:root {
    --primary-color: #2C3E50;
    --secondary-color: #34495E;
    --accent-color: #E74C3C;
    --text-color: #2C3E50;
    --light-bg: #ECF0F1;
    --white: #FFFFFF;
    --gradient-primary: linear-gradient(135deg, #2C3E50 0%, #3498DB 100%);
    --gradient-accent: linear-gradient(135deg, #E74C3C 0%, #F39C12 100%);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-bg);
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 2rem;
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s;
}

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

.menu-btn, .close-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right 0.3s;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        right: 0;
    }

    .menu-btn, .close-btn {
        display: block;
    }

    .close-btn {
        position: absolute;
        top: 1rem;
        right: 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }
}

/* 英雄区域样式 */
.hero {
    min-height: 100vh;
    background: var(--gradient-primary);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect width="100" height="100" fill="none"/><path d="M0,0 L100,100 M100,0 L0,100" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></svg>');
    opacity: 0.1;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 8rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(45deg, var(--white), rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.5rem;
    opacity: 0.9;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
}

.cta-button {
    padding: 1rem 2rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
}

.cta-button.primary {
    background: var(--white);
    color: var(--primary-color);
}

.cta-button.secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    background: linear-gradient(45deg, var(--white), rgba(255,255,255,0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.8;
}

.hero-image {
    position: relative;
}

.image-container {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-container img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s;
}

.image-container:hover img {
    transform: scale(1.05);
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 2rem;
    color: var(--white);
}

.overlay-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.overlay-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.overlay-content p {
    font-size: 1rem;
    opacity: 0.9;
}

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 6rem 2rem;
    }

    .hero-text {
        align-items: center;
    }

    .hero p {
        margin: 0 auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        max-width: 600px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}

/* 特色区域样式 */
.features {
    padding: 6rem 2rem;
    background: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--secondary-color);
}

/* 画廊样式 */
.gallery {
    padding: 6rem 2rem;
    background: var(--light-bg);
}

.gallery h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--primary-color);
}

.gallery-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.gallery-main {
    position: relative;
}

.gallery-side {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

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

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 2rem;
    color: var(--white);
    transform: translateY(100%);
    transition: transform 0.3s;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.gallery-overlay p {
    font-size: 1rem;
    opacity: 0.9;
}

.main-item {
    height: 600px;
}

.side-item {
    height: 290px;
}

@media (max-width: 768px) {
    .gallery-container {
        grid-template-columns: 1fr;
    }

    .main-item {
        height: 400px;
    }

    .side-item {
        height: 200px;
    }

    .gallery-overlay {
        transform: translateY(0);
        background: rgba(0,0,0,0.6);
    }
}

/* 下载区域样式 */
.download {
    padding: 6rem 2rem;
    background: var(--white);
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--primary-color);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.download-btn {
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    box-shadow: var(--shadow-md);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: var(--gradient-primary);
}

/* 页脚样式 */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 4rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--white);
    font-size: 1.5rem;
    transition: all 0.3s;
}

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

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        gap: 2rem;
        transition: right 0.3s;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        right: 0;
    }

    .menu-btn, .close-btn {
        display: block;
        font-size: 1.5rem;
        cursor: pointer;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 6rem 1rem 4rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-image {
        margin-top: 2rem;
    }

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

    .download-buttons {
        flex-direction: column;
    }

    .auth-buttons {
        flex-direction: column;
        width: 90%;
    }

    .auth-btn {
        width: 100%;
        justify-content: center;
    }
}

/* 认证按钮样式 */
.auth-buttons {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1.5rem;
    z-index: 1000;
}

.auth-btn {
    padding: 1rem 3rem;
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    color: var(--primary-color);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
    box-shadow: var(--shadow-md);
}

.auth-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.login-btn {
    background: var(--primary-color);
    color: var(--white);
}

.register-btn {
    background: var(--white);
    color: var(--primary-color);
}

.auth-btn i {
    font-size: 1.1rem;
}