/* 伴航创业 banhangcy.com 全站样式
   深蓝 + 白 + 橙色点缀，专业财税风格，响应式 */
:root {
  --primary: #1a4b8c;
  --primary-dark: #123662;
  --primary-light: #e8f0fa;
  --accent: #e8801c;
  --accent-dark: #c96a0e;
  --text: #2b3440;
  --text-light: #5f6b7a;
  --bg: #ffffff;
  --bg-gray: #f5f7fa;
  --border: #e2e8f0;
  --success: #1d9e75;
  --radius: 10px;
  --shadow: 0 2px 12px rgba(26, 75, 140, 0.08);
  --shadow-lg: 0 8px 30px rgba(26, 75, 140, 0.12);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }
ul, ol { padding-left: 1.4em; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部栏 ===== */
.topbar {
  background: var(--primary-dark);
  color: #cfe0f5;
  font-size: 13px;
  padding: 6px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar a { color: #cfe0f5; }
.topbar .phone { color: #fff; font-weight: 600; }

/* ===== 导航 ===== */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 12px 20px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
}
.logo-text { line-height: 1.2; }
.logo-text .cn { font-size: 18px; font-weight: 700; color: var(--primary-dark); }
.logo-text .en { font-size: 11px; color: var(--text-light); letter-spacing: 1px; }

.nav { display: flex; list-style: none; gap: 28px; align-items: center; padding: 0; }
.nav a { color: var(--text); font-size: 15px; font-weight: 500; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a.active { color: var(--primary); border-bottom-color: var(--accent); }
.nav-cta { background: var(--accent); color: #fff !important; padding: 8px 18px !important; border-radius: 6px; border-bottom: none !important; font-weight: 600; }
.nav-cta:hover { background: var(--accent-dark); }

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

/* ===== Hero ===== */
.hero { background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #2a67b5 100%); color: #fff; padding: 70px 0 90px; position: relative; overflow: hidden; }
.hero h1 { font-size: 40px; line-height: 1.3; margin-bottom: 16px; font-weight: 700; }
.hero .sub { font-size: 18px; color: #d8e6f8; max-width: 720px; margin-bottom: 24px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: 16px; transition: all .2s; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-outline { border: 2px solid rgba(255,255,255,.7); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.1); color: #fff; }
.hero-trust { display: flex; gap: 40px; margin-top: 40px; flex-wrap: wrap; }
.hero-trust .item b { display: block; font-size: 24px; color: #ffd9a8; }
.hero-trust .item span { font-size: 13px; color: #b9cde8; }

/* ===== 区块通用 ===== */
.section { padding: 64px 0; }
.section-gray { background: var(--bg-gray); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 28px; color: var(--primary-dark); margin-bottom: 10px; }
.section-head p { color: var(--text-light); font-size: 15px; }

/* ===== 信任点 ===== */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trust-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: all .2s; }
.trust-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.trust-card .icon { font-size: 26px; margin-bottom: 10px; }
.trust-card h3 { font-size: 17px; color: var(--primary-dark); margin-bottom: 8px; }
.trust-card p { font-size: 14px; color: var(--text-light); }

/* ===== 服务卡片 ===== */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 24px; transition: all .2s; display: flex; flex-direction: column;
}
.service-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); border-color: var(--primary); }
.service-card .num { color: var(--accent); font-weight: 700; font-size: 14px; }
.service-card h3 { font-size: 19px; color: var(--primary-dark); margin: 8px 0 10px; }
.service-card p { font-size: 14px; color: var(--text-light); flex: 1; }
.service-card .more { margin-top: 14px; color: var(--primary); font-weight: 600; font-size: 14px; }

/* ===== 流程 ===== */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; position: relative; }
.step .step-no {
  width: 34px; height: 34px; border-radius: 50%; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; margin-bottom: 10px;
}
.step h4 { font-size: 16px; color: var(--primary-dark); margin-bottom: 6px; }
.step p { font-size: 13px; color: var(--text-light); }

/* ===== 案例 ===== */
.case-list { display: grid; gap: 16px; }
.case-item { background: #fff; border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; padding: 18px 22px; }
.case-item h4 { color: var(--primary-dark); font-size: 16px; margin-bottom: 6px; }
.case-item p { font-size: 14px; color: var(--text-light); }

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 10px; overflow: hidden; }
.faq-item summary { padding: 16px 20px; cursor: pointer; font-weight: 600; color: var(--text); list-style: none; position: relative; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 20px; color: var(--accent); font-size: 20px; }
.faq-item[open] summary::after { content: "–"; }
.faq-item .faq-body { padding: 0 20px 16px; font-size: 14px; color: var(--text-light); }

