/* ==========================================================================
   脳トレ道場 (noutoredojo.com) - 首页专有样式表 (index.css)
   日本长者向・真实自然门户设计（去AI感、单栏居中、图文并茂、高对比易读排版）
   ========================================================================== */

/* 页面整体背景：温和干净的日式纸质感与浅米灰底色（参考222.png） */
body {
    background-color: var(--bg-primary);
    color: var(--text-main);
}

body.dark-theme {
    background-color: #0f172a;
    color: #f1f5f9;
}

/* 顶部唯一的核心分类导航横幅 (单行清晰，无冗余重复卡片) */
.nav-category-ribbon {
    background-color: #ffffff;
    border-bottom: 2px solid #e2e8f0;
    padding: 10px 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

body.dark-theme .nav-category-ribbon {
    background-color: #1e293b;
    border-bottom-color: #334155;
}

.nav-category-list {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-category-item a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 20px;
    font-size: 16px;
    font-weight: 800;
    color: #1e293b;
    text-decoration: none;
    border-radius: 8px;
    background-color: #f1f5f9;
    border: 1px solid #cbd5e1;
    transition: all 0.2s ease;
}

body.dark-theme .nav-category-item a {
    background-color: #0f172a;
    border-color: #334155;
    color: #e2e8f0;
}

.nav-category-item a:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

/* 主内容单栏居中架构 (页面居中聚焦，max-width 1060px) */
.home-main-section {
    padding: 30px 0 70px 0;
}

.home-single-column {
    max-width: 1060px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

/* ==========================================================================
   今月のおすすめ特集（10月・秋の脳トレ横幅，配以高质量秋日/长者温馨实景图）
   ========================================================================== */
.hero-feature-area {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.monthly-feature-banner {
    background-color: #ffffff;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
    display: grid;
    grid-template-columns: 360px 1fr;
    overflow: hidden;
    position: relative;
}

body.dark-theme .monthly-feature-banner {
    background-color: #1e293b;
    border-color: #334155;
}

.monthly-feature-image-box {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 240px;
    overflow: hidden;
    background-color: #f1f5f9;
}

.monthly-feature-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.monthly-feature-banner:hover .monthly-feature-img {
    transform: scale(1.03);
}

.monthly-feature-month-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    background-color: #ea580c;
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 900;
    box-shadow: 0 4px 10px rgba(234, 88, 12, 0.35);
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.1;
    z-index: 2;
}

.monthly-feature-month-tag span {
    font-size: 11px;
    font-weight: 700;
    opacity: 0.9;
}

.monthly-feature-content {
    padding: 28px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.monthly-feature-badge-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.badge-editorial {
    display: inline-block;
    background-color: #fef3c7;
    color: #92400e;
    font-size: 13px;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 6px;
    border: 1px solid #fde68a;
}

body.dark-theme .badge-editorial {
    background-color: #271f11;
    color: #fde68a;
    border-color: #713f12;
}

.monthly-feature-title {
    font-size: 26px;
    font-weight: 900;
    color: #0f172a;
    line-height: 1.4;
    margin-bottom: 12px;
}

body.dark-theme .monthly-feature-title {
    color: #f8fafc;
}

.monthly-feature-desc {
    font-size: 16px;
    color: #475569;
    line-height: 1.7;
    margin-bottom: 16px;
}

body.dark-theme .monthly-feature-desc {
    color: #94a3b8;
}

.monthly-feature-highlights {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    font-size: 13px;
    color: #0f766e;
    font-weight: 700;
}

.monthly-feature-highlights span {
    background-color: #f0fdfa;
    border: 1px solid #ccfbf1;
    padding: 3px 10px;
    border-radius: 4px;
}

body.dark-theme .monthly-feature-highlights span {
    background-color: #134e4a;
    border-color: #115e59;
    color: #99f6e4;
}

.monthly-facility-notice {
    background-color: #f8fafc;
    border-left: 4px solid #ea580c;
    padding: 12px 16px;
    border-radius: 0 8px 8px 0;
    font-size: 14px;
    color: #334155;
    line-height: 1.6;
}

body.dark-theme .monthly-facility-notice {
    background-color: #0f172a;
    color: #cbd5e1;
}

