/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-ink:       oklch(0.97 0.005 260);
  --color-ink-dim:   oklch(0.65 0.010 260);
  --color-ink-muted: oklch(0.45 0.015 260);
  --color-surface:   oklch(0.08 0.005 260);
  --color-surface2:  oklch(0.12 0.008 260);
  --color-surface3:  oklch(0.16 0.010 260);
  --color-surface4:  oklch(0.20 0.012 260);
  --color-border:    oklch(0.22 0.015 260);
  --color-accent:    oklch(0.60 0.160 280);
  --color-accent-dim: oklch(0.45 0.100 280);
  --color-glow:      oklch(0.70 0.120 280);
  --color-gold:      oklch(0.68 0.120 80);
  --color-gold-dim:  oklch(0.50 0.080 80);
  --color-star:      oklch(0.95 0 0);

  --font-display: 'Noto Serif SC', 'EB Garamond', Georgia, 'Times New Roman', serif;
  --font-body: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-num: 'EB Garamond', Georgia, serif;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 8rem;

  --max-width: 720px;
  --transition-slow: 800ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-med: 500ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 250ms ease-out;

  --z-canvas: 0;
  --z-content: 1;
  --z-overlay: 10;
  --z-modal: 20;
}

html {
  scroll-behavior: smooth;
  background-color: var(--color-surface);
  color: var(--color-ink);
}

body {
  font-family: var(--font-body);
  font-size: clamp(0.875rem, 0.85rem + 0.2vw, 1rem);
  line-height: 1.75;
  background-color: var(--color-surface);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ===== STARFIELD CANVAS ===== */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: var(--z-canvas);
  pointer-events: none;
}

/* ===== SECTIONS ===== */
.section {
  position: relative;
  z-index: var(--z-content);
  padding: var(--space-2xl) var(--space-lg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.section.fullscreen {
  min-height: 100vh;
  padding: 0;
}

.section-content {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  opacity: 0.8;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 1.5rem + 1.2vw, 2.5rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-lg);
  text-wrap: balance;
}

/* ===== SECTION 1: OATH ===== */
#oath {
  flex-direction: column;
  text-align: center;
  padding: var(--space-xl) var(--space-lg) 5rem;
}

.oath-container {
  max-width: 600px;
}

.oath-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
  opacity: 0;
  animation: fadeIn 1.5s ease-out 0.5s forwards;
}

.oath-brandmark {
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 2rem + 2.5vw, 4.5rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-ink);
  line-height: 1;
  text-shadow: 0 0 60px oklch(0.60 0.160 280 / 0.15);
}

.oath-seal {
  width: 44px;
  height: 44px;
  border: 1.5px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transform: rotate(2deg);
}

.oath-text {
  opacity: 0;
  animation: fadeIn 2s ease-out 1s forwards;
}

.oath-line {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 1rem + 1vw, 1.75rem);
  line-height: 2;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.oath-line.visible {
  opacity: 1;
  transform: translateY(0);
}

.oath-spacer {
  height: 0.5rem;
  opacity: 0;
  animation: fadeIn 0.5s ease-out forwards;
}

.oath-brand {
  margin-top: var(--space-lg);
  font-size: clamp(0.875rem, 0.8rem + 0.3vw, 1rem);
  color: var(--color-gold);
  letter-spacing: 0.2em;
}

.scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-ink-dim);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  opacity: 0;
  animation: fadeIn 1s ease-out 6s forwards;
}

.scroll-arrow {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-ink-dim), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== SECTION 2: ANCIENT STORY ===== */
#story {
  background: linear-gradient(180deg, transparent 0%, var(--color-surface2) 30%, var(--color-surface2) 70%, transparent 100%);
}

.story-intro h2 {
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
}

.story-stele {
  background: var(--color-surface3);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  position: relative;
}

.stele-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.stele-seal {
  font-family: var(--font-display);
  font-size: 0.875rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.stele-era {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--color-ink-dim);
}

.stele-inscription p {
  margin-bottom: var(--space-md);
  color: var(--color-ink-dim);
}

.ancient-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  line-height: 1.6;
  color: var(--color-gold);
  text-align: center;
  padding: var(--space-lg) 0;
  margin: var(--space-md) 0;
  font-style: normal;
}

.quote-mark {
  color: var(--color-gold-dim);
  font-size: 0.7em;
  vertical-align: middle;
}

