/* 统一响应式样式文件 */

/* 通用响应式工具类 */
@media (max-width: 1400px) {
    .container {
        max-width: 1200px;
    }
}

@media (max-width: 1200px) {
    .container {
        max-width: 992px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 768px;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 100%;
        padding: 0 20px;
    }
    
    .section {
        padding: 30px 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    /* 网格布局响应式 */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .grid-2-md {
        grid-template-columns: 1fr;
    }
    
    /* 卡片样式响应式 */
    .card {
        padding: 20px;
    }
    
    /* 按钮响应式 */
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    /* 间距响应式 */
    .section-gap {
        margin-bottom: 40px;
    }
    
    .section-gap-lg {
        margin-bottom: 60px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .section {
        padding: 20px 15px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .card {
        padding: 15px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .section-gap {
        margin-bottom: 30px;
    }
    
    .section-gap-lg {
        margin-bottom: 40px;
    }
}

/* 特定页面响应式样式 */

/* 首页响应式 */
@media (max-width: 1100px) {
    .main-content {
        grid-template-columns: 320px 1fr;
        gap: 40px;
        padding-right: 40px;
    }
}

@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
        padding-right: 0;
    }
    
    .news-section,
    .featured-section {
        margin-bottom: 30px;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .news-container,
    .featured-container {
        height: 400px;
    }
    
    .news-item {
        padding: 20px;
        margin-bottom: 15px;
    }
    
    .news-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .news-badge {
        align-self: flex-start;
    }
    
    .news-title {
        font-size: var(--font-size-lg);
    }
    
    .news-excerpt {
        font-size: var(--font-size-sm);
        max-height: 2.4em;
    }
    
    .news-excerpt::after {
        height: 1.2em;
        width: 40px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .partner-logo {
        padding: 15px;
        height: 60px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-section {
        padding: 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .news-container,
    .featured-container {
        height: 300px;
    }
    
    .news-item {
        padding: 15px;
        margin-bottom: 12px;
    }
    
    .news-item-header {
        gap: 8px;
    }
    
    .news-date {
        font-size: var(--font-size-2xs);
    }
    
    .news-badge {
        font-size: var(--font-size-3xs);
        padding: 3px 6px;
    }
    
    .news-title {
        font-size: var(--font-size-base);
        margin-bottom: var(--space-xs);
    }
    
    .news-excerpt {
        font-size: var(--font-size-xs);
        max-height: 1.8em;
        line-height: 1.5;
    }
    
    .read-more {
        font-size: var(--font-size-xs);
        padding: 6px 12px;
    }
    
    .read-more i {
        font-size: var(--font-size-2xs);
    }
    
    .partners-grid {
        grid-template-columns: 1fr;
    }
    
    .partner-logo {
        height: 50px;
        padding: 10px;
    }
}

/* 基地介绍页响应式 */
@media (max-width: 768px) {
    .intro-title {
        font-size: 2.3rem;
    }
    
    .intro-subtitle {
        font-size: 1.2rem;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        margin: 30px 0;
    }
    
    .stat-item {
        padding: 20px;
        min-width: 180px;
    }
    
    .stat-value {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        left: 0 !important;
        padding-left: 50px;
        padding-right: 0;
        text-align: left;
    }
    
    .timeline-item:nth-child(odd) {
        text-align: left;
    }
    
    .timeline-item::before {
        left: 10px !important;
        right: auto !important;
    }
    
    .timeline-content::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .intro-title {
        font-size: 2rem;
    }
    
    .intro-subtitle {
        font-size: 1rem;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stat-item {
        padding: 15px;
        min-width: auto;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .features-grid {
        gap: 15px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .timeline {
        padding-left: 15px;
    }
    
    .timeline-item {
        padding: 10px 0 10px 40px;
    }
    
    .timeline-content {
        padding: 15px;
    }
    
    .timeline-title {
        font-size: 15px;
    }
    
    .timeline-description {
        font-size: 13px;
    }
}

/* 加入我们页响应式 */
@media (max-width: 768px) {
    .reasons-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .reason-card {
        padding: 25px;
    }
    