/* 顶部每日健脑提示三格卡片 */
.daily-tips-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.daily-tip-card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 16px 18px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

body.dark-theme .daily-tip-card {
    background-color: #1e293b;
    border-color: #334155;
}

.daily-tip-card:hover {
    transform: translateY(-2px);
    border-color: #94a3b8;
}

.daily-tip-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 20px;
}

.tip-icon-sun { background-color: #fef3c7; color: #b45309; }
.tip-icon-screen { background-color: #eff6ff; color: #1d4ed8; }
.tip-icon-heart { background-color: #f0fdf4; color: #15803d; }

body.dark-theme .tip-icon-sun { background-color: #2e1d08; color: #fde68a; }
body.dark-theme .tip-icon-screen { background-color: #172554; color: #93c5fd; }
body.dark-theme .tip-icon-heart { background-color: #052e16; color: #86efac; }

.daily-tip-text h3 {
    font-size: 15px;
    font-weight: 800;
    color: #0f172a;
    margin: 0 0 4px 0;
}

body.dark-theme .daily-tip-text h3 {
    color: #f8fafc;
}

.daily-tip-text p {
    font-size: 13px;
    color: #64748b;
    line-height: 1.5;
    margin: 0;
}

body.dark-theme .daily-tip-text p {
    color: #94a3b8;
}

/* 今日の1分ミニ脳トレ（每日互动小问答盒子，极大充实首屏上方） */
.daily-mini-teaser {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border: 1px solid #fde68a;
    border-radius: 12px;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.08);
}

body.dark-theme .daily-mini-teaser {
    background: #251e12;
    border-color: #713f12;
}

.mini-teaser-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.mini-teaser-badge {
    background-color: #ea580c;
    color: #ffffff;
    font-size: 12px;
    font-weight: 900;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.mini-teaser-title {
    font-size: 16px;
    font-weight: 900;
    color: #78350f;
    margin: 0;
}

body.dark-theme .mini-teaser-title {
    color: #fef3c7;
}

.mini-teaser-question {
    font-size: 15px;
    font-weight: 700;
    color: #92400e;
    margin-top: 2px;
}

body.dark-theme .mini-teaser-question {
    color: #fde68a;
}

.mini-teaser-btn {
    background-color: #ffffff;
    color: #ea580c;
    border: 1px solid #fdba74;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 800;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.mini-teaser-btn:hover {
    background-color: #ea580c;
    color: #ffffff;
    border-color: #ea580c;
}

/* 热门热搜关键词快速直达栏 */
.quick-keywords-bar {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 14px;
}

body.dark-theme .quick-keywords-bar {
    background-color: #1e293b;
    border-color: #334155;
}

.quick-keywords-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 800;
    color: #0f172a;
    flex-shrink: 0;
}

body.dark-theme .quick-keywords-label {
    color: #f8fafc;
}

.quick-keywords-list {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.quick-kw-item {
    padding: 4px 12px;
    border-radius: 6px;
    background-color: #f1f5f9;
    color: #334155;
    text-decoration: none;
    font-weight: 700;
    font-size: 13px;
    border: 1px solid #e2e8f0;
    transition: all 0.2s ease;
}

body.dark-theme .quick-kw-item {
    background-color: #0f172a;
    border-color: #334155;
    color: #cbd5e1;
}

.quick-kw-item:hover {
    background-color: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

/* ==========================================================================
   通用区块标题栏（日式门户标准：醒目标题、左侧色块条、简要副标）
   ========================================================================== */
.portal-section-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e2e8f0;
}

body.dark-theme .portal-section-header {
    border-bottom-color: #334155;
}

.portal-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.portal-header-accent {
    width: 6px;
    height: 28px;
    border-radius: 3px;
    background-color: var(--color-primary);
}

.portal-header-title {
    font-size: 24px;
    font-weight: 900;
    color: #0f172a;
    letter-spacing: -0.3px;
    margin: 0;
}

body.dark-theme .portal-header-title {
    color: #f8fafc;
}

.portal-header-sub {
    font-size: 14px;
    color: #64748b;
    font-weight: 700;
    margin-left: 8px;
}

/* ==========================================================================
   ランダム表示（精选推荐，3列图文卡片）
   ========================================================================== */
.random-quiz-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* 测验话题卡片：全卡片均为超链接 <a>，指针变为手型 (cursor: pointer) */
.random-quiz-card {
    background-color: #ffffff;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.03);
    transition: all 0.25s ease;
    cursor: pointer;
}

body.dark-theme .random-quiz-card {
    background-color: #1e293b;
    border-color: #334155;
}

