@font-face {
  font-family: "Noto Serif SC Hero";
  src: url("assets/fonts/noto-serif-sc-hero.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg: #eef5ff;
  --panel: rgba(255, 255, 255, 0.78);
  --ink: #071c44;
  --text: #213a63;
  --muted: #70809b;
  --blue: #1768f2;
  --cyan: #49c7ff;
  --line: rgba(20, 55, 105, 0.14);
  --shadow: 0 24px 80px rgba(23, 74, 139, 0.18);
  --radius: 8px;
  --header: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

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

button {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header);
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto minmax(92px, 1fr);
  align-items: center;
  padding: 0 36px;
  background: rgba(4, 17, 29, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
  animation: header-reveal 1.15s 0.12s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-logo {
  width: 58px;
  height: 58px;
  object-fit: contain;
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, 0.28));
}

.site-nav {
  display: flex;
  align-items: center;
  justify-self: center;
  gap: 28px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 800;
}

.site-nav a,
.nav-dropdown-toggle {
  position: relative;
  padding: 24px 0;
}

.site-nav a::after,
.nav-dropdown-toggle::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after,
.nav-dropdown-toggle:hover::after,
.nav-dropdown-toggle:focus-visible::after,
.nav-dropdown.is-open .nav-dropdown-toggle::after {
  transform: scaleX(1);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  border: 0;
  color: inherit;
  background: transparent;
  cursor: pointer;
  font-weight: inherit;
}

.nav-dropdown-menu {
  position: absolute;
  left: 50%;
  top: calc(100% - 10px);
  min-width: 148px;
  display: grid;
  gap: 4px;
  padding: 10px;
  border: 1px solid rgba(20, 55, 105, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 18px 46px rgba(7, 28, 68, 0.14);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown.is-open .nav-dropdown-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.nav-dropdown-menu a,
.nav-dropdown-menu button {
  appearance: none;
  -webkit-appearance: none;
  display: block;
  width: 100%;
  padding: 10px 12px;
  border: 0;
  border-radius: 6px;
  color: var(--ink);
  background: transparent;
  text-align: left;
  white-space: nowrap;
  cursor: pointer;
}

.nav-dropdown-menu a::after {
  content: none;
}

.nav-dropdown-menu a:hover,
.nav-dropdown-menu button:hover,
.nav-dropdown-menu a:focus-visible,
.nav-dropdown-menu button:focus-visible {
  background: rgba(23, 104, 242, 0.08);
}

.lang-toggle {
  justify-self: end;
  min-width: 58px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
  font-weight: 900;
  cursor: pointer;
}

.lang-toggle:hover,
.lang-toggle:focus-visible {
  border-color: rgba(73, 199, 255, 0.72);
  color: var(--cyan);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 0;
  border-radius: 50%;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.menu-toggle span:not(.sr-only) {
  width: 22px;
  height: 2px;
  background: currentColor;
}

.page {
  min-height: 100vh;
  min-height: 100svh;
  padding: calc(var(--header) + 64px) clamp(18px, 5vw, 72px) 76px;
}

.page:not(.page-home) {
  content-visibility: auto;
  contain-intrinsic-size: auto 100vh;
}

.site-reveal-enabled main :is(
    .section-head > *,
    .advantage-card > *,
    .phone-caption > *,
    .scene-card > *,
    .feature-hero > *,
    .feature-module-media,
    .feature-module-copy > *,
    .contact-heading > *,
    .contact-brand > :not(img),
    .contact-info > *,
    .contact-links > *,
    .wechat-card > :not(img),
    .sub-hero > *,
    .video-tile-copy > *,
    .scene-copy > *,
    .scene-empty > *
  ) {
  opacity: 0;
  filter: blur(7px);
  transform: translateY(30px);
}

.site-reveal-enabled main [data-reveal] {
  transition:
    opacity 1s cubic-bezier(0, 0, 0.2, 1),
    filter 1s cubic-bezier(0, 0, 0.2, 1),
    transform 1s cubic-bezier(0, 0, 0.2, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

.site-reveal-enabled main [data-reveal].is-revealed {
  opacity: 1;
  filter: blur(0);
  transform: translateY(0);
}

.page-home {
  position: relative;
  display: grid;
  justify-items: center;
  align-items: center;
  overflow: hidden;
  padding: var(--header) clamp(18px, 5vw, 78px) 0;
  background:
    radial-gradient(circle at 12% 18%, rgba(74, 91, 255, 0.15), transparent 30%),
    linear-gradient(135deg, #061e30 0%, #082d3d 54%, #062636 100%);
}

