/* ====== AI导航首页 ====== */
.landing { max-width: 1200px; margin: 0 auto; }
.landing * { box-sizing: border-box; }

/* ---- 顶部搜索区 ---- */
.landing-hero {
    max-width: 1500px; margin: 0 auto; padding: 48px 24px 28px;
    text-align: center;
}
.landing-hero__title {
    font-size: clamp(22px, 5vw, 38px); font-weight: 800;
    letter-spacing: -.5px; margin: 0 0 8px; color: var(--text-primary);
    line-height: 1.25;
}
.landing-hero__desc { font-size: 15px; color: var(--text-tertiary); margin: 0 0 24px; }
.landing-hero__search { max-width: 640px; margin: 0 auto; width: 100%; }

.landing-search-tabs {
    display: inline-flex; justify-content: center; gap: 2px; margin-bottom: 14px;
    background: var(--bg-hover); border-radius: 8px; padding: 3px; flex-wrap: wrap;
}
.landing-search-tab {
    padding: 7px 20px; border-radius: 6px; font-size: 13px; font-weight: 500;
    cursor: pointer; border: none; background: transparent; color: var(--text-muted); transition: all .2s;
}
.landing-search-tab:hover { color: var(--text-secondary); }
.landing-search-tab--active {
    background: var(--bg-card); color: var(--color-link);
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

.landing-search-wrap { position: relative; width: 100%; }
.landing-search-input {
    width: 100%; height: 54px; border-radius: 13px; border: 1.5px solid var(--border-input);
    background: var(--bg-card); font-size: 16px; padding: 0 56px 0 24px; outline: none;
    transition: all .2s; box-shadow: 0 2px 8px rgba(0,0,0,.04); color: var(--text-primary);
}
.landing-search-input:focus {
    border-color: var(--theme-color, #2563eb);
    box-shadow: 0 0 0 4px rgba(37,99,235,.06), 0 2px 8px rgba(0,0,0,.04);
}
.landing-search-input::placeholder { color: var(--border-hover); }
.landing-search-btn {
    position: absolute; right: 7px; top: 50%; transform: translateY(-50%);
    width: 40px; height: 40px; border-radius: 10px; border: none;
    background: var(--theme-color, #2563eb); color: #fff; cursor: pointer;
    display: flex; align-items: center; justify-content: center; transition: all .2s;
}
.landing-search-btn:hover { opacity: .92; box-shadow: 0 4px 16px rgba(37,99,235,.3); }

.landing-hero__divider { max-width: 1500px; margin: 0 auto; padding: 0 24px; }
.landing-hero__divider::after {
    content: ''; display: block; height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-input) 20%, var(--border-input) 80%, transparent);
}

/* ---- 下方内容区 ---- */
.landing-body { display: flex; max-width: 1500px; margin: 0 auto; padding: 28px 24px 60px; gap: 28px; }

/* ---- 左侧边栏 ---- */
.landing-sidebar {
    width: 100px !important; min-width: 100px !important; max-width: 100px !important; flex-shrink: 0;
    position: sticky; top: 28px; height: fit-content;
    max-height: calc(100vh - 56px); overflow-y: auto;
    scrollbar-width: thin; scrollbar-color: var(--border-input) transparent;
}
.landing-sidebar::-webkit-scrollbar { width: 4px; }
.landing-sidebar::-webkit-scrollbar-track { background: transparent; }
.landing-sidebar::-webkit-scrollbar-thumb { background: var(--border-input); border-radius: 4px; }

.landing-sidebar__title {
    font-size: 16px; font-weight: 700; color: var(--text-primary);
    margin: 0 0 14px; text-align: center;
}
.landing-sidebar__list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.landing-sidebar__link {
    display: block; padding: 8px; font-size: 14px; color: var(--text-tertiary);
    text-decoration: none; border-radius: var(--border-radius-sm); transition: all .2s;
    line-height: 1.4; cursor: pointer; border-left: 3px solid transparent;
}
.landing-sidebar__link:hover {
    background: var(--bg-secondary); color: var(--text-primary); border-left-color: var(--border-hover);
}
.landing-sidebar__link--active {
    background: var(--bg-hover); color: var(--theme-color, #2563eb); font-weight: 600;
    border-left-color: var(--theme-color, #2563eb);
}

