:root {
  --inksea-ink: #07131a;
  --inksea-deep: #0d2430;
  --inksea-panel: rgba(14, 42, 54, 0.72);
  --inksea-line: rgba(123, 223, 242, 0.22);
  --inksea-coral: #f07167;
  --inksea-amber: #f4a261;
  --inksea-aqua: #7bdff2;
  --inksea-mint: #9ef0d0;
  --inksea-paper: #e8f4f6;
  --inksea-mute: #9bb7c2;
  --inksea-glow: rgba(240, 113, 103, 0.35);
  --inksea-radius: 22px;
  --inksea-max: 1080px;
  --inksea-font-display: "ZCOOL XiaoWei", "Ma Shan Zheng", "Songti SC", serif;
  --inksea-font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--inksea-font-body);
  color: var(--inksea-paper);
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(240, 113, 103, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 8%, rgba(123, 223, 242, 0.16), transparent 50%),
    linear-gradient(180deg, #061018 0%, var(--inksea-ink) 40%, #0a1a22 100%);
  min-height: 100vh;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--inksea-aqua);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--inksea-amber);
}

.inksea-shell {
  width: min(100% - 28px, var(--inksea-max));
  margin-inline: auto;
}

.inksea-promo-wrap {
  border-bottom: 1px solid var(--inksea-line);
  background: rgba(7, 19, 26, 0.85);
  backdrop-filter: blur(14px);
}

.inksea-promo-rail,
.inksea-sticky-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px 8px;
  padding: 12px 0;
}

.inksea-promo-item,
.inksea-sticky-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-decoration: none;
  color: var(--inksea-mute);
  font-size: 11px;
}

.inksea-promo-item img,
.inksea-sticky-item img {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.inksea-promo-item:hover img,
.inksea-sticky-item:hover img {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 12px 28px var(--inksea-glow);
}

.inksea-promo-item span,
.inksea-sticky-item span {
  max-width: 72px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

.inksea-sticky-rail {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 80;
  width: min(100% - 20px, var(--inksea-max));
  margin-inline: auto;
  padding: 10px 12px;
  border: 1px solid var(--inksea-line);
  border-radius: 18px;
  background: rgba(8, 24, 32, 0.92);
  backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-12px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.inksea-sticky-rail.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

body.has-sticky-rail {
  padding-top: 0;
}

.inksea-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  border-bottom: 1px solid var(--inksea-line);
  background: rgba(7, 19, 26, 0.88);
  backdrop-filter: blur(18px);
}

.inksea-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}

.inksea-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--inksea-paper);
  text-decoration: none;
  font-family: var(--inksea-font-display);
  font-size: 1.35rem;
}

.inksea-brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.inksea-nav-links {
  display: none;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.inksea-nav-links a {
  color: var(--inksea-mute);
  text-decoration: none;
  font-size: 0.92rem;
}

.inksea-nav-links a:hover,
.inksea-nav-links a.is-current {
  color: var(--inksea-aqua);
}

.inksea-nav-toggle {
  width: 42px;
  height: 42px;
  border: 1px solid var(--inksea-line);
  border-radius: 12px;
  background: transparent;
  color: var(--inksea-paper);
  cursor: pointer;
}

.inksea-nav-links.is-open {
  display: grid;
  position: absolute;
  top: 64px;
  left: 14px;
  right: 14px;
  padding: 14px;
  border: 1px solid var(--inksea-line);
  border-radius: 16px;
  background: rgba(8, 24, 32, 0.96);
}

.inksea-hero {
  position: relative;
  padding: 42px 0 28px;
  overflow: hidden;
}

.inksea-hero::before {
  content: "";
  position: absolute;
  inset: 8% -20% auto auto;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 162, 97, 0.25), transparent 70%);
  pointer-events: none;
  animation: inksea-drift 9s ease-in-out infinite alternate;
}

.inksea-hero-title {
  margin: 0 0 14px;
  font-family: var(--inksea-font-display);
  font-size: clamp(1.85rem, 6vw, 2.8rem);
  line-height: 1.25;
  background: linear-gradient(120deg, #fff 10%, var(--inksea-aqua) 45%, var(--inksea-coral) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.inksea-hero-lead {
  margin: 0;
  max-width: 36em;
  color: var(--inksea-mute);
  font-size: 1.02rem;
}

.inksea-hero-visual {
  margin-top: 28px;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--inksea-line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  animation: inksea-rise 0.9s ease both;
}

