/* 全局样式 */
:root {
    --primary-color: #7e57c2;
    --primary-dark: #4d2c91;
    --primary-light: #b085f5;
    --secondary-color: #ff7043;
    --dark-bg: #1e1e2f;
    --light-bg: #f8f9fa;
    --gray-bg: #f0f2f5;
    --white-bg: #ffffff;
    --text-light: #f5f5f5;
    --text-dark: #333;
    --text-muted: #6c757d;
    --heading-color: #3a3a3a;
    --border-radius: 8px;
    --box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text-dark);
    scroll-behavior: smooth;
    overflow-x: hidden;
    line-height: 1.6;
    background-color: var(--light-bg);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', sans-serif;
    color: var(--heading-color);
    font-weight: 600;
    line-height: 1.3;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 文本选择效果 */
::selection {
    background-color: var(--primary-light);
    color: white;
}

/* 导航栏样式 */
.navbar {
    transition: var(--transition-normal);
    padding: 15px 0;
}

.navbar.scrolled {
    padding: 8px 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.navbar-brand img {
    transition: transform 0.3s ease;
}

.navbar-brand:hover img {
    transform: scale(1.1) rotate(5deg);
}

.navbar-nav {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.nav-item {
    margin: 0 10px;
}

.nav-link {
    position: relative;
    color: var(--text-light) !important;
    font-weight: 500;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--secondary-color);
    transition: var(--transition-normal);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero 部分样式 */
.hero-section {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--dark-bg), #2d2d44);
    min-height: calc(100vh - 76px); /* 减去导航栏的高度 */
    display: flex;
    align-items: center;
}

.hero-section .container {
    padding-top: 2rem;
    padding-bottom: 2rem;
}

.hero-section h1 {
    animation: fadeInUp 1s ease-out;
}

.hero-section p {
    animation: fadeInUp 1s ease-out 0.3s;
    animation-fill-mode: both;
}

.hero-section .btn {
    animation: fadeInUp 1s ease-out 0.6s;
    animation-fill-mode: both;
}

.hero-section img {
    animation: fadeInRight 1s ease-out 0.3s;
    animation-fill-mode: both;
    transition: var(--transition-slow);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.hero-section img:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

/* 视频部分样式 */
.video-section {
    background: linear-gradient(to bottom, var(--dark-bg) 0%, #2a2a40 100%);
    color: var(--text-light);
    padding: 5rem 0;
}

.video-section .section-title {
    color: var(--text-light);
}

.video-section .ratio {
    transition: var(--transition-normal);
}

.video-section .ratio:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

/* 卡片悬停效果 */
.hover-card {
    transition: var(--transition-normal);
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.hover-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15) !important;
}

.card-img-container {
    overflow: hidden;
    border-top-left-radius: var(--border-radius);
    border-top-right-radius: var(--border-radius);
}

.card-img-top {
    transition: var(--transition-slow);
    height: 200px;
    object-fit: cover;
}

.hover-card:hover .card-img-top {
    transform: scale(1.1);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-dark);
    transition: var(--transition-normal);
}

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

.favorites {
    display: flex;
    align-items: center;
}

.favorites i {
    transition: var(--transition-normal);
    margin-right: 5px;
}

.hover-card:hover .favorites i {
    transform: scale(1.2);
}

/* 标题样式 */
.section-title {
    font-size: 2.2rem;
    margin-bottom: 2.5rem;
    color: var(--primary-dark);
    text-transform: capitalize;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    transition: var(--transition-normal);
}

.section-title:hover::after {
    width: 120px;
}

/* 列表样式 */
.list-group-item {
    border-left: none;
    border-right: none;
    padding: 0.75rem 0;
    transition: var(--transition-normal);
    position: relative;
}

/* 自定义列表样式 */
ul.list-group-flush {
    margin-bottom: 2rem;
}

ul.list-group-flush li.list-group-item {
    padding-left: 1.8rem;
    padding-top: 0.8rem;
    padding-bottom: 0.8rem;
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    font-size: 1.05rem;
    line-height: 1.6;
}

ul.list-group-flush li.list-group-item::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.8rem;
    line-height: 1;
    transition: var(--transition-normal);
}

ul.list-group-flush li.list-group-item:hover::before {
    color: var(--secondary-color);
    transform: scale(1.2);
}