.home-visual,
.page-bg-visual,
.section-bg-visual {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.home-visual {
  inset-block-start: var(--header);
  height: calc(100% - var(--header));
  object-position: center;
}

.hero-bg-video {
  z-index: 0;
  background: #061e30;
  filter: saturate(1.04) contrast(1.03);
  transform: translateZ(0);
}

.home-shade {
  z-index: 0;
  position: absolute;
  inset: var(--header) 0 0;
  background:
    linear-gradient(90deg, rgba(3, 14, 25, 0.35), rgba(3, 14, 25, 0.04) 52%, rgba(3, 14, 25, 0.28)),
    linear-gradient(180deg, rgba(3, 14, 25, 0.12), rgba(3, 14, 25, 0.38));
}

.home-content {
  position: relative;
  z-index: 1;
  width: min(1040px, 100%);
  display: grid;
  justify-items: center;
  text-align: center;
}

.hero-title {
  margin: 0;
  max-width: min(1120px, 96vw);
  color: rgba(255, 255, 255, 0.94);
  font-family: "Noto Serif SC Hero", "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0;
  text-shadow:
    0 24px 62px rgba(7, 28, 68, 0.42),
    0 3px 16px rgba(7, 28, 68, 0.22);
}

.hero-title span {
  display: inline-block;
  width: fit-content;
  white-space: pre-line;
  will-change: opacity, filter, transform;
}

html[lang="zh-CN"] .hero-title span {
  white-space: pre;
}

.hero-intro-pending.hero-intro-active .hero-title span {
  animation: hero-text-reveal 1.15s 0.22s cubic-bezier(0, 0, 0.2, 1) both;
}

.hero-corner-link {
  position: absolute;
  z-index: 2;
  top: calc(var(--header) + 34px);
  right: clamp(18px, 5vw, 78px);
  display: grid;
  justify-items: end;
  gap: 7px;
  color: rgba(225, 237, 245, 0.72);
  font-weight: 400;
  line-height: 1.2;
  text-align: right;
  animation: corner-reveal 1.7s 0.95s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero-corner-link small {
  font-size: 0.9rem;
}

.hero-corner-link span {
  position: relative;
  font-size: 1.14rem;
  font-weight: 600;
}

.hero-corner-link span::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -5px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.hero-corner-link:hover {
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

.section-head {
  position: relative;
  z-index: 1;
  width: min(1080px, 100%);
  margin: 0 auto 38px;
}

.section-head.compact {
  margin-bottom: 28px;
  text-align: center;
}

.section-head h2,
.sub-hero h1,
.scene-copy h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(2.4rem, 5vw, 5rem);
  line-height: 1.05;
  font-weight: 950;
}

.section-head p:not(.eyebrow),
.sub-hero p:not(.eyebrow),
.scene-copy p:not(.eyebrow) {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--text);
  font-size: 1.08rem;
  line-height: 1.8;
}

.case-head {
  margin-bottom: 18px;
}

.page-promotion {
  position: relative;
  overflow: hidden;
  background: #f7fbff;
}

.section-bg-image {
  opacity: 0.94;
  object-position: center;
}

.page-promotion .section-video-shade {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(246, 251, 255, 0.48)),
    radial-gradient(circle at 18% 12%, rgba(73, 199, 255, 0.12), transparent 34%),
    radial-gradient(circle at 82% 20%, rgba(23, 104, 242, 0.1), transparent 36%);
}

.phone-carousel {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  min-height: 620px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
}

.phone-stage {
  position: relative;
  width: min(880px, 100%);
  height: 620px;
  touch-action: pan-y;
}

.phone-card {
  position: absolute;
  left: 50%;
  top: 50%;
  width: min(340px, 76vw);
  aspect-ratio: 9 / 16;
  overflow: hidden;
  border: 10px solid #101b2d;
  border-radius: 34px;
  background: #071523;
  box-shadow: 0 30px 80px rgba(8, 28, 60, 0.26);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.72);
  transition: transform 420ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 300ms ease, filter 300ms ease;
}

.case-media,
.case-media video,
.poster-play,
.poster-play img,
.phone-card img {
  width: 100%;
  height: 100%;
}

.case-media {
  position: absolute;
  inset: 0;
}

.case-media video,
.poster-play,
.poster-play img,
.phone-card img {
  object-fit: cover;
}

.poster-play {
  position: relative;
  display: block;
  padding: 0;
  border: 0;
  color: #fff;
  background: #071523;
  cursor: pointer;
  touch-action: manipulation;
}

