/* ============================================================
   古诗文阅读学习页 · 样式
   主题：金色宣纸（与记叙文阅读页一致）
   ============================================================ */
:root {
  --bg: #fdfaf5;
  --bg2: #f5efe0;
  --ink: #2c2416;
  --ink-soft: rgba(44, 36, 22, 0.72);
  --muted: #8c7b5e;
  --rule: #d9ceb8;
  --accent: #b8860b;
  --accent2: #5c4033;
  --accent-soft: rgba(184, 134, 11, 0.1);
  --accent2-soft: rgba(92, 64, 51, 0.1);
  --panel-border: #d9ceb8;
  --card-front-bg: #fdf8ed;
  --filter-bg: rgba(246, 237, 218, 0.6);
  --veil: rgba(250, 243, 226, 0.85);
  --ok: #3f7a47;
  --warn: #c0392b;
  --info: #2c6e91;
  --success: #2d8a56;
  --gold: #c9a84c;
  --purple: #7c3aed;
  --green: #2d8a56;
  --blue: #2c6e91;
  --red: #c0392b;
  --brown: #8a5a2b;
  --teal: #1f7a6d;
}

html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); }

.gs-container { max-width: 1100px; padding: 0.4rem 1rem 3rem; }

/* ---------- 页面头 ---------- */
.gs-page-header {
  text-align: center;
  padding: 1.2rem 0 1rem;
  border-bottom: 2px solid var(--rule);
  margin-bottom: 1rem;
}
.gs-page-header h1 {
  font-family: "STXingkai", "KaiTi", serif;
  font-size: clamp(1.7rem, 4.5vw, 2.2rem);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.3rem;
}
.gs-subtitle { color: var(--muted); font-size: 0.92rem; }

/* ---------- 锚点导航条 ---------- */
.gs-anchor-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  flex-wrap: wrap;
  padding: 0.5rem 0.7rem;
  margin: 0 0 1.6rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--veil);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0.6rem;
  z-index: 40;
}
.gs-anchor-nav a {
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: all 180ms ease;
  text-decoration: none;
}
.gs-anchor-nav a:hover, .gs-anchor-nav a.active {
  color: var(--accent);
  background: var(--accent-soft);
}

/* ---------- 七大板块 ---------- */
.gs-section {
  margin-bottom: 2.4rem;
  scroll-margin-top: 4.2rem;
}
.gs-section-head {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding-bottom: 0.6rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--accent);
}
.gs-section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  font-size: 1.25rem;
  color: #fff;
  flex-shrink: 0;
}
.gs-section-icon.c1 { background: linear-gradient(135deg, #b8860b, #d4a017); }
.gs-section-icon.c2 { background: linear-gradient(135deg, #2d8a56, #4caf50); }
.gs-section-icon.c3 { background: linear-gradient(135deg, #7c3aed, #9b59b6); }
.gs-section-icon.c4 { background: linear-gradient(135deg, #2c6e91, #4a90c2); }
.gs-section-icon.c5 { background: linear-gradient(135deg, #8a5a2b, #b08050); }
.gs-section-icon.c6 { background: linear-gradient(135deg, #c0392b, #d9604f); }
.gs-section-icon.c7 { background: linear-gradient(135deg, #1f7a6d, #2fa596); }
.gs-section-head h2 {
  font-family: "STXingkai", "KaiTi", serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink);
}
.gs-section-head .gs-sec-desc { color: var(--muted); font-size: 0.85rem; margin-top: 0.1rem; }

/* 板块内子锚点导航 */
.gs-sec-subnav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin: 0.6rem 0 0.9rem;
}
.gs-sec-subnav a {
  padding: 0.32rem 0.75rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-decoration: none;
  background: var(--card-front-bg);
  transition: all 150ms ease;
}
.gs-sec-subnav a:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 总览导航卡片 ---------- */
.gs-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}
.gs-nav-card {
  display: flex;
  gap: 0.9rem;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 20px 22px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  text-decoration: none;
  color: var(--ink);
  transition: transform 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.gs-nav-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
  border-color: var(--accent);
}
.gs-nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  font-size: 1.4rem;
  color: #fff;
  flex-shrink: 0;
}
.gs-nav-icon.c1 { background: linear-gradient(135deg, #b8860b, #d4a017); }
.gs-nav-icon.c2 { background: linear-gradient(135deg, #2d8a56, #4caf50); }
.gs-nav-icon.c3 { background: linear-gradient(135deg, #7c3aed, #9b59b6); }
.gs-nav-icon.c4 { background: linear-gradient(135deg, #2c6e91, #4a90c2); }
.gs-nav-icon.c5 { background: linear-gradient(135deg, #8a5a2b, #b08050); }
.gs-nav-icon.c6 { background: linear-gradient(135deg, #c0392b, #d9604f); }
.gs-nav-icon.c7 { background: linear-gradient(135deg, #1f7a6d, #2fa596); }
.gs-nav-body { flex: 1; min-width: 0; }
.gs-nav-body h3 { font-family: var(--font-heading); font-size: 1.08rem; font-weight: 700; color: var(--ink); margin-bottom: 0.3rem; }
.gs-nav-desc { color: var(--muted); font-size: 0.85rem; line-height: 1.6; margin-bottom: 0.5rem; }
.gs-nav-subs { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-bottom: 0.6rem; }
.gs-nav-sub {
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
}
.gs-nav-arrow {
  display: block;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  border-top: 1px dashed var(--rule);
  padding-top: 0.5rem;
}

/* ---------- 视频区 ---------- */
.gs-video {
  margin: 0 0 1rem;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--card-front-bg);
  overflow: hidden;
}
.gs-video .gs-video-title {
  padding: 0.55rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent2);
  background: var(--filter-bg);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.gs-video video { display: block; width: 100%; max-height: 420px; background: #000; }
.gs-video .gs-video-frame { background: #14100a; line-height: 0; }
.gs-video .gs-video-frame iframe { width: 100%; border: 0; display: block; }
.gs-video .gs-video-ph {
  padding: 2.2rem 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 26px, rgba(184, 134, 11, 0.06) 27px),
    var(--card-front-bg);
}
.gs-video .gs-video-ph .ph-ic { font-size: 2rem; display: block; margin-bottom: 0.4rem; }

