:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-soft: #ebf0f8;
  --text: #16233f;
  --muted: #62708d;
  --line: #d9e2f0;
  --navy: #0b1d3a;
  --navy-deep: #081329;
  --blue: #1565d8;
  --blue-soft: #dfeafe;
  --orange: #e8590c;
  --orange-soft: #fff1e9;
  --green: #14795b;
  --green-soft: #e6f6f0;
  --shadow: 0 18px 48px rgba(11, 29, 58, 0.10);
  --radius: 18px;
  --radius-sm: 12px;
}

*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: "Inter", "Segoe UI", system-ui, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(21, 101, 216, 0.10), transparent 30%),
    linear-gradient(180deg, #f8faff 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.65;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.page-shell { min-height: 100vh; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(8, 19, 41, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.topbar-inner,
.hero-inner,
.section-inner,
.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .9rem;
  color: #fff;
}

.brand img {
  width: 122px;
  height: auto;
  filter: brightness(0) saturate(0) invert(1);
}

.brand-copy {
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(255,255,255,.55);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: rgba(255,255,255,.74);
  font-size: .9rem;
  font-weight: 600;
  padding: .55rem .8rem;
  border-radius: 999px;
  transition: .2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(255,255,255,.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.nav-chip {
  color: rgba(255,255,255,.78);
  font-size: .82rem;
  font-weight: 600;
}

.btn-primary,
.btn-secondary,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  border-radius: 999px;
  padding: .85rem 1.2rem;
  font-size: .92rem;
  font-weight: 700;
  transition: .2s ease;
}

.btn-primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 10px 26px rgba(232, 89, 12, .22);
}

.btn-primary:hover { background: #ff6c1b; transform: translateY(-1px); }

.btn-secondary {
  background: var(--navy);
  color: #fff;
}

.btn-secondary:hover { background: #12336c; }

.btn-ghost {
  background: var(--surface);
  color: var(--navy);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: rgba(21, 101, 216, .3);
  color: var(--blue);
}

.hero {
  padding: 52px 0 34px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 1.5rem;
}

.hero-copy,
.hero-panel {
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-copy {
  background:
    linear-gradient(135deg, rgba(11, 29, 58, 0.98), rgba(20, 48, 94, 0.94)),
    url("pictures/hero-bg.webp") center/cover no-repeat;
  color: #fff;
  padding: 2.6rem;
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(232,89,12,.28), transparent 65%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .38rem .8rem;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .72rem;
  font-weight: 800;
  color: #ffb48a;
  margin-bottom: 1.15rem;
}

.hero-title {
  font-size: clamp(2.2rem, 4vw, 4.2rem);
  line-height: 1.02;
  font-weight: 900;
  margin-bottom: 1rem;
  max-width: 12ch;
}

.hero-title .accent { color: #7eb7ff; }

.hero-lead {
  color: rgba(255,255,255,.76);
  font-size: 1.02rem;
  max-width: 58ch;
  margin-bottom: 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .8rem;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .8rem;
  margin-top: 1.7rem;
}

.metric {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.11);
  border-radius: var(--radius);
  padding: 1rem;
}

.metric strong {
  display: block;
  font-size: 1.7rem;
  line-height: 1;
  margin-bottom: .35rem;
}

.metric span {
  color: rgba(255,255,255,.68);
  font-size: .8rem;
}

.hero-panel {
  background: linear-gradient(180deg, #fff 0%, #f7f9fe 100%);
  padding: 1.4rem;
  border: 1px solid rgba(11,29,58,.06);
}

.hero-panel h3 {
  font-size: .88rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 1rem;
}

.stack-list {
  display: grid;
  gap: .85rem;
}

.stack-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1rem 1rem 1.1rem;
  position: relative;
}

.stack-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--orange), var(--blue));
}

.stack-card strong {
  display: block;
  font-size: 1rem;
  margin-bottom: .2rem;
}

.stack-card p {
  color: var(--muted);
  font-size: .88rem;
}

.section {
  padding: 28px 0 44px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1.5rem;
  margin-bottom: 1.3rem;
}

.section-title {
  font-size: clamp(1.6rem, 2.8vw, 2.4rem);
  line-height: 1.06;
  margin-bottom: .45rem;
}

.section-sub {
  color: var(--muted);
  max-width: 62ch;
  font-size: .96rem;
}

.grid-3,
.grid-2 {
  display: grid;
  gap: 1rem;
}

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card {
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 1.35rem;
  box-shadow: var(--shadow);
}

