@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #ff3b30;
    --primary-hover: #ff2d55;
    --bg-dark: #111111;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #a1a1aa;
    --accent: #ff453a;
    --success: #32d74b;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 动态背景画布 */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    /* 红色渐变背景 */
    background: linear-gradient(135deg, #1a0505 0%, #3a0000 50%, #110000 100%);
}

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

/* Header */
header {
    padding: 20px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(17, 17, 17, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: 1px;
}

nav a {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--primary-color);
}

/* 玻璃卡片公共样式 */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 30px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(255, 59, 48, 0.2);
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
    color: white;
    box-shadow: 0 4px 15px rgba(255, 59, 48, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(255, 59, 48, 0.6);
    transform: scale(1.05);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    text-align: center;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, #ffc0c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.pricing-card {
    display: flex;
    flex-direction: column;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    text-align: center;
}

.pricing-card .desc {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.pricing-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.pricing-card .price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 40px;
    flex-grow: 1;
}

.pricing-card ul li {
    margin-bottom: 15px;
    color: var(--text-main);
    display: flex;
    align-items: center;
}

.pricing-card ul li::before {
    content: '✓';
    color: var(--success);
    margin-right: 10px;
    font-weight: bold;
}

.pricing-card.standard {
    border: 2px solid var(--success); /* Highlights standard plan as requested by original screenshot context */
    position: relative;
}

.pricing-card.standard::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--success);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

/* Reviews Section */
.reviews {
    padding: 80px 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.review-card .user {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.review-card .avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    margin-right: 15px;
}

.review-card .stars {
    color: #ffc107;
    margin-bottom: 10px;
}

/* FAQ Section */
.faq {
    padding: 80px 0;
}

.faq-item {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 20px;
}

.faq-item h4 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.faq-item p {
    color: var(--text-muted);
}

/* SEO Links Section */
.seo-links {
    padding: 50px 0;
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid var(--card-border);
}

.seo-links h4 {
    margin-bottom: 20px;
    text-align: center;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.links-grid a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.links-grid a:hover {
    color: var(--primary-color);
}

/* Footer */
footer {
    padding: 30px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid var(--card-border);
}

/* Article Page Specifics */
.article-page {
    background: var(--bg-dark);
}

.article-container {
    padding-top: 100px;
    padding-bottom: 50px;
}

.article-meta {
    display: flex;
    gap: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 15px;
}

.article-body p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.internal-links {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px dashed var(--card-border);
}

.internal-links h3 {
    margin-bottom: 15px;
}

.internal-links ul {
    list-style-type: none;
}

.internal-links li {
    margin-bottom: 10px;
}

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

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

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
}