:root {
  --ink: #102a2e;
  --ink-soft: #3d5458;
  --muted: #6b7f83;
  --brand-900: #062c27;
  --brand-700: #0b4f45;
  --brand: #0f7a5a;
  --brand-bright: #16a37a;
  --brand-soft: #e8f6f0;
  --accent: #f5a623;
  --accent-dark: #a85f00;
  --bg: #f4f7f6;
  --card: #ffffff;
  --line: #e1eae7;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 50px -30px rgba(6, 44, 39, 0.4);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; letter-spacing: -0.01em; }
p { margin: 0 0 12px; }
ul, ol { margin: 0; padding: 0; }

.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 顶部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-bright));
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
  border-radius: 9px;
  padding: 6px 9px;
  flex: 0 0 auto;
}

.brand-text {
  font-size: 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
  font-size: 15px;
}

.site-nav a { color: var(--ink-soft); }
.site-nav a:hover { color: var(--brand); }

.header-actions { display: flex; gap: 10px; align-items: center; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 999px;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
  text-align: center;
}

.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 20px -14px rgba(6, 44, 39, 0.5); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--brand-700), var(--brand-bright));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 12px 24px -14px rgba(15, 122, 90, 0.75);
}

.btn-accent {
  background: linear-gradient(135deg, #ffc247, var(--accent));
  border-color: transparent;
  color: #3f2a00;
  box-shadow: 0 12px 24px -14px rgba(245, 166, 35, 0.9);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.32);
  color: #fff;
}

.btn-sm { padding: 7px 14px; font-size: 14px; }
.btn-lg { padding: 14px 24px; font-size: 16px; }

/* 首屏 */
.hero {
  background:
    radial-gradient(1000px 600px at 90% -10%, rgba(22, 163, 122, 0.55), transparent 60%),
    radial-gradient(800px 500px at 0% 100%, rgba(245, 166, 35, 0.18), transparent 55%),
    linear-gradient(135deg, var(--brand-900), var(--brand-700) 55%, #0d6b55);
  color: #fff;
  padding: 64px 0 76px;
  overflow: hidden;
}

.hero-compact { padding: 40px 0 56px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 12px;
}

.hero .eyebrow { color: #8fe3c9; }

.hero h1 {
  font-size: clamp(2rem, 4.6vw, 3.3rem);
  font-weight: 800;
  margin-bottom: 18px;
  max-width: 16em;
}

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.86);
  max-width: 42em;
  margin-bottom: 26px;
}

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

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  list-style: none;
  margin-top: 28px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

.hero-points li { position: relative; padding-left: 18px; }
.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.hero-media {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
}

.hero-media img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }

.city-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.fact { display: flex; flex-direction: column; gap: 2px; }
.fact span { font-size: 12px; color: rgba(255, 255, 255, 0.62); letter-spacing: 0.04em; }
.fact strong { font-size: 15px; color: #fff; }

/* 首屏联系条（城市页） */
.contact-strip {
  background: var(--brand-soft);
  border-bottom: 1px solid #d6ece2;
}

.strip-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  font-size: 14px;
  color: var(--ink-soft);
}

.strip-inner p { margin: 0; }
.strip-inner strong { color: var(--brand-900); }
.strip-actions { display: flex; gap: 8px; flex: 0 0 auto; }

.strip-inner .btn-ghost {
  background: #fff;
  border-color: #cfe4da;
  color: var(--ink);
}

/* 区块 */
.section { padding: 68px 0; }
.section:nth-of-type(even) { background: #fff; }

.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 800; }
.section-head p { color: var(--muted); margin-bottom: 0; }

/* 车型 */
.vehicle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
}

.vehicle-item {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.vehicle-item:hover { border-color: #b9dccd; transform: translateY(-2px); }

.vehicle-index {
  font-size: 12px;
  font-weight: 800;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 8px;
  padding: 6px 8px;
  letter-spacing: 0.05em;
}

.vehicle-name { font-weight: 700; font-size: 16px; }

/* 资料 */
.material-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.material-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

