/* 错题本 WebApp - Ant Design 风格 · 橙色主题
   设计令牌来自 design-style/experience/ 下的设计规范
   主题色参考 build_book/charts.py 的橙色配色 (#FF6B35) */

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

/* 全局屏蔽长按选择/复制（仅放行输入类元素与图片），并禁止 iOS 长按呼出菜单 */
*:not(input):not(textarea):not(select):not([contenteditable="true"]):not(img) {
  -webkit-user-select: none !important;
  user-select: none !important;
  -webkit-touch-callout: none !important;
}
img {
  /* 题目 render_pic 等图片允许长按保存/复制（keyword: 长按 保存图片） */
  -webkit-user-select: auto;
  user-select: auto;
  -webkit-touch-callout: default;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  user-select: text;
  -webkit-touch-callout: default;
}

:root {
  /* ===== 核心功能色 (Seed Token) ===== */
  --color-primary: #FF6B35;
  --color-primary-hover: #FF8A5C;
  --color-primary-active: #E55A2B;
  --color-primary-bg: #FFF3ED;
  --color-primary-bg-hover: #FFE0CC;
  --color-primary-border: #FFC4A0;
  --color-primary-border-hover: #FFA878;
  --color-primary-text: #FF6B35;

  --color-success: #52C41A;
  --color-success-bg: #F6FFED;
  --color-warning: #FAAD14;
  --color-warning-bg: #FFFBE6;
  --color-error: #FF4D4F;
  --color-error-bg: #FFF2F0;
  --color-info: #FF6B35;
  --color-info-bg: #FFF3ED;

  /* ===== 中性色 (文本与背景) ===== */
  --color-text: rgba(0, 0, 0, 0.88);
  --color-text-secondary: rgba(0, 0, 0, 0.65);
  --color-text-tertiary: rgba(0, 0, 0, 0.45);
  --color-text-quaternary: rgba(0, 0, 0, 0.25);

  --color-border: #D9D9D9;
  --color-border-secondary: #F0F0F0;
  --color-split: rgba(0, 0, 0, 0.06);

  /* 三层表面模型 */
  --color-bg-layout: #F6F7F9;
  --color-bg-container: #FFFFFF;
  --color-bg-elevated: #FFFFFF;
  --color-bg-container-fa: #FAFAFB;

  /* ===== 字体系统 ===== */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif,
    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol",
    "Noto Color Emoji";
  --font-family-code: "SFMono-Regular", Consolas, "Liberation Mono", Menlo,
    Courier, monospace;

  --font-size-display-lg: 38px;
  --font-size-headline-lg: 30px;
  --font-size-headline-md: 24px;
  --font-size-headline-sm: 20px;
  --font-size-title-lg: 16px;
  --font-size-title-md: 14px;
  --font-size-body-lg: 16px;
  --font-size-body-md: 14px;
  --font-size-body-sm: 12px;
  --font-size-code: 13px;

  --line-height-display-lg: 46px;
  --line-height-headline-lg: 38px;
  --line-height-headline-md: 32px;
  --line-height-headline-sm: 28px;
  --line-height-title-lg: 24px;
  --line-height-title-md: 22px;
  --line-height-body-lg: 24px;
  --line-height-body-md: 22px;
  --line-height-body-sm: 20px;
  --line-height-code: 20px;

  --font-weight-regular: 400;
  --font-weight-strong: 600;

  /* ===== 间距系统 (4px 网格) ===== */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  --control-height-xs: 16px;
  --control-height-sm: 24px;
  --control-height: 32px;
  --control-height-lg: 40px;

  /* ===== 圆角系统 ===== */
  --border-radius-sm: 2px;
  --border-radius-md: 4px;
  --border-radius-default: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-full: 9999px;

