/* ============================================
   外贸网站建设 - waimao.ningkailiang.com
   jianzhan.css — 高端响应式样式
   ============================================ */

:root {
  --primary: #1a56db;
  --primary-dark: #0e3a9e;
  --accent: #f59e0b;
  --dark: #0b1526;
  --dark-2: #101d33;
  --text: #1f2937;
  --muted: #6b7280;
  --light: #f7f9fc;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 12px 32px rgba(13, 38, 76, .12);
  --shadow-lg: 0 24px 60px rgba(13, 38, 76, .18);
}

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

html { scroll-behavior: smooth; }

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

img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }

.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 999;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e9f2;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 44px; height: 44px; border-radius: 10px; }
.logo strong { font-size: 20px; color: var(--dark); letter-spacing: 1px; }
.logo span { display: block; font-size: 12px; color: var(--muted); font-weight: 400; letter-spacing: 2px; }

.nav-links { display: flex; gap: 8px; list-style: none; }
.nav-links a {
  display: block; padding: 10px 18px; border-radius: 8px;
  color: var(--text); font-weight: 500;
}
.nav-links a:hover, .nav-links a.active { background: rgba(26, 86, 219, .08); color: var(--primary); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--dark); margin: 5px 0; border-radius: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 999px;
  font-size: 16px; font-weight: 600; cursor: pointer;
  border: 0; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 10px 24px rgba(26, 86, 219, .35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(26, 86, 219, .45); color: #fff; }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255, 255, 255, .6); }
.btn-outline:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-2px); color: var(--primary-dark); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 55%, #12305e 100%);
  color: #fff; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px;
  width: 460px; height: 460px; border-radius: 50%;
  background: radial-gradient(circle, rgba(26, 86, 219, .45), transparent 70%);
}
.hero-banner { position: relative; height: 260px; }
.hero-banner img { width: 100%; height: 100%; object-fit: cover; opacity: .35; }
.hero-inner { margin-top: -190px; padding: 110px 0 90px; position: relative; z-index: 2; }
.hero h1 { font-size: clamp(30px, 4.5vw, 50px); line-height: 1.25; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: #6ea8ff; }
.hero p.lead { font-size: clamp(15px, 2vw, 19px); color: #c3d1e8; max-width: 720px; margin-bottom: 34px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.hero-tags li {
  list-style: none; padding: 7px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .22);
  font-size: 14px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- 区块通用 ---------- */
.section { padding: 84px 0; }
.section.alt { background: var(--light); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.section-head .kicker {
  display: inline-block; color: var(--primary); font-weight: 700;
  letter-spacing: 3px; font-size: 13px; text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); color: var(--dark); margin-bottom: 14px; }
.section-head p { color: var(--muted); }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 28px; }
.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-radius: var(--radius); padding: 34px 28px;
  box-shadow: var(--shadow); transition: transform .25s, box-shadow .25s;
  border: 1px solid #eef1f7;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card .icon { font-size: 34px; margin-bottom: 14px; }
.card h3 { font-size: 20px; color: var(--dark); margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

.price-card { position: relative; overflow: hidden; }
.price-card .tag {
  position: absolute; top: 18px; right: -34px; transform: rotate(38deg);
  background: var(--accent); color: #fff; font-size: 12px; padding: 4px 40px;
}
.price-card .price { font-size: 34px; font-weight: 800; color: var(--primary); margin: 10px 0 4px; }
.price-card .price small { font-size: 14px; color: var(--muted); font-weight: 400; }
.price-card ul { list-style: none; margin-top: 16px; }
.price-card ul li { padding: 7px 0; color: var(--text); font-size: 15px; }
.price-card ul li::before { content: "✓ "; color: #16a34a; font-weight: 700; }

/* ---------- 图文板块 ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-bottom: 64px; }
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-media { order: 2; }
.feature-media img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; }
.feature-copy h3 { font-size: clamp(22px, 2.6vw, 30px); color: var(--dark); margin-bottom: 14px; }
.feature-copy p { color: var(--muted); margin-bottom: 14px; }
.feature-copy ul { list-style: none; margin-top: 8px; }
.feature-copy ul li { padding: 6px 0 6px 26px; position: relative; }
.feature-copy ul li::before { content: "◆"; position: absolute; left: 0; color: var(--primary); font-size: 13px; top: 9px; }

