/* 与大王的TodoList - 移动端美学设计优化 */

/* ========== B站配色方案（优化版）========== */
:root {
    --bili-primary: #FB7299;           /* B站主色 - 粉色 */
    --bili-primary-hover: #FF85AD;     /* 悬停色 */
    --bili-primary-dark: #E85C8A;      /* 深色 */
    --bili-primary-light: #FFF0F5;     /* 浅粉色 */
    --bili-bg: #F4F4F5;                /* 背景色 */
    --bili-bg-secondary: #FFFFFF;      /* 次要背景 */
    --bili-text: #18191C;              /* 主文本 */
    --bili-text-secondary: #9499A0;    /* 次要文本 */
    --bili-text-tertiary: #C8CCD0;     /* 三级文本 */
    --bili-border: #E3E8ED;            /* 边框色 */
    --bili-border-light: #F0F1F2;      /* 浅边框 */
    --bili-success: #00D9FF;           /* 成功色 */
    --bili-success-light: #E0F7FA;     /* 成功浅色 */
    --bili-warning: #FFB800;            /* 警告色 */
    --bili-danger: #FF6699;             /* 危险色 */
    
    /* 间距系统（8px基础单位）*/
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    
    /* 圆角系统 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 阴影系统 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* ========== Tailwind工具类增强 ========== */
.bg-bili-primary { background-color: var(--bili-primary) !important; }
.bg-bili-primary-hover:hover { background-color: var(--bili-primary-hover) !important; }
.bg-bili-primary-dark { background-color: var(--bili-primary-dark) !important; }
.bg-bili-primary-light { background-color: var(--bili-primary-light) !important; }
.bg-bili-bg { background-color: var(--bili-bg) !important; }
.bg-bili-bg-secondary { background-color: var(--bili-bg-secondary) !important; }
.text-bili-text { color: var(--bili-text) !important; }
.text-bili-text-secondary { color: var(--bili-text-secondary) !important; }
.text-bili-text-tertiary { color: var(--bili-text-tertiary) !important; }
.text-bili-primary { color: var(--bili-primary) !important; }
.border-bili-border { border-color: var(--bili-border) !important; }
.border-bili-border-light { border-color: var(--bili-border-light) !important; }

/* ========== 基础重置 ========== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--bili-bg);
    color: var(--bili-text);
    font-size: 15px;
    line-height: 1.6;
    min-width: 320px;
    max-width: 100vw;
    overflow-x: hidden;
    padding-bottom: env(safe-area-inset-bottom);
}

/* 登录页面禁止滚动 */
body.login-page {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100%;
    touch-action: none;
    -webkit-overflow-scrolling: none;
}

.login-container {
    height: 100vh;
    height: 100dvh; /* 动态视口高度，适配移动端浏览器 */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
    position: relative;
}

.login-container > div {
    width: 100%;
    max-width: 400px;
    transform-origin: center center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/* ========== 移动端优化 ========== */
@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
}

/* ========== 导航栏（优化）========== */
.navbar {
    background: var(--bili-bg-secondary);
    border-bottom: 1px solid var(--bili-border-light);
    padding: var(--spacing-md) var(--spacing-lg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

/* ========== 统计卡片（优化）========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: var(--bili-bg-secondary);
    margin-bottom: var(--spacing-sm);
}

.stat-card {
    background: var(--bili-bg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    transition: all 0.2s ease;
}

.stat-card:active {
    transform: scale(0.98);
    background: var(--bili-border-light);
}

.stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--bili-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--bili-text-secondary);
    line-height: 1.3;
}

/* ========== 筛选栏（优化）========== */
.filter-bar {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bili-bg-secondary);
    margin-bottom: var(--spacing-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar {
    display: none;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid var(--bili-border);
    background: var(--bili-bg-secondary);
    color: var(--bili-text-secondary);
    white-space: nowrap;
    transition: all 0.2s ease;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-btn.active {
    background: var(--bili-primary);
    color: white;
    border-color: var(--bili-primary);
    box-shadow: 0 2px 4px rgba(251, 114, 153, 0.2);
}

.filter-btn:active {
    transform: scale(0.95);
}

/* ========== 任务列表（优化）========== */
.tasks-container {
    padding: 0 var(--spacing-lg) var(--spacing-xl);
    padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom));
}

.task-item {
    background: var(--bili-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--bili-border-light);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.task-item:active {
    transform: scale(0.98);
    box-shadow: var(--shadow-md);
}

.task-item.completed {
    background: var(--bili-success-light);
    border-color: rgba(0, 217, 255, 0.2);
}

.task-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.task-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 18px;
    box-shadow: var(--shadow-sm);
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--bili-text);
    margin-bottom: var(--spacing-xs);
    word-break: break-word;
    line-height: 1.4;
}