  /* ===== 阴影系统 (三层叠加) ===== */
  --box-shadow-tertiary: 0 1px 2px 0 rgba(0,0,0,0.05),
    0 1px 6px -1px rgba(0,0,0,0.03),
    0 2px 4px 0 rgba(0,0,0,0.03);
  --box-shadow: 0 6px 16px 0 rgba(0,0,0,0.08),
    0 3px 6px -4px rgba(0,0,0,0.12),
    0 9px 28px 8px rgba(0,0,0,0.05);
  --box-shadow-card: 0 1px 2px 0 rgba(0,0,0,0.03),
    0 1px 6px -1px rgba(0,0,0,0.02),
    0 2px 4px 0 rgba(0,0,0,0.02);

  /* ===== Z-Index 层级 ===== */
  --z-index-popup-base: 1000;
  --z-index-modal-mask: 1000;
  --z-index-notification: 1010;
  --z-index-message: 1020;

  /* ===== 动效系统 ===== */
  --motion-duration-fast: 0.1s;
  --motion-duration-mid: 0.2s;
  --motion-duration-slow: 0.3s;

  --motion-ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);
  --motion-ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
  --motion-ease-in-out-circ: cubic-bezier(0.78, 0.14, 0.15, 0.86);
  --motion-ease-out-circ: cubic-bezier(0.08, 0.82, 0.17, 1);
  --motion-ease-out-back: cubic-bezier(0.12, 0.4, 0.29, 1.46);
  --motion-ease-in-back: cubic-bezier(0.71, -0.46, 0.88, 0.6);
  --motion-ease-in-quint: cubic-bezier(0.755, 0.05, 0.855, 0.06);
  --motion-ease-out-quint: cubic-bezier(0.23, 1, 0.32, 1);

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* 兼容旧变量名 */
  --primary: var(--color-primary);
  --primary-dark: var(--color-primary-active);
  --wrong: var(--color-error);
  --correct: var(--color-success);
  --warn: var(--color-warning);
  --bg: var(--color-bg-layout);
  --card: var(--color-bg-container);
  --text: var(--color-text);
  --muted: var(--color-text-secondary);
  --border: var(--color-border);
  --shadow: var(--box-shadow-card);
}

body {
  font-family: var(--font-family);
  background: var(--color-bg-layout);
  color: var(--color-text);
  font-size: var(--font-size-body-md);
  line-height: var(--line-height-body-md);
  font-weight: var(--font-weight-regular);
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* 全局输入控件基础样式（keyword: 输入框 padding 光标 caret）：
   统一内边距/圆角/边框，caret 用主题色提升辨识度 */
input, select, textarea {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-bg-container);
  outline: none;
  caret-color: var(--color-primary);
  transition: border-color var(--motion-duration-fast) var(--motion-ease-in-out),
    box-shadow var(--motion-duration-fast) var(--motion-ease-in-out);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
}
input::placeholder, textarea::placeholder { color: var(--color-text-quaternary); }
.hidden { display: none !important; }

/* ---------- App shell ---------- */
#app { min-height: 100vh; }
.app-header {
  position: sticky; top: 0; z-index: 20;
  background: var(--color-primary); color: #fff;
  padding: calc(12px + var(--safe-top)) var(--spacing-md) 12px;
  display: flex; align-items: center; gap: var(--spacing-sm);
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.15);
  transition: background var(--motion-duration-fast) var(--motion-ease-in-out);
}
.app-header .back {
  font-size: 22px; line-height: 1; cursor: pointer; padding: var(--spacing-xs);
  transition: opacity var(--motion-duration-fast) var(--motion-ease-in-out);
}
.app-header .back:active { opacity: 0.7; }
.app-header h1 { font-size: 17px; font-weight: var(--font-weight-strong); flex: 1; }
.app-header .action {
  font-size: var(--font-size-body-md); opacity: 0.9; cursor: pointer;
  transition: opacity var(--motion-duration-fast) var(--motion-ease-in-out);
}
.app-header .action:active { opacity: 0.7; }

