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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background-color: #ffffff;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #f8f9fa;
    padding: 20px 0;
    border-bottom: 1px solid #e9ecef;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #1a1a1a;
}

.tagline {
    font-size: 14px;
    color: #6c757d;
}

main {
    padding: 40px 0;
}

.main-content {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.input-section,
.output-section {
    margin-bottom: 30px;
}

h2 {
    margin-bottom: 20px;
    color: #1a1a1a;
}

textarea {
    width: 100%;
    height: 200px;
    padding: 15px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 14px;
    resize: vertical;
}

.button-group {
    margin: 20px 0;
}

button {
    background-color: #0070ba;
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    margin-right: 10px;
}

button:hover {
    background-color: #005ea6;
}

.pricing-section {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin: 40px 0;
}

.price-card {
    text-align: center;
    padding: 20px;
    border: 2px solid #0070ba;
    border-radius: 8px;
    margin-top: 20px;
}

.price {
    font-size: 36px;
    font-weight: bold;
    color: #0070ba;
    margin: 10px 0;
}

.price-card p {
    font-weight: bold;
    margin: 15px 0;
}

.history-section {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin: 40px 0;
}

.history-list {
    list-style: none;
    border: 1px solid #ced4da;
    border-radius: 4px;
}

.history-item {
    padding: 15px;
    border-bottom: 1px solid #ced4da;
}

.history-item:last-child {
    border-bottom: none;
}

footer {
    background-color: #f8f9fa;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #e9ecef;
}

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

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-links a {
    color: #1a1a1a;
    text-decoration: none;
}

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

/* 状态条样式 */
.premium-status {
    background-color: #4caf50;
    color: white;
    padding: 10px 0;
    margin-bottom: 20px;
    border-radius: 4px;
}

.status-content {
    text-align: center;
    font-weight: bold;
}

/* 激活码输入区域样式 */
.activation-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.activation-section h4 {
    margin-bottom: 10px;
    font-size: 14px;
    color: #6c757d;
}

.activation-section input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    margin-bottom: 10px;
    font-size: 14px;
}

.activation-section button {
    margin-top: 10px;
}

/* 使用指南样式 */
.guide-section {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin: 40px 0;
}

.guide-content h3 {
    margin-bottom: 20px;
    color: #1a1a1a;
}

.guide-content h4 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: #1a1a1a;
}

.guide-content p {
    margin-bottom: 15px;
    line-height: 1.6;
}

/* 站点列表样式 */
.sites-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e9ecef;
}

.sites-list {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.site-item {
    font-size: 12px;
    color: #6c757d;
}

.site-item a {
    color: #6c757d;
    text-decoration: none;
}

.site-item a:hover {
    text-decoration: underline;
}