:root {
    --cream:   #F3FBF7;
    --card:    #FFFCF6;
    --ink:     #4A3728;
    --ink-soft:#8A7462;
    --coral:   #F2704B;
    --coral-dark:#D8562F;
    --peach:   #FFD9B8;
    --teal:    #3B7A78;
    --yellow:  #FFC857;
    --shadow:  rgba(74, 55, 40, 0.14);
    --line:    rgba(74, 55, 40, 0.12);
    --font-display: 'Long Cang', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 20px;
    --radius-sm: 12px;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(135deg, #EAFBF3, #FFF9F0);
    background-attachment: fixed;
    color: var(--ink);
    font-family: var(--font-body);
    line-height: 1.6;
  }
  :focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; border-radius: 4px; }

  /* ---------- 登录 ---------- */
  .login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
  }
  .login-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 36px 32px;
    max-width: 380px;
    width: 100%;
    box-shadow: 0 12px 32px var(--shadow);
    text-align: center;
  }
  .login-card h1 {
    font-family: var(--font-display);
    color: var(--coral-dark);
    font-size: 2.4rem;
    margin: 0 0 4px;
  }
  .login-card p.sub {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--ink-soft);
    margin: 0 0 24px;
  }
  .login-field { text-align: left; margin-bottom: 14px; display: flex; flex-direction: column; gap: 6px; }
  .login-field label { font-size: 0.82rem; color: var(--ink-soft); font-weight: 500; }
  .login-field select, .login-field input {
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--line);
    background: #fff;
    color: var(--ink);
  }
  .login-error {
    color: var(--coral-dark);
    font-size: 0.82rem;
    min-height: 1.2em;
    margin-bottom: 8px;
  }

  /* ---------- 通用按钮 ---------- */
  .btn {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.92rem;
    border: none;
    border-radius: 999px;
    padding: 11px 26px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
  }
  .btn--primary { background: var(--coral); color: #fff; box-shadow: 0 6px 16px rgba(242, 112, 75, 0.35); width: 100%; }
  .btn--primary:hover { transform: translateY(-1px); }
  .btn--ghost { background: var(--peach); color: var(--ink); padding: 9px 18px; font-size: 0.85rem; }
  .btn--small { padding: 7px 16px; font-size: 0.8rem; }
  .btn:disabled { opacity: 0.5; cursor: not-allowed; }

  /* ---------- 顶栏 ---------- */
  .topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 20px clamp(20px, 5vw, 56px);
  }
  .brand__mark { font-family: var(--font-display); font-size: 1.9rem; color: var(--coral-dark); margin-right: 8px; cursor: pointer; transition: opacity 0.15s ease; }
  .brand__mark:hover { opacity: 0.75; }
  .brand__mark:focus-visible { outline: 3px solid var(--teal); outline-offset: 3px; border-radius: 6px; }
  .brand__sub { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); }
  .whoami { display: flex; align-items: center; gap: 10px; background: var(--card); border: 1px solid var(--line); padding: 6px 8px 6px 14px; border-radius: 999px; box-shadow: 0 2px 8px var(--shadow); flex-wrap: wrap; }
  .whoami__col { display: flex; flex-direction: column; line-height: 1.3; }
  .whoami__name { font-weight: 700; font-size: 0.88rem; }
  .whoami__lastlogin { font-family: var(--font-mono); font-size: 0.65rem; color: var(--ink-soft); }

  /* ---------- 账号设置子菜单标签 ---------- */
  .account-tabs { display: flex; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--line); }
  .account-tab {
    font-family: var(--font-body); font-size: 0.86rem; font-weight: 600;
    padding: 8px 4px; border: none; background: none; color: var(--ink-soft);
    cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px;
  }
  .account-tab.is-active { color: var(--coral-dark); border-bottom-color: var(--coral); }

  /* ---------- 主体 ---------- */
  .stage { max-width: 720px; margin: 0 auto; padding: 0 clamp(16px, 5vw, 24px) 80px; }

