/* ==========================================================================
   FSMF2026 LP Design System: 静寂のメタバース・デジタルギャラリー
   ========================================================================== */

/* --- Custom Properties --- */
:root {
  --bg-primary: #0D0F14;         /* 神秘的で深いミッドナイトブラック・パープル */
  --bg-secondary: #161922;       /* 少し明るめのミッドナイトネイビー */
  --bg-glass: rgba(18, 21, 29, 0.7);
  
  --text-primary: #F4EFEA;       /* 温かみのあるオフホワイト・ベージュ */
  --text-secondary: #B5B2AD;     /* 二次テキスト・コントラスト控えめ */
  --text-muted: #7E7C78;         /* 非アクティブ・補助テキスト */
  
  --accent-gold: #E2B65C;        /* 月光や星空を彷彿とさせる、より透明感のある星金 */
  --accent-gold-rgb: 226, 182, 92;
  --accent-violet: #8A5CF5;      /* イラストに調和する神秘的なバイオレット */
  --accent-violet-rgb: 138, 92, 245;
  --accent-teal: #499F98;        /* メタバースを表現するソフトシアン・ティール */
  --border-color: rgba(244, 239, 234, 0.08);
  --border-color-glow: rgba(226, 182, 92, 0.25);
  
  /* Typography */
  --font-serif-ja: 'Shippori Mincho', 'Noto Serif JP', Georgia, serif;
  --font-serif-en: 'Playfair Display', serif;
  --font-sans: 'Work Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* --- Reset & Base Elements --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.7;
  letter-spacing: 0.03em;
  -webkit-font-smoothing: antialiased;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  /* 夜明けの物語を表現する縦長サンライズグラデーション */
  background: linear-gradient(
    180deg, 
    #080A0F 0%,     /* 最上部：まだ薄暗い夜空のミッドナイト */
    #121121 25%,    /* 朝焼け前：宵のバイオレット */
    #241528 50%,    /* 中間：徐々に白むマゼンタパープル */
    #4A1D1A 75%,    /* 下部：地平線の熱を帯びるダークレッド */
    #813016 100%    /* 最下部：昇る太陽のアンビエントオレンジ */
  );
  background-attachment: scroll;
  background-size: 100% 100%;
}

/* --- Decorative Backgrounds --- */
.bg-grid-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background-image: 
    linear-gradient(rgba(244, 239, 234, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 234, 0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.bg-gradient-glow {
  position: fixed;
  top: -10%;
  right: -10%;
  width: 70%;
  height: 70%;
  z-index: -1;
  background: radial-gradient(
    circle, 
    rgba(var(--accent-violet-rgb), 0.08) 0%, 
    rgba(var(--accent-gold-rgb), 0.06) 40%, 
    rgba(73, 159, 152, 0.03) 80%, 
    transparent 100%
  );
  filter: blur(90px);
  pointer-events: none;
}

/* --- App Layout Layout --- */
.app-container {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
}

.container-medium {
  max-width: 1000px;
  margin: 0 auto;
}

/* --- Utility Classes --- */
.text-center { text-align: center; }
.mobile-only { display: none; }

@media (max-width: 768px) {
  .mobile-only { display: block; }
}

/* --- Section Typography --- */
.section-title {
  font-family: var(--font-serif-ja);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  position: relative;
  letter-spacing: 0.05em;
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background-color: var(--accent-gold);
  margin-top: 1rem;
}

.section-title.text-center::after {
  margin-left: auto;
  margin-right: auto;
}

.paragraph {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.font-featured {
  font-size: 1.15rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* --- Announcement Bar (アナウンスバー) --- */
.announcement-bar {
  background: linear-gradient(90deg, #121021 0%, #4D1910 50%, #121021 100%);
  border-bottom: 1px solid var(--border-color);
  height: 44px; /* 高さを44pxに固定 */
  text-align: center;
  position: relative;
  z-index: 100;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  overflow: hidden;
}

.announcement-badge {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--bg-primary);
  background: var(--accent-gold);
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

/* Slides Carousel wrapper */
.announcement-slides-wrapper {
  height: 24px;
  overflow: hidden;
  position: relative;
  flex-grow: 0;
}

.announcement-slides {
  display: flex;
  flex-direction: column;
  transition: transform 0.8s cubic-bezier(0.76, 0, 0.24, 1); /* スムーズなイージングで縦スライド */
}

