/* 知识分享页面样式 */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #6c63ff;
    --success-color: #2ecc71;
    --warning-color: #f1c40f;
    --danger-color: #e74c3c;
    --text-color: #2c3e50;
    --light-text: #7f8c8d;
    --card-bg: #ffffff;
    --light-bg: #f5f6fa;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* 英雄区域样式 */
.knowledge-hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 100px 0 60px;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 40px;
}

.contribution-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 40px;
}

.stat {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    min-width: 150px;
}

.stat .number {
    font-size: 2.5rem;
    font-weight: bold;
    display: block;
    margin-bottom: 5px;
}

.stat .label {
    font-size: 0.9rem;
    opacity: 0.9;
}

.floating-cards {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 60px;
}

.float-card {
    background: white;
    padding: 20px 30px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 15px;
    color: var(--text-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: var(--transition);
}

.float-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.float-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* 主要内容区域样式 */
.content-wrapper {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
}

.tabs-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.tab {
    padding: 15px 30px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--light-bg);
    color: var(--text-color);
}

.tab i {
    font-size: 1.2rem;
}

.tab.active {
    background: var(--primary-color);
    color: white;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

/* 表单样式 */
.form-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-container h2 {
    margin-bottom: 30px;
    color: var(--text-color);
    font-size: 1.8rem;
}

.modern-form {
    display: grid;
    gap: 25px;
}

.form-group {
    display: grid;
    gap: 10px;
}

.form-group label {
    color: var(--text-color);
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group select,
.form-group textarea {
    padding: 12px 15px;
    border: 2px solid var(--light-bg);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    outline: none;
}

.difficulty-selector {
    display: flex;
    gap: 20px;
}

.difficulty-selector input[type="radio"] {
    display: none;
}

.difficulty-selector label {
    padding: 10px 20px;
    border-radius: var(--border-radius);
    background: var(--light-bg);
    cursor: pointer;
    transition: var(--transition);
}

.difficulty-selector input[type="radio"]:checked + label {
    background: var(--primary-color);
    color: white;
}

.file-upload {
    border: 2px dashed var(--light-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.file-upload:hover {
    border-color: var(--primary-color);
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.file-upload span {
    color: var(--light-text);
}

.submit-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.submit-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

/* 富文本编辑器样式 */
.rich-editor {
    border: 2px solid var(--light-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.editor-toolbar {
    padding: 10px;
    background: var(--light-bg);
    display: flex;
    gap: 10px;
}

.editor-toolbar button {
    background: none;
    border: none;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.editor-toolbar button:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* 标签输入样式 */
.tag-input {
    position: relative;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.tag {
    background: var(--light-bg);
    padding: 5px 10px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.tag i {
    cursor: pointer;
    font-size: 0.8rem;
}

/* 创新领域标签样式 */
.innovation-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.tag-chip {
    cursor: pointer;
}

.tag-chip input[type="checkbox"] {
    display: none;
}

.tag-chip span {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--light-bg);
    transition: var(--transition);
}

.tag-chip input[type="checkbox"]:checked + span {
    background: var(--primary-color);
    color: white;
}

/* 参考链接样式 */
.link-input {
    display: flex;
    gap: 10px;
}

.add-link {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 0 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.add-link:hover {
    background: #27ae60;
}

.links-list {
    margin-top: 15px;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .contribution-stats {
        flex-direction: column;
        gap: 20px;
    }

    .floating-cards {
        flex-direction: column;
        align-items: center;
    }