/* ---------- 板块一 题材卡 ---------- */
.gs-tiicai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}
.gs-tiicai-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  scroll-margin-top: 4.2rem;
}
.gs-tiicai-card summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--ink);
}
.gs-tiicai-card summary::-webkit-details-marker { display: none; }
.gs-tiicai-card summary::after { content: '▾'; margin-left: auto; color: var(--muted); font-size: 0.8rem; transition: transform 200ms; }
.gs-tiicai-card[open] summary::after { transform: rotate(180deg); }
.gs-tiicai-card .tc-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #b8860b, #d4a017);
  color: #fff;
  font-size: 0.8rem;
  flex-shrink: 0;
}
.gs-tiicai-card .tc-body { padding: 0 18px 16px; font-size: 0.9rem; line-height: 1.8; }
.gs-tiicai-card .tc-rows { margin: 0.4rem 0; }
.gs-tiicai-card .tc-rows b { color: var(--accent); font-weight: 700; }
.gs-tiicai-card .tc-tags { display: flex; flex-wrap: wrap; gap: 0.35rem; margin: 0.4rem 0; }
.gs-tiicai-card .tc-tag {
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.78rem;
  background: var(--accent-soft);
  color: var(--accent);
}
.gs-tiicai-card .tc-works { border-top: 1px dashed var(--rule); padding-top: 0.5rem; margin-top: 0.4rem; }
.gs-tiicai-card .tc-work { font-size: 0.85rem; color: var(--ink-soft); margin: 0.2rem 0; }
.gs-tiicai-card .tc-work .w-line { color: var(--accent2); font-style: italic; }
.gs-tiicai-card .tc-judge {
  background: var(--accent2-soft);
  border-left: 3px solid var(--accent2);
  border-radius: 0 8px 8px 0;
  padding: 0.4rem 0.7rem;
  margin: 0.5rem 0;
}
.gs-tiicai-card .tc-confuse {
  background: #fdf3e3;
  border-left: 3px solid #d4a017;
  border-radius: 0 8px 8px 0;
  padding: 0.4rem 0.7rem;
  margin: 0.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.gs-tiicai-card .tc-conf-item {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
}
.gs-tiicai-card .tc-conf-item a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
}
.gs-tiicai-card .tc-conf-item a:hover { color: var(--accent2); border-bottom-color: var(--accent2); }
.gs-tiicai-card .tc-img-link {
  color: var(--accent2);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed var(--accent2);
  padding: 0 0.1rem;
}
.gs-tiicai-card .tc-img-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.gs-tiicai-card .tc-img-plain { color: var(--ink-soft); }
/* 意象卡题材标签 → 题材板块链接 */
.gs-img-card .img-tag {
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  background: var(--accent2-soft);
  color: var(--accent2);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.gs-img-card a.img-tag:hover { background: var(--accent-soft); color: var(--accent); }

/* ---------- 板块二 意象 / 板块三 典故 ---------- */
.gs-cat-tabs {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.9rem;
}
.gs-cat-tab {
  padding: 0.4rem 1rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: var(--bg2);
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 150ms ease;
}
.gs-cat-tab:hover { border-color: var(--accent); color: var(--accent); }
.gs-cat-tab.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }

.gs-img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 12px;
}
.gs-img-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  scroll-margin-top: 4.2rem;
}
.gs-img-card .img-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
}
.gs-img-card .img-meaning { color: var(--ink); font-size: 0.9rem; margin: 0.3rem 0; }
.gs-img-card .img-line {
  font-size: 0.83rem;
  color: var(--accent2);
  border-left: 3px solid var(--accent2-soft);
  background: var(--accent2-soft);
  border-radius: 0 0.5rem 0.5rem 0;
  padding: 0.4rem 0.6rem;
  margin-top: 0.4rem;
}
.gs-img-card .img-line .src { display: block; color: var(--muted); font-size: 0.75rem; margin-top: 0.2rem; }
.gs-img-card .img-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; margin: 0.35rem 0; }
.gs-img-card .img-tag {
  padding: 0.1rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  background: var(--accent2-soft);
  color: var(--accent2);
}
.gs-img-card .img-conf {
  margin-top: 0.4rem;
  padding: 0.45rem 0.6rem;
  border-radius: 0.5rem;
  background: rgba(44, 110, 145, 0.06);
  border-left: 3px solid var(--info);
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.gs-img-card .img-conf b { color: var(--info); }

/* 意境图谱 */
.gs-scene-wrap { margin-top: 1.2rem; }
.gs-scene-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent2);
  margin-bottom: 0.6rem;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid var(--rule);
}
.gs-scene-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 12px; }
.gs-scene-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 14px 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}
.gs-scene-card .sc-imgs { font-family: var(--font-heading); font-size: 1.02rem; font-weight: 700; color: var(--accent); }
.gs-scene-card .sc-to { color: var(--muted); font-size: 0.85rem; margin: 0.2rem 0; }
.gs-scene-card .sc-sentence { font-size: 0.85rem; line-height: 1.7; color: var(--ink-soft); border-top: 1px dashed var(--rule); padding-top: 0.45rem; margin-top: 0.45rem; }
.gs-scene-card .sc-src { display: block; color: var(--muted); font-size: 0.75rem; margin-top: 0.25rem; }

.gs-allusion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
}
.gs-allusion-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  scroll-margin-top: 4.2rem;
}
.gs-allusion-card summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
}
.gs-allusion-card summary::-webkit-details-marker { display: none; }
.gs-allusion-card summary::after { content: '▾'; margin-left: auto; color: var(--muted); font-size: 0.8rem; transition: transform 200ms; }
.gs-allusion-card[open] summary::after { transform: rotate(180deg); }
.gs-allusion-card .al-body { padding: 0 16px 14px; font-size: 0.88rem; line-height: 1.8; }
.gs-allusion-card .al-body b { color: var(--accent); }
.gs-allusion-card .al-tiicai-link {
  display: inline-block;
  margin: 0.1rem 0.3rem 0.1rem 0;
  padding: 0.08rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--accent2-soft);
  color: var(--accent2);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.gs-allusion-card a.al-tiicai-link:hover { background: var(--accent-soft); color: var(--accent); }

