/* ====== 基底變數 ====== */
:root {
  --bg-0: #05060d;
  --bg-1: #0a0b1a;
  --bg-2: #0f1028;
  --accent-gold: #FFB547;
  --accent-pink: #FF4D8D;
  --accent-purple: #7B5CFF;
  --accent-cyan: #00E5FF;
  --text: #EEF0FF;
  --text-dim: #9AA0C7;
  --border: rgba(255, 255, 255, 0.08);
  --card-bg: rgba(255, 255, 255, 0.04);
  --glow-pink: 0 0 40px rgba(255, 77, 141, 0.45);
  --glow-gold: 0 0 40px rgba(255, 181, 71, 0.4);
  --glow-purple: 0 0 40px rgba(123, 92, 255, 0.45);
}

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

html, body {
  background: var(--bg-0);
  color: var(--text);
  font-family: 'Space Grotesk', 'Noto Sans TC', -apple-system, sans-serif;
  overflow-x: hidden;
  min-height: 100vh;
  line-height: 1.6;
}

body {
  background:
    radial-gradient(ellipse at top left, rgba(123, 92, 255, 0.15), transparent 50%),
    radial-gradient(ellipse at bottom right, rgba(255, 77, 141, 0.12), transparent 50%),
    radial-gradient(ellipse at center, rgba(255, 181, 71, 0.08), transparent 70%),
    var(--bg-0);
  position: relative;
}

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

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(123, 92, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 92, 255, 0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
}

.glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
  animation: floatGlow 14s ease-in-out infinite;
}
.glow-1 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, #7B5CFF, transparent 60%);
  top: -120px; left: -120px;
}
.glow-2 {
  width: 480px; height: 480px;
  background: radial-gradient(circle, #FF4D8D, transparent 60%);
  bottom: -100px; right: -100px;
  animation-delay: -5s;
}
.glow-3 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, #FFB547, transparent 60%);
  top: 40%; left: 45%;
  animation-delay: -9s;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.1); }
}

/* ====== 導覽列 ====== */
.navbar {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 40px);
  max-width: 1400px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: rgba(10, 11, 26, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  z-index: 100;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 0 12px rgba(255, 77, 141, 0.5));
}
.logo-text {
  font-family: 'Orbitron', sans-serif;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #FFB547, #FF4D8D, #7B5CFF);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.25s;
  position: relative;
}
.nav-links a:hover { color: var(--text); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-pink));
  transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }

.btn-login {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
}
.btn-login:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 181, 71, 0.5);
  box-shadow: 0 0 24px rgba(255, 181, 71, 0.2);
  transform: translateY(-1px);
}

/* ====== Hero 主視覺 ====== */
.hero {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 140px 40px 80px;
  min-height: 100vh;
}

.hero-content { animation: fadeInUp 0.9s ease-out; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(123, 92, 255, 0.1);
  border: 1px solid rgba(123, 92, 255, 0.3);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 28px;
  font-weight: 500;
}
.badge .dot {
  width: 8px; height: 8px;
  background: var(--accent-gold);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-gold);
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.6; }
}

.hero-title {
  font-family: 'Orbitron', 'Noto Sans TC', sans-serif;
  font-weight: 900;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1;
  letter-spacing: -2px;
  margin-bottom: 24px;
}
.gradient-text {
  display: block;
  background: linear-gradient(135deg, #FFB547 0%, #FF4D8D 50%, #7B5CFF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 30px rgba(255, 77, 141, 0.4));
}
.hero-sub-line {
  display: block;
  color: var(--text);
  font-size: 0.75em;
  margin-top: 8px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-dim);
  margin-bottom: 36px;
  max-width: 520px;
  line-height: 1.7;
}
.hero-desc strong {
  color: var(--text);
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.cta-row {
  display: flex;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-pink), var(--accent-purple));
  background-size: 200% 200%;
  border: none;
  border-radius: 14px;
  color: white;
  font-size: 16px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 8px 24px rgba(255, 77, 141, 0.35);
  animation: gradientShift 4s ease infinite;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(255, 77, 141, 0.55);
}
.btn-primary svg { transition: transform 0.3s; }
.btn-primary:hover svg { transform: translateX(4px); }

