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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #fff;
    background: linear-gradient(135deg, #0a0a0f 0%, #1a1a2e 50%, #0d0d15 100%);
    padding-top: 80px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.15);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    background: linear-gradient(135deg, #f472b6 0%, #fbbf24 50%, #f472b6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
    color: #fbbf24;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #f472b6 0%, #fbbf24 100%);
    transition: width 0.3s ease;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-header {
    display: inline-block;
    background: linear-gradient(135deg, #f472b6 0%, #fbbf24 100%);
    color: #fff;
    padding: 12px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(244, 114, 182, 0.25);
}

.btn-header:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(244, 114, 182, 0.4);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: #fff;
    transition: all 0.3s ease;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: rgba(15, 15, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        gap: 0;
        padding: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        padding: 15px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-link::after {
        display: none;
    }

    .header-actions {
        display: none;
    }
}


/* 顶部横幅区 */
.hero {
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: #fff;
    padding: 160px 0 140px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(244, 114, 182, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(251, 191, 36, 0.06) 0%, transparent 40%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(20px, -10px);
    }
}

@keyframes gradientMove {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    50% {
        transform: translateX(20px) translateY(-10px);
    }
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    font-weight: 800;
    background: linear-gradient(135deg, #fbbf24 0%, #f472b6 50%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: 50px;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.download-btn {
    display: inline-block;
    background: linear-gradient(135deg, #f472b6 0%, #fbbf24 100%);
    color: #fff;
    padding: 16px 48px;
    border-radius: 14px;
    text-decoration: none;
    font-size: 1.0625rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(244, 114, 182, 0.3);
    position: relative;
    overflow: hidden;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    transition: left 0.5s ease;
}

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

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(244, 114, 182, 0.4);
}

/* 核心功能区块 */
.features {
    padding: 120px 0;
    background: #0f172a;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 80px;
    color: #fbbf24;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-item {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(244, 114, 182, 0.1);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    background: rgba(30, 41, 59, 0.5);
    border-color: rgba(251, 191, 36, 0.3);
    box-shadow: 0 10px 40px rgba(251, 191, 36, 0.15);
}

.feature-item .icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 1.375rem;
    margin-bottom: 12px;
    color: #fbbf24;
    font-weight: 600;
}

.feature-item p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* 数据统计区 */
.stats {
    padding: 100px 0;
    background: linear-gradient(135deg, #f472b6 0%, #fbbf24 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 50px,
        rgba(255, 255, 255, 0.03) 50px,
        rgba(255, 255, 255, 0.03) 100px
    );
    animation: slide 20s linear infinite;
}

@keyframes slide {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(100px);
    }
}

.stats .container {
    position: relative;
    z-index: 1;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 50px;
    text-align: center;
}

.stat-item .number {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.stat-item .label {
    font-size: 1.1875rem;
    opacity: 0.95;
    font-weight: 500;
}

/* 多平台下载区 */
.platforms {
    padding: 120px 0;
    background: #0f172a;
}

.platforms h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #fbbf24;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.platforms .subtitle {
    text-align: center;
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 60px;
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.platform-item {
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.1);
    padding: 45px 35px;
    border-radius: 24px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
}

.platform-item:hover {
    transform: translateY(-8px);
    background: rgba(139, 92, 246, 0.08);
    border-color: rgba(139, 92, 246, 0.2);
    box-shadow: 0 20px 60px rgba(139, 92, 246, 0.15);
}

.platform-item .icon {
    font-size: 3.5rem;
    display: block;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 12px rgba(233, 69, 96, 0.3));
}

.platform-item h4 {
    font-size: 1.375rem;
    margin-bottom: 10px;
    color: #fff;
    font-weight: 700;
}

.platform-item p {
    color: #a0a0a0;
    margin-bottom: 25px;
}

.btn-download {
    display: inline-block;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    color: #fff;
    padding: 14px 40px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.4);
}

/* 用户评价区 */
.testimonials {
    padding: 120px 0;
    background: #0f172a;
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 70px;
    color: #fbbf24;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-item {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(244, 114, 182, 0.15);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    background: rgba(30, 41, 59, 0.5);
    border-color: rgba(251, 191, 36, 0.25);
    box-shadow: 0 10px 30px rgba(251, 191, 36, 0.15);
}

.testimonial-item .avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f472b6 0%, #fbbf24 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.testimonial-item p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
    font-style: italic;
    font-size: 0.9375rem;
    line-height: 1.6;
}

.testimonial-item .author {
    font-weight: 600;
    color: #fbbf24;
    margin-bottom: 5px;
    font-size: 1rem;
}

.testimonial-item .title {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* 底部下载引导 */
.footer-cta {
    padding: 100px 0;
    background: #0f0f1a;
    text-align: center;
    position: relative;
}

.footer-cta h2 {
    font-size: 2.75rem;
    margin-bottom: 15px;
    color: #fff;
    font-weight: 800;
    letter-spacing: -1px;
}

.footer-cta p {
    font-size: 1.1875rem;
    color: #a0a0a0;
    margin-bottom: 50px;
}

.footer-platforms {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-btn {
    display: inline-block;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    color: #fff;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 700;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.footer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.4);
}

/* 底部 */
footer {
    background: linear-gradient(180deg, #0f0f1a 0%, #080810 100%);
    color: #fff;
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

footer p {
    opacity: 0.6;
    font-size: 0.9375rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .features h2,
    .platforms h2,
    .testimonials h2,
    .footer-cta h2 {
        font-size: 2rem;
    }

    .features-grid,
    .platforms-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .stat-item .number {
        font-size: 2.5rem;
    }

    .footer-platforms {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}