.announcement-text {
  height: 24px;
  line-height: 24px;
  font-size: 0.8rem;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  font-weight: 500;
  display: flex;
  align-items: center;
  white-space: nowrap;
}

/* --- Global Header Navigation (ナビゲーション) --- */
.global-header {
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1.5px solid var(--border-color);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
  transition: var(--transition-smooth);
}

.global-nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.nav-logo {
  font-family: var(--font-serif-en);
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  user-select: none;
  flex-shrink: 0;
}

.nav-logo .logo-serif {
  color: var(--accent-gold);
}

.nav-logo .logo-num {
  font-weight: 300;
  color: var(--text-secondary);
}

/* 中央の独立したCTAボタン（常時表示） */
.nav-cta-center-wrapper {
  flex-grow: 0;
  text-align: center;
  z-index: 1002;
}

.btn-nav-cta-center {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--accent-gold);
  background: var(--accent-gold);
  color: var(--bg-primary);
  text-decoration: none;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 0.85rem;
  box-shadow: 0 4px 15px rgba(var(--accent-gold-rgb), 0.25);
  transition: var(--transition-smooth);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.btn-nav-cta-center:hover {
  background-color: var(--text-primary);
  border-color: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.15);
  transform: translateY(-1.5px);
}

.cta-text-pc {
  display: inline;
}

.cta-text-mobile {
  display: none;
}

/* 右側ブロック */
.nav-right-block {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 24px; /* 3カラム化したため30pxから24pxにしてPCでの余裕を確保 */
  align-items: center;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: var(--transition-fast);
}

.nav-links a:hover {
  color: var(--accent-gold);
}

/* PC用の外部リンク装飾 */
.link-external {
  position: relative;
}

.nav-cta-item {
  display: none; /* PCでは非表示 */
}

/* ハンバーガートグルボタン（基本は非表示） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1002;
}

.hamburger-line {
  width: 100%;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  transform-origin: left center;
}

/* ==========================================================================
   1. Hero Section (ファーストビュー)
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 0;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-content-col {
  text-align: left;
}

.hero-visual-col {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* --- Main Art Frame (額縁スタイル) --- */
.main-art-frame {
  width: 100%;
  max-width: 460px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-glass);
  padding: 16px;
  border-radius: 12px;
  box-shadow: 
    0 30px 60px rgba(0, 0, 0, 0.5),
    0 0 40px rgba(var(--accent-violet-rgb), 0.05);
  position: relative;
  transition: var(--transition-smooth);
  overflow: hidden;
}

.main-art-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.03) 0%,
    rgba(255, 255, 255, 0) 50%,
    rgba(0, 0, 0, 0.3) 100%
  );
  z-index: 2;
  pointer-events: none;
}

.main-art-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
  filter: brightness(0.95) contrast(1.02);
  transition: var(--transition-smooth);
}

/* Hover Interactive */
.main-art-frame:hover {
  border-color: var(--border-color-glow);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 40px 80px rgba(0, 0, 0, 0.6),
    0 0 50px rgba(var(--accent-violet-rgb), 0.15);
}

.main-art-frame:hover .main-art-image {
  filter: brightness(1.02) contrast(1.02);
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-serif-en);
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  border: 1px solid var(--border-color-glow);
  padding: 6px 18px;
  border-radius: 20px;
  background: rgba(var(--accent-gold-rgb), 0.05);
  margin-bottom: 2rem;
  animation: pulse-border 3s infinite ease-in-out;
}

.hero-title {
  font-family: var(--font-serif-ja);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.hero-title .eng-sub {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.hero-title .main-concept {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 0 3rem 0;
  line-height: 1.8;
}

/* --- Countdown Timer --- */
.countdown-container {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 16px;
  padding: 24px 40px;
  max-width: 600px;
  margin: 0 0 3rem 0;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.countdown-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-gold), transparent);
}

.countdown-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-gold);
  margin-bottom: 1rem;
}

.timer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.timer-segment {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.timer-number {
  font-family: var(--font-serif-en);
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  text-shadow: 0 0 10px rgba(var(--accent-gold-rgb), 0.15);
}

.timer-unit {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 4px;
}

/* --- Hero Facts --- */
.hero-meta {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 3.5rem;
}

.meta-item {
  display: flex;
  align-items: center;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.meta-icon {
  color: var(--accent-gold);
  margin-right: 8px;
  font-size: 0.9rem;
}

