:root {
  --bg: #0A0A0A;
  --card: #1A1A1A;
  --accent: #C9A96E;
  --text: #F5F5F5;
  --muted: #888;
  --radius: 16px;
  /* 交互令牌 */
  --accent-soft: rgba(201, 169, 110, 0.08);
  --accent-mid: rgba(201, 169, 110, 0.16);
  --accent-glow: rgba(201, 169, 110, 0.28);
  --line: #2a2a2a;
  --line-hot: rgba(201, 169, 110, 0.5);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.18s;
  --t-mid: 0.24s;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-lift: 0 6px 24px rgba(0, 0, 0, 0.55), 0 0 0 1px var(--line-hot);
}

[data-theme="light"] {
  --bg: #F8F7F4;
  --card: #FFFFFF;
  --text: #1A1A1A;
  --muted: #666;
  --line: #E0E0E0;
  --accent-soft: rgba(201, 169, 110, 0.1);
  --accent-mid: rgba(201, 169, 110, 0.2);
  --accent-glow: rgba(201, 169, 110, 0.3);
  --line-hot: rgba(201, 169, 110, 0.4);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lift: 0 6px 24px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--line-hot);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Songti SC", "Noto Serif SC", "STSong", serif;
  -webkit-font-smoothing: antialiased;
}

/* ===== 响应式布局系统：三档断点渐进式增强 ===== */
.fd-app {
  max-width: 100%;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  position: relative;
  -webkit-tap-highlight-color: transparent;
  -webkit-overflow-scrolling: touch;
}
@supports (min-height: 100dvh) {
  .fd-app { min-height: 100dvh; }
}
.fd-app.fd-has-tabbar { padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px)); }

@media (max-width: 375px) {
  html { font-size: 14px; }
  .fd-app { padding: 0 12px; }
  .fd-header { padding: 40px 0 12px; }
  .fd-header .name { font-size: 16px; }
  .fd-header .sub { font-size: 11px; }
  .fd-card { padding: 12px; margin-top: 10px; }
  .fd-composer { padding: 8px 0 14px; }
  .fd-send { padding: 10px 14px; font-size: 14px; }
}

@media (max-width: 320px) {
  html { font-size: 13px; }
  .fd-app { padding: 0 10px; }
  .fd-card { padding: 10px; }
}

/* 平板 / 小屏 PC（≥480px）—— 560px 居中，细边框悬浮感 */
@media (min-width: 480px) {
  body { background: #060606; }
  .fd-app {
    max-width: 560px;
    padding: 0 24px;
    border-left: 1px solid rgba(201,169,110,0.08);
    border-right: 1px solid rgba(201,169,110,0.08);
    background: var(--bg);
    box-shadow: 0 0 60px rgba(0,0,0,0.5);
  }
  body.news-page .fd-app { max-width: 720px; }
}

/* 大屏 PC（≥900px）—— 680px 居中，画卷质感，背景层次更深 */
@media (min-width: 900px) {
  body { background: #030303; }
  .fd-app {
    max-width: 680px;
    padding: 0 32px;
    border-left: 1px solid rgba(201,169,110,0.12);
    border-right: 1px solid rgba(201,169,110,0.12);
    box-shadow: 0 0 80px rgba(0,0,0,0.7),
                0 0 0 1px rgba(201,169,110,0.03);
  }
  body.news-page .fd-app { max-width: 960px; padding: 0 40px; }
  /* 大屏下微妙的顶部氛围光 */
  .fd-app::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 200px;
    background: linear-gradient(180deg, rgba(201,169,110,0.03) 0%, transparent 100%);
    pointer-events: none;
  }
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--t-fast) var(--ease); }
a:hover { opacity: 0.8; }

.fd-page-transition {
  animation: pageEnter 0.3s ease-out;
}
@keyframes pageEnter {
  0% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

.fd-title {
  color: var(--accent);
  letter-spacing: 2px;
  font-weight: 500;
}

.fd-muted { color: var(--muted); }

.fd-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.fd-input {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  padding: 14px 16px;
  border-radius: var(--radius);
  outline: none;
  transition: border-color var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}
.fd-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.fd-input::placeholder { color: var(--muted); opacity: 0.6; }

.fd-btn {
  width: 100%;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: inherit;
  font-size: 15px;
  padding: 13px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: 4px;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-btn:hover:not([disabled]) {
  background: var(--accent-soft);
  border-color: var(--line-hot);
}
.fd-btn:active:not([disabled]) {
  background: var(--accent-mid);
  transform: scale(0.985);
}
.fd-btn[disabled] { opacity: 0.4; cursor: default; }

/* 实心金按钮（chat.html 文件上传确认 / 下载等） */
.fd-btn-primary {
  background: var(--accent);
  color: #1A1A1A;
  border-color: var(--accent);
  font-weight: 500;
}
.fd-btn-primary:hover:not([disabled]) {
  background: #d4b87e;
  border-color: #d4b87e;
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.fd-btn-primary:active:not([disabled]) {
  background: #b8995c;
  border-color: #b8995c;
  transform: scale(0.985);
}

/* 弱化描边按钮（未选中态） */
.fd-btn-secondary {
  border-color: var(--line);
  color: var(--muted);
}
.fd-btn-secondary:hover:not([disabled]) {
  border-color: var(--line-hot);
  color: var(--accent);
}

.fd-btn-sm {
  width: auto;
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: 1px;
}
.fd-btn-sm.active {
  background: var(--accent);
  color: #1A1A1A;
  border-color: var(--accent);
}

.fd-btn-danger {
  border-color: #e0a6a6;
  color: #e0a6a6;
}
.fd-btn-danger:hover:not([disabled]) {
  background: rgba(224, 166, 166, 0.1);
  border-color: #d68888;
}