.app-main {
  max-width: 680px; margin: 0 auto;
  padding: 12px 16px calc(88px + var(--safe-bottom));
  display: flex; flex-direction: column; gap: 12px;
}
/* 亲密性原则（keyword: 间距 分组 接近原则）：工作台模块多，模块间收紧
   以便一屏展示更多内容；详情类页面保持 12px 组间距 */
.app-main[data-page="dashboard"] { gap: 10px; padding-top: 10px; }

/* ---------- Bottom nav ---------- */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 30;
  max-width: 680px; margin: 0 auto;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border-secondary);
  padding-bottom: var(--safe-bottom);
  display: flex;
  box-shadow: 0 -1px 6px 0 rgba(0, 0, 0, 0.03), 0 -1px 4px 0 rgba(0, 0, 0, 0.02);
}
.tab {
  flex: 1; text-align: center; padding: 8px 0 6px;
  color: var(--color-text-secondary); cursor: pointer; border: 0; background: none;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  transition: color var(--motion-duration-fast) var(--motion-ease-in-out);
}
.tab .ico { font-size: 20px; line-height: 1; }
.tab .lbl { font-size: 11px; }
.tab.active { color: var(--color-primary); }
.tab.center .ico {
  background: var(--color-primary); color: #fff; width: 46px; height: 46px;
  border-radius: var(--border-radius-full);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-top: -18px;
  box-shadow: 0 3px 8px rgba(255, 107, 53, 0.4), 0 1px 4px rgba(255, 107, 53, 0.2);
  transition: transform var(--motion-duration-mid) var(--motion-ease-out-back),
    box-shadow var(--motion-duration-fast) var(--motion-ease-in-out);
}
.tab.center:active .ico {
  transform: scale(0.92);
  box-shadow: 0 2px 6px rgba(255, 107, 53, 0.3);
}
.tab.center .lbl { margin-top: 2px; }

/* ---------- Login ---------- */
.login-wrap {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; padding: var(--spacing-lg);
  background: linear-gradient(160deg, var(--color-primary), var(--color-primary-active));
  animation: fadeIn var(--motion-duration-slow) var(--motion-ease-in-out);
}
.login-card {
  width: 100%; max-width: 360px;
  background: var(--color-bg-elevated);
  border-radius: var(--border-radius-xl);
  padding: 28px 20px;
  box-shadow: var(--box-shadow);
  animation: scaleInElastic var(--motion-duration-slow) var(--motion-ease-out-back);
}
.login-card h2 {
  text-align: center; font-size: var(--font-size-headline-sm);
  font-weight: var(--font-weight-strong); margin-bottom: 6px;
}
.login-card .sub {
  text-align: center; color: var(--color-text-secondary);
  font-size: 13px; margin-bottom: 20px;
}
.login-card .err {
  color: var(--color-error); font-size: 13px; margin-bottom: 10px;
  animation: fadeIn var(--motion-duration-fast) var(--motion-ease-out);
}

/* ---------- Card ---------- */
.card {
  background: var(--color-bg-container);
  border-radius: 14px;
  padding: 18px 16px;
  border: 1px solid var(--color-border-secondary);
  box-shadow: var(--box-shadow-card);
  transition: all var(--motion-duration-mid) var(--motion-ease-out);
}
.card .card-title {
  font-size: 15px; font-weight: var(--font-weight-strong);
  margin-bottom: 12px; display: flex; align-items: center; justify-content: space-between;
}
.section-title {
  font-size: 13px; color: var(--color-text-secondary);
  margin: var(--spacing-sm) 4px;
}

