/* 液态玻璃：6 层结构（geelinx 式） */
.glass {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  overflow: hidden;
}

.glass__outer {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  -webkit-backdrop-filter: url(#liquid_glass_filter);
  backdrop-filter: url(#liquid_glass_filter);
  -webkit-mask-image: radial-gradient(70% 55%, #0000 45%, #0000004d 62%, #000000b3 80%, #000 100%);
  mask-image: radial-gradient(70% 55%, #0000 45%, #0000004d 62%, #000000b3 80%, #000 100%);
}

.glass__chroma {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: inherit;
  pointer-events: none;
  -webkit-backdrop-filter: url(#liquid_glass_chroma);
  backdrop-filter: url(#liquid_glass_chroma);
  -webkit-mask-image: radial-gradient(70% 55%, #0000 45%, #0000004d 62%, #000000b3 80%, #000 100%);
  mask-image: radial-gradient(70% 55%, #0000 45%, #0000004d 62%, #000000b3 80%, #000 100%);
}

.glass__cover {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  background: #ffffff0d;
  -webkit-backdrop-filter: blur(0.5px);
  backdrop-filter: blur(0.5px);
}

.glass__reflect {
  position: absolute;
  inset: 1px;
  z-index: 3;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset 0 2px 6px rgba(255, 255, 255, 0.22), inset 0 -3px 8px rgba(0, 0, 0, 0.1);
}

.glass__sharp {
  position: absolute;
  inset: 0;
  z-index: 4;
  border-radius: inherit;
  pointer-events: none;
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.45), inset 0 -1px rgba(0, 0, 0, 0.12);
}

.glass__highlight {
  position: absolute;
  inset: 0;
  z-index: 5;
  border-radius: inherit;
  overflow: hidden;
  pointer-events: none;
  background: linear-gradient(180deg, #ffffff4d 0%, #ffffff14 20%, #0000 42%);
}

/* 玻璃表面容器：复用顶栏 6 层玻璃 */
.glass-surface {
  position: relative;
  overflow: hidden;
}

.glass-surface > :not(.glass) {
  position: relative;
}

/* 有色玻璃：主行动按钮使用品牌蓝调 */
.glass-surface--tint {
  color: #fff;
}

.glass-surface--tint .glass__cover {
  background: rgba(36, 137, 253, 0.55);
  transition: background 0.25s ease;
}

.glass-surface--tint:hover .glass__cover {
  background: rgba(36, 137, 253, 0.68);
}

:root[data-theme='dark'] .glass-surface--tint .glass__cover {
  background: rgba(36, 137, 253, 0.42);
}

:root[data-theme='dark'] .glass-surface--tint:hover .glass__cover {
  background: rgba(36, 137, 253, 0.56);
}

/* 开场加载动画（geelinx 式） */
.loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: #000;
  overflow: hidden;
  will-change: transform, filter, opacity;
}

.loader__skip {
  position: absolute;
  bottom: 24px;
  right: 28px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 0.76rem;
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  cursor: pointer;
  transition: background 0.25s ease, border-color 0.25s ease, opacity 0.4s ease;
}

.loader__skip svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.loader__skip:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.4);
}

.loader__glitch {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.loader__scene {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: #000;
}

.loader.is-scene .loader__scene {
  display: flex;
}

.loader__frame {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  border: 0 solid #fff;
  transition: border-width 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.loader.phase-border .loader__frame {
  border-width: 60px;
}

.loader.phase-squeeze .loader__frame,
.loader.phase-dark .loader__frame,
.loader.phase-light-g .loader__frame,
.loader.phase-light-el .loader__frame,
.loader.phase-light-x .loader__frame,
.loader.phase-light-elin .loader__frame,
.loader.phase-light-full .loader__frame,
.loader.phase-glow .loader__frame {
  border-width: 0;
}

.loader__light {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
}

.loader__light-layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.loader__light-layer[data-layer='g'] {
  background: linear-gradient(195deg, #ffffff59 0%, #0000 50%);
}

.loader__light-layer[data-layer='el'] {
  background: linear-gradient(195deg, #ffffff40 0%, #0000 60%);
}

.loader__light-layer[data-layer='x'] {
  background: linear-gradient(195deg, #ffffff26 0%, #0000 70%);
}

.loader__light-layer[data-layer='elin'] {
  background: radial-gradient(at 40%, #ffffff4d 0%, #0000 60%);
}

.loader__light-layer[data-layer='full'] {
  background: radial-gradient(at 40%, #ffffff73 0%, #0000 60%);
}