.bgm-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px 4px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
}
.bgm-btn:hover {
  background: var(--card);
  border-color: var(--accent-soft);
}
.bgm-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}
.bgm-btn span:first-child {
  font-size: 18px;
  line-height: 1;
}
.bgm-btn .bgm-desc {
  font-size: 10px;
  color: var(--muted);
  margin-top: 4px;
}
.bgm-btn.active .bgm-desc {
  color: var(--accent);
}

.fd-error { color: #c96e6e; font-size: 13px; min-height: 18px; }

/* 顶栏 */
.fd-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* 顶部预留空间，避免右上角「退出 / 返回」链接被固定的 🌐 语言切换浮层遮挡 */
  padding: 46px 0 14px;
  border-bottom: 1px solid #1f1f1f;
}
.fd-header .name { color: var(--accent); font-size: 17px; letter-spacing: 1px; }
.fd-header .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* 卡片 */
.fd-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 12px;
}
.fd-card .row { display: flex; align-items: center; justify-content: space-between; }
.fd-card .rname { font-size: 16px; }
.fd-card .rmeta { color: var(--muted); font-size: 12px; margin-top: 6px; }

.fd-badge {
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 10px;
  font-size: 11px;
  padding: 1px 8px;
  margin-left: 8px;
}

.fd-avatar {
  border-radius: 50%;
  text-align: center;
  color: var(--accent);
  font-family: inherit;
  flex: 0 0 auto;
}

/* 聊天 */
.fd-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 0 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(201, 169, 110, 0.22) transparent;
}
.fd-messages::-webkit-scrollbar { width: 4px; }
.fd-messages::-webkit-scrollbar-track { background: transparent; }
.fd-messages::-webkit-scrollbar-thumb { background: rgba(201, 169, 110, 0.22); border-radius: 4px; }
.fd-messages::-webkit-scrollbar-thumb:hover { background: rgba(201, 169, 110, 0.4); }

.fd-msg { display: flex; margin: 10px 0; align-items: flex-end; gap: 8px; animation: fd-msg-in 0.28s var(--ease-out) both; }
.fd-msg.mine { justify-content: flex-end; }
.fd-bubble {
  width: fit-content;
  max-width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.5;
  word-break: break-word;
  white-space: pre-wrap;
}
.fd-msg.mine .fd-bubble { background: rgba(201, 169, 110, 0.16); color: var(--accent); }
.fd-msg.other .fd-bubble { background: var(--card); color: var(--text); }
.fd-sys { text-align: center; color: var(--muted); font-size: 12px; margin: 12px 0; animation: fd-msg-in 0.28s var(--ease-out) both; }

@keyframes fd-msg-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fd-composer {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 10px 0 18px;
  border-top: 1px solid #1f1f1f;
}
.fd-composer .fd-input { flex: 1; border-radius: var(--radius); }
.fd-send {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-send:hover:not([disabled]) { background: var(--accent-soft); }
.fd-send:active:not([disabled]) { background: var(--accent-mid); transform: scale(0.96); }
.fd-send[disabled] { opacity: 0.4; cursor: default; }

.fd-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  padding: 6px 0;
}
.fd-toggle input { accent-color: var(--accent); }

.fd-section-title { color: var(--muted); font-size: 12px; letter-spacing: 2px; margin: 22px 0 4px; }

.fd-announcements { margin: 8px 0 4px; }
.fd-announcement { background: linear-gradient(135deg, var(--accent-soft) 0%, rgba(110,140,180,0.06) 100%); border: 1px solid var(--line-hot); border-radius: var(--radius); padding: 10px 14px; margin-bottom: 6px; position: relative; overflow: hidden; }
.fd-announcement::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--accent), transparent); }
.fd-announcement.priority-high { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }
.fd-announcement-head { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.fd-announcement-icon { font-size: 16px; }
.fd-announcement-title { font-weight: 600; font-size: 14px; color: var(--text); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fd-announcement-badge { font-size: 10px; padding: 2px 8px; border-radius: 10px; background: var(--accent); color: #000; font-weight: 600; letter-spacing: 1px; flex-shrink: 0; }
.fd-announcement-badge.notice { background: var(--accent); }
.fd-announcement-badge.update { background: #7ba3c2; color: #000; }
.fd-announcement-badge.event { background: #9ec6b0; color: #000; }
.fd-announcement-arrow { font-size: 11px; color: var(--muted); flex-shrink: 0; transition: transform .2s; }
.fd-announcement.expanded .fd-announcement-arrow { transform: rotate(180deg); }
.fd-announcement-body { display: none; margin-top: 8px; }
.fd-announcement.expanded .fd-announcement-body { display: block; }
.fd-announcement-content { font-size: 13px; line-height: 1.6; color: var(--text); word-break: break-word; }
.fd-announcement-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 8px; padding-top: 6px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
.fd-announcement-empty { text-align: center; padding: 20px; color: var(--muted); font-size: 12px; }
.fd-announcement-close { position: absolute; top: 8px; right: 8px; width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--line); background: transparent; color: var(--muted); cursor: pointer; font-size: 14px; display: flex; align-items: center; justify-content: center; }
.fd-announcement-close:hover { color: var(--text); border-color: var(--muted); }

.fd-stack > * { margin-top: 12px; }

/* 话题分类筛选 chips */
.fd-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 4px; }
.fd-chip {
  border: 1px solid var(--line);
  color: var(--muted);
  background: transparent;
  border-radius: 20px;
  font-family: inherit;
  font-size: 12px;
  padding: 5px 13px;
  cursor: pointer;
  letter-spacing: 1px;
  transition: border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-chip:hover { border-color: var(--line-hot); color: var(--accent); }
.fd-chip:active { transform: scale(0.95); }
.fd-chip.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

