/* ================= 共享导航栏样式 nav.css ================= */

.home-hero__nav {
  position: fixed;
  top: max(14px, env(safe-area-inset-top, 0px));
  left: 50%;
  z-index: 100;
  width: min(100%, calc(100vw - 28px));
  display: flex;
  justify-content: center;
  transform: translateX(-50%);
  pointer-events: none;
  transition: transform 0.32s ease, opacity 0.32s ease;
}

.hero-nav-shell {
  --shadow-x: 0px;
  --shadow-opacity: 0;
  --shadow-scale: 0.94;
  position: relative;
  display: inline-flex;
  justify-content: center;
  padding-bottom: 54px;
  pointer-events: auto;
}

.hero-nav-wrap {
  --round: 16px;
  --p-x: 10px;
  --p-y: 8px;
  --w-label: 132px;
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--p-y) var(--p-x);
  border-radius: var(--round);
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  box-shadow: none;
  isolation: isolate;
  transition:
    background-color 0.32s ease,
    box-shadow 0.32s ease,
    backdrop-filter 0.32s ease,
    -webkit-backdrop-filter 0.32s ease;
}

.hero-nav-wrap::-webkit-scrollbar {
  display: none;
}

.home-hero__nav:not(.is-scrolled) .hero-nav-wrap {
  background: transparent !important;
  box-shadow: none !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.home-hero__nav.is-scrolled .hero-nav-wrap {
  background: rgba(255, 247, 228, 0.58);
  box-shadow:
    0 16px 34px rgba(45, 32, 22, 0.08),
    inset 0 0 0 1px rgba(90, 59, 46, 0.08);
  backdrop-filter: blur(14px) saturate(1.08);
  -webkit-backdrop-filter: blur(14px) saturate(1.08);
}

.hero-nav-label {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--w-label);
  min-width: var(--w-label);
  padding: 13px 16px;
  border-radius: calc(var(--round) - var(--p-y));
  color: rgba(90, 59, 46, 0.9);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  transition: color 0.26s ease, transform 0.26s ease, opacity 0.26s ease;
  -webkit-tap-highlight-color: transparent;
}

.hero-nav-label:hover,
.hero-nav-label:focus-visible {
  color: #2d2016;
  transform: translateY(-1px);
}

.hero-nav-label.is-current {
  color: #2d2016;
}

.hero-nav-slidebar {
  position: absolute;
  left: 10px;
  width: var(--w-label);
  height: calc(100% - (var(--p-y) * 4));
  border-radius: calc(var(--round) - var(--p-y));
  background: rgba(90, 59, 46, 0.08);
  box-shadow: 0 10px 18px rgba(45, 32, 22, 0.08);
  z-index: 1;
  opacity: 0;
  transform: translateX(calc(var(--nav-hover-index) * 100%));
  transition:
    transform 0.5s cubic-bezier(0.33, 0.83, 0.99, 0.98),
    opacity 0.2s ease;
}

.hero-nav-wrap:hover .hero-nav-slidebar,
.hero-nav-wrap:focus-within .hero-nav-slidebar {
  opacity: 0.42;
}

.hero-nav-bar {
  position: absolute;
  left: 10px;
  width: var(--w-label);
  height: 100%;
  z-index: 2;
  pointer-events: none;
  transform: translateX(calc(var(--nav-active-index) * 100%));
  transition: transform 0.5s cubic-bezier(0.33, 0.83, 0.99, 0.98);
}

.hero-nav-bar::before,
.hero-nav-bar::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 4px;
  background: #5a3b2e;
}

.hero-nav-bar::before {
  top: 0;
  border-radius: 0 0 999px 999px;
}

.hero-nav-bar::after {
  bottom: 0;
  border-radius: 999px 999px 0 0;
}

.hero-nav-hover-shadow {
  position: absolute;
  left: 0;
  bottom: -18px;
  width: 296px;
  height: 82px;
  transform: translateX(var(--shadow-x)) scale(var(--shadow-scale));
  transform-origin: center center;
  opacity: var(--shadow-opacity);
  pointer-events: none;
  z-index: 0;
  transition: opacity 0.22s ease;
}

.hero-nav-hover-shadow::before,
.hero-nav-hover-shadow::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 999px;
  pointer-events: none;
}

.hero-nav-hover-shadow::before {
  background: radial-gradient(
    ellipse at center,
    rgba(33, 24, 18, 0.3) 0%,
    rgba(33, 24, 18, 0.18) 30%,
    rgba(33, 24, 18, 0.06) 48%,
    rgba(90, 59, 46, 0) 76%
  );
  filter: blur(18px);
}

.hero-nav-hover-shadow::after {
  inset: 12px 22px 4px;
  background: radial-gradient(
    ellipse at center,
    rgba(239, 187, 0, 0.24) 0%,
    rgba(239, 187, 0, 0.1) 32%,
    rgba(239, 187, 0, 0) 74%
  );
  filter: blur(18px);
}

.hero-nav-hover-outline {
  display: none !important;
}

/* ================= 响应式断点 ================= */

@media (min-width: 1600px) {
  .home-hero__nav {
    top: max(20px, env(safe-area-inset-top, 0px));
  }
}

@media (max-width: 1024px) {
  .home-hero__nav {
    top: max(12px, env(safe-area-inset-top, 0px));
    width: min(100%, calc(100vw - 24px));
  }

  .hero-nav-wrap {
    --w-label: 118px;
  }
}

@media (max-width: 760px) {
  .hero-nav-wrap {
    --w-label: 108px;
    --p-x: 8px;
  }

  .hero-nav-label {
    padding: 12px 10px;
    font-size: 13px;
  }
}

@media (max-width: 680px) {
  .home-hero__nav {
    top: max(10px, env(safe-area-inset-top, 0px));
    width: min(100%, calc(100vw - 12px));
  }

  .hero-nav-hover-shadow {
    width: 260px;
    height: 82px;
    bottom: -14px;
  }
}

@media (max-width: 560px) {
  .hero-nav-wrap {
    --w-label: 94px;
    --p-y: 7px;
    --round: 14px;
  }

  .hero-nav-label {
    padding: 11px 10px;
    font-size: 12.5px;
  }
}

@media (max-width: 420px) {
  .home-hero__nav {
    width: min(100%, calc(100vw - 16px));
  }

  .hero-nav-wrap {
    --w-label: 86px;
  }

  .hero-nav-label {
    padding: 10px 8px;
    font-size: 12px;
  }
}

@media (max-width: 359px) {
  .hero-nav-label {
    padding: 10px 6px;
    font-size: 11.5px;
  }
}

/* ================= 触屏设备 ================= */

@media (hover: none) and (pointer: coarse) {
  .hero-nav-hover-shadow,
  .hero-nav-hover-outline,
  .hero-nav-slidebar {
    display: none;
  }

  .hero-nav-label:hover,
  .hero-nav-label:focus-visible {
    transform: none;
    box-shadow: none;
  }

  .hero-nav-label,
  .hero-nav-label:active {
    touch-action: manipulation;
  }

  .hero-nav-label:active,
  .hero-nav-label:focus-visible {
    color: #40281e;
  }
}

/* ================= 移动端降级：关闭 backdrop-filter ================= */

@media (max-width: 1024px) {
  .home-hero__nav.is-scrolled .hero-nav-wrap {
    background: rgba(255, 247, 228, 0.92);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}