  /* ---------- 左右分栏布局 ---------- */
  .stage-split { max-width: 1140px; margin: 0 auto; padding: 0 clamp(16px, 4vw, 24px) 80px; }
  .split-layout { display: flex; align-items: flex-start; gap: 0; }
  .split-left { flex: 0 0 62%; max-width: 62%; min-width: 0; }
  .split-right { flex: 0 0 38%; max-width: 38%; min-width: 0; padding-left: 24px; }
  .split-divider {
    flex: 0 0 40px; display: flex; flex-direction: column; align-items: center;
    gap: 12px; padding-top: 40px; position: sticky; top: 20px;
  }
  .divider-btn {
    width: 34px; height: 34px; border-radius: 50%;
    border: none; background: var(--card);
    box-shadow: 0 3px 10px var(--shadow), inset 0 0 0 1px var(--line);
    cursor: pointer; font-size: 0.85rem; color: var(--teal);
    display: flex; align-items: center; justify-content: center; padding: 0;
    transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
  }
  .divider-btn:hover { background: var(--teal); color: #fff; transform: scale(1.08); }
  .divider-btn:active { transform: scale(0.95); }
  .split-left.is-hidden, .split-right.is-hidden { display: none; }
  .split-layout.mode-left-only .split-left { flex: 1 1 100%; max-width: 100%; }
  .split-layout.mode-right-only .split-right { flex: 1 1 100%; max-width: 100%; padding-left: 0; }
  .own-posts__title { font-family: var(--font-display); font-size: 1.3rem; color: var(--coral-dark); margin: 24px 0 12px; }

  @media (max-width: 860px) {
    .split-layout { flex-direction: column; }
    .split-left, .split-right { flex: 1 1 100%; max-width: 100%; padding-left: 0; }
    .split-divider { display: none; }
    .split-right { margin-top: 32px; border-top: 1px dashed var(--line); padding-top: 24px; }
  }

  .composer { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(20px, 4vw, 28px); box-shadow: 0 10px 30px var(--shadow); margin-bottom: 28px; }
  .composer h2 { font-family: var(--font-display); font-size: 1.5rem; color: var(--coral-dark); margin: 0 0 16px; }
  .field { margin-bottom: 14px; display: flex; flex-direction: column; gap: 6px; }
  .field label { font-size: 0.8rem; color: var(--ink-soft); font-weight: 500; }
  .field textarea, .field input[type=text], .field input[type=url] {
    font-family: var(--font-body); font-size: 0.95rem; padding: 11px 14px;
    border-radius: var(--radius-sm); border: 1px solid var(--line); background: #fff; color: var(--ink); resize: vertical;
  }

  .media-tabs { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
  .media-tab {
    font-family: var(--font-body); font-size: 0.82rem; font-weight: 600;
    padding: 7px 16px; border-radius: 999px; border: 1px solid var(--line);
    background: #fff; color: var(--ink-soft); cursor: pointer;
  }
  .media-tab.is-active { background: var(--teal); color: #fff; border-color: var(--teal); }
  .media-input { display: none; }
  .media-input.is-active { display: block; }

  .composer__footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
  .composer__hint { font-family: var(--font-mono); font-size: 0.76rem; color: var(--coral-dark); min-height: 1em; }
  .file-preview { max-width: 160px; max-height: 120px; border-radius: var(--radius-sm); border: 1px solid var(--line); margin-top: 6px; }

  /* ---------- Feed ---------- */
  .feed { display: flex; flex-direction: column; gap: 18px; }
  .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px clamp(16px, 4vw, 24px); box-shadow: 0 6px 18px var(--shadow); }
  .card__head { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
  .avatar { width: 38px; height: 38px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; flex-shrink: 0; border: 2px solid var(--line); }
  .card__who { display: flex; flex-direction: column; }
  .card__author { font-weight: 700; font-size: 0.9rem; }
  .card__time { font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-soft); }
  .card__text { font-size: 0.95rem; margin: 0 0 12px; white-space: pre-wrap; }
  .card__media { margin-bottom: 12px; }
  .card__media img { max-width: 100%; border-radius: var(--radius-sm); display: block; }
  .card__media video { max-width: 100%; border-radius: var(--radius-sm); display: block; }
  .card__media audio { width: 100%; }
  .card__media iframe { width: 100%; border: none; border-radius: var(--radius-sm); }
  .media-fallback { font-family: var(--font-mono); font-size: 0.8rem; color: var(--teal); }

  .card__actions { display: flex; align-items: center; gap: 16px; border-top: 1px dashed var(--line); padding-top: 10px; }
  .like-btn { background: none; border: none; cursor: pointer; font-size: 0.88rem; font-weight: 600; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; padding: 0; }
  .like-btn.is-liked { color: var(--coral-dark); }
  .comment-toggle { background: none; border: none; cursor: pointer; font-size: 0.85rem; font-weight: 600; color: var(--ink-soft); padding: 0; }

