/* === 蓝色主题 === */
:root {
    --c-primary: #3f51b5;
    --c-primary-light: #e8eaf6;
    --c-primary-dark: #303f9f;
    --c-text: #333;
    --c-text-light: #888;
    --c-border: #eee;
    --c-bg: #fafafa;
    --radius: 8px;
}

/* === 全局 === */
*,
*::before,
*::after {
    box-sizing: border-box;
}
html { height: 100%; }
body {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    background: var(--c-bg);
    color: var(--c-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
}
body > .content-area { flex: 1; }
a { overflow-wrap: anywhere; }
img,
video,
iframe {
    max-width: 100%;
}

/* === 导航 === */
.navbar {
    background: var(--c-primary) !important;
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}
.navbar .navbar-item {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
}
.navbar .navbar-item:hover,
.navbar .navbar-item.is-active {
    background: rgba(255,255,255,0.15);
    color: #fff;
}
/* 导航汉堡按钮（移动端） */
.navbar-burger {
    color: #fff;
}
.navbar-burger span { background: #fff; }
.mobile-nav-menu {
    display: none;
}

/* === 容器 === */
.content-area {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.2rem 1rem;
}

.search-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 170px);
}
.search-panel {
    width: min(600px, 100%);
    margin: 0 auto;
}

/* === 卡片 === */
.q-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    margin-bottom: 0.6rem;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.q-card:hover {
    border-color: var(--c-primary);
    box-shadow: 0 2px 8px rgba(63,81,181,0.10);
}
.q-card .title-link {
    color: var(--c-text);
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.7;
    display: block;
    margin-bottom: 0.5rem;
    overflow-wrap: anywhere;
}
.q-card .title-link:hover {
    color: var(--c-primary);
}

/* === 标签 === */
.tag {
    background: var(--c-primary-light) !important;
    color: var(--c-primary) !important;
    border-radius: 20px !important;
    font-weight: 500;
    font-size: 0.7rem !important;
}
.tag:hover {
    background: #d1d5f0 !important;
}

/* === 热度 === */
.hot {
    font-size: 0.75rem;
    color: var(--c-text-light);
    margin-left: auto;
    white-space: nowrap;
}

/* === Tab === */
.tabs ul { border-bottom-color: var(--c-border); }
.tabs a {
    color: var(--c-text-light);
    font-weight: 600;
    border-bottom-width: 3px;
}
.tabs li.is-active a {
    color: var(--c-primary);
    border-bottom-color: var(--c-primary);
}

/* === 详情页 === */
.detail-box {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 0.8rem;
}
.detail-box h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.8;
    overflow-wrap: anywhere;
}

/* 选项 */
.opt {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    margin-bottom: 2px;
}
.opt:hover { background: var(--c-bg); }
.opt .seq {
    flex-shrink: 0;
    width: 26px; height: 26px;
    line-height: 26px;
    text-align: center;
    border-radius: 50%;
    background: var(--c-primary-light);
    color: var(--c-primary);
    font-weight: 700;
    font-size: 0.8rem;
}
.opt > span:not(.seq) {
    flex: 1;
    min-width: 0;
    overflow-wrap: anywhere;
}

/* 答案框 */
.ans-box {
    background: #fff;
    border: 1px solid var(--c-border);
    border-left: 4px solid var(--c-primary);
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    margin-bottom: 0.8rem;
}
.ans-box .label { color: var(--c-primary); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
.ans-box .value { font-size: 1.1rem; font-weight: 600; color: #2e7d32; margin-top: 4px; }

/* 解析框 */
.ana-box {
    background: #fff;
    border: 1px solid var(--c-border);
    border-left: 4px solid #ff9800;
    border-radius: var(--radius);
    padding: 1rem 1.2rem;
    margin-bottom: 0.8rem;
}
.ana-box .label { color: #ff9800; font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.5px; }
.ana-box .value { line-height: 1.8; margin-top: 4px; }
.detail-box table,
.ana-box table,
.opt table {
    display: block;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.ad-box {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    min-height: 90px;
    margin-bottom: 0.8rem;
    padding: 0.75rem;
    overflow: hidden;
}
.ad-box:empty {
    display: none;
}
.ad-box > div {
    min-height: 70px;
}

/* AI 按钮 */
.btn-ai {
    display: block;
    width: 100%;
    padding: 0.7rem;
    background: var(--c-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}
.btn-ai:hover { background: var(--c-primary-dark); }

/* 年份卡 */
.year-card {
    background: var(--c-primary);
    color: #fff;
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
    margin-bottom: 0.8rem;
}
.year-card .num { font-size: 1.8rem; font-weight: 700; }

