/* ==========================================================================
   CET-4 学习站 · 样式表
   浅色主题 · 设计令牌 · 组件库
   ========================================================================== */

:root {
  /* 背景与表面 */
  --bg: #f5f6fb;
  --bg-deco: radial-gradient(1200px 500px at 12% -8%, #e8ebff 0%, rgba(232, 235, 255, 0) 60%),
             radial-gradient(900px 420px at 92% 4%, #e3f7f5 0%, rgba(227, 247, 245, 0) 62%);
  --surface: #ffffff;
  --surface-2: #f3f5fa;
  --surface-3: #eceff7;

  /* 文字 */
  --text: #171a26;
  --text-2: #565d70;
  --text-3: #8b92a5;

  /* 主色 */
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --primary-soft: #eceafe;
  --primary-ring: rgba(79, 70, 229, 0.18);

  --accent: #0d9488;
  --accent-soft: #e0f5f2;

  --success: #15a34a;
  --success-soft: #e4f7ea;
  --warn: #d97706;
  --warn-soft: #fdf1de;
  --danger: #dc3545;
  --danger-soft: #fdeaec;
  --info: #2563eb;
  --info-soft: #e8f0fe;

  /* 描边与阴影 */
  --border: #e4e7f0;
  --border-strong: #d3d8e6;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 8px 22px rgba(16, 24, 40, 0.06);
  --shadow-lg: 0 2px 4px rgba(16, 24, 40, 0.04), 0 18px 40px rgba(16, 24, 40, 0.10);

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", monospace;

  /* 顶栏高度 —— 移动端会调矮，sticky 元素（如听力播放器）统一引用它 */
  --topbar-h: 62px;

  /* ---- 以下令牌专供主题切换 ----
     凡是「浅色下必须是白/浅底、深色下必须换掉」的地方，都走变量，
     这样 [data-theme="dark"] 一个块就能覆盖全站，不用改选择器。 */

  --glass: rgba(255, 255, 255, 0.86);          /* 顶栏毛玻璃 */
  --glass-strong: rgba(255, 255, 255, 0.92);   /* 底部操作条 */
  --scrim: rgba(23, 26, 38, 0.36);             /* 抽屉遮罩 */
  --plain: #ffffff;                            /* 需要纯实底的小控件 */

  --hero-bg: linear-gradient(135deg, #ffffff 0%, #f7f8ff 52%, #eefaf8 100%);
  --card-bg: linear-gradient(160deg, #ffffff 0%, #f8f9ff 100%);
  --score-bg: linear-gradient(135deg, #ffffff, #f4f6ff 60%, #eafaf7);
  --hero-panel-bg: rgba(255, 255, 255, 0.78);
  --feature-hover-border: #d8dcec;

  --passage-text: #2c3140;

  --explain-bg: #e8f0fe;
  --explain-border: #d5e2fb;
  --explain-text: #1e3a8a;
  --explain-strong: #1e40af;

  --note-bg: #fdf1de;
  --note-border: #f5e0bd;
  --note-text: #7c4a03;

  --hl-bg: #fff3c4;

  --heat-1: #cfd4ff;
  --heat-2: #a5a9f7;
  --heat-3: #7c74ee;
  --heat-4: var(--primary);

  --on-success: #0f7a37;
  --on-warn: #92400e;
  --on-danger: #a51f2c;
  --on-info: #1d4ed8;
  --on-accent: #0f766e;
}

/* ==========================================================================
   深色主题
   由 <head> 里的内联脚本在首屏绘制前写入 html[data-theme]，
   避免样式生效晚一帧导致的白色闪屏。
   ========================================================================== */

[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0f1117;
  --bg-deco: radial-gradient(1200px 500px at 12% -8%, #1b1f3a 0%, rgba(27, 31, 58, 0) 60%),
             radial-gradient(900px 420px at 92% 4%, #10302e 0%, rgba(16, 48, 46, 0) 62%);
  --surface: #171a24;
  --surface-2: #1e222e;
  --surface-3: #262b3a;

  --text: #e8eaf2;
  --text-2: #a8b0c4;
  --text-3: #737d94;

  /* 主色在深底上要提亮，否则对比度不够 */
  --primary: #7c78f0;
  --primary-600: #a5a2f7;
  --primary-soft: #262450;
  --primary-ring: rgba(124, 120, 240, 0.30);

  --accent: #2dd4bf;
  --accent-soft: #10302e;

  --success: #34d399;
  --success-soft: #10291f;
  --warn: #fbbf24;
  --warn-soft: #33260c;
  --danger: #f87171;
  --danger-soft: #3a1a1e;
  --info: #60a5fa;
  --info-soft: #14233f;

  --border: #2a2f3d;
  --border-strong: #3a4152;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.30);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.30), 0 8px 22px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.30), 0 18px 40px rgba(0, 0, 0, 0.45);

  --glass: rgba(23, 26, 36, 0.86);
  --glass-strong: rgba(23, 26, 36, 0.92);
  --scrim: rgba(0, 0, 0, 0.55);
  --plain: #1e222e;

  --hero-bg: linear-gradient(135deg, #171a24 0%, #1c2033 52%, #14262a 100%);
  --card-bg: linear-gradient(160deg, #171a24 0%, #1b1f2e 100%);
  --score-bg: linear-gradient(135deg, #171a24, #1c2033 60%, #14262a);
  --hero-panel-bg: rgba(30, 34, 46, 0.72);
  --feature-hover-border: #3a4152;

  --passage-text: #cdd3e2;

  --explain-bg: #14233f;
  --explain-border: #23406e;
  --explain-text: #bcd4f7;
  --explain-strong: #dbe9ff;

  --note-bg: #33260c;
  --note-border: #55401a;
  --note-text: #f3d9a4;

  --hl-bg: #4a3d10;

  --heat-1: #2c3163;
  --heat-2: #454a9e;
  --heat-3: #6360d4;
  --heat-4: #8b87f5;

  --on-success: #6ee7a8;
  --on-warn: #fbbf24;
  --on-danger: #fca5a5;
  --on-info: #93c5fd;
  --on-accent: #5eead4;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