/* ---------- Forms ---------- */
.field { margin-bottom: 12px; }
.field label {
  display: block; font-size: 13px; color: var(--color-text-secondary);
  margin-bottom: 6px;
}
.field input, .field select, .field textarea {
  width: 100%;
  transition: all var(--motion-duration-fast) var(--motion-ease-in-out);
}
.field input:hover, .field select:hover, .field textarea:hover {
  border-color: var(--color-primary-hover);
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.12);
}
.field textarea { resize: vertical; min-height: 72px; }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ---------- Buttons ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-block; width: 100%;
  padding: 13px 18px; border: none;
  border-radius: 12px;
  font-size: 15px; font-weight: var(--font-weight-strong);
  cursor: pointer; user-select: none;
  -webkit-appearance: none;
  transition: all var(--motion-duration-fast) var(--motion-ease-in-out);
}
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn.primary {
  background: var(--color-primary); color: #fff;
  border: 1px solid var(--color-primary);
  box-shadow: 0 2px 4px rgba(255, 107, 53, 0.2);
}
.btn.primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn.primary:active { background: var(--color-primary-active); border-color: var(--color-primary-active); }
.btn.ghost {
  background: transparent; color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}
.btn.ghost:hover { color: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn.ghost:active { color: var(--color-primary-active); border-color: var(--color-primary-active); }
.btn.danger {
  background: var(--color-error); color: #fff;
  border: 1px solid var(--color-error);
  box-shadow: 0 2px 4px rgba(255, 77, 79, 0.2);
}
.btn.danger:hover { background: #ff7875; border-color: #ff7875; }
.btn.danger:active { background: #d9363e; border-color: #d9363e; }
.btn.small { width: auto; padding: 8px 14px; font-size: 13px; border-radius: 9px; }
.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

/* 涟漪效果 */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  pointer-events: none;
  animation: ripple var(--motion-duration-mid) var(--motion-ease-out);
}
.btn.ghost .ripple, .btn-text .ripple { background: rgba(0, 0, 0, 0.08); }

/* ---------- Lists ---------- */
.list {
  background: var(--color-bg-container);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--box-shadow-card);
}
.list-item {
  padding: 14px 16px; border-bottom: 1px solid var(--color-border-secondary);
  display: flex; align-items: center; gap: 12px; cursor: pointer;
  transition: background var(--motion-duration-fast) var(--motion-ease-in-out);
}
.list-item:last-child { border-bottom: none; }
.list-item:active { background: var(--color-bg-container-fa); }
.list-item .avatar {
  width: 40px; height: 40px;
  border-radius: var(--border-radius-full);
  background: var(--color-primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 16px; flex-shrink: 0;
  transition: background var(--motion-duration-fast) var(--motion-ease-in-out);
}
.list-item .main { flex: 1; min-width: 0; }
.list-item .name { font-size: 15px; font-weight: 500; }
.list-item .meta { font-size: 12px; color: var(--color-text-tertiary); margin-top: 2px; }
.list-item .arrow { color: var(--color-border); font-size: 18px; }

/* ---------- Badges / pills ---------- */
.badge {
  display: inline-block; padding: 2px 8px;
  border-radius: var(--border-radius-full);
  font-size: 11px; font-weight: var(--font-weight-strong);
  animation: scaleInElastic var(--motion-duration-mid) var(--motion-ease-out-back);
}
/* 错题卡片右上角删除按钮 */
.del-q {
  position: absolute; top: 8px; right: 8px;
  width: 26px; height: 26px; padding: 0;
  border: none; border-radius: var(--border-radius-full);
  background: var(--color-error); color: #fff;
  font-size: 14px; line-height: 26px; cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,.25);
  opacity: .55; transition: opacity .15s;
}
.del-q:hover { opacity: 1; }
.del-q:disabled { opacity: .3; cursor: wait; }
.badge.wrong { background: var(--color-error-bg); color: var(--color-error); }
.badge.correct { background: var(--color-success-bg); color: var(--color-success); }
.badge.muted { background: var(--color-bg-container-fa); color: var(--color-text-secondary); }
.badge.primary { background: var(--color-primary-bg); color: var(--color-primary); }
.role-tag {
  display: inline-block; padding: 1px 7px;
  border-radius: var(--border-radius-md);
  font-size: 11px; margin-left: 6px;
}
.role-tag.学生 { background: var(--color-primary-bg); color: var(--color-primary); }
.role-tag.家长 { background: var(--color-warning-bg); color: #D48806; }
.role-tag.老师 { background: var(--color-success-bg); color: #389E0D; }
.role-tag.校长 { background: var(--color-error-bg); color: var(--color-error); }

