/* ============================================================
   湖南德嘉物流有限公司 — 全站共用样式
   纯 CSS，无外部依赖、无图标库、无 CDN
   ============================================================ */

:root {
  --navy-900: #0b1f35;
  --navy-800: #0f2a47;
  --navy-700: #143a5c;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --text: #1f2937;
  --muted: #4b5b6e;
  --bg: #f5f7fa;
  --border: #e2e8f0;
  --white: #ffffff;
  --radius: 12px;
}

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

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

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}

main { display: block; }

img { max-width: 100%; height: auto; display: block; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.35; }

a:focus-visible,
button:focus-visible,
summary:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

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

/* ===================== 顶部导航 ===================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--navy-800);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
}

.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand:hover { text-decoration: none; }

.brand-logo {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 50px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.10);
  border: 1px dashed rgba(255, 255, 255, 0.45);
  font-size: 8px;
  line-height: 1.3;
  color: #c9dcef;
  text-align: center;
  letter-spacing: 0;
  overflow: hidden;
}

.brand-text strong { display: block; font-size: 17px; letter-spacing: 0.5px; color: #fff; }
.brand-text small { display: block; font-size: 12px; color: #9fb8d4; }

.site-nav { display: flex; align-items: center; gap: 8px; }

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 9px 14px;
  border-radius: 8px;
  font-size: 15px;
  color: #dbe7f5;
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.10);
  color: #fff;
  text-decoration: none;
}

.site-nav a.active { background: var(--blue); color: #fff; }

.site-nav .nav-phone {
  margin-left: 8px;
  padding: 9px 16px;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

.site-nav .nav-phone:hover { background: var(--blue-dark); color: #fff; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(255, 255, 255, 0.30);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.10);
  color: #fff;
  font-size: 15px;
  font-family: inherit;
  cursor: pointer;
}

/* ===================== 按钮 ===================== */

.btn {
  display: inline-block;
  padding: 12px 26px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  text-align: center;
  transition: background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.btn:hover { text-decoration: none; }

.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); color: #fff; }

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.16); color: #fff; }

.btn-outline {
  background: #fff;
  color: var(--navy-800);
  border-color: #cbd5e1;
}
.btn-outline:hover { background: #eef4ff; border-color: var(--blue); color: var(--blue-dark); }

.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ===================== 首屏 / 页头 ===================== */

.hero {
  padding: 78px 0 86px;
  color: #fff;
  background: linear-gradient(135deg, #0b1f35 0%, #143a5c 55%, #1c4a75 100%);
}

.hero h1 {
  margin: 0 0 18px;
  font-size: clamp(26px, 4.4vw, 42px);
  letter-spacing: 1px;
}

.hero .lead {
  max-width: 780px;
  margin: 0 0 30px;
  font-size: clamp(15px, 2.1vw, 19px);
  color: #c3d6e9;
}

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

.page-hero {
  padding: 58px 0;
  color: #fff;
  background: linear-gradient(135deg, #0b1f35 0%, #143a5c 100%);
}

.page-hero h1 { margin: 0 0 14px; font-size: clamp(24px, 3.6vw, 36px); }
.page-hero p { max-width: 840px; margin: 0; font-size: 15px; color: #c3d6e9; }

/* ===================== 通用区块 ===================== */

.section { padding: 66px 0; }
.section-white { background: #fff; }

.section-head { max-width: 800px; margin: 0 auto 42px; text-align: center; }
.section-head h2 {
  margin: 0 0 14px;
  font-size: clamp(22px, 3vw, 30px);
  color: var(--navy-800);
  letter-spacing: 0.5px;
}
.section-head p { margin: 0; color: var(--muted); }

/* ===================== 栅格 ===================== */

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ===================== 卡片 ===================== */

.card {
  padding: 26px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 3px rgba(15, 42, 71, 0.05);
}

.card h3 { margin: 0 0 10px; font-size: 18px; color: var(--navy-800); }
.card p { margin: 0; font-size: 15px; color: var(--muted); }
.card p + p { margin-top: 10px; }

