/* 未登录官网 Landing —— 独立样式，避免被 main 层叠挡住 FAB */

body.is-landing .bg-scene { opacity: 0.18; }
body.is-landing main.wrap {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0;
  z-index: auto;
}
body.is-landing .site-footer {
  margin-top: 0;
  border-top: 1px solid var(--line);
  padding-bottom: calc(5.5rem + env(safe-area-inset-bottom, 0px));
}

.landing {
  position: relative;
  color: var(--ink);
  overflow: clip;
}

.land-fx {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.land-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  opacity: 0.45;
  will-change: transform;
}
.land-orb--a {
  width: min(52vw, 420px);
  height: min(52vw, 420px);
  top: -8%;
  left: -10%;
  background: radial-gradient(circle, rgba(45, 212, 191, 0.55), transparent 68%);
  animation: land-orb-drift 18s ease-in-out infinite alternate;
}
.land-orb--b {
  width: min(48vw, 380px);
  height: min(48vw, 380px);
  top: 38%;
  right: -12%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.42), transparent 70%);
  animation: land-orb-drift 22s ease-in-out infinite alternate-reverse;
}
.land-orb--c {
  width: min(40vw, 300px);
  height: min(40vw, 300px);
  bottom: 4%;
  left: 28%;
  background: radial-gradient(circle, rgba(94, 234, 212, 0.28), transparent 72%);
  animation: land-orb-drift 26s ease-in-out infinite alternate;
}
.land-noise {
  position: absolute;
  inset: 0;
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.land-hero {
  position: relative;
  min-height: min(92vh, 920px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}
.land-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.land-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
  display: block;
  transform: scale(1.02);
  animation: land-hero-ken 28s ease-in-out alternate infinite;
}
.land-hero-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(7, 11, 18, 0.35) 0%, rgba(7, 11, 18, 0.55) 42%, rgba(7, 11, 18, 0.9) 100%),
    linear-gradient(90deg, rgba(7, 11, 18, 0.58) 0%, transparent 55%);
  pointer-events: none;
}
[data-theme="light"] .land-hero-veil {
  background:
    linear-gradient(180deg, rgba(243, 246, 250, 0.2) 0%, rgba(243, 246, 250, 0.45) 40%, rgba(243, 246, 250, 0.92) 100%),
    linear-gradient(90deg, rgba(20, 32, 51, 0.35) 0%, transparent 55%);
}
.land-hero-grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(94, 234, 212, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(94, 234, 212, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 78%);
  animation: land-grid-shift 20s linear infinite;
}
.land-hero-copy {
  position: relative;
  z-index: 2;
  width: min(1240px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 5.5rem 0 3.2rem;
  max-width: 38rem;
  justify-self: start;
  margin-left: max(1rem, calc((100% - min(1240px, calc(100% - 2rem))) / 2));
}
.land-brand {
  margin: 0 0 0.85rem;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
}
.land-brand span {
  background: linear-gradient(110deg, #5eead4 0%, #2dd4bf 35%, #38bdf8 70%, #5eead4 100%);
  background-size: 220% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: land-shine 6s linear infinite;
}
.land-hero h1 {
  margin: 0 0 0.85rem;
  font-family: var(--display);
  font-size: clamp(1.65rem, 4.2vw, 2.75rem);
  font-weight: 650;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: #f4fbff;
  max-width: 14em;
  text-wrap: balance;
}
[data-theme="light"] .land-hero h1 { color: #0f1c2c; }
.land-lead {
  margin: 0 0 1.35rem;
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  line-height: 1.65;
  color: rgba(232, 242, 255, 0.82);
  max-width: 32em;
}
[data-theme="light"] .land-lead { color: rgba(20, 32, 51, 0.78); }
.land-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.75rem;
  align-items: center;
}
.land-cta .btn {
  min-height: 2.55rem;
  padding: 0.55rem 1.15rem;
}
.land-cta-glow {
  box-shadow: 0 0 0 0 rgba(45, 212, 191, 0.45);
  animation: land-cta-pulse 2.8s ease-in-out infinite;
}

.land-ticker {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: rgba(8, 14, 24, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
[data-theme="light"] .land-ticker {
  background: rgba(255, 255, 255, 0.78);
}
.land-ticker-track {
  display: flex;
  gap: 1.75rem;
  width: max-content;
  padding: 0.7rem 0;
  animation: land-ticker-move 32s linear infinite;
}
.land-ticker-track span {
  font-family: var(--display);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}
.land-ticker-track span::before {
  content: "◈";
  margin-right: 0.65rem;
  color: var(--accent);
  opacity: 0.7;
}