/* ---------- 板块四/七 技法与考点 ---------- */
.gs-lesson {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 14px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  scroll-margin-top: 4.2rem;
}
.gs-lesson h4 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent2);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.gs-lesson h4 .lv-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #2c6e91, #4a90c2);
  color: #fff;
  font-size: 0.8rem;
}
.gs-lesson .lv-overview { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 0.5rem; }
.gs-lesson .lv-method { margin: 0.5rem 0; }
.gs-lesson .lv-method .ms {
  display: flex;
  gap: 0.5rem;
  align-items: baseline;
  margin: 0.28rem 0;
  font-size: 0.9rem;
}
.gs-lesson .lv-method .ms i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg2);
  font-size: 0.72rem;
  font-style: normal;
  flex-shrink: 0;
}
.gs-lesson .lv-template {
  margin: 0.6rem 0;
  padding: 0.6rem 0.8rem;
  border-left: 3px solid var(--accent2);
  background: var(--accent2-soft);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.88rem;
}
.gs-lesson .lv-example {
  margin: 0.6rem 0;
  padding: 0.6rem 0.8rem;
  border-left: 3px solid var(--info);
  background: rgba(44, 110, 145, 0.07);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
}
.gs-lesson .lv-example b { color: var(--info); }

/* 考点升级：口诀 / 易错警示 / 真题直击 */
.gs-lesson .lv-slogan {
  margin: 0.6rem 0;
  padding: 0.55rem 0.9rem;
  border-left: 3px solid var(--accent);
  background: linear-gradient(90deg, rgba(184, 134, 11, 0.12), rgba(184, 134, 11, 0.02));
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.92rem;
  font-weight: 600;
  color: #8a6508;
  letter-spacing: 0.03em;
}
.gs-lesson .lv-pitfall {
  margin: 0.6rem 0;
  padding: 0.55rem 0.8rem;
  border-left: 3px solid #c0392b;
  background: rgba(192, 57, 43, 0.07);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #8f2f24;
}
.gs-lesson .lv-zhenti {
  margin: 0.6rem 0;
  padding: 0.55rem 0.8rem;
  border-left: 3px solid #2d8a56;
  background: rgba(45, 138, 86, 0.07);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: #226b42;
}

/* ==================== 考点独立页 ==================== */
/* 顶部翻页导航 */
.gs-kd-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin: 0.4rem 0 1.2rem;
  padding: 0.55rem 0.7rem;
  background: rgba(184, 134, 11, 0.08);
  border: 1px solid rgba(184, 134, 11, 0.25);
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.gs-kd-nav a {
  text-decoration: none;
  font-size: 0.85rem;
  color: #8a6508;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.gs-kd-nav a:hover { background: rgba(184, 134, 11, 0.16); }
.gs-kd-nav a.disabled { opacity: 0.4; pointer-events: none; }
.gs-kd-nav .gs-kd-nav-mid {
  font-weight: 700;
  background: rgba(184, 134, 11, 0.14);
  border: 1px solid rgba(184, 134, 11, 0.3);
}
.gs-kd-nav .gs-kd-nav-mid:hover { background: rgba(184, 134, 11, 0.24); }

/* 考点目录页 */
.gs-kd-intro {
  margin: 0.4rem 0 1.1rem;
  padding: 0.7rem 1rem;
  background: linear-gradient(90deg, rgba(184, 134, 11, 0.1), rgba(184, 134, 11, 0.03));
  border-left: 4px solid var(--accent);
  border-radius: 0 0.6rem 0.6rem 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.gs-kd-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}
.gs-kd-card {
  position: relative;
  display: flex;
  gap: 0.8rem;
  padding: 1.1rem 1.1rem 1rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  text-decoration: none;
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  overflow: hidden;
}
.gs-kd-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, #b8860b, #d4a54a);
}
.gs-kd-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 22px rgba(92, 64, 51, 0.12);
  border-color: rgba(184, 134, 11, 0.45);
}
.gs-kd-card .gs-kd-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #1f7a6d, #2fa596);
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  flex-shrink: 0;
}
.gs-kd-card .gs-kd-body { flex: 1; min-width: 0; }
.gs-kd-card h3 { font-size: 1.02rem; color: var(--ink); margin: 0 0 0.3rem; }
.gs-kd-card .gs-kd-slogan {
  font-size: 0.86rem;
  font-weight: 600;
  color: #8a6508;
  letter-spacing: 0.02em;
  margin-bottom: 0.3rem;
}
.gs-kd-card .gs-kd-desc {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.gs-kd-card .gs-nav-arrow {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
}

/* ==================== 考点进度与收藏 ==================== */
/* 目录页筛选条 */
.gs-kd-filter {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 0 0 0.9rem;
}
.gs-kd-filter-btn {
  border: 1px solid rgba(184, 134, 11, 0.3);
  background: #fff;
  color: #8a6508;
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
}
.gs-kd-filter-btn:hover { background: rgba(184, 134, 11, 0.08); }
.gs-kd-filter-btn.active {
  background: linear-gradient(135deg, #b8860b, #d4a54a);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
}
/* 目录卡片：状态徽章与收藏星 */
.gs-kd-card h3 { display: flex; align-items: center; gap: 0.4rem; flex-wrap: wrap; }
.gs-kd-status {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 0.14rem 0.5rem;
  border-radius: 999px;
  vertical-align: middle;
}
.gs-kd-status.done { background: rgba(45, 138, 86, 0.12); color: #2d8a56; }
.gs-kd-status.todo { background: rgba(140, 123, 94, 0.12); color: #8c7b5e; }
.gs-kd-star { font-size: 0.95rem; color: #d9ceb8; }
.gs-kd-star.on { color: #e6a23c; }
/* 考点页工具条 */
.gs-kd-toolbar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 0.9rem;
  padding: 0.55rem 0.85rem;
  background: rgba(184, 134, 11, 0.06);
  border: 1px dashed rgba(184, 134, 11, 0.35);
  border-radius: 0.6rem;
  font-size: 0.85rem;
}
.gs-kd-state { color: var(--muted); }
.gs-kd-state.on { color: #2d8a56; font-weight: 600; }
.gs-kd-fav-btn {
  border: 1px solid rgba(184, 134, 11, 0.35);
  background: #fff;
  color: #8a6508;
  border-radius: 999px;
  padding: 0.32rem 0.9rem;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.18s ease;
  font-family: inherit;
  white-space: nowrap;
}
.gs-kd-fav-btn:hover { background: rgba(184, 134, 11, 0.1); }
.gs-kd-fav-btn.on {
  background: linear-gradient(135deg, #e6a23c, #d4a54a);
  color: #fff;
  border-color: transparent;
  font-weight: 600;
}