/* 根画布也上底色，否则深色主题下滚动越界会露出白底 */
html { background: var(--bg); }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background-color: var(--bg);
  background-image: var(--bg-deco);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.35; letter-spacing: -0.01em; }
h1 { font-size: 30px; }
h2 { font-size: 21px; }
h3 { font-size: 17px; }
p { margin: 0 0 10px; }

::selection { background: var(--primary-ring); }

/* ============================ 布局 ============================ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--glass);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 22px;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 17px;
  color: var(--text);
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; }

.brand-mark {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, #7c6cf6 55%, var(--accent) 100%);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.28);
}
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--text-3); letter-spacing: 0; }

.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav::-webkit-scrollbar { display: none; }

.nav a {
  padding: 7px 13px;
  border-radius: 9px;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.nav a:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav a.active { background: var(--primary-soft); color: var(--primary-600); }

.streak-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--warn-soft);
  color: var(--on-warn);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

/* ======================== 移动端导航（汉堡 + 抽屉） ========================
   桌面端这三个元素全部 display:none，不参与布局也不占位；
   只有 ≤720px 时由下面的媒体查询启用。
   ======================================================================== */

.nav-toggle,
.nav-scrim,
.nav-drawer { display: none; }

.nav-toggle {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--primary-ring); }
.nav-toggle .nt-bar {
  display: block;
  width: 17px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-2);
  transition: transform 0.24s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.16s;
}
.nav-toggle.on { border-color: var(--primary-ring); background: var(--primary-soft); }
.nav-toggle.on .nt-bar { background: var(--primary-600); }
.nav-toggle.on .nt-bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.on .nt-bar:nth-child(2) { opacity: 0; }
.nav-toggle.on .nt-bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav-scrim {
  position: fixed;
  inset: var(--topbar-h) 0 0 0;
  z-index: 40;
  background: rgba(23, 26, 38, 0.36);
  opacity: 0;
  transition: opacity 0.2s;
}

.nav-drawer {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--topbar-h);
  z-index: 45;
  padding: 10px 14px calc(16px + env(safe-area-inset-bottom, 0px));
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 8px 10px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 6px;
}
.drawer-title {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
}
.drawer-streak {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--on-warn);
  background: var(--warn-soft);
  padding: 3px 10px;
  border-radius: 999px;
}

.drawer-group { margin-bottom: 6px; }
.drawer-group:last-child { margin-bottom: 0; }
.drawer-group-title {
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.09em;
  color: var(--text-3);
  padding: 8px 12px 4px;
}

.nav-drawer .drawer-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 12px;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 600;
  -webkit-tap-highlight-color: transparent;
}
.nav-drawer .drawer-link:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-drawer .drawer-link.active { background: var(--primary-soft); color: var(--primary-600); }
.nav-drawer .drawer-link .dl-ic { flex: 0 0 22px; text-align: center; font-size: 17px; }
.nav-drawer .drawer-link .dl-tx { flex: 1; min-width: 0; }
.nav-drawer .drawer-link .dl-go { color: var(--text-3); font-size: 16px; }
.nav-drawer .drawer-link .dl-here {
  font-size: 11.5px;
  font-weight: 700;
  color: var(--primary-600);
  background: var(--surface);
  border-radius: 999px;
  padding: 2px 9px;
}

/* 抽屉打开时由 JS 用 position:fixed 锁住背景滚动（见 app.js lockScroll），
   这里不用 overflow:hidden —— 那会把页面弹回顶部。 */
body.nav-open { touch-action: none; }

/* ============================ 手机断点 ============================ */

@media (max-width: 720px) {
  :root { --topbar-h: 56px; }

  .topbar-inner { padding: 0 14px; gap: 10px; }

  .brand { font-size: 15.5px; gap: 8px; }
  .brand-mark { width: 29px; height: 29px; font-size: 12px; border-radius: 9px; }
  .brand small { display: none; }

  /* 横向导航换成汉堡 + 抽屉 */
  .nav { display: none; }
  .nav-toggle { display: flex; }
  .nav-scrim { display: block; }
  .nav-drawer {
    display: block;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    opacity: 0;
    transition: transform 0.24s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.18s, visibility 0.24s;
  }
  .nav-drawer.on { visibility: visible; pointer-events: auto; transform: translateY(0); opacity: 1; }

  .streak-chip { display: none; }

  /* 横向导航隐藏后，靠这个把右侧控件推到边上 */
  .topbar-right { margin-left: auto; gap: 6px; }
  .icon-btn { width: 36px; height: 36px; border-radius: 10px; }

  /* 页面留白收紧 */
  .page { padding: 22px 14px 64px; }
  .page-head { margin-bottom: 18px; }
  .page-head h1, h1 { font-size: 24px; }
  h2 { font-size: 19px; }
  .card { padding: 16px; border-radius: var(--radius); }
  .card.tight { padding: 14px; }
  .card-head { flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }

  .grid { gap: 12px; }
  .stat { padding: 13px 13px; }
  .stat .value { font-size: 22px; }

  .hero { padding: 22px 18px; border-radius: 18px; }
  .hero h1 { font-size: 25px; }

  /* 分段控件挤在一起时改成横向滑动，别撑破卡片 */
  .seg { flex-wrap: nowrap; overflow-x: auto; max-width: 100%; scrollbar-width: none; }
  .seg::-webkit-scrollbar { display: none; }
  .seg button { flex: 0 0 auto; }

  /* 触摸目标抬高到 40px 上下 */
  .btn { padding: 10px 15px; }
  .btn-sm { padding: 8px 12px; }
  .seg button { padding: 9px 13px; }

  .swap-table { min-width: 520px; }
}

.page {
  max-width: 1140px;
  margin: 0 auto;
  padding: 30px 22px 80px;
}

.page-head { margin-bottom: 22px; }
.page-head .eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 6px;
}
.page-head p { color: var(--text-2); margin: 6px 0 0; max-width: 72ch; }

.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-side { grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); align-items: start; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-side { grid-template-columns: minmax(0, 1fr); }
  /* 四列统计块在平板上排两列，比堆成一条长列好扫 */
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ============================ 卡片 ============================ */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card.tight { padding: 16px; }
.card.flush { padding: 0; overflow: hidden; }

