/* 上外新生攻略 - 现代化玻璃拟态设计样式 */

/* CSS变量定义 */
:root {
    /* 主色调系统 */
    --primary-blue: #1F3B8A;           /* 主色调 - 专业蓝 */
    --primary-blue-light: #3B5998;     /* 浅蓝变体 */
    --primary-blue-dark: #152B5F;      /* 深蓝变体 */

    --accent-orange: #FF6B35;          /* 点缀色 - 活力橙 */
    --accent-orange-light: #FF8A5B;    /* 浅橙变体 */
    --accent-orange-dark: #E55A2B;     /* 深橙变体 */

    --text-primary: #2C3E50;           /* 主要文字 - 深灰 */
    --text-secondary: #5A6C7D;         /* 次要文字 - 中灰 */
    --text-light: #8A9BA8;             /* 辅助文字 - 浅灰 */
    --text-white: #FFFFFF;             /* 白色文字 */

    /* 玻璃拟态背景 */
    --glass-bg-primary: rgba(255, 255, 255, 0.08);      /* 主要玻璃背景 */
    --glass-bg-secondary: rgba(255, 255, 255, 0.12);    /* 次要玻璃背景 */
    --glass-bg-hover: rgba(255, 255, 255, 0.18);        /* 悬停玻璃背景 */
    --glass-border: rgba(255, 255, 255, 0.2);           /* 玻璃边框 */
    --glass-border-hover: rgba(255, 255, 255, 0.3);     /* 悬停边框 */

    /* 多层次阴影系统 */
    --glass-shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-shadow-medium: 0 12px 40px rgba(0, 0, 0, 0.12);
    --glass-shadow-strong: 0 20px 60px rgba(0, 0, 0, 0.15);
    --glass-shadow-hover: 0 25px 80px rgba(0, 0, 0, 0.2);

    /* Material Design阴影层级 */
    --elevation-1: 0 2px 8px rgba(0,0,0,0.08);
    --elevation-2: 0 4px 16px rgba(0,0,0,0.12);
    --elevation-3: 0 8px 24px rgba(0,0,0,0.15);
    --elevation-4: 0 12px 32px rgba(0,0,0,0.18);
    --elevation-5: 0 16px 40px rgba(0,0,0,0.2);
}

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

body {
    font-family: 'Inter', 'Roboto', 'Poppins', '思源黑体', system-ui, -apple-system, sans-serif;
    font-weight: 400;
    background: var(--primary-blue);
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-primary);
    line-height: 1.6;
}

/* 字体排版系统 */
h1 { 
    font-size: 48px; 
    font-weight: 700; 
    color: var(--text-white); 
    margin-bottom: 8px; 
}

h2 { 
    font-size: 36px; 
    font-weight: 600; 
    color: var(--text-primary); 
    margin-bottom: 12px; 
}

h3 { 
    font-size: 24px; 
    font-weight: 600; 
    color: var(--text-primary); 
    margin-bottom: 8px; 
}

h4 { 
    font-size: 18px; 
    font-weight: 500; 
    color: var(--text-primary); 
    margin-bottom: 4px; 
}

p { 
    font-size: 16px; 
    font-weight: 300; 
    color: var(--text-secondary); 
}

/* 玻璃拟态容器 */
.glass-container {
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: var(--glass-bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    margin: 20px;
    padding: 40px;
    box-shadow: var(--glass-shadow-medium);
}

/* 头部样式 */
.glass-header {
    text-align: center;
    margin-bottom: 40px;
}

.glass-header h1 {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 12px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.glass-header p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 24px;
}

/* 搜索容器 */
.search-container {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 24px auto 0;
    max-width: 400px;
}

.glass-search {
    flex: 1;
    background: var(--glass-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 16px 20px;
    color: var(--text-white);
    font-size: 16px;
    transition: all 0.3s ease;
}

.glass-search::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.glass-search:focus {
    outline: none;
    background: var(--glass-bg-hover);
    box-shadow: 0 0 0 2px var(--accent-orange);
    transform: translateY(-2px);
}

.search-btn {
    background: var(--accent-orange);
    border: none;
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    color: white;
}

.search-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--elevation-2);
}

/* 增强版网格布局 - 固定3列布局 */
.enhanced-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
    /* 确保卡片高度一致 */
    align-items: stretch;
}

