/* ============================================================
   南京骁和科技发展有限公司 官网全局样式
   配色：深蓝 #1B3A6B（主）· 橙 #FF8C42（点缀）· 白/浅灰底
   ============================================================ */

:root {
  --blue-900: #14294B;
  --blue-800: #1B3A6B;
  --blue-700: #254982;
  --blue-600: #2D5AA0;
  --blue-100: #E8F0FA;
  --blue-50:  #F3F7FC;
  --orange:   #FF8C42;
  --orange-dark: #E6762E;
  --text:     #1F2937;
  --muted:    #5B6B82;
  --line:     #E3E9F2;
  --white:    #FFFFFF;
  --radius:   12px;
  --shadow:   0 4px 20px rgba(20, 41, 75, 0.07);
  --shadow-hover: 0 10px 32px rgba(20, 41, 75, 0.13);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
}

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

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand img { height: 44px; width: auto; }
.brand-name { font-size: 17px; font-weight: 700; color: var(--blue-800); line-height: 1.3; white-space: nowrap; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > li { position: relative; }
.main-nav a.nav-link {
  display: block; padding: 8px 16px; font-size: 15.5px; color: var(--text);
  border-radius: 8px; transition: background .2s, color .2s;
}
.main-nav a.nav-link:hover { background: var(--blue-50); color: var(--blue-800); }
.main-nav a.nav-link.active { color: var(--blue-800); font-weight: 600; }
.main-nav a.nav-link.active::after {
  content: ""; display: block; height: 3px; width: 24px;
  background: var(--orange); border-radius: 2px; margin: 4px auto 0;
}

/* 解决方案下拉 */
.dropdown-menu {
  display: none; position: absolute; top: 100%; left: 0;
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  min-width: 220px; padding: 8px; margin-top: 8px;
}
.main-nav li:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  display: block; padding: 10px 16px; font-size: 14.5px; border-radius: 8px; color: var(--text);
}
.dropdown-menu a:hover { background: var(--blue-50); color: var(--blue-800); }

.header-actions { display: flex; align-items: center; gap: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 10px; font-size: 15.5px; font-weight: 600;
  border: none; cursor: pointer; transition: all .2s; white-space: nowrap;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: var(--orange-dark); transform: translateY(-1px); }
.btn-blue { background: var(--blue-800); color: #fff; }
.btn-blue:hover { background: var(--blue-600); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--blue-800); border: 1.5px solid var(--blue-800); }
.btn-outline:hover { background: var(--blue-800); color: #fff; }
.btn-ghost { background: transparent; color: var(--blue-800); border: 1.5px solid var(--line); }
.btn-ghost:hover { border-color: var(--blue-800); }
.btn-lg { padding: 15px 36px; font-size: 17px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }

/* ---------- 首屏 ---------- */
.hero {
  background: linear-gradient(135deg, #EDF3FB 0%, #F8FAFD 55%, #FFF6EF 100%);
  padding: 88px 0 96px; overflow: hidden; position: relative;
}
.hero::before {
  content: ""; position: absolute; right: -80px; top: -80px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(255,140,66,0.10) 0%, transparent 65%);
  border-radius: 50%;
}
.hero-inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; position: relative; }
.hero h1 { font-size: 42px; line-height: 1.35; color: var(--blue-800); font-weight: 800; letter-spacing: .5px; }
.hero h1 .accent { color: var(--orange); }
.hero p.sub { margin: 20px 0 36px; font-size: 17.5px; color: var(--muted); max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-visual img { border-radius: 16px; box-shadow: var(--shadow-hover); }
.hero-tags { margin-top: 28px; display: flex; gap: 10px; flex-wrap: wrap; }
.hero-tags span {
  font-size: 13px; color: var(--blue-800); background: var(--white);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px;
}

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--blue-50); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-kicker {
  display: inline-block; font-size: 13.5px; font-weight: 700; letter-spacing: 2px;
  color: var(--orange); text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; color: var(--blue-800); font-weight: 800; }
.section-head p { margin-top: 14px; color: var(--muted); font-size: 16px; }
.section-note { text-align: center; margin-top: 44px; color: var(--blue-800); font-size: 16.5px; font-weight: 600; }

