/* ========================================
   RS Case Studies - Stylesheet
   ======================================== */

/* ---------- Variables ---------- */
:root {
    --rs-case-blue: #0085D8;
    --rs-case-navy: #0A2F86;
    --rs-case-dark: #333333;
    --rs-case-border: #DDDDDD;
    --rs-case-bg: #EFEFEF;
    --rs-case-card-bg: #EFF1F5;
}

/* ========================================
   [rs_case_list] 分類 + 文章標題列表
   ======================================== */
.rs-case-list {
    display: flex;
    flex-direction: column;
    gap: 70px;
}

/* 每組分類 */
.rs-case-list__group {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 分類標題 - 灰線全寬 + 藍線跟著文字 */
.rs-case-list__cat-header {
    display: flex;
    align-items: flex-end;
    border-bottom: 1px solid var(--rs-case-border);
}

.rs-case-list__cat-title {
    display: inline-block;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--rs-case-blue);
    margin-bottom: -1px; /* 讓藍線疊在灰線上 */
    color: var(--rs-case-dark);
    font-size: 23px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: 2.3px;
}

/* 文章列表 grid */
.rs-case-list__items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* 單一文章項目 */
.rs-case-list__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: var(--rs-case-bg);
    border-radius: 4px;
    text-decoration: none;
    transition: background 0.2s ease, box-shadow 0.2s ease;
    min-height: 52px;
}

.rs-case-list__item:hover {
    background: #e3e3e3;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.rs-case-list__item-text {
    color: var(--rs-case-dark);
    font-size: 18px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    letter-spacing: 0.9px;
    flex: 1;
}

.rs-case-list__item-arrow {
    flex-shrink: 0;
    margin-left: 12px;
    display: flex;
    align-items: center;
}

.rs-case-list__item-arrow svg {
    display: block;
}

/* ========================================
   [rs_case_loop] 文章卡片 Loop
   ======================================== */
.rs-case-loop__container {
    display: flex;
    flex-direction: column;
    gap: 100px;
}

/* 單張卡片 */
.rs-case-card {
    scroll-margin-top: 80px; /* 錨點偏移，避免被 sticky header 蓋住 */
}

.rs-case-card__inner {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--rs-case-card-bg);
    border-radius: 16px;
    min-height: 440px;
    overflow: visible;
}

/* 左側文字區 */
.rs-case-card__content {
    flex: 1 1 50%;
    padding: 40px 60px;
    display: flex;
    flex-direction: column;
    gap: 22px;
    position: relative;
    z-index: 2;
}

/* 「引進事例」標籤 */
.rs-case-card__label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.rs-case-card__label-line {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--rs-case-blue);
}

.rs-case-card__label-text {
    color: var(--rs-case-blue);
    font-size: 16px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 500;
    line-height: 1.3;
}

/* 標題 */
.rs-case-card__title-wrap {
    padding-bottom: 24px;
    border-bottom: 1px solid var(--rs-case-border);
}

.rs-case-card__title {
    color: var(--rs-case-dark);
    font-size: 32px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 700;
    line-height: 1.3;
    margin: 0;
}

/* 摘要 */
.rs-case-card__excerpt {
    color: var(--rs-case-dark);
    font-size: 16px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 400;
    line-height: 1.6;
    letter-spacing: 1.6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 箭頭按鈕 */
.rs-case-card__arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.rs-case-card__arrow:hover {
    transform: translateX(4px);
}

.rs-case-card__arrow svg {
    display: block;
}

/* 右側圖片區 */
.rs-case-card__image-wrap {
    position: relative;
    flex: 0 0 53%;
    min-height: 440px;
    overflow: visible;
    top: -60px;
}

/* 藍色底圖與精選圖 — 永遠等大，底圖只做偏移 */
.rs-case-card__image-bg,
.rs-case-card__image {
    position: absolute;
    width: 90%;
    aspect-ratio: 575 / 357;
    border-radius: 8px;
    transform: rotate(6deg);
    transform-origin: top left;
}

.rs-case-card__image-bg {
    top: 65px;
    left: 63px;
    background: var(--rs-case-blue);
}

.rs-case-card__image {
    top: 27px;
    left: 34px;
    object-fit: cover;
    border-radius: 8px;
}

/* Load More */
.rs-case-loop__more-wrap {
    display: flex;
    justify-content: center;
    margin-top: 80px;
}

.rs-case-loop__more-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 48px;
    border: 2px solid var(--rs-case-blue);
    border-radius: 30px;
    background: transparent;
    color: var(--rs-case-blue);
    font-size: 16px;
    font-family: 'Noto Sans TC', sans-serif;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.25s ease, color 0.25s ease;
}

.rs-case-loop__more-btn:hover {
    background: var(--rs-case-blue);
    color: #fff;
}

.rs-case-loop__more-btn.is-loading {
    pointer-events: none;
    opacity: 0.6;
}

/* ========================================
   RWD - Tablet
   ======================================== */
@media (max-width: 1024px) {
    .rs-case-list__items {
        grid-template-columns: repeat(2, 1fr);
    }

    .rs-case-card__inner {
        min-height: auto;
    }

    .rs-case-card__content {
        padding: 30px 40px;
    }

    .rs-case-card__image-wrap {
        flex: 0 0 50%;
        min-height: 360px;
    }

    .rs-case-card__image-bg {
        top: 50px;
        left: 40px;
    }

    .rs-case-card__image {
        top: 18px;
        left: 14px;
    }
}

/* ========================================
   RWD - 767px 以下共用（列表單欄、字級調整）
   ======================================== */
@media (max-width: 767px) {
    .rs-case-list {
        gap: 40px;
    }

    .rs-case-list__cat-title {
        font-size: 18px;
        letter-spacing: 1.5px;
    }

    .rs-case-list__items {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .rs-case-list__item-text {
        font-size: 16px;
    }

    .rs-case-loop__container {
        gap: 60px;
    }

    .rs-case-card__title-wrap {
        padding-bottom: 16px;
    }

    .rs-case-card__excerpt {
        font-size: 14px;
        letter-spacing: 1px;
    }

    .rs-case-card__arrow {
        width: 48px;
        height: 48px;
    }

    .rs-case-card__arrow svg {
        width: 48px;
        height: 48px;
    }

    .rs-case-loop__more-wrap {
        margin-top: 40px;
    }
}

/* ========================================
   RWD - Small Tablet / Large Mobile (406px ~ 767px)
   上圖下字，圖片置中，卡片往下 50px 避免跟分類重疊
   ======================================== */
@media (max-width: 767px) and (min-width: 406px) {
    .rs-case-card {
        margin-top: 50px;
    }

    .rs-case-card__inner {
        flex-direction: column-reverse;
        border-radius: 12px;
        overflow: visible;
    }

    .rs-case-card__image-wrap {
        position: relative;
        flex: none;
        width: 100%;
        min-height: auto;
        aspect-ratio: 16 / 10;
        overflow: visible;
        top: -40px;
        display: flex;
        justify-content: center;
    }

    .rs-case-card__image-bg,
    .rs-case-card__image {
        width: 80%;
        aspect-ratio: 575 / 357;
        border-radius: 8px;
        transform: rotate(4deg);
        transform-origin: center top;
        /* 用 left/right auto 置中改成 margin 置中 */
        left: auto;
        right: auto;
        margin-left: auto;
        margin-right: auto;
    }

    .rs-case-card__image-bg {
        position: absolute;
        top: 22px;
        left: 12%;
        background: var(--rs-case-blue);
    }

    .rs-case-card__image {
        position: absolute;
        top: 4px;
        left: 9%;
        object-fit: cover;
    }

    .rs-case-card__content {
        position: relative;
        padding: 24px 24px;
        gap: 16px;
    }

    .rs-case-card__title {
        font-size: 24px;
    }
}

/* ========================================
   RWD - Mobile (405px 以下)
   ======================================== */
@media (max-width: 405px) {
    .rs-case-card__inner {
        flex-direction: column-reverse;
        border-radius: 12px;
        overflow: visible;
    }

    .rs-case-card__image-wrap {
        position: relative;
        flex: none;
        width: 100%;
        min-height: auto;
        aspect-ratio: 16 / 10;
        overflow: visible;
        border-radius: 0;
    }

    .rs-case-card__image-bg,
    .rs-case-card__image {
        width: 85%;
        aspect-ratio: 575 / 357;
        transform: rotate(4deg);
        transform-origin: top left;
        border-radius: 8px;
    }

    .rs-case-card__image-bg {
        top: 28px;
        left: 42px;
    }

    .rs-case-card__image {
        top: 8px;
        left: 20px;
    }

    .rs-case-card__content {
        position: relative;
        padding: 24px 20px;
        gap: 16px;
    }

    .rs-case-card__title {
        font-size: 22px;
    }
}

/* ========================================
   RWD - Small Mobile (479px 以下)
   ======================================== */
@media (max-width: 479px) {
    .rs-case-card .rs-case-card__image-wrap {
        top: -30px;
    }

    .rs-case-loop .rs-case-card .rs-case-card__inner {
        margin-top: 30px;
    }

    .rs-case-card .rs-case-card__content {
        top: -20px;
    }
}