/* 一元机场 - 极致纯净极简风 */
:root {
    --bg-color: #F9F9F6;
    --text-main: #2C2C2C;
    --text-muted: #888888;
    --accent: #1A1A1A;
    --border-color: #E6E6E6;
    --font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
h1, h2, h3 { font-weight: 500; line-height: 1.3; }
a { color: var(--text-main); text-decoration: none; }

/* Header */
header { padding: 2.5rem 0; }
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.25rem; font-weight: 600; letter-spacing: 1px; }
nav a { margin-left: 2.5rem; font-size: 0.95rem; color: var(--text-muted); transition: color 0.3s ease; }
nav a:hover { color: var(--text-main); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-align: center;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #333; transform: translateY(-2px); box-shadow: 0 8px 15px rgba(0,0,0,0.1); }
.btn-seo { background: transparent; color: var(--text-main); border: 1px solid var(--border-color); }
.btn-seo:hover { background: rgba(0,0,0,0.03); transform: translateY(-2px); border-color: var(--text-muted); }

/* Sections */
section { padding: 8rem 0; }
.section-title { font-size: 2.2rem; margin-bottom: 3.5rem; letter-spacing: 1px; text-align: center; }

/* Hero */
.hero { padding-top: 6rem; padding-bottom: 10rem; }
.hero-layout { display: flex; align-items: center; justify-content: space-between; gap: 4rem; }
.hero-content { flex: 1; text-align: left; }
.hero-title { font-size: 3.5rem; margin-bottom: 1.5rem; letter-spacing: -1px; line-height: 1.2; font-weight: 600; }
.hero-desc { font-size: 1.2rem; color: var(--text-muted); margin-bottom: 2.5rem; max-width: 500px; }
.hero-buttons { display: flex; gap: 1.5rem; }

/* Hero Visual (Dynamic Card) */
.hero-visual { flex: 1; display: flex; justify-content: center; position: relative; }
.minimal-card {
    background: #fff; border: 1px solid var(--border-color); border-radius: 1.5rem;
    padding: 3.5rem 3rem; position: relative; animation: float 6s ease-in-out infinite;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05); width: 100%; max-width: 320px;
    text-align: center;
}
.card-glow {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 150px; height: 150px; background: rgba(0,0,0,0.05); filter: blur(50px);
    z-index: -1; animation: pulse 4s ease-in-out infinite;
}
.speed-icon { font-size: 4.5rem; display: block; margin-bottom: 1rem; }
.ping-text { font-size: 1.25rem; font-weight: 600; margin-bottom: 1.5rem; color: var(--text-main); }
.ping-value { color: #4caf50; }
.status-bar { width: 100%; height: 4px; background: var(--bg-color); border-radius: 2px; overflow: hidden; }
.status-bar::after {
    content: ''; display: block; width: 50%; height: 100%; background: var(--text-main);
    border-radius: 2px; animation: loading 2s infinite ease-in-out;
}

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2.5rem; }
.pricing-card {
    background: #fff; border: 1px solid var(--border-color); border-radius: 1rem;
    padding: 3rem; text-align: center; transition: transform 0.3s;
}
.pricing-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0,0,0,0.04); border-color: transparent; }
.pricing-card.featured { border: 2px solid var(--accent); position: relative; }
.pricing-card.featured:hover { border-color: var(--accent); }
.pricing-card .badge {
    position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
    background: var(--accent); color: #fff; padding: 0.25rem 1rem; font-size: 0.85rem; border-radius: 9999px;
}
.pricing-card h3 { font-size: 1.25rem; color: var(--text-muted); margin-bottom: 1rem; }
.pricing-card .price { font-size: 3.5rem; font-weight: 300; margin-bottom: 2.5rem; color: var(--text-main); letter-spacing: -1px; }
.pricing-card .price span { font-size: 1rem; color: var(--text-muted); letter-spacing: 0; }
.pricing-card ul { list-style: none; margin-bottom: 2.5rem; text-align: left; }
.pricing-card ul li { margin-bottom: 1rem; color: var(--text-main); display: flex; align-items: center; font-size: 0.95rem; }
.pricing-card ul li::before { content: '·'; color: var(--accent); margin-right: 0.75rem; font-weight: bold; font-size: 1.5rem; }
.pricing-card .btn { width: 100%; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border-color); padding: 2rem 0; }
.faq-item summary { font-size: 1.25rem; cursor: pointer; list-style: none; position: relative; padding-right: 2rem; outline: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
    content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%);
    font-size: 1.8rem; font-weight: 300; color: var(--text-muted); transition: transform 0.3s ease;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item p { margin-top: 1.5rem; color: var(--text-muted); padding-right: 2rem; }

