/* ============================================================
   Mein Deutschheft · 视觉系统
   编辑手账风：暖纸底 + 衬线标题 + 德语词性三色
   ============================================================ */

:root {
  --paper: #F6F1E7;
  --paper-2: #FDFAF3;
  --paper-3: #EFE8D8;
  --ink: #201B14;
  --ink-2: #4A4234;
  --ink-3: #8A7D66;
  --line: #DED3BC;
  --line-soft: #EAE1CD;
  --accent: #B4551D;        /* 焦橙 —— 主强调 */
  --accent-soft: #F3E3D5;
  --gold: #C9A227;          /* 德金 */
  --c-der: #2456A6;         /* 阳性 蓝 */
  --c-die: #B03048;         /* 阴性 红 */
  --c-das: #2E7D5B;         /* 中性 绿 */
  --c-verb: #6B4FA1;
  --c-adj: #B4551D;
  --ok: #2E7D5B;
  --bad: #B03048;
  --font-display: "Fraunces", "Songti SC", "STSong", serif;
  --font-body: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", monospace;
  --sidebar-w: 264px;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(32,27,20,.05), 0 8px 28px rgba(32,27,20,.07);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* 纸张噪点肌理 */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  opacity: .35;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.05'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: rgba(180,85,29,.22); }

/* ---------------- 布局骨架：顶部导航（参考 jianwu-atlas-private） ---------------- */

.topnav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: 64px;
  background: rgba(253,250,243,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { max-width: 1280px; margin: 0 auto; height: 100%; display: flex; align-items: center; gap: 20px; padding: 0 24px; }
.nav-brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px; flex-shrink: 0;
  background: url("../img/favicon.svg?v=32") center/100% 100% no-repeat;
  color: transparent; overflow: hidden;
}
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.05; }
.nav-brand-title { font-family: var(--font-display); font-weight: 700; font-size: 16.5px; letter-spacing: .02em; }
.nav-brand-sub { font-size: 10.5px; color: var(--ink-3); letter-spacing: .12em; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-left: auto; flex-wrap: nowrap; }
.nav-links a {
  padding: 8px 13px; border-radius: 8px;
  font-size: 14px; font-weight: 500; text-decoration: none; color: var(--ink-2);
  transition: background .18s, color .18s; white-space: nowrap;
}
.nav-links a:hover { background: var(--paper-3); color: var(--ink); }
.nav-links a.active { background: var(--ink); color: var(--paper-2); }
.nav-tools { display: flex; align-items: center; gap: 6px; }
.nav-tools button {
  width: 36px; height: 36px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--paper-2);
  font-size: 15px; cursor: pointer; color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center;
  transition: background .18s;
}
.nav-tools button:hover { background: var(--paper-3); }
.nav-tools .nav-burger { display: none; }

.page-wrap { max-width: 1180px; margin: 0 auto; padding: 104px 24px 60px; position: relative; z-index: 1; }

.brand { margin-bottom: 34px; }
.brand-de {
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.15;
}
.brand-de em { color: var(--accent); font-style: italic; }
.brand-zh { font-size: 12.5px; color: var(--ink-3); margin-top: 6px; letter-spacing: .14em; }

.nav { display: flex; flex-direction: column; gap: 2px; }
.nav-item {
  display: flex; align-items: baseline; gap: 10px;
  padding: 9px 12px;
  border-radius: 9px;
  color: var(--ink-2);
  text-decoration: none;
  font-size: 14.5px;
  transition: background .18s, color .18s;
  border-left: 2px solid transparent;
}
.nav-item .nav-de { font-weight: 600; }
.nav-item .nav-zh { font-size: 12px; color: var(--ink-3); margin-left: auto; }
.nav-item:hover { background: var(--paper-3); }
.nav-item.active {
  background: var(--ink);
  color: var(--paper-2);
  border-left-color: var(--accent);
}
.nav-item.active .nav-zh { color: rgba(253,250,243,.6); }

.page-wrap { max-width: 1180px; margin: 0 auto; padding: 104px 24px 60px; position: relative; z-index: 1; }

/* ---------------- 页脚（参考 jianwu-atlas-private） ---------------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 24px 30px;
  margin-top: 70px;
  position: relative; z-index: 1;
}
.footer-inner { max-width: 1180px; margin: 0 auto; }
.footer-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: center; margin-bottom: 16px; }
.footer-chip {
  font-family: var(--font-mono); font-size: 11.5px;
  padding: 5px 12px; border-radius: 99px;
  border: 1px solid var(--line); color: var(--ink-2);
  text-decoration: none; transition: all .18s;
}
.footer-chip:hover { border-color: var(--accent); color: var(--accent); }
.footer-copyright { text-align: center; font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); }
.footer-copyright a { color: var(--accent); text-decoration: none; }

/* ---------------- 通用组件 ---------------- */
.page-head { margin-bottom: 36px; }
.page-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 42px;
  font-weight: 650;
  letter-spacing: -.015em;
  line-height: 1.1;
}
.page-title em { color: var(--accent); font-style: italic; }
.page-desc { margin-top: 12px; color: var(--ink-2); max-width: 640px; font-size: 15px; }

.card {
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 2.5px 9px;
  border-radius: 99px;
  border: 1px solid var(--line);
  color: var(--ink-2);
  background: var(--paper);
}
.tag-a1 { background: #EDF2FB; border-color: #C7D6F0; color: var(--c-der); }
.tag-a2 { background: var(--accent-soft); border-color: #E4C4AC; color: var(--accent); }

.gd-der { color: var(--c-der); font-weight: 700; }
.gd-die { color: var(--c-die); font-weight: 700; }
.gd-das { color: var(--c-das); font-weight: 700; }

