:root{--ink:#151515;--muted:#666;--paper:#f6f7f9;--card:#fff;--line:#e7e9ed;--blue:#1268df;--red:#ed3d4f;--radius:22px;--shadow:0 16px 45px rgba(20,31,55,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.75}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,calc(100% - 36px));margin:auto}.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:66px}.brand{color:var(--ink);font-weight:800}.nav-links{display:flex;gap:22px;font-size:14px}.hero{padding:82px 0 58px;background:radial-gradient(circle at 80% 10%,#dbeaff 0,transparent 35%),linear-gradient(145deg,#fff 20%,#f2f6ff)}.eyebrow{color:var(--blue);font-weight:750;letter-spacing:.08em}.hero h1{font-size:clamp(38px,6vw,70px);line-height:1.1;margin:14px 0 22px;max-width:900px}.lead{max-width:780px;color:#4d5562;font-size:clamp(18px,2vw,22px)}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border-radius:999px;background:var(--ink);color:#fff;font-weight:700}.button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.button:hover{text-decoration:none;transform:translateY(-1px)}.notice{margin-top:18px;color:var(--muted);font-size:14px}.section{padding:64px 0}.section h2{font-size:clamp(28px,4vw,42px);line-height:1.25;margin:0 0 14px}.section-intro{color:var(--muted);max-width:760px;margin:0 0 28px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid.two{grid-template-columns:repeat(2,1fr)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}.card h3{margin:0 0 10px;font-size:21px}.card p{margin:0;color:var(--muted)}.tag{display:inline-block;margin-bottom:12px;padding:3px 10px;border-radius:999px;background:#eaf2ff;color:#155fbf;font-size:13px;font-weight:700}.price{font-size:28px;font-weight:800;margin:8px 0}.steps{counter-reset:step}