.story-bridge {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.bridge-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold-dim), transparent);
}

.bridge-text {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-gold);
  white-space: nowrap;
  letter-spacing: 0.1em;
}

.story-meaning {
  text-align: center;
}

.story-meaning p {
  margin-bottom: var(--space-md);
  color: var(--color-ink-dim);
  line-height: 2;
}

.meaning-core {
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.15rem);
  color: var(--color-ink) !important;
  margin-top: var(--space-lg) !important;
}

.meaning-more {
  color: var(--color-gold-dim);
  font-size: 0.9rem;
  margin-top: var(--space-sm);
}

/* ===== SECTION 3: ABOUT ===== */
#about {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.about-summary {
  color: var(--color-ink-dim);
  line-height: 2;
  margin-bottom: var(--space-xl);
}

/* Tier Cards */
.tiers {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.tier-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  position: relative;
  transition: border-color var(--transition-med), transform var(--transition-med);
}

.tier-card:hover {
  border-color: var(--color-surface4);
  transform: translateY(-2px);
}

.tier-active {
  border-color: var(--color-accent-dim);
}

.tier-active:hover {
  border-color: var(--color-accent);
}

.tier-locked {
  opacity: 0.5;
  cursor: default;
}

.tier-lock-badge {
  position: absolute;
  top: -1px;
  right: -1px;
  background: var(--color-surface4);
  color: var(--color-ink-dim);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 0.35rem 0.75rem;
}

.tier-number {
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-sm);
}

.tier-name {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.9rem + 0.3vw, 1.15rem);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.tier-desc {
  font-size: 0.8rem;
  color: var(--color-ink-dim);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.tier-price {
  font-family: var(--font-num);
  font-size: 1.1rem;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.tier-cta {
  display: block;
  width: 100%;
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-ink);
  text-decoration: none;
  background: var(--color-accent-dim);
  border: 1px solid var(--color-accent-dim);
  padding: 0.7rem 1.25rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
}

.tier-cta:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.tier-cta-disabled {
  background: transparent;
  color: var(--color-ink-muted);
  border-color: var(--color-border);
  cursor: default;
  opacity: 0.6;
}

.tier-cta-disabled:hover {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-ink-muted);
}

.numbering-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-ink-dim);
  line-height: 1.8;
}

.note-icon {
  color: var(--color-accent);
  margin-right: var(--space-xs);
}

.current-number {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  font-family: var(--font-num);
  letter-spacing: 0.05em;
}

/* ===== SECTION 4: MESSAGES WALL ===== */
#messages {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.messages-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-md);
}

.msg-tab {
  background: none;
  border: none;
  color: var(--color-ink-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0.4rem 1rem;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  position: relative;
}

.msg-tab::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: all var(--transition-med);
  transform: translateX(-50%);
}

.msg-tab:hover {
  color: var(--color-ink-dim);
}

.msg-tab.active {
  color: var(--color-accent);
}

.msg-tab.active::after {
  width: 60%;
}

.messages-grid {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.messages-grid.active {
  display: grid;
}

.msg-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}

.msg-card:hover {
  border-color: var(--color-surface4);
}

.msg-body {
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--color-ink-dim);
  margin-bottom: var(--space-md);
  flex: 1;
}

.msg-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

.msg-author {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

.msg-date {
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  font-family: var(--font-num);
}

.messages-cta {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-ink-dim);
  line-height: 2;
  margin-top: var(--space-lg);
}

.msg-write-link {
  display: inline-block;
  margin-top: var(--space-sm);
  color: var(--color-accent);
  text-decoration: none;
  font-size: 1rem;
  transition: color var(--transition-fast);
}

.msg-write-link:hover {
  color: var(--color-glow);
}

/* ===== L0 MODE TABS ===== */
.l0-mode-tabs {
  display: flex;
  gap: 0;
  margin: var(--space-lg) auto var(--space-lg);
  max-width: 400px;
  border: 1px solid var(--color-border);
}

.l0-mode-tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--color-ink-muted);
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.l0-mode-tab:first-child {
  border-right: 1px solid var(--color-border);
}

.l0-mode-tab:hover {
  color: var(--color-ink-dim);
  background: var(--color-surface3);
}

.l0-mode-tab.active {
  color: var(--color-accent);
  background: var(--color-surface3);
}

