:root {
  color-scheme: dark;
  --bg: #05070b;
  --bg-2: #0b1118;
  --panel: rgba(14, 22, 31, 0.86);
  --panel-strong: rgba(18, 29, 41, 0.96);
  --line: rgba(167, 215, 255, 0.18);
  --text: #f3f7fb;
  --muted: #9faeba;
  --soft: #c7d5df;
  --cyan: #56d7ff;
  --green: #45f0bc;
  --violet: #7b61ff;
  --magenta: #ff5da8;
  --amber: #f3c969;
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    "Inter", "Aptos", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 52px);
  background: rgba(5, 7, 11, 0.74);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-lockup img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand-lockup strong,
.brand-lockup small {
  display: block;
  white-space: nowrap;
}

.brand-lockup strong {
  font-size: 15px;
}

.brand-lockup small {
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
  color: var(--soft);
  font-size: 14px;
}

.nav-cta {
  color: var(--text);
  border: 1px solid rgba(86, 215, 255, 0.44);
  padding: 7px 12px;
  border-radius: 999px;
  box-shadow: 0 0 22px rgba(86, 215, 255, 0.12);
}

.hero {
  position: relative;
  min-height: 94svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: 86px clamp(20px, 5vw, 72px) 28px;
  background: #020409;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 6, 12, 0.96) 0%, rgba(3, 6, 12, 0.65) 38%, rgba(3, 6, 12, 0.1) 72%),
    url("./beacon-01-render-clean.jpg") center right / cover no-repeat;
  transform: scale(1.02);
}

.hero-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 72% 34%, rgba(86, 215, 255, 0.22), transparent 34%),
    radial-gradient(circle at 18% 84%, rgba(69, 240, 188, 0.14), transparent 30%),
    linear-gradient(180deg, transparent 54%, rgba(5, 7, 11, 0.96) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
}

.hero-logo {
  width: min(320px, 58vw);
  margin-bottom: 10px;
  filter: drop-shadow(0 0 28px rgba(255, 255, 255, 0.34));
}

.eyebrow,
.section-kicker,
.panel-label {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(42px, 5.8vw, 66px);
  line-height: 1.06;
  font-weight: 800;
}

.hero-title-slogan {
  max-width: 920px;
  margin-bottom: 22px;
  display: grid;
  gap: 12px;
  text-shadow:
    0 0 18px rgba(86, 215, 255, 0.3),
    0 0 34px rgba(69, 240, 188, 0.18);
}

.hero-title-cn,
.hero-title-en {
  display: block;
}

.hero-title-cn {
  font-size: clamp(46px, 6.4vw, 82px);
  line-height: 1.04;
  letter-spacing: 0.12em;
}

.hero-title-en {
  max-width: 620px;
  color: rgba(199, 213, 223, 0.78);
  font-size: clamp(14px, 1.45vw, 19px);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.12;
  font-weight: 750;
}

h3 {
  font-size: 24px;
  line-height: 1.24;
}

.hero-copy {
  max-width: 670px;
  color: var(--soft);
  font-size: clamp(16px, 2.1vw, 19px);
}

.hero-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.primary-button,
.secondary-button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 11px 20px;
  border: 1px solid transparent;
  cursor: pointer;
}

.primary-button {
  color: #031018;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  font-weight: 800;
  box-shadow: 0 0 30px rgba(86, 215, 255, 0.24);
}

.secondary-button {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(760px, 100%);
  margin: 44px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.hero-facts div {
  padding: 16px;
  background: rgba(5, 10, 16, 0.72);
}

.hero-facts dt {
  color: var(--muted);
  font-size: 12px;
}

.hero-facts dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.section {
  padding: clamp(72px, 10vw, 128px) clamp(20px, 5vw, 72px);
}

.intro-band,
.product-band,
.gear-band,
.detail-band,
.faq-band {
  background:
    linear-gradient(180deg, rgba(5, 7, 11, 1), rgba(10, 16, 23, 0.96)),
    linear-gradient(90deg, transparent, rgba(86, 215, 255, 0.08), transparent);
}

.two-column,
.section-heading,
.detail-layout,
.waitlist-section {
  width: min(var(--max), 100%);
  margin: 0 auto;
}

.two-column {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(28px, 7vw, 86px);
  align-items: start;
}

.copy-stack {
  color: var(--soft);
  font-size: 18px;
}

.copy-stack p:last-child {
  margin-bottom: 0;
}

.line-teaser {
  padding: clamp(44px, 7vw, 76px) clamp(20px, 5vw, 72px);
  background:
    linear-gradient(90deg, rgba(5, 7, 11, 1), rgba(10, 19, 25, 0.98)),
    radial-gradient(circle at 82% 30%, rgba(86, 215, 255, 0.14), transparent 30%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.line-teaser-inner {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.82fr);
  gap: clamp(26px, 6vw, 72px);
  align-items: end;
}

