/* 
 * 香港學術論文查重系統 - 学术风格样式表
 * 采用稳重配色方案（深蓝、灰、白）
 */

/* 基础样式重置与变量 */
:root {
    /* 主色调 - 稳重学术风格 */
    --color-primary: #1a365d;      /* 深蓝色 - 主色 */
    --color-primary-light: #2a4a7f; /* 浅蓝色 - 辅助色 */
    --color-secondary: #718096;    /* 灰蓝色 - 次要色 */
    --color-text: #1a202c;         /* 更深灰色 - 主文本 */
    --color-text-light: #4a5568;   /* 更深灰色 - 次要文本 */
    --color-bg: #F8F8F8;           /* 白色 - 背景色 */
    --color-bg-alt: #f7fafc;       /* 浅灰色 - 次要背景 */
    --color-border: #e2e8f0;       /* 浅灰色 - 边框色 */
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 字体 */
    --font-sans: 'Noto Sans HK', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif HK', Georgia, serif;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.1);
    --shadow-color: rgba(0, 0, 0, 0.2);
    
    /* 圆角 */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    
    /* 过渡和动画 */
    --transition: all 0.3s ease;
    --transition-bezier: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-duration: 0.5s;
    --image-transition: 0.8s cubic-bezier(0.25, 1, 0.5, 1);
    
    /* 交互效果 */
    --hover-scale: 1.05;
    --active-scale: 0.95;
    
    /* 特效颜色 */
    --glow-color: rgba(26, 54, 93, 0.3);
    --glow-color-light: rgba(26, 54, 93, 0.2);
    --highlight-color: rgba(255, 255, 255, 0.1);
    --logo-shadow-hover: 0 10px 25px rgba(26, 54, 93, 0.15);
    
    /* Logo特效变量 */
    --logo-glow-color: rgba(26, 54, 93, 0.4);
    --logo-transition-duration: 0.5s;
    --logo-hover-scale: 1.08;
    --logo-active-scale: 0.98;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 可复用图片样式 */
.img-cover {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.img-placeholder {
    width: 100%;
    height: 100%;
    background: #1a365d;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

/* 居中显示容器 */
.text-center {
    text-align: center;
}

.mt-3 {
    margin-top: 3rem;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-light);
}

img {
    max-width: 100%;
    height: auto;
}

/* 容器 */
/* 通用卡片基础样式 - 减少重复代码 */
.card-base {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    transition: var(--transition);
}

.card-base:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.card-image-base {
    overflow: hidden;
    position: relative;
}

.card-image-base img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--image-transition);
}

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

.card-logo-base {
    border-radius: 50%;
    background-color: var(--color-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-logo-base img {
    width: 80%;
    height: 80%;
    object-fit: contain;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--color-bg);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.header.scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-md);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.logo-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.logo:hover .logo-img::before {
    left: 100%;
}

.logo:hover .logo-img {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 4px 20px rgba(42, 74, 127, 0.15);
}

.logo:active .logo-img {
    transform: scale(0.95);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.125rem;
    line-height: 1.2;
    transition: all 0.3s ease;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-light);
    transition: all 0.3s ease;
}

.logo:hover .logo-title {
    color: var(--color-primary-light);
    transform: translateX(2px);
}

.logo:hover .logo-subtitle {
    color: var(--color-primary);
    opacity: 0.8;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: #ff6b35;
    transform: translateX(-50%);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text);
}

/* 英雄区域 */
.hero {
    padding: 8rem 0 5rem;
    background-color: var(--color-bg);
    position: relative;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-text {
    flex: 1;
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-image {
    flex: 1;
    position: relative;
}

.hero-img {
    width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.hero-badge {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--color-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-badge-icon {
    font-size: 1rem;
    font-weight: 700;
}

/* 特色区域 */
.features {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.feature-link {
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.feature-link span {
    transition: var(--transition);
}

.feature-link:hover span {
    transform: translateX(3px);
}

/* 系统介绍 */
.system {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
}

.system-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.system-text {
    flex: 1;
}