/* ---- 右侧主区 ---- */
.landing-main { flex: 1; min-width: 0; }

/* ---- 分类分组 ---- */
.landing-group { margin-bottom: 48px; }
.landing-group:last-child { margin-bottom: 0; }
.landing-group__header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 4px; }
.landing-group__title {
    font-size: 24px; font-weight: 700; color: var(--caption-color, var(--text-primary));
    margin: 0; line-height: 1.3;
}
.landing-group__actions { display: flex; gap: 10px; flex-shrink: 0; align-items: center; }
.landing-group__action-link {
    font-size: 13px; color: var(--text-muted); text-decoration: none; cursor: pointer;
    display: flex; align-items: center; gap: 2px; transition: color .15s;
}
.landing-group__action-link:hover { color: var(--theme-color, #2563eb); }

/* ---- 网址卡片网格 ---- */
.landing-cards-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.landing-card {
    display: flex; align-items: center; gap: 12px;
    padding: 14px 16px; background: var(--bg-card); border: 1px solid var(--border-secondary);
    border-radius: var(--border-radius); transition: all .2s ease; cursor: pointer;
    min-width: 0; box-sizing: border-box;
}
.landing-card:hover {
    border-color: var(--theme-color, #2563eb);
    box-shadow: 0 4px 16px rgba(37,99,235,.08); transform: translateY(-1px);
}
.landing-card__icon {
    flex-shrink: 0; width: 42px; height: 42px; border-radius: 10px;
    overflow: hidden; background: var(--bg-hover);
    display: flex; align-items: center; justify-content: center;
}
.landing-card__icon img { width: 100%; height: 100%; object-fit: cover; border-radius: 10px; }
.landing-card__icon-fallback { font-size: 18px; font-weight: 700; color: var(--text-muted); }
.landing-card__info { flex: 1; min-width: 0; }
.landing-card__name {
    font-size: 13px; font-weight: 600; color: var(--text-primary);
    margin: 0 0 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.landing-card__desc {
    font-size: 11px; color: var(--text-muted); line-height: 1.4;
    overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}

/* ---- 卡片网格响应式 ---- */
@media (max-width: 1400px) {
    .landing-cards-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
@media (max-width: 1080px) {
    .landing-cards-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---- 平板/小屏 ---- */
@media (max-width: 900px) {
    .landing-body { flex-direction: column; padding: 20px 16px 40px; }
    .landing-sidebar {
        width: 100% !important; min-width: unset !important; max-width: unset !important;
        position: static; max-height: none; order: -1;
        display: flex; overflow-x: auto; gap: 4px; padding-bottom: 12px;
        -ms-overflow-style: none; scrollbar-width: none;
    }
    .landing-sidebar::-webkit-scrollbar { display: none; }
    .landing-sidebar__title { display: none; }
    .landing-sidebar__list { display: flex; gap: 4px; flex-wrap: nowrap; }
    .landing-sidebar__link { white-space: nowrap; padding: 7px 14px; font-size: 12px; border-left: none; }
    .landing-sidebar__link--active { border-left: none; }
    .landing-cards-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---- 手机端（由 sites-home.php 内联样式主导，此处做兜底） ---- */
@media (max-width: 700px) {
    .landing-sidebar { display: none; }
    .landing-cards-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .landing-hero { padding: 32px 16px 24px; }
    .landing-hero__title { font-size: clamp(20px, 6vw, 28px); }
    .landing-hero__desc { font-size: 14px; margin-bottom: 18px; }
    .landing-hero__divider { padding: 0 16px; }
    .landing-card {
        padding: 12px 11px; gap: 10px; border-radius: 12px;
        box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.03);
    }
    .landing-card__icon { width: 44px; height: 44px; border-radius: 10px; }
    .landing-card__name { font-size: 13px; }
    .landing-card__desc { font-size: 11px; }
    .landing-group { margin-bottom: 32px; }
    .landing-group__title { font-size: 20px; }
}

