/* 现代化CSS样式 - 使用最先进的设计理念 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 现代化色彩系统 */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --secondary-blue: #3b82f6;
    --accent-blue: #60a5fa;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-light: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* 现代化字体系统 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    
    /* 现代化间距系统 */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    
    /* 现代化圆角系统 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
}
a {
    text-decoration: none;
}
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* -------- header 搜索栏调整 ------- */
.header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    padding: var(--spacing-4) var(--spacing-4) var(--spacing-6);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}
.search-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
}
.school-logo {
    flex-shrink: 0;
    margin-bottom: 12px; /* 增加logo下间距 */
}
.search-bar {
    width: 100%;
    max-width: 480px;
    position: relative;
    background: rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
/* 保证按钮位置和原输入行左右等距 */
.search-bar input {
    width: 100%;
}



.search-bar:focus-within {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.search-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: transparent;
    border: none;
    outline: none;
    color: white;
    font-size: var(--font-size-base);
    font-weight: 500;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-btn {
    position: absolute;
    right: var(--spacing-2);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.search-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.logo-img {
    height: 40px;
    width: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.05);
}

/* 一级栏目 */
.primary-nav {
    background: var(--primary-blue);
    padding: var(--spacing-3) 0;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-around;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.nav-item {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.nav-item:hover::before {
    left: 100%;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}
/* 下拉菜单样式 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
    padding: var(--spacing-2) var(--spacing-3);
    display: inline-block;
    border-radius: var(--radius-md);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--primary-blue);
    min-width: auto;
    width: 100%;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    margin-top: 0;
    overflow: hidden;
    transition: display 0.1s ease;
}

/* 桌面端悬停效果 */
@media (min-width: 769px) {
  .dropdown:hover .dropdown-menu {
     display: block;
  }
  .dropdown-menu:hover {
     display: block;
  }
}

/* 移动端点击效果 */
.dropdown.active .dropdown-menu {
    display: block;
}

.dropdown-item {
    display: block;
    color: white;
    text-decoration: none;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--font-size-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: transparent;
    border: none;
    text-align: center;
    width: 100%;
}

.dropdown-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateX(4px);
}

/* 按钮栏目 */
.button-section {
    background: var(--bg-primary);
    padding: var(--spacing-6) 0 0 0;
    position: relative;
}

.button-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.button-scroll-wrapper {
    position: relative;
}

.button-scroll-container {
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: var(--spacing-2);
}

.button-scroll-container::-webkit-scrollbar {
    display: none;
}

.button-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: var(--spacing-3);
    min-width: max-content;
    padding-right: var(--spacing-4);
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-4);
    background: var(--bg-primary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: var(--radius-xl);
}

.action-btn:hover::before {
    opacity: 0.05;
}

.action-btn:hover {
    transform: translateY(-4px);
    border-color: var(--primary-blue);
    box-shadow: var(--shadow-lg);
}

.action-btn:active {
    transform: translateY(-2px);
}

.btn-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.action-btn:hover .btn-icon {
    transform: scale(1.1);
}

.btn-text {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
    text-align: center;
    line-height: 1.2;
}

/* 滚动指示器 */
.scroll-indicator {
    display: flex;
    justify-content: center;
    margin-top: var(--spacing-4);
}

.scroll-dots {
    display: flex;
    gap: var(--spacing-2);
    background: rgba(0, 0, 0, 0.05);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
}

.scroll-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-dot.active {
    background: var(--primary-blue);
    transform: scale(1.3);
    width: 20px;
}

.scroll-dot:hover {
    background: var(--accent-blue);
    transform: scale(1.1);
}

/* 作品栏 */
.works-section {
    background: var(--bg-secondary);
    padding: 0 0 var(--spacing-12);
}

.works-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
    column-count: 2;
    column-gap: 1px;
    column-fill: balance;
}

.work-link {
    text-decoration: none;
    color: inherit;
    display: block;
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 1px;
    width: 100%;
}

.work-card {
    background: var(--bg-primary);
    border-radius: 4px;
    overflow: hidden;
    box-shadow: none;
    transition: transform 0.2s ease;
    position: relative;
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    width: 100%;
}

.work-card:hover {
    transform: scale(1.01);
    z-index: 10;
}

.work-image {
    position: relative;
    overflow: hidden;
    width: 100%;
    flex-shrink: 0;
    min-height: 200px;
    max-height: 400px;
}

.work-img {
    width: 100%;
    height: auto;
    object-fit: cover;
    display: block;
    transition: transform 0.2s ease;
    min-height: 200px;
}

.work-card:hover .work-img {
    transform: scale(1.05);
}

.work-content {
    padding: var(--spacing-3);
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.work-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: var(--spacing-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.work-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2);
    margin-top: var(--spacing-2);
}

.work-source {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.work-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.work-college {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-weight: 500;
    background: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-light);
}

.work-date {
    font-size: 0.55rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 底部信息 */
.footer {
    background: var(--primary-blue);
    color: white;
    padding: var(--spacing-6) var(--spacing-4);
    text-align: center;
}

.footer-content p {
    margin-bottom: var(--spacing-2);
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.footer-content p:last-child {
    margin-bottom: 0;
}

