/* ===== 习思·阅读 子站样式（配合主站品牌色系） ===== */
:root {
    --primary: #1a5f7a;
    --primary-dark: #134b61;
    --accent: #e8903f;
    --accent-light: #f0a85c;
    --ink: #2b2118;
    --text-body: #4a4a5a;
    --text-light: #8a8a96;
    --paper: #fbf7ef;
    --paper-deep: #f4ecdd;
    --white: #ffffff;
    --shadow: 0 4px 18px rgba(43, 33, 24, 0.08);
    --shadow-hover: 0 12px 32px rgba(43, 33, 24, 0.16);
    --radius: 14px;
    --radius-lg: 22px;
    --jie1: #5b9bd5;
    --jie2: #55a868;
    --jie3: #dd8452;
    --jie4: #8172b3;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---- 顶部导航 ---- */
.yd-nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(251, 247, 239, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(43,33,24,0.08);
}
.yd-nav-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.yd-logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: var(--primary-dark); }
.yd-logo .logo-mark {
    width: 36px; height: 36px; border-radius: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 130%);
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 18px;
}
.yd-logo small { font-size: 12px; color: var(--text-light); font-weight: 500; }
.yd-links { display: flex; align-items: center; gap: 6px; }
.yd-links a {
    padding: 8px 16px; border-radius: 999px; font-size: 15px; color: var(--text-body);
    transition: all .25s;
}
.yd-links a:hover { background: var(--paper-deep); color: var(--primary-dark); }
.yd-links a.active { background: var(--primary); color: #fff; }
.yd-links a.home-link { border: 1px solid rgba(26,95,122,.35); color: var(--primary); }
.yd-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--primary-dark); }

/* ---- 面包屑 ---- */
.crumb { padding: 18px 0 0; font-size: 13.5px; color: var(--text-light); }
.crumb a { color: var(--primary); }
.crumb a:hover { text-decoration: underline; }

/* ---- 页面头 ---- */
.page-head { padding: 34px 0 10px; }
.page-head .eyebrow {
    display: inline-block; font-size: 13px; letter-spacing: 2px; color: var(--accent);
    font-weight: 700; margin-bottom: 8px;
}
.page-head h1 { font-size: 34px; color: var(--primary-dark); line-height: 1.3; }
.page-head p.sub { margin-top: 10px; color: var(--text-body); max-width: 760px; }

/* ---- 主页 Hero ---- */
.hero {
    position: relative; overflow: hidden;
    background: linear-gradient(160deg, #173f52 0%, #1a5f7a 46%, #2d8fb0 100%);
    color: #fff;
    display: flex; flex-direction: column;
    min-height: calc(100vh - 62px);
}
.hero-inner { position: relative; z-index: 2; padding: 52px 0 4px; }
.hero .badge {
    display: inline-block; padding: 6px 16px; border-radius: 999px;
    background: rgba(232,144,63,.18); border: 1px solid rgba(240,168,92,.5);
    color: #ffd9ae; font-size: 14px; margin-bottom: 18px;
}
.hero h1 { font-size: 46px; line-height: 1.25; letter-spacing: 2px; }
.hero h1 .hl { color: var(--accent-light); }
.hero .slogan { margin-top: 14px; font-size: 16.5px; color: rgba(255,255,255,.85); max-width: 640px; }
.hero-center {
    position: relative; z-index: 2; flex: 1;
    display: flex; align-items: center;
}
.hero-center .container { width: 100%; }
.stats-strip { display: flex; flex-wrap: wrap; gap: 14px; padding: 34px 0 8px; }
.stats-strip .stat {
    background: var(--white); border: 1px solid rgba(26,95,122,.14);
    border-radius: var(--radius); padding: 14px 22px; min-width: 118px;
    box-shadow: var(--shadow);
}
.stats-strip .stat b { display: block; font-size: 26px; color: var(--primary); }
.stats-strip .stat span { font-size: 13px; color: var(--text-body); }
.hero-wall { position: relative; height: 180px; }
.hero-wall img {
    width: 100%; height: 100%; object-fit: cover;
    -webkit-mask-image: linear-gradient(to bottom, transparent, #000 30%);
    mask-image: linear-gradient(to bottom, transparent, #000 30%);
    opacity: .9;
}
.hero-wall::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to bottom, rgba(23,63,82,0) 30%, var(--paper) 100%);
}

