/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a1a;
    --primary-light: #2a2a2a;
    --accent-color: #4a9eff;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --bg-color: #0a0a0a;
    --card-bg: #1f1f1f;
    --border-color: #333333;
    --success-color: #4caf50;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: var(--primary-color);
    padding: 25px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.header-logo {
    height: 45px;
    width: auto;
    margin-right: 12px;
    vertical-align: middle;
}

.logo-link {
    text-decoration: none;
    color: inherit;
    display: inline-flex;
    align-items: center;
    transition: transform 0.2s;
}

.logo-link:hover {
    transform: scale(1.02);
}

.logo {
    font-size: 2.2rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 1px;
    color: var(--text-primary);
}

.subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* 导航样式 */
.nav {
    background: var(--primary-light);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border-color);
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
}

/* 搜索框样式 */
.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    max-width: 600px;
}

.search-input {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 15px;
    border-radius: 6px;
    width: 100%;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.2);
}

.search-btn {
    background: var(--accent-color);
    border: none;
    color: white;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(74, 158, 255, 0.4);
}

/* 新增按钮 */
.add-btn {
    background: linear-gradient(135deg, #4caf50 0%, #388e3c 100%);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s;
    white-space: nowrap;
}

.add-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.4);
}

/* 重置按钮 */
.reset-btn {
    background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s;
    white-space: nowrap;
    margin-left: 10px;
}

.reset-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.4);
}

/* 分类标签栏 */
.category-bar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 60px;
    z-index: 999;
}

.category-bar .container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.category-btn {
    background: var(--primary-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.category-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.category-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* 主要内容 */
.main {
    padding: 30px 0;
    min-height: 60vh;
}

/* 统计栏 */
.stats-bar {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 20px;
    margin-bottom: 25px;
    display: flex;
    gap: 30px;
}

.stat-item {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat-item strong {
    color: var(--accent-color);
    font-size: 1.1rem;
}

/* 问题列表 */
.problem-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

/* 问题卡片 */
.problem-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s;
    animation: fadeIn 0.4s ease-out;
}

.problem-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    border-color: var(--accent-color);
}

.problem-card.search-highlight {
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(74, 158, 255, 0.3);
    animation: highlightPulse 1s ease-in-out;
}

.problem-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.problem-title-group {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.category-tag {
    background: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.category-tag.product {
    background: #4a9eff;
}

.category-tag.install {
    background: #ff9800;
}

.category-tag.technical {
    background: #9c27b0;
}

.category-tag.after-sales {
    background: #f44336;
}

.category-tag.other {
    background: #607d8b;
}

.problem-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.expand-icon {
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: transform 0.3s;
}

.problem-card.expanded .expand-icon {
    transform: rotate(180deg);
}

.problem-body {
    display: none;
    padding: 20px;
}

.problem-card.expanded .problem-body {
    display: block;
}

.problem-answer {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    white-space: pre-wrap;
    margin-bottom: 15px;
}

/* 答案中的图片 */
.answer-image {
    position: relative;
    display: inline-block;
    max-width: 200px;
    margin: 10px 10px 10px 0;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    vertical-align: top;
}

.answer-image:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(74, 158, 255, 0.3);
    border-color: var(--accent-color);
}

.answer-image img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 150px;
    object-fit: cover;
    background: white;
}

.answer-image .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.answer-image:hover .image-overlay {
    opacity: 1;
}

.answer-image .image-overlay span {
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
}

/* 图片模态框 */
.image-modal {
    display: none;
    position: fixed;
    z-index: 20000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease-out;
}

.image-modal-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: white;
    font-size: 50px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    z-index: 20001;
    background: rgba(0, 0, 0, 0.5);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.image-modal-close:hover {
    background: rgba(255, 0, 0, 0.7);
    transform: scale(1.1);
}

.image-modal-content {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease-out;
}

.problem-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.problem-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.problem-tag {
    background: var(--primary-light);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.problem-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    background: var(--primary-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.action-btn:hover {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.action-btn.delete:hover {
    background: #f44336;
    border-color: #f44336;
}

