:root {
  --orange: #f26b21;
  --orange-dark: #c94c13;
  --green: #1d7b56;
  --ink: #17212b;
  --muted: #69727d;
  --line: #e8edf1;
  --bg: #f6f7f8;
  --white: #fff;
  --shadow: 0 18px 45px rgba(21, 32, 43, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }

.topbar {
  background: #111922;
  color: rgba(255,255,255,.82);
  font-size: 14px;
}
.topbar-inner {
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(232,237,241,.9);
}
.nav-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo-box {
  width: 52px;
  height: 52px;
  flex: 0 0 52px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(23,33,43,.08);
  box-shadow: 0 10px 24px rgba(242,107,33,.28);
}
.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand strong { display: block; font-size: 24px; letter-spacing: 2px; }
.brand small { display: block; color: var(--muted); font-size: 11px; letter-spacing: 1px; margin-top: -4px; }
.nav-links { display: flex; align-items: center; gap: 30px; font-weight: 700; color: #303943; }
.nav-links a { position: relative; padding: 28px 0; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 20px;
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--orange);
  transition: width .2s ease;
}
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 11px 22px;
  border-radius: 999px;
  color: #fff;
  background: var(--orange);
  font-weight: 800;
}

.hero {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  color: #fff;
  background: #111922;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9,17,25,.92), rgba(9,17,25,.62) 48%, rgba(9,17,25,.2)),
    url("https://images.unsplash.com/photo-1519003722824-194d4455a60c?auto=format&fit=crop&w=1800&q=80") center/cover;
  transform: scale(1.02);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 116px 0 72px;
}
.eyebrow {
  display: inline-flex;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(242,107,33,.18);
  border: 1px solid rgba(255,255,255,.22);
  color: #ffd7bd;
  font-weight: 800;
}
.hero h1 {
  max-width: 790px;
  margin: 24px 0 22px;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}
.lead {
  max-width: 680px;
  font-size: 19px;
  color: rgba(255,255,255,.82);
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 34px; }
.btn {
  min-width: 142px;
  height: 50px;
  padding: 0 26px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}
.btn.primary { background: var(--orange); color: #fff; }
.btn.ghost { border: 1px solid rgba(255,255,255,.46); color: #fff; }
.hero-stats {
  margin-top: 74px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 180px));
  gap: 28px;
}
.hero-stats div {
  padding-left: 18px;
  border-left: 4px solid var(--orange);
}
.hero-stats strong { display: block; font-size: 32px; line-height: 1; }
.hero-stats span { color: rgba(255,255,255,.72); font-size: 14px; }

.section { padding: 90px 0; }
.section-head { text-align: center; margin-bottom: 42px; }
.section-head span,
.about-copy span,
.contact span {
  color: var(--orange);
  text-transform: uppercase;
  font-weight: 900;
  letter-spacing: 1px;
}
.section-head h2,
.about-copy h2,
.contact h2 {
  margin: 6px 0 10px;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.16;
}
.section-head p { max-width: 700px; margin: 0 auto; color: var(--muted); }
.section-head.light { color: #fff; }
.section-head.light p { color: rgba(255,255,255,.7); }

.services { background: #fff; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.service-card {
  min-height: 260px;
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 26px rgba(20,32,42,.04);
  transition: transform .2s ease, box-shadow .2s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.icon {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 900;
  font-size: 24px;
  background: linear-gradient(135deg, var(--orange), #ffb35b);
}
.service-card h3 { margin: 24px 0 10px; font-size: 22px; }
.service-card p { margin: 0; color: var(--muted); }

.about { background: #f3f5f7; }
.about-grid {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 56px;
  align-items: center;
}
.about-media {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.about-media img {
  width: 100%;
  height: 470px;
  object-fit: cover;
}
.about-copy p { color: var(--muted); margin: 0 0 16px; }
.about-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.about-list span {
  padding: 14px 16px;
  background: #fff;
  border-left: 4px solid var(--orange);
  font-weight: 800;
}