.card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.card-head h3 { flex: 1; }
.card-head .sub { font-size: 13px; color: var(--text-3); font-weight: 500; }

.section-title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 30px 0 14px;
}
.section-title h2 { flex: 0 0 auto; }
.section-title .hint { font-size: 13px; color: var(--text-3); }

/* ============================ 按钮 ============================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.08s, background 0.15s, border-color 0.15s, box-shadow 0.15s, color 0.15s;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-2); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--primary-ring); }

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.24);
}
.btn-primary:hover { background: var(--primary-600); border-color: var(--primary-600); }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; }
.btn-success:hover { background: #118a3e; border-color: #118a3e; }

.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #c22b39; border-color: #c22b39; }

.btn-ghost { background: transparent; border-color: transparent; color: var(--text-2); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

.btn-sm { padding: 6px 11px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 12px 24px; font-size: 15px; border-radius: 13px; }
.btn-block { width: 100%; }

.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }

/* ============================ 徽标 / 标签 ============================ */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  background: var(--surface-3);
  color: var(--text-2);
}
.tag-primary { background: var(--primary-soft); color: var(--primary-600); }
.tag-success { background: var(--success-soft); color: var(--on-success); }
.tag-warn { background: var(--warn-soft); color: var(--on-warn); }
.tag-danger { background: var(--danger-soft); color: var(--on-danger); }
.tag-info { background: var(--info-soft); color: var(--on-info); }
.tag-accent { background: var(--accent-soft); color: var(--on-accent); }

/* ============================ 统计块 ============================ */

.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 15px 16px;
  box-shadow: var(--shadow-xs);
}
.stat .label { font-size: 12.5px; color: var(--text-3); font-weight: 600; }
.stat .value { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; margin-top: 2px; }
.stat .value small { font-size: 13px; font-weight: 600; color: var(--text-3); margin-left: 3px; }
.stat .delta { font-size: 12.5px; color: var(--text-3); }

/* 卡片内嵌的小统计块 */
.stat-sm { padding: 12px 13px; background: var(--surface-2); box-shadow: none; }
.stat-sm .value { font-size: 21px; }
.stat-sm .label { font-size: 12px; }
.stat-sm .delta { font-size: 11.5px; }

/* ============================ 进度条 ============================ */

.bar {
  height: 9px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), #7c6cf6);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.bar.accent > i { background: linear-gradient(90deg, var(--accent), #34d399); }
.bar.success > i { background: linear-gradient(90deg, var(--success), #4ade80); }
.bar.warn > i { background: linear-gradient(90deg, var(--warn), #fbbf24); }

/* ============================ 表单控件 ============================ */

.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; font-weight: 700; color: var(--text-2); margin-bottom: 6px; }

input[type="text"], input[type="search"], select, textarea {
  width: 100%;
  padding: 9px 12px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}

.seg {
  display: inline-flex;
  gap: 3px;
  padding: 3px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  flex-wrap: wrap;
}
.seg button {
  padding: 7px 13px;
  border: none;
  background: transparent;
  border-radius: 9px;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.seg button:hover { color: var(--text); }
.seg button.active { background: var(--surface); color: var(--primary-600); box-shadow: var(--shadow-xs); }

/* ============================ 空状态 ============================ */

.empty {
  text-align: center;
  padding: 46px 20px;
  color: var(--text-3);
}
.empty .icon { font-size: 34px; margin-bottom: 10px; opacity: 0.75; }
.empty h3 { color: var(--text-2); margin-bottom: 6px; }

/* ============================ Toast ============================ */

#toast-host {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: 10px 18px;
  border-radius: 12px;
  background: #1f2333;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, 0.10);
  animation: toast-in 0.24s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}
.toast.ok { background: #12723c; }
.toast.warn { background: #a35a06; }
.toast.err { background: #b02334; }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(10px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

/* ============================ 首页 Hero ============================ */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 34px 30px;
  border-radius: 24px;
  background: var(--hero-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
@media (max-width: 900px) { .hero { grid-template-columns: minmax(0, 1fr); padding: 26px 22px; } }

.hero h1 { font-size: 34px; margin-bottom: 10px; }
.hero h1 .hl {
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead { font-size: 15.5px; color: var(--text-2); max-width: 46ch; }
.hero .meta { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

.hero-panel {
  background: var(--hero-panel-bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  backdrop-filter: blur(6px);
}
.hero-panel .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.hero-panel .row:last-child { border-bottom: none; }
.hero-panel .row b { font-size: 16px; }

/* ============================ 功能入口卡 ============================ */

.feature {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-xs);
  color: inherit;
  transition: transform 0.16s, box-shadow 0.16s, border-color 0.16s;
}
.feature:hover {
  text-decoration: none;
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--feature-hover-border);
}
.feature .ic {
  width: 42px; height: 42px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-size: 20px;
  margin-bottom: 12px;
  background: var(--primary-soft);
}
.feature .ic.a { background: var(--accent-soft); }
.feature .ic.b { background: var(--warn-soft); }
.feature .ic.c { background: var(--info-soft); }
.feature h3 { margin-bottom: 6px; }
.feature p { font-size: 13.5px; color: var(--text-2); margin: 0 0 12px; }
.feature .go { font-size: 13px; font-weight: 700; color: var(--primary); }