.task-title.completed {
    color: var(--bili-text);
    opacity: 1;
}

.task-title.completed::after {
    content: ' ✓';
    color: #00D9FF;
    font-weight: bold;
    margin-left: 6px;
    font-size: 18px;
}

.task-description {
    font-size: 13px;
    color: var(--bili-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
    word-break: break-word;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.task-type-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 11px;
    font-weight: 500;
    border-radius: var(--radius-full);
    background: var(--bili-bg);
    color: var(--bili-text-secondary);
}

.task-priority {
    font-size: 12px;
    color: var(--bili-warning);
    letter-spacing: 1px;
}

.task-status {
    font-size: 11px;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.task-status.completed {
    background: rgba(0, 217, 255, 0.1);
    color: var(--bili-success);
}

.task-status.pending {
    background: rgba(255, 184, 0, 0.1);
    color: var(--bili-warning);
}

.task-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--bili-border-light);
}

.task-action-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    border: none;
    background: var(--bili-bg);
    color: var(--bili-text-secondary);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    flex: 1;
}

.task-action-btn:active {
    transform: scale(0.95);
    background: var(--bili-border);
}

.task-action-btn.complete {
    color: var(--bili-success);
}

.task-action-btn.complete:active {
    background: rgba(0, 217, 255, 0.1);
}

.task-action-btn.edit {
    color: var(--bili-primary);
}

.task-action-btn.edit:active {
    background: var(--bili-primary-light);
}

.task-action-btn.delete {
    color: var(--bili-danger);
}

.task-action-btn.delete:active {
    background: rgba(255, 102, 153, 0.1);
}

/* ========== 任务图片（朋友圈式布局）========== */
.task-images-container {
    display: grid;
    gap: 4px;
    margin-top: var(--spacing-md);
    border-radius: var(--radius-md);
    overflow: hidden;
}

/* 1张图片：大图显示（朋友圈逻辑） */
.task-images-container.image-count-1 {
    grid-template-columns: 1fr;
    max-width: 280px;
}

.task-images-container.image-count-1 .task-image-item {
    width: 100%;
    aspect-ratio: 1;
    max-height: 400px;
}

/* 2-4张图片：2列网格（朋友圈逻辑） */
.task-images-container.image-count-2,
.task-images-container.image-count-3,
.task-images-container.image-count-4 {
    grid-template-columns: repeat(2, 1fr);
    max-width: 280px;
}

.task-images-container.image-count-2 .task-image-item,
.task-images-container.image-count-3 .task-image-item,
.task-images-container.image-count-4 .task-image-item {
    aspect-ratio: 1;
}

/* 4张图片特殊处理：第一张占2列 */
.task-images-container.image-count-4 {
    grid-template-columns: repeat(2, 1fr);
}

.task-images-container.image-count-4 .task-image-item:first-child {
    grid-column: 1 / -1;
    aspect-ratio: 2 / 1;
}

/* 5-9张图片：3列网格（9宫格，朋友圈逻辑） */
.task-images-container.image-count-5,
.task-images-container.image-count-6,
.task-images-container.image-count-7,
.task-images-container.image-count-8,
.task-images-container.image-count-9 {
    grid-template-columns: repeat(3, 1fr);
    max-width: 280px;
}

.task-images-container.image-count-5 .task-image-item,
.task-images-container.image-count-6 .task-image-item,
.task-images-container.image-count-7 .task-image-item,
.task-images-container.image-count-8 .task-image-item,
.task-images-container.image-count-9 .task-image-item {
    aspect-ratio: 1;
}

.task-image-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s ease;
    background: var(--bili-bg);
}

.task-image-item:active {
    transform: scale(0.98);
}

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

/* 图片预览容器 */
.image-preview-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.image-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bili-bg);
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.image-preview-remove:active {
    transform: scale(0.9);
    background: rgba(0, 0, 0, 0.8);
}

/* ========== 已有图片管理（编辑时）========== */
.existing-images-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--bili-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--bili-border-light);
}

.existing-image-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bili-bg-secondary);
    border: 1px solid var(--bili-border-light);
}

.existing-image-item.marked-delete {
    opacity: 0.5;
    border: 2px solid var(--bili-error);
}

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

.existing-image-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 102, 153, 0.9);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    z-index: 10;
}

.existing-image-remove:active {
    transform: scale(0.9);
    background: rgba(255, 102, 153, 1);
}

/* ========== 图片查看器（朋友圈式）========== */
.image-viewer-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.image-viewer-overlay.hidden {
    display: none;
}

.image-viewer-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 10;
}

.image-viewer-counter {
    color: white;
    font-size: 16px;
    font-weight: 500;
}

.image-viewer-close {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 18px;
}