/* ====== 热门推荐模块 ====== */
.landing-hot { max-width: 1500px; margin: 0 auto; padding: 28px 24px 48px; }
.landing-hot__header { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.landing-hot__title {
    font-size: 22px; font-weight: 700; color: var(--caption-color, var(--text-primary));
    margin: 0; line-height: 1.3; white-space: nowrap;
}
.landing-hot__tabs { display: inline-flex; gap: 0; align-items: center; background: var(--bg-hover); border-radius: 8px; padding: 3px; }
.landing-hot__tab {
    padding: 6px 18px; border-radius: 6px; border: none;
    background: transparent; font-size: 13px; font-weight: 500; color: var(--text-muted); cursor: pointer;
    transition: all .2s; white-space: nowrap;
}
.landing-hot__tab:hover { color: var(--text-secondary); }
.landing-hot__tab--active {
    background: var(--bg-card); color: var(--theme-color, #2563eb);
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
}

.landing-hot-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 14px; transition: opacity .2s ease; }
.landing-hot-card {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 14px; background: var(--bg-card); border: 1px solid var(--border-secondary);
    border-radius: var(--border-radius); cursor: pointer;
    transition: all .2s ease; min-width: 0;
}
.landing-hot-card:hover {
    border-color: var(--theme-color, #2563eb);
    box-shadow: 0 4px 16px rgba(37,99,235,.08); transform: translateY(-1px);
}
.landing-hot-card__icon {
    flex-shrink: 0; width: 38px; height: 38px; border-radius: 8px;
    overflow: hidden; background: var(--bg-hover);
    display: flex; align-items: center; justify-content: center;
}
.landing-hot-card__icon img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.landing-hot-card__icon-fallback { font-size: 17px; font-weight: 700; color: var(--text-muted); }
.landing-hot-card__info { flex: 1; min-width: 0; overflow: hidden; }
.landing-hot-card__name {
    font-size: 13px; font-weight: 600; color: var(--text-primary);
    margin: 0 0 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.landing-hot-card__desc {
    font-size: 11px; color: var(--text-muted); line-height: 1.45;
    overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
}

/* 热门模块响应式 */
@media (max-width: 1200px) { .landing-hot-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 900px) { .landing-hot-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 700px) {
    .landing-hot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .landing-hot__header { flex-wrap: wrap; gap: 12px; }
    .landing-hot__title { font-size: 18px; line-height: 1.25; white-space: normal; word-break: break-word; }
    .landing-hot-card {
        padding: 12px 11px; gap: 10px; border-radius: 12px;
        box-shadow: 0 1px 3px rgba(0,0,0,.04), 0 4px 12px rgba(0,0,0,.03);
    }
    .landing-hot-card__icon { width: 44px; height: 44px; border-radius: 10px; }
    .landing-hot-card__name { font-size: 13px; }
    .landing-hot-card__desc { font-size: 11px; }
}
@media (max-width: 420px) {
    .landing-hot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
    .landing-hot-card { padding: 11px 9px; gap: 8px; border-radius: 10px; }
    .landing-hot-card__icon { width: 40px; height: 40px; border-radius: 9px; }
    .landing-hot-card__name { font-size: 12.5px; }
    .landing-hot-card__desc { font-size: 11px; -webkit-line-clamp: 1; }
}

