* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-y: scroll;
}

body {
    font-family: 'Microsoft YaHei', 'SimHei', sans-serif;
    line-height: 1.6;
    color: #e2e8f0;
    background: linear-gradient(180deg, #0a0a1a 0%, #0d1033 30%, #0a1628 60%, #050510 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 宇宙深空背景 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    background-image: 
        radial-gradient(1px 1px at 10% 10%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 20% 35%, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 30% 15%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 50% 25%, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 70% 45%, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 90% 20%, rgba(255,255,255,0.6), transparent);
    animation: stars-twinkle 4s ease-in-out infinite;
}

@keyframes stars-twinkle {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    padding: 0 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    z-index: 1000;
    background: rgba(10, 10, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(167, 139, 250, 0.2);
}

.nav-brand {
    font-size: 1.5em;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    flex-shrink: 0;
    position: relative;
    letter-spacing: 3px;
    margin-right: 15px;
    background: linear-gradient(90deg, #667eea 0%, #a78bfa 50%, #667eea 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: logo-shine 3s linear infinite;
    text-shadow: 0 0 20px rgba(102, 126, 234, 0.5);
}

@keyframes logo-shine {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.nav-logo {
    display: none;
}

/* 热门导航 */
.hot-nav {
    display: flex;
    align-items: center;
    gap: 35px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.hot-nav::-webkit-scrollbar {
    display: none;
}

.hot-nav a {
    flex-shrink: 0;
    font-size: 0.95em;
    color: #cbd5e1;
    text-decoration: none;
    transition: color 0.3s;
    white-space: nowrap;
    line-height: 1;
    display: inline-block;
}

.hot-nav a:hover {
    color: #a78bfa;
}

/* 汉堡菜单按钮 - PC端隐藏 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #cbd5e1;
    margin: 5px 0;
    transition: all 0.3s;
}

/* 面包屑导航 */
.breadcrumb {
    max-width: 900px;
    margin: 0 auto;
    padding: 85px 20px 0;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-list a {
    color: #a78bfa;
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb-list a:hover {
    color: #c4b5fd;
}

.breadcrumb-separator {
    color: rgba(255, 255, 255, 0.3);
}

.breadcrumb-current {
    color: rgba(255, 255, 255, 0.7);
}

/* 主内容区 */
.detail-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 20px 60px;
}

/* 头部区域 */
.detail-header {
    text-align: center;
    margin-bottom: 40px;
}

.detail-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3), rgba(167, 139, 250, 0.3));
    border: 2px solid rgba(167, 139, 250, 0.5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5em;
}

.detail-header h1 {
    font-size: 2.2em;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #667eea, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.detail-subtitle {
    color: rgba(255, 255, 255, 0.6);
    font-size: 1.05em;
    letter-spacing: 1px;
}

/* 内容卡片 */
.detail-card {
    background: rgba(26, 31, 58, 0.6);
    border: 1px solid rgba(167, 139, 250, 0.2);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 25px;
}

.detail-card h2 {
    color: #a78bfa;
    font-size: 1.2em;
    margin-bottom: 15px;
}

.detail-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.9;
    margin-bottom: 12px;
}

/* 特性列表 */
.feature-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.feature-list li {
    color: rgba(255, 255, 255, 0.8);
    padding: 12px 15px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    border-left: 3px solid #a78bfa;
}

/* CTA区域 */
.cta-section {
    text-align: center;
    padding: 40px 25px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(167, 139, 250, 0.15));
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 16px;
    margin-bottom: 25px;
}

.cta-stats {
    display: flex;
    justify-content: center;
    gap: 35px;
    margin-bottom: 25px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.6em;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85em;
    margin-top: 5px;
}

.cta-button {
    display: inline-block;
    padding: 16px 50px;
    background: linear-gradient(135deg, #667eea, #a78bfa);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-size: 1.1em;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(102, 126, 234, 0.4);
}

/* 推荐区域 */
.recommend-section {
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid rgba(167, 139, 250, 0.2);
}

.recommend-title {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85em;
    margin-bottom: 15px;
}

.recommend-card {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 15px 25px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s;
}

.recommend-card:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: rgba(167, 139, 250, 0.5);
    transform: translateY(-2px);
}

.recommend-icon {
    font-size: 1.5em;
}

.recommend-info {
    text-align: left;
}

.recommend-name {
    color: #e2e8f0;
    font-size: 1em;
    font-weight: 600;
    margin-bottom: 3px;
}