/* 考点识别 */
.gs-lesson .lv-judge {
  margin: 0.6rem 0;
  padding: 0.55rem 0.8rem;
  border-left: 3px solid #c0392b;
  background: rgba(192, 57, 43, 0.06);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
}
.gs-lesson .lv-judge .jhead {
  display: flex; align-items: center; gap: 0.35rem;
  font-weight: 700; color: #c0392b; margin-bottom: 0.35rem;
}
.gs-lesson .lv-judge .jclue {
  display: inline-block;
  background: rgba(192, 57, 43, 0.12);
  color: #c0392b;
  padding: 0.1rem 0.5rem;
  border-radius: 1rem;
  font-size: 0.8rem;
  margin-left: 0.3rem;
}
.gs-lesson .lv-judge .jpat {
  color: var(--ink-soft);
  margin: 0.15rem 0;
  padding-left: 0.8rem;
  position: relative;
}
.gs-lesson .lv-judge .jpat::before {
  content: ''; position: absolute; left: 0.25rem; top: 0.65rem;
  width: 4px; height: 4px; border-radius: 50%; background: #c0392b;
}

/* 易混辨析 */
.gs-lesson .lv-confuse {
  margin: 0.6rem 0;
  padding: 0.55rem 0.8rem;
  border-left: 3px solid #e67e22;
  background: rgba(230, 126, 34, 0.06);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.86rem;
  line-height: 1.7;
}
.gs-lesson .lv-confuse .chead {
  font-weight: 700; color: #e67e22; margin-bottom: 0.35rem;
}
.gs-lesson .lv-confuse .cpair {
  margin: 0.2rem 0;
  padding: 0.3rem 0;
  border-bottom: 1px dashed rgba(230, 126, 34, 0.2);
}
.gs-lesson .lv-confuse .cpair:last-child { border-bottom: none; }
.gs-lesson .lv-confuse .cpname {
  display: inline-block;
  font-weight: 600; color: #e67e22;
  margin-right: 0.4rem;
}
.gs-lesson .lv-confuse .ctip {
  color: var(--ink-soft);
}

/* 关联题材标签 */
.gs-lesson .lv-tiicai {
  margin: 0.5rem 0;
  display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center;
}
.gs-lesson .lv-tiicai .tlabel {
  font-size: 0.82rem; color: var(--muted); font-weight: 600;
}
.gs-lesson .lv-tiicai .ttag {
  display: inline-block;
  padding: 0.12rem 0.55rem;
  border-radius: 1rem;
  font-size: 0.8rem;
  background: var(--accent2-soft);
  color: var(--accent2);
  border: 1px solid rgba(74, 144, 194, 0.2);
  cursor: pointer;
  transition: all 0.2s;
}
.gs-lesson .lv-tiicai .ttag:hover {
  background: var(--accent2); color: #fff;
}

/* 自测题 */
.gs-lesson .lv-quiz {
  margin: 0.6rem 0;
  border: 1px solid var(--rule);
  border-radius: 0.5rem;
  overflow: hidden;
}
.gs-lesson .lv-quiz summary {
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--accent2);
  background: var(--accent2-soft);
  user-select: none;
  list-style: none;
  display: flex; align-items: center; gap: 0.4rem;
}
.gs-lesson .lv-quiz summary::before {
  content: '▶'; font-size: 0.7rem; transition: transform 0.2s;
}
.gs-lesson .lv-quiz[open] summary::before { transform: rotate(90deg); }
.gs-lesson .lv-quiz summary::-webkit-details-marker { display: none; }
.gs-lesson .lv-quiz .qz-body {
  padding: 0.6rem 0.8rem;
  font-size: 0.86rem;
  line-height: 1.7;
}
.gs-lesson .lv-quiz .qz-group {
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}
.gs-lesson .lv-quiz .qz-group:last-child { border-bottom: none; }
.gs-lesson .lv-quiz .qz-q {
  color: var(--ink); margin-bottom: 0.5rem; font-weight: 500;
}
.gs-lesson .lv-quiz .qz-opt {
  display: block;
  padding: 0.28rem 0.5rem;
  margin: 0.2rem 0;
  border-radius: 0.35rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s;
  position: relative;
  padding-left: 1.8rem;
}
.gs-lesson .lv-quiz .qz-opt::before {
  content: attr(data-label);
  position: absolute;
  left: 0.5rem; top: 0.28rem;
  width: 1.1rem; height: 1.1rem;
  border: 1px solid var(--rule);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem; font-weight: 700; color: var(--muted);
}
.gs-lesson .lv-quiz .qz-opt:hover { background: var(--accent2-soft); }
.gs-lesson .lv-quiz .qz-opt.correct {
  background: rgba(39, 174, 96, 0.1);
  border-color: rgba(39, 174, 96, 0.3);
}
.gs-lesson .lv-quiz .qz-opt.correct::before {
  background: #27ae60; color: #fff; border-color: #27ae60;
}
.gs-lesson .lv-quiz .qz-opt.wrong {
  background: rgba(231, 76, 60, 0.08);
  border-color: rgba(231, 76, 60, 0.2);
}
.gs-lesson .lv-quiz .qz-opt.wrong::before {
  background: #e74c3c; color: #fff; border-color: #e74c3c;
}
.gs-lesson .lv-quiz .qz-explain {
  display: none;
  margin-top: 0.5rem;
  padding: 0.5rem 0.6rem;
  border-radius: 0.35rem;
  background: rgba(39, 174, 96, 0.06);
  border-left: 3px solid #27ae60;
  font-size: 0.83rem;
  color: var(--ink-soft);
  line-height: 1.6;
}
.gs-lesson .lv-quiz .qz-explain.show { display: block; }
.gs-lesson .lv-quiz .qz-explain b { color: #27ae60; }