.material-card h3 { font-size: 17px; margin-bottom: 8px; }
.material-card p { color: var(--muted); margin: 0; font-size: 15px; }

/* 流程 */
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  list-style: none;
  counter-reset: step;
}

.step-item {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px 22px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-700), var(--brand-bright));
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 16px;
}

.step-item h3 { font-size: 16px; margin-bottom: 6px; }
.step-item p { color: var(--muted); font-size: 14px; margin: 0; }

/* 城市入口 */
.province-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  margin-bottom: 18px;
}

.province-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.province-head h3 { margin: 0; font-size: 18px; }

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  border-bottom: 1px dashed rgba(15, 122, 90, 0.4);
  padding-bottom: 1px;
}

.text-link:hover { color: var(--brand-900); border-color: var(--brand-900); }

.city-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.city-grid-lg { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }

.city-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px;
  border-radius: var(--radius-sm);
  background: #f7fbf9;
  border: 1px solid #dbeae3;
  color: var(--ink);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.city-card:hover {
  background: #fff;
  border-color: var(--brand-bright);
  transform: translateY(-2px);
}

.city-name { font-size: 18px; font-weight: 800; }
.city-meta { font-size: 13px; color: var(--muted); }
.city-arrow { margin-top: 8px; font-size: 13px; font-weight: 600; color: var(--brand); }

.empty-state { color: var(--muted); font-size: 14px; margin: 0; }

/* 本地化说明 */
.local-section { background: #fff; }

.local-block {
  max-width: 940px;
  margin: 0 auto;
  background: linear-gradient(135deg, #f3fbf7, #eef7f3);
  border: 1px solid #d8ece2;
  border-left: 5px solid var(--brand);
  border-radius: var(--radius);
  padding: 36px 40px;
}

.local-block h2 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.local-block p { color: var(--ink-soft); font-size: 16px; }
.local-note { font-size: 14px; color: var(--muted); margin-bottom: 0; }

/* FAQ */
.faq-list { display: grid; gap: 10px; max-width: 900px; }

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0 22px;
  transition: border-color 0.2s ease;
}

.faq-item[open] { border-color: #bfddce; }

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 34px 18px 0;
  position: relative;
  font-weight: 700;
  font-size: 15px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 22px;
  font-weight: 400;
  color: var(--brand);
  line-height: 1;
}

.faq-item[open] summary::after { content: "−"; }

.faq-item p {
  margin: 0;
  padding: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
  border-top: 1px solid #eef4f1;
  padding-top: 16px;
}

/* 联系方式卡片 */
.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: 40px;
  align-items: center;
  background:
    radial-gradient(700px 300px at 100% 0%, rgba(22, 163, 122, 0.5), transparent 60%),
    linear-gradient(135deg, var(--brand-900), var(--brand-700));
  color: #fff;
  border-radius: 24px;
  padding: 46px;
  margin: 0 0 72px;
  box-shadow: 0 40px 80px -50px rgba(6, 44, 39, 0.8);
}

.contact-card .eyebrow { color: #8fe3c9; }
.contact-card h2 { color: #fff; font-size: clamp(1.4rem, 2.6vw, 2rem); margin-bottom: 10px; }
.contact-card p { color: rgba(255, 255, 255, 0.8); margin-bottom: 16px; }

.contact-list { list-style: none; display: flex; flex-wrap: wrap; gap: 12px 40px; margin: 0; }
.contact-list li { display: flex; flex-direction: column; gap: 2px; }
.contact-list span { font-size: 12px; color: rgba(255, 255, 255, 0.6); letter-spacing: 0.05em; }
.contact-list strong { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: 0.02em; }

.contact-actions { display: flex; flex-direction: column; gap: 12px; }
.contact-actions .btn-ghost { background: rgba(255, 255, 255, 0.12); }
.contact-tip { font-size: 12px; color: rgba(255, 255, 255, 0.55); text-align: center; margin: 0; }

