:root {
  --bng-pine: #0e3f34;
  --bng-pine-2: #145744;
  --bng-leaf: #1f7a58;
  --bng-gold: #e2b15a;
  --bng-gold-2: #f6e2bc;
  --bng-mist: #eef4f0;
  --bng-paper: #ffffff;
  --bng-ink: #14241e;
  --bng-muted: #4e6259;
  --bng-line: #d3e2da;
  --bng-max: 72rem;
  --bng-sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--bng-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--bng-ink);
  background:
    linear-gradient(180deg, #f7fbf8 0%, var(--bng-mist) 220px);
}

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

a {
  color: var(--bng-leaf);
  text-underline-offset: 3px;
}

a:hover {
  color: var(--bng-pine);
}

h1,
h2,
h3 {
  font-weight: 750;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.bng-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.bng-skip {
  position: absolute;
  left: -999px;
}

.bng-skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 80;
  background: #fff;
  color: var(--bng-pine);
  padding: 0.45rem 0.75rem;
  border-radius: 8px;
}

.bng-top {
  background: var(--bng-pine);
  color: #f4faf6;
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 4px solid var(--bng-gold);
}

.bng-top__row {
  max-width: var(--bng-max);
  margin: 0 auto;
  padding: 0.75rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
}

.bng-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: #fff;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.03em;
}

.bng-logo img {
  width: 36px;
  height: 36px;
}

.bng-toggle {
  display: none;
  margin-left: auto;
  border: 0;
  background: var(--bng-gold);
  color: var(--bng-pine);
  border-radius: 8px;
  padding: 0.4rem 0.8rem;
  font-weight: 750;
  cursor: pointer;
}

.bng-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.85rem;
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
  align-items: center;
}

.bng-nav a {
  color: #d7ebe2;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 650;
}

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

.bng-nav__in {
  background: var(--bng-gold);
  color: var(--bng-pine) !important;
  border-radius: 8px;
  padding: 0.4rem 0.8rem;
}

.bng-nav__in:hover,
.bng-nav a.bng-nav__in[aria-current="page"] {
  background: var(--bng-gold-2);
  color: var(--bng-pine) !important;
}

.bng-main {
  width: min(var(--bng-max), calc(100% - 2.2rem));
  margin: 0 auto;
  padding: 1.4rem 0 3rem;
  flex: 1;
}

.bng-hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.2rem;
  align-items: center;
  background: var(--bng-paper);
  border: 1px solid var(--bng-line);
  border-radius: 18px;
  padding: 1.3rem;
  box-shadow: 0 16px 40px rgba(14, 63, 52, 0.06);
}

.bng-hero h1 {
  margin: 0.2rem 0 0.7rem;
  font-size: clamp(1.9rem, 3.4vw, 2.8rem);
  color: var(--bng-pine);
}

.bng-lead,
.bng-intro p {
  color: var(--bng-muted);
  margin: 0 0 1rem;
}

.bng-pill {
  display: inline-block;
  margin: 0;
  background: var(--bng-gold-2);
  color: var(--bng-pine);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.bng-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.bng-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0.68rem 1rem;
  font-weight: 750;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font: inherit;
}

.bng-btn--pine {
  background: var(--bng-pine);
  color: #fff;
}

.bng-btn--pine:hover {
  background: var(--bng-pine-2);
  color: #fff;
}

.bng-btn--line {
  background: #fff;
  color: var(--bng-pine);
  border-color: var(--bng-line);
}

.bng-btn--line:hover {
  border-color: var(--bng-leaf);
  color: var(--bng-pine);
}

.bng-hero__pic img,
.bng-frame img {
  width: 100%;
  border-radius: 12px;
  background: #f3f8f5;
}

.bng-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
  margin: 1rem 0 0.2rem;
  background: var(--bng-pine);
  color: #f4faf6;
  border-radius: 16px;
  padding: 0.9rem;
}

.bng-band article {
  padding: 0.35rem 0.6rem;
}

.bng-band b {
  display: block;
  color: var(--bng-gold);
  font-size: 1.25rem;
}

.bng-band span {
  font-size: 0.88rem;
  color: #d5e8df;
}

.bng-block {
  margin: 1.6rem 0;
}

.bng-block h2,
.bng-intro h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(1.45rem, 2.4vw, 1.9rem);
  color: var(--bng-pine);
}

.bng-grid {
  display: grid;
  gap: 0.85rem;
}

.bng-grid--2 { grid-template-columns: 1fr 1fr; }
.bng-grid--3 { grid-template-columns: repeat(3, 1fr); }
.bng-grid--4 { grid-template-columns: repeat(4, 1fr); }

.bng-tile,
.bng-panel,
.bng-form {
  background: var(--bng-paper);
  border: 1px solid var(--bng-line);
  border-radius: 14px;
  padding: 1rem 1.05rem 1.1rem;
}

.bng-tile h2,
.bng-tile h3,
.bng-panel h2,
.bng-form h2 {
  margin: 0.35rem 0 0.4rem;
  color: var(--bng-pine);
}

.bng-tile p,
.bng-panel p,
.bng-form p,
.bng-tile li,
.bng-panel li {
  color: var(--bng-muted);
}

.bng-tile p,
.bng-panel p {
  margin: 0.3rem 0 0;
}

.bng-tile--go {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  text-decoration: none;
  color: inherit;
  min-height: 100%;
  border-left: 4px solid var(--bng-gold);
}

.bng-tile--go:hover {
  border-left-color: var(--bng-leaf);
  color: inherit;
}

.bng-tile__more {
  margin-top: auto;
  color: var(--bng-leaf);
  font-weight: 750;
  font-size: 0.92rem;
}

.bng-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 1rem;
  align-items: center;
}

