/* ============================================================
   国际物流自建站 — 全局样式
   品牌色：深海军蓝 + 天空蓝 + 橙色 CTA
   ============================================================ */

:root {
  --navy-900: #0A2238;
  --navy-800: #0F2E4C;
  --navy-700: #16406B;
  --blue-600: #1E6FEB;
  --blue-500: #2E8BEF;
  --blue-100: #E8F1FE;
  --orange-500: #FF7A1A;
  --orange-100: #FFF1E6;
  --bg: #FFFFFF;
  --bg-alt: #F4F8FC;
  --text: #16293B;
  --muted: #5B6B7C;
  --border: #E3EAF3;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(10, 34, 56, .08);
  --shadow-lg: 0 18px 44px rgba(10, 34, 56, .14);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { vertical-align: middle; }
a { color: inherit; }
button { font-family: inherit; }
h1, h2, h3, h4, p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: rgba(46, 139, 239, .25); }

:focus-visible {
  outline: 3px solid rgba(46, 139, 239, .5);
  outline-offset: 2px;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.section { padding: 92px 0; }
.section-alt { background: var(--bg-alt); }

/* ---------- 通用组件 ---------- */
.ic { width: 24px; height: 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: 0;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}

.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-block { width: 100%; }

.btn-primary {
  background: var(--orange-500);
  color: #fff;
  box-shadow: 0 8px 20px rgba(255, 122, 26, .35);
}
.btn-primary:hover { background: #ED6B0E; transform: translateY(-2px); }

.btn-ghost {
  border: 1.5px solid rgba(255, 255, 255, .45);
  color: #fff;
  background: transparent;
}
.btn-ghost:hover { background: rgba(255, 255, 255, .1); transform: translateY(-2px); }

.btn-outline {
  border: 1.5px solid var(--blue-600);
  color: var(--blue-600);
  background: transparent;
}
.btn-outline:hover { background: var(--blue-100); transform: translateY(-2px); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--orange-500);
  border-radius: 2px;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 800;
  color: var(--navy-800);
  margin: 16px 0;
  line-height: 1.25;
}
.section-head p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #C9DCF0;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, #EDF4FF, #DCEBFF);
  color: var(--blue-600);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.service-card h3 { font-size: 18px; color: var(--navy-800); margin-bottom: 10px; }
.service-card p { font-size: 14.5px; color: var(--muted); line-height: 1.75; }

/* ---------- 头部右侧（导航 + 语言切换 + 菜单按钮） ---------- */
.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  background: none;
  border: 1.5px solid var(--border);
  color: var(--navy-800);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s ease, border-color .2s ease;
}
.lang-switch:hover { background: var(--bg-alt); border-color: #C9DCF0; }

/* ---------- 导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: none;
}
.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue-600), var(--navy-700));
  color: #fff;
  display: grid;
  place-items: center;
}
.brand-icon svg { width: 22px; height: 22px; }
.brand-text strong {
  display: block;
  font-size: 17px;
  color: var(--navy-800);
  line-height: 1.25;
}
.brand-text small {
  display: block;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: .02em;
}

.site-nav { display: flex; align-items: center; gap: 2px; }
.nav-link {
  position: relative;
  padding: 8px 13px;
  font-size: 15px;
  color: #3A4B5C;
  text-decoration: none;
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
}
.nav-link:hover { color: var(--blue-600); }
.nav-link.active { color: var(--blue-600); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 1px;
  height: 2px;
  background: var(--orange-500);
  border-radius: 2px;
}
.nav-cta { margin-left: 10px; padding: 10px 22px; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: var(--navy-800);
  cursor: pointer;
  padding: 8px;
}
.nav-toggle svg { width: 26px; height: 26px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  padding: 92px 0 72px;
  background:
    radial-gradient(900px 480px at 88% -10%, rgba(46, 139, 239, .35), transparent 60%),
    radial-gradient(700px 420px at -8% 108%, rgba(255, 122, 26, .16), transparent 60%),
    linear-gradient(160deg, #0A2238 0%, #0F2E4C 48%, #16406B 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(720px 480px at 60% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
  font-size: 13.5px;
  letter-spacing: .04em;
}

.hero h1 {
  margin: 22px 0 0;
  font-size: clamp(34px, 4.6vw, 54px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: .01em;
}
.h1-line { display: block; }
.h1-line.accent {
  background: linear-gradient(90deg, #7CC0FF, #FFB36B);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  color: #B8C8DA;
  font-size: 17px;
  line-height: 1.85;
  max-width: 520px;
  margin: 22px 0 34px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 30px;
}
.hero-chips li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #CFDCE9;
  font-size: 14px;
}
.hero-chips li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #34D399;
  flex: none;
}

/* 首屏航线图 */
.hero-svg { width: 100%; height: auto; }
.hero-svg .radar circle { fill: none; }
.hero-route {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 7 7;
  animation: dashmove 1.6s linear infinite;
}
.hero-route.route-eu { stroke-width: 2.2; }
.hero-route.route-ghost { stroke-width: 2; stroke-dasharray: 4 9; animation-duration: 2.2s; }