/* 房间卡片上的分类标签 / 主题行 */
.fd-tag {
  color: var(--accent);
  border: 1px solid rgba(201,169,110,0.5);
  border-radius: 10px;
  font-size: 11px;
  padding: 1px 8px;
  margin-left: 8px;
}
.fd-card .rtopic { color: var(--text); opacity: 0.82; font-size: 13px; margin-top: 8px; }
.fd-card .rintro { color: var(--muted); font-size: 12px; margin-top: 6px; line-height: 1.5; }
.fd-card .rfoot { color: var(--muted); font-size: 12px; margin-top: 10px; display: flex; justify-content: space-between; align-items: center; }
.fd-card.clickable {
  cursor: pointer;
  border: 1px solid transparent;
  transition: border-color var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease),
              box-shadow var(--t-mid) var(--ease);
}
.fd-card.clickable:hover {
  border-color: var(--line-hot);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}
.fd-card.clickable:active {
  border-color: var(--accent);
  transform: translateY(0) scale(0.99);
}
.fd-card.platform-topic {
  border: 1px solid rgba(201, 169, 110, 0.25);
  background: linear-gradient(135deg, rgba(201,169,110,0.06), transparent);
}
.fd-card.super-room {
  border: 1px solid rgba(255, 107, 107, 0.25);
  background: linear-gradient(135deg, rgba(255,107,107,0.06), transparent);
}
.fd-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #3a5; margin-right: 5px; vertical-align: middle; animation: fd-pulse 2s infinite; }
.fd-dot.cold { background: #444; animation: none; }

@keyframes fd-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(76, 175, 125, 0.5); }
  70%  { box-shadow: 0 0 0 5px rgba(76, 175, 125, 0); }
  100% { box-shadow: 0 0 0 0 rgba(76, 175, 125, 0); }
}

/* 广场动态流 */
.fd-feed { margin-top: 4px; }
.fd-feed-item { display: flex; gap: 10px; padding: 10px 2px; border-bottom: 1px solid #171717; }
.fd-feed-item:last-child { border-bottom: none; }
.fd-feed-ic { color: var(--accent); font-size: 13px; flex: 0 0 auto; width: 20px; text-align: center; }
.fd-feed-main { flex: 1; min-width: 0; }
.fd-feed-txt { font-size: 13px; line-height: 1.5; }
.fd-feed-time { color: var(--muted); font-size: 11px; margin-top: 3px; }

/* 聊天：发送者头像 + 昵称 */
.fd-msg .fd-avatar { width: 30px; height: 30px; line-height: 30px; font-size: 15px; }
.fd-msg.mine .fd-avatar { display: none; }
.fd-msg-body { max-width: 78%; display: flex; flex-direction: column; }
.fd-msg.mine .fd-msg-body { align-items: flex-end; }
/* 大屏 PC：气泡不要太宽，保持阅读舒适度 */
@media (min-width: 900px) {
  .fd-msg-body { max-width: 70%; }
}
.fd-msg-nick { color: var(--muted); font-size: 11px; margin: 0 4px 3px; letter-spacing: .5px; }
.fd-msg.mine .fd-msg-nick { display: none; }

/* 房间头部话题条 */
.fd-topicbar { color: var(--muted); font-size: 12px; padding: 8px 0 0; line-height: 1.5; }
.fd-topicbar b { color: var(--accent); font-weight: 500; }

/* 表单下拉 */
select.fd-input { appearance: none; -webkit-appearance: none; }

/* ===== 广场公屏实时聊天 ===== */
.fd-board {
  background: var(--card);
  border-radius: var(--radius);
  padding: 12px;
  margin-top: 10px;
}
.fd-board-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.fd-board-head .t { color: var(--accent); font-size: 13px; letter-spacing: 1px; }
.fd-board-head .h { color: var(--muted); font-size: 11px; }
.fd-board-scroll { height: 240px; overflow-y: auto; padding-right: 4px; scrollbar-width: thin; scrollbar-color: rgba(201,169,110,0.22) transparent; }
/* 大屏 PC：公屏更高，展示更多内容 */
@media (min-width: 900px) {
  .fd-board-scroll { height: 320px; }
}
.fd-board-scroll::-webkit-scrollbar { width: 4px; }
.fd-board-scroll::-webkit-scrollbar-track { background: transparent; }
.fd-board-scroll::-webkit-scrollbar-thumb { background: rgba(201, 169, 110, 0.22); border-radius: 4px; }
.fd-board-scroll::-webkit-scrollbar-thumb:hover { background: rgba(201, 169, 110, 0.4); }
.fd-pub { display: flex; gap: 8px; margin: 9px 0; align-items: flex-start; animation: fd-msg-in 0.28s var(--ease-out) both; }
.fd-pub .fd-avatar { width: 28px; height: 28px; line-height: 28px; font-size: 14px; }
.fd-pub .body { flex: 1; min-width: 0; }
.fd-pub .nick { color: var(--muted); font-size: 11px; margin-bottom: 2px; }
.fd-pub .nick .ai-tag, .ai-tag { color: var(--accent); border: 1px solid rgba(201,169,110,0.4); border-radius: 8px; font-size: 9px; padding: 0 5px; margin-left: 6px; white-space: nowrap; }
.fd-pub .say { font-size: 14px; line-height: 1.5; color: var(--text); word-break: break-word; white-space: pre-wrap; }
.fd-pub.mine { flex-direction: row-reverse; }
.fd-pub.mine .body { text-align: right; }
.fd-pub.mine .say { color: var(--accent); }
.fd-board-empty { color: var(--muted); font-size: 12px; text-align: center; padding: 20px 0; }