/* 答题模板填空工具 */
.gs-tmpl-tool { padding-bottom: 1rem; }
.gs-tmpl-sel {
  width: 100%; max-width: 400px;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 0.5rem;
  font-size: 0.9rem; color: var(--ink);
  background: #fff;
  margin-bottom: 0.8rem;
  cursor: pointer;
}
.gs-tmpl-sel:focus { border-color: var(--accent2); outline: none; }
.gs-tmpl-stage { display: flex; flex-direction: column; gap: 0.6rem; }
.gs-tmpl-row { display: flex; flex-direction: column; gap: 0.4rem; }
.gs-tmpl-label { font-weight: 700; color: var(--accent2); font-size: 0.88rem; }
.gs-tmpl-inputs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.3rem;
  padding: 0.6rem 0.8rem;
  background: var(--accent2-soft);
  border-radius: 0.5rem;
  font-size: 0.88rem; line-height: 2;
}
.gs-tmpl-text { color: var(--ink); }
.gs-tmpl-inp {
  min-width: 80px; max-width: 200px;
  padding: 0.28rem 0.5rem;
  border: 1px dashed var(--accent2);
  border-radius: 0.35rem;
  font-size: 0.85rem; color: var(--ink);
  background: #fff;
}
.gs-tmpl-inp:focus { border-style: solid; outline: none; box-shadow: 0 0 0 2px rgba(74,144,194,0.15); }
.gs-tmpl-inp::placeholder { color: var(--muted); }
.gs-tmpl-hint {
  font-size: 0.82rem; color: var(--muted);
  padding: 0.4rem 0.6rem;
  border-left: 3px solid var(--info);
  background: rgba(44, 110, 145, 0.05);
  border-radius: 0 0.35rem 0.35rem 0;
}
.gs-tmpl-output {
  display: none;
  padding: 0.6rem 0.8rem;
  border-radius: 0.5rem;
  background: rgba(39, 174, 96, 0.06);
  border: 1px solid rgba(39, 174, 96, 0.2);
  font-size: 0.88rem; color: var(--ink);
  line-height: 1.8;
}
.gs-tmpl-output.show { display: block; }
.gs-tmpl-output b { color: #27ae60; }

/* ---------- 板块五 文言整合 ---------- */
.gs-wenyan-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 14px;
}
.gs-wenyan-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  scroll-margin-top: 4.2rem;
}
.gs-wenyan-card summary {
  list-style: none;
  cursor: pointer;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-family: var(--font-heading);
}
.gs-wenyan-card summary::-webkit-details-marker { display: none; }
.gs-wenyan-card summary::after { content: '▾'; margin-left: auto; color: var(--muted); font-size: 0.8rem; transition: transform 200ms; }
.gs-wenyan-card[open] summary::after { transform: rotate(180deg); }
.gs-wenyan-card .wy-body { padding: 0 18px 16px; font-size: 0.88rem; }
.gs-wenyan-card .wy-text { border-bottom: 1px dashed var(--rule); padding: 0.5rem 0; }
.gs-wenyan-card .wy-text:last-child { border-bottom: none; }
.gs-wenyan-card .wy-text b { color: var(--accent); font-family: var(--font-heading); font-size: 0.95rem; }
.gs-wenyan-card .wy-text .t-meta { color: var(--muted); font-size: 0.8rem; }
.gs-wenyan-card .wy-text p { margin: 0.2rem 0; line-height: 1.7; }
.gs-wenyan-card .wy-text .famous { color: var(--accent2); font-style: italic; }

/* ---------- 板块六 字词表 ---------- */
.gs-wenzi-toolbar {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 0.8rem;
}
.gs-wenzi-toolbar select, .gs-wenzi-toolbar input {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--rule);
  border-radius: 0.5rem;
  background: var(--bg2);
  font-size: 0.85rem;
  color: var(--ink);
}
.gs-wenzi-toolbar input { flex: 1; min-width: 160px; max-width: 280px; }
.gs-wenzi-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 12px;
  overflow: hidden;
}
.gs-wenzi-table thead th {
  position: sticky;
  top: 0;
  background: var(--filter-bg);
  padding: 0.55rem 0.7rem;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--accent2);
  border-bottom: 2px solid var(--rule);
  text-align: left;
  white-space: nowrap;
}
.gs-wenzi-table tbody td {
  padding: 0.5rem 0.7rem;
  border-bottom: 1px solid rgba(217, 206, 184, 0.5);
  line-height: 1.6;
}
.gs-wenzi-table tbody tr:nth-child(even) { background: rgba(246, 237, 218, 0.35); }
.gs-wenzi-table tbody tr:hover { background: var(--accent-soft); }
.gs-wenzi-table .w-word { font-weight: 700; color: var(--accent); white-space: nowrap; }
.gs-wenzi-table .w-mean { color: var(--ink); }
.gs-wenzi-table .w-src { color: var(--muted); font-size: 0.8rem; white-space: nowrap; }
.gs-wenzi-table .w-grade { color: var(--muted); font-size: 0.78rem; white-space: nowrap; }

/* ---------- 练习区 ---------- */
.gs-practice {
  margin-top: 1.2rem;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--card-front-bg);
  overflow: hidden;
}
.gs-practice-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  padding: 0.7rem 1rem;
  background: var(--filter-bg);
  border-bottom: 1px solid var(--rule);
}
.gs-practice-head .p-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent2);
}
.gs-diff-tabs { display: flex; gap: 0.35rem; margin-left: auto; flex-wrap: wrap; }
.gs-diff-tab {
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: var(--bg2);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 150ms ease;
}
.gs-diff-tab:hover { border-color: var(--accent); color: var(--accent); }
.gs-diff-tab.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.gs-practice-body { padding: 0.9rem 1rem 1rem; }

.gs-q-progress {
  text-align: center;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.8rem;
}
.gs-q-progress::before {
  content: '📝 ';
}