/* ---------- Empty state ---------- */
.empty {
  text-align: center; color: var(--color-text-tertiary);
  padding: 40px 16px; font-size: 14px;
  animation: fadeIn var(--motion-duration-mid) var(--motion-ease-out);
}
.empty .ico { font-size: 40px; margin-bottom: 8px; }

/* ---------- Stats grid ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat-box {
  background: var(--color-bg-container);
  border-radius: 14px;
  padding: 16px 10px; text-align: center;
  border: 1px solid var(--color-border-secondary);
  box-shadow: var(--box-shadow-card);
  cursor: pointer;
  transition: all var(--motion-duration-mid) var(--motion-ease-out);
}
.stat-box:active { transform: scale(0.96); }
.stat-box .num { font-size: 23px; font-weight: 700; }
.stat-box .lbl { font-size: 12px; color: var(--color-text-secondary); margin-top: 4px; }
.stat-box.wrong .num { color: var(--color-error); }
.stat-box.correct .num { color: var(--color-success); }

/* ---------- Sheet (bottom modal) ---------- */
.sheet-mask {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: var(--z-index-modal-mask);
  display: flex; align-items: flex-end; justify-content: center;
  animation: fadeIn var(--motion-duration-slow) var(--motion-ease-in-out);
}
.sheet {
  width: 100%; max-width: 680px;
  background: var(--color-bg-elevated);
  border-radius: 20px 20px 0 0;
  padding: 20px 20px calc(24px + var(--safe-bottom));
  max-height: 88vh; overflow-y: auto;
  box-shadow: var(--box-shadow);
  animation: sheetSlideIn var(--motion-duration-slow) var(--motion-ease-out-circ);
}
.sheet .sheet-title {
  font-size: 17px; font-weight: var(--font-weight-strong);
  margin-bottom: 16px; display: flex; justify-content: space-between;
}
.sheet .close {
  color: var(--color-text-secondary); font-size: 20px; cursor: pointer;
  transition: color var(--motion-duration-fast) var(--motion-ease-in-out);
}
.sheet .close:hover { color: var(--color-text); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.8); color: #fff;
  padding: 10px 16px; border-radius: var(--border-radius-default);
  font-size: 14px; z-index: var(--z-index-message);
  max-width: 80%; text-align: center;
  animation: toastIn var(--motion-duration-mid) var(--motion-ease-out);
}

/* ---------- Entry: upload ---------- */
.upload-label {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 6px;
  border: 2px dashed var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 28px 12px; cursor: pointer;
  transition: all var(--motion-duration-fast) var(--motion-ease-in-out);
}
.upload-label:active { border-color: var(--color-primary); background: var(--color-primary-bg); }
.upload-text { font-size: 16px; font-weight: var(--font-weight-strong); }
.upload-hint { font-size: 12px; color: var(--color-text-tertiary); }
.drag-over .upload-label {
  border-color: var(--color-primary); background: var(--color-primary-bg);
}
.preview { display: flex; flex-wrap: wrap; gap: var(--spacing-sm); margin-top: 12px; }
.preview-thumb {
  width: 64px; height: 64px; object-fit: cover;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--color-border);
}

.progress-text { font-size: 14px; margin-bottom: 8px; }
.progress-bar {
  width: 100%; height: 8px;
  background: var(--color-border-secondary);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0;
  background: var(--color-primary);
  border-radius: var(--border-radius-full);
  transition: width var(--motion-duration-slow) var(--motion-ease-out);
}

