/* ==========================================================================
   小明词霸 - 现代化卡片风样式
   基于 Bootstrap 3 栅格,仅覆盖视觉层
   ========================================================================== */

:root {
    --xd-primary: #4a6cf7;
    --xd-primary-dark: #3652d9;
    --xd-accent: #7b5cf0;
    --xd-gradient: linear-gradient(135deg, #4a6cf7 0%, #7b5cf0 100%);
    --xd-text: #1f2430;
    --xd-text-weak: #6b7280;
    --xd-text-mute: #9aa3b2;
    --xd-bg: #f5f7fb;
    --xd-card: #ffffff;
    --xd-border: #eaeef5;
    --xd-radius: 16px;
    --xd-radius-sm: 10px;
    --xd-shadow: 0 2px 8px rgba(23, 43, 99, .05), 0 8px 24px rgba(23, 43, 99, .05);
    --xd-shadow-hover: 0 4px 12px rgba(23, 43, 99, .08), 0 16px 40px rgba(23, 43, 99, .09);
    --xd-vip: linear-gradient(135deg, #f6c96b 0%, #e9a23b 100%);
}

/* 基础 */
body.xd-body {
    background: var(--xd-bg);
    color: var(--xd-text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.xd-body a { color: var(--xd-primary); }
.xd-body a:hover { color: var(--xd-primary-dark); text-decoration: none; }

.xd-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 16px;
}

.xd-main { padding-top: 24px; padding-bottom: 40px; }

/* 顶部导航 */
.xd-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--xd-border);
}

.xd-header-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    height: 64px;
}

.xd-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 19px;
    font-weight: 700;
    color: var(--xd-text) !important;
    white-space: nowrap;
    flex: 0 0 auto;
}

.xd-logo-mark {
    width: 30px;
    height: 30px;
    border-radius: 9px;
    background: var(--xd-gradient);
    color: #fff;
    font-size: 15px;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(74, 108, 247, .3);
}

.xd-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 0 0 auto;
}

.xd-nav a {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 8px;
    color: var(--xd-text-weak) !important;
    font-size: 14px;
    transition: all .18s ease;
}

.xd-nav a:hover,
.xd-nav a.active {
    background: #eef2ff;
    color: var(--xd-primary) !important;
}

/* 搜索已独立成导航栏下方的一整条, 导航行不再被搜索框占位 */
.xd-search-strip {
    border-top: 1px solid var(--xd-border);
    background: #f8fafc;
    padding: 8px 0;
}

.xd-search-strip .xd-search-bar {
    height: 38px;
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    border-color: var(--xd-border);
}

.xd-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
    margin-left: auto;
}

/* 导航项多(8 个)时收窄内边距: 992-1159px 之间才不会撑出横向滚动条 */
@media (max-width: 1159px) {
    .xd-nav a { padding: 6px 8px; }
    .xd-header-actions .xd-btn { padding: 0 12px; }
}

/* 搜索框 */
.xd-search-bar {
    display: flex;
    align-items: center;
    background: #f1f4f9;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0 6px 0 16px;
    height: 40px;
    transition: all .2s ease;
}

.xd-search-bar:focus-within {
    background: #fff;
    border-color: var(--xd-primary);
    box-shadow: 0 0 0 4px rgba(74, 108, 247, .1);
}

.xd-search-bar input {
    flex: 1 1 auto;
    min-width: 0;
    border: 0;
    outline: 0;
    background: transparent;
    font-size: 14px;
    color: var(--xd-text);
    padding: 0;
}

.xd-search-bar button {
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 50%;
    background: var(--xd-gradient);
    color: #fff;
    font-size: 13px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 按钮 */
.xd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 38px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--xd-border);
    background: #fff;
    color: var(--xd-text-weak) !important;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s ease;
    white-space: nowrap;
}

.xd-btn:hover { border-color: #d5dcea; color: var(--xd-text) !important; }

.xd-btn-primary {
    background: var(--xd-gradient);
    border-color: transparent;
    color: #fff !important;
    box-shadow: 0 6px 16px rgba(74, 108, 247, .28);
}

.xd-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(74, 108, 247, .35);
    color: #fff !important;
}

.xd-btn-vip {
    background: var(--xd-vip);
    border-color: transparent;
    color: #6a3d00 !important;
    font-weight: 700;
    box-shadow: 0 6px 16px rgba(233, 162, 59, .3);
}

.xd-btn-lg { height: 46px; padding: 0 28px; font-size: 15px; }
.xd-btn-block { display: flex; width: 100%; }

/* 卡片 */
.xd-card {
    background: var(--xd-card);
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius);
    box-shadow: var(--xd-shadow);
    margin-bottom: 20px;
    overflow: hidden;
}

.xd-card-hover { transition: all .22s ease; }
.xd-card-hover:hover { transform: translateY(-2px); box-shadow: var(--xd-shadow-hover); }

.xd-card-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 0;
}

.xd-card-title {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--xd-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.xd-card-title::before {
    content: "";
    width: 4px;
    height: 16px;
    border-radius: 2px;
    background: var(--xd-gradient);
}

.xd-card-body { padding: 16px 20px 20px; }
.xd-card-more { font-size: 13px; color: var(--xd-text-mute) !important; }
.xd-plan-offer { font-size: 13px; font-weight: 700; color: #d93025; }

/* 首页 Hero */
.xd-hero {
    position: relative;
    border-radius: 22px;
    background: var(--xd-gradient);
    color: #fff;
    padding: 44px 28px 40px;
    text-align: center;
    margin-bottom: 24px;
    overflow: hidden;
    box-shadow: 0 12px 32px rgba(74, 108, 247, .22);
}

.xd-hero::after {
    content: "";
    position: absolute;
    right: -60px;
    top: -60px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .1);
}

.xd-hero-title {
    position: relative;
    margin: 0 0 8px;
    font-size: 30px;
    font-weight: 800;
    letter-spacing: .5px;
    color: #fff;
}

.xd-hero-sub {
    position: relative;
    margin: 0 0 24px;
    font-size: 14px;
    color: rgba(255, 255, 255, .85);
}

.xd-hero-search {
    position: relative;
    max-width: 560px;
    margin: 0 auto;
    display: flex;
    background: #fff;
    border-radius: 999px;
    padding: 6px 6px 6px 20px;
    box-shadow: 0 10px 26px rgba(20, 34, 90, .18);
}

.xd-hero-search input {
    flex: 1 1 auto;
    min-width: 0;
    border: 0;
    outline: 0;
    font-size: 16px;
    color: var(--xd-text);
    background: transparent;
    height: 44px;
}

.xd-hero-search button {
    flex: 0 0 auto;
    border: 0;
    height: 44px;
    padding: 0 26px;
    border-radius: 999px;
    background: var(--xd-gradient);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.xd-hero-tags {
    position: relative;
    margin-top: 18px;
    font-size: 13px;
    color: rgba(255, 255, 255, .8);
}

.xd-hero-tags a { color: #fff; margin: 0 8px; opacity: .9; }
.xd-hero-tags a:hover { opacity: 1; text-decoration: underline; }

/* 单词详情 */
.xd-word-head { padding: 24px 24px 18px; display: flex; gap: 24px; align-items: flex-start; }
.xd-word-info { flex: 1 1 auto; min-width: 0; }

/* 情景图(全景图): 沿用老模板的做法, 放在单词右侧用幻灯片切换 */
.xd-word-gallery {
    flex: 0 0 240px;
    width: 240px;
    border: 1px solid var(--xd-border);
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}

.xd-gallery-stage {
    height: 190px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8fafc;
}

.xd-gallery-stage img { display: block; max-width: 100%; max-height: 100%; }

.xd-gallery-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 32px;
    padding: 0 4px;
    border-top: 1px solid var(--xd-border);
    background: #f8f8f8;
    color: #666;
    font-size: 13px;
}