.gs-q {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.8rem;
  background: #fff;
}
.gs-q-head { display: flex; gap: 0.5rem; align-items: flex-start; margin-bottom: 0.4rem; }
.gs-q-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg2);
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
}
.gs-q-stem { font-size: 0.92rem; line-height: 1.7; }
.gs-q-stem .q-tag {
  display: inline-block;
  padding: 0.08rem 0.5rem;
  border-radius: 999px;
  font-size: 0.72rem;
  background: var(--accent-soft);
  color: var(--accent);
  margin-left: 0.4rem;
  vertical-align: middle;
}
.gs-material {
  margin: 0.5rem 0;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--gold);
  background: var(--filter-bg);
  border-radius: 0 0.5rem 0.5rem 0;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  line-height: 2;
  color: var(--ink);
}
.gs-material .mt-label { display: block; font-size: 0.75rem; color: var(--muted); font-family: var(--font-ui); margin-bottom: 0.2rem; }
.gs-source {
  display: inline-block;
  margin-top: 0.4rem;
  padding: 0.12rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  background: var(--accent2-soft);
  color: var(--accent2);
}
.gs-points {
  margin-top: 0.55rem;
  padding: 0.6rem 0.8rem;
  border-radius: 0.5rem;
  background: rgba(45, 138, 86, 0.06);
  border-left: 3px solid var(--success);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--ink-soft);
}
.gs-points b { color: var(--success); }
.gs-options { display: flex; flex-direction: column; gap: 0.4rem; margin: 0.5rem 0; }
.gs-opt {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--panel-border);
  border-radius: 0.6rem;
  background: var(--card-front-bg);
  font-size: 0.88rem;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: all 150ms ease;
}
.gs-opt:hover:not(.locked) { border-color: var(--accent); }
.gs-opt .opt-k {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--bg2);
  border: 1px solid var(--rule);
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}
.gs-opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.gs-opt.sel .opt-k { background: var(--accent); color: #fff; border-color: var(--accent); }
.gs-opt.correct { border-color: var(--success); background: rgba(45, 138, 86, 0.08); }
.gs-opt.correct .opt-k { background: var(--success); color: #fff; border-color: var(--success); }
.gs-opt.wrong { border-color: var(--warn); background: rgba(192, 57, 43, 0.07); }
.gs-opt.wrong .opt-k { background: var(--warn); color: #fff; border-color: var(--warn); }
.gs-opt.locked { cursor: default; }

.gs-q-actions { display: flex; gap: 0.55rem; align-items: center; margin-top: 0.7rem; flex-wrap: wrap; }
.gs-q-actions .gs-btn { min-height: 38px; padding: 0.42rem 1.2rem; font-size: 0.86rem; }
.gs-btn {
  padding: 0.42rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: var(--bg2);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 150ms ease;
}
.gs-btn:hover { box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3); transform: translateY(-1px); }
.gs-btn:disabled { opacity: 0.45; cursor: default; transform: none; box-shadow: none; }
.gs-btn.ghost { background: var(--bg2); color: var(--accent); }

.gs-fb {
  margin-top: 0.55rem;
  padding: 0.6rem 0.8rem;
  border-radius: 0.6rem;
  font-size: 0.85rem;
  line-height: 1.6;
  display: none;
}
.gs-fb.show { display: block; }
.gs-fb.ok { background: rgba(45, 138, 86, 0.08); border: 1px solid var(--success); color: var(--success); }
.gs-fb.err { background: rgba(192, 57, 43, 0.07); border: 1px solid var(--warn); color: var(--warn); }
.gs-fb .fb-ans { color: var(--success); font-weight: 700; }

.gs-short textarea {
  width: 100%;
  min-height: 76px;
  padding: 0.6rem;
  border: 1px solid var(--rule);
  border-radius: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.88rem;
  line-height: 1.7;
  resize: vertical;
  background: var(--bg2);
  box-sizing: border-box;
}
.gs-short textarea:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-soft); }
.gs-ref-answer {
  margin-top: 0.55rem;
  padding: 0.7rem 0.9rem;
  border-left: 3px solid var(--accent2);
  background: var(--accent2-soft);
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 0.85rem;
  line-height: 1.7;
  display: none;
}
.gs-ref-answer.show { display: block; }
.gs-ref-answer b { color: var(--accent2); }

/* 参考答案防复制：禁用文本选择 */
.gs-ref-answer, .gs-fb {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
.gs-copy-tip {
  position: fixed;
  left: 50%;
  bottom: 3.2rem;
  transform: translateX(-50%) translateY(10px);
  z-index: 9999;
  max-width: 90%;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  background: rgba(36, 34, 22, 0.92);
  color: #fff;
  font-size: 0.82rem;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
}
.gs-copy-tip.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- 速记卡 ---------- */
.gs-flash {
  margin-top: 1.2rem;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--card-front-bg);
  padding: 1rem 1.2rem 1.2rem;
}
.gs-flash-head { display: flex; align-items: baseline; gap: 0.6rem; margin-bottom: 0.8rem; flex-wrap: wrap; }
.gs-flash-head b { font-family: var(--font-heading); font-size: 1.05rem; color: var(--accent2); }
.gs-flash-sub { font-size: 0.8rem; color: var(--muted); }
.gs-flash-stage {
  display: flex;
  justify-content: center;
  margin-bottom: 0.8rem;
}
.gs-flash-card {
  width: 100%;
  max-width: 380px;
  height: 190px;
  perspective: 900px;
  cursor: pointer;
}
.gs-flash-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s;
  transform-style: preserve-3d;
}
.gs-flash-card.flip .gs-flash-inner { transform: rotateY(180deg); }
.gs-flash-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: 1px solid var(--rule);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  padding: 1rem;
  text-align: center;
}
.gs-flash-face .fc-name { font-family: var(--font-heading); font-size: 1.6rem; font-weight: 700; color: var(--accent); }
.gs-flash-face .fc-tip { font-size: 0.78rem; color: var(--muted); }
.gs-flash-back { transform: rotateY(180deg); background: var(--filter-bg); }
.gs-flash-back .fb-meaning { font-size: 0.95rem; color: var(--ink); line-height: 1.7; }
.gs-flash-back .fb-line { font-size: 0.85rem; color: var(--accent2); font-style: italic; margin-top: 0.3rem; }
.gs-flash-back .fb-src { font-size: 0.75rem; color: var(--muted); }
.gs-flash-ctrls { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; }
.gs-flash-progress { text-align: center; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.5rem; }

