:root {
  --ink: #1a2332;
  --ink-soft: #6b7785;
  --paper: #f5f8fc;
  --mint: #e8f1ff;
  --teal: #2f7bff;
  --teal-deep: #1f63e0;
  --sky: #8eb6ff;
  --sand: #eef4ff;
  --line: #e8eef5;
  --radius: 14px;
  --shadow-soft: 0 24px 60px rgba(47, 123, 255, 0.12);
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --orange: #ff7a18;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.wrap {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
}

/* —— Nav —— */
.nav {
  position: absolute;
  inset: 0 0 auto;
  z-index: 20;
  padding: 1.25rem 0;
}

.nav.is-solid {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

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

.logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(145deg, #4b92ff, var(--teal));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(47, 123, 255, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
}

.nav-links a.is-active {
  font-weight: 700;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  border-radius: 999px;
  background: linear-gradient(180deg, #ff8a2b, var(--orange));
  color: #fff !important;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 8px 18px rgba(255, 122, 24, 0.28);
  transition: transform 0.25s ease, filter 0.25s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  filter: brightness(1.03);
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  width: 42px;
  height: 42px;
  cursor: pointer;
  border-radius: 10px;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding: 7.5rem 0 4.5rem;
  isolation: isolate;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 80% 55% at 70% 20%, rgba(142, 182, 255, 0.45), transparent 60%),
    radial-gradient(ellipse 60% 50% at 15% 80%, rgba(47, 123, 255, 0.18), transparent 55%),
    linear-gradient(165deg, #f3f8ff 0%, #f5f8fc 42%, #e8f0ff 100%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 31, 42, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 31, 42, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  opacity: 0.7;
}

.hero-orbit {
  position: absolute;
  width: 520px;
  height: 520px;
  right: -60px;
  top: 8%;
  border-radius: 50%;
  border: 1px solid rgba(47, 123, 255, 0.18);
  z-index: -1;
  animation: orbit-spin 28s linear infinite;
}

.hero-orbit::before,
.hero-orbit::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: var(--teal);
}

.hero-orbit::before {
  width: 10px;
  height: 10px;
  top: 18%;
  left: 12%;
  opacity: 0.55;
}

.hero-orbit::after {
  width: 14px;
  height: 14px;
  bottom: 22%;
  right: 16%;
  background: var(--sky);
  opacity: 0.7;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}

.hero-copy {
  max-width: 34rem;
}

.brand-hero {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.4rem, 8vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  margin-bottom: 1.35rem;
  opacity: 0;
  transform: translateY(22px);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.brand-hero span {
  display: block;
  color: var(--teal);
  font-size: 0.42em;
  letter-spacing: 0.18em;
  font-weight: 700;
  margin-bottom: 0.55rem;
  text-transform: uppercase;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.2vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 0.9rem;
  opacity: 0;
  transform: translateY(22px);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.22s forwards;
}

.hero-lead {
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 30rem;
  margin-bottom: 2rem;
  opacity: 0;
  transform: translateY(22px);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.34s forwards;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transform: translateY(22px);
  animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.46s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: 52px;
  padding: 0.85rem 1.45rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.98rem;
  border: 1.5px solid transparent;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  cursor: pointer;
}

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

.btn-primary {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 14px 30px rgba(47, 123, 255, 0.28);
}

.btn-primary:hover {
  background: var(--teal-deep);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.55);
  border-color: rgba(11, 31, 42, 0.12);
  color: var(--ink);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  border-color: var(--teal);
  color: var(--teal-deep);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.hero-visual {
  position: relative;
  opacity: 0;
  transform: translateY(28px) scale(0.98);
  animation: rise-scale 1.05s cubic-bezier(0.22, 1, 0.36, 1) 0.28s forwards;
}

.screen {
  position: relative;
  border-radius: 22px;
  background: linear-gradient(160deg, #1a2740 0%, #152033 100%);
  padding: 1rem;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  aspect-ratio: 16 / 11;
}

.screen::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(142, 182, 255, 0.22), transparent 35%),
    radial-gradient(circle at 80% 70%, rgba(47, 123, 255, 0.28), transparent 40%);
  pointer-events: none;
}

.screen-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.9rem;
  position: relative;
  z-index: 1;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}