/* ====== 文章资讯模块 ====== */
.landing-news { padding: 48px 24px 60px; border-top: 1px solid var(--border-secondary); }
.landing-news__inner { max-width: 1500px; margin: 0 auto; }
.landing-news__header { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.landing-news__title {
    font-size: 22px; font-weight: 700; color: var(--caption-color, var(--text-primary));
    margin: 0; line-height: 1.3;
}
.landing-news__more {
    font-size: 13px; color: var(--text-muted); text-decoration: none; cursor: pointer;
    display: flex; align-items: center; gap: 2px; transition: color .15s; white-space: nowrap; flex-shrink: 0;
}
.landing-news__more:hover { color: var(--theme-color, #2563eb); }
.landing-news__subtitle { font-size: 13px; color: var(--text-muted); margin: 0 0 20px; }

.landing-news-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 16px; }
.landing-news-card {
    display: block; background: var(--bg-card); border: 1px solid var(--border-secondary);
    border-radius: var(--border-radius); overflow: hidden; text-decoration: none;
    transition: all .2s ease; cursor: pointer;
}
.landing-news-card:hover {
    border-color: var(--theme-color, #2563eb);
    box-shadow: 0 4px 16px rgba(37,99,235,.08); transform: translateY(-2px);
}
.landing-news-card__thumb { width: 100%; height: 140px; overflow: hidden; position: relative; background: var(--bg-hover); }
.landing-news-card__thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.landing-news-card:hover .landing-news-card__thumb img { transform: scale(1.05); }
.landing-news-card__date {
    position: absolute; right: 8px; bottom: 8px;
    padding: 2px 8px; border-radius: 6px; background: var(--bg-card);
    backdrop-filter: blur(4px); font-size: 11px; color: var(--text-secondary);
    display: flex; align-items: center; gap: 4px; white-space: nowrap;
}
.landing-news-card__body { padding: 12px 14px 14px; min-width: 0; }
.landing-news-card__title {
    font-size: 14px; font-weight: 600; color: var(--text-primary); line-height: 1.45;
    margin: 0 0 6px; display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden; word-break: break-all;
}
.landing-news-card__excerpt {
    font-size: 12px; color: var(--text-muted); line-height: 1.55;
    margin: 0 0 10px; display: -webkit-box; -webkit-line-clamp: 2;
    -webkit-box-orient: vertical; overflow: hidden; word-break: break-all;
}
.landing-news-card__tags { display: flex; flex-wrap: nowrap; gap: 4px; overflow: hidden; }
.landing-news-card__tag {
    padding: 2px 8px; border-radius: 4px; border: 1px solid var(--border-input);
    background: var(--bg-card); font-size: 11px; color: var(--text-secondary);
    text-decoration: none; transition: all .12s; white-space: nowrap; flex-shrink: 0;
}
.landing-news-card__tag:hover { color: var(--theme-color, #2563eb); border-color: var(--border-hover); }

/* 资讯响应式 */
@media (max-width: 1200px) { .landing-news-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 900px) { .landing-news-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 700px) {
    .landing-news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .landing-news-card { border-radius: 14px; box-shadow: 0 1px 3px rgba(0,0,0,.04); }
    .landing-news-card__thumb { height: 160px; border-radius: 14px 14px 0 0; }
    .landing-news-card__body { padding: 14px 14px 16px; }
    .landing-news-card__title { font-size: 15px; }
    .landing-news-card__excerpt { display: none; }
    .landing-news-card__tag { font-size: 12px; padding: 3px 10px; }
    .landing-news__header { flex-direction: column; align-items: flex-start; }
    .landing-news__title { font-size: 18px; }
    .landing-news__subtitle { font-size: 12px; margin-bottom: 14px; }
    .landing-news__more { font-size: 12px; }
    .landing-group__title { font-size: 20px; }
}
@media (max-width: 420px) {
    .landing-news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
    .landing-news-card__thumb { height: 140px; }
    .landing-news-card__body { padding: 12px 10px 12px; }
    .landing-news-card__title { font-size: 14px; }
    .landing-news__title { font-size: 16px; }
    .landing-news__subtitle { font-size: 11px; }
    .landing-news__more { font-size: 11px; }
}