/* ========================================
   中天法門第一動畫官網 - 核心樣式系統
   ======================================== */

/* ---------- CSS 變數 ---------- */
:root {
  /* 色彩系統 */
  --color-gold: #FFD700;
  --color-gold-light: #FDE68A;
  --color-gold-dark: #B8860B;
  --color-amber: #F59E0B;
  --color-purple: #8B5CF6;
  --color-purple-dark: #6D28D9;

  /* 背景色 */
  --bg-space: #000A14;
  --bg-space-light: #001122;
  --bg-card: rgba(0, 17, 34, 0.85);
  --bg-glass: rgba(0, 17, 34, 0.6);

  /* 文字色 */
  --text-primary: #FFFBEB;
  --text-secondary: #FEF3C7;
  --text-muted: #94A3B8;

  /* 邊框 */
  --border-gold: rgba(255, 215, 0, 0.3);
  --border-gold-hover: rgba(255, 215, 0, 0.6);

  /* 陰影 */
  --shadow-glow: 0 0 30px rgba(255, 215, 0, 0.3);
  --shadow-glow-strong: 0 0 50px rgba(255, 215, 0, 0.5);

  /* 間距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 5rem;

  /* 圓角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* 動畫 */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* 容器 */
  --container-max: 1200px;
  --nav-height: 70px;
}

/* ---------- 重置與基礎 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Noto Sans TC', 'PingFang TC', 'Microsoft JhengHei', system-ui, -apple-system, sans-serif;
  background: var(--bg-space);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- 自訂捲軸 (Scrollbar) ---------- */
/* Webkit (Chrome, Safari, Edge) */
::-webkit-scrollbar {
  width: 14px;
  height: 14px;
}

::-webkit-scrollbar-track {
  background: #000a14;
  border-left: 1px solid rgba(255, 215, 0, 0.1);
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.9);
}

::-webkit-scrollbar-thumb {
  background: repeating-linear-gradient(45deg,
      #B8860B,
      #B8860B 5px,
      #FFD700 5px,
      #FFD700 10px);
  border-radius: var(--radius-full);
  border: 3px solid #000a14;
  /* Padding effect */
  box-shadow: 0 0 8px rgba(255, 215, 0, 0.6);
}

::-webkit-scrollbar-thumb:hover {
  background: repeating-linear-gradient(45deg,
      #FFD700,
      #FFD700 5px,
      #FFFACD 5px,
      #FFFACD 10px);
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.9);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-gold) var(--bg-space-light);
}

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700&family=Noto+Serif+TC:wght@400;600;700&display=swap');

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: 'Noto Serif TC', serif;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-gold);
}

a {
  color: var(--color-gold-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-gold);
}

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

/* ---------- 容器與佈局 ---------- */
.container {
  width: min(var(--container-max), 92vw);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

/* ---------- 星空背景 ---------- */
.cosmos-bg {
  position: fixed;
  inset: 0;
  z-index: -10;
  background: linear-gradient(180deg, var(--bg-space) 0%, var(--bg-space-light) 50%, var(--bg-space) 100%);
  overflow: hidden;
}

.cosmos-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(2px 2px at 20px 30px, var(--color-gold), transparent),
    radial-gradient(2px 2px at 40px 70px, var(--color-gold-light), transparent),
    radial-gradient(1px 1px at 90px 40px, white, transparent),
    radial-gradient(2px 2px at 160px 120px, var(--color-gold), transparent),
    radial-gradient(1px 1px at 230px 80px, white, transparent),
    radial-gradient(2px 2px at 300px 150px, var(--color-gold-light), transparent);
  background-size: 350px 200px;
  animation: twinkle 8s ease-in-out infinite alternate;
}

@keyframes twinkle {
  0% {
    opacity: 0.4;
  }

  100% {
    opacity: 1;
  }
}

/* 網格覆蓋層 */
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 215, 0, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 30s linear infinite;
  pointer-events: none;
}