/* ============================ 词卡 ============================ */

.word-card {
  position: relative;
  min-height: 320px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  box-shadow: var(--shadow-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  user-select: none;
  transition: box-shadow 0.2s;
}
.word-card:hover { box-shadow: 0 4px 8px rgba(16,24,40,.05), 0 24px 52px rgba(16,24,40,.13); }
.word-card .wc-top { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.word-card .unit-badge {
  font-size: 12px; font-weight: 700; color: var(--text-3);
  background: var(--surface-2); padding: 3px 9px; border-radius: 999px;
}
.word-card .spk {
  margin-left: auto;
  border: 1px solid var(--border-strong);
  background: var(--plain);
  border-radius: 10px;
  padding: 5px 11px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  font-family: inherit;
}
.word-card .spk:hover { background: var(--surface-2); color: var(--primary); }
.word-card .word {
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 10px 0 4px;
  word-break: break-word;
}
.word-card .phon { font-family: var(--mono); font-size: 15px; color: var(--text-3); }
.word-card .divider { height: 1px; background: var(--border); margin: 18px 0; }
.word-card .answer { flex: 1; }
.word-card .pos {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 2px 8px;
  border-radius: 7px;
  margin-right: 8px;
}
.word-card .meaning { font-size: 21px; font-weight: 700; line-height: 1.5; }
.word-card .example {
  margin-top: 16px;
  padding: 13px 15px;
  background: var(--surface-2);
  border-left: 3px solid var(--primary);
  border-radius: 0 12px 12px 0;
  font-size: 14px;
}
.word-card .example .en { font-style: italic; color: var(--text); }
.word-card .example .cn { color: var(--text-2); font-size: 13.5px; margin-top: 4px; }
.word-card .hint-flip {
  position: absolute;
  right: 22px; bottom: 18px;
  font-size: 12.5px;
  color: var(--text-3);
}
.word-card .masked {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  color: var(--text-3);
  font-size: 14px;
  letter-spacing: 0.02em;
}

/* ============================ 题目 ============================ */

.q-item {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 12px;
}
.q-item .q-head { display: flex; gap: 10px; margin-bottom: 12px; }
.q-item .q-no {
  flex: 0 0 auto;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary-600);
  font-size: 13px;
  font-weight: 800;
  display: grid;
  place-items: center;
}
.q-item .q-text { font-size: 15px; font-weight: 600; line-height: 1.6; }

.opt {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 11px;
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 14.5px;
  transition: background 0.13s, border-color 0.13s;
}
.opt:hover { background: var(--surface-2); }
.opt .key {
  flex: 0 0 auto;
  width: 22px; height: 22px;
  border-radius: 7px;
  background: var(--surface-3);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 800;
  display: grid;
  place-items: center;
  margin-top: 1px;
}
.opt.picked { border-color: var(--primary); background: var(--primary-soft); }
.opt.picked .key { background: var(--primary); color: #fff; }
.opt.correct { border-color: var(--success); background: var(--success-soft); }
.opt.correct .key { background: var(--success); color: #fff; }
.opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.opt.wrong .key { background: var(--danger); color: #fff; }
.opt.locked { cursor: default; }

.explain {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 11px;
  background: var(--explain-bg);
  border: 1px solid var(--explain-border);
  font-size: 13.5px;
  color: var(--explain-text);
}
.explain b { color: var(--explain-strong); }

.passage {
  padding: 18px 20px;
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--passage-text);
  margin-bottom: 16px;
  max-height: 420px;
  overflow-y: auto;
}
.passage h4 { margin-bottom: 8px; color: var(--text); }
.passage p { margin-bottom: 10px; }
.passage .blank { font-weight: 800; color: var(--primary); }

/* ============================ 结果页 ============================ */

.score-hero {
  text-align: center;
  padding: 30px 20px;
  border-radius: 22px;
  background: var(--score-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.score-hero .num {
  font-size: 58px;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(120deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.score-hero .num small { font-size: 20px; color: var(--text-3); -webkit-text-fill-color: var(--text-3); }
.score-hero .verdict { font-size: 15px; color: var(--text-2); margin-top: 6px; }
.score-hero .split { display: flex; justify-content: center; gap: 26px; margin-top: 16px; flex-wrap: wrap; }
.score-hero .split div { font-size: 13px; color: var(--text-3); }
.score-hero .split b { display: block; font-size: 19px; color: var(--text); }

/* ============================ 日历热力图 ============================ */

.heat-wrap { display: flex; gap: 8px; align-items: flex-start; overflow-x: auto; padding-bottom: 4px; }
.heat-days {
  display: grid;
  grid-template-rows: repeat(7, 13px);
  gap: 3px;
  font-size: 10px;
  color: var(--text-3);
  padding-top: 15px;
}
.heat-days span { line-height: 13px; height: 13px; }
.heat-grid { display: flex; gap: 3px; }
.heat-col { display: grid; grid-template-rows: repeat(7, 13px); gap: 3px; }
.heat-col .m { font-size: 10px; color: var(--text-3); height: 12px; line-height: 12px; }
.heat-cell {
  width: 13px; height: 13px;
  border-radius: 3px;
  background: var(--surface-3);
  cursor: default;
}
.heat-cell[data-lv="1"] { background: var(--heat-1); }
.heat-cell[data-lv="2"] { background: var(--heat-2); }
.heat-cell[data-lv="3"] { background: var(--heat-3); }
.heat-cell[data-lv="4"] { background: var(--heat-4); }
.heat-legend { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--text-3); margin-top: 12px; }
.heat-legend i { width: 12px; height: 12px; border-radius: 3px; display: block; }

/* ============================ 写作模块 ============================ */

.tpl {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 12px;
  overflow: hidden;
}
.tpl summary {
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 700;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
}
.tpl summary::-webkit-details-marker { display: none; }
.tpl summary::after {
  content: "＋";
  margin-left: auto;
  color: var(--text-3);
  font-weight: 600;
}
.tpl[open] summary::after { content: "－"; }
.tpl summary:hover { background: var(--surface-2); }
.tpl .tpl-body { padding: 4px 18px 18px; border-top: 1px solid var(--border); }

.sent-list { list-style: none; padding: 0; margin: 0; }
.sent-list li {
  padding: 11px 0;
  border-bottom: 1px dashed var(--border);
}
.sent-list li:last-child { border-bottom: none; }
.sent-list .en { font-size: 14.5px; font-weight: 600; }
.sent-list .cn { font-size: 13px; color: var(--text-2); margin-top: 2px; }
.sent-list .use { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }

.model-essay {
  padding: 18px 20px;
  background: var(--surface-2);
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.9;
  white-space: pre-wrap;
  font-family: var(--font);
}
.model-essay .hl { background: var(--hl-bg); border-radius: 4px; padding: 0 3px; }
.model-essay .cnline { color: var(--text-3); font-size: 13px; }