.l0-mode-content {
  display: none;
}

.l0-mode-content.active {
  display: block;
  animation: fadeSlideUp 0.4s ease-out;
}

/* ===== TIME CAPSULE ===== */
.capsule-intro {
  text-align: center;
  color: var(--color-ink-dim);
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
}

.capsule-form {
  max-width: 520px;
  margin: 0 auto var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
}

.capsule-form-row {
  margin-bottom: var(--space-md);
}

.capsule-duration {
  margin-bottom: var(--space-lg);
}

.capsule-label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-ink-dim);
  margin-bottom: var(--space-sm);
}

.duration-options {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-sm);
}

.duration-btn {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-md);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
}

.duration-btn:hover {
  border-color: var(--color-accent-dim);
}

.duration-btn.active {
  border-color: var(--color-accent);
  background: var(--color-surface2);
}

.duration-icon {
  font-size: 1.25rem;
  display: block;
  margin-bottom: var(--space-xs);
}

.duration-name {
  display: block;
  font-size: 0.85rem;
  color: var(--color-ink);
  margin-bottom: 0.15rem;
}

.duration-desc {
  display: block;
  font-size: 0.7rem;
  color: var(--color-ink-muted);
}

.btn-seal {
  width: 100%;
  padding: 0.9rem;
  font-size: 1rem;
}

/* Capsule Success */
.capsule-success {
  text-align: center;
  padding: var(--space-lg);
  animation: fadeSlideUp 0.6s ease-out;
}

.capsule-seal-anim {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  animation: sealStamp 0.8s ease-out;
}

.capsule-success p {
  color: var(--color-ink-dim);
  margin-bottom: var(--space-sm);
}

.capsule-success-id {
  font-family: var(--font-num);
  font-size: 1.1rem;
  color: var(--color-accent) !important;
}

.capsule-success-date {
  font-size: 0.85rem;
  color: var(--color-ink-muted) !important;
}

@keyframes sealStamp {
  0% { transform: scale(0) rotate(-20deg); opacity: 0; }
  60% { transform: scale(1.3) rotate(5deg); opacity: 1; }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* My Capsules */
.my-capsules {
  max-width: 520px;
  margin: 0 auto;
}

.capsule-section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  text-align: center;
}

.capsule-empty {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  color: var(--color-ink-dim);
}

.capsule-empty-hint {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  margin-top: var(--space-sm);
}

.capsule-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.capsule-item {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.capsule-item:hover {
  border-color: var(--color-accent-dim);
}

.capsule-item-left {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.capsule-item-icon {
  font-size: 1.25rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.capsule-item-icon.unlocked {
  border-color: var(--color-gold-dim);
  background: var(--color-surface2);
}

.capsule-item-info h4 {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.capsule-item-info p {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

.capsule-item-status {
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  letter-spacing: 0.05em;
}

.capsule-item-status.sealed {
  color: var(--color-ink-muted);
  border: 1px solid var(--color-border);
}

.capsule-item-status.unlocked {
  color: var(--color-gold);
  border: 1px solid var(--color-gold-dim);
}

/* Capsule Detail Modal */
.capsule-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  background: oklch(0 0 0 / 0.7);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.capsule-modal.active {
  display: flex;
  animation: fadeIn 0.3s ease-out;
}

.capsule-modal-content {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  max-width: 480px;
  width: 100%;
  padding: var(--space-xl) var(--space-lg);
  position: relative;
  animation: fadeSlideUp 0.4s ease-out;
  max-height: 80vh;
  overflow-y: auto;
}

.capsule-modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--color-ink-muted);
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

.capsule-modal-close:hover {
  color: var(--color-ink);
}

.capsule-modal-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.capsule-modal-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.capsule-modal-icon.sealed {
  animation: capsulePulse 2s ease-in-out infinite;
}

@keyframes capsulePulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.05); opacity: 1; }
}

.capsule-modal-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.capsule-modal-sub {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

.capsule-modal-body {
  font-size: 0.95rem;
  line-height: 2;
  color: var(--color-ink-dim);
  white-space: pre-wrap;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-top: var(--space-md);
}

.capsule-modal-countdown {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-ink-muted);
}

.capsule-countdown-num {
  font-family: var(--font-num);
  font-size: 2rem;
  color: var(--color-accent);
  display: block;
  margin: var(--space-sm) 0;
}

