/* ==========================================================================
   突破瓶頸模組 (Bottleneck Module) - CWV Optimized
   ========================================================================== */
.connect-bottleneck-module {
    padding: 100px 0;
    overflow: hidden;
}

/* --- 1. 對立卡片網格 (IT vs OT) --- */
.connect-bottleneck-module .dilemma-grid {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 6rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.connect-bottleneck-module .dilemma-card {
    flex: 1;
    position: relative;
    background: #ffffff;
    border-radius: 16px;
    padding: 2.5rem 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid #f3f4f6;
    text-align: center;
    /* 確保動畫只改變 transform 與 shadow，防禦 CLS 扣分 */
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
    z-index: 1;
    overflow: hidden;
}

.connect-bottleneck-module .dilemma-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
}

/* 卡片微互動：頂部品牌色光暈 */
.connect-bottleneck-module .card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: height 0.3s ease, opacity 0.3s ease;
    opacity: 0.8;
}

.connect-bottleneck-module .it-card .card-glow {
    background: #3b82f6;
    /* IT 藍 */
}

.connect-bottleneck-module .ot-card .card-glow {
    background: #f59e0b;
    /* OT 橘 */
}

.connect-bottleneck-module .dilemma-card:hover .card-glow {
    height: 6px;
    opacity: 1;
}

.connect-bottleneck-module .dilemma-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.connect-bottleneck-module .it-card .dilemma-icon {
    color: #3b82f6;
}

.connect-bottleneck-module .ot-card .dilemma-icon {
    color: #f59e0b;
}

.connect-bottleneck-module .dilemma-role {
    font-size: 1.3rem;
    font-weight: 700;
    color: #111827;
    margin-top: 0;
    margin-bottom: 1rem;
}

.connect-bottleneck-module .dilemma-card p {
    color: #4b5563;
    line-height: 1.7;
    font-size: 1.05rem;
    margin: 0;
}

/* 中央衝突點 (VS) */
.connect-bottleneck-module .dilemma-vs {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 40px;
}

.connect-bottleneck-module .vs-line {
    flex: 1;
    width: 2px;
    background: linear-gradient(to bottom, transparent, #d1d5db, transparent);
}

.connect-bottleneck-module .vs-circle {
    width: 44px;
    height: 44px;
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: #9ca3af;
    margin: 1rem 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

/* --- 2. 滾動高光文字 (Scrollytelling) --- */
.connect-bottleneck-module .scrollytelling-container {
    max-width: 800px;
    margin: 0 auto 6rem auto;
    text-align: center;
}

.connect-bottleneck-module .scrolly-line {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.6;
    margin: 0 0 0.5rem 0;
    /* 預設為極淡的淺灰色，隱身於背景中 */
    color: #d1d5db;
    /* 僅使用 color 過渡，效能極高，絕對不觸發 Layout Reflow */
    transition: color 0.6s ease-out, transform 0.6s ease-out;
    transform: translateY(10px);
}

/* 透過 JS 加入此 class 來觸發高光 */
.connect-bottleneck-module .scrolly-line.is-highlighted {
    color: #111827;
    /* 轉為純黑色突顯 */
    transform: translateY(0);
}

/* 關鍵字特別高光 (針對 POC) */
.connect-bottleneck-module .scrolly-line.is-highlighted:nth-child(2) {
    color: #007b8a;
    /* 痛點核心使用科勝品牌色 */
}

/* --- 3. 解決方案總結卡片 --- */
.connect-bottleneck-module .solution-conclusion {
    background: linear-gradient(135deg, #007b8a 0%, #005f6b 100%);
    border-radius: 16px;
    padding: 3rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    box-shadow: 0 15px 40px rgba(0, 123, 138, 0.2);
    color: #ffffff;
    max-width: 900px;
    margin: 0 auto;
}

.connect-bottleneck-module .solution-icon {
    font-size: 3.5rem;
    color: #ffdc19;
    /* CONNECT 黃色提亮 */
    flex-shrink: 0;
}

.connect-bottleneck-module .solution-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-top: 0;
    margin-bottom: 0.8rem;
}

.connect-bottleneck-module .solution-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

.connect-bottleneck-module .solution-content strong {
    color: #ffdc19;
}

/* --- 4. RWD 手機版防呆微調 --- */
@media (max-width: 991px) {
    .connect-bottleneck-module .dilemma-grid {
        flex-direction: column;
        /* 手機版轉為垂直堆疊 */
        gap: 0;
    }

    .connect-bottleneck-module .dilemma-vs {
        width: 100%;
        height: 60px;
        flex-direction: row;
    }

    .connect-bottleneck-module .vs-line {
        height: 2px;
        width: auto;
        background: linear-gradient(to right, transparent, #d1d5db, transparent);
    }

    .connect-bottleneck-module .vs-circle {
        margin: 0 1rem;
    }

    .connect-bottleneck-module .scrolly-line {
        font-size: 1.4rem;
        /* 手機版字體縮小防溢出 */
        text-align: left;
        /* 手機版長文靠左閱讀性較佳 */
    }

    .connect-bottleneck-module .solution-conclusion {
        flex-direction: column;
        text-align: center;
        padding: 2rem;
    }
}

/* ==========================================================================
   突破瓶頸區塊 - Before & After 對比卡片樣式 (Dark vs Light Theme)
   ========================================================================== */

/* 確保網格垂直置中對齊 */
.connect-bottleneck-module .dilemma-grid.align-items-center {
    align-items: center;
}

/* --- 左側：暗色系卡片 (傳統痛點) --- */
.connect-bottleneck-module .dark-card {
    background: #1f2937;
    /* 科技深灰色，代表傳統的沉重感 */
    border: 1px solid #374151;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.connect-bottleneck-module .dark-card .dilemma-icon {
    color: #fca5a5;
    /* 警告紅，暗示斷線或錯誤 */
}

.connect-bottleneck-module .dark-card .dilemma-role {
    color: #ffffff;
    /* 深色底配純白標題 */
}

.connect-bottleneck-module .dark-card p {
    color: #9ca3af;
    /* 深色底配淺灰內文，降低對比以符合「痛點」的低沉氛圍 */
}

.connect-bottleneck-module .dark-card:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}


/* --- 右側：亮色系卡片 (AI 效益) --- */
.connect-bottleneck-module .light-card {
    background: #ffffff;
    border: 2px solid #ffdc19;
    /* CONNECT 品牌黃邊框，代表解法與明亮 */
    box-shadow: 0 10px 40px rgba(255, 220, 25, 0.12);
    transform: scale(1.02);
    /* 預設微微放大，在視覺層級上「壓制」左側的痛點卡片 */
    z-index: 2;
}

.connect-bottleneck-module .light-card .dilemma-icon {
    color: #ffdc19;
    text-shadow: 0 0 20px rgba(255, 220, 25, 0.4);
    /* AI 晶片的科技發光感 */
}

.connect-bottleneck-module .light-card .dilemma-role {
    color: #111827;
}

.connect-bottleneck-module .light-card p {
    color: #4b5563;
}

.connect-bottleneck-module .light-card:hover {
    transform: scale(1.04) translateY(-5px);
    box-shadow: 0 15px 50px rgba(255, 220, 25, 0.25);
}

/* 手機版 (RWD) 將中央 SVG 箭頭轉向向下 */
@media (max-width: 991px) {
    .connect-bottleneck-module .vs-arrow-svg {
        transform: rotate(90deg);
        /* 手機疊排時，箭頭自動朝下指示流程 */
        transition: transform 0.3s ease;
    }

    .connect-bottleneck-module .light-card {
        transform: none;
        /* 手機版取消預設放大，避免超出螢幕邊界 */
    }

    .connect-bottleneck-module .light-card:hover {
        transform: translateY(-5px);
    }
}