/* ===== 基础重置 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: #1a1a2e;
    line-height: 1.6;
    overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }

/* ===== 导航栏 ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transition: box-shadow 0.3s;
}
.navbar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
.nav-content { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: #16a34a; }
.logo-img { height: 36px; width: auto; }
.logo-img-sm { height: 28px; width: auto; border-radius: 4px; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 15px; color: #555; transition: color 0.2s; }
.nav-links a:hover { color: #16a34a; }
.nav-cta {
    padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 500;
    background: linear-gradient(135deg, #22c55e, #16a34a); color: #fff;
    transition: transform 0.2s, box-shadow 0.2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(34,197,94,0.4); }

/* ===== Hero ===== */
.hero {
    position: relative; padding: 140px 0 100px; min-height: 100vh;
    display: flex; align-items: center; overflow: hidden;
}
.hero-bg {
    position: absolute; top: -50%; right: -20%; width: 80%; height: 200%;
    background: radial-gradient(ellipse, rgba(34,197,94,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; }
.hero-badge {
    display: inline-block; padding: 6px 16px; border-radius: 20px; font-size: 14px;
    background: rgba(34,197,94,0.1); color: #16a34a; margin-bottom: 20px;
}
.hero h1 { font-size: 52px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
.gradient-text {
    background: linear-gradient(135deg, #22c55e, #0ea5e9);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-desc { font-size: 18px; color: #666; margin-bottom: 32px; max-width: 480px; }
.hero-actions { display: flex; gap: 16px; margin-bottom: 40px; }
.btn {
    padding: 14px 32px; border-radius: 8px; font-size: 16px; font-weight: 600;
    transition: all 0.2s; cursor: pointer;
}
.btn-primary { background: linear-gradient(135deg, #22c55e, #16a34a); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(34,197,94,0.35); }
.btn-outline { border: 2px solid #e5e7eb; color: #333; }
.btn-outline:hover { border-color: #22c55e; color: #16a34a; }
.hero-trust { display: flex; gap: 40px; }
.trust-item { display: flex; flex-direction: column; }
.trust-item strong { font-size: 24px; color: #16a34a; }
.trust-item span { font-size: 13px; color: #999; }

/* 手机模型 */
.phone-mockup {
    width: 280px; margin: 0 auto; padding: 12px; border-radius: 36px;
    background: #1a1a2e; box-shadow: 0 40px 80px rgba(0,0,0,0.15);
}
.phone-screen {
    border-radius: 26px; background: #fff; padding: 20px 16px; min-height: 480px;
    display: flex; flex-direction: column; gap: 16px;
}
.app-header { text-align: center; font-size: 18px; font-weight: 700; color: #16a34a; }
.app-search {
    padding: 10px 14px; border-radius: 8px; background: #f3f4f6;
    font-size: 13px; color: #999;
}
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.app-item {
    padding: 16px 8px; border-radius: 12px; background: #f0fdf4;
    text-align: center; font-size: 12px; color: #333; line-height: 1.8;
}
.app-btn {
    margin-top: auto; padding: 14px; border-radius: 10px; text-align: center;
    background: linear-gradient(135deg, #22c55e, #16a34a); color: #fff;
    font-size: 15px; font-weight: 600;
}

/* ===== 通用 Section ===== */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header h2 { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.section-header p { font-size: 17px; color: #888; }
.section-header.light h2 { color: #fff; }
.section-header.light p { color: rgba(255,255,255,0.7); }

/* ===== 功能 ===== */
.features { padding: 100px 0; background: #fafafa; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
    padding: 36px 28px; border-radius: 16px; background: #fff;
    border: 1px solid #f0f0f0; transition: all 0.3s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,0.08); border-color: #bbf7d0; }
.feature-icon { font-size: 40px; margin-bottom: 16px; }
.feature-card h3 { font-size: 19px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: #777; line-height: 1.7; }

/* ===== 流程 ===== */
.how-it-works { padding: 100px 0; }
.steps { display: flex; align-items: flex-start; justify-content: center; gap: 20px; }
.step { text-align: center; max-width: 260px; position: relative; }
.step-number {
    font-size: 64px; font-weight: 900; color: rgba(34,197,94,0.1);
    position: absolute; top: -20px; left: 50%; transform: translateX(-50%);
}
.step-icon { font-size: 48px; margin-bottom: 16px; position: relative; }
.step h3 { font-size: 20px; margin-bottom: 8px; }
.step p { font-size: 14px; color: #888; }
.step-arrow { font-size: 32px; color: #22c55e; margin-top: 60px; }

/* ===== 数据 ===== */
.stats {
    padding: 100px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 32px 16px; }
.stat-value { font-size: 48px; font-weight: 800; color: #22c55e; display: inline; }
.stat-suffix { font-size: 24px; color: #22c55e; font-weight: 600; }
.stat-label { font-size: 15px; color: rgba(255,255,255,0.6); margin-top: 8px; }

/* ===== 优势对比 ===== */
.advantages { padding: 100px 0; background: #fafafa; }
.advantages-grid { max-width: 800px; margin: 0 auto; }
.advantage-vs { display: flex; gap: 40px; margin-bottom: 24px; padding: 0 20px; }
.advantage-vs .old { color: #999; font-size: 15px; }
.advantage-vs .new { color: #16a34a; font-size: 15px; font-weight: 600; }
.advantage-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
    padding: 16px 20px; border-radius: 10px; margin-bottom: 8px;
}
.advantage-row:nth-child(odd) { background: #fff; }
.old-text { color: #999; font-size: 14px; }
.new-text { color: #333; font-size: 14px; font-weight: 500; }

/* ===== 下载 ===== */
.download { padding: 100px 0; }
.download-content { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.download-text h2 { font-size: 36px; font-weight: 700; margin-bottom: 16px; }
.download-text > p { font-size: 17px; color: #666; margin-bottom: 28px; }
.download-features { display: flex; flex-direction: column; gap: 12px; }
.dl-feature { font-size: 15px; color: #333; }
.download-qr { display: flex; justify-content: center; }
.qr-box {
    text-align: center; padding: 32px; border-radius: 20px;
    background: #fff; box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.qr-placeholder {
    width: 180px; height: 180px; margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 12px; background: #f9fafb;
}
.qr-box p { font-size: 14px; color: #666; }

/* ===== Footer ===== */
.footer { background: #1a1a2e; padding: 60px 0 30px; color: #fff; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.8; }
.footer-links h4 { font-size: 15px; margin-bottom: 16px; color: rgba(255,255,255,0.9); }
.footer-links a { display: block; font-size: 14px; color: rgba(255,255,255,0.5); margin-bottom: 10px; transition: color 0.2s; }
.footer-links a:hover { color: #22c55e; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-icp { margin-top: 8px; }
.footer-icp a { color: rgba(255,255,255,0.4); text-decoration: none; transition: color 0.2s; }
.footer-icp a:hover { color: #22c55e; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-content { grid-template-columns: 1fr; text-align: center; }
    .hero h1 { font-size: 36px; }
    .hero-desc { margin: 0 auto 32px; }
    .hero-actions { justify-content: center; }
    .hero-trust { justify-content: center; }
    .hero-visual { display: none; }
    .features-grid { grid-template-columns: 1fr; }
    .steps { flex-direction: column; align-items: center; }
    .step-arrow { transform: rotate(90deg); margin: 0; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .download-content { grid-template-columns: 1fr; text-align: center; }
    .footer-content { grid-template-columns: 1fr 1fr; }
    .advantage-row { grid-template-columns: 1fr; gap: 8px; }
    .advantage-vs { flex-direction: column; gap: 8px; }
}