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-ghost {
  padding: 16px 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text);
  font-size: 16px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.stats {
  display: flex;
  align-items: center;
  gap: 32px;
}
.stat-num {
  font-family: 'Orbitron', sans-serif;
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 4px;
}
.divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* ====== Hero 右側科幻視覺 ====== */
.hero-visual {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 1.2s ease-out;
}

/* 軌道環 */
.orbit {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.orbit-1 {
  width: 380px; height: 380px;
  border-color: rgba(255, 181, 71, 0.2);
  animation: rotate 30s linear infinite;
}
.orbit-2 {
  width: 500px; height: 500px;
  border-color: rgba(255, 77, 141, 0.15);
  border-style: dashed;
  animation: rotate 45s linear infinite reverse;
}
.orbit-3 {
  width: 620px; height: 620px;
  border-color: rgba(123, 92, 255, 0.1);
  animation: rotate 60s linear infinite;
}

@keyframes rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 環繞飄浮卡片 */
.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 12px 16px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0) 55%),
    rgba(13, 14, 34, 0.72);
  backdrop-filter: blur(18px) saturate(1.2);
  -webkit-backdrop-filter: blur(18px) saturate(1.2);
  border: 1px solid var(--border);
  border-radius: 15px;
  /* 三層陰影：貼近的暗邊、擴散的落影、內側一道高光 */
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.35),
    0 14px 40px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.09);
  animation: floatCard 6s ease-in-out infinite;
  transition: box-shadow 0.35s ease, border-color 0.35s ease;
  z-index: 3;
}
.float-card:hover {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.35),
    0 20px 52px rgba(0, 0, 0, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.14);
}
.fc-icon { font-size: 26px; }
.fc-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}
.fc-tag {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

.fc-1 {
  top: 8%; left: 2%;
  border-color: rgba(255, 77, 141, 0.4);
  animation-delay: -0s;
}
.fc-2 {
  top: 20%; right: 0%;
  border-color: rgba(255, 181, 71, 0.4);
  animation-delay: -1.5s;
}
.fc-3 {
  bottom: 22%; left: -2%;
  border-color: rgba(123, 92, 255, 0.4);
  animation-delay: -3s;
}
.fc-4 {
  bottom: 10%; right: 4%;
  border-color: rgba(0, 229, 255, 0.4);
  animation-delay: -4.5s;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* 中央全息酒杯 */
.holo-glass {
  position: relative;
  width: 300px;
  height: 460px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}
/* 光環對齊杯體（杯口到杯腳），而非整張 SVG 的幾何中心 */
.holo-ring {
  position: absolute;
  top: 38%; left: 50%;
  width: 250px; height: 250px;
  border: 1px solid rgba(255, 181, 71, 0.28);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 60px rgba(255, 181, 71, 0.16), inset 0 0 50px rgba(255, 77, 141, 0.1);
  animation: holoRotate 14s linear infinite;
}
.holo-ring.ring-2 {
  width: 322px; height: 322px;
  border-color: rgba(123, 92, 255, 0.2);
  border-style: dashed;
  box-shadow: none;
  animation: holoRotate 22s linear infinite reverse;
}

@keyframes holoRotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.glass-svg {
  width: 268px;
  height: auto;
  overflow: visible;
  filter: drop-shadow(0 18px 46px rgba(255, 77, 141, 0.28));
}

/* 杯體浮動：整體時長拉長、幅度收斂，看起來才像懸浮而不是彈跳 */
.hg-body {
  animation: glassFloat 7s ease-in-out infinite;
  transform-origin: 120px 200px;
  transform-box: fill-box;
}
@keyframes glassFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-11px) rotate(0.4deg); }
}

/* 倒影跟著杯體反向移動，維持鏡像關係 */
.hg-reflection {
  animation: reflectFloat 7s ease-in-out infinite;
}
@keyframes reflectFloat {
  0%, 100% { transform: translate(0, 427px) scale(1, -0.454); }
  50% { transform: translate(0, 432px) scale(1, -0.454); }
}