/* --- Buttons --- */
.hero-cta-wrapper {
  margin-bottom: 1.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  text-decoration: none;
  font-weight: 600;
  padding: 18px 44px;
  border-radius: 40px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary .btn-text {
  font-family: var(--font-serif-ja);
  letter-spacing: 0.08em;
  font-size: 1.1rem;
}

.btn-primary .btn-arrow {
  margin-left: 12px;
  font-family: var(--font-serif-en);
  font-size: 1.2rem;
  transition: var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--accent-gold);
  color: var(--bg-primary);
  box-shadow: 0 15px 40px rgba(var(--accent-gold-rgb), 0.35);
  transform: translateY(-3px);
}

.btn-primary:hover .btn-arrow {
  transform: translateX(6px);
}

.btn-large {
  padding: 22px 56px;
}

.cta-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 10px;
}

/* --- Hero CTA Microcopies --- */
.hero-microcopies {
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.hero-microcopies .micro-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
}

/* ==========================================================================
   2. Introduction Section
   ========================================================================== */
.intro-section {
  padding: 120px 0;
  position: relative;
}

.section-decor-line {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--border-color), transparent);
}

.grid-2col {
  display: grid;
  grid-template-columns: 1.1fr 1.3fr;
  gap: 64px;
  align-items: center;
}

.intro-visual {
  display: flex;
  justify-content: center;
}

/* --- Mirror Graphic (明鏡) --- */
.visual-mirror-frame {
  width: 320px;
  height: 480px;
  border: 1px solid var(--border-color);
  background: linear-gradient(135deg, rgba(244, 239, 234, 0.01), rgba(244, 239, 234, 0.03));
  border-radius: 160px 160px 20px 20px;
  padding: 16px;
  position: relative;
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.mirror-surface {
  width: 100%;
  height: calc(100% - 40px);
  border-radius: 145px 145px 15px 15px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 80%);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 20px 40px rgba(255, 255, 255, 0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.mirror-surface::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.03), transparent);
  transform: rotate(45deg);
  animation: shine 8s infinite linear;
}

.mirror-reflection-text {
  font-family: var(--font-serif-ja);
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: rgba(244, 239, 234, 0.04);
  user-select: none;
  pointer-events: none;
  filter: blur(1px);
}

.mirror-caption {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --- Intro Text & Quote --- */
.featured-quote {
  background: var(--bg-secondary);
  border-left: 2px solid var(--accent-gold);
  padding: 24px 30px;
  margin: 2rem 0;
  border-radius: 0 12px 12px 0;
}

.quote-text {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.quote-bullets {
  list-style: none;
}

.quote-bullets li {
  position: relative;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

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

/* ==========================================================================
   3. Highlights Section
   ========================================================================== */
.highlights-section {
  padding: 120px 0;
  position: relative;
}

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 4rem;
}

.highlight-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  transition: var(--transition-smooth);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.highlight-card:hover {
  border-color: var(--border-color-glow);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.card-number {
  font-family: var(--font-serif-en);
  font-size: 3rem;
  font-weight: 300;
  color: rgba(var(--accent-gold-rgb), 0.25);
  line-height: 1;
  margin-bottom: 1.5rem;
}

.highlight-card:hover .card-number {
  color: var(--accent-gold);
  text-shadow: 0 0 15px rgba(var(--accent-gold-rgb), 0.3);
  transition: var(--transition-smooth);
}

.card-title {
  font-family: var(--font-serif-ja);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.card-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   4. Schedule & Speakers Section
   ========================================================================== */
.schedule-section {
  padding: 120px 0;
  position: relative;
}

.timeline {
  margin-top: 4rem;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 120px;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, var(--border-color), transparent);
}

.timeline-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  margin-bottom: 60px;
  position: relative;
}

.timeline-date {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding-top: 8px;
  position: relative;
}

.timeline-date::after {
  content: '';
  position: absolute;
  right: -45px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--accent-gold);
  border: 2px solid var(--bg-primary);
  z-index: 2;
  box-shadow: 0 0 10px var(--accent-gold);
}

.date-day {
  font-family: var(--font-serif-en);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
}

.date-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.event-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--accent-gold);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

.timeline-content {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.event-title {
  font-family: var(--font-serif-ja);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.event-subtitle {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-top: 6px;
}

/* --- Event Banner Gallery Style --- */
.event-banner-wrapper {
  margin-bottom: 2rem;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  box-shadow: 
    0 15px 35px rgba(0, 0, 0, 0.4),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  position: relative;
  transition: var(--transition-smooth);
}