.image-viewer-close:active {
    transform: scale(0.9);
    background: rgba(255, 255, 255, 0.3);
}

.image-viewer-content {
    flex: 1;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 60px 0;
}

.image-viewer-main {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
}

.image-viewer-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    user-select: none;
    -webkit-user-select: none;
    touch-action: pan-y;
    will-change: transform, opacity;
}

.image-viewer-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 20px;
    z-index: 10;
}

.image-viewer-nav:active {
    transform: translateY(-50%) scale(0.9);
    background: rgba(255, 255, 255, 0.3);
}

.image-viewer-prev {
    left: var(--spacing-lg);
}

.image-viewer-next {
    right: var(--spacing-lg);
}

.image-viewer-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-lg);
    display: flex;
    justify-content: center;
    z-index: 10;
}

.image-viewer-download {
    padding: var(--spacing-md) var(--spacing-xl);
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

.image-viewer-download:active {
    transform: scale(0.95);
    background: rgba(255, 255, 255, 0.3);
}

/* ========== 模态框（优化）========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    display: flex;
    align-items: flex-end;
    padding: 0;
    backdrop-filter: blur(4px);
}

/* 验证码模态框始终在最前面 */
#verificationModal {
    z-index: 10000 !important;
}

.modal-overlay.hidden {
    display: none;
}

.modal-content {
    background: var(--bili-bg-secondary);
    width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    padding: 0;
    overflow-y: auto;
    animation: slideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
}

@keyframes slideUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--bili-border-light);
    position: sticky;
    top: 0;
    background: var(--bili-bg-secondary);
    z-index: 10;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--bili-text);
}

.modal-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--bili-bg);
    border-radius: var(--radius-md);
    color: var(--bili-text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-close:active {
    transform: scale(0.95);
    background: var(--bili-border);
}

/* ========== 表单（优化）========== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--bili-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.form-input,
.form-textarea,
.form-select,
.form-file {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 15px;
    border: 1px solid var(--bili-border);
    border-radius: var(--radius-md);
    background: var(--bili-bg-secondary);
    color: var(--bili-text);
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus,
.form-file:focus {
    outline: none;
    border-color: var(--bili-primary);
    box-shadow: 0 0 0 3px rgba(251, 114, 153, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.6;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%239499A0' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
    background-position: right 12px center;
    background-repeat: no-repeat;
    background-size: 16px;
    padding-right: 40px;
}

.form-file {
    cursor: pointer;
}

.form-file::-webkit-file-upload-button {
    padding: var(--spacing-xs) var(--spacing-md);
    margin-right: var(--spacing-md);
    border: 1px solid var(--bili-border);
    border-radius: var(--radius-sm);
    background: var(--bili-bg);
    color: var(--bili-text);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.form-file::-webkit-file-upload-button:hover {
    background: var(--bili-border-light);
}

input[type="file"] {
    padding: var(--spacing-sm);
}

/* ========== 按钮组（优化）========== */
.btn-group {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
}

.btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: manipulation;
}

.btn-primary {
    background: var(--bili-primary);
    color: white;
    box-shadow: 0 2px 8px rgba(251, 114, 153, 0.3);
}

.btn-primary:active {
    background: var(--bili-primary-dark);
    transform: scale(0.98);
    box-shadow: 0 1px 4px rgba(251, 114, 153, 0.2);
}

.btn-secondary {
    background: var(--bili-bg);
    color: var(--bili-text);
    border: 1px solid var(--bili-border);
}

.btn-secondary:active {
    background: var(--bili-border-light);
    transform: scale(0.98);
}

/* ========== 空状态（优化）========== */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    color: var(--bili-text-secondary);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    opacity: 0.4;
}

.empty-state-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: var(--bili-text);
}

.empty-state-hint {
    font-size: 13px;
    color: var(--bili-text-secondary);
    line-height: 1.5;
}

/* ========== 消息提示（优化）========== */
.toast {
    position: fixed;
    top: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bili-text);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    z-index: 2000;
    box-shadow: var(--shadow-lg);
    animation: toastSlide 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    max-width: calc(100% - 48px);
    text-align: center;
    word-break: break-word;
}

.toast.hidden {
    display: none;
}

@keyframes toastSlide {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.toast.success {
    background: var(--bili-success);
}

.toast.error {
    background: var(--bili-danger);
}

/* ========== 加载动画 ========== */
.loading {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid var(--bili-border);
    border-top-color: var(--bili-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== 滚动条（优化）========== */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--bili-border);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bili-text-tertiary);
}

/* ========== 响应式 - 仅移动端 ========== */
@media (min-width: 481px) {
    body {
        max-width: 480px;
        margin: 0 auto;
        box-shadow: 0 0 0 1px var(--bili-border-light);
    }
}