/* 在线陪伴名册 */
.fd-roster { display: flex; gap: 12px; overflow-x: auto; padding: 6px 0 2px; scrollbar-width: thin; scrollbar-color: rgba(201,169,110,0.35) transparent; }
.fd-roster::-webkit-scrollbar { height: 5px; }
.fd-roster::-webkit-scrollbar-track { background: transparent; }
.fd-roster::-webkit-scrollbar-thumb { background: rgba(201,169,110,0.32); border-radius: 6px; }
.fd-roster::-webkit-scrollbar-thumb:hover { background: rgba(201,169,110,0.5); }
.fd-roster-item { flex: 0 0 auto; text-align: center; width: 56px; }
.fd-roster-item .fd-avatar { width: 40px; height: 40px; line-height: 40px; font-size: 20px; margin: 0 auto; position: relative; }
.fd-roster-item .rn { color: var(--muted); font-size: 10px; margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fd-roster-ai { color: var(--accent); border: 1px solid rgba(201,169,110,0.4); border-radius: 8px; font-size: 9px; line-height: 1.4; padding: 0 3px; margin: 2px auto 0; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fd-roster-region { color: var(--accent); border: 1px solid rgba(201,169,110,0.4); border-radius: 8px; font-size: 9px; line-height: 1.4; padding: 0 3px; margin: 2px auto 0; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.fd-online-dot { position: relative; }
.fd-online-dot::after { content: ''; position: absolute; right: -1px; bottom: -1px; width: 9px; height: 9px; border-radius: 50%; background: #4caf7d; border: 2px solid var(--card); animation: fd-pulse 2s infinite; }

/* 我的资料卡 */
.fd-profile .prow { display: flex; align-items: center; gap: 12px; }
.fd-profile .pcode { font-size: 15px; color: var(--accent); letter-spacing: 1px; }
.fd-profile .pmeta { color: var(--muted); font-size: 12px; margin-top: 3px; }
.fd-kv { display: flex; justify-content: space-between; font-size: 13px; margin-top: 10px; }
.fd-kv .k { color: var(--muted); }
.fd-kv .v { color: var(--text); }
.fd-code-box { display: flex; align-items: center; justify-content: space-between; gap: 8px; background: rgba(201,169,110,0.08); border: 1px dashed rgba(201,169,110,0.5); border-radius: 12px; padding: 10px 12px; margin-top: 10px; }
.fd-code-box .code { color: var(--accent); font-size: 16px; letter-spacing: 2px; }
.fd-progress { height: 6px; background: #222; border-radius: 4px; overflow: hidden; margin-top: 8px; }
.fd-progress > i { display: block; height: 100%; background: var(--accent); }

/* 头像风格选择器 */
.fd-picker-styles { display: flex; gap: 10px; margin-top: 10px; flex-wrap: wrap; }
.fd-pick { width: 40px; height: 40px; border-radius: 50%; text-align: center; line-height: 40px; font-size: 20px; cursor: pointer; border: 2px solid transparent; transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease); -webkit-tap-highlight-color: transparent; }
.fd-pick:hover { transform: scale(1.1); }
.fd-pick:active { transform: scale(0.92); }
.fd-pick.sel { border-color: var(--accent); }
.fd-picker-glyphs { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.fd-glyph { width: 34px; height: 34px; line-height: 34px; text-align: center; border-radius: 10px; border: 1px solid var(--line); color: var(--text); cursor: pointer; font-size: 17px; transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease); -webkit-tap-highlight-color: transparent; }
.fd-glyph:hover { border-color: var(--line-hot); color: var(--accent); transform: scale(1.08); }
.fd-glyph:active { transform: scale(0.92); }
.fd-glyph.sel { border-color: var(--accent); color: var(--accent); }

/* 弹层 — 常驻 + opacity/visibility 切换，JS 的 .on 增删逻辑不变 */
.fd-modal {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--t-mid) var(--ease),
              visibility var(--t-mid) var(--ease);
}
.fd-modal.on {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}
.fd-modal-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
  transform: translateY(16px) scale(0.96);
  opacity: 0;
  transition: transform var(--t-mid) var(--ease-out),
              opacity var(--t-mid) var(--ease);
}
/* 平板 / 小屏 PC：弹层略宽 */
@media (min-width: 480px) {
  .fd-modal-card { max-width: 420px; padding: 24px; }
}
/* 大屏 PC：弹层更宽更舒适 */
@media (min-width: 900px) {
  .fd-modal-card { max-width: 480px; padding: 28px; }
}
.fd-modal.on .fd-modal-card {
  transform: translateY(0) scale(1);
  opacity: 1;
}
.fd-modal-card h3 { color: var(--accent); font-weight: 500; margin: 0 0 4px; font-size: 16px; }