/* ---- 入口大卡 ---- */
.entry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding: 20px 0 26px; }
.entry-card {
    position: relative; display: block; border-radius: var(--radius-lg); overflow: hidden;
    background: var(--white); box-shadow: var(--shadow);
    transition: transform .3s, box-shadow .3s;
    border-top: 6px solid var(--primary);
}
.entry-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); }
.entry-card .ec-visual { height: 176px; overflow: hidden; position: relative; }
.entry-card .ec-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.entry-card:hover .ec-visual img { transform: scale(1.06); }
.entry-card .ec-visual .ec-icon {
    position: absolute; left: 24px; bottom: -30px;
    width: 64px; height: 64px; border-radius: 18px;
    display: flex; align-items: center; justify-content: center; font-size: 32px;
    background: #fff; box-shadow: var(--shadow);
}
.entry-card .ec-body { padding: 22px 28px 24px; }
.entry-card h2 { font-size: 26px; color: var(--primary-dark); }
.entry-card .ec-sub { margin-top: 8px; color: var(--text-body); font-size: 15px; min-height: 48px; }
.entry-card .ec-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.entry-card .ec-tags span {
    font-size: 12.5px; padding: 4px 12px; border-radius: 999px;
    background: var(--paper-deep); color: var(--text-body);
}
.entry-card .ec-go {
    margin-top: 18px; display: inline-flex; align-items: center; gap: 6px;
    color: var(--accent); font-weight: 700; font-size: 15px;
}
.entry-card.how-card { border-top-color: var(--primary); }
.entry-card.what-card { border-top-color: var(--accent); }

/* ---- 支柱卡片（怎么读总览） ---- */
.pillar-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; padding: 26px 0 20px; }
.pillar-card {
    display: block; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 28px; position: relative; overflow: hidden;
    transition: transform .3s, box-shadow .3s;
}
.pillar-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.pillar-card::before {
    content: attr(data-num); position: absolute; right: 14px; top: -18px;
    font-size: 110px; font-weight: 900; color: var(--paper-deep); z-index: 0;
}
.pillar-card h3 { position: relative; font-size: 23px; color: var(--primary-dark); z-index: 1; }
.pillar-card .p-tag {
    position: relative; z-index: 1; display: inline-block; margin-top: 6px;
    font-size: 12.5px; padding: 3px 12px; border-radius: 999px;
    background: rgba(26,95,122,.1); color: var(--primary);
}
.pillar-card p { position: relative; z-index: 1; margin-top: 12px; color: var(--text-body); font-size: 14.5px; }
.pillar-card .p-go { position: relative; z-index: 1; margin-top: 14px; color: var(--accent); font-weight: 700; font-size: 14px; }

/* ---- 通用小节 ---- */
.section { padding: 30px 0; }
.section-title { font-size: 26px; color: var(--primary-dark); margin-bottom: 6px; }
.section-desc { color: var(--text-body); margin-bottom: 22px; max-width: 780px; }

