:root {
  color-scheme: dark;
  --bg: #060b16;
  --bg-panel: rgba(12, 22, 43, 0.78);
  --text: #ebf2ff;
  --muted: #9ab0d8;
  --line: rgba(124, 176, 255, 0.28);
  --primary: #44d3ff;
  --primary-strong: #00a8ff;
  --shadow: 0 20px 45px rgba(0, 5, 20, 0.45);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 20% 20%, rgba(0, 127, 255, 0.2), transparent 40%),
    radial-gradient(circle at 80% 10%, rgba(88, 80, 255, 0.25), transparent 35%),
    linear-gradient(160deg, #040913 0%, #09142b 42%, #071222 100%);
  color: var(--text);
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  filter: blur(38px);
  opacity: 0.4;
  z-index: 0;
  pointer-events: none;
}

.bg-glow-1 {
  background: #5f7dff;
  top: -120px;
  left: -100px;
}

.bg-glow-2 {
  background: #02b7ff;
  bottom: -120px;
  right: -80px;
}

.container {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  padding: 60px 24px 80px;
}

.hero {
  margin-bottom: 28px;
}

.tag {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #b9d8ff;
  letter-spacing: 0.08em;
  font-size: 12px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 5.4vw, 50px);
  line-height: 1.15;
  letter-spacing: 0.06em;
  font-family: "Orbitron", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 600;
  background: linear-gradient(90deg, #77e7ff 0%, #57adff 45%, #8b8dff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 16px rgba(98, 198, 255, 0.28);
}

.subtitle-main {
  margin-top: 12px;
  font-size: clamp(18px, 2.8vw, 24px);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #d5e8ff;
}

.subtitle {
  margin-top: 14px;
  color: var(--muted);
  font-size: clamp(15px, 2.2vw, 18px);
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 22px;
}

.actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.action-btn {
  display: block;
  text-decoration: none;
  border-radius: 12px;
  border: 1px solid rgba(76, 175, 255, 0.4);
  padding: 18px 16px;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.action-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(94, 213, 255, 0.9);
  box-shadow: 0 12px 28px rgba(0, 128, 255, 0.26);
}

.action-btn:active {
  transform: translateY(0);
}

.primary {
  background: linear-gradient(140deg, rgba(0, 148, 255, 0.24), rgba(0, 204, 255, 0.14));
}

.btn-title {
  display: block;
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
}

.btn-desc {
  display: block;
  margin-top: 8px;
  color: #b3c7e8;
  font-size: 14px;
}

.site-footer {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  max-width: 980px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 24px 24px;
  text-align: center;
  border-top: 1px solid var(--line);
  box-sizing: border-box;
}

.site-footer__line {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  align-content: center;
  gap: 4px 8px;
  margin: 0 auto;
  padding: 0;
  width: 100%;
  max-width: 100%;
  font-size: 11px;
  line-height: 1.45;
  text-align: center;
  color: #8e9196;
}

.site-footer__sep {
  color: #6d7178;
  user-select: none;
  flex-shrink: 0;
}

/* 覆盖浏览器默认链接色（含未访问 / 已访问） */
.site-footer .site-footer__link,
.site-footer .site-footer__link:link,
.site-footer .site-footer__link:visited,
.site-footer .site-footer__link:active {
  color: #8e9196 !important;
  text-decoration: none;
  border-bottom: 1px solid rgba(142, 145, 150, 0.4);
  transition: color 0.15s ease, border-color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
}

.site-footer .site-footer__link:hover {
  color: #a3a6ab !important;
  border-bottom-color: rgba(163, 166, 171, 0.55);
}

@media (max-width: 640px) {
  .container {
    padding: 40px 16px 56px;
  }

  .panel {
    padding: 16px;
    border-radius: 12px;
  }

  .btn-title {
    font-size: 16px;
  }

  .site-footer {
    padding: 16px 16px 20px;
  }

  .site-footer__line {
    font-size: 10px;
  }
}