:root {
  --blue: #1677ff;
  --blue-dark: #0b3d91;
  --navy: #0c1b33;
  --text: #1d2129;
  --muted: #4e5969;
  --line: #e5e6eb;
  --bg: #f6f7fb;
  --white: #ffffff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}
img { max-width: 100%; border: 0; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.topbar {
  background: var(--navy);
  color: rgba(255,255,255,.82);
  font-size: 13px;
  position: relative;
  z-index: 2;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 36px;
}

.nav {
  background: #fff;
  border-bottom: 1px solid var(--line);
  height: 75px;
  overflow: hidden;
  position: relative;
  z-index: 40;
}
.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 75px;
  padding-top: 0;
  padding-bottom: 0;
  overflow: hidden;
}
.brand {
  display: flex;
  align-items: center;
  height: 75px;
  overflow: hidden;
  flex-shrink: 0;
  background: transparent !important;
}
.brand img {
  height: 56px;
  width: auto;
  max-width: none;
  display: block;
  background: transparent !important;
  border: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  gap: 4px;
  flex-wrap: nowrap;
}
.nav-links a {
  color: #000;
  font-weight: 700;
  font-size: 23px;
  line-height: 1.15;
  padding: 0 8px;
  text-decoration: none;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.on {
  color: #000;
}
.nav-phone {
  color: var(--navy) !important;
  font-weight: 700;
  text-decoration: none !important;
}

.hero {
  position: relative;
  min-height: 520px;
  background: var(--navy) url("hero-truck.jpg") center center no-repeat;
  background-size: cover;
  color: #fff;
}
.hero-mask {
  position: absolute;
  left: 0; top: 0; right: 0; bottom: 0;
  z-index: 0;
  background: linear-gradient(90deg, rgba(8,16,32,.88) 0%, rgba(8,16,32,.55) 46%, rgba(8,16,32,.18) 100%);
}
.hero-body {
  position: relative;
  z-index: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 88px 24px 120px;
}
.hero-body .tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 2px;
  color: #d6e4ff;
  margin-bottom: 16px;
}
.hero-body h1 {
  font-size: 48px;
  line-height: 1.2;
  font-weight: 800;
  margin-bottom: 16px;
}
.hero-body p {
  max-width: 560px;
  font-size: 16px;
  color: rgba(255,255,255,.88);
  margin-bottom: 28px;
}
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  background: var(--blue);
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 4px;
}
.btn:hover { background: #3c89ff; }
.btn-line {
  background: transparent;
  border: 1px solid rgba(255,255,255,.55);
}

.features {
  margin-top: -56px;
  position: relative;
  z-index: 2;
  padding-bottom: 8px;
}
.features-box {
  background: #fff;
  box-shadow: 0 10px 30px rgba(15, 23, 42, .12);
  display: flex;
  flex-wrap: wrap;
}
.feat {
  width: 25%;
  padding: 28px 24px;
  border-right: 1px solid var(--line);
}
.feat:last-child { border-right: 0; }
.feat h3 { font-size: 16px; margin: 8px 0 6px; color: var(--navy); }
.feat p { font-size: 13px; color: var(--muted); }
.feat svg { display: block; }

.section {
  padding: 64px 0;
}
.section h2 {
  font-size: 28px;
  color: var(--navy);
  margin-bottom: 8px;
}
.section .desc {
  color: var(--muted);
  margin-bottom: 28px;
}
.cards {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -10px;
}
.card {
  width: 33.333%;
  padding: 10px;
}
.card-in {
  height: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 24px;
}
.card-in h3 { font-size: 17px; margin-bottom: 8px; color: var(--navy); }
.card-in p { font-size: 14px; color: var(--muted); }
.num {
  width: 32px;
  height: 32px;
  line-height: 32px;
  text-align: center;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  border-radius: 4px;
  margin-bottom: 12px;
  font-size: 14px;
}

.principles {
  background: var(--bg);
}
.prin-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -10px;
}
.prin {
  width: 33.333%;
  padding: 10px;
}
.prin-in {
  background: #fff;
  padding: 28px 24px;
  border-top: 3px solid var(--blue);
  height: 100%;
}
.prin-in b { display: block; font-size: 22px; color: var(--navy); margin-bottom: 8px; }
.prin-in span { color: var(--muted); font-size: 14px; }

.company {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -10px;
}
.company-main, .company-side {
  padding: 10px;
}
.company-main { width: 62%; }
.company-side { width: 38%; }
.box {
  background: var(--bg);
  border: 1px solid var(--line);
  padding: 24px 28px;
  height: 100%;
}
.row {
  display: flex;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}
.row:last-child { border-bottom: 0; }
.row .k { width: 140px; color: var(--muted); flex-shrink: 0; }
.row .v { font-weight: 700; }
.hotline {
  background: var(--navy);
  color: #fff;
  padding: 28px;
  height: 100%;
}
.hotline h3 { margin-bottom: 8px; }
.hotline p { color: rgba(255,255,255,.72); font-size: 14px; margin-bottom: 16px; }
.hotline .big {
  display: block;
  color: #fff;
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 1px;
  text-decoration: none;
  margin-bottom: 8px;
}

.page-head {
  background: var(--navy);
  color: #fff;
  padding: 0 0 36px;
}
.page-head h1 { font-size: 30px; margin-bottom: 6px; }
.page-head p { color: rgba(255,255,255,.7); }
.article {
  max-width: 1120px;
  margin: 0 auto;
  padding: 40px 24px 64px;
}
.article-in {
  background: #fff;
  border: 1px solid var(--line);
  padding: 32px;
}
.article-in h3 { margin: 24px 0 8px; color: var(--navy); font-size: 18px; }
.article-in h3:first-child { margin-top: 0; }
.article-in p, .article-in li { margin-bottom: 8px; font-size: 15px; }
.article-in ul { padding-left: 1.3em; margin-bottom: 12px; }
.meta { width: 100%; border-collapse: collapse; font-size: 14px; }
.meta th, .meta td {
  border-bottom: 1px solid var(--line);
  padding: 12px 8px;
  text-align: left;
  vertical-align: top;
}
.meta th { width: 180px; color: var(--muted); font-weight: 700; }

.footer {
  background: #0a1324;
  color: rgba(255,255,255,.7);
  padding: 36px 0 24px;
  font-size: 13px;
}
.footer a { color: #9ec5ff; }
.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.footer strong { color: #fff; font-size: 16px; display: block; margin-bottom: 8px; }
.footer-links a { display: block; margin: 6px 0; }
.icp {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 14px;
}

@media (max-width: 1100px) {
  .nav-phone { display: none; }
}
@media (max-width: 900px) {
  .hero-body { padding: 56px 24px 90px; }
  .hero-body h1 { font-size: 32px; }
  .feat, .card, .prin { width: 50%; }
  .feat { border-bottom: 1px solid var(--line); }
  .company-main, .company-side { width: 100%; }
  .nav { height: auto; }
  .nav .container { height: auto; padding: 8px 24px; flex-wrap: wrap; }
  .nav-links { width: 100%; overflow-x: auto; }
}
@media (max-width: 640px) {
  .feat, .card, .prin { width: 100%; }
  .topbar .container { height: auto; padding: 8px 24px; }
}