:root {
  --background: #070b12;
  --surface: #101722;
  --surface-light: #182230;
  --text: #f3f6fa;
  --muted: #9aa8b8;
  --accent: #54f0b2;
  --border: rgba(255, 255, 255, 0.1);
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--background);
  color: var(--text);
  font-family:
    Arial,
    "Noto Sans TC",
    sans-serif;
  line-height: 1.7;
}

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

.container {
  width: min(90%, var(--max-width));
  margin: 0 auto;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 18, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.navbar-content {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 11, 18, 0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--accent);
  font-size: 18px;
  font-weight: 800;
}

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

nav {
  display: flex;
  gap: 24px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
}

nav a:hover {
  color: var(--text);
}

.hero {
  position: relative;
  min-height: auto;
  display: block;
  overflow: hidden;
  padding: 90px 0 55px;
  background:
    radial-gradient(
      circle at 75% 38%,
      rgba(84, 240, 178, 0.16),
      transparent 32%
    ),
    radial-gradient(
      circle at 15% 82%,
      rgba(31, 120, 255, 0.08),
      transparent 30%
    ),
    linear-gradient(
      135deg,
      #070b12 0%,
      #09131d 55%,
      #061015 100%
    );
}


.hero::before {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  right: -160px;
  top: -180px;
  border-radius: 50%;
  background: rgba(84, 240, 178, 0.08);
  filter: blur(100px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}



.hero-content {
  display: grid;
  grid-template-columns: minmax(320px, 0.7fr) minmax(0, 1.6fr);
  align-items: center;
  gap: 64px;
}

.hero-left {
  max-width: 620px;
}

.hero-video {
  width: 100%;
  aspect-ratio: 16 /9 ;
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(84, 240, 178, 0.22);
  border-radius: 20px;
  box-shadow:
    0 24px 80px rgba(0, 0, 0, 0.45),
    0 0 60px rgba(84, 240, 178, 0.08);
}

.hero-video video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.eyebrow,
.section-label {
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 3px;
}

h1 {
  max-width: 800px;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.1;
}

.hero-description {
  max-width: 650px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 19px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}
.button:hover {
  transform: translateY(-3px);
}

.primary:hover {
  box-shadow: 0 12px 30px rgba(84, 240, 178, 0.25);
}

.secondary:hover {
  border-color: rgba(84, 240, 178, 0.5);
  background: rgba(84, 240, 178, 0.06);
}

.primary {
  background: var(--accent);
  color: #05110c;
  border-color: var(--accent);
}

.secondary {
  background: transparent;
}

.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--surface);
}

h2 {
  margin-bottom: 36px;
  font-size: clamp(32px, 5vw, 48px);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  position: relative;
  min-height: 180px;
  padding: 28px;
  overflow: hidden;
  background:
    linear-gradient(
      145deg,
      rgba(18, 28, 40, 0.96),
      rgba(10, 17, 27, 0.96)
    );
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  transition:
    transform 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease;
}

.card::before {
  content: "";
  position: absolute;
  width: 110px;
  height: 110px;
  top: -60px;
  right: -55px;
  border-radius: 50%;
  background: rgba(84, 240, 178, 0.1);
  filter: blur(28px);
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(84, 240, 178, 0.35);
  box-shadow:
    0 18px 45px rgba(0, 0, 0, 0.3),
    0 0 35px rgba(84, 240, 178, 0.06);
}

.card h3 {
  margin-bottom: 12px;
}

.card p,
.update-item p,
.contact-box p,
.hint {
  color: var(--muted);
}

.video-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  overflow: hidden;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.video-container iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.hint {
  margin-top: 14px;
  font-size: 14px;
}

.update-list {
  display: grid;
  gap: 18px;
}

.update-item {
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.update-item > div {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 12px;
}

.version {
  color: var(--accent);
  font-weight: 800;
}

.update-item time {
  color: var(--muted);
}

.contact-box {
  text-align: center;
}

.contact-box p {
  margin-bottom: 26px;
}

.line-button {
  background: #06c755;
  color: white;
  border-color: #06c755;
}

footer {
  padding: 28px 0;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--border);
}

@media (max-width: 760px) {
  nav {
    display: none;
  }

  .feature-grid {
  grid-template-columns: 1fr;
}

.card {
  min-height: auto;
}
  .hero-content {
  flex-direction: column;
  align-items: stretch;
  gap: 42px;
}

.hero-left {
  max-width: none;
}

.hero-right {
  width: 100%;
}

@media (max-width: 1000px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card,
  .card:nth-child(4),
  .card:nth-child(5) {
    grid-column: auto;
  }
}