:root {
    --brand: #00d075;
    --brand-dark: #00a65d;
    --bg-dark: #061a11;
    --bg-darker: #030d08;
    --text-main: #ffffff;
    --text-muted: #94bba8;
    --surface: #0a261a;
    --surface-light: #103827;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; background: var(--bg-dark); color: var(--text-main); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 16px 40px; border-radius: 40px; font-weight: 700; font-size: 18px; transition: all 0.3s; cursor: pointer; border: 2px solid transparent; }
.btn-primary { background: var(--brand); color: #000; box-shadow: 0 10px 30px rgba(0, 208, 117, 0.3); }
.btn-primary:hover { background: #00ea84; transform: translateY(-3px); box-shadow: 0 15px 40px rgba(0, 208, 117, 0.4); }
.btn-outline { background: rgba(0,208,117,0.1); color: var(--brand); border-color: var(--brand); backdrop-filter: blur(10px); }
.btn-outline:hover { background: var(--brand); color: #000; transform: translateY(-3px); }

/* Nav */
.navbar { position: fixed; top: 0; width: 100%; display: flex; justify-content: space-between; align-items: center; padding: 0 5%; height: 80px; background: rgba(6, 26, 17, 0.85); backdrop-filter: blur(20px); z-index: 1000; border-bottom: 1px solid rgba(0,208,117,0.15); }
.logo { font-size: 24px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 12px; }
.logo svg { fill: var(--brand); }
.nav-links a { margin: 0 20px; font-size: 16px; color: var(--text-muted); font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: var(--brand); }

/* Hero - 大屏展示风 */
.hero { padding: 160px 5% 0; text-align: center; background: radial-gradient(circle at top center, #104a32 0%, var(--bg-dark) 70%); position: relative; }
.hero h1 { font-size: 72px; margin: 0 0 20px; font-weight: 900; letter-spacing: -2px; text-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.hero h2 { font-size: 28px; color: var(--brand); font-weight: 500; margin: 0 0 30px; }
.hero p { font-size: 20px; color: var(--text-muted); max-width: 800px; margin: 0 auto 50px; }
.hero-actions { display: flex; justify-content: center; gap: 20px; margin-bottom: 80px; }
.hero-screen { max-width: 1400px; margin: 0 auto; position: relative; z-index: 2; transform: perspective(1000px) rotateX(2deg); transition: transform 0.5s; }
.hero-screen:hover { transform: perspective(1000px) rotateX(0deg); }
.hero-screen img { width: 100%; border-radius: 24px 24px 0 0; border: 4px solid #1a4a35; border-bottom: none; box-shadow: 0 -20px 100px rgba(0,208,117,0.25), 0 30px 60px rgba(0,0,0,0.6); display: block; }
.hero-screen::after { content: ''; position: absolute; inset: 0; border-radius: 24px 24px 0 0; box-shadow: inset 0 2px 0 rgba(255,255,255,0.2); pointer-events: none; }

/* Core Points */
.core-points { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; padding: 60px 5%; background: var(--bg-darker); border-top: 1px solid #103827; }
.point { text-align: center; padding: 30px 20px; background: var(--surface); border-radius: 16px; border: 1px solid var(--surface-light); transition: transform 0.3s; }
.point:hover { transform: translateY(-5px); border-color: var(--brand); }
.point h3 { color: var(--brand); font-size: 20px; margin: 0 0 10px; }
.point p { margin: 0; font-size: 15px; color: var(--text-muted); }

/* Features */
.features { padding: 120px 5%; }
.section-title { text-align: center; margin-bottom: 80px; }
.section-title h2 { font-size: 48px; margin: 0 0 20px; }
.section-title p { font-size: 18px; color: var(--text-muted); }
.feature-row { display: flex; align-items: center; gap: 80px; margin-bottom: 100px; max-width: 1400px; margin-left: auto; margin-right: auto; }
.feature-row.reverse { flex-direction: row-reverse; }
.feature-text { flex: 1; }
.feature-text h3 { font-size: 36px; margin: 0 0 24px; color: #fff; }
.feature-text p { font-size: 18px; color: var(--text-muted); line-height: 1.8; }
.feature-img { flex: 1.2; position: relative; }
.feature-img img { width: 100%; border-radius: 20px; box-shadow: 0 30px 60px rgba(0,0,0,0.5); border: 1px solid var(--surface-light); }
.feature-img::before { content:''; position: absolute; inset: -20px; background: radial-gradient(circle, rgba(0,208,117,0.15), transparent 70%); z-index: -1; }

/* Compare Table */
.compare-section { padding: 100px 5%; background: var(--bg-darker); }
.compare-table { width: 100%; max-width: 1200px; margin: 0 auto; background: var(--surface); border-radius: 20px; overflow: hidden; border: 1px solid var(--surface-light); border-collapse: collapse; }
.compare-table th, .compare-table td { padding: 24px; text-align: center; border-bottom: 1px solid var(--surface-light); }
.compare-table th { background: #0c2e1f; font-size: 18px; color: #fff; border-bottom: 2px solid var(--brand); }
.compare-table td { font-size: 16px; color: var(--text-muted); }
.compare-table td:nth-child(2) { background: rgba(0,208,117,0.05); color: var(--brand); font-weight: bold; border-left: 1px solid var(--surface-light); border-right: 1px solid var(--surface-light); }
.compare-table tr:last-child td { border-bottom: none; }

/* Versions */
.versions-section { padding: 120px 5%; }
.version-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; max-width: 1400px; margin: 0 auto; }
.v-card { background: var(--surface); border-radius: 24px; padding: 50px 40px; text-align: center; border: 1px solid var(--surface-light); transition: all 0.4s; position: relative; overflow: hidden; }
.v-card:hover { transform: translateY(-10px); border-color: var(--brand); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.v-card img { width: 120px; height: 120px; border-radius: 24px; margin-bottom: 30px; object-fit: cover; box-shadow: 0 10px 20px rgba(0,0,0,0.3); }
.v-card h3 { font-size: 28px; margin: 0 0 16px; }
.v-card p { font-size: 16px; color: var(--text-muted); margin: 0 0 40px; min-height: 50px; }

/* Data Proof */
.data-proof { background: linear-gradient(90deg, #0a261a, #004d2b, #0a261a); padding: 80px 5%; display: flex; justify-content: center; gap: 100px; text-align: center; border-top: 1px solid var(--brand-dark); border-bottom: 1px solid var(--brand-dark); }
.stat strong { font-size: 64px; color: #fff; font-weight: 900; display: block; margin-bottom: 10px; text-shadow: 0 4px 10px rgba(0,0,0,0.3); }
.stat p { font-size: 20px; color: #a1e6c9; margin: 0; }

/* FAQ */
.faq-section { padding: 100px 5%; background: var(--bg-darker); }
.faq-container { max-width: 900px; margin: 0 auto; }
.faq-item { background: var(--surface); border-radius: 16px; padding: 30px 40px; margin-bottom: 20px; border: 1px solid var(--surface-light); border-left: 4px solid var(--brand); }
.faq-item h4 { font-size: 20px; margin: 0 0 15px; color: #fff; }
.faq-item p { font-size: 16px; color: var(--text-muted); margin: 0; line-height: 1.7; }

/* Footer */
footer { background: #020805; padding: 80px 5% 40px; text-align: center; border-top: 1px solid #103827; }
footer img { width: 120px; border-radius: 20px; margin-bottom: 30px; opacity: 0.8; }
footer p { color: #5a7d6b; font-size: 15px; margin: 5px 0; }