.adv-card .num {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 10px;
  border-radius: 6px;
  background: #e8f0fe;
  color: var(--blue);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
}

.intro-card p { font-size: 16px; line-height: 1.9; }

/* ===================== 图片占位框 ===================== */

.img-ph {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  padding: 18px;
  border: 2px dashed #b9c7d8;
  border-radius: 10px;
  background: #eef2f7;
  color: #64748b;
  font-size: 13px;
  line-height: 1.7;
  text-align: center;
}

.img-ph.tall { min-height: 240px; }
.img-ph-block { margin-top: 14px; }

/* ===================== 列表 ===================== */

.check-list { margin: 0; padding: 0; list-style: none; }

.check-list li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 24px;
  font-size: 15px;
  color: var(--muted);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--blue);
  font-weight: 700;
}

.check-list li:last-child { margin-bottom: 0; }

/* ===================== 联系方式条 ===================== */

.contact-bar {
  padding: 52px 0;
  background: var(--navy-800);
  color: #fff;
}

.contact-bar h2 {
  margin: 0 0 28px;
  font-size: clamp(20px, 2.6vw, 26px);
  color: #fff;
  text-align: center;
}

.contact-item {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
}

.contact-item .k {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: #9fb8d4;
}

.contact-item .v {
  display: block;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: #fff;
  word-break: break-word;
}

.contact-item a.v:hover { color: #9dc4ff; text-decoration: none; }

/* ===================== 社媒占位 ===================== */

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.social-item {
  padding: 10px 22px;
  border: 1px dashed #b9c7d8;
  border-radius: 999px;
  background: #fff;
  color: var(--navy-800);
  font-size: 15px;
  font-weight: 600;
}

/* ===================== 地图区块 ===================== */

.map-block {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 30px;
  align-items: center;
}

.map-block h3 { margin: 0 0 12px; font-size: 20px; color: var(--navy-800); }
.map-block p { margin: 0 0 20px; color: var(--muted); font-size: 15px; }

@media (max-width: 820px) {
  .map-block { grid-template-columns: 1fr; }
}

/* ===================== 服务详情条目 ===================== */

.service-list { display: grid; gap: 16px; }

.service-item {
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--blue);
  border-radius: 10px;
  background: #fff;
}

.service-item h3 { margin: 0 0 10px; font-size: 18px; color: var(--navy-800); }
.service-item p { margin: 0 0 12px; font-size: 15px; color: var(--muted); }

.service-item .scene {
  margin: 0;
  padding: 8px 14px;
  border-radius: 6px;
  background: #f1f5f9;
  font-size: 14px;
  color: var(--navy-800);
}

.service-item .scene b { color: var(--blue); }

/* ===================== 表格 ===================== */

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

table.lines {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 15px;
}

table.lines th {
  padding: 14px 18px;
  background: var(--navy-800);
  color: #fff;
  font-weight: 600;
  text-align: left;
  white-space: nowrap;
}

table.lines td {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  vertical-align: top;
}

table.lines tbody tr:nth-child(even) { background: #fafcff; }

table.lines td:first-child {
  min-width: 190px;
  color: var(--navy-800);
  font-weight: 600;
}

/* ===================== 服务流程步骤 ===================== */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }

@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .steps { grid-template-columns: 1fr; } }

.step {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.step .n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
}

.step h3 { margin: 0 0 8px; font-size: 16px; color: var(--navy-800); }
.step p { margin: 0; font-size: 14px; color: var(--muted); }

/* ===================== FAQ 折叠 ===================== */

.faq {
  margin-bottom: 12px;
  padding: 16px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
}

.faq summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-800);
  cursor: pointer;
  list-style: none;
}

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

.faq summary::after {
  content: "＋";
  flex: none;
  color: var(--blue);
  font-weight: 700;
}

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

.faq p { margin: 12px 0 0; font-size: 15px; color: var(--muted); }

/* ===================== CTA 区块 ===================== */

.cta {
  padding: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, #0f2a47, #1c4a75);
  color: #fff;
  text-align: center;
}