    .tabs-container {
        flex-direction: column;
    }

    .form-container {
        padding: 20px;
    }

    .difficulty-selector {
        flex-direction: column;
    }
}

/* 暗色模式适配 */
body.dark-mode {
    --card-bg: #2d3436;
    --light-bg: #353b48;
    --text-color: #dfe6e9;
    --light-text: #b2bec3;
    --primary-color: #74b9ff;
    --secondary-color: #a29bfe;
    --success-color: #00b894;
    --warning-color: #ffeaa7;
    --danger-color: #ff7675;
    --border-color: #4a5568;
}

body.dark-mode .form-container {
    background: var(--card-bg);
}

body.dark-mode .tab {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .form-group input,
body.dark-mode .form-group select,
body.dark-mode .form-group textarea {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .file-upload {
    border-color: var(--light-bg);
}

body.dark-mode .editor-toolbar {
    background: var(--light-bg);
    border-bottom: 1px solid var(--text-color);
}

body.dark-mode .tag-chip span {
    background: var(--light-bg);
    color: var(--text-color);
}

/* 邮箱投稿样式 */
.email-guide {
    display: grid;
    gap: 30px;
}

.guide-section {
    background: var(--light-bg);
    border-radius: var(--border-radius);
    padding: 25px;
    transition: var(--transition);
}

.guide-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.guide-section h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.guide-section h3 i {
    font-size: 1.4rem;
}

.email-format {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 15px;
}

.email-format h4 {
    color: var(--text-color);
    margin-bottom: 15px;
}

.email-format ul {
    list-style: none;
    padding: 0;
}

.email-format li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
    color: var(--text-color);
}

.email-format li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.email-addresses {
    display: grid;
    gap: 20px;
    margin-top: 15px;
}

.email-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.email-card:hover {
    transform: translateX(10px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.email-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.email-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.email-type {
    font-size: 0.9rem;
    color: var(--light-text);
}

.email-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.email-link:hover {
    color: var(--secondary-color);
}

.quick-submit {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.mail-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px;
    border-radius: var(--border-radius);
    text-decoration: none;
    color: white;
    font-weight: 500;
    transition: var(--transition);
}

.mail-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.qq-mail {
    background: #12B7F5;
}

.netease-mail {
    background: #D43C33;
}

.outlook-mail {
    background: #0072C6;
}

.gmail {
    background: #EA4335;
}

.notice-list {
    display: grid;
    gap: 15px;
    margin-top: 15px;
}

.notice-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.notice-item:hover {
    transform: translateX(5px);
}

.notice-item i {
    color: var(--success-color);
    font-size: 1.2rem;
}

/* 暗色模式适配 */
body.dark-mode .guide-section {
    background: var(--card-bg);
}

body.dark-mode .email-card,
body.dark-mode .notice-item,
body.dark-mode .email-format {
    background: var(--light-bg);
}

/* 响应式适配 */
@media (max-width: 768px) {
    .quick-submit {
        grid-template-columns: 1fr;
    }

    .email-card {
        flex-direction: column;
        text-align: center;
    }

    .guide-section {
        padding: 20px;
    }
}

/* 警告公示条样式 */
.alert-banner {
    background: linear-gradient(45deg, #ff4444, #cc0000);
    color: white;
    padding: 12px 0;
    position: relative;
    overflow: hidden;
}

.alert-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        rgba(0, 0, 0, 0.1),
        rgba(0, 0, 0, 0.1) 10px,
        rgba(0, 0, 0, 0.2) 10px,
        rgba(0, 0, 0, 0.2) 20px
    );
    animation: moveStripes 20s linear infinite;
}

@keyframes moveStripes {
    0% { background-position: 0 0; }
    100% { background-position: 50px 50px; }
}

.alert-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.alert-icon {
    font-size: 1.5rem;
    margin-right: 15px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.alert-message {
    flex: 1;
}

.alert-message strong {
    margin-right: 10px;
    font-weight: 600;
}

.beijing-time {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-left: 20px;
    border-left: 2px solid rgba(255, 255, 255, 0.3);
    font-family: monospace;
    font-size: 1.1rem;
}

.beijing-time i {
    animation: rotateIcon 2s linear infinite;
}

@keyframes rotateIcon {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 响应式适配 */
@media (max-width: 768px) {
    .alert-content {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }

    .alert-icon {
        margin-right: 0;
    }

    .beijing-time {
        border-left: none;
        padding-left: 0;
        padding-top: 10px;
        border-top: 2px solid rgba(255, 255, 255, 0.3);
    }
}

/* 暗色模式变量 */
body.dark-mode {
    --card-bg: #2d3436;
    --light-bg: #353b48;
    --text-color: #dfe6e9;
    --light-text: #b2bec3;
    --primary-color: #74b9ff;
    --secondary-color: #a29bfe;
    --success-color: #00b894;
    --warning-color: #ffeaa7;
    --danger-color: #ff7675;
    --border-color: #4a5568;
}

/* 暗色模式适配 */
body.dark-mode .knowledge-hero {
    background: linear-gradient(135deg, #2c3e50, #3d3d3d);
}

body.dark-mode .float-card {
    background: var(--card-bg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

body.dark-mode .float-card:hover {
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

body.dark-mode .stat {
    background: rgba(0, 0, 0, 0.2);
}

body.dark-mode .form-container {
    background: var(--card-bg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

body.dark-mode .tab {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .tab.active {
    background: var(--primary-color);
    color: #fff;
}

body.dark-mode .form-group label {
    color: var(--text-color);
}

body.dark-mode .form-group input,
body.dark-mode .form-group select,
body.dark-mode .form-group textarea {
    background: var(--light-bg);
    color: var(--text-color);
    border-color: var(--border-color);
}

body.dark-mode .form-group input:focus,
body.dark-mode .form-group select:focus,
body.dark-mode .form-group textarea:focus {
    border-color: var(--primary-color);
}

body.dark-mode .difficulty-selector label {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .difficulty-selector input[type="radio"]:checked + label {
    background: var(--primary-color);
    color: #fff;
}

body.dark-mode .file-upload {
    border-color: var(--border-color);
    background: var(--light-bg);
}

body.dark-mode .file-upload:hover {
    border-color: var(--primary-color);
}

body.dark-mode .submit-btn {
    background: var(--primary-color);
}

body.dark-mode .submit-btn:hover {
    background: var(--secondary-color);
}

body.dark-mode .rich-editor {
    border-color: var(--border-color);
}

body.dark-mode .editor-toolbar {
    background: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
}

body.dark-mode .editor-toolbar button {
    color: var(--text-color);
}

body.dark-mode .editor-toolbar button:hover {
    background: rgba(255, 255, 255, 0.1);
}

body.dark-mode .tag {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .tag-chip span {
    background: var(--light-bg);
    color: var(--text-color);
}

body.dark-mode .tag-chip input[type="checkbox"]:checked + span {
    background: var(--primary-color);
    color: #fff;
}

body.dark-mode .guide-section {
    background: var(--card-bg);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

body.dark-mode .guide-section:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

body.dark-mode .email-card,
body.dark-mode .notice-item,
body.dark-mode .email-format {
    background: var(--light-bg);
    border: 1px solid var(--border-color);
}

body.dark-mode .email-type {
    color: var(--light-text);
}

body.dark-mode .email-link {
    color: var(--primary-color);
}

body.dark-mode .email-link:hover {
    color: var(--secondary-color);
}

body.dark-mode .footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

body.dark-mode .footer-logo h3,
body.dark-mode .footer-section h4 {
    color: var(--text-color);
}

body.dark-mode .footer-logo p,
body.dark-mode .footer-section ul li a {
    color: var(--light-text);
}

body.dark-mode .footer-bottom {
    border-top: 1px solid var(--border-color);
}

/* 通知样式暗色模式 */
body.dark-mode .notification {
    background: var(--card-bg);
    color: var(--text-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* 滚动条暗色模式 */
body.dark-mode ::-webkit-scrollbar {
    width: 10px;
}

body.dark-mode ::-webkit-scrollbar-track {
    background: var(--light-bg);
}

body.dark-mode ::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

body.dark-mode ::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}