:root {
  --bg-overlay-1: rgba(0, 0, 0, 0.58);
  --bg-overlay-2: rgba(0, 0, 0, 0.35);
  --bg-overlay-3: rgba(0, 0, 0, 0.45);

  --text: rgba(255, 255, 255, 0.96);
  --muted: rgba(255, 255, 255, 0.78);
  --line: rgba(255, 255, 255, 0.24);
  --line-strong: rgba(255, 255, 255, 0.5);
  --brand-icon-filter: brightness(0) invert(1);

  --card-bg: linear-gradient(135deg, rgba(255,255,255,0.16), rgba(255,255,255,0.08));
  --item-bg: linear-gradient(180deg, rgba(255,255,255,0.10), rgba(255,255,255,0.05));
  --item-bg-hover: linear-gradient(180deg, rgba(255,255,255,0.16), rgba(255,255,255,0.08));
  --quick-bg: linear-gradient(180deg, rgba(255,255,255,0.16), rgba(255,255,255,0.08));
  --topbar-bg: linear-gradient(180deg, rgba(255,255,255,0.18), rgba(255,255,255,0.08));

  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --blur: 24px;
  --radius-xl: 28px;
  --radius-lg: 18px;

  --page-padding: 32px 20px;
  --content-width: 880px;
  --card-width: 460px;
}

html[data-theme="light"] {
  --bg-overlay-1: rgba(235, 241, 248, 0.28);
  --bg-overlay-2: rgba(250, 252, 255, 0.14);
  --bg-overlay-3: rgba(228, 236, 246, 0.24);

  --text: rgba(27, 35, 48, 0.96);
  --muted: rgba(43, 55, 74, 0.72);
  --line: rgba(255, 255, 255, 0.44);
  --line-strong: rgba(255, 255, 255, 0.78);
  --brand-icon-filter: none;

  --card-bg: linear-gradient(135deg, rgba(255,255,255,0.52), rgba(255,255,255,0.22));
  --item-bg: linear-gradient(180deg, rgba(255,255,255,0.36), rgba(255,255,255,0.18));
  --item-bg-hover: linear-gradient(180deg, rgba(255,255,255,0.58), rgba(255,255,255,0.28));
  --quick-bg: linear-gradient(180deg, rgba(255,255,255,0.46), rgba(255,255,255,0.22));
  --topbar-bg: linear-gradient(180deg, rgba(255,255,255,0.46), rgba(255,255,255,0.22));

  --shadow: 0 22px 60px rgba(44, 60, 82, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "PingFang SC", "PingFang TC", "PingFang HK", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  font-weight: 400;
  background: #000;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body { min-height: 100vh; }

.page-shell { min-height: 100vh; opacity: 1; }
.page-shell.is-loading .fade-item { opacity: 0; transform: translateY(22px) scale(0.985); }
.fade-item {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(.2,.8,.2,1);
}
.page-shell.ready .fade-item:nth-child(1) { transition-delay: 0.05s; }
.page-shell.ready .fade-item:nth-child(2) { transition-delay: 0.12s; }
.page-shell.ready .fade-item:nth-child(3) { transition-delay: 0.20s; }
.page-shell.ready .fade-item:nth-child(4) { transition-delay: 0.28s; }
.page-shell.ready .fade-item:nth-child(5) { transition-delay: 0.36s; }

.topbar {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 10;
}
.topbar-actions { display: flex; gap: 10px; }

.ghost-btn {
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255,255,255,0.30);
  border-radius: 999px;
  cursor: pointer;
  color: var(--text);
  background: var(--topbar-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.16);
  transition: transform .2s ease, box-shadow .25s ease, border-color .25s ease;
}
.ghost-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(255,255,255,0.18), 0 10px 30px rgba(0,0,0,0.20);
  border-color: rgba(255,255,255,0.55);
}
.ghost-btn--lang {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.ghost-btn--theme {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.theme-icon {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  transition: opacity .2s ease, transform .2s ease;
}
.theme-icon svg { width: 22px; height: 22px; }
html[data-theme="dark"] .theme-icon--sun,
html[data-theme="light"] .theme-icon--moon { opacity: 0; transform: scale(.84); pointer-events: none; }
html[data-theme="dark"] .theme-icon--moon,
html[data-theme="light"] .theme-icon--sun { opacity: 1; transform: scale(1); }

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--page-padding);
  background:
    linear-gradient(to bottom, var(--bg-overlay-1), var(--bg-overlay-2) 30%, var(--bg-overlay-3) 100%),
    url("./assets/bg.svg") center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 42%, rgba(255,255,255,0.08), transparent 28%),
    radial-gradient(circle at 50% 55%, rgba(255,210,130,0.08), transparent 35%),
    linear-gradient(to right, rgba(0,0,0,0.55), transparent 20%, transparent 80%, rgba(0,0,0,0.28));
  pointer-events: none;
}
html[data-theme="light"] .hero::before {
  background:
    radial-gradient(circle at 50% 42%, rgba(255,255,255,0.20), transparent 28%),
    radial-gradient(circle at 50% 55%, rgba(126,168,255,0.10), transparent 35%),
    linear-gradient(to right, rgba(255,255,255,0.12), transparent 20%, transparent 80%, rgba(255,255,255,0.08));
}

