/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 浅色调配色方案 */
    --primary-color: #6366f1;
    --primary-light: #a5b4fc;
    --primary-dark: #4f46e5;
    --secondary-color: #f1f5f9;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --background: #ffffff;
    --background-light: #f8fafc;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 导航栏样式 */
.navbar {
    background: var(--background);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 1.5rem;
    font-weight: 700;
}

.nav-logo i {
    margin-right: 8px;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.nav-auth {
    display: flex;
    gap: 1rem;
    margin-left: 2rem;
}

.login-btn {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.3s ease;
}

.login-btn:hover {
    background: var(--background-light);
    border-color: var(--primary-color);
}

.register-btn {
    padding: 8px 16px;
    background: var(--primary-color);
    color: white !important;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.register-btn:hover {
    background: var(--primary-dark);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* 主要内容区域 */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
    padding: 0 16px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-full {
    width: 100%;
}

/* 表单样式 */
.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--background);
}

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

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-group i {
    position: absolute;
    left: 16px;
    color: var(--text-light);
    z-index: 1;
}

.input-group input {
    padding-left: 48px;
}

.password-toggle {
    position: absolute;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
}

/* 页尾样式 */
.footer {
    background: var(--background-light);
    border-top: 1px solid var(--border-color);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--background);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-auth {
        margin-left: 0;
        margin-top: 1rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .container {
        padding: 0 20px;
    }

    .main-content {
        padding: 0 8px;
    }

    .hero {
        padding: 3rem 1.5rem;
        margin: 1rem 0;
    }

    .features {
        padding: 3rem 1.5rem;
        margin: 2rem 0;
    }

    .page-header {
        padding: 3rem 1.5rem;
        margin: 1rem 0 2rem 0;
    }

    .news-filters {
        padding: 2rem 1.5rem;
        margin-bottom: 2rem;
    }

    .publish-form-container {
        margin: 2rem auto;
        padding: 1rem;
    }

    .publish-form {
        padding: 2rem;
    }

    .auth-page {
        padding: 2rem 0.5rem;
    }

    .auth-container {
        padding: 0 16px;
    }

    .auth-card {
        padding: 2rem;
    }

    .about-content {
        margin: 2rem auto;
        padding: 1rem;
    }

    .company-intro,
    .services,
    .contact-info {
        padding: 2.5rem;
        margin-bottom: 2.5rem;
    }
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* 首页样式 */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: 6rem 2rem;
    margin: 2rem 0;
    background: linear-gradient(135deg, var(--background-light) 0%, var(--secondary-color) 100%);
    border-radius: 16px;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image {
    text-align: center;
}

.hero-image i {
    font-size: 8rem;
    color: var(--primary-light);
    opacity: 0.8;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.featured-news {
    padding: 5rem 0;
    margin: 3rem 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.news-card {
    background: var(--background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-card-image {
    height: 200px;
    background: var(--background-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 3rem;
}

.news-card-content {
    padding: 2rem;
}

.news-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    line-height: 1.4;
}

.news-card-summary {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

.news-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-light);
}

.news-card-category {
    background: var(--primary-light);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
}

.features {
    padding: 5rem 2rem;
    margin: 3rem 0;
    background: var(--background-light);
    border-radius: 16px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--background);
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-2px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 页面头部样式 */
.page-header {
    text-align: center;
    padding: 4rem 2rem;
    margin: 2rem 0 3rem 0;
    background: var(--background-light);
    border-radius: 16px;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* 资讯页面样式 */
.news-filters {
    padding: 3rem 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 3rem;
    background: var(--background);
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.search-box {
    display: flex;
    max-width: 400px;
    margin: 0 auto 2rem;
}

.search-box input {
    flex: 1;
    border-radius: 8px 0 0 8px;
    border-right: none;
}

.search-box button {
    padding: 12px 16px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
    transition: background 0.3s ease;
}

.search-box button:hover {
    background: var(--primary-dark);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 16px;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.news-list {
    min-height: 400px;
    padding: 2rem 0;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 3rem;
}

.pagination button {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    background: var(--background);
    color: var(--text-secondary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.pagination button:hover,
.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--background);
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    animation: slideIn 0.3s ease;
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    color: var(--text-light);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* 发布页面样式 */
.publish-form-container {
    max-width: 800px;
    margin: 3rem auto;
    padding: 2rem;
}