/* 响应式设计 */
@media (max-width: 480px) {
    .works-container {
        column-count: 2;
        column-gap: 1px;
        padding: 0;
    }
    
    .work-card {
        margin-bottom: 1px;
        border: 1px solid var(--border-light);
    }
    
    .work-content {
        padding: var(--spacing-2);
    }
    
    .work-title {
        font-size: var(--font-size-xs);
        line-height: 1.3;
    }
    
    .work-logo {
        width: 16px;
        height: 16px;
    }
    
    .work-college {
        font-size: 6px;
        padding: 1px 4px;
    }
    
    .work-date {
        font-size: 0.5rem;
    }
    
    /* 移动端错落效果调整 */
    .work-card:nth-child(2) { transform: translateY(4px); }
    .work-card:nth-child(3) { transform: translateY(-3px); }
    .work-card:nth-child(4) { transform: translateY(6px); }
    .work-card:nth-child(5) { transform: translateY(-2px); }
    .work-card:nth-child(6) { transform: translateY(3px); }
    .work-card:nth-child(7) { transform: translateY(-4px); }
    .work-card:nth-child(8) { transform: translateY(2px); }
    .work-card:nth-child(9) { transform: translateY(-3px); }
    .work-card:nth-child(10) { transform: translateY(5px); }
    
    .work-card:nth-child(even) {
        margin-top: 8px;
    }
    
    .work-image {
        min-height: 150px;
        max-height: 300px;
    }
    
    .work-img {
        min-height: 150px;
    }
    
    /* 移动端按钮滚动优化 */
    .button-grid {
        grid-template-columns: repeat(10, 1fr);
        gap: var(--spacing-2);
    }
    
    .action-btn {
        padding: var(--spacing-2);
        min-width: 60px;
    }
    
    .btn-icon {
        width: 20px;
        height: 20px;
    }
    
    .btn-text {
        font-size: 0.6rem;
    }
    
    .scroll-dot {
        width: 4px;
        height: 4px;
    }
    
    .scroll-dot.active {
        width: 16px;
    }
    
    .nav-container {
        flex-wrap: wrap;
        gap: var(--spacing-2);
    }
    
    .nav-item {
        font-size: 0.7rem;
        padding: var(--spacing-2);
    }
    .dropdown-item {
        font-size: 0.7rem;
        padding: var(--spacing-2) var(--spacing-3);
  }
    .footer-content p {
        font-size: 0.7rem;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
    .button-grid {
        grid-template-columns: repeat(10, 1fr);
        gap: var(--spacing-3);
    }
    
    .action-btn {
        padding: var(--spacing-3);
        min-width: 70px;
    }
    
    .btn-icon {
        width: 22px;
        height: 22px;
    }
    
    .btn-text {
        font-size: 0.55rem;
    }
    
    .works-container {
        column-count: 2;
        column-gap: 1px;
    }
    
    .work-card {
        margin-bottom: 1px;
        border: 1px solid var(--border-light);
    }
}

@media (min-width: 769px) {
    .button-grid {
        grid-template-columns: repeat(10, 1fr);
        gap: var(--spacing-4);
    }
    
    .action-btn {
        padding: var(--spacing-4);
        min-width: 80px;
    }
    
    .btn-icon {
        width: 24px;
        height: 24px;
    }
    
    .btn-text {
        font-size: 0.7rem;
    }
    
    .works-container {
        column-count: 2;
        column-gap: 1px;
        max-width: 768px;
    }
    
    .work-card {
        margin-bottom: 1px;
        border: 1px solid var(--border-light);
    }
}

/* 现代化动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.work-card {
    animation: fadeInUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* 创造参差不齐的错落美感 */
.work-card:nth-child(1) { 
    animation-delay: 0.1s; 
    transform: translateY(0px);
}
.work-card:nth-child(2) { 
    animation-delay: 0.2s; 
    transform: translateY(8px);
}
.work-card:nth-child(3) { 
    animation-delay: 0.3s; 
    transform: translateY(-5px);
}
.work-card:nth-child(4) { 
    animation-delay: 0.4s; 
    transform: translateY(12px);
}
.work-card:nth-child(5) { 
    animation-delay: 0.5s; 
    transform: translateY(-3px);
}
.work-card:nth-child(6) { 
    animation-delay: 0.6s; 
    transform: translateY(6px);
}
.work-card:nth-child(7) { 
    animation-delay: 0.7s; 
    transform: translateY(-8px);
}
.work-card:nth-child(8) { 
    animation-delay: 0.8s; 
    transform: translateY(4px);
}
.work-card:nth-child(9) { 
    animation-delay: 0.9s; 
    transform: translateY(-6px);
}
.work-card:nth-child(10) { 
    animation-delay: 1.0s; 
    transform: translateY(10px);
}

/* 增强错落美感的额外样式 */
.work-card:nth-child(odd) {
    margin-top: 0;
}

.work-card:nth-child(even) {
    margin-top: 15px;
}

/* 移除圆角计算以优化性能 */

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: var(--radius-full);
}

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




/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .action-btn:hover,
    .work-card:hover {
        transform: none;
    }
    
    .action-btn:active {
        transform: scale(0.98);
    }
    
    .work-card:active {
        transform: scale(0.98);
    }
}