.copy-btn {
  position: absolute;
  top: 12px; right: 12px;
}
.rel { position: relative; }

/* ============================ 看板图表 ============================ */

.chart-box { width: 100%; overflow: hidden; }
.chart-box svg { display: block; width: 100%; height: auto; }

.legend-row { display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--text-2); margin-top: 10px; }
.legend-row span { display: inline-flex; align-items: center; gap: 6px; }
.legend-row i { width: 10px; height: 10px; border-radius: 3px; display: block; }

/* ============================ 错题本 ============================ */

.wrong-item {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 10px;
  background: var(--surface);
}
.wrong-item .stem { font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.wrong-item .meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.wrong-item .ans-row { font-size: 13.5px; color: var(--text-2); }
.wrong-item .ans-row b.wrong { color: var(--danger); }
.wrong-item .ans-row b.right { color: var(--success); }

/* ============================ 列表 ============================ */

.list { list-style: none; padding: 0; margin: 0; }
.list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.list li:last-child { border-bottom: none; }
.list .grow { flex: 1; min-width: 0; }
.list .muted { color: var(--text-3); font-size: 13px; }

.kbd {
  font-family: var(--mono);
  font-size: 12px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--text-2);
}

.note {
  padding: 12px 15px;
  border-radius: var(--radius);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  font-size: 13.5px;
  color: var(--note-text);
}

footer.site-footer {
  max-width: 1140px;
  margin: 0 auto;
  padding: 26px 22px 44px;
  color: var(--text-3);
  font-size: 12.5px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================ 选套卡 / 底部操作条 ============================ */

.set-card { display: flex; flex-direction: column; }
.set-card .kind { margin-bottom: 10px; }
.set-card h3 { margin-bottom: 6px; }
.set-card p { font-size: 13.5px; color: var(--text-2); flex: 1; }
.set-card .btn-row { margin-top: 4px; }

.quiz-bar {
  position: sticky; bottom: 0; z-index: 40;
  margin-top: 16px;
  background: var(--glass-strong);
  backdrop-filter: saturate(180%) blur(10px);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 16px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  box-shadow: 0 -2px 18px rgba(16, 24, 40, 0.08);
}
.quiz-bar .info { font-size: 13.5px; color: var(--text-2); font-weight: 600; }
.quiz-bar .grow { flex: 1; }
.timer { font-family: var(--mono); font-weight: 700; color: var(--text); }

.hidden { display: none !important; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.muted { color: var(--text-3); }
.small { font-size: 13px; }
.strong { font-weight: 700; }

/* ==========================================================================
   通用组件（1.2 公共模块）
   主题切换按钮 / 档案入口 / 确认弹窗 / 加载 / 空状态 / 错误页
   ========================================================================== */

/* 顶栏右侧的图标按钮，主题切换与档案入口共用同一套外观 */
.icon-btn {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 16px;
  font-family: inherit;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.icon-btn:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--primary-ring); }
.icon-btn .ib-avatar { font-size: 17px; }

/* 档案入口：图标 + 名字，宽屏才显示名字 */
.who {
  width: auto;
  padding: 0 11px 0 9px;
  gap: 7px;
  grid-auto-flow: column;
  align-items: center;
}
.who .who-name {
  font-size: 13.5px;
  font-weight: 700;
  max-width: 84px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
@media (max-width: 900px) { .who .who-name { display: none; } .who { padding: 0; width: 38px; } }

/* ---- 确认弹窗 ---- */

.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: grid;
  place-items: center;
  padding: 20px;
  background: var(--scrim);
  backdrop-filter: blur(3px);
  animation: mask-in 0.16s ease-out;
}
@keyframes mask-in { from { opacity: 0; } to { opacity: 1; } }

.modal {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 22px;
  animation: modal-in 0.2s cubic-bezier(0.2, 0.9, 0.3, 1.1);
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(12px) scale(0.97); }
  to { opacity: 1; transform: none; }
}
.modal h3 { font-size: 17px; margin-bottom: 8px; }
.modal .modal-body { font-size: 14px; color: var(--text-2); line-height: 1.7; }
.modal .modal-body p:last-child { margin-bottom: 0; }
.modal .modal-field { margin-top: 14px; }
.modal .modal-foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

/* ---- 加载 ---- */

.load-mask {
  position: fixed;
  inset: 0;
  z-index: 290;
  display: grid;
  place-items: center;
  background: var(--scrim);
  backdrop-filter: blur(2px);
}
.load-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 22px 30px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
}
.spinner {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 3px solid var(--surface-3);
  border-top-color: var(--primary);
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 按钮内的行内小转圈 */
.btn .spinner {
  width: 14px; height: 14px; border-width: 2px;
  border-color: rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
}

/* ---- 空状态 / 错误块 ---- */

.empty .act { margin-top: 14px; }
.empty .icon.err { color: var(--danger); opacity: 1; }

.err-block {
  text-align: center;
  padding: 40px 22px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--surface-2);
}
.err-block .icon { font-size: 32px; margin-bottom: 8px; }
.err-block h3 { color: var(--text); margin-bottom: 6px; }
.err-block p { color: var(--text-2); font-size: 13.5px; max-width: 46ch; margin: 0 auto 4px; }
.err-block .detail {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  word-break: break-all;
}
.err-block .act { margin-top: 16px; }

/* ==========================================================================
   个人中心 / 设置
   ========================================================================== */

/* 开关：用 aria-checked 表达状态，读屏也能正确播报 */
.switch {
  position: relative;
  width: 44px;
  height: 26px;
  flex: 0 0 auto;
  padding: 0;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface-3);
  cursor: pointer;
  transition: background 0.18s, border-color 0.18s;
  -webkit-tap-highlight-color: transparent;
}
.switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--plain);
  box-shadow: var(--shadow-xs);
  transition: transform 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}
.switch[aria-checked="true"] { background: var(--primary); border-color: var(--primary); }
.switch[aria-checked="true"]::after { transform: translateX(18px); background: #fff; }
.switch:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--primary-ring); }