.xd-gallery-nav button {
    width: 34px;
    height: 30px;
    border: 0;
    background: transparent;
    color: #666;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
}

.xd-gallery-nav button:hover { color: var(--xd-primary); }
.xd-gallery-count b { color: var(--xd-primary); }

.xd-word-title {
    margin: 0 0 6px;
    font-size: 38px;
    font-weight: 800;
    letter-spacing: -.5px;
    color: var(--xd-text);
    word-break: break-word;
}

.xd-word-pron {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 18px;
    color: var(--xd-text-weak);
    font-size: 15px;
}

.xd-pron-item { display: inline-flex; align-items: center; gap: 6px; }
.xd-pron-tag {
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 5px;
    background: #eef2ff;
    color: var(--xd-primary);
    font-weight: 600;
}

.xd-audio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #eef2ff;
    color: var(--xd-primary);
    cursor: pointer;
    transition: all .18s ease;
    font-size: 13px;
}

.xd-audio:hover { background: var(--xd-primary); color: #fff; }

.xd-word-meaning { margin-top: 16px; font-size: 15.5px; color: #333a4a; }
.xd-word-meaning ul { padding-left: 18px; margin: 0; }
.xd-word-meaning li { margin-bottom: 6px; }
.xd-word-meaning li::marker { color: var(--xd-primary); }

/* 标签 */
.xd-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.xd-tags a {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: #f4f6fb;
    color: var(--xd-text-weak) !important;
    font-size: 13px;
    transition: all .18s ease;
}

.xd-tags a:hover { background: #eef2ff; color: var(--xd-primary) !important; }

.xd-label {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    margin: 0 6px 6px 0;
}

.xd-label-cet4 { background: #e8f0ff; color: #2f6bd8; }
.xd-label-cet6 { background: #e6f8ef; color: #1a9c5b; }
.xd-label-tem { background: #eef0ff; color: #5b5bd6; }
.xd-label-tem8 { background: #fff3e6; color: #c97a10; }
.xd-label-kaoyan { background: #fdeaf0; color: #c2306a; }
.xd-label-gre { background: #f0eaff; color: #6f3fd4; }
.xd-label-toefl { background: #e6f6fb; color: #0f8ba8; }
.xd-label-ielts { background: #eaf7ea; color: #3d8b3d; }
.xd-label-gaokao { background: #fff7e0; color: #a86b00; }
.xd-label-zhongkao { background: #f1f4f9; color: #4a5568; }

/* 星级 */
.xd-stars { color: #f5b301; font-size: 13px; letter-spacing: 1px; }
.xd-star-meta { font-size: 13px; color: var(--xd-text-mute); margin-right: 6px; }

/* 会员权益卡(锁定内容) */
.xd-lock {
    position: relative;
    border: 1px dashed #dfe5f0;
    border-radius: var(--xd-radius-sm);
    background: linear-gradient(180deg, #fbfcff 0%, #f6f8fd 100%);
    padding: 16px 18px;
}

.xd-lock-preview { color: var(--xd-text-weak); font-size: 14px; }

.xd-lock-fade {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 56px;
    background: linear-gradient(180deg, rgba(250, 251, 254, 0) 0%, #f7f9fd 90%);
    border-radius: 0 0 var(--xd-radius-sm) var(--xd-radius-sm);
    pointer-events: none;
}

.xd-lock-cta {
    position: relative;
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--xd-radius-sm);
    background: #fff7e8;
    border: 1px solid #ffe3b3;
}

.xd-lock-cta-text { font-size: 13.5px; color: #8a5b00; }
.xd-lock-cta-text strong { color: #b87600; }

/* 会员卡 */
.xd-vip-card {
    border-radius: var(--xd-radius);
    background: linear-gradient(135deg, #2b2f45 0%, #1d2033 100%);
    color: #f6e2b8;
    padding: 20px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.xd-vip-card::after {
    content: "";
    position: absolute;
    right: -40px;
    bottom: -50px;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background: var(--xd-vip);
    opacity: .25;
}

.xd-vip-card h4 {
    margin: 0 0 6px;
    font-size: 16px;
    font-weight: 700;
    color: #ffd98a;
}

.xd-vip-card p { margin: 0 0 14px; font-size: 13px; color: rgba(255, 255, 255, .62); }
/* 推广卡上的促销标签: 无活动时该节点不渲染 */
.xd-vip-card .xd-vip-promo { display: inline-block; margin: 0 0 10px; padding: 2px 9px; border-radius: 999px; background: rgba(255, 217, 138, .16); color: #ffd98a; font-size: 12px; font-weight: 700; line-height: 1.7; }
.xd-vip-card .xd-btn { position: relative; }

/* 套餐 */
.xd-plans { display: flex; flex-wrap: wrap; gap: 16px; }

.xd-plan {
    flex: 1 1 200px;
    position: relative;
    border: 1.5px solid var(--xd-border);
    border-radius: var(--xd-radius);
    background: #fff;
    padding: 22px 18px;
    text-align: center;
    transition: all .2s ease;
}

.xd-plan:hover { border-color: var(--xd-primary); box-shadow: var(--xd-shadow-hover); }
.xd-plan.is-hot { border-color: #f0b849; background: linear-gradient(180deg, #fffdf7 0%, #fff 60%); }

.xd-plan-badge {
    position: absolute;
    top: -11px;
    left: 50%;
    transform: translateX(-50%);
    padding: 2px 12px;
    border-radius: 999px;
    background: var(--xd-vip);
    color: #6a3d00;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}

.xd-plan-name { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.xd-plan-origin { font-size: 13px; color: #7c8699; line-height: 1.4; margin-bottom: 2px; }
.xd-plan-origin s { text-decoration: line-through; }
.xd-plan-price { font-size: 30px; font-weight: 800; color: var(--xd-text); line-height: 1.2; }
.xd-plan-price small { font-size: 14px; font-weight: 600; margin-right: 2px; }
.xd-plan-save { display: inline-block; margin: 8px 0 0; padding: 2px 9px; border-radius: 999px; background: #fff1f0; color: #d93025; font-size: 12px; font-weight: 700; line-height: 1.6; }
.xd-plan-unit { font-size: 12.5px; color: var(--xd-text-mute); margin: 6px 0 14px; }

/* 权益表 */
.xd-benefit-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.xd-benefit-table th,
.xd-benefit-table td {
    padding: 12px 14px;
    font-size: 14px;
    border-bottom: 1px solid var(--xd-border);
    text-align: left;
}

.xd-benefit-table th { font-weight: 600; color: var(--xd-text-weak); background: #fafbfe; }
.xd-benefit-table th:first-child { border-radius: 10px 0 0 0; }
.xd-benefit-table th:last-child { border-radius: 0 10px 0 0; text-align: center; }
.xd-benefit-table td:last-child { text-align: center; }
.xd-benefit-table tr:last-child td { border-bottom: 0; }
.xd-benefit-table .xd-col-vip { color: #b87600; font-weight: 700; background: #fffdf7; }

/* 单词网格 */
.xd-word-grid { display: flex; flex-wrap: wrap; gap: 16px; }

.xd-word-item {
    flex: 0 0 calc(25% - 12px);
    max-width: calc(25% - 12px);
    background: #fff;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius);
    box-shadow: var(--xd-shadow);
    overflow: hidden;
    transition: all .22s ease;
}

.xd-word-item:hover { transform: translateY(-3px); box-shadow: var(--xd-shadow-hover); }

.xd-word-thumb {
    display: block;
    height: 130px;
    background: #f1f4f9 center/cover no-repeat;
    position: relative;
}

.xd-word-thumb-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 130px;
    background: linear-gradient(135deg, #eef2ff 0%, #e6ebfd 100%);
    font-size: 30px;
    font-weight: 800;
    color: #b9c4e8;
    text-transform: uppercase;
}

