:root {
    /* 品牌色系：粉紫、薰衣草紫、白色、柔和粉色 */
    --color-primary: #9b81e5;     /* 主品牌字色 */
    --color-primary-soft: #f4effc; /* 按鈕背景粉紫 */
    --color-primary-hover: #eadef9; /* 按鈕懸停色 */
    --color-bg-base: #f7f5fb;      /* 整體底色 */
    --color-white: #ffffff;
    --color-text-main: #4a3b69;    /* 深紫灰色字體 */
    --color-text-light: #9a8bb6;   /* 輔助灰紫字體 */
    --color-border: #e8e2fa;
    --color-shadow: rgba(155, 129, 229, 0.12); /* 淡淡紫陰影 */

    --border-radius-lg: 24px;
    --border-radius-md: 16px;
    --border-radius-sm: 12px;
    --border-radius-pill: 9999px;

    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Nunito', 'Noto Sans TC', sans-serif;
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* 主背景圖像 */
.bg-decoration {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
    background: url('../assets/background.png') center/cover no-repeat;
}

/* 移除舊有光暈特效保持畫面純淨由圖片主導 */
.glow-orb {
    display: none;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* 陰影公用類別設定 */
.shadow-soft {
    box-shadow: 0 10px 30px var(--color-shadow);
}

/* ====================
   1. Hero 區
==================== */
.hero-section {
    position: relative;
    width: 100%;
}

.hero-composite-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-white);
    overflow: hidden;
    position: relative;
    transition: transform var(--transition-smooth);
}

.hero-composite-card:hover {
    transform: translateY(-2px);
}

.banner-wrapper {
    width: 100%;
    height: 220px;
    position: relative;
    background-color: var(--color-primary-soft);
}

.hero-banner {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.brand-info-wrapper {
    padding: 24px 30px 30px;
    display: flex;
    align-items: center;
    gap: 24px;
    position: relative;
}

.brand-avatar-wrapper {
    flex-shrink: 0;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 4px solid var(--color-white);
    box-shadow: 0 4px 15px var(--color-shadow);
    overflow: hidden;
    background-color: var(--color-bg-base);
    margin-top: -60px; /* 與 banner 上下交疊 */
    position: relative;
    z-index: 2;
}

.brand-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.brand-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.brand-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-main);
    letter-spacing: 0.5px;
}

.social-icons {
    display: flex;
    gap: 12px;
}

.social-icon-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--color-primary-soft);
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-icon-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.social-icon-btn svg {
    width: 18px;
    height: 18px;
}

/* ====================
   2. 主內容區
==================== */
.main-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
}

/* ----------------
   左欄小卡
---------------- */
.left-col {
    display: flex;
    flex-direction: column;
}

.info-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-white);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 24px;
}

.card-actions {
    display: flex;
    gap: 12px;
}

.icon-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--color-text-light);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

.icon-btn svg {
    width: 20px;
    height: 20px;
}

.brand-intro {
    font-size: 0.95rem;
    color: var(--color-text-main);
    white-space: pre-line;
    line-height: 1.8;
}

.powered-by {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 10px;
    opacity: 0.7;
}

/* ----------------
   右欄主按鈕區
---------------- */
.right-col {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.links-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 16px 24px;
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(5px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-pill);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

/* 漸層 hover 背景 */
.link-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.link-btn:hover::before {
    transform: translateX(100%);
}

.link-btn:hover {
    background-color: var(--color-white);
    border-color: var(--color-white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--color-shadow);
}

/* 當按鈕是中文活動時，樣式可以稍微凸顯或保持一致 */
.link-btn.campaign-link {
    background-color: var(--color-primary-soft);
    border-color: transparent;
}

.link-btn.campaign-link:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-3px);
}

/* ----------------
   活動 banner 卡片
---------------- */
.campaign-banner {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    position: relative;
    border: 2px solid var(--color-white);
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.campaign-banner:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 40px var(--color-shadow);
}

.campaign-image-wrapper {
    position: relative;
    width: 100%;
    height: 180px;
}

.campaign-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}



/* ====================
   動畫效果
==================== */
.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

.slide-up {
    opacity: 0;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.2s;
}

.slide-up-delayed {
    opacity: 0;
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.4s;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ====================
   響應式設計 Mobile
==================== */
@media (max-width: 768px) {
    .container {
        padding: 16px;
        gap: 24px;
    }

    .banner-wrapper {
        height: 180px;
    }

    .brand-info-wrapper {
        flex-direction: column;
        text-align: center;
        gap: 12px;
        padding: 0 20px 24px;
    }
    
    .brand-avatar-wrapper {
        margin-top: -45px;
    }

    .social-icons {
        justify-content: center;
        margin-top: 4px;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .info-card {
        position: static;
        order: -1; /* 手機版不確定要放左邊(上)還是右邊(上)。依照原要求「由雙欄改單欄」，預設堆疊是左欄在上。若想保持重點在按鈕，可改order */
    }

    .campaign-image-wrapper {
        height: 150px;
    }
}

/* 隱藏預留區塊 */
.hidden {
    display: none !important;
}

/* ====================
   3. Modal 款式 (QR Code 等)
==================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
    display: flex !important; /* 蓋掉 global hidden 改用 opacity 藏 */
}

.modal-content {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: 32px 24px;
    width: 100%;
    max-width: 320px;
    text-align: center;
    position: relative;
    transform: translateY(0) scale(1);
    transition: transform var(--transition-smooth);
}

.modal.hidden .modal-content {
    transform: translateY(20px) scale(0.95);
}

.close-btn {
    position: absolute;
    top: 12px;
    right: 16px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-light);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.close-btn:hover {
    color: var(--color-primary);
}

.modal-content h3 {
    color: var(--color-text-main);
    margin-bottom: 16px;
    font-size: 1.2rem;
}

.qr-img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin: 0 auto 16px;
    display: block;
    border-radius: var(--border-radius-sm);
}

.modal-content p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ====================
   4. Toast Notification
==================== */
.toast-container {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.toast-container.hidden {
    opacity: 0;
    transform: translate(-50%, 20px);
    pointer-events: none;
    display: block !important;
}

.toast-message {
    background-color: var(--color-text-main);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: var(--border-radius-pill);
    font-size: 0.95rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    display: flex;
    align-items: center;
    gap: 8px;
}