.capsule-loading {
  text-align: center;
  color: var(--color-ink-muted);
  padding: var(--space-lg);
}

/* L0 Form */
.l0-form {
  max-width: 520px;
  margin: var(--space-lg) auto 0;
  padding: var(--space-lg);
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
}

.l0-form-row {
  margin-bottom: var(--space-md);
}

.l0-input,
.l0-textarea {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.l0-input:focus,
.l0-textarea:focus {
  border-color: var(--color-accent-dim);
}

.l0-textarea {
  resize: vertical;
  line-height: 1.8;
}

.l0-counter {
  text-align: right;
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  margin-top: 0.25rem;
}

.l0-guidelines {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.l0-success {
  text-align: center;
  color: var(--color-gold);
  font-size: 0.9rem;
  padding: var(--space-md);
  margin-top: var(--space-md);
  border: 1px solid var(--color-gold-dim);
}

/* Message Guidelines */
.message-guidelines {
  background: var(--color-surface3);
  border: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  font-size: 0.85rem;
  line-height: 1.8;
}

.message-guidelines p {
  margin-bottom: var(--space-xs);
}

.guideline-muted {
  color: var(--color-ink-muted);
  font-size: 0.8rem;
}

/* ===== SECTION 5: REGISTRATION ===== */
#register {
  background: linear-gradient(180deg, transparent 0%, var(--color-surface2) 30%, var(--color-surface2) 70%, transparent 100%);
}

.registration-flow {
  max-width: 480px;
  margin: 0 auto;
}

.reg-step {
  display: none;
  animation: fadeSlideUp 0.6s ease-out;
}

.reg-step.active {
  display: block;
}

.step-indicator {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.reg-step h3 {
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 1rem + 0.3vw, 1.35rem);
  margin-bottom: var(--space-sm);
}

.step-desc {
  color: var(--color-ink-dim);
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
}

/* Number Display */
.number-display {
  font-family: var(--font-num);
  font-size: clamp(2rem, 1.8rem + 1.5vw, 3rem);
  text-align: center;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  padding: var(--space-lg) 0;
  text-shadow: 0 0 40px oklch(0.60 0.160 280 / 0.3);
}

.step-hint {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-lg);
}

/* Form */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--color-ink-dim);
  margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent-dim);
}

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23666666' fill='none' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  cursor: pointer;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-ink-muted);
}

.form-actions {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.form-actions .btn {
  flex: 1;
}

/* Verification code row */
.code-row {
  display: flex;
  gap: 12px;
}
.code-row .code-input {
  flex: 1;
}
.btn-code {
  flex-shrink: 0;
  padding: 0 20px;
  height: 44px;
  line-height: 44px;
  font-size: 0.85rem;
  background: var(--color-surface-3);
  color: var(--color-gold);
  border: 1px solid var(--color-gold-dim);
  border-radius: 8px;
  white-space: nowrap;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}
.btn-code:disabled {
  opacity: 0.4;
  color: var(--color-ink-muted);
  border-color: var(--color-border);
  cursor: default;
}
#codeField {
  margin-top: -12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent-dim);
  color: var(--color-ink);
  border-color: var(--color-accent-dim);
}

.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-primary:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink-dim);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  color: var(--color-ink);
  border-color: var(--color-ink-dim);
}

.btn-small {
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
}

.btn-pay {
  background: var(--color-gold-dim);
  border-color: var(--color-gold-dim);
  color: var(--color-ink);
}

.btn-pay:hover {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-surface);
}

/* Photo Upload */
.photo-upload {
  border: 1px dashed var(--color-border);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast);
  margin-bottom: var(--space-lg);
}

.photo-upload:hover {
  border-color: var(--color-accent-dim);
}

.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-ink-dim);
  font-size: 0.9rem;
}

.upload-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
}

.upload-hint {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

.photo-preview {
  text-align: center;
}

.photo-preview img {
  max-width: 200px;
  max-height: 200px;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
}

/* Message Area */
.message-area {
  margin-bottom: var(--space-lg);
}

.message-area textarea {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 0.9rem;
  padding: 1rem;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-fast);
  line-height: 1.8;
}

.message-area textarea:focus {
  border-color: var(--color-accent-dim);
}

.message-counter {
  text-align: right;
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  margin-top: var(--space-xs);
}

/* Review Card */
.review-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  line-height: 2;
  font-size: 0.9rem;
}

