site-header {
  --aimin-header-bg: var(--header, var(--site-header, rgba(23, 25, 34, 0.92)));
  --aimin-header-surface: var(--surface, var(--site-surface, #171922));
  --aimin-header-surface-soft: var(--surface-soft, var(--site-soft, #13151c));
  --aimin-header-surface-strong: var(--surface-strong, var(--site-strong, #1d202a));
  --aimin-header-page-bg: var(--bg, var(--site-bg, #0e0f14));
  --aimin-header-text: var(--text, var(--site-text, #f4f4f5));
  --aimin-header-muted: var(--muted, var(--site-muted, #a3a6b1));
  --aimin-header-quiet: var(--quiet, var(--site-quiet, #747987));
  --aimin-header-line: var(--line, var(--site-line, #2b2f3a));
  --aimin-header-line-strong: var(--line-strong, #3b4050);
  --aimin-header-accent: var(--accent, var(--site-accent, #8da6ff));
  --aimin-header-overlay: var(--overlay, rgba(7, 8, 12, 0.82));
  --aimin-header-shadow: var(--shadow, var(--site-shadow, 0 16px 42px rgba(0, 0, 0, 0.22)));
  color: var(--aimin-header-text);
  font: inherit;
}

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

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

site-header button {
  color: inherit;
  font: inherit;
}

.aimin-header-site {
  position: fixed;
  z-index: 1000;
  top: 20px;
  left: 50%;
  width: min(1240px, calc(100% - 48px));
  padding: 0;
  pointer-events: auto;
  transform: translateX(-50%);
}

.aimin-header-navbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 64px;
  padding: 8px 10px 8px 18px;
  border: 1px solid var(--aimin-header-line);
  border-radius: 8px;
  background: var(--aimin-header-bg);
  box-shadow: var(--aimin-header-shadow);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.aimin-header-brand {
  display: inline-flex;
  align-items: center;
  width: 136px;
  min-height: 34px;
  padding: 0;
  background: transparent;
}

.aimin-header-brand-logo {
  display: block;
  width: 136px;
  height: auto;
  object-fit: contain;
  object-position: left center;
}

.aimin-header-brand-logo-black { display: none; }
:root[data-theme="light"] .aimin-header-brand-logo-white { display: none; }
:root[data-theme="light"] .aimin-header-brand-logo-black { display: block; }

.aimin-header-desktop-nav,
.aimin-header-actions {
  display: flex;
  align-items: center;
}

.aimin-header-desktop-nav { gap: 4px; }

.aimin-header-desktop-nav a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--aimin-header-muted);
  font-size: 14px;
  font-weight: 400;
  line-height: 24px;
  transition: background-color 180ms ease, color 180ms ease;
}

.aimin-header-desktop-nav a:hover,
.aimin-header-desktop-nav a[aria-current="page"] {
  background: var(--aimin-header-surface-strong);
  color: var(--aimin-header-text);
}

.aimin-header-actions {
  justify-content: flex-end;
  gap: 8px;
}

.aimin-header-icon-button,
.aimin-header-menu-toggle,
.aimin-header-dialog-close {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--aimin-header-line);
  border-radius: 6px;
  background: var(--aimin-header-surface-soft);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.aimin-header-icon-button:hover,
.aimin-header-menu-toggle:hover,
.aimin-header-dialog-close:hover {
  border-color: var(--aimin-header-line-strong);
  background: var(--aimin-header-surface-strong);
  transform: translateY(-1px);
}

.aimin-header-contact-button,
.aimin-header-primary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--aimin-header-line);
  border-radius: 6px;
  background: var(--aimin-header-text);
  color: var(--aimin-header-page-bg);
  font-size: 14px;
  font-weight: 700;
  line-height: 24px;
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.aimin-header-contact-button:hover,
.aimin-header-primary-link:hover {
  border-color: var(--aimin-header-line-strong);
  transform: translateY(-1px);
}

.aimin-header-menu-toggle {
  display: none;
  position: relative;
}

.aimin-header-menu-toggle span {
  position: absolute;
  left: 13px;
  width: 16px;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.aimin-header-menu-toggle span:nth-child(1) { transform: translateY(-5px); }
.aimin-header-menu-toggle span:nth-child(3) { transform: translateY(5px); }
.aimin-header-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg); }
.aimin-header-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.aimin-header-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg); }

.aimin-header-mobile-backdrop {
  position: fixed;
  z-index: 990;
  inset: 0;
  padding: 96px 20px 20px;
  background: var(--aimin-header-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.aimin-header-mobile-menu {
  width: min(100%, 420px);
  margin-inline: auto;
  padding: 26px 18px 18px;
  border: 1px solid var(--aimin-header-line-strong);
  border-radius: 8px;
  background: var(--aimin-header-surface);
  box-shadow: var(--aimin-header-shadow);
}

.aimin-header-mobile-menu nav {
  display: grid;
  gap: 4px;
}

.aimin-header-mobile-menu nav a {
  padding: 12px;
  border-radius: 6px;
  color: var(--aimin-header-text);
  font-size: 16px;
  font-weight: 700;
  line-height: 28px;
  text-align: center;
}

.aimin-header-mobile-menu nav a:hover,
.aimin-header-mobile-menu nav a[aria-current="page"] {
  background: var(--aimin-header-surface-strong);
}

.aimin-header-mobile-menu .aimin-header-primary-link {
  width: 100%;
  margin-top: 18px;
}

