/* 疾风云机场 - 白金色系精致设计系统 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
    /* 颜色系统 */
    --bg-primary: #fcfcfd;
    --bg-secondary: #f3f3f6;
    --bg-card: rgba(255, 255, 255, 0.75);
    
    /* 白金与香槟金 */
    --gold-light: #f9f5eb;
    --gold-primary: #d4af37;
    --gold-medium: #c5a880;
    --gold-dark: #aa7c11;
    --gold-glow: rgba(212, 175, 55, 0.15);
    --gold-gradient: linear-gradient(135deg, #f3e7c9 0%, #d4af37 50%, #aa7c11 100%);
    --platinum-gradient: linear-gradient(135deg, #ffffff 0%, #f1edf5 50%, #e5dfec 100%);
    --card-glow-gold: 0 8px 32px 0 rgba(212, 175, 55, 0.08);
    
    /* 文本色 */
    --text-primary: #121214;
    --text-secondary: #4a4a4f;
    --text-muted: #86868b;
    --border-color: rgba(212, 175, 55, 0.18);
    --border-hover: rgba(212, 175, 55, 0.4);
    
    /* 功能色 */
    --success: #2e7d32;
    --error: #c62828;
    
    /* 字体 */
    --font-heading: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

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

/* 背景装饰流体气泡 */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.35;
    animation: float 20s infinite alternate;
}

.blob-1 {
    top: -10%;
    right: 5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #f5ecd5 0%, rgba(255, 255, 255, 0) 70%);
}

.blob-2 {
    bottom: -10%;
    left: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, #e6e0f0 0%, rgba(255, 255, 255, 0) 70%);
}

@keyframes float {
    0% { transform: translateY(0) scale(1); }
    100% { transform: translateY(40px) scale(1.1); }
}

/* 容器与布局 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 72px;
    z-index: 1000;
    background: rgba(252, 252, 253, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.08);
    transition: all 0.3s ease;
}

header.scrolled {
    height: 64px;
    background: rgba(252, 252, 253, 0.9);
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--gold-gradient);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.3);
}

.logo-icon svg {
    fill: #ffffff;
    width: 18px;
    height: 18px;
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--gold-dark);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gold-gradient);
    transition: width 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 99px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    border: none;
}

.btn-primary {
    background: var(--gold-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(212, 175, 55, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.btn-secondary:hover {
    background: #ffffff;
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.08);
}

.nav-btn {
    padding: 8px 20px;
    font-size: 13px;
}

/* Hero Section */
.hero {
    padding-top: 160px;
    padding-bottom: 80px;
    text-align: center;
    position: relative;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(212, 175, 55, 0.08);
    border: 1px solid rgba(212, 175, 55, 0.15);
    border-radius: 99px;
    color: var(--gold-dark);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-tag svg {
    width: 14px;
    height: 14px;
    fill: var(--gold-primary);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 56px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
    animation: fadeInUp 1s ease;
}

.hero h1 span {
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 40px;
    animation: fadeInUp 1.2s ease;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 16px;
    animation: fadeInUp 1.4s ease;
}

/* 动效 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 优势卡片网格 */
.section-title {
    text-align: center;
    margin-bottom: 56px;
}

.section-title h2 {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 12px;
}

.section-title p {
    color: var(--text-muted);
    font-size: 15px;
}

.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px 32px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.01);
}

.card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--card-glow-gold);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(212, 175, 55, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    border: 1px solid rgba(212, 175, 55, 0.12);
}

.card-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--gold-primary);
}

.card h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

/* 价格方案 Section */
.pricing {
    padding: 80px 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(212, 175, 55, 0.03) 50%, rgba(255, 255, 255, 0) 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    align-items: stretch;
}

.price-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px 36px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.02);
    overflow: hidden;
}

.price-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--card-glow-gold);
}

.price-card.featured {
    border: 2px solid var(--gold-primary);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.9) 0%, rgba(249, 245, 235, 0.8) 100%);
    box-shadow: 0 10px 40px rgba(212, 175, 55, 0.12);
}

.price-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--gold-gradient);
    color: #ffffff;
    padding: 4px 14px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 99px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.price-header h3 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.price-amount {
    margin-bottom: 32px;
    display: flex;
    align-items: baseline;
}

.price-amount .currency {
    font-size: 28px;
    font-weight: 700;
    color: var(--gold-primary);
}

.price-amount .amount {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 800;
    color: var(--text-primary);
    margin-left: 2px;
}

.price-amount .period {
    font-size: 14px;
    color: var(--text-muted);
    margin-left: 8px;
}

.price-features {
    list-style: none;
    margin-bottom: 40px;
    flex-grow: 1;
}

.price-features li {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.price-features li svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    fill: var(--gold-primary);
}

.price-btn {
    width: 100%;
}

.price-btn.btn-outline {
    background: transparent;
    color: var(--gold-dark);
    border: 1px solid var(--gold-primary);
}