.set-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
}
.set-row:last-child { border-bottom: none; }
.set-row .sr-main { flex: 1; min-width: 0; }
.set-row .sr-main b { display: block; font-size: 14px; font-weight: 600; }
.set-row .sr-main span { font-size: 12.5px; color: var(--text-3); }
.set-row .sr-ctl { flex: 0 0 auto; display: flex; align-items: center; gap: 8px; }
.set-row .sr-ctl input[type="number"] { width: 84px; }
.set-row select { width: auto; min-width: 130px; }

/* 档案卡片 */
.prof-card {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.prof-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.prof-card.on { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-ring); }
.prof-av {
  width: 44px; height: 44px;
  flex: 0 0 auto;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-size: 22px;
  background: var(--surface-2);
}
.prof-meta { flex: 1; min-width: 0; }
.prof-meta b { display: block; font-size: 15px; }
.prof-meta span { font-size: 12.5px; color: var(--text-3); }

/* 头像选择 */
.av-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.av-opt {
  width: 42px; height: 42px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  font-size: 20px;
  line-height: 1;
  display: grid;
  place-items: center;
  cursor: pointer;
  font-family: inherit;
}
.av-opt.on { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-ring); }

/* 大号当前档案横幅 */
.me-hero {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: var(--hero-bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.me-hero .me-av {
  width: 64px; height: 64px;
  flex: 0 0 auto;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
}
.me-hero .me-info { flex: 1; min-width: 200px; }
.me-hero h2 { font-size: 22px; margin-bottom: 4px; }
.me-hero .me-sub { font-size: 13.5px; color: var(--text-2); }

/* 学习时长柱状图 */
.bars {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 120px;
  padding-top: 8px;
}
.bars .b-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 4px; min-width: 0; }
.bars .b-bar {
  width: 100%;
  max-width: 26px;
  border-radius: 5px 5px 2px 2px;
  background: linear-gradient(180deg, var(--primary), #7c6cf6);
  min-height: 2px;
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.bars .b-bar.zero { background: var(--surface-3); }
.bars .b-lab { font-size: 10px; color: var(--text-3); white-space: nowrap; }

/* ==========================================================================
   阅读专项
   ========================================================================== */

/* 文章里的生词：点一下出释义 */
.passage .wd {
  cursor: pointer;
  border-bottom: 1px dashed var(--border-strong);
  padding-bottom: 1px;
  transition: background 0.13s, color 0.13s;
  border-radius: 3px;
}
.passage .wd:hover { background: var(--primary-soft); color: var(--primary-600); }
.passage .wd.on { background: var(--primary-soft); color: var(--primary-600); }

/* 选词填空：空格 + 备选词池 */
.blank-slot {
  display: inline-block;
  min-width: 92px;
  padding: 1px 8px;
  margin: 0 2px;
  border-bottom: 2px solid var(--primary);
  text-align: center;
  font-weight: 700;
  color: var(--primary-600);
  cursor: pointer;
  vertical-align: baseline;
}
.blank-slot.filled { background: var(--primary-soft); border-radius: 5px 5px 0 0; }
.blank-slot.right { border-bottom-color: var(--success); color: var(--on-success); background: var(--success-soft); }
.blank-slot.wrong { border-bottom-color: var(--danger); color: var(--on-danger); background: var(--danger-soft); }

.word-pool { display: flex; flex-wrap: wrap; gap: 8px; }
.word-pool .wp {
  padding: 7px 13px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  color: var(--text);
  cursor: pointer;
  transition: background 0.13s, border-color 0.13s, opacity 0.13s;
}
.word-pool .wp:hover { background: var(--surface-2); }
.word-pool .wp.used { opacity: 0.35; }
.word-pool .wp.sel { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-600); }
.word-pool .wp.right { border-color: var(--success); background: var(--success-soft); color: var(--on-success); opacity: 1; }
.word-pool .wp.wrong { border-color: var(--danger); background: var(--danger-soft); color: var(--on-danger); opacity: 1; }

/* 段落匹配 */
.match-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.match-row:last-child { border-bottom: none; }
.match-row .mr-q { flex: 1; min-width: 0; font-size: 14.5px; }
.match-row .mr-no { flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px; background: var(--surface-3); color: var(--text-2); font-size: 12.5px; font-weight: 800; display: grid; place-items: center; }
.match-row select { width: auto; min-width: 108px; }
.match-row.right select { border-color: var(--success); }
.match-row.wrong select { border-color: var(--danger); }

/* 生词释义浮层 */
.gloss-pop {
  position: absolute;
  z-index: 120;
  max-width: 260px;
  padding: 11px 14px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  font-size: 13.5px;
}
.gloss-pop .gp-word { font-weight: 800; font-size: 15px; }
.gloss-pop .gp-phon { font-family: var(--mono); font-size: 12px; color: var(--text-3); }
.gloss-pop .gp-cn { margin-top: 5px; }
.gloss-pop .gp-act { margin-top: 9px; display: flex; gap: 8px; }

/* ==========================================================================
   错题本 / 全真考场
   ========================================================================== */

.tag-btn {
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--surface);
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.13s, border-color 0.13s, color 0.13s;
}
.tag-btn:hover { background: var(--surface-2); }
.tag-btn.on { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-600); }

/* 考场计时条 */
.exam-bar {
  position: sticky;
  top: var(--topbar-h);
  z-index: 42;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--glass-strong);
  backdrop-filter: saturate(180%) blur(10px);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.exam-bar .eb-stage { font-size: 14px; font-weight: 700; }
.exam-bar .eb-timer {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.exam-bar .eb-timer.urgent { color: var(--danger); }
.exam-bar .grow { flex: 1; }

/* 考场阶段指示 */
.stages { display: flex; gap: 6px; flex-wrap: wrap; }
.stages .st {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 700;
  background: var(--surface-2);
  color: var(--text-3);
}
.stages .st.on { background: var(--primary-soft); color: var(--primary-600); }
.stages .st.done { background: var(--success-soft); color: var(--on-success); }