/* 焦散光池的亮度隨浮動起伏，模擬透光量變化 */
.hg-caustic {
  animation: causticPulse 7s ease-in-out infinite;
  mix-blend-mode: screen;
}
@keyframes causticPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.72; }
}

/* 影子與杯體反向呼應：杯子升高時影子縮小、變淡 */
.hg-shadow {
  animation: shadowBreath 7s ease-in-out infinite;
  transform-origin: 120px 305px;
  transform-box: view-box;
}
@keyframes shadowBreath {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.88); opacity: 0.68; }
}

.liquid {
  animation: liquidPulse 5s ease-in-out infinite;
}
@keyframes liquidPulse {
  0%, 100% { opacity: 0.92; }
  50% { opacity: 1; }
}

/* 液面：極輕微的呼吸，過大會變成果凍感 */
.surface {
  animation: surfaceWave 4s ease-in-out infinite;
  transform-origin: 120px 96px;
  transform-box: view-box;
}
@keyframes surfaceWave {
  0%, 100% { transform: scaleX(1) scaleY(1); }
  50% { transform: scaleX(1.015) scaleY(0.94); }
}

/* 杯身高光緩慢流動 */
.hg-specular {
  animation: specularSweep 6s ease-in-out infinite;
}
@keyframes specularSweep {
  0%, 100% { opacity: 0.22; }
  50% { opacity: 0.5; }
}

.bubble {
  animation: bubbleRise 4.5s ease-in infinite;
}
.bubble.b1 { animation-delay: 0s; }
.bubble.b2 { animation-delay: -1.1s; }
.bubble.b3 { animation-delay: -2.2s; }
.bubble.b4 { animation-delay: -3.1s; }
.bubble.b5 { animation-delay: -3.8s; }

/* 氣泡上升時略微橫移並放大，接近真實液體中的軌跡 */
@keyframes bubbleRise {
  0%   { transform: translate(0, 0) scale(0.6); opacity: 0; }
  20%  { opacity: 0.75; }
  70%  { opacity: 0.6; }
  100% { transform: translate(3px, -58px) scale(1.15); opacity: 0; }
}

/* 資料標籤線 */
.data-label {
  position: absolute;
  z-index: 4;
  animation: dataFade 0.8s ease-out forwards;
  opacity: 0;
}
.dl-top { top: -6%; right: 5%; animation-delay: 0.8s; }
.dl-right { top: 48%; right: -18%; animation-delay: 1.1s; }
/* 移到左側中段：原本 bottom 20% 會壓到「馬丁尼」那張卡 */
.dl-left { top: 42%; left: -19%; animation-delay: 1.4s; }

.dl-line {
  position: absolute;
  width: 40px; height: 1px;
  background: linear-gradient(90deg, var(--accent-gold), transparent);
  box-shadow: 0 0 8px var(--accent-gold);
}
.dl-top .dl-line { top: 100%; left: 10%; transform: rotate(55deg); transform-origin: left; }
.dl-right .dl-line { top: 50%; right: 100%; }
.dl-left .dl-line { top: 50%; left: 100%; background: linear-gradient(-90deg, var(--accent-purple), transparent); box-shadow: 0 0 8px var(--accent-purple); }

.dl-box {
  padding: 8px 14px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0) 60%),
    rgba(13, 14, 34, 0.86);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid rgba(255, 181, 71, 0.3);
  border-radius: 11px;
  box-shadow:
    0 2px 6px rgba(0, 0, 0, 0.3),
    0 10px 30px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.dl-left .dl-box { border-color: rgba(123, 92, 255, 0.4); }
.dl-label {
  font-size: 10px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.dl-value {
  font-family: 'Orbitron', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--accent-gold);
  margin-top: 2px;
}
.dl-left .dl-value { color: var(--accent-purple); }

