:root {
  --bg: #0b0f17;
  --bg-soft: #111826;
  --panel: #141c2b;
  --panel-2: #182234;
  --border: #253044;
  --text: #e6edf7;
  --text-dim: #9aa8bd;
  --text-faint: #6b7a91;
  --primary: #4f8cff;
  --primary-hover: #6fa1ff;
  --accent: #21d4a5;
  --warn: #f5a524;
  --danger: #ef4d5b;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 18px 40px rgba(0, 0, 0, .35);
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-hover); text-decoration: none; }
a:hover { text-decoration: underline; }

.boot-screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.boot-logo { font-size: 22px; font-weight: 700; letter-spacing: .5px; }
.boot-text { color: var(--text-faint); font-size: 13px; }

/* ---------- layout ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(11, 15, 23, .86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  width: 80%;
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 24px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .4px;
}
.nav-brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 12px rgba(79, 140, 255, .8);
}
.nav-links { display: flex; gap: 6px; flex-wrap: wrap; }
.nav-links a {
  color: var(--text-dim);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--text);
  background: var(--panel-2);
  text-decoration: none;
}
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.nav-credits {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  border: 1px solid rgba(33, 212, 165, .35);
  background: rgba(33, 212, 165, .08);
  padding: 4px 10px;
  border-radius: 999px;
}
.container { width: 80%; max-width: 1440px; margin: 0 auto; padding: 28px 24px 80px; }
.container.narrow { max-width: 760px; }
.page-narrow { width: 100%; max-width: 760px; margin: 0 auto; }
.footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 12px;
}

/* ---------- hero ---------- */
.hero { padding: 56px 0 32px; }
.hero h1 {
  font-size: 40px;
  line-height: 1.25;
  margin: 0 0 14px;
  background: linear-gradient(120deg, #ffffff, #9fc4ff 60%, #21d4a5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--text-dim); font-size: 15px; max-width: 720px; margin: 0 0 22px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.badge {
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  background: var(--panel);
}

.section-title { font-size: 20px; margin: 40px 0 16px; }
.section-sub { color: var(--text-faint); margin-top: -10px; margin-bottom: 20px; font-size: 13px; }

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-auto { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
@media (max-width: 900px) {
  .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1024px) {
  .container, .nav-inner { width: 92%; }
}
@media (max-width: 640px) {
  .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; }
  .container, .nav-inner { width: 94%; }
  .container { padding: 20px 12px 60px; }
  .nav-inner { padding: 12px 12px; gap: 12px; flex-wrap: wrap; }
  .hero h1 { font-size: 30px; }
}

/* ---------- card ---------- */
.card {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card.hoverable { transition: transform .18s ease, border-color .18s ease; }
.card.hoverable:hover { transform: translateY(-3px); border-color: rgba(79, 140, 255, .55); }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.card-desc { color: var(--text-faint); font-size: 12.5px; margin-bottom: 16px; }
.plan-card { position: relative; display: flex; flex-direction: column; }
.plan-card.featured { border-color: rgba(79, 140, 255, .6); box-shadow: 0 0 0 1px rgba(79,140,255,.25), var(--shadow); }
.plan-ribbon {
  position: absolute; top: -10px; right: 16px;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #06101f; font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 999px;
}
.plan-name { font-size: 16px; font-weight: 600; }
.plan-price { font-size: 30px; font-weight: 700; margin: 12px 0 2px; }
.plan-price small { font-size: 13px; color: var(--text-faint); font-weight: 400; }
.plan-old { color: var(--text-faint); text-decoration: line-through; font-size: 13px; }
.plan-features { list-style: none; padding: 0; margin: 16px 0 20px; display: grid; gap: 8px; flex: 1; }
.plan-features li { color: var(--text-dim); font-size: 13px; padding-left: 20px; position: relative; }
.plan-features li::before {
  content: '✓'; position: absolute; left: 0; color: var(--accent); font-size: 12px;
}
.plan-meta { font-size: 12px; color: var(--text-faint); margin-bottom: 12px; }

/* ---------- form ---------- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 6px; }
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  background: #0f1622;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 140, 255, .16);
}
input::placeholder { color: var(--text-faint); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s ease, background .15s ease, opacity .15s ease;
}
.btn:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn.block { width: 100%; }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text-dim); }
.btn.ghost:hover { color: var(--text); border-color: var(--primary); background: rgba(79,140,255,.08); }
.btn.accent { background: linear-gradient(120deg, var(--accent), #35e0b2); color: #052319; }
.btn.danger { background: var(--danger); }
.btn.sm { padding: 6px 12px; font-size: 12.5px; }

.form-card { max-width: 420px; margin: 40px auto; }
.form-title { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.form-hint { color: var(--text-faint); font-size: 13px; margin-bottom: 20px; }
.form-footer { margin-top: 16px; color: var(--text-faint); font-size: 13px; text-align: center; }
.error-box {
  background: rgba(239, 77, 91, .1);
  border: 1px solid rgba(239, 77, 91, .35);
  color: #ffb3ba;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 14px;
}

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 560px; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--panel-2); color: var(--text-dim); font-weight: 600; font-size: 12px; }
tbody tr:hover { background: rgba(79, 140, 255, .05); }
tbody tr:last-child td { border-bottom: none; }
.mono { font-family: var(--mono); font-size: 12.5px; }