/* 按钮样式 */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: var(--transition-normal);
    border-radius: 30px;
    padding: 0.5rem 1.5rem;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::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: var(--transition-normal);
    z-index: -1;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(126, 87, 194, 0.3);
}

.btn-primary:hover::before {
    left: 100%;
}

/* 页脚样式 */
footer {
    background: linear-gradient(135deg, var(--dark-bg), #2d2d44);
}

footer a {
    transition: var(--transition-normal);
    position: relative;
    display: inline-block;
    padding: 3px 0;
}

footer a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: 0;
    left: 0;
    background-color: var(--secondary-color);
    transition: var(--transition-normal);
}

footer a:hover {
    color: var(--secondary-color) !important;
}

footer a:hover::after {
    width: 100%;
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .navbar-nav {
        margin-top: 1rem;
        justify-content: center;
    }
    
    .nav-item {
        margin: 0 8px;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .seo-section h2 {
        font-size: 1.7rem;
    }
    
    .seo-section h3 {
        font-size: 1.4rem;
    }
    
    .hero-section {
        min-height: calc(100vh - 70px);
    }
}

.hover-underline {
    text-underline-offset: 4px;  /* 调整下划线与文字的距离 */
    text-decoration-thickness: 1px;  /* 设置下划线粗细 */
    transition: text-decoration-thickness 0.2s;  /* 添加过渡效果 */
}

.hover-underline:hover {
    text-decoration-thickness: 2px;  /* 鼠标悬停时加粗下划线 */
}

@media (max-width: 576px) {
    .navbar-nav {
        flex-wrap: wrap;
    }
    
    .nav-item {
        margin: 5px;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .seo-section h2 {
        font-size: 1.5rem;
    }
    
    .seo-section h3 {
        font-size: 1.3rem;
    }
    
    .seo-section p {
        font-size: 1rem;
    }
}

/* 背景颜色统一 */
.mods-section {
    background: var(--white-bg);
    padding: 5rem 0;
    position: relative;
}

.mods-section::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 0;
    width: 100%;
    height: 50px;
    background: linear-gradient(to bottom, transparent, var(--white-bg));
}

.seo-section {
    background: linear-gradient(to bottom, var(--white-bg) 0%, var(--gray-bg) 100%);
    padding: 5rem 0;
}

/* 文本样式增强 */
.seo-section h2 {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
}

.seo-section h2::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 3px;
    background-color: var(--secondary-color);
    bottom: -8px;
    left: 0;
    transition: var(--transition-normal);
}

.seo-section h2:hover::after {
    width: 80px;
}

.seo-section h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
}

.seo-section h4 {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin: 1.2rem 0 0.8rem;
}

.seo-section p {
    font-size: 1.05rem;
    color: var(--text-dark);
    margin-bottom: 1.2rem;
    line-height: 1.7;
}

/* CTA区域增强 */
.cta {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 12px;
    padding: 3rem 2rem;
    margin-top: 3rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    color: white;
}

.cta h3 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.cta p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.cta .btn-primary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    font-size: 1.1rem;
    padding: 0.8rem 2rem;
}

.cta .btn-primary:hover {
    background-color: #e8603a;
    border-color: #e8603a;
}

/* 卡片样式增强 */
.card-title {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
}

.card-text {
    font-size: 1rem;
    line-height: 1.6;
}

/* Hero 部分响应式样式 */
.hero-title {
    font-size: 2.5rem; /* 移动端默认大小 */
}

.hero-subtitle {
    font-size: 1.5rem; /* 移动端默认大小 */
}

.hero-description {
    font-size: 1.1rem; /* 移动端默认大小 */
}

/* 中等屏幕及以上的样式 */
@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem; /* 桌面端更大的字体 */
    }
    
    .hero-subtitle {
        font-size: 1.75rem; /* 桌面端更大的字体 */
    }
    
    .hero-description {
        font-size: 1.25rem; /* 桌面端更大的字体 */
    }
}