@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&family=ZCOOL+XiaoWei&display=swap");

:root {
  --it-ink: #06131c;
  --it-deep: #0c2433;
  --it-panel: rgba(14, 42, 58, 0.72);
  --it-glass: rgba(255, 255, 255, 0.08);
  --it-line: rgba(125, 230, 214, 0.28);
  --it-aqua: #2fe0c8;
  --it-coral: #ff6b7a;
  --it-sun: #ffd38a;
  --it-mist: #d7f6ef;
  --it-mute: #8fb4c4;
  --it-text: #e8f7f3;
  --it-radius: 22px;
  --it-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --it-max: 1120px;
  --it-font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --it-display: "ZCOOL XiaoWei", "Noto Sans SC", serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--it-font);
  color: var(--it-text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(47, 224, 200, 0.18), transparent 55%),
    radial-gradient(900px 500px at 95% 5%, rgba(255, 107, 122, 0.16), transparent 50%),
    linear-gradient(165deg, #041018 0%, #0a1f2c 42%, #07151f 100%);
  min-height: 100vh;
  line-height: 1.75;
  overflow-x: hidden;
}

body.it-has-sticky {
  padding-bottom: 24px;
}

body.it-has-sticky main {
  padding-top: 108px;
}

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

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

a:hover {
  color: var(--it-sun);
}

.it-wrap {
  width: min(100% - 2rem, var(--it-max));
  margin-inline: auto;
}

.it-promo {
  background: linear-gradient(90deg, rgba(6, 19, 28, 0.95), rgba(12, 36, 51, 0.92));
  border-bottom: 1px solid var(--it-line);
  padding: 0.65rem 0 0.4rem;
}

.it-promo-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--it-mute);
  text-align: center;
  margin: 0 0 0.35rem;
}

.it-promo-rail,
.it-sticky-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
  justify-items: center;
  padding: 0.25rem 0.75rem 0.55rem;
}

@media (min-width: 900px) {
  .it-promo-rail,
  .it-sticky-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

.it-dl-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  width: 100%;
  max-width: 72px;
  text-decoration: none;
  color: var(--it-mist);
}

.it-dl-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;
}

.it-dl-item:hover img {
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 12px 26px rgba(47, 224, 200, 0.25);
}

.it-dl-item span {
  font-size: 0.68rem;
  line-height: 1.2;
  text-align: center;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.it-dl-fallback {
  grid-column: 1 / -1;
  text-align: center;
  padding: 0.5rem;
}

.it-sticky-dl {
  position: fixed;
  left: 0;
  right: 0;
  top: 64px;
  z-index: 70;
  transform: translateY(calc(-100% - 64px));
  transition: transform 0.28s ease;
  background: rgba(6, 19, 28, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--it-line);
  box-shadow: var(--it-shadow);
}

.it-sticky-dl.is-visible {
  transform: translateY(0);
}

.it-sticky-caption {
  margin: 0;
  padding: 0.4rem 0 0;
  text-align: center;
  font-size: 0.72rem;
  color: var(--it-mute);
  letter-spacing: 0.08em;
}

.it-topnav {
  position: sticky;
  top: 0;
  z-index: 80;
  backdrop-filter: blur(18px);
  background: rgba(6, 19, 28, 0.78);
  border-bottom: 1px solid rgba(47, 224, 200, 0.16);
}

.it-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.it-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--it-text);
}

.it-brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.it-brand strong {
  font-family: var(--it-display);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.it-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}

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

.it-nav-links a:hover {
  color: var(--it-aqua);
}

.it-nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--it-line);
  border-radius: 12px;
  background: var(--it-glass);
  color: var(--it-text);
  cursor: pointer;
}

.it-nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

@media (max-width: 820px) {
  .it-nav-toggle {
    display: block;
  }

  .it-nav-links {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 64px;
    padding: 1rem;
    flex-direction: column;
    align-items: flex-start;
    background: rgba(8, 24, 34, 0.96);
    border: 1px solid var(--it-line);
    border-radius: 16px;
  }

  .it-nav-links.is-open {
    display: flex;
  }
}

.it-hero {
  position: relative;
  padding: 3.2rem 0 2.4rem;
  overflow: hidden;
}

.it-hero::before {
  content: "";
  position: absolute;
  inset: 8% -20% auto auto;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 122, 0.25), transparent 68%);
  pointer-events: none;
}

.it-hero-stage {
  display: grid;
  gap: 1.8rem;
  align-items: end;
}

@media (min-width: 900px) {
  .it-hero-stage {
    grid-template-columns: 1.15fr 0.85fr;
    min-height: 72vh;
  }
}

.it-hero-copy h1 {
  font-family: var(--it-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.25;
  margin: 0.4rem 0 1rem;
  font-weight: 400;
  max-width: 14ch;
}

.it-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--it-aqua);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.it-hero-kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--it-coral), var(--it-aqua));
}

.it-hero-lead {
  margin: 0;
  max-width: 36ch;
  color: var(--it-mute);
  font-size: 1.05rem;
}

.it-hero-visual {
  position: relative;
  justify-self: center;
}

.it-hero-visual img {
  width: min(100%, 320px);
  border-radius: 28px;
  box-shadow: var(--it-shadow);
  border: 1px solid rgba(255, 255, 255, 0.12);
  animation: it-float 5.5s ease-in-out infinite;
}