.dot:nth-child(1) { background: #ff7b72; }
.dot:nth-child(2) { background: #ffd166; }
.dot:nth-child(3) { background: #7bd88f; }

.screen-body {
  position: relative;
  z-index: 1;
  height: calc(100% - 1.5rem);
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cpath fill='none' stroke='%237ec8d4' stroke-opacity='0.18' stroke-width='1' d='M0 80h160M80 0v160'/%3E%3C/svg%3E");
  overflow: hidden;
  display: grid;
  place-items: center;
}

.remote-scene {
  width: min(88%, 360px);
  display: grid;
  gap: 1rem;
  animation: float-y 5.5s ease-in-out infinite;
}

.link-pulse {
  height: 2px;
  width: 70%;
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, var(--sky), var(--teal), transparent);
  position: relative;
  overflow: hidden;
}

.link-pulse::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 28%;
  background: #fff;
  filter: blur(2px);
  animation: pulse-move 2.2s ease-in-out infinite;
}

.device {
  border-radius: 12px;
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #eef4ff;
  backdrop-filter: blur(6px);
}

.device strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.2rem;
}

.device small {
  color: rgba(238, 244, 255, 0.7);
  font-size: 0.82rem;
}

.device.local {
  background: rgba(47, 123, 255, 0.28);
  border-color: rgba(142, 182, 255, 0.35);
}

.progress {
  margin-top: 0.7rem;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.progress > i {
  display: block;
  height: 100%;
  width: 68%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--sky), var(--teal));
  animation: progress-grow 2.8s ease-in-out infinite alternate;
}

/* —— Page hero (inner) —— */
.page-hero {
  padding: 5.5rem 0 3rem;
  background:
    radial-gradient(ellipse 70% 60% at 85% 10%, rgba(142, 182, 255, 0.35), transparent 55%),
    radial-gradient(ellipse 50% 40% at 10% 90%, rgba(47, 123, 255, 0.12), transparent 50%),
    linear-gradient(165deg, #f3f8ff 0%, #f5f8fc 100%);
  border-bottom: 1px solid var(--line);
}

.page-hero .eyebrow {
  color: var(--teal);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.82rem;
  margin-bottom: 0.75rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 0.85rem;
  max-width: 18ch;
}

.page-hero p {
  color: var(--ink-soft);
  font-size: 1.08rem;
  max-width: 36rem;
}

/* —— Sections —— */
section {
  padding: 5.5rem 0;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2.75rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.5vw, 2.55rem);
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.section-head p {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.features {
  background: #fff;
  border-block: 1px solid var(--line);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem 2rem;
}

.feature h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.55rem;
}

.feature p {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.feature-index {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--teal);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
}

.how {
  background:
    radial-gradient(ellipse 50% 40% at 100% 0%, rgba(142, 182, 255, 0.22), transparent 60%),
    var(--paper);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  padding: 1.6rem 1.4rem 1.7rem;
  border-top: 2px solid var(--teal);
  background: rgba(255, 255, 255, 0.55);
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
  color: var(--teal);
  margin-bottom: 1rem;
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.45rem;
  letter-spacing: -0.02em;
}

.step p {
  color: var(--ink-soft);
  font-size: 0.96rem;
}

.download {
  background: linear-gradient(160deg, #1a2f55 0%, #152844 55%, #101f38 100%);
  color: #eef4ff;
  position: relative;
  overflow: hidden;
}

.download::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -120px;
  top: -160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 123, 255, 0.4), transparent 65%);
  pointer-events: none;
}

.download .section-head,
.download .platform-grid,
.download .note {
  position: relative;
  z-index: 1;
}

.download .section-head p {
  color: rgba(238, 244, 255, 0.72);
}

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

.platform {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem 1.4rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.platform:hover {
  background: rgba(47, 123, 255, 0.18);
  border-color: rgba(142, 182, 255, 0.35);
  transform: translateY(-2px);
}

.platform h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.platform p {
  color: rgba(238, 244, 255, 0.65);
  font-size: 0.9rem;
  margin-top: 0.2rem;
}

.platform .get {
  flex-shrink: 0;
  padding: 0.65rem 1.1rem;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-weight: 700;
  font-size: 0.9rem;
}

.note {
  margin-top: 1.5rem;
  color: rgba(238, 244, 255, 0.55);
  font-size: 0.88rem;
}

