:root{--brand-orange: #F7AA21;--brand-teal: #1EC9A8;--brand-dark: #1a1a1a;--text-primary: #222222;--text-secondary: #666666;--text-muted: #999999;--bg-white: #ffffff;--bg-light: #f8f8f8;--bg-section: #f4f4f4;--max-width: 1200px;--radius: 12px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;color:var(--text-primary);background:var(--bg-white);line-height:1.6;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}ul{list-style:none}.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}.section{padding:80px 0}.section-alt{background:var(--bg-light)}.section-title{font-size:2rem;font-weight:700;text-align:center;margin-bottom:12px;color:var(--text-primary)}.section-subtitle{font-size:1.05rem;color:var(--text-secondary);text-align:center;margin-bottom:56px}.nav{position:sticky;top:0;z-index:100;background:#fffffff2;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid #eee}.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.nav-logo{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:700;color:var(--text-primary)}.nav-logo img{width:36px;height:36px;object-fit:contain}.nav-links{display:flex;align-items:center;gap:32px}.nav-links a{font-size:.95rem;color:var(--text-secondary);transition:color .2s}.nav-links a:hover{color:var(--text-primary)}.btn-nav{background:var(--brand-orange);color:#fff!important;font-weight:600;padding:8px 20px;border-radius:20px;font-size:.9rem!important;transition:opacity .2s!important}.btn-nav:hover{opacity:.88}.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none}.nav-toggle span{display:block;width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:all .3s}.hero{padding:80px 0 72px;background:linear-gradient(135deg,#fffdf5,#f0fdf9)}.hero-inner{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}.hero-tag{display:inline-block;background:#fff3d6;color:#b37800;font-size:.8rem;font-weight:600;padding:4px 12px;border-radius:12px;margin-bottom:20px}.hero h1{font-size:2.6rem;font-weight:800;line-height:1.25;margin-bottom:20px;color:var(--text-primary)}.hero h1 em{font-style:normal;color:var(--brand-orange)}.hero-desc{font-size:1.05rem;color:var(--text-secondary);margin-bottom:36px;line-height:1.8}.hero-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap}.btn-primary{background:var(--brand-orange);color:#fff;font-weight:700;font-size:1rem;padding:14px 28px;border-radius:28px;display:inline-flex;align-items:center;gap:8px;transition:opacity .2s,transform .2s;cursor:pointer}.btn-primary:hover{opacity:.9;transform:translateY(-1px)}.btn-secondary{color:var(--text-secondary);font-size:.95rem;padding:14px 4px;display:inline-flex;align-items:center;gap:6px;border-bottom:1px solid transparent;transition:color .2s,border-color .2s}.btn-secondary:hover{color:var(--brand-teal);border-color:var(--brand-teal)}.hero-qr{display:flex;flex-direction:column;align-items:center;gap:20px}.qr-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:0 4px 24px #00000014;text-align:center;max-width:260px;width:100%}.qr-card img{width:180px;height:180px;object-fit:contain;margin:0 auto 16px}.qr-label{font-size:.9rem;color:var(--text-secondary);line-height:1.5}.qr-label strong{color:var(--text-primary);display:block;margin-bottom:4px}.hero-badges{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}.badge{background:#f0fdf9;color:#0a8a72;font-size:.82rem;font-weight:600;padding:5px 12px;border-radius:12px;border:1px solid #b8f0e4}.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative}.steps:before{content:"";position:absolute;top:32px;left:10%;right:10%;height:2px;background:linear-gradient(90deg,var(--brand-orange),var(--brand-teal));z-index:0}.step{display:flex;flex-direction:column;align-items:center;text-align:center;padding:0 12px;position:relative;z-index:1}.step-icon{width:64px;height:64px;border-radius:50%;background:#fff;border:3px solid var(--brand-orange);display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:16px;box-shadow:0 2px 12px #f7aa2126}.step:nth-child(2n) .step-icon{border-color:var(--brand-teal);box-shadow:0 2px 12px #1ec9a826}.step-title{font-size:.95rem;font-weight:700;margin-bottom:6px;color:var(--text-primary)}.step-desc{font-size:.82rem;color:var(--text-secondary);line-height:1.5}.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.service-card{background:#fff;border-radius:var(--radius);padding:28px 24px;border:1px solid #eee;transition:box-shadow .2s,transform .2s}.service-card:hover{box-shadow:0 4px 20px #00000014;transform:translateY(-2px)}.service-icon{font-size:2rem;margin-bottom:14px}.service-title{font-size:1rem;font-weight:700;margin-bottom:8px}.service-desc{font-size:.88rem;color:var(--text-secondary);line-height:1.6}.guarantees-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.guarantee-card{background:#fff;border-radius:var(--radius);padding:24px;display:flex;gap:16px;align-items:flex-start;border:1px solid #eee}.guarantee-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#fff3d6,#ffe08a);display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0}.guarantee-content h3{font-size:.95rem;font-weight:700;margin-bottom:6px}.guarantee-content