.qr-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    margin-bottom: 0.8rem;
    overflow: hidden;
    text-align: center;
}
.qr-image-button {
    display: block;
    width: 100%;
    padding: 1rem 1rem 0.4rem;
    border: 0;
    background: transparent;
    cursor: pointer;
}
.qr-image-button img {
    display: block;
    width: min(200px, 100%);
    height: auto;
    margin: 0 auto;
    border-radius: 4px;
}
.qr-copy {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    z-index: 1;
    border: 1px solid var(--c-primary-light);
    border-radius: 999px;
    background: #fff;
    color: var(--c-primary);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.25rem 0.55rem;
}
.qr-copy:hover {
    background: var(--c-primary-light);
}
.qr-card-body {
    padding: 0.6rem 1rem 1rem;
}
.qr-title {
    color: var(--c-text);
    font-size: 0.95rem;
    font-weight: 700;
}
.qr-subtitle {
    color: var(--c-text-light);
    font-size: 0.78rem;
    margin-top: 0.25rem;
}
.qr-dialog {
    position: fixed;
    inset: 0;
    z-index: 9998;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(0,0,0,0.58);
}
.qr-dialog.show {
    display: flex;
}
.qr-dialog-content {
    position: relative;
    max-width: min(92vw, 360px);
    padding: 1.5rem;
    border-radius: var(--radius);
    background: #fff;
}
.qr-dialog-content img {
    display: block;
    max-width: 100%;
    height: auto;
}
.qr-dialog-close {
    position: absolute;
    top: 0.35rem;
    right: 0.45rem;
    width: 30px;
    height: 30px;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--c-text-light);
    cursor: pointer;
    font-size: 1.25rem;
    line-height: 30px;
}
.qr-dialog-close:hover {
    background: var(--c-bg);
    color: var(--c-text);
}

/* === 侧栏面板 === */
.panel {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 0.8rem;
}
.panel .panel-heading {
    background: #f5f5f5;
    color: var(--c-text);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.6rem 1rem;
    border-bottom: 1px solid var(--c-border);
}
.panel .panel-heading.is-primary {
    background: var(--c-primary);
    color: #fff;
}
.panel .panel-block {
    border-bottom: 1px solid var(--c-border);
    font-size: 0.85rem;
    padding: 0.55rem 1rem;
    transition: background 0.1s;
    min-width: 0;
    overflow-wrap: anywhere;
}
.panel .panel-block:last-child { border-bottom: none; }
.panel .panel-block:hover { background: var(--c-primary-light); }
/* 推荐题目：单行截断 */
.panel .panel-block.truncate {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--c-text);
}
.panel .panel-block.truncate:hover { color: var(--c-primary); }

/* === 分页 === */
.pagination-link.is-current {
    background: var(--c-primary) !important;
    border-color: var(--c-primary) !important;
}

.navbar { flex-shrink: 0; }

/* === 页脚 === */
.footer {
    flex-shrink: 0;
    text-align: center;
    padding: 1.5rem;
    font-size: 0.8rem;
    color: var(--c-text-light);
    border-top: 1px solid var(--c-border);
    margin-top: 2rem;
}
.footer a { color: var(--c-text-light); }
.footer a:hover { color: var(--c-primary); }

/* === 题干/解析中的图片 === */
.detail-box img,
.ana-box img,
.opt img {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
    border-radius: 4px;
}

/* === Toast 通知 === */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: #323232;
    color: #fff;
    padding: 0.7rem 1.5rem;
    border-radius: 6px;
    font-size: 0.9rem;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.25s;
    pointer-events: none;
}
.toast.show { opacity: 1; }

/* === 响应式 / 移动端 === */
@media (max-width: 768px) {
    .content-area { padding: 0.6rem; }

    /* 导航栏：logo 缩小，菜单项平铺一行可横向滚动 */
    .navbar { display: block; }
    .navbar .navbar-brand { display: flex; }
    .navbar .navbar-brand .navbar-item { font-size: 0.95rem; padding: 0.5rem 0.7rem; }
    .navbar-menu { display: flex !important; box-shadow: none; }
    .navbar-end { width: 100%; justify-content: space-around; margin: 0 !important; }
    .navbar .navbar-item { padding: 0.5rem 0.4rem; font-size: 0.85rem; }

    /* 双栏改单栏（覆盖 Bulma 默认 flex） */
    .columns { display: block !important; margin: 0 !important; }
    .columns > .column { width: 100% !important; display: block !important; padding: 0.4rem 0 !important; }

    /* 卡片/详情框收紧 */
    .q-card { padding: 0.7rem 0.8rem; }
    .q-card .title-link { font-size: 0.9rem; line-height: 1.6; }
    .detail-box { padding: 1rem; }
    .detail-box h4 { font-size: 1rem; line-height: 1.6; }

