/* 环洋国际模板站 · 深蓝商务风 */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #1a2b4a;
  line-height: 1.6;
  background: #fff;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* ====== 色板 ====== */
:root {
  --navy: #0a1f3d;
  --navy-mid: #1a2b4a;
  --navy-light: #2d4a7a;
  --blue: #185fa5;
  --blue-light: #e6f1fb;
  --gold: #c8a35a;
  --text: #1a2b4a;
  --text-2: #5a6b85;
  --text-3: #8895ad;
  --border: #e1e6ef;
  --bg-soft: #f6f8fc;
  --shadow: 0 4px 20px rgba(10, 31, 61, 0.08);
  --shadow-lg: 0 10px 40px rgba(10, 31, 61, 0.12);
  --radius: 6px;
  --radius-lg: 10px;
}

/* ====== 通用容器 ====== */
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ====== Header / Nav ====== */
.header {
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-brand { display: flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: var(--navy); }
.nav-brand .logo-mark {
  width: 36px; height: 36px;
  background: var(--navy);
  color: var(--gold);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700;
  letter-spacing: -1px;
}
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  font-size: 14px;
  color: var(--text-2);
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--navy); font-weight: 600; }
.nav-cta {
  background: var(--navy);
  color: #fff !important;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.nav-cta:hover { background: var(--navy-light); transform: translateY(-1px); }
.nav-toggle { display: none; }

/* ====== Hero ====== */
.hero {
  background: linear-gradient(135deg, #0a1f3d 0%, #1a2b4a 60%, #2d4a7a 100%);
  color: #fff;
  padding: 100px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(200, 163, 90, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(24, 95, 165, 0.15) 0%, transparent 50%);
  pointer-events: none;
}
.hero-eyebrow {
  display: inline-block;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 2px;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: 48px;
  line-height: 1.2;
  font-weight: 700;
  margin-bottom: 20px;
  max-width: 720px;
}
.hero h1 .accent { color: var(--gold); }
.hero-lead {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 32px;
}
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  border: 1px solid transparent;
}
.btn-primary { background: var(--gold); color: #fff; }
.btn-primary:hover { background: #b89148; transform: translateY(-2px); }
.btn-ghost { color: #fff; border-color: rgba(255, 255, 255, 0.3); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.08); border-color: #fff; }
.btn-outline { background: transparent; color: var(--navy); border-color: var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn-danger { background: #c0392b; color: #fff; }
.btn-danger:hover { background: #a33024; }

/* ====== Section 通用 ====== */
section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .kicker { color: var(--blue); font-size: 13px; letter-spacing: 2px; text-transform: uppercase; font-weight: 600; }
.section-head h2 { font-size: 36px; color: var(--navy); margin: 12px 0 16px; font-weight: 700; }
.section-head p { color: var(--text-2); font-size: 16px; max-width: 640px; margin: 0 auto; }

/* ====== 数据条 (Stats) ====== */
.stats {
  background: var(--navy);
  color: #fff;
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-num { font-size: 40px; font-weight: 700; color: var(--gold); line-height: 1.2; }
.stat-label { font-size: 14px; color: rgba(255, 255, 255, 0.8); margin-top: 4px; }

/* ====== 卖点卡片 ====== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.25s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--blue); }
.feature-icon {
  width: 56px; height: 56px;
  background: var(--blue-light);
  color: var(--blue);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 700;
  margin: 0 auto 16px;
}
.feature-card h3 { font-size: 17px; color: var(--navy); margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-2); }

/* ====== 航线卡片 ====== */
.routes { background: var(--bg-soft); }
.routes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.route-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all 0.25s;
}
.route-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.route-flow { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--navy); font-size: 16px; }
.route-flow .arrow { color: var(--gold); font-size: 18px; }
.route-meta { display: flex; gap: 12px; font-size: 13px; color: var(--text-2); }
.route-meta span { background: var(--bg-soft); padding: 4px 10px; border-radius: 12px; }
.route-link { margin-top: auto; color: var(--blue); font-size: 13px; font-weight: 600; }

/* ====== 评价 ====== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.testimonial::before {
  content: "“";
  position: absolute;
  top: 10px; left: 20px;
  font-size: 60px;
  color: var(--blue-light);
  font-family: serif;
  line-height: 1;
}
.testimonial-text { color: var(--text); margin: 16px 0 16px; line-height: 1.7; font-size: 14px; }
.testimonial-author { font-size: 13px; color: var(--text-2); }
.testimonial-author strong { color: var(--navy); display: block; margin-bottom: 2px; }