.tag {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; border: 1px solid var(--border); color: var(--text-dim);
}
.tag.ok { color: var(--accent); border-color: rgba(33,212,165,.4); background: rgba(33,212,165,.08); }
.tag.pending { color: var(--warn); border-color: rgba(245,165,36,.4); background: rgba(245,165,36,.08); }
.tag.fail { color: var(--danger); border-color: rgba(239,77,91,.4); background: rgba(239,77,91,.08); }
.tag.info { color: var(--primary-hover); border-color: rgba(79,140,255,.4); background: rgba(79,140,255,.08); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; }
.stat .value { font-size: 24px; font-weight: 700; font-family: var(--mono); }
.stat .label { color: var(--text-faint); font-size: 12.5px; }
.stat .sub { color: var(--accent); font-size: 12px; }

.progress { height: 6px; background: #0f1622; border-radius: 999px; overflow: hidden; border: 1px solid var(--border); }
.progress > div { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); }

.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs button {
  background: transparent; border: 1px solid var(--border); color: var(--text-dim);
  padding: 7px 14px; border-radius: 999px; cursor: pointer; font-size: 13px;
}
.tabs button.active { background: var(--panel-2); color: var(--text); border-color: var(--primary); }

.empty {
  padding: 40px; text-align: center; color: var(--text-faint); font-size: 13px;
  border: 1px dashed var(--border); border-radius: var(--radius);
}

.pay-box { text-align: center; padding: 12px 0; }
.pay-amount { font-size: 34px; font-weight: 700; margin: 8px 0 4px; }
.qr-placeholder {
  width: 220px; height: 220px; margin: 0 auto 14px;
  border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-faint); font-size: 12.5px; text-align: center; padding: 16px;
  background: repeating-linear-gradient(45deg, #0f1622, #0f1622 10px, #121a29 10px, #121a29 20px);
}
.code-box {
  font-family: var(--mono); font-size: 26px; letter-spacing: 4px; text-align: center;
  padding: 18px; border: 1px dashed var(--border); border-radius: var(--radius);
  margin: 12px 0; color: var(--accent);
}
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 8px 14px; font-size: 13px; }
.kv dt { color: var(--text-faint); }
.kv dd { margin: 0; }

.card.accent-border { border-color: var(--accent); }
.checkbox-row { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--text-faint); }
.checkbox-row input { width: auto; margin: 0; }
.chat-content {
  white-space: pre-wrap; word-break: break-word; line-height: 1.7; font-size: 13.5px;
  padding: 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--panel-2); max-height: 320px; overflow: auto;
}
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.muted { color: var(--text-faint); }
.small { font-size: 12.5px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; }

.toast-root { position: fixed; right: 20px; bottom: 20px; display: grid; gap: 10px; z-index: 99; }
.toast {
  padding: 11px 16px; border-radius: var(--radius-sm);
  background: var(--panel-2); border: 1px solid var(--border);
  box-shadow: var(--shadow); font-size: 13px; min-width: 200px;
  animation: toast-in .22s ease;
}
.toast.ok { border-color: rgba(33,212,165,.5); }
.toast.err { border-color: rgba(239,77,91,.5); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

pre.code-block {
  background: #0f1622; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px; overflow-x: auto; font-size: 12.5px; color: var(--text-dim);
}

/* ---------- download ---------- */
.dl-tabs { margin-bottom: 18px; }
.dl-tabs button { font-size: 13px; }
.dl-panel.hidden { display: none; }
.dl-prod { padding: 22px; }
.dl-head { display: flex; gap: 16px; align-items: flex-start; }
.dl-ico {
  width: 46px; height: 46px; flex: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
}
.dl-head-main { flex: 1; min-width: 0; }
.dl-name { display: flex; align-items: center; gap: 8px; font-size: 17px; font-weight: 700; flex-wrap: wrap; }
.dl-meta { flex: none; display: flex; gap: 20px; }
.dl-meta div { display: flex; flex-direction: column; }
.dl-meta span { font-size: 11.5px; color: var(--text-faint); }
.dl-meta b { font-size: 13px; font-family: var(--mono); }
.dl-feat {
  list-style: none; margin: 18px 0 0; padding: 16px 0 0;
  border-top: 1px solid var(--border);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 6px 20px;
}
.dl-feat li { position: relative; padding-left: 18px; font-size: 13px; color: var(--text-dim); }
.dl-feat li::before { content: '✓'; position: absolute; left: 0; color: var(--accent); }
.dl-sub { margin: 20px 0 10px; font-size: 13px; font-weight: 600; color: var(--text-dim); }
.dl-opts { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.dl-opt {
  position: relative; display: flex; flex-direction: column; gap: 4px;
  padding: 14px 16px; text-decoration: none;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); transition: border-color .18s ease, transform .18s ease;
}
.dl-opt:hover { border-color: rgba(79,140,255,.65); transform: translateY(-2px); text-decoration: none; }
.dl-opt.recommend { border-color: rgba(79,140,255,.6); background: rgba(79,140,255,.08); }
.dl-opt-label { font-size: 14px; font-weight: 600; }
.dl-opt-hint { font-size: 12px; color: var(--text-faint); }
.dl-opt-go { position: absolute; right: 14px; top: 12px; color: var(--primary-hover); font-size: 14px; }
.dl-opt-badge {
  position: absolute; right: 34px; top: 14px;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  color: #06101f; font-size: 10.5px; font-weight: 700; padding: 2px 8px; border-radius: 999px;
}
.dl-copy { margin-top: 16px; display: flex; align-items: center; gap: 10px; }
.dl-url {
  flex: 1; min-width: 0;
  font-family: var(--mono); font-size: 12px; color: var(--text-dim);
  background: #0f1622; border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
@media (max-width: 720px) {
  .dl-head { flex-direction: column; }
  .dl-meta { gap: 14px; }
}