/* ---------- Entry: carousel ---------- */
.carousel {
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  background: #000; touch-action: pan-y;
}
.carousel-track { display: flex; will-change: transform; }
.slide { flex: 0 0 100%; min-width: 0; display: flex; flex-direction: column; }
.slide-image-area { position: relative; background: #000; line-height: 0; }
.result-image {
  display: block; width: 100%; height: auto;
  max-height: 66vh; object-fit: contain;
}
.slide-status {
  position: absolute; top: 10px; left: 10px;
  background: rgba(0, 0, 0, 0.6); color: #fff;
  font-size: 12px; padding: 4px 10px;
  border-radius: var(--border-radius-default); line-height: 1.4;
}
.slide-status.error { background: rgba(255, 77, 79, 0.85); }
.slide-footer {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px; background: #fff; gap: 8px;
}
.slide-footer .counts { font-size: 13px; font-weight: var(--font-weight-strong); }
.slide-footer .hint { font-size: 11px; color: var(--color-text-tertiary); }
/* touch-action: pan-y —— 垂直滑动交给浏览器滚动页面，水平滑动仍由 JS 轮播翻页处理 */
.overlay-svg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; touch-action: pan-y; }
.q-rect {
  fill: transparent; stroke-width: 3;
  pointer-events: auto; cursor: pointer; touch-action: pan-y;
  transition: fill var(--motion-duration-fast) var(--motion-ease-in-out),
    fill-opacity var(--motion-duration-fast) var(--motion-ease-in-out);
}
.q-rect.wrong { stroke: var(--color-error); fill: rgba(255, 77, 79, 0.18); }
.q-rect.correct { stroke: var(--color-success); fill: rgba(82, 196, 26, 0.12); }
.q-rect:active { fill-opacity: 0.5; }
.q-rect.selected {
  stroke-width: 5;
  filter: drop-shadow(0 0 6px rgba(255, 107, 53, 0.7));
}
.q-rect.drawing-temp { stroke-dasharray: 8 4; animation: dashAnim 0.6s linear infinite; }
@keyframes dashAnim { to { stroke-dashoffset: -12; } }
.q-label {
  fill: #fff; font-weight: 700;
  paint-order: stroke; stroke: rgba(0, 0, 0, 0.5); stroke-width: 3px;
  pointer-events: none;
}
.q-handle {
  fill: #fff; stroke: var(--color-primary); stroke-width: 2.5;
  pointer-events: auto; touch-action: none;
  -webkit-touch-callout: none; -webkit-user-select: none; user-select: none;
  transition: fill var(--motion-duration-fast) var(--motion-ease-in-out);
}
.q-handle:hover { fill: var(--color-primary); stroke: #fff; r: 16; }
.drawing-bg { pointer-events: auto; touch-action: none; }
.carousel-nav {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; margin-top: 10px;
}
.nav-btn {
  width: 40px; height: 40px;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--color-border);
  background: #fff; font-size: 22px; line-height: 1;
  color: var(--color-primary); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--motion-duration-fast) var(--motion-ease-in-out);
}
.nav-btn:hover { color: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.nav-btn:active { transform: scale(0.92); }
.nav-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.slide-indicator { font-size: 14px; color: var(--color-text-secondary); min-width: 48px; text-align: center; }
.actions-bar { display: flex; gap: 10px; margin-top: 10px; }
.actions-bar .btn { flex: 1; }

/* ---------- Entry: meta selector ---------- */
.meta-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.meta-bar select { flex: 1; min-width: 90px; }
.meta-bar input { flex: 1; min-width: 90px; }

/* ---------- 作业详情：题目错因/难度手动标注 ---------- */
.q-attr-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.q-attr-row label { font-size: 13px; color: var(--color-text-secondary); white-space: nowrap; }
.q-attr-row select { flex: 1; min-width: 90px; }
.q-attr-row input { flex: 1; min-width: 120px; }