/* ====== FAQ ====== */
.faq { background: var(--bg-soft); }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.faq-q { padding: 18px 24px; font-weight: 600; color: var(--navy); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-q::after { content: "+"; color: var(--blue); font-size: 22px; font-weight: 300; }
.faq-item.open .faq-q::after { content: "−"; }
.faq-a { padding: 0 24px 18px; color: var(--text-2); display: none; line-height: 1.7; }
.faq-item.open .faq-a { display: block; }

/* ====== CTA 区块 ====== */
.cta {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: #fff;
  text-align: center;
  padding: 72px 0;
}
.cta h2 { font-size: 32px; margin-bottom: 12px; }
.cta p { color: rgba(255, 255, 255, 0.8); margin-bottom: 32px; font-size: 16px; }

/* ====== Footer ====== */
.footer {
  background: #061530;
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer h4 { color: #fff; margin-bottom: 16px; font-size: 15px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a:hover { color: #fff; }
.footer-brand p { margin-top: 12px; line-height: 1.7; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}
.footer-demo-tag {
  display: inline-block;
  background: rgba(200, 163, 90, 0.15);
  color: var(--gold);
  padding: 2px 10px;
  border-radius: 10px;
  font-size: 11px;
  margin-left: 8px;
  letter-spacing: 0.5px;
}

/* ====== 内页通用 ====== */
.page-hero {
  background: var(--navy);
  color: #fff;
  padding: 72px 0 56px;
  text-align: center;
}
.page-hero h1 { font-size: 40px; margin-bottom: 12px; }
.page-hero p { color: rgba(255, 255, 255, 0.8); font-size: 16px; max-width: 640px; margin: 0 auto; }

/* ====== 服务页 ====== */
.services-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.service-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: all 0.25s;
}
.service-block:hover { box-shadow: var(--shadow); border-color: var(--blue); }
.service-num { font-size: 28px; font-weight: 700; color: var(--gold); line-height: 1; min-width: 40px; }
.service-content h3 { font-size: 19px; color: var(--navy); margin-bottom: 8px; }
.service-content p { color: var(--text-2); font-size: 14px; margin-bottom: 12px; }
.service-suitable { font-size: 13px; color: var(--text-3); }
.service-suitable strong { color: var(--navy); font-weight: 600; }

/* ====== 关于页 ====== */
.about-content { max-width: 760px; margin: 0 auto; }
.about-content h2 { color: var(--navy); font-size: 26px; margin: 36px 0 12px; }
.about-content p { color: var(--text); line-height: 1.85; margin-bottom: 16px; }
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 40px 0; }
.about-stat { background: var(--bg-soft); padding: 24px; border-radius: var(--radius-lg); text-align: center; }
.about-stat .n { font-size: 32px; color: var(--blue); font-weight: 700; }
.about-stat .l { font-size: 13px; color: var(--text-2); margin-top: 4px; }

/* ====== 联系页 ====== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-info-card { background: var(--bg-soft); padding: 32px; border-radius: var(--radius-lg); }
.contact-info-card h3 { color: var(--navy); margin-bottom: 20px; }
.contact-row { display: flex; gap: 12px; margin-bottom: 18px; align-items: flex-start; }
.contact-row .ico { width: 36px; height: 36px; background: var(--blue); color: #fff; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 14px; font-weight: 700; }
.contact-row strong { display: block; color: var(--navy); font-size: 14px; margin-bottom: 2px; }
.contact-row span { color: var(--text-2); font-size: 14px; }
.contact-form { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; }
.contact-form h3 { color: var(--navy); margin-bottom: 20px; }
.form-row { margin-bottom: 16px; }
.form-row label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; font-weight: 500; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border 0.2s;
  background: #fff;
  color: var(--text);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus { outline: none; border-color: var(--blue); }
.form-row textarea { resize: vertical; min-height: 80px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-submit { background: var(--navy); color: #fff; padding: 12px 24px; border-radius: var(--radius); font-size: 14px; font-weight: 600; width: 100%; transition: all 0.2s; }
.form-submit:hover { background: var(--navy-light); }
.form-submit:disabled { opacity: 0.5; cursor: not-allowed; }
.form-success { background: #e8f7ee; color: #1a7a3a; padding: 12px 16px; border-radius: var(--radius); font-size: 14px; margin-top: 12px; display: none; }

