/* ============================================================
   わかる日本語 — Apple Liquid Glass Design System
   ============================================================ */

/* ---------- 主题令牌 ---------- */
:root {
  --bg-primary: #f2f2f7;
  --bg-deep: #e9e9f0;

  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-hover: rgba(255, 255, 255, 0.9);
  --glass-bg-strong: rgba(255, 255, 255, 0.86);
  /* 二级菜单是浮层，底下压着正文，比常驻的导航条更需要"读得清" */
  --menu-bg: rgba(255, 255, 255, 0.97);
  /* Liquid Gooey 用的不透明底色：goo 滤镜按 alpha 做阈值（>0.44 变实、<0.44 抹掉），
     半透明的块会被整个"抹"没，所以液体块只能用不透明色。 */
  --goo-hover: #ececf2;
  --glass-bg-sunken: rgba(0, 0, 0, 0.035);
  --glass-border: rgba(0, 0, 0, 0.08);
  --glass-border-hover: rgba(0, 0, 0, 0.15);
  --glass-blur: saturate(180%) blur(30px);

  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;
  --text-invert: #ffffff;

  --accent: #007aff;
  --accent-hover: #0066d6;
  --accent-dim: rgba(0, 122, 255, 0.1);
  --accent-glow: rgba(0, 122, 255, 0.22);

  --gold: #a9781f;
  --gold-soft: rgba(169, 120, 31, 0.12);
  --red: #ff3b30;
  --green: #34c759;
  --purple: #af52de;
  --teal: #00c7be;
  --orange: #ff9500;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.14), 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);

  --radius-sm: 8px;
  --radius: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  --spring: cubic-bezier(0.25, 0.1, 0.25, 1);
  --spring-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out: cubic-bezier(0.16, 0.75, 0.35, 1);

  --nav-h: 68px;
  --maxw: 1180px;

  /* 句型角色配色 */
  --r-topic: #ff9500;
  --r-subj: #0a84ff;
  --r-obj: #af52de;
  --r-pred: #ff3b30;
  --r-particle: #34c759;
  --r-mod: #00c7be;
  --r-time: #ff2d95;
}

html[data-theme="dark"] {
  --bg-primary: #0a0b0f;
  --bg-deep: #05060a;

  --glass-bg: rgba(28, 30, 39, 0.66);
  --glass-bg-hover: rgba(40, 43, 55, 0.8);
  --glass-bg-strong: rgba(24, 26, 34, 0.86);
  --menu-bg: rgba(26, 28, 36, 0.97);
  --goo-hover: #1e212a;
  --glass-bg-sunken: rgba(255, 255, 255, 0.045);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-hover: rgba(255, 255, 255, 0.2);

  --text-primary: #f2f4f8;
  --text-secondary: rgba(242, 244, 248, 0.66);
  --text-tertiary: rgba(242, 244, 248, 0.4);
  --text-invert: #0a0b0f;

  --accent: #0a84ff;
  --accent-hover: #3d9bff;
  --accent-dim: rgba(10, 132, 255, 0.16);
  --accent-glow: rgba(10, 132, 255, 0.3);

  --gold: #f8cc70;
  --gold-soft: rgba(248, 204, 112, 0.14);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 14px 44px rgba(0, 0, 0, 0.55), 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 24px 70px rgba(0, 0, 0, 0.6), 0 10px 24px rgba(0, 0, 0, 0.45);
  --shadow-glass: 0 8px 34px rgba(0, 0, 0, 0.45), 0 2px 10px rgba(0, 0, 0, 0.3);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo",
    "Helvetica Neue", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.65;
  letter-spacing: -0.1px;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s var(--spring), color 0.4s var(--spring);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }
::selection { background: var(--accent-glow); }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--glass-border-hover); border-radius: 9999px;
  border: 3px solid transparent; background-clip: content-box;
}

/* ---------- 背景光球 ---------- */
.bg-aura { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.aura {
  position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.4;
  animation: auraFloat 22s ease-in-out infinite;
}
.aura-1 { width: 620px; height: 620px; background: radial-gradient(circle, rgba(0,122,255,0.28), transparent 70%); top: -16%; left: -12%; animation-delay: 0s; }
.aura-2 { width: 520px; height: 520px; background: radial-gradient(circle, rgba(255,59,48,0.18), transparent 70%); top: 36%; right: -10%; animation-delay: -7s; }
.aura-3 { width: 460px; height: 460px; background: radial-gradient(circle, rgba(175,82,222,0.18), transparent 70%); bottom: 2%; left: 26%; animation-delay: -14s; }
.aura-4 { width: 380px; height: 380px; background: radial-gradient(circle, rgba(52,199,89,0.14), transparent 70%); top: 14%; left: 46%; animation-delay: -5s; }

html[data-theme="dark"] .aura { opacity: 0.5; }

@keyframes auraFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(40px, -30px) scale(1.08); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(-30px, -10px) scale(1.05); }
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed; top: 16px; left: 50%; transform: translateX(-50%);
  width: calc(100% - 32px); max-width: var(--maxw); z-index: 100;
  display: flex; align-items: center; gap: 14px;
  padding: 10px 14px;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glass);
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; padding-left: 4px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 11px; flex-shrink: 0;
  display: grid; place-items: center;
  font-size: 21px; font-weight: 700; color: var(--text-invert);
  background: linear-gradient(145deg, var(--accent), #5856d6);
  box-shadow: 0 3px 10px var(--accent-glow);
}
.brand-text { display: flex; align-items: center; line-height: 1.15; }
.brand-text strong { font-size: 16px; font-weight: 700; letter-spacing: -0.3px; }

/* 一级入口并排：首页 | 基础 语法 表达 实战 | 练习。
   激活底色不画在 chip 上，而是交给下面 .liquid-layer 里的液态块 ——
   只有把块放进带 goo 滤镜的层里，移动时才会和拖尾融成一条液柱。
   chip 自身留 position/z-index，保证文字始终压在液态块之上。 */
.nav-scroll {
  display: flex; align-items: center; gap: 2px; flex: 1; min-width: 0;
  position: relative; z-index: 2;
  overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none;
  padding: 3px 0 3px 4px;
  /* 只在右缘渐隐（横向滚动提示）。左边不能渐隐：首个 chip 的液态块会被切掉一刀，
     看起来就像和左侧的品牌"叠"在一起。 */
  mask-image: linear-gradient(90deg, #000 0, #000 calc(100% - 8px), transparent 100%);
}
.nav-scroll::-webkit-scrollbar { display: none; }

.nav-chip {
  position: relative; z-index: 1;
  padding: 7px 14px; font-size: 13.5px; font-weight: 500; white-space: nowrap;
  border-radius: var(--radius-full); color: var(--text-secondary);
  background: none;
  transition: color 0.22s var(--spring);
}
.nav-chip:hover { color: var(--text-primary); }
.nav-chip.active { color: #fff; font-weight: 600; }

/* 分组竖线：放在「首页」之后和「练习」之前 */
.nav-div {
  width: 1px; height: 16px; flex-shrink: 0; align-self: center;
  background: var(--glass-border); border-radius: 1px; margin: 0 6px;
}

.nav-tools { display: flex; gap: 6px; flex-shrink: 0; }
.icon-btn {
  width: 36px; height: 36px; border-radius: var(--radius-full);
  display: grid; place-items: center; color: var(--text-secondary);
  background: var(--glass-bg-sunken); border: 1px solid transparent;
  transition: all 0.22s var(--spring);
}
.icon-btn:hover { color: var(--text-primary); background: var(--glass-bg-hover); border-color: var(--glass-border); transform: translateY(-1px); }
.icon-btn:active { transform: scale(0.94); }
.icon-btn.on { color: var(--accent); background: var(--accent-dim); }
html[data-theme="dark"] .i-sun { display: none; }
html[data-theme="light"] .i-moon { display: none; }

/* ---------- 视图容器 ---------- */
.view {
  position: relative; z-index: 1;
  max-width: var(--maxw); margin: 0 auto;
  padding: calc(var(--nav-h) + 46px) 20px 60px;
}
/* 换页时由 JS 挂上 .enter 重播一次「液体落定」：从下方一浅层浮起来再收拢 */
.view.enter { animation: viewIn 0.42s var(--ease-out); }
@keyframes viewIn {
  from { opacity: 0; transform: translateY(11px) scale(0.996); }
  to { opacity: 1; transform: none; }
}

