* { box-sizing: border-box; }
:root {
  --bg: #070b18;
  --panel: rgba(15, 23, 44, .78);
  --line: rgba(108, 134, 255, .22);
  --text: #f5f8ff;
  --muted: #93a6ce;
  --cyan: #28d7ff;
  --violet: #7c5cff;
  --pink: #f05cff;
}
html { min-height: 100%; }
body {
  min-height: 100%;
  margin: 0;
  color: var(--text);
  font-family: "Microsoft YaHei UI", "Segoe UI", Arial, sans-serif;
  background: var(--bg);
}
a { color: inherit; text-decoration: none; }
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 18% 18%, rgba(37, 216, 255, .24), transparent 34%),
    radial-gradient(circle at 80% 15%, rgba(128, 86, 255, .28), transparent 32%),
    radial-gradient(circle at 55% 78%, rgba(240, 92, 255, .13), transparent 34%),
    linear-gradient(135deg, #060916, #0d1428 55%, #070b18);
}
.site-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, #000 0, transparent 72%);
}
.site-header {
  width: min(1180px, calc(100% - 36px));
  height: 76px;
  margin: 18px auto 0;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(7, 12, 26, .66);
  backdrop-filter: blur(18px);
  box-shadow: 0 20px 70px rgba(0, 0, 0, .28);
}
.site-brand { display: flex; align-items: center; gap: 12px; font-size: 22px; font-weight: 900; letter-spacing: .4px; }
.site-brand img { width: 58px; height: 38px; object-fit: contain; filter: drop-shadow(0 0 16px rgba(40, 215, 255, .34)); }
.site-nav { display: flex; align-items: center; gap: 8px; }
.site-nav a, .site-nav button {
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 10px 14px;
  color: #b8c6e4;
  background: transparent;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
}
.site-nav a:hover, .site-nav a.active, .site-nav button:hover {
  color: #fff;
  border-color: rgba(40, 215, 255, .28);
  background: rgba(40, 215, 255, .08);
}
.site-nav form { margin: 0; }
.nav-cta {
  color: #fff !important;
  background: linear-gradient(135deg, rgba(124, 92, 255, .9), rgba(40, 215, 255, .86)) !important;
  border-color: rgba(255,255,255,.16) !important;
}
.site-main { width: min(1180px, calc(100% - 36px)); margin: 0 auto; padding: 46px 0 36px; }
.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 28px;
  align-items: center;
}
.hero-copy h1 { margin: 0; font-size: clamp(42px, 6vw, 78px); line-height: 1.04; letter-spacing: -2px; }
.eyebrow {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 8px 13px;
  border-radius: 999px;
  color: #9ef2ff;
  border: 1px solid rgba(40,215,255,.28);
  background: rgba(40,215,255,.08);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 1.2px;
}
.hero-copy h1 span {
  display: block;
  color: transparent;
  background: linear-gradient(120deg, #fff, #7defff 42%, #c691ff);
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-copy p { width: min(620px, 100%); color: #a9b9db; font-size: 18px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 26px; }
.hero-mini { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.hero-mini span {
  padding: 8px 11px;
  border-radius: 999px;
  color: #bcc9e7;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(126,146,255,.16);
  font-size: 13px;
  font-weight: 800;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 15px;
  padding: 0 22px;
  color: #fff;
  font-weight: 900;
  background: linear-gradient(135deg, #745cff, #19ccef);
  box-shadow: 0 16px 38px rgba(40, 215, 255, .16);
}
.btn.secondary { color: #dbe6ff; background: rgba(18, 27, 50, .82); border: 1px solid var(--line); box-shadow: none; }
.hero-panel {
  position: relative;
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 30px;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(20, 31, 60, .78), rgba(7, 11, 24, .72));
  box-shadow: inset 0 1px rgba(255,255,255,.05), 0 30px 80px rgba(0,0,0,.36);
}