    /* 选项 */
    .opt { padding: 8px 6px; gap: 8px; }
    .opt .seq { width: 22px; height: 22px; line-height: 22px; font-size: 0.72rem; }

    /* 答案/解析 */
    .ans-box, .ana-box { padding: 0.7rem 0.9rem; }
    .ans-box .value { font-size: 1rem; }

    /* Tab */
    .tabs.is-medium { font-size: 0.9rem; }
    .tabs a { padding: 0.4rem 0.6rem; }

    /* 年份卡 */
    .year-card { padding: 0.7rem; }
    .year-card .num { font-size: 1.4rem; }

    /* 搜索页 */
    .field.has-addons { flex-wrap: wrap; }
    .field.has-addons .control { flex: 1 1 auto; }
    .content-area [style*="max-width:600px"] { max-width: 100% !important; margin: 1rem auto !important; }
    .search-page {
        align-items: center;
        min-height: calc(100vh - 140px);
    }
    .search-panel {
        width: 100%;
    }

    /* 分页 */
    .pagination { flex-wrap: wrap; gap: 4px; }

    /* 页脚 */
    .footer { padding: 1rem; font-size: 0.72rem; line-height: 1.8; }
}

@media (max-width: 480px) {
    .navbar .navbar-item { font-size: 0.78rem; padding: 0.4rem 0.3rem; }
    .navbar .navbar-brand .navbar-item { font-size: 0.88rem; }
}

@media (max-width: 1023px) {
    .navbar {
        display: flex;
        flex-wrap: nowrap;
        overflow: hidden;
    }

    .navbar-brand,
    .navbar-menu,
    .navbar-end {
        align-items: stretch;
        display: flex;
    }

    .navbar-brand {
        flex: 0 0 auto;
        min-width: 0;
    }

    .navbar-menu {
        background: var(--c-primary);
        box-shadow: none;
        flex: 1 1 auto;
        min-width: 0;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 0;
        -webkit-overflow-scrolling: touch;
    }

    .navbar-end {
        flex: 0 0 auto;
        justify-content: flex-start;
        margin-left: 0 !important;
        min-width: max-content;
        width: auto;
    }

    .navbar .navbar-item {
        flex: 0 0 auto;
        min-height: 44px;
        white-space: nowrap;
    }

    .navbar .navbar-brand .navbar-item {
        max-width: 46vw;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

@media (max-width: 768px) {
    .content-area {
        padding: 0.75rem;
    }

    .navbar .navbar-brand .navbar-item {
        font-size: 0.95rem !important;
        padding: 0.55rem 0.75rem !important;
    }

    .navbar .navbar-item {
        font-size: 0.86rem;
        padding: 0.55rem 0.65rem;
    }

    .q-card {
        margin-bottom: 0.55rem;
        padding: 0.8rem 0.85rem;
    }

    .q-card .is-flex {
        align-items: flex-start !important;
        gap: 6px !important;
    }

    .q-card .hot {
        margin-left: 0;
        width: 100%;
    }

    .detail-box {
        margin-bottom: 0.7rem;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tabs ul {
        min-width: max-content;
    }

    .tabs a {
        min-height: 40px;
        padding: 0.45rem 0.7rem;
        white-space: nowrap;
    }

    .panel {
        margin-bottom: 0.65rem;
    }

    .panel .panel-heading {
        padding: 0.55rem 0.75rem;
    }

    .panel .panel-block {
        padding: 0.6rem 0.75rem;
    }

    .select,
    select.select {
        width: 100%;
    }

    .field.has-addons {
        align-items: stretch;
        flex-wrap: nowrap;
    }

    .field.has-addons .control {
        min-width: 0;
    }

    .field.has-addons .control.is-expanded {
        flex: 1 1 auto;
    }

    .field.has-addons .button {
        min-height: 40px;
    }

    .pagination {
        align-items: stretch;
        gap: 6px;
        justify-content: center;
    }

    .pagination-previous,
    .pagination-next {
        flex: 1 1 7rem;
        margin: 0;
        min-height: 38px;
    }

    .pagination-list {
        justify-content: center;
        order: 3;
        width: 100%;
    }

    .toast {
        bottom: 1rem;
        max-width: calc(100vw - 2rem);
        padding: 0.65rem 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .content-area {
        padding: 0.55rem;
    }

    .navbar .navbar-item {
        font-size: 0.8rem;
        padding: 0.5rem 0.55rem;
    }

    .navbar .navbar-brand .navbar-item {
        font-size: 0.9rem !important;
        max-width: 42vw;
    }

    .field.has-addons {
        display: block;
    }

    .field.has-addons .control + .control {
        margin-top: 0.5rem;
    }

    .field.has-addons .button {
        width: 100%;
    }

    .detail-box,
    .ans-box,
    .ana-box {
        border-radius: 6px;
    }
}

@media (max-width: 768px) {
    .navbar {
        display: block;
        overflow: visible;
    }

