:root {
    --brand-gradient: linear-gradient(45deg, #FFB686, #FF8A96, #E45E9D, #B749B2);
    --bg-color: #FFF9F7;
    --text-dark: #332222;
    --text-gray: #776666;
    --card-bg: #FFFFFF;
    --btn-hover: #E45E9D;
}
* { margin: 0; padding: 0; box-sizing: border-box; font-family: "PingFang SC", "Microsoft YaHei", sans-serif; }
body { background: var(--bg-color); color: var(--text-dark); line-height: 1.7; }
a { text-decoration: none; color: inherit; }

/* Nav */
.nav { position: sticky; top: 0; background: rgba(255,255,255,0.85); backdrop-filter: blur(12px); border-bottom: 1px solid #F3EAE8; display: flex; justify-content: space-between; padding: 18px 5%; z-index: 100; }
.nav-brand { font-size: 26px; font-weight: 900; background: var(--brand-gradient); -webkit-background-clip: text; color: transparent; }
.nav-links a { margin-left: 25px; font-weight: 600; color: var(--text-dark); transition: 0.3s; }
.nav-links a:hover { color: var(--btn-hover); }

/* Hero */
.hero { text-align: center; padding: 100px 20px 80px; background: url('data:image/svg+xml;utf8,<svg opacity="0.03" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="%23E45E9D"/></svg>') center/cover; }
.hero h1 { font-size: 52px; font-weight: 800; margin-bottom: 20px; color: var(--text-dark); }
.hero p { font-size: 18px; color: var(--text-gray); max-width: 650px; margin: 0 auto 40px; }
.btn-group { display: flex; gap: 20px; justify-content: center; }
.btn { padding: 15px 35px; border-radius: 30px; font-weight: bold; font-size: 16px; transition: all 0.3s; }
.btn-primary { background: var(--brand-gradient); color: white; box-shadow: 0 8px 20px rgba(228,94,157,0.3); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 25px rgba(228,94,157,0.4); }
.btn-secondary { background: white; color: var(--btn-hover); border: 2px solid #F3EAE8; }
.btn-secondary:hover { border-color: var(--btn-hover); transform: translateY(-3px); }

/* Data Bar */
.data-bar { display: flex; justify-content: center; gap: 50px; flex-wrap: wrap; padding: 50px 20px; background: white; box-shadow: 0 5px 20px rgba(0,0,0,0.02); margin: 0 5%; border-radius: 20px; transform: translateY(-30px); }
.data-item { text-align: center; }
.data-item h3 { font-size: 36px; font-weight: 900; color: var(--btn-hover); margin-bottom: 5px; }
.data-item p { font-size: 15px; color: var(--text-gray); font-weight: 600; }

/* Common */
.container { max-width: 1200px; margin: 0 auto; padding: 60px 20px; }
.section-title { text-align: center; font-size: 36px; margin-bottom: 50px; font-weight: 800; }
.img-fluid { max-width: 100%; border-radius: 24px; box-shadow: 0 15px 40px rgba(0,0,0,0.06); margin-top: 30px; }

/* Grid */
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.card { background: var(--card-bg); padding: 35px; border-radius: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.03); transition: 0.3s; }
.card:hover { transform: translateY(-8px); box-shadow: 0 15px 35px rgba(228,94,157,0.1); }
.card h3 { font-size: 22px; margin-bottom: 12px; color: var(--text-dark); display: flex; align-items: center; gap: 10px; }
.card h3::before { content: ""; display: block; width: 12px; height: 12px; border-radius: 50%; background: var(--brand-gradient); }
.card p { color: var(--text-gray); font-size: 15px; }

/* FAQ & Guide */
.faq-item { background: white; padding: 25px; border-radius: 15px; margin-bottom: 20px; border: 1px solid #F3EAE8; }
.faq-item h3 { font-size: 18px; margin-bottom: 10px; color: var(--btn-hover); }
.guide-step { text-align: center; padding: 30px 20px; background: white; border-radius: 20px; border: 1px solid #F3EAE8; }
.guide-step .num { width: 50px; height: 50px; background: var(--brand-gradient); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: bold; margin: 0 auto 20px; }

/* Footer */
.footer { text-align: center; padding: 50px 20px; background: white; margin-top: 50px; }
.footer-links { margin-bottom: 20px; display: flex; justify-content: center; gap: 30px; }
.footer-links a { color: var(--text-gray); font-weight: 600; }
.footer p { color: #AAA; font-size: 14px; }