  .comments { margin-top: 12px; display: none; }
  .comments.is-open { display: block; }
  .comments__list { list-style: none; margin: 0 0 12px; padding: 0; display: flex; flex-direction: column; gap: 8px; }
  .comment { background: var(--cream); border-radius: var(--radius-sm); padding: 8px 12px; font-size: 0.85rem; display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; }
  .comment__author { font-weight: 700; color: var(--coral-dark); }
  .comment__time { font-family: var(--font-mono); font-size: 0.66rem; color: var(--ink-soft); margin-left: auto; }
  .comments__form { display: flex; gap: 8px; }
  .comments__input { flex: 1; padding: 9px 14px; border-radius: 999px; border: 1px solid var(--line); font-family: var(--font-body); font-size: 0.85rem; }

  /* ---------- 而家听紧（挂喺帖子/头像上） ---------- */
  .card__np {
    font-size: 0.74rem; color: var(--teal); font-weight: 600;
    display: inline-block; margin-top: 2px; text-decoration: none;
  }
  a.card__np:hover { text-decoration: underline; }
  .post-delete {
    margin-left: auto; background: none; border: none; cursor: pointer;
    font-size: 0.9rem; opacity: 0.6; padding: 4px;
  }
  .post-delete:hover { opacity: 1; }
  .comment__delete {
    background: none; border: none; cursor: pointer; color: var(--ink-soft);
    font-size: 0.72rem; padding: 0 0 0 4px; opacity: 0.6;
  }
  .comment__delete:hover { opacity: 1; color: var(--coral-dark); }
  .avatar { cursor: default; }
  .avatar--lg { width: 56px; height: 56px; font-size: 1.6rem; }
  .profile-popup__head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
  .profile-popup__head h3 { font-family: var(--font-display); color: var(--coral-dark); font-size: 1.4rem; margin: 0; }
  .profile-popup__np {
    background: var(--cream); border-radius: var(--radius-sm); padding: 10px 14px;
    display: flex; flex-direction: column; gap: 4px; margin-bottom: 16px; font-size: 0.9rem;
  }
  .profile-popup__np .np-label { font-size: 0.75rem; color: var(--ink-soft); font-weight: 600; }
  .profile-popup__np a { color: var(--teal); }
  .profile-popup__empty { color: var(--ink-soft); font-size: 0.88rem; margin-bottom: 16px; }

  /* ---------- 推荐区块 ---------- */
  .recommend { margin-bottom: 24px; }
  .recommend__title { font-family: var(--font-display); font-size: 1.4rem; color: var(--coral-dark); margin: 0 0 12px; }
  .recommend__list { display: flex; flex-direction: column; gap: 14px; }
  .hot-badge {
    display: inline-block; background: var(--yellow); color: var(--ink);
    font-size: 0.72rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 8px;
  }

  /* ---------- 搜索 + 排序工具栏 ---------- */
  .toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; }
  .search {
    flex: 1; min-width: 180px; font-family: var(--font-body); font-size: 0.9rem;
    padding: 10px 16px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--ink);
  }
  .sort-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
  .sort-tab {
    font-family: var(--font-body); font-size: 0.8rem; font-weight: 600;
    padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line);
    background: #fff; color: var(--ink-soft); cursor: pointer;
  }
  .sort-tab.is-active { background: var(--coral); color: #fff; border-color: var(--coral); }

  /* ---------- 评论区游客称呼输入 ---------- */
  .comments__nickname {
    width: 84px; flex-shrink: 0; padding: 9px 10px; border-radius: 999px;
    border: 1px solid var(--line); font-family: var(--font-body); font-size: 0.8rem;
  }

  .empty { text-align: center; font-family: var(--font-display); font-size: 1.3rem; color: var(--ink-soft); padding: 40px 0; }
  .toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 10px 20px; border-radius: 999px; font-size: 0.85rem; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; z-index: 50; }
  .toast.is-visible { opacity: 0.94; }

  /* ---------- 账号设置弹窗 ---------- */
  .modal-overlay {
    position: fixed; inset: 0; background: rgba(74, 55, 40, 0.35);
    display: flex; align-items: center; justify-content: center;
    z-index: 60; padding: 20px;
  }
  .modal-card {
    background: var(--card); border-radius: var(--radius);
    padding: 28px clamp(20px, 4vw, 30px); max-width: 380px; width: 100%;
    box-shadow: 0 20px 50px var(--shadow);
    max-height: 90vh; overflow-y: auto;
  }
  .modal-card h3 { font-family: var(--font-display); color: var(--coral-dark); font-size: 1.5rem; margin: 0 0 16px; }
  .readonly-field { background: var(--cream); color: var(--ink-soft); padding: 10px 14px; border-radius: var(--radius-sm); font-size: 0.9rem; }
  .modal-error { color: var(--coral-dark); font-size: 0.8rem; min-height: 1.1em; margin: 0 0 6px; }
  .modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 6px; }

  @media (max-width: 560px) {
    .card__actions { gap: 12px; }
  }