/* ============================================================
   外贸综合服务官网 — 共享样式
   主色：深蓝 #0F4C81  辅助：浅灰  风格：商务稳重 B 端
   ============================================================ */

:root {
  --blue: #0F4C81;
  --blue-dark: #0A3A63;
  --blue-light: #1A6FB0;
  --blue-soft: #EAF1F8;
  --gray: #6B7785;
  --gray-light: #F4F6F8;
  --gray-border: #E2E7EC;
  --text: #1F2A36;
  --white: #FFFFFF;
  --radius: 10px;
  --shadow: 0 6px 22px rgba(15, 76, 129, 0.08);
  --shadow-hover: 0 12px 30px rgba(15, 76, 129, 0.16);
  --maxw: 1180px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 15px;
}

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

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all .2s ease;
  text-align: center;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline-dark { background: transparent; color: var(--blue); border-color: var(--blue); }
.btn-outline-dark:hover { background: var(--blue); color: #fff; }
.btn-block { display: block; width: 100%; }

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,.06);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--blue); }
.logo-mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}
.logo small { display: block; font-size: 11px; font-weight: 500; color: var(--gray); letter-spacing: 1px; }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-size: 15px; color: var(--text); font-weight: 500; position: relative; padding: 6px 0; }
.nav-links a:hover, .nav-links a.active { color: var(--blue); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 3px;
  background: var(--blue); border-radius: 2px;
}
.nav-cta { margin-left: 8px; }

/* 语言切换 */
.lang-switch {
  margin-left: 14px; font-size: 13px; font-weight: 600; color: var(--blue);
  border: 1px solid var(--blue); padding: 5px 12px; border-radius: 6px; white-space: nowrap;
}
.lang-switch:hover { background: var(--blue); color: #fff; }

/* 下拉菜单 */
.has-dropdown { position: relative; }
.has-dropdown > a::after { content: " ▾"; font-size: 11px; opacity: .7; }
.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 220px;
  background: #fff; border: 1px solid var(--gray-border); border-radius: 8px;
  box-shadow: 0 10px 26px rgba(0,0,0,.12); padding: 8px 0; display: none; z-index: 50;
}
.has-dropdown:hover .dropdown { display: block; }
.dropdown a {
  display: block; padding: 10px 18px; font-size: 14px; color: var(--text);
  border-bottom: 1px solid var(--gray-light); white-space: nowrap;
}
.dropdown a:last-child { border-bottom: none; }
.dropdown a:hover { background: var(--blue-soft); color: var(--blue); }

.mobile-toggle {
  display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px;
}
.mobile-toggle span { width: 24px; height: 2px; background: var(--blue); border-radius: 2px; }

/* ---------- 首屏 Hero ---------- */
.hero {
  background: radial-gradient(circle at 20% 20%, #155a96 0%, var(--blue) 45%, var(--blue-dark) 100%);
  color: #fff; padding: 86px 0 96px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -80px;
  width: 420px; height: 420px; border-radius: 50%;
  background: rgba(255,255,255,.05);
}
.hero-inner { position: relative; z-index: 2; max-width: 760px; }
.hero h1 { font-size: 42px; line-height: 1.25; font-weight: 800; margin-bottom: 18px; }
.hero p.sub { font-size: 18px; color: rgba(255,255,255,.85); margin-bottom: 32px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-tags { margin-top: 34px; display: flex; gap: 10px; flex-wrap: wrap; }
.hero-tags span {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  padding: 6px 14px; border-radius: 30px; font-size: 13px;
}

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section.alt { background: var(--gray-light); }
.section-title { text-align: center; margin-bottom: 14px; }
.section-title h2 { font-size: 30px; color: var(--blue); font-weight: 800; }
.section-title p { color: var(--gray); font-size: 16px; margin-top: 8px; }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }

/* ---------- 业务卡片 ---------- */
.service-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.service-card {
  background: #fff; border: 1px solid var(--gray-border); border-radius: var(--radius);
  padding: 28px 20px; text-align: center; transition: all .25s ease; box-shadow: var(--shadow);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--blue); }
.service-icon {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px;
  background: var(--blue-soft); color: var(--blue);
  display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.service-card h3 { font-size: 17px; margin-bottom: 10px; color: var(--text); }
.service-card p { font-size: 13px; color: var(--gray); line-height: 1.6; }
.service-card .more { display: inline-block; margin-top: 14px; color: var(--blue); font-weight: 600; font-size: 13px; }