/* ==================== 🌐 翻译中心 ==================== */
@keyframes fd-fade-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.fd-tr-hub .fd-tr-hub-card {
  background: var(--card);
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 12px 48px rgba(0,0,0,0.6);
  transform: translateY(16px) scale(0.96);
  opacity: 0;
  transition: transform var(--t-mid) var(--ease-out), opacity var(--t-mid) var(--ease);
}
.fd-tr-hub.on .fd-tr-hub-card { transform: translateY(0) scale(1); opacity: 1; }
.fd-tr-topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px 8px; flex-shrink: 0;
}
.fd-tr-title { font-size: 16px; font-weight: 600; color: var(--accent); }
.fd-tr-close {
  background: rgba(0,0,0,0.3); border: 1px solid var(--border); border-radius: 50%;
  width: 28px; height: 28px; color: var(--text); font-size: 12px; cursor: pointer;
  display: flex; align-items: center; justify-content: center; transition: all 0.2s;
}
.fd-tr-close:hover { background: rgba(201,169,110,0.15); }
.fd-tr-tabs {
  display: flex; gap: 2px; padding: 0 10px 8px; flex-shrink: 0;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.fd-tr-tab {
  flex-shrink: 0; padding: 6px 10px; font-size: 12px;
  background: transparent; border: 1px solid transparent; border-radius: 8px;
  color: var(--muted); cursor: pointer; white-space: nowrap; transition: all 0.2s;
}
.fd-tr-tab.on { background: rgba(201,169,110,0.12); color: var(--accent); border-color: rgba(201,169,110,0.25); }
.fd-tr-langbar {
  display: flex; gap: 6px; padding: 0 16px 10px; align-items: center; flex-shrink: 0;
}
.fd-tr-sel {
  flex: 1; padding: 7px 8px; background: rgba(0,0,0,0.3); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 13px; min-width: 0;
}
.fd-tr-swap {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%;
  background: rgba(201,169,110,0.1); border: 1px solid rgba(201,169,110,0.2);
  color: var(--accent); font-size: 14px; cursor: pointer; transition: all 0.2s;
}
.fd-tr-swap:hover { background: rgba(201,169,110,0.2); transform: rotate(180deg); }
.fd-tr-body { flex: 1; overflow-y: auto; padding: 0 16px 16px; -webkit-overflow-scrolling: touch; }
.fd-tr-panel { display: none; }
.fd-tr-panel.on { display: block; animation: fd-fade-in 0.3s var(--ease); }
.fd-tr-input {
  width: 100%; padding: 10px; background: rgba(0,0,0,0.3); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 13px; resize: none; box-sizing: border-box;
  margin-bottom: 10px; font-family: inherit;
}
.fd-tr-input:focus { border-color: rgba(201,169,110,0.4); outline: none; }
.fd-tr-engines { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.fd-tr-engine {
  background: rgba(201,169,110,0.04); border: 1px solid var(--border);
  border-radius: 8px; overflow: hidden;
}
.fd-tr-engine-head {
  display: flex; align-items: center; gap: 4px; padding: 6px 8px;
  background: rgba(0,0,0,0.2); border-bottom: 1px solid var(--border);
}
.fd-tr-engine-name { font-size: 12px; color: var(--accent); flex: 1; }
.fd-tr-engine-btn {
  width: 24px; height: 24px; border: none; background: transparent;
  color: var(--muted); font-size: 12px; cursor: pointer; border-radius: 4px; transition: all 0.2s;
}
.fd-tr-engine-btn:hover { background: rgba(201,169,110,0.15); color: var(--accent); }
.fd-tr-engine-out {
  padding: 8px 10px; font-size: 14px; line-height: 1.6; color: var(--text);
  white-space: pre-wrap; word-break: break-word; min-height: 36px;
}
.fd-tr-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.fd-tr-actions .fd-btn { flex: 1; min-width: 0; }

/* 🎙️ 语音翻译 */
.fd-tr-voice-area { text-align: center; padding: 20px 0; }
.fd-tr-mic {
  width: 64px; height: 64px; border-radius: 50%; border: 2px solid rgba(201,169,110,0.3);
  background: rgba(201,169,110,0.08); color: var(--accent); font-size: 28px;
  cursor: pointer; transition: all 0.3s; display: inline-flex; align-items: center; justify-content: center;
}
.fd-tr-mic.recording { background: rgba(220,60,60,0.2); border-color: rgba(220,60,60,0.5); animation: fd-tr-pulse 1.5s infinite; }
@keyframes fd-tr-pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(220,60,60,0.3); } 50% { box-shadow: 0 0 0 12px rgba(220,60,60,0); } }
.fd-tr-voice-text { margin-top: 12px; font-size: 14px; color: var(--muted); min-height: 20px; }
.fd-tr-voice-out {
  margin-top: 12px; padding: 12px; background: rgba(201,169,110,0.06); border: 1px solid var(--border);
  border-radius: 8px; font-size: 15px; line-height: 1.6; color: var(--text); min-height: 44px;
  white-space: pre-wrap; word-break: break-word;
}

/* 📒 常用语 */
.fd-tr-phrase-cats { display: flex; gap: 4px; margin-bottom: 10px; flex-wrap: wrap; }
.fd-tr-phrase-cat {
  padding: 4px 10px; font-size: 12px; border: 1px solid var(--border); border-radius: 6px;
  background: transparent; color: var(--muted); cursor: pointer; transition: all 0.2s;
}
.fd-tr-phrase-cat.on { background: rgba(201,169,110,0.12); color: var(--accent); border-color: rgba(201,169,110,0.25); }
.fd-tr-phrase-list { display: flex; flex-direction: column; gap: 6px; }
.fd-tr-phrase-item {
  display: flex; align-items: center; gap: 8px; padding: 8px 10px;
  background: rgba(0,0,0,0.2); border: 1px solid var(--border); border-radius: 8px;
  transition: all 0.2s;
}
.fd-tr-phrase-item:hover { border-color: rgba(201,169,110,0.3); background: rgba(201,169,110,0.05); }
.fd-tr-phrase-text { flex: 1; font-size: 13px; color: var(--text); }
.fd-tr-phrase-go {
  flex-shrink: 0; padding: 4px 8px; font-size: 12px; border: 1px solid rgba(201,169,110,0.2);
  border-radius: 6px; background: rgba(201,169,110,0.08); color: var(--accent); cursor: pointer;
}

