:root {
    --bg-color: #0A0F14;
    --panel-color: #111A22;
    --accent: #45E0CE;
    --text-color: #9FB3BC;
    --headline-color: #F2F7F8;
    --hairline: #1E2A33;
    
    --font-sans-en: 'Space Grotesk', sans-serif;
    --font-sans-zh: 'Noto Sans SC', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans-zh);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.mono-font { font-family: var(--font-mono); }
.space-font { font-family: var(--font-sans-en); }
.cyan-text { color: var(--accent); }

a { text-decoration: none; color: var(--text-color); transition: color 0.2s; }
a:hover { color: var(--accent); }

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

/* Typography */
h1, h2, h3 { color: var(--headline-color); line-height: 1.2; }
.micro-label { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent); text-transform: uppercase; margin-bottom: 1rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    text-align: center;
}
.btn-primary {
    background-color: var(--accent);
    color: var(--bg-color);
    border: 1px solid var(--accent);
}
.btn-primary:hover {
    background-color: transparent;
    color: var(--accent);
}
.btn-outline {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--hairline);
}
.btn-outline:hover {
    border-color: var(--accent);
}
.btn-text {
    background: transparent;
    color: var(--text-color);
    text-decoration: underline;
    font-size: 0.85rem;
    padding: 10px;
    border: 1px solid transparent;
}
.btn-text:hover { color: var(--accent); }
.btn-large { padding: 14px 32px; font-size: 1rem; }
.btn-block { display: block; width: 100%; }

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(10, 15, 20, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--hairline);
    z-index: 100;
    padding: 15px 0;
}
.nav-container { display: flex; justify-content: space-between; align-items: center; }
.logo-wrapper { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 28px; height: 28px; }
.wordmark { font-family: var(--font-sans-en); color: var(--headline-color); font-weight: 700; font-size: 1.2rem; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { font-family: var(--font-mono); font-size: 0.9rem; text-transform: uppercase; }

/* Dot Grid Background */
.dot-grid {
    background-image: radial-gradient(var(--hairline) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Hero Section */
.hero { padding: 120px 0 80px; position: relative; }
.hero-content { max-width: 800px; margin-bottom: 60px; }
.eng-title { font-size: 3.5rem; color: var(--accent); margin-bottom: 10px; line-height: 1; }
.zh-title { font-size: 2.2rem; margin-bottom: 20px; }
.hero-desc { font-size: 1.1rem; max-width: 600px; margin-bottom: 40px; }
.hero-actions { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }

/* Terminal Card */
.terminal-card {
    background-color: var(--panel-color);
    border: 1px solid var(--hairline);
    border-radius: 4px;
    overflow: hidden;
    max-width: 700px;
}
.term-header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--hairline);
    padding: 10px 15px;
    display: flex;
    gap: 6px;
}
.term-dot { width: 10px; height: 10px; border-radius: 50%; background-color: var(--hairline); }
.term-body { padding: 20px; font-size: 0.9rem; color: var(--text-color); }
.term-line { margin-bottom: 8px; }
.term-line .prompt { color: var(--hairline); }

/* Grid Sections */
.section { padding: 80px 0; border-top: 1px solid var(--hairline); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background-color: var(--hairline); border: 1px solid var(--hairline); }
.feature-cell { background-color: var(--bg-color); padding: 40px; }
.cell-index { color: var(--accent); margin-bottom: 20px; font-size: 0.9rem; }
.feature-cell h3 { margin-bottom: 15px; font-size: 1.3rem; }

/* Pricing Grid */
.mb-2 { margin-bottom: 10px; }
.section-title { font-size: 2rem; margin-bottom: 40px; }
.pricing-cell { background-color: var(--bg-color); padding: 40px; display: flex; flex-direction: column; }
.primary-cell { background-color: var(--panel-color); }
.instance-type { font-size: 1.1rem; color: var(--headline-color); margin-bottom: 20px; }
.price { font-size: 2.5rem; color: var(--headline-color); margin-bottom: 30px; }
.price span { font-size: 1rem; color: var(--text-color); }
.specs { list-style: none; margin-bottom: 40px; flex-grow: 1; }
.specs li { padding: 10px 0; border-bottom: 1px solid var(--hairline); font-family: var(--font-mono); font-size: 0.9rem; }
.specs li:last-child { border-bottom: none; }

/* Footer */
footer { border-top: 1px solid var(--hairline); padding: 40px 0; background-color: var(--bg-color); }
.footer-grid { display: flex; justify-content: space-between; align-items: center; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-family: var(--font-mono); font-size: 0.9rem; }
.copyright { font-size: 0.85rem; color: var(--hairline); }

/* Subpages Basic Content */
.content-page { padding: 80px 0; min-height: 70vh; }
.content-page h1 { font-family: var(--font-sans-en); color: var(--accent); font-size: 2.5rem; margin-bottom: 40px; }
.content-page h2 { font-size: 1.5rem; margin: 30px 0 15px; }
.content-page p { margin-bottom: 15px; }
.content-page ul { margin-left: 20px; margin-bottom: 20px; }
.content-page li { margin-bottom: 5px; }


