* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    color: #1a1a2e; background: #fff; line-height: 1.6;
}

/* 顶部导航 */
.navbar {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(8px);
}
.nav-inner {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.9rem 2rem; max-width: 1100px; margin: 0 auto;
}
.brand { font-size: 1.15rem; font-weight: 700; color: #1a1a2e; text-decoration: none; }
.nav-links a {
    color: #444; text-decoration: none; font-size: 0.95rem;
    margin-left: 1.6rem; font-weight: 500; transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: #667eea; }
@media (max-width: 700px) {
    .nav-inner { flex-direction: column; gap: 0.4rem; padding: 0.8rem 1rem; }
    .nav-links a { margin: 0 0.6rem; font-size: 0.9rem; }
}

/* 首页大图 */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff; text-align: center; padding: 2rem;
}
.hero-content h1 { font-size: 3.5rem; font-weight: 800; margin-bottom: 1rem; }
.hero-content p { font-size: 1.3rem; opacity: 0.9; max-width: 600px; margin: 0 auto 2rem; }
.btn {
    display: inline-block; padding: 0.9rem 2.5rem; border-radius: 50px;
    text-decoration: none; font-weight: 600; font-size: 1rem; transition: transform 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: #fff; color: #667eea; }
.btn-outline { border: 2px solid #fff; color: #fff; margin-left: 1rem; }

/* 内页横幅 */
.page-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff; text-align: center; padding: 5rem 2rem;
}
.page-hero h1 { font-size: 2.6rem; font-weight: 800; margin-bottom: 0.8rem; }
.page-hero p { font-size: 1.15rem; opacity: 0.9; }

section { padding: 5rem 2rem; }
.container { max-width: 1100px; margin: 0 auto; }
.features { background: #f8f9ff; }
.section-title { text-align: center; font-size: 2.2rem; font-weight: 700; margin-bottom: 1rem; }
.section-subtitle { text-align: center; color: #666; font-size: 1.1rem; margin-bottom: 3rem; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-card {
    background: #fff; border-radius: 16px; padding: 2.5rem; text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: transform 0.2s;
}
.feature-card:hover { transform: translateY(-4px); }
.feature-icon { font-size: 3rem; margin-bottom: 1rem; }
.feature-card h3 { font-size: 1.3rem; margin-bottom: 0.8rem; }
.feature-card p { color: #666; font-size: 1rem; }
.how-it-works { background: #fff; }
.steps { display: flex; justify-content: center; gap: 3rem; flex-wrap: wrap; margin-top: 2rem; }
.step { text-align: center; max-width: 250px; }
.step-number {
    width: 60px; height: 60px; border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff; font-size: 1.5rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1rem;
}
.step h4 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.step p { color: #666; font-size: 0.95rem; }
.screenshots { background: #f8f9ff; text-align: center; }
.screenshot-img {
    max-width: 800px; margin: 2rem auto 0;
    border-radius: 16px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.15);
    width: 100%; height: auto;
}
.contact { background: #1a1a2e; color: #fff; text-align: center; }
.contact .section-title { color: #fff; }
.contact p { opacity: 0.8; margin-bottom: 1rem; font-size: 1.05rem; }
.contact a { color: #667eea; text-decoration: none; }

/* 内页正文卡片 */
.content-block { background: #f8f9ff; }
.info-card {
    background: #fff; border-radius: 16px; padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); margin-bottom: 2rem;
}
.info-card h2 { font-size: 1.5rem; margin-bottom: 1rem; color: #1a1a2e; }
.info-card p, .info-card li { color: #555; font-size: 1rem; margin-bottom: 0.6rem; }
.info-card ul { padding-left: 1.4rem; }
.price-box {
    background: #fff; border: 2px solid #667eea; border-radius: 16px;
    padding: 2rem; text-align: center; max-width: 420px; margin: 2rem auto;
}
.price-box .price { font-size: 2.8rem; font-weight: 800; color: #667eea; }
.price-box .unit { font-size: 1rem; color: #666; }
.step-list { max-width: 700px; margin: 0 auto; }
.step-item {
    display: flex; gap: 1rem; align-items: flex-start;
    background: #fff; border-radius: 12px; padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); margin-bottom: 1rem;
}
.step-item .num {
    flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
}
.step-item h3 { font-size: 1.1rem; margin-bottom: 0.3rem; }
.step-item p { color: #666; font-size: 0.95rem; }

footer {
    text-align: center; padding: 2rem; background: #111; color: #888; font-size: 0.85rem;
}
footer a { color: #aaa; text-decoration: none; margin: 0 0.5rem; }
@media (max-width: 600px) {
    .hero-content h1 { font-size: 2.2rem; }
    .hero-content p { font-size: 1.1rem; }
    .btn-outline { margin-left: 0; margin-top: 0.8rem; }
    .steps { flex-direction: column; align-items: center; }
}