/* ---------- 互动工具：题材速判挑战 ---------- */
.gs-quiz {
  margin-top: 1.2rem;
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--card-front-bg);
  padding: 1rem 1.2rem 1.2rem;
}
.gs-quiz-title { display: flex; align-items: baseline; gap: 0.6rem; margin-bottom: 0.8rem; flex-wrap: wrap; }
.gs-quiz-title b { font-family: var(--font-heading); font-size: 1.05rem; color: var(--accent); }
.gs-quiz-title span { font-size: 0.8rem; color: var(--muted); }
.gs-quiz-progress { text-align: center; font-size: 0.8rem; color: var(--muted); margin-bottom: 0.6rem; }
.gs-quiz-stage { display: flex; flex-direction: column; align-items: center; gap: 0.6rem; }
.gs-quiz-poem {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  text-align: center;
  line-height: 1.7;
  padding: 0.6rem 0.9rem;
  background: var(--filter-bg);
  border-radius: 10px;
  width: 100%;
}
.gs-quiz-src { font-size: 0.8rem; color: var(--muted); }
.gs-quiz-opts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  width: 100%;
}
.gs-quiz-opt {
  border: 1.5px solid var(--rule);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  font-size: 0.9rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.gs-quiz-opt:hover:not(.locked) { border-color: var(--accent); color: var(--accent); }
.gs-quiz-opt.sel { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.gs-quiz-opt.correct { border-color: var(--accent2); background: var(--accent2-soft); color: var(--accent2); font-weight: 700; }
.gs-quiz-opt.wrong { border-color: var(--danger, #c0392b); background: rgba(192, 57, 43, 0.08); color: var(--danger, #c0392b); }
.gs-quiz-opt.locked { cursor: default; }
.gs-quiz-fb {
  width: 100%;
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  font-size: 0.9rem;
  line-height: 1.7;
}
.gs-quiz-fb.ok { background: var(--accent2-soft); color: var(--accent2); }
.gs-quiz-fb.err { background: rgba(192, 57, 43, 0.08); color: #a02818; }
.gs-quiz-fb .qz-why { margin-top: 0.3rem; font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- 互动工具：易混题材辨析 ---------- */
.gs-confuse { margin-top: 1.2rem; }
.gs-conf-pairs { display: flex; flex-direction: column; gap: 0.8rem; margin-bottom: 1.2rem; }
.gs-conf-pair {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  background: var(--card-front-bg);
  padding: 0.9rem 1.1rem;
}
.gs-conf-pair .cp-key {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.gs-conf-pair .cp-cols { display: flex; align-items: stretch; gap: 0.7rem; }
.gs-conf-pair .cp-col {
  flex: 1;
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  background: #fff;
}
.gs-conf-pair .cp-name { font-weight: 700; color: var(--ink); font-size: 0.95rem; margin-bottom: 0.25rem; }
.gs-conf-pair .cp-desc { font-size: 0.82rem; color: var(--ink-soft); line-height: 1.6; }
.gs-conf-pair .cp-vs {
  align-self: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.gs-conf-stage { display: flex; flex-direction: column; align-items: center; gap: 0.6rem; }
.gs-conf-prog { text-align: center; font-size: 0.8rem; color: var(--muted); margin: 0.6rem 0 0.3rem; }
.gs-flash-tc .gs-flash-back .fb-meaning { font-size: 0.88rem; }
.gs-flash-tc .gs-flash-back .fb-line { font-size: 0.82rem; }
@media (max-width: 560px) {
  .gs-conf-pair .cp-cols { flex-direction: column; }
  .gs-conf-pair .cp-vs { align-self: center; }
  .gs-quiz-poem { font-size: 1.1rem; }
}

/* ---------- AI 在线批改 ---------- */
.gs-btn.gs-ai-grade-btn {
  background: #e9f6f2;
  border: 1.5px solid #1f7a6d;
  color: #0d5a4f;
  font-weight: 700;
}
.gs-btn.gs-ai-grade-btn:hover { background: #d3ece5; opacity: 1; }
.gs-grade-box { margin-top: 0.8rem; }
.gs-grade-loading {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 0.9rem;
  border-radius: 0.6rem;
  background: var(--filter-bg);
  color: var(--muted);
  font-size: 0.85rem;
}
.gs-grade-loading.show { display: flex; }
.gs-grade-loading .spinner {
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--rule);
  border-top-color: var(--accent2);
  border-radius: 50%;
  animation: gs-spin 0.8s linear infinite;
}
@keyframes gs-spin { to { transform: rotate(360deg); } }
.gs-grade-error {
  padding: 0.7rem 0.9rem;
  border-radius: 0.6rem;
  background: rgba(192, 57, 43, 0.08);
  border: 1px solid var(--warn);
  color: var(--warn);
  font-size: 0.85rem;
}
.gs-grade-score {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.2rem;
  height: 2.8rem;
  border-radius: 999px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.6rem;
}
.gs-grade-score.high { background: var(--success); }
.gs-grade-score.mid { background: var(--accent2); }
.gs-grade-score.low { background: var(--accent); }
.gs-grade-body {
  background: var(--filter-bg);
  border: 1px solid var(--panel-border);
  border-radius: 0.8rem;
  padding: 0.7rem 0.9rem;
}
.gs-fb-item { font-size: 0.85rem; line-height: 1.7; margin-bottom: 0.5rem; }
.gs-fb-item:last-child { margin-bottom: 0; }
.gs-fb-item b { display: block; margin-bottom: 0.15rem; }
.gs-fb-item.good b { color: var(--success); }
.gs-fb-item.improve b { color: var(--accent); }
.gs-fb-item.suggest b { color: var(--accent2); }
.gs-grade-warn {
  padding: 0.5rem 0.7rem;
  border-radius: 0.5rem;
  background: rgba(192, 57, 43, 0.08);
  border-left: 3px solid var(--warn);
  color: var(--warn);
  font-size: 0.82rem;
  margin-bottom: 0.6rem;
}
.gs-grade-record {
  margin-top: 1rem;
  border-top: 1px dashed var(--rule);
  padding-top: 0.8rem;
}
.gs-record-title { font-size: 0.9rem; font-weight: 600; color: var(--ink); margin-bottom: 0.5rem; }
.gs-record-empty { font-size: 0.82rem; color: var(--muted); }
.gs-record-item {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  font-size: 0.82rem;
  padding: 0.35rem 0;
  border-bottom: 1px dashed var(--rule);
}
.gs-record-item .rec-time { color: var(--muted); flex-shrink: 0; }
.gs-record-item .rec-stem { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink); }
.gs-record-item .rec-score { color: var(--accent); font-weight: 700; flex-shrink: 0; }

/* ---------- 返回顶部 ---------- */
.gs-backtop {
  position: fixed;
  right: 1.2rem;
  bottom: 1.4rem;
  width: 44px;
  height: 44px;
  border: 1px solid var(--panel-border);
  border-radius: 50%;
  background: var(--veil);
  color: var(--accent);
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 200ms ease;
  z-index: 50;
}
.gs-backtop.show { opacity: 1; visibility: visible; transform: translateY(0); }
.gs-backtop:hover { background: var(--accent); color: var(--bg2); }