/* ---- 三阶卡片 ---- */
.stage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.stage-card {
    background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow);
    overflow: hidden; border-top: 6px solid var(--sc, var(--primary));
}
.stage-card .sc-head { padding: 22px 22px 12px; }
.stage-card .sc-grade {
    display: inline-block; font-size: 12.5px; font-weight: 700; color: #fff;
    background: var(--sc, var(--primary)); padding: 3px 12px; border-radius: 999px;
}
.stage-card h3 { margin-top: 10px; font-size: 21px; color: var(--ink); }
.stage-card .sc-vol { display: flex; gap: 10px; padding: 0 22px; }
.stage-card .sc-vol div {
    flex: 1; text-align: center; border-radius: var(--radius); padding: 10px 6px;
    background: var(--paper);
}
.stage-card .sc-vol b { display: block; font-size: 20px; color: var(--sc, var(--primary)); }
.stage-card .sc-vol span { font-size: 12px; color: var(--text-light); }
.stage-card .sc-body { padding: 14px 22px 22px; font-size: 14px; color: var(--text-body); }
.stage-card .sc-body p { margin-bottom: 10px; }
.stage-card .sc-body b { color: var(--ink); }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 10px; }
.tag-row span {
    font-size: 12px; padding: 3px 10px; border-radius: 999px;
    background: color-mix(in srgb, var(--sc, var(--primary)) 12%, #fff);
    color: var(--sc, var(--primary)); font-weight: 600;
}

/* ---- details 折叠 ---- */
details.fold {
    background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow);
    margin: 10px 0; overflow: hidden;
}
details.fold summary {
    cursor: pointer; padding: 13px 18px; font-weight: 700; color: var(--primary-dark);
    list-style: none; display: flex; align-items: center; justify-content: space-between;
    font-size: 15px;
}
details.fold summary::after { content: '＋'; color: var(--accent); font-size: 18px; }
details.fold[open] summary::after { content: '－'; }
details.fold .fold-body { padding: 0 18px 16px; font-size: 14px; color: var(--text-body); }

/* ---- 六维流程 ---- */
.flow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.flow-card {
    position: relative; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 24px; counter-increment: step;
}
.flow-card::before {
    content: counter(step); position: absolute; top: 16px; right: 20px;
    width: 34px; height: 34px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center;
}
.flow-card .fc-icon { font-size: 34px; }
.flow-card h3 { margin-top: 10px; font-size: 19px; color: var(--primary-dark); }
.flow-card .fc-op { margin-top: 8px; font-size: 14px; color: var(--text-body); min-height: 66px; }
.flow-card .fc-cap {
    margin-top: 10px; display: inline-block; font-size: 12.5px; font-weight: 700;
    color: var(--accent); background: rgba(232,144,63,.12); padding: 4px 12px; border-radius: 999px;
}

/* ---- 八图卡片 ---- */
.map-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.map-card {
    background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow);
    padding: 20px; text-align: center; transition: transform .3s, box-shadow .3s;
}
.map-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.map-card svg { width: 100%; height: 92px; }
.map-card h3 { margin-top: 10px; font-size: 17px; color: var(--primary-dark); }
.map-card .mc-think { font-size: 12.5px; color: var(--accent); font-weight: 700; margin-top: 2px; }
.map-card p { margin-top: 8px; font-size: 12.8px; color: var(--text-body); text-align: left; line-height: 1.6; }

/* ---- 十策略卡片 ---- */
.strategy-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.strategy-card {
    display: flex; gap: 16px; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 22px;
}
.strategy-card .st-num {
    flex: none; width: 46px; height: 46px; border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), #2d8fb0);
    color: #fff; font-size: 20px; font-weight: 800;
    display: flex; align-items: center; justify-content: center;
}
.strategy-card h3 { font-size: 18px; color: var(--primary-dark); }
.strategy-card .st-role { font-size: 13px; color: var(--accent); font-weight: 700; margin: 2px 0 8px; }
.strategy-card ul { margin: 0 0 10px 18px; font-size: 13.5px; color: var(--text-body); }
.strategy-card .st-groups { display: flex; flex-wrap: wrap; gap: 6px; }
.strategy-card .st-groups span {
    font-size: 11.5px; padding: 2px 10px; border-radius: 999px;
    background: var(--paper-deep); color: var(--text-body);
}

