*, *::before, *::after { box-sizing: border-box; }
html { font-size: var(--fs-base); scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font-family); color: var(--color-text);
  background: var(--color-bg); line-height: 1.55;
  padding-bottom: calc(var(--contact-footer-h) + var(--nav-h) + var(--safe-area-bottom));
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }

.app-container { position: relative; min-height: 100vh; }
.bg-canvas {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; opacity: 0.6;
}
.bg-overlay {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse at 50% 0%, transparent 0%, var(--color-bg) 70%);
}
.page-container {
  position: relative; z-index: 2; max-width: 720px; margin: 0 auto;
  padding: calc(var(--nav-h) + 12px) 16px 24px;
}

.app-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(6, 15, 31, 0.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding-top: env(safe-area-inset-top, 0);
}
.app-nav-inner {
  display: flex; align-items: center; gap: 6px; padding: 8px 12px; max-width: 720px; margin: 0 auto;
}
.app-nav-title { font-weight: 700; font-size: 15px; flex: 1; font-family: var(--font-serif); }
.nav-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.nav-tab {
  padding: 6px 10px; border-radius: 8px; border: none; background: transparent;
  color: var(--color-text-secondary); font-size: 12px; cursor: pointer; font-family: inherit;
}
.nav-tab.active, .nav-tab:hover { background: var(--color-bg-card); color: var(--color-text); }

.bottom-nav {
  position: fixed; bottom: var(--contact-footer-h); left: 0; right: 0; z-index: 99;
  display: flex; justify-content: space-around; padding: 8px 12px;
  background: rgba(6, 15, 31, 0.95); border-top: 1px solid var(--color-border);
}
.bottom-nav button {
  flex: 1; padding: 8px; border: none; background: none; color: var(--color-text-secondary);
  font-size: 11px; cursor: pointer; font-family: inherit;
}
.bottom-nav button.active { color: var(--color-accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 16px; border-radius: 10px; border: 1px solid transparent;
  font-size: 14px; cursor: pointer; text-decoration: none; font-family: inherit;
  background: var(--color-bg-card); color: var(--color-text);
}
.btn-primary { background: var(--color-accent); color: #1a1a1a; border-color: var(--color-accent); font-weight: 600; }
.btn-secondary { border-color: var(--color-border); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 24px; font-size: 16px; }
.btn-block { width: 100%; margin-top: 8px; }

.hero { text-align: center; padding: 24px 0 32px; }
.hero-title { font-size: 1.75rem; font-family: var(--font-serif); margin: 0 0 8px; }
.hero-sub { color: var(--color-text-secondary); margin: 0 0 16px; }
.section-title { font-size: var(--fs-h2); margin: 0 0 12px; font-family: var(--font-serif); }
.page-title { font-size: var(--fs-h1); margin: 0 0 8px; font-family: var(--font-serif); }
.page-desc { color: var(--color-text-secondary); margin: 0 0 16px; font-size: 14px; }
.field-hint { font-size: 12px; color: var(--color-text-secondary); }

.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--color-text-secondary); }
.form-field input, .form-field textarea {
  width: 100%; padding: 12px; border-radius: 10px; border: 1px solid var(--color-border);
  background: var(--color-bg-card); color: var(--color-text); font-size: 15px; font-family: inherit;
}
.editor-paper textarea { min-height: 160px; font-family: var(--font-serif); line-height: 1.7; }
.editor-paper[data-paper="night"] textarea { background: #1a1a2e; color: #e8e8f0; }
.editor-paper[data-paper="letter"] textarea { background: #fffef8; color: #333; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 12px; border-radius: 20px; border: 1px solid var(--color-border);
  background: var(--color-bg-card); color: var(--color-text); font-size: 13px; cursor: pointer;
}
.chip.active { border-color: var(--color-accent); background: rgba(212, 168, 67, 0.2); }
.seal-row { display: flex; gap: 10px; }
.seal-dot {
  width: 32px; height: 32px; border-radius: 50%; border: 2px solid transparent; cursor: pointer;
}
.seal-dot.active { border-color: #fff; box-shadow: 0 0 12px var(--color-accent); }

.capsule-list { display: flex; flex-direction: column; gap: 10px; }
.capsule-card {
  display: flex; gap: 12px; align-items: center; padding: 14px;
  border-radius: 14px; border: 1px solid var(--color-border); background: var(--color-bg-card);
  cursor: pointer; transition: transform 0.15s;
}
.capsule-card:hover { transform: translateY(-2px); }
.capsule-card__seal { width: 12px; height: 48px; border-radius: 6px; flex-shrink: 0; }

