:root {
  --bg: #07080f;
  --panel: rgba(16, 19, 34, 0.72);
  --line: rgba(90, 140, 255, 0.22);
  --accent: #4da3ff;
  --accent2: #a06bff;
  --pink: #ff5ecf;
  --text: #dbe6ff;
  --muted: #7d8bb0;
  --mono: "Cascadia Mono", "Consolas", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(77, 163, 255, 0.16), transparent 60%),
    radial-gradient(800px 480px at 90% 10%, rgba(160, 107, 255, 0.14), transparent 60%),
    radial-gradient(700px 500px at 50% 110%, rgba(255, 94, 207, 0.08), transparent 60%);
}

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 28px; border-bottom: 1px solid var(--line);
  position: sticky; top: 0; background: rgba(7, 8, 15, 0.82); backdrop-filter: blur(10px); z-index: 5;
}
.brand { font-family: var(--mono); letter-spacing: 2px; font-size: 15px; color: var(--muted); }
.brand b { color: var(--text); font-weight: 600; }
.logo-dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); margin-right: 10px; }
.sys-badge { font-size: 11px; color: var(--accent2); border: 1px solid var(--line); padding: 4px 10px; border-radius: 20px; letter-spacing: 1px; }

.lang-switch { display: flex; gap: 4px; margin-left: 14px; }
.lang-switch button {
  background: rgba(8, 10, 20, 0.85); color: var(--muted); border: 1px solid var(--line);
  border-radius: 6px; padding: 4px 10px; font-size: 12px; font-family: var(--mono);
  letter-spacing: 1px; cursor: pointer; transition: color 0.2s, border-color 0.2s, box-shadow 0.2s;
}
.lang-switch button:hover { color: var(--text); border-color: var(--accent); }
.lang-switch button.on {
  color: #fff; border-color: var(--accent);
  background: linear-gradient(90deg, rgba(77,163,255,0.25), rgba(160,107,255,0.25));
  box-shadow: 0 0 10px rgba(77,163,255,0.25);
}

.shell { max-width: 860px; margin: 26px auto 60px; padding: 0 18px; display: grid; gap: 16px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px;
  backdrop-filter: blur(6px);
  animation: fade 0.4s ease;
}
.panel-title { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.panel-title h1, .panel-title h2 { font-size: 17px; font-weight: 600; letter-spacing: 1px; }
.tag { font-family: var(--mono); font-size: 11px; color: var(--accent2); border: 1px solid var(--line); padding: 3px 9px; border-radius: 6px; }
.tag i { font-style: normal; color: var(--muted); }

.field { margin-bottom: 16px; }
.field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 7px; letter-spacing: 1px; }
.field .muted { color: var(--muted); font-weight: normal; }

textarea, select, input[type=text] {
  width: 100%; background: rgba(8, 10, 20, 0.85); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 11px 13px;
  font-size: 13.5px; line-height: 1.6; outline: none; transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}
textarea:focus, select:focus, input[type=text]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(77,163,255,0.12); }
textarea { resize: vertical; }
select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--accent) 50%), linear-gradient(135deg, var(--accent) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
.hint { text-align: right; font-size: 11px; color: var(--muted); margin-top: 4px; font-family: var(--mono); }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.range-wrap { display: flex; align-items: center; gap: 12px; }
.range-wrap input[type=range] { flex: 1; accent-color: var(--accent); }
.range-wrap span { font-family: var(--mono); color: var(--accent); font-size: 14px; min-width: 34px; }

.btn-primary {
  width: 100%; margin-top: 4px; padding: 13px; border: none; border-radius: 9px; cursor: pointer;
  background: linear-gradient(90deg, var(--accent), var(--accent2)); color: #fff;
  font-size: 15px; font-weight: 600; letter-spacing: 3px;
  box-shadow: 0 6px 24px rgba(77, 163, 255, 0.28);
  transition: transform 0.15s, opacity 0.2s, filter 0.2s;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; }

.err { margin-top: 14px; padding: 11px 13px; border-radius: 8px; background: rgba(255, 60, 90, 0.12); border: 1px solid rgba(255, 60, 90, 0.4); color: #ff8aa0; font-size: 13px; }
.hidden { display: none !important; }

/* progress */
.bar { height: 7px; border-radius: 8px; background: rgba(90,140,255,0.12); overflow: hidden; margin: 10px 0 20px; }
.bar-inner { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), var(--accent2), var(--pink)); background-size: 200% 100%; animation: slide 2s linear infinite; transition: width 0.6s; }
.step-line { display: flex; align-items: center; font-size: 12.5px; color: var(--muted); }
.step-line .s { flex: none; opacity: 0.45; }
.step-line .s.on { color: var(--accent); opacity: 1; }
.step-line .sep { flex: 1; height: 1px; background: var(--line); margin: 0 10px; }

/* result */
#resultVideo { width: 100%; border-radius: 10px; border: 1px solid var(--line); background: #000; }
.result-meta { margin-top: 12px; font-size: 12px; color: var(--muted); font-family: var(--mono); line-height: 1.9; }
.link { color: var(--accent); cursor: pointer; text-decoration: none; }
.link:hover { text-decoration: underline; }

.footer-note { font-size: 12px; color: var(--muted); line-height: 2; border-style: dashed; }
.footer-note div { opacity: 0.85; }

.howto ol { padding-left: 20px; font-size: 13px; color: var(--muted); line-height: 2.1; }
.howto li::marker { color: var(--accent); }

@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@keyframes slide { from { background-position: 0 0; } to { background-position: 200% 0; } }

@media (max-width: 640px) {
  .topbar { padding: 13px 16px; }
  .sys-badge { display: none; }
  .lang-switch { margin-left: 0; }
  .lang-switch button { padding: 3px 8px; font-size: 11px; }
  .row { grid-template-columns: 1fr; }
  .shell { padding: 0 12px; }
}


/* ---- 社交面板：浏览量 / 关注 / 分享 ---- */
.social-panel { display: flex; flex-wrap: wrap; gap: 16px 22px; align-items: center; justify-content: space-between; }
.social-views { display: flex; align-items: baseline; gap: 10px; }
.views-num { font-family: var(--mono); font-size: 28px; font-weight: 700; letter-spacing: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), #ff8ac2);
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.views-label { font-size: 12px; color: var(--muted); letter-spacing: 1px; }
.social-actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.social-share { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.share-hint { font-size: 12px; color: var(--muted); margin-right: 2px; }
.sbtn {
  font-family: var(--mono); font-size: 12px; padding: 6px 10px; border-radius: 7px;
  border: 1px solid var(--line); background: rgba(255,255,255,0.03); color: #cdd6ff; cursor: pointer;
  transition: all .15s ease;
}
.sbtn:hover { border-color: var(--accent); color: #fff; background: rgba(77,163,255,0.12); }
.sbtn.follow {
  border: 1px solid transparent;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #fff; font-weight: 700; padding: 7px 14px; letter-spacing: 1px;
}
.sbtn.follow:hover { filter: brightness(1.1); background: linear-gradient(90deg, var(--accent), var(--accent2)); }
.sbtn.follow.on { background: rgba(77,163,255,0.15); border-color: var(--accent); color: #9fd1ff; }
.social-tip { width: 100%; font-size: 12px; color: var(--muted); min-height: 0; }
@media (max-width: 640px) {
  .social-panel { flex-direction: column; align-items: flex-start; gap: 12px; }
  .views-num { font-size: 24px; }
}