/* ---------- 移动端（≤768px） ---------- */
@media (max-width: 768px) {
  body { font-size: 15px; }
  .gs-container { padding: 0.3rem 0.7rem 2.5rem; }
  .gs-page-header { padding: 0.8rem 0 0.8rem; }
  .gs-page-header h1 { font-size: 1.45rem; letter-spacing: 0.04em; }
  .gs-subtitle { font-size: 0.78rem; line-height: 1.6; }

  /* 锚点导航：横滑 + 吸顶紧凑 */
  .gs-anchor-nav {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 12px;
    padding: 0.4rem 0.55rem;
    top: 0.4rem;
    scrollbar-width: none;
  }
  .gs-anchor-nav::-webkit-scrollbar { display: none; }
  .gs-anchor-nav a { flex-shrink: 0; font-size: 0.78rem; padding: 0.4rem 0.75rem; }

  /* 板块头 */
  .gs-section { margin-bottom: 1.8rem; scroll-margin-top: 3.8rem; }
  .gs-section-icon { width: 36px; height: 36px; font-size: 1.05rem; }
  .gs-section-head h2 { font-size: 1.08rem; }
  .gs-section-head .gs-sec-desc { font-size: 0.76rem; line-height: 1.5; }

  /* 视频区 */
  .gs-video .gs-video-title { font-size: 0.85rem; padding: 0.5rem 0.8rem; }
  .gs-video video { max-height: 240px; }
  .gs-video .gs-video-ph { padding: 1.6rem 0.8rem; font-size: 0.82rem; }
  .gs-video .gs-video-ph .ph-ic { font-size: 1.6rem; }

  /* 卡片区：单列 + 紧凑 */
  .gs-tiicai-grid, .gs-img-grid, .gs-allusion-grid, .gs-wenyan-grid, .gs-scene-grid, .gs-nav-grid { grid-template-columns: 1fr; gap: 10px; }
  .gs-nav-card { padding: 15px 16px; }
  .gs-nav-icon { width: 42px; height: 42px; font-size: 1.2rem; }
  .gs-nav-body h3 { font-size: 0.98rem; }
  .gs-tiicai-card summary, .gs-wenyan-card summary { padding: 12px 14px; font-size: 0.95rem; }
  .gs-tiicai-card .tc-body, .gs-wenyan-card .wy-body { padding: 0 14px 12px; font-size: 0.85rem; }
  .gs-img-card { padding: 12px 13px; }
  .gs-img-card .img-name { font-size: 1.05rem; }
  .gs-img-card .img-meaning { font-size: 0.85rem; }
  .gs-img-card .img-line { font-size: 0.8rem; }
  .gs-allusion-card .al-body { font-size: 0.84rem; }
  .gs-lesson { padding: 13px 14px; }
  .gs-lesson h4 { font-size: 0.96rem; }
  .gs-lesson .lv-overview, .gs-lesson .lv-template, .gs-lesson .lv-example { font-size: 0.84rem; }

  /* 练习区 */
  .gs-practice-head { padding: 0.55rem 0.7rem; }
  .gs-practice-head .p-title { font-size: 0.9rem; }
  .gs-diff-tab { padding: 0.4rem 0.85rem; font-size: 0.8rem; }
  .gs-practice-body { padding: 0.7rem 0.7rem 0.9rem; }
  .gs-q { padding: 0.75rem 0.8rem; margin-bottom: 0.7rem; }
  .gs-q-stem { font-size: 0.88rem; line-height: 1.65; }
  .gs-opt { padding: 0.7rem 0.75rem; font-size: 0.85rem; }
  .gs-btn { padding: 0.5rem 1.15rem; font-size: 0.85rem; min-height: 40px; }
  .gs-short textarea { font-size: 0.85rem; }
  .gs-ref-answer, .gs-fb, .gs-points { font-size: 0.82rem; }
  .gs-material { font-size: 0.86rem; }
  .gs-q-progress { font-size: 0.8rem; margin-bottom: 0.6rem; }

  /* 字词表：横向滚动防挤压 */
  .gs-wenzi-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; font-size: 0.78rem; white-space: nowrap; }
  .gs-wenzi-toolbar select, .gs-wenzi-toolbar input { font-size: 0.8rem; padding: 0.4rem 0.55rem; }

  /* 速记卡 */
  .gs-flash { padding: 0.8rem 0.7rem 1rem; }
  .gs-flash-card { height: 220px; }
  .gs-flash-face .fc-name { font-size: 1.4rem; }
  .gs-flash-face .fb-meaning { font-size: 0.88rem; }
  .gs-flash-face .fb-line { font-size: 0.8rem; }

  /* 意境图谱 */
  .gs-scene-title { font-size: 0.92rem; }
  .gs-scene-card { padding: 12px 13px; }
  .gs-scene-card .sc-imgs { font-size: 0.95rem; }
  .gs-scene-card .sc-sentence { font-size: 0.82rem; }
}

/* 小屏（≤480px）进一步紧凑 */
@media (max-width: 480px) {
  .gs-page-header h1 { font-size: 1.3rem; }
  .gs-section-head h2 { font-size: 1rem; }
  .gs-practice-head .p-title { display: none; }
  .gs-diff-tabs { margin-left: 0; }
  .gs-q-stem .q-tag { font-size: 0.68rem; margin-left: 0.2rem; }
  .gs-opt .opt-k { min-width: 1.3rem; height: 1.3rem; }
  .gs-flash-card { height: 200px; }
  .gs-anchor-nav a { font-size: 0.74rem; padding: 0.36rem 0.65rem; }
  .gs-backtop { width: 40px; height: 40px; right: 0.9rem; bottom: 1rem; }
  /* 互动工具小屏适配 */
  .gs-quiz { padding: 0.8rem 0.7rem 1rem; }
  .gs-quiz-title b { font-size: 0.95rem; }
  .gs-quiz-title span { font-size: 0.72rem; }
  .gs-quiz-poem { font-size: 1.05rem; padding: 0.5rem 0.6rem; }
  .gs-quiz-opt { padding: 0.42rem 0.8rem; font-size: 0.82rem; }
  .gs-conf-pair { padding: 0.75rem 0.8rem; }
  .gs-conf-pair .cp-name { font-size: 0.88rem; }
  .gs-conf-pair .cp-desc { font-size: 0.78rem; }
  .gs-tiicai-card .tc-conf-item { font-size: 0.8rem; }
  .gs-tiicai-card .tc-judge, .gs-tiicai-card .tc-confuse { padding: 0.35rem 0.55rem; font-size: 0.82rem; }
}