.cta h2 { margin: 0 0 14px; font-size: clamp(20px, 2.8vw, 26px); color: #fff; }

.cta p {
  max-width: 780px;
  margin: 0 auto 26px;
  font-size: 15px;
  color: #c3d6e9;
}

@media (max-width: 640px) { .cta { padding: 28px 20px; } }

/* ===================== 电话卡片 ===================== */

.phone-card {
  display: block;
  padding: 28px 26px;
  border: 1px solid var(--border);
  border-top: 4px solid var(--blue);
  border-radius: 14px;
  background: #fff;
  color: var(--navy-800);
  text-align: center;
  box-shadow: 0 2px 6px rgba(15, 42, 71, 0.06);
  transition: box-shadow 0.2s, transform 0.2s;
}

.phone-card:hover {
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(15, 42, 71, 0.14);
  transform: translateY(-2px);
}

.phone-card .k { display: block; margin-bottom: 8px; font-size: 14px; color: var(--muted); }

.phone-card .v {
  display: block;
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--navy-800);
}

.phone-card .tip { display: block; margin-top: 10px; font-size: 13px; color: var(--blue); }

/* ===================== 信息列表 ===================== */

.info-list { margin: 0; padding: 0; list-style: none; }

.info-list li {
  display: flex;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px dashed #dbe4ee;
  font-size: 15px;
  color: var(--muted);
}

.info-list li:last-child { border-bottom: 0; }

.info-list .k { flex: none; min-width: 92px; font-weight: 600; color: var(--navy-800); }

/* ===================== 时间线 ===================== */

.timeline {
  margin: 0 0 0 8px;
  padding: 0;
  list-style: none;
  border-left: 3px solid #dbe4ee;
}

.timeline li { position: relative; padding: 0 0 28px 26px; }
.timeline li:last-child { padding-bottom: 0; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 6px;
  width: 14px;
  height: 14px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 2px #dbe4ee;
}

.timeline strong { display: block; margin-bottom: 4px; color: var(--navy-800); }
.timeline span { color: var(--muted); font-size: 15px; }

/* ===================== 页脚 ===================== */

.site-footer {
  padding-top: 52px;
  background: var(--navy-900);
  color: #b9c9da;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1.4fr 1fr;
  gap: 34px;
}

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

.footer-brand { display: flex; gap: 12px; align-items: flex-start; }
.footer-brand strong { display: block; margin-bottom: 6px; font-size: 16px; color: #fff; }
.footer-brand p { margin: 0; font-size: 14px; color: #8ba2b8; }

.site-footer h4 { margin: 0 0 14px; font-size: 15px; color: #fff; }
.site-footer a { color: #b9c9da; }
.site-footer a:hover { color: #fff; }

.footer-list { margin: 0; padding: 0; list-style: none; }
.footer-list li { margin-bottom: 9px; }
.footer-list li:last-child { margin-bottom: 0; }

.footer-bottom {
  margin-top: 40px;
  padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 13px;
  line-height: 1.9;
  color: #8ba2b8;
  text-align: center;
}

/* ===================== 移动端适配 ===================== */

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 20px 20px;
    background: var(--navy-800);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 14px 26px rgba(0, 0, 0, 0.28);
  }

  .site-nav.open { display: flex; }

  .site-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }

  .site-nav a { padding: 12px 12px; }

  .site-nav .nav-phone { margin: 10px 0 0; text-align: center; }
}

@media (max-width: 640px) {
  .section { padding: 44px 0; }
  .hero { padding: 52px 0 58px; }
  .page-hero { padding: 40px 0; }
  .card { padding: 22px 18px; }
  .brand-text strong { font-size: 15px; }
  .brand-text small { font-size: 11px; }
  .brand-logo { width: 50px; height: 44px; }
  .contact-bar { padding: 40px 0; }
  .footer-bottom { text-align: left; }
}