/* ============================================================
   BT Movie Theme - 主样式
   深绿顶栏 + 浅绿三排筛选
   桌面：两列  |  手机：一列
   ============================================================ */

/* === 变量 === */
:root {
    --bt-green:       #2e7d32;
    --bt-green-dark:  #1b5e20;
    --bt-green-light: #4caf50;
    --bt-green-pale:  #f1f8e9;
    --bt-green-line:  #dcedc8;
    --bt-green-text:  #33691e;
    --bt-bg:          #f5f8f5;
    --bt-text:        #183778;
    --bt-text-sub:    #666;
    --bt-border:      #dcedc8;
    --bt-radius:      6px;
    --bt-container:   1200px;
}

/* === 重置 === */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font: 14px/1.6 "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--bt-text);
    background: var(--bt-bg);
}
a { color: inherit; text-decoration: none; }
a:hover { color: var(--bt-green); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; }

/* === 容器 === */
.bt-container {
    width: 100%;
    max-width: var(--bt-container);
    margin: 0 auto;
    padding: 0 16px;
}

/* ============================================================
   头部
   ============================================================ */
.bt-header {
    background: #fff;
    border-bottom: 1px solid var(--bt-green-line);
}

/* ---------- 第一行：深绿顶栏（1200px 居中圆角） ---------- */
.bt-header-top {
    background: var(--bt-green);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
    gap: 16px;
    padding-left: 16px;
    padding-right: 16px;
    border-radius: var(--bt-radius);
    margin-top: 8px;
    margin-bottom: 8px;
    max-width: var(--bt-container);
    width: calc(100% - 32px);
    margin-left: auto;
    margin-right: auto;
}

.bt-logo {
    margin: 0;
    display: flex;
    align-items: center;
    flex: 0 0 auto;              /* 不伸缩，固定宽度 */
}
.bt-logo a {
    display: block;
    line-height: 0;              /* 去掉图片下方间隙 */
}
.bt-logo img {
    display: block;
    height: 40px;                /* ← Logo 显示高度，可调 */
    width: auto;
    max-width: 200px;            /* ← 最宽 200px，防大图撑爆 */
    object-fit: contain;
}

/* ---------- 汉堡按钮（手机端显示） ---------- */
.bt-mobile-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 22px;
    padding: 0;
    border: 0;
    background: none;
    cursor: pointer;
}
.bt-mobile-toggle span {
    display: block;
    height: 3px;
    background: #fff;
    border-radius: 2px;
}

/* ---------- 第一行中间的搜索框（深绿顶栏上） ---------- */
.bt-header-search {
    flex: 1;
    max-width: 460px;
    display: flex;
    align-items: center;
    gap: 0;
    margin: 0 auto;
}

.bt-header-search input[type="search"] {
    flex: 1;
    min-width: 0;
    height: 34px;
    padding: 0 12px;
    border: 2px solid #fff;
    border-right: 0;
    border-radius: 17px 0 0 17px;
    font-size: 13px;
    outline: none;
    background: #fff;
    color: #333;
}
.bt-header-search input[type="search"]:focus {
    border-color: var(--bt-green-pale);
}

.bt-header-search button {
    height: 34px;
    padding: 0 18px;
    border: 2px solid #fff;
    border-left: 0;
    border-radius: 0 17px 17px 0;
    background: #fff;
    color: var(--bt-green);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}
.bt-header-search button:hover {
    background: var(--bt-green-pale);
}

/* ---------- 第一行右侧：登录 / 注册 ---------- */
.bt-header-user {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.bt-user-btn {
    display: inline-block;
    padding: 5px 14px;
    font-size: 13px;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: 17px;
    background: transparent;
    line-height: 1.5;
    white-space: nowrap;
}
.bt-user-btn:hover {
    background: #fff;
    color: var(--bt-green);
    border-color: #fff;
}

.bt-user-register {
    background: #fff;
    color: var(--bt-green);
    border-color: #fff;
}
.bt-user-register:hover {
    background: var(--bt-green-pale);
    border-color: var(--bt-green-pale);
    color: var(--bt-green);
}