.loader__light-layer[data-layer='glow'] {
  background: radial-gradient(at 45%, #ffffffd9 0%, #fff3 50%, #0000 80%);
  transition: opacity 0.6s ease;
}

.loader__brand {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  will-change: transform;
}

.loader__logo {
  width: 240px;
  max-width: 60vw;
  filter: brightness(0);
  transition: filter 0.3s;
}

.loader.phase-light-g .loader__logo {
  filter: brightness(0.35);
}

.loader.phase-light-el .loader__logo {
  filter: brightness(0.55);
}

.loader.phase-light-x .loader__logo {
  filter: brightness(0.7);
}

.loader.phase-light-elin .loader__logo {
  filter: brightness(0.8);
}

.loader.phase-light-full .loader__logo {
  filter: brightness(0.92) drop-shadow(0 0 15px #ffffff26);
}

.loader.phase-glow .loader__logo {
  filter: brightness(1.15) drop-shadow(0 0 30px #ffffffb3);
  transition: filter 0.5s;
}

.loader__tag {
  position: absolute;
  bottom: 30%;
  left: 50%;
  transform: translate(-50%);
  z-index: 6;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: #fff;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.4s ease, color 0.4s ease, filter 0.8s;
}

.loader.is-tag .loader__tag {
  opacity: 1;
}

.tw {
  display: inline-block;
}

.tw-gap {
  display: inline-block;
  width: 0.55em;
}

.loader .loader__tag .tw--accent {
  color: var(--accent);
}

.loader.is-done {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

@keyframes tagPop {
  0% {
    opacity: 0;
    transform: translateY(6px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 悬浮导航（geelinx 式液态玻璃 island） */
.island {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  width: max-content;
  max-width: calc(100vw - 16px);
  --glass-radius: var(--radius-nav);
  border-radius: var(--glass-radius);
  padding: 10px 28px;
  box-shadow: 0 4px 16px #00000012, 0 12px 40px #0000000d;
  transition: box-shadow 0.4s ease, top 0.4s ease, border-radius 0.5s var(--ease-out);
}

.island.is-scrolled {
  top: 10px;
  box-shadow: 0 4px 20px #0000001a, 0 12px 48px #00000012;
}

.island.is-open {
  border-radius: var(--radius-md);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.island.is-open .glass__highlight::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 70%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.16), transparent);
  transform: translateX(-120%);
  animation: glassSweep 0.9s var(--ease-out) 0.12s both;
  pointer-events: none;
}

@keyframes glassSweep {
  to {
    transform: translateX(220%);
  }
}

.island__inner {
  position: relative;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 26px;
  min-width: 0;
}

.island.is-compact-cta .island__cta {
  display: none;
}

.island.is-compact-nav .island__inner {
  gap: 14px;
}

.island.is-compact-nav .island__nav {
  gap: 12px;
}

.island.is-compact-nav .island__link {
  font-size: 0.8rem;
}

.island.is-compact-menu .island__nav {
  display: none;
}

.island.is-compact-menu .island__burger {
  display: flex;
}

.island.is-compact-icon .island__logo-img {
  display: none;
}

.island.is-compact-icon .island__logo-icon {
  display: block;
}

.island__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  border-radius: var(--radius-nav-btn);
  transition: opacity 0.25s ease, transform 0.25s var(--ease-out);
}

.island__logo:hover {
  opacity: 0.82;
  transform: translateY(-1px);
}

.island__logo-img {
  height: 24px;
  width: auto;
  content: var(--logo-src);
}

.island__logo-icon {
  display: none;
  height: 26px;
  width: 26px;
}

.island__nav {
  display: flex;
  gap: 22px;
  min-width: 0;
}

.island__link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--text-2);
  white-space: nowrap;
  transition: color 0.25s ease;
}

.island__link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -5px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.35s var(--ease-out);
}

.island__link:hover {
  color: var(--text);
}

.island__link:hover::after {
  width: 100%;
}

.island__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-nav-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s var(--ease-out);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px -5px rgba(36, 137, 253, 0.5);
}

.island__lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-nav-btn);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s var(--ease-out);
}

.island__lang svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.island__lang:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px -5px rgba(36, 137, 253, 0.5);
}

.theme-toggle__icon {
  position: absolute;
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
  transition: opacity 0.35s ease, transform 0.5s var(--ease-out);
}