@keyframes gridMove {
  from {
    transform: translate(0, 0);
  }

  to {
    transform: translate(60px, 60px);
  }
}

/* ---------- 導覽列 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(0, 10, 20, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-gold);
  transition: background var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(0, 10, 20, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.navbar::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  animation: scanLine 4s linear infinite;
}

@keyframes scanLine {
  from {
    transform: translateX(-100%);
  }

  to {
    transform: translateX(100%);
  }
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-logo {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: contain;
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.4);
  animation: sacredGlow 3s ease-in-out infinite alternate;
}

@keyframes sacredGlow {
  0% {
    box-shadow: 0 0 5px rgba(255, 215, 0, 0.4), inset 0 0 5px rgba(255, 215, 0, 0.2);
    transform: translateY(0) scale(1);
    filter: brightness(1);
  }

  100% {
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.8), 0 0 10px rgba(255, 99, 71, 0.3);
    transform: translateY(-2px) scale(1.05);
    /* 輕微浮動與放大 */
    filter: brightness(1.1);
  }
}

.nav-brand-text {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  list-style: none;
}

.nav-link {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  background: rgba(255, 215, 0, 0.1);
  color: var(--color-gold);
}

.nav-link.active {
  color: var(--color-gold);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--color-gold);
  border-radius: var(--radius-full);
}

/* 漢堡選單 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-gold);
  transition: all var(--transition-fast);
}

/* ---------- Hero 區塊 ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + var(--spacing-xl)) var(--spacing-sm) var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  /* 宇宙脈動動畫 */
  animation: cosmicPulse 15s ease-in-out infinite alternate;
  transform-origin: center center;
}

@keyframes cosmicPulse {
  0% {
    transform: scale(1.05);
    opacity: 0.4;
    filter: brightness(1);
  }

  50% {
    opacity: 0.6;
    filter: brightness(1.1);
  }

  100% {
    transform: scale(1.15);
    opacity: 0.5;
    filter: brightness(1.2) hue-rotate(5deg);
  }
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, var(--bg-space) 70%);
}

.hero-content {
  max-width: 800px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-gold-light);
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 0.8s ease forwards;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-title .highlight {
  background: linear-gradient(90deg, #FFFACD, var(--color-gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.5));
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gold), var(--color-amber));
  color: var(--bg-space);
  border-color: var(--color-gold);
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-strong);
  color: var(--bg-space);
}

.btn-outline {
  background: transparent;
  color: var(--color-gold-light);
  border-color: var(--border-gold);
}

.btn-outline:hover {
  background: rgba(255, 215, 0, 0.1);
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 0;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  overflow: hidden;
  position: relative;
  min-height: 100%;
}

/* For cards without images, restore internal padding */
.card:not(:has(.card-image-wrap)) {
  padding: var(--spacing-lg);
}

.card-image-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: rgba(0, 0, 0, 0.3);
  border-bottom: 1px solid var(--border-gold);
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.card:hover .card-image-wrap img {
  transform: scale(1.1);
}

.card-content {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.card:hover {
  border-color: var(--border-gold-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 215, 0, 0.2);
  border-radius: 50%;
  margin-bottom: var(--spacing-md);
  color: var(--color-gold);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(5px);
  border: 1px solid var(--border-gold);
}

/* Offset to overlap image ONLY when image-wrap precedes it */
.card-image-wrap+.card-content .card-icon {
  margin-top: -45px;
}

.card-icon svg {
  width: 32px;
  height: 32px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-gold);
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 卡片網格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* 法門特色區塊背景 */
.features-section {
  background: linear-gradient(180deg, rgba(0, 17, 34, 0.6) 0%, rgba(0, 10, 20, 0.8) 100%);
  border-top: 1px solid var(--border-gold);
}

/* ---------- 特色列表 ---------- */
.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-glass);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-gold);
  transition: all var(--transition-normal);
}