/* ---------- 对比表 ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); background: #fff; }
table.compare { width: 100%; border-collapse: collapse; min-width: 640px; }
table.compare th, table.compare td { padding: 16px 20px; text-align: left; border-bottom: 1px solid #edf0f6; }
table.compare thead th { background: var(--dark); color: #fff; font-size: 15px; }
table.compare tbody th { color: var(--dark); font-weight: 600; background: #f9fafc; }
table.compare td.good { color: #16a34a; font-weight: 600; }
table.compare td.bad { color: #dc2626; }

/* ---------- 流程 ---------- */
.steps { counter-reset: step; }
.step {
  position: relative; padding: 26px 24px 26px 76px; background: #fff;
  border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 18px;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 22px; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.step h3 { font-size: 18px; color: var(--dark); }
.step p { color: var(--muted); font-size: 15px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
details.faq-item {
  background: #fff; border-radius: 12px; box-shadow: var(--shadow);
  margin-bottom: 16px; border: 1px solid #eef1f7; overflow: hidden;
}
details.faq-item summary {
  cursor: pointer; padding: 20px 26px; font-weight: 600; color: var(--dark);
  list-style: none; position: relative; padding-right: 52px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  content: "+"; position: absolute; right: 24px; top: 50%; transform: translateY(-50%);
  font-size: 22px; color: var(--primary); transition: transform .2s;
}
details.faq-item[open] summary::after { content: "−"; }
details.faq-item .faq-body { padding: 0 26px 22px; color: var(--muted); }

/* ---------- 表单 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.form-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 40px; }
.form-card h3 { color: var(--dark); font-size: 24px; margin-bottom: 6px; }
.form-card .form-sub { color: var(--muted); margin-bottom: 26px; font-size: 15px; }
.field { margin-bottom: 20px; }
.field label { display: block; font-weight: 600; color: var(--dark); margin-bottom: 8px; font-size: 15px; }
.field label em { color: #dc2626; font-style: normal; margin-left: 4px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px; border: 1.5px solid #dfe5ef; border-radius: 10px;
  font-size: 15px; font-family: inherit; background: #fbfcfe; color: var(--text);
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(26, 86, 219, .12); background: #fff;
}
.field textarea { min-height: 140px; resize: vertical; }
/* 蜜罐字段：对正常用户隐藏 */
.hp-field { position: absolute !important; left: -9999px !important; top: -9999px !important; height: 0; overflow: hidden; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 4px; }
.form-msg {
  display: none; margin-top: 20px; padding: 16px 20px; border-radius: 10px;
  font-weight: 600; font-size: 15px;
}
.form-msg.success { display: block; background: #e8f7ee; color: #15803d; border: 1px solid #b6e6c9; }
.form-msg.error { display: block; background: #fdeaea; color: #b91c1c; border: 1px solid #f5c2c2; }
.contact-aside .card { margin-bottom: 20px; }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary));
  border-radius: 22px; color: #fff; text-align: center;
  padding: 60px 32px; box-shadow: var(--shadow-lg);
}
.cta-band h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom: 12px; }
.cta-band p { color: #d8e4ff; margin-bottom: 28px; max-width: 640px; margin-left: auto; margin-right: auto; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--dark); color: #a9b6cc; padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 10px; }
.site-footer a { color: #a9b6cc; }
.site-footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); padding-top: 22px; text-align: center; font-size: 14px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row { grid-template-columns: 1fr; gap: 26px; }
  .feature-row.reverse .feature-media { order: 0; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px;
    box-shadow: var(--shadow-lg); border-bottom: 1px solid #e5e9f2;
  }
  .nav-links.open { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .hero-inner { margin-top: -150px; padding: 80px 0 60px; }
  .hero-banner { height: 200px; }
  .section { padding: 60px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .form-card { padding: 26px 20px; }
  .btn { width: 100%; justify-content: center; }
  .hero-actions { flex-direction: column; }
}