p{font-size:.85rem;color:var(--text-secondary);line-height:1.6}.file-security-summary{background:linear-gradient(135deg,#f0fdf9,#e6fff9);border-radius:var(--radius);padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}.file-security-points{display:flex;flex-direction:column;gap:16px}.security-point{display:flex;align-items:flex-start;gap:12px}.security-check{width:24px;height:24px;border-radius:50%;background:var(--brand-teal);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.75rem;flex-shrink:0;margin-top:2px}.security-point p{font-size:.9rem;color:var(--text-secondary);line-height:1.6}.security-point p strong{color:var(--text-primary)}.file-security-cta{text-align:center}.file-security-cta h3{font-size:1.2rem;font-weight:700;margin-bottom:8px}.file-security-cta p{font-size:.9rem;color:var(--text-secondary);margin-bottom:20px}.btn-outline{display:inline-block;border:2px solid var(--brand-teal);color:var(--brand-teal);font-weight:600;padding:10px 24px;border-radius:20px;font-size:.9rem;transition:all .2s}.btn-outline:hover{background:var(--brand-teal);color:#fff}.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}.faq-item{background:#fff;border-radius:var(--radius);border:1px solid #eee;overflow:hidden}.faq-q{width:100%;text-align:left;padding:18px 24px;font-size:.95rem;font-weight:600;color:var(--text-primary);background:none;border:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:color .2s}.faq-q:hover{color:var(--brand-orange)}.faq-q .arrow{font-size:.8rem;color:var(--text-muted);transition:transform .3s;flex-shrink:0}.faq-item.open .faq-q .arrow{transform:rotate(180deg)}.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}.faq-item.open .faq-a{max-height:300px}.faq-a p{padding:0 24px 18px;font-size:.9rem;color:var(--text-secondary);line-height:1.7}.cta{background:linear-gradient(135deg,#1a1a1a,#2d2d2d);color:#fff;text-align:center;padding:80px 0}.cta h2{font-size:2rem;font-weight:800;margin-bottom:12px}.cta p{font-size:1.05rem;color:#ffffffb3;margin-bottom:40px}.cta-qr{display:inline-flex;flex-direction:column;align-items:center;gap:12px}.cta-qr img{width:160px;height:160px;object-fit:contain;border-radius:12px;background:#fff;padding:8px}.cta-qr span{font-size:.9rem;color:#fff9}.footer{background:#111;color:#ffffff80;padding:40px 0 24px}.footer-inner{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}.footer-logo{display:flex;align-items:center;gap:8px;color:#fffc;font-weight:700;font-size:1rem}.footer-logo img{width:28px;height:28px;object-fit:contain}.footer-links{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}.footer-links a{font-size:.85rem;transition:color .2s}.footer-links a:hover{color:#fffc}.footer-divider{width:100%;height:1px;background:#ffffff1a}.footer-bottom{display:flex;flex-direction:column;align-items:center;gap:8px}.footer-bottom p{font-size:.82rem}.footer-icp a{color:#fff6;font-size:.82rem;transition:color .2s}.footer-icp a:hover{color:#ffffffb3}.footer-company{font-size:.82rem}.page-header{background:linear-gradient(135deg,#fffdf5,#f0fdf9);padding:64px 0 48px;text-align:center}.page-header h1{font-size:2rem;font-weight:800;margin-bottom:8px}.page-header p{color:var(--text-secondary);font-size:.9rem}.page-content{max-width:760px;margin:0 auto;padding:60px 24px 80px}.page-content h2{font-size:1.2rem;font-weight:700;margin:32px 0 12px}.page-content h3{font-size:1rem;font-weight:700;margin:24px 0 8px}.page-content p{font-size:.92rem;color:var(--text-secondary);line-height:1.8;margin-bottom:12px}.page-content ul{margin:8px 0 12px 20px}.page-content ul li{font-size:.92rem;color:var(--text-secondary);line-height:1.8;list-style:disc}.page-content .updated{font-size:.82rem;color:var(--text-muted);margin-bottom:32px}.not-found{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:40px 24px}.not-found h1{font-size:6rem;font-weight:900;color:var(--brand-orange);line-height:1;margin-bottom:16px}.not-found h2{font-size:1.4rem;font-weight:700;margin-bottom:12px}.not-found p{color:var(--text-secondary);margin-bottom:32px}@media (max-width: 900px){.services-grid,.guarantees-grid{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:1fr;gap:32px}.steps:before{display:none}.file-security-summary{grid-template-columns:1fr;padding:32px;gap:32px}}@media (max-width: 768px){.nav-links{display:none;flex-direction:column;gap:0;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid #eee;padding:16px 24px}.nav-links.open{display:flex}.nav-links a{padding:12px 0;border-bottom:1px solid #f0f0f0;font-size:1rem}.nav-links a:last-child{border:none}.nav-toggle{display:flex}.nav{position:relative}.hero{padding:48px 0}.hero-inner{grid-template-columns:1fr;gap:40px}.hero h1{font-size:1.8rem}.hero-qr{order:-1}.qr-card{max-width:220px;padding:20px}.qr-card img{width:140px;height:140px}.section{padding:56px 0}.section-title{font-size:1.6rem}.services-grid,.guarantees-grid{grid-template-columns:1fr}.cta h2{font-size:1.5rem}.footer-links{gap:16px}}@media (max-width: 480px){.container{padding:0 16px}.hero h1{font-size:1.5rem}.hero-actions{flex-direction:column;align-items:flex-start}}