/* ========== 安全区域适配 ========== */
@supports (padding: max(0px)) {
    body {
        padding-left: max(12px, env(safe-area-inset-left));
        padding-right: max(12px, env(safe-area-inset-right));
    }
    
    .navbar {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }
}

/* ========== 动画优化 ========== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 工具类 ========== */
.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.shadow-elevation-1 {
    box-shadow: var(--shadow-sm);
}

.shadow-elevation-2 {
    box-shadow: var(--shadow-md);
}

.shadow-elevation-3 {
    box-shadow: var(--shadow-lg);
}

/* ========== 密码输入框（支付密码风格）========== */
.password-input-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

/* 8位：上下两排布局 */
.password-input-container[data-length="8"] {
    flex-direction: column;
    gap: var(--spacing-md);
}

.password-row {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: center;
}

.password-input-container[data-length="8"] .password-row {
    gap: var(--spacing-md);
}

/* 6位：单排布局 */
.password-input-container[data-length="6"] {
    flex-direction: row;
    gap: var(--spacing-md);
}

.password-input {
    width: 48px;
    height: 56px;
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    border: 2px solid var(--bili-border);
    border-radius: var(--radius-md);
    background: var(--bili-bg-secondary);
    color: var(--bili-text);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    caret-color: transparent;
    cursor: default;
    user-select: none;
    flex-shrink: 0;
}

.password-input.filled {
    border-color: var(--bili-primary);
    background: var(--bili-primary-light);
}

.password-input.code-complete {
    animation: codeComplete 0.3s ease;
}

/* ========== 虚拟数字键盘（美观设计）========== */
.virtual-keyboard {
    background: var(--bili-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-lg);
}

.keyboard-row {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.keyboard-row:last-child {
    margin-bottom: 0;
}

.keyboard-key {
    flex: 1;
    max-width: 80px;
    height: 56px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--bili-bg);
    color: var(--bili-text);
    font-size: 24px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.keyboard-key::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(251, 114, 153, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.keyboard-key:active::before,
.keyboard-key.keyboard-key-pressed::before {
    width: 200px;
    height: 200px;
}

.keyboard-key:active,
.keyboard-key.keyboard-key-pressed {
    transform: scale(0.95);
    background: var(--bili-primary-light);
    color: var(--bili-primary);
    box-shadow: 0 2px 4px rgba(251, 114, 153, 0.2);
}

.keyboard-key:hover:not(:active):not(.keyboard-key-pressed) {
    background: var(--bili-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.keyboard-key-empty {
    background: transparent;
    box-shadow: none;
    cursor: default;
}

.keyboard-key-empty:hover {
    background: transparent;
    transform: none;
    box-shadow: none;
}

.keyboard-key-delete {
    background: var(--bili-danger);
    color: white;
    font-size: 20px;
}

.keyboard-key-delete:active,
.keyboard-key-delete.keyboard-key-pressed {
    background: #ff4d7a;
    color: white;
    transform: scale(0.95);
}

.keyboard-key-delete:hover:not(:active):not(.keyboard-key-pressed) {
    background: #ff3366;
    transform: translateY(-2px);
}

.keyboard-key:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* 模态框中的键盘样式 */
.verification-modal .virtual-keyboard {
    background: transparent;
    box-shadow: none;
    padding: var(--spacing-md) 0;
    margin-top: var(--spacing-md);
}

/* 输入动画 */
@keyframes codeInputPop {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* 完成动画 */
@keyframes codeComplete {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 3px rgba(251, 114, 153, 0.15);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 6px rgba(251, 114, 153, 0.25);
    }
}

/* 移动端优化 */
@media (max-width: 480px) {
    .password-input {
        width: 44px;
        height: 52px;
        font-size: 22px;
    }
    
    .password-input-container[data-length="8"] .password-row {
        gap: var(--spacing-sm);
    }
    
    .password-input-container[data-length="6"] {
        gap: var(--spacing-sm);
    }
    
    .keyboard-key {
        height: 50px;
        font-size: 20px;
        max-width: 70px;
    }
    
    .virtual-keyboard {
        padding: var(--spacing-md);
    }
    
    .keyboard-row {
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-sm);
    }
}

/* 小屏幕进一步优化 */
@media (max-width: 360px) {
    .password-input {
        width: 40px;
        height: 48px;
        font-size: 20px;
    }
    
    .password-input-container[data-length="8"] .password-row {
        gap: 8px;
    }
    
    .password-input-container[data-length="6"] {
        gap: 8px;
    }
    
    .keyboard-key {
        height: 46px;
        font-size: 18px;
        max-width: 65px;
    }
    
    .keyboard-row {
        gap: 8px;
    }
}