:root {
    --bg: #FFF8DC;
    --card-bg: #FFFBF0;
    --text: #3D3D3D;
    --text-light: #666;
    --border: #8B7355;
    --dashed-border: #999;
    --title-green: #5B9A47;
    --tag-orange: #E8A853;
    --tag-blue: #5DADE2;
    --tag-green: #58D68D;
    --tag-cyan: #48C9B0;
    --shadow: rgba(139, 115, 85, 0.12);
    --blurred-bg: #ddd;
    --input-bg: #fff;
  }

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

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    padding: 40px 20px;
    line-height: 1.8;
  }

  .container { max-width: 800px; margin: 0 auto; }

  /* ── 主标题 ── */
  .main-title {
    font-size: clamp(2.4rem, 6vw, 3.6rem);
    color: var(--title-green);
    font-weight: 900;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
    text-shadow: 2px 2px 0 rgba(91,154,71,0.15), -1px -1px 0 rgba(255,255,255,0.6);
    position: relative;
    display: inline-block;
  }
  .main-title::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 4px; right: 4px;
    height: 3px;
    background: var(--title-green);
    opacity: 0.25;
    border-radius: 2px;
  }

  /* ── 卡片通用 ── */
  .card {
    background: var(--card-bg);
    border: 2px dashed var(--dashed-border);
    border-radius: 18px;
    padding: 24px 28px;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px var(--shadow);
    position: relative;
    min-width: 0; /* 防止解锁后内容撑宽列，保证两列等宽 */
  }

  .tag-header {
    display: inline-block;
    padding: 5px 18px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    letter-spacing: 0.06em;
    position: relative;
    top: -4px; left: -6px;
  }
  .tag-orange { background: var(--tag-orange); }
  .tag-blue   { background: var(--tag-blue); }
  .tag-green  { background: var(--tag-green); }
  .tag-cyan   { background: var(--tag-cyan); }

  /* ── 顶部自介卡 ── */
  .intro-card { display: flex; gap: 24px; align-items: center; }
  .intro-text { flex: 1; font-size: 0.95rem; line-height: 2; }
  .intro-text ul { list-style: none; padding: 0; }
  .intro-text li { padding-left: 1.2em; position: relative; }
  .intro-text li::before {
    content: '•'; position: absolute; left: 0;
    color: var(--title-green); font-weight: bold;
  }
  .avatar-area {
    width: 150px; height: 180px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
  }
  .avatar-area img, .avatar-placeholder {
    width: 140px; height: 170px; object-fit: cover; border-radius: 16px;
  }
  .avatar-placeholder {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 3rem;
  }

  /* ── 下方网格 ── */
  .grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .info-card p { font-size: 0.93rem; line-height: 1.95; color: var(--text); }
  /* 同一卡片内相邻段落之间增加间距与细分隔线，提升区分度 */
  .info-card p + p {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--dashed-border);
    opacity: 0.92;
  }

  .blurred-section {
    filter: blur(5px);
    user-select: none;
    background: var(--blurred-bg);
    color: transparent;
    border-radius: 6px;
    padding: 8px 12px;
    display: block;
    max-width: 100%;
    box-sizing: border-box;
    word-break: break-all;
    line-height: 1.5;
    cursor: default;
  }

  /* ── 解锁表单 ── */
  .secret-question { font-size: 0.9rem; color: var(--text-light); margin-bottom: 10px; }
  .unlock-form { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
  .unlock-form input {
    flex: 1; min-width: 140px;
    padding: 8px 14px;
    border: 2px solid var(--dashed-border);
    border-radius: 12px;
    font-size: 0.95rem;
    background: var(--input-bg); color: var(--text); outline: none;
  }
  .unlock-form input:focus { border-color: var(--title-green); }
  .unlock-form button {
    padding: 8px 20px; border: none; border-radius: 12px;
    background: var(--title-green); color: #fff;
    font-weight: 700; cursor: pointer; font-size: 0.95rem;
  }
  .unlock-form button:active { transform: translateY(1px); }
  .unlock-msg { font-size: 0.85rem; color: #c0392b; }
  .unlock-msg.ok { color: var(--title-green); }
  .contact-display {
    display: inline-block; margin-top: 14px;
    font-size: 0.85rem; color: var(--title-green);
    text-decoration: none; border-bottom: 1px dashed var(--title-green);
    transition: opacity .2s;
  }
  .contact-display:hover { opacity: 0.7; }
  .shake { animation: shake 0.4s; }
  @keyframes shake {
    0%,100% { transform: translateX(0); }
    25% { transform: translateX(-6px); }
    75% { transform: translateX(6px); }
  }
  .secret-content {
    margin-top: 14px; font-size: 0.93rem; line-height: 1.95;
    white-space: pre-wrap; color: var(--text);
    overflow-wrap: break-word; word-break: break-word;
  }
  /* 解密内容中的链接（如 <a>）采用主题色，确保可见且可点击 */
  .secret-content a {
    color: var(--title-green); text-decoration: none;
    border-bottom: 1px solid var(--title-green);
    transition: opacity .2s;
  }
  .secret-content a:hover { opacity: 0.7; }