/* 🌍 多语同译 */
.fd-tr-multi-langs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 8px; }
.fd-tr-multi-chip {
  padding: 4px 8px; font-size: 12px; border: 1px solid var(--border); border-radius: 6px;
  background: transparent; color: var(--muted); cursor: pointer; transition: all 0.2s;
}
.fd-tr-multi-chip.on { background: rgba(201,169,110,0.12); color: var(--accent); border-color: rgba(201,169,110,0.25); }
.fd-tr-multi-results { margin-top: 10px; }
.fd-tr-multi-result {
  padding: 8px 10px; background: rgba(201,169,110,0.04); border: 1px solid var(--border);
  border-radius: 8px; margin-bottom: 6px;
}
.fd-tr-multi-result-head { display: flex; align-items: center; gap: 4px; margin-bottom: 4px; }
.fd-tr-multi-result-lang { flex: 1; font-size: 12px; color: var(--accent); }
.fd-tr-multi-result-text { font-size: 14px; color: var(--text); line-height: 1.5; }

/* 📜 历史 */
.fd-tr-history-list { display: flex; flex-direction: column; gap: 6px; }
.fd-tr-history-item {
  padding: 8px 10px; background: rgba(0,0,0,0.2); border: 1px solid var(--border);
  border-radius: 8px; cursor: pointer; transition: all 0.2s;
}
.fd-tr-history-item:hover { border-color: rgba(201,169,110,0.3); background: rgba(201,169,110,0.05); }
.fd-tr-history-src { font-size: 13px; color: var(--muted); margin-bottom: 2px; }
.fd-tr-history-dst { font-size: 14px; color: var(--text); line-height: 1.4; }
.fd-tr-history-meta { font-size: 11px; color: var(--muted); margin-top: 2px; }

@media (min-width: 480px) { .fd-tr-hub-card { max-width: 480px; } }
@media (min-width: 900px) { .fd-tr-hub-card { max-width: 560px; } }

/* 微信式底部标签栏 */
.fd-tab-panel { display: none; }
.fd-tab-panel.on { display: block; }
.fd-tabbar {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 0;
  width: 100%; max-width: 100%; display: flex; z-index: 900;
  background: rgba(20,20,20,0.96); border-top: 1px solid rgba(201,169,110,0.18);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
/* 平板 / 小屏 PC：tabbar 跟随内容宽度 */
@media (min-width: 480px) {
  .fd-tabbar { max-width: 560px; }
}
/* 大屏 PC：tabbar 跟随内容宽度 */
@media (min-width: 900px) {
  .fd-tabbar { max-width: 680px; }
}
.fd-tabbar-btn {
  flex: 1; background: transparent; border: none; color: var(--muted);
  font-family: inherit; font-size: 12px; letter-spacing: 2px;
  padding: 11px 0 13px; cursor: pointer; position: relative;
  transition: color var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-tabbar-btn:active { color: var(--accent); }
.fd-tabbar-btn.active { color: var(--accent); }
/* 指示器常驻，scaleX 切换实现从中心展开动画 */
.fd-tabbar-btn::after {
  content: ''; position: absolute; top: 0; left: 50%;
  width: 22px; height: 2px; border-radius: 2px; background: var(--accent);
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform var(--t-mid) var(--ease-out);
}
.fd-tabbar-btn.active::after {
  transform: translateX(-50%) scaleX(1);
}
.fd-tabbar-btn .tb-badge {
  position: absolute; top: 6px; left: calc(50% + 8px);
  min-width: 15px; height: 15px; line-height: 15px; padding: 0 4px;
  border-radius: 8px; background: #c96e6e; color: #fff; font-size: 10px; text-align: center;
}
.fd-tabbar-btn .tb-dot {
  position: absolute; top: 8px; right: calc(50% - 18px);
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
  display: none;
}
.fd-tabbar-btn.has-dot .tb-dot { display: block; }

/* 岛上心事角：创新入口卡片 */
.fd-nook { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.fd-nook-item { background: var(--card); border: 1px solid #262626; border-radius: 14px; padding: 12px 12px; cursor: pointer; transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease); -webkit-tap-highlight-color: transparent; }
.fd-nook-item:hover { border-color: var(--line-hot); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.fd-nook-item:active { transform: translateY(0) scale(0.98); }
.fd-nook-item .ic { font-size: 20px; }
.fd-nook-item .t { color: var(--text); font-size: 14px; margin-top: 4px; letter-spacing: .5px; }
.fd-nook-item .d { color: var(--muted); font-size: 11px; margin-top: 2px; line-height: 1.5; }
/* 情绪日历格 */
.fd-mood-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.fd-mood-cell { aspect-ratio: 1; border-radius: 8px; background: rgba(255,255,255,0.03); display: flex; align-items: center; justify-content: center; font-size: 16px; }

/* 私聊邀请角标 */
.fd-badge.dot { background: #c96e6e; color: #fff; border-color: #c96e6e; }

/* 表情包按钮与选择器 */
.fd-emoji-btn {
  background: transparent;
  border: none;
  font-size: 24px;
  cursor: pointer;
  padding: 0 6px;
  flex: 0 0 auto;
  border-radius: 10px;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-emoji-btn:hover { background: var(--accent-soft); transform: scale(1.12); }
.fd-emoji-btn:active { transform: scale(0.92); }

/* 文件按钮（与表情按钮风格一致） */
.fd-file-btn {
  background: transparent;
  border: none;
  font-size: 22px;
  cursor: pointer;
  padding: 0 6px;
  flex: 0 0 auto;
  border-radius: 10px;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-file-btn:hover { background: var(--accent-soft); transform: scale(1.12); }
.fd-file-btn:active { transform: scale(0.92); }

.fd-emoji-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 6px;
  max-height: 42vh;
  overflow-y: auto;
}
.fd-emoji-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(201,169,110,0.2);
  border-radius: 10px;
  font-size: 22px;
  padding: 6px 0;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.fd-emoji-item:hover {
  background: var(--accent-soft);
  border-color: var(--line-hot);
  transform: scale(1.15);
}
.fd-emoji-item:active { transform: scale(0.9); }