.advantages {
  color: #fff;
  background:
    linear-gradient(120deg, rgba(14,25,33,.95), rgba(14,25,33,.86)),
    url("https://images.unsplash.com/photo-1504917595217-d4dc5ebe6122?auto=format&fit=crop&w=1800&q=80") center/cover fixed;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.adv-item {
  min-height: 230px;
  padding: 30px 24px;
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
}
.adv-item strong { color: #ffb06f; font-size: 34px; }
.adv-item h3 { margin: 20px 0 10px; font-size: 22px; }
.adv-item p { margin: 0; color: rgba(255,255,255,.72); }

.scenes { background: #fff; }
.scene-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr;
  grid-template-rows: repeat(2, minmax(180px, auto));
  gap: 22px;
}
.scene {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  background: #eef3f0;
  padding: 32px;
}
.scene.large {
  grid-row: span 2;
  min-height: 420px;
  padding: 0;
}
.scene-project {
  background:
    linear-gradient(180deg, rgba(18, 29, 38, .08), rgba(18, 29, 38, .42)),
    url("/assets/scenario-aggregate-yard.png?v=20260706") center/cover;
}
.scene.large div {
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 28px;
  padding: 22px;
  color: #fff;
  background: rgba(15, 24, 31, .72);
  backdrop-filter: blur(10px);
}
.scene h3 { margin: 0 0 10px; font-size: 24px; }
.scene p { margin: 0; color: var(--muted); }
.scene.large p { color: rgba(255,255,255,.78); }

.contact {
  background:
    linear-gradient(90deg, #fff 0 55%, #fff3ec 55% 100%);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 430px;
  gap: 52px;
  align-items: start;
}
.contact p { color: var(--muted); max-width: 620px; }
.contact-cards {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
.contact-cards div {
  padding: 18px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.contact-cards b { display: block; color: var(--muted); font-size: 14px; }
.contact-cards strong { font-size: 20px; }
.message-form {
  padding: 30px;
  background: #fff;
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.message-form input,
.message-form textarea {
  width: 100%;
  margin-bottom: 14px;
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  outline: none;
}
.message-form input:focus,
.message-form textarea:focus { border-color: var(--orange); }
.message-form button {
  width: 100%;
  height: 50px;
  border: 0;
  border-radius: 6px;
  background: var(--orange);
  color: #fff;
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.footer { background: #111922; color: #fff; }
.footer-inner {
  padding: 42px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.footer p { margin: 4px 0 0; color: rgba(255,255,255,.62); }
.footer-links { display: flex; gap: 24px; color: rgba(255,255,255,.76); }
.copyright {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 16px 20px;
  text-align: center;
  color: rgba(255,255,255,.5);
  font-size: 14px;
}
.copyright a { color: rgba(255,255,255,.7); }

@media (max-width: 1100px) {
  .nav-inner { min-height: auto; padding: 14px 0; }
  .nav-links, .nav-cta { display: none; }
  .hero { min-height: auto; }
  .hero-content { padding: 80px 0 54px; }
  .hero-stats, .service-grid, .adv-grid, .about-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .scene-grid { grid-template-columns: 1fr; grid-template-rows: auto; }
  .about-media img { height: 320px; }
}

@media (max-width: 620px) {
  .wrap { width: min(100% - 28px, 1180px); }
  .topbar-inner { height: auto; padding: 8px 0; align-items: flex-start; flex-direction: column; gap: 2px; }
  .brand strong { font-size: 20px; }
  .brand-logo-box { width: 46px; height: 46px; flex-basis: 46px; }
  .hero h1 { font-size: 38px; }
  .lead { font-size: 16px; }
  .hero-stats { gap: 16px; margin-top: 44px; }
  .section { padding: 62px 0; }
  .service-card { min-height: auto; }
  .about-list { grid-template-columns: 1fr; }
  .contact { background: #fff; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
  .footer-links { flex-wrap: wrap; gap: 14px 20px; }
}