/* 这个文件负责“长什么样”——颜色、字体、大小、排版。 */

/* ===== 配色总控（多巴胺风：克莱因蓝 + 橙红 + 白 + 一点亮黄） ===== */
:root {
  --bg: #fdf9f0;             /* 奶白暖底（不是整片蓝！） */
  --surface: #ffffff;        /* 卡片：白 */
  --surface-2: #f6f1e6;      /* 次级块 */
  --border: #ece3d2;         /* 描边 */
  --ink: #1d2647;            /* 主文字：深蓝墨 */
  --ink-dim: #7c8398;        /* 次要文字：蓝灰 */
  --klein: #1b34d6;          /* 克莱因蓝 */
  --klein-press: #1428ac;
  --orange: #ff5a34;         /* 橙红 */
  --orange-press: #ec4620;
  --yellow: #ffcf33;         /* 亮黄 */
  --danger: #ff4d4f;
  --overlay: rgba(24, 30, 58, 0.42);
}

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

html { background: var(--bg); }

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

::placeholder { color: var(--ink-dim); opacity: 0.7; }

/* ===== 屏幕切换 ===== */
.screen {
  display: none;
  min-height: 100vh;
  flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right)
           env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.screen[data-active="true"] { display: flex; }

/* ===== 密码页 / 学号页 共用 ===== */
#screen-lock,
#screen-id {
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}
/* 背景上几团柔和的彩色光斑，让画面活起来（多巴胺） */
#screen-lock::before,
#screen-id::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(closest-side, rgba(27, 52, 214, 0.16), transparent) -8% -6% / 62% 52% no-repeat,
    radial-gradient(closest-side, rgba(255, 90, 52, 0.14), transparent) 112% 14% / 58% 48% no-repeat,
    radial-gradient(closest-side, rgba(255, 207, 51, 0.20), transparent) 82% 114% / 64% 52% no-repeat;
}
.lock-box { position: relative; z-index: 1; width: 100%; max-width: 360px; padding: 24px; }

/* 右下角：求助入口（可堆两行） */
.help-corner {
  position: absolute;
  right: 16px;
  bottom: 22px;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}
.help-fab {
  padding: 9px 16px;
  font-size: 13px;
  color: var(--klein);
  background: #fff;
  border: 1.5px solid var(--klein);
  border-radius: 20px;
  cursor: pointer;
  box-shadow: 0 3px 12px rgba(27, 52, 214, 0.16);
}
.help-fab:active { transform: scale(0.97); }
.help-seen-link {
  font-size: 12.5px;
  color: var(--ink-dim);
  background: transparent;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}

/* ===== 弹窗（求助 / 夸奖 / 查看回复） ===== */
.help-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay);
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 40;
}
.help-overlay.open { display: flex; }
.help-card {
  width: 100%;
  max-width: 360px;
  max-height: 88vh;
  overflow-y: auto;
  padding: 24px;
  background: var(--surface);
  border-radius: 18px;
  text-align: center;
  box-shadow: 0 18px 50px rgba(24, 30, 58, 0.28);
}
.help-title { font-size: 20px; font-weight: 800; color: var(--klein); }
.help-desc { margin: 12px 0 16px; font-size: 13.5px; line-height: 1.8; color: var(--ink-dim); text-align: left; }
.help-desc b { color: var(--orange); }
.help-textarea {
  width: 100%;
  min-height: 92px;
  margin-top: 12px;
  padding: 12px 14px;
  font-size: 15px;
  line-height: 1.6;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  outline: none;
  resize: vertical;
  font-family: inherit;
}
.help-textarea:focus { border-color: var(--klein); }

/* ===== 密码页正文 ===== */
/* “终于等到你！” —— 蹦一下，感叹号还会摇摆 */
.greeting {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--klein);
  animation: pop-bounce 0.7s cubic-bezier(0.2, 1.3, 0.4, 1);
}
.greeting .ex { color: var(--orange); display: inline-block; animation: wiggle 1.3s ease-in-out infinite; }
@keyframes pop-bounce {
  0% { opacity: 0; transform: translateY(16px) scale(0.9); }
  60% { transform: translateY(-4px) scale(1.03); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes wiggle {
  0%, 100% { transform: rotate(0); }
  25% { transform: rotate(-14deg); }
  75% { transform: rotate(14deg); }
}