.review-card strong {
  color: var(--color-ink);
}

.review-message {
  color: var(--color-ink-dim);
  font-size: 0.85rem;
}

/* Pricing Options */
.pricing-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.price-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.price-option:hover {
  border-color: var(--color-accent-dim);
}

.price-option.selected {
  border-color: var(--color-accent);
}

.price-radio {
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  flex-shrink: 0;
  position: relative;
  transition: border-color var(--transition-fast);
}

.price-option.selected .price-radio {
  border-color: var(--color-accent);
}

.price-option.selected .price-radio::after {
  content: '';
  position: absolute;
  inset: 3px;
  background: var(--color-accent);
  border-radius: 50%;
}

.price-info {
  flex: 1;
}

.price-label {
  font-size: 0.9rem;
  margin-bottom: 0.15rem;
}

.price-value {
  font-family: var(--font-num);
  font-size: 1.25rem;
  color: var(--color-gold);
}

.price-hint {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

/* Success State */
.registration-success {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
  animation: fadeSlideUp 0.8s ease-out;
}

.success-seal {
  width: 80px;
  height: 80px;
  border: 2px solid var(--color-gold);
  color: var(--color-gold);
  font-family: var(--font-num);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  animation: sealAppear 1s ease-out forwards;
}

.success-number {
  font-family: var(--font-num);
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.success-text {
  color: var(--color-ink-dim);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.success-text.small {
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  margin-top: var(--space-lg);
}

/* Title Badges */
.title-badges {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin: 12px 0;
}
.title-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-family: var(--font-serif);
  letter-spacing: 0.05em;
  background: rgba(212, 175, 55, 0.12);
  color: var(--color-gold);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

/* ===== FOOTER ===== */
#footer {
  position: relative;
  z-index: var(--z-content);
  padding: var(--space-xl) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-brand {
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.footer-logo {
  font-family: var(--font-num);
  font-size: 1.25rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.footer-tagline {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-ink-dim);
}

.footer-trust {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.footer-meta {
  font-size: 0.7rem;
  color: var(--color-ink-muted);
}

.footer-contact {
  margin-top: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-ink-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.footer-contact a {
  color: var(--color-ink-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.footer-contact a:hover {
  color: var(--color-accent);
}
.footer-qrcode {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  vertical-align: middle;
  cursor: pointer;
  transition: transform var(--transition-fast);
}
.footer-qrcode:hover {
  transform: scale(3);
  z-index: 100;
  position: relative;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.footer-icp {
  margin-top: var(--space-md);
  font-size: 0.7rem;
}

.footer-icp a {
  color: var(--color-ink-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-icp a:hover {
  color: var(--color-accent);
}

.footer-sep {
  margin: 0 var(--space-sm);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  to { opacity: 1; }
}

@keyframes fadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sealAppear {
  0% { opacity: 0; transform: rotate(-10deg) scale(0.8); }
  100% { opacity: 1; transform: rotate(-3deg) scale(1); }
}

/* ===== PAYPAL ===== */
.paypal-section {
  max-width: 480px;
  margin: 0 auto;
  padding: var(--space-xl) 0;
  text-align: center;
}

.paypal-section h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
  color: var(--color-ink);
}

.paypal-section .step-desc {
  color: var(--color-ink-dim);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
}

.paypal-button-container {
  margin: var(--space-lg) auto;
  max-width: 300px;
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .oath-line {
    opacity: 0;
    transform: none;
  }

  .oath-line.visible {
    opacity: 1;
  }

  #starfield {
    opacity: 0.5;
  }

  html {
    scroll-behavior: auto;
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .section {
    padding: var(--space-xl) var(--space-md);
  }

  .tiers {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

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

  .stele-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .story-bridge {
    flex-direction: column;
  }

  .bridge-text {
    white-space: normal;
    text-align: center;
  }

  .form-actions {
    flex-direction: column;
  }

  .footer-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
  }

  .footer-sep {
    display: none;
  }

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

/* ============================================================
   ARTICLES
   ============================================================ */
/* Category Tab Cards */
.article-category-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.article-cat-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: var(--space-lg) var(--space-sm);
  background: var(--color-surface2);
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.article-cat-tab::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: transparent;
  transition: background 0.35s ease;
}

.article-cat-tab:hover {
  border-color: var(--color-accent-dim);
  background: var(--color-surface3);
  transform: translateY(-2px);
}