.poster-play::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 28, 68, 0.02), rgba(7, 28, 68, 0.28));
  transition: opacity 180ms ease;
}

.poster-play:hover::after,
.poster-play:focus-visible::after {
  opacity: 0.52;
}

.play-icon {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 1;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 16px 42px rgba(7, 28, 68, 0.22);
  transform: translate(-50%, -50%);
}

.play-icon::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 18px;
  width: 0;
  height: 0;
  border-block: 11px solid transparent;
  border-left: 17px solid var(--blue);
}

.phone-card.is-active {
  z-index: 3;
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, -50%) scale(1);
}

.phone-card.is-prev {
  z-index: 2;
  opacity: 0.56;
  filter: saturate(0.84);
  transform: translate(calc(-50% - 290px), -50%) scale(0.78) rotateY(10deg);
}

.phone-card.is-next {
  z-index: 2;
  opacity: 0.56;
  filter: saturate(0.84);
  transform: translate(calc(-50% + 290px), -50%) scale(0.78) rotateY(-10deg);
}

.phone-caption {
  position: absolute;
  inset: auto 0 0;
  z-index: 2;
  padding: 60px 20px 22px;
  color: #fff;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.72), transparent);
  transition: opacity 180ms ease;
}

.phone-card.is-playing .phone-caption {
  opacity: 0;
  pointer-events: none;
}

.phone-caption span {
  color: #8edfff;
  font-size: 0.8rem;
  font-weight: 900;
}

.phone-caption h3 {
  margin: 6px 0 0;
  font-size: 1.45rem;
}

.carousel-arrow {
  position: absolute;
  z-index: 5;
  top: 50%;
  width: 50px;
  height: 50px;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  font-size: 2.2rem;
  line-height: 1;
  cursor: pointer;
}

.carousel-arrow.prev {
  left: 0;
}

.carousel-arrow.next {
  right: 0;
}

.carousel-dots {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  gap: 8px;
}

.carousel-dots button {
  width: 9px;
  height: 9px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(7, 28, 68, 0.22);
}

.carousel-dots button.active {
  width: 28px;
  border-radius: 999px;
  background: var(--blue);
}

.page-advantages {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 18%, rgba(74, 91, 255, 0.15), transparent 30%),
    linear-gradient(135deg, #061e30 0%, #082d3d 54%, #062636 100%);
}

.page-advantages::before {
  content: none;
}

.page-advantages .section-head {
  width: min(1180px, 100%);
  margin-bottom: 44px;
}

.page-advantages .section-head h2 {
  color: #ffffff;
}

.page-advantages .section-head p:not(.eyebrow) {
  margin-top: 14px;
  color: rgba(225, 237, 245, 0.7);
  font-size: clamp(1.05rem, 1.7vw, 1.32rem);
}

.advantage-grid,
.scene-grid {
  position: relative;
  z-index: 1;
  width: min(1120px, 100%);
  display: grid;
  gap: 18px;
  margin: 0 auto;
}

.advantage-grid {
  width: min(1180px, 100%);
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.advantage-card {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 44px 34px 36px;
  border: 1px solid rgba(114, 236, 255, 0.16);
  border-radius: 38px;
  color: inherit;
  background:
    radial-gradient(circle at 22% 18%, rgba(73, 199, 255, 0.2), transparent 28%),
    linear-gradient(145deg, rgba(2, 11, 22, 0.98), rgba(0, 24, 42, 0.95));
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: background-color 220ms ease, border-color 220ms ease, transform 220ms ease, box-shadow 220ms ease;
}

.advantage-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(73, 199, 255, 0.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(73, 199, 255, 0.1) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.72), transparent 72%);
  opacity: 0.38;
  pointer-events: none;
}

.advantage-card::after {
  content: "";
  position: absolute;
  right: -44px;
  bottom: -54px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(73, 199, 255, 0.36), transparent 68%);
  opacity: 0.68;
  pointer-events: none;
}

.advantage-card:hover,
.advantage-card:focus-visible {
  border-color: rgba(73, 199, 255, 0.52);
  background:
    radial-gradient(circle at 22% 18%, rgba(73, 199, 255, 0.26), transparent 30%),
    linear-gradient(145deg, rgba(3, 16, 30, 0.98), rgba(2, 40, 64, 0.95));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.36), 0 0 42px rgba(73, 199, 255, 0.2);
  transform: translateY(-8px);
}