/* 密码提示：淡蓝便签 */
.hint {
  margin-top: 22px;
  padding: 14px 16px;
  font-size: 13.5px;
  line-height: 1.9;
  text-align: left;
  color: var(--ink);
  background: rgba(27, 52, 214, 0.06);
  border: 1.5px solid rgba(27, 52, 214, 0.18);
  border-radius: 14px;
}
.hint b { color: var(--klein); }

.id-title { font-size: 24px; font-weight: 800; letter-spacing: 1px; color: var(--klein); position: relative; z-index: 1; }

/* 学号页提示：淡橙便签 */
.tips {
  margin-top: 20px;
  padding: 14px 16px;
  font-size: 13.5px;
  line-height: 1.9;
  text-align: left;
  color: var(--ink);
  background: rgba(255, 90, 52, 0.09);
  border: 1.5px solid rgba(255, 90, 52, 0.28);
  border-radius: 14px;
}
.tips b { color: var(--orange); }

/* ===== 输入框 + 按钮 ===== */
.lock-form { margin-top: 22px; }
.lock-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 16px;
  text-align: center;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  outline: none;
}
.lock-input:focus { border-color: var(--klein); }

.btn-primary {
  width: 100%;
  margin-top: 14px;
  padding: 14px;
  font-size: 16px;
  letter-spacing: 4px;
  color: #fff;
  background: var(--orange);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(255, 90, 52, 0.28);
  transition: transform 0.06s;
}
.btn-primary:active { background: var(--orange-press); transform: scale(0.98); }

.lock-error { margin-top: 14px; min-height: 20px; font-size: 14px; color: var(--danger); }

.btn-link {
  margin-top: 18px;
  font-size: 14px;
  color: var(--klein);
  background: transparent;
  border: none;
  cursor: pointer;
  text-decoration: underline;
}

/* ===== 模式页通用 ===== */
.mode-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 2px solid var(--klein);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 5;
}
.mode-name { font-size: 18px; font-weight: 800; color: var(--klein); }
.btn-back {
  padding: 6px 14px;
  font-size: 14px;
  color: var(--orange);
  background: transparent;
  border: 1.5px solid var(--orange);
  border-radius: 20px;
  cursor: pointer;
}

.mode-main { flex: 1; padding: 20px; }

/* ===== 图片墙（暂留） ===== */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.gallery img { width: 100%; border-radius: 10px; display: block; }
.empty-state { grid-column: 1 / -1; text-align: center; color: var(--ink-dim); padding: 60px 20px; font-size: 15px; }
.placeholder { color: var(--ink-dim); text-align: center; padding: 60px 20px; }

/* ===== 翻页册子 ===== */
.booklet { position: relative; flex: 1; display: flex; align-items: center; justify-content: center; padding: 16px; min-height: 0; }
.page-stage { width: 100%; max-width: 520px; display: flex; align-items: center; justify-content: center; }
.book-page, .book-cover, .book-blank { width: 100%; border-radius: 8px; box-shadow: 0 10px 34px rgba(24, 30, 58, 0.22); overflow: hidden; }
.book-page img { width: 100%; display: block; max-height: 76vh; object-fit: contain; }
.book-blank {
  aspect-ratio: 1240 / 1860;
  background: #fffdf7;
  display: flex; align-items: center; justify-content: center;
  color: #b6ab97; font-size: 15px; text-align: center; padding: 20px;
}
/* 封面：藏青 + 金框金字（书本身走沉稳路线，和app的活泼形成对比） */
.book-cover {
  aspect-ratio: 1240 / 1860;
  background: linear-gradient(160deg, #16305a 0%, #0d1c38 100%);
  border: 2px solid var(--yellow);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 24px;
  box-shadow: 0 12px 40px rgba(24, 30, 58, 0.4), inset 0 0 0 6px rgba(255, 207, 51, 0.14);
}
.cover-kicker { color: var(--yellow); font-size: 14px; letter-spacing: 3px; opacity: 0.9; }
.cover-title { margin: 18px 0; color: var(--yellow); font-size: 34px; font-weight: 800; letter-spacing: 3px; line-height: 1.4; text-shadow: 0 2px 16px rgba(255, 207, 51, 0.35); }
.cover-rule { width: 54px; height: 2px; background: var(--yellow); opacity: 0.75; margin: 8px 0 18px; }
.cover-warn { color: var(--yellow); font-size: 17px; letter-spacing: 2px; }