/* Subscribe / Copy Link */
.subscribe-desc { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 2.5rem; max-width: 600px; margin-left: auto; margin-right: auto; text-align: center; }
.copy-box { display: flex; max-width: 600px; margin: 0 auto; border: 1px solid var(--border-color); background: #ffffff; border-radius: 4px; overflow: hidden; }
.copy-box input { flex: 1; border: none; padding: 1.2rem 1.5rem; font-size: 1rem; color: var(--text-muted); outline: none; background: transparent; }
.btn-copy { background: var(--accent); color: #ffffff; border: none; padding: 0 2.5rem; cursor: pointer; font-size: 1rem; transition: background 0.3s ease; }
.btn-copy:hover { background: #333333; }
.copy-msg { margin-top: 1rem; font-size: 0.9rem; color: #4caf50; opacity: 0; transition: opacity 0.3s ease; text-align: center; }
.copy-msg.show { opacity: 1; }

/* Footer */
footer { padding: 4rem 0; border-top: 1px solid var(--border-color); }
.footer-container { display: flex; justify-content: space-between; align-items: center; color: var(--text-muted); font-size: 0.9rem; }
.footer-links a { color: var(--text-muted); margin-right: 1.5rem; transition: color 0.3s; }
.footer-links a:hover { color: var(--text-main); }
.seo-link { color: var(--text-muted); opacity: 0.4; transition: opacity 0.3s ease; text-decoration: underline; }
.seo-link:hover { opacity: 1; }

/* Animations */
@keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-15px); } 100% { transform: translateY(0px); } }
@keyframes pulse { 0% { opacity: 0.02; transform: translate(-50%, -50%) scale(1); } 50% { opacity: 0.08; transform: translate(-50%, -50%) scale(1.1); } 100% { opacity: 0.02; transform: translate(-50%, -50%) scale(1); } }
@keyframes loading { 0% { transform: translateX(-100%); } 100% { transform: translateX(200%); } }

/* Features, Ecosystem & Reviews */
.features-grid, .ecosystem-grid, .reviews-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2.5rem; }
.feature-card, .ecosystem-card, .review-card {
    background: #fff; border: 1px solid var(--border-color); border-radius: 1rem;
    padding: 2.5rem; transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover, .ecosystem-card:hover, .review-card:hover {
    transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,0,0,0.03);
}
.feature-icon { font-size: 2.5rem; margin-bottom: 1.5rem; display: block; }
.feature-card h3, .ecosystem-card h3 { font-size: 1.35rem; margin-bottom: 1rem; color: var(--text-main); }
.feature-card p, .ecosystem-card p, .review-text { color: var(--text-muted); font-size: 1rem; line-height: 1.6; }

/* Reviews */
.review-stars { color: var(--accent); font-size: 1.2rem; margin-bottom: 1rem; letter-spacing: 2px; }
.review-text { font-style: italic; margin-bottom: 1.5rem; }
.review-author { font-size: 0.9rem; font-weight: 600; color: var(--text-main); }

/* Responsive */
@media (max-width: 768px) {
    .hero-layout { flex-direction: column; text-align: center; gap: 3rem; }
    .hero-content { text-align: center; }
    .hero-title { font-size: 2.5rem; }
    .hero-desc { margin: 0 auto 2.5rem; font-size: 1.1rem; }
    .hero-buttons { flex-direction: column; gap: 1rem; }
    .btn { width: 100%; padding: 1.2rem; }
    .header-container { flex-direction: column; align-items: center; gap: 1rem; }
    nav { 
        display: flex; 
        overflow-x: auto; 
        width: 100%;
        padding-bottom: 0.5rem; 
        -webkit-overflow-scrolling: touch; 
        scrollbar-width: none; 
    }
    nav::-webkit-scrollbar { display: none; }
    nav a { margin: 0 1.2rem 0 0 !important; font-size: 0.95rem; }
    nav a:last-child { margin-right: 0 !important; }
    .pricing-card.featured { transform: none; }
    .pricing-card.featured:hover { transform: translateY(-5px); }
    .footer-container { flex-direction: column; gap: 1.5rem; text-align: center; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; margin-bottom: 1rem; }
    .footer-links a { margin: 0; }
    
    .copy-box { flex-direction: column; border-radius: 6px; }
    .copy-box input { border-bottom: 1px solid var(--border-color); padding: 1rem; }
    .btn-copy { padding: 1rem; width: 100%; }
}