/* 
 * VTuber经纪人游戏网站样式
 * 日韩风格都市轻小说主题
 * 主色调：白色+淡紫色+淡青色
 */

/* 自定义CSS变量 - 日韩风配色方案 */
:root {
    --primary-color: #8B5FBF;          /* 淡紫色主色 */
    --secondary-color: #5FB3BF;        /* 淡青色辅色 */
    --accent-color: #BF8B9F;           /* 粉紫色点缀 */
    --light-purple: #F0E6FF;           /* 浅紫色背景 */
    --light-cyan: #E6F7FF;             /* 浅青色背景 */
    --soft-white: #FEFEFE;             /* 柔和白色 */
    --text-primary: #2D3748;           /* 主文字颜色 */
    --text-secondary: #718096;         /* 次要文字颜色 */
    --shadow-soft: 0 4px 20px rgba(139, 95, 191, 0.1);
    --shadow-hover: 0 8px 30px rgba(139, 95, 191, 0.2);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局样式重置和基础设置 */
* {
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--soft-white) 0%, var(--light-purple) 50%, var(--light-cyan) 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 - 日韩风格 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-purple);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
}

/* 导航栏样式 */
.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
    border-bottom: 1px solid rgba(139, 95, 191, 0.1);
    transition: var(--transition);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color) !important;
    text-shadow: 0 2px 4px rgba(139, 95, 191, 0.1);
}

.navbar-nav .nav-link {
    font-weight: 500;
    color: var(--text-primary) !important;
    margin: 0 0.5rem;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
    background: var(--light-purple);
    transform: translateY(-2px);
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.navbar-nav .nav-link:hover::after {
    width: 80%;
    left: 10%;
}

/* 英雄区域样式 */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 50%, var(--accent-color) 100%);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.15"/><circle cx="20" cy="80" r="0.5" fill="white" opacity="0.15"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
}

.min-vh-75 {
    min-height: 75vh;
}

/* 按钮样式 - 日韩风格 */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 2rem;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn::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);
}

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

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-light {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    box-shadow: var(--shadow-soft);
}

.btn-light:hover {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-outline-light {
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: white;
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
    color: white;
    transform: translateY(-2px);
}

/* 卡片样式 */
.feature-card, .update-card, .screenshot-item {
    transition: var(--transition);
    border: 1px solid rgba(139, 95, 191, 0.1);
    position: relative;
    overflow: hidden;
}

.feature-card::before, .update-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover, .update-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.feature-card:hover::before, .update-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--light-purple), var(--light-cyan));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

/* 截图画廊样式 */
.screenshot-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}

.screenshot-item img {
    transition: var(--transition);
    width: 100%;
    height: auto;
}

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

.screenshot-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(139, 95, 191, 0.1), rgba(95, 179, 191, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.screenshot-item:hover::after {
    opacity: 1;
}

/* 手风琴样式 */
.accordion-item {
    border: 1px solid rgba(139, 95, 191, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.accordion-button {
    background: var(--light-purple);
    border: none;
    color: var(--text-primary);
    font-weight: 600;
    padding: 1.25rem;
}

.accordion-button:not(.collapsed) {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: none;
}

.accordion-button:focus {
    box-shadow: 0 0 0 0.25rem rgba(139, 95, 191, 0.25);
}

.accordion-body {
    background: white;
    padding: 1.5rem;
    border-top: 1px solid rgba(139, 95, 191, 0.1);
}

/* 内容区块样式 */
.content-block h3 {
    color: var(--primary-color);
    position: relative;
    padding-left: 1rem;
}

.content-block h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 1.5rem;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 背景装饰 */
section {
    position: relative;
}

section:nth-child(even) {
    background: rgba(240, 230, 255, 0.3);
}

section:nth-child(odd) {
    background: rgba(230, 247, 255, 0.3);
}

/* 页脚样式 */
footer {
    background: linear-gradient(135deg, #2D3748 0%, var(--primary-color) 100%) !important;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

/* 返回顶部按钮 */
#backToTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border: none;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

#backToTop.show {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#backToTop:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px) scale(1.1);
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
}

#backToTop:active {
    transform: translateY(-1px) scale(0.95);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 3rem 0;
        text-align: center;
    }
    
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .feature-card {
        margin-bottom: 2rem;
    }
    
    .btn {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
    }
    
    /* 移动端返回顶部按钮优化 */
    #backToTop {
        bottom: 15px;
        right: 15px;
        width: 45px;
        height: 45px;
        font-size: 16px;
    }
}

@media (max-width: 576px) {
    .hero-section .display-4 {
        font-size: 1.75rem;
    }
    
    .lead {
        font-size: 1rem;
    }
    
    .btn {
        display: block;
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .d-flex.gap-3 {
        flex-direction: column;
        gap: 0.5rem !important;
    }
}

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

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

/* 滚动动画 */
.fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

/* 特殊效果 */
.text-gradient {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 图片优化 */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}

/* 加载动画 */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* 可访问性增强 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 焦点样式 */
*:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .navbar, footer, #backToTop {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero-section {
        background: white;
        color: black;
    }
}