/*
 * search-custom.css
 * 搜索框 + 两栏搜索结果页样式（1400px，英文界面）
 */

/* ================================================================
   Design Tokens
   ================================================================ */
:root {
    --cst-primary:           #c8102e;
    --cst-primary-dark:      #c8102e;
    --cst-bg:                #f1f5f9;
    --cst-surface:           #ffffff;
    --cst-border:            #e2e8f0;
    --cst-text:              #1e293b;
    --cst-text-muted:        #64748b;
    --cst-radius-sm:         4px;
    --cst-radius-md:         8px;
    --cst-radius-lg:         12px;
    --cst-shadow:            0 1px 3px rgba(0,0,0,.08);
    --cst-shadow-hover:      0 6px 20px rgba(0,0,0,.11);
    --cst-transition:        0.18s ease;
    --cst-max-width:         1400px;
    --cst-sidebar-width:     380px;

    /* Badge 颜色 */
    --cst-badge-post:        #c8102e;
    --cst-badge-supplier:    #10b981;
    --cst-badge-product:     #f59e0b;
    --cst-badge-exhibition:  #ef4444;
}

/* ================================================================
   Accessibility
   ================================================================ */
.screen-reader-text {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* ================================================================
   搜索框
   ================================================================ */
.cst-search-form { 
    width: 60%; 
    margin: 0 auto;
    }

.cst-search-form__inner {
    display: flex;
    align-items: center;
    border: 2px solid var(--cst-border);
    border-radius: 999px;
    background: var(--cst-surface);
    overflow: hidden;
    transition: border-color var(--cst-transition), box-shadow var(--cst-transition);
}

.cst-search-form__inner:focus-within {
    border-color: var(--cst-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,.15);
}

/* 类型下拉 */
.cst-search-form__type {
    flex-shrink: 0;
    border: none;
    outline: none;
    background: transparent;
    padding: 0 6px 0 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--cst-text);
    cursor: pointer;
    height: 48px;
    /* 自定义箭头 */
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24'%3E%3Cpath fill='%2364748b' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    padding-right: 22px;
}

.cst-search-form__type:focus-visible {
    outline: 2px solid var(--cst-primary);
    outline-offset: -2px;
    border-radius: var(--cst-radius-sm);
}

/* 竖线分隔符 */
.cst-search-form__divider {
    display: block;
    width: 1px;
    height: 22px;
    background: var(--cst-border);
    flex-shrink: 0;
    margin: 0 4px;
}

/* 搜索输入框 */
.cst-search-form__input {
    flex: 1;
    border: none;
    outline: none;
    padding: 12px 16px;
    font-size: 15px;
    color: var(--cst-text);
    background: transparent;
    -webkit-appearance: none;
    min-width: 0;
}

.cst-search-form__input::placeholder { color: var(--cst-text-muted); }
.cst-search-form__input::-webkit-search-cancel-button { display: none; }

/* 搜索按钮 */
.cst-search-form__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px; height: 46px;
    margin: 3px;
    flex-shrink: 0;
    border: none;
    border-radius: 999px;
    background: var(--cst-primary);
    color: #fff;
    cursor: pointer;
    transition: background var(--cst-transition);
}

.cst-search-form__btn:hover,
.cst-search-form__btn:focus-visible {
    background: var(--cst-primary-dark);
    outline: 2px solid var(--cst-primary);
    outline-offset: 2px;
}

.cst-search-form__btn svg { fill: currentColor; pointer-events: none; }

/* ================================================================
   页面整体
   ================================================================ */
.cst-search-page {
    padding: 32px 24px 64px;
    background: var(--cst-bg);
    min-height: 60vh;
}

.cst-search-page__container {
    max-width: var(--cst-max-width);
    margin: 0 auto;
}

/* 顶部搜索栏（跨全宽） */
.cst-search-page__bar {
    margin-bottom: 28px;
}

/* ================================================================
   两栏布局
   ================================================================ */
.cst-search-page__columns {
    display: flex;
    gap: 28px;
    align-items: flex-start;
}

/* ================================================================
   左栏：推荐内容
   ================================================================ */
.cst-sidebar {
    width: var(--cst-sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cst-sidebar__section {
    background: var(--cst-surface);
    border: 1px solid var(--cst-border);
    border-radius: var(--cst-radius-lg);
    padding: 18px;
    box-shadow: var(--cst-shadow);
}

.cst-sidebar__section-title {
    margin: 0 0 14px;
    font-size: 14px!important;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--cst-text-muted);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--cst-border);
}

.cst-sidebar__list {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cst-sidebar__empty {
    font-size: 13px;
    color: var(--cst-text-muted);
    text-align: center;
    padding: 12px 0;
}

/* 左栏推荐卡片 */
.cst-sidebar-card {
    display: flex;
    gap: 10px;
    align-items: self-start;
    padding-bottom: 10px;
    border-bottom: 1px dotted var(--cst-border);
}

.cst-sidebar-card:last-child{
    border-bottom: none;
}

.cst-sidebar-card__thumb-wrap {
    flex-shrink: 0;
    display: block;
    width: 106px; height: 80px;
    border-radius: var(--cst-radius-md);
    overflow: hidden;
    background: var(--cst-border);
}