/* 分数构成表 */
.score-grid { display: grid; gap: 10px; }
.score-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 13px;
  border-radius: 11px;
  background: var(--surface-2);
  font-size: 14px;
}
.score-row .sr-name { flex: 1; min-width: 0; font-weight: 600; }
.score-row .sr-raw { font-size: 12.5px; color: var(--text-3); }
.score-row .sr-val { font-weight: 800; font-family: var(--mono); }

/* ==========================================================================
   会员 / 社群 / 管理台
   ========================================================================== */

.plan-grid { display: grid; gap: 12px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { .plan-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .plan-grid { grid-template-columns: minmax(0, 1fr); } }

.plan {
  position: relative;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
}
.plan.on { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-ring); }
.plan .p-tag {
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--warn);
  color: #3b2503;
  font-size: 11.5px;
  font-weight: 800;
  white-space: nowrap;
}
.plan .p-name { font-size: 15px; font-weight: 700; }
.plan .p-price { font-size: 28px; font-weight: 800; letter-spacing: -0.02em; margin: 6px 0 2px; }
.plan .p-price small { font-size: 13px; font-weight: 600; color: var(--text-3); }
.plan .p-days { font-size: 12.5px; color: var(--text-3); margin-bottom: 12px; }

.rights { display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 640px) { .rights { grid-template-columns: minmax(0, 1fr); } }
.right-row { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; }
.right-row .rr-ic { flex: 0 0 auto; width: 22px; height: 22px; border-radius: 7px; display: grid; place-items: center; background: var(--success-soft); color: var(--on-success); font-size: 12px; font-weight: 800; }

/* 排行榜 */
.rank-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.rank-row:last-child { border-bottom: none; }
.rank-row .rk-no {
  flex: 0 0 auto;
  width: 26px; height: 26px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 12.5px;
  font-weight: 800;
  background: var(--surface-3);
  color: var(--text-2);
}
.rank-row.me { background: var(--primary-soft); border-radius: 10px; padding-left: 10px; padding-right: 10px; }
.rank-row .rk-no.top { background: var(--warn); color: #3b2503; }
.rank-row .rk-name { flex: 1; min-width: 0; font-weight: 600; }
.rank-row .rk-val { font-family: var(--mono); font-weight: 700; }

/* 演示标注条：凡是本地演示、真实版需服务端的地方都挂一条 */
.demo-note {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  padding: 11px 14px;
  border-radius: 12px;
  background: var(--info-soft);
  border: 1px dashed var(--info);
  font-size: 13px;
  color: var(--on-info);
  margin-bottom: 16px;
}
.demo-note b { font-weight: 800; }
.demo-note .dn-ic { flex: 0 0 auto; }

/* ---- 阅读专项补充 ---- */
.blank-slot.sel {
  border-bottom-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-600);
  box-shadow: 0 0 0 2px var(--primary-soft);
}
.match-para { line-height: 1.85; }
.match-para .para-key {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  margin-right: 6px;
  border-radius: 7px;
  background: var(--primary-soft);
  color: var(--primary-600);
  font-size: 12.5px;
  font-weight: 800;
  vertical-align: 1px;
}
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }

/* ---- 词级对照 diff（听力听写校对 / 翻译译文对比共用） ---- */
.dict-diff {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  line-height: 2;
}
.dict-diff .tok {
  display: inline-block;
  padding: 2px 7px;
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
}
.dict-diff .tok.ok { background: var(--success-soft); color: var(--on-success); border-color: var(--border-strong); }
.dict-diff .tok.miss { background: var(--danger-soft); color: var(--on-danger); border-color: var(--border-strong); text-decoration: line-through; }
.dict-diff .tok.extra { background: var(--warn-soft); color: var(--on-warn); border-color: var(--note-border); }
.diff-legend { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 10px; font-size: 12.5px; color: var(--text-3); }
.diff-legend i { display: inline-block; width: 12px; height: 12px; border-radius: 4px; margin-right: 5px; vertical-align: -1px; }
.diff-legend .lg-ok { background: var(--success-soft); border: 1px solid var(--border-strong); }
.diff-legend .lg-miss { background: var(--danger-soft); border: 1px solid var(--border-strong); }
.diff-legend .lg-extra { background: var(--warn-soft); border: 1px solid var(--note-border); }

/* ---- 作文批改（本地规则版） ---- */
.score-bars { display: grid; gap: 10px; margin-top: 14px; }
.score-bar { display: grid; grid-template-columns: 104px minmax(0, 1fr) 62px; gap: 12px; align-items: center; }
.score-bar .sb-name { font-size: 13.5px; font-weight: 700; }
.score-bar .sb-track { height: 9px; border-radius: 99px; background: var(--surface-3); overflow: hidden; }
.score-bar .sb-fill { height: 100%; border-radius: 99px; background: var(--primary); transition: width .45s ease; }
.score-bar .sb-fill.warn { background: var(--warn); }
.score-bar .sb-fill.bad { background: var(--danger); }
.score-bar .sb-val { font-family: var(--mono); font-size: 13px; text-align: right; font-weight: 700; }
.grade-badge {
  display: inline-grid; place-items: center;
  width: 62px; height: 62px; border-radius: 20px;
  font-size: 26px; font-weight: 800;
  background: var(--primary-soft); color: var(--primary-600);
}
.grade-badge.b { background: var(--info-soft); color: var(--on-info); }
.grade-badge.c { background: var(--warn-soft); color: var(--on-warn); }
.grade-badge.d, .grade-badge.e { background: var(--danger-soft); color: var(--on-danger); }
.issue-row {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 11px 13px; border-radius: 11px; margin-bottom: 8px;
  border: 1px solid var(--border); background: var(--surface);
}
.issue-row .sev { flex: 0 0 auto; width: 8px; height: 8px; border-radius: 99px; margin-top: 7px; }
.issue-row .sev.high { background: var(--danger); }
.issue-row .sev.mid { background: var(--warn); }
.issue-row .sev.low { background: var(--info); }
.issue-row .fix { font-family: var(--mono); font-size: 13px; color: var(--success); }
.issue-row .why { font-size: 12.5px; color: var(--text-3); margin-top: 3px; }
.sent-chip {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 10px 12px; border-radius: 11px; margin-bottom: 8px;
  background: var(--surface-2); border: 1px solid var(--border);
}
.sent-chip .sc-no {
  flex: 0 0 auto; width: 24px; height: 24px; border-radius: 8px;
  background: var(--surface-3); color: var(--text-2);
  font-size: 12px; font-weight: 800; display: grid; place-items: center;
}
.sent-chip .sc-txt { flex: 1; min-width: 0; font-size: 14px; line-height: 1.7; }
.sent-chip .sc-meta { font-size: 12.5px; color: var(--text-3); margin-top: 5px; }
.grade-editor {
  width: 100%; min-height: 260px; resize: vertical;
  font-family: var(--sans); font-size: 15px; line-height: 1.9;
  padding: 14px 16px; border-radius: 14px;
  border: 1px solid var(--border-strong); background: var(--plain);
  color: var(--text);
}
.grade-editor:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
@media (max-width: 720px) {
  .score-bar { grid-template-columns: 84px minmax(0, 1fr) 52px; gap: 8px; }
  .score-bar .sb-name { font-size: 12.5px; }
}