.bt-user-logout {
    color: rgba(255,255,255,0.7);
    border-color: rgba(255,255,255,0.4);
}
.bt-user-logout:hover {
    background: #888;
    border-color: #888;
    color: #fff;
}

/* ---------- 通用菜单样式（移动面板用） ---------- */
.bt-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 14px;
}
.bt-menu a {
    display: block;
    padding: 6px 4px;
    color: #333;
    font-size: 14px;
}
.bt-menu a:hover { color: var(--bt-green); }

/* ---------- 移动端菜单面板 ---------- */
.bt-mobile-panel {
    background: #fff;
    border-bottom: 1px solid var(--bt-green-line);
}
.bt-mobile-panel ul { padding: 8px 16px; }
.bt-mobile-panel li a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

/* ============================================================
   筛选栏（类别 / 国家 / 年份）—— 浅绿
   ============================================================ */
.bt-filter-bar {
    background: var(--bt-green-pale);
    border-top: 1px solid var(--bt-green-line);
    font-size: 14px;
}

.bt-filter-row {
    display: flex;
    align-items: flex-start;
    padding: 8px 0;
}

.bt-filter-label {
    flex: 0 0 auto;
    width: auto;
    min-width: 56px;
    color: var(--bt-green);
    font-weight: 700;
    padding: 4px 8px 4px 0;
    white-space: nowrap;
}
.bt-filter-label i {
    font-style: normal;
    color: #7cb342;
    margin-left: 4px;
    font-weight: 400;
}

.bt-filter-items {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 0;
    align-items: center;
}

.bt-filter-item {
    display: inline-block;
    padding: 4px 10px;
    color: var(--bt-green-text);
    border-radius: 3px;
    line-height: 1.6;
    white-space: nowrap;
}
.bt-filter-item:hover {
    background: #e8f5e9;
    color: var(--bt-green);
}

/* ============================================================
   主体
   ============================================================ */
.bt-main { padding: 16px 0; }

/* 公告 */
.bt-notice {
    background: #fffbe6;
    border: 1px solid #f0e0a0;
    color: #b05600;
    border-radius: var(--bt-radius);
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 13px;
}
.bt-notice p { margin: 0; }

/* ============================================================
   搜索区（内容区里的搜索，可选）
   ============================================================ */
.bt-search {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    background: #fff;
    border: 1px solid var(--bt-green-line);
    border-radius: var(--bt-radius);
    padding: 12px;
    margin-bottom: 16px;
    align-items: center;
}
.bt-search-form {
    display: flex;
    align-items: center;
    flex: 1 1 300px;
    gap: 8px;
}
.bt-search-label {
    color: var(--bt-green);
    font-weight: 700;
    white-space: nowrap;
}
.bt-search-form input[type="search"] {
    flex: 1;
    min-width: 0;
    height: 36px;
    padding: 0 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    outline: none;
}
.bt-search-form input[type="search"]:focus { border-color: var(--bt-green); }
.bt-search-form button {
    height: 36px;
    padding: 0 18px;
    background: #ffd400;
    border: 1px solid #f0b800;
    border-radius: 4px;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
}
.bt-search-form button:hover { background: #ffca00; }
.bt-search-extra {
    display: flex;
    gap: 12px;
    font-size: 14px;
    color: var(--bt-green);
    font-weight: 700;
}
.bt-search-extra a {
    padding: 6px 12px;
    border: 1px solid var(--bt-green);
    border-radius: 4px;
    color: var(--bt-green);
}
.bt-search-extra a:hover {
    background: var(--bt-green);
    color: #fff;
}

/* ============================================================
   板块网格：桌面 2 列
   ============================================================ */
.bt-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

/* ============================================================
   单个板块
   ============================================================ */
.bt-block {
    background: #fff;
    border: 1px solid var(--bt-green-line);
    border-radius: var(--bt-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.bt-block-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bt-green-pale);
    border-bottom: 1px solid var(--bt-green-line);
}
.bt-block-title {
    margin: 0;
    font-size: 15px;
    color: var(--bt-green);
}
.bt-block-more {
    font-size: 13px;
    color: var(--bt-text-sub);
}
.bt-block-more:hover { color: var(--bt-green); }