.land-scene {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 0;
  min-height: min(72vh, 640px);
  background: var(--bg0);
}
.land-scene--right { grid-template-columns: 1fr 1.15fr; }
.land-scene--right .land-scene-media { order: 2; }
.land-scene--right .land-scene-copy { order: 1; }
.land-scene-media {
  position: relative;
  min-height: 280px;
  overflow: hidden;
}
.land-scene-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1.1s ease;
}
.land-scene:hover .land-scene-media img { transform: scale(1.04); }
.land-scene-index {
  position: absolute;
  left: 0.9rem;
  bottom: 0.7rem;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.22);
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}
.land-scene-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.7rem;
  padding: clamp(1.6rem, 4vw, 3.2rem) clamp(1.2rem, 4vw, 3.4rem);
  background: linear-gradient(160deg, rgba(16, 26, 43, 0.92), rgba(10, 16, 26, 0.96));
  border-block: 1px solid var(--line);
}
[data-theme="light"] .land-scene-copy {
  background: linear-gradient(160deg, #fff, #f3f7fb);
}
.land-kicker {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
.land-scene-copy h2,
.land-close h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.land-scene-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.98rem;
  max-width: 36em;
}
.land-scene-copy .btn { align-self: flex-start; margin-top: 0.35rem; }

.land-close {
  position: relative;
  z-index: 1;
  text-align: left;
  padding: clamp(2.4rem, 6vw, 4.5rem) max(1rem, calc((100% - min(1240px, calc(100% - 2rem))) / 2));
  background:
    radial-gradient(ellipse 60% 80% at 12% 20%, var(--glow-a), transparent 55%),
    radial-gradient(ellipse 50% 70% at 88% 80%, var(--glow-b), transparent 50%),
    var(--bg1);
  border-top: 1px solid var(--line);
}
.land-close .land-brand { margin-bottom: 0.55rem; }
.land-close p {
  margin: 0.65rem 0 1.25rem;
  color: var(--muted);
  max-width: 34em;
  line-height: 1.7;
}

.land-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
}
.land-reveal.is-in {
  opacity: 1;
  transform: none;
}
.land-scene.land-reveal .land-scene-media {
  opacity: 0;
  transform: translateX(-18px);
  transition: opacity 0.75s ease 0.05s, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.05s;
}
.land-scene--right.land-reveal .land-scene-media { transform: translateX(18px); }
.land-scene.land-reveal.is-in .land-scene-media {
  opacity: 1;
  transform: none;
}

/* FAB / 弹层挂在 body，必须压过顶栏(200) 与导航抽屉 */
.land-ai-modal {
  position: fixed;
  inset: 0;
  z-index: 1400;
  display: grid;
  place-items: center;
  padding: max(1rem, env(safe-area-inset-top, 0px)) 1rem max(1rem, env(safe-area-inset-bottom, 0px));
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.22s ease, visibility 0.22s ease;
}
.land-ai-modal.is-open {
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
}
.land-ai-scrim {
  position: absolute;
  inset: 0;
  background: rgba(4, 10, 18, 0.58);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  cursor: pointer;
}
[data-theme="light"] .land-ai-scrim {
  background: rgba(15, 30, 50, 0.42);
}
.land-ai-panel {
  position: relative;
  z-index: 1;
  width: min(520px, calc(100vw - 2rem));
  height: min(72vh, 640px);
  max-height: calc(100dvh - 2rem);
  display: flex;
  flex-direction: column;
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: var(--shadow), 0 0 0 1px rgba(45, 212, 191, 0.08);
  transform: translateY(14px) scale(0.97);
  opacity: 0;
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.22s ease;
}
.land-ai-modal.is-open .land-ai-panel {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.land-ai-head {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 1rem 1rem 0.75rem;
  border-bottom: 1px solid var(--line);
  flex: 0 0 auto;
}
.land-ai-head strong {
  font-family: var(--display);
  font-size: 1.08rem;
}
.land-ai-log {
  flex: 1 1 auto;
  overflow: auto;
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  min-height: 0;
}
.land-ai-form {
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.45rem;
  background: var(--surface-soft);
  flex: 0 0 auto;
  border-radius: 0 0 18px 18px;
}
.land-ai-form textarea {
  width: 100%;
  resize: vertical;
  min-height: 4.5rem;
  font: inherit;
  color: var(--ink);
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
}
.land-ai-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}
#land-ai-status.is-err { color: var(--danger); }
#land-ai-workspace.is-pulse {
  border-color: var(--accent);
  color: var(--accent);
  animation: land-pulse 1.2s ease-in-out 2;
}