.panel-window {
  position: absolute;
  inset: 70px 36px 46px;
  border: 1px solid rgba(126,146,255,.24);
  border-radius: 24px;
  background: rgba(8,13,28,.62);
  overflow: hidden;
}
.panel-top {
  height: 54px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border-bottom: 1px solid rgba(126,146,255,.16);
  color: #dfe8ff;
}
.panel-top b { margin-right: auto; }
.panel-top span {
  width: 11px; height: 11px; border-radius: 50%;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
}
.panel-body { position: relative; height: 178px; }
.orb {
  position: absolute;
  width: 178px;
  height: 178px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 28%, #b79dff, #765cff 52%, #332bd1);
  box-shadow: 0 0 90px rgba(124, 92, 255, .58), inset 0 0 38px rgba(255,255,255,.18);
  animation: orbPulse 3.4s ease-in-out infinite;
}
.mode-stack {
  position: absolute;
  right: 20px;
  top: 30px;
  display: grid;
  gap: 10px;
}
.mode-stack i {
  width: 92px; height: 34px; border-radius: 11px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(126,146,255,.22);
}
.mode-stack i:nth-child(2) { background: linear-gradient(135deg, rgba(124,92,255,.6), rgba(40,215,255,.5)); }
.wave {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 54px;
  height: 82px;
  border-radius: 999px;
  background:
    repeating-linear-gradient(90deg, transparent 0 22px, rgba(92, 239, 255, .36) 23px 25px, transparent 26px 42px),
    linear-gradient(90deg, rgba(33, 217, 255, .1), rgba(167, 104, 255, .22), rgba(240, 92, 255, .10));
  filter: drop-shadow(0 0 24px rgba(40,215,255,.22));
  mask-image: linear-gradient(transparent, #000 30%, #000 70%, transparent);
}
.panel-bottom {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  display: grid;
  grid-template-columns: 1.2fr .8fr 1fr;
  gap: 12px;
}
.panel-bottom em {
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(124,92,255,.78), rgba(40,215,255,.68));
}
.panel-tag {
  position: absolute;
  left: 30px;
  top: 28px;
  display: inline-flex;
  gap: 8px;
  color: #9ceeff;
  border: 1px solid rgba(40,215,255,.28);
  background: rgba(40,215,255,.08);
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 800;
}
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
.feature, .site-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 22px;
  background: var(--panel);
  box-shadow: 0 22px 60px rgba(0,0,0,.22);
}
.feature b { display: block; margin-bottom: 8px; font-size: 18px; }
.feature span, .site-card p, .site-card .muted { color: var(--muted); line-height: 1.75; }
.site-section { margin-top: 22px; }
.section-title { margin: 10px 0 16px; }
.section-title span { color: #7defff; font-weight: 900; letter-spacing: 1px; }
.section-title h2 { margin: 8px 0 0; font-size: 34px; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step {
  position: relative;
  min-height: 178px;
  padding: 22px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20,29,50,.92), rgba(10,16,34,.72));
  overflow: hidden;
}
.step::after {
  content: "";
  position: absolute;
  right: -26px;
  top: -26px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: rgba(40,215,255,.11);
}
.step strong { color: #7defff; font-size: 28px; }
.step b { display: block; margin: 14px 0 7px; font-size: 19px; }
.step p { margin: 0; color: var(--muted); line-height: 1.7; }
.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: 16px; align-items: stretch; }
.neon-card { background: linear-gradient(135deg, rgba(31,44,86,.82), rgba(13,22,45,.76)); }
.visual-bars {
  min-height: 250px;
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 20px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    radial-gradient(circle at center, rgba(124,92,255,.2), transparent 55%),
    rgba(15,23,44,.72);
