/* =========================================================================
   🎨 前台触发按钮（保持美观渐变）
   ========================================================================= */
.secure-pdf-trigger-btn {
    background: linear-gradient(135deg, #ff4e50, #f9d423) !important;
    color: white !important; border: none !important; padding: 12px 24px !important; 
    font-size: 16px !important; font-weight: bold !important; border-radius: 30px !important;
    cursor: pointer !important; box-shadow: 0 4px 15px rgba(0,0,0,0.15) !important; 
    transition: all 0.3s ease !important; display: inline-flex !important; 
    align-items: center !important; text-decoration: none !important;
}
.secure-pdf-trigger-btn:hover { transform: translateY(-2px) !important; box-shadow: 0 6px 20px rgba(0,0,0,0.2) !important; }

/* =========================================================================
   🔒 强力隔离：全屏独立灯箱（不受任何 WordPress 主题和 Header/Footer 干扰）
   ========================================================================= */

/* 灯箱最外层：死死钉在屏幕最上层，全黑背景 */
.spv-lightbox-overlay {
    display: none; 
    position: fixed !important;
    top: 0 !important; left: 0 !important; 
    width: 100vw !important; height: 100vh !important;
    background: rgba(15, 15, 15, 0.98) !important; /* 极深色背景，突出 PDF */
    z-index: 2147483647 !important; /* 最高的 z-index，盖过主题一切 Header/Footer */
    overflow: hidden !important;
    box-sizing: border-box !important;
}

/* 内部核心包裹容器：继承全屏 */
.spv-lightbox-overlay .secure-pdf-container {
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    max-height: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    background: transparent !important;
    position: relative !important;
    box-sizing: border-box !important;
}

/* 顶部工具栏：强制固定在最上方，横向铺满 */
.pdf-toolbar {
    width: 100% !important;
    height: 60px !important;
    background: #1a1a1a !important;
    color: #ffffff !important;
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 0 25px !important;
    box-sizing: border-box !important;
    border-bottom: 1px solid #333 !important;
    flex-shrink: 0 !important; /* 绝不压缩工具栏 */
}

.pdf-toolbar button {
    background: #ff4e50 !important; color: white !important; border: none !important;
    padding: 8px 16px !important; border-radius: 4px !important; cursor: pointer !important;
    font-size: 14px !important; font-weight: bold !important; transition: background 0.2s !important;
}
.pdf-toolbar button:hover { background: #e04345 !important; }
.page-info { font-size: 14px !important; color: #ccc !important; font-family: sans-serif !important; }

/* 关闭按钮：大而明显 */
.spv-lightbox-close {
    color: #aaa !important; font-size: 32px !important; font-weight: bold !important;
    cursor: pointer !important; line-height: 1 !important; transition: color 0.2s !important;
}
.spv-lightbox-close:hover { color: #ff4e50 !important; }

/* =========================================================================
   📜 画布视窗层：真正的滚动主角
   ========================================================================= */
.pdf-canvas-wrapper {
    width: 100% !important;
    flex: 1 !important; /* 自动撑满除工具栏外的所有屏幕空间 */
    overflow-y: auto !important; /* 允许纵向滚动查看长图 */
    overflow-x: hidden !important; /* 杜绝横向错位 */
    background: #2d2d2d !important; /* 画布背后的暗色看台 */
    padding: 30px 10px !important; /* 上下留白，更有画册高级感 */
    box-sizing: border-box !important;
    -webkit-overflow-scrolling: touch !important; /* 优化手机丝滑滚动 */
}

/* 核心：Canvas 必须在其父级内完美自适应 */
.pdf-render, #pdf-render {
    display: block !important;
    width: 100% !important;
    max-width: 850px !important; /* 电脑端最佳阅读宽度 */
    height: auto !important;
    margin: 0 auto !important; /* 居中 */
    box-shadow: 0 10px 30px rgba(0,0,0,0.5) !important; /* 纸张立体边缘阴影 */
    background: #ffffff !important;
}

/* ✅ 修正了这里的左括号语法：在大屏幕上（桌面端）留出更舒适的空间 */
@media (min-width: 992px) {
    .pdf-canvas-wrapper { padding: 40px 20px !important; }
}

/* 配合 JS 彻底锁死网页主体滚动 */
body.spv-viewer-active {
    overflow: hidden !important;
    height: 100vh !important;
    position: fixed !important;
    width: 100vw !important;
}

/* 🔒 强制最高物理防打印 */
@media print {
    body *, .spv-lightbox-overlay, .secure-pdf-container, .pdf-render, #pdf-render { display: none !important; }
}