.event-banner-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.04) 0%,
    rgba(255, 255, 255, 0) 60%,
    rgba(0, 0, 0, 0.2) 100%
  );
  z-index: 2;
  pointer-events: none;
}

.event-banner {
  width: 100%;
  height: auto;
  display: block;
  filter: brightness(0.9) contrast(1.02);
  transition: var(--transition-smooth);
  object-fit: cover;
}

/* Gallery Hover effect */
.event-banner-wrapper:hover {
  border-color: var(--border-color-glow);
  transform: translateY(-6px) scale(1.01);
  box-shadow: 
    0 25px 50px rgba(var(--accent-gold-rgb), 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.event-banner-wrapper:hover .event-banner {
  filter: brightness(1.05) contrast(1.02);
}

/* --- Speaker Grid --- */
.speaker-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.speaker-profile {
  display: flex;
  align-items: center;
  gap: 16px;
}

.speaker-avatar-placeholder {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif-en);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent-gold);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.speaker-info {
  display: flex;
  flex-direction: column;
}

.speaker-name {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
}

.speaker-title {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.speaker-separator {
  font-family: var(--font-serif-en);
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--text-muted);
}

.event-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* --- Pending State --- */
.status-pending .timeline-date::after {
  background-color: var(--bg-primary);
  border-color: var(--text-muted);
  box-shadow: none;
}

.status-pending .date-day {
  color: var(--text-muted);
}

.badge-pending {
  color: var(--text-muted);
}

.status-pending .timeline-content {
  border-style: dashed;
  background: rgba(255, 255, 255, 0.005);
}

.status-pending .event-title {
  color: var(--text-secondary);
}

/* ==========================================================================
   5. Guide & FAQ Section (アコーディオン)
   ========================================================================== */
.guide-faq-section {
  padding: 120px 0;
  position: relative;
}

/* --- Spatial Box --- */
.spatial-guide-box {
  background: linear-gradient(135deg, rgba(73, 159, 152, 0.03) 0%, rgba(var(--accent-gold-rgb), 0.03) 100%);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 4rem;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.guide-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 2rem;
}

.guide-icon {
  font-size: 1.75rem;
}

.guide-header h3 {
  font-family: var(--font-serif-ja);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* --- Accordion --- */
.guide-accordion-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.accordion-item {
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--text-primary);
  font-family: var(--font-sans);
  transition: var(--transition-fast);
}

.step-num {
  font-family: var(--font-serif-en);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-gold);
  border: 1px solid var(--border-color-glow);
  padding: 2px 8px;
  border-radius: 4px;
  margin-right: 16px;
  background: rgba(var(--accent-gold-rgb), 0.05);
}

.step-title {
  font-size: 1.05rem;
  font-weight: 600;
  flex-grow: 1;
}

.accordion-arrow {
  font-family: var(--font-serif-en);
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  background: rgba(0, 0, 0, 0.1);
}

.accordion-panel p {
  padding: 20px 24px 24px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Accordion Active State */
.accordion-item.active {
  border-color: var(--border-color-glow);
  box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.accordion-item.active .accordion-arrow {
  transform: rotate(180deg);
  color: var(--accent-gold);
}

/* --- Guide Footer Link --- */
.guide-footer-link {
  margin-top: 2rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1.5rem;
  text-align: center;
}

.guide-footer-link p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.guide-footer-link a {
  color: var(--accent-gold);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-gold);
  transition: var(--transition-fast);
  font-weight: 500;
}

.guide-footer-link a:hover {
  color: var(--text-primary);
  border-bottom-style: solid;
}

/* --- FAQ List --- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 24px;
}

.faq-question {
  font-family: var(--font-serif-ja);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.faq-answer {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   6. Epilogue & Final CTA
   ========================================================================== */
.footer-cta-section {
  padding: 140px 0 80px 0;
  position: relative;
  overflow: hidden;
}

.footer-cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.footer-glow {
  position: absolute;
  bottom: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 60%;
  z-index: -1;
  background: radial-gradient(
    circle, 
    rgba(230, 92, 26, 0.22) 0%,     /* 燃えるような太陽のオレンジ */
    rgba(226, 182, 92, 0.12) 40%,   /* 朝日の眩しいゴールド */
    transparent 70%
  );
  filter: blur(80px);
  pointer-events: none;
}

.epilogue-title {
  font-family: var(--font-serif-ja);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 2.5rem;
  color: var(--text-primary);
}

.epilogue-lead {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 3.5rem auto;
  line-height: 1.8;
}