.page-arrow {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; line-height: 1;
  color: #fff; background: var(--klein);
  border: none; border-radius: 50%; cursor: pointer; z-index: 2;
  box-shadow: 0 4px 14px rgba(27, 52, 214, 0.35);
}
.page-arrow.left { left: 8px; }
.page-arrow.right { right: 8px; }
.page-arrow:active { transform: translateY(-50%) scale(0.92); }
.page-arrow:disabled { opacity: 0.22; cursor: default; box-shadow: none; }
.page-indicator { text-align: center; padding: 6px 0 14px; color: var(--ink-dim); font-size: 13px; }

/* ===== 管理员后台 ===== */
.admin-tabs {
  display: flex; gap: 8px; padding: 12px 16px; overflow-x: auto;
  border-bottom: 1px solid var(--border); background: var(--surface);
  position: sticky; top: 57px; z-index: 5; -webkit-overflow-scrolling: touch;
}
.admin-tab {
  flex: 0 0 auto; padding: 8px 14px; font-size: 14px; white-space: nowrap;
  color: var(--ink-dim); background: #fff; border: 1.5px solid var(--border);
  border-radius: 20px; cursor: pointer;
}
.admin-tab.active { color: #fff; background: var(--klein); border-color: var(--klein); }

.admin-main { padding-top: 16px; }
.admin-panel { display: none; }
.admin-panel.active { display: block; }
.panel-title { font-size: 20px; font-weight: 800; color: var(--klein); }
.panel-note { margin: 8px 0 14px; font-size: 13.5px; line-height: 1.7; color: var(--ink-dim); }

.backend-badge {
  display: inline-block; margin-bottom: 14px; padding: 6px 12px; font-size: 12.5px;
  color: #9a6b00; background: rgba(255, 207, 51, 0.18); border: 1px solid rgba(255, 207, 51, 0.5); border-radius: 8px;
}

.admin-list { display: flex; flex-direction: column; gap: 12px; }
.card { padding: 14px 16px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 2px 10px rgba(24, 30, 58, 0.05); }
.card-head { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 6px; }
.card-who { font-weight: 700; font-size: 15px; color: var(--ink); }
.src-tag { font-size: 11px; font-weight: 600; padding: 2px 7px; border-radius: 6px; white-space: nowrap; }
.src-help { color: var(--klein); background: rgba(27, 52, 214, 0.1); }
.src-page { color: var(--orange); background: rgba(255, 90, 52, 0.12); }
.card-time { font-size: 12px; color: var(--ink-dim); white-space: nowrap; }
.card-body { font-size: 14.5px; line-height: 1.7; word-break: break-word; color: var(--ink); }

.reply-row { display: flex; gap: 8px; margin-top: 10px; }
.reply-row input {
  flex: 1; padding: 9px 12px; font-size: 15px; border: 1.5px solid var(--border);
  border-radius: 10px; background: #fff; color: var(--ink); outline: none;
}
.reply-row input:focus { border-color: var(--klein); }
.reply-row button {
  flex: 0 0 auto; padding: 9px 14px; font-size: 14px; color: #fff;
  background: var(--klein); border: none; border-radius: 10px; cursor: pointer;
}
/* 一条对话气泡：管理员靠蓝、同学靠橙 */
.reply-item { margin-top: 8px; padding: 8px 12px; font-size: 13.5px; line-height: 1.6; border-radius: 10px; text-align: left; }
.reply-item.from-admin { background: rgba(27, 52, 214, 0.08); }
.reply-item.from-student { background: rgba(255, 90, 52, 0.09); }
.reply-item b { color: var(--klein); }
.reply-item.from-student b { color: var(--orange); }

.upload-box {
  display: flex; align-items: center; justify-content: center; height: 90px; margin-bottom: 14px;
  color: var(--ink-dim); font-size: 15px; background: #fff; border: 2px dashed var(--border); border-radius: 12px; cursor: pointer;
}
.upload-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.upload-preview img { width: 100%; border-radius: 8px; display: block; }
.admin-empty { text-align: center; color: var(--ink-dim); padding: 40px 20px; font-size: 14px; }

