/* ============ 设计令牌 ============ */
:root {
  --bg-0: #0b1020;
  --bg-1: #121a33;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.14);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --text-0: #f5f7ff;
  --text-1: rgba(245, 247, 255, 0.72);
  --text-2: rgba(245, 247, 255, 0.45);
  --accent: #5b8cff;
  --accent-2: #9b6bff;
  --danger: #ff5b7a;
  --ok: #46d39a;
  --radius: 18px;
  --radius-sm: 12px;
  --tabbar-h: 64px;
  --topbar-h: 60px;
  --maxw: 980px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-0);
  background:
    radial-gradient(1200px 800px at 12% -10%, #1b2a5e 0%, transparent 55%),
    radial-gradient(1000px 700px at 110% 10%, #3a1f6b 0%, transparent 50%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  background-attachment: fixed;
  min-height: 100vh;
  line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; display: block; }

/* ============ 玻璃材质 ============ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* ============ 顶部栏 ============ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-top: none;
}
.topbar-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 16px;
}
.brand { font-weight: 800; font-size: 20px; letter-spacing: .5px; white-space: nowrap; }
.brand-dot { color: var(--accent-2); margin: 0 2px; }
.topbar-search { flex: 1; }
.topbar-search input {
  width: 100%;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.18);
  color: var(--text-0);
  padding: 0 16px;
  outline: none;
}
.topbar-search input::placeholder { color: var(--text-2); }
.topbar-user { display: flex; align-items: center; gap: 8px; white-space: nowrap; }
.topbar-user .uname { font-size: 14px; color: var(--text-1); }

/* ============ 页面主体 ============ */
.page-host {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 16px calc(var(--tabbar-h) + 28px);
  min-height: calc(100vh - var(--topbar-h));
}
.page.hidden { display: none; }

.section-title {
  font-size: 18px;
  font-weight: 700;
  margin: 6px 4px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ============ 卡片 ============ */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
  transition: transform .18s ease, background .18s ease;
}
.card:active { transform: scale(.99); }
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card .meta { font-size: 12px; color: var(--text-2); display: flex; gap: 10px; flex-wrap: wrap; }
.card .summary { color: var(--text-1); font-size: 14px; margin: 8px 0 0; }
.card .tags { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }
.tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.18);
  color: #cdd9ff;
  border: 1px solid rgba(91, 140, 255, 0.3);
}

/* 行布局卡片（ROM / 帖子列表） */
.row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.row .thumb {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; flex-shrink: 0;
}
.row .row-main { flex: 1; min-width: 0; }
.row .row-main .t { font-weight: 600; }
.row .row-main .s { font-size: 12px; color: var(--text-2); }

/* ============ 按钮 ============ */
.btn {
  border: 1px solid var(--glass-border);
  background: var(--glass-bg-strong);
  color: var(--text-0);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  cursor: pointer;
  transition: all .15s ease;
}
.btn:hover { background: rgba(255,255,255,0.22); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: none; color: #fff; }
.btn.ghost { background: transparent; }
.btn.block { display: block; width: 100%; }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.btn.danger { background: rgba(255,91,122,.2); border-color: rgba(255,91,122,.4); color: #ffd1db; }

/* ============ 底部 Tab ============ */
.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 50;
  height: var(--tabbar-h);
  border-radius: 0;
  border-left: none; border-right: none; border-bottom: none;
  display: flex;
  padding-bottom: env(safe-area-inset-bottom);
}
.tabbar-inner, .tabbar { max-width: 100%; }
.tabbar {
  display: flex;
  align-items: stretch;
}
.tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  cursor: pointer;
  font-size: 11px;
  transition: color .15s ease;
}
.tab .tab-ico { font-size: 20px; line-height: 1; }
.tab.active { color: var(--text-0); }
.tab.active .tab-ico { transform: translateY(-1px); filter: drop-shadow(0 0 8px var(--accent)); }