/* ---- 书单：级别区块 ---- */
.level-block { margin-bottom: 34px; }
.level-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.level-head .lv-chip {
    font-size: 15px; font-weight: 800; color: #fff; padding: 5px 16px;
    border-radius: 999px; background: var(--sc, var(--primary));
}
.level-head .lv-term { font-size: 14px; color: var(--text-light); font-weight: 600; }
.book-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.book-card {
    display: flex; gap: 16px; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 18px; transition: transform .3s, box-shadow .3s;
}
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.book-card .bc-cover {
    flex: none; width: 92px; height: 128px; border-radius: 8px; overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,.15); background: var(--paper-deep);
    display: flex; align-items: center; justify-content: center;
}
.book-card .bc-cover img { width: 100%; height: 100%; object-fit: contain; }
.book-card .bc-info { flex: 1; min-width: 0; }
.book-card h3 { font-size: 17px; color: var(--ink); line-height: 1.4; }
.book-card .bc-author { font-size: 12.5px; color: var(--text-light); margin-top: 3px; }
.book-card .bc-meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.book-card .bc-meta .q {
    font-size: 12px; font-weight: 700; padding: 2px 10px; border-radius: 999px;
    background: color-mix(in srgb, var(--sc, var(--primary)) 13%, #fff); color: var(--sc, var(--primary));
}
.book-card .bc-meta .c {
    font-size: 12px; padding: 2px 10px; border-radius: 999px;
    background: var(--paper-deep); color: var(--text-body);
}
.book-card .bc-sum { font-size: 13.5px; color: var(--text-body); margin-top: 8px; }
.book-card .bc-rec { font-size: 12.5px; color: var(--text-light); margin-top: 6px; }
.book-card .bc-rec b { color: var(--accent); font-weight: 600; }
.book-card details.fold { box-shadow: none; background: var(--paper); margin-top: 10px; }
.book-card details.fold summary { padding: 8px 14px; font-size: 13px; }
.book-card details.fold .fold-body { padding: 0 14px 12px; }
.course12 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; }
.course12 span {
    font-size: 12.5px; background: var(--white); border-radius: 8px; padding: 6px 10px;
    color: var(--text-body);
}
.course12 span b { color: var(--sc, var(--primary)); margin-right: 4px; }

/* ---- 阶梯地图（读什么总览） ---- */
.ladder { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.ladder-cell {
    border-radius: 10px; padding: 10px 8px; text-align: center; font-size: 13px;
    background: var(--white); box-shadow: var(--shadow);
}
.ladder-cell b { display: block; font-size: 15px; color: var(--sc, var(--primary)); }
.ladder-cell span { font-size: 11.5px; color: var(--text-light); }
.ladder-gap { grid-column: 1 / -1; text-align: center; font-size: 12.5px; color: var(--text-light); padding: 2px 0; }

/* ---- 阶入口卡 ---- */
.jie-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.jie-card {
    display: block; background: var(--white); border-radius: var(--radius-lg);
    box-shadow: var(--shadow); padding: 26px; border-left: 8px solid var(--sc, var(--primary));
    transition: transform .3s, box-shadow .3s;
}
.jie-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.jie-card .jc-grade { font-size: 13px; font-weight: 700; color: var(--sc, var(--primary)); }
.jie-card h3 { font-size: 22px; color: var(--ink); margin-top: 4px; }
.jie-card p { margin-top: 8px; font-size: 14px; color: var(--text-body); }
.jie-card .jc-meta { margin-top: 12px; display: flex; gap: 14px; font-size: 13px; color: var(--text-light); }
.jie-card .jc-meta b { color: var(--sc, var(--primary)); }
.jie-card .jc-go { margin-top: 12px; color: var(--accent); font-weight: 700; font-size: 14px; }

/* ---- 提示/引用条 ---- */
.note-bar {
    border-left: 5px solid var(--accent); background: var(--white);
    border-radius: 0 var(--radius) var(--radius) 0; box-shadow: var(--shadow);
    padding: 16px 20px; margin: 22px 0; font-size: 14.5px; color: var(--text-body);
}
.note-bar b { color: var(--primary-dark); }