/* ============================================================
   列表
   ============================================================ */
.bt-list { padding: 6px 0; margin: 0; }

.bt-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    font-size: 13px;
    line-height: 1.5;
}
.bt-list-item + .bt-list-item {
    border-top: 1px dashed #eee;
}

.bt-list-link {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #333;
}
.bt-list-link:hover { color: var(--bt-green); }
.bt-score { color: #d32f2f; font-weight: 700; flex: 0 0 auto; }
.bt-year  { color: #888; flex: 0 0 auto; }
.bt-title {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.bt-date { font-size: 12px; flex: 0 0 auto; }
.bt-date-new { color: #d32f2f; }
.bt-date-old { color: #999; }

/* ============================================================
   分页
   ============================================================ */
.bt-pagination,
.navigation.pagination {
    margin: 20px 0;
    text-align: center;
}
.bt-pagination a,
.navigation.pagination a,
.navigation.pagination span {
    display: inline-block;
    margin: 0 3px;
    padding: 6px 12px;
    border: 1px solid var(--bt-green-line);
    border-radius: 4px;
    background: #fff;
    color: var(--bt-text);
    font-size: 13px;
}
.bt-pagination a:hover,
.navigation.pagination a:hover {
    background: var(--bt-green);
    color: #fff;
    border-color: var(--bt-green);
}
.navigation.pagination .current {
    background: var(--bt-green);
    color: #fff;
    border-color: var(--bt-green);
}

/* ============================================================
   单篇文章
   ============================================================ */
.bt-single {
    background: #fff;
    border: 1px solid var(--bt-green-line);
    border-radius: var(--bt-radius);
    padding: 20px;
}
.bt-single-title {
    font-size: 22px;
    color: var(--bt-text);
    margin: 0 0 12px;
}
.bt-single-meta {
    font-size: 13px;
    color: var(--bt-text-sub);
    padding-bottom: 12px;
    border-bottom: 1px solid #eee;
    margin-bottom: 16px;
}
.bt-single-content {
    line-height: 1.8;
    font-size: 15px;
    word-break: break-word;
}
.bt-single-content img { margin: 10px auto; }
.bt-single-content a {
    color: var(--bt-green);
    text-decoration: underline;
}

/* ============================================================
   页脚
   ============================================================ */
.bt-footer {
    background: #fff;
    border-top: 1px solid var(--bt-green-line);
    padding: 16px 0;
    text-align: center;
    font-size: 13px;
    color: #888;
    margin-top: 20px;
}
.bt-footer p { margin: 0 0 6px; }
.bt-footer-tip { font-size: 12px; color: #aaa; }

/* ============================================================
   无障碍：跳转链接
   ============================================================ */
.bt-skip { position: absolute; left: -9999px; }
.bt-skip:focus {
    left: 8px; top: 8px; padding: 6px 10px;
    background: #fff; border: 1px solid #000; z-index: 9999;
}

/* ============================================================
   平板及以上（≥768px）
   ============================================================ */
@media (min-width: 768px) {
    .bt-logo { font-size: 22px; }
    .bt-mobile-toggle { display: none; }
    .bt-mobile-panel { display: none !important; }
}

/* ============================================================
   手机（≤640px）：单列
   ============================================================ */
@media (max-width: 640px) {
    /* 顶栏内边距小一点 */
    .bt-header-top {
        padding-left: 12px;
        padding-right: 12px;
        gap: 10px;
    }

    /* 手机端隐藏中间搜索框 */
    .bt-header-search {
        display: none;
    }

    /* 手机端登录按钮小一点，隐藏注册 */
    .bt-header-user .bt-user-btn {
        padding: 4px 10px;
        font-size: 12px;
    }
    .bt-user-register {
        display: none;
    }

    /* 网格一列 */
    .bt-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    /* 筛选栏 */
    .bt-filter-label { width: 56px; font-size: 13px; }
    .bt-filter-item  { padding: 4px 8px; font-size: 13px; }

    .bt-list-item { font-size: 13px; padding: 7px 12px; }
    .bt-single { padding: 14px; }
    .bt-single-title { font-size: 18px; }
}