@media (max-width: 900px) {
  #banked-wrap, #match-wrap { grid-template-columns: minmax(0, 1fr) !important; }
  #banked-wrap > .card:last-child, #match-wrap > .card:last-child { position: static !important; }
}

/* ---- 表格与步骤清单（冲刺页 / 写作页共用） ---- */
  .swap-table { width: 100%; border-collapse: collapse; font-size: 14px; }
  .swap-table th {
    text-align: left; font-size: 12.5px; color: var(--text-3);
    padding: 8px 10px; border-bottom: 1px solid var(--border); font-weight: 700;
  }
  .swap-table td { padding: 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
  .swap-table tr:last-child td { border-bottom: none; }
  .swap-table .basic { color: var(--text-3); }
  .swap-table .adv { font-weight: 700; color: var(--primary-600); }
  .swap-table .note { color: var(--text-2); font-size: 13px; }

  .mistake-item {
    padding: 13px 15px; border-radius: 12px; margin-bottom: 10px;
    border: 1px solid var(--border); background: var(--surface);
  }
  .mistake-item .wrong { color: var(--danger); text-decoration: line-through; }
  .mistake-item .right { color: var(--success); font-weight: 700; }
  .mistake-item .why { font-size: 13px; color: var(--text-2); margin-top: 6px; }

  .skill-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
  .skill-step {
    display: flex; gap: 12px; padding: 13px 0;
    border-bottom: 1px dashed var(--border);
  }
  .skill-step:last-child { border-bottom: none; }
  .skill-step .idx {
    flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px;
    background: var(--primary-soft); color: var(--primary-600);
    font-size: 13px; font-weight: 800; display: grid; place-items: center;
  }

/* ============================ 学情报告（P0 · 3.5） ============================ */

.score-bar .sb-fill.none { background: var(--surface-3); }
.card.tight { padding: 12px 14px; }

/* 五维画像的横向条：名称 / 轨道 / 分值 / 等级 */
.dim-row {
  display: grid; grid-template-columns: 96px minmax(0, 1fr) 46px 62px;
  gap: 10px; align-items: center; padding: 7px 0;
}
.dim-row .dr-name { font-size: 13.5px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dim-row .dr-track {
  height: 10px; border-radius: 99px; background: var(--surface-3); overflow: hidden;
}
.dim-row .dr-fill {
  display: block; height: 100%; border-radius: 99px;
  background: var(--primary); transition: width .45s ease;
}
.dim-row .dr-fill.warn { background: var(--warn); }
.dim-row .dr-fill.bad { background: var(--danger); }
.dim-row .dr-fill.none { background: var(--border-strong); }
.dim-row .dr-val { font-family: var(--mono); font-size: 13px; font-weight: 700; text-align: right; }
.dim-row .dr-lvl {
  font-size: 11.5px; font-weight: 700; text-align: center;
  padding: 2px 0; border-radius: 99px; background: var(--surface-3); color: var(--text-3);
}
.dim-row .dr-lvl.great { background: var(--success-soft, var(--primary-soft)); color: var(--success); }
.dim-row .dr-lvl.ok { background: var(--surface-3); color: var(--text-2); }
.dim-row .dr-lvl.weak { background: rgba(217, 48, 37, .12); color: var(--danger); }
.dim-row .dr-lvl.none { background: var(--surface-3); color: var(--text-3); }

/* 行内等级徽章 */
.lvl {
  display: inline-block; padding: 2px 9px; border-radius: 99px;
  font-size: 11.5px; font-weight: 700;
  background: var(--surface-3); color: var(--text-2);
}
.lvl.great { background: var(--primary-soft); color: var(--primary-600); }
.lvl.weak { background: rgba(217, 48, 37, .12); color: var(--danger); }
.lvl.none { background: var(--surface-3); color: var(--text-3); }

/* 近 7 天柱状 */
.spark { display: flex; align-items: flex-end; gap: 8px; height: 130px; padding-top: 8px; }
.spark-col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; height: 100%; gap: 6px; }
.spark-bar {
  width: 100%; max-width: 44px; border-radius: 8px 8px 4px 4px;
  background: var(--primary-soft); border: 1px solid var(--primary);
  transition: height .45s ease;
}
.spark-bar.on { background: var(--primary); }
.spark-bar.off { background: var(--surface-3); border-color: var(--border); }
.spark-lb { font-size: 11.5px; color: var(--text-3); font-family: var(--mono); }

/* 智能推送卡片的图标 */
.push-ic {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: 13px;
  display: grid; place-items: center; font-size: 20px;
  background: var(--surface-2); border: 1px solid var(--border);
}

@media (max-width: 720px) {
  .dim-row { grid-template-columns: 74px minmax(0, 1fr) 40px 54px; gap: 7px; }
  .dim-row .dr-name { font-size: 12.5px; }
  .spark { gap: 5px; height: 110px; }
}

@media print {
  .topbar, .btn, footer.site-footer { display: none; }
  body { background: #fff; }
}