@keyframes dataFade {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

/* 掃描光線 */
.scan-line {
  position: absolute;
  top: 0; left: 8%; right: 8%;
  height: 1px;
  background: linear-gradient(90deg,
    transparent,
    rgba(0, 229, 255, 0.35) 28%,
    rgba(0, 229, 255, 0.7) 50%,
    rgba(0, 229, 255, 0.35) 72%,
    transparent);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.45);
  animation: scanMove 7s ease-in-out infinite;
  opacity: 0.42;
}

@keyframes scanMove {
  0% { top: 0; opacity: 0; }
  10% { opacity: 0.8; }
  90% { opacity: 0.8; }
  100% { top: 100%; opacity: 0; }
}

/* ====== 底部特色區 ====== */
.features {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1400px;
  margin: 0 auto 80px;
  padding: 0 40px;
}

.feat {
  padding: 28px 24px;
  background: rgba(15, 16, 40, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 18px;
  transition: all 0.3s;
  cursor: pointer;
}
.feat:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 181, 71, 0.4);
  box-shadow: 0 12px 32px rgba(255, 77, 141, 0.15);
}

.feat-icon {
  font-size: 32px;
  margin-bottom: 12px;
}
.feat-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}
.feat-desc {
  font-size: 13px;
  color: var(--text-dim);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ====== RWD ====== */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    /* 手機版導覽列是兩行（約 102px），留白要蓋過它 */
    padding-top: 152px;
  }
  .hero-desc { margin: 0 auto 36px; }
  .cta-row { justify-content: center; }
  .stats { justify-content: center; }
  .hero-visual { height: 500px; margin-top: 40px; }
  /* 手機版改成兩行：logo + 頭像在第一行，導覽連結佔滿第二行 */
  .navbar {
    flex-wrap: wrap;
    padding: 10px 16px;
    gap: 8px 12px;
  }
  .nav-links {
    order: 3;
    flex-basis: 100%;
    justify-content: space-between;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 4px 2px 2px;
    scrollbar-width: none;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a {
    font-size: 13px;
    white-space: nowrap;
    padding: 4px 2px;
  }
  .nav-links a::after { display: none; }
  .features { grid-template-columns: repeat(2, 1fr); }
}

/* 窄螢幕放不下環繞卡片：酒杯本身就佔 268px，硬留會互相重疊 */
@media (max-width: 900px) {
  .float-card,
  .data-label,
  .scan-line { display: none; }
  .orbit-3 { display: none; }
  .hero-visual { height: 480px; }
}

@media (max-width: 640px) {
  .navbar { padding: 10px 14px; }
  .btn-login span { display: none; }
  .nav-links { gap: 2px; }
  .nav-links a { font-size: 12.5px; }
  .hero { padding: 152px 20px 40px; }
  .hero-visual { height: 430px; margin-top: 16px; }
  .holo-glass { transform: scale(0.86); height: 440px; }
  .features { grid-template-columns: 1fr; padding: 0 20px; }
  .stats { gap: 16px; }
  .stat-num { font-size: 24px; }
}

/* ===== 手機降級：關掉吃 GPU 的 blur / backdrop-filter / glow 大塊 ===== */
@media (hover: none) and (pointer: coarse), (max-width: 768px) {
  /* 大塊背景光暈在手機上 filter:blur(120px) 是 GPU 殺手 */
  .glow { display: none !important; }

  /* 把 backdrop-filter 全部關掉，改用實心背景 */
  *,
  *::before,
  *::after {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }

  /* 把仰賴透明 + 背景模糊的卡片改成實心，避免穿透變花 */
  .navbar,
  .card,
  .post,
  .publish-card,
  .user-menu,
  .profile-card,
  .form-card {
    background: rgba(13, 14, 34, 0.97) !important;
  }

  /* 關掉常駐無限動畫，省 GPU；AI loading 環是短暫出現，保留 */
  .glow,
  .publish-glow,
  .publish-card,
  .btn-publish-hero,
  .btn-publish-hero .bp-spark,
  .publish-locked .publish-lock-icon {
    animation: none !important;
  }
}