/* ---------- 通用排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 11.5px; font-weight: 700; letter-spacing: 1.1px; text-transform: uppercase;
  color: var(--accent); padding: 5px 13px; border-radius: var(--radius-full);
  background: var(--accent-dim); margin-bottom: 16px;
}
.eyebrow.gold { color: var(--gold); background: var(--gold-soft); }

h1.page-title { font-size: clamp(28px, 4.6vw, 44px); font-weight: 800; letter-spacing: -1.2px; line-height: 1.15; }
h2.sec-title { font-size: clamp(21px, 3vw, 29px); font-weight: 750; letter-spacing: -0.6px; line-height: 1.25; }
h3 { font-size: 17px; font-weight: 700; letter-spacing: -0.3px; }

.lead { font-size: 16px; color: var(--text-secondary); max-width: 720px; margin-top: 14px; }
.muted { color: var(--text-secondary); }
.dim { color: var(--text-tertiary); }

.page-head { margin-bottom: 34px; }
.page-head .lead { margin-top: 12px; }

.sec { margin-top: 52px; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.sec-head p { font-size: 14px; color: var(--text-secondary); margin-top: 6px; max-width: 620px; }

.jp { font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo", "PingFang SC", sans-serif; }

/* ---------- 玻璃卡片 ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glass);
}

.card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glass);
  padding: 22px;
  transition: transform 0.32s var(--spring), box-shadow 0.32s var(--spring), border-color 0.32s var(--spring);
}

.card.hoverable { cursor: pointer; }
.card.hoverable:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--glass-border-hover); }

.grid { display: grid; gap: 16px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-auto { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

/* ---------- 徽标 / 标签 ---------- */
.pill {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 650; padding: 3.5px 10px;
  border-radius: var(--radius-full); background: var(--glass-bg-sunken);
  color: var(--text-secondary); letter-spacing: 0.1px; white-space: nowrap;
}
.pill.blue { background: var(--accent-dim); color: var(--accent); }
.pill.gold { background: var(--gold-soft); color: var(--gold); }
.pill.red { background: rgba(255, 59, 48, 0.12); color: var(--red); }
.pill.green { background: rgba(52, 199, 89, 0.14); color: #1f9d47; }
.pill.purple { background: rgba(175, 82, 222, 0.13); color: var(--purple); }
html[data-theme="dark"] .pill.green { color: #4ade80; }
html[data-theme="dark"] .pill.red { color: #ff6961; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: var(--radius-full);
  font-size: 15px; font-weight: 600; letter-spacing: -0.2px;
  position: relative; overflow: hidden;
  transition: all 0.25s var(--spring);
}
.btn::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.22), transparent);
  opacity: 0; transition: opacity 0.25s; pointer-events: none;
}
.btn:hover::after { opacity: 1; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 3px 12px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px var(--accent-glow); }
.btn-primary:active { transform: scale(0.97); }
.btn-ghost { background: var(--glass-bg); border: 1px solid var(--glass-border); color: var(--text-primary); }
.btn-ghost:hover { background: var(--glass-bg-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost:active { transform: scale(0.97); }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ---------- Hero ---------- */
.hero { padding: 16px 0 8px; }
.hero-title {
  font-size: clamp(34px, 6.4vw, 62px); font-weight: 800;
  letter-spacing: -2px; line-height: 1.08;
}
.hero-title .hl { color: var(--gold); }
.hero-lead { font-size: clamp(15px, 1.7vw, 17.5px); color: var(--text-secondary); max-width: 640px; margin-top: 20px; line-height: 1.75; }
.hero-lead strong { color: var(--text-primary); font-weight: 650; }
.hero-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }

.hero-stats { display: flex; gap: 34px; margin-top: 40px; flex-wrap: wrap; }
.hero-stat .n {
  font-size: 34px; font-weight: 800; letter-spacing: -1.4px;
  color: var(--gold); font-variant-numeric: tabular-nums; line-height: 1.1;
}
.hero-stat .l { font-size: 12.5px; color: var(--text-tertiary); margin-top: 4px; }

/* ---------- 方法论卡 ---------- */
.method {
  padding: 24px; position: relative; overflow: visible;
}
.method-ico {
  width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center;
  margin-bottom: 15px; color: #fff;
}
.method-ico.b1 { background: linear-gradient(145deg, #0a84ff, #5856d6); box-shadow: 0 4px 14px var(--accent-glow); }
.method-ico.b2 { background: linear-gradient(145deg, #ff9500, #ff3b30); box-shadow: 0 4px 14px rgba(255, 149, 0, 0.3); }
.method-ico.b3 { background: linear-gradient(145deg, #34c759, #00c7be); box-shadow: 0 4px 14px rgba(52, 199, 89, 0.3); }
.method h3 { margin-bottom: 8px; }
.method p { font-size: 13.8px; color: var(--text-secondary); line-height: 1.7; }
.method .num-badge {
  position: absolute; top: 20px; right: 22px;
  font-size: 30px; font-weight: 800; color: var(--text-tertiary); opacity: 0.34;
  letter-spacing: -1.5px; font-variant-numeric: tabular-nums;
}

/* ---------- 入口磁贴 ---------- */
.tile {
  display: flex; flex-direction: column; gap: 10px; padding: 20px;
  border-radius: var(--radius-xl); cursor: pointer; text-align: left;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border); box-shadow: var(--shadow-glass);
  transition: transform 0.32s var(--spring-bounce), box-shadow 0.32s var(--spring), border-color 0.32s;
  min-height: 148px;
}
.tile:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--glass-border-hover); }
.tile-ico {
  width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: var(--glass-bg-sunken); color: var(--accent); margin-bottom: 2px;
}
.tile h3 { font-size: 15.5px; display: flex; align-items: center; gap: 8px; }
.tile p { font-size: 12.8px; color: var(--text-secondary); line-height: 1.6; }
.tile .tile-foot { margin-top: auto; display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--text-tertiary); }

/* ---------- 句子拆解组件（核心） ---------- */
.breaker {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  padding: 26px 26px 22px;
}
.breaker-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.breaker-head .bh-title { font-size: 13px; font-weight: 700; letter-spacing: 0.5px; color: var(--text-tertiary); text-transform: uppercase; }

.breaker-line {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo", sans-serif;
  font-size: clamp(24px, 3.6vw, 36px); font-weight: 600; letter-spacing: 1px;
  line-height: 1.5; display: flex; flex-wrap: wrap; align-items: flex-end;
  gap: 0; row-gap: 30px;
}
.seg {
  position: relative; padding: 2px 3px 10px; cursor: pointer;
  border-bottom: 3px solid transparent; border-radius: 3px 3px 0 0;
  transition: background 0.2s var(--spring), transform 0.2s var(--spring);
  border-bottom-color: var(--seg-color, transparent);
}
.seg:hover { background: var(--glass-bg-sunken); transform: translateY(-2px); }
.seg.active { background: var(--glass-bg-sunken); }
.seg[data-color="topic"] { --seg-color: var(--r-topic); }
.seg[data-color="subj"] { --seg-color: var(--r-subj); }
.seg[data-color="obj"] { --seg-color: var(--r-obj); }
.seg[data-color="pred"] { --seg-color: var(--r-pred); }
.seg[data-color="particle"] { --seg-color: var(--r-particle); }
.seg[data-color="mod"] { --seg-color: var(--r-mod); }
.seg[data-color="time"] { --seg-color: var(--r-time); }

.seg-role {
  position: absolute; left: 50%; transform: translateX(-50%); top: 100%;
  font-size: 10.5px; font-weight: 650; white-space: nowrap; letter-spacing: 0;
  color: var(--seg-color, var(--text-tertiary)); margin-top: 6px;
  font-family: inherit; opacity: 0.92;
}
.breaker-kana {
  font-size: 13.5px; color: var(--text-tertiary); letter-spacing: 1.6px;
  margin-top: 34px; font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
}
.breaker-zh {
  margin-top: 16px; padding-top: 16px; border-top: 1px dashed var(--glass-border);
  display: grid; gap: 8px;
}
.br-row { display: flex; gap: 12px; font-size: 14.5px; align-items: baseline; }
.br-row .k {
  flex-shrink: 0; width: 68px; font-size: 11.5px; font-weight: 650;
  color: var(--text-tertiary); letter-spacing: 0.3px; padding-top: 2px;
}
.br-row .v { color: var(--text-primary); }
.br-row .v.zh { color: var(--text-secondary); }
.br-row .v.note { color: var(--gold); font-size: 13.5px; }

.legend { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.legend span {
  font-size: 11px; font-weight: 600; padding: 3px 10px; border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--c) 14%, transparent); color: var(--c);
}