/* —— News —— */
.news-list {
  display: grid;
  gap: 1rem;
}

.news-item {
  display: grid;
  grid-template-columns: 7rem 1fr auto;
  gap: 1.25rem;
  align-items: center;
  padding: 1.35rem 1.4rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.news-item:hover {
  border-color: rgba(47, 123, 255, 0.35);
  transform: translateY(-2px);
}

.news-date {
  font-family: var(--font-display);
  font-weight: 800;
  color: var(--teal);
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.news-item h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-bottom: 0.35rem;
}

.news-item p {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.news-more {
  color: var(--teal-deep);
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  margin-top: 2.5rem;
}

.pagination a,
.pagination span {
  min-width: 42px;
  height: 42px;
  padding: 0 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink-soft);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.pagination a:hover {
  border-color: rgba(47, 123, 255, 0.4);
  color: var(--teal-deep);
}

.pagination .is-current {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

.pagination .is-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.article {
  padding: 3rem 0 5rem;
}

.article-wrap {
  width: min(760px, calc(100% - 2.5rem));
  margin-inline: auto;
}

.article-meta {
  color: var(--ink-soft);
  font-size: 0.92rem;
  margin-bottom: 1.25rem;
}

.article-meta a {
  color: var(--teal-deep);
  font-weight: 600;
}

.article h1 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  letter-spacing: -0.04em;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.article-body p {
  margin-bottom: 1.15rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.article-body h2 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  margin: 2rem 0 0.85rem;
  color: var(--ink);
}

.article-body ul {
  margin: 0 0 1.25rem 1.2rem;
  color: var(--ink-soft);
}

.article-body li {
  margin-bottom: 0.45rem;
}

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-weight: 600;
  font-size: 0.95rem;
}

.article-nav a:hover {
  color: var(--teal);
}

.home-news {
  background: #fff;
  border-top: 1px solid var(--line);
}

.home-news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.home-news-card {
  padding-top: 1rem;
  border-top: 2px solid var(--teal);
}

.home-news-card time {
  display: block;
  color: var(--teal);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.55rem;
}

.home-news-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

.home-news-card p {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

footer {
  padding: 2.25rem 0 2.75rem;
  background: #fff;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes rise-scale {
  to {
    opacity: 1;
    transform: none;
  }
}

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

@keyframes pulse-move {
  0% { left: -10%; opacity: 0; }
  25% { opacity: 1; }
  100% { left: 110%; opacity: 0; }
}

@keyframes progress-grow {
  from { width: 42%; }
  to { width: 86%; }
}

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

@media (max-width: 900px) {
  .hero-grid,
  .feature-list,
  .steps,
  .platform-grid,
  .home-news-list {
    grid-template-columns: 1fr;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .hero {
    padding-top: 6.5rem;
    align-items: start;
  }

  .hero-orbit {
    width: 320px;
    height: 320px;
    top: auto;
    bottom: 18%;
    opacity: 0.55;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 0.35rem);
    right: 1.25rem;
    left: 1.25rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 0.6rem;
    box-shadow: var(--shadow-soft);
  }

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

  .nav-links a {
    padding: 0.85rem 1rem;
    border-radius: 10px;
  }

  .nav-links a:hover {
    background: var(--sand);
  }

  .nav-cta {
    margin: 0.35rem 0.5rem 0.5rem;
    text-align: center;
  }

  .menu-toggle {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .brand-hero,
  .hero h1,
  .hero-lead,
  .cta-row,
  .hero-visual,
  .reveal {
    opacity: 1;
    transform: none;
  }
}


/* Shared topbar (match homepage) */
.uu-topbar {
  background: linear-gradient(90deg, #eaf2ff, #f3f7ff);
  border-bottom: 1px solid #e4ecf7;
  font-size: 0.78rem;
  color: #5d6b7c;
}
.uu-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 34px;
}
.uu-topbar-news {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.uu-topbar-news em {
  font-style: normal;
  color: var(--teal);
  font-weight: 700;
}
.uu-topbar-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}
.uu-topbar-links a:hover { color: var(--teal); }
.nav-links a.is-active { color: var(--teal); }
.page-hero .eyebrow { color: var(--teal); }
@media (max-width: 900px) {
  .uu-topbar-links { display: none; }
}