  .footer-line {
    text-align: center; margin-top: 32px;
    color: var(--text-light); font-size: 0.82rem; opacity: 0.5;
  }
  .footer-line.beian {
    margin-top: 6px; opacity: 0.7; font-size: 0.78rem;
  }
  .footer-line.beian a {
    color: var(--text-light); text-decoration: none;
    border-bottom: 1px solid transparent; transition: border-color .2s, color .2s;
  }
  .footer-line.beian a:hover {
    color: var(--text); border-bottom-color: var(--text-light);
  }

  @media (max-width: 600px) {
    body { padding: 24px 12px; }
    .intro-card { flex-direction: column-reverse; align-items: stretch; text-align: left; }
    .avatar-area { width: 120px; height: 145px; margin: 0 auto; }
    .avatar-area img, .avatar-placeholder { width: 110px; height: 130px; }
    .intro-text li::before { content: '•'; left: 0; transform: none; }
    .intro-text li { padding-left: 1.2em; }
    .grid-2col { grid-template-columns: 1fr; gap: 16px; }
    .card { padding: 18px 20px; }
  }

  /* ── 深色模式：跟随系统偏好（用户未手动设置浅色时）── */
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      --bg: #1e1b16;
      --card-bg: #2a2620;
      --text: #e8e4dc;
      --text-light: #a89f90;
      --border: #6b5a45;
      --dashed-border: #4a4339;
      --title-green: #7bc264;
      --tag-orange: #e8a853;
      --tag-blue: #6cb8e8;
      --tag-green: #6fe0a0;
      --tag-cyan: #5fd6bf;
      --shadow: rgba(0, 0, 0, 0.4);
      --blurred-bg: #3a352d;
      --input-bg: #211e19;
    }
    :root:not([data-theme="light"]) .main-title {
      text-shadow: 2px 2px 0 rgba(123,194,100,0.2), -1px -1px 0 rgba(0,0,0,0.4);
    }
  }

  /* ── 深色模式：手动切换（优先级高于系统偏好）── */
  :root[data-theme="dark"] {
    --bg: #1e1b16;
    --card-bg: #2a2620;
    --text: #e8e4dc;
    --text-light: #a89f90;
    --border: #6b5a45;
    --dashed-border: #4a4339;
    --title-green: #7bc264;
    --tag-orange: #e8a853;
    --tag-blue: #6cb8e8;
    --tag-green: #6fe0a0;
    --tag-cyan: #5fd6bf;
    --shadow: rgba(0, 0, 0, 0.4);
    --blurred-bg: #3a352d;
    --input-bg: #211e19;
  }
  :root[data-theme="dark"] .main-title {
    text-shadow: 2px 2px 0 rgba(123,194,100,0.2), -1px -1px 0 rgba(0,0,0,0.4);
  }

  /* ── 深色模式切换按钮 ── */
  .theme-toggle {
    position: fixed;
    top: 20px; right: 20px;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 2px solid var(--dashed-border);
    background: var(--card-bg);
    color: var(--text);
    font-size: 1.2rem; line-height: 1;
    cursor: pointer; z-index: 100;
    box-shadow: 0 2px 8px var(--shadow);
    transition: transform .2s, background .2s, color .2s, border-color .2s;
  }
  .theme-toggle:hover { transform: scale(1.08); }
  .theme-toggle:active { transform: scale(0.96); }