.article-cat-tab.active {
  border-color: var(--color-gold);
  background: var(--color-surface3);
  box-shadow: 0 0 24px rgba(196, 163, 90, 0.08);
}

.article-cat-tab.active::before {
  background: var(--color-gold);
}

.article-cat-tab .cat-icon {
  font-size: 1.6rem;
  line-height: 1;
}

.article-cat-tab .cat-label {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-ink-dim);
  transition: color 0.3s ease;
}

.article-cat-tab.active .cat-label {
  color: var(--color-gold);
}

.article-cat-tab .cat-desc {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  text-align: center;
  line-height: 1.4;
}

/* Article List */
.article-list-web {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.article-card-web {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--space-lg);
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-border);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.article-card-web::after {
  content: '→';
  position: absolute;
  right: var(--space-lg);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  color: var(--color-ink-muted);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.article-card-web:hover {
  border-color: var(--color-accent-dim);
  background: var(--color-surface3);
  padding-right: calc(var(--space-lg) + 32px);
}

.article-card-web:hover::after {
  opacity: 1;
  transform: translateY(-50%) translateX(4px);
}

.article-card-web .card-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-card-web .card-badge {
  font-size: 0.7rem;
  padding: 2px 10px;
  border: 1px solid var(--color-accent-dim);
  color: var(--color-accent);
  white-space: nowrap;
}

.article-card-web .card-date {
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

.article-card-web h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
  transition: color 0.3s ease;
}

.article-card-web:hover h3 {
  color: var(--color-gold);
}

.article-card-web .card-excerpt {
  font-size: 0.85rem;
  color: var(--color-ink-dim);
  line-height: 1.7;
}

/* Category accent colors */
.article-card-web[data-category="前沿研究"] {
  border-left-color: #7c6fdc;
}
.article-card-web[data-category="灵异事件簿"] {
  border-left-color: #c45a6f;
}
.article-card-web[data-category="人间故事"] {
  border-left-color: #c4a35a;
}

/* Article Modal */
.article-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(4, 6, 14, 0.88);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  animation: fadeIn 0.25s ease;
}

.article-modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 720px;
  max-height: 88vh;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  z-index: 1001;
  overflow-y: auto;
  animation: modalSlideIn 0.3s ease;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.article-modal-content {
  padding: var(--space-xl);
  position: relative;
}

.article-modal-close {
  position: sticky;
  float: right;
  top: 0;
  z-index: 2;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface3);
  border: 1px solid var(--color-border);
  color: var(--color-ink-dim);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.25s ease;
  margin: 0 0 var(--space-md) var(--space-md);
}

.article-modal-close:hover {
  border-color: var(--color-ink-dim);
  color: var(--color-ink);
  background: var(--color-surface4);
}

.article-modal-header {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.article-modal-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.article-modal-category {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  padding: 3px 12px;
  border: 1px solid var(--color-gold-dim);
}

.article-modal-date {
  font-size: 0.8rem;
  color: var(--color-ink-muted);
}

.article-modal-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  line-height: 1.4;
  padding-right: 48px;
}

.article-modal-body {
  font-size: 0.95rem;
  line-height: 2.1;
  color: var(--color-ink-dim);
  white-space: pre-wrap;
}

.article-modal-footer {
  text-align: center;
  padding-top: var(--space-lg);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  opacity: 0.4;
  letter-spacing: 0.1em;
}

/* Scrollbar for modal */
.article-modal::-webkit-scrollbar {
  width: 4px;
}
.article-modal::-webkit-scrollbar-track {
  background: transparent;
}
.article-modal::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
}

/* Responsive */
@media (max-width: 640px) {
  .article-category-tabs {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .article-cat-tab {
    flex-direction: row;
    padding: var(--space-md);
    gap: 12px;
  }

  .article-cat-tab .cat-icon {
    font-size: 1.3rem;
  }

  .article-cat-tab .cat-desc {
    display: none;
  }

  .article-modal {
    width: 96%;
    max-height: 92vh;
    top: 4%;
    left: 2%;
    transform: none;
  }

  .article-modal-content {
    padding: var(--space-lg);
  }

  .article-modal-title {
    font-size: 1.2rem;
    padding-right: 0;
  }

  .article-card-web::after {
    display: none;
  }

  .article-card-web:hover {
    padding-right: var(--space-lg);
  }
}