* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Nunito', ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, 'Helvetica Neue', Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: #e2e8f0;
  background: radial-gradient(1200px 800px at 80% -10%, rgba(59,130,246,0.25), transparent 60%),
              radial-gradient(1000px 700px at -10% 20%, rgba(236,72,153,0.25), transparent 60%),
              #0b1220;
}
body.theme-light {
  color: #0f172a;
  background: radial-gradient(1200px 800px at 80% -10%, rgba(59,130,246,0.15), transparent 60%),
              radial-gradient(1000px 700px at -10% 20%, rgba(236,72,153,0.15), transparent 60%),
              #f8fafc;
}

#app { display: flex; flex-direction: column; min-height: 100%; }
.site-header, .site-footer { width: 100%; max-width: 1100px; margin: 0 auto; padding: 16px 20px; }
.site-header { display: flex; align-items: center; justify-content: space-between; }
.site-header h1 { margin: 0; font-size: 22px; letter-spacing: 2px; font-weight: 800; }
.site-header nav { display: flex; gap: 8px; }
.nav-btn { background: transparent; color: #cbd5e1; border: 1px solid rgba(148,163,184,0.3); padding: 8px 14px; border-radius: 12px; cursor: pointer; backdrop-filter: blur(6px); transition: transform .2s ease, border-color .2s ease, background .2s ease; }
.nav-btn:hover { color: #fff; border-color: rgba(255,255,255,0.5); }
body.theme-light .nav-btn { color: #334155; }
body.theme-light .nav-btn:hover { color: #0f172a; border-color: rgba(2,6,23,0.2); }

main { width: 100%; max-width: 1100px; margin: 0 auto; padding: 10px 20px 40px; flex: 1; }
.view { display: none; opacity: 0; transform: translateY(6px); transition: opacity .25s ease, transform .25s ease; }
.view.active { display: block; opacity: 1; transform: translateY(0); }
.hero { margin: 40px 0 20px; }
.hero h2 { margin: 0 0 6px; font-size: 28px; }
.sub { color: #94a3b8; margin: 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; margin-top: 24px; }
.card { position: relative; padding: 20px; border-radius: 16px; background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03)); border: 1px solid rgba(148,163,184,0.25); cursor: pointer; transition: transform .25s ease, border-color .2s ease, box-shadow .25s ease; }
.card:hover { transform: translateY(-2px); border-color: rgba(255,255,255,0.45); }
body.theme-light .card { background: #ffffffcc; border-color: rgba(2,6,23,0.08); }
body.theme-light .card:hover { border-color: rgba(2,6,23,0.25); box-shadow: 0 6px 20px rgba(2,6,23,0.12); }
.card-title { font-size: 24px; font-weight: 800; }
.card-desc { color: #a8b2c1; margin-top: 4px; }

.glass { background: rgba(15,23,42,0.55); border: 1px solid rgba(148,163,184,0.25); border-radius: 16px; padding: 16px; backdrop-filter: blur(10px); box-shadow: 0 10px 30px rgba(0,0,0,0.25); transition: background .25s ease, border-color .25s ease, box-shadow .25s ease; }
body.theme-light .glass { background: rgba(255,255,255,0.75); border-color: rgba(2,6,23,0.08); box-shadow: 0 10px 30px rgba(2,6,23,0.08); }
.form-row { display: grid; gap: 6px; margin: 12px 0; }
label { font-size: 14px; color: #cbd5e1; }
input[type="text"], textarea, input[type="file"] { width: 100%; background: rgba(2,6,23,0.5); color: #e2e8f0; border: 1px solid rgba(148,163,184,0.25); border-radius: 12px; padding: 10px 12px; }
textarea { resize: vertical; }

.actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.primary { background: linear-gradient(90deg, #60a5fa, #f472b6); color: #0b1220; border: none; padding: 10px 16px; border-radius: 12px; font-weight: 800; cursor: pointer; }
.secondary { background: transparent; color: #e2e8f0; border: 1px solid rgba(148,163,184,0.35); padding: 10px 16px; border-radius: 12px; cursor: pointer; }
.link { background: transparent; color: #93c5fd; border: none; padding: 10px 0; cursor: pointer; }

.result.hidden { display: none; }
.pickup-code { font-size: 28px; letter-spacing: 2px; padding: 8px 0; font-weight: 800; }
.tip { color: #94a3b8; }

.postcard { margin-top: 20px; display: grid; gap: 12px; }
.postcard.hidden { display: none; }
.postcard-media { width: 100%; overflow: hidden; border-radius: 16px; border: 1px solid rgba(148,163,184,0.25); background: rgba(15,23,42,0.4); display: flex; align-items: center; justify-content: center; min-height: 160px; }
.postcard-media img { max-width: 100%; max-height: 60vh; display: block; }
.postcard-body { padding: 16px; }
.postcard-tofrom { color: #cbd5e1; font-size: 14px; margin-bottom: 8px; }
.postcard-message { white-space: pre-wrap; font-size: 16px; line-height: 1.6; }
.postcard-meta { color: #94a3b8; font-size: 12px; margin-top: 8px; }

.site-footer { color: #94a3b8; }

@media (max-width: 640px) {
  .hero h2 { font-size: 22px; }
  .card-title { font-size: 20px; }
}

/* 寄语跑马灯 */
.ticker { margin-top: 24px; overflow: hidden; border-radius: 16px; }
.ticker-rows { display: grid; grid-template-rows: repeat(5, 1fr); gap: 8px; padding: 12px; }
.ticker-row { position: relative; overflow: hidden; height: 52px; }
.ticker-track { position: absolute; left: 0; top: 0; display: inline-flex; gap: 12px; white-space: nowrap; will-change: transform; }
.ticker-card { display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 999px; border: 1px solid rgba(148,163,184,0.35); background: rgba(15,23,42,0.5); color: #e2e8f0; }
body.theme-light .ticker-card { background: rgba(255,255,255,0.8); color: #0f172a; border-color: rgba(2,6,23,0.12); }

/* 不同行不同速度与延迟，越慢越平滑 */
.ticker-row.row-0 .ticker-track { animation: ticker-move-0 60s linear infinite; }
.ticker-row.row-1 .ticker-track { animation: ticker-move-1 70s linear infinite; }
.ticker-row.row-2 .ticker-track { animation: ticker-move-2 80s linear infinite; }
.ticker-row.row-3 .ticker-track { animation: ticker-move-3 90s linear infinite; }
.ticker-row.row-4 .ticker-track { animation: ticker-move-4 100s linear infinite; }

@keyframes ticker-move-0 { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes ticker-move-1 { from { transform: translateX(-10%); } to { transform: translateX(-60%); } }
@keyframes ticker-move-2 { from { transform: translateX(-20%); } to { transform: translateX(-70%); } }
@keyframes ticker-move-3 { from { transform: translateX(-30%); } to { transform: translateX(-80%); } }
@keyframes ticker-move-4 { from { transform: translateX(-40%); } to { transform: translateX(-90%); } }