:root {
  --bg: #f4f7f6;
  --bg-alt: #e8f0ee;
  --ink: #16302c;
  --muted: #4d6661;
  --line: #c9d8d3;
  --brand: #0d4f4f;
  --brand-deep: #083837;
  --accent: #c97b2c;
  --card: #ffffff;
  --shadow: 0 18px 40px rgba(8, 56, 55, 0.08);
  --radius: 18px;
  --max: 1120px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}
.narrow { width: min(820px, calc(100% - 40px)); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244, 247, 246, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(201, 216, 211, 0.8);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 74px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, #146868, var(--brand-deep));
  color: #fff;
  font-weight: 700;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-text strong { font-size: 17px; }
.brand-text small {
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}
.nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
  font-size: 15px;
}
.nav a:hover { color: var(--brand); }
.header-cta {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(201, 123, 44, 0.18), transparent 28%),
    radial-gradient(circle at 85% 10%, rgba(13, 79, 79, 0.18), transparent 32%),
    linear-gradient(180deg, #eef5f3 0%, #f4f7f6 55%, #f4f7f6 100%);
}
.hero-bg::after {
  content: "";
  position: absolute;
  right: -80px;
  top: 40px;
  width: 420px;
  height: 420px;
  border-radius: 40% 60% 55% 45%;
  background:
    linear-gradient(145deg, rgba(13, 79, 79, 0.16), rgba(201, 123, 44, 0.12)),
    repeating-linear-gradient(
      -18deg,
      rgba(22, 48, 44, 0.05) 0 2px,
      transparent 2px 14px
    );
}
.hero-content { position: relative; max-width: 720px; }
.eyebrow {
  display: inline-block;
  margin: 0 0 16px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(13, 79, 79, 0.08);
  color: var(--brand);
  font-size: 13px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.hero-lead {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 620px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 12px;
  font-weight: 600;
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.7);
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 14px;
}
.hero-points li::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.section { padding: 78px 0; }
.section-alt { background: var(--bg-alt); }
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}
.section-head.left {
  text-align: left;
  margin-left: 0;
}
.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: -0.02em;
}
.section-head p {
  margin: 0;
  color: var(--muted);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.service-card {
  background: var(--card);
  border: 1px solid rgba(201, 216, 211, 0.9);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.service-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: rgba(13, 79, 79, 0.08);
  color: var(--brand);
  font-weight: 700;
}
.service-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}
.service-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.capability-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}
.capability {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--line);
}
.capability h3 { margin: 0 0 10px; }
.capability p { margin: 0; color: var(--muted); }
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.process-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(13, 79, 79, 0.06);
}
.process-step span {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 28px;
  align-items: start;
}
.about-text {
  color: var(--muted);
  font-size: 16px;
}
.info-list {
  margin: 28px 0 0;
}
.info-list > div {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}
.info-list dt {
  color: var(--muted);
  font-size: 14px;
}
.info-list dd {
  margin: 0;
  font-weight: 600;
}
.about-panel,
.contact-card {
  background: var(--brand-deep);
  color: #edf5f3;
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.about-panel h3,
.contact-card h3 {
  margin: 0 0 16px;
  font-size: 22px;
}
.about-panel ul {
  margin: 0;
  padding-left: 18px;
}
.about-panel li + li { margin-top: 8px; }
.panel-note,
.tiny {
  margin: 18px 0 0;
  color: rgba(237, 245, 243, 0.72);
  font-size: 13px;
}
.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.contact-list li {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.contact-list span {
  color: var(--muted);
  font-size: 13px;
}
.contact-list a,
.contact-list strong {
  font-size: 17px;
}
.contact-card .btn-primary {
  margin-top: 8px;
  background: var(--accent);
  color: #fff;
}
.contact-card p:first-of-type {
  margin-top: 0;
  color: rgba(237, 245, 243, 0.86);
}

.site-footer {
  padding: 36px 0 48px;
  background: #102826;
  color: rgba(237, 245, 243, 0.86);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 1.2fr;
  gap: 24px;
}
.site-footer strong { color: #fff; }
.site-footer p { margin: 8px 0 0; font-size: 14px; }
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a:hover { color: #fff; }
.footer-meta p { margin: 0 0 8px; }

.page {
  padding: 56px 0 80px;
}
.page h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 5vw, 42px);
}
.page h2 {
  margin: 36px 0 12px;
  font-size: 24px;
}
.lead {
  color: var(--muted);
  font-size: 17px;
}
.info-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
}
.info-table th,
.info-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.info-table th {
  width: 160px;
  color: var(--muted);
  font-weight: 500;
  background: rgba(13, 79, 79, 0.04);
}
.info-table tr:last-child th,
.info-table tr:last-child td { border-bottom: 0; }
.plain-list {
  padding-left: 20px;
  color: var(--muted);
}
.plain-list li + li { margin-top: 8px; }
.page-back { margin-top: 40px; }
.page-back a {
  color: var(--brand);
  font-weight: 600;
}

@media (max-width: 900px) {
  .nav, .header-cta { display: none; }
  .service-grid,
  .capability-row,
  .process,
  .about-grid,
  .contact-grid,
  .footer-inner {
    grid-template-columns: 1fr;
  }
  .info-list > div {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .hero { padding-top: 56px; }
}