/* ---------------- 首页 ---------------- */
.hero {
  position: relative;
  border-radius: 20px;
  padding: 58px 52px 48px;
  background:
    radial-gradient(120% 160% at 88% -10%, rgba(201,162,39,.16), transparent 55%),
    radial-gradient(100% 140% at -8% 110%, rgba(180,85,29,.12), transparent 50%),
    var(--ink);
  color: #F3EDE0;
  overflow: hidden;
  margin-bottom: 30px;
}
.hero::after {
  content: "Aa Öö Üü ß";
  position: absolute;
  right: 26px; bottom: -30px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 118px;
  font-weight: 300;
  color: rgba(243,237,224,.07);
  white-space: nowrap;
  pointer-events: none;
}
.hero-kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .26em; color: var(--gold); text-transform: uppercase; }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(38px, 5vw, 58px);
  font-weight: 640;
  letter-spacing: -.02em;
  line-height: 1.05;
  margin: 14px 0 16px;
}
.hero h1 em { color: var(--gold); font-style: italic; }
.hero p { max-width: 560px; color: rgba(243,237,224,.78); font-size: 15.5px; }
.hero-progress { margin-top: 30px; max-width: 520px; }
.hero-progress .hp-label { display: flex; justify-content: space-between; font-size: 12.5px; color: rgba(243,237,224,.65); margin-bottom: 7px; font-family: var(--font-mono); }
.hp-bar { height: 7px; border-radius: 99px; background: rgba(243,237,224,.14); overflow: hidden; }
.hp-fill { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--gold), var(--accent)); width: 0; transition: width 1.1s cubic-bezier(.22,1,.36,1); }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-bottom: 34px;
}
.stat {
  padding: 20px 18px 16px;
  border-top: 3px solid var(--ink);
}
.stat-num { font-family: var(--font-display); font-size: 38px; font-weight: 650; line-height: 1; }
.stat-num small { font-size: 17px; color: var(--ink-3); font-weight: 500; }
.stat-label { font-size: 12.5px; color: var(--ink-3); margin-top: 8px; letter-spacing: .08em; }
.stat:nth-child(1) { border-top-color: var(--accent); }
.stat:nth-child(2) { border-top-color: var(--c-der); }
.stat:nth-child(3) { border-top-color: var(--c-das); }
.stat:nth-child(4) { border-top-color: var(--c-die); }
.stat:nth-child(5) { border-top-color: var(--gold); }

.section-title {
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 640;
  margin: 38px 0 16px;
  display: flex; align-items: center; gap: 12px;
}
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.module-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(238px, 1fr)); gap: 14px; }
.module {
  padding: 22px 20px;
  display: block;
  text-decoration: none;
  color: var(--ink);
  transition: transform .22s, box-shadow .22s;
  position: relative;
  overflow: hidden;
}
.module:hover { transform: translateY(-3px); box-shadow: 0 4px 8px rgba(32,27,20,.06), 0 16px 40px rgba(32,27,20,.1); }
.module-num { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3); letter-spacing: .18em; }
.module-de { font-family: var(--font-display); font-size: 20px; font-weight: 640; margin: 9px 0 3px; }
.module-zh { font-size: 13px; color: var(--ink-3); }
.module-desc { font-size: 13px; color: var(--ink-2); margin-top: 12px; line-height: 1.55; }

.focus-box {
  margin-top: 38px;
  padding: 26px 28px;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.focus-box h3 { font-family: var(--font-display); font-size: 19px; margin-bottom: 8px; }
.focus-box p { font-size: 14px; color: var(--ink-2); }

/* ---------------- 课程页 ---------------- */
.level-head {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 34px 0 14px;
  display: flex; align-items: center; gap: 10px;
}
.level-head::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.lesson { margin-bottom: 14px; overflow: hidden; }
.lesson-head {
  display: flex; align-items: center; gap: 16px;
  padding: 19px 22px;
  cursor: pointer;
  user-select: none;
  transition: background .18s;
}
.lesson-head:hover { background: var(--paper-3); }
.lesson-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 21px;
  color: var(--accent);
  min-width: 52px;
}
.lesson-titles { flex: 1; }
.lesson-titles .lt-de { font-family: var(--font-display); font-weight: 640; font-size: 18.5px; }
.lesson-titles .lt-zh { font-size: 13px; color: var(--ink-3); margin-top: 1px; }
.lesson-meta { display: flex; align-items: center; gap: 9px; }
.lesson-date { font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); }
.review-dot {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--line);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; color: transparent;
  cursor: pointer; transition: all .2s;
  flex-shrink: 0;
}
.review-dot.done { background: var(--ok); border-color: var(--ok); color: #fff; }
.lesson-caret { color: var(--ink-3); transition: transform .25s; font-size: 13px; }
.lesson.open .lesson-caret { transform: rotate(90deg); }

.lesson-body { display: none; border-top: 1px dashed var(--line); padding: 24px 26px 26px; }
.lesson.open .lesson-body { display: block; animation: fadeSlide .3s ease; }
@keyframes fadeSlide { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

.lesson-summary { font-size: 14.5px; color: var(--ink-2); margin-bottom: 20px; }
.lb-label { font-family: var(--font-mono); font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); margin: 18px 0 9px; }
.grammar-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.grammar-list li { font-size: 14px; padding-left: 18px; position: relative; color: var(--ink-2); }
.grammar-list li::before { content: "§"; position: absolute; left: 0; color: var(--gold); font-family: var(--font-display); }

.sentence-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.sentence-table td { padding: 8px 12px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.sentence-table tr:last-child td { border-bottom: none; }
.sentence-table .s-de { font-weight: 500; width: 55%; }
.sentence-table .s-zh { color: var(--ink-3); font-size: 13px; }

.focus-inline {
  margin-top: 18px; padding: 13px 16px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
  border-radius: 8px;
  font-size: 13.5px; color: var(--ink-2);
}
.lesson-vocab-link { margin-top: 16px; font-size: 13px; }
.lesson-vocab-link a { color: var(--accent); text-decoration: none; border-bottom: 1px dotted var(--accent); }

/* ---------------- 生词表 ---------------- */
.vocab-toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; align-items: center; }
.vocab-search {
  flex: 1; min-width: 200px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: var(--paper-2);
  font: inherit; font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.vocab-search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(180,85,29,.12); }
.chip {
  padding: 6px 13px;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  font-size: 12.5px;
  cursor: pointer;
  color: var(--ink-2);
  transition: all .18s;
  font-family: var(--font-body);
}
.chip:hover { border-color: var(--ink-3); }
.chip.on { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }

.vocab-count { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); margin-bottom: 14px; }

.vocab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 12px; }
.vcard { perspective: 900px; height: 108px; cursor: pointer; }
.vcard-inner {
  position: relative; width: 100%; height: 100%;
  transition: transform .5s cubic-bezier(.4,.1,.2,1);
  transform-style: preserve-3d;
}
.vcard.flip .vcard-inner { transform: rotateY(180deg); }
.vface {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 12px;
  border: 1px solid var(--line-soft);
  background: var(--paper-2);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: flex; flex-direction: column; justify-content: center;
}
.vface.back { transform: rotateY(180deg); background: var(--ink); color: var(--paper-2); border-color: var(--ink); }
.v-de { font-family: var(--font-display); font-size: 16.5px; font-weight: 620; line-height: 1.25; }
.v-de.pos-der { color: var(--c-der); }
.v-de.pos-die { color: var(--c-die); }
.v-de.pos-das { color: var(--c-das); }
.v-de.pos-verb { color: var(--c-verb); }
.v-de.pos-adj { color: var(--c-adj); }
.v-de.pos-adv, .v-de.pos-phrase, .v-de.pos-pl { color: var(--ink-2); }
.v-ipa { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); margin-top: 5px; }
.v-pron { font-size: 12.5px; color: var(--c-adj); margin-top: 3px; font-weight: 600; letter-spacing: .02em; }
.v-back-pron { font-size: 12.5px; color: var(--gold); margin-top: 5px; font-weight: 600; }
.v-zh { font-size: 15px; font-weight: 600; line-height: 1.35; }
.v-back-meta { font-size: 11.5px; color: rgba(253,250,243,.55); margin-top: 6px; font-family: var(--font-mono); }
.v-hint { position: absolute; right: 10px; top: 10px; font-size: 10px; color: var(--ink-3); opacity: .7; }