.hero-plane { filter: drop-shadow(0 6px 14px rgba(0, 0, 0, .4)); }
.hero-plane.plane-sm { filter: drop-shadow(0 4px 10px rgba(0, 0, 0, .35)); }

.hero-svg .code { fill: #EAF3FF; font-size: 14px; font-weight: 700; letter-spacing: .05em; }
.hero-svg .city { fill: rgba(255, 255, 255, .55); font-size: 12px; }
.hero-svg text { font-family: var(--font); }

.pulse-ring {
  fill: none;
  stroke-width: 2;
  transform-box: fill-box;
  transform-origin: center;
  animation: pulse 2.6s ease-out infinite;
}

/* 数据条 */
.stats-strip {
  position: relative;
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  overflow: hidden;
}
.stat { padding: 26px 20px; text-align: center; }
.stat + .stat { border-left: 1px solid rgba(255, 255, 255, .14); }
.stat strong { display: block; font-size: 30px; font-weight: 800; color: #fff; }
.stat span { display: block; margin-top: 6px; font-size: 13px; color: #A9BDD1; }

/* ---------- 航线网络 ---------- */
.map-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}
.route-map-svg { width: 100%; height: auto; display: block; }
.route-map-svg .land path { fill: #E7EEF6; stroke: #D7E1EC; stroke-width: 1.5; stroke-linejoin: round; }

.map-routes path {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 8 8;
  animation: dashmove 1.8s linear infinite;
}

.route-map-svg .node .core { fill: #fff; stroke: var(--blue-600); stroke-width: 2.5; }
.route-map-svg .node.cn .core { fill: var(--navy-700); stroke: none; }
.route-map-svg .node.eu .core { stroke: var(--orange-500); }
.route-map-svg .node.eu .pulse-ring { stroke: var(--orange-500); }
.route-map-svg .node.us .pulse-ring { stroke: var(--blue-600); }

.route-map-svg .code { fill: var(--navy-700); font-size: 17px; font-weight: 800; letter-spacing: .04em; }
.route-map-svg .city { fill: var(--muted); font-size: 14px; }
.route-map-svg text { font-family: var(--font); }

.map-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px 28px;
  margin: 6px 0 40px;
}
.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13.5px;
  color: var(--muted);
}
.legend-chip .dot { width: 10px; height: 10px; border-radius: 50%; }
.legend-chip .dot.us { background: var(--blue-500); }
.legend-chip .dot.eu { background: var(--orange-500); }

.route-cards { margin-bottom: 40px; }
.route-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}
.route-card-head h3 { font-size: 21px; color: var(--navy-800); }
.route-chip {
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}
.route-chip.us { background: var(--blue-100); color: #155BB5; }
.route-chip.eu { background: var(--orange-100); color: #C25E00; }

.route-card.us { border-top: 4px solid var(--blue-500); }
.route-card.eu { border-top: 4px solid var(--orange-500); }

.route-facts li {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--border);
}
.route-facts li:last-child { border-bottom: 0; }
.route-facts span { color: var(--muted); font-size: 13.5px; flex: none; }
.route-facts strong {
  font-size: 14.5px;
  color: var(--text);
  text-align: right;
  line-height: 1.6;
}

/* 时效表 */
.transit-table-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: var(--shadow);
}
.table-scroll { overflow-x: auto; }
.transit-table { width: 100%; border-collapse: collapse; min-width: 620px; }
.transit-table th {
  background: var(--navy-800);
  color: #fff;
  text-align: left;
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}
.transit-table th:first-child { border-radius: 10px 0 0 0; }
.transit-table th:last-child { border-radius: 0 10px 0 0; }
.transit-table td {
  padding: 14px 18px;
  font-size: 14.5px;
  border-bottom: 1px solid var(--border);
  color: #3A4B5C;
  white-space: nowrap;
}
.transit-table tbody tr:last-child td { border-bottom: 0; }
.transit-table tbody td:first-child { font-weight: 700; color: var(--navy-800); }

.table-note {
  font-size: 13px;
  color: var(--muted);
  padding: 12px 10px 8px;
  line-height: 1.7;
}

/* ---------- 我们的优势 ---------- */
.why-item { display: flex; gap: 16px; align-items: flex-start; padding: 26px; }
.why-item .card-icon { margin-bottom: 0; flex: none; }
.why-item h3 { font-size: 17px; color: var(--navy-800); margin-bottom: 8px; }
.why-item p { font-size: 14px; color: var(--muted); line-height: 1.75; }

/* ---------- 操作流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  position: relative;
}
.steps::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 9%;
  right: 9%;
  border-top: 2px dashed #C9D8EA;
  z-index: 0;
}
.step { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--blue-600);
  color: var(--blue-600);
  font-size: 20px;
  font-weight: 800;
  display: grid;
  place-items: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 12px rgba(30, 111, 235, .12);
}
.step h3 { font-size: 16px; color: var(--navy-800); margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--muted); line-height: 1.7; max-width: 220px; margin: 0 auto; }

