@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Syne:wght@600;700;800&display=swap');

:root {
  --bg0: #070b12;
  --bg1: #0d1420;
  --panel: rgba(14, 22, 36, 0.88);
  --panel-solid: #101a2a;
  --ink: #e8eef8;
  --muted: #8b9bb4;
  --line: rgba(94, 234, 212, 0.14);
  --accent: #2dd4bf;
  --accent-2: #38bdf8;
  --accent-ink: #042f2e;
  --danger: #fb7185;
  --ok: #34d399;
  --warn: #fbbf24;
  --glow: rgba(45, 212, 191, 0.18);
  --radius: 14px;
  --font: 'Syne', 'Segoe UI', sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font: 15px/1.5 var(--font);
  color: var(--ink);
  background:
    radial-gradient(900px 480px at 12% -8%, rgba(45, 212, 191, 0.12), transparent 55%),
    radial-gradient(700px 420px at 100% 0%, rgba(56, 189, 248, 0.1), transparent 50%),
    linear-gradient(180deg, var(--bg1), var(--bg0));
  background-attachment: fixed;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(45, 212, 191, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 212, 191, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, #000 35%, transparent 80%);
  z-index: 0;
}
.shell, header, main, .layout { position: relative; z-index: 1; }

a { color: var(--accent); }
a:hover { color: var(--accent-2); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 11, 18, 0.72);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 24px var(--glow);
  display: grid;
  place-items: center;
  color: var(--accent-ink);
  font-weight: 800;
  font-size: 0.85rem;
}
.brand h1 {
  margin: 0;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.brand p {
  margin: 0.1rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--mono);
}
.nav-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; align-items: center; }

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  margin-left: 0.15rem;
}
.lang-btn {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  line-height: 1.2;
}
.lang-btn:hover { color: var(--ink); background: rgba(45, 212, 191, 0.08); }
.lang-btn.active {
  color: var(--accent-ink);
  background: var(--accent);
  font-weight: 600;
}

.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0;
  min-height: calc(100vh - 69px);
}
.side {
  border-right: 1px solid var(--line);
  background: rgba(8, 12, 20, 0.65);
  padding: 1.25rem 0.85rem;
}
.side a {
  display: block;
  text-decoration: none;
  color: var(--muted);
  padding: 0.65rem 0.85rem;
  border-radius: 10px;
  margin-bottom: 0.25rem;
  font-size: 0.92rem;
  transition: background 0.15s, color 0.15s;
}
.side a:hover, .side a.active {
  background: rgba(45, 212, 191, 0.1);
  color: var(--ink);
}
.content { padding: 1.5rem; max-width: 1280px; }
.content table { width: 100%; font-size: 0.88rem; }

.hero {
  padding: 4.5rem 1.5rem 2.5rem;
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
}
.hero .eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
  animation: fadeUp 0.6s ease both;
}
.hero .brand-title {
  margin: 0;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
  background: linear-gradient(105deg, #fff 20%, var(--accent) 70%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: fadeUp 0.7s 0.05s ease both;
}
.hero .lead {
  margin: 1rem auto 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.05rem;
  animation: fadeUp 0.7s 0.1s ease both;
}
.hero-cta {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.75rem;
  animation: fadeUp 0.7s 0.15s ease both;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  max-width: 920px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
}
.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  max-width: 980px;
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.feature-strip > div {
  padding: 1.5rem 1.25rem;
  border-right: 1px solid var(--line);
}
.feature-strip > div:last-child { border-right: none; }
.feature-strip .mono {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.55rem;
}
.feature-strip strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.35rem;
}
.feature-strip p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}
@media (max-width: 780px) {
  .feature-strip { grid-template-columns: 1fr; }
  .feature-strip > div { border-right: none; border-bottom: 1px solid var(--line); }
  .feature-strip > div:last-child { border-bottom: none; }
}