.inksea-hero-visual img {
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 520px;
  object-fit: cover;
  object-position: top;
}

.inksea-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 18px 0 6px;
  color: var(--inksea-mute);
  font-size: 0.88rem;
}

.inksea-crumb a {
  color: var(--inksea-mute);
  text-decoration: none;
}

.inksea-crumb a:hover {
  color: var(--inksea-aqua);
}

.inksea-crumb span[aria-hidden="true"] {
  opacity: 0.5;
}

.inksea-section {
  padding: 34px 0;
}

.inksea-section h2 {
  margin: 0 0 12px;
  font-family: var(--inksea-font-display);
  font-size: clamp(1.45rem, 4vw, 2rem);
  color: #fff;
}

.inksea-section h3 {
  margin: 22px 0 10px;
  font-size: 1.15rem;
  color: var(--inksea-amber);
}

.inksea-section p {
  margin: 0 0 14px;
  color: #d5e8ee;
}

.inksea-glass {
  padding: 22px;
  border: 1px solid var(--inksea-line);
  border-radius: var(--inksea-radius);
  background: var(--inksea-panel);
  backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.inksea-split {
  display: grid;
  gap: 18px;
  align-items: center;
}

.inksea-split img {
  width: 100%;
  border-radius: 20px;
  border: 1px solid var(--inksea-line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.inksea-mosaic {
  display: grid;
  gap: 14px;
}

.inksea-tile {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--inksea-line);
  background: linear-gradient(160deg, rgba(123, 223, 242, 0.08), rgba(240, 113, 103, 0.08));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.inksea-tile:hover {
  transform: translateY(-4px);
  border-color: rgba(244, 162, 97, 0.45);
}

.inksea-tile h3 {
  margin-top: 0;
}

.inksea-tile p:last-child {
  margin-bottom: 0;
}

.inksea-prose p {
  text-indent: 0;
}

.inksea-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.inksea-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.inksea-btn:hover {
  transform: translateY(-2px);
}

.inksea-btn-coral {
  color: #1a0d0c;
  background: linear-gradient(120deg, var(--inksea-coral), var(--inksea-amber));
  box-shadow: 0 10px 28px var(--inksea-glow);
}

.inksea-btn-ghost {
  color: var(--inksea-paper);
  border-color: var(--inksea-line);
  background: rgba(255, 255, 255, 0.03);
}

.inksea-legal {
  padding-bottom: 60px;
}

.inksea-legal h1 {
  margin: 8px 0 18px;
  font-family: var(--inksea-font-display);
  font-size: clamp(1.7rem, 5vw, 2.4rem);
}

.inksea-footer {
  margin-top: 40px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--inksea-line);
  color: var(--inksea-mute);
  font-size: 0.9rem;
}

.inksea-footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-bottom: 14px;
}

.inksea-footer-links a {
  color: var(--inksea-mute);
  text-decoration: none;
}

.inksea-footer-links a:hover {
  color: var(--inksea-aqua);
}

.inksea-error {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 40px 0;
}

.inksea-error h1 {
  margin: 0 0 10px;
  font-family: var(--inksea-font-display);
  font-size: clamp(2.4rem, 10vw, 4rem);
  color: var(--inksea-coral);
}

.inksea-float-orb {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--inksea-aqua);
  opacity: 0.35;
  filter: blur(1px);
  animation: inksea-pulse 4.5s ease-in-out infinite;
}

@keyframes inksea-drift {
  from {
    transform: translate(0, 0);
  }
  to {
    transform: translate(-24px, 18px);
  }
}

@keyframes inksea-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes inksea-pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.25;
  }
  50% {
    transform: scale(1.35);
    opacity: 0.5;
  }
}

@media (min-width: 720px) {
  .inksea-promo-rail,
  .inksea-sticky-rail {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .inksea-nav-toggle {
    display: none;
  }

  .inksea-nav-links {
    display: flex;
  }

  .inksea-split {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .inksea-split.is-reverse {
    grid-template-columns: 0.95fr 1.05fr;
  }

  .inksea-split.is-reverse .inksea-copy {
    order: 2;
  }

  .inksea-mosaic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .inksea-hero-visual img {
    aspect-ratio: 16 / 10;
    max-height: 420px;
  }

  .inksea-sticky-rail {
    top: 72px;
  }
}

@media (min-width: 980px) {
  .inksea-mosaic.is-trio {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}