/* ---- 上下页导航 ---- */
.pager { display: flex; justify-content: space-between; gap: 16px; padding: 30px 0 60px; }
.pager a {
    flex: 1; background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 16px 20px; font-size: 15px; color: var(--primary-dark); font-weight: 700;
    transition: all .25s;
}
.pager a:hover { box-shadow: var(--shadow-hover); color: var(--accent); }
.pager a.next { text-align: right; }
.pager a span { display: block; font-size: 12px; color: var(--text-light); font-weight: 500; }

/* ---- 页脚 ---- */
.yd-footer {
    margin-top: 40px; background: var(--primary-dark); color: rgba(255,255,255,.75);
    padding: 34px 0; font-size: 13.5px;
}
.yd-footer .f-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; }
.yd-footer a { color: #ffd9ae; }
.yd-footer .f-brand { font-size: 16px; font-weight: 800; color: #fff; }

/* ---- 搜索框 ---- */
.yd-search {
    position: relative; display: flex; align-items: center; gap: 10px;
    background: var(--white); border-radius: 999px; box-shadow: var(--shadow);
    padding: 6px 22px; margin: 18px 0 4px; border: 2px solid transparent;
    transition: border-color .25s;
}
.yd-search:focus-within { border-color: var(--accent); }
.yd-search .ys-icon { font-size: 17px; }
.yd-search input {
    flex: 1; border: none; outline: none; background: none;
    font-size: 15.5px; padding: 10px 0; color: var(--ink); font-family: inherit;
}
.yd-search-hint { font-size: 13px; color: var(--text-light); min-height: 22px; padding: 4px 8px 0; }
.yd-results {
    position: absolute; left: 0; right: 0; top: calc(100% + 8px); z-index: 30;
    background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow-hover);
    max-height: 420px; overflow-y: auto; display: none;
}
.yd-results.show { display: block; }
.yr-item {
    display: flex; align-items: center; gap: 12px; padding: 10px 16px;
    border-bottom: 1px solid var(--paper-deep); transition: background .2s;
}
.yr-item:hover { background: var(--paper); }
.yr-item img { width: 34px; height: 48px; object-fit: contain; border-radius: 4px; background: var(--paper-deep); flex: none; }
.yr-item .yr-main { flex: 1; min-width: 0; }
.yr-item .yr-main b { display: block; font-size: 14.5px; color: var(--ink); }
.yr-item .yr-main i { font-style: normal; font-size: 12.5px; color: var(--text-light); }
.yr-item .yr-go { color: var(--accent); font-weight: 700; }
.yr-more { padding: 10px 16px; font-size: 12.5px; color: var(--text-light); text-align: center; }

/* ---- 级别快捷跳转 ---- */
.lv-jumps { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0 4px; }
.lv-jump {
    font-size: 13px; font-weight: 700; padding: 5px 14px; border-radius: 999px;
    background: color-mix(in srgb, var(--sc, var(--primary)) 10%, #fff);
    color: var(--sc, var(--primary)); transition: all .2s;
}
.lv-jump:hover { background: var(--sc, var(--primary)); color: #fff; }

/* ---- 过滤隐藏 ---- */
.yd-hide { display: none !important; }

/* ---- LOGO 图片 ---- */
.yd-logo .logo-img {
    width: 38px; height: 38px; border-radius: 10px; box-shadow: 0 2px 8px rgba(19,75,97,.3);
}