.intro {
  max-width: 980px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
  position: relative;
  z-index: 1;
}
.intro-head {
  margin-bottom: 2rem;
  max-width: 40rem;
}
.intro-kicker {
  margin: 0 0 0.6rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}
.intro-head h3 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 1.9rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
}
.intro-head > p {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}
.intro-block {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 1.25rem 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  animation: fadeUp 0.65s ease both;
}
.intro-block:nth-child(3) { animation-delay: 0.05s; }
.intro-block:nth-child(4) { animation-delay: 0.1s; }
.intro-block:nth-child(5) { animation-delay: 0.15s; }
.intro-label .mono {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.45rem;
}
.intro-label h4 {
  margin: 0 0 0.4rem;
  font-size: 1.15rem;
}
.intro-label p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}
.intro-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}
.intro-list li {
  display: grid;
  gap: 0.15rem;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(45, 212, 191, 0.35);
}
.intro-list strong {
  font-size: 0.95rem;
}
.intro-list span {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}
.intro-flow {
  margin-top: 0.25rem;
  padding: 0;
  border-top: none;
  animation: fadeUp 0.7s 0.2s ease both;
}
.intro-flow h4 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}
.intro-flow ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}
@media (max-width: 960px) {
  .intro-flow ol { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .intro-flow ol { grid-template-columns: 1fr; }
}
.intro-flow li {
  padding: 1rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(14, 22, 36, 0.55);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}
.intro-flow li span {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.45rem;
}
.site-foot {
  text-align: center;
  padding: 0 1.5rem 3rem;
  position: relative;
  z-index: 1;
}
.site-foot .mono {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.8rem;
}
.site-foot p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.site-foot a { text-decoration: none; }

.announce-bar {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0.75rem 1.5rem;
  text-align: center;
  background: rgba(45, 212, 191, 0.1);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  font-size: 0.92rem;
  white-space: pre-wrap;
}
.download-grid {
  display: grid;
  gap: 0.85rem;
}
.download-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(14, 22, 36, 0.55);
}
.download-item .mono {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}
.download-item strong {
  display: block;
  font-size: 1.05rem;
}
.download-item p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}
.contact-box {
  display: grid;
  gap: 0.75rem;
  max-width: 560px;
}
.contact-box > div {
  display: grid;
  gap: 0.2rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(14, 22, 36, 0.55);
}
.contact-box strong {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 500;
}
.contact-box span {
  color: var(--ink);
  font-size: 0.98rem;
}

.guide-home-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}
.guide-builtin {
  padding: 1.2rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(14, 22, 36, 0.55);
}
.guide-builtin .mono {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.45rem;
}
.guide-builtin h4 { margin: 0 0 0.45rem; font-size: 1.05rem; }
.guide-builtin p { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.5; }
.guide-steps {
  margin: 0.9rem 0 0;
  padding-left: 1.15rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}
.tutorial-list {
  display: grid;
  gap: 0.85rem;
}
.tutorial-card {
  display: grid;
  grid-template-columns: minmax(0, 180px) 1fr;
  gap: 1rem;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(14, 22, 36, 0.55);
}
.tutorial-card:not(:has(img)) { grid-template-columns: 1fr; }
.tutorial-thumb {
  width: 100%;
  height: 100%;
  min-height: 120px;
  object-fit: cover;
  display: block;
  background: rgba(0,0,0,.25);
}
.tutorial-card-body { padding: 1rem 1.05rem; }
.tutorial-card-body strong { display: block; font-size: 1.02rem; margin-bottom: 0.35rem; }
.tutorial-card-body p { margin: 0; color: var(--muted); font-size: 0.9rem; line-height: 1.45; }
.tutorial-img {
  display: block;
  width: 100%;
  max-height: 280px;
  object-fit: contain;
  margin: 0 0 0.85rem;
  border-radius: 10px;
  background: rgba(0,0,0,.25);
}
.tutorial-body {
  margin: 0;
  white-space: pre-wrap;
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink);
  max-height: 45vh;
  overflow: auto;
}
.tutorial-dlg { margin: 0; min-width: min(560px, 92vw); }

@media (max-width: 860px) {
  .intro-block { grid-template-columns: 1fr; gap: 0.85rem; }
  .intro-flow ol { grid-template-columns: 1fr 1fr; }
  .guide-home-grid { grid-template-columns: 1fr; }
  .tutorial-card { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .intro-flow ol { grid-template-columns: 1fr; }
}
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.card, .panel, .gate {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(10px);
}
.gate { max-width: 440px; margin: 3rem auto; position: relative; z-index: 1; }
.card h2, .panel h2, .section-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.card p, .muted { color: var(--muted); }
.card .row { margin-top: 1rem; }

