:root {
    --bg-primary: #FFFFFF;
    --text-primary: #111111;
    --text-secondary: #555555;
    --border-color: #EAEAEA;
    
    /* Brand Accent */
    --brand-pink: #FF0066;
    --brand-orange: #FF6600;
    --brand-gradient: linear-gradient(135deg, var(--brand-orange), var(--brand-pink));
    
    --btn-primary-bg: #FF6600; /* 橙粉按钮 */
    --btn-primary-hover: #E65C00;
    
    --shadow-sm: 0 4px 12px rgba(0,0,0,0.05);
    --shadow-md: 0 10px 30px rgba(0,0,0,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif; }
body { background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; transition: 0.2s; }
ul { list-style: none; }

/* Navbar */
.nav { background: var(--bg-primary); border-bottom: 1px solid var(--border-color); padding: 20px 5%; display: flex; justify-content: space-between; align-items: center; position: sticky; top: 0; z-index: 1000; }
.nav-brand { font-size: 24px; font-weight: 900; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 15px; font-weight: 500; color: var(--text-secondary); }
.nav-links a:hover, .nav-links a.active { color: var(--brand-pink); }
.nav-btn { background: var(--btn-primary-bg); color: #fff !important; padding: 10px 24px; border-radius: 4px; font-weight: 600; font-size: 14px; }
.nav-btn:hover { background: var(--btn-primary-hover); }

/* Hero */
.hero { max-width: 1000px; margin: 0 auto; text-align: center; padding: 100px 20px 80px; }
.hero-tag { display: inline-block; padding: 6px 16px; background: rgba(255, 0, 102, 0.05); color: var(--brand-pink); border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 24px; text-transform: uppercase; letter-spacing: 1px; }
.hero h1 { font-size: 56px; font-weight: 800; line-height: 1.1; margin-bottom: 24px; letter-spacing: -1px; }
.hero p { font-size: 18px; color: var(--text-secondary); margin-bottom: 40px; max-width: 600px; margin-inline: auto; font-weight: 400; }

.btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { padding: 16px 36px; border-radius: 6px; font-size: 16px; font-weight: 600; cursor: pointer; transition: 0.2s; display: inline-flex; align-items: center; justify-content: center; }
.btn-primary { background: var(--btn-primary-bg); color: #fff; border: none; box-shadow: 0 4px 15px rgba(255, 102, 0, 0.3); }
.btn-primary:hover { background: var(--btn-primary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255, 102, 0, 0.4); }
.btn-secondary { background: var(--bg-primary); color: var(--text-primary); border: 2px solid var(--border-color); }
.btn-secondary:hover { border-color: var(--text-primary); background: #f9f9f9; }

/* Stats */
.stats { display: flex; justify-content: center; gap: 40px; padding: 0 20px 80px; flex-wrap: wrap; max-width: 1200px; margin: 0 auto; }
.stat-item { text-align: center; }
.stat-item h3 { font-size: 40px; font-weight: 800; margin-bottom: 4px; color: var(--text-primary); }
.stat-item p { font-size: 14px; color: var(--text-secondary); font-weight: 500; }

/* Base Layout */
.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; }
.section-title { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 50px; letter-spacing: -0.5px; }

/* About */
.about-box { background: #FAFAFA; border: 1px solid var(--border-color); padding: 60px 80px; border-radius: 12px; margin-bottom: 80px; text-align: center; }
.about-box p { font-size: 16px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; max-width: 800px; margin-inline: auto; }
.about-box p:last-child { margin-bottom: 0; }

/* Features */
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 30px; margin-bottom: 80px; }
.feat-card { background: var(--bg-primary); border: 1px solid var(--border-color); padding: 40px 30px; border-radius: 12px; transition: 0.2s; }
.feat-card:hover { border-color: var(--brand-orange); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feat-icon { font-size: 32px; margin-bottom: 20px; color: var(--brand-pink); }
.feat-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.feat-card p { font-size: 15px; color: var(--text-secondary); line-height: 1.6; }

/* Images */
.img-block { margin-bottom: 80px; border-radius: 12px; overflow: hidden; border: 1px solid var(--border-color); box-shadow: var(--shadow-sm); }
.img-block img { width: 100%; display: block; }

/* Guide */
.guide-list { max-width: 800px; margin: 0 auto 80px; }
.guide-item { display: flex; gap: 24px; padding: 30px; background: #FAFAFA; border-radius: 12px; margin-bottom: 20px; border: 1px solid var(--border-color); }
.guide-num { font-size: 24px; font-weight: 800; color: var(--brand-orange); min-width: 40px; }
.guide-info h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.guide-info p { font-size: 15px; color: var(--text-secondary); }

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto 80px; }
.faq-item { border-bottom: 1px solid var(--border-color); padding: 24px 0; }
.faq-item:first-child { border-top: 1px solid var(--border-color); }
.faq-q { font-size: 16px; font-weight: 600; margin-bottom: 12px; color: var(--text-primary); cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.faq-a { font-size: 15px; color: var(--text-secondary); line-height: 1.7; padding-right: 40px; }

/* Footer */
.footer { border-top: 1px solid var(--border-color); padding: 60px 20px; text-align: center; background: #FAFAFA; }
.footer-links { display: flex; justify-content: center; gap: 32px; margin-bottom: 24px; flex-wrap: wrap; }
.footer-links a { color: var(--text-secondary); font-size: 14px; font-weight: 500; }
.footer-links a:hover { color: var(--brand-pink); }
.footer-copy { color: #999; font-size: 13px; }

@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 40px; }
    .btn-group { flex-direction: column; padding: 0 20px; }
    .btn { width: 100%; }
    .about-box { padding: 40px 20px; }
    .guide-item { flex-direction: column; gap: 12px; }
}