:root {
  --ink: #1d2d38;
  --muted: #617380;
  --accent: #199bb0;
  --accent-soft: rgba(25, 155, 176, 0.08);
  --leaf: #618e57;
  --line: #d8e4ea;
  --line-strong: #c8d7de;
  --surface: #ffffff;
  --band: #f6fbfc;
  --shadow: 0 18px 36px rgba(17, 34, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(25, 155, 176, 0.08), transparent 30%),
    linear-gradient(180deg, #fbfdfe 0%, #ffffff 24%, #fbfdfe 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 253, 254, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(216, 228, 234, 0.92);
}

.header-row,
.footer-row {
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
}

.brand,
.site-footer strong {
  font-size: 1rem;
  font-weight: 800;
}

.footer-brand {
  display: grid;
  gap: 6px;
}

.section-nav,
.header-actions,
.hero-actions,
.download-actions,
.footer-links,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.section-nav {
  justify-content: center;
  align-items: center;
}

.header-actions {
  align-items: center;
}

.section-nav a,
.footer-links a {
  color: var(--muted);
  font-size: 0.95rem;
}

.section-nav a:hover,
.footer-links a:hover {
  color: var(--accent);
}

.contact-chip,
.footer-contact {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1;
}

.contact-chip {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.button {
  min-height: 44px;
  padding: 11px 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 700;
}

.icon-button {
  width: 52px;
  min-width: 52px;
  padding: 0;
}

.icon-button svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.whatsapp-button {
  background: #1f2f3a;
}

.button.ghost {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 48px;
}

.hero-backdrop,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(251, 253, 254, 0.96) 0%, rgba(251, 253, 254, 0.92) 50%, rgba(251, 253, 254, 0.75) 100%),
    linear-gradient(180deg, rgba(251, 253, 254, 0.2), rgba(251, 253, 254, 0.94));
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 420px);
  gap: 48px;
  align-items: center;
}

.eyebrow,
.section-number {
  margin: 0;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  text-transform: uppercase;
}

.section-number {
  margin-bottom: 12px;
}

h1,
h2,
strong,
dt,
dd {
  letter-spacing: 0;
}

h1 {
  margin: 12px 0 0;
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  line-height: 1;
}

h2 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 3vw, 2.8rem);
  line-height: 1.08;
}

.hero-summary,
.section-summary,
.detail-list p,
.download-copy p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-summary {
  max-width: 54ch;
  margin: 20px 0 28px;
  font-size: 1.08rem;
}

.hero-specs,
.spec-list {
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

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

.hero-specs div,
.spec-list div {
  padding: 14px 16px;
  border-top: 1px solid var(--line-strong);
}

.hero-specs dt,
.spec-list dt {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
  text-transform: uppercase;
}

.hero-specs dd,
.spec-list dd {
  margin: 6px 0 0;
  font-size: 1.02rem;
  font-weight: 700;
}

.hero-visual {
  margin: 0;
}

.hero-product-frame,
.panel-frame {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.hero-product-frame {
  padding: 26px;
}

.hero-product-frame img {
  width: 100%;
  filter: drop-shadow(0 20px 28px rgba(18, 33, 40, 0.12));
}

.section-block {
  padding: 56px 0;
}

.soft-band,
.download-band {
  background: linear-gradient(180deg, rgba(25, 155, 176, 0.04), rgba(97, 142, 87, 0.03));
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 36px;
  align-items: center;
}

.section-grid.reverse {
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
}

.section-grid.reverse .section-copy {
  order: 2;
}

.section-grid.reverse .panel-frame {
  order: 1;
}

.section-copy {
  max-width: 500px;
}

.section-summary {
  margin: 18px 0 0;
  font-size: 1rem;
}

.detail-list {
  margin-top: 24px;
  display: grid;
  gap: 16px;
}

.detail-list.compact {
  gap: 14px;
}

.detail-list div {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.detail-list strong {
  display: block;
  font-size: 1.02rem;
}

.detail-list p {
  margin: 8px 0 0;
}

.tag-list {
  margin-top: 24px;
}

.tag-list span {
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
}

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

.panel-frame {
  margin: 0;
  overflow: hidden;
}

.panel-frame img {
  width: 100%;
  height: auto;
}

.download-band {
  padding: 48px 0 56px;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
}

.download-copy {
  max-width: 620px;
}

.site-footer {
  padding: 18px 0 32px;
  border-top: 1px solid rgba(216, 228, 234, 0.92);
  background: rgba(251, 253, 254, 0.92);
}

@media (max-width: 1024px) {
  .header-row,
  .footer-row,
  .hero-grid,
  .section-grid,
  .section-grid.reverse,
  .download-layout {
    grid-template-columns: 1fr;
  }

  .section-nav {
    justify-content: flex-start;
  }

  .section-grid.reverse .section-copy,
  .section-grid.reverse .panel-frame {
    order: initial;
  }

  .hero {
    padding-top: 48px;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .site-header {
    position: static;
  }

  .header-row,
  .footer-row {
    min-height: auto;
    padding: 14px 0;
  }

  .header-row {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .brand {
    text-align: center;
  }

  .section-nav {
    flex-wrap: nowrap;
    justify-content: flex-start;
    overflow-x: auto;
    gap: 18px;
    padding: 2px 2px 6px;
    white-space: nowrap;
    scrollbar-width: none;
  }

  .section-nav::-webkit-scrollbar {
    display: none;
  }

  .section-nav a {
    flex: 0 0 auto;
    font-size: 0.92rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
    flex-wrap: nowrap;
    gap: 10px;
  }

  .contact-chip {
    min-height: 42px;
    flex: 1 1 auto;
    font-size: 0.88rem;
    line-height: 1.25;
  }

  .hero {
    padding: 24px 0 20px;
  }

  .hero-grid {
    gap: 18px;
  }

  .hero-copy {
    order: 2;
  }

  .hero-visual {
    order: 1;
    width: min(100%, 300px);
    margin: 0 auto;
  }

  h1 {
    font-size: 2.45rem;
    line-height: 0.98;
  }

  h2 {
    font-size: 2rem;
  }

  .hero-summary {
    margin: 16px 0 20px;
    font-size: 1rem;
  }

  .hero-specs,
  .spec-list {
    grid-template-columns: 1fr;
  }

  .hero-product-frame {
    padding: 16px;
  }

  .hero-actions,
  .download-actions {
    width: 100%;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .button {
    width: 100%;
  }

  .button {
    min-height: 42px;
  }

  .icon-button {
    width: 42px;
    min-width: 42px;
  }

  .section-grid,
  .section-grid.reverse {
    gap: 18px;
  }

  .section-copy {
    max-width: none;
  }

  .section-summary {
    margin-top: 14px;
  }

  .detail-list,
  .tag-list,
  .spec-list {
    margin-top: 18px;
  }

  .tag-list {
    gap: 10px;
  }

  .tag-list span {
    font-size: 0.88rem;
  }

  .panel-frame {
    border-radius: 6px;
  }

  .section-block {
    padding: 34px 0;
  }

  .footer-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@media (max-width: 480px) {
  .container {
    width: calc(100% - 20px);
  }

  .section-nav {
    gap: 16px;
  }

  .contact-chip {
    font-size: 0.84rem;
  }

  h1 {
    font-size: 2.15rem;
  }

  h2 {
    font-size: 1.8rem;
  }

  .hero-product-frame,
  .hero-specs div,
  .spec-list div {
    padding-left: 14px;
    padding-right: 14px;
  }
}