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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    background: var(--bg-primary);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    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;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* 主内容区域 */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

.page {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    animation: fadeIn 0.5s;
}

.page.active {
    display: block;
}

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

/* 首页样式 */
.hero-section {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border-radius: 20px;
    margin-bottom: 3rem;
    color: white;
}

.bot-avatar {
    margin-bottom: 2rem;
}

.avatar-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 5px solid white;
    box-shadow: var(--shadow-lg);
    object-fit: cover;
}

.bot-name {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.bot-description {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* 页面标题 */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* 功能说明页面 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    text-align: center;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-image {
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.feature-img {
    max-width: 120px;
    max-height: 120px;
    width: auto;
    height: auto;
    object-fit: contain;
}

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

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.feature-commands {
    text-align: left;
    color: var(--text-secondary);
    line-height: 2;
}

.feature-commands p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
}

.feature-commands strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 更新日志页面 */
.changelog-container {
    max-width: 800px;
    margin: 0 auto;
}

.changelog-item {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    position: relative;
    padding-left: 4rem;
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: 1.5rem;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-color);
}

.changelog-date {
    position: absolute;
    left: -3rem;
    top: 2rem;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.changelog-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.changelog-content ul {
    list-style: none;
    padding-left: 0;
}

.changelog-content li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
}

.changelog-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.8rem;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

/* 邀请指南页面 */
.invite-content {
    max-width: 600px;
    margin: 0 auto;
}

.invite-intro {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.invite-qrcode {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
}

.qrcode-img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* 赞助页面 */
.sponsor-content {
    max-width: 1000px;
    margin: 0 auto;
}

.sponsor-intro {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.sponsor-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.sponsor-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: all 0.3s;
}

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

.sponsor-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

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

.sponsor-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.qr-placeholder {
    margin: 1rem 0;
}

.qr-code {
    width: 150px;
    height: 150px;
    margin: 0 auto;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.sponsor-qrcode {
    width: 200px;
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    object-fit: contain;
}

.contact-link {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: background 0.3s;
}

.contact-link:hover {
    background: var(--primary-dark);
}

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

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    margin: auto;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: slideDown 0.3s;
}

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

.modal-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.modal-header h2 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
}

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

.modal-body {
    padding: 2rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
}

/* 免责声明内容 */
.disclaimer-content {
    max-width: 100%;
}

.disclaimer-intro {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    border-radius: 8px;
}

.disclaimer-intro p {
    color: #92400e;
    line-height: 1.8;
    margin: 0;
    font-weight: 500;
}

.disclaimer-section {
    padding: 1.5rem 0;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.disclaimer-section:last-of-type {
    border-bottom: none;
}

.disclaimer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.disclaimer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.disclaimer-section ul {
    margin-left: 2rem;
    margin-top: 1rem;
    color: var(--text-secondary);
}

.disclaimer-section li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.contact-info {
    margin-top: 1rem;
    font-size: 1.1rem;
}

.contact-info a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.contact-info a:hover {
    text-decoration: underline;
}

.disclaimer-note {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 1.5rem;
    border-radius: 8px;
    margin-top: 2rem;
}

.disclaimer-note p {
    color: #92400e;
    margin: 0;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: var(--bg-primary);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

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

.footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

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

    .hamburger {
        display: flex;
    }

    .bot-name {
        font-size: 2rem;
    }

    .bot-description {
        font-size: 1rem;
    }

    .changelog-item {
        padding-left: 2rem;
    }

    .changelog-date {
        position: static;
        display: inline-block;
        margin-bottom: 1rem;
    }

    .changelog-item::before {
        display: none;
    }

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

    .sponsor-methods {
        grid-template-columns: 1fr;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1rem;
    }

    .page {
        padding: 0 1rem;
    }

    .hero-section {
        padding: 2rem 1rem;
    }

    .bot-name {
        font-size: 1.5rem;
    }
}