.aimin-header-contact-popover {
  --contact-qr-size: 160px;
  position: fixed;
  z-index: 1020;
  top: 96px;
  right: max(24px, calc((100vw - 1240px) / 2 + 10px));
  width: min(420px, calc(100vw - 48px));
  max-height: calc(100vh - 116px);
  overflow: auto;
  border: 1px solid var(--aimin-header-line-strong);
  border-radius: 8px;
  background: var(--aimin-header-surface);
  box-shadow: var(--aimin-header-shadow);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overscroll-behavior: contain;
  transition: opacity 180ms ease, visibility 180ms ease;
}

.aimin-header-contact-popover.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.aimin-header-contact-popover-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  height: 150px;
  padding: 20px;
}

.aimin-header-contact-kicker {
  margin: 0;
  color: var(--aimin-header-accent);
  font-size: 12px;
  line-height: 18px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.aimin-header-contact-popover-header h2 {
  margin: 5px 0 0;
  color: var(--aimin-header-text);
  font-size: 26px;
  line-height: 1.2;
}

.aimin-header-contact-intro {
  max-width: 360px;
  margin: 10px 0 0;
  color: var(--aimin-header-muted);
  font-size: 13px;
  line-height: 1.65;
}

.aimin-header-contact-qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 0 20px 20px;
}

.aimin-header-contact-channel {
  position: relative;
  min-width: 0;
  overflow: hidden;
  padding: 8px;
  border: 1px solid var(--aimin-header-line);
  border-radius: 6px;
  background: var(--aimin-header-surface-soft);
}

.aimin-header-contact-channel::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  content: "";
}

.aimin-header-contact-channel.is-wechat::before { background: #2fb344; }
.aimin-header-contact-channel.is-xiaohongshu::before { background: #e34c5b; }

.aimin-header-contact-channel-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 6px;
  height: auto;
  min-height: 58px;
  padding: 4px 1px 13px;
}

.aimin-header-contact-channel-label {
  display: block;
  margin-bottom: 4px;
  color: var(--aimin-header-quiet);
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
}

.aimin-header-contact-channel strong {
  display: block;
  color: var(--aimin-header-text);
  font-size: 14px;
  font-weight: 600;
  line-height: 22px;
  overflow-wrap: anywhere;
}

.aimin-header-contact-channel-action {
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--aimin-header-muted);
  font-size: 12px;
  font-weight: 600;
  line-height: 18px;
}

.aimin-header-contact-qr-frame {
  width: min(100%, var(--contact-qr-size));
  aspect-ratio: 1;
  overflow: visible;
  margin: 0 auto;
  border: 0;
  border-radius: 0;
  background: #fff;
}

.aimin-header-contact-qr-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.aimin-header-contact-direct-list { border-top: 1px solid var(--aimin-header-line); }

.aimin-header-contact-direct-link {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 60px;
  padding: 10px 20px;
  border-bottom: 1px solid var(--aimin-header-line);
  color: var(--aimin-header-text);
  transition: background-color 180ms ease;
}

.aimin-header-contact-direct-link:last-child { border-bottom: 0; }
.aimin-header-contact-direct-link:hover,
.aimin-header-contact-direct-link:focus-visible { background: var(--aimin-header-surface-strong); }
.aimin-header-contact-direct-platform { color: var(--aimin-header-quiet); font-size: 13px; font-weight: 500; line-height: 20px; }
.aimin-header-contact-direct-value { min-width: 0; font-size: 14px; font-weight: 600; line-height: 22px; overflow-wrap: anywhere; }
.aimin-header-contact-direct-action { color: var(--aimin-header-accent); font-size: 12px; font-weight: 600; line-height: 18px; }

site-header :focus-visible {
  outline: 2px solid var(--aimin-header-accent);
  outline-offset: 4px;
}

@media (max-width: 980px) {
  .aimin-header-desktop-nav,
  .aimin-header-contact-button { display: none; }
  .aimin-header-navbar { grid-template-columns: 1fr auto; }
  .aimin-header-menu-toggle { display: inline-grid; }
}

@media (max-width: 760px) {
  .aimin-header-site {
    top: 14px;
    width: calc(100% - 28px);
  }

  .aimin-header-navbar {
    min-height: 54px;
    padding: 6px 7px 6px 12px;
  }

  .aimin-header-icon-button,
  .aimin-header-menu-toggle {
    width: 38px;
    height: 38px;
  }

  .aimin-header-menu-toggle span { left: 10px; }
  .aimin-header-mobile-backdrop { padding: 82px 14px 14px; }
  .aimin-header-contact-popover {
    top: 82px;
    right: 14px;
    left: 14px;
    width: auto;
    max-height: calc(100dvh - 98px);
  }

  .aimin-header-contact-popover-header { padding: 18px; }
  .aimin-header-contact-popover-header h2 { font-size: 23px; }
  .aimin-header-contact-intro { margin-top: 7px; font-size: 12px; }
  .aimin-header-contact-qr-grid { grid-template-columns: 1fr; padding: 0 18px 18px; }
  .aimin-header-contact-channel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--contact-qr-size);
    gap: 10px;
    align-items: center;
  }
  .aimin-header-contact-channel-header { display: block; min-height: 0; }
  .aimin-header-contact-channel-action { display: block; margin-top: 10px; }
  .aimin-header-contact-direct-link { grid-template-columns: 68px minmax(0, 1fr); }
  .aimin-header-contact-direct-action { grid-column: 2; }
}

@media (max-width: 430px) {
  .aimin-header-contact-popover { --contact-qr-size: 132px; }
  .aimin-header-contact-popover-header { height: auto; min-height: 138px; }
}

@media (prefers-reduced-motion: reduce) {
  site-header *,
  site-header *::before,
  site-header *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}