/* 速云梯机场 (Suyunti Airport) Landing Page Styles */
:root {
    --primary-gradient: linear-gradient(to right, rgb(86, 204, 242), rgb(47, 128, 237));
    --primary-blue: rgb(47, 128, 237);
    --accent-cyan: rgb(86, 204, 242);
    --dark-bg: #0b0f19;
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.12);
    --card-hover-border: rgba(86, 204, 242, 0.5);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --font-kaiti: 'KaiTi', 'STKaiti', '楷体', 'FZKai-Z03S', serif;
    --shadow-glow: 0 8px 32px 0 rgba(47, 128, 237, 0.3);
    --glass-backdrop: blur(16px) saturate(180%);
}

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

html {
    scroll-behavior: smooth;
    font-family: var(--font-kaiti);
    background-color: var(--dark-bg);
    color: var(--text-main);
}

body {
    overflow-x: hidden;
    line-height: 1.6;
    background: radial-gradient(circle at 50% 0%, #1e293b 0%, #0b0f19 75%);
    min-height: 100vh;
    font-family: var(--font-kaiti);
}

h1, h2, h3, h4, h5, h6, p, li, span, a, input, button {
    font-family: var(--font-kaiti);
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

/* Background Canvas */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

.content-wrapper {
    position: relative;
    z-index: 1;
}

/* Header & Nav */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.85);
    backdrop-filter: var(--glass-backdrop);
    -webkit-backdrop-filter: var(--glass-backdrop);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 2rem;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.nav-links {
    display: flex;
    gap: 1.6rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    font-size: 1.05rem;
    color: var(--text-muted);
    font-weight: 500;
}

.nav-links a:hover {
    color: var(--accent-cyan);
    text-shadow: 0 0 10px rgba(86, 204, 242, 0.4);
}

.btn-cta {
    background: var(--primary-gradient);
    color: #ffffff !important;
    padding: 0.65rem 1.4rem;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: none;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-cta:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: 0 12px 40px 0 rgba(47, 128, 237, 0.55);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.8rem;
    cursor: pointer;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Hero Section */
.hero {
    padding: 10rem 0 5rem;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(86, 204, 242, 0.12);
    border: 1px solid rgba(86, 204, 242, 0.4);
    padding: 0.45rem 1.4rem;
    border-radius: 50px;
    font-size: 1rem;
    color: var(--accent-cyan);
    margin-bottom: 1.8rem;
    animation: pulse 2s infinite alternate;
}

@keyframes pulse {
    0% { border-color: rgba(86, 204, 242, 0.3); }
    100% { border-color: rgba(47, 128, 237, 0.9); box-shadow: 0 0 20px rgba(86, 204, 242, 0.4); }
}

.hero h1 {
    font-size: 3.3rem;
    line-height: 1.25;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, rgb(86, 204, 242), rgb(47, 128, 237));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 820px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 3.5rem;
}

.btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 0.75rem 1.8rem;
    border-radius: 50px;
    font-size: 1.1rem;
    backdrop-filter: var(--glass-backdrop);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    padding: 1.5rem;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* Sections */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-subtitle {
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 2px;
    color: var(--accent-cyan);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.section-title {
    font-size: 2.4rem;
    color: var(--text-main);
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 650px;
    margin: 0 auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    padding: 2.2rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--card-hover-border);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: rgba(86, 204, 242, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: var(--accent-cyan);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 0.8rem;
    color: #ffffff;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* Vision Box */
.vision-box {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 3rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 900px) {
    .vision-box {
        grid-template-columns: 1fr;
    }
}

.node-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.node-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1rem 1.5rem;
    border-radius: 12px;
}

.node-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.flag-icon {
    font-size: 1.5rem;
}

.node-name {
    font-weight: 600;
    font-size: 1.05rem;
}

.node-tag {
    font-size: 0.8rem;
    background: rgba(47, 128, 237, 0.25);
    color: var(--accent-cyan);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    margin-left: 0.5rem;
}

.ping-value {
    color: #10b981;
    font-weight: 600;
    font-family: monospace;
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card.featured {
    border-color: var(--accent-cyan);
    background: rgba(86, 204, 242, 0.08);
    box-shadow: 0 10px 40px rgba(47, 128, 237, 0.25);
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: var(--card-hover-border);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: var(--primary-gradient);
    color: #fff;
    font-size: 0.85rem;
    padding: 0.3rem 1rem;
    border-radius: 50px;
    font-weight: 600;
}

.plan-name {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.plan-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.plan-price {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #fff;
}

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

.plan-features {
    list-style: none;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.plan-features li {
    padding: 0.6rem 0;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.98rem;
}

.plan-features li svg {
    color: var(--accent-cyan);
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Guide Tabs */
.guide-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.tab-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 0.75rem 1.6rem;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.tab-btn.active, .tab-btn:hover {
    background: rgba(86, 204, 242, 0.18);
    border-color: var(--accent-cyan);
    color: #ffffff;
}

.guide-content {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2.5rem;
}

.client-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.client-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.client-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-cyan);
}

.client-title {
    font-size: 1.2rem;
    margin: 0.8rem 0 0.4rem;
}

.client-platform {
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 1.2rem;
}

/* Reviews */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.review-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    transition: transform 0.3s ease;
}

.review-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #fff;
}

.user-name {
    font-weight: 600;
    font-size: 1.1rem;
}

.user-role {
    font-size: 0.85rem;
    color: var(--accent-cyan);
}

.stars {
    color: #fbbf24;
    margin-bottom: 0.8rem;
}

.review-text {
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.7;
}

/* FAQ Accordion */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

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

.faq-question {
    padding: 1.5rem;
    font-size: 1.15rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
}

.faq-question:hover {
    color: var(--accent-cyan);
}

.faq-toggle {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.8;
    display: none;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 0.5rem;
    padding-top: 1.2rem;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Articles Column */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.article-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-6px);
    border-color: var(--card-hover-border);
}

.article-tag {
    align-self: flex-start;
    background: rgba(86, 204, 242, 0.15);
    color: var(--accent-cyan);
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    line-height: 1.4;
    color: #fff;
}

.article-excerpt {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1rem;
}

.read-more {
    color: var(--accent-cyan);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

/* Tags Container */
.tags-container {
    background: var(--card-bg);
    backdrop-filter: var(--glass-backdrop);
    border: 1px solid var(--card-border);
    border-radius: 24px;
    padding: 2.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
}

.tag-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.tag-item:hover {
    background: rgba(86, 204, 242, 0.2);
    border-color: var(--accent-cyan);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(86, 204, 242, 0.25);
}

/* Footer */
.footer {
    background: rgba(11, 15, 25, 0.95);
    border-top: 1px solid var(--card-border);
    padding: 4rem 0 2rem;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-col h4 {
    color: #ffffff;
    font-size: 1.1rem;
    margin-bottom: 1.2rem;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-col ul a:hover {
    color: var(--accent-cyan);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 2rem;
    text-align: center;
    font-size: 0.88rem;
}

/* Article Page Layout */
.article-header {
    padding: 10rem 0 4rem;
    text-align: center;
    background: radial-gradient(circle at 50% 20%, rgba(47, 128, 237, 0.18), transparent 70%);
}

.article-header h1 {
    font-size: 2.5rem;
    margin: 1.2rem 0;
    line-height: 1.35;
}

.article-body {
    max-width: 860px;
    margin: 0 auto;
    padding: 2rem 1.5rem 6rem;
    font-size: 1.1rem;
    line-height: 1.9;
    color: #e2e8f0;
}

.article-body h2 {
    font-size: 1.8rem;
    color: #ffffff;
    margin: 2.5rem 0 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(86, 204, 242, 0.3);
}

.article-body h3 {
    font-size: 1.4rem;
    color: var(--accent-cyan);
    margin: 1.8rem 0 1rem;
}

.article-body p {
    margin-bottom: 1.5rem;
}

.article-body ul, .article-body ol {
    margin: 1.2rem 0 1.8rem 2rem;
}

.article-body li {
    margin-bottom: 0.6rem;
}

.article-body blockquote {
    background: rgba(86, 204, 242, 0.08);
    border-left: 4px solid var(--accent-cyan);
    padding: 1.2rem 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 2rem 0;
    font-style: normal;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
}

.article-body th, .article-body td {
    padding: 1rem 1.2rem;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

.article-body th {
    background: rgba(47, 128, 237, 0.25);
    color: #ffffff;
}

.cta-box {
    background: var(--primary-gradient);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    margin: 3.5rem 0;
    color: #ffffff;
    box-shadow: var(--shadow-glow);
}

.cta-box h3 {
    font-size: 2rem;
    color: #ffffff;
    margin-bottom: 1rem;
}

.cta-box p {
    font-size: 1.15rem;
    margin-bottom: 1.8rem;
    opacity: 0.95;
}

.cta-box .btn-cta {
    background: #ffffff;
    color: var(--primary-blue) !important;
    font-weight: 700;
    padding: 0.85rem 2.2rem;
    font-size: 1.1rem;
}

.cta-box .btn-cta:hover {
    background: #f8fafc;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-toggle {
        display: block;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .article-header h1 {
        font-size: 1.8rem;
    }
}