/* ---------- 录入页：待处理作业批次列表 ---------- */
.batch-item { display: flex; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px dashed var(--color-border-secondary); }
.batch-item:last-child { border-bottom: none; }
.batch-item.active { background: rgba(255, 107, 53, .06); border-radius: 8px; padding-left: 8px; padding-right: 8px; }
.batch-item .bi-main { flex: 1; min-width: 0; }
.batch-item .bi-name { font-size: 14px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.batch-item .bi-meta { font-size: 12px; color: var(--color-text-secondary); margin-top: 2px; }

/* ---------- Autocomplete dropdown ---------- */
.autocomplete { position: relative; flex: 1; min-width: 120px; }
.autocomplete input { width: 100%; }
.autocomplete-dropdown {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  max-height: 280px; overflow-y: auto;
  background: #fff;
  border: 1px solid var(--color-border-secondary);
  border-radius: 14px; z-index: 100;
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
  padding: 6px;
  display: none;
}
.autocomplete-dropdown.show { display: block; animation: fadeIn var(--motion-duration-fast) var(--motion-ease-out); }
.autocomplete-item {
  padding: 12px 12px; cursor: pointer; font-size: 14px;
  border-radius: 9px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  transition: background var(--motion-duration-fast) var(--motion-ease-in-out);
}
.autocomplete-item:hover, .autocomplete-item.active {
  background: var(--color-primary-bg, #fff5f0);
  color: var(--color-primary, #FF6B35);
}
.autocomplete-empty { padding: 12px; font-size: 13px; color: var(--color-text-tertiary, #999); text-align: center; }

/* ---------- Misc ---------- */
.muted { color: var(--color-text-secondary); }
.center { text-align: center; }
.mt8 { margin-top: 8px; }
.mt12 { margin-top: 12px; }
.mt4 { margin-top: 4px; }
.mt6 { margin-top: 6px; }
.flex { display: flex; }
.gap8 { gap: 8px; }
.between { justify-content: space-between; }
.spin {
  display: inline-block;
  animation: spin var(--motion-duration-slow) linear infinite;
}

/* ---------- 关键帧动画 ---------- */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes ripple {
  0% { transform: scale(0); opacity: 0.6; }
  100% { transform: scale(2.5); opacity: 0; }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes fadeOut {
  0% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes scaleInElastic {
  0% { transform: scale(0.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes toastIn {
  0% { opacity: 0; transform: translate(-50%, -40%); }
  100% { opacity: 1; transform: translate(-50%, -50%); }
}

@keyframes sheetSlideIn {
  0% { transform: translateY(100%); }
  100% { transform: translateY(0); }
}

@keyframes pageEnter {
  0% { opacity: 0; transform: translateY(8px); }
  100% { opacity: 1; transform: translateY(0); }
}

/* 页面切换进场动画 */
.app-main { animation: pageEnter var(--motion-duration-mid) var(--motion-ease-out); }

/* ---------- Entry: 轮播图片右上角删除按钮（红色圆形叉号） ---------- */
.slide-del-btn {
  position: absolute; top: 10px; right: 10px;
  width: 30px; height: 30px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  border: none; border-radius: var(--border-radius-full);
  background: var(--color-error); color: #fff;
  cursor: pointer; line-height: 1;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  opacity: .85; transition: transform var(--motion-duration-fast) var(--motion-ease-out), opacity var(--motion-duration-fast);
  z-index: 5;
}
.slide-del-btn:hover { opacity: 1; transform: scale(1.08); }
.slide-del-btn:active { transform: scale(0.92); }

/* 处理失败的图片：置灰 */
.result-image.failed { filter: grayscale(1); opacity: 0.55; }

/* 处理失败遮罩：中央重试按钮 + 失败原因 */
.slide-fail-overlay {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
  background: rgba(0, 0, 0, 0.35);
  z-index: 4;
}
.slide-retry-btn {
  width: 56px; height: 56px; padding: 0;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid #fff; border-radius: var(--border-radius-full);
  background: rgba(255, 77, 79, 0.9); color: #fff;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: transform var(--motion-duration-fast) var(--motion-ease-out);
}
.slide-retry-btn:hover { transform: scale(1.08); }
.slide-retry-btn:active { transform: scale(0.92); }
.slide-fail-reason {
  color: #ff7875; font-size: 13px; font-weight: var(--font-weight-strong);
  background: rgba(0, 0, 0, 0.55);
  padding: 4px 12px; border-radius: var(--border-radius-default);
  max-width: 86%; text-align: center;
}

