:root {
  --paper: #0c141c;
  --paper-2: #101922;
  --card: #121c28;
  --ink: #e8eef4;
  --muted: #8b9aab;
  --dark: #070b10;
  --line: rgba(74, 201, 224, .16);
  --mark: #4ac9e0;
  --glow: #4ac9e0;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--dark);
  font-family: "Source Sans 3", "Segoe UI", sans-serif;
  line-height: 1.5;
}
html[lang="zh"] body { font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Source Sans 3", sans-serif; line-height: 1.7; }
html[lang="ja"] body { font-family: "Noto Sans JP", "Source Sans 3", sans-serif; }
h1, h2, h3, strong { font-family: Archivo, "Source Sans 3", sans-serif; }
html[lang="zh"] h1,
html[lang="zh"] h2,
html[lang="zh"] h3,
html[lang="zh"] strong { font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
img, video { display: block; width: 100%; height: 100%; object-fit: cover; }

.wrap { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  width: fit-content;
  max-width: 100%;
  gap: 8px;
  margin: 0 0 16px;
  padding: 7px 14px;
  color: #9af0fb;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  background: rgba(7,11,16,.58);
  border: 1px solid rgba(74,201,224,.42);
  border-radius: 999px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(0,0,0,.28), 0 0 0 0 rgba(74,201,224,.0);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  cursor: default;
  animation: capsule-glow 3.6s ease-in-out infinite;
  transition: border-color .25s ease, background .25s ease, box-shadow .25s ease, transform .25s ease, color .25s ease;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--glow);
  box-shadow: 0 0 10px var(--glow);
  flex: 0 0 auto;
  position: relative;
  z-index: 1;
  animation: capsule-dot 1.8s ease-in-out infinite;
}
.eyebrow::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 42%;
  background: linear-gradient(105deg, transparent 0%, rgba(154,240,251,.22) 45%, transparent 100%);
  transform: translateX(-160%);
  animation: capsule-sheen 4.2s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}
.eyebrow:hover {
  color: #c8f8ff;
  background: rgba(7,11,16,.78);
  border-color: rgba(74,201,224,.85);
  box-shadow: 0 10px 28px rgba(0,0,0,.35), 0 0 22px rgba(74,201,224,.28);
  transform: translateY(-1px);
}
@keyframes capsule-glow {
  0%, 100% { box-shadow: 0 8px 24px rgba(0,0,0,.28), 0 0 0 0 rgba(74,201,224,0); border-color: rgba(74,201,224,.42); }
  50% { box-shadow: 0 8px 24px rgba(0,0,0,.28), 0 0 18px rgba(74,201,224,.28); border-color: rgba(74,201,224,.72); }
}
@keyframes capsule-dot {
  0%, 100% { transform: scale(1); opacity: .75; box-shadow: 0 0 8px var(--glow); }
  50% { transform: scale(1.35); opacity: 1; box-shadow: 0 0 14px var(--glow); }
}
@keyframes capsule-sheen {
  0%, 58% { transform: translateX(-160%); }
  78%, 100% { transform: translateX(280%); }
}
.lead { color: var(--muted); font-size: 18px; max-width: 62ch; line-height: 1.65; }

.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  color: #fff;
  transition: background .25s ease, color .25s ease, box-shadow .25s ease;
}
.top.scrolled {
  color: #fff;
  background: rgba(7,11,16,.88);
  backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-family: Archivo, sans-serif; letter-spacing: -.02em; }
.brand img { width: 32px; height: 32px; border-radius: 6px; object-fit: cover; background: #000; }
.menu { display: flex; align-items: center; gap: 26px; }
.menu a { font-size: 14px; font-weight: 600; opacity: .88; }
.menu a:hover { color: var(--glow); opacity: 1; }
.top-cta {
  border: 1px solid var(--glow);
  color: var(--glow);
  padding: 9px 14px;
  border-radius: 8px;
  opacity: 1;
}
.burger { display: none; width: 42px; height: 42px; border: 0; background: transparent; }
.burger span { display: block; height: 1.5px; background: currentColor; margin: 7px 0; }