/* 页脚 */
.site-footer {
  background: #08211f;
  color: rgba(255, 255, 255, 0.72);
  padding-top: 54px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 0.6fr;
  gap: 36px;
  padding-bottom: 40px;
}

.footer-brand { color: #fff; font-weight: 700; font-size: 17px; display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-col h3 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.footer-col p { margin: 0 0 8px; }
.footer-col a { color: rgba(255, 255, 255, 0.85); }
.footer-col a:hover { color: #fff; }
.footer-col strong { color: #fff; letter-spacing: 0.03em; }

.copy-link {
  background: none;
  border: none;
  color: #8fe3c9;
  font-size: 12px;
  padding: 0 2px;
  text-decoration: underline;
}

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 18px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: rgba(255, 255, 255, 0.5); }

/* 404 / 500 */
.error-main { padding: 90px 20px 110px; max-width: 760px; }
.error-main h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.error-main p { color: var(--muted); }
.error-main .hero-actions { margin-top: 24px; }
.error-main .text-link { margin-left: 6px; }

/* 移动端固定联系栏 */
.mobile-bar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 80;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  box-shadow: 0 -12px 30px -22px rgba(6, 44, 39, 0.8);
  padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  gap: 10px;
}

.mobile-bar-item {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 12px;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background: transparent;
  text-align: left;
}

.mobile-bar-item small { display: block; font-weight: 500; font-size: 11px; color: var(--muted); }
.mobile-tel { background: linear-gradient(135deg, var(--brand-700), var(--brand-bright)); color: #fff; }
.mobile-tel small { color: rgba(255, 255, 255, 0.8); }
.mobile-copy { background: #fff7e6; border: 1px solid #f3dcae; color: #7a4b00; }
.mobile-copy small { color: #a57a2d; }
.mobile-icon { width: 20px; height: 20px; fill: currentColor; flex: 0 0 auto; }

/* 复制提示 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 96px;
  transform: translate(-50%, 12px);
  background: rgba(8, 33, 31, 0.94);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 14px;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 18px;
}

.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: #fff; }

/* 响应式 */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-media { order: 2; }
  .hero { padding: 48px 0 56px; }
  .hero h1 { max-width: none; }
  .vehicle-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .material-grid { grid-template-columns: 1fr; }
  .step-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-card { grid-template-columns: 1fr; gap: 26px; padding: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 15px; padding-bottom: 76px; }
  .header-inner { min-height: 60px; gap: 10px; }
  .site-nav { display: none; }
  .brand-text { font-size: 14px; }
  .header-actions .btn { padding: 7px 13px; font-size: 13px; }
  .hero { padding: 38px 0 44px; }
  .hero-desc { font-size: 15px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .hero-points { gap: 8px 16px; font-size: 13px; margin-top: 22px; }
  .city-facts { grid-template-columns: 1fr; gap: 12px; }
  .fact { flex-direction: row; justify-content: space-between; align-items: baseline; }
  .contact-strip .strip-inner { flex-direction: column; align-items: flex-start; padding: 10px 20px; }
  .strip-actions { width: 100%; }
  .strip-actions .btn { flex: 1; }
  .section { padding: 44px 0; }
  .section-head { margin-bottom: 24px; }
  .vehicle-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .vehicle-item { padding: 14px; }
  .step-grid { grid-template-columns: 1fr; }
  .city-grid, .city-grid-lg { grid-template-columns: 1fr; }
  .province-group { padding: 18px; }
  .province-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .local-block { padding: 24px 22px; }
  .contact-card { padding: 26px 22px; border-radius: 18px; margin-bottom: 48px; }
  .contact-list { gap: 10px 28px; }
  .contact-list strong { font-size: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-bottom: 30px; }
  .footer-bottom-inner { flex-direction: column; gap: 6px; }
  .mobile-bar { display: flex; }
  .toast { bottom: 96px; }
}

@media (max-width: 420px) {
  .vehicle-grid { grid-template-columns: 1fr; }
  .brand-text { max-width: 120px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}