/* ---- 响应式 ---- */
@media (max-width: 900px) {
    .hero { min-height: 0; }
    .hero h1 { font-size: 32px; }
    .entry-grid, .pillar-grid, .strategy-grid, .jie-grid, .book-grid { grid-template-columns: 1fr; }
    .stage-grid { grid-template-columns: 1fr; }
    .flow-grid { grid-template-columns: repeat(2, 1fr); }
    .map-grid { grid-template-columns: repeat(2, 1fr); }
    .ladder { grid-template-columns: repeat(2, 1fr); }
    .pager { flex-direction: column; }
    .pager a.next { text-align: left; }
}
@media (max-width: 640px) {
    /* 页面宽度与留白收紧 */
    .container { padding: 0 16px; }
    .crumb { padding-top: 12px; font-size: 12.5px; }
    .page-head { padding: 22px 0 6px; }
    .page-head h1 { font-size: 25px; }
    .page-head p.sub { font-size: 14px; }
    .section { padding: 22px 0; }
    .section-title { font-size: 21px; }

    /* 导航 */
    .yd-links {
        display: none; position: absolute; top: 62px; left: 0; right: 0;
        background: var(--paper); flex-direction: column; align-items: stretch;
        padding: 10px 16px 16px; border-bottom: 1px solid rgba(43,33,24,.1);
    }
    .yd-links.open { display: flex; }
    .yd-links a { padding: 12px; }
    .yd-toggle { display: block; }
    .yd-logo { font-size: 17px; }
    .yd-logo small { display: none; }

    /* Hero */
    .hero { min-height: 0; }
    .hero-inner { padding: 40px 0 6px; }
    .hero h1 { font-size: 27px; letter-spacing: 1px; }
    .hero .slogan { font-size: 14.5px; }
    .stats-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 22px 0 6px; }
    .stats-strip .stat { min-width: 0; padding: 10px 6px; text-align: center; }
    .stats-strip .stat b { font-size: 19px; }
    .stats-strip .stat span { font-size: 11px; }
    .hero-wall { height: 120px; }

    /* 入口大卡 */
    .entry-grid { gap: 18px; padding: 16px 0 20px; }
    .entry-card .ec-visual { height: 150px; }
    .entry-card .ec-body { padding: 18px 20px 20px; }
    .entry-card h2 { font-size: 22px; }
    .entry-card .ec-sub { min-height: 0; font-size: 14px; }

    /* 支柱/策略/六维/八图 */
    .flow-grid, .map-grid { grid-template-columns: 1fr; }
    .pillar-card { padding: 22px; }
    .pillar-card::before { font-size: 84px; }
    .strategy-card { padding: 18px; gap: 12px; }
    .strategy-card .st-num { width: 40px; height: 40px; font-size: 17px; }
    .map-card svg { height: 80px; }

    /* 三阶 */
    .stage-card .sc-vol b { font-size: 17px; }

    /* 书单卡片 */
    .book-card { padding: 14px; gap: 12px; border-radius: 16px; }
    .book-card .bc-cover { width: 76px; height: 106px; }
    .book-card h3 { font-size: 15.5px; }
    .book-card .bc-author { font-size: 11.5px; }
    .book-card .bc-sum { font-size: 13px; margin-top: 6px; }
    .book-card .bc-rec { font-size: 11.8px; }
    .level-head { flex-wrap: wrap; gap: 8px; }
    .course12 { grid-template-columns: 1fr; }

    /* 搜索 */
    .yd-search { padding: 4px 16px; margin-top: 12px; }
    .yd-search input { font-size: 16px; padding: 9px 0; }
    .yd-results { max-height: 60vh; }
    .lv-jump { font-size: 12.5px; padding: 4px 12px; }

    /* 阶梯与阶段卡 */
    .jie-card { padding: 20px; }
    .jie-card h3 { font-size: 19px; }
    .ladder-cell b { font-size: 13.5px; }

    /* 上下页/页脚 */
    .pager { padding: 22px 0 44px; }
    .yd-footer .f-inner { flex-direction: column; align-items: flex-start; gap: 10px; }
}
/* 超小屏（≤380px）书卡纵向排列 */
@media (max-width: 380px) {
    .book-card { flex-direction: column; align-items: center; text-align: center; }
    .book-card .bc-meta { justify-content: center; }
    .book-card details.fold summary { text-align: left; }
}