/* ===== 转化区 ===== */
.cta-band { background: var(--primary); color: #fff; padding: 50px 0; text-align: center; }
.cta-band h2 { font-size: 26px; margin-bottom: 12px; }
.cta-band p { color: #cfe0f5; margin-bottom: 24px; }
.cta-channels { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; margin-top: 10px; }
.cta-channel { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25); border-radius: 10px; padding: 16px 26px; }
.cta-channel b { display: block; font-size: 17px; margin-bottom: 4px; }
.cta-channel span { font-size: 13px; color: #cfe0f5; }
a.cta-channel { display: block; text-decoration: none; color: #fff; transition: background .2s, border-color .2s; }
a.cta-channel:hover { background: rgba(255,255,255,.2); border-color: rgba(255,255,255,.5); color: #fff; }
a.cta-channel b { color: #fff; }
a.cta-channel:focus-visible, .btn:focus-visible, .nav a:focus-visible, .form-card input:focus-visible, .form-card textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ===== 页脚 ===== */
.site-footer { background: var(--primary-dark); color: #b9cde8; padding: 44px 0 20px; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
.footer-grid h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-grid ul { list-style: none; padding: 0; }
.footer-grid li { margin-bottom: 8px; }
.footer-grid a { color: #b9cde8; }
.footer-grid a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.15); padding-top: 16px; font-size: 12px; line-height: 2; text-align: center; color: #7e97b8; }
.footer-bottom a { color: #9db6d6; }
.footer-bottom a:hover { color: #fff; }

/* ===== 内页通用 ===== */
.page-hero { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); color: #fff; padding: 48px 0; }
.page-hero h1 { font-size: 32px; margin-bottom: 8px; }
.page-hero .crumb { font-size: 13px; color: #b9cde8; }
.page-hero .crumb a { color: #d8e6f8; }
.page-body { padding: 50px 0 60px; }
.page-body h2 { color: var(--primary-dark); font-size: 22px; margin: 30px 0 14px; }
.page-body h3 { color: var(--primary-dark); font-size: 18px; margin: 22px 0 10px; }
.page-body p { margin-bottom: 14px; }
.page-body ul, .page-body ol { margin-bottom: 16px; }
.lead { font-size: 17px; color: var(--primary); font-weight: 600; background: var(--primary-light); border-left: 4px solid var(--primary); padding: 14px 18px; border-radius: 0 8px 8px 0; margin-bottom: 20px; }

/* ===== 表格 ===== */
.tbl { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 14px; }
.tbl th, .tbl td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.tbl th { background: var(--primary-light); color: var(--primary-dark); font-weight: 600; }

/* ===== 表单 ===== */
.form-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); max-width: 560px; }
.form-card label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; }
.form-card input, .form-card textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; font-family: var(--font);
}
.form-card input:focus, .form-card textarea:focus { outline: none; border-color: var(--primary); }
.form-card .btn { margin-top: 18px; border: none; cursor: pointer; width: 100%; }
.form-card .btn:disabled { opacity: .6; cursor: not-allowed; }
.hp-field { position: absolute; left: -9999px; width: 1px; height: 1px; }
.agree-line { display: flex !important; align-items: flex-start; gap: 8px; font-size: 13px !important; font-weight: 400 !important; color: var(--text-light); line-height: 1.6; margin-top: 16px !important; }
.agree-line input { width: auto !important; margin-top: 3px; flex: none; }
.agree-line a { color: var(--primary); }
.form-tip { margin-top: 12px; font-size: 13px; min-height: 18px; }
.form-tip.ok { color: #137a3f; }
.form-tip.err { color: #c0392b; }

/* ===== 联系信息 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.contact-info .item { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-info .icon { font-size: 22px; }
.contact-info b { display: block; color: var(--primary-dark); }
.contact-info span { color: var(--text-light); font-size: 14px; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .trust-grid, .service-grid, .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
}
@media (max-width: 640px) {
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; box-shadow: var(--shadow-lg); gap: 14px; }
  .nav.open { display: flex; }
  .nav-toggle { display: block; }
  .trust-grid, .service-grid, .steps { grid-template-columns: 1fr; }
  .hero { padding: 50px 0 60px; }
  .hero h1 { font-size: 25px; }
  .hero-trust { gap: 20px; }
  .section { padding: 44px 0; }
  .section-head h2 { font-size: 22px; }
  .topbar .container { justify-content: center; }
  .topbar .slogan { display: none; }
  .site-footer { padding: 36px 0 28px; }
  .footer-bottom { font-size: 11px; line-height: 2.1; }
}