:root[data-theme-pref='auto'] .theme-toggle__icon--monitor,
:root[data-theme-pref='light'] .theme-toggle__icon--sun,
:root[data-theme-pref='dark'] .theme-toggle__icon--moon {
  opacity: 1;
  transform: rotate(0) scale(1);
}

.island__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 11px;
  border-radius: var(--radius-nav-btn);
  border: 1px solid var(--border);
  color: var(--text-2);
  transition: color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s var(--ease-out);
}

.island__burger:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px -5px rgba(36, 137, 253, 0.5);
}

.island__burger span {
  display: block;
  height: 2px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.3s var(--ease-out), opacity 0.25s ease;
}

.island__burger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.island__burger.is-open span:nth-child(2) {
  opacity: 0;
}

.island__burger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.island__menu {
  position: relative;
  z-index: 6;
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  opacity: 0;
  transition: grid-template-rows 0.6s var(--ease-out), opacity 0.4s ease;
}

.island__menu-inner {
  min-height: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 6px;
}

.island.is-open .island__menu {
  grid-template-rows: 1fr;
  opacity: 1;
}

.island__menu .island__link,
.island__menu .island__menu-cta {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.45s ease, transform 0.45s var(--ease-out), color 0.25s ease, background 0.25s ease;
}

.island.is-open .island__menu .island__link,
.island.is-open .island__menu .island__menu-cta {
  opacity: 1;
  transform: none;
}

.island.is-open .island__menu .island__link:nth-child(1) { transition-delay: 0.12s; }
.island.is-open .island__menu .island__link:nth-child(2) { transition-delay: 0.2s; }
.island.is-open .island__menu .island__link:nth-child(3) { transition-delay: 0.28s; }
.island.is-open .island__menu .island__link:nth-child(4) { transition-delay: 0.36s; }
.island.is-open .island__menu .island__menu-cta { transition-delay: 0.46s; }

.island__menu .island__link {
  display: block;
  padding: 11px 12px;
  border-radius: var(--radius-nav-btn);
  font-size: 0.9rem;
}

.island__menu .island__link:hover {
  color: var(--text);
  background: color-mix(in srgb, var(--text) 6%, transparent);
}

.island__menu-cta {
  display: block;
  margin-top: 6px;
  padding: 11px 12px;
  border-radius: var(--radius-nav-btn);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  transition: filter 0.25s ease, transform 0.25s var(--ease-out), box-shadow 0.25s ease;
}

.island__menu-cta:hover {
  filter: brightness(0.94);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px -6px rgba(36, 137, 253, 0.55);
}

.island.is-open .island__menu .island__menu-cta:hover {
  transform: translateY(-1px);
}

.island__cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--radius-nav-btn);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 600;
  transition: color 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease, transform 0.25s var(--ease-out);
}

.island__cta:hover {
  transform: translateY(-1px);
  filter: brightness(0.94);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.25s var(--ease-out), box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.btn--primary {
  color: #fff;
  box-shadow: 0 8px 26px -8px rgba(36, 137, 253, 0.6);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px -8px rgba(36, 137, 253, 0.7);
}

.btn--ghost {
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn--lg {
  padding: 15px 36px;
  font-size: 1.02rem;
}

/* 代码块 */
.code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--code-text);
  background: var(--code-bg);
  border-radius: var(--radius-sm);
  padding: 15px 18px;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.06);
  white-space: pre;
}

.code code {
  font-family: inherit;
}

.tok-k { color: #79a8ff; }
.tok-c { color: #8b9bb0; }
.tok-v { color: #ffb26b; }
.tok-s { color: #8fe3b0; }
.tok-fn { color: #62d4ff; }
.tok-cm { color: #5f7085; }

/* 页脚 */
.footer {
  position: relative;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
}

.footer__inner {
  padding-block: 60px 30px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: var(--space-xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__logo {
  display: inline-flex;
  border-radius: var(--radius-sm);
  transition: opacity 0.25s ease, transform 0.25s var(--ease-out);
}

.footer__logo:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

.footer__logo img {
  height: 30px;
  width: auto;
  content: var(--logo-src);
}

.footer__slogan {
  font-size: var(--fs-sm);
  color: var(--text-3);
}

.footer__links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.footer__group h4 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 14px;
}

.footer__group a {
  display: block;
  padding-block: 6px;
  font-size: var(--fs-sm);
  color: var(--text-3);
  transition: color 0.25s ease;
}

.footer__group a:hover {
  color: var(--accent);
}

.footer__bar {
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.footer__copyright,
.footer__note {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  color: var(--text-3);
}