/* ---------------- 语法页 ---------------- */
.grammar-item { margin-bottom: 13px; overflow: hidden; }
.grammar-head {
  display: flex; align-items: center; gap: 14px;
  padding: 17px 22px;
  cursor: pointer; user-select: none;
  transition: background .18s;
}
.grammar-head:hover { background: var(--paper-3); }
.grammar-head .g-tag {
  font-family: var(--font-mono); font-size: 10.5px;
  border: 1px solid var(--gold); color: var(--gold);
  padding: 2px 8px; border-radius: 99px; letter-spacing: .1em;
}
.grammar-head .g-title { font-family: var(--font-display); font-size: 18px; font-weight: 640; }
.grammar-head .g-de { font-size: 12.5px; color: var(--ink-3); margin-left: auto; font-style: italic; font-family: var(--font-display); }
.grammar-body { display: none; border-top: 1px dashed var(--line); padding: 20px 26px 24px; }
.grammar-item.open .grammar-body { display: block; animation: fadeSlide .3s ease; }
.grammar-item.open .g-caret { transform: rotate(90deg); }
.g-caret { color: var(--ink-3); font-size: 13px; transition: transform .25s; }
.grammar-body .rule { font-size: 14.5px; color: var(--ink-2); margin-bottom: 14px; }
.grammar-body .tip {
  margin-top: 14px; font-size: 13.5px; color: var(--ink-2);
  background: var(--paper); border: 1px solid var(--line-soft);
  border-left: 3px solid var(--gold);
  padding: 11px 15px; border-radius: 8px;
}
.grammar-body table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 6px 0 4px; }
.grammar-body th {
  text-align: left; font-size: 11.5px; letter-spacing: .08em;
  color: var(--ink-3); font-weight: 600;
  padding: 7px 10px; border-bottom: 2px solid var(--line);
}
.grammar-body td { padding: 7px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.grammar-body tr:last-child td { border-bottom: none; }
.grammar-body em { color: var(--ink); }
.grammar-body b { color: var(--accent); }
.grammar-body s { color: var(--bad); }

/* ---------------- 课文页 ---------------- */
.text-tabs { display: flex; gap: 10px; margin-bottom: 24px; flex-wrap: wrap; }
.text-tab {
  padding: 13px 20px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  transition: all .2s;
}
.text-tab .tt-de { font-family: var(--font-display); font-weight: 640; font-size: 16px; display: block; }
.text-tab .tt-meta { font-size: 11.5px; color: var(--ink-3); font-family: var(--font-mono); }
.text-tab.on { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }
.text-tab.on .tt-meta { color: rgba(253,250,243,.6); }

.text-intro { font-size: 14px; color: var(--ink-2); margin-bottom: 22px; max-width: 680px; }
.text-controls { display: flex; gap: 10px; margin-bottom: 20px; }
.btn {
  padding: 8px 16px;
  border-radius: 99px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  font: inherit; font-size: 13px;
  cursor: pointer; color: var(--ink-2);
  transition: all .18s;
}
.btn:hover { border-color: var(--ink); color: var(--ink); }
.btn.primary { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }

.para { margin-bottom: 16px; overflow: hidden; }
.para-head {
  display: flex; align-items: baseline; gap: 12px;
  padding: 14px 20px 10px;
}
.para-no {
  font-family: var(--font-display); font-style: italic;
  color: var(--accent); font-size: 15px; min-width: 20px;
}
.para-title { font-size: 13px; letter-spacing: .12em; color: var(--ink-3); font-weight: 600; }
.para-mp3 {
  margin-left: auto; flex-shrink: 0;
  border: none; background: none; cursor: pointer;
  font-size: 15px; padding: 4px 6px; opacity: .6;
  transition: opacity .15s, transform .15s;
}
.para-mp3:hover { opacity: 1; transform: scale(1.18); }
.para-de { padding: 0 22px 6px 52px; font-family: var(--font-display); font-size: 17.5px; line-height: 1.75; font-weight: 480; }
.para-zh { padding: 0 22px 6px 52px; font-size: 13.5px; color: var(--ink-3); border-left: 2px solid var(--gold); margin-left: 52px; padding-left: 14px; margin-right: 22px; padding-right: 0; }
.para-verbs { padding: 8px 22px 16px 52px; display: flex; flex-wrap: wrap; gap: 7px; }
.verb-chip {
  font-size: 11.5px;
  font-family: var(--font-mono);
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 6px;
  padding: 3px 9px;
  border: 1px solid #E9CDB6;
}
.para-notes {
  margin: 12px 22px 4px 52px; padding: 11px 15px;
  background: var(--paper-2); border: 1px solid var(--line);
  border-left: 3px solid var(--accent); border-radius: 8px;
}
.para-notes .pn-title { display: block; font-size: 12.5px; font-weight: 700; color: var(--accent); margin-bottom: 5px; letter-spacing: .04em; }
.para-notes ul { margin: 0; padding-left: 18px; }
.para-notes li { font-size: 13px; color: var(--ink-2); line-height: 1.6; margin: 3px 0; }
.para-notes li b { color: var(--ink); font-weight: 600; }
.hide-zh .s-zh { display: none; }

/* ---------------- 练习页 ---------------- */
.quiz-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(215px, 1fr)); gap: 14px; }
.quiz-card { padding: 22px 20px; cursor: pointer; transition: transform .22s, box-shadow .22s; }
.quiz-card:hover { transform: translateY(-3px); box-shadow: 0 4px 8px rgba(32,27,20,.06), 0 16px 40px rgba(32,27,20,.1); }
.quiz-card .qc-de { font-family: var(--font-display); font-size: 20px; font-weight: 640; margin: 8px 0 2px; }
.quiz-card .qc-title { font-size: 13.5px; color: var(--ink-2); font-weight: 600; }
.quiz-card .qc-desc { font-size: 12.5px; color: var(--ink-3); margin-top: 9px; line-height: 1.5; }
.quiz-card .qc-best { font-family: var(--font-mono); font-size: 11px; color: var(--gold); margin-top: 11px; }