.stat {
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(16, 26, 42, 0.9);
}
.stat .k {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.stat .v {
  margin-top: 0.35rem;
  font-size: 1.65rem;
  font-weight: 700;
  font-family: var(--mono);
  color: var(--accent);
}

label {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
input, textarea, select, button { font: inherit; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  background: rgba(7, 11, 18, 0.75);
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, textarea:focus, select:focus {
  border-color: rgba(45, 212, 191, 0.55);
  box-shadow: 0 0 0 3px var(--glow);
}
.row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 0.85rem; }
.row > * { flex: 1 1 140px; }
.field { margin-top: 0.9rem; }

button, .btn {
  border: 0;
  border-radius: 10px;
  padding: 0.6rem 1rem;
  background: linear-gradient(135deg, var(--accent), #14b8a6);
  color: var(--accent-ink);
  cursor: pointer;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: transform 0.12s, filter 0.12s;
}
button:hover, .btn:hover { filter: brightness(1.06); transform: translateY(-1px); }
button.secondary, .btn.secondary {
  background: rgba(148, 163, 184, 0.12);
  color: var(--ink);
  border: 1px solid var(--line);
}
button.danger, .btn.danger {
  background: rgba(251, 113, 133, 0.15);
  color: var(--danger);
  border: 1px solid rgba(251, 113, 133, 0.35);
}
button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.msg {
  margin: 0.85rem 0;
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  background: rgba(148, 163, 184, 0.1);
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  font-family: var(--mono);
  font-size: 0.85rem;
}
.msg.error { background: rgba(251, 113, 133, 0.12); color: var(--danger); }
.msg.ok { background: rgba(52, 211, 153, 0.12); color: var(--ok); }
.hidden { display: none !important; }

.captcha-row { display: flex; gap: 0.75rem; align-items: end; }
.captcha-row > div:first-child { flex: 1; min-width: 0; }
/* Same density as username — never use letter-spacing on the input (looks like auto-spaces). */
input.captcha-input,
input#captcha {
  letter-spacing: normal;
  font-variant-ligatures: none;
  ime-mode: disabled;
}
.captcha-box {
  flex: 0 0 120px;
  width: 120px;
  min-width: 120px;
  height: 44px;
  border: 1px solid rgba(15, 23, 42, 0.25);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}
.captcha-box:empty::after,
.captcha-box[data-state='loading']:not(:has(.captcha-question))::after {
  content: '加载中';
  font-size: 0.75rem;
  color: #64748b;
  font-family: var(--mono);
}
.captcha-box[data-state='error']:not(:has(.captcha-question))::after {
  content: '点击重试';
  color: #b91c1c;
  font-size: 0.75rem;
  font-family: var(--mono);
}
.captcha-question {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: normal;
  color: #0f172a;
  line-height: 1;
  white-space: nowrap;
}
.links { margin-top: 1rem; font-size: 0.9rem; color: var(--muted); }

.toolbar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1rem; align-items: end; }
.toolbar .grow { flex: 1 1 220px; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
th, td {
  text-align: left;
  padding: 0.75rem 0.45rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.72rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.status {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: var(--mono);
  text-transform: uppercase;
}
.status.active { background: rgba(52, 211, 153, 0.15); color: var(--ok); }
.status.unclaimed { background: rgba(148, 163, 184, 0.18); color: var(--muted); }
.status.expired { background: rgba(251, 191, 36, 0.15); color: var(--warn); }
.status.revoked { background: rgba(251, 113, 133, 0.15); color: var(--danger); }
.actions { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.actions button { padding: 0.3rem 0.55rem; font-size: 0.78rem; }
.mono { font-family: var(--mono); font-size: 0.85rem; }

.license-hero {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.25rem;
  align-items: center;
}
.ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at center, var(--panel-solid) 58%, transparent 59%),
    conic-gradient(var(--accent) var(--p, 70%), rgba(148, 163, 184, 0.2) 0);
}
.ring span {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 700;
}
.kv { display: grid; gap: 0.55rem; }
.kv div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 0.4rem;
  font-size: 0.92rem;
}
.kv .k { color: var(--muted); }
.machine-list { list-style: none; padding: 0; margin: 0.75rem 0 0; }
.machine-list li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.tabs { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 1rem; }
.tabs button {
  background: transparent;
  color: var(--muted);
  border: 1px solid transparent;
  font-weight: 600;
}
.tabs button.active {
  color: var(--ink);
  border-color: var(--line);
  background: rgba(45, 212, 191, 0.08);
}

dialog {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.15rem;
  width: min(520px, calc(100vw - 2rem));
  background: var(--panel-solid);
  color: var(--ink);
}
dialog::backdrop { background: rgba(2, 6, 12, 0.72); }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 840px) {
  .layout { grid-template-columns: 1fr; }
  .side {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 0.75rem;
  }
  .side a { white-space: nowrap; margin: 0; }
  .license-hero { grid-template-columns: 1fr; justify-items: center; text-align: center; }
}