/* ---------- 例句块 ---------- */
.ex {
  padding: 15px 17px; border-radius: var(--radius-md);
  background: var(--glass-bg-sunken); border: 1px solid transparent;
  transition: all 0.25s var(--spring);
}
.ex + .ex { margin-top: 10px; }
.ex:hover { background: var(--glass-bg-hover); border-color: var(--glass-border); }
.ex-jp {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo", sans-serif;
  font-size: 19px; font-weight: 600; letter-spacing: 0.6px; line-height: 1.6;
}
.ex-kana { font-size: 12.5px; color: var(--text-tertiary); letter-spacing: 1.3px; margin-top: 3px; font-family: "Hiragino Sans", "Yu Gothic", sans-serif; }
.ex-zh { font-size: 14px; color: var(--text-secondary); margin-top: 7px; }
.ex-note {
  font-size: 13px; color: var(--gold); margin-top: 8px; padding-left: 11px;
  border-left: 2px solid var(--gold-soft); line-height: 1.6;
}
.ex-note.warn { color: var(--red); border-left-color: rgba(255, 59, 48, 0.3); }

/* 假名注音显隐 */
body.hide-kana .ex-kana,
body.hide-kana .line-kana,
body.hide-kana .breaker-kana,
body.hide-kana .bubble-kana,
body.hide-kana .kana-only { display: none !important; }
body.hide-kana .breaker-zh { margin-top: 30px; }

/* ---------- 列表条目 ---------- */
.rule {
  display: flex; gap: 14px; padding: 15px 0;
  border-bottom: 1px solid var(--glass-border);
}
.rule:last-child { border-bottom: none; }
.rule-n {
  flex-shrink: 0; width: 24px; height: 24px; border-radius: 8px;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
  background: var(--accent-dim); color: var(--accent);
}
.rule-b { flex: 1; min-width: 0; }
.rule-b strong { font-size: 14.5px; font-weight: 650; display: block; margin-bottom: 4px; }
.rule-b p { font-size: 13.5px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 表格 ---------- */
.tbl-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--glass-border); background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); }
table { width: 100%; border-collapse: collapse; font-size: 13.8px; }
th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--glass-border); vertical-align: top; }
th { font-size: 11.5px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase; color: var(--text-tertiary); background: var(--glass-bg-sunken); white-space: nowrap; }
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.2s; }
tbody tr:hover { background: var(--glass-bg-sunken); }
td .jp-cell { font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif; font-weight: 600; font-size: 16px; }

/* ---------- 五十音网格 ---------- */
.kana-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(126px, 1fr)); gap: 10px; }
.kana-cell {
  padding: 13px 12px; border-radius: var(--radius-md); cursor: pointer; text-align: left;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  transition: all 0.26s var(--spring); position: relative;
}
.kana-cell:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--glass-border-hover); background: var(--glass-bg-hover); }
.kana-cell .kc-top { display: flex; align-items: baseline; gap: 9px; }
.kana-cell .kc-char { font-size: 30px; font-weight: 600; line-height: 1.1; font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif; }
.kana-cell .kc-romaji { font-size: 12px; font-weight: 650; color: var(--accent); letter-spacing: 0.6px; }
.kana-cell .kc-src { font-size: 11.5px; color: var(--text-tertiary); margin-top: 6px; }
.kana-cell .kc-src b { color: var(--gold); font-size: 13px; font-weight: 700; }
.kana-cell .kc-tip { font-size: 11px; color: var(--text-secondary); margin-top: 5px; line-height: 1.5; }
.kana-filter { display: flex; gap: 6px; padding: 5px; background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border: 1px solid var(--glass-border); border-radius: 22px; width: fit-content; max-width: 100%; margin-bottom: 20px; flex-wrap: wrap; }
.chip { padding: 7px 18px; font-size: 13px; font-weight: 500; border-radius: var(--radius-full); color: var(--text-secondary); transition: all 0.2s var(--spring); white-space: nowrap; }
.chip:hover { color: var(--text-primary); }
.chip.active { background: var(--bg-elevated, #fff); color: var(--accent); font-weight: 650; box-shadow: var(--shadow-sm); }
html[data-theme="dark"] .chip.active { background: rgba(255, 255, 255, 0.12); color: #fff; }

/* ---------- 练习：每组题量选择 ---------- */
.qsize-row { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.qsize-label { font-size: 12.5px; font-weight: 550; color: var(--text-secondary); letter-spacing: 0.4px; margin-right: 3px; }
.size-chip {
  padding: 6px 15px; font-size: 12.5px; font-weight: 550; cursor: pointer;
  border-radius: var(--radius-full); color: var(--text-secondary);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.2s var(--spring); white-space: nowrap;
}
.size-chip:hover { color: var(--text-primary); transform: translateY(-1px); }
.size-chip.on {
  background: var(--bg-elevated, #fff); color: var(--accent); font-weight: 700;
  border-color: var(--accent); box-shadow: var(--shadow-sm);
}
html[data-theme="dark"] .size-chip.on { background: rgba(255, 255, 255, 0.14); color: #fff; border-color: rgba(255, 255, 255, 0.32); }
.card-gold { border-color: var(--gold-soft); box-shadow: 0 0 0 1px var(--gold-soft), var(--shadow-sm); }

/* ---------- 列表行（助词/句型选择） ---------- */
.list-row {
  display: flex; align-items: center; gap: 16px; padding: 17px 20px; cursor: pointer;
  border-radius: var(--radius-lg); background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border); box-shadow: var(--shadow-sm);
  transition: all 0.28s var(--spring);
}
.list-row:hover { transform: translateX(4px); box-shadow: var(--shadow-md); border-color: var(--glass-border-hover); }
.list-row .lr-key {
  flex-shrink: 0; min-width: 92px;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 21px; font-weight: 700; letter-spacing: 0.5px;
}
.list-row .lr-b { flex: 1; min-width: 0; }
.list-row .lr-b strong { font-size: 14.5px; font-weight: 650; display: block; }
.list-row .lr-b p { font-size: 12.8px; color: var(--text-secondary); margin-top: 3px; line-height: 1.55; }
.list-row .lr-arrow { flex-shrink: 0; color: var(--text-tertiary); transition: transform 0.25s var(--spring); }
.list-row:hover .lr-arrow { transform: translateX(3px); color: var(--accent); }

/* ---------- 返回条 ---------- */
.back-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; flex-wrap: wrap; }
.back-btn {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 16px;
  font-size: 13.5px; font-weight: 550; border-radius: var(--radius-full);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  color: var(--text-secondary); transition: all 0.22s var(--spring);
}
.back-btn:hover { color: var(--text-primary); transform: translateX(-3px); box-shadow: var(--shadow-sm); }

/* ---------- 场景会话 ---------- */
.dialogue { display: grid; gap: 14px; }
.bubble { display: flex; gap: 12px; align-items: flex-start; }
.bubble.me { flex-direction: row-reverse; }
.bubble-avatar {
  width: 36px; height: 36px; border-radius: var(--radius-full); flex-shrink: 0;
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700;
  background: var(--glass-bg-sunken); color: var(--text-secondary);
}
.bubble.me .bubble-avatar { background: var(--accent-dim); color: var(--accent); }
.bubble-body { max-width: min(560px, 78%); }
.bubble-jp {
  padding: 13px 17px; border-radius: 18px;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 16.5px; font-weight: 550; letter-spacing: 0.4px; line-height: 1.6;
}
.bubble.me .bubble-jp { background: linear-gradient(145deg, var(--accent), #1873d8); color: #fff; border-color: transparent; }
.bubble-zh { font-size: 12.8px; color: var(--text-tertiary); margin-top: 6px; padding: 0 4px; }
.bubble.me .bubble-zh { text-align: right; }
.bubble-kana { font-size: 11.5px; letter-spacing: 1.1px; color: var(--text-tertiary); margin-top: 3px; padding: 0 4px; font-family: "Hiragino Sans", "Yu Gothic", sans-serif; }
.bubble.me .bubble-kana { text-align: right; }
.bubble-tip {
  margin-top: 9px; font-size: 12.3px; line-height: 1.6; color: var(--gold);
  padding: 9px 13px; border-radius: var(--radius); background: var(--gold-soft);
}