/* Responsive */
@media (max-width: 992px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .grid-3 { grid-template-columns: 1fr; }
    .eng-title { font-size: 2.5rem; }
    .zh-title { font-size: 1.8rem; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .footer-grid { flex-direction: column; gap: 20px; text-align: center; }
    .btn-large { padding: 16px 20px; width: 100%; } /* larger tap target for mobile */
}

/* Guides/Blog Styles */
.article-header { padding: 60px 0 30px; border-bottom: 1px solid var(--hairline); margin-bottom: 40px; }
.breadcrumb { font-family: var(--font-mono); font-size: 0.85rem; color: var(--hairline); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-color); }
.article-meta { display: flex; gap: 20px; font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-color); margin-top: 20px; flex-wrap: wrap; }
.article-content { max-width: 800px; margin: 0 auto; padding-bottom: 80px; }
.article-content h2 { margin: 40px 0 20px; color: var(--headline-color); }
.article-content h3 { margin: 30px 0 15px; color: var(--headline-color); font-size: 1.2rem; }
.article-content p { margin-bottom: 20px; line-height: 1.8; }
.article-content ul, .article-content ol { margin: 0 0 20px 20px; line-height: 1.8; }
.article-content li { margin-bottom: 10px; }
.article-content a { color: var(--accent); text-decoration: underline; }
.article-content blockquote { border-left: 3px solid var(--accent); padding-left: 15px; margin-bottom: 20px; color: #7a8c96; }

/* News Cards */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background-color: var(--hairline); border: 1px solid var(--hairline); }
.news-card { background-color: var(--bg-color); padding: 30px; display: flex; flex-direction: column; }
.news-category { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent); margin-bottom: 15px; text-transform: uppercase; }
.news-card h3 { font-size: 1.2rem; margin-bottom: 15px; }
.news-card h3 a { color: var(--headline-color); text-decoration: none; }
.news-card h3 a:hover { color: var(--accent); }
.news-card p { font-size: 0.95rem; color: var(--text-color); margin-bottom: 20px; flex-grow: 1; }
.news-meta { font-family: var(--font-mono); font-size: 0.8rem; color: #5a6c76; margin-bottom: 20px; display: flex; gap: 15px; }
.view-more-container { text-align: center; margin-top: 40px; }

@media (max-width: 992px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .news-grid { grid-template-columns: 1fr; }
}

/* Floating Tools */
.floating-tools {
    position: fixed;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 999;
}
.f-btn {
    width: 45px;
    height: 45px;
    background-color: var(--panel-color);
    border: 1px solid var(--hairline);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}
.f-btn:hover {
    background-color: var(--accent);
    color: var(--bg-color);
    transform: translateY(-3px);
}
@media (max-width: 768px) {
    .floating-tools { bottom: 20px; right: 20px; }
}

/* FAQ Section */
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}
.faq-item {
    background-color: var(--panel-color);
    border: 1px solid var(--hairline);
    padding: 30px;
}
.faq-item h4 { margin-bottom: 15px; font-size: 1.15rem; color: var(--headline-color); }
@media (max-width: 768px) { .faq-grid { grid-template-columns: 1fr; } }

/* Hero Image */
.hero-image-wrapper {
    margin: 40px auto;
    max-width: 900px;
    border: 1px solid var(--accent);
    padding: 10px;
    background: var(--panel-color);
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
}
.hero-image-wrapper::before {
    content: ''; position: absolute; top: -5px; left: -5px; width: 10px; height: 10px; background: var(--accent);
}
.hero-image-wrapper::after {
    content: ''; position: absolute; bottom: -5px; right: -5px; width: 10px; height: 10px; background: var(--accent);
}
.hero-image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    filter: contrast(1.1) brightness(0.9);
}

/* Next Article */
.next-article-box {
    margin-top: 60px;
    padding: 40px;
    background: var(--panel-color);
    border: 1px solid var(--accent);
    text-align: center;
}
.next-article-box h4 { margin-bottom: 10px; color: var(--text-color); font-size: 0.9rem; text-transform: uppercase; letter-spacing: 2px;}
.next-article-box h3 { font-size: 1.5rem; margin-bottom: 20px; }
.next-article-box a { color: var(--headline-color); text-decoration: none; }
.next-article-box a:hover { color: var(--accent); }

/* Trust & Social Proof */
.trust-badge {
    padding: 15px 25px;
    background: rgba(17, 26, 34, 0.5);
    border: 1px solid var(--hairline);
    border-radius: 4px;
    transition: all 0.3s ease;
}
.trust-badge:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}
.social-icons {
    display: flex;
    gap: 15px;
    margin-bottom: 5px;
}
.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: var(--panel-color);
    border: 1px solid var(--hairline);
    color: var(--text-color);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}
.social-icons a:hover {
    background: var(--accent);
    color: var(--bg-color);
    border-color: var(--accent);
}