.price-btn.btn-outline:hover {
    background: rgba(212, 175, 55, 0.05);
    border-color: var(--gold-dark);
    transform: translateY(-2px);
}

/* 节点仿真 Section */
.nodes {
    padding: 80px 0;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.node-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.3s ease;
}

.node-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

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

.node-flag {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 15px;
}

.node-flag span {
    font-size: 18px;
}

.node-status {
    width: 8px;
    height: 8px;
    background-color: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--success);
}

.node-detail {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-muted);
}

.node-delay {
    font-weight: 600;
    color: var(--success);
}

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

.faq-wrapper {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-question {
    padding: 24px;
    font-weight: 600;
    font-size: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.faq-answer p {
    padding: 0 24px 24px;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
    fill: var(--gold-primary);
}

/* 文章中心 Section */
.articles-sec {
    padding: 80px 0;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

.art-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.art-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-hover);
    box-shadow: var(--card-glow-gold);
}

.art-img {
    height: 180px;
    background: linear-gradient(135deg, #f9f6f0 0%, #ece5d3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-medium);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1px;
    text-transform: uppercase;
    position: relative;
}

.art-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 80%);
}

.art-content {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.art-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
    display: flex;
    gap: 12px;
}

.art-title {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--text-primary);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.art-title:hover {
    color: var(--gold-dark);
}

.art-desc {
    font-size: 13.5px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.art-more {
    margin-top: auto;
    font-size: 13px;
    font-weight: 600;
    color: var(--gold-dark);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s ease;
}

.art-more:hover {
    gap: 8px;
}

.art-more svg {
    width: 14px;
    height: 14px;
    fill: var(--gold-primary);
}

/* 底部 */
footer {
    background: #111112;
    color: #e5e5ea;
    padding: 80px 0 40px;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 56px;
}

.footer-info h4 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-info p {
    font-size: 13.5px;
    color: #8e8e93;
    line-height: 1.7;
}

.footer-links h5 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #ffffff;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    text-decoration: none;
    color: #8e8e93;
    font-size: 13.5px;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 12px;
    color: #8e8e93;
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: #8e8e93;
    text-decoration: none;
}

.footer-bottom-links a:hover {
    color: #ffffff;
}

/* 返回顶部 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #ffffff;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 99;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    border-color: var(--gold-primary);
    transform: translateY(-3px);
    box-shadow: var(--card-glow-gold);
}

.back-to-top svg {
    width: 18px;
    height: 18px;
    fill: var(--gold-primary);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 44px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none; /* 移动端折叠或简化 */
    }
    
    .hero {
        padding-top: 120px;
        padding-bottom: 60px;
    }
    
    .hero h1 {
        font-size: 34px;
    }
    
    .hero p {
        font-size: 15px;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .pricing-grid, .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* 文章详情页专属样式 */
.article-page {
    padding-top: 120px;
    padding-bottom: 80px;
}

.article-header {
    margin-bottom: 40px;
    text-align: center;
}

.article-header-meta {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.article-header-meta a {
    color: var(--gold-dark);
    text-decoration: none;
    font-weight: 500;
}

.article-title-main {
    font-family: var(--font-heading);
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-primary);
    max-width: 900px;
    margin: 0 auto;
}

.article-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
}

.article-body {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.01);
}

.article-body h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 700;
    margin: 36px 0 16px;
    color: var(--text-primary);
    border-left: 4px solid var(--gold-primary);
    padding-left: 12px;
}

.article-body h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 600;
    margin: 24px 0 12px;
    color: var(--text-primary);
}

.article-body p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.article-body ul, .article-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.article-body li {
    font-size: 14.5px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.article-body strong {
    color: var(--text-primary);
}

.article-body blockquote {
    border-left: 4px solid var(--gold-medium);
    background: var(--gold-light);
    padding: 16px 24px;
    margin: 24px 0;
    border-radius: 0 12px 12px 0;
    font-style: italic;
}

.article-body blockquote p {
    margin-bottom: 0;
}

/* 侧边栏 CTA */
.sidebar-cta {
    position: sticky;
    top: 100px;
    background: var(--bg-card);
    border: 2px solid var(--gold-primary);
    border-radius: 20px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--card-glow-gold);
}

.sidebar-cta h3 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.sidebar-cta p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.sidebar-cta .sidebar-price {
    font-size: 28px;
    font-weight: 800;
    color: var(--gold-dark);
    margin-bottom: 20px;
}

.sidebar-cta .sidebar-price span {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 400;
}

/* 导航栏下拉式文章目录 */
.articles-link-dropdown {
    position: relative;
}

.articles-link-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    width: 250px;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 12px 0;
    list-style: none;
    z-index: 10;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 13px;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.dropdown-menu li a:hover {
    background: var(--gold-light);
    color: var(--gold-dark);
}

@media (max-width: 992px) {
    .article-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar-cta {
        position: static;
        margin-top: 40px;
    }
    
    .article-body {
        padding: 30px 20px;
    }
}