/* ---------- 对比块 ---------- */
.vs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.vs-item { padding: 15px 17px; border-radius: var(--radius-md); border: 1px solid var(--glass-border); background: var(--glass-bg-sunken); }
.vs-item.good { border-color: rgba(52, 199, 89, 0.35); background: rgba(52, 199, 89, 0.07); }
.vs-item.bad { border-color: rgba(255, 59, 48, 0.3); background: rgba(255, 59, 48, 0.06); }
.vs-tag { font-size: 11px; font-weight: 700; letter-spacing: 0.5px; display: flex; align-items: center; gap: 6px; margin-bottom: 9px; }
.vs-item.good .vs-tag { color: #1f9d47; }
.vs-item.bad .vs-tag { color: var(--red); }
html[data-theme="dark"] .vs-item.good .vs-tag { color: #4ade80; }
.vs-item .jp { font-size: 17px; font-weight: 600; letter-spacing: 0.4px; }
.vs-item .zh { font-size: 13px; color: var(--text-secondary); margin-top: 6px; }
.vs-item .why { font-size: 12.3px; color: var(--text-tertiary); margin-top: 8px; line-height: 1.6; }

/* ---------- 提示框 ---------- */
.callout {
  padding: 16px 18px; border-radius: var(--radius-lg);
  background: var(--glass-bg-sunken); border-left: 3px solid var(--accent);
  font-size: 14px; line-height: 1.75; color: var(--text-secondary);
}
.callout strong { color: var(--text-primary); }
.callout.gold { border-left-color: var(--gold); }
.callout.red { border-left-color: var(--red); }
.callout.green { border-left-color: var(--green); }

/* ---------- 练习 ---------- */
.quiz-shell { max-width: 800px; margin: 0 auto; }
.quiz-progress { height: 6px; border-radius: var(--radius-full); background: var(--glass-bg-sunken); overflow: hidden; margin-bottom: 22px; }
.quiz-progress i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--purple)); transition: width 0.45s var(--ease-out); }
.quiz-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.quiz-q { font-size: clamp(19px, 2.6vw, 25px); font-weight: 700; letter-spacing: -0.4px; line-height: 1.55; }
.quiz-stem {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: clamp(21px, 3vw, 27px); font-weight: 600; letter-spacing: 1.5px; line-height: 1.8;
  padding: 18px 20px; border-radius: var(--radius-lg); background: var(--glass-bg-sunken);
  margin: 16px 0 20px;
}
.quiz-stem .blank { color: var(--accent); font-weight: 800; letter-spacing: 0; }
.opts { display: grid; gap: 10px; }
.opt {
  display: flex; align-items: center; gap: 14px; padding: 15px 18px; text-align: left;
  border-radius: var(--radius-md); border: 1px solid var(--glass-border);
  background: var(--glass-bg); transition: all 0.24s var(--spring);
  font-size: 15.5px; font-weight: 550;
}
.opt:hover:not(.locked) { border-color: var(--accent); transform: translateX(3px); box-shadow: var(--shadow-sm); }
.opt .opt-k {
  width: 26px; height: 26px; border-radius: 8px; flex-shrink: 0; display: grid; place-items: center;
  font-size: 12px; font-weight: 700; background: var(--glass-bg-sunken); color: var(--text-tertiary);
}
.opt .opt-jp { font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif; font-size: 17px; }
.opt.correct { border-color: rgba(52, 199, 89, 0.55); background: rgba(52, 199, 89, 0.1); }
.opt.correct .opt-k { background: #34c759; color: #fff; }
.opt.wrong { border-color: rgba(255, 59, 48, 0.5); background: rgba(255, 59, 48, 0.08); }
.opt.wrong .opt-k { background: var(--red); color: #fff; }
.opt.locked { cursor: default; }

.quiz-explain { margin-top: 18px; animation: viewIn 0.4s var(--ease-out); }
.quiz-verdict { display: flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 700; margin-bottom: 12px; }
.quiz-verdict.ok { color: #1f9d47; }
.quiz-verdict.no { color: var(--red); }
html[data-theme="dark"] .quiz-verdict.ok { color: #4ade80; }

.quiz-order { display: flex; flex-wrap: wrap; gap: 10px; margin: 16px 0; }
.word-chip {
  padding: 11px 16px; border-radius: var(--radius-md);
  border: 1px solid var(--glass-border); background: var(--glass-bg);
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 17px; font-weight: 600; transition: all 0.22s var(--spring-bounce);
}
.word-chip:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.word-chip.used { opacity: 0.28; pointer-events: none; }
/* 作答后词块已锁死，视觉上也要看得出来（和 .opt.locked 保持一致） */
.word-chip.locked { cursor: default; opacity: 0.6; }
.word-chip.locked.used { opacity: 0.28; }
.word-chip.locked:hover { transform: none; box-shadow: var(--shadow-sm); }
.answer-strip {
  min-height: 62px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  padding: 12px 14px; border-radius: var(--radius-lg);
  border: 1.5px dashed var(--glass-border); background: var(--glass-bg-sunken);
  margin-bottom: 16px;
}
.answer-strip .word-chip { animation: pop 0.28s var(--spring-bounce); }
@keyframes pop { from { transform: scale(0.7); opacity: 0; } to { transform: none; opacity: 1; } }

.quiz-result { text-align: center; padding: 46px 26px; }
.quiz-result .big { font-size: clamp(52px, 10vw, 80px); font-weight: 800; letter-spacing: -3px; color: var(--gold); line-height: 1; font-variant-numeric: tabular-nums; }
.quiz-result .sub { font-size: 16px; color: var(--text-secondary); margin-top: 14px; }

/* ---------- 学习路径 ---------- */
.stage { position: relative; padding-left: 44px; }
.stage::before {
  content: ''; position: absolute; left: 15px; top: 46px; bottom: -34px; width: 2px;
  background: linear-gradient(var(--glass-border-hover), transparent);
}
.stage:last-child::before { display: none; }
.stage-dot {
  position: absolute; left: 0; top: 6px; width: 32px; height: 32px; border-radius: var(--radius-full);
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  color: var(--text-secondary); box-shadow: var(--shadow-sm); z-index: 1;
}
.stage.done .stage-dot { background: linear-gradient(145deg, #34c759, #00c7be); color: #fff; border-color: transparent; }
.stage-card { padding: 20px 22px; margin-bottom: 34px; }
.stage-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.stage-head h3 { font-size: 18px; }
.stage-goal { font-size: 13.8px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.7; }
.checklist { display: grid; gap: 8px; }
.check {
  display: flex; gap: 12px; align-items: flex-start; padding: 11px 14px;
  border-radius: var(--radius); background: var(--glass-bg-sunken);
  cursor: pointer; transition: all 0.22s var(--spring); border: 1px solid transparent;
}
.check:hover { background: var(--glass-bg-hover); border-color: var(--glass-border); }
.check-box {
  width: 20px; height: 20px; border-radius: 6px; flex-shrink: 0; margin-top: 1px;
  border: 1.8px solid var(--glass-border-hover); display: grid; place-items: center;
  transition: all 0.22s var(--spring-bounce);
}
.check-box svg { opacity: 0; transition: opacity 0.2s; }
.check.done .check-box { background: var(--green); border-color: var(--green); }
.check.done .check-box svg { opacity: 1; }
.check-body { flex: 1; min-width: 0; }
.check-body strong { font-size: 14px; font-weight: 600; display: block; }
.check.done .check-body strong { color: var(--text-tertiary); text-decoration: line-through; text-decoration-color: var(--text-tertiary); }
.check-body p { font-size: 12.5px; color: var(--text-secondary); margin-top: 3px; line-height: 1.6; }

/* ---------- 进度环 ---------- */
.ring-wrap { display: flex; align-items: center; gap: 16px; }
.ring { transform: rotate(-90deg); }
.ring circle { fill: none; stroke-width: 7; stroke-linecap: round; }
.ring .bg { stroke: var(--glass-bg-sunken); }
.ring .fg { stroke: var(--gold); transition: stroke-dashoffset 0.7s var(--ease-out); }

/* ---------- 页脚 ---------- */
.site-footer { position: relative; z-index: 1; margin-top: 40px; padding: 34px 20px calc(38px + env(safe-area-inset-bottom)); }
.footer-inner { max-width: var(--maxw); margin: 0 auto; text-align: center; border-top: 1px solid var(--glass-border); padding-top: 26px; }
.footer-inner p { font-size: 13.5px; color: var(--text-secondary); }
.footer-inner .footer-sub { font-size: 12px; color: var(--text-tertiary); margin-top: 7px; }

/* ---------- 工具类 ---------- */
.mt-0 { margin-top: 0; } .mt-8 { margin-top: 8px; } .mt-14 { margin-top: 14px; }
.mt-20 { margin-top: 20px; } .mt-28 { margin-top: 28px; } .mt-40 { margin-top: 40px; }
.stack { display: grid; gap: 12px; }
.stack-sm { display: grid; gap: 8px; }
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.center { text-align: center; }
.hidden { display: none !important; }