.advantage-icon {
  position: relative;
  z-index: 1;
  width: 68px;
  height: 68px;
  display: grid;
  place-items: center;
  margin-bottom: 46px;
  border: 1px solid rgba(139, 232, 255, 0.42);
  border-radius: 18px;
  color: #d8fbff;
  background:
    radial-gradient(circle at 50% 48%, rgba(73, 199, 255, 0.26), transparent 58%),
    rgba(1, 16, 28, 0.78);
  box-shadow:
    0 0 28px rgba(73, 199, 255, 0.22),
    inset 0 0 22px rgba(73, 199, 255, 0.16);
}

.advantage-icon::before {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 24px;
  background: radial-gradient(circle, rgba(73, 199, 255, 0.22), transparent 66%);
  filter: blur(4px);
}

.advantage-icon svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  padding: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 8px rgba(73, 199, 255, 0.72));
}

.advantage-card h3 {
  position: relative;
  z-index: 1;
  margin: 0;
  color: #ffffff;
  font-size: clamp(1.35rem, 2vw, 1.72rem);
  line-height: 1.28;
}

.advantage-card p {
  position: relative;
  z-index: 1;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1rem;
  line-height: 1.75;
}

.page-scenes {
  position: relative;
  overflow: hidden;
  background: #d8e8f8;
}

.scene-head {
  margin-bottom: 28px;
  text-align: left;
}

.section-bg-visual {
  z-index: 0;
}

.section-bg-video {
  opacity: 0.68;
  object-position: center;
  background: #d8e8f8;
  transition: opacity 600ms ease;
  transform: translateZ(0);
}

.section-bg-video:not(.is-video-ready) {
  opacity: 0.52;
}

.section-video-shade,
.page-bg-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(241, 247, 255, 0.58), rgba(241, 247, 255, 0.4)),
    radial-gradient(circle at 50% 10%, rgba(73, 199, 255, 0.14), transparent 38%);
}

.scene-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scene-card {
  position: relative;
  min-height: 270px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  border: 0;
  border-radius: var(--radius);
  color: #fff;
  background: #13294a;
  box-shadow: 0 18px 50px rgba(7, 28, 68, 0.2);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.scene-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--scene-image) center / cover;
  transition: transform 300ms ease;
}

.scene-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 28, 68, 0.06), rgba(7, 28, 68, 0.78));
}

.scene-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 70px rgba(7, 28, 68, 0.26);
}

.scene-card:hover::before {
  transform: scale(1.05);
}

.scene-card span,
.scene-card h3,
.scene-card p {
  position: relative;
  z-index: 1;
}

.scene-card span {
  color: #9be6ff;
  font-weight: 900;
}

.scene-card h3 {
  margin: 10px 0 8px;
  font-size: 1.38rem;
}

.scene-card p {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.7;
}

.page-contact {
  min-height: 100vh;
  display: grid;
  align-content: center;
  padding-top: calc(var(--header) + 54px);
  padding-bottom: 56px;
  background:
    radial-gradient(circle at 12% 18%, rgba(74, 91, 255, 0.15), transparent 30%),
    linear-gradient(135deg, #061e30 0%, #082d3d 54%, #062636 100%);
}

.contact-heading {
  position: relative;
  z-index: 1;
  width: min(1240px, 100%);
  margin: 0 auto 44px;
}

.contact-heading h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(2.25rem, 4vw, 4.5rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.contact-shell {
  width: min(1240px, 100%);
  display: grid;
  grid-template-columns: minmax(260px, 1.2fr) minmax(210px, 0.9fr) minmax(230px, 1fr) minmax(210px, 0.85fr);
  gap: clamp(30px, 4vw, 64px);
  align-items: start;
  margin: 0 auto;
}

.contact-brand,
.contact-info,
.contact-links,
.wechat-card {
  min-width: 0;
}

.contact-logo {
  width: 116px;
  height: 116px;
  object-fit: contain;
  object-position: left center;
  filter: brightness(1.15) drop-shadow(0 10px 24px rgba(0, 0, 0, 0.2));
}

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

@keyframes hero-text-reveal {
  from {
    opacity: 0;
    filter: blur(10px);
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

@keyframes corner-reveal {
  from {
    opacity: 0;
    filter: blur(7px);
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0);
  }
}

.contact-brand p {
  margin: 28px 0 14px;
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 800;
}

.contact-brand .contact-vision {
  max-width: 390px;
  margin: 0;
  color: rgba(231, 241, 248, 0.75);
  font-size: 0.92rem;
  font-weight: 400;
  line-height: 1.9;
}

.contact-info {
  display: grid;
  gap: 24px;
  color: #ffffff;
  font-style: normal;
  font-weight: 700;
  line-height: 1.55;
}