/* 查看回复弹窗里的对话串 */
.seen-thread { text-align: left; margin-top: 6px; }

/* ===== 背景音乐开关 ===== */
.music-btn {
  position: fixed; left: 16px; bottom: calc(16px + env(safe-area-inset-bottom));
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--ink); background: #fff; border: 1.5px solid var(--border);
  border-radius: 50%; cursor: pointer; z-index: 30; box-shadow: 0 3px 12px rgba(24, 30, 58, 0.18);
}
.music-btn:active { transform: scale(0.94); }

/* ===== 规则说明页（像一张贴着胶带的便签） ===== */
#screen-rules { align-items: center; justify-content: center; padding: 20px; position: relative; overflow: hidden; }
#screen-rules::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(closest-side, rgba(27, 52, 214, 0.14), transparent) 0% 0% / 60% 50% no-repeat,
    radial-gradient(closest-side, rgba(255, 207, 51, 0.20), transparent) 100% 100% / 60% 50% no-repeat;
}
.rules-card {
  position: relative; z-index: 1;
  width: 100%; max-width: 400px;
  background: #fff; border-radius: 16px; padding: 26px 22px 22px;
  box-shadow: 0 16px 44px rgba(24, 30, 58, 0.18);
  transform: rotate(-0.6deg);
}
.rules-tape {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%) rotate(-3deg);
  width: 110px; height: 24px; background: rgba(255, 207, 51, 0.55);
  border: 1px dashed rgba(154, 107, 0, 0.35);
}
.rules-hi { font-family: "STKaiti", "KaiTi", "楷体", serif; font-size: 24px; color: var(--klein); }
.rules-sub { margin-top: 6px; font-size: 14px; color: var(--ink-dim); }
.rules-list { margin: 18px 0; display: flex; flex-direction: column; gap: 12px; }
.rule { display: flex; gap: 10px; font-size: 14.5px; line-height: 1.6; text-align: left; }
.rule-emo { flex: 0 0 auto; font-size: 20px; }
.rule b { color: var(--orange); }

/* ===== 自由创作编辑器 ===== */
.create-header { justify-content: space-between; }
.btn-publish {
  padding: 6px 16px; font-size: 14px; font-weight: 700; color: #fff;
  background: var(--orange); border: none; border-radius: 20px; cursor: pointer;
}
.create-hint { text-align: center; font-size: 12.5px; color: var(--ink-dim); padding: 8px 16px 0; }
.create-stage { flex: 1; display: flex; align-items: center; justify-content: center; padding: 14px; min-height: 0; }
.create-canvas {
  container-type: size;                 /* 让里面用 cqw 单位，随画布缩放 */
  position: relative;
  width: 100%; max-width: 460px; aspect-ratio: 1240 / 1860;
  background: #fffdf7; border-radius: 8px; overflow: hidden;
  box-shadow: 0 10px 30px rgba(24, 30, 58, 0.2);
  touch-action: none;                   /* 拖动元素不触发页面滚动 */
}

/* 画布里的元素（文字 / 表情 / 图片） */
.elem {
  position: absolute; cursor: grab; user-select: none;
  transform: translate(-50%, -50%) rotate(var(--rot, 0deg)) scaleX(var(--flip, 1));
  transform-origin: center;
  line-height: 1.2; white-space: nowrap;
}
.elem.image { width: var(--w, 30cqw); }
.elem.image img { width: 100%; display: block; border-radius: 4px; }
.elem.text, .elem.emoji { font-size: var(--fs, 8cqw); }
.elem.selected { outline: 2px dashed var(--klein); outline-offset: 3px; }
.elem.text { white-space: normal; max-width: 84cqw; text-align: center; }
.elem.font-kai { font-family: "STKaiti", "KaiTi", "楷体", serif; }
.elem.font-hand { font-family: "Yuanti SC", "圆体", "YouYuan", sans-serif; }
.elem.font-song { font-family: "Songti SC", "宋体", "SimSun", serif; }
.elem.font-sys { font-family: -apple-system, "PingFang SC", sans-serif; }
.elem.font-hei { font-family: "PingFang SC", "Heiti SC", "黑体", "Microsoft YaHei", sans-serif; }
.elem.font-fang { font-family: "STFangsong", "FangSong", "仿宋", serif; }

/* 创作里直接打字的输入框 */
.ctrl-text-input { width: 100%; padding: 9px 12px; font-size: 16px; border: 1.5px solid var(--klein); border-radius: 10px; background: #fff; color: var(--ink); outline: none; }

/* 册子里展示已发布创作的“页” */
.post-canvas {
  container-type: size;
  position: relative;
  width: 100%; aspect-ratio: 1240 / 1860;
  background: #fffdf7;
}

/* @标签 + 署名（发布后显示在页面上） */
.post-at { position: absolute; top: 3cqw; left: 3cqw; font-size: 4cqw; color: var(--klein); background: rgba(27,52,214,0.1); padding: 1cqw 2.5cqw; border-radius: 4cqw; }
.post-sign { position: absolute; right: 3cqw; bottom: 3cqw; font-size: 3.6cqw; color: #9a8f7d; font-family: "STKaiti","KaiTi",serif; }

/* 选中元素的控制条 */
.elem-controls { padding: 10px 14px; border-top: 1px solid var(--border); background: var(--surface); }
.ctrl-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.ctrl-row:last-child { margin-bottom: 0; }
.ctrl-label { font-size: 13px; color: var(--ink-dim); flex: 0 0 auto; }
.ctrl-row input[type="range"] { flex: 1; }
.ctrl-select { padding: 6px 8px; border: 1.5px solid var(--border); border-radius: 8px; background: #fff; font-size: 13px; }
.ctrl-btn { padding: 7px 12px; font-size: 13px; border: 1.5px solid var(--border); background: #fff; border-radius: 8px; cursor: pointer; color: var(--ink); }
.ctrl-btn.danger { color: var(--danger); border-color: var(--danger); }
input[type="color"]#ctrl-color { width: 38px; height: 32px; border: 1.5px solid var(--border); border-radius: 8px; background: #fff; padding: 2px; }

/* 表情面板 */
.emoji-panel {
  display: grid; grid-template-columns: repeat(8, 1fr); gap: 4px;
  padding: 10px 14px; border-top: 1px solid var(--border); background: var(--surface);
  max-height: 160px; overflow-y: auto;
}
.emoji-panel button { font-size: 24px; background: none; border: none; cursor: pointer; padding: 4px; border-radius: 6px; }
.emoji-panel button:active { background: var(--surface-2); }

/* 底部工具栏 */
.create-toolbar { display: flex; gap: 8px; padding: 12px 14px calc(12px + env(safe-area-inset-bottom)); border-top: 1px solid var(--border); background: var(--surface); }
.tool-btn { flex: 1; padding: 12px 6px; font-size: 14px; font-weight: 600; color: var(--klein); background: rgba(27, 52, 214, 0.07); border: 1.5px solid rgba(27, 52, 214, 0.2); border-radius: 12px; cursor: pointer; }
.tool-btn:active { transform: scale(0.97); }
.tool-btn.at-set { background: var(--orange); color: #fff; border-color: var(--orange); }

/* @通知横幅（被 @ 的人进来看到） */
.at-banner {
  margin: 12px 16px 0; padding: 12px 14px; border-radius: 12px;
  background: rgba(255, 207, 51, 0.2); border: 1.5px solid rgba(255, 207, 51, 0.6);
  color: #8a6a00; font-size: 14px; display: flex; align-items: center; gap: 8px;
}

/* ===== 册子底部功能栏 ===== */
.visitor-nav {
  display: flex; gap: 8px;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom)) 68px;   /* 左边留位给音乐钮 */
  border-top: 1px solid var(--border); background: var(--surface);
}
.visitor-nav button {
  flex: 1; padding: 11px 6px; font-size: 14px; font-weight: 600;
  color: var(--klein); background: rgba(27, 52, 214, 0.07);
  border: 1.5px solid rgba(27, 52, 214, 0.2); border-radius: 12px; cursor: pointer;
}
.visitor-nav button:active { transform: scale(0.97); }

