:root{--brand: #25d366;--brand-dark: #1da851;--ink: #0f172a;--muted: #5b6678;--line: #e7eaf0;--bg: #ffffff;--bg-soft: #f6f8fb;--radius: 14px;--max: 1120px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}img{max-width:100%}a{color:inherit;text-decoration:none}.container{max-width:var(--max);margin:0 auto;padding:0 20px}section{padding:72px 0}section[id]{scroll-margin-top:84px}.section-soft{background:var(--bg-soft)}.kicker{display:inline-block;color:var(--brand-dark);font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;margin-bottom:10px}.section-title{font-size:clamp(26px,3.4vw,36px);line-height:1.2;margin:0 0 12px;letter-spacing:-.01em}.section-sub{color:var(--muted);margin:0 0 36px;font-size:16px}.center{text-align:center}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:12px 22px;border-radius:10px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,background .15s ease,box-shadow .15s ease}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px)}.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}.btn-ghost:hover{border-color:var(--brand);color:var(--brand-dark)}.btn-sm{padding:8px 14px;font-size:14px}.nav{position:sticky;top:0;z-index:50;background:#ffffffe6;backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;gap:24px;height:64px}.brand-logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:19px}.brand-dot{width:26px;height:26px;border-radius:8px;background:var(--brand);display:inline-block;position:relative}.brand-dot:after{content:"";position:absolute;inset:7px;border:2px solid #fff;border-radius:50%}.nav-links{display:flex;gap:22px;margin-left:8px}.nav-links a{color:var(--muted);font-size:15px;font-weight:500}.nav-links a:hover{color:var(--ink)}.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}.lang-switch{font-size:14px;color:var(--muted);font-weight:600}.lang-switch:hover{color:var(--brand-dark)}.nav-toggle{display:none;background:none;border:0;font-size:24px;cursor:pointer;margin-left:auto}.hero{padding:88px 0 72px;text-align:center;background:linear-gradient(180deg,#f3fbf6,#fff)}.hero-badge{display:inline-block;background:#e7f8ee;color:var(--brand-dark);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:600;margin-bottom:22px}.hero h1{font-size:clamp(32px,5.2vw,54px);line-height:1.12;letter-spacing:-.02em;margin:0 auto 20px;max-width:820px}.hero .accent{color:var(--brand-dark)}.hero p.sub{font-size:clamp(16px,2vw,19px);color:var(--muted);max-width:680px;margin:0 auto 32px}.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.hero-note{margin-top:16px;color:var(--muted);font-size:14px}.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.compare-card{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff}.compare-card.good{border-color:var(--brand);box-shadow:0 12px 30px #25d3661f}.compare-card h3{margin:0 0 16px;font-size:19px}.compare-card ul{margin:0;padding:0;list-style:none}.compare-card li{padding:8px 0 8px 28px;position:relative;color:var(--muted)}.compare-card li:before{position:absolute;left:0;font-weight:700}.compare-card.bad li:before{content:"✕";color:#ef4444}.compare-card.good li:before{content:"✓";color:var(--brand-dark)}.compare-note{margin-top:14px;font-size:13px;color:var(--muted)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#fff}.card h3{margin:0 0 10px;font-size:18px}.card p{margin:0;color:var(--muted);font-size:15px}.card .icon{width:42px;height:42px;border-radius:10px;background:#e7f8ee;display:flex;align-items:center;justify-content:center;font-size:20px;margin-bottom:14px}.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}.flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}.flow-step .num{width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;margin-bottom:12px}.flow-step h3{margin:0 0 6px;font-size:17px}.flow-step p{margin:0;color:var(--muted);font-size:14px}.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}.plan{border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;background:#fff;display:flex;flex-direction:column}.plan.popular{border-color:var(--brand);box-shadow:0 16px 40px #25d36629;position:relative}.popular-tag{position:absolute;top:-13px;left:50%;transform:translate(-50%);background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px}.plan h3{margin:0 0 4px;font-size:20px}.plan .desc{color:var(--muted);font-size:14px;margin:0 0 18px}.price{font-size:38px;font-weight:800;letter-spacing:-.02em}.price .per{font-size:15px;font-weight:500;color:var(--muted)}.plan ul{list-style:none;padding:0;margin:20px 0 24px;flex:1}.plan li{padding:7px 0 7px 26px;position:relative;font-size:15px;color:var(--ink)}.plan li:before{content:"✓";position:absolute;left:0;color:var(--brand-dark);font-weight:700}.faq-list{max-width:760px;margin:0 auto;text-align:left}details.faq-item{border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:12px;background:#fff}details.faq-item summary{font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:28px}details.faq-item summary::-webkit-details-marker{display:none}details.faq-item summary:after{content:"+";position:absolute;right:0;top:0;font-size:20px;color:var(--brand-dark)}details.faq-item[open] summary:after{content:"−"}details.faq-item p{margin:12px 0 0;color:var(--muted)}.final-cta{text-align:center;background:linear-gradient(135deg,#0f172a,#133b27);color:#fff;border-radius:20px;padding:60px 28px}.final-cta h2{font-size:clamp(26px,3.6vw,38px);margin:0 0 12px}.final-cta p{color:#fffc;margin:0 0 28px}.footer{border-top:1px solid var(--line);padding:44px 0;background:var(--bg-soft)}.footer-inner{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}.footer .tagline{color:var(--muted);max-width:320px;font-size:14px}.footer h4{margin:0 0 12px;font-size:14px}.footer .col a{display:block;color:var(--muted);font-size:14px;padding:4px 0}.footer .col a:hover{color:var(--brand-dark)}.copyright{margin-top:32px;color:var(--muted);font-size:13px}.legal-wrap{max-width:780px;margin:40px auto}.legal-wrap h1{font-size:32px}.legal-wrap .updated{color:var(--muted);font-size:14px}.legal-wrap h2{font-size:20px;margin:28px 0 8px}.legal-wrap p{color:#334155}.legal-back{display:inline-block;margin-bottom:24px;color:var(--brand-dark);font-weight:600}@media(max-width:900px){.grid-4,.flow{grid-template-columns:repeat(2,1fr)}.grid-3,.pricing-grid,.compare-grid{grid-template-columns:1fr}.nav-links{display:none}.nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 20px;border-bottom:1px solid var(--line)}.nav-toggle{display:block}.nav-actions .login-link{display:none}}@media(max-width:560px){.grid-4,.flow{grid-template-columns:1fr}section{padding:52px 0}}