.content {
  position: relative;
  z-index: 1;
  width: min(100%, var(--content-width));
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.avatar {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.42);
  background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05)), rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.28), inset 0 1px 0 rgba(255,255,255,0.18);
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  position: relative;
  overflow: hidden;
}
.avatar::before,
.avatar::after {
  content: "";
  position: absolute;
  width: 34px;
  height: 1.5px;
  background: rgba(255,255,255,0.22);
  border-radius: 999px;
}
.avatar::before { transform: rotate(45deg); }
.avatar::after { transform: rotate(-45deg); }
.avatar.has-image::before,
.avatar.has-image::after { display: none; }

h1 {
  margin: 0;
  font-size: clamp(2.45rem, 4.4vw, 4rem);
  line-height: 1.06;
  font-weight: 400;
  letter-spacing: -0.045em;
  text-shadow: 0 4px 18px rgba(0,0,0,0.22);
}
.subtitle {
  max-width: 640px;
  margin: 18px auto 30px;
  font-size: 1rem;
  line-height: 1.86;
  color: var(--muted);
  font-weight: 400;
  text-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.card {
  width: min(100%, var(--card-width));
  padding: 18px;
  border-radius: var(--radius-xl);
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.2);
  box-shadow: var(--shadow);
  backdrop-filter: blur(var(--blur)) saturate(130%);
  -webkit-backdrop-filter: blur(var(--blur)) saturate(130%);
}
.links { display: flex; flex-direction: column; gap: 14px; }

.link-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  min-height: 58px;
  padding: 0 18px 0 20px;
  text-decoration: none;
  color: var(--text);
  border-radius: var(--radius-lg);
  background: var(--item-bg);
  border: 1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 6px 18px rgba(0,0,0,0.06);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease, background .22s ease;
}
.link-item::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity .22s ease;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.10), 0 0 22px rgba(255,255,255,0.18), 0 0 44px rgba(139,196,255,0.14);
}
.link-item:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: var(--item-bg-hover);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.12), 0 12px 30px rgba(0,0,0,0.12);
}
.link-item:hover::after { opacity: 1; }

.link-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.link-text {
  font-size: 1rem;
  font-weight: 400;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.link-right {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  opacity: 0.92;
  flex: 0 0 auto;
  line-height: 0;
}
.link-icon {
  width: 22px;
  height: 22px;
  display: inline-block;
  flex: 0 0 auto;
}
.link-icon--wide {
  width: 40px;
  height: 24px;
}
.brand-icon-png {
  display: block;
  width: 22px;
  height: 22px;
  object-fit: contain;
  filter: var(--brand-icon-filter);
  transform: translateZ(0);
}
.brand-icon-png--wide {
  width: auto;
  height: 18px;
  max-width: 56px;
}

.socials {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin-top: 28px;
}

.copyright {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  text-align: center;
}

[data-theme="light"] .copyright,
body.light .copyright {
  color: rgba(0, 0, 0, 0.55);
}

.social-btn {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text);
  background: var(--quick-bg);
  border: 1px solid rgba(255,255,255,0.32);
  box-shadow: 0 10px 30px rgba(0,0,0,0.22), inset 0 1px 0 rgba(255,255,255,0.12);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: transform .2s ease, box-shadow .22s ease, border-color .22s ease;
}
.social-btn::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12), 0 0 24px rgba(255,255,255,0.18), 0 0 42px rgba(139,196,255,0.14);
}
.social-btn:hover {
  transform: translateY(-3px);
  border-color: rgba(255,255,255,0.5);
  box-shadow: 0 14px 34px rgba(0,0,0,0.24), inset 0 1px 0 rgba(255,255,255,0.18);
}
.social-btn:hover::after { opacity: 1; }
.social-btn svg { width: 24px; height: 24px; }

@media (max-width: 640px) {
  .hero { padding: 24px 16px; background-position: center center; }
  .topbar { top: 14px; right: 14px; }
  .ghost-btn { width: 44px; height: 44px; }
  .avatar { width: 78px; height: 78px; margin-bottom: 16px; }
  .subtitle { margin: 14px auto 24px; font-size: 0.95rem; line-height: 1.76; }
  .card { width: 100%; padding: 14px; border-radius: 24px; }
  .link-item { min-height: 54px; padding: 0 16px; }
  .social-btn { width: 52px; height: 52px; }
  .link-icon--wide { width: 36px; }
  .brand-icon-png { width: 20px; height: 20px; }
  .brand-icon-png--wide { height: 17px; max-width: 52px; }
}