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

:root {
    --primary-color: #1890ff;
    --secondary-color: #52c41a;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #fff;
    --bg-light: #f5f5f5;
    --border-color: #e8e8e8;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    background: #fff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    background: linear-gradient(135deg, #1890ff, #52c41a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.nav-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-login,
.btn-register {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-login {
    background: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

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

.btn-register:hover {
    background: #40a9ff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    border-radius: 3px;
    transition: all 0.3s;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto 60px;
}

.hero-title {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 20px;
    animation: fadeInUp 0.8s;
}

.hero-subtitle {
    font-size: 24px;
    margin-bottom: 20px;
    opacity: 0.9;
    animation: fadeInUp 0.8s 0.2s both;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.8;
    line-height: 1.8;
    animation: fadeInUp 0.8s 0.4s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 0.8s 0.6s both;
}

.btn-primary,
.btn-secondary {
    padding: 15px 40px;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: #fff;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 80px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-number span {
    font-size: 24px;
    margin-left: 5px;
}

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

/* 平台支持 */
.platforms {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 50px;
    color: var(--text-color);
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 30px;
}

.platform-item {
    background: #fff;
    padding: 30px 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    cursor: pointer;
}

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

.platform-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.platform-item span {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
}

/* 功能模块 */
.features {
    padding: 80px 0;
    background: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #1890ff, #52c41a);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.feature-icon i {
    font-size: 32px;
    color: #fff;
}

.feature-title {
    font-size: 22px;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--text-color);
}

.feature-description {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 15px;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.3s;
}

.feature-link:hover {
    gap: 12px;
}

/* 订购方案 */
.pricing {
    padding: 80px 0;
    background: var(--bg-light);
}

.pricing-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid var(--border-color);
    background: #fff;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
}

.tab-btn.active,
.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(24, 144, 255, 0.05);
}

.pricing-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    background: #fff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: var(--shadow);
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.pricing-card.featured {
    border: 2px solid var(--primary-color);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--primary-color);
    color: #fff;
    padding: 5px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.price {
    margin-bottom: 15px;
}

.price-amount {
    font-size: 48px;
    font-weight: bold;
    color: var(--primary-color);
}

.price-unit {
    font-size: 18px;
    color: var(--text-light);
    margin-left: 5px;
}

.price-desc {
    color: var(--text-light);
    font-size: 14px;
}

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

.pricing-features li {
    padding: 12px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-color);
}

.pricing-features i {
    color: var(--secondary-color);
    font-size: 18px;
}

.btn-pricing {
    width: 100%;
    padding: 15px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-pricing:hover {
    background: #40a9ff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* 页脚 */
.footer {
    background: #1a1a1a;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    font-size: 24px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #1890ff, #52c41a);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    color: #999;
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
}

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

.footer-heading {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #999;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-contact {
    list-style: none;
}

.footer-contact li {
    margin-bottom: 15px;
    color: #999;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact i {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #999;
}

.footer-bottom a {
    color: #999;
    text-decoration: none;
    margin: 0 10px;
}

.footer-bottom a:hover {
    color: var(--primary-color);
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s;
}

.modal-content {
    background: #fff;
    margin: 5% auto;
    padding: 40px;
    border-radius: 12px;
    max-width: 450px;
    position: relative;
    animation: slideDown 0.3s;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--text-color);
}

.modal-content h2 {
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-color);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

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

.form-group .btn-code {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    padding: 6px 15px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.form-checkbox input {
    margin-top: 4px;
}

.form-checkbox label {
    font-size: 14px;
    color: var(--text-light);
}

.form-checkbox a {
    color: var(--primary-color);
    text-decoration: none;
}

.form-footer {
    text-align: center;
    display: flex;
    justify-content: space-between;
    font-size: 14px;
}

.form-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* 动画 */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-actions {
        display: none;
    }

    .hero-title {
        font-size: 36px;
    }

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

    .hero-description {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        gap: 40px;
    }

    .section-title {
        font-size: 28px;
    }

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

    .pricing-content {
        grid-template-columns: 1fr;
    }

    .platform-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 28px;
    }

    .platform-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: 10% auto;
        padding: 30px 20px;
    }
}