align: center; font-size: 12px; color: #7a8499; }

/* 响应式 */
@media (max-width: 900px) {
  .svc-grid, .feat-grid, .about-values { grid-template-columns: 1fr 1fr; }
  .stats { grid-template-columns: 1fr 1fr; gap: 34px; }
  .contact-grid { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 26px; }
  .hero h1 { font-size: 32px; }
}
@media (max-width: 640px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch; padding: 10px 18px 18px;
    border-bottom: 1px solid var(--line); box-shadow: 0 12px 24px rgba(31,45,61,.08);
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 12px 10px; }
  .nav-member { margin: 8px 0 0; text-align: center; }
  .svc-grid, .feat-grid, .about-values { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .hero { padding: 76px 0 64px; }
}