/* ===== 私聊 ===== */
.chat-messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.chat-empty { text-align: center; color: var(--ink-dim); margin-top: 40px; font-size: 14px; }
.chat-row { display: flex; }
.chat-row.mine { justify-content: flex-end; }
.chat-bubble { max-width: 76%; padding: 9px 13px; border-radius: 14px; font-size: 15px; line-height: 1.5; word-break: break-word; }
.bubble-who { font-size: 11px; color: var(--ink-dim); margin-bottom: 3px; }
.chat-bubble img { max-width: 220px; width: 100%; border-radius: 8px; display: block; }
.chat-row.mine .chat-bubble { background: var(--klein); color: #fff; border-bottom-right-radius: 4px; }
.chat-row.mine .bubble-who { color: rgba(255, 255, 255, 0.8); }
.chat-row.theirs .chat-bubble { background: var(--surface); border: 1px solid var(--border); color: var(--ink); border-bottom-left-radius: 4px; }
.chat-time { font-size: 10px; opacity: 0.7; margin-top: 3px; }
.msg-recall { font-size: 11px; text-decoration: underline; cursor: pointer; margin-left: 8px; }
.chat-row.mine .msg-recall { color: rgba(255, 255, 255, 0.85); }
.chat-row.theirs .msg-recall { color: var(--ink-dim); }
.msg-recalled { font-style: italic; opacity: 0.75; }
.msg-emoji { font-size: 34px; line-height: 1; }
.idpw-sub { margin-top: 10px; font-size: 14px; color: var(--ink-dim); line-height: 1.6; }

.chat-input-row {
  display: flex; gap: 8px; align-items: center;
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border); background: var(--surface);
}
.chat-img-btn { flex: 0 0 auto; width: 42px; height: 42px; font-size: 20px; background: var(--surface-2); border: 1.5px solid var(--border); border-radius: 10px; cursor: pointer; }
.chat-input-row input { flex: 1; padding: 11px 14px; font-size: 16px; border: 1.5px solid var(--border); border-radius: 12px; background: #fff; color: var(--ink); outline: none; }
.chat-input-row input:focus { border-color: var(--klein); }
.chat-send { flex: 0 0 auto; padding: 11px 16px; font-size: 15px; font-weight: 700; color: #fff; background: var(--orange); border: none; border-radius: 12px; cursor: pointer; }

/* ===== 通知 ===== */
.notice-card { border-top: 5px solid var(--orange); }
.notice-text { margin: 14px 0 18px; font-size: 16px; line-height: 1.7; color: var(--ink); white-space: pre-wrap; text-align: left; }
#notice-current { margin-top: 16px; }

/* 私聊监管里可点的房间 */
.room-card { cursor: pointer; }
.room-card:active { background: var(--surface-2); }

/* ===== 目录 ===== */
.header-btns { display: flex; gap: 8px; }
.toc-card { max-width: 380px; text-align: left; }
.toc-list { margin: 8px 0 12px; max-height: 62vh; overflow-y: auto; }
.toc-item {
  padding: 12px 10px; font-size: 16px; font-weight: 700; color: var(--ink);
  border-bottom: 1px solid var(--border); cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
}
.toc-item:active { background: var(--surface-2); }
.toc-item span { color: var(--klein); }
.toc-sub { padding-left: 12px; }
.toc-sub .toc-item { font-size: 14.5px; font-weight: 600; color: var(--ink-dim); }
.toc-pages { padding: 6px 0 10px; }
.toc-page {
  display: inline-block; padding: 8px 11px; margin: 4px 4px 0 0; font-size: 13px;
  background: rgba(27, 52, 214, 0.07); border: 1px solid rgba(27, 52, 214, 0.18);
  border-radius: 8px; color: var(--klein); cursor: pointer;
}
.toc-page:active { background: rgba(27, 52, 214, 0.16); }

/* 轻提示 toast */
.toast {
  position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%) translateY(10px);
  background: rgba(29, 38, 71, 0.94); color: #fff; padding: 10px 18px; border-radius: 22px;
  font-size: 14px; z-index: 60; opacity: 0; pointer-events: none; transition: opacity .2s, transform .2s;
  max-width: 80%; text-align: center; box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== 大屏幕适配 ===== */
@media (min-width: 700px) {
  .greeting { font-size: 40px; }
  .gallery { grid-template-columns: repeat(3, 1fr); }
  .mode-main { max-width: 900px; margin: 0 auto; }
}