.xd-word-item-body { padding: 14px 16px 16px; }

.xd-word-item-title {
    margin: 0 0 6px;
    font-size: 17px;
    font-weight: 700;
}

.xd-word-item-title a { color: var(--xd-text) !important; }
.xd-word-item-title a:hover { color: var(--xd-primary) !important; }

.xd-word-item-desc {
    margin: 0;
    font-size: 13px;
    color: var(--xd-text-weak);
    max-height: 62px;
    overflow: hidden;
    line-height: 1.6;
}

/* 页面标题 */
.xd-page-head { margin-bottom: 20px; }
.xd-page-title { margin: 0 0 6px; font-size: 24px; font-weight: 800; }
.xd-page-desc { margin: 0; font-size: 13.5px; color: var(--xd-text-mute); }

/* 筛选条 */
.xd-filter { padding: 14px 20px; border-bottom: 1px solid var(--xd-border); }
.xd-filter:last-child { border-bottom: 0; }

.xd-filter-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 8px; }

.xd-filter-label {
    flex: 0 0 auto;
    font-size: 13px;
    color: var(--xd-text-mute);
    min-width: 64px;
}

.xd-filter-row a {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    color: var(--xd-text-weak) !important;
    background: #f6f8fc;
    transition: all .16s ease;
}

.xd-filter-row a:hover { background: #eef2ff; color: var(--xd-primary) !important; }
.xd-filter-row a.ciku-current { background: var(--xd-gradient); color: #fff !important; box-shadow: 0 4px 10px rgba(74, 108, 247, .25); }

/* 分页 */
.xd-body .pagination { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin: 28px 0 8px; }
.xd-body .pagination > li > a,
.xd-body .pagination > li > span {
    border: 1px solid var(--xd-border);
    border-radius: 8px;
    color: var(--xd-text-weak);
    padding: 7px 13px;
    font-size: 14px;
}
.xd-body .pagination > .active > a,
.xd-body .pagination > .active > span {
    background: var(--xd-gradient);
    border-color: transparent;
    color: #fff;
}

/* 表单(登录/注册) */
.xd-auth { max-width: 420px; margin: 40px auto 60px; }
.xd-auth .xd-card { padding: 28px; }

.xd-form-group { margin-bottom: 18px; }

.xd-form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--xd-text-weak);
    margin-bottom: 7px;
}

.xd-form-control {
    display: block;
    width: 100%;
    height: 44px;
    padding: 0 14px;
    border: 1px solid #e2e7f2;
    border-radius: var(--xd-radius-sm);
    font-size: 14.5px;
    color: var(--xd-text);
    background: #fff;
    outline: 0;
    transition: all .18s ease;
}

.xd-form-control:focus {
    border-color: var(--xd-primary);
    box-shadow: 0 0 0 4px rgba(74, 108, 247, .1);
}

.xd-form-help { font-size: 12.5px; color: var(--xd-text-mute); margin-top: 6px; }
.xd-form-check { font-size: 13.5px; color: var(--xd-text-weak); }
.xd-form-check input { margin-right: 6px; vertical-align: -1px; }

.xd-auth-switch {
    text-align: center;
    font-size: 13.5px;
    color: var(--xd-text-mute);
    margin-top: 18px;
}

/* 会员中心 */
.xd-user-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
}

.xd-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #fff;
    box-shadow: 0 4px 14px rgba(23, 43, 99, .14);
    flex: 0 0 auto;
}

.xd-user-name { font-size: 19px; font-weight: 700; margin: 0 0 4px; }
.xd-user-meta { font-size: 13px; color: var(--xd-text-mute); margin: 0; }

/* 列表 */
.xd-list { list-style: none; margin: 0; padding: 0; }
.xd-list li { border-bottom: 1px solid var(--xd-border); }
.xd-list li:last-child { border-bottom: 0; }
.xd-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    color: var(--xd-text) !important;
    font-size: 14.5px;
}
.xd-list a:hover { background: #fafbff; }
.xd-list a .fa, .xd-list a .glyphicon { color: var(--xd-text-mute); margin-right: 10px; }
.xd-list a:hover .fa, .xd-list a:hover .glyphicon { color: var(--xd-primary); }

/* 页脚 */
.xd-footer {
    background: #fff;
    border-top: 1px solid var(--xd-border);
    padding: 24px 0 30px;
    margin-top: 20px;
}

.xd-footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    justify-content: center;
    font-size: 13px;
    margin-bottom: 12px;
}

.xd-footer-links a { color: var(--xd-text-mute) !important; }
.xd-footer-links a:hover { color: var(--xd-primary) !important; }

.xd-footer-copy {
    text-align: center;
    font-size: 12.5px;
    color: var(--xd-text-mute);
    margin: 0;
    line-height: 1.9;
}

.xd-footer-copy a { color: var(--xd-text-weak) !important; }

/* 站点说明页(隐私政策 / 用户协议 / 数据来源声明 / 版权投诉) */
.xd-doc-body {
    padding: 24px 30px 28px;
    font-size: 14.5px;
    line-height: 1.85;
    color: var(--xd-text);
}

/* 正文标题不沿用页面的 h1, 只在小节级别排版; 首个小节不留上间距 */
.xd-doc-body h2 {
    margin: 30px 0 10px;
    font-size: 18px;
    font-weight: 800;
    color: var(--xd-text);
}

.xd-doc-body h2:first-of-type { margin-top: 6px; }

.xd-doc-body h3 {
    margin: 20px 0 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--xd-text);
}

.xd-doc-body p { margin: 0 0 10px; }

.xd-doc-body ul,
.xd-doc-body ol { margin: 0 0 14px; padding-left: 22px; }

.xd-doc-body li { margin-bottom: 6px; }

.xd-doc-body strong { font-weight: 700; }

.xd-doc-updated {
    margin: 0 0 4px;
    font-size: 12.5px;
    color: var(--xd-text-mute);
}

/* 提示块: 每页末尾的一句话总结 */
.xd-doc-note {
    margin: 24px 0 0;
    padding: 12px 16px;
    border-radius: var(--xd-radius-sm);
    border: 1px solid var(--xd-border);
    background: #f7f9fd;
    font-size: 13.5px;
    color: var(--xd-text-weak);
}

/* 表格容器: 窄屏横向滚动, 不撑破卡片 */
.xd-doc-table {
    margin: 0 0 14px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.xd-doc-table table {
    width: 100%;
    min-width: 560px;
    border-collapse: collapse;
    font-size: 13.5px;
}

.xd-doc-table th,
.xd-doc-table td {
    padding: 9px 12px;
    border: 1px solid var(--xd-border);
    text-align: left;
    vertical-align: top;
    line-height: 1.75;
}

.xd-doc-table th {
    background: #f8fafc;
    font-weight: 700;
    white-space: nowrap;
}

/* 页面底部的四页切换入口 */
.xd-doc-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 4px;
}

/* 正文里的按钮(如版权投诉页的「打开站内投诉表单」) */
.xd-doc-actions { margin: 0 0 12px; }

/* 移动端 */
.xd-mobile-toggle {
    display: none;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--xd-border);
    background: #fff;
    color: var(--xd-text-weak);
    font-size: 16px;
    cursor: pointer;
    flex: 0 0 auto;
}

.xd-mobile-panel {
    display: none;
    padding: 12px 16px 14px;
    border-top: 1px solid var(--xd-border);
    background: #fff;
}

.xd-mobile-panel.is-open { display: block; }
.xd-mobile-panel .xd-nav { flex-wrap: wrap; }
.xd-mobile-panel .xd-nav a { padding: 8px 12px; }