/* ---------- 优势 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.adv-item {
  display: flex; gap: 18px; background: #fff; padding: 26px; border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--gray-border);
}
.adv-num {
  flex: 0 0 48px; width: 48px; height: 48px; border-radius: 12px;
  background: var(--blue); color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px;
}
.adv-item h4 { font-size: 17px; margin-bottom: 6px; }
.adv-item p { color: var(--gray); font-size: 14px; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--gray-border); box-shadow: var(--shadow); transition: all .25s ease;
}
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-thumb {
  height: 150px; background: linear-gradient(135deg, var(--blue), var(--blue-light));
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 40px;
}
.case-body { padding: 22px; }
.case-tag {
  display: inline-block; background: var(--blue-soft); color: var(--blue);
  font-size: 12px; padding: 3px 10px; border-radius: 20px; margin-bottom: 10px; font-weight: 600;
}
.case-body h4 { font-size: 16px; margin-bottom: 8px; }
.case-body p { font-size: 13px; color: var(--gray); }

/* 客户评价 */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 40px; }
.review {
  background: #fff; border-radius: var(--radius); padding: 24px; border: 1px solid var(--gray-border);
  box-shadow: var(--shadow);
}
.review .stars { color: #F4B400; font-size: 16px; margin-bottom: 10px; }
.review p { font-size: 14px; color: var(--text); font-style: italic; }
.review .who { margin-top: 14px; font-size: 13px; color: var(--gray); font-weight: 600; }

/* ---------- 底部咨询模块 ---------- */
.consult {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff; padding: 64px 0;
}
.consult .section-head h2, .consult .section-head p { color: #fff; }
.consult-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.consult-form { background: #fff; padding: 30px; border-radius: var(--radius); box-shadow: var(--shadow); }
.consult-form .field { margin-bottom: 16px; }
.consult-form label { display: block; font-size: 13px; color: var(--text); font-weight: 600; margin-bottom: 6px; }
.consult-form input, .consult-form textarea, .consult-form select {
  width: 100%; padding: 11px 13px; border: 1px solid var(--gray-border);
  border-radius: 6px; font-size: 14px; font-family: inherit; color: var(--text);
}
.consult-form input:focus, .consult-form textarea:focus, .consult-form select:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft);
}
.consult-form textarea { resize: vertical; min-height: 88px; }
.consult-info h3 { font-size: 22px; margin-bottom: 14px; }
.consult-info p { color: rgba(255,255,255,.85); margin-bottom: 10px; font-size: 15px; }
.consult-info .wechat {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
  padding: 10px 16px; border-radius: 8px; margin-top: 8px; font-weight: 600;
}
.form-note { font-size: 12px; color: var(--gray); margin-top: 8px; text-align: center; }
.form-success {
  display: none; background: #e8f7ee; color: #1f8a4c; border: 1px solid #b6e3c8;
  padding: 12px; border-radius: 6px; font-size: 14px; text-align: center; margin-bottom: 14px;
}

/* ---------- 页脚 ---------- */
.footer { background: #0c1f33; color: #c5d2de; padding: 50px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer a { color: #c5d2de; font-size: 14px; display: block; margin-bottom: 9px; }
.footer a:hover { color: #fff; }
.footer .about p { font-size: 13px; line-height: 1.8; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 34px; padding-top: 18px;
  text-align: center; font-size: 12px; color: #8da0b3;
}

/* ---------- 内页通用 Banner ---------- */
.page-hero {
  background: radial-gradient(circle at 30% 0%, #155a96, var(--blue) 55%, var(--blue-dark));
  color: #fff; padding: 60px 0;
}
.page-hero h1 { font-size: 34px; font-weight: 800; margin-bottom: 10px; }
.page-hero p { color: rgba(255,255,255,.85); font-size: 16px; }
.breadcrumb { font-size: 13px; color: rgba(255,255,255,.7); margin-bottom: 12px; }
.breadcrumb a:hover { color: #fff; }