/* 基础玻璃拟态卡片 */
.glass-card {
    position: relative;
    background: var(--glass-bg-primary);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 180px;
}

/* 卡片悬浮效果 */
.glass-card:hover {
    transform: translateY(-6px) scale(1.02);
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
    box-shadow: var(--glass-shadow-hover);
}

/* 卡片图标样式 */
.card-icon {
    font-size: 36px;
    margin-bottom: 12px;
    display: block;
}

/* 卡片内容区域 */
.card-content h3 {
    color: var(--text-white);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.card-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 300;
    margin-bottom: 16px;
}

/* 卡片统计信息 */
.card-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.file-count {
    color: rgba(255, 255, 255, 0.9);
    font-size: 12px;
    font-weight: 400;
}

/* 进度条样式 */
.progress-bar {
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-orange);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* 子页面样式 */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 20px;
    position: relative;
}

.back-button {
    background: var(--glass-bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px 20px;
    color: var(--text-white);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-button:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--elevation-2);
}

.page-title {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    width: auto;
    min-width: 300px;
}

.page-title h1 {
    font-size: 36px;
    margin-bottom: 8px;
}

.page-title p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
}

/* 内容区域 */
.content-section {
    background: var(--glass-bg-primary);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--glass-shadow-soft);
}

.content-section h2 {
    color: var(--text-white);
    font-size: 28px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-section h3 {
    color: var(--text-white);
    font-size: 20px;
    margin-bottom: 12px;
    margin-top: 24px;
}

.content-section h4 {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    margin-bottom: 8px;
    margin-top: 16px;
}

.content-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 12px;
}

.content-section ul, .content-section ol {
    color: rgba(255, 255, 255, 0.8);
    margin-left: 20px;
    margin-bottom: 16px;
}

.content-section li {
    margin-bottom: 8px;
    line-height: 1.5;
}

/* 链接样式 */
.content-section a {
    color: var(--accent-orange);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 1px solid transparent;
}

.content-section a:hover {
    color: var(--accent-orange-light);
    border-bottom-color: var(--accent-orange-light);
}

/* 表格样式 */
.content-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--glass-bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--elevation-1);
}

.content-table th,
.content-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.content-table th {
    background: var(--glass-bg-hover);
    color: var(--text-white);
    font-weight: 600;
    font-size: 14px;
}

.content-table td {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
}

.content-table tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* 提示框样式 */
.tip-box {
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(255, 107, 53, 0.05));
    border: 1px solid rgba(255, 107, 53, 0.3);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    position: relative;
}

.tip-box::before {
    content: "💡";
    font-size: 20px;
    margin-right: 8px;
}

.tip-box p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
}

/* 按钮样式 */
.modern-button {
    background: var(--accent-orange);
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.modern-button:hover {
    background: var(--accent-orange-light);
    transform: translateY(-2px);
    box-shadow: var(--elevation-3);
}

.modern-button.secondary {
    background: var(--glass-bg-secondary);
    border: 1px solid var(--glass-border);
    color: var(--text-white);
}

.modern-button.secondary:hover {
    background: var(--glass-bg-hover);
}

/* 响应式设计 */
/* 超大屏幕 (1440px+) - 保持3列布局 */
@media (min-width: 1440px) {
    .enhanced-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
}

/* 桌面端 (1024px - 1439px) - 保持3列布局 */
@media (min-width: 1024px) and (max-width: 1439px) {
    .enhanced-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

/* 中等桌面屏幕 (900px - 1023px) - 保持3列但调整间距 */
@media (min-width: 900px) and (max-width: 1023px) {
    .glass-container {
        margin: 16px;
        padding: 24px;
    }

    .enhanced-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }

    .glass-card {
        padding: 20px;
    }

    h1 { font-size: 36px; }
    h2 { font-size: 28px; }
    h3 { font-size: 20px; }

    .image-cards-section {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 16px;
    }
}

/* 平板端横屏 (768px - 899px) - 改为2列布局 */
@media (min-width: 768px) and (max-width: 899px) {
    .glass-container {
        margin: 16px;
        padding: 24px;
    }

    .enhanced-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    h1 { font-size: 36px; }
    h2 { font-size: 28px; }
    h3 { font-size: 20px; }