.publish-form {
    background: var(--background);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.form-hint {
    color: var(--text-light);
    font-size: 0.8rem;
    margin-top: 0.5rem;
}

.char-count {
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.image-upload {
    position: relative;
}

.upload-placeholder {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-placeholder:hover {
    border-color: var(--primary-color);
    background: var(--background-light);
}

.upload-placeholder i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.upload-placeholder p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.upload-placeholder small {
    color: var(--text-light);
}

.image-preview {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
}

.image-preview img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.remove-image {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.success-message {
    max-width: 600px;
    margin: 4rem auto;
    text-align: center;
    padding: 3rem 2rem;
    background: var(--background);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.success-content i {
    font-size: 4rem;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.success-content h3 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.success-content p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.success-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 认证页面样式 */
.auth-page {
    background: var(--background-light);
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
}

.auth-container {
    width: 100%;
    max-width: 450px;
    margin: 0 auto;
    padding: 0 24px;
}

.auth-card {
    background: var(--background);
    padding: 3rem;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    margin-right: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: -2px;
    left: 2px;
    color: white;
    font-size: 12px;
}

.forgot-password {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.forgot-password:hover {
    color: var(--primary-dark);
}

.auth-divider {
    text-align: center;
    margin: 1.5rem 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span {
    background: var(--background);
    padding: 0 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
}

.social-login {
    display: flex;
    gap: 1rem;
}

.btn-social {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    background: var(--background);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-wechat:hover {
    border-color: #1aad19;
    color: #1aad19;
}

.btn-qq:hover {
    border-color: #12b7f5;
    color: #12b7f5;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.auth-footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    color: var(--primary-dark);
}

/* 关于我们页面样式 */
.about-content {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 2rem;
}

.company-intro {
    background: var(--background);
    padding: 4rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 4rem;
}

.company-intro h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.company-intro p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.mission-vision {
    margin-bottom: 4rem;
}

.mission-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.mission-card {
    background: var(--background);
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

.mission-card:hover {
    transform: translateY(-4px);
}

.mission-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.mission-card h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.mission-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.services {
    background: var(--background-light);
    padding: 4rem;
    border-radius: 16px;
    margin-bottom: 4rem;
}

.services h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-item {
    background: var(--background);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease;
}

.service-item:hover {
    transform: translateY(-2px);
}

.service-item i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.service-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.service-item p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-info {
    background: var(--background);
    padding: 4rem;
    border-radius: 16px;
    box-shadow: var(--shadow);
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    text-align: center;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-item {
    text-align: center;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    border-color: var(--primary-color);
    background: var(--background-light);
}

.contact-item i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-item h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--text-secondary);
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
        padding: 3rem 1.5rem;
        margin: 1rem 0;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        gap: 1rem;
    }

    .hero-image i {
        font-size: 4rem;
    }

    .section-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .mission-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .form-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .success-actions {
        flex-direction: column;
        gap: 1rem;
    }

    .social-login {
        flex-direction: column;
        gap: 1rem;
    }

    .filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 1rem;
        gap: 0.5rem;
    }

    .pagination {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .news-card-content {
        padding: 1.5rem;
    }

    .feature-card {
        padding: 2rem;
    }

    .mission-card {
        padding: 2rem;
    }

    .service-item {
        padding: 1.5rem;
    }

    .contact-item {
        padding: 1.5rem;
    }

    .news-detail-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .news-detail-actions {
        flex-direction: column;
        gap: 1rem;
    }
}

/* 新闻详情样式 */
.news-detail-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
}

.news-detail-category {
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
}

.news-detail-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 1rem 0;
    line-height: 1.3;
}

.news-detail-meta {
    display: flex;
    gap: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.news-detail-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-detail-content {
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.news-detail-content h2 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.news-detail-content h3 {
    font-size: 1.3rem;
    margin: 1.5rem 0 0.8rem;
    color: var(--text-primary);
}

.news-detail-content p {
    margin-bottom: 1rem;
}

.news-detail-actions {
    display: flex;
    gap: 1rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 空状态样式 */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

/* 标签样式 */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    background: var(--background-light);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* 选择文本样式 */
::selection {
    background: var(--primary-light);
    color: white;
}

/* 焦点样式 */
button:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 禁用状态 */
button:disabled,
input:disabled,
textarea:disabled,
select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .btn,
    .modal {
        display: none !important;
    }

    .main-content {
        margin-top: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    h1, h2, h3 {
        page-break-after: avoid;
    }
}