@media (max-width: 991px) {
    .xd-header-inner { gap: 10px; height: 58px; }
    .xd-header-actions { gap: 8px; margin-left: 0; }
    .xd-header-actions .xd-btn { padding: 6px 12px; font-size: 13px; }
    /* 手机端未登录只留“登录”, 注册入口在右上角菜单面板里 */
    .xd-header-actions .xd-btn-register { display: none; }
    .xd-header-inner .xd-nav { display: none; }
    /* 手机端搜索带同样贴在导航下方, 输入框抬到 40px 好点 */
    .xd-search-strip { padding: 6px 0; }
    .xd-search-strip .xd-search-bar { height: 40px; }
    .xd-mobile-toggle { display: inline-flex; align-items: center; justify-content: center; margin-left: auto; }
    .xd-word-item { flex: 0 0 calc(50% - 8px); max-width: calc(50% - 8px); }
}

@media (max-width: 767px) {
    body.xd-body { font-size: 14.5px; }
    .xd-hero { padding: 32px 18px 28px; border-radius: 18px; }
    .xd-hero-title { font-size: 23px; }
    .xd-hero-search { padding: 5px 5px 5px 16px; }
    .xd-hero-search input { font-size: 15px; height: 40px; }
    .xd-hero-search button { height: 40px; padding: 0 18px; font-size: 14px; }
    .xd-word-title { font-size: 30px; }
    .xd-word-head { padding: 20px 18px 14px; flex-direction: column; }
    .xd-word-gallery { flex: 0 0 auto; width: 100%; }
    .xd-gallery-stage { height: 210px; }
    .xd-card-head, .xd-card-body { padding-left: 16px; padding-right: 16px; }
    .xd-word-item { flex: 0 0 calc(50% - 8px); max-width: calc(50% - 8px); }
    .xd-word-thumb, .xd-word-thumb-empty { height: 96px; }
    .xd-word-thumb-empty { font-size: 24px; }
    .xd-word-item-title { font-size: 15px; }
    .xd-plans { gap: 12px; }
    .xd-plan { flex: 1 1 100%; }
    .xd-lock-cta { flex-direction: column; align-items: flex-start; }
    .xd-filter { padding: 12px 16px; }
    .xd-benefit-table th, .xd-benefit-table td { padding: 10px 8px; font-size: 13px; }
    .xd-auth { margin: 20px auto 40px; }
    .xd-auth .xd-card { padding: 20px; }
}

/* 词库列表（三列网格）：同一行卡片等高，避免高低不齐产生留白 */
.xd-word-grid-3 > .xd-word-item {
    display: flex;
    flex-direction: column;
}

.xd-word-grid-3 > .xd-word-item .xd-word-item-body { flex: 1 1 auto; }

.xd-word-grid-3 > .xd-word-item .xd-word-item-desc {
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
    min-height: 4.8em;
    overflow: hidden;
}

@media (min-width: 768px) {
    .xd-word-grid-3 > .xd-word-item {
        flex: 0 0 calc(33.3333% - 11px);
        max-width: calc(33.3333% - 11px);
    }
}

/* 词组列表页: 词组没有配图, 省掉 130px 的缩略图区, 首字母收成标题前的小徽标 */
.xd-phrase-item .xd-word-item-body { padding: 16px 18px 18px; }

.xd-phrase-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    margin-right: 6px;
    border-radius: 7px;
    background: linear-gradient(135deg, #eef2ff 0%, #e6ebfd 100%);
    color: #7b8bc7;
    font-size: 13px;
    font-weight: 800;
    vertical-align: -2px;
}

/* 卡密兑换 */
.xd-redeem-row { display: flex; flex-wrap: wrap; gap: 10px; }

.xd-redeem-input {
    flex: 1 1 240px;
    min-width: 0;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #fff;
    color: var(--xd-text);
    font-size: 15px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.xd-redeem-input:focus { outline: none; border-color: var(--xd-primary); }
.xd-redeem-row .xd-btn { flex: 0 0 auto; height: 40px; }

#xd-redeem-msg { margin-top: 10px; line-height: 1.7; }

@media (max-width: 767px) {
    .xd-redeem-row .xd-btn { width: 100%; }
    /* 说明页正文: 窄屏收窄内边距, 表格给最小宽度让它横向滚动 */
    .xd-doc-body { padding: 18px 16px 20px; font-size: 14px; }
    .xd-doc-body h2 { margin: 24px 0 8px; font-size: 16.5px; }
    .xd-doc-body h3 { font-size: 14.5px; }
    .xd-doc-table table { font-size: 13px; min-width: 480px; }
    .xd-doc-table th, .xd-doc-table td { padding: 8px 10px; }
    .xd-doc-nav .xd-btn { flex: 1 1 calc(50% - 5px); padding: 0 10px; }
}

/* 生词本 */
.xd-word-tools {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 14px;
}

.xd-fav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 38px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--xd-border);
    background: #fff;
    color: var(--xd-text-weak);
    font-size: 14px;
    cursor: pointer;
    transition: all .2s ease;
}

.xd-fav-btn .glyphicon { color: #f0a92e; }
.xd-fav-btn:hover { border-color: #f0a92e; color: #b87600; }

.xd-fav-btn.is-active {
    background: #fff8e8;
    border-color: #f0a92e;
    color: #b87600;
}

.xd-fav-link { font-size: 13px; color: var(--xd-text-mute) !important; }
.xd-fav-link:hover { color: var(--xd-primary) !important; }

.xd-fav-tip {
    font-size: 13px;
    color: var(--xd-text-mute);
    background: #f7f9fd;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    padding: 10px 14px;
    line-height: 1.8;
}

.xd-fav-tip.is-ok { background: #f0fbf4; border-color: #cfeadd; color: #1a9c5b; }
.xd-fav-tip-sep { margin: 0 6px; color: #c3cad6; }

.xd-fav-import {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
    padding: 12px 14px;
    border-radius: var(--xd-radius-sm);
    background: #fff8e8;
    border: 1px solid #f6e0b4;
    font-size: 13.5px;
    color: #8a5c00;
}

.xd-fav-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 14px 0 6px;
}

.xd-fav-search {
    flex: 1 1 auto;
    min-width: 0;
    height: 38px;
    padding: 0 14px;
    border: 1px solid var(--xd-border);
    border-radius: 999px;
    font-size: 14px;
    color: var(--xd-text);
    outline: none;
}

.xd-fav-search:focus { border-color: var(--xd-primary); }

.xd-fav-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 0;
    border-bottom: 1px solid var(--xd-border);
}

.xd-fav-item:last-child { border-bottom: 0; }
.xd-fav-item-main { flex: 1 1 auto; min-width: 0; }

.xd-fav-word {
    font-size: 17px;
    font-weight: 600;
    color: var(--xd-text) !important;
}

.xd-fav-word:hover { color: var(--xd-primary) !important; }

.xd-fav-pron {
    margin-left: 8px;
    font-size: 12.5px;
    color: var(--xd-text-mute);
}

.xd-fav-meaning {
    margin: 4px 0 0;
    font-size: 13.5px;
    color: var(--xd-text-weak);
    line-height: 1.7;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.xd-fav-del {
    flex: 0 0 auto;
    height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid var(--xd-border);
    background: #fff;
    color: var(--xd-text-mute);
    font-size: 12.5px;
    cursor: pointer;
}

.xd-fav-del:hover { border-color: #e54d42; color: #e54d42; }

.xd-fav-empty {
    padding: 34px 10px;
    text-align: center;
    color: var(--xd-text-mute);
    font-size: 14px;
}

.xd-fav-empty p { margin: 0 0 8px; }
.xd-fav-empty .xd-btn { margin-top: 10px; }

.xd-list a.is-active { background: #eef2ff; }
.xd-list a.is-active .glyphicon { color: var(--xd-primary); }

@media (max-width: 991px) {
    .xd-header-actions .xd-btn-fav { display: none; }
}