/* ============ 表单 ============ */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--text-1); margin-bottom: 6px; }
.input {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(0,0,0,0.2);
  color: var(--text-0);
  padding: 0 14px;
  font-size: 15px;
  outline: none;
}
.input:focus { border-color: var(--accent); }
.input-row { display: flex; gap: 8px; }
.input-row .input { flex: 1; }

/* ============ 浮层 / Modal ============ */
.modal-mask {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(0,0,0,.5);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; transition: opacity .2s ease;
}
.modal-mask.show { opacity: 1; }
.modal {
  width: 100%; max-width: 440px;
  border-radius: var(--radius);
  padding: 20px;
  transform: translateY(12px); transition: transform .2s ease;
}
.modal-mask.show .modal { transform: translateY(0); }
.modal-head { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.modal-body { font-size: 14px; color: var(--text-1); }
.modal-foot { display: flex; gap: 10px; justify-content: flex-end; margin-top: 18px; }
.confirm-msg { margin: 0; }

/* ============ Toast ============ */
#toastRoot {
  position: fixed; left: 50%; top: 22%;
  transform: translateX(-50%);
  z-index: 100; display: flex; flex-direction: column; gap: 8px; align-items: center;
}
.toast {
  padding: 10px 18px; border-radius: 999px; font-size: 14px;
  color: #fff; opacity: 0; transform: translateY(-8px);
  transition: all .25s ease; max-width: 80vw; text-align: center;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.danger { background: rgba(255,91,122,.92); }
.toast.ok { background: rgba(70,211,154,.92); }

/* ============ 空状态 ============ */
.empty-state {
  text-align: center; color: var(--text-2);
  padding: 40px 0; font-size: 14px;
}

/* ============ 头像 ============ */
.avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; flex-shrink: 0;
}

/* ============ 详情页 / 文章阅读 ============ */
.detail-head { margin-bottom: 14px; }
.detail-head h2 { margin: 0 0 8px; font-size: 22px; }
.detail-body { font-size: 15px; color: var(--text-1); line-height: 1.8; word-break: break-word; }
.detail-body img { border-radius: var(--radius-sm); margin: 12px 0; }
.back-btn { margin-bottom: 12px; }

/* ============ 操作条（赞踩/收藏） ============ */
.action-bar { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.action-bar .btn.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; }

/* ============ 评论（两级） ============ */
.comment { display: flex; gap: 10px; margin-bottom: 14px; }
.comment .c-main { flex: 1; min-width: 0; }
.comment .c-name { font-weight: 600; font-size: 14px; }
.comment .c-text { font-size: 14px; color: var(--text-1); margin: 2px 0; }
.comment .c-meta { font-size: 12px; color: var(--text-2); display: flex; gap: 12px; }
.comment .c-meta a { cursor: pointer; }
.comment.reply { margin-left: 44px; padding-left: 12px; border-left: 2px solid var(--glass-border); }
.reply-to { color: var(--accent); }

/* ============ 筛选条 ============ */
.filter-bar { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0 12px; margin: 0 -4px; }
.filter-bar .chip {
  flex-shrink: 0; padding: 7px 14px; border-radius: 999px; font-size: 13px;
  border: 1px solid var(--glass-border); background: var(--glass-bg); color: var(--text-1); cursor: pointer;
}
.filter-bar .chip.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; }

/* ============ 登录态 / 用户中心 ============ */
.center-box { max-width: 420px; margin: 8vh auto 0; }
.menu-list .card { display: flex; align-items: center; justify-content: space-between; cursor: pointer; }
.menu-list .card:active { transform: scale(.99); }

/* ============ 加载更多 ============ */
.load-more { text-align: center; padding: 14px; }
.spinner {
  width: 22px; height: 22px; border-radius: 50%;
  border: 2px solid var(--glass-border); border-top-color: var(--accent);
  animation: spin .8s linear infinite; margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============ 桌面端优化 ============ */
@media (min-width: 768px) {
  .topbar-search { max-width: 420px; margin: 0 auto; }
  .card { padding: 20px; }
  .page-host { padding-top: 26px; }
}