.final-cta-wrapper {
  margin-bottom: 4rem;
}

/* --- X Share Box --- */
.share-box {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 24px;
  max-width: 420px;
  margin: 0 auto 5rem auto;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.share-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--text-secondary);
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-share:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.x-icon {
  flex-shrink: 0;
}

/* --- Footer Links --- */
.footer-links {
  margin-top: 4rem;
  border-top: 1px solid var(--border-color);
  padding-top: 2rem;
}

.cooperation {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.cooperation a {
  color: var(--accent-gold);
  text-decoration: none;
  border-bottom: 1px dotted var(--accent-gold);
  transition: var(--transition-fast);
}

.cooperation a:hover {
  color: var(--text-primary);
  border-bottom-style: solid;
}

.copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   7. LP Assistant (EarthKey) Widget
   ========================================================================== */
.aiph-character-widget {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 999;
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 12px;
}

/* --- Speech Bubble --- */
.aiph-speech-bubble {
  max-width: 280px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color-glow);
  padding: 16px 20px;
  border-radius: 16px 16px 4px 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  position: relative;
  opacity: 0;
  transform: translateY(10px) scale(0.95);
  pointer-events: none;
  transition: 
    opacity 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), 
    transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.aiph-speech-bubble.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.aiph-close {
  position: absolute;
  top: 6px;
  right: 12px;
  font-size: 1.1rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.aiph-close:hover {
  color: var(--text-primary);
}

.aiph-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Avatar Bubble --- */
.aiph-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border-color-glow);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: var(--transition-smooth);
}

.aiph-emoji {
  font-size: 1.5rem;
}

.aiph-avatar:hover {
  transform: scale(1.08) rotate(5deg);
  border-color: var(--accent-gold);
}

.aiph-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1.5px solid var(--accent-gold);
  opacity: 0;
  pointer-events: none;
  animation: pulse-avatar 2s infinite ease-out;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes pulse-border {
  0%, 100% { border-color: rgba(218, 178, 87, 0.25); box-shadow: 0 0 5px rgba(218, 178, 87, 0.05); }
  50% { border-color: rgba(218, 178, 87, 0.6); box-shadow: 0 0 15px rgba(218, 178, 87, 0.2); }
}

@keyframes pulse-avatar {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.4); opacity: 0; }
}

@keyframes shine {
  0% { transform: translate(-50%, -50%) rotate(45deg); }
  100% { transform: translate(150%, 150%) rotate(45deg); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 992px) {
  /* 旧CTAボタン用定義の削除 */
  .btn-nav-cta {
    display: none;
  }

  /* 中央の常時表示CTAボタンをスマホ用に最適化 */
  .cta-text-pc {
    display: none !important;
  }

  .cta-text-mobile {
    display: inline !important;
  }

  .btn-nav-cta-center {
    font-size: 0.8rem;
    padding: 8px 16px;
    border-radius: 20px;
    box-shadow: 0 4px 10px rgba(var(--accent-gold-rgb), 0.2);
  }

  /* ロゴサイズをスマホ幅に最適化 */
  .nav-logo {
    font-size: 1.15rem;
  }

  /* ハンバーガートグルボタンを表示 */
  .nav-toggle {
    display: flex;
  }

  /* ハンバーガーから「×」への変形アニメーション */
  .nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
    background-color: var(--accent-gold);
  }

  .nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: scale(0);
  }

  .nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
    background-color: var(--accent-gold);
  }

  /* モバイル用ナビゲーションメニューの挙動（高級ガラスモーフィズム） */
  .nav-links {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 28px;
    position: fixed;
    top: 74px; /* ヘッダーの高さ */
    left: 0;
    width: 100%;
    height: calc(100vh - 74px);
    padding: 50px 30px 60px 30px;
    background: rgba(13, 16, 23, 0.98); /* 深みのあるミッドナイト */
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-top: 1.5px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    overflow-y: auto;
    
    /* 初期状態は上方に隠し、透過 */
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: 
      opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1),
      transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  /* 開いている時の状態 */
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    width: 100%;
    text-align: center;
    padding: 10px 0;
    border-bottom: 1.5px solid rgba(255, 255, 255, 0.03);
    transition: var(--transition-fast);
  }

  .nav-links a:hover,
  .nav-links a:active {
    color: var(--accent-gold);
    border-bottom-color: rgba(226, 182, 92, 0.2);
  }

  /* モバイル用CTA項目を表示 */
  .nav-cta-item {
    display: block;
    width: 100%;
    margin-top: 15px;
  }