/* 密封仪式 */
.seal-stage { text-align: center; padding: 20px 0; }
.seal-paper {
  margin: 24px auto; max-width: 280px; padding: 20px; border-radius: 8px;
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  transition: transform 1s ease, opacity 1s;
}
.seal-paper.folding { transform: scaleY(0.3) rotateX(60deg); opacity: 0.5; }
.seal-envelope {
  width: 200px; height: 120px; margin: 24px auto; position: relative;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 8px;
}
.seal-wax {
  width: 48px; height: 48px; border-radius: 50%; margin: -24px auto 0;
  position: relative; top: 50%; transform: translateY(-50%);
  transition: transform 0.6s, box-shadow 0.6s;
}
.seal-wax.drip { animation: waxDrip 1s ease forwards; }
.seal-wax.stamped { transform: translateY(-50%) scale(1.1); box-shadow: 0 0 20px rgba(212,168,67,0.8); }
.seal-envelope.sinking { animation: capsuleSink 1.5s ease forwards; }
.seal-capsule-float { font-size: 48px; animation: waveFloat 2s ease infinite; }
@keyframes waxDrip { 0% { transform: translateY(-50%) scale(0.3); } 100% { transform: translateY(-50%) scale(1); } }
@keyframes capsuleSink { to { transform: translateY(80px); opacity: 0; } }
@keyframes waveFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

/* 倒计时 */
.countdown-page { text-align: center; }
.flip-row { display: flex; justify-content: center; gap: 8px; margin: 20px 0; }
.flip-unit {
  background: var(--color-bg-card); border-radius: 10px; padding: 12px 10px; min-width: 64px;
  border: 1px solid var(--color-border);
}
.flip-val { display: block; font-size: 28px; font-weight: 700; font-variant-numeric: tabular-nums; }
.flip-label { font-size: 11px; color: var(--color-text-secondary); }
.progress-ring-wrap { position: relative; width: 120px; height: 120px; margin: 16px auto; }
.progress-ring { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring-bg { fill: none; stroke: rgba(255,255,255,0.1); stroke-width: 8; }
.ring-fg { fill: none; stroke: var(--color-accent); stroke-width: 8; stroke-linecap: round; transition: stroke-dashoffset 0.5s; }
.ring-text { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.countdown-bg-canvas { width: 100%; height: 120px; border-radius: 12px; margin-top: 12px; }

/* 揭晓 */
.reveal-envelope {
  width: 220px; height: 140px; margin: 40px auto; position: relative;
  background: linear-gradient(160deg, var(--color-primary), var(--color-accent));
  border-radius: 10px; transition: transform 1.2s ease;
}
.reveal-envelope.rise { animation: envelopeRise 1.2s ease; }
.reveal-envelope.open { transform: scale(1.05); opacity: 0; }
@keyframes envelopeRise { from { transform: translateY(60px); opacity: 0; } to { transform: none; opacity: 1; } }
.reveal-paper {
  padding: 20px; border-radius: 12px; background: var(--color-bg-card);
  border: 1px solid var(--color-border); margin: 16px 0; font-family: var(--font-serif);
  line-height: 1.8;
}
.reveal-text { min-height: 80px; }
.dual-compare { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 16px; }
.dual-col { padding: 10px; border-radius: 8px; background: var(--color-bg-card); font-size: 12px; text-align: center; }
.reveal-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.particle {
  position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--color-accent);
  animation: particleBurst 1.2s ease forwards; pointer-events: none;
}
@keyframes particleBurst {
  to { transform: translate(var(--px), var(--py)) scale(0); opacity: 0; }
}
.pwd-input { width: 100%; padding: 14px; border-radius: 10px; border: 1px solid var(--color-border); margin-bottom: 12px; }

/* 时间海 */
.wall-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.wall-card {
  padding: 14px; border-radius: 14px; background: var(--color-bg-card); border: 1px solid var(--color-border);
  cursor: pointer; transition: transform 0.15s;
}
.wall-card:hover { transform: translateY(-2px); }
.wall-card.locked { opacity: 0.85; }
.wall-card__seal { width: 100%; height: 4px; border-radius: 2px; margin-bottom: 8px; }
.wall-card h3 { font-size: 14px; margin: 0 0 6px; }
.wall-card__preview { font-size: 12px; color: var(--color-text-secondary); margin: 0; }

.kpi-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.kpi {
  padding: 16px; border-radius: 12px; background: var(--color-bg-card); border: 1px solid var(--color-border);
  text-align: center;
}
.kpi strong { display: block; font-size: 22px; color: var(--color-accent); }

