/* ============================================================
 * 卡尼奶主题 · 首页 Hero 头部（全屏 / 通栏）
 * 渐变背景 + 大标题 + 副标题 + 搜索框 + 热门标签 + 彩色快捷入口卡片
 * 作用域限定 .knn-hero，兼顾深色模式 body.dark-mode
 * ============================================================ */

/* 主题缺全局 box-sizing:border-box，须在作用域内自补 */
.knn-hero,
.knn-hero *,
.knn-hero *::before,
.knn-hero *::after {
    box-sizing: border-box;
}

/* ---------- 外壳：渐变背景 ---------- */
.knn-hero {
    position: relative;
    margin-bottom: 20px;
    padding: 54px 24px 46px;
    overflow: hidden;
    border-radius: var(--knn-border-radius, 10px);
    background: linear-gradient(120deg, var(--knn-hero-from, #6a5af9) 0%, var(--knn-hero-to, #4bb8a9) 100%);
    color: #fff;
    text-align: center;
}

/* ---------- 全屏（通栏）：铺满视口宽度、无圆角、内容纵向居中 ---------- */
.knn-hero.knn-hero-full {
    width: 100%;
    margin: 0 0 20px;
    border-radius: 0;
    padding: 52px 16px 30px;
    min-height: var(--knn-hero-h, 430px);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- 背景图模式：图片铺满，叠加遮罩保证文字清晰 ---------- */
.knn-hero.knn-hero-has-bg {
    background: var(--knn-hero-bg) center / cover no-repeat;
}

.knn-hero.knn-hero-has-bg .knn-hero-decor {
    background:
        linear-gradient(120deg, rgba(0, 0, 0, .32) 0%, rgba(0, 0, 0, .46) 100%),
        radial-gradient(circle at 12% 78%, rgba(255, 255, 255, .10), transparent 24%),
        radial-gradient(circle at 88% 22%, rgba(255, 255, 255, .08), transparent 22%);
}

/* 装饰：柔和波纹 / 光斑 */
.knn-hero-decor {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 12% 78%, rgba(255, 255, 255, .18), transparent 22%),
        radial-gradient(circle at 88% 22%, rgba(255, 255, 255, .16), transparent 20%),
        radial-gradient(circle at 78% 92%, rgba(0, 0, 0, .06), transparent 30%);
}

.knn-hero-decor::before,
.knn-hero-decor::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, .08);
}

.knn-hero-decor::before {
    width: 300px;
    height: 300px;
    right: -90px;
    bottom: -140px;
}

.knn-hero-decor::after {
    width: 200px;
    height: 200px;
    left: -80px;
    top: -90px;
    background: rgba(255, 255, 255, .06);
}

/* ---------- 内容容器：卡片行更宽(≈980)，标题/搜索/标签更窄(≤680)，对齐 xuntheme ---------- */
.knn-hero-inner {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 980px;
    margin: 0 auto;
}

.knn-hero-title {
    margin: 0 auto 10px;
    max-width: 680px;
    font-size: 42px;
    font-weight: 800;
    line-height: 1.18;
    color: #fff;
    letter-spacing: .5px;
}

.knn-hero-sub {
    margin: 0 auto 30px;
    max-width: 680px;
    font-size: 17px;
    font-weight: 400;
    color: rgba(255, 255, 255, .88);
}

/* ---------- 搜索框（白色胶囊 + 主色按钮） ---------- */
.knn-hero-search {
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 660px;
    margin: 0 auto 18px;
    padding: 8px 8px 8px 24px;
    background: #fff;
    border-radius: 50px;
    box-shadow: 0 14px 34px rgba(0, 0, 0, .16);
}

.knn-hero-search-input {
    flex: 1;
    min-width: 0;
    height: 44px;
    border: 0;
    outline: none;
    background: transparent;
    font-size: 16px;
    color: #333;
}

.knn-hero-search-input::placeholder {
    color: #9aa0a8;
}

.knn-hero-search-btn {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 46px;
    padding: 0 26px;
    border: 0;
    cursor: pointer;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: var(--knn-color-primary, #007aff);
    transition: filter .2s, transform .2s;
}

.knn-hero-search-btn:hover {
    filter: brightness(1.06);
    transform: translateY(-1px);
}

