/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 */
    --primary-color: #1477f8;
    --primary-light: #0350cc;
    --primary-dark: #1d4ed8;
    --accent-color: #0658d4;
    
    /* 文本颜色 */
    --text-color: #1f2937;
    --text-secondary: #4b5563;
    
    /* 背景颜色 */
    --background-color: #f8fafc;
    --background-light: #ffffff;
    --card-background: rgba(255, 255, 255, 0.98);
    --card-border: rgba(0, 0, 0, 0.08);
    
    /* 阴影效果 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.12);
    
    /* 过渡效果 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    scroll-behavior: smooth;
}
/* 容器样式 */
.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 45px 0;
    position: relative;
    z-index: 10;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-color);
    transition: all var(--transition-normal);
    letter-spacing: -0.5px;
}

.logo:hover {
    transform: scale(1.03);
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-links li {
    margin-left: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    position: relative;
    padding: 10px 0;
    letter-spacing: 0.3px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width var(--transition-normal);
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--primary-color);
}

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

/* 头部英雄区域样式 */
.header {
    background: linear-gradient(180deg, var(--background-color) 0%, var(--background-light) 100%);
    padding: 50px 0 100px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 60%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
    z-index: 0;
    pointer-events: none;
}

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

.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.hero-content {
    flex: 1;
    max-width: 500px;
    animation: fadeInLeft 1s ease-out;
    text-align: center;
}

.hero-content h1 {
    text-align: center;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
    font-weight: bold;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-secondary);
    animation: fadeInUp 1s ease-out 0.3s both;
}

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

.hero-buttons {
    display: flex;
    gap: 20px;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.btn {
    padding: 14px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    display: inline-block;
    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: left 0.6s ease;
}

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

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-color);
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.4);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.5);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--accent-color);
    box-shadow: 0 4px 12px rgba(33, 150, 243, 0.3);
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(33, 150, 243, 0.4);
}

.hero-phone {
    flex: 1;
    display: flex;
    justify-content: flex-end;
    animation: fadeInRight 1s ease-out 0.9s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}
.hero-phone img {
    width: 280px;
    border-radius: 25px;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border: 8px solid white;
}
/* 核心功能区域样式 */
.features {
    padding: 40px 0 80px;
    background: linear-gradient(180deg, var(--background-light) 0%, var(--background-color) 100%);
    position: relative;
}
.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%232563eb" fill-opacity="0.03"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
    opacity: 0.6;
}
.features h2 {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 50px;
    color: var(--text-color);
    position: relative;
    z-index: 1;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.features h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 18px auto 0;
    border-radius: 4px;
    position: relative;
    z-index: 1;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 28px;
    position: relative;
    z-index: 1;
}

@media (min-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-item {
    background-color: var(--card-background);
    padding: 38px 26px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--card-border);
    cursor: pointer;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 76px;
    height: 76px;
    margin: 0 auto 22px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all var(--transition-normal);
    box-shadow: 0 8px 18px rgba(37, 99, 235, 0.25);
}

.feature-item:hover .feature-icon {
    transform: scale(1.08) rotate(3deg);
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.35);
}

.feature-icon svg {
    width: 38px;
    height: 38px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.feature-item h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: 0.2px;
}

.feature-item p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* 应用截图区域样式 */
.screenshots {
    padding: 40px 0 80px;
    background: linear-gradient(180deg, var(--background-color) 0%, var(--background-light) 100%);
    position: relative;
}

.screenshots::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%232563eb" fill-opacity="0.03"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
    opacity: 0.6;
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 1;
}

@media (min-width: 1200px) {
    .screenshots-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.screenshot-item {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    background-color: transparent;
}

.screenshot-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(6, 182, 212, 0.08));
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 2;
    pointer-events: none;
}

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

.screenshot-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.screenshot-item img {
    width: 100%;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-slow);
    display: block;
}

.screenshot-item:hover img {
    transform: scale(1.03);
}

/* 下载区域样式 */
.download {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, var(--background-light) 0%, var(--background-color) 100%);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%232563eb" fill-opacity="0.03"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
    opacity: 0.6;
}

.download-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    z-index: 1;
    gap: 50px;
}

.download-info {
    flex: 1;
    max-width: 520px;
    text-align: left;
}

.download h2 {
    font-size: 2.4rem;
    margin-bottom: 14px;
    color: var(--text-color);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.download h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 18px 0 28px;
    border-radius: 4px;
}

.download-subtitle {
    font-size: 1.2rem;
    margin-bottom: 18px;
    color: var(--primary-color);
    font-weight: 600;
}

.download-description {
    font-size: 1.05rem;
    margin-bottom: 35px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.download-features {
    margin-bottom: 35px;
}

.download-feature {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(37, 99, 235, 0.08);
}

.download-feature:last-child {
    border-bottom: none;
}

.download-feature svg {
    width: 22px;
    height: 22px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.download-feature span {
    font-size: 0.98rem;
    color: var(--text-color);
    font-weight: 500;
}

.download-visual {
    flex: 1;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 45px;
}