@media (max-width: 767px) {
    .xd-fav-toolbar { flex-wrap: wrap; }
    .xd-fav-search { flex: 1 1 100%; }
    .xd-fav-item { padding: 12px 0; }
    /* 手机上收藏按钮与两个快捷链接并成一行, 不再每个各占一行 */
    .xd-word-tools { gap: 8px; margin-top: 12px; }
    .xd-word-tools .xd-fav-btn { flex: 0 0 auto; width: auto; height: 34px; padding: 0 10px; font-size: 12.5px; }
    .xd-word-tools .xd-fav-link { width: auto; font-size: 12.5px; line-height: 34px; white-space: nowrap; }
    .xd-word-tools .xd-fav-link + .xd-fav-link { position: relative; padding-left: 10px; }
    .xd-word-tools .xd-fav-link + .xd-fav-link::before {
        content: "";
        position: absolute;
        left: 0;
        top: 50%;
        width: 1px;
        height: 12px;
        margin-top: -6px;
        background: #d8dee9;
    }
}

/* 学习计划 / 复习队列 / 学习周报 */
.xd-study-hero {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 18px;
}

.xd-study-hero-item {
    flex: 1 1 200px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 16px 18px;
    background: var(--xd-card);
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius);
    box-shadow: var(--xd-shadow);
}

.xd-study-hero-label { font-size: 12.5px; color: var(--xd-text-mute); }
.xd-study-hero-item strong { font-size: 22px; line-height: 1.3; color: var(--xd-text); }
.xd-study-hero-sub { font-size: 12.5px; color: var(--xd-text-weak); }

.xd-study-bar {
    height: 6px;
    margin-bottom: 22px;
    background: #eef2f9;
    border-radius: 999px;
    overflow: hidden;
}

.xd-study-bar i {
    display: block;
    height: 100%;
    background: var(--xd-gradient);
    border-radius: 999px;
    transition: width .3s ease;
}

.xd-study-card { min-height: 180px; padding: 8px 6px 4px; text-align: center; }
.xd-study-card-empty { padding: 30px 0; color: var(--xd-text-mute); text-align: center; }

.xd-study-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 10px;
}

.xd-study-meta .xd-label.is-new { background: #e8f0ff; color: #2f6bd8; }
.xd-study-meta .xd-label.is-review { background: #f3f0ff; color: #6f3fd4; }
.xd-study-stage { font-size: 12.5px; color: var(--xd-text-mute); }

.xd-study-word {
    margin: 4px 0 8px;
    font-size: 34px;
    font-weight: 700;
    letter-spacing: .5px;
    word-break: break-word;
    color: var(--xd-text);
}

.xd-study-pron {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    font-size: 13.5px;
    color: var(--xd-text-weak);
}

.xd-study-pron-item b { margin-right: 4px; font-weight: 600; color: var(--xd-text-mute); }
.xd-study-pron-item .xd-audio { margin-left: 4px; cursor: pointer; color: var(--xd-primary); }

.xd-study-meaning {
    max-width: 620px;
    margin: 18px auto 0;
    padding: 14px 18px;
    background: #f7f9fd;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    font-size: 14.5px;
    line-height: 1.9;
    color: #333a4a;
    text-align: left;
}

.xd-study-actions { margin-top: 20px; }

.xd-study-judge {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

.xd-btn-know { background: #e8f7ef; border-color: #bfe7d2; color: #1a9c5b !important; }
.xd-btn-fuzzy { background: #fff7e8; border-color: #f5dfb4; color: #b87600 !important; }
.xd-btn-forget { background: #fdeeee; border-color: #f3cccc; color: #d94343 !important; }
.xd-study-tip { margin-top: 14px; font-size: 12.5px; color: var(--xd-text-mute); }

.xd-study-done { padding: 8px 6px 4px; text-align: center; }
.xd-study-done-title { margin: 0 0 8px; font-size: 19px; font-weight: 700; }
.xd-study-done-text { margin-bottom: 16px; color: var(--xd-text-weak); }
.xd-study-done-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; }

.xd-study-intro { margin: 0 0 18px; padding: 0; list-style: none; }
.xd-study-intro li { display: flex; gap: 10px; padding: 10px 0; border-bottom: 1px dashed var(--xd-border); color: #333a4a; font-size: 14px; }
.xd-study-intro li:last-child { border-bottom: 0; }
.xd-study-intro .glyphicon { margin-top: 4px; color: var(--xd-primary); }

.xd-study-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: #f7f9fd;
    border-radius: var(--xd-radius-sm);
}

.xd-study-cta-text { flex: 1 1 240px; font-size: 13.5px; color: var(--xd-text-weak); }

.xd-form-row { margin-bottom: 20px; }
.xd-form-label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; }

.xd-form-input {
    width: 100%;
    max-width: 320px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #fff;
    font-size: 14px;
    color: var(--xd-text);
    outline: none;
}

.xd-form-input:focus { border-color: var(--xd-primary); }
.xd-form-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }

.xd-report-table th,
.xd-report-table td { vertical-align: middle; }
.xd-report-week { font-size: 12.5px; color: var(--xd-text-mute); }

.xd-report-bar {
    display: block;
    height: 8px;
    background: #eef2f9;
    border-radius: 999px;
    overflow: hidden;
}

.xd-report-bar i {
    display: block;
    height: 100%;
    background: var(--xd-gradient);
    border-radius: 999px;
}

.xd-report-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 6px;
    border-radius: 50%;
    background: #dfe4ee;
    vertical-align: middle;
}

.xd-report-dot.is-on { background: #1a9c5b; }

@media (max-width: 767px) {
    .xd-study-hero-item { flex: 1 1 46%; }
    .xd-study-word { font-size: 28px; }
    .xd-form-input { max-width: 100%; }
}

/* 单词测验 */
.xd-quiz-quota {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: #eef2ff;
    border: 1px solid #d8e1ff;
    border-radius: var(--xd-radius-sm);
    font-size: 13.5px;
    color: #3a4664;
}

.xd-quiz-quota .glyphicon { color: var(--xd-primary); }
.xd-quiz-quota b { color: var(--xd-primary-dark); }

.xd-quiz-quota.is-vip {
    background: #fff8e9;
    border-color: #f2e0bb;
    color: #8a6413;
}

.xd-quiz-quota.is-vip .glyphicon { color: #d99b21; }

.xd-quiz-quota.is-empty { background: #fdeeee; border-color: #f3cccc; color: #a5443f; }
.xd-quiz-quota.is-empty .glyphicon { color: #d94343; }

.xd-quiz-nums { display: flex; flex-wrap: wrap; gap: 10px; }

.xd-quiz-num { margin: 0; font-weight: 400; cursor: pointer; }

.xd-quiz-num input { position: absolute; opacity: 0; pointer-events: none; }

.xd-quiz-num span {
    display: block;
    min-width: 74px;
    padding: 8px 16px;
    border: 1px solid var(--xd-border);
    border-radius: 999px;
    background: #fff;
    font-size: 14px;
    color: var(--xd-text-weak);
    text-align: center;
}

.xd-quiz-num input:checked + span {
    border-color: var(--xd-primary);
    background: #eef2ff;
    color: var(--xd-primary-dark);
    font-weight: 600;
}

.xd-quiz-body { min-height: 150px; padding: 8px 0 4px; text-align: center; }

.xd-quiz-tip { margin: 10px 0 16px; font-size: 13.5px; color: var(--xd-text-mute); }

.xd-quiz-prompt {
    margin: 4px 0 14px;
    padding: 14px 18px;
    background: #f7f9fd;
    border-radius: var(--xd-radius-sm);
    font-size: 16px;
    line-height: 1.85;
    color: #333a4a;
    text-align: left;
}

.xd-quiz-options {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 720px;
    margin: 0 auto;
    text-align: left;
}

.xd-quiz-option {
    flex: 1 1 46%;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 13px 16px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #fff;
    font-size: 14.5px;
    line-height: 1.7;
    color: #333a4a;
    text-align: left;
    cursor: pointer;
    transition: border-color .2s ease, background .2s ease;
}