    .image-cards-section {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

/* 平板端竖屏 (481px - 767px) - 改为2列布局 */
@media (min-width: 481px) and (max-width: 767px) {
    .glass-container {
        margin: 12px;
        padding: 20px;
    }

    .enhanced-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .glass-card {
        min-height: 160px;
        padding: 16px;
    }

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

    h1 { font-size: 28px; }
    h2 { font-size: 24px; }
    h3 { font-size: 18px; }

    .image-cards-section {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 12px;
    }

    .page-header {
        flex-direction: column;
        text-align: center;
        position: static;
    }

    .page-title {
        position: static;
        transform: none;
        left: auto;
        width: 100%;
        min-width: auto;
    }

    .page-title h1 {
        font-size: 28px;
    }
}

/* 移动端 (320px - 480px) - 单列布局 */
@media (max-width: 480px) {
    .glass-container {
        margin: 8px;
        padding: 16px;
    }

    .enhanced-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .glass-card {
        min-height: 140px;
        padding: 16px;
    }

    h1 { font-size: 24px; }
    h2 { font-size: 20px; }
    h3 { font-size: 16px; }
    h4 { font-size: 14px; }

    .card-content h3 { font-size: 16px; }
    .card-content p { font-size: 12px; }

    .page-header {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        position: static;
    }

    .page-title {
        position: static;
        transform: none;
        left: auto;
        width: 100%;
        min-width: auto;
    }

    .page-title h1 {
        font-size: 24px;
    }

    .content-section {
        padding: 20px;
    }

    .content-section h2 {
        font-size: 22px;
    }

    .content-table th,
    .content-table td {
        padding: 12px 8px;
        font-size: 12px;
    }

    .image-cards-section {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* 快速导航链接样式 */
.quick-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    margin-top: 20px;
    margin-bottom: 20px;
}

.quick-nav-link {
    display: block;
    background: linear-gradient(135deg,
        rgba(255, 107, 53, 0.1),
        rgba(255, 107, 53, 0.05)
    );
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid var(--accent-orange);
    border-radius: 12px;
    padding: 16px 20px;
    margin: 4px;
    text-decoration: none;
    color: var(--text-white);
    font-size: 16px;
    font-weight: 500;
    line-height: 1.4;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    z-index: 1;
    box-sizing: border-box;
    /* 确保边框完全可见 */
    overflow: visible;
    isolation: isolate;
}

.quick-nav-link:hover {
    background: linear-gradient(135deg,
        rgba(255, 107, 53, 0.2),
        rgba(255, 107, 53, 0.1)
    );
    border-color: var(--accent-orange-light);
    border-width: 2px;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
    color: var(--text-white);
    z-index: 2;
    /* 确保悬停时边框仍然完全可见 */
    overflow: visible;
}

/* 快速导航响应式设计 */
@media (max-width: 768px) {
    .quick-nav-grid {
        grid-template-columns: 1fr;
        gap: 14px;
        margin-bottom: 24px;
    }

    .quick-nav-link {
        padding: 14px 16px;
        font-size: 14px;
        margin: 4px;
        /* 移动端确保边框可见 */
        overflow: visible;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .quick-nav-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
        margin-bottom: 24px;
    }

    .quick-nav-link {
        font-size: 15px;
        margin: 4px;
        /* 平板端确保边框可见 */
        overflow: visible;
    }
}

@media (min-width: 1025px) {
    .quick-nav-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
        margin-bottom: 24px;
    }

    .quick-nav-link {
        margin: 4px;
        /* 桌面端确保边框可见 */
        overflow: visible;
    }
}

/* 页面过渡动画 */
.page-transition {
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.3s ease;
}

.page-transition.loaded {
    opacity: 1;
    transform: scale(1);
}

/* 图片卡片样式 - 原尺寸显示 */
.card-image {
    width: 100%;
    height: auto;
    max-width: 100%;
    border-radius: 12px;
    margin-bottom: 12px;
    transition: all 0.3s ease;
    display: block;
}

.glass-card:hover .card-image {
    transform: scale(1.02);
    border-radius: 16px;
}

/* 图片卡片容器 */
.image-cards-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

/* 图片卡片特殊样式 */
.glass-card.image-card {
    min-height: auto;
    padding: 20px;
}