:root {
  --bg: #ffffff;
  --surface: #f4faf8;
  --surface-strong: #e7f4ef;
  --text: #102326;
  --muted: #5d6f70;
  --line: #dce8e5;
  --accent: #11856f;
  --accent-strong: #0b6756;
  --amber: #e5a92f;
  --dark: #0c2428;
  --shadow: 0 18px 45px rgba(12, 36, 40, .12);
  --radius: 8px;
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.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;
}

.container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.nav-shell {
  width: min(100% - 32px, var(--container));
  min-height: 72px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  border-radius: 8px;
  color: #fff;
  background: var(--dark);
  font-size: 14px;
  letter-spacing: 0;
}

.brand-text {
  font-size: 15px;
  line-height: 1.2;
}

.site-menu {
  display: none;
  position: absolute;
  left: 16px;
  right: 16px;
  top: 72px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
}

.site-menu.is-open {
  display: grid;
  gap: 4px;
}

.site-menu a {
  padding: 12px 10px;
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
}

.site-menu a:hover,
.site-menu a:focus-visible {
  color: var(--accent);
}

.menu-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  display: grid;
  place-content: center;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
}

.nav-cta {
  display: none;
}

.section {
  padding: 64px 0;
}

.hero {
  padding: 52px 0 56px;
  background:
    radial-gradient(circle at 95% 12%, rgba(17, 133, 111, .12), transparent 30%),
    linear-gradient(180deg, #f7fbfa 0%, #ffffff 74%);
}

.hero-grid {
  display: grid;
  gap: 34px;
  align-items: center;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: clamp(34px, 10vw, 68px);
  line-height: 1.02;
  letter-spacing: 0;
  max-width: 780px;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 7vw, 44px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 580px;
  color: var(--muted);
  font-size: clamp(18px, 4.5vw, 22px);
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  max-width: 100%;
  padding: 13px 18px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 14px;
  line-height: 1.2;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 12px 24px rgba(17, 133, 111, .22);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--accent-strong);
}

.button.secondary {
  color: var(--text);
  background: #fff;
  border-color: var(--line);
}

.trust-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
  color: var(--muted);
  font-weight: 700;
}

.trust-list li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.trust-list li::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  border-radius: 50%;
  background: var(--amber);
}

.hero-media {
  max-width: 620px;
  margin-inline: auto;
}

.hero-media img {
  width: 100%;
  max-height: 560px;
  object-fit: contain;
  border-radius: 8px;
}

.section-heading {
  max-width: 740px;
  margin: 0 auto 32px;
  text-align: center;
}

.section-heading.align-left {
  margin-inline: 0;
  text-align: left;
}

.section-heading p,
.split-grid p,
.source-panel p,
.faq-grid p,
.site-footer p {
  color: var(--muted);
}

.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.category-card {
  padding: 20px;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 10px 24px rgba(12, 36, 40, .06);
}

.category-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.icon {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 40px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: var(--surface-strong);
}

.icon::before,
.icon::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 2px solid var(--accent);
  border-radius: 4px;
}

.battery::after { inset: 16px 8px 16px 30px; background: var(--accent); border: 0; }
.connector::before { inset: 13px 9px; border-radius: 3px; }
.connector::after { inset: 16px 14px 16px 28px; background: var(--amber); border: 0; }
.flex::before { inset: 17px 6px; border-width: 4px; border-radius: 12px; }
.camera::before { inset: 9px; border-radius: 50%; }
.camera::after { inset: 17px; background: var(--accent); border-radius: 50%; border: 0; }
.speaker::before { inset: 10px 18px 10px 8px; }
.speaker::after { inset: 12px 8px 12px 24px; border: 2px solid var(--amber); border-left: 0; border-radius: 0 12px 12px 0; }
.mic::before { inset: 8px 14px 13px; border-radius: 12px; }
.mic::after { inset: 26px 17px 7px; background: var(--accent); border: 0; }
.button-icon::before { inset: 9px 16px; border-radius: 12px; }
.button-icon::after { inset: 17px 8px; background: var(--amber); border: 0; border-radius: 8px; }
.tray::before { inset: 12px 7px; border-radius: 5px; }
.tray::after { inset: 17px 17px; background: var(--accent); border: 0; border-radius: 50%; }
.chip::before { inset: 11px; border-radius: 4px; background: rgba(17, 133, 111, .12); }
.chip::after { inset: 6px 18px; border-top: 0; border-bottom: 0; border-color: var(--amber); border-radius: 0; }
.oled::before { inset: 9px; border-radius: 5px; background: #102326; }
.touch::before { inset: 8px 12px; border-radius: 8px; }
.touch::after { inset: 23px 17px 8px; background: var(--amber); border: 0; border-radius: 8px; }