.quiz-stage { max-width: 680px; }
.quiz-topbar { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.quiz-dots { display: flex; gap: 6px; flex: 1; }
.qdot { width: 9px; height: 9px; border-radius: 50%; background: var(--line); transition: all .2s; }
.qdot.cur { background: var(--ink); transform: scale(1.25); }
.qdot.ok { background: var(--ok); }
.qdot.bad { background: var(--bad); }
.quiz-score-label { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }

.quiz-qcard { padding: 34px 34px 28px; }
.quiz-q { font-family: var(--font-display); font-size: 27px; font-weight: 620; line-height: 1.35; margin-bottom: 24px; }
.quiz-q small { display: block; font-family: var(--font-body); font-size: 13px; color: var(--ink-3); font-weight: 400; margin-top: 8px; }
.quiz-opts { display: flex; flex-direction: column; gap: 10px; }
.opt {
  text-align: left;
  padding: 13px 18px;
  border-radius: 11px;
  border: 1.5px solid var(--line);
  background: var(--paper);
  font: inherit; font-size: 15.5px;
  cursor: pointer;
  transition: all .16s;
  color: var(--ink);
  display: flex; align-items: center; gap: 12px;
}
.opt .opt-key {
  font-family: var(--font-mono); font-size: 11px;
  width: 22px; height: 22px; border-radius: 6px;
  border: 1px solid var(--line);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink-3); flex-shrink: 0;
}
.opt:hover:not(:disabled) { border-color: var(--ink); transform: translateX(3px); }
.opt:disabled { cursor: default; opacity: .75; }
.opt.right { border-color: var(--ok); background: #EAF4EE; opacity: 1; }
.opt.right .opt-key { background: var(--ok); color: #fff; border-color: var(--ok); }
.opt.wrong { border-color: var(--bad); background: #F9EDEF; opacity: 1; }
.opt.wrong .opt-key { background: var(--bad); color: #fff; border-color: var(--bad); }
.opt.dim { opacity: .45; }
.quiz-explain {
  margin-top: 18px; font-size: 13.5px; color: var(--ink-2);
  background: var(--paper); border-left: 3px solid var(--gold);
  padding: 11px 15px; border-radius: 8px;
  display: none;
}
.quiz-explain.show { display: block; animation: fadeSlide .25s ease; }
.quiz-next-row { margin-top: 20px; display: flex; justify-content: space-between; align-items: center; }
.quiz-result { padding: 44px 38px; text-align: center; }
.qr-num { font-family: var(--font-display); font-size: 62px; font-weight: 650; line-height: 1; }
.qr-num small { font-size: 26px; color: var(--ink-3); }
.qr-label { color: var(--ink-2); margin: 12px 0 6px; font-size: 15px; }
.qr-verdict { font-family: var(--font-display); font-style: italic; font-size: 21px; color: var(--accent); margin-bottom: 26px; }
.qr-actions { display: flex; gap: 10px; justify-content: center; }

/* ---------------- 大纲页 ---------------- */
.kp-group { margin-bottom: 30px; }
.kp-group-title {
  font-family: var(--font-display); font-size: 19px; font-weight: 640;
  margin-bottom: 12px; display: flex; align-items: center; gap: 10px;
}
.kp-group-title .kp-count { font-family: var(--font-mono); font-size: 11px; color: var(--ink-3); }
.kp-list { display: flex; flex-direction: column; gap: 9px; }
.kp-item {
  display: flex; align-items: center; gap: 15px;
  padding: 14px 18px;
}
.kp-num {
  font-family: var(--font-display); font-style: italic;
  color: var(--ink-3); min-width: 26px; font-size: 16px;
}
.kp-body { flex: 1; }
.kp-de { font-weight: 600; font-size: 14.5px; }
.kp-zh { font-size: 12.5px; color: var(--ink-3); }
.kp-status { font-size: 11.5px; font-weight: 600; padding: 3px 11px; border-radius: 99px; letter-spacing: .05em; }
.kp-status.done { background: #EAF4EE; color: var(--ok); border: 1px solid #C4DECD; }
.kp-status.part { background: #FBF4E0; color: #96700A; border: 1px solid #E8D49A; }
.kp-status.todo { background: var(--paper-3); color: var(--ink-3); border: 1px solid var(--line); }
.kp-item[data-status="todo"] { opacity: .72; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 900px) {
  .nav-links {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--paper-2);
    border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch;
    padding: 10px 16px 16px;
    display: none;
    box-shadow: 0 24px 48px rgba(32,27,20,.14);
    max-height: calc(100vh - 64px); overflow-y: auto;
  }
  .nav-links.show { display: flex; }
  .nav-links a { padding: 12px 14px; font-size: 15px; }
  .nav-tools .nav-burger { display: inline-flex; }
  .page-wrap { padding: 88px 18px 48px; }
  .page-title { font-size: 32px; }
  .hero { padding: 40px 28px 36px; }
  .para-de, .para-verbs { padding-left: 20px; }
  .para-zh { margin-left: 20px; }
  .lesson-head { flex-wrap: wrap; gap: 10px; }
  .lesson-meta { width: 100%; }
  .quiz-qcard { padding: 24px 20px 20px; }
  .grammar-body { padding: 16px 16px 18px; }
  .grammar-body table { font-size: 12.5px; }
}

@media print {
  .topnav, .menu-toggle, .text-controls, .vocab-toolbar, .chip-row { display: none !important; }
  .page-wrap { padding: 0; }
  body::before { display: none; }
}

