:root {
    --primary-color: #10b981; /* Emerald Green */
    --primary-dark: #047857;
    --primary-light: #d1fae5;
    --text-main: #1f2937;
    --text-muted: #4b5563;
    --bg-main: #f9fafb;
    --bg-light: #ffffff;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(16, 185, 129, 0.1);
    --transition: all 0.25s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto', sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section {
    padding: 80px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 900;
    margin-bottom: 15px;
    color: var(--text-main);
}

.section-subtitle {
    color: var(--text-muted);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 25px;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-main);
    transition: var(--transition);
}

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

/* 按钮 */
.btn-primary {
    background: var(--primary-color);
    color: white;
    padding: 12px 28px;
    border-radius: 4px;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
    display: inline-block;
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(16, 185, 129, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--text-main);
    padding: 10px 26px;
    border-radius: 4px;
    font-weight: 700;
    transition: var(--transition);
    border: 2px solid var(--border-color);
    cursor: pointer;
    text-align: center;
    display: inline-block;
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.block-btn {
    display: block;
    width: 100%;
    padding: 15px 0;
}

/* Hero Section */
.hero {
    padding: 160px 0 100px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-image {
    flex: 1;
    position: relative;
    height: 400px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.abstract-shape {
    position: relative;
    width: 100%;
    height: 100%;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: var(--primary-color);
    opacity: 0.1;
    animation: pulse 4s infinite alternate;
}

.c1 { width: 300px; height: 300px; top: 10%; right: 10%; }
.c2 { width: 200px; height: 200px; bottom: 0; left: 10%; animation-delay: 2s; }

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 20px;
    color: var(--text-main);
    line-height: 1.2;
}

.hero-title span {
    color: var(--primary-color);
    display: block;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

/* Grid System */
.grid {
    display: grid;
    gap: 25px;
}

.list-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
    background: var(--card-bg);
    border-radius: 6px;
    padding: 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

/* 优势 */
.card-icon {
    font-size: 2rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* 节点状态 */
.status-panel {
    background: var(--card-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.status-header {
    display: flex;
    justify-content: space-between;
    padding: 15px 25px;
    background: var(--bg-main);
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
}

.status-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 25px;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

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

.status-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 8px;
}

.status-online { background-color: var(--primary-color); }
.status-busy { background-color: #f59e0b; }

.ping-good { color: var(--primary-color); font-weight: 700;}
.ping-ok { color: #f59e0b; font-weight: 700;}

/* 套餐价格 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.pricing-card {
    background: var(--card-bg);
    border-radius: 6px;
    padding: 40px;
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-md);
}

.popular-tag {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
}

.plan-name {
    font-size: 1.2rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.plan-price {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-main);
    margin-bottom: 25px;
}

.plan-price span {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-muted);
}

.plan-features {
    list-style: none;
    margin-bottom: 30px;
    flex-grow: 1;
}

.plan-features li {
    margin-bottom: 12px;
    color: var(--text-main);
    display: flex;
    align-items: flex-start;
}

.plan-features li span {
    color: var(--primary-color);
    margin-right: 8px;
}

/* 常见问题 */
.faq-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 20px;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.faq-question {
    padding: 15px 20px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    color: var(--text-muted);
}

.faq-item.active .faq-answer {
    padding: 0 20px 15px;
    max-height: 300px;
}

/* 知识库 */
.article-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.article-card h4 {
    color: var(--text-main);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.article-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: #111827;
    color: #9ca3af;
    text-align: center;
    padding: 40px 0;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-container { flex-direction: column; text-align: center; }
    .hero-buttons { justify-content: center; }
    .hero-image { display: none; }
    .nav-links { display: none; }
}