/* ---------- Entry: 追加图片（胶囊按钮） ---------- */
.add-img-pill {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: var(--control-height);
  padding: 0 16px;
  border: 1px dashed var(--color-primary-border);
  border-radius: var(--border-radius-full);
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: 13px; font-weight: var(--font-weight-strong);
  cursor: pointer; flex: 1; min-width: 0;
  transition: all var(--motion-duration-fast) var(--motion-ease-in-out);
}
.add-img-pill:hover { background: var(--color-primary-bg-hover); border-color: var(--color-primary-border-hover); }
.add-img-pill:active { transform: scale(0.97); }

/* ---------- Entry: 删除本次作业（红描边按钮） ---------- */
.btn.danger-outline {
  background: #fff; color: var(--color-error);
  border: 1px solid var(--color-error);
}
.btn.danger-outline:hover { background: var(--color-error-bg); border-color: #ff7875; color: #ff7875; }
.btn.danger-outline:active { background: #fff1f0; border-color: #d9363e; color: #d9363e; }

/* ---------- Guide 系统介绍页 ---------- */
.guide-hero {
  text-align: center; padding: 28px 16px 24px;
  background: linear-gradient(180deg, var(--color-primary-bg) 0%, #fff 100%);
}
.guide-hero-ico { font-size: 44px; line-height: 1; }
.guide-hero-title {
  font-size: var(--font-size-headline-md); font-weight: 700;
  margin-top: 10px; color: var(--color-primary);
}
.guide-hero-sub { font-size: 13px; color: var(--color-text-secondary); margin-top: 4px; }
.guide-hero-desc {
  font-size: 13px; color: var(--color-text-tertiary);
  margin-top: 10px; line-height: 1.7; padding: 0 6px;
}
.guide-feature {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px;
}
.guide-feature-ico {
  flex: 0 0 42px; width: 42px; height: 42px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; border-radius: var(--border-radius-lg);
  background: var(--color-primary-bg);
}
.guide-feature-main { flex: 1; min-width: 0; }
.guide-feature-title { font-size: 15px; font-weight: var(--font-weight-strong); }
.guide-feature-desc {
  font-size: 13px; color: var(--color-text-secondary);
  margin-top: 4px; line-height: 1.7;
}
.guide-role {
  display: flex; gap: 8px; align-items: flex-start;
  padding: 7px 0; font-size: 13px; line-height: 1.7;
}
.guide-role .role-tag { flex: 0 0 auto; margin-left: 0; margin-top: 3px; }
.guide-role-desc { color: var(--color-text-secondary); flex: 1; min-width: 0; }
.guide-steps { display: flex; flex-direction: column; gap: 12px; }
.guide-step {
  display: flex; gap: 10px; align-items: center;
  font-size: 13px; color: var(--color-text);
}
.guide-step-no {
  flex: 0 0 24px; width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--border-radius-full);
  background: var(--color-primary); color: #fff;
  font-size: 12px; font-weight: 700;
}
.guide-faq { border-bottom: 1px solid var(--color-border-secondary); }
.guide-faq:last-child { border-bottom: none; }
.guide-faq summary {
  padding: 12px 2px; font-size: 14px; font-weight: 500;
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center;
}
.guide-faq summary::-webkit-details-marker { display: none; }
.guide-faq summary::after { content: '＋'; color: var(--color-primary); font-size: 16px; }
.guide-faq[open] summary::after { content: '－'; }
.guide-faq div {
  padding: 0 2px 12px; font-size: 13px;
  color: var(--color-text-secondary); line-height: 1.7;
}