/* ============================================================
   朗读按钮（Web Speech API，零依赖）
   ============================================================ */
.tts-on { position: relative; }
.tts-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 23px; height: 23px; margin-left: 9px; flex-shrink: 0;
  border-radius: 50%; vertical-align: middle; color: var(--accent);
  background: var(--accent-dim); opacity: 0.72;
  transition: transform 0.2s var(--spring-bounce), opacity 0.2s var(--spring), background 0.2s;
}
.tts-btn:hover { opacity: 1; background: var(--accent-glow); transform: scale(1.14); }
.tts-btn:active { transform: scale(0.9); }
.tts-btn svg { display: block; }

/* ============================================================
   今日一句
   ============================================================ */
.daily-card { padding: 24px 26px 22px; }
.daily-date {
  margin-left: auto; font-size: 12.5px; color: var(--text-tertiary);
  letter-spacing: 0.6px; font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.daily-zh {
  font-size: clamp(17px, 2.3vw, 21px); font-weight: 650;
  line-height: 1.62; letter-spacing: -0.2px;
}
.daily-answer { animation: fadeUp 0.35s var(--ease-out); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.daily-card .ex { margin-top: 0; }

/* ============================================================
   五十音 · 翻转记忆卡
   ============================================================ */
.flip-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 10px;
}
.flip {
  perspective: 900px; aspect-ratio: 1 / 1.06; cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.flip-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s var(--spring-bounce);
}
.flip.on .flip-inner { transform: rotateY(180deg); }
.flip-face {
  position: absolute; inset: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; padding: 8px 7px; text-align: center; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.25s var(--spring), box-shadow 0.25s var(--spring);
}
.flip:hover .flip-face { border-color: var(--glass-border-hover); box-shadow: var(--shadow-md); }
.flip-k {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Meiryo", sans-serif;
  font-size: 34px; font-weight: 600; line-height: 1.05; color: var(--text-primary);
}
.flip-r { font-size: 12px; color: var(--text-tertiary); letter-spacing: 0.4px; font-weight: 600; }
.flip-back { transform: rotateY(180deg); background: var(--glass-bg-strong); }
.flip-src {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 20px; font-weight: 700; color: var(--gold); line-height: 1.1;
}
.flip-tip { font-size: 10.5px; color: var(--text-secondary); line-height: 1.42; }

/* ============================================================
   五十音 · 听音辨字
   ============================================================ */
.listen-card { padding: 30px 22px 26px; }
.listen-hint { font-size: 14px; color: var(--text-secondary); margin-bottom: 18px; letter-spacing: -0.1px; }
.listen-opts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 24px; }
.listen-opt {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 14px 8px 12px; border-radius: var(--radius-md);
  border: 1px solid var(--glass-border); background: var(--glass-bg);
  transition: all 0.22s var(--spring-bounce);
}
.listen-opt:hover { transform: translateY(-3px); border-color: var(--glass-border-hover); box-shadow: var(--shadow-md); }
.listen-opt.correct {
  border-color: var(--green); background: rgba(52, 199, 89, 0.13);
  box-shadow: inset 0 0 0 1px var(--green);
}
.listen-opt.wrong { border-color: var(--red); background: rgba(255, 59, 48, 0.11); }
.lo-k {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 27px; font-weight: 600; line-height: 1.25;
}
.lo-r { font-size: 11.5px; color: var(--text-tertiary); letter-spacing: 1.3px; }
.listen-foot { display: flex; align-items: center; gap: 10px; margin-top: 24px; }

/* ============================================================
   场景 · 你来试一句
   ============================================================ */
.drill { display: grid; gap: 12px; }
.drill-item { padding: 18px 20px; transition: border-color 0.25s var(--spring); }
.drill-item.opened { border-color: var(--glass-border-hover); }
.drill-ctx {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 9px;
  padding-bottom: 13px; margin-bottom: 14px;
  border-bottom: 1px dashed var(--glass-border);
}
.drill-who {
  font-size: 11.5px; font-weight: 700; color: var(--accent);
  background: var(--accent-dim); padding: 2px 10px; border-radius: var(--radius-full);
  flex-shrink: 0;
}
.drill-ctx-jp {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 15.5px; font-weight: 600; letter-spacing: 0.3px;
}
.drill-ctx-zh { font-size: 12.5px; color: var(--text-tertiary); }
.drill-ask {
  display: flex; align-items: flex-start; gap: 11px;
  font-size: 15.5px; font-weight: 600; line-height: 1.6; letter-spacing: -0.1px;
}
.drill-n {
  flex-shrink: 0; width: 23px; height: 23px; margin-top: 2px;
  border-radius: 50%; background: var(--gold-soft); color: var(--gold);
  display: grid; place-items: center; font-size: 12px; font-weight: 800;
}
.drill-reveal { margin-top: 14px; }
.drill-ans {
  margin-top: 13px; padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--glass-bg-sunken);
  border-left: 3px solid var(--gold);
  animation: fadeUp 0.32s var(--ease-out);
}
.drill-a {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 19.5px; font-weight: 650; letter-spacing: 0.5px; line-height: 1.55;
}
.drill-kana {
  font-size: 12.5px; color: var(--text-tertiary); letter-spacing: 1.4px; margin-top: 4px;
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
}
.drill-tip {
  font-size: 13px; color: var(--text-secondary); line-height: 1.65;
  margin-top: 11px; padding-top: 10px; border-top: 1px solid var(--glass-border);
}
.drill-note {
  margin-top: 16px; font-size: 12.8px; color: var(--text-tertiary);
  padding-left: 12px; border-left: 2px solid var(--glass-border);
}

/* ============================================================
   练习 · 错题本
   ============================================================ */
.wrong-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
}
.wrong-figs { display: flex; gap: 28px; flex-wrap: wrap; }
.wrong-fig .n {
  font-size: 27px; font-weight: 800; letter-spacing: -1.8px;
  color: var(--gold); line-height: 1.1;
}
.wrong-fig .n.ok { color: var(--green); }
.wrong-fig .l { font-size: 12px; color: var(--text-secondary); margin-top: 3px; }
.wrong-item {
  padding: 13px 15px; border-radius: var(--radius);
  border: 1px solid var(--glass-border); background: var(--glass-bg-sunken);
}
.wrong-item.fixed { opacity: 0.66; }
.wrong-tags { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin-bottom: 8px; }
.wrong-n { font-size: 11.5px; color: var(--text-tertiary); }
.wrong-ok {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 11.5px; font-weight: 650; color: var(--green);
}
.wrong-q { font-size: 14px; font-weight: 600; line-height: 1.6; }
.wrong-a {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 15.5px; font-weight: 650; color: var(--gold); margin-top: 5px;
}
.btn:disabled { opacity: 0.42; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

/* ============================================================
   假名标注（小标）与「手动朗读按钮」
   —— 所有小标都用 .kana-only，跟着顶栏那盏「假名」开关一起藏。
   ============================================================ */
.say-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 23px; height: 23px; flex-shrink: 0; margin-left: 8px;
  border-radius: 50%; color: var(--accent); background: var(--accent-dim);
  opacity: 0.72; vertical-align: middle;
  transition: transform 0.2s var(--spring-bounce), opacity 0.2s var(--spring), background 0.2s;
}
.say-btn:hover { opacity: 1; background: var(--accent-glow); transform: scale(1.14); }
.say-btn:active { transform: scale(0.9); }
.say-btn svg { display: block; }
.say-inline { letter-spacing: 0; }

/* 通用小字假名行 */
.quiz-kana, .vs-kana, .drill-ctx-kana, .wc-kana, .opt-kana {
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  color: var(--text-tertiary); font-weight: 500;
}
.quiz-kana { font-size: 14px; letter-spacing: 2px; margin: -8px 0 20px; line-height: 1.6; }
.quiz-kana .blank { letter-spacing: 0; }

/* 对比块里的假名（紧贴在「中式说法 / 地道说法」下面） */
.vs-kana { font-size: 12.5px; letter-spacing: 1.3px; margin-top: 4px; line-height: 1.55; }

/* 场景「你来试一句」里对方那句的假名 */
.drill-ctx-kana { font-size: 12px; letter-spacing: 1.2px; }

/* ---------- 练习 · 完整句朗读块 ---------- */
.quiz-say { margin-top: 18px; }
.quiz-say-h {
  display: flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 650; color: var(--gold); margin-bottom: 9px;
}
.quiz-say .ex { padding: 14px 16px; }