.line-teaser h2 {
  max-width: 760px;
  margin-bottom: 0;
}

.line-teaser-copy p {
  color: var(--soft);
}

.line-teaser-copy a {
  display: inline-flex;
  margin-top: 10px;
  color: var(--green);
  font-weight: 800;
}

.line-preview {
  width: min(var(--max), 100%);
  margin: 34px auto 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(86, 215, 255, 0.22);
  background: rgba(86, 215, 255, 0.22);
}

.line-preview span {
  min-height: 76px;
  display: flex;
  align-items: center;
  padding: 16px 18px;
  color: var(--text);
  background: rgba(7, 13, 18, 0.84);
  font-weight: 800;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: clamp(24px, 6vw, 74px);
  align-items: end;
  margin-bottom: 44px;
}

.section-heading p {
  color: var(--soft);
}

.product-scene-visual {
  width: min(var(--max), 100%);
  min-height: clamp(360px, 58vw, 680px);
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(86, 215, 255, 0.24);
  border-radius: var(--radius);
  background: #070b10;
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.45);
}

.product-scene-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 52%, rgba(0, 0, 0, 0.82)),
    radial-gradient(circle at 24% 24%, rgba(69, 240, 188, 0.18), transparent 32%);
  pointer-events: none;
}

.product-scene-visual img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  object-position: center;
}

.product-scene-visual figcaption {
  position: absolute;
  z-index: 1;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
  padding: 20px 24px;
  color: var(--text);
}

.feature-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.feature-card {
  min-height: 262px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(18, 28, 38, 0.92), rgba(7, 11, 17, 0.96));
}

.feature-number {
  display: block;
  margin-bottom: 42px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.feature-card p,
.detail-copy p,
.spec-panel dd,
.timeline p,
.faq-list p,
.waitlist-copy p,
.site-footer p {
  color: var(--soft);
}

.image-section {
  background: #05070b;
  padding: 0 clamp(20px, 5vw, 72px);
}

.wide-visual {
  width: min(1120px, 100%);
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #090d12;
}

.wide-visual img {
  width: 100%;
  max-height: 680px;
  object-fit: cover;
  object-position: center 42%;
}

.wide-visual figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
  padding: 18px 22px;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.82));
  color: var(--text);
}

.wide-visual span,
.product-scene-visual span,
.scene-grid figcaption {
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 430px);
  gap: clamp(28px, 7vw, 76px);
  align-items: start;
}

.check-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.check-list li {
  padding-left: 26px;
  position: relative;
  color: var(--soft);
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 10px;
  height: 10px;
  border: 2px solid var(--green);
  border-radius: 50%;
  box-shadow: 0 0 14px rgba(69, 240, 188, 0.42);
}

.spec-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.28);
}

.spec-panel h3 {
  margin-bottom: 26px;
}

.spec-panel dl {
  display: grid;
  gap: 18px;
  margin: 0;
}

.spec-panel dt {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.spec-panel dd {
  margin: 3px 0 0;
}

.scene-band,
.roadmap-band {
  background: #070b10;
}

.gear-band {
  background:
    linear-gradient(180deg, rgba(8, 12, 18, 0.98), rgba(5, 7, 11, 1)),
    radial-gradient(circle at 74% 18%, rgba(86, 215, 255, 0.12), transparent 34%);
}

.gear-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.gear-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 19, 27, 0.78);
}

.gear-card.active {
  border-color: rgba(69, 240, 188, 0.52);
  background:
    linear-gradient(180deg, rgba(24, 42, 50, 0.92), rgba(9, 14, 20, 0.94));
  box-shadow: 0 0 34px rgba(69, 240, 188, 0.1);
}

.gear-card span {
  color: var(--green);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.gear-card h3 {
  margin: 34px 0 14px;
}

.gear-card p {
  margin-bottom: 0;
  color: var(--soft);
}

.scene-grid {
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.scene-grid figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #101820;
}

.scene-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.scene-grid figcaption {
  padding: 14px 16px;
}

.timeline {
  width: min(var(--max), 100%);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding: 0;
  margin: 32px auto 0;
  list-style: none;
  border: 1px solid var(--line);
  background: var(--line);
}

.timeline li {
  min-height: 246px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(15, 24, 34, 0.92), rgba(7, 11, 17, 0.96));
}