.random-quiz-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: #94a3b8;
}

.random-quiz-thumb-box {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background-color: #f1f5f9;
}

.random-quiz-thumb {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.35s ease;
}

.random-quiz-card:hover .random-quiz-thumb {
    transform: scale(1.05);
}

.random-quiz-body {
    padding: 18px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.random-quiz-title {
    font-size: 18px;
    font-weight: 900;
    color: #0f172a;
    line-height: 1.45;
    margin-bottom: 10px;
    flex-grow: 1;
}

body.dark-theme .random-quiz-title {
    color: #f8fafc;
}

.random-quiz-desc {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 14px;
}

.random-quiz-footer-link {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    font-size: 14px;
    font-weight: 800;
    color: var(--color-primary);
    border-top: 1px dashed #e2e8f0;
    padding-top: 12px;
}

body.dark-theme .random-quiz-footer-link {
    border-top-color: #334155;
}

/* ==========================================================================
   五大分类模块（文字・懐かしい・日本めぐり・健康・雑学）真实日本媒体排版
   ========================================================================== */
.category-section-wrapper {
    background-color: #ffffff;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    padding: 26px 28px;
    box-shadow: 0 3px 14px rgba(0, 0, 0, 0.02);
}

body.dark-theme .category-section-wrapper {
    background-color: #1e293b;
    border-color: #334155;
}

/* 分类专属标题条 */
.category-header-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-radius: 10px;
    color: #ffffff;
    margin-bottom: 24px;
    box-sizing: border-box;
    width: 100%;
}

.category-header-strip.theme-kanji {
    background: linear-gradient(90deg, #0f766e 0%, #14b8a6 100%);
}

.category-header-strip.theme-nostalgia {
    background: linear-gradient(90deg, #c2410c 0%, #f97316 100%);
}

.category-header-strip.theme-japan {
    background: linear-gradient(90deg, #1d4ed8 0%, #3b82f6 100%);
}

.category-header-strip.theme-health {
    background: linear-gradient(90deg, #15803d 0%, #22c55e 100%);
}

.category-header-strip.theme-trivia {
    background: linear-gradient(90deg, #6b21a8 0%, #a855f7 100%);
}

.cat-strip-title-box {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
    flex: 1;
}

.cat-strip-icon {
    font-size: 24px;
    flex-shrink: 0;
    line-height: 1;
}

.cat-strip-title {
    font-size: 22px;
    font-weight: 900;
    margin: 0;
    letter-spacing: 0.5px;
    white-space: nowrap;
    flex-shrink: 0;
}

.cat-strip-sub {
    font-size: 13px;
    font-weight: 700;
    opacity: 0.92;
    margin-left: 8px;
    min-width: 0;
}

/* 分类标题条右侧：点击跳转到该分类的完整列表页（すべて見る >） */
.cat-strip-link {
    background-color: rgba(255, 255, 255, 0.22);
    color: #ffffff;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 800;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
    cursor: pointer;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.cat-strip-link:hover {
    background-color: #ffffff;
    color: #0f172a;
    transform: translateX(3px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
}

/* 卡片网格：3 列标准杂志门户栅格 */
.portal-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* 单张测验真实图文卡片 (全卡片为 <a> 链接，鼠标悬停整卡可点击) */
.quiz-media-card {
    background-color: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    transition: all 0.25s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.02);
    cursor: pointer;
}

body.dark-theme .quiz-media-card {
    background-color: #0f172a;
    border-color: #334155;
}

.quiz-media-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    border-color: #94a3b8;
}

.quiz-media-thumb-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background-color: #f1f5f9;
}

.quiz-media-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.quiz-media-card:hover .quiz-media-img {
    transform: scale(1.06);
}

.quiz-media-content {
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.quiz-media-title {
    font-size: 18px;
    font-weight: 900;
    color: #0f172a;
    line-height: 1.45;
    margin-bottom: 10px;
    flex-grow: 1;
}

body.dark-theme .quiz-media-title {
    color: #f8fafc;
}

.quiz-media-desc {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 14px;
}

body.dark-theme .quiz-media-desc {
    color: #94a3b8;
}

.quiz-media-action {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    font-size: 14px;
    font-weight: 800;
    color: var(--color-primary);
    border-top: 1px dashed #e2e8f0;
    padding-top: 12px;
    transition: color 0.2s ease;
}