/* ---------- 语序题的词块（词 + 小字假名） ---------- */
.word-chip { display: inline-flex; }
.wc-in { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.wc-t { line-height: 1.25; }
.wc-kana { font-size: 10.5px; letter-spacing: 0.6px; line-height: 1.2; opacity: 0.9; }
.answer-strip .word-chip { padding-top: 9px; padding-bottom: 9px; }

/* ---------- 选择题：选项做成可含朗读按钮的块 ---------- */
.opt { width: 100%; box-sizing: border-box; cursor: pointer; }
.opt:not(button) { font: inherit; }      /* div 版选项要显式继承字体，按钮版不用 */
.opt .opt-jp { display: block; font-weight: 550; }
.opt-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.opt-kana { font-size: 12.5px; letter-spacing: 1.1px; font-weight: 500; }
.opt .say-btn { margin-left: auto; }

/* 汉字 · 字形差异里的「中文那一侧」（不给它挂读音） */
.kc-cn {
  font-family: "PingFang SC", "Hiragino Sans", "Microsoft YaHei", sans-serif;
  font-weight: 700;
}

/* ============================================================
   自动词 / 他动词 · 视角翻转卡
   ============================================================ */
.tv-hint {
  display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; color: var(--text-secondary);
  padding: 11px 14px; border-radius: var(--radius);
  background: var(--glass-bg-sunken);
}
.tv-hint svg { color: var(--accent); flex-shrink: 0; }

/* 五条规律：卡片内容偏长，给宽一点，别挤成窄条 */
.trans-rules { grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); }
.trans-no {
  display: inline-block; margin-right: 8px;
  font-size: 12px; font-weight: 800; letter-spacing: 0.5px;
  color: var(--accent); font-variant-numeric: tabular-nums;
}

.tv-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(278px, 1fr)); gap: 14px; }

.tv-card {
  position: relative; cursor: pointer; overflow: hidden;
  padding: 18px 18px 42px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.28s var(--spring), box-shadow 0.28s var(--spring), border-color 0.28s var(--spring);
}
.tv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--glass-border-hover); }
.tv-card:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.tv-card.on { border-color: var(--glass-border-hover); }

.tv-face { animation: tvIn 0.34s var(--ease-out); }
.tv-card .tv-t { display: none; }
.tv-card.on .tv-a { display: none; }
.tv-card.on .tv-t { display: block; }
@keyframes tvIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.tv-badge {
  display: inline-flex; align-items: center;
  font-size: 11px; font-weight: 700; letter-spacing: 0.3px;
  padding: 3px 9px; border-radius: var(--radius-full); margin-bottom: 11px;
}
.tv-badge.auto { background: var(--accent-dim); color: var(--accent); }
.tv-badge.tran { background: rgba(175, 82, 222, 0.14); color: var(--purple); }

.tv-jp { font-size: 21px; font-weight: 650; letter-spacing: 0.6px; line-height: 1.5; color: var(--text-primary); }
.tv-p { color: var(--accent); font-weight: 800; }
.tv-card.on .tv-p { color: var(--purple); }
.tv-v { color: var(--text-primary); }

.tv-kana { font-size: 12.5px; color: var(--text-tertiary); letter-spacing: 1.2px; margin-top: 3px; }
.tv-zh { font-size: 13.5px; color: var(--text-secondary); margin-top: 8px; }

.tv-tip {
  margin-top: 13px; padding-top: 11px;
  border-top: 1px dashed var(--glass-border);
  font-size: 12.5px; line-height: 1.62; color: var(--text-secondary);
}

.tv-swap {
  position: absolute; right: 14px; bottom: 12px;
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 650; color: var(--text-tertiary);
  transition: color 0.25s var(--spring);
}
.tv-card:hover .tv-swap { color: var(--accent); }

.tv-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tv-tag {
  font-size: 13px; font-weight: 600; padding: 5px 11px;
  border-radius: var(--radius); background: var(--glass-bg-sunken);
  border: 1px solid var(--glass-border); color: var(--text-primary);
}

/* ============================================================
   新增知识模块：变形 / 授受 / 敬语 / 条件 / 数量 / 拟声 / 接续
   ============================================================ */

/* ---------- 导航：分组入口 + 二级菜单 ----------
   顶栏只留「首页 / 基础 / 语法 / 表达 / 实战 / 练习」六个入口，
   其余页面收进二级菜单。菜单必须是 .navbar 的直接子元素 ——
   放进 .nav-scroll 会被它的横向滚动（overflow-x:auto）整块裁掉。 */
.nav-parent {
  display: inline-flex; align-items: center; gap: 5px;
  border: 0; background: none; color: inherit;
  /* 只继承字体族：写成 font: inherit 会把 .nav-chip 的 13.5px 覆盖成继承字号，
     结果「基础/语法/表达/实战」比「首页/练习」大了一号。 */
  font-family: inherit;
  cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.nav-caret {
  width: 11px; height: 11px; flex-shrink: 0; opacity: 0.5;
  transition: transform 0.24s var(--spring), opacity 0.2s;
}
.nav-parent:hover .nav-caret { opacity: 0.85; }
.nav-parent.open .nav-caret { opacity: 0.95; transform: rotate(180deg); }

.nav-menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  z-index: 130; min-width: 246px; padding: 7px;
  display: flex; flex-direction: column; gap: 1px;
  /* 这里刻意不用 --glass-bg-strong + backdrop-filter：菜单底下压着正文，
     毛玻璃在部分环境（无头截图、老内核）不生效时，正文会直接透上来糊成一片。 */
  background: var(--menu-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  opacity: 0; visibility: hidden; pointer-events: none;
  transform: translateY(-7px) scale(0.975); transform-origin: top center;
  transition: opacity 0.17s ease, transform 0.26s var(--spring), visibility 0.17s;
}
.nav-menu.open { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }

.nav-item {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; gap: 1px;
  padding: 8px 11px; border-radius: 10px;
  transition: color 0.18s var(--spring);
}
.nav-item b { font-size: 13.5px; font-weight: 600; letter-spacing: -0.2px; color: var(--text-primary); }
.nav-item i { font-style: normal; font-size: 11px; line-height: 1.35; color: var(--text-tertiary); }
.nav-item.active { background: none; }
.nav-item.active b { color: #fff; }
.nav-item.active i { color: rgba(255, 255, 255, 0.8); }

/* ---------- Liquid Gooey：液态指示器 ----------
   做法参考 libraries.dev 的 liquid-gooey —— 把纯色块放进一个带 goo 滤镜的层里，
   高斯模糊把边缘糊开，再用 alpha 对比度把 >0.44 的部分拉回实心，
   于是靠得近的两块会自动「黏」成一体（液桥），离远了又各自收成圆角块。
   文字放在滤镜层外面，所以永远是清晰的。

   每处指示器都是「主块 + 拖尾」打同一个坐标，但拖尾慢半拍：
   切换时主块先到位、拖尾还在半路，两块被拉成一条液柱再收拢 —— 这就是"液感"。
   缓动用 --spring-bounce，和官方 playground 的 cubic-bezier(.34,1.56,.64,1) 一致。 */
.liquid-layer {
  position: absolute; inset: 0; z-index: 0;
  pointer-events: none;
  --liq-fill: var(--accent);
  --liq-hover: var(--goo-hover);
  filter: url(#jlGoo);
}
/* 柔和版（底部导航）：胶囊用沉底色而不是强调色 */
.liquid-layer.is-soft { --liq-fill: var(--goo-hover); }
.liquid-layer.is-off { opacity: 0; }
.liquid-blob {
  position: absolute; left: 0; top: 0; width: 0; height: 0;
  transition: transform 0.46s var(--spring-bounce), width 0.46s var(--spring-bounce), height 0.46s var(--spring-bounce);
  will-change: transform, width;
}
.liquid-blob > b {
  display: block; width: 100%; height: 100%;
  border-radius: var(--radius-full); background: var(--liq-fill);
}
/* 拖尾慢半拍：主块到位后它才追上来，中途两块融成液柱 */
.liquid-blob.lb-tail { transition-duration: 0.72s; }
/* 悬停块：从光标所在位置「长」出来，贴着主块时直接融进去 */
.liquid-blob.lb-hover > b {
  background: var(--liq-hover);
  opacity: 0; transform: scale(0.5);
  transition: opacity 0.2s ease, transform 0.34s var(--spring-bounce);
}
.liquid-blob.lb-hover.on > b { opacity: 1; transform: none; }
/* 首次定位不带动画，否则整块会从左上角飞进来 */
.liquid-layer.is-boot .liquid-blob,
.liquid-layer.is-boot .liquid-blob > b { transition: none !important; }