    .navbar-brand {
        width: 100%;
        background: var(--c-primary);
    }

    .navbar .navbar-brand .navbar-item {
        max-width: none;
        min-height: 48px;
        width: 100%;
        font-size: 1rem !important;
        letter-spacing: 0;
    }

    .navbar-menu {
        width: 100%;
        border-top: 1px solid rgba(255,255,255,0.14);
        background: var(--c-primary);
        scrollbar-width: none;
    }

    .navbar-menu::-webkit-scrollbar {
        display: none;
    }

    .navbar-end {
        gap: 6px;
        min-width: 100%;
        padding: 6px 8px;
        width: max-content;
    }

    .navbar .navbar-menu .navbar-item {
        min-height: 34px;
        padding: 0.35rem 0.8rem;
        border-radius: 999px;
        font-size: 0.88rem;
        line-height: 1;
        color: rgba(255,255,255,0.82);
    }

    .navbar .navbar-menu .navbar-item:hover,
    .navbar .navbar-menu .navbar-item.is-active {
        background: rgba(255,255,255,0.18);
        color: #fff;
    }

    .content-area {
        padding-top: 0.9rem;
    }
}

@media (max-width: 480px) {
    .navbar .navbar-brand .navbar-item {
        font-size: 0.96rem !important;
    }

    .navbar .navbar-menu .navbar-item {
        min-height: 32px;
        padding: 0.34rem 0.72rem;
        font-size: 0.84rem;
    }
}

@media (max-width: 768px) {
    .navbar {
        display: flex;
        min-height: 52px;
        overflow: visible;
    }

    .navbar-brand {
        display: flex;
        align-items: center;
        width: 100%;
        background: var(--c-primary);
    }

    .navbar .navbar-brand .navbar-item {
        flex: 1 1 auto;
        min-width: 0;
        max-width: none;
        min-height: 52px;
        width: auto;
        padding: 0.5rem 0.75rem !important;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .navbar-menu {
        display: none !important;
    }

    .content-area {
        padding-top: 0.75rem;
    }
}

@media (max-width: 360px) {
    .navbar .navbar-brand .navbar-item {
        font-size: 0.9rem !important;
    }

}

@media (max-width: 768px) {
    .mobile-nav-menu {
        position: relative;
        display: block;
        flex: 0 0 auto;
        margin-left: auto;
        padding-right: 0.75rem;
    }

    .mobile-nav-menu summary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        min-height: 34px;
        padding: 0;
        border: 1px solid rgba(255,255,255,0.24);
        border-radius: 8px;
        background: rgba(255,255,255,0.14);
        color: #fff;
        cursor: pointer;
        font-size: 0;
        font-weight: 600;
        line-height: 0;
        list-style: none;
        user-select: none;
    }

    .mobile-nav-menu summary::-webkit-details-marker {
        display: none;
    }

    .mobile-nav-menu summary::before {
        width: 14px;
        height: 10px;
        margin: 0;
        background:
            linear-gradient(currentColor, currentColor) 0 0 / 100% 2px no-repeat,
            linear-gradient(currentColor, currentColor) 0 4px / 100% 2px no-repeat,
            linear-gradient(currentColor, currentColor) 0 8px / 100% 2px no-repeat;
        content: "";
        opacity: 0.95;
    }

    .mobile-nav-menu summary::after {
        content: none;
    }

    .mobile-nav-menu[open] summary {
        background: rgba(255,255,255,0.22);
        border-color: rgba(255,255,255,0.5);
    }

    .mobile-nav-panel {
        position: absolute;
        top: calc(100% + 8px);
        right: 0.75rem;
        z-index: 20;
        min-width: 8rem;
        padding: 0.4rem;
        border: 1px solid var(--c-border);
        border-radius: var(--radius);
        background: #fff;
        box-shadow: 0 10px 24px rgba(0,0,0,0.18);
    }

    .mobile-nav-panel a {
        display: block;
        padding: 0.6rem 0.75rem;
        border-radius: 6px;
        color: var(--c-text);
        font-size: 0.9rem;
        font-weight: 600;
        text-decoration: none;
        white-space: nowrap;
    }

    .mobile-nav-panel a:hover,
    .mobile-nav-panel a.is-active {
        background: var(--c-primary-light);
        color: var(--c-primary);
    }
}

@media (max-width: 360px) {
    .mobile-nav-menu {
        padding-right: 0.55rem;
    }

    .mobile-nav-menu summary {
        width: 36px;
        min-height: 32px;
        font-size: 0;
    }

    .mobile-nav-panel {
        right: 0.55rem;
    }
}