.cst-sidebar-card__thumb {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}

.cst-sidebar-card__body {
    flex: 1;
    min-width: 0;
}

.cst-sidebar-card__title {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--cst-text);
    text-decoration: none;
    line-height: 1.4;
    /* 最多两行 */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--cst-transition);
}

.cst-sidebar-card__title:hover { color: var(--cst-primary); }

/* ================================================================
   右栏：主搜索结果
   ================================================================ */
.cst-main { flex: 1; min-width: 0; }

.cst-main__summary {
    margin-bottom: 16px;
    font-size: 14px;
    color: var(--cst-text-muted);
}

/* ================================================================
   结果卡片列表
   ================================================================ */
.cst-results-list {
    list-style: none;
    margin: 0; padding: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.cst-card {
    display: flex;
    gap: 16px;
    background: var(--cst-surface);
    border: 1px solid var(--cst-border);
    border-radius: var(--cst-radius-lg);
    padding: 20px;
    box-shadow: var(--cst-shadow);
    transition: box-shadow var(--cst-transition), transform var(--cst-transition);
}

.cst-card:hover {
    box-shadow: var(--cst-shadow-hover);
    transform: translateY(-1px);
}

.cst-card__thumb-wrap {
    flex-shrink: 0;
    display: block;
    width: 204px; 
    height: 144px;
    border-radius: var(--cst-radius-md);
    overflow: hidden;
    background: var(--cst-border);
}

.cst-card__thumb {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
}

.cst-card__body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Badge */
.cst-badge {
    display: inline-block;
    align-self: flex-start;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: #fff;
    background: var(--cst-text-muted);
}

.cst-badge--post        { background: var(--cst-badge-post); }
.cst-badge--supplier    { background: var(--cst-badge-supplier); }
.cst-badge--product     { background: var(--cst-badge-product); }
.cst-badge--exhibition  { background: var(--cst-badge-exhibition); }

/* 标题 */
.cst-card__title {
    margin: 0;
    font-size: 17px!important;
    font-weight: 700;
    line-height: 1.35;
    color: var(--cst-text);
}

.cst-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--cst-transition);
}

.cst-card__title a:hover { color: var(--cst-primary); }

/* 摘要 */
.cst-card__excerpt {
    margin: 0;
    font-size: 14px!important;
    color: var(--cst-text-muted);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 底部元信息 */
.cst-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid var(--cst-border);
    font-size: 13px;
}

.cst-card__date { color: var(--cst-text-muted); }

.cst-card__more {
    color: var(--cst-primary);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--cst-transition);
}

.cst-card__more:hover { color: var(--cst-primary-dark); }

/* ================================================================
   分页
   ================================================================ */
.cst-pagination {
    margin-top: 36px;
    display: flex;
    justify-content: center;
}

.cst-pagination__links {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.cst-pagination__btn,
.cst-pagination__ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px; height: 38px;
    padding: 0 10px;
    border-radius: var(--cst-radius-sm);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--cst-border);
    color: var(--cst-text);
    background: var(--cst-surface);
    transition: background var(--cst-transition), color var(--cst-transition);
}

.cst-pagination__btn:hover {
    background: var(--cst-primary);
    color: #fff;
    border-color: var(--cst-primary);
}

.cst-pagination__btn--current {
    background: var(--cst-primary);
    color: #fff;
    border-color: var(--cst-primary);
    pointer-events: none;
}

.cst-pagination__ellipsis {
    border-color: transparent;
    background: transparent;
    pointer-events: none;
    color: var(--cst-text-muted);
}

/* ================================================================
   无结果 / 未输入
   ================================================================ */
.cst-no-results {
    text-align: center;
    padding: 60px 16px;
}

.cst-no-results__msg {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--cst-text);
}

.cst-no-results__tips {
    display: inline-block;
    text-align: left;
    color: var(--cst-text-muted);
    font-size: 14px;
    margin-bottom: 32px;
    padding-left: 20px;
}

.cst-no-results__tips li { margin-bottom: 6px; }

/* ================================================================
   响应式
   ================================================================ */

/* 中等屏幕：左栏收窄 */
@media (max-width: 1100px) {
    :root { --cst-sidebar-width: 240px; }
}

/* 小屏幕：变单栏，左栏移到顶部 */
@media (max-width: 900px) {
    .cst-search-page__columns {
        flex-direction: column;
    }

    .cst-sidebar {
        width: 100%;
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 14px;
    }

    .cst-sidebar__section {
        flex: 1 1 220px;
    }
}

@media (max-width: 768px) {
    .cst-sidebar {
        order: 2;
    }
    .cst-card { flex-direction: column; }

    .cst-card__thumb-wrap {
        width: 100%; height: 180px;
    }

    .cst-card__title { font-size: 15px; }

    .cst-search-page { padding: 16px 12px 40px; }

    .cst-sidebar { flex-direction: column; }

    .cst-search-form__type { font-size: 13px; }
}