.goo-defs { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---------- 通用表格（新模块共用） ---------- */
.table-scroll {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg); border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-sm);
}
.table-scroll::-webkit-scrollbar { height: 6px; }
.table-scroll::-webkit-scrollbar-thumb { background: var(--glass-border-hover); border-radius: 3px; }
.ct-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.ct-table th, .ct-table td {
  padding: 12px 14px; text-align: left; vertical-align: top;
  border-bottom: 1px solid var(--glass-border); white-space: nowrap;
}
.ct-table thead th {
  font-size: 11.5px; font-weight: 700; color: var(--text-secondary);
  background: var(--glass-bg-sunken); letter-spacing: 0.2px;
}
.ct-table tbody tr:last-child td { border-bottom: none; }
.ct-table td { color: var(--text-secondary); }
.ct-table td .jp { color: var(--text-primary); font-weight: 650; }
.ct-table th b, .ct-table th span { display: block; }
.ct-table th b { font-size: 15px; color: var(--text-primary); }
.ct-table th span { font-size: 10.5px; color: var(--text-tertiary); font-weight: 400; margin-top: 2px; }
.ct-table td > span { display: block; font-size: 11px; color: var(--text-tertiary); font-weight: 400; margin-top: 2px; }
.ct-stick { position: sticky; left: 0; z-index: 1; background: var(--glass-bg-strong); }
.ct-table thead .ct-stick { z-index: 2; }

/* ---------- 变形 ---------- */
.cj-exline {
  margin-top: 11px; padding-left: 10px; border-left: 2px solid var(--accent-dim);
  font-size: 12.5px; line-height: 1.7; color: var(--text-secondary);
}
.cj-trap {
  margin-top: 11px; padding: 10px 12px; border-radius: var(--radius);
  background: var(--gold-soft); color: var(--gold);
  font-size: 12.5px; line-height: 1.7;
}
.cj-tags { display: flex; flex-wrap: wrap; gap: 7px; }
.cj-tag {
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 5px 11px; border-radius: var(--radius-full); background: var(--glass-bg-sunken);
}
.cj-tag b { font-size: 14px; color: var(--text-primary); }
.cj-tag i { font-size: 11px; font-style: normal; color: var(--accent); }
.cj-tag em { font-size: 11px; font-style: normal; color: var(--text-tertiary); }
.cj-form h3 { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.cj-sub { font-size: 11.5px; font-weight: 500; color: var(--text-tertiary); }
.cj-form p { font-size: 13.5px; line-height: 1.78; color: var(--text-primary); }
.cj-tip {
  display: flex; gap: 7px; margin-top: 11px; padding: 10px 12px;
  border-radius: var(--radius); background: var(--accent-dim);
  font-size: 12.5px; line-height: 1.68; color: var(--text-secondary);
}
.cj-tip svg { color: var(--accent); flex-shrink: 0; margin-top: 3px; }

.adj-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 9px; }
.adj-cell {
  display: flex; flex-direction: column; gap: 3px;
  padding: 10px 12px; border-radius: var(--radius); background: var(--glass-bg-sunken);
}
.adj-cell .k { font-size: 11px; color: var(--text-tertiary); }
.adj-cell b { font-size: 15.5px; color: var(--text-primary); }
.adj-cell em { font-size: 11.5px; font-style: normal; color: var(--text-secondary); }
.adj-cell i { font-size: 11px; font-style: normal; color: var(--text-tertiary); line-height: 1.55; }

.cj-drill { border-radius: var(--radius-lg); background: var(--glass-bg-sunken); padding: 16px; }
.cj-drill-name { display: flex; align-items: baseline; gap: 9px; margin-bottom: 13px; }
.cj-drill-name span { font-size: 21px; font-weight: 700; color: var(--text-primary); letter-spacing: 0.5px; }
.cj-drill-name em {
  font-size: 11.5px; font-style: normal; font-weight: 650;
  padding: 2px 10px; border-radius: var(--radius-full);
  background: var(--accent-dim); color: var(--accent);
}
.cj-drill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(142px, 1fr)); gap: 8px; }
.cj-drill-cell {
  display: flex; flex-direction: column; gap: 4px;
  padding: 10px 12px; border-radius: var(--radius);
  background: var(--glass-bg); border: 1px solid var(--glass-border);
}
.cj-drill-cell span { font-size: 11px; color: var(--text-tertiary); }
.cj-drill-cell b { font-size: 15px; font-weight: 650; color: var(--text-primary); }

/* ---------- 授受 ---------- */
.gv-card { position: relative; overflow: hidden; }
.gv-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; }
.gv-card.a::before { background: var(--accent); }
.gv-card.k::before { background: var(--green); }
.gv-card.m::before { background: var(--purple); }
.gv-arrow { font-size: 12px; font-weight: 700; letter-spacing: 0.4px; margin-bottom: 9px; }
.gv-card.a .gv-arrow { color: var(--accent); }
.gv-card.k .gv-arrow { color: var(--green); }
.gv-card.m .gv-arrow { color: var(--purple); }
.gv-card h3 { display: flex; align-items: baseline; gap: 8px; font-size: 19px; }
.gv-kanji { font-size: 11.5px; font-weight: 400; color: var(--text-tertiary); }
.gv-note {
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--glass-border);
  font-size: 12.5px; line-height: 1.72; color: var(--text-secondary);
}
.gv-mean { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-top: 7px; }
.gv-scene { font-size: 13px; font-weight: 650; color: var(--accent); letter-spacing: 0.2px; }

/* ---------- 敬语 ---------- */
.kg-kana { font-size: 11.5px; font-weight: 400; color: var(--text-tertiary); margin-left: 7px; }
.kg-row {
  display: flex; gap: 9px; align-items: baseline;
  margin-top: 9px; font-size: 12.5px; line-height: 1.72; color: var(--text-secondary);
}
.kg-row b {
  flex-shrink: 0; font-size: 11px; font-weight: 650; color: var(--text-tertiary);
  padding: 2px 8px; border-radius: var(--radius-full); background: var(--glass-bg-sunken);
}
.kg-row span.jp { color: var(--text-primary); font-weight: 600; }
.kg-note {
  margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--glass-border);
  font-size: 12.5px; line-height: 1.72; color: var(--text-secondary);
}
.kg-card.teinei { border-top: 3px solid var(--accent); }
.kg-card.sonkei { border-top: 3px solid var(--green); }
.kg-card.kenjo { border-top: 3px solid var(--purple); }
.kg-build h3 { margin-bottom: 13px; }
.kg-build.sonkei { border-top: 3px solid var(--green); }
.kg-build.kenjo { border-top: 3px solid var(--purple); }
.kg-f {
  display: flex; flex-direction: column; gap: 4px; margin-bottom: 9px;
  padding: 11px 13px; border-radius: var(--radius); background: var(--glass-bg-sunken);
}
.kg-f .t { font-size: 11px; color: var(--text-tertiary); }
.kg-f b { font-size: 15px; font-weight: 650; color: var(--text-primary); }
.kg-f i { font-size: 12px; font-style: normal; color: var(--accent); }

/* ---------- 条件 ---------- */
.cd-card { position: relative; }
.cd-card.to { border-left: 3px solid var(--accent); }
.cd-card.ba { border-left: 3px solid var(--teal); }
.cd-card.tara { border-left: 3px solid var(--gold); }
.cd-card.nara { border-left: 3px solid var(--purple); }
.cd-mark {
  position: absolute; top: 17px; right: 20px;
  font-size: 22px; font-weight: 700; letter-spacing: 1px;
  color: var(--text-tertiary); opacity: 0.55;
}
.cd-how { display: flex; gap: 9px; align-items: baseline; margin-top: 12px; font-size: 12.5px; }
.cd-how b {
  flex-shrink: 0; font-size: 11px; font-weight: 650; color: var(--text-tertiary);
  padding: 2px 8px; border-radius: var(--radius-full); background: var(--glass-bg-sunken);
}
.cd-how span { color: var(--text-primary); font-weight: 600; }
.cd-card p { font-size: 13.5px; color: var(--text-primary); }
.cd-limit {
  margin-top: 11px; padding: 10px 12px; border-radius: var(--radius);
  background: var(--glass-bg-sunken); font-size: 12.5px; line-height: 1.72; color: var(--text-secondary);
}
.cd-mk { display: inline-block; width: 19px; font-size: 13px; font-weight: 700; }
.cd-mk.ok { color: var(--green); }
.cd-mk.mid { color: var(--orange); }
.cd-mk.no { color: var(--red); }
.ct-table td em {
  display: block; margin-top: 3px; font-style: normal;
  font-size: 12px; color: var(--text-tertiary); white-space: normal;
}