.qr-card {
    background: var(--card-background);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: all var(--transition-normal);
    max-width: 300px;
    width: 100%;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.qr-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.qr-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.qr-card img {
    width: 180px;
    height: 180px;
    border-radius: 12px;
    margin-bottom: 18px;
    background-color: white;
    padding: 8px;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
}

.qr-info h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 600;
}

.qr-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.qr-note {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid rgba(37, 99, 235, 0.08);
}

.download-phone {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

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

.download-phone img {
    width: 180px;
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
    border: 8px solid white;
    transition: all 0.4s ease;
}

.download-phone img:hover {
    transform: scale(1.05);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.25);
}

.download-text {
    background: var(--card-background);
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    max-width: 280px;
    transition: all var(--transition-normal);
    border: 1px solid var(--card-border);
}

.download-text:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.download-text h3 {
    font-size: 1.2rem;
    margin-bottom: 14px;
    color: var(--text-color);
    font-weight: 600;
}

.download-text p {
    font-size: 0.95rem;
    margin-bottom: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.download-text p:last-child {
    margin-bottom: 0;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(180deg, var(--background-light) 0%, var(--background-color) 100%);
    color: var(--text-color);
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%232563eb" fill-opacity="0.03"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
    opacity: 0.6;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 50px;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.footer-section h3 {
    font-size: 1.35rem;
    margin-bottom: 26px;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    display: inline-block;
    letter-spacing: 0.2px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 3px;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 26px;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 45px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
    margin-bottom: 18px;
    text-indent: 2em;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    padding-left: 22px;
    display: inline-block;
    font-size: 0.95rem;
}

.footer-section ul li a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    transition: transform var(--transition-normal);
    font-size: 1rem;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(6px);
}

.footer-section ul li a:hover::before {
    transform: translateX(4px);
}

.footer-qr {
    margin-top: 20px;
}

.footer-qr img {
    width: 140px;
    height: 140px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background-color: rgb(255, 255, 255);
    padding: 8px;
    transition: all 0.4s ease;
}

.footer-qr img:hover {
    transform: scale(1.05);
    border-color: rgba(255, 255, 255, 0.4);
}

.footer-bottom {
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding: 30px 0;
    text-align: center;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
    margin-top: 20px;
}

.footer-bottom p {
    font-size: 1rem;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.3px;
}

.footer-bottom p:last-child {
    font-size: 0.9rem;
    color: var(--text-secondary);
    opacity: 0.8;
    margin-bottom: 0;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        gap: 50px;
    }
    
    .hero-content {
        max-width: 100%;
        margin-top: 0;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-phone {
        justify-content: center;
    }
    
    .download-content {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .download-info {
        max-width: 100%;
        text-align: center;
    }
    
    .download h2::after {
        margin: 20px auto 30px;
    }
    
    .download-feature {
        justify-content: center;
    }
    
    .download-visual {
        flex-direction: column;
        gap: 35px;
    }
}

@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
        gap: 25px;
    }
    
    .nav-links li {
        margin-left: 0;
    }
    
    .hero-content h1 {
        font-size: 2.4rem;
    }
    
    .hero-content p {
        font-size: 1.05rem;
    }
    
    .features h2,
    .download h2 {
        font-size: 2rem;
    }
    
    .features,
    .screenshots,
    .download {
        padding: 60px 0;
    }
    
    .features-grid,
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    
    .hero-phone img {
        width: 260px;
        border-width: 8px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 30px 0 60px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 0.98rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
    
    .hero-phone img {
        width: 220px;
        border-width: 6px;
    }
    
    .feature-item {
        padding: 30px 22px;
    }
    
    .feature-item h3 {
        font-size: 1.15rem;
    }
    
    .features-grid,
    .screenshots-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .modal-content {
        margin: 20% auto;
        padding: 28px;
    }
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.4);
    animation: fadeIn var(--transition-normal);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--card-background);
    margin: 12% auto;
    padding: 36px;
    border-radius: 20px;
    width: 90%;
    max-width: 380px;
    text-align: center;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: slideIn var(--transition-normal);
    border: 1px solid var(--card-border);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.close {
    color: #999999;
    position: absolute;
    top: 18px;
    right: 22px;
    font-size: 26px;
    font-weight: bold;
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.close:hover,
.close:focus {
    color: var(--text-color);
    text-decoration: none;
}

.modal h3 {
    font-size: 1.35rem;
    margin-bottom: 14px;
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: 0.2px;
}

.modal p {
    font-size: 0.95rem;
    margin-bottom: 26px;
    color: var(--text-secondary);
}

.modal-qr {
    margin-bottom: 18px;
}

.modal-qr img {
    width: 180px;
    height: 180px;
    border-radius: 12px;
    background-color: white;
    padding: 8px;
    box-shadow: var(--shadow-md);
}

/* 功能项点击效果 */
.feature-item {
    background-color: var(--card-background);
    padding: 45px 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--card-border);
    cursor: pointer;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-item:hover::before {
    transform: scaleX(1);
}

.feature-item:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: rgba(0, 0, 0, 0.15);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

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

/* 加载动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.features,
.screenshots,
.download {
    animation: fadeIn 1s ease-out;
}