/* ══════════════════════════════════════════
   全站顶栏 · Nav v3 · Editorial
   ══════════════════════════════════════════ */

.site-header--light {
  border-bottom-color: rgba(17, 17, 17, 0.06);
}

.site-header--light .site-header__inner {
  height: 84px;
}

/* ── Logo ── */
.site-header--light .site-brand {
  gap: 14px;
  min-width: 0;
  flex: 1;
  max-width: calc(100% - 400px);
}
.site-header--light .site-brand__logo {
  height: 44px;
  width: auto;
  flex-shrink: 0;
}
.site-header--light .site-brand__text {
  padding-left: 14px;
  min-width: 0;
}
.site-header--light .site-brand__text::before {
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--red), rgba(207, 56, 52, 0.35));
}
.site-header--light .site-brand__text strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.3;
  color: var(--ink);
  white-space: nowrap;
}
.site-header--light .site-brand__text span {
  display: block;
  margin-top: 5px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: none;
  color: rgba(17, 17, 17, 0.55);
  line-height: 1.35;
  white-space: nowrap;
}

/* ── Nav · 纯文字编辑风 ── */
.site-header--light .site-nav {
  align-self: center;
  height: auto;
  margin-right: 0;
}
.site-header--light .site-nav__rail {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0;
  background: none;
  border: none;
  border-radius: 0;
}
.site-header--light .site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: auto;
  padding: 6px 0;
  margin: 0 32px;
  border-radius: 0;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: rgba(17, 17, 17, 0.52);
  white-space: nowrap;
  transition: color 0.28s ease;
}
.site-header--light .site-nav a:first-child {
  margin-left: 0;
}
.site-header--light .site-nav a:last-child {
  margin-right: 0;
}
/* 分隔线 */
.site-header--light .site-nav a + a::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 14px;
  background: rgba(17, 17, 17, 0.1);
  pointer-events: none;
}
.site-header--light .site-nav a:hover {
  color: var(--ink);
  background: transparent;
}
.site-header--light .site-nav a.is-active {
  color: var(--ink);
  font-weight: 600;
  background: transparent;
  box-shadow: none;
}
/* 激活 · 字下短红线 */
.site-header--light .site-nav a.is-active::after {
  display: block;
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  border-radius: 1px;
  background: var(--red);
}
.site-header--light .site-nav a.is-active:hover {
  color: var(--ink);
  background: transparent;
}

/* ── 首页顶栏 ── */
.page-home .site-header--home {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: transparent;
}
.page-home .site-header--home.is-scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: rgba(17, 17, 17, 0.06);
  box-shadow: 0 1px 0 rgba(17, 17, 17, 0.04);
}

/* ── 透明 Hero 顶栏 ── */
.site-header--hero:not(.is-scrolled) {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}
.site-header--hero:not(.is-scrolled) .site-nav a {
  color: rgba(255, 255, 255, 0.72);
}
.site-header--hero:not(.is-scrolled) .site-nav a + a::before {
  background: rgba(255, 255, 255, 0.22);
}
.site-header--hero:not(.is-scrolled) .site-nav a:hover {
  color: #fff;
  background: transparent;
}
.site-header--hero:not(.is-scrolled) .site-nav a.is-active {
  color: #fff;
  background: transparent;
}
.site-header--hero:not(.is-scrolled) .site-nav a.is-active::after {
  background: #fff;
  width: 22px;
}

/* ── 汉堡按钮 ── */
.site-header--light .site-nav-toggle {
  border-color: rgba(17, 17, 17, 0.1);
  border-radius: 10px;
  background: transparent;
}

/* ── 响应式 ── */
@media (max-width: 1240px) {
  .site-header--light .site-nav a {
    margin: 0 24px;
    font-size: 14px;
    letter-spacing: 0.06em;
  }
  .site-header--light .site-nav a + a::before {
    left: -24px;
  }
}
@media (max-width: 1100px) {
  .site-header--light .site-brand {
    max-width: calc(100% - 340px);
  }
  .site-header--light .site-brand__text span { display: none; }
  .site-header--light .site-brand__text strong {
    font-size: 14px;
  }
  .site-header--light .site-nav a {
    margin: 0 18px;
    font-size: 14px;
  }
  .site-header--light .site-nav a + a::before {
    left: -18px;
    height: 12px;
  }
}
@media (max-width: 900px) {
  .site-header--light .site-nav a {
    margin: 0 14px;
    font-size: 13px;
    letter-spacing: 0.04em;
  }
  .site-header--light .site-nav a + a::before {
    left: -14px;
  }
}
@media (max-width: 768px) {
  .site-header--light .site-nav-toggle {
    display: flex;
  }
  .site-header--light .site-header__inner {
    height: 64px;
  }
  .site-header--light .site-brand {
    max-width: calc(100% - 52px);
  }
  .site-header--light .site-brand__logo {
    height: 38px;
  }
  .site-header--light .site-brand__text strong {
    font-size: 12px;
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .site-header--light .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    padding: 8px 24px 24px;
    background: #fff;
    border-bottom: 1px solid rgba(17, 17, 17, 0.08);
    box-shadow: 0 16px 40px rgba(17, 17, 17, 0.08);
  }
  .site-header.is-open .site-nav {
    display: block;
  }
  .site-header--light .site-nav__rail {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 4px 0;
  }
  .site-header--light .site-nav a {
    width: 100%;
    margin: 0;
    padding: 16px 4px;
    justify-content: flex-start;
    font-size: 16px;
    letter-spacing: 0.06em;
    color: var(--ink-2);
    border-bottom: 1px solid rgba(17, 17, 17, 0.06);
  }
  .site-header--light .site-nav a:last-child {
    border-bottom: none;
  }
  .site-header--light .site-nav a + a::before {
    display: none;
  }
  .site-header--light .site-nav a.is-active {
    color: var(--red);
    padding-left: 16px;
  }
  .site-header--light .site-nav a.is-active::after {
    left: 0;
    bottom: auto;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 18px;
    border-radius: 0 2px 2px 0;
  }
  .site-header--hero.is-open .site-nav {
    background: var(--dark);
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  .site-header--hero.is-open .site-nav a {
    color: rgba(255, 255, 255, 0.85);
    border-bottom-color: rgba(255, 255, 255, 0.08);
  }
  .site-header--hero.is-open .site-nav a.is-active {
    color: #fff;
  }
  .site-header--hero.is-open .site-nav a.is-active::after {
    background: #fff;
  }
}