/* ============================================
   base/common.css - 所有页面公用的布局骨架
   不含颜色和背景，由 JS 动态注入
   ============================================ */

/* ----- 页面基础 ----- */
body, html {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Roboto, Arial, sans-serif;
    /* 背景由 JS 动态设置，此处不写 */
}

body {
    min-height: 100vh;
    display: flex;
    /* 不加 align-items: center，改用 margin: auto 实现居中 */
    padding: 20px;
    box-sizing: border-box;
}

/* ----- 毛玻璃容器 ----- */
.container {
    /* ===== 关键：用 margin: auto 实现水平和垂直居中 ===== */
    /* 内容少时居中，内容多时自动靠顶，滚动条正常工作 */
    margin: auto;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 2.5rem 3rem;
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.5);
    max-width: 90%;
    animation: fadeIn 1s ease-out;
    box-sizing: border-box;
    /* width 由各页面自己定义覆盖 */
}

/* ----- 淡入动画 ----- */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ----- 通用导航栏（返回按钮） ----- */
.nav-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}
.nav-links a {
    color: #FF9500;  /* 默认 fallback，会被 JS 覆盖 */
    text-decoration: none;
    font-weight: 500;
}
.nav-links a:hover {
    text-decoration: underline;
}

/* ----- 移动端基础适配 ----- */
@media (max-width: 600px) {
    .container {
        padding: 1.5rem;
    }
}

/* ============================================
   浮动面板（工具箱 / 活动导航）
   ============================================ */

   .floating-panel {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 9990;
    display: flex;
    align-items: center;
    font-family: inherit;
    pointer-events: auto;
}
.floating-panel.right { right: 0; flex-direction: row; }
.floating-panel.left  { left: 0;  flex-direction: row-reverse; }

/* ===== 触发器 ===== */
.floating-panel-trigger {
    width: 44px;
    height: 44px;
    background: var(--primary-color, #FF9500);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.3rem;
    line-height: 1;
    box-shadow: 0 0 12px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}
.floating-panel.right .floating-panel-trigger { border-radius: 12px 0 0 12px; }
.floating-panel.left  .floating-panel-trigger { border-radius: 0 12px 12px 0; }
.floating-panel-trigger:hover { transform: scale(1.05); }

/* ===== 展开的面板 ===== */
.floating-panel-body {
    position: absolute;
    top: 50%;
    opacity: 0;
    visibility: hidden;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 14px 18px;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
    white-space: nowrap;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    max-height: min(70vh, 480px);
    overflow-y: auto;
    overflow-x: hidden;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.2) transparent;
    box-sizing: border-box;
}
.floating-panel-body::-webkit-scrollbar { width: 6px; }
.floating-panel-body::-webkit-scrollbar-track { background: transparent; }
.floating-panel-body::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
}
.floating-panel-body::-webkit-scrollbar-thumb:hover {
    background: rgba(0,0,0,0.35);
}

.floating-panel.right .floating-panel-body {
    right: 100%;
    transform: translateY(-50%) translateX(20px);
    border-radius: 16px 0 0 16px;
}
.floating-panel.left .floating-panel-body {
    left: 100%;
    transform: translateY(-50%) translateX(-20px);
    border-radius: 0 16px 16px 0;
}
.floating-panel-body::after {
    content: '';
    position: absolute;
    top: 0;
    width: 20px;
    height: 100%;
}
.floating-panel.right .floating-panel-body::after { left: 100%; }
.floating-panel.left  .floating-panel-body::after { right: 100%; }

.floating-panel:hover .floating-panel-body,
.floating-panel.open .floating-panel-body {
    opacity: 1;
    visibility: visible;
}
.floating-panel.right:hover .floating-panel-body,
.floating-panel.right.open .floating-panel-body {
    transform: translateY(-50%) translateX(0);
}
.floating-panel.left:hover .floating-panel-body,
.floating-panel.left.open .floating-panel-body {
    transform: translateY(-50%) translateX(0);
}

/* ===== 面板里的链接 ===== */
.floating-panel-link {
    color: #333;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 8px;
    transition: background 0.15s, color 0.15s;
    text-align: left;
    white-space: nowrap;
}
.floating-panel-link:hover {
    background: rgba(255, 149, 0, 0.12);
    color: var(--primary-color, #FF9500);
}
.floating-panel-link.disabled {
    color: #ccc;
    cursor: default;
    pointer-events: none;
}

@media (hover: none) {
    .floating-panel:hover .floating-panel-body {
        opacity: 0;
        visibility: hidden;
    }
    .floating-panel.open .floating-panel-body {
        opacity: 1;
        visibility: visible;
    }
}
@media (max-width: 600px) {
    .floating-panel-trigger { width: 38px; height: 38px; font-size: 1.1rem; }
    .floating-panel-link { font-size: 0.85rem; padding: 5px 8px; }
    .floating-panel-body { max-height: min(60vh, 380px); }
}