.xd-quiz-option i {
    flex: 0 0 auto;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #f1f4fb;
    font-size: 12.5px;
    font-style: normal;
    font-weight: 600;
    line-height: 22px;
    text-align: center;
    color: var(--xd-text-mute);
}

.xd-quiz-option:hover { border-color: #c3d0f5; background: #fafbff; }

.xd-quiz-option.is-picked {
    border-color: var(--xd-primary);
    background: #eef2ff;
    color: var(--xd-primary-dark);
}

.xd-quiz-option.is-picked i { background: var(--xd-primary); color: #fff; }

.xd-quiz-spell { margin: 16px auto 0; max-width: 420px; }

.xd-quiz-input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #fff;
    font-size: 18px;
    letter-spacing: 1px;
    text-align: center;
    color: var(--xd-text);
    outline: none;
}

.xd-quiz-input:focus { border-color: var(--xd-primary); }

.xd-quiz-audio { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 18px; }

.xd-quiz-audio-btn { margin-left: 4px; color: var(--xd-primary); cursor: pointer; }

.xd-quiz-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 22px;
}

.xd-quiz-wrong {
    margin-bottom: 12px;
    padding: 14px 16px;
    background: #fdf7f7;
    border: 1px solid #f3dcdc;
    border-radius: var(--xd-radius-sm);
}

.xd-quiz-wrong-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.xd-quiz-wrong-word { font-size: 18px; font-weight: 700; color: var(--xd-text) !important; }
.xd-quiz-wrong-pron { font-size: 12.5px; color: var(--xd-text-mute); }
.xd-quiz-wrong-line { margin: 0; font-size: 14px; line-height: 1.85; color: #333a4a; }
.xd-quiz-wrong-line b { color: var(--xd-text-weak); font-weight: 600; }
.xd-quiz-wrong-empty { color: #b3bbc9; }
.xd-quiz-wrong-explain { margin: 6px 0 0; padding-top: 6px; border-top: 1px dashed #f0d9d9; font-size: 13.5px; line-height: 1.85; color: var(--xd-text-weak); }

.xd-quiz-allright {
    padding: 22px 10px;
    border: 1px dashed #bfe7d2;
    border-radius: var(--xd-radius-sm);
    background: #f3fbf6;
    color: #1a9c5b;
    font-size: 15px;
    text-align: center;
}

.xd-quiz-vip-tip {
    margin-top: 12px;
    padding: 12px 16px;
    background: #fff8e9;
    border-radius: var(--xd-radius-sm);
    font-size: 13.5px;
    color: #8a6413;
}

/* 词表导出 */
.xd-export-scopes { display: flex; flex-wrap: wrap; gap: 12px; }

.xd-export-scope { margin: 0; font-weight: 400; cursor: pointer; flex: 1 1 240px; }

.xd-export-scope input { position: absolute; opacity: 0; pointer-events: none; }

.xd-export-scope span {
    display: block;
    height: 100%;
    padding: 13px 16px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #fff;
}

.xd-export-scope b { display: block; font-size: 14.5px; color: var(--xd-text); }
.xd-export-scope em { display: block; margin-top: 4px; font-size: 12.5px; font-style: normal; color: var(--xd-text-mute); }

.xd-export-scope input:checked + span {
    border-color: var(--xd-primary);
    background: #f7f9ff;
    box-shadow: 0 0 0 3px rgba(74, 108, 247, .08);
}

.xd-export-scope input:checked + span b { color: var(--xd-primary-dark); }

@media (max-width: 767px) {
    .xd-quiz-option { flex: 1 1 100%; }
    .xd-quiz-num span { min-width: 62px; padding: 7px 12px; font-size: 13.5px; }
    .xd-export-scope { flex: 1 1 100%; }
}

/* 轻提示 */
.xd-toast {
    position: fixed;
    left: 50%;
    bottom: 40px;
    transform: translateX(-50%);
    z-index: 9999;
    max-width: 80%;
    padding: 11px 20px;
    border-radius: 999px;
    background: rgba(24, 32, 48, .92);
    color: #fff;
    font-size: 13.5px;
    line-height: 1.6;
    box-shadow: 0 8px 24px rgba(20, 30, 50, .18);
    opacity: 1;
    transition: opacity .35s ease, transform .35s ease;
}

.xd-toast.is-hide {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
}

/* 问题反馈弹窗 */
.xd-fb-mask {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 10000;
    background: rgba(18, 26, 40, .45);
}

.xd-fb-mask.is-open {
    display: flex;
    align-items: center;
    justify-content: center;
}

.xd-fb-card {
    width: 440px;
    max-width: calc(100% - 32px);
    max-height: 88vh;
    overflow-y: auto;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 18px 48px rgba(16, 24, 40, .22);
}

.xd-fb-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px 8px;
}

.xd-fb-head strong { font-size: 16px; color: var(--xd-text); }

.xd-fb-close {
    padding: 0 2px;
    border: 0;
    background: none;
    color: var(--xd-text-mute);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
}

.xd-fb-close:hover { color: var(--xd-text); }

.xd-fb-body { padding: 0 18px 18px; }

.xd-fb-sub {
    margin: 0 0 12px;
    color: var(--xd-text-mute);
    font-size: 13px;
    line-height: 1.7;
}

.xd-fb-label {
    display: block;
    margin: 12px 0 6px;
    color: var(--xd-text-weak);
    font-size: 13px;
}

.xd-fb-input {
    box-sizing: border-box;
    width: 100%;
    padding: 9px 11px;
    border: 1px solid var(--xd-border);
    border-radius: 8px;
    background: #fff;
    color: var(--xd-text);
    font-size: 14px;
    outline: none;
}

.xd-fb-input:focus {
    border-color: var(--xd-primary);
    box-shadow: 0 0 0 3px rgba(74, 108, 247, .12);
}

.xd-fb-textarea {
    min-height: 96px;
    line-height: 1.7;
    resize: vertical;
}

.xd-fb-counter {
    margin-top: 4px;
    color: var(--xd-text-mute);
    font-size: 12px;
    text-align: right;
}

/* 蜜罐: 正常用户看不到, 脚本会填 */
.xd-fb-hp {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    opacity: 0;
}

.xd-fb-tip {
    margin: 10px 0 0;
    color: var(--xd-text-mute);
    font-size: 12px;
    line-height: 1.7;
}

.xd-fb-body .xd-btn { margin-top: 14px; }

@media (max-width: 767px) {
    .xd-fb-card { max-width: none; border-radius: 12px; }
}

/* AI 记忆法卡片 */
.xd-skill-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.xd-skill-card {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    background: #f8fafd;
}

.xd-skill-no {
    flex: 0 0 20px;
    height: 20px;
    margin-top: 3px;
    border-radius: 50%;
    background: var(--xd-gradient);
    color: #fff;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
}

.xd-skill-text {
    color: #333a4a;
    font-size: 14px;
    line-height: 1.85;
    word-break: break-word;
}

/* 词族(词形变化 + 派生词) */
.xd-family-group { margin-bottom: 16px; }

.xd-family-group:last-child { margin-bottom: 0; }

.xd-family-label {
    margin-bottom: 8px;
    color: var(--xd-text-weak);
    font-size: 13px;
}

.xd-family-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.xd-family-item {
    display: inline-flex;
    align-items: baseline;
    padding: 5px 12px;
    border: 1px solid var(--xd-border);
    border-radius: 8px;
    background: #f8fafd;
    color: var(--xd-text) !important;
    font-size: 14px;
    transition: all .18s ease;
}

.xd-family-item em {
    margin-left: 6px;
    color: var(--xd-text-mute);
    font-size: 12px;
    font-style: normal;
}

.xd-family-item:hover {
    border-color: #c3d3fb;
    background: #eef2ff;
    color: var(--xd-primary) !important;
}