.it-orbit {
  position: absolute;
  inset: -18px;
  border: 1px dashed rgba(47, 224, 200, 0.35);
  border-radius: 36px;
  animation: it-spin 18s linear infinite;
  pointer-events: none;
}

@keyframes it-float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes it-spin {
  to {
    transform: rotate(360deg);
  }
}

.it-wave {
  height: 56px;
  background:
    radial-gradient(circle at 20% 0, rgba(47, 224, 200, 0.2), transparent 40%),
    linear-gradient(180deg, transparent, rgba(8, 28, 40, 0.65));
  mask-image: linear-gradient(180deg, transparent, #000 40%, #000);
}

.it-section {
  padding: 2.6rem 0;
}

.it-section h2 {
  font-family: var(--it-display);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  margin: 0 0 0.85rem;
  font-weight: 400;
}

.it-section h3 {
  font-size: 1.15rem;
  margin: 1.4rem 0 0.55rem;
  color: var(--it-sun);
}

.it-section p {
  margin: 0 0 1rem;
  color: rgba(232, 247, 243, 0.9);
}

.it-glass-panel {
  background: var(--it-panel);
  border: 1px solid var(--it-line);
  border-radius: var(--it-radius);
  padding: 1.35rem 1.25rem;
  backdrop-filter: blur(14px);
  box-shadow: var(--it-shadow);
}

.it-split {
  display: grid;
  gap: 1.4rem;
  align-items: center;
}

@media (min-width: 860px) {
  .it-split {
    grid-template-columns: 1fr 1fr;
  }

  .it-split.is-flip > :first-child {
    order: 2;
  }
}

.it-phone-shot {
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: var(--it-shadow);
  background: #000;
}

.it-phone-shot img {
  width: 100%;
}

.it-mosaic {
  display: grid;
  gap: 1rem;
}

@media (min-width: 760px) {
  .it-mosaic {
    grid-template-columns: repeat(3, 1fr);
  }
}

.it-tile {
  background: linear-gradient(160deg, rgba(18, 48, 64, 0.9), rgba(10, 28, 40, 0.88));
  border: 1px solid rgba(47, 224, 200, 0.18);
  border-radius: 18px;
  padding: 1.1rem;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.it-tile:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 122, 0.45);
}

.it-tile h3 {
  margin-top: 0.35rem;
}

.it-tile p {
  margin-bottom: 0;
  font-size: 0.95rem;
  color: var(--it-mute);
}

.it-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1rem 0 0;
}

.it-chip {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 211, 138, 0.35);
  color: var(--it-sun);
  font-size: 0.82rem;
}

.it-prose + .it-prose {
  margin-top: 1rem;
}

.it-longform p {
  text-indent: 0;
}

.it-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.2rem;
}

.it-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.it-btn-primary {
  background: linear-gradient(120deg, var(--it-coral), #ff8f6b);
  color: #1a0b10;
  box-shadow: 0 10px 24px rgba(255, 107, 122, 0.28);
}

.it-btn-ghost {
  background: transparent;
  border-color: var(--it-line);
  color: var(--it-mist);
}

.it-crumb {
  padding: 1rem 0 0;
  font-size: 0.88rem;
  color: var(--it-mute);
}

.it-crumb a {
  color: var(--it-aqua);
  text-decoration: none;
}

.it-crumb span {
  margin: 0 0.35rem;
  opacity: 0.6;
}

.it-page-title {
  font-family: var(--it-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin: 0.6rem 0 1rem;
  font-weight: 400;
}

.it-legal .it-section {
  padding-top: 1.2rem;
}

.it-footer {
  margin-top: 2rem;
  padding: 2rem 0 2.4rem;
  border-top: 1px solid rgba(47, 224, 200, 0.16);
  background: rgba(3, 12, 18, 0.65);
}

.it-footer-grid {
  display: grid;
  gap: 1.2rem;
}

@media (min-width: 760px) {
  .it-footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.it-footer h3 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  color: var(--it-sun);
}

.it-footer a {
  display: block;
  color: var(--it-mute);
  text-decoration: none;
  margin: 0.25rem 0;
}

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

.it-copy {
  margin-top: 1.4rem;
  font-size: 0.82rem;
  color: rgba(143, 180, 196, 0.85);
}

.it-error-shell {
  min-height: 58vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 0;
}

.it-error-shell strong {
  display: block;
  font-family: var(--it-display);
  font-size: clamp(3rem, 12vw, 6rem);
  color: var(--it-coral);
  line-height: 1;
}

.it-timeline {
  display: grid;
  gap: 1rem;
  border-left: 2px solid rgba(47, 224, 200, 0.35);
  padding-left: 1.1rem;
  margin: 1.2rem 0;
}

.it-timeline article {
  position: relative;
  padding: 0.2rem 0 0.6rem;
}

.it-timeline article::before {
  content: "";
  position: absolute;
  left: -1.42rem;
  top: 0.55rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--it-coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 122, 0.2);
}

.it-quote {
  margin: 1.2rem 0;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--it-aqua);
  background: rgba(47, 224, 200, 0.08);
  border-radius: 0 14px 14px 0;
  color: var(--it-mist);
}

.it-gallery {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 860px) {
  .it-gallery {
    grid-template-columns: repeat(4, 1fr);
  }
}

.it-gallery figure {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.it-gallery figcaption {
  padding: 0.45rem 0.55rem;
  font-size: 0.75rem;
  color: var(--it-mute);
  background: rgba(0, 0, 0, 0.35);
}

.it-fade-up {
  animation: it-rise 0.8s ease both;
}

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