.lang-switch { position: relative; }
.lang-switch-btn {
  display: inline-flex; align-items: center; gap: 7px;
  min-height: 36px; padding: 0 10px;
  border: 1px solid currentColor; background: transparent; color: inherit;
  font-size: 12px; font-weight: 800; letter-spacing: .08em; cursor: pointer;
}
.lang-switch-caret {
  width: 0; height: 0;
  border-left: 4px solid transparent; border-right: 4px solid transparent; border-top: 5px solid currentColor;
}
.lang-switch.is-open .lang-switch-caret { transform: rotate(180deg); }
.lang-switch-menu {
  position: absolute; top: calc(100% + 8px); right: 0;
  min-width: 168px; margin: 0; padding: 6px; list-style: none;
  background: var(--card); color: var(--ink); border: 1px solid var(--line); z-index: 50;
  box-shadow: 0 16px 40px rgba(0,0,0,.45);
}
.lang-switch-menu button {
  width: 100%; display: block; padding: 9px 10px; border: 0; background: transparent;
  text-align: left; font-size: 14px; font-weight: 600; cursor: pointer;
}
.lang-switch-menu button:hover,
.lang-switch-menu button.is-active { background: rgba(74,201,224,.1); color: var(--glow); }

.hero {
  position: relative;
  min-height: 100vh;
  color: #fff;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}
.hero-poster,
.hero-media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-poster { z-index: 1; }
.hero-media {
  z-index: 2;
  opacity: 0;
  transition: opacity .4s ease;
}
.hero-media.is-on { opacity: 1; }
.hero-shade {
  position: absolute; inset: 0; z-index: 2;
  background:
    linear-gradient(90deg, rgba(7,11,16,.72) 0%, rgba(7,11,16,.32) 38%, rgba(7,11,16,.08) 72%),
    linear-gradient(180deg, rgba(7,11,16,.38) 0%, rgba(7,11,16,.1) 36%, rgba(7,11,16,.9) 100%),
    repeating-linear-gradient(0deg, transparent, transparent 47px, rgba(74,201,224,.05) 48px);
}
.hero-copy {
  position: relative; z-index: 3;
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  padding: 0 0 88px;
}
.hero .eyebrow { margin: 0 0 18px; }
h1 {
  margin: 0 0 18px;
  max-width: 12ch;
  font-size: clamp(48px, 8vw, 92px);
  line-height: .92;
  letter-spacing: -.045em;
  font-weight: 800;
}
.lede {
  margin: 0 0 28px;
  max-width: 46ch;
  color: rgba(255,255,255,.84);
  font-size: clamp(16px, 1.6vw, 20px);
}
html[lang="zh"] .eyebrow {
  text-transform: none;
  font-size: 14px;
  letter-spacing: .06em;
  font-weight: 600;
}
html[lang="zh"] .hero h1 {
  max-width: 11.5em;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.32;
  letter-spacing: .06em;
  font-weight: 700;
  white-space: pre-line;
}
html[lang="zh"] .lede {
  max-width: 34em;
  line-height: 1.9;
  letter-spacing: .04em;
  font-size: clamp(15px, 1.45vw, 18px);
  font-weight: 400;
}
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 20px;
  font-size: 14px; font-weight: 700;
  border-radius: 8px;
  transition: filter .2s ease, background .2s ease, color .2s ease;
}
.btn-light { background: var(--glow); color: #061018; }
.btn-light:hover { filter: brightness(1.08); }
.btn-line { border: 1px solid rgba(74,201,224,.7); color: var(--glow); }
.btn-line:hover { background: rgba(74,201,224,.1); }

.paper, .trust {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(74,201,224,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,201,224,.04) 1px, transparent 1px);
  background-size: 56px 56px;
}
.trust {
  padding: 80px max(24px, calc((100vw - var(--max)) / 2));
}
.trust > p {
  margin: 0 0 36px;
  max-width: 24ch;
  font-family: Archivo, sans-serif;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.12;
  letter-spacing: -.03em;
  font-weight: 700;
}
.trust ul {
  list-style: none; margin: 0; padding: 0;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.trust li {
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.trust b { display: block; font-family: Archivo, sans-serif; font-size: 28px; margin-bottom: 8px; color: var(--glow); }
.trust span { color: var(--muted); font-size: 14px; line-height: 1.5; }

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.value-grid article,
.scene-grid article,
.svc-grid article,
.goals a,
.reach a,
.reach-card,
.qr-grid article,
.about-side div {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(74,201,224,.08);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.value-grid article:hover,
.scene-grid article:hover,
.svc-grid article:hover,
.goals a:hover,
.reach a:hover,
.qr-grid article:hover,
.about-side div:hover,
.trust li:hover {
  border-color: rgba(74,201,224,.45);
  box-shadow: inset 0 1px 0 rgba(74,201,224,.16), 0 0 24px rgba(74,201,224,.08);
}
.value-grid article { padding: 28px; border-radius: 12px; }
.value-grid h3 { margin: 0 0 12px; font-size: 22px; letter-spacing: -.03em; }
.value-grid p { margin: 0; color: var(--muted); }