/* ============================================================
   暗色主题 / Dark Mode（参考私人站 toggleDark）
   ============================================================ */
[data-theme="dark"] {
  --paper: #17140F;
  --paper-2: #201C15;
  --paper-3: #2A241B;
  --ink: #EEE4D2;
  --ink-2: #BDB09A;
  --ink-3: #8D7F68;
  --line: #3E362A;
  --line-soft: #322B20;
  --accent-soft: #33241738;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 32px rgba(0,0,0,.35);
  --ok: #4FA97E;
  --bad: #D45A72;
  --c-der: #7FA8E8;
  --c-die: #E890A0;
  --c-das: #6FC294;
  --c-verb: #B39AE0;
  --c-adj: #E08A4E;
}
[data-theme="dark"] body { background: var(--paper); color: var(--ink); }
[data-theme="dark"] .topnav { background: rgba(23,20,15,.9); }
[data-theme="dark"] .tag-a1 { background: #1B2438; border-color: #34486E; }
[data-theme="dark"] .tag-a2 { background: #3A2416; border-color: #6B4426; }
[data-theme="dark"] .stat:nth-child(1) { border-top-color: var(--accent); }
[data-theme="dark"] .opt.right { background: #17301F; }
[data-theme="dark"] .opt.wrong { background: #3A1B23; }
[data-theme="dark"] .kp-status.done { background: #16301F; border-color: #2C5A3C; }
[data-theme="dark"] .kp-status.part { background: #33280F; border-color: #6B5220; }
[data-theme="dark"] .vface.back { background: #26211A; border-color: var(--line); color: var(--ink); }
[data-theme="dark"] .v-back-meta { color: var(--ink-3); }
[data-theme="dark"] .hero { background: radial-gradient(120% 160% at 88% -10%, rgba(201,162,39,.18), transparent 55%), radial-gradient(100% 140% at -8% 110%, rgba(180,85,29,.16), transparent 50%), #0F0D0A; }
[data-theme="dark"] .focus-box { background: #2A2118; }
[data-theme="dark"] .verb-chip { background: #33261A; border-color: #4A3524; }
[data-theme="dark"] .brand-mark { background: var(--ink); color: #17140F; }
[data-theme="dark"] .s-zh { border-left-color: #8A6C2F; }
[data-theme="dark"] .s-ipa { background: #33261A; color: #E0A96D; }
[data-theme="dark"] .para-notes { background: #2A2118; border-color: #4A3524; border-left-color: #C4652A; }

/* ============================================================
   Notion 笔记页（prose 排版 + 导入面板）
   ============================================================ */
.notes-layout { display: grid; grid-template-columns: 300px 1fr; gap: 22px; align-items: start; }
.note-list { max-height: calc(100vh - 200px); overflow-y: auto; position: sticky; top: 88px; }
.note-list-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.note-list-title { font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); }
.note-item {
  display: block; width: 100%; text-align: left;
  padding: 12px 14px; margin-bottom: 8px;
  border: 1px solid var(--line-soft); border-radius: 11px;
  background: var(--paper-2); cursor: pointer;
  font-family: var(--font-body);
  transition: border-color .18s, transform .18s;
}
.note-item:hover { border-color: var(--line); transform: translateX(2px); }
.note-item.on { border-color: var(--accent); background: var(--accent-soft); }
.note-item .ni-title { font-size: 13.5px; font-weight: 600; line-height: 1.4; color: var(--ink); }
.note-item .ni-meta { font-size: 11px; color: var(--ink-3); margin-top: 4px; font-family: var(--font-mono); display: flex; gap: 6px; flex-wrap: wrap; }
.ni-badge { padding: 1px 7px; border-radius: 99px; }
.ni-badge.builtin { background: #EDF2FB; color: var(--c-der); }
.ni-badge.imported { background: #EAF4EE; color: var(--ok); }
[data-theme="dark"] .ni-badge.builtin { background: #1B2438; }
[data-theme="dark"] .ni-badge.imported { background: #16301F; }

.note-reader { min-height: 60vh; }
.note-reader-head { margin-bottom: 20px; }
.nr-title { font-family: var(--font-display); font-size: 27px; font-weight: 650; line-height: 1.25; }
.nr-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 10px; align-items: center; }
.nr-source { font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); }
.nr-empty { padding: 60px 30px; text-align: center; color: var(--ink-3); font-size: 14px; }

/* Markdown 渲染（prose） */
.prose { font-size: 15px; line-height: 1.85; color: var(--ink-2); }
.prose h1, .prose h2, .prose h3, .prose h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.35; margin: 26px 0 12px; }
.prose h1 { font-size: 25px; }
.prose h2 { font-size: 21px; padding-bottom: 8px; border-bottom: 1px solid var(--line-soft); }
.prose h3 { font-size: 17.5px; }
.prose h4 { font-size: 15.5px; }
.prose p { margin: 10px 0; }
.prose strong { color: var(--ink); }
.prose em { color: var(--ink); }
.prose a { color: var(--accent); }
.prose ul, .prose ol { margin: 10px 0 10px 22px; }
.prose li { margin: 4px 0; }
.prose blockquote { border-left: 3px solid var(--gold); padding: 6px 16px; margin: 14px 0; background: var(--paper); border-radius: 0 8px 8px 0; color: var(--ink-2); }
.prose code { font-family: var(--font-mono); font-size: 13px; background: var(--paper-3); padding: 2px 6px; border-radius: 5px; }
.prose pre { background: var(--ink); color: #F0E8D8; padding: 16px 18px; border-radius: 11px; overflow-x: auto; margin: 14px 0; }
.prose pre code { background: none; padding: 0; font-size: 13px; line-height: 1.7; }
.prose table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 13.5px; }
.prose th { text-align: left; padding: 8px 10px; border-bottom: 2px solid var(--line); font-size: 12px; color: var(--ink-3); letter-spacing: .04em; }
.prose td { padding: 8px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.prose tr:last-child td { border-bottom: none; }
.prose hr { border: none; border-top: 1px dashed var(--line); margin: 26px 0; }
.prose img { max-width: 100%; border-radius: 10px; margin: 10px 0; }

/* 导入面板 */
.import-panel { padding: 26px 26px 22px; margin-bottom: 22px; }
.import-panel h3 { font-family: var(--font-display); font-size: 19px; margin-bottom: 6px; }
.import-panel .ip-desc { font-size: 13px; color: var(--ink-2); margin-bottom: 16px; }
.dropzone {
  border: 2px dashed var(--line);
  border-radius: 13px;
  padding: 30px 18px;
  text-align: center;
  color: var(--ink-3);
  font-size: 13.5px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  background: var(--paper);
  margin-bottom: 14px;
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.dropzone .dz-main { font-size: 15px; font-weight: 600; margin-bottom: 5px; color: var(--ink); }
.dropzone .dz-hint { font-size: 12px; }
.import-status { font-size: 12.5px; font-family: var(--font-mono); color: var(--ok); margin-top: 10px; min-height: 18px; }
.import-status.err { color: var(--bad); }
.ip-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.ip-paste {
  width: 100%; min-height: 110px; margin-top: 12px;
  border: 1px solid var(--line); border-radius: 11px;
  background: var(--paper); color: var(--ink);
  font-family: var(--font-mono); font-size: 12.5px; line-height: 1.6;
  padding: 12px 14px; resize: vertical;
}
.sync-steps { counter-reset: step; margin: 14px 0 0 0; padding: 0; list-style: none; }
.sync-steps li { position: relative; padding: 10px 0 10px 46px; border-bottom: 1px dashed var(--line-soft); font-size: 13.5px; color: var(--ink-2); }
.sync-steps li:last-child { border-bottom: none; }
.sync-steps li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 4px; top: 10px;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--ink); color: var(--gold);
  font-family: var(--font-mono); font-size: 12px;
  display: flex; align-items: center; justify-content: center;
}
.sync-steps code { font-family: var(--font-mono); font-size: 12px; background: var(--paper-3); padding: 2px 7px; border-radius: 5px; color: var(--ink); }

