.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  width: 100%;
  min-height: 78px;
  margin: 0;
  border-bottom: 0;
  padding: 0 max(32px, calc((100vw - var(--max-width)) / 2));
  background: #000;
  box-shadow: none;
  backdrop-filter: none;
  transition: background 220ms ease, box-shadow 220ms ease, min-height 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled {
  min-height: 64px;
  background: rgba(8, 10, 12, 0.78);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.brand img {
  width: 152px;
  max-height: 54px;
  height: auto;
  object-fit: contain;
  filter: brightness(1.15) contrast(1.04);
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  color: rgba(246, 249, 250, 0.84);
  font-size: 13.5px;
  letter-spacing: 0.01em;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  background: var(--geshem-green);
  content: "";
  opacity: 0;
  transform: scaleX(0.35);
  transition:
    opacity 180ms ease
    transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

/* ── 导航下拉菜单 ── */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: rgba(246, 249, 250, 0.84);
  cursor: pointer;
  font: inherit;
  font-size: 13.5px;
  letter-spacing: 0.01em;
}

.nav-dropdown-trigger:hover {
  color: #fff;
}

.nav-dropdown-arrow {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 180ms ease;
}

.nav-dropdown-trigger[aria-expanded="true"] .nav-dropdown-arrow {
  transform: translateY(1px) rotate(-135deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  z-index: 30;
  display: none;
  flex-direction: column;
  min-width: 160px;
  border: 1px solid rgba(215, 222, 227, 0.14);
  border-radius: 8px;
  padding: 8px;
  background: rgba(12, 15, 17, 0.96);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
}

.nav-dropdown-menu.is-open {
  display: flex;
}

.nav-dropdown-menu a {
  border-radius: 8px;
  padding: 10px 14px;
  color: rgba(246, 249, 250, 0.86);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
}

.nav-dropdown-menu a:hover {
  background: rgba(216, 163, 74, 0.14);
  color: #fff;
}

.nav-dropdown-menu a::after {
  display: none;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0 22px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.01em;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    transform 180ms ease
    box-shadow 180ms ease;
}

.button-primary {
  background: var(--geshem-green);
  color: #fff;
}

.button-primary:hover {
  background: var(--geshem-green-dark);
  transform: translateY(-1px);
}

.language-select {
  position: relative;
  justify-self: end;
}

.language-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid rgba(215, 222, 227, 0.18);
  border-radius: 8px;
  padding: 0 18px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(246, 249, 250, 0.92);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  transition:
    border-color 180ms ease,
    color 180ms ease
    transform 180ms ease;
}

.language-trigger::before {
  width: 20px;
  height: 20px;
  margin-right: 8px;
  background: url("assets/images/globe-map-icon.svg") center / contain no-repeat;
  content: "";
}

.language-trigger::after {
  width: 7px;
  height: 7px;
  margin-left: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  content: "";
  transform: translateY(-2px) rotate(45deg);
}

.language-trigger span {
  line-height: 1;
}

.language-trigger:hover {
  border-color: rgba(216, 163, 74, 0.48);
  color: #fff;
}

.language-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 30;
  display: none;
  min-width: 190px;
  border: 1px solid rgba(215, 222, 227, 0.14);
  border-radius: 8px;
  padding: 8px;
  background: rgba(12, 15, 17, 0.96);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(18px);
}

.language-menu.is-open {
  display: grid;
}

.language-menu a {
  border-radius: 8px;
  padding: 10px 12px;
  color: rgba(246, 249, 250, 0.86);
  font-size: 14px;
  font-weight: 500;
}

.language-menu a:hover {
  background: rgba(216, 163, 74, 0.14);
  color: #fff;
}

.button-secondary {
  border-color: #cfd5d2;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.button-secondary:hover {
  border-color: var(--geshem-green);
  color: var(--geshem-green-dark);
}

.button-ai {
  border-color: rgba(0, 144, 64, 0.42);
  background: rgba(0, 144, 64, 0.08);
  color: var(--geshem-green-dark);
  box-shadow: inset 0 0 0 1px rgba(0, 144, 64, 0.06);
  cursor: pointer;
}

.button-ai::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 8px;
  background: var(--geshem-green);
  content: "";
}

.button-ai:hover {
  border-color: var(--geshem-green);
  color: var(--geshem-green-dark);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-gray);
  border-radius: 8px;
  background: #fff;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1.12fr);
  align-items: center;
  gap: 26px;
  width: min(100% - 40px, var(--max-width));
  min-height: 58vh;
  margin: 0 auto;
  padding: 38px 0 18px;
}

.hero-copy {
  max-width: 640px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--geshem-green-dark);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  color: var(--deep-black);
  font-size: clamp(40px, 6.5vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--deep-black);
  font-size: clamp(30px, 4.5vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--deep-black);
  font-size: 21px;
  line-height: 1.22;
  letter-spacing: 0;
}

.hero-lede,
.section-heading p,
.feature-copy p,
.about-content p,
.contact-copy p {
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-media {
  position: relative;
  align-self: stretch;
  min-height: 350px;
}

.hero-media img {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: var(--shadow);
}

.section {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
  padding: 104px 0;
}

.product-section {
  width: 100%;
}

.product-top-section {
  margin: 0 auto;
  padding: 0 0 104px;
}