.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
}
.scene-grid article {
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.scene-grid h3 { margin: 0 0 12px; font-size: 22px; letter-spacing: -.03em; }
.scene-grid p { margin: 0; color: var(--muted); }

.stage { padding: 28px 0 72px; background: var(--dark); }
.platform {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto 56px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 48px;
  align-items: center;
  background: transparent;
  color: #fff;
}
.platform:last-child { margin-bottom: 0; }
.platform.reverse { grid-template-columns: .92fr 1.08fr; }
.platform.reverse .platform-copy { order: -1; }
.platform-media {
  display: flex;
  min-height: 0;
  padding: 0;
  aspect-ratio: 16 / 10;
  background: #000;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--line);
}
.platform-media video {
  flex: 1;
  min-height: 0;
  object-fit: cover;
}
.platform-copy {
  display: flex; flex-direction: column; justify-content: center;
  padding: 8px 4px;
}
.platform h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 3.6vw, 46px);
  line-height: 1.08;
  letter-spacing: -.03em;
}
.platform p { color: rgba(255,255,255,.78); margin: 0; }
.platform ul { margin: 20px 0 0; padding-left: 18px; color: rgba(255,255,255,.72); }
.platform li { margin: 8px 0; }

.paper { color: var(--ink); padding: 88px 0; }
.paper h2, .ink h2 {
  margin: 0 0 18px;
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.05;
  letter-spacing: -.035em;
}

.use-list { margin-top: 48px; border-top: 1px solid var(--line); }
.use-list article {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.use-list span {
  color: var(--mark);
  font-family: Archivo, sans-serif;
  font-weight: 800;
  font-size: clamp(40px, 4.4vw, 56px);
  letter-spacing: -.04em;
  line-height: 1;
  text-align: center;
}
.use-list h3 { margin: 0 0 6px; font-size: 28px; letter-spacing: -.03em; }
.use-list p { margin: 0; color: var(--muted); }

.ink { background: var(--dark); color: #fff; padding: 88px 0 72px; }
.ink .lead { color: rgba(255,255,255,.7); }

.films {
  width: min(var(--max), calc(100% - 48px));
  margin: 48px auto 0;
  display: flex;
  flex-direction: column;
  gap: 56px;
}
.film {
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  gap: 40px;
  align-items: center;
  min-height: 0;
  margin-top: 0;
}
.film.reverse { grid-template-columns: .88fr 1.12fr; }
.film.reverse .film-copy { order: -1; }
.film > .media {
  display: flex;
  padding: 0;
  aspect-ratio: 16 / 10;
  background: #000;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid var(--line);
  min-height: 0;
}
.media { position: relative; background: #000; min-height: 280px; }
.film > .media video {
  flex: 1;
  min-height: 0;
  object-fit: cover;
}
.play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 0;
  background: transparent;
  color: rgba(255,255,255,.92);
  cursor: pointer;
  z-index: 2;
  filter: drop-shadow(0 0 12px rgba(74,201,224,.35));
  transition: color .3s ease, transform .3s ease, filter .3s ease;
}
.play:hover {
  color: var(--glow);
  transform: translate(-50%, -50%) scale(1.08);
}
.play svg {
  width: 48px;
  height: 48px;
  margin: 0;
  fill: currentColor;
}
.more-films .play { width: 56px; height: 56px; }
.more-films .play svg { width: 48px; height: 48px; }
.media.is-playing .play { opacity: 0; pointer-events: none; }
.film-copy { display: flex; flex-direction: column; justify-content: center; padding: 8px 4px; }
.film-copy h3 { margin: 0 0 12px; font-size: clamp(24px, 2.4vw, 32px); letter-spacing: -.03em; }
.film-copy p:last-child { margin: 0; color: rgba(255,255,255,.7); }

.more-films {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  column-gap: 16px;
  row-gap: 28px;
  margin-top: 56px;
}
.more-films article { min-width: 0; }
.more-films .media {
  width: 100%;
  min-height: 0;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--line);
}
.more-films .eyebrow { margin: 12px 0 6px; }
.more-films h3 { margin: 0; font-size: 18px; }

.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}
.svc-grid article {
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.svc-grid h3 { margin: 0 0 10px; font-size: 22px; letter-spacing: -.03em; }
.svc-grid p { margin: 0 0 12px; color: var(--muted); font-size: 15px; }
.svc-grid ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 14px; }
.svc-grid li { margin: 6px 0; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.chips span {
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 6px;
  font-size: 12px;
  color: var(--mark);
}

.caps { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.caps span {
  padding: 10px 14px;
  border: 1px solid var(--line);
  font-size: 14px; font-weight: 700;
}