}
.visual-bars i {
  width: 30px;
  border-radius: 999px;
  background: linear-gradient(180deg, #f05cff, #28d7ff);
  box-shadow: 0 0 28px rgba(40,215,255,.28);
  animation: barBeat 1.6s ease-in-out infinite;
}
.visual-bars i:nth-child(1) { height: 72px; }
.visual-bars i:nth-child(2) { height: 126px; animation-delay: .16s; }
.visual-bars i:nth-child(3) { height: 96px; animation-delay: .31s; }
.visual-bars i:nth-child(4) { height: 172px; animation-delay: .08s; }
.visual-bars i:nth-child(5) { height: 118px; animation-delay: .24s; }
.visual-bars i:nth-child(6) { height: 150px; animation-delay: .39s; }
.visual-bars i:nth-child(7) { height: 82px; animation-delay: .18s; }
@keyframes orbPulse {
  0%, 100% { transform: translate(-50%, -50%) scale(.98); filter: brightness(1); }
  50% { transform: translate(-50%, -50%) scale(1.04); filter: brightness(1.12); }
}
@keyframes barBeat {
  0%, 100% { transform: scaleY(.82); opacity: .72; }
  50% { transform: scaleY(1.08); opacity: 1; }
}
.auth-shell {
  width: min(980px, 100%);
  margin: 20px auto;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 22px;
}
.auth-side h1 { margin: 0 0 12px; font-size: 42px; }
.auth-side p { color: var(--muted); line-height: 1.9; }
.site-card h2 { margin: 0 0 18px; font-size: 28px; }
.form-grid { display: grid; gap: 15px; }
.field label { display: block; margin-bottom: 7px; color: #9fb0d4; font-weight: 700; }
.field input {
  width: 100%;
  min-height: 48px;
  border: 1px solid rgba(126, 146, 255, .26);
  border-radius: 14px;
  padding: 0 14px;
  color: #fff;
  background: rgba(9, 14, 30, .72);
  outline: none;
}
.field input:focus { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(40,215,255,.10); }
.readonly-value {
  min-height: 48px;
  display: flex;
  align-items: center;
  border: 1px solid rgba(126, 146, 255, .18);
  border-radius: 14px;
  padding: 0 14px;
  color: #dfe9ff;
  background: rgba(9, 14, 30, .45);
  font-weight: 800;
  letter-spacing: .04em;
}
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; }
.check-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #b8c6e4; }
.check-row label { display: inline-flex; align-items: center; gap: 8px; }
.check-row input { width: auto; }
.site-flash {
  margin: 0 0 18px;
  padding: 13px 16px;
  border-radius: 15px;
  color: #dff9ff;
  border: 1px solid rgba(40,215,255,.28);
  background: rgba(40,215,255,.10);
}
.site-flash.error { color: #ffd7df; border-color: rgba(255,76,105,.32); background: rgba(255,76,105,.13); }
.site-flash.success { color: #d8ffe9; border-color: rgba(61,220,151,.32); background: rgba(61,220,151,.12); }
.account-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.serial-box {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(40,215,255,.24);
  background: rgba(40,215,255,.08);
  font-size: 24px;
  font-weight: 900;
  letter-spacing: .6px;
}
.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 11px;
  border-radius: 999px;
  color: #7df1ff;
  background: rgba(40,215,255,.10);
}
.status-pill.pending { color: #ffd48a; background: rgba(255,188,77,.12); }
.status-pill.disabled, .status-pill.expired { color: #ff9aaa; background: rgba(255,76,105,.13); }
.site-footer {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto 30px;
  display: flex;
  justify-content: space-between;
  color: #7282a8;
  font-size: 13px;
}
@media (max-width: 900px) {
  .site-header { height: auto; padding: 14px; align-items: flex-start; gap: 12px; }
  .site-nav { flex-wrap: wrap; justify-content: flex-end; }
  .hero, .auth-shell { grid-template-columns: 1fr; }
  .features, .account-grid, .steps, .split { grid-template-columns: 1fr; }
  .hero-panel { min-height: 360px; }
  .site-footer { display: grid; gap: 8px; }
}