@media (max-width: 900px) {
  .notes-layout { grid-template-columns: 1fr; }
  .note-list { position: static; max-height: 300px; }
}

/* ============================================================
   速查表 Referenz（数字/时间/颜色/四季）
   ============================================================ */
.ref-sec { padding: 28px 30px 26px; margin-bottom: 20px; }
.ref-h2 { font-family: var(--font-display); font-size: 23px; font-weight: 650; display: flex; align-items: baseline; gap: 12px; margin-bottom: 14px; }
.ref-h2 em { color: var(--accent); font-style: italic; }
.ref-no { font-family: var(--font-mono); color: var(--accent); font-size: 12px; letter-spacing: .18em; }
.ref-h3 { font-size: 14px; color: var(--ink-2); margin: 24px 0 10px; letter-spacing: .04em; padding-left: 10px; border-left: 3px solid var(--gold); }
.ref-tips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.ref-tip { font-size: 12px; background: var(--paper-3); border: 1px solid var(--line); padding: 4px 11px; border-radius: 99px; color: var(--ink-2); }
.ref-tip.warn { background: #FBF4E0; border-color: #E8D49A; color: #96700A; }

.ref-table { width: 100%; border-collapse: collapse; font-size: 13.5px; margin: 8px 0 4px; }
.ref-table th { text-align: left; font-size: 11.5px; letter-spacing: .06em; color: var(--ink-3); font-weight: 600; padding: 7px 10px; border-bottom: 2px solid var(--line); }
.ref-table td { padding: 7px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.ref-table tr:last-child td { border-bottom: none; }
.ref-n { font-family: var(--font-mono); color: var(--ink-3); width: 46px; font-size: 12px; }
.ref-de { font-weight: 650; color: var(--ink); }
.ref-ipa { font-family: var(--font-mono); font-size: 12px; color: var(--accent); white-space: nowrap; }
.ref-zh { color: var(--ink-2); }
.ref-note { font-size: 11.5px; color: var(--ink-3); font-weight: 400; }

.ref-numgrid { width: 100%; border-collapse: collapse; table-layout: fixed; margin: 8px 0 4px; }
.ref-numgrid td { border: 1px solid var(--line-soft); border-radius: 10px; padding: 10px 12px; width: 25%; vertical-align: top; background: var(--paper-2); }
.nc-n { font-family: var(--font-mono); font-size: 11px; color: var(--accent); }
.nc-de { font-weight: 650; font-size: 14px; color: var(--ink); margin: 2px 0; }
.nc-ipa { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3); }
.nc-zh { font-size: 11.5px; color: var(--c-adj); margin-top: 2px; }

[data-theme="dark"] .ref-tip.warn { background: #33280F; border-color: #6B5220; color: #E8D49A; }
[data-theme="dark"] .ref-numgrid td { border-color: var(--line-soft); background: var(--paper-2); }

@media (max-width: 900px) {
  .ref-sec { padding: 20px 16px 18px; }
  .ref-table { font-size: 12.5px; }
  .ref-ipa { white-space: normal; }
  .ref-numgrid td { width: 50%; }
}

/* ============================================================
   全站音标与朗读（句子级 IPA + ruby 词标 + 喇叭按钮）
   ============================================================ */
.s-line { display: flex; align-items: flex-start; gap: 9px; margin: 10px 0; }
.s-sp {
  border: none; background: none; cursor: pointer;
  font-size: 13px; padding: 4px 2px; opacity: .5;
  transition: opacity .15s, transform .15s; flex-shrink: 0;
}
.s-sp:hover { opacity: 1; transform: scale(1.15); }
.s-main { flex: 1; }
.s-text { font-family: var(--font-display); font-size: 17.5px; font-weight: 500; line-height: 1.75; color: var(--ink); }
.s-ipa {
  display: block; width: fit-content; max-width: 100%;
  font-family: var(--font-mono); font-size: 12px; color: var(--accent);
  margin-top: 5px; padding: 1px 9px; background: var(--accent-soft);
  border-radius: 5px; letter-spacing: .01em;
}
.s-zh {
  display: block; font-size: 13.5px; color: var(--ink-2);
  margin-top: 5px; padding-left: 10px; border-left: 2px solid var(--gold);
}
.sentence-table .s-ipa { display: block; }
.sentence-table .s-de { width: 58%; }
.sentence-table .s-sp { font-size: 11px; padding: 0 2px; }
.sentence-table .s-text { font-family: var(--font-display); font-size: 15.5px; display: inline; }

ruby.dh-ipa { ruby-position: over; cursor: pointer; }
ruby.dh-ipa rt {
  font-size: .52em; color: var(--accent);
  font-family: var(--font-mono); font-weight: 500;
}
ruby.dh-ipa:hover rt { color: var(--gold); }

#ipaToggle, #speedToggle {
  position: fixed; right: 18px; bottom: 18px; z-index: 70;
  padding: 10px 16px; border-radius: 99px;
  background: var(--ink); color: var(--paper-2);
  border: 1px solid var(--ink);
  font-family: var(--font-body); font-size: 12.5px; font-weight: 600;
  cursor: pointer; box-shadow: 0 8px 24px rgba(32,27,20,.28);
  transition: transform .18s, background .18s;
}
#speedToggle { bottom: 74px; }
#ipaToggle:hover, #speedToggle:hover { transform: translateY(-2px); }
#ipaToggle.on { background: var(--accent); border-color: var(--accent); }

@media (max-width: 900px) {
  .s-text { font-size: 16px; }
  #ipaToggle { bottom: 14px; right: 14px; }
  #speedToggle { bottom: 70px; right: 14px; }
}