/* ====== 新闻页 ====== */
.news-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 20px; }
.news-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px 28px; transition: all 0.2s; }
.news-item:hover { box-shadow: var(--shadow); border-color: var(--blue); }
.news-meta { display: flex; gap: 12px; font-size: 12px; color: var(--text-3); margin-bottom: 10px; }
.news-meta .tag { background: var(--blue-light); color: var(--blue); padding: 2px 10px; border-radius: 10px; font-weight: 500; }
.news-item h3 { color: var(--navy); font-size: 18px; margin-bottom: 8px; }
.news-item p { color: var(--text-2); font-size: 14px; line-height: 1.7; }

/* ====== 客服弹窗 ====== */
.chat-launcher {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 100;
  background: var(--navy);
  color: #fff;
  border-radius: 50px;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 28px rgba(10, 31, 61, 0.3);
  cursor: pointer;
  transition: all 0.25s;
}
.chat-launcher:hover { background: var(--navy-light); transform: translateY(-2px); }
.chat-launcher .pulse {
  width: 10px; height: 10px;
  background: #2ecc71;
  border-radius: 50%;
  position: relative;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.6); }
  70% { box-shadow: 0 0 0 8px rgba(46, 204, 113, 0); }
  100% { box-shadow: 0 0 0 0 rgba(46, 204, 113, 0); }
}
.chat-modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 31, 61, 0.6);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.chat-modal.open { display: flex; }
.chat-box {
  background: #fff;
  border-radius: var(--radius-lg);
  max-width: 380px;
  width: 100%;
  padding: 32px 28px;
  position: relative;
  text-align: center;
  animation: slideUp 0.25s;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.chat-close {
  position: absolute;
  top: 12px; right: 16px;
  background: none;
  font-size: 24px;
  color: var(--text-3);
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
}
.chat-box h4 { color: var(--navy); font-size: 18px; margin-bottom: 6px; }
.chat-box .sub { color: var(--text-2); font-size: 13px; margin-bottom: 20px; }
.chat-qr {
  width: 220px; height: 220px;
  margin: 0 auto 16px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  padding: 8px;
}
.chat-qr img { width: 100%; height: 100%; object-fit: contain; }
.chat-tel { color: var(--blue); font-weight: 700; font-size: 18px; margin-bottom: 8px; }
.chat-tip { color: var(--text-3); font-size: 12px; }

/* ====== 后台样式 ====== */
body.admin { background: #f0f3f8; }
.admin-login {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  padding: 24px;
}
.admin-login-box {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  width: 100%; max-width: 380px;
  box-shadow: var(--shadow-lg);
}
.admin-login-box h1 { color: var(--navy); font-size: 22px; margin-bottom: 6px; }
.admin-login-box p { color: var(--text-2); font-size: 13px; margin-bottom: 24px; }
.admin-login-box .form-row { margin-bottom: 16px; }
.admin-login-box .form-submit { margin-top: 8px; }
.admin-login-box .error { color: #c0392b; font-size: 13px; margin-top: 8px; display: none; }
.admin-login-box .demo-hint { background: #fff8e1; color: #8a6d3b; font-size: 12px; padding: 10px 14px; border-radius: var(--radius); margin-top: 14px; }