.bng-bars {
  display: grid;
  gap: 0.7rem;
}

.bng-bars__row {
  display: grid;
  grid-template-columns: 8.5rem 1fr auto;
  gap: 0.55rem;
  align-items: center;
  font-size: 0.92rem;
}

.bng-bars__track {
  height: 0.7rem;
  background: #e3eee8;
  border-radius: 999px;
  overflow: hidden;
}

.bng-bars__track span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--bng-leaf), var(--bng-gold));
}

.bng-ringwrap {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.bng-ring {
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: conic-gradient(var(--bng-gold) 0 78%, #d7e6de 0);
  display: grid;
  place-items: center;
  flex: none;
}

.bng-ring span {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: var(--bng-pine);
  font-size: 1.35rem;
}

.bng-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.bng-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  background: #fff;
  border: 1px solid var(--bng-line);
  border-radius: 12px;
  padding: 0.85rem 0.95rem;
}

.bng-steps b {
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--bng-pine);
  color: var(--bng-gold);
}

.bng-steps h3 {
  margin: 0;
  font-size: 1.02rem;
}

.bng-steps p {
  margin: 0.2rem 0 0;
  color: var(--bng-muted);
}

.bng-tablewrap {
  overflow-x: auto;
  border: 1px solid var(--bng-line);
  border-radius: 12px;
  background: #fff;
}

.bng-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 36rem;
}

.bng-table th,
.bng-table td {
  text-align: left;
  padding: 0.72rem 0.85rem;
  border-bottom: 1px solid var(--bng-line);
  vertical-align: top;
}

.bng-table th {
  background: #f4faf6;
  color: var(--bng-pine);
}

.bng-table caption {
  caption-side: bottom;
  padding: 0.6rem;
  color: var(--bng-muted);
  font-size: 0.85rem;
}

.bng-faq details {
  background: #fff;
  border: 1px solid var(--bng-line);
  border-radius: 12px;
  padding: 0.75rem 0.95rem;
  margin: 0 0 0.55rem;
}

.bng-faq summary {
  cursor: pointer;
  font-weight: 750;
  color: var(--bng-pine);
}

.bng-faq p {
  color: var(--bng-muted);
  margin: 0.5rem 0 0.15rem;
}

.bng-crumbs {
  color: var(--bng-muted);
  font-size: 0.88rem;
  margin: 0 0 0.75rem;
}

.bng-crumbs a {
  text-decoration: none;
}

.bng-intro {
  margin-bottom: 1rem;
}

.bng-num {
  margin: 0.2rem 0 0.6rem;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--bng-pine);
  letter-spacing: -0.04em;
}

.bng-callout {
  background: var(--bng-pine);
  color: #f4faf6;
  border-radius: 14px;
  padding: 1.1rem 1.15rem;
  border-left: 6px solid var(--bng-gold);
}

.bng-callout a {
  color: var(--bng-gold-2);
}

.bng-callout h2,
.bng-callout p {
  margin: 0 0 0.4rem;
}

.bng-callout p:last-child {
  margin: 0;
}

.bng-form label {
  display: block;
  font-weight: 700;
  margin: 0.7rem 0 0.28rem;
}

.bng-form input,
.bng-form select,
.bng-form textarea {
  width: 100%;
  border: 1px solid var(--bng-line);
  background: #fff;
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
  color: var(--bng-ink);
}

.bng-alert {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.75rem;
  border-radius: 8px;
  background: #fff4e4;
  color: #7a5314;
}

.bng-alert--ok {
  background: #e5f6ee;
  color: #0e5b3d;
}

.bng-marks {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
  align-items: center;
}

.bng-marks img {
  background: #fff;
  border-radius: 8px;
  padding: 0.2rem 0.35rem;
}

.bng-foot {
  background: #0b2e27;
  color: #d5e4dc;
  margin-top: auto;
}

.bng-foot a {
  color: #f6f3ea;
  text-decoration: none;
}

.bng-foot a:hover {
  color: var(--bng-gold);
}

.bng-foot__grid {
  max-width: var(--bng-max);
  margin: 0 auto;
  padding: 1.6rem 1.2rem 0.8rem;
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 1.1rem;
}

.bng-foot h2 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: #fff;
}

.bng-foot ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bng-foot li {
  margin: 0.28rem 0;
}

.bng-foot__fine {
  max-width: var(--bng-max);
  margin: 0 auto;
  padding: 0 1.2rem 1.2rem;
  color: #9eb4aa;
  font-size: 0.88rem;
}

.bng-notice {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 70;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  border: 1px solid var(--bng-line);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  box-shadow: 0 12px 30px rgba(14, 63, 52, 0.12);
}

.bng-notice p {
  margin: 0;
}

.bng-notice__acts {
  display: flex;
  gap: 0.4rem;
}

@media (max-width: 980px) {
  .bng-toggle { display: inline-flex; }
  .bng-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #fff;
    border-bottom: 1px solid var(--bng-line);
    padding: 0.7rem 1rem 1rem;
  }
  .bng-nav--open { display: block; }
  .bng-nav ul {
    margin: 0;
    flex-direction: column;
    align-items: flex-start;
  }
  .bng-nav a {
    color: var(--bng-pine);
  }
  .bng-hero,
  .bng-split,
  .bng-grid--4,
  .bng-grid--3,
  .bng-band,
  .bng-foot__grid {
    grid-template-columns: 1fr 1fr;
  }
  .bng-hero,
  .bng-split,
  .bng-foot__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .bng-main { width: min(100% - 1.2rem, var(--bng-max)); }
  .bng-grid--2,
  .bng-grid--3,
  .bng-grid--4,
  .bng-band,
  .bng-bars__row {
    grid-template-columns: 1fr;
  }
  .bng-notice { flex-direction: column; align-items: stretch; }
}