    .position-tabs {
        flex-direction: column;
        gap: 10px;
    }
    
    .position-tab {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .position-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 30px;
    }
    
    .process-step {
        max-width: 100%;
    }
}

/* 知识库页响应式 */
@media (max-width: 768px) {
    .stats-container {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        order: -1;
    }
    
    .function-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .function-card {
        padding: 20px;
    }
}

/* 导航栏响应式样式 */
@media (max-width: 992px) {
    .navbar {
        padding: 12px 20px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .nav-link {
        font-size: 14px;
        padding: 6px 12px;
    }
    
    .auth-buttons {
        gap: 0.5rem;
    }
    
    .btn-login, .btn-register, .btn-write {
        padding: 0.5rem 1rem;
        font-size: 13px;
    }
    
    .username {
        max-width: 80px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 10px 15px;
        flex-wrap: wrap;
        position: relative;
    }
    
    .logo-text {
        font-size: 16px;
    }
    
    .logo-icon {
        width: 36px;
        height: 36px;
    }
    
    .logo-icon i {
        font-size: 18px;
    }
    
    .mobile-menu-btn {
        display: block;
        order: 3;
        margin-left: auto;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--tech-bg);
        border: 2px solid var(--sketch-border);
        border-top: none;
        border-radius: 0 0 12px 12px;
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: 1rem 1.5rem;
        border-radius: 0;
        border: none;
        border-bottom: 1px solid var(--gray);
        transform: none;
        font-size: 14px;
    }
    
    .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-link:hover, .nav-link.active {
        transform: none;
        box-shadow: none;
        background: var(--light-gray);
    }
    
    .nav-right {
        order: 4;
        width: 100%;
        margin-top: 1rem;
        justify-content: center;
    }
    
    .auth-section, .user-section {
        width: 100%;
        justify-content: center;
    }
    
    .auth-buttons {
        width: 100%;
        justify-content: center;
    }
    
    .btn-login, .btn-register {
        padding: 0.75rem 1.5rem;
        font-size: 14px;
        flex: 1;
        max-width: 120px;
        justify-content: center;
    }
    
    .user-section {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .quick-actions {
        width: 100%;
        justify-content: center;
    }
    
    .btn-write {
        width: 100%;
        max-width: 200px;
        justify-content: center;
        padding: 0.75rem 1.5rem;
    }
    
    .user-menu {
        width: 100%;
        display: flex;
        justify-content: center;
    }
    
    .user-avatar-wrapper {
        padding: 0.75rem 1.5rem;
        min-width: 200px;
        justify-content: center;
    }
    
    .user-dropdown {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        border: none;
        border-radius: 0;
        min-width: auto;
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 2000;
    }
    
    .user-dropdown.active {
        transform: none;
    }
    
    .user-dropdown > * {
        background: var(--tech-bg);
        border: 2px solid var(--sketch-border);
        border-radius: 12px;
        max-width: 300px;
        width: 90%;
        max-height: 80vh;
        overflow-y: auto;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 8px 12px;
    }
    
    .logo-text {
        font-size: 14px;
    }
    
    .logo-text span {
        display: none;
    }
    
    .auth-buttons {
        gap: 0.5rem;
    }
    
    .btn-login, .btn-register {
        padding: 0.5rem 1rem;
        font-size: 13px;
        max-width: 100px;
    }
    
    .btn-login span, .btn-register span {
        display: none;
    }
    
    .btn-login i, .btn-register i {
        margin: 0;
    }
    
    .user-avatar-wrapper {
        min-width: auto;
        padding: 0.5rem 1rem;
    }
    
    .username {
        max-width: 60px;
        font-size: 13px;
    }
    
    .btn-write {
        padding: 0.5rem 1rem;
        font-size: 13px;
    }
    
    .btn-write span {
        display: none;
    }
    
    .btn-write i {
        margin: 0;
    }
}