/* 记忆法卡片: 词根/联想徽标 + 底部「这条不准」 */
.xd-skill-kind {
    display: inline-block;
    margin-right: 6px;
    padding: 1px 7px;
    border-radius: 4px;
    font-size: 12px;
    line-height: 18px;
    vertical-align: 1px;
}

.xd-skill-kind-root {
    background: #e8f0fe;
    color: #1a56b8;
}

.xd-skill-kind-link {
    background: #fff3e0;
    color: #a35a00;
}

.xd-skill-card-root { border-color: #cfe0fb; }

.xd-skill-card-link {
    border-color: #f0e2c8;
    background: #fffdf7;
}

.xd-skill-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px dashed var(--xd-border);
}

.xd-skill-foot-tip {
    color: var(--xd-text-mute);
    font-size: 13px;
}

.xd-skill-report {
    flex: 0 0 auto;
    padding: 6px 14px;
    border: 1px solid var(--xd-border);
    border-radius: 8px;
    background: #fff;
    color: var(--xd-text-weak);
    font-size: 13px;
    cursor: pointer;
    transition: all .18s ease;
}

.xd-skill-report:hover:not(:disabled) {
    border-color: #f0b4a8;
    background: #fff5f3;
    color: #c0392b;
}

.xd-skill-report.is-done {
    border-color: var(--xd-border);
    background: #f5f6f8;
    color: var(--xd-text-mute);
    cursor: default;
}

/* 释义里的原形词链接: 「v. 吃（eat的过去式）」→ eat 可点 */
.xd-base-link {
    color: var(--xd-primary);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px dashed rgba(74, 108, 247, .45);
}

.xd-base-link:hover,
.xd-base-link:focus {
    color: var(--xd-primary-dark);
    border-bottom-style: solid;
    border-bottom-color: var(--xd-primary-dark);
}

@media (max-width: 767px) {
    .xd-skill-cards { grid-template-columns: minmax(0, 1fr); }
    .xd-skill-foot { flex-direction: column; align-items: flex-start; }
}

/* ---------------- 拍照识词 ---------------- */
.xd-ocr-quota {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 12px 16px;
    background: #eef2ff;
    border: 1px solid #d8e1ff;
    border-radius: var(--xd-radius-sm);
    font-size: 13.5px;
    color: #3a4664;
}

.xd-ocr-quota .glyphicon { color: var(--xd-primary); }
.xd-ocr-quota b { color: var(--xd-primary-dark); }

.xd-ocr-quota.is-vip {
    background: #fff8e9;
    border-color: #f2e0bb;
    color: #8a6413;
}

.xd-ocr-quota.is-vip .glyphicon { color: #d99b21; }

.xd-ocr-quota.is-empty {
    background: #fdf2f2;
    border-color: #f6d9d9;
    color: #9b4a4a;
}

.xd-ocr-quota.is-empty .glyphicon { color: #d4696a; }

.xd-ocr-file {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    overflow: hidden;
}

.xd-ocr-picker { position: relative; }

.xd-ocr-drop {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 190px;
    padding: 20px;
    background: #f8faff;
    border: 2px dashed #cfd9ee;
    border-radius: var(--xd-radius-sm);
    text-align: center;
    cursor: pointer;
    transition: border-color .2s ease, background .2s ease;
}

.xd-ocr-drop:hover,
.xd-ocr-drop.is-hover {
    border-color: var(--xd-primary);
    background: #f2f5ff;
}

.xd-ocr-drop .glyphicon {
    font-size: 34px;
    color: var(--xd-primary);
}

.xd-ocr-drop-main {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--xd-text);
}

.xd-ocr-drop-tip {
    margin: 0;
    font-size: 12.5px;
    color: var(--xd-text-mute);
}

.xd-ocr-preview { text-align: center; }

/* 包裹层只包住图片本身: 图片按比例缩放后, 上面的框才能贴准 */
.xd-ocr-frame {
    position: relative;
    display: inline-block;
    max-width: 100%;
    line-height: 0;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    overflow: hidden;
}

.xd-ocr-preview img {
    display: block;
    max-width: 100%;
    /* 竖拍的一页书: 高度卡在 420 时整个框只有 300 多像素宽, 框里套字根本看不清 */
    max-height: min(64vh, 620px);
}

/* 手机上图小, 得放大才能核对框; 缩放入口做成图片下面的两个按钮,
   因为整页框密密麻麻, 直接点图片想放大十有八九点到框上 */
.xd-ocr-zoom-bar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 10px 0 0;
}

.xd-ocr-zoom-bar .xd-ocr-zoom-btn {
    height: 34px;
    padding: 0 18px;
    font-size: 13px;
}

.xd-ocr-zoom-mask {
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, .9);
    z-index: 1900;
}

/* 放大后图片盖住了下面的「缩小」按钮, 给一句退出提示, 不拦点击 */
.xd-ocr-zoom-hint {
    display: none;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 14px;
    margin: 0;
    z-index: 1902;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, .75);
    pointer-events: none;
}

.xd-ocr-frame.is-zoom {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    max-width: 96vw;
    max-height: 92vh;
    z-index: 1901;
    border-color: transparent;
    cursor: zoom-out;
}

.xd-ocr-frame.is-zoom img {
    max-width: 96vw;
    max-height: 92vh;
}

.xd-ocr-frame:not(.is-zoom) { cursor: default; }

/* 识别框画在图片上层, 不挡点击 */
.xd-ocr-marks {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.xd-ocr-mark {
    pointer-events: auto;
    cursor: pointer;
    stroke-width: 1.5;
    stroke-linejoin: round;
    /* 图片被缩小到手机屏时, 线宽也跟着缩就看不见了 */
    vector-effect: non-scaling-stroke;
}

.xd-ocr-mark.is-hit { stroke: rgba(47, 163, 107, .9); fill: rgba(47, 163, 107, .1); }
.xd-ocr-mark.is-new { stroke: rgba(230, 140, 20, .95); fill: rgba(230, 140, 20, .12); }
.xd-ocr-mark.is-noise { stroke: rgba(217, 83, 79, .95); fill: rgba(217, 83, 79, .1); stroke-dasharray: 5 3; }
.xd-ocr-mark.is-skip { stroke: rgba(110, 110, 110, .75); fill: none; stroke-dasharray: 2 3; }

/* 被用户取消勾选的词淡下去, 一眼能看出哪些不上 */
.xd-ocr-mark.is-off { opacity: .35; }
.xd-ocr-mark.is-flash { fill: rgba(255, 200, 0, .5); }

/* 图上就地改字: 点框后在框旁边弹个输入框, 不用从图滚到下面的列表来回跑 */
.xd-ocr-edit {
    display: none;
    position: absolute;
    z-index: 6;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border: 1px solid var(--xd-border);
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 8px 24px rgba(15, 23, 42, .18);
    /* 容器上写了 line-height: 0, 这里得还原, 不然按钮文字会挤成一条 */
    line-height: 1.4;
    /* 默认弹在框的上方, 横竖都以框中心对齐 */
    transform: translate(-50%, -100%);
}

.xd-ocr-edit.is-open { display: flex; }

/* 框贴着图片顶端、上面放不下时翻到框下面 */
.xd-ocr-edit.is-below { transform: translate(-50%, 0); }

.xd-ocr-edit input {
    /* 窄屏下让输入框先被挤, 别把两个按钮压成一条竖字 */
    flex: 1 1 auto;
    min-width: 0;
    width: 8em;
    height: 30px;
    padding: 0 8px;
    border: 1px solid var(--xd-primary);
    border-radius: 6px;
    background: #fff;
    font-size: 15px;
    font-weight: 700;
    color: #1f2937;
}

.xd-ocr-edit-ok,
.xd-ocr-edit-cancel {
    flex: 0 0 auto;
    white-space: nowrap;
    height: 30px;
    padding: 0 10px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
}