.recommend-desc {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8em;
}

.recommend-arrow {
    color: #a78bfa;
    font-size: 1.2em;
    transition: transform 0.3s;
}

.recommend-card:hover .recommend-arrow {
    transform: translateX(5px);
}

/* 报告包含区域 */
.includes {
    background: rgba(26, 31, 58, 0.6);
    border: 1px solid rgba(167, 139, 250, 0.2);
    border-radius: 20px;
    padding: 40px;
    margin-top: 40px;
}

.includes h2 {
    color: #a78bfa;
    font-size: 1.3em;
    margin-bottom: 25px;
    text-align: center;
}

.includes-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.includes-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 18px 20px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 12px;
    border-left: 3px solid #a78bfa;
    transition: all 0.3s;
}

.includes-item:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: translateX(5px);
}

.includes-item-title {
    color: #e2e8f0;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.includes-item-title::before {
    content: '✓';
    color: #a78bfa;
    font-weight: bold;
}

.includes-item-desc {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85em;
    padding-left: 22px;
}

/* FAQ区域 */
.faq-section {
    margin-top: 25px;
}

.faq-section h2,
.faq-title {
    text-align: center;
    font-size: 1.5em;
    font-weight: bold;
    background: linear-gradient(90deg, #667eea, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item:hover {
    border-color: rgba(167, 139, 250, 0.4);
}

.faq-question-text {
    color: #e2e8f0;
    font-size: 1em;
    font-weight: 500;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
    background: rgba(167, 139, 250, 0.2);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer-content {
    padding: 0 20px 18px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    font-size: 0.9em;
    border-top: 1px solid rgba(167, 139, 250, 0.1);
    padding-top: 15px;
}

.faq-item {
    background: rgba(26, 31, 58, 0.6);
    border: 1px solid rgba(167, 139, 250, 0.2);
    border-radius: 10px;
    margin-bottom: 10px;
    overflow: hidden;
}

.faq-question {
    padding: 16px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: background 0.3s;
}

.faq-question:hover {
    background: rgba(167, 139, 250, 0.1);
}

.faq-question span:first-child {
    color: #e2e8f0;
    font-size: 0.95em;
}

.faq-toggle {
    width: 24px;
    height: 24px;
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #a78bfa;
    font-size: 1em;
    flex-shrink: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 18px 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
    font-size: 0.9em;
    border-top: 1px solid rgba(167, 139, 250, 0.1);
    padding-top: 12px;
}

/* 底部 */
.footer {
    text-align: center;
    padding: 50px 20px;
    color: white;
    margin-top: 40px;
    background: transparent;
    border-top: 1px solid rgba(167, 139, 250, 0.2);
}

.footer-logo {
    font-size: 1.8em;
    font-weight: bold;
    background: linear-gradient(135deg, #667eea 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-slogan {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.95em;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 25px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.9em;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #a78bfa;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.85em;
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar {
        height: 52px;
        padding: 0 15px;
        justify-content: space-between;
        overflow: visible;
    }
    
    .nav-brand {
        font-size: 1.1em;
        letter-spacing: 2px;
        flex-shrink: 0;
    }
    
    /* 汉堡菜单按钮 - 移动端显示 */
    .menu-toggle {
        display: block;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    /* 移动端菜单 */
    .hot-nav {
        position: fixed;
        top: 52px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.98);
        flex-direction: column;
        padding: 15px 20px;
        gap: 0;
        display: none;
        border-bottom: 1px solid rgba(167, 139, 250, 0.2);
        max-height: calc(100vh - 52px);
        overflow-y: auto;
    }
    
    .hot-nav.active {
        display: flex;
    }
    
    .hot-nav a {
        font-size: 1em;
        padding: 12px 0;
        border-bottom: 1px solid rgba(167, 139, 250, 0.1);
        width: 100%;
    }
    
    .hot-nav a:last-child {
        border-bottom: none;
    }
    
    .breadcrumb {
        padding: 60px 15px 0;
    }
    
    .detail-container {
        padding: 15px 15px 50px;
    }
    
    .detail-header h1 {
        font-size: 1.8em;
    }
    
    .detail-card {
        padding: 22px;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
    }
    
    .cta-section {
        padding: 30px 20px;
    }
    
    .cta-stats {
        gap: 20px;
    }
    
    .stat-number {
        font-size: 1.3em;
    }
    
    .cta-button {
        padding: 14px 35px;
        font-size: 1em;
    }
    
    .includes {
        padding: 25px;
    }
    
    .includes-list {
        grid-template-columns: 1fr;
    }
}