:root {
  --brand: #0b7d75;
  --brand-dark: #075f59;
  --ink: #17202a;
  --muted: #66717d;
  --line: #e6e9ec;
  --surface: #f5f7f8;
  --white: #fff;
  --shadow: 0 12px 34px rgba(20, 42, 53, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.narrow { max-width: 900px; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(230, 233, 236, .88);
  background: rgba(255, 255, 255, .96);
}
.nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand img { width: auto; height: 52px; object-fit: contain; }
.desktop-nav { display: flex; align-items: center; gap: 4px; }
.desktop-nav a { padding: 25px 15px 22px; color: #3a4650; border-bottom: 3px solid transparent; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--brand); border-bottom-color: var(--brand); }
.mobile-nav { display: none; position: relative; }
.mobile-nav summary { cursor: pointer; color: var(--brand); font-weight: 700; list-style: none; }
.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav nav {
  position: absolute;
  top: 44px;
  right: 0;
  width: 190px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
}
.mobile-nav nav a { display: block; padding: 10px 14px; border-radius: 8px; }
.mobile-nav nav a:hover { color: var(--brand); background: var(--surface); }

.hero-scroller {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  overflow: hidden;
  background: #eef2f3;
}
.hero-track {
  display: flex;
  width: 500%;
  animation: hero-carousel 30s infinite;
}
.hero-scroller:hover .hero-track { animation-play-state: paused; }
.hero-slide { flex: 0 0 20%; }
.hero-slide img { display: block; width: 100%; max-height: 610px; object-fit: cover; }
@keyframes hero-carousel {
  0%, 16% { transform: translateX(0); }
  20%, 36% { transform: translateX(-20%); }
  40%, 56% { transform: translateX(-40%); }
  60%, 76% { transform: translateX(-60%); }
  80%, 96% { transform: translateX(-80%); }
  100% { transform: translateX(0); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-track { animation: none; }
}
.section { padding: 76px 0; }
.section-muted { background: var(--surface); }
.section-heading { margin-bottom: 36px; text-align: center; }
.section-heading span { display: block; color: var(--brand); font-size: 12px; font-weight: 800; letter-spacing: .24em; }
.section-heading h1 { margin: 6px 0 2px; font-size: clamp(28px, 4vw, 40px); line-height: 1.25; }
.section-heading p { color: var(--muted); }
.section-action { margin-top: 34px; text-align: center; }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 7px 22px rgba(20, 42, 53, .05);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-media { display: block; aspect-ratio: 16 / 10; overflow: hidden; background: #eef1f2; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.card:hover .card-media img { transform: scale(1.03); }
.card-placeholder { height: 100%; display: grid; place-items: center; color: #7d8b91; font-weight: 700; letter-spacing: .16em; }
.card-body { padding: 22px; }
.card-body h2 { margin: 0 0 8px; font-size: 21px; }
.card-body p { min-height: 74px; margin: 0 0 14px; color: var(--muted); font-size: 14px; }
.text-link { color: var(--brand); font-weight: 700; }
.lead { color: #495660; font-size: 17px; line-height: 2.1; text-indent: 2em; }
.button {
  display: inline-block;
  padding: 11px 25px;
  border: 1px solid var(--brand);
  border-radius: 999px;
  color: #fff;
  background: var(--brand);
  font-weight: 700;
}
.button:hover { background: var(--brand-dark); }
.button-outline { color: var(--brand); background: transparent; }
.button-outline:hover { color: #fff; }
.button-small { padding: 8px 18px; white-space: nowrap; }

.section-hero {
  min-height: 270px;
  display: grid;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(100deg, rgba(5, 71, 67, .92), rgba(14, 126, 118, .65)),
    url("/assets/upload/image/20180412/1523501459462835.jpg") center/cover;
}
.section-hero p { margin: 0; font-size: 12px; font-weight: 800; letter-spacing: .24em; opacity: .75; }
.section-hero h1 { margin: 5px 0 0; font-size: clamp(30px, 5vw, 48px); line-height: 1.3; }
.section-hero div div { opacity: .86; }

.content { color: #4d5862; font-size: 16px; line-height: 2; }
.content h2, .content h3, .content h4 { color: var(--ink); line-height: 1.5; }
.content img, .content video { margin: 24px auto; border-radius: 8px; }
.content ul, .content ol { padding-left: 1.6em; }
.content table { width: 100%; border-collapse: collapse; }
.content th, .content td { padding: 10px; border: 1px solid var(--line); }
.back-link { margin-top: 42px; padding-top: 20px; border-top: 1px solid var(--line); }
.back-link a { color: var(--brand); font-weight: 700; }

.job-list { display: grid; gap: 18px; }
.job-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
}
.job-card h2 { margin: 0 0 4px; font-size: 22px; }
.job-card p { margin: 0; color: var(--muted); }
.empty-state { padding: 40px 0; text-align: center; }

.site-footer { border-top: 1px solid var(--line); color: #66717d; background: #f6f8f9; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; padding: 54px 0 42px; }
.footer-grid h2 { margin: 0 0 12px; color: #33404a; font-size: 18px; }
.footer-grid p { margin: 4px 0; }
.footer-grid a:hover { color: var(--brand); }
.copyright { padding: 15px 20px; border-top: 1px solid var(--line); text-align: center; font-size: 13px; }

@media (max-width: 900px) {
  .desktop-nav { display: none; }
  .mobile-nav { display: block; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-slide img { min-height: 260px; object-fit: cover; }
}

@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1160px); }
  .nav-row { min-height: 68px; }
  .brand img { height: 44px; max-width: 220px; }
  .section { padding: 54px 0; }
  .card-grid { grid-template-columns: 1fr; }
  .card-body p { min-height: 0; }
  .section-hero { min-height: 220px; }
  .job-card { align-items: flex-start; flex-direction: column; gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; padding: 42px 0 34px; }
}