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

:root {
    --primary-color: #1a237e;
    --secondary-color: #3949ab;
    --accent-color: #5c6bc0;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --border-color: #e0e0e0;
    --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;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 0 20px;
    flex: 1;
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 40px 0;
}

.hero {
    text-align: center;
    padding: 60px 20px;
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
}

.hero h2 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.feature-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

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

/* Content Sections */
.content-section {
    margin-bottom: 50px;
}

.content-section h2 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
}

.lounge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.lounge-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.lounge-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.lounge-image {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 15px;
}

.lounge-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.lounge-card p {
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.7;
}

.lounge-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    background: var(--accent-color);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

/* Guide Content */
.guide-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.guide-item {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.guide-item h3 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.guide-item ul {
    list-style: none;
    padding-left: 0;
}

.guide-item li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-light);
    line-height: 1.8;
}

.guide-item li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: bold;
}

/* Share Section */
.share-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 50px 20px;
    border-radius: 12px;
    text-align: center;
    margin-bottom: 40px;
}

.share-section h2 {
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.share-section p {
    margin-bottom: 25px;
    opacity: 0.95;
    font-size: 1.1rem;
}

.share-btn {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 30px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.share-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 30px 20px;
    text-align: center;
    margin-top: auto;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer p {
    margin: 8px 0;
}

.beian {
    margin-top: 15px;
    font-size: 1rem;
}

.beian a {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    display: inline-block;
}

.beian a:hover {
    color: white;
    text-decoration: underline;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.close {
    color: var(--text-light);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 20px;
}

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

.modal-content h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
    clear: both;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

.submit-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border: none;
    padding: 15px;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }

    .hero h2 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

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

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

    .modal-content {
        width: 95%;
        margin: 10% auto;
        padding: 20px;
    }
}

/* PWA Fullscreen Support */
@media (display-mode: standalone) {
    body {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
    }
}