.timeline span {
  color: var(--amber);
  font-weight: 900;
}

.timeline strong {
  display: block;
  margin: 34px 0 12px;
  font-size: 20px;
}

.faq-list {
  width: min(960px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

summary {
  cursor: pointer;
  padding: 20px 22px;
  font-size: 18px;
  font-weight: 750;
}

details p {
  padding: 0 22px 22px;
  margin-bottom: 0;
}

.waitlist-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
  gap: clamp(28px, 7vw, 74px);
  padding: clamp(72px, 10vw, 128px) clamp(20px, 5vw, 72px);
  align-items: start;
}

.contact-note {
  display: grid;
  gap: 8px;
  margin-top: 28px;
  padding: 18px;
  border: 1px solid rgba(243, 201, 105, 0.32);
  border-radius: var(--radius);
  background: rgba(243, 201, 105, 0.08);
  color: var(--soft);
}

.contact-note strong {
  color: var(--amber);
}

.waitlist-form {
  display: grid;
  gap: 16px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-strong);
}

.waitlist-form label,
.waitlist-form span {
  display: grid;
  gap: 8px;
}

.waitlist-form span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.form-section {
  display: grid;
  gap: 16px;
  margin: 6px 0 0;
  padding: 18px 0 0;
  border: 0;
  border-top: 1px solid rgba(199, 213, 223, 0.14);
}

.form-section legend {
  padding: 0 12px 0 0;
  color: var(--green);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.conditional-field[hidden] {
  display: none;
}

input,
select,
textarea {
  width: 100%;
  color: var(--text);
  background-color: #101922;
  border: 1px solid rgba(199, 213, 223, 0.2);
  border-radius: var(--radius);
  padding: 12px 13px;
  outline: none;
}

select {
  color: #f3f7fb;
  background-color: #111b25;
}

select option {
  color: #f3f7fb;
  background-color: #101922;
}

select option:disabled {
  color: rgba(199, 213, 223, 0.66);
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(86, 215, 255, 0.12);
}

textarea {
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-status {
  min-height: 26px;
  margin: 0;
  color: var(--green);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: #030508;
  color: var(--muted);
}

.site-footer strong,
.site-footer span {
  display: block;
}

.site-footer strong {
  color: var(--text);
}

.site-footer p {
  max-width: 560px;
  margin: 0;
  font-size: 13px;
}

/* Language toggle */
.lang-toggle {
  background: rgba(86, 215, 255, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(86, 215, 255, 0.34);
  padding: 4px 12px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  transition: all 0.2s;
  white-space: nowrap;
}

.lang-toggle:hover {
  background: rgba(86, 215, 255, 0.24);
  box-shadow: 0 0 16px rgba(86, 215, 255, 0.22);
}

@media (max-width: 920px) {
  .site-header {
    position: absolute;
  }

  nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 96px;
  }

  .hero-media {
    background:
      linear-gradient(180deg, rgba(3, 6, 12, 0.6) 0%, rgba(3, 6, 12, 0.96) 70%),
      url("./beacon-01-render-clean.jpg") top center / cover no-repeat;
    opacity: 0.82;
  }

  .hero-content {
    padding-top: 20svh;
  }

  .hero-facts,
  .feature-grid,
  .gear-grid,
  .line-teaser-inner,
  .line-preview,
  .timeline,
  .two-column,
  .section-heading,
  .detail-layout,
  .scene-grid,
  .waitlist-section {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .timeline li {
    min-height: auto;
  }

  .feature-number {
    margin-bottom: 22px;
  }
}

@media (max-width: 620px) {
  .brand-lockup strong {
    font-size: 14px;
  }

  .hero {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-logo {
    width: min(220px, 72vw);
    margin-bottom: 10px;
  }

  h1 {
    font-size: clamp(34px, 9.2vw, 48px);
  }

  .hero-title-slogan {
    gap: 8px;
    margin-bottom: 18px;
  }

  .hero-title-cn {
    font-size: clamp(38px, 12vw, 54px);
    letter-spacing: 0.08em;
  }

  .hero-title-en {
    max-width: 360px;
    font-size: 11px;
    letter-spacing: 0.1em;
  }

  .hero-copy {
    font-size: 15px;
  }

  .hero-facts {
    display: none;
  }


  .lang-toggle {
    padding: 3px 10px;
    font-size: 12px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .wide-visual figcaption {
    position: static;
    background: rgba(8, 13, 19, 0.96);
  }

  .waitlist-form,
  .spec-panel {
    padding: 20px;
  }
}

@media (max-height: 760px) and (min-width: 921px) {
  .hero-facts {
    display: none;
  }
}