.contact-detail {
  display: grid;
  gap: 7px;
}

.contact-detail span {
  color: rgba(207, 224, 234, 0.58);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-detail strong,
.contact-detail a {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.98rem;
  line-height: 1.55;
  word-break: break-word;
}

.contact-info a:hover {
  color: #8b7bff;
}

.contact-shell h2 {
  position: relative;
  margin: 0 0 32px;
  padding-bottom: 18px;
  color: #ffffff;
  font-size: 1.08rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.contact-shell h2::before,
.contact-shell h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
}

.contact-shell h2::before {
  right: 0;
  background: rgba(255, 255, 255, 0.16);
}

.contact-shell h2::after {
  width: 74px;
  background: linear-gradient(90deg, #7048ff, #9278ff);
  box-shadow: 0 0 16px rgba(112, 72, 255, 0.35);
}

.contact-links {
  display: grid;
  gap: 16px;
  color: rgba(255, 255, 255, 0.78);
}

.contact-links span {
  position: relative;
  padding-left: 0;
  line-height: 1.6;
}

.wechat-card {
  display: grid;
  justify-items: start;
  align-content: start;
  text-align: left;
}

.wechat-qr {
  width: min(100%, 190px);
  height: auto;
  display: block;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.24);
}

.wechat-card p {
  margin: 14px 0 0;
  color: rgba(231, 241, 248, 0.68);
  line-height: 1.55;
}

.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 58px;
  padding: 18px clamp(18px, 5vw, 72px);
  color: rgba(231, 241, 248, 0.72);
  background: #061e30;
  font-size: 0.86rem;
  line-height: 1.5;
  text-align: center;
}

.icp-link {
  transition: color 180ms ease;
}

.icp-link:hover {
  color: #ffffff;
}

.tutorial-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(7, 28, 68, 0.54);
  backdrop-filter: blur(14px);
}

.tutorial-modal[hidden] {
  display: none;
}

body.modal-open {
  overflow: hidden;
}

.tutorial-dialog {
  position: relative;
  width: min(880px, 100%);
  max-height: calc(100vh - 44px);
  overflow: auto;
  padding: clamp(22px, 4vw, 34px);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 38px 110px rgba(7, 28, 68, 0.28);
}

.tutorial-layout {
  display: grid;
  grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  color: var(--ink);
  background: rgba(7, 28, 68, 0.08);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
}

.tutorial-video-shell {
  overflow: hidden;
  width: min(100%, 300px);
  aspect-ratio: 9 / 16;
  justify-self: center;
  border-radius: var(--radius);
  background: #071523;
}

.tutorial-video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #071523;
}

.tutorial-copy .eyebrow {
  margin-bottom: 10px;
}

.tutorial-dialog h2 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
}

.tutorial-dialog p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.subpage {
  min-height: 100vh;
}

.subpage-main {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  padding: calc(var(--header) + 68px) clamp(18px, 5vw, 72px) 72px;
}

.page-bg-visual {
  z-index: 0;
}

.sub-hero,
.video-list-section,
.video-detail,
.feature-hero,
.feature-detail,
.manual-shell {
  position: relative;
  z-index: 1;
}

.sub-hero,
.feature-hero {
  width: min(1080px, 100%);
  margin: 0 auto 30px;
}

.feature-page {
  background:
    radial-gradient(circle at 18% 12%, rgba(73, 199, 255, 0.14), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #eef6ff 100%);
}

.feature-bg-visual {
  opacity: 0.74;
  object-position: center;
}

.feature-bg-shade {
  background:
    linear-gradient(180deg, rgba(247, 251, 255, 0.9), rgba(238, 246, 255, 0.72)),
    radial-gradient(circle at 76% 12%, rgba(23, 104, 242, 0.12), transparent 32%);
}

.feature-hero {
  margin-bottom: 44px;
}

.feature-hero h1 {
  max-width: 980px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(2.8rem, 7vw, 6.8rem);
  line-height: 0.96;
  font-weight: 950;
}

.feature-hero p:not(.eyebrow) {
  max-width: 920px;
  margin: 24px 0 0;
  color: var(--text);
  font-size: clamp(1.08rem, 1.9vw, 1.42rem);
  line-height: 1.85;
}

.feature-detail {
  width: min(1120px, 100%);
  display: grid;
  gap: 22px;
  margin: 0 auto;
}

.feature-module {
  display: grid;
  grid-template-columns: minmax(260px, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(24px, 4vw, 54px);
  align-items: center;
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid rgba(23, 104, 242, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 24px 70px rgba(24, 72, 139, 0.13);
  backdrop-filter: blur(18px);
}