.quiz-media-card:hover .quiz-media-action {
    color: #2563eb;
}

body.dark-theme .quiz-media-action {
    border-top-color: #334155;
}

/* ==========================================================================
   响应式调整
   ========================================================================== */
@media (max-width: 960px) {
    .portal-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .random-quiz-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .monthly-feature-banner {
        grid-template-columns: 1fr;
    }
    .monthly-feature-image-box {
        min-height: 200px;
    }
    .daily-tips-row {
        grid-template-columns: 1fr;
    }
    .cat-strip-title {
        font-size: 20px;
    }
    .cat-strip-sub {
        font-size: 12.5px;
    }
}

/* 平板与手机端 category-header-strip 深度适老适配 (包含 theme-kanji 等所有分类横幅) */
@media (max-width: 768px) {
    .category-section-wrapper {
        padding: 16px 14px;
        border-radius: 14px;
        margin-bottom: 24px;
        box-sizing: border-box;
    }

    /* 移动端自适应双行结构：首行放置 图标 + 分类大标题 + 右侧「すべて見る >」按钮，次行全宽通栏展示导语说明，绝不挤压溢出 */
    .category-header-strip {
        display: grid;
        grid-template-columns: auto 1fr auto;
        grid-template-rows: auto auto;
        align-items: center;
        gap: 6px 8px;
        padding: 11px 14px;
        margin-bottom: 18px;
        border-radius: 12px;
        box-sizing: border-box;
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .cat-strip-title-box {
        display: contents;
    }

    .cat-strip-icon {
        grid-column: 1;
        grid-row: 1;
        font-size: 20px;
        line-height: 1;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .cat-strip-title {
        grid-column: 2;
        grid-row: 1;
        font-size: 18px;
        font-weight: 900;
        line-height: 1.25;
        margin: 0;
        white-space: nowrap;
    }

    .cat-strip-link {
        grid-column: 3;
        grid-row: 1;
        justify-self: end;
        padding: 4px 12px;
        font-size: 13px;
        font-weight: 800;
        border-radius: 16px;
        white-space: nowrap;
        background-color: rgba(255, 255, 255, 0.25);
        gap: 2px;
    }

    .cat-strip-sub {
        grid-column: 1 / -1;
        grid-row: 2;
        display: block;
        width: 100%;
        margin-left: 0;
        margin-top: 3px;
        padding-top: 6px;
        border-top: 1px solid rgba(255, 255, 255, 0.22);
        font-size: 12px;
        font-weight: 600;
        line-height: 1.45;
        opacity: 0.95;
        word-break: break-all;
        letter-spacing: 0.2px;
    }
}

@media (max-width: 640px) {
    .portal-card-grid {
        grid-template-columns: 1fr;
    }
    .random-quiz-grid {
        grid-template-columns: 1fr;
    }
    .monthly-feature-content {
        padding: 20px;
    }

    .monthly-feature-badge-row,
    .mini-teaser-left {
        align-items: flex-start;
        flex-direction: column;
    }

    .mini-teaser-left,
    .mini-teaser-left > div,
    .portal-header-left,
    .portal-header-left > div {
        min-width: 0;
    }

    .mini-teaser-btn {
        width: 100%;
        justify-content: center;
    }

    .portal-header-sub {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .category-section-wrapper {
        padding: 14px 10px;
        border-radius: 12px;
    }

    .category-header-strip {
        padding: 10px 12px;
        gap: 5px 6px;
    }

    .cat-strip-title {
        font-size: 17px;
    }

    .cat-strip-link {
        padding: 3px 10px;
        font-size: 12px;
    }

    .cat-strip-sub {
        font-size: 11.5px;
        line-height: 1.4;
    }
}

/* 本地 SVG sprite 尺寸（参考稿原本由 Lucide 运行时注入） */
.daily-tip-icon svg {
    width: 22px;
    height: 22px;
}

.mini-teaser-btn svg,
.quick-keywords-label svg,
.random-quiz-footer-link svg,
.cat-strip-link svg,
.quiz-media-action svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}