.system h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.system p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.system-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.system-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.system-feature-icon {
    color: var(--color-primary);
    font-weight: 700;
}

.system-feature-text {
    font-size: 0.875rem;
}

.system-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.system-image img {
    max-width: 100%;
    max-height: 400px;
}

/* 新闻区域 */
.news {
    padding: var(--spacing-xl) 0;
}

.news-ticker {
    background-color: var(--color-bg-alt);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.news-ticker-content {
    display: flex;
    animation: ticker 30s linear infinite;
    white-space: nowrap;
}

.news-ticker-item {
    margin-right: 3rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.news-ticker-date {
    color: var(--color-text-light);
    font-size: 0.875rem;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.news-card {
    border: 1px solid var(--color-border);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.news-card-image {
    height: 200px;
    position: relative;
    overflow: hidden;
}

.news-card-date {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--color-primary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
}

.news-card-content {
    padding: var(--spacing-md);
}

.news-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.news-card-title a {
    color: var(--color-primary);
}

.news-card-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.news-card-link {
    font-weight: 500;
    font-size: 0.875rem;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.news-card-link span {
    transition: var(--transition);
}

.news-card-link:hover span {
    transform: translateX(3px);
}

/* 大学展示 */
.universities {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-bg-alt);
    text-align: center;
}

.universities-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.universities p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.universities-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.university-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.university-logo-img {
    width: 80px;
    height: 80px;
    background-color: #ffffff;  ;
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.university-name {
    font-size: 0.875rem;
    color: var(--color-text);
}

/* 即时检测工具样式 */
.instant-check-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.upload-area {
    max-width: 600px;
    margin: 0 auto;
}

.upload-zone {
    background: white;
    border: 2px dashed var(--color-primary);
    border-radius: 20px;
    padding: 60px 40px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-zone:hover {
    border-color: var(--color-primary-light);
    background: rgba(42, 74, 127, 0.05);
    transform: translateY(-2px);
}

.upload-zone.dragover {
    border-color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.upload-icon {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.upload-zone h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: var(--color-text);
}

.upload-zone p {
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.upload-progress {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 20px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 4px;
}

.upload-result {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.file-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--color-bg-alt);
    border-radius: 10px;
}

.file-info i {
    font-size: 2rem;
    color: var(--color-primary);
}

.file-info div span {
    display: block;
}

.file-info div span:first-child {
    font-weight: 600;
    color: var(--color-text);
}

.file-info div span:last-child {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.quick-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.stat {
    text-align: center;
    padding: 20px;
    background: var(--color-bg-alt);
    border-radius: 10px;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 5px;
}

.stat-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* 页脚 */
.footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
}

.footer-contact {
    margin-bottom: var(--spacing-md);
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
}

.footer-contact-icon {
    width: 32px;
    height: 32px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.footer-contact-icon i {
    font-size: 1rem;
    color: white;
}

.footer-contact-item:hover .footer-contact-icon {
    background-color: white;
    transform: scale(1.1);
}

.footer-contact-item:hover .footer-contact-icon i {
    color: var(--color-primary);
}

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

.footer-social-link {
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-social-link:hover {
    background-color: white;
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* 社交媒体图标特殊颜色 */
.footer-social-link.facebook:hover {
    background-color: #1877F2;
    color: white;
}

.footer-social-link.instagram:hover {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: white;
}

.footer-social-link.twitter:hover {
    background-color: #000000;
    color: white;
}

.footer-social-link.linkedin:hover {
    background-color: #0A66C2;
    color: white;
}

.footer-heading {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.footer-links {
    list-style: none;
}

.footer-link {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
}

.footer-link a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-link a i {
    font-size: 0.75rem;
    opacity: 0;
    transform: translateX(-5px);
    transition: all 0.3s ease;
}

.footer-link a:hover {
    color: white;
}

.footer-link a:hover i {
    opacity: 1;
    transform: translateX(0);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-copyright {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-bottom-link {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-link:hover {
    color: white;
}

