/* --- 全局和基础设置 --- */
:root {
    --bg-color: #1a1a1d;
    --card-color: #26262a;
    --primary-accent: #4aedc4; /* 科技感青色 */
    --cta-color: #c3073f;      /* 醒目红色 */
    --cta-hover-color: #a00532;
    --text-primary: #f5f5f5;
    --text-secondary: #a9a9a9;
    --border-color: #3e3e42;
    --font-heading: 'Exo 2', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* --- 主容器和卡片布局 --- */
.container {
    width: 100%;
    max-width: 500px;
}

.order-card {
    background: var(--card-color);
    border-radius: 15px;
    border: 1px solid var(--border-color);
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(var(--primary-accent), 0.1);
    transition: all 0.3s ease;
}

/* --- 卡片头部 --- */
.card-header {
    text-align: center;
    margin-bottom: 30px;
}

.card-header .logo {
    font-family: var(--font-heading);
    font-size: 40px;
    color: var(--primary-accent);
    line-height: 1;
    margin-bottom: 10px;
    text-shadow: 0 0 10px var(--primary-accent);
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 28px;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.card-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* --- 会员计划选项 --- */
.plan-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 30px;
}

@media (min-width: 500px) {
    .plan-options {
        grid-template-columns: repeat(3, 1fr);
    }
}

.plan {
    position: relative;
    padding: 20px 15px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.plan:hover {
    transform: translateY(-5px);
    border-color: var(--primary-accent);
}

.plan.selected {
    border-color: var(--primary-accent);
    background-color: rgba(74, 237, 196, 0.05);
    box-shadow: 0 0 15px rgba(74, 237, 196, 0.2);
}

.plan h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    margin-bottom: 5px;
}

.plan p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.plan-price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-accent);
}

.plan-price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-secondary);
}

.plan.recommended .badge {
    position: absolute;
    top: -12px;
    right: 10px;
    background: var(--primary-accent);
    color: var(--bg-color);
    padding: 3px 8px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}


/* --- 订单摘要 --- */
.order-summary {
    background-color: rgba(0,0,0,0.2);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 30px;
}

.summary-line, .price-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    color: var(--text-secondary);
}

.summary-line {
    margin-bottom: 10px;
}

#selected-plan-name, #total-price {
    color: var(--text-primary);
    font-weight: 500;
}

#total-price {
    font-family: var(--font-heading);
    font-size: 24px;
    color: var(--primary-accent);
}


/* --- 底部和行动按钮 --- */
.cta-button {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background-color: var(--cta-color);
    color: white;
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    background-color: var(--cta-hover-color);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(195, 7, 63, 0.4);
}

.cta-button:active {
    transform: translateY(-1px);
}

.credits {
    text-align: center;
    margin-top: 20px;
    font-size: 12px;
    color: #444;
}