/* ---------- 运费估算 ---------- */
.quote-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 28px;
  align-items: start;
}

.quote-card { box-shadow: var(--shadow); }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 14px; font-weight: 600; color: var(--navy-800); }
.field input, .field select, .field textarea {
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: #fff;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(46, 139, 239, .15);
}
.field textarea { resize: vertical; min-height: 88px; }

.form-hint {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
  margin: -4px 0 18px;
}
.form-note {
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.7;
  margin-top: 14px;
  text-align: center;
}

.quote-result {
  margin-top: 20px;
  padding: 20px;
  background: linear-gradient(135deg, #F0F7FF, #EAF3FF);
  border: 1px solid #D6E7FF;
  border-radius: 12px;
}
.qr-main { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 10px; }
.qr-item { flex: 1; min-width: 150px; }
.qr-item span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.qr-item strong { font-size: 23px; color: var(--navy-800); }
.qr-price strong { color: var(--orange-500); }
.qr-line { font-size: 13.5px; color: var(--muted); margin: 6px 0; line-height: 1.7; }
.qr-basis {
  font-size: 13px;
  color: var(--muted);
  border-top: 1px dashed #C9DDF6;
  padding-top: 12px;
  margin-top: 12px;
  line-height: 1.7;
}

.quote-disclaimer {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 16px;
  line-height: 1.7;
}

.quote-side h3 { font-size: 19px; color: var(--navy-800); margin-bottom: 6px; }
.check-list { margin: 14px 0 26px; }
.check-list li {
  display: flex;
  gap: 12px;
  padding: 9px 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
}
.check-list li::before {
  content: "✓";
  color: var(--blue-600);
  font-weight: 700;
  flex: none;
}

/* ---------- 常见问题 ---------- */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item.open { border-color: #BBD5F5; box-shadow: var(--shadow); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-800);
  text-align: left;
}
.faq-q .chev {
  width: 20px;
  height: 20px;
  color: var(--muted);
  flex: none;
  transition: transform .3s ease;
}
.faq-item.open .chev { transform: rotate(180deg); color: var(--blue-600); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.open .faq-a { max-height: 400px; }
.faq-a p {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 28px;
  align-items: start;
}

.info-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 14px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.info-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.info-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--blue-100);
  color: var(--blue-600);
  display: grid;
  place-items: center;
  flex: none;
}
.info-icon .ic { width: 20px; height: 20px; }
.info-card span { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 3px; }
.info-value {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
  line-height: 1.5;
  word-break: break-all;
}
a.info-value:hover { color: var(--blue-600); }

.contact-form { box-shadow: var(--shadow); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy-900);
  color: #9FB2C6;
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr 1.4fr;
  gap: 40px;
  padding-bottom: 48px;
}
.brand-light .brand-text strong { color: #fff; }
.brand-light .brand-text small { color: #9FB2C6; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 18px;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: #9FB2C6;
  text-decoration: none;
  padding: 4px 0;
  font-size: 14px;
  transition: color .2s ease;
}
.footer-col a:hover { color: #fff; }

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0; }
.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
}
.copyright { margin: 0; }
.icp { margin: 0; }
.icp a { color: #9FB2C6; text-decoration: none; }
.icp a:hover { color: #fff; }

/* ---------- 提示气泡 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 20px);
  background: var(--navy-800);
  color: #fff;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease, transform .3s ease;
  z-index: 200;
  max-width: 90vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 滚动显现动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.grid > .reveal:nth-child(2) { transition-delay: .08s; }
.grid > .reveal:nth-child(3) { transition-delay: .16s; }
.grid > .reveal:nth-child(4) { transition-delay: .08s; }
.grid > .reveal:nth-child(5) { transition-delay: .16s; }
.grid > .reveal:nth-child(6) { transition-delay: .24s; }

/* ---------- 动画关键帧 ---------- */
@keyframes dashmove {
  to { stroke-dashoffset: -30; }
}
@keyframes pulse {
  0% { transform: scale(.6); opacity: .9; }
  100% { transform: scale(2.4); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 36px; }
  .steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 82vw);
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 96px 28px 32px;
    transform: translateX(100%);
    transition: transform .3s ease;
    box-shadow: -12px 0 40px rgba(10, 34, 56, .18);
    z-index: 99;
  }
  .site-nav.open { transform: none; }
  .nav-link { padding: 12px 10px; font-size: 16px; }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: var(--blue-100); border-radius: 8px; }
  .nav-cta { margin: 12px 0 0; }
  .nav-toggle { display: block; z-index: 100; }

  .hero-inner { grid-template-columns: 1fr; gap: 20px; }
  .hero-scene { display: none; }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat { border-top: 1px solid rgba(255, 255, 255, .14); }
  .stat:nth-child(-n+2) { border-top: 0; }

  .quote-grid, .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-actions .btn { width: 100%; }
  .route-card-head { flex-wrap: wrap; }
}