/* ===== 主题变量 ===== */
:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg-grad: linear-gradient(180deg, #000000 0%, #33363e 100%);
  --island-bg: rgba(15, 17, 22, 0.72);
  --island-shadow: 0 12px 36px rgba(0, 0, 0, 0.55);
  --border: rgba(255, 255, 255, 0.14);
  --text: #ffffff;
  --text-mid: #cfd3db;
  --text-dim: #9aa1b0;
  --halo: rgba(190, 195, 205, 0.30);
  --avatar-border: rgba(210, 214, 224, 0.55);
  --avatar-glow: 0 0 46px rgba(200, 204, 214, 0.38), 0 18px 44px rgba(0, 0, 0, 0.5);
  --status-dot: #b7bcc6;
  --divider: rgba(255, 255, 255, 0.16);
}

[data-theme="light"] {
  color-scheme: light;
  --bg-grad: linear-gradient(180deg, #ffffff 0%, #a9aeb9 100%);
  --island-bg: rgba(255, 255, 255, 0.72);
  --island-shadow: 0 12px 36px rgba(40, 44, 52, 0.28);
  --border: rgba(0, 0, 0, 0.14);
  --text: #0b0c10;
  --text-mid: #33373f;
  --text-dim: #4d525c;
  --halo: rgba(70, 74, 84, 0.22);
  --avatar-border: rgba(60, 64, 72, 0.45);
  --avatar-glow: 0 0 46px rgba(90, 94, 104, 0.45), 0 18px 44px rgba(40, 44, 52, 0.25);
  --status-dot: #5c616b;
  --divider: rgba(0, 0, 0, 0.18);
}

/* ===== 基础 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  background: var(--bg-grad) fixed;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: 96px;
  transition: color 0.3s ease;
}

/* ===== 灵动岛导航 ===== */
.island {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 9px 10px 9px 10px;
  border-radius: 999px;
  background: var(--island-bg);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--island-shadow);
  white-space: nowrap;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.5px;
  text-decoration: none;
}

.logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text);
  box-shadow: 0 0 8px var(--text-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--text);
}

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--text-dim);
  transform: rotate(15deg);
}

[data-theme="dark"] .icon-moon {
  display: none;
}

[data-theme="light"] .icon-sun {
  display: none;
}

/* ===== 主区 ===== */
.hero {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 60px 24px 60px;
  display: flex;
  align-items: center;
  gap: 72px;
}

.avatar-wrap {
  flex-shrink: 0;
  padding: 26px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--halo) 0%, transparent 70%);
}

.avatar {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  border: 1px solid var(--avatar-border);
  box-shadow: var(--avatar-glow);
  transition: box-shadow 0.3s ease;
}

.intro {
  max-width: 480px;
  animation: rise 0.6s ease both;
}

.name {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.2;
  color: var(--text);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--divider);
}

.tagline {
  margin-top: 20px;
  font-size: 18px;
  color: var(--text-mid);
}

.bio {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.status {
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-dot);
  box-shadow: 0 0 6px var(--status-dot);
  animation: blink 2s infinite;
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 13px;
  color: var(--text-dim);
  border-top: 1px solid var(--divider);
}

/* ===== 动画 ===== */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ===== 响应式 ===== */
@media (max-width: 680px) {
  body {
    padding-top: 84px;
  }

  .island {
    top: 12px;
    gap: 10px;
    padding: 6px 6px 6px 8px;
    max-width: calc(100vw - 20px);
  }

  .logo {
    font-size: 13px;
    padding: 6px 12px;
  }

  .nav-links {
    gap: 12px;
  }

  .nav-link {
    font-size: 13px;
  }

  .theme-toggle {
    width: 34px;
    height: 34px;
  }

  .hero {
    flex-direction: column;
    text-align: center;
    gap: 24px;
    padding-top: 24px;
  }

  .avatar-wrap {
    padding: 18px;
  }

  .avatar {
    width: 150px;
    height: 150px;
  }

  .name {
    font-size: 34px;
  }

  .status {
    justify-content: center;
  }
}