/* 动画效果 */
@keyframes ticker {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shine {
    0% { left: -100%; }
    30%, 100% { left: 150%; }
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(26, 54, 93, 0.7);
    }
    70% {
        transform: scale(1.1);
        box-shadow: 0 0 0 6px rgba(26, 54, 93, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(26, 54, 93, 0);
    }
}

/* 动画类 */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero h1 { font-size: 2.25rem; }
    .section-title, .system h2 { font-size: 1.75rem; }
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 7rem 0 3rem;
    }
    
    .hero-content, .system-content {
        flex-direction: column;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        display: none;
    }
    
    .nav.active {
        display: flex;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title, .system h2 {
        font-size: 1.5rem;
    }
    
    .system-features {
        grid-template-columns: 1fr;
    }
}

/* 查重页面特有样式 */
.check-layout .check-layout-row {
    align-items: flex-start;
    margin: 0 -15px;
}

.check-layout .check-layout-row > [class*="col-"] {
    padding: 0 15px;
}

/* 左侧选择栏 - 精确25%宽度 */
.check-layout .col-lg-3.col-md-3 {
    flex: 0 0 25%;
    max-width: 25%;
    padding-top: 0;
    margin-top: 0;
}

/* 右侧表单区域 - 精确75%宽度 */
.check-layout .col-lg-9.col-md-9 {
    flex: 0 0 75%;
    max-width: 75%;
    padding-top: 0;
    margin-top: 0;
}

/* 左右区域卡片样式 - 确保完美顶部对齐 */
.check-layout .check-sidebar,
.check-layout .check-main-content {
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    padding-top: 1.5rem !important;
    padding-bottom: 1.5rem !important;
    height: auto;
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

/* 确保内部元素顶部对齐 */
.check-layout .check-sidebar > *:first-child,
.check-layout .check-main-content > *:first-child {
    margin-top: 0 !important;
}

/* 精确控制网格间距 */
.check-layout .features-grid {
    margin-top: 0 !important;
    margin-bottom: 0 !important;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* 确保所有卡片顶部对齐 */
.check-layout .feature-card {
    margin-top: 0 !important;
    margin-bottom: 0 !important;
}

.check-layout .features-grid {
    margin-top: 0 !important;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.check-layout .nav {
    margin-top: 0 !important;
    padding-top: 0 !important;
    margin-bottom: 1rem;
}

/* 确保移动端响应式 */
@media (max-width: 768px) {
    .check-layout .col-lg-3.col-md-3,
    .check-layout .col-lg-9.col-md-9 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .check-layout .check-layout-row {
        flex-direction: column;
        gap: 1.5rem;
    }
}

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

.form-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

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

.dropzone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.dropzone:hover {
    border-color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

.dropzone .icon {
    font-size: 2rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.dropzone .title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.dropzone .description {
    color: var(--color-text-light);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* About页面特定样式 */
.team-member {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

.team-member.animate {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item {
    opacity: 0;
    transform: translateX(-30px);
    transition: var(--transition);
}

.timeline-item.animate {
    opacity: 1;
    transform: translateX(0);
}

/* Resources页面特定样式 */
.resource-card {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.resource-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Tools download section styles */
.tool-card {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

/* Terms页面特定样式 */
.terms-nav {
    position: sticky;
    top: 80px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    padding: 2rem;
    height: fit-content;
}

.terms-nav ul {
    list-style: none;
}

.terms-nav a {
    color: var(--color-text-light);
    text-decoration: none;
    padding: 0.5rem 0;
    display: block;
    border-left: 3px solid transparent;
    padding-left: 1rem;
    transition: var(--transition);
}

.terms-nav a:hover,
.terms-nav a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    padding-left: 1.5rem;
}

.terms-content {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    padding: 2.5rem;
    margin-bottom: 2rem;
}

.terms-content h2 {
    color: var(--color-primary);
    margin: 2rem 0 1rem;
    font-family: var(--font-serif);
}

.terms-content h3 {
    color: var(--color-primary);
    margin: 1.5rem 0 1rem;
}

.terms-content p {
    line-height: 1.8;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.terms-content ul {
    margin-left: 2rem;
    margin-bottom: 1rem;
}

.terms-content li {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}