/* 语言面板展开动画 */
#myLangPanel {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--t-mid) var(--ease),
              opacity var(--t-mid) var(--ease),
              margin-top var(--t-mid) var(--ease);
  margin-top: 0 !important;
}
#myLangPanel.open {
  max-height: 400px;
  opacity: 1;
  margin-top: 10px !important;
}

/* ===== 全局 Toast ===== */
.fd-toast-wrap {
  position: fixed;
  top: env(safe-area-inset-top, 0px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
  width: 100%;
  max-width: 100%;
  padding: 16px;
  box-sizing: border-box;
}
/* 平板 / 小屏 PC：toast 跟随内容宽度 */
@media (min-width: 480px) {
  .fd-toast-wrap { max-width: 560px; }
}
/* 大屏 PC：toast 跟随内容宽度 */
@media (min-width: 900px) {
  .fd-toast-wrap { max-width: 680px; }
}
.fd-toast {
  background: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--line-hot);
  color: var(--accent);
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 13px;
  letter-spacing: 1px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity var(--t-mid) var(--ease),
              transform var(--t-mid) var(--ease-out);
  max-width: 100%;
  text-align: center;
}
.fd-toast.show { opacity: 1; transform: translateY(0); }
.fd-toast.success { border-color: rgba(120, 180, 140, 0.5); color: #9ec6b0; }
.fd-toast.error { border-color: rgba(201, 110, 110, 0.5); color: #e0a6a6; }

/* ===== Loading 旋转 ===== */
.fd-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 1.5px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: fd-spin 0.7s linear infinite;
  vertical-align: middle;
}
@keyframes fd-spin { to { transform: rotate(360deg); } }

/* 按钮内 loading 态：文字隐藏，旋转显示 */
.fd-btn.is-loading, .fd-send.is-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.fd-btn.is-loading::after, .fd-send.is-loading::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 14px; height: 14px;
  margin: -7px 0 0 -7px;
  border: 1.5px solid var(--accent-soft);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: fd-spin 0.7s linear infinite;
}

/* ============================================================
   ===== 移动端多机型深度适配（Mobile Compatibility） =====
   ============================================================ */

/* ---- 1. 安全区全面适配（刘海屏 / 灵动岛 / Home 指示条） ---- */
:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

/* 顶部 header 安全区：避开刘海/灵动岛 */
.fd-header {
  padding-top: calc(12px + var(--safe-top));
}

/* 底部 tabbar 安全区 */
.fd-tabbar {
  padding-bottom: calc(8px + var(--safe-bottom));
}

/* 带 tabbar 的页面内容底部留白 */
.fd-app.fd-has-tabbar {
  padding-bottom: calc(56px + var(--safe-bottom));
}

/* 输入框/发送栏 避开底部安全区 */
.fd-composer {
  padding-bottom: calc(10px + var(--safe-bottom));
}

/* 弹层避开顶部安全区 */
.fd-modal {
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
}

/* Toast 避开顶部安全区 */
.fd-toast-wrap {
  top: calc(8px + var(--safe-top));
}

/* ---- 2. 小屏手机适配（< 375px，如 iPhone SE / 旧安卓小屏） ---- */
@media (max-width: 374px) {
  .fd-app { padding: 0 12px; }
  .fd-header { padding-top: calc(8px + var(--safe-top)); padding-bottom: 10px; }
  .fd-header .name { font-size: 15px; }
  .fd-header .sub { font-size: 11px; }
  .fd-card { padding: 12px; margin-top: 10px; border-radius: 14px; }
  .fd-btn { font-size: 14px; padding: 11px 14px; letter-spacing: 3px; }
  .fd-input { font-size: 16px; padding: 10px 12px; }
  .fd-section-title { font-size: 11px; margin: 18px 0 4px; }
  .fd-bubble { font-size: 14px; padding: 8px 12px; }
  .fd-msg .fd-avatar { width: 28px; height: 28px; line-height: 28px; font-size: 14px; }
  .fd-roster-item { width: 48px; }
  .fd-roster-item .fd-avatar { width: 34px; height: 34px; line-height: 34px; font-size: 16px; }
  .fd-profile .pcode { font-size: 14px; }
  .fd-code-box .code { font-size: 14px; letter-spacing: 1px; }
  .fd-tabbar-btn { font-size: 11px; padding: 10px 0 12px; }
  .fd-board-scroll { height: 200px; }
  .fd-pub .say { font-size: 13px; }
}

/* ---- 3. 大屏手机适配（> 430px，如 Pro Max / 大屏安卓） ---- */
@media (min-width: 430px) and (max-width: 479px) {
  .fd-app { padding: 0 20px; }
  .fd-card { padding: 18px; border-radius: 18px; }
  .fd-bubble { font-size: 15px; padding: 11px 16px; }
  .fd-input { font-size: 15px; padding: 15px 18px; }
  .fd-btn { font-size: 15px; padding: 14px 18px; }
  .fd-header .name { font-size: 18px; }
  .fd-board-scroll { height: 280px; }
}

/* ---- 4. iOS 体验优化 ---- */
/* 防止 iOS 输入框聚焦时自动缩放（保持 16px 以下触发缩放，这里表单输入框统一 16px） */
.fd-input, .fd-send, select.fd-input, textarea.fd-input {
  font-size: 16px;
}

/* iOS 滚动惯性 + 回弹效果 */
.fd-messages, .fd-board-scroll, .fd-roster,
.fd-modal-card, .fd-emoji-grid, .hand-cards {
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

/* 去除 iOS 点击高亮/长按选择 */
.fd-btn, .fd-chip, .fd-tabbar-btn, .fd-emoji-btn,
.fd-file-btn, .fd-pick, .fd-glyph, .fd-nook-item,
.fd-card.clickable, .fd-emoji-item, .card {
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