.feature-module:nth-child(even) .feature-module-media {
  order: 2;
}

.feature-module-media {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  background: #061e30;
  box-shadow: 0 22px 54px rgba(7, 28, 68, 0.18);
}

.feature-module-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-module-copy {
  min-width: 0;
}

.feature-module-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.8rem, 4vw, 3.3rem);
  line-height: 1.08;
  font-weight: 950;
}

.feature-module-copy span {
  display: inline-block;
  margin-top: 20px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature-module-copy p {
  margin: 10px 0 0;
  color: var(--text);
  font-size: 1.02rem;
  line-height: 1.85;
  white-space: pre-line;
}

.manual-page {
  overflow: visible;
  background:
    radial-gradient(circle at 18% 12%, rgba(73, 199, 255, 0.12), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #edf6ff 100%);
}

.manual-hero h1 {
  font-size: clamp(2.8rem, 6vw, 5.8rem);
}

.manual-shell {
  width: min(1180px, 100%);
  display: grid;
  gap: clamp(18px, 3vw, 30px);
  margin: 0 auto;
}

.manual-selector {
  display: grid;
  gap: 12px;
}

.manual-selector h2,
.manual-outline h2 {
  margin: 0 0 4px;
  color: var(--ink);
  font-size: 1.08rem;
  font-weight: 950;
}

.manual-picker-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.manual-picker-card {
  display: grid;
  gap: 8px;
  width: 100%;
  padding: 16px;
  border: 1px solid rgba(23, 104, 242, 0.12);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 44px rgba(24, 72, 139, 0.09);
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.manual-picker-card:hover,
.manual-picker-card:focus-visible,
.manual-picker-card.is-active {
  border-color: rgba(23, 104, 242, 0.44);
  background: rgba(255, 255, 255, 0.94);
  transform: translateY(-1px);
}

.manual-picker-card span {
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 950;
}

.manual-picker-card strong {
  color: var(--ink);
  font-size: 1.04rem;
  line-height: 1.35;
}

.manual-picker-card small {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.manual-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.32fr) minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  align-items: start;
}

.manual-outline {
  position: sticky;
  top: calc(var(--header) + 24px);
  display: grid;
  gap: 8px;
  max-height: calc(100vh - var(--header) - 48px);
  overflow: auto;
  padding: 16px 12px 16px 0;
  border-right: 1px solid rgba(20, 55, 105, 0.12);
}

.manual-outline-list {
  display: grid;
  gap: 2px;
}

.manual-outline-link {
  display: block;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  color: #53647e;
  font-size: 0.94rem;
  line-height: 1.45;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.manual-outline-link:hover,
.manual-outline-link:focus-visible {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(23, 104, 242, 0.07);
}

.manual-outline-link.level-3 {
  padding-left: 26px;
  font-size: 0.9rem;
}

.manual-reader {
  min-width: 0;
  padding: clamp(20px, 3vw, 36px);
  border: 1px solid rgba(23, 104, 242, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 24px 70px rgba(24, 72, 139, 0.13);
  backdrop-filter: blur(18px);
}

.manual-reader-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(20, 55, 105, 0.12);
}

.manual-reader-head span,
.manual-download {
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 950;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.manual-download {
  padding: 9px 12px;
  border: 1px solid rgba(23, 104, 242, 0.22);
  border-radius: 999px;
  background: rgba(23, 104, 242, 0.06);
}

.manual-content {
  min-width: 0;
  color: var(--text);
}

.manual-content h1,
.manual-content h2,
.manual-content h3 {
  scroll-margin-top: calc(var(--header) + 24px);
  color: var(--ink);
  line-height: 1.18;
}

.manual-content h1 {
  margin: 0 0 22px;
  font-size: clamp(2rem, 4vw, 3.6rem);
  font-weight: 950;
}

.manual-content h2 {
  margin: 42px 0 18px;
  padding-top: 24px;
  border-top: 1px solid rgba(20, 55, 105, 0.12);
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  font-weight: 950;
}

.manual-content h3 {
  margin: 24px 0 10px;
  font-size: clamp(1.08rem, 2vw, 1.34rem);
  font-weight: 900;
}

.manual-content p,
.manual-content li {
  font-size: 1rem;
  line-height: 1.9;
}

.manual-content p {
  margin: 10px 0;
}

.manual-content ul {
  display: grid;
  gap: 7px;
  margin: 10px 0 18px;
  padding-left: 1.2em;
}

.manual-content hr {
  margin: 32px 0;
  border: 0;
  border-top: 1px solid rgba(20, 55, 105, 0.12);
}