.card.soft {
  background: linear-gradient(180deg, #ffffff 0%, #f8faff 100%);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-bottom: .9rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: .34rem .68rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .04em;
}

.tag.orange { background: var(--orange-soft); color: var(--orange); }
.tag.blue { background: var(--blue-soft); color: var(--blue); }
.tag.green { background: var(--green-soft); color: var(--green); }

.card h3 {
  font-size: 1.18rem;
  line-height: 1.15;
  margin-bottom: .55rem;
}

.card p {
  color: var(--muted);
  font-size: .9rem;
}

.card-list {
  display: grid;
  gap: .55rem;
  margin-top: 1rem;
}

.card-list div {
  display: flex;
  gap: .65rem;
  color: var(--text);
  font-size: .88rem;
}

.card-list div::before {
  content: "";
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: 999px;
  margin-top: .5rem;
  background: var(--orange);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.15rem;
}

.outline-link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  color: var(--navy);
  font-weight: 700;
  font-size: .88rem;
}

.outline-link:hover { color: var(--blue); }

.feature-split {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 1rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 1rem;
}

.article-body {
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: 26px;
  padding: 1.6rem;
  box-shadow: var(--shadow);
}

.article-body h2 {
  font-size: 1.2rem;
  margin: 1.4rem 0 .7rem;
}

.article-body p,
.article-body li {
  color: var(--muted);
  font-size: .95rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.2rem;
  display: grid;
  gap: .55rem;
}

.article-body .notice,
.article-body .danger,
.article-body .success {
  border-radius: 18px;
  padding: 1rem 1.1rem;
  margin: 1rem 0;
  border: 1px solid var(--line);
}

.article-body .notice { background: var(--blue-soft); }
.article-body .danger { background: #fff0ef; border-color: #ffd5d0; }
.article-body .success { background: var(--green-soft); border-color: #cfeedd; }

.sidebar {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.sidebar-card {
  background: rgba(255,255,255,.92);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.sidebar-card h4 {
  font-size: .9rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
  margin-bottom: .85rem;
}

.sidebar-links {
  display: grid;
  gap: .65rem;
}

.sidebar-links a {
  padding: .75rem .9rem;
  border-radius: 16px;
  background: var(--surface-soft);
  color: var(--text);
  font-size: .88rem;
  font-weight: 700;
}

.sidebar-links a:hover {
  background: var(--blue-soft);
  color: var(--blue);
}

.steps {
  display: grid;
  gap: .85rem;
  margin-top: 1rem;
}

.step {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: .8rem;
  align-items: start;
  padding: 1rem;
  border-radius: 18px;
  background: #f8fbff;
  border: 1px solid var(--line);
}

.step-index {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: #fff;
  font-weight: 900;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table th,
.spec-table td {
  padding: .9rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr) 290px;
  gap: 1rem;
}

.filter-panel,
.buyer-panel {
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
  align-self: start;
}

.filter-panel {
  position: sticky;
  top: 92px;
}

.buyer-panel {
  position: sticky;
  top: 92px;
}

.panel-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .9rem;
}

.panel-title h3 {
  font-size: .92rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--muted);
}

.filter-group {
  padding-top: .9rem;
  margin-top: .9rem;
  border-top: 1px solid var(--line);
}

.filter-group h4 {
  font-size: .84rem;
  margin-bottom: .7rem;
  color: var(--text);
}

.chip-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .48rem .78rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-size: .78rem;
  font-weight: 700;
  color: var(--muted);
}

.chip.active {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
}

.chip.soft {
  background: var(--surface-soft);
}

.search-box {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .88rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  color: var(--text);
  font: inherit;
}

.mini-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
  margin-bottom: 1rem;
}

.mini-stat {
  padding: .95rem;
  border-radius: 20px;
  background: linear-gradient(180deg, #fff 0%, #f7faff 100%);
  border: 1px solid var(--line);
}

.mini-stat strong {
  display: block;
  font-size: 1.35rem;
  margin-bottom: .18rem;
}