/* ---------- 问题卡片 ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; transition: box-shadow .25s, transform .25s; position: relative; overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--blue-800), var(--blue-600));
}
.card.accent-top::before { background: linear-gradient(90deg, var(--orange), #FFB37E); }
.card .num {
  font-size: 14px; font-weight: 800; color: var(--orange); letter-spacing: 2px; margin-bottom: 10px;
}
.card h3 { font-size: 19px; color: var(--blue-800); margin-bottom: 12px; font-weight: 700; }
.card p { font-size: 14.8px; color: var(--muted); }
.card ul.tick { margin-top: 14px; }
.card ul.tick li {
  position: relative; padding-left: 24px; font-size: 14.5px; color: var(--text); margin-bottom: 8px;
}
.card ul.tick li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 7px; height: 7px;
  border-radius: 50%; background: var(--orange);
}
.card .card-actions { margin-top: 18px; display: flex; gap: 12px; flex-wrap: wrap; }
.card .note { margin-top: 14px; font-size: 12.8px; color: #98A5B8; border-top: 1px dashed var(--line); padding-top: 12px; }

/* ---------- 产品模块 ---------- */
.product-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.product-showcase .visual img { border-radius: 16px; box-shadow: var(--shadow-hover); }
.img-note { font-size: 12.5px; color: #98A5B8; margin-top: 10px; text-align: center; }
.product-feature-group { margin-bottom: 40px; }
.product-feature-group .group-title {
  display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700;
  color: var(--blue-800); margin-bottom: 18px;
}
.product-feature-group .group-title .bar { width: 6px; height: 22px; background: var(--orange); border-radius: 3px; }
.chip-wrap { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  background: var(--white); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 18px; font-size: 14.5px; color: var(--text);
}
.chip b { color: var(--blue-800); }

/* 功能表 */
.feature-table { width: 100%; border-collapse: collapse; background: var(--white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.feature-table th {
  background: var(--blue-800); color: #fff; text-align: left; padding: 14px 20px; font-size: 15px;
}
.feature-table td { padding: 14px 20px; border-bottom: 1px solid var(--line); font-size: 14.5px; vertical-align: top; }
.feature-table tr:last-child td { border-bottom: none; }
.feature-table td:first-child { font-weight: 700; color: var(--blue-800); white-space: nowrap; }
.feature-table tr:nth-child(even) td { background: #FAFCFE; }

/* ---------- 小程序亮点 ---------- */
.mini-program {
  background: linear-gradient(120deg, var(--blue-800), var(--blue-600));
  border-radius: 20px; color: #fff; padding: 52px 56px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
.mini-program h3 { font-size: 26px; font-weight: 800; margin-bottom: 14px; }
.mini-program p { color: rgba(255,255,255,.85); font-size: 15.5px; }
.mini-program .points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.mini-program .points span {
  background: rgba(255,255,255,.12); border-radius: 10px; padding: 12px 16px; font-size: 14.5px;
}

/* ---------- 页面横幅（子页）---------- */
.page-banner {
  background: linear-gradient(135deg, var(--blue-800) 0%, var(--blue-600) 100%);
  color: #fff; padding: 64px 0; text-align: center;
}
.page-banner h1 { font-size: 34px; font-weight: 800; }
.page-banner p { margin-top: 12px; color: rgba(255,255,255,.85); font-size: 16.5px; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ---------- 服务路径 ---------- */
.path-flow { display: flex; flex-wrap: wrap; justify-content: center; gap: 0; align-items: stretch; }
.path-step {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px; width: 180px; text-align: center; position: relative; margin: 0 8px;
  box-shadow: var(--shadow);
}
.path-step .idx {
  width: 36px; height: 36px; border-radius: 50%; background: var(--blue-800); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; margin: 0 auto 12px;
}
.path-step p { font-size: 15px; font-weight: 600; color: var(--blue-800); }
.path-arrow { display: flex; align-items: center; color: var(--orange); font-size: 22px; font-weight: 800; }