.back-link {
  display: inline-flex;
  margin-bottom: 26px;
  color: var(--ink);
  font-weight: 900;
}

.video-library {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.video-library.standalone,
.scene-empty.standalone,
.video-detail {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.video-tile {
  display: grid;
  grid-template-columns: minmax(150px, 0.48fr) minmax(0, 1fr);
  gap: 18px;
  min-height: 230px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 16px 44px rgba(24, 72, 139, 0.12);
  transition: transform 180ms ease, border-color 180ms ease;
}

.video-tile:hover {
  transform: translateY(-3px);
  border-color: rgba(23, 104, 242, 0.42);
}

.video-tile-thumb {
  overflow: hidden;
  border: 6px solid #101b2d;
  border-radius: var(--radius);
  background: #071523;
}

.video-tile-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-tile-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
}

.video-tile-copy > span {
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 900;
}

.video-tile-copy strong {
  margin-top: 8px;
  color: var(--ink);
  font-size: clamp(1.25rem, 2vw, 1.8rem);
  line-height: 1.18;
}

.video-tile-copy small {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

.scene-empty {
  min-height: 260px;
  display: grid;
  place-content: center;
  gap: 10px;
  padding: 32px;
  border: 1px dashed rgba(23, 104, 242, 0.35);
  border-radius: var(--radius);
  text-align: center;
  background: rgba(255, 255, 255, 0.8);
}

.scene-empty[hidden] {
  display: none;
}

.scene-empty h2 {
  margin: 0;
  color: var(--ink);
}

.scene-empty p {
  margin: 0;
  color: var(--muted);
}

.video-detail {
  display: grid;
  grid-template-columns: minmax(260px, 380px) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 68px);
  align-items: center;
}

.scene-video-wrap {
  overflow: hidden;
  width: min(100%, 390px);
  aspect-ratio: 9 / 16;
  justify-self: center;
  border: 9px solid #101b2d;
  border-radius: 30px;
  background: #071523;
  box-shadow: 0 30px 80px rgba(8, 28, 60, 0.28);
}

.scene-video-wrap .poster-play,
.scene-video-wrap img,
.scene-video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 1040px) {
  .site-header {
    grid-template-columns: minmax(128px, 0.8fr) auto minmax(64px, 0.8fr);
    padding-inline: 22px;
  }

  .site-nav {
    gap: 18px;
    font-size: 0.9rem;
  }

  .advantage-grid,
  .scene-grid,
  .video-library,
  .contact-shell,
  .video-detail {
    grid-template-columns: 1fr 1fr;
  }

  .contact-shell,
  .video-detail {
    grid-template-columns: 1fr;
  }

  .contact-shell {
    grid-template-columns: 1fr 1fr;
    gap: 48px 40px;
  }
}

@media (max-width: 760px) {
  :root {
    --header: 64px;
  }

  .site-header {
    grid-template-columns: auto 1fr auto;
    gap: 10px;
    padding: 0 16px;
  }

  .brand {
    grid-column: 1;
    grid-row: 1;
  }

  .brand-logo {
    width: 48px;
    height: 48px;
  }

  .menu-toggle {
    grid-column: 3;
    grid-row: 1;
    justify-self: end;
    display: inline-flex;
    position: relative;
    z-index: 60;
  }

  .lang-toggle {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    min-width: 52px;
    height: 34px;
    padding-inline: 12px;
  }

  .site-nav {
    position: fixed;
    inset: var(--header) 0 auto;
    z-index: 55;
    width: 100vw;
    justify-self: stretch;
    display: grid;
    gap: 0;
    padding: 10px 18px 18px;
    color: rgba(255, 255, 255, 0.94);
    background: rgba(4, 17, 29, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    transition: transform 180ms ease;
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .site-nav a,
  .nav-dropdown-toggle {
    width: 100%;
    padding: 14px 0;
    text-align: left;
  }

  .nav-dropdown-menu {
    position: static;
    min-width: 0;
    display: grid;
    gap: 0;
    padding: 0 0 10px 12px;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .nav-dropdown:hover .nav-dropdown-menu {
    display: grid;
  }

  .nav-dropdown.is-open .nav-dropdown-menu {
    display: grid;
    transform: none;
  }

  .nav-dropdown-menu a,
  .nav-dropdown-menu button {
    padding: 9px 10px;
    color: rgba(255, 255, 255, 0.82);
  }

  body.menu-open {
    overflow: hidden;
  }

  .page {
    padding: calc(var(--header) + 44px) 18px 58px;
  }

  .page-home {
    padding: var(--header) 18px 0;
  }

  .home-shade {
    background:
      linear-gradient(180deg, rgba(3, 14, 25, 0.18), rgba(3, 14, 25, 0.06) 42%, rgba(3, 14, 25, 0.52));
  }