  .btn-nav-cta-mobile {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    border: 1.5px solid var(--accent-gold);
    background: var(--accent-gold);
    color: var(--bg-primary);
    text-decoration: none;
    font-weight: 700;
    padding: 14px 24px;
    border-radius: 30px;
    font-size: 1rem;
    box-shadow: 0 8px 24px rgba(var(--accent-gold-rgb), 0.25);
    transition: var(--transition-smooth);
  }

  .btn-nav-cta-mobile:hover,
  .btn-nav-cta-mobile:active {
    background-color: var(--text-primary);
    border-color: var(--text-primary);
    color: var(--bg-primary);
  }

  .global-nav { 
    padding: 16px 20px; /* 横余白を少し縮めて極小幅での崩れを防止 */
    height: 74px; /* 高さを固定してヘッダー位置を正確に保つ */
    gap: 10px; /* 要素間の隙間を小さく */
  }

  .hero-grid { grid-template-columns: 1fr; gap: 48px; text-align: center; }
  .hero-content-col { text-align: center; }
  .hero-title { font-size: 3rem; }
  .hero-lead { margin: 0 auto 3rem auto; }
  .countdown-container { margin: 0 auto 3rem auto; }
  .hero-meta { justify-content: center; }
  
  .grid-2col { grid-template-columns: 1fr; gap: 48px; }
  .visual-mirror-frame { height: 420px; max-width: 280px; }
  .highlights-grid { grid-template-columns: 1fr; gap: 24px; }
  .timeline::before { left: 30px; }
  .timeline-item { grid-template-columns: 1fr; gap: 16px; padding-left: 50px; }
  .timeline-date { align-items: flex-start; }
  .timeline-date::after { left: -24px; right: auto; }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  .hero-title { font-size: 2.25rem; }
  .countdown-container { padding: 18px 24px; }
  .timer-number { font-size: 2rem; }
  .timer-grid { gap: 8px; }
  .section-title { font-size: 1.75rem; }
  .event-title { font-size: 1.25rem; }
  .btn-primary { padding: 16px 36px; width: 100%; justify-content: center; }
  .btn-large { padding: 18px 40px; }
  .aiph-character-widget { bottom: 20px; right: 20px; }
}

/* ==========================================================================
   8. Floating Art Widget (メインイラスト常時固定＆拡大鑑賞機能)
   ========================================================================== */
.floating-art-widget {
  position: relative;
}

/* --- Floating Trigger Button (左下) --- */
.floating-art-trigger {
  position: fixed;
  bottom: 30px;
  left: 30px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border-color-glow);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 998;
  transition: var(--transition-smooth);
}

.floating-art-icon {
  font-size: 1.5rem;
}

.floating-art-trigger:hover {
  transform: scale(1.08) rotate(-5deg);
  border-color: var(--accent-gold);
}

.floating-art-pulse {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 1.5px solid var(--accent-gold);
  opacity: 0;
  pointer-events: none;
  animation: pulse-avatar 2s infinite ease-out;
}

/* --- Dark Background Overlay --- */
.floating-art-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(13, 15, 20, 0.95);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* --- Expanded Artwork Frame --- */
.floating-art-frame {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  z-index: 1001;
  width: 90%;
  max-width: 720px;
  max-height: 85vh;
  border: 2px solid var(--accent-gold);
  background: #161922;
  padding: 16px;
  border-radius: 16px;
  box-shadow: 
    0 40px 100px rgba(0, 0, 0, 0.8),
    0 0 50px rgba(var(--accent-violet-rgb), 0.15);
  opacity: 0;
  pointer-events: none;
  transition: 
    opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.floating-art-img {
  width: 100%;
  height: auto;
  max-height: calc(85vh - 32px);
  object-fit: contain;
  border-radius: 8px;
  display: block;
}

/* --- Close Button --- */
.floating-art-close-btn {
  position: absolute;
  top: -45px;
  right: 0;
  font-size: 2.5rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.floating-art-close-btn:hover {
  color: var(--accent-gold);
}

/* --- Active Expanded States --- */
.floating-art-widget.expanded .floating-art-overlay {
  opacity: 1;
  pointer-events: auto;
}

.floating-art-widget.expanded .floating-art-frame {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  pointer-events: auto;
}

/* Mobile responsive widget adjustment */
@media (max-width: 768px) {
  .floating-art-trigger {
    bottom: 20px;
    left: 20px;
  }
}