/* 无结果提示 */
.no-results {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-secondary);
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.5;
}

.no-results p {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.no-results .hint {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content-box {
    background: var(--card-bg);
    margin: 50px auto;
    width: 90%;
    max-width: 600px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    animation: modalFadeIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
}

.close-modal {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s;
    line-height: 1;
}

.close-modal:hover {
    color: #f44336;
}

#addForm {
    padding: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 0.95rem;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    font-family: inherit;
}

/* 图片选择器 */
.image-picker {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.picker-btn {
    background: var(--primary-light);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s;
    white-space: nowrap;
}

.picker-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.image-select {
    flex: 1;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
}

.image-input {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.btn-cancel,
.btn-submit {
    padding: 10px 25px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
}

.btn-cancel {
    background: var(--primary-light);
    color: var(--text-secondary);
}

.btn-cancel:hover {
    background: var(--border-color);
}

.btn-submit {
    background: var(--accent-color);
    color: white;
}

.btn-submit:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(74, 158, 255, 0.4);
}

/* Toast提示 */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success-color);
    color: white;
    padding: 12px 25px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: all 0.3s;
    z-index: 10001;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast-icon {
    font-size: 1.2rem;
}

/* 页脚 */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 30px 0 15px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
    margin-bottom: 20px;
}

.company-info,
.shop-links,
.wechat-qrcode {
    flex: 1;
    min-width: 200px;
}

.company-info h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: white;
}

.shop-links h4 {
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.9);
}

.shop-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 6px 0;
    transition: color 0.2s;
    font-size: 0.9rem;
}

.shop-link:hover {
    color: var(--accent-color);
}

.wechat-qrcode {
    text-align: center;
}

.wechat-qrcode h4 {
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: rgba(255, 255, 255, 0.9);
}

.qr-image {
    width: 100px;
    height: 100px;
    object-fit: contain;
    border-radius: 6px;
    background: white;
    padding: 6px;
    margin-bottom: 6px;
}

.wechat-qrcode p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.8rem;
}

.copyright {
    text-align: center;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
}

/* 在线客服悬浮按钮 */
.floating-cs {
    position: fixed;
    right: 30px;
    bottom: 100px;
    background: linear-gradient(135deg, #4a9eff 0%, #357abd 100%);
    color: white;
    padding: 12px 20px;
    border-radius: 50px;
    text-decoration: none;
    box-shadow: 0 4px 16px rgba(74, 158, 255, 0.4);
    transition: all 0.3s;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.floating-cs:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(74, 158, 255, 0.6);
}

.cs-icon {
    font-size: 1.3rem;
}

/* 隐藏 */
.hidden {
    display: none !important;
}

/* 搜索高亮 */
.search-highlight {
    background: rgba(74, 158, 255, 0.3);
    padding: 0 2px;
    border-radius: 2px;
    color: var(--text-primary);
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes highlightPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(74, 158, 255, 0.7);
    }
    100% {
        box-shadow: 0 0 0 20px rgba(74, 158, 255, 0);
    }
}

/* 响应式 */
@media (max-width: 768px) {
    .logo {
        font-size: 1.6rem;
    }

    .header-logo {
        height: 40px;
        margin-right: 8px;
    }

    .nav .container {
        flex-direction: column;
        gap: 12px;
    }

    .search-box {
        max-width: 100%;
    }

    .category-bar {
        position: static;
    }

    .category-bar .container {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 5px;
    }

    .category-btn {
        white-space: nowrap;
    }

    .stats-bar {
        flex-direction: column;
        gap: 8px;
    }

    .problem-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .problem-title-group {
        width: 100%;
    }

    .problem-meta {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .problem-actions {
        width: 100%;
    }

    .action-btn {
        flex: 1;
        justify-content: center;
    }

    .modal-content-box {
        margin: 20px auto;
        width: 95%;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .floating-cs {
        right: 20px;
        bottom: 80px;
        padding: 10px 15px;
    }

    .cs-text {
        font-size: 0.8rem;
    }
}