.mini-stat span {
  color: var(--muted);
  font-size: .76rem;
}

.product-stack {
  display: grid;
  gap: 1rem;
}

.catalog-card {
  background: rgba(255,255,255,.94);
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.catalog-visual {
  min-height: 180px;
  background:
    linear-gradient(135deg, rgba(11,29,58,.98), rgba(21,101,216,.86)),
    url("pictures/hero-bg.webp") center/cover no-repeat;
  padding: 1rem;
  display: flex;
  align-items: end;
}

.catalog-visual span {
  display: inline-flex;
  align-items: center;
  padding: .4rem .7rem;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: .78rem;
  font-weight: 800;
}

.catalog-body {
  padding: 1.1rem;
}

.catalog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-bottom: .75rem;
}

.catalog-meta span {
  padding: .3rem .6rem;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: .74rem;
  font-weight: 800;
}

.catalog-body h3 {
  font-size: 1.04rem;
  margin-bottom: .45rem;
}

.catalog-body p {
  color: var(--muted);
  font-size: .88rem;
}

.product-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 1rem;
  background: rgba(255,255,255,.96);
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.product-card .catalog-visual {
  min-height: 100%;
}

.product-copy {
  padding: 1.1rem 1.1rem 1.1rem 0;
}

.sku-row {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: wrap;
  margin-bottom: .7rem;
}

.sku {
  display: inline-flex;
  align-items: center;
  padding: .34rem .62rem;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--navy);
  font-size: .75rem;
  font-weight: 800;
}

.product-copy h3 {
  font-size: 1.18rem;
  margin-bottom: .45rem;
}

.product-copy p {
  color: var(--muted);
  font-size: .9rem;
}

.spec-pills {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .9rem;
}

.spec-pills span {
  padding: .38rem .62rem;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: .75rem;
  font-weight: 800;
}

.price-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.price-box strong {
  display: block;
  font-size: 1rem;
  color: var(--text);
}

.price-box span {
  color: var(--muted);
  font-size: .78rem;
}

.line-items {
  display: grid;
  gap: .7rem;
}

.line-item {
  padding: .85rem .9rem;
  border-radius: 18px;
  background: linear-gradient(180deg, #fff 0%, #f7faff 100%);
  border: 1px solid var(--line);
}

.line-item strong {
  display: block;
  margin-bottom: .2rem;
  font-size: .92rem;
}

.line-item span {
  display: block;
  color: var(--muted);
  font-size: .78rem;
}

.process-list {
  display: grid;
  gap: .7rem;
}

.process-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: .75rem;
  padding: .9rem;
  border-radius: 18px;
  background: #fff;
  border: 1px solid var(--line);
}

.process-step b {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--navy);
  color: #fff;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.compare-card {
  border-radius: 24px;
  padding: 1.2rem;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow);
}

.compare-card.highlight {
  background: linear-gradient(180deg, #eef5ff 0%, #ffffff 100%);
  border-color: rgba(21,101,216,.28);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: .9rem;
  padding: .38rem .68rem;
  border-radius: 999px;
  font-size: .76rem;
  font-weight: 800;
}

.status-pill.green { background: var(--green-soft); color: var(--green); }
.status-pill.orange { background: var(--orange-soft); color: var(--orange); }

.cta-banner {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 1rem;
  background: linear-gradient(135deg, #081329, #103c82);
  color: #fff;
  border-radius: 28px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.cta-banner p { color: rgba(255,255,255,.72); }

.footer {
  padding: 10px 0 40px;
}

.footer-card {
  background: #0b1d3a;
  color: rgba(255,255,255,.72);
  border-radius: 28px;
  padding: 1.35rem 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

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

@media (max-width: 1080px) {
  .hero-inner,
  .feature-split,
  .article-layout,
  .cta-banner,
  .catalog-layout,
  .compare-grid,
  .catalog-grid,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .filter-panel,
  .buyer-panel {
    position: static;
  }
}

@media (max-width: 860px) {
  .topbar-inner {
    padding: .8rem 0;
    align-items: start;
    flex-direction: column;
  }

  .nav-links,
  .nav-actions {
    width: 100%;
  }

  .hero-copy,
  .hero-panel,
  .article-body,
  .sidebar-card,
  .card,
  .catalog-card,
  .footer-card {
    border-radius: 22px;
  }

  .hero-copy { padding: 1.5rem; }
  .hero-metrics,
  .grid-2 { grid-template-columns: 1fr; }

  .mini-stat-grid,
  .product-card {
    grid-template-columns: 1fr;
  }

  .product-copy {
    padding: 0 1rem 1rem;
  }
}