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

.split-grid,
.faq-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.buyer-list {
  display: grid;
  gap: 12px;
}

.buyer-list div {
  padding: 16px 18px;
  border-radius: var(--radius);
  background: #fff;
  border-left: 4px solid var(--accent);
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(12, 36, 40, .06);
}

.reason-layout {
  display: grid;
  gap: 12px;
}

.reason-grid {
  display: grid;
  gap: 14px;
}

.reason-grid article {
  padding: 22px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.reason-grid span {
  display: block;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 900;
}

.reason-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.source-section {
  background: var(--dark);
  color: #fff;
}

.source-panel {
  display: grid;
  gap: 26px;
  align-items: center;
}

.source-panel p {
  color: #c7d8d8;
  font-size: 17px;
}

.source-button {
  justify-self: start;
  background: #23a98f;
}

.compact {
  padding-top: 58px;
}

.order-grid {
  display: grid;
  gap: 14px;
}

.order-grid article {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.order-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

.order-grid span {
  display: block;
  font-size: 30px;
  line-height: 1.1;
  font-weight: 900;
}

.faq-section {
  background: #fbfdfc;
}

.faq-list {
  display: grid;
  gap: 10px;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

summary {
  cursor: pointer;
  padding: 18px;
  font-weight: 900;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-size: 22px;
  line-height: 1;
}

details[open] summary::after {
  content: "-";
}

details p {
  padding: 0 18px 18px;
  margin: 0;
  color: var(--muted);
}

.final-cta {
  padding: 58px 0;
  text-align: center;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-strong), var(--dark));
}

.final-cta h2 {
  max-width: 760px;
  margin-inline: auto;
}

.site-footer {
  padding: 54px 0 0;
  color: #dce8e5;
  background: #081b1e;
}

.footer-grid {
  display: grid;
  gap: 30px;
}

.site-footer h2,
.site-footer h3 {
  color: #fff;
}

.site-footer h2 {
  font-size: 24px;
}

.site-footer h3 {
  font-size: 16px;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
  color: #b7c9c8;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #fff;
}

.footer-bottom {
  margin-top: 38px;
  padding: 18px 16px;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, .12);
  color: #b7c9c8;
}

.footer-bottom p {
  margin: 0;
}

@media (min-width: 560px) {
  .container,
  .nav-shell {
    width: min(100% - 48px, var(--container));
  }

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

  .trust-list {
    grid-template-columns: repeat(3, max-content);
  }
}

@media (min-width: 820px) {
  .section {
    padding: 86px 0;
  }

  .hero {
    padding: 72px 0 78px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
    gap: 44px;
  }

  .menu-toggle {
    display: none;
  }

  .site-menu {
    position: static;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    padding: 0;
    border: 0;
    box-shadow: none;
    background: transparent;
  }

  .site-menu a {
    padding: 8px 0;
    font-size: 13px;
  }

  .nav-shell {
    grid-template-columns: auto 1fr auto;
  }

  .nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 10px 14px;
    border-radius: 8px;
    color: #fff;
    background: var(--dark);
    font-size: 13px;
    font-weight: 800;
  }

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

  .split-grid,
  .faq-grid,
  .source-panel {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  }

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

  .reason-layout {
    grid-template-columns: 330px minmax(0, 1fr);
    gap: 42px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1.4fr .8fr .8fr 1fr;
  }
}

@media (min-width: 1080px) {
  .category-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 380px) {
  .container,
  .nav-shell {
    width: min(100% - 24px, var(--container));
  }

  .brand-text {
    font-size: 13px;
  }

  .button {
    width: 100%;
  }

  .hero-actions {
    gap: 10px;
  }

  summary {
    padding-right: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}