/* ---------- 数量词 ---------- */
.ct-card h3 { letter-spacing: 0.5px; }
.ct-kana { font-size: 12px; color: var(--text-tertiary); }
.ct-items {
  margin-top: 12px; padding: 11px 13px; border-radius: var(--radius);
  background: var(--glass-bg-sunken); font-size: 12.5px; line-height: 2; color: var(--text-primary);
}
.ct-items b { color: var(--accent); font-weight: 700; }
.ct-note { margin-top: 11px; font-size: 12px; line-height: 1.7; color: var(--text-secondary); }

/* ---------- 拟声拟态 ---------- */
.mm-w { font-size: 19px; font-weight: 700; letter-spacing: 0.8px; color: var(--text-primary); }
.mm-k { font-size: 11.5px; color: var(--text-tertiary); margin-left: 8px; }
.mm-zh {
  max-width: 48%; text-align: right; line-height: 1.5;
  font-size: 12px; font-weight: 600; color: var(--accent);
}

/* ---------- 接续词 ---------- */
.lk-w { font-size: 17px; font-weight: 700; color: var(--text-primary); }
.lk-k { font-size: 11.5px; color: var(--text-tertiary); margin-left: 8px; }
.lk-tag {
  flex-shrink: 0; font-size: 10.5px; font-weight: 650; white-space: nowrap;
  padding: 3px 9px; border-radius: var(--radius-full);
  background: var(--glass-bg-sunken); color: var(--text-secondary);
}
.lk-zh { margin-top: 8px; font-size: 13px; font-weight: 600; color: var(--accent); }
.lk-tip {
  margin-top: 11px; padding-top: 11px; border-top: 1px solid var(--glass-border);
  font-size: 12px; line-height: 1.68; color: var(--text-secondary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .g-4 { grid-template-columns: repeat(2, 1fr); }
  .g-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .navbar { top: 10px; width: calc(100% - 20px); padding: 8px 12px; gap: 10px; border-radius: var(--radius-lg); }
  .brand-text { display: none; }
  .view { padding: calc(var(--nav-h) + 26px) 16px 50px; }
  .vs { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  /* 窄屏二级菜单整宽铺开，对齐导航条外沿（抵消 .navbar 的 12px 内边距 + 1px 边框） */
  .nav-menu { left: -13px; right: -13px; min-width: 0; max-height: 62vh; overflow-y: auto; }
  /* 窄屏顶栏只留分组入口：首页/练习 交给底部导航，省下的宽度刚好不再横向溢出 */
  .nav-scroll > .nav-chip:not(.nav-parent) { display: none; }
  /* 首页/练习 藏了，两条分组竖线就成了浮在两端的光杆，一并收起 */
  .nav-div { display: none; }
  .nav-scroll { padding-left: 0; }
  .nav-item { padding: 9px 12px; }
  .nav-item b { font-size: 14px; }
  .hero-stats { gap: 24px; }
  .breaker { padding: 20px 18px 18px; }
  .kana-grid { grid-template-columns: repeat(auto-fill, minmax(104px, 1fr)); }
  .list-row .lr-key { min-width: 74px; font-size: 18px; }
  .bubble-body { max-width: 84%; }
  .quiz-stem { letter-spacing: 0.8px; }
  .flip-grid { grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); }
  .flip-k { font-size: 29px; }
  .flip-tip { font-size: 9.8px; }
  .listen-opts { grid-template-columns: repeat(2, 1fr); }
  .wrong-figs { gap: 18px; }
  .wrong-head { align-items: flex-start; }
  .daily-card { padding: 20px 18px 18px; }
  .quiz-kana { font-size: 13px; letter-spacing: 1.4px; }
  .opt { gap: 11px; padding: 13px 14px; }
  .wc-kana { font-size: 10px; }
  .tv-grid { grid-template-columns: 1fr; }
  .tv-jp { font-size: 19.5px; }
  .ct-table { font-size: 12.5px; }
  .ct-table th, .ct-table td { padding: 9px 11px; }
  .cj-drill-grid, .adj-grid { grid-template-columns: repeat(2, 1fr); }
  .mm-zh { max-width: 52%; font-size: 11.5px; }
  .cd-mark { font-size: 18px; top: 15px; right: 16px; }
  .gv-card h3, .mm-w { font-size: 18px; }
  .ct-items { font-size: 12px; line-height: 1.95; }
}
@media (max-width: 480px) {
  /* 430 这条线要放下四个分组入口，chip 得再收一圈 */
  .nav-chip { padding: 7px 9px; font-size: 12.5px; }
  .nav-parent { gap: 3px; }
  .nav-caret { width: 9px; height: 9px; }
  .hero-title { letter-spacing: -1.4px; }
  .hero-actions .btn { flex: 1; }
  .card, .tile { padding: 17px; }
  .breaker-line { letter-spacing: 0.4px; }
  .breaker-kana { margin-top: 30px; }
  .seg-role { font-size: 9.5px; }
}
@media (max-width: 360px) {
  .kana-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stat .n { font-size: 28px; }
}

/* 触控设备禁用 hover */
@media (hover: none) and (pointer: coarse) {
  .card.hoverable:hover, .tile:hover, .list-row:hover, .kana-cell:hover,
  .btn-ghost:hover, .opt:hover:not(.locked) { transform: none; }
  .card.hoverable:active, .tile:active { transform: scale(0.98); }
  .list-row:active, .kana-cell:active { transform: scale(0.99); }
  .tv-card:hover { transform: none; }
  .tv-card:active { transform: scale(0.985); }
}

/* ---------- 开口急救包 ---------- */
.phrase-card { transition: transform 0.28s var(--spring), box-shadow 0.28s var(--spring); }
.phrase-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.phrase-jp {
  font-size: clamp(20px, 3.2vw, 28px); font-weight: 700; letter-spacing: 0.6px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.phrase-kana {
  font-size: 13.5px; color: var(--text-tertiary); letter-spacing: 1.2px; margin-top: 4px;
}
.phrase-zh {
  font-size: 15px; color: var(--text-primary); font-weight: 600; margin-top: 10px; line-height: 1.6;
}

/* ---------- 3D 卡片倾斜（仅桌面 hover） ---------- */
@media (hover: hover) and (pointer: fine) {
  .card.hoverable, .tile {
    transform-style: preserve-3d;
    perspective: 800px;
  }
  .card.hoverable:hover { transform: translateY(-4px) rotateX(1.5deg) rotateY(-1deg); }
  .tile:hover { transform: translateY(-5px) rotateX(1.5deg) rotateY(-1deg); }
}

/* ---------- 答题动效 ---------- */
@keyframes pulseGreen {
  0% { box-shadow: 0 0 0 0 rgba(52,199,89,0.5); }
  70% { box-shadow: 0 0 0 12px rgba(52,199,89,0); }
  100% { box-shadow: 0 0 0 0 rgba(52,199,89,0); }
}
@keyframes shakeRed {
  0%,100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}
.opt.correct {
  border-color: var(--green) !important;
  background: rgba(52,199,89,0.08) !important;
  animation: pulseGreen 0.6s ease-out;
}
.opt.wrong {
  border-color: var(--red) !important;
  background: rgba(255,59,48,0.06) !important;
  animation: shakeRed 0.45s ease-in-out;
}

/* ---------- 底部手机导航 ---------- */
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 101;
  background: var(--glass-bg-strong);
  backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom));
}
.bottom-nav-inner {
  position: relative;
  display: flex; justify-content: space-around; align-items: center; max-width: var(--maxw); margin: 0 auto;
}
.bottom-nav a {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 4px 8px; border-radius: 14px; color: var(--text-tertiary);
  font-size: 10px; font-weight: 500; transition: color 0.2s;
  min-width: 56px;
}
.bottom-nav a svg { width: 22px; height: 22px; stroke-width: 1.7; }
.bottom-nav a.active { color: var(--accent); }
.bottom-nav a:active { transform: scale(0.92); }

@media (max-width: 720px) {
  .bottom-nav { display: block; }
  .view { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .site-footer { padding-bottom: calc(24px + env(safe-area-inset-bottom)); }
}

/* ---------- 安全区适配 ---------- */
@supports (padding: max(0px)) {
  .navbar { top: max(10px, env(safe-area-inset-top)); }
  .view { padding-top: calc(var(--nav-h) + max(26px, env(safe-area-inset-top)) + 10px); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}