.admin-shell { display: flex; min-height: 100vh; }
.admin-sidebar {
  width: 220px;
  background: var(--navy);
  color: #fff;
  flex-shrink: 0;
  display: flex; flex-direction: column;
}
.admin-sidebar .brand { padding: 24px 20px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); font-weight: 700; }
.admin-sidebar .brand small { display: block; font-size: 11px; color: var(--gold); font-weight: 400; margin-top: 2px; letter-spacing: 1px; }
.admin-nav { list-style: none; flex: 1; padding: 12px 0; }
.admin-nav li a {
  display: block; padding: 12px 20px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}
.admin-nav li a:hover, .admin-nav li a.active { background: rgba(255, 255, 255, 0.05); color: #fff; border-left-color: var(--gold); }
.admin-nav li a .badge { background: #e74c3c; color: #fff; font-size: 11px; padding: 1px 8px; border-radius: 10px; margin-left: 6px; }
.admin-sidebar .foot { padding: 16px 20px; border-top: 1px solid rgba(255, 255, 255, 0.08); font-size: 12px; }
.admin-sidebar .foot button { color: rgba(255, 255, 255, 0.6); font-size: 12px; }
.admin-main { flex: 1; padding: 28px 32px; overflow-x: auto; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.admin-header h1 { color: var(--navy); font-size: 22px; }
.admin-header .meta { color: var(--text-2); font-size: 13px; }
.admin-card { background: #fff; border-radius: var(--radius-lg); padding: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.04); margin-bottom: 20px; }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 16px; margin-bottom: 24px; }
.admin-stat { background: #fff; padding: 20px; border-radius: var(--radius-lg); box-shadow: 0 1px 3px rgba(0,0,0,0.04); }
.admin-stat .n { font-size: 28px; font-weight: 700; color: var(--blue); }
.admin-stat .l { color: var(--text-2); font-size: 13px; margin-top: 4px; }
.admin-stat.warn .n { color: #e67e22; }
.admin-stat.success .n { color: #27ae60; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.admin-table th, .admin-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.admin-table th { background: var(--bg-soft); color: var(--text-2); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
.admin-table tr:hover td { background: #fafbfd; }
.admin-table .status { display: inline-block; padding: 2px 10px; border-radius: 10px; font-size: 12px; font-weight: 500; }
.status-new { background: #fff4e5; color: #e67e22; }
.status-contacted { background: #e6f1fb; color: #185fa5; }
.status-won { background: #e8f7ee; color: #27ae60; }
.status-lost { background: #f5e6e6; color: #c0392b; }
.admin-empty { text-align: center; padding: 40px; color: var(--text-3); }
.admin-toolbar { display: flex; gap: 12px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }
.admin-toolbar .grow { flex: 1; }
.admin-toolbar input, .admin-toolbar select { padding: 8px 12px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 13px; }
.admin-modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: none; align-items: center; justify-content: center; z-index: 300; padding: 24px;
}
.admin-modal.open { display: flex; }
.admin-modal-box {
  background: #fff; border-radius: var(--radius-lg);
  max-width: 560px; width: 100%; max-height: 88vh; overflow-y: auto;
  padding: 28px;
}
.admin-modal-box h2 { color: var(--navy); margin-bottom: 18px; font-size: 18px; }
.admin-modal-box textarea { min-height: 120px; }
.admin-modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 18px; }

.toast { position: fixed; top: 24px; right: 24px; background: var(--navy); color: #fff; padding: 12px 20px; border-radius: var(--radius); box-shadow: var(--shadow-lg); z-index: 400; font-size: 14px; display: none; }
.toast.show { display: block; animation: slideUp 0.2s; }
.toast.error { background: #c0392b; }
.toast.success { background: #27ae60; }

.view { display: none; }
.view.active { display: block; }

/* ====== 移动端汉堡菜单 ====== */
.nav-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; font-size: 22px; color: var(--navy); border-radius: var(--radius); }
.nav-toggle:hover { background: var(--bg-soft); }
.mobile-menu { display: none; border-top: 1px solid var(--border); background: #fff; padding: 8px 0 16px; }
.mobile-menu ul { list-style: none; }
.mobile-menu li a { display: block; padding: 13px 24px; font-size: 15px; color: var(--text); font-weight: 500; border-left: 3px solid transparent; }
.mobile-menu li a:hover, .mobile-menu li a.active { border-left-color: var(--gold); background: var(--bg-soft); color: var(--navy); }
.mobile-menu .mm-cta { margin: 12px 24px 0; background: var(--navy); color: #fff; text-align: center; padding: 12px; border-radius: var(--radius); font-weight: 600; font-size: 14px; display: block; }
@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .mobile-menu.open { display: block; }
}

/* ====== 响应式 ====== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; width: 40px; height: 40px; background: none; align-items: center; justify-content: center; font-size: 22px; color: var(--navy); }
  .hero h1 { font-size: 32px; }
  .hero { padding: 60px 0 50px; }
  section { padding: 56px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .routes-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .services-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .form-grid { grid-template-columns: 1fr; }
  .admin-sidebar { width: 60px; }
  .admin-sidebar .brand, .admin-nav li a span, .admin-sidebar .foot { display: none; }
  .admin-nav li a { text-align: center; padding: 12px 0; }
  .admin-stats { grid-template-columns: repeat(2, 1fr); }
  .admin-main { padding: 20px 16px; }
}
@media (max-width: 540px) {
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 28px; }
  .section-head h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; }
  .chat-launcher { padding: 12px 16px; font-size: 13px; }
  .chat-launcher .label { display: none; }
}