/* 允许文本区域选择（聊天/公屏内容） */
.fd-bubble, .fd-pub .say, .fd-feed-txt {
  -webkit-touch-callout: default;
  user-select: text;
}

/* 按钮点击态视觉反馈（替代系统高亮） */
.fd-btn:active:not([disabled]),
.fd-chip:active,
.fd-tabbar-btn:active,
.fd-card.clickable:active {
  transform: scale(0.98);
  transition: transform 0.1s;
}

/* ---- 5. 深色模式防反色（Android 强制深色模式 / iOS Smart Invert） ---- */
@media (prefers-color-scheme: dark) {
  :root { color-scheme: light; }
  html, body {
    background: var(--bg);
    color: var(--text);
    color-scheme: light;
    forced-color-adjust: none;
  }
}

/* ---- 6. backdrop-filter 降级（旧安卓 / 鸿蒙 / 低端机） ---- */
.fd-tabbar {
  background: rgba(15, 15, 15, 0.98);
}
.fd-toast {
  background: rgba(20, 20, 20, 0.98);
}
.fd-modal {
  background: rgba(0, 0, 0, 0.75);
}

@supports (backdrop-filter: blur(8px)) or (-webkit-backdrop-filter: blur(8px)) {
  .fd-tabbar {
    background: rgba(20, 20, 20, 0.92);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
  .fd-toast {
    background: rgba(26, 26, 26, 0.92);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
  }
  .fd-modal {
    background: rgba(0, 0, 0, 0.6);
    -webkit-backdrop-filter: blur(4px);
    backdrop-filter: blur(4px);
  }
}

/* ---- 7. 横竖屏适配 ---- */
/* 横屏模式：内容区更宽，调整布局比例 */
@media (orientation: landscape) and (max-height: 500px) {
  .fd-app {
    max-width: 720px;
    padding: 0 24px;
  }
  .fd-header {
    padding-top: calc(6px + var(--safe-top));
    padding-bottom: 8px;
  }
  .fd-header .name { font-size: 15px; }
  .fd-header .sub { display: none; }
  .fd-board-scroll { height: 160px; }
  .fd-tabbar-btn { padding: 8px 0 10px; font-size: 11px; }
  .fd-app.fd-has-tabbar {
    padding-bottom: calc(48px + var(--safe-bottom));
  }
  /* 横屏下聊天界面更紧凑 */
  .fd-messages { padding: 8px 0 4px; }
  .fd-msg { margin: 6px 0; }
  .fd-composer { padding: 6px 0 calc(6px + var(--safe-bottom)); }
}

/* ---- 8. 高刷屏幕动画流畅度提升 ---- */
@media (prefers-reduced-motion: no-preference) {
  .fd-btn, .fd-chip, .fd-tabbar-btn, .fd-card, .fd-bubble,
  .fd-modal-card, .fd-toast, .fd-emoji-item, .card {
    will-change: transform;
  }
}

/* 减少动效模式（系统设置开启） */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- 9. 极低屏占比/超窄屏兜底 ---- */
@media (max-width: 320px) {
  .fd-app { padding: 0 10px; }
  .fd-btn { letter-spacing: 2px; padding: 10px 12px; }
  .fd-card { padding: 10px; }
  .fd-nook { grid-template-columns: 1fr; }
}

/* ---- 10. 骨架屏 Skeleton ---- */
.fd-skeleton {
  background: linear-gradient(90deg, var(--card) 25%, rgba(255,255,255,0.05) 50%, var(--card) 75%);
  background-size: 200% 100%;
  animation: fd-skeleton-loading 1.4s ease-in-out infinite;
  border-radius: 8px;
}
@keyframes fd-skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ---- 11. 精选低语样式 ---- */
.fd-featured-bubble {
  border: 1px solid var(--accent-mid);
  background: linear-gradient(135deg, var(--accent-soft) 0%, transparent 100%);
  position: relative;
}
.fd-featured-bubble::before {
  content: '⭐';
  position: absolute;
  top: -8px;
  right: -8px;
  font-size: 12px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* ---- 12. 好友系统样式 ---- */
.fd-friend-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  transition: background var(--t-fast) var(--ease);
}
.fd-friend-item:hover { background: rgba(255,255,255,0.04); }
.fd-friend-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--accent-mid);
  flex-shrink: 0;
}
.fd-friend-info { flex: 1; min-width: 0; }
.fd-friend-name { font-weight: 500; font-size: 14px; }
.fd-friend-meta { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ---- 13. 成就徽章样式 ---- */
.fd-achievement {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14px 8px;
  border-radius: 12px;
  text-align: center;
  transition: transform var(--t-fast) var(--ease);
}
.fd-achievement.earned {
  background: var(--accent-soft);
  border: 1px solid var(--accent-mid);
}
.fd-achievement:not(.earned) {
  opacity: 0.45;
  filter: grayscale(1);
}
.fd-achievement:hover { transform: translateY(-2px); }
.fd-achievement-icon { font-size: 28px; margin-bottom: 6px; }
.fd-achievement-name { font-size: 12px; font-weight: 500; }
.fd-achievement-desc { font-size: 10px; color: var(--muted); margin-top: 2px; }

/* ---- 14. 通知铃铛 ---- */
.fd-notif-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  background: #E74C3C;
  color: #fff;
  font-size: 10px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

/* ---- 15. 消息状态指示器 ---- */
.fd-msg-status {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  font-size: 10px;
  color: var(--muted);
  margin-left: 6px;
}
.fd-msg-status::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  animation: fd-pulse 1s ease-in-out infinite;
}
@keyframes fd-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}