/* ---------- 服务详情内容 ---------- */
.detail-grid { display: grid; grid-template-columns: 1fr 320px; gap: 44px; align-items: start; }
.detail-block { margin-bottom: 38px; }
.detail-block h3 {
  font-size: 20px; color: var(--blue); margin-bottom: 16px;
  padding-left: 12px; border-left: 4px solid var(--blue);
}
.detail-block ul.feat { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 24px; }
.detail-block ul.feat li {
  position: relative; padding-left: 24px; font-size: 14px; color: var(--text);
}
.detail-block ul.feat li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--blue); font-weight: 800;
}
.detail-block p { font-size: 14px; color: #445; margin-bottom: 10px; }

/* 侧边栏 */
.sidebar {
  background: var(--gray-light); border: 1px solid var(--gray-border);
  border-radius: var(--radius); padding: 26px; position: sticky; top: 88px;
}
.sidebar h4 { font-size: 16px; color: var(--blue); margin-bottom: 14px; }
.sidebar .meta { font-size: 14px; margin-bottom: 10px; color: var(--text); }
.sidebar .meta b { color: var(--gray); font-weight: 600; }
.sidebar .btn { margin-top: 16px; }

/* 痛点提示框 */
.note-box {
  background: #fff7ec; border: 1px solid #f3d9a4; border-radius: 8px;
  padding: 16px 18px; font-size: 14px; color: #7a5a1e; margin-bottom: 24px;
}
.note-box b { color: #9a6a14; }

/* ---------- 解决方案 ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sol-card {
  background: #fff; border: 1px solid var(--gray-border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow); transition: all .25s ease;
}
.sol-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.sol-icon {
  width: 52px; height: 52px; border-radius: 12px; background: var(--blue-soft);
  color: var(--blue); display: flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 16px;
}
.sol-card h3 { font-size: 18px; margin-bottom: 12px; }
.sol-card ul li { font-size: 14px; color: var(--gray); padding-left: 20px; position: relative; margin-bottom: 8px; }
.sol-card ul li::before { content: "›"; position: absolute; left: 0; color: var(--blue); font-weight: 800; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
.about-text h3 { font-size: 22px; color: var(--blue); margin-bottom: 16px; }
.about-text p { color: #445; margin-bottom: 14px; font-size: 15px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 36px; }
.stat { text-align: center; background: var(--gray-light); border-radius: var(--radius); padding: 22px 10px; }
.stat .num { font-size: 30px; font-weight: 800; color: var(--blue); }
.stat .lbl { font-size: 13px; color: var(--gray); margin-top: 4px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.contact-info h3 { font-size: 20px; margin-bottom: 18px; color: var(--blue); }
.contact-info .line { display: flex; gap: 12px; margin-bottom: 16px; font-size: 15px; }
.contact-info .line .ic {
  flex: 0 0 40px; height: 40px; border-radius: 10px; background: var(--blue-soft);
  color: var(--blue); display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.contact-info .line b { display: block; color: var(--gray); font-size: 13px; font-weight: 600; }
.check-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.check-grid label {
  display: flex; align-items: center; gap: 8px; font-size: 14px; cursor: pointer;
  background: var(--gray-light); padding: 10px 12px; border-radius: 6px; border: 1px solid var(--gray-border);
}
.check-grid input { width: auto; accent-color: var(--blue); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid, .review-grid, .sol-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .consult-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links {
    position: absolute; top: 68px; left: 0; right: 0; background: #fff;
    flex-direction: column; gap: 0; padding: 10px 20px; box-shadow: 0 8px 20px rgba(0,0,0,.1);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--gray-light); width: 100%; }
  .nav-cta { margin: 10px 0; }
  .dropdown { position: static; display: block; box-shadow: none; border: none; padding: 0 0 0 14px; }
  .dropdown a { border-bottom: none; padding: 8px 0; }
  .mobile-toggle { display: flex; }
  .hero h1 { font-size: 30px; }
  .hero p.sub { font-size: 16px; }
  .section { padding: 52px 0; }
  .detail-block ul.feat, .check-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}