.knn-hero-search-btn i {
    font-size: 15px;
}

/* ---------- 热门标签 ---------- */
.knn-hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    max-width: 680px;
    margin: 0 auto 40px;
}

.knn-hero-tag {
    display: inline-block;
    padding: 6px 16px;
    font-size: 13px;
    color: #fff;
    text-decoration: none;
    background: rgba(255, 255, 255, .16);
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 30px;
    transition: background .2s, transform .2s;
}

.knn-hero-tag:hover {
    background: rgba(255, 255, 255, .3);
    transform: translateY(-1px);
    color: #fff;
}

/* ---------- 快捷入口卡片 ---------- */
/* ---------- 快捷入口卡片（对齐 xuntheme：紧凑小图标、宽卡片、文字不截断） ---------- */
.knn-hero-cards {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
}

.knn-hero-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    text-decoration: none;
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 12px;
    backdrop-filter: blur(4px);
    transition: background .2s, transform .2s, box-shadow .2s;
}

.knn-hero-card:hover {
    background: rgba(255, 255, 255, .24);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
}

.knn-hero-card-icon {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 9px;
    font-size: 16px;
    color: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, .12);
}

.knn-hero-card-body {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    text-align: left;
}

.knn-hero-card-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.knn-hero-card-sub {
    font-size: 11.5px;
    color: rgba(255, 255, 255, .82);
    line-height: 1.3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 图标颜色预设（渐变方块） */
.knn-hero-c-blue   { background: linear-gradient(135deg, #4f9dff, #2b6fe0); }
.knn-hero-c-green  { background: linear-gradient(135deg, #34d399, #10b981); }
.knn-hero-c-teal   { background: linear-gradient(135deg, #2dd4bf, #0d9488); }
.knn-hero-c-purple { background: linear-gradient(135deg, #a78bfa, #7c3aed); }
.knn-hero-c-orange { background: linear-gradient(135deg, #fbbf24, #f97316); }
.knn-hero-c-red    { background: linear-gradient(135deg, #fb7185, #ef4444); }
.knn-hero-c-pink   { background: linear-gradient(135deg, #f9a8d4, #ec4899); }

/* ---------- 深色模式：整体压暗，文字仍为白 ---------- */
body.dark-mode .knn-hero {
    filter: saturate(.92) brightness(.9);
}

/* 深色模式下搜索框：改为半透明深色玻璃，避免全局 input 深色样式把内框刷黑 */
body.dark-mode .knn-hero .knn-hero-search {
    background: rgba(22, 24, 30, .6);
    box-shadow: 0 14px 34px rgba(0, 0, 0, .4), inset 0 0 0 1px rgba(255, 255, 255, .1);
}

body.dark-mode .knn-hero .knn-hero-search-input {
    background: transparent !important;
    border: 0 !important;
    color: #eef1f6 !important;
    box-shadow: none !important;
}

body.dark-mode .knn-hero .knn-hero-search-input::placeholder {
    color: rgba(238, 241, 246, .55) !important;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1100px) {
    .knn-hero-cards {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .knn-hero.knn-hero-full {
        padding: 40px 16px 30px;
        min-height: var(--knn-hero-h-m, 320px);
    }

    .knn-hero-title {
        font-size: 30px;
    }

    .knn-hero-sub {
        font-size: 15px;
        margin-bottom: 22px;
    }

    .knn-hero-search {
        padding-left: 16px;
    }

    .knn-hero-search-btn span {
        display: none;
    }

    .knn-hero-search-btn {
        padding: 0 16px;
    }

    /* 移动端隐藏快捷入口卡片 */
    .knn-hero-cards {
        display: none;
    }

    .knn-hero-tags {
        margin-bottom: 4px;
    }
}

@media (max-width: 420px) {
    .knn-hero-cards {
        grid-template-columns: 1fr;
    }
}

/* ---------- 设备可见性（配合 knn-device-pc / knn-device-mobile） ---------- */
@media (max-width: 768px) {
    .knn-hero.knn-device-pc {
        display: none;
    }
}

@media (min-width: 769px) {
    .knn-hero.knn-device-mobile {
        display: none;
    }
}