/* 全局变量 */
:root {
    --color-primary: #1a237e;
    --color-secondary: #0d47a1;
    --color-accent: #2196f3;
    --color-white: #ffffff;
    --color-gray: #f5f5f5;
    --color-dark: #333333;
    --color-light: #e3f2fd;
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    --gradient-accent: linear-gradient(135deg, var(--color-accent), #1976d2);
    --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);
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--color-dark);
    overflow-x: hidden;
}

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

/* 顶部信息栏 */
.top-bar {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px 0;
    font-size: 14px;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    gap: 20px;
}

.contact-info {
    display: flex;
    gap: 15px;
}

.contact-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.server-status {
    display: flex;
    align-items: center;
    gap: 5px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4caf50;
    border-radius: 50%;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-selector {
    display: flex;
    gap: 10px;
}

.language-selector span {
    cursor: pointer;
    transition: var(--transition);
}

.language-selector span:hover {
    color: var(--color-accent);
}

.user-actions {
    display: flex;
    gap: 15px;
}

.btn-download {
    background: var(--color-accent);
    color: var(--color-white);
    padding: 5px 15px;
    border-radius: 4px;
    text-decoration: none;
    transition: var(--transition);
}

.btn-download:hover {
    background: #1976d2;
}

.btn-login {
    color: var(--color-white);
    cursor: pointer;
    transition: var(--transition);
}

.btn-login:hover {
    color: var(--color-accent);
}

/* 头部导航 */
.header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 24px;
    color: var(--color-primary);
    margin: 0;
    text-transform: none;
}

.logo-tag {
    background: var(--color-accent);
    color: var(--color-white);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.nav-menu {
    display: flex;
    gap: 30px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: var(--color-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--color-dark);
    padding: 5px;
}

/* 位置导航 */
.position {
    background: var(--color-gray);
    padding: 10px 0;
    font-size: 14px;
    text-align: left;
}

.position a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.position a:hover {
    color: var(--color-secondary);
}

/* 英雄区域 */
.hero {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero::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 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    justify-items: center;
}

.hero-text {
    max-width: 600px;
    text-align: center;
}

.hero-text h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
    font-weight: 700;
    text-align: center;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 30px;
    opacity: 0.9;
    font-weight: 500;
    text-align: center;
}

.hero-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 40px;
    justify-items: center;
}

.hero-features span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 18px;
    background: rgba(255,255,255,0.1);
    padding: 12px 20px;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    width: 100%;
    max-width: 250px;
}

.hero-features span:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.hero-features i {
    font-size: 20px;
    color: var(--color-accent);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.cta-button {
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

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

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

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 42px;
    font-weight: bold;
    display: block;
    margin-bottom: 10px;
    color: var(--color-accent);
}

.stat-label {
    font-size: 16px;
    opacity: 0.9;
    font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-text {
        max-width: 100%;
    }

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

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

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

    .nav-menu {
        display: none;
    }

    .menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
        min-height: auto;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

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

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

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stat-item {
        padding: 20px;
    }

    .stat-number {
        font-size: 36px;
    }

    .top-bar .container {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }

    .top-bar-left, .top-bar-right {
        flex-direction: column;
        gap: 10px;
    }
}

/* 产品特点 */
.features {
    padding: 100px 0;
    background: var(--color-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-gray);
}

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

.feature-card {
    background: var(--color-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature-icon i {
    font-size: 32px;
    color: var(--color-white);
}

.feature-card h3 {
    color: var(--color-primary);
    margin-bottom: 15px;
    font-size: 20px;
}

.feature-card p {
    color: var(--color-gray);
    line-height: 1.6;
}

/* 下载区域 */
.download {
    padding: 100px 0;
}

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

.download-card {
    background: var(--color-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.download-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.download-icon i {
    font-size: 32px;
    color: var(--color-white);
}

.download-features {
    list-style: none;
    margin: 20px 0;
}

.download-features li {
    margin: 10px 0;
    color: var(--color-gray);
}

.download-btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 25px;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
}

/* 价格套餐 */
.pricing {
    padding: 100px 0;
    background: var(--color-light);
}

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

.price-card {
    background: var(--color-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.price-card.featured {
    transform: scale(1.05);
    border: 2px solid var(--color-primary);
}

.popular-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
}

.price-header {
    margin-bottom: 30px;
}

.price {
    font-size: 48px;
    color: var(--color-primary);
    margin: 20px 0;
}

.price span {
    font-size: 16px;
    color: var(--color-gray);
}

.price-save {
    color: var(--color-success);
    font-weight: 500;
    margin-top: 10px;
}

.features-list {
    list-style: none;
    margin: 30px 0;
}

.features-list li {
    margin: 15px 0;
    color: var(--color-gray);
    display: flex;
    align-items: center;
    gap: 10px;
}

.features-list li i {
    color: var(--color-success);
}

.price-btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--color-primary);
    color: var(--color-white);
    text-decoration: none;
    border-radius: 25px;
    transition: var(--transition);
}

.price-btn:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
}

/* 关于我们 */
.about {
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text p {
    margin-bottom: 30px;
    color: var(--color-gray);
    font-size: 18px;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.about-feature {
    text-align: center;
}

.about-feature i {
    font-size: 32px;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.about-feature h4 {
    margin-bottom: 10px;
    color: var(--color-primary);
}

.about-feature p {
    color: var(--color-gray);
    font-size: 16px;
}

.about-image {
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.image-placeholder::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 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,160C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.1;
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background: var(--color-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.contact-item {
    text-align: center;
    padding: 30px;
    background: var(--color-white);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.contact-item i {
    font-size: 32px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.contact-item h3 {
    margin-bottom: 15px;
    color: var(--color-primary);
}

.contact-item p {
    color: var(--color-gray);
    margin: 5px 0;
}

.contact-form {
    background: var(--color-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 16px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.submit-btn {
    width: 100%;
    padding: 12px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
}

.submit-btn:hover {
    background: var(--color-secondary);
}

/* 页脚 */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 80px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-section p {
    margin-bottom: 20px;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    text-decoration: none;
    transition: var(--transition);
}

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

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    opacity: 1;
    color: var(--color-accent);
}

.qr-code {
    text-align: center;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--color-white);
    margin: 0 auto 10px;
    border-radius: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 10px;
}

.footer-links a {
    color: var(--color-white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent);
}

/* 友情链接 */
.friend-links {
    background: var(--color-light);
    padding: 40px 0;
}

.friend-links h4 {
    text-align: center;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.friend-links ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    list-style: none;
}

.friend-links a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    padding: 5px 10px;
}

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

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

.feature-card,
.download-card,
.price-card,
.contact-item {
    animation: fadeIn 0.6s ease-out forwards;
}

/* 滚动动画 */
.scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}