.land-ai-fab {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: fixed;
  left: 50%;
  bottom: max(1.35rem, calc(env(safe-area-inset-bottom, 0px) + 1.05rem));
  transform: translateX(-50%);
  z-index: 1350;
  width: 4.75rem;
  height: 4.75rem;
  min-width: 4.75rem;
  min-height: 4.75rem;
  border-radius: 999px;
  border: 1px solid rgba(4, 16, 22, 0.12);
  background: linear-gradient(145deg, #5eead4, #38bdf8);
  color: #041016;
  box-shadow: 0 12px 28px rgba(8, 20, 36, 0.45);
  cursor: pointer;
  font-family: var(--display);
  line-height: 1.05;
  padding: 0;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  animation: land-fab-in 0.55s ease both;
}
.land-ai-fab-ring {
  position: absolute;
  inset: -6px;
  border-radius: inherit;
  border: 2px solid rgba(94, 234, 212, 0.55);
  animation: land-fab-ring 2.4s ease-out infinite;
  pointer-events: none;
}
.land-ai-fab-label {
  position: relative;
  font-weight: 750;
  font-size: 1.08rem;
  letter-spacing: 0.04em;
}
.land-ai-fab-sub {
  position: relative;
  font-size: 0.64rem;
  font-weight: 650;
  opacity: 0.85;
}
body.land-ai-open .land-ai-fab {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) scale(0.86);
}
body.land-ai-open { overflow: hidden; }

@keyframes land-hero-ken {
  from { transform: scale(1.02) translate3d(0, 0, 0); }
  to { transform: scale(1.07) translate3d(0, -1.2%, 0); }
}
@keyframes land-orb-drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(4%, 6%, 0) scale(1.12); }
}
@keyframes land-grid-shift {
  from { background-position: 0 0; }
  to { background-position: 48px 48px; }
}
@keyframes land-shine {
  to { background-position: 220% center; }
}
@keyframes land-cta-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(45, 212, 191, 0); }
  50% { box-shadow: 0 0 0 10px rgba(45, 212, 191, 0.12); }
}
@keyframes land-ticker-move {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@keyframes land-pulse {
  0%, 100% { box-shadow: none; }
  50% { box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.28); }
}
@keyframes land-fab-in {
  from { opacity: 0; transform: translateX(-50%) translateY(18px) scale(0.92); }
  to { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
}
@keyframes land-fab-ring {
  0% { transform: scale(0.92); opacity: 0.7; }
  100% { transform: scale(1.28); opacity: 0; }
}

@media (max-width: 900px) {
  .land-scene,
  .land-scene--right {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .land-scene--right .land-scene-media,
  .land-scene--right .land-scene-copy { order: unset; }
  .land-scene-media { min-height: 42vw; max-height: 280px; }
  .land-hero { min-height: 88vh; }
  .land-hero-copy { padding: 4.5rem 0 2.4rem; }
  .land-ai-panel {
    width: min(100%, calc(100vw - 1.2rem));
    height: min(78dvh, 620px);
    border-radius: 16px;
  }
}

@media (min-width: 901px) {
  .land-ai-fab {
    left: auto;
    right: max(1.4rem, env(safe-area-inset-right, 0px));
    bottom: max(1.6rem, env(safe-area-inset-bottom, 0px));
    transform: none;
  }
  body.land-ai-open .land-ai-fab { transform: scale(0.86); }
  @keyframes land-fab-in {
    from { opacity: 0; transform: translateY(14px) scale(0.92); }
    to { opacity: 1; transform: none; }
  }
}

@media (prefers-reduced-motion: reduce) {
  .land-hero-media img,
  .land-scene-media img,
  .land-ai-panel,
  .land-ai-modal,
  .land-ai-fab,
  .land-orb,
  .land-brand span,
  .land-cta-glow,
  .land-ticker-track,
  .land-hero-grid,
  .land-ai-fab-ring,
  .land-reveal,
  .land-scene.land-reveal .land-scene-media {
    animation: none !important;
    transition: none !important;
  }
  .land-reveal,
  .land-scene.land-reveal .land-scene-media {
    opacity: 1 !important;
    transform: none !important;
  }
}