.steps {
  list-style: none; margin: 48px 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
  border-top: 1px solid var(--line); padding-top: 32px;
}
.steps span { display: block; color: var(--mark); font-family: Archivo, sans-serif; font-weight: 800; margin-bottom: 28px; }
.steps strong { display: block; font-size: 22px; margin-bottom: 10px; }
.steps p { margin: 0; color: var(--muted); }

.goals { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 40px; }
.goals a {
  min-height: 260px; padding: 28px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px;
  display: flex; flex-direction: column;
}
.goals a:hover { border-color: rgba(74,201,224,.45); }
.goals span { color: var(--mark); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.goals strong { margin: 40px 0 12px; font-size: 26px; }
.goals p { color: var(--muted); flex: 1; }
.goals em { font-style: normal; font-weight: 700; }
.note { margin: 18px 0 0; color: var(--muted); font-size: 14px; }

.about { padding: 88px 0; }
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; }
.about p { color: var(--muted); }
.about-side { display: grid; gap: 16px; }
.about-side div { padding: 24px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.about-side p { margin: 8px 0 0; }

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.person { margin-top: 28px; }
.person strong, .person span { display: block; }
.person span { color: var(--muted); }
.reach {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 40px;
}
.reach a, .reach-card {
  padding: 22px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  display: flex; flex-direction: column; gap: 8px;
}
.reach a:hover { border-color: rgba(74,201,224,.45); }
.reach span { color: var(--mark); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.reach strong { font-size: 20px; overflow-wrap: anywhere; }
.qr-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.qr-grid article {
  padding: 22px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  text-align: center;
}
.qr-grid h3 { margin: 0 0 14px; font-size: 16px; letter-spacing: -.02em; }
.qr-grid img {
  width: 140px;
  height: 140px;
  margin: 0 auto;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
}
.qr-grid p { margin: 12px 0 0; color: var(--muted); font-size: 13px; }

.foot {
  display: flex; align-items: center; gap: 24px;
  padding: 28px max(24px, calc((100vw - var(--max)) / 2));
  background: var(--dark); color: rgba(255,255,255,.65); font-size: 13px;
}
.foot .brand { color: #fff; }
.foot p, .foot address { margin: 0; flex: 1; font-style: normal; }

.legal { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 140px 0 80px; }
.legal h1 { max-width: none; font-size: clamp(42px, 7vw, 68px); }
.legal h2 { font-size: 22px; margin: 32px 0 10px; }
.legal p { color: var(--muted); }
.legal a { color: var(--mark); }

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 140px;
  z-index: 70;
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(14, 20, 30, .85);
  backdrop-filter: blur(10px);
  color: var(--ink);
  display: grid;
  place-items: center;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, border-color .25s ease, color .25s ease;
}
.back-to-top svg { width: 20px; height: 20px; }
.back-to-top:hover { color: var(--glow); border-color: rgba(74, 201, 224, .45); }
.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top.show:hover { transform: translateY(-2px); }

@media (max-width: 980px) {
  .platform, .platform.reverse, .film, .film.reverse, .about-grid, .contact-grid, .goals, .steps, .trust ul, .reach {
    grid-template-columns: 1fr;
  }
  .platform, .films { width: min(var(--max), calc(100% - 32px)); }
  .platform, .film { gap: 20px; }
  .value-grid, .svc-grid, .more-films, .scene-grid, .qr-grid { grid-template-columns: 1fr 1fr; }
  .platform.reverse .platform-copy, .film.reverse .film-copy { order: 0; }
}

@media (max-width: 640px) {
  .value-grid, .svc-grid, .more-films, .scene-grid, .qr-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .burger { display: block; }
  .menu {
    display: none; position: absolute; inset: 76px 12px auto;
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px; background: var(--card); color: var(--ink); border: 1px solid var(--line);
  }
  .menu.is-open { display: flex; }
  .menu a { padding: 14px 8px; border-bottom: 1px solid var(--line); }
  .hero-copy { padding-bottom: 48px; }
  h1 { max-width: none; }
  html[lang="zh"] .hero h1 { font-size: 32px; line-height: 1.36; max-width: none; }
  .platform-copy, .film-copy { padding: 4px 0 8px; }
  .paper, .ink, .about { padding: 64px 0; }
  .use-list article { grid-template-columns: 72px 1fr; gap: 16px; }
  .use-list span { font-size: 32px; }
  .foot { flex-direction: column; align-items: flex-start; }
  .back-to-top { right: 14px; bottom: 128px; width: 40px; height: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .eyebrow,
  .eyebrow::before,
  .eyebrow::after { animation: none; }
  .eyebrow:hover { transform: none; }
}