:root {
  --ink: #182126;
  --muted: #5d6972;
  --teal: #006b6f;
  --teal-dark: #06464a;
  --cyan: #dff7f6;
  --coral: #d95f45;
  --gold: #f2b84b;
  --paper: #ffffff;
  --soft: #f3f7f7;
  --line: #d8e4e4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.72;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(0, 107, 111, .04) 1px, transparent 1px),
    linear-gradient(180deg, #f8fbfb, #edf5f5);
  background-size: 32px 32px, auto;
}

a {
  color: var(--teal);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

.topline {
  padding: 10px 18px;
  color: #fff;
  background: var(--teal-dark);
  text-align: center;
  font-size: 14px;
}

.topline a {
  color: #fff;
  font-weight: 700;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 5vw, 70px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--ink);
  font-weight: 900;
  letter-spacing: 0;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: flex-end;
  font-size: 14px;
}

.nav-links a {
  color: var(--ink);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--coral);
}

.hero {
  padding: clamp(54px, 8vw, 96px) clamp(18px, 5vw, 70px) 44px;
  background:
    radial-gradient(circle at top right, rgba(242, 184, 75, .22), transparent 34%),
    linear-gradient(135deg, #053f43, #00878a);
  color: #fff;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.hero h1 {
  max-width: 980px;
  margin: 0 0 18px;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.04;
}

.hero p {
  margin: 0 0 16px;
  color: rgba(255, 255, 255, .9);
  font-size: 19px;
}

.hero a {
  color: #fff;
}

.hero-image {
  border: 10px solid rgba(255, 255, 255, .18);
  box-shadow: 0 24px 70px rgba(0, 0, 0, .28);
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.quick-links a,
.contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 4px;
  color: #fff;
  background: var(--coral);
  font-weight: 800;
  text-decoration: none;
}

.quick-links a.secondary {
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .5);
}

.page-wrap {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  width: min(1220px, calc(100% - 36px));
  margin: 36px auto 70px;
}

.side-index {
  position: sticky;
  top: 82px;
  align-self: start;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.side-index strong {
  display: block;
  margin-bottom: 12px;
  color: var(--teal-dark);
}

.side-index a {
  display: block;
  margin: 10px 0;
  color: var(--ink);
  text-decoration: none;
}

.side-index a:hover {
  color: var(--coral);
}

.article {
  padding: clamp(24px, 4vw, 44px);
  border-top: 6px solid var(--teal);
  background: var(--paper);
  box-shadow: 0 14px 36px rgba(24, 33, 38, .08);
}

.article h2 {
  margin-top: 42px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--cyan);
  color: var(--teal-dark);
  font-size: clamp(26px, 3vw, 38px);
}

.article h3 {
  color: var(--teal);
}

.article p,
.article li {
  font-size: 17px;
}

.image-section {
  margin: 34px 0;
}

.image-section img {
  width: 100%;
  border: 1px solid var(--line);
  box-shadow: 0 16px 38px rgba(24, 33, 38, .12);
}

.image-caption {
  margin-top: 10px;
  padding-left: 14px;
  border-left: 4px solid var(--gold);
  color: var(--muted);
  font-style: italic;
}

.contact-box {
  margin: 34px 0;
  padding: 28px;
  border: 1px solid rgba(0, 107, 111, .25);
  background: linear-gradient(135deg, #ffffff, #eaf8f7);
}

.contact-box h2 {
  margin-top: 0;
  color: var(--teal-dark);
}

.contact-btn {
  margin: 8px 8px 8px 0;
}

.why-choose {
  margin: 42px 0;
  padding: 28px;
  border-left: 6px solid var(--coral);
  background: #fff7f4;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.link-card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
  text-decoration: none;
}

.link-card strong {
  display: block;
  color: var(--teal-dark);
  font-size: 18px;
}

.link-card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  padding: 34px clamp(18px, 5vw, 70px);
  color: rgba(255, 255, 255, .8);
  background: var(--teal-dark);
}

.site-footer a {
  color: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: #fff;
}

th,
td {
  padding: 13px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--cyan);
}

.simple-page {
  width: min(1040px, calc(100% - 36px));
  margin: 36px auto 70px;
}

.page-shell {
  width: min(1160px, calc(100% - 36px));
  margin: 36px auto 70px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
  align-items: start;
}

.page-card {
  padding: clamp(24px, 4vw, 44px);
  border-top: 6px solid var(--teal);
  background: var(--paper);
  box-shadow: 0 14px 36px rgba(24, 33, 38, .08);
}

.page-card h1 {
  margin: 6px 0 16px;
  color: var(--teal-dark);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
}

.page-card h2 {
  margin-top: 38px;
  color: var(--teal-dark);
}

.lead {
  max-width: 860px;
  color: var(--muted);
  font-size: 19px;
}

.toc {
  position: sticky;
  top: 82px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.toc strong {
  display: block;
  margin-bottom: 12px;
  color: var(--teal-dark);
}

.toc a {
  display: block;
  margin: 10px 0;
  color: var(--ink);
  text-decoration: none;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.card h3 {
  margin-top: 0;
  color: var(--teal-dark);
}

.note {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 5px solid var(--gold);
  background: #fffaf0;
}

.contact-panel {
  padding: 28px;
  margin: 28px 0;
  color: #fff;
  background: var(--teal-dark);
}

.contact-panel a {
  color: #fff;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: #fff;
}

th,
td {
  padding: 13px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--cyan);
}

@media (max-width: 920px) {
  .site-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-grid,
  .page-wrap,
  .link-grid,
  .split,
  .grid,
  .grid.two {
    grid-template-columns: 1fr;
  }

  .side-index,
  .toc {
    position: static;
  }
}