  .hero-bg-video {
    object-position: 50% center;
  }

  .hero-title {
    font-size: clamp(1.72rem, 8vw, 2.72rem);
    line-height: 1.36;
  }

  html[lang="en"] .hero-title {
    font-size: clamp(2rem, 10.2vw, 3.5rem);
  }

  .hero-corner-link {
    top: calc(var(--header) + 18px);
  }

  .hero-corner-link small {
    font-size: 0.82rem;
  }

  .hero-corner-link span {
    font-size: 1.02rem;
  }

  .section-bg-video {
    opacity: 0.58;
  }

  .site-reveal-enabled main :is(
      .section-head > *,
      .advantage-card > *,
      .phone-caption > *,
      .scene-card > *,
      .feature-hero > *,
      .feature-module-media,
      .feature-module-copy > *,
      .contact-heading > *,
      .contact-brand > :not(img),
      .contact-info > *,
      .contact-links > *,
      .wechat-card > :not(img),
      .sub-hero > *,
      .video-tile-copy > *,
      .scene-copy > *,
      .scene-empty > *
    ) {
    filter: blur(4px);
    transform: translateY(22px);
  }

  .section-video-shade {
    background: linear-gradient(180deg, rgba(241, 247, 255, 0.64), rgba(241, 247, 255, 0.46));
  }

  .phone-carousel {
    min-height: 560px;
  }

  .phone-stage {
    height: 560px;
  }

  .phone-card {
    width: min(300px, 76vw);
    border-radius: 28px;
  }

  .phone-card.is-prev {
    transform: translate(calc(-50% - 210px), -50%) scale(0.72);
  }

  .phone-card.is-next {
    transform: translate(calc(-50% + 210px), -50%) scale(0.72);
  }

  .carousel-arrow {
    display: none;
  }

  .advantage-grid,
  .scene-grid,
  .video-library,
  .video-tile {
    grid-template-columns: 1fr;
  }

  .advantage-card {
    min-height: 260px;
    padding: 34px 32px 30px;
    border-radius: 32px;
  }

  .advantage-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 30px;
  }

  .scene-card {
    min-height: 230px;
  }

  .contact-shell {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .page-contact {
    align-content: start;
    padding-top: calc(var(--header) + 44px);
    padding-bottom: 48px;
  }

  .contact-heading {
    margin-bottom: 38px;
  }

  .contact-heading h2 {
    font-size: 2.45rem;
  }

  .contact-brand .contact-vision {
    max-width: none;
  }

  .wechat-qr {
    width: 180px;
  }

  .contact-logo {
    width: 96px;
    height: 96px;
  }

  .tutorial-modal {
    padding: 12px;
  }

  .tutorial-dialog {
    max-height: calc(100dvh - 24px);
    padding: 18px;
  }

  .tutorial-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .tutorial-video-shell {
    width: min(100%, 240px);
  }

  .feature-hero {
    margin-bottom: 30px;
  }

  .feature-hero h1 {
    font-size: clamp(2.45rem, 14vw, 4.2rem);
  }

  .feature-module,
  .feature-module:nth-child(even) {
    grid-template-columns: 1fr;
  }

  .feature-module:nth-child(even) .feature-module-media {
    order: 0;
  }

  .feature-module-media {
    aspect-ratio: 4 / 3;
  }

  .feature-module-copy h2 {
    font-size: clamp(1.65rem, 8vw, 2.55rem);
  }

  .manual-layout {
    grid-template-columns: 1fr;
  }

  .manual-outline {
    position: static;
    max-height: none;
    overflow: visible;
    padding: 0 0 18px;
    border-right: 0;
    border-bottom: 1px solid rgba(20, 55, 105, 0.12);
  }

  .manual-picker-list {
    grid-template-columns: 1fr;
  }

  .manual-reader {
    padding: 18px;
  }

  .manual-reader-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .manual-content h1 {
    font-size: clamp(1.85rem, 10vw, 2.65rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .site-header,
  .hero-corner-link {
    animation: none;
  }

  .hero-intro-pending .hero-title span {
    opacity: 1;
    filter: none;
    transform: none;
  }

  .site-reveal-enabled main [data-reveal] {
    opacity: 1;
    filter: none;
    transform: none;
    transition: none;
  }

  .phone-card,
  .scene-card,
  .section-bg-video {
    transition: none;
  }
}