/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    /* 天蓝色渐变背景 */
    background: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
    color: #ffffff;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Canvas Background for particles */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.content-wrapper {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 4rem;
}

header h1 {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: #fff;
    text-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.slogan {
    font-size: 1.2rem;
    color: #e0f2fe;
    font-weight: 500;
}

/* Pricing Section */
.pricing-container {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.pricing-card {
    background-color: #23253b; /* 保持暗色卡片，与图片一致并形成强对比 */
    border-radius: 12px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 350px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
}

.pricing-card.recommended {
    border: 1px solid rgba(175, 96, 240, 0.4);
    transform: translateY(-5px);
}

/* Ribbon */
.ribbon {
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    overflow: hidden;
    z-index: 1;
}

.ribbon span {
    position: absolute;
    display: block;
    width: 225px;
    padding: 10px 0;
    background: linear-gradient(45deg, #a453f0, #e94cf1);
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    text-align: center;
    left: -10px;
    top: 30px;
    transform: rotate(45deg);
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #e1e3f0;
}

.price {
    margin-bottom: 2rem;
    display: flex;
    align-items: flex-end;
}

.currency {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 5px;
    margin-right: 2px;
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
}

.period {
    font-size: 1rem;
    color: #a0a4c2;
    margin-bottom: 5px;
    margin-left: 2px;
}

.card-features {
    flex-grow: 1;
    margin-bottom: 2rem;
}

.card-features ul {
    list-style: none;
}

.card-features li {
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: #d1d4ea;
    display: flex;
    align-items: center;
}

.card-features li .check {
    color: #1fcbe1;
    font-weight: bold;
    margin-right: 10px;
}

.btn {
    display: block;
    width: 100%;
    padding: 1rem;
    text-align: center;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(90deg, #794ff2, #1fcbe1);
    color: #fff;
    box-shadow: 0 4px 15px rgba(121, 79, 242, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(121, 79, 242, 0.6);
}

.btn-secondary {
    background-color: #333652;
    color: #d1d4ea;
}

.btn-secondary:hover {
    background-color: #43476d;
    color: #fff;
}

/* Common Section Titles */
.reviews-section h2, .faq-section h2, .seo-articles h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #ffffff;
    text-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* Reviews Section */
.reviews-section {
    margin-bottom: 4rem;
}

.reviews-container {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.review-card {
    background: rgba(255,255,255,0.15);
    border-radius: 8px;
    padding: 1.5rem;
    width: 100%;
    max-width: 350px;
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(15px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.stars {
    color: #ffde59;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.review-text {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    font-style: italic;
}

.reviewer {
    font-size: 0.85rem;
    color: #e0f2fe;
    text-align: right;
    font-weight: 500;
}

/* FAQ Section */
.faq-section {
    margin-bottom: 4rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(15px);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: rgba(255,255,255,0.25);
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.faq-item p {
    font-size: 0.95rem;
    color: #e0f2fe;
    line-height: 1.6;
}

/* SEO Articles Section */
.seo-articles {
    margin-bottom: 4rem;
    background: rgba(0,0,0,0.1);
    padding: 2rem;
    border-radius: 12px;
    backdrop-filter: blur(5px);
}

.article-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.article-links a {
    color: #ffffff;
    text-decoration: none;
    padding: 0.8rem;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    transition: all 0.3s ease;
    font-size: 0.9rem;
    display: block;
    border: 1px solid transparent;
}

.article-links a:hover {
    background: rgba(255,255,255,0.2);
    border-color: rgba(255,255,255,0.3);
    transform: translateX(5px);
}

/* Footer */
footer {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: #e0f2fe;
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    
    .pricing-card, .review-card {
        max-width: 100%;
    }
}