.share-card-img { border-radius: 12px; margin: 16px auto; max-width: 280px; }

body.share-page {
  padding-bottom: calc(var(--contact-footer-h) + 16px + var(--safe-area-bottom));
}
.share-main { max-width: 420px; margin: 0 auto; padding: 24px 16px; }
.share-card {
  padding: 28px 20px; border-radius: var(--radius-lg);
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  text-align: center;
}
.share-icon { font-size: 52px; margin-bottom: 8px; }
.share-card h1 { font-size: var(--fs-h1); margin: 0 0 8px; }
.share-slogan { color: var(--color-accent); font-weight: 600; margin: 0 0 16px; font-size: 14px; }
.share-list { text-align: left; padding-left: 20px; margin: 12px 0 16px; font-size: 13px; line-height: 1.7; }
.share-list li { margin-bottom: 4px; }
.share-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 16px 0; }
.share-stat {
  padding: 12px 8px; border-radius: 10px; background: rgba(0,0,0,.2);
  border: 1px solid var(--color-border);
}
.share-stat strong { display: block; font-size: 18px; color: var(--color-accent); }
.share-stat span { font-size: 11px; color: var(--color-text-secondary); }
.share-qr-wrap { text-align: center; margin: 16px 0 8px; }
.share-qr-img {
  display: block; margin: 0 auto; border: 1px solid var(--color-border);
  border-radius: 8px; background: #fff;
}
.share-qr-hint { font-size: 12px; color: var(--color-text-secondary); margin: 8px 0 0; }
.share-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.share-actions .btn { width: 100%; }
.share-demo {
  margin-top: 16px; padding: 12px; border-radius: 10px;
  background: rgba(212, 168, 67, 0.12); border: 1px solid rgba(212, 168, 67, 0.35);
  font-size: 13px; text-align: left;
}
.share-demo strong { color: var(--color-accent); }

.contact-footer {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 98;
  padding: 8px 12px calc(8px + var(--safe-area-bottom));
  background: rgba(6, 15, 31, 0.96); border-top: 1px solid var(--color-border);
}
.contact-footer__btns { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.contact-footer__cta, .contact-footer__btn {
  padding: 8px 14px; border-radius: 8px; font-size: 13px; text-decoration: none;
  border: 1px solid var(--color-border); background: var(--color-bg-card); color: var(--color-text); cursor: pointer;
}
.contact-footer__cta { background: var(--color-accent); color: #1a1a1a; border-color: var(--color-accent); font-weight: 600; }
.contact-footer__brand { text-align: center; font-size: 11px; color: var(--color-text-secondary); margin: 6px 0 0; }

.r162-toast {
  position: fixed; left: 50%; bottom: calc(var(--contact-footer-h) + var(--nav-h) + 24px);
  transform: translateX(-50%); background: rgba(0,0,0,.88); color: #fff;
  padding: 10px 18px; border-radius: 8px; z-index: 9999; opacity: 0; transition: opacity .2s;
  max-width: 90%;
}
.r162-toast.show { opacity: 1; }

.animate-in { animation: fadeUp .5s ease both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

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

/* 多媒体 */
.media-toolbar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.media-toolbar label.btn { cursor: pointer; }
.media-preview-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.media-thumb {
  position: relative; width: 72px; height: 72px; border-radius: 10px;
  border: 1px solid var(--color-border); background: var(--color-bg-card);
  overflow: hidden; display: flex; align-items: center; justify-content: center; font-size: 12px;
}
.media-thumb img { width: 100%; height: 100%; object-fit: cover; }
.media-remove {
  position: absolute; top: 2px; right: 2px; width: 22px; height: 22px;
  border: none; border-radius: 50%; background: rgba(0,0,0,.6); color: #fff; cursor: pointer; font-size: 14px;
}
.reveal-attachments { margin: 20px 0; }
.attach-img { border-radius: 12px; margin-bottom: 12px; max-height: 240px; object-fit: cover; }
.attach-audio, .attach-video { width: 100%; margin-bottom: 12px; border-radius: 10px; }
.attach-video { max-height: 280px; background: #000; }

/* 云端同步 */
.cloud-sync-card {
  padding: 16px; border-radius: 14px; border: 1px solid var(--color-border); background: var(--color-bg-card);
}
.cloud-sync-status { font-size: 14px; margin: 0 0 8px; font-weight: 600; }
.cloud-sync-card input[readonly], .cloud-sync-card textarea {
  width: 100%; padding: 10px; border-radius: 8px; border: 1px solid var(--color-border);
  font-size: 13px; font-family: inherit; background: var(--color-bg); color: var(--color-text);
}
.boot-error { padding: 24px 0; text-align: center; }
.boot-error .btn { margin: 8px 4px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }