:root{--color-bg: #ffffff;--color-bg-alt: #f7f8fb;--color-text: #1a1d29;--color-text-muted: #5b6072;--color-primary: #1e3a8a;--color-primary-dark: #172d69;--color-border: #e5e7ef;--radius: 14px;--max-width: 1080px;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);--shadow-md: 0 8px 24px rgba(16, 24, 40, .08)}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:PingFang SC,Microsoft YaHei,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}a{color:inherit;text-decoration:none}.nav{position:sticky;top:0;z-index:20;background:#ffffffd9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--color-border)}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px}.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--color-primary);display:inline-block}.nav-links{display:flex;gap:32px;font-size:14px;color:var(--color-text-muted)}.nav-links a:hover{color:var(--color-primary)}.nav-cta{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.btn:active{transform:scale(.97)}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--color-primary-dark)}.btn-ghost{background:transparent;color:var(--color-text);border-color:var(--color-border)}.btn-ghost:hover{border-color:var(--color-primary);color:var(--color-primary)}.btn-small{padding:8px 18px;font-size:14px}.btn-block{width:100%}.hero{padding:96px 0 88px;background:radial-gradient(circle at 20% 20%,#e6ecfb 0%,var(--color-bg) 55%)}.hero-inner{max-width:760px;text-align:center;margin:0 auto}.hero-title{font-size:44px;line-height:1.25;font-weight:800;margin:0 0 20px;letter-spacing:-.5px}.hero-subtitle{font-size:17px;color:var(--color-text-muted);margin:0 0 36px}.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.section-title{font-size:30px;font-weight:800;text-align:center;margin:0 0 12px}.section-subtitle{text-align:center;color:var(--color-text-muted);font-size:15px;margin:0 0 48px}.features{padding:88px 0;background:var(--color-bg-alt)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:#fff;border:1px solid var(--color-border);border-radius:var(--radius);padding:32px 28px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.feature-icon{font-size:14px;font-weight:700;color:var(--color-primary);background:#e6ecfb;width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}.feature-card h3{font-size:18px;margin:0 0 10px}.feature-card p{font-size:14px;color:var(--color-text-muted);margin:0}.contact{padding:88px 0}.contact-inner{max-width:620px}.contact-copy .section-title,.contact-copy .section-subtitle{text-align:center}.contact-form{background:var(--color-bg-alt);border:1px solid var(--color-border);border-radius:var(--radius);padding:32px;display:flex;flex-direction:column;gap:18px}.form-row{display:flex;flex-direction:column;gap:8px}.form-row label{font-size:14px;font-weight:600;color:var(--color-text)}.form-row input{padding:12px 14px;border-radius:10px;border:1px solid var(--color-border);font-size:15px;background:#fff;outline:none;transition:border-color .15s ease}.form-row input:focus{border-color:var(--color-primary)}.form-note{min-height:20px;text-align:center;font-size:14px;margin:0}.form-note.success{color:#16a34a}.form-note.error{color:#dc2626}.footer{border-top:1px solid var(--color-border);padding:28px 0}.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--color-text-muted)}@media(max-width:860px){.feature-grid{grid-template-columns:1fr}.hero-title{font-size:32px}.hero{padding:64px 0 56px}.features,.contact{padding:56px 0}}@media(max-width:640px){.nav-links{display:none}.nav-cta{display:inline-flex}.hero-title{font-size:26px}.hero-subtitle{font-size:15px}.hero-actions{flex-direction:column;width:100%}.hero-actions .btn{width:100%}.footer-inner{flex-direction:column;text-align:center}}