/* ============================================================
   教材页 Lehrbuch
   ============================================================ */
.lbk-group { font-family: var(--font-display); font-size: 20px; color: var(--ink); margin: 24px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--line); }
.lbk-group-extra { margin-top: 36px; }
.lbk-extra { display: inline-block; font-family: var(--font-body); font-size: 11px; font-weight: 700; letter-spacing: .06em; color: #fff; background: var(--accent); border-radius: 5px; padding: 1px 7px; vertical-align: middle; }
.lbk-card { padding: 26px 28px 22px; margin-bottom: 20px; }
.lbk-head { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 18px; }
.lbk-num { font-family: var(--font-display); font-style: italic; font-size: 30px; color: var(--accent); line-height: 1; }
.lbk-title { flex: 1; }
.lbk-zh { font-family: var(--font-display); font-size: 21px; font-weight: 640; }
.lbk-de { font-size: 13px; color: var(--ink-3); font-weight: 400; font-style: italic; margin-left: 8px; }
.lbk-meta { font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); margin-top: 3px; }
.lbk-actions { display: flex; gap: 8px; flex-shrink: 0; flex-wrap: wrap; }
.lbk-viewer { margin-bottom: 20px; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.lbk-viewer iframe { width: 100%; height: 72vh; border: none; display: block; background: var(--paper-3); }
.lbk-cols { display: grid; grid-template-columns: 1fr 1.35fr; gap: 22px; margin: 6px 0 18px; }
.lbk-h4 { font-family: var(--font-display); font-size: 15px; font-weight: 640; margin: 16px 0 10px; color: var(--ink); }
.lbk-words { display: flex; flex-wrap: wrap; gap: 8px; }
.lbk-word {
  display: inline-flex; flex-direction: column; line-height: 1.25;
  border: 1px solid var(--line-soft); border-radius: 9px;
  background: var(--paper); padding: 6px 10px;
}
.lbk-word b { font-size: 13px; font-weight: 620; color: var(--ink); }
.lbk-word i { font-size: 11px; color: var(--ink-3); font-style: normal; }
.lbk-col .s-line { margin: 8px 0; }
.lbk-col .s-text { font-size: 15.5px; }
.s-zh-inline { font-size: 12.5px; color: var(--ink-3); display: block; }
.lbk-raw { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.lbk-raw summary { cursor: pointer; font-size: 13px; color: var(--ink-2); user-select: none; }
.lbk-raw pre {
  margin-top: 12px; background: var(--paper); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 16px 18px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 11.5px; line-height: 1.75; color: var(--ink-2);
  white-space: pre-wrap;
}

@media (max-width: 900px) {
  .lbk-card { padding: 20px 16px 16px; }
  .lbk-head { flex-wrap: wrap; }
  .lbk-cols { grid-template-columns: 1fr; gap: 6px; }
  .lbk-viewer iframe { height: 56vh; }
}

/* 导航项增多后的中等屏幕适配（10 项导航，1400px 以下收窄） */
@media (max-width: 1400px) and (min-width: 901px) {
  .nav-links { gap: 0; }
  .nav-links a { padding: 8px 9px; font-size: 12.5px; }
  .nav-links a span { display: none; }
  .nav-brand-sub { display: none; }
}

.lbk-star { color: var(--gold); font-size: .8em; margin-right: 2px; }

/* ============================================================
   生词表双 Tab + 全站词表
   ============================================================ */
.vocab-tabs { display: flex; gap: 8px; margin-bottom: 22px; }
.vtab {
  padding: 10px 18px; border-radius: 12px;
  border: 1px solid var(--line); background: var(--paper-2);
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  cursor: pointer; color: var(--ink-2); transition: all .18s;
}
.vtab:hover { border-color: var(--ink-3); }
.vtab.on { background: var(--ink); color: var(--paper-2); border-color: var(--ink); }

.wl-stats { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.wl-stat {
  font-size: 12.5px; color: var(--ink-2);
  background: var(--paper-2); border: 1px solid var(--line-soft);
  padding: 7px 14px; border-radius: 99px;
}
.wl-stat b { font-family: var(--font-display); font-size: 16px; color: var(--ink); margin-right: 3px; }
.wl-stat.dim { color: var(--ink-3); border-style: dashed; }

.wl-table-wrap { overflow-x: auto; }
.wl-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.wl-table th {
  text-align: left; font-size: 11.5px; letter-spacing: .06em; color: var(--ink-3);
  font-weight: 600; padding: 8px 10px; border-bottom: 2px solid var(--line);
  position: sticky; top: 0; background: var(--paper);
}
.wl-table td { padding: 7px 10px; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.wl-table tr:hover td { background: var(--paper-2); }
.wl-w { font-weight: 650; color: var(--ink); white-space: nowrap; }
.wl-w .s-sp { font-size: 11px; padding: 0 3px; }
.wl-base { font-size: 11px; color: var(--ink-3); margin-left: 8px; font-weight: 400; font-family: var(--font-mono); }
.wl-ipa { font-family: var(--font-mono); font-size: 12px; color: var(--accent); white-space: nowrap; }
.wl-zh { color: var(--ink-2); min-width: 110px; }
.wl-src { white-space: nowrap; }
.wl-src-chip {
  display: inline-block; font-size: 10.5px; padding: 1.5px 7px; margin-right: 3px;
  border-radius: 99px; background: var(--paper-3); color: var(--ink-3); border: 1px solid var(--line-soft);
}
.wl-n { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3); }

@media (max-width: 900px) {
  .wl-table { font-size: 12.5px; }
  .wl-src { display: none; }
  .vtab { flex: 1; text-align: center; padding: 10px 8px; font-size: 13px; }
}

/* 全站词表：中文谐音列 */
.wl-pron { color: var(--c-adj); font-size: 12.5px; min-width: 92px; }
.wl-zh { min-width: 120px; }
.wl-table th:nth-child(1) { width: 15%; }
.wl-table th:nth-child(2) { width: 19%; }
.wl-table th:nth-child(3) { width: 20%; }
.wl-table th:nth-child(4) { width: 18%; }
.wl-table th:nth-child(6) { width: 6%; text-align: right; }
.wl-table td:last-child { text-align: right; }

/* ============================================================
   词形变化 Formenlehre
   ============================================================ */
.fo-rules { padding: 22px 24px 18px; margin-bottom: 20px; }
.fo-rules-title { font-family: var(--font-display); font-size: 17px; font-weight: 640; margin-bottom: 14px; }
.fo-rule-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.fo-rule-grid > div {
  font-size: 12.5px; line-height: 1.65; color: var(--ink-2);
  background: var(--paper); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 10px 13px;
}
.fo-rule-grid b { display: block; color: var(--ink); font-size: 13px; margin-bottom: 3px; }
.fo-rule-grid code {
  font-family: var(--font-mono); font-size: 11.5px; background: var(--paper-3);
  padding: 1px 5px; border-radius: 4px; color: var(--accent);
}
.fo-rule-grid i { color: var(--ink-3); font-style: normal; }
.fo-rule-grid u { text-decoration-color: var(--accent); text-underline-offset: 2px; }
.fo-tip {
  margin-top: 14px; font-size: 12.5px; color: var(--ink-2);
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 9px 14px; border-radius: 0 8px 8px 0;
}
.fo-count { font-size: 12px; color: var(--ink-3); font-family: var(--font-mono); white-space: nowrap; }