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--blue-800), var(--blue-600));
  border-radius: 20px; padding: 52px; color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}
.cta-band h3 { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.cta-band p { color: rgba(255,255,255,.85); }
.cta-band .btn-primary { background: #fff; color: var(--blue-800); }
.cta-band .btn-primary:hover { background: var(--blue-50); }

/* ---------- 联系信息 ---------- */
.contact-list { display: grid; gap: 18px; }
.contact-list .item { display: flex; align-items: flex-start; gap: 14px; }
.contact-list .item .ico {
  width: 44px; height: 44px; border-radius: 10px; background: var(--blue-100);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-list .item .ico svg { width: 22px; height: 22px; }
.contact-list .item .label { font-size: 13px; color: #98A5B8; }
.contact-list .item .val { font-size: 16px; font-weight: 600; color: var(--blue-800); word-break: break-all; }

/* ---------- 表单 ---------- */
.form-card {
  background: var(--white); border: 1px solid var(--line); border-radius: 16px;
  padding: 44px; box-shadow: var(--shadow); max-width: 760px; margin: 0 auto;
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14.5px; font-weight: 600; color: var(--blue-800); }
.form-field label em { color: var(--orange); font-style: normal; margin-left: 2px; }
.form-field input, .form-field select, .form-field textarea {
  padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  font-size: 15px; font-family: inherit; transition: border-color .2s; background: #FBFCFE;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: none; border-color: var(--blue-600); background: #fff;
}
.form-field textarea { min-height: 110px; resize: vertical; }
.privacy-note {
  grid-column: 1 / -1; font-size: 13px; color: #98A5B8; background: var(--blue-50);
  border-radius: 10px; padding: 14px 16px; line-height: 1.6;
}
.form-submit { grid-column: 1 / -1; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-error { color: #D9482E; font-size: 13px; display: none; }
.form-field.invalid input, .form-field.invalid select { border-color: #D9482E; }
.form-field.invalid .form-error { display: block; }

/* ---------- 提示 Toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%) translateY(20px);
  background: var(--blue-900); color: #fff; padding: 14px 26px; border-radius: 12px;
  font-size: 15px; box-shadow: var(--shadow-hover); opacity: 0; pointer-events: none;
  transition: opacity .3s, transform .3s; z-index: 999; max-width: 86vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue-900); color: rgba(255,255,255,.82); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.site-footer .f-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.site-footer .f-brand img { height: 40px; }
.site-footer .f-brand span { color: #fff; font-weight: 700; font-size: 16px; }
.site-footer p, .site-footer li { font-size: 14px; line-height: 1.9; }
.site-footer a:hover { color: #fff; }
.site-footer .f-links li { margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,.55);
}
.footer-login {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25); color: #fff; border-radius: 10px; padding: 10px 20px; font-size: 14.5px;
}
.footer-login:hover { background: rgba(255,255,255,.2); }

/* ---------- 移动端 ---------- */
.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 24px; height: 2.5px; background: var(--blue-800); border-radius: 2px; transition: .3s; }

@media (max-width: 1024px) {
  .hero h1 { font-size: 34px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 12px 20px 20px; gap: 2px; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-hover); max-height: 80vh; overflow-y: auto;
  }
  .main-nav.open { display: flex; }
  .main-nav > li:hover .dropdown-menu { display: none; }
  .main-nav li.expand .dropdown-menu {
    display: block; position: static; box-shadow: none; border: none; padding: 0 0 0 24px; margin: 0; min-width: 0;
  }
  .header-actions .btn-ghost { display: none; }
  .header-actions .btn-primary { padding: 9px 16px; font-size: 14px; }

  .hero { padding: 56px 0 64px; }
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero p.sub { font-size: 16px; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
  .product-showcase { grid-template-columns: 1fr; }
  .mini-program { grid-template-columns: 1fr; padding: 36px 28px; }
  .mini-program .points { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-card { padding: 28px 22px; }
  .cta-band { padding: 36px 28px; }
  .path-flow { flex-direction: column; align-items: center; }
  .path-arrow { transform: rotate(90deg); margin: 4px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .feature-table { display: block; overflow-x: auto; }
}