.xd-ocr-edit-ok {
    border: 1px solid var(--xd-primary);
    background: var(--xd-primary);
    color: #fff;
}

.xd-ocr-edit-cancel {
    border: 1px solid var(--xd-border);
    background: #fff;
    color: var(--xd-text-muted);
}

@media (max-width: 767px) {
    .xd-ocr-edit input { width: 6.5em; font-size: 14px; }
    .xd-ocr-edit-ok, .xd-ocr-edit-cancel { padding: 0 8px; font-size: 11.5px; }
}

.xd-ocr-legend {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 6px 14px;
    margin-top: 10px;
    font-size: 12px;
    color: var(--xd-text-muted);
}

.xd-ocr-legend span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.xd-ocr-legend i {
    width: 14px;
    height: 10px;
    border: 1.5px solid;
    border-radius: 2px;
}

.xd-ocr-legend i.is-hit { border-color: rgba(47, 163, 107, .9); background: rgba(47, 163, 107, .14); }
.xd-ocr-legend i.is-new { border-color: rgba(230, 140, 20, .95); background: rgba(230, 140, 20, .16); }
.xd-ocr-legend i.is-noise { border-color: rgba(217, 83, 79, .95); background: rgba(217, 83, 79, .12); border-style: dashed; }
.xd-ocr-legend i.is-skip { border-color: rgba(120, 120, 120, .5); background: none; border-style: dotted; }

.xd-ocr-legend em {
    font-style: normal;
    opacity: .75;
}

.xd-ocr-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 14px;
}

.xd-ocr-actions .xd-btn { min-width: 110px; }

.xd-ocr-progress {
    height: 6px;
    margin-top: 12px;
    background: #eef1f7;
    border-radius: 99px;
    overflow: hidden;
}

.xd-ocr-progress i {
    display: block;
    width: 0;
    height: 100%;
    background: var(--xd-gradient);
    transition: width .25s ease;
}

.xd-ocr-status {
    min-height: 20px;
    margin: 10px 0 0;
    font-size: 13px;
    color: var(--xd-text-weak);
}

.xd-ocr-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    background: #f8faff;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
}

.xd-ocr-toolbar .xd-btn { margin-left: auto; }

.xd-ocr-hint {
    font-size: 12.5px;
    color: var(--xd-text-mute);
}

.xd-ocr-list { margin-top: 12px; }

.xd-ocr-item {
    display: flex;
    gap: 10px;
    margin-bottom: 8px;
    padding: 10px 12px;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
    cursor: pointer;
}

.xd-ocr-item:hover { border-color: #d5dcea; }

.xd-ocr-item.is-new {
    background: #fffdf7;
    border-style: dashed;
}

/* 报头、图注这类版面文字: 排到最后并淡一点, 不抢正文词的注意力 */
.xd-ocr-item.is-noise {
    background: #fbfbfc;
    opacity: .78;
}

/* 从图上的框点过来时闪一下, 让用户知道对的是哪一个 */
.xd-ocr-item.is-flash {
    background: rgba(255, 200, 0, .14);
}

.xd-ocr-item .xd-ocr-check { margin-top: 4px; }

.xd-ocr-item-main {
    display: flex;
    flex: 1 1 auto;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    min-width: 0;
}

.xd-ocr-word {
    font-size: 17px;
    font-weight: 700;
    color: var(--xd-text);
}

.xd-ocr-pron {
    font-size: 13px;
    color: var(--xd-text-mute);
}

.xd-ocr-meaning {
    flex: 1 1 100%;
    font-size: 13px;
    line-height: 1.6;
    color: var(--xd-text-weak);
}

.xd-ocr-tag {
    padding: 1px 7px;
    border-radius: 99px;
    font-size: 11.5px;
}

.xd-ocr-tag.is-form { background: #eef2ff; color: #3a5bcf; }
.xd-ocr-tag.is-new { background: #fff4e5; color: #a9701a; }
.xd-ocr-tag.is-noise { background: #eef1f5; color: #7b8794; }

.xd-ocr-suggest {
    padding: 1px 8px;
    border: 1px solid #d5dcea;
    border-radius: 99px;
    background: #fff;
    color: var(--xd-primary);
    font-size: 11.5px;
    cursor: pointer;
}

.xd-ocr-suggest:hover { border-color: var(--xd-primary); }

/* 改字: 词后面跟一个小按钮, 点开就地变成输入框 */
.xd-ocr-fix {
    padding: 0 7px;
    border: 1px dashed #c9d2e2;
    border-radius: 99px;
    background: transparent;
    color: var(--xd-text-mute);
    font-size: 11.5px;
    line-height: 18px;
    cursor: pointer;
    opacity: .75;
}

.xd-ocr-fix:hover {
    opacity: 1;
    border-color: var(--xd-primary);
    color: var(--xd-primary);
}

.xd-ocr-fix-input {
    width: 9em;
    padding: 2px 8px;
    border: 1px solid var(--xd-primary);
    border-radius: 6px;
    background: #fff;
    font-size: 15px;
    font-weight: 700;
    color: var(--xd-text);
}

.xd-ocr-fix-ok,
.xd-ocr-fix-cancel {
    margin-left: 4px;
    padding: 1px 9px;
    border-radius: 99px;
    font-size: 11.5px;
    cursor: pointer;
}

.xd-ocr-fix-ok {
    border: 1px solid var(--xd-primary);
    background: var(--xd-primary);
    color: #fff;
}

.xd-ocr-fix-cancel {
    border: 1px solid #d5dcea;
    background: #fff;
    color: var(--xd-text-mute);
}

.xd-ocr-tips {
    margin: 0;
    padding-left: 20px;
    font-size: 13.5px;
    color: var(--xd-text-weak);
}

.xd-ocr-tips li { margin-bottom: 6px; }

.xd-ocr-phrases {
    margin-top: 14px;
    padding: 12px 14px;
    background: #f8faff;
    border: 1px solid var(--xd-border);
    border-radius: var(--xd-radius-sm);
}

.xd-ocr-phrases-head {
    margin: 0 0 8px;
    font-size: 13px;
    color: var(--xd-text-weak);
}

.xd-ocr-phrases-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.xd-ocr-phrase {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    max-width: 100%;
    padding: 4px 10px;
    background: #fff;
    border: 1px solid #d5dcea;
    border-radius: 99px;
    font-size: 13px;
    text-decoration: none;
}

.xd-ocr-phrase:hover {
    border-color: var(--xd-primary);
    text-decoration: none;
}

.xd-ocr-phrase-word {
    font-weight: 700;
    color: var(--xd-text);
}

.xd-ocr-phrase-meaning {
    overflow: hidden;
    color: var(--xd-text-mute);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.xd-ocr-history {
    margin: 0;
    padding: 0;
    list-style: none;
}

.xd-ocr-history-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--xd-border);
}

.xd-ocr-history-item:last-child { border-bottom: 0; }

.xd-ocr-history-time {
    font-size: 13px;
    color: var(--xd-text);
}

.xd-ocr-history-meta {
    flex: 1 1 auto;
    font-size: 12.5px;
    color: var(--xd-text-mute);
}

.xd-ocr-history-item .xd-btn {
    padding: 2px 12px;
    font-size: 12.5px;
}

.xd-ocr-history-empty {
    padding: 6px 0;
    font-size: 13px;
    color: var(--xd-text-mute);
}

@media (max-width: 767px) {
    .xd-ocr-drop { min-height: 150px; }
    .xd-ocr-actions .xd-btn { flex: 1 1 0; min-width: 0; }
    .xd-ocr-toolbar .xd-btn { width: 100%; margin-left: 0; }
    .xd-ocr-preview img { max-height: 300px; }
    .xd-ocr-word { font-size: 16px; }
    .xd-ocr-phrase { max-width: 100%; }
    .xd-ocr-history-item .xd-btn { width: 100%; margin-left: 0; }
}