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

body {
  font-family: 'Noto Sans TC', sans-serif;
  background: #000;
  color: #d9d9d9;
  overflow-x: hidden;
  font-size: 18px;
}

/* ⭐ 全站背景 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("assets/bg-base.jpg") no-repeat center center/cover;
  filter: brightness(0.38) contrast(1.15);
  z-index: -3;
}

/* 背景層 */
.bg-overlay {
  background: url("assets/bg-base.jpg") no-repeat center center/cover;
  position: fixed;
  inset: 0;
  filter: brightness(0.38) contrast(1.15);
  z-index: -3;
}

/* 粒子 */
#particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

/* HEADER */
.header {
  width: 100%;
  text-align: center;
  padding: 40px 20px;
}

/* ✅ LOGO（只改透明底） */
.logo {
  display: block;
  width: 160px;
  height: auto;
  margin: 0 auto 12px;
  position: relative;
  z-index: 10; /* 保證浮在背景上 */
  background: transparent; /* LOGO 無底 */
  border: none;
  box-shadow: none;
}

/* 🔥 右側直立導覽列 */
.header nav {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 999;
}

nav a {
  margin: 0;
  text-decoration: none;
  font-family: 'Orbitron', sans-serif;
  font-size: 18px;
  background: linear-gradient(120deg,#ffcb3b,#b1892b,#7a5515);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity .2s;
  white-space: nowrap;
}

nav a:hover { opacity: 0.6; }

/* HERO */
.hero {
  padding: 180px 20px 140px;
}
.hero-text {
  margin: 24px 0;
  font-size: 24px;
}
.btn-main {
  display: inline-block;
  margin-top: 30px;
  padding: 20px 52px;
  border-radius: 40px;
  background: linear-gradient(90deg,#b30000,#ff0000);
  font-weight: bold;
  color: white;
  font-size: 22px;
}

/* METAL TEXT */
.metal {
  font-family: 'Orbitron', sans-serif;
  font-size: 68px;
  background: linear-gradient(120deg,#d4af37,#8c6b1f,#6b4c15);
  -webkit-text-fill-color: transparent;
  -webkit-background-clip: text;
}
.sub-metal {
  font-family: 'Orbitron';
  font-size: 32px;
  color: #bf973a;
}

/* SECTION */
.section { padding: 100px 20px; max-width: 1100px; margin: auto; }
.center { text-align: center; }
.dark { background: rgba(0,0,0,0.38); }

/* CARD */
.card {
  margin: 40px auto;
  padding: 40px;
  max-width: 740px;
  background: rgba(20,20,20,0.55);
  border: 1px solid rgba(120,0,0,0.3);
  border-radius: 14px;
  font-size: 22px;
  line-height: 1.6;
  box-shadow: 0 0 18px rgba(0,0,0,0.4);
}

.accent {
  color: #d4af37;
  font-weight: 600;
  font-size: 26px;
}

/* PRICING STYLE */
.price-group h3 {
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.price-list {
  list-style: none;
  font-size: 22px;
  line-height: 1.8;
}
.price-list li::before {
  content: "• ";
  color: #d4af37;
}
.note, .sub-note {
  font-size: 18px;
  color: #aaa;
  margin-top: 6px;
}
.highlight-text {
  color: #ffcb3b;
  font-weight: bold;
}

/* STATS + REVIEWS */
.stats { list-style: none; font-size: 22px; line-height: 2; }
.review {
  margin: 30px auto;
  max-width: 800px;
  font-size: 22px;
  padding: 32px;
  background: rgba(15,15,15,0.55);
  border-left: 6px solid #d4af37;
}

/* FOOTER */
.footer { padding: 60px 0; color: #777; font-size: 20px; }

/* 金粉動畫 */
.particle {
  position: fixed;
  top: -10px;
  width: 4px; height: 4px;
  background: radial-gradient(circle,#d4af37,#000);
  border-radius: 50%;
  animation: fall linear forwards;
  z-index: -1;
}
@keyframes fall {
  to { transform: translateY(110vh) translateX(12vw); opacity: 0; }
}

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all .9s ease;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* 📱 RWD：手機版自動回歸橫排 */
@media (max-width: 600px) {
  .metal { font-size: 46px; }
  .sub-metal { font-size: 24px; }
  .hero { padding: 130px 20px; }

  .logo { width: 130px; }

  .header nav {
    position: static;
    transform: none;
    flex-direction: row;
    justify-content: center;
    margin-top: 12px;
  }

  nav a {
    margin: 6px 12px;
  }
}