.feature-item:hover {
  border-color: var(--border-gold-hover);
  background: rgba(255, 215, 0, 0.05);
}

.feature-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--color-gold);
}

.feature-content h4 {
  font-size: 1rem;
  color: var(--color-gold-light);
  margin-bottom: 4px;
}

.feature-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ---------- CTA 區塊 ---------- */
.cta-section {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(255, 215, 0, 0.1));
  border-top: 1px solid var(--border-gold);
  border-bottom: 1px solid var(--border-gold);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- 頁面標題區塊 (內頁用) ---------- */
.page-header {
  padding: calc(var(--nav-height) + var(--spacing-2xl)) 0 var(--spacing-xl);
  text-align: center;
  position: relative;
  background: linear-gradient(180deg, rgba(0, 17, 34, 0.4) 0%, transparent 100%);
}

.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--spacing-sm);
  color: var(--color-gold);
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- 內頁內容區塊 ---------- */
.page-content {
  padding: var(--spacing-xl) 0 var(--spacing-2xl);
}

.content-block {
  margin-bottom: var(--spacing-2xl);
}

.block-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--spacing-md);
  color: var(--color-gold);
}

.block-text {
  color: var(--text-secondary);
  line-height: 1.8;
}

.block-text p {
  margin-bottom: var(--spacing-md);
}

/* 內容網格 */
.content-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.content-grid.two-columns {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.text-col {
  color: var(--text-secondary);
  line-height: 1.8;
}

.text-col p {
  margin-bottom: var(--spacing-md);
}

/* 高亮區塊 */
.highlight-box {
  background: rgba(255, 215, 0, 0.05);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}

.highlight-box h3 {
  color: var(--color-gold);
  margin-bottom: var(--spacing-sm);
}

.highlight-box ul {
  list-style: none;
  color: var(--text-secondary);
}

.highlight-box li {
  margin-bottom: var(--spacing-xs);
  padding-left: 1.5rem;
  position: relative;
}

.highlight-box li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--color-gold);
}

/* ---------- 頁尾 ---------- */
.footer {
  background: rgba(0, 10, 20, 0.9);
  border-top: 1px solid var(--border-gold);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer-link:hover {
  color: var(--color-gold);
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-top: var(--spacing-md);
}

/* ---------- 滾動動畫 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 響應式設計 ---------- */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .nav-brand-text {
    font-size: 1.05rem;
    letter-spacing: 0;
  }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(0, 10, 20, 0.98);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-xs);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-gold);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    text-align: center;
    padding: var(--spacing-sm);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-toggle {
    display: flex;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .card {
    padding: var(--spacing-md);
  }
}

/* ---------- 無障礙設計 ---------- */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 焦點樣式 */
:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

/* 3D Text Animation */
.text-3d {
  opacity: 1 !important;
  /* Force visible, override .hero-title opacity:0 */
  color: #FFD700;
  text-shadow:
    0 1px 0 #c6a300,
    0 2px 0 #aa8c00,
    0 3px 0 #8e7500,
    0 4px 0 #735e00,
    0 10px 20px rgba(0, 0, 0, 0.4);
  animation: float3D 5s ease-in-out infinite alternate;
  display: inline-block;
  transform-style: preserve-3d;
}

@keyframes float3D {
  0% {
    transform: perspective(1000px) rotateX(10deg) translateY(0);
    text-shadow:
      0 1px 0 #c6a300,
      0 2px 0 #aa8c00,
      0 3px 0 #8e7500,
      0 4px 0 #735e00,
      0 10px 20px rgba(0, 0, 0, 0.4);
  }

  100% {
    transform: perspective(1000px) rotateX(0deg) translateY(-15px);
    text-shadow:
      0 1px 0 #c6a300,
      0 2px 0 #aa8c00,
      0 3px 0 #8e7500,
      0 4px 0 #735e00,
      0 25px 30px rgba(0, 0, 0, 0.2);
  }
}