.fo-table-wrap { overflow-x: auto; margin-bottom: 26px; }
.fo-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.fo-table th {
  text-align: left; font-size: 11px; letter-spacing: .05em; color: var(--ink-3);
  font-weight: 600; padding: 8px 9px; border-bottom: 2px solid var(--line);
  white-space: nowrap; position: sticky; top: 0; background: var(--paper);
}
.fo-table td { padding: 7px 9px; border-bottom: 1px solid var(--line-soft); vertical-align: top; white-space: nowrap; }
.fo-table tr:hover td { background: var(--paper-2); }
.fo-table .fo-group td {
  background: var(--paper-3); font-weight: 650; font-size: 12px; color: var(--ink);
  letter-spacing: .04em; position: sticky; left: 0;
}
.fo-de { font-weight: 650; color: var(--ink); }
.fo-de .fo-zh { display: block; font-size: 11px; color: var(--ink-3); font-weight: 400; margin-top: 2px; }
.fo-form { font-family: var(--font-mono); font-size: 12px; color: var(--ink-2); }
.fo-form.hot { color: var(--accent); font-weight: 600; }
.fo-part, .fo-praet { font-family: var(--font-mono); font-size: 12px; color: var(--c-verb); }
.fo-hilf { font-family: var(--font-mono); font-size: 12px; color: var(--c-die); }
.fo-typ { font-size: 11.5px; color: var(--ink-3); white-space: normal; min-width: 110px; }
.fo-pl { font-family: var(--font-mono); font-size: 12.5px; color: var(--c-das); font-weight: 600; }
.fo-zh2 { color: var(--ink-2); white-space: normal; min-width: 90px; }
.fo-empty { text-align: center; color: var(--ink-3); padding: 30px 0; }
.fo-h3 {
  font-family: var(--font-display); font-size: 15.5px; font-weight: 640;
  margin: 22px 0 8px; padding-left: 10px; border-left: 3px solid var(--gold);
}
.fo-table-dekl td:first-child { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-3); }
.fo-table-noun td:nth-child(4), .fo-table-adj td:last-child { white-space: normal; }

@media (max-width: 900px) {
  .fo-rule-grid { grid-template-columns: 1fr; }
  .fo-table { font-size: 12px; }
  .fo-table th, .fo-table td { padding: 6px 7px; }
}

/* 词形变化：语料变形索引 */
.fo-forms { white-space: normal; min-width: 240px; line-height: 2; }
.fo-chip {
  display: inline-block; margin: 0 4px 4px 0; padding: 1px 8px;
  border-radius: 99px; background: var(--paper-3);
  border: 1px solid var(--line-soft);
  font-family: var(--font-mono); font-size: 11.5px; color: var(--ink);
}
.fo-chip i { font-style: normal; font-size: 10px; color: var(--accent); margin-left: 4px; }
.fo-num { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); text-align: right; }
.fo-table-idx td { vertical-align: middle; }

/* 英文模式下隐藏「中文谐音」（中文专属记忆锚点） */
[data-lang="en"] .wl-pron,
[data-lang="en"] .v-pron,
[data-lang="en"] .v-back-pron { display: none !important; }
[data-lang="en"] .wl-table th:nth-child(4),
[data-lang="en"] .wl-table td:nth-child(4) { display: none !important; }
[data-lang="en"] .ref-table th:nth-child(4),
[data-lang="en"] .ref-table td:nth-child(4) { display: none !important; }
[data-lang="en"] .ref-numgrid .nc-zh { display: none !important; }
[data-lang="en"] .ref-table .ref-zh { display: none !important; }

/* ============================================================
   导航修复：11 项 + 工具按钮，防止右侧按钮被挤出屏幕
   ============================================================ */
.nav-links { min-width: 0; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-tools { flex-shrink: 0; }

/* 语言切换按钮：加宽、等宽字体，更容易找到 */
#langToggle {
  width: auto; min-width: 42px; padding: 0 11px;
  font-family: var(--font-mono); font-size: 12.5px; font-weight: 700;
  letter-spacing: .06em;
  background: var(--ink); color: var(--gold); border-color: var(--ink);
}
#langToggle:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* 英文模式下隐藏德语副标签（英文菜单更长，避免溢出） */
[data-lang="en"] .nav-links a span { display: none; }
[data-lang="en"] .nav-links a { padding: 8px 11px; }

/* 页脚不可点击的文字（如 Notion 笔记源） */
.footer-plain { opacity: .72; }

/* ============================================================
   导航：中文在上、德语在下（竖排，避免横向拥挤）
   ============================================================ */
.nav-links a {
  display: inline-flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 1px; line-height: 1.12;
  padding: 6px 12px;
}
.nav-links a .nl-de {
  font-size: 10.5px; opacity: .55;
  letter-spacing: .01em; font-weight: 400;
}
/* 品牌文字不换行 */
.nav-brand-title, .nav-brand-sub { white-space: nowrap; }
.nav-brand-title { font-size: 15px; }

@media (max-width: 1400px) and (min-width: 901px) {
  .nav-links a { padding: 8px 10px; }
}

/* ============================================================
   文本转 MP3（tts.html）
   ============================================================ */
.tts-card { padding: 22px 24px; max-width: 860px; }
.tts-notice { padding: 16px 20px; max-width: 860px; border-left: 4px solid var(--accent); line-height: 1.7; }
.tts-notice code { font-family: var(--font-mono, ui-monospace, monospace); background: rgba(0,0,0,.06); padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.tts-label { display: block; font-size: 13px; letter-spacing: .06em; color: var(--ink-3); font-weight: 600; margin-bottom: 8px; }
.tts-input {
  width: 100%; box-sizing: border-box; resize: vertical;
  font-family: var(--font-body, inherit); font-size: 16px; line-height: 1.7;
  padding: 14px 16px; border: 1px solid rgba(0,0,0,.14); border-radius: 10px;
  background: var(--card, #fff); color: var(--ink);
}
.tts-input:focus { outline: none; border-color: var(--accent); }
.tts-actions { margin: 12px 0 4px; display: flex; gap: 10px; }
.tts-opts { display: flex; gap: 20px; margin: 16px 0; flex-wrap: wrap; }
.tts-opt { display: flex; flex-direction: column; gap: 6px; }
.tts-opt label { font-size: 12px; letter-spacing: .06em; color: var(--ink-3); font-weight: 600; }
.tts-opt select {
  font-size: 14px; padding: 7px 10px; border-radius: 8px;
  border: 1px solid rgba(0,0,0,.14); background: var(--card, #fff); color: var(--ink);
}
.tts-gen { margin-top: 8px; }
.tts-status { margin: 12px 0 0; font-size: 14px; color: var(--ink-2); min-height: 20px; }
.tts-result { margin-top: 18px; padding-top: 18px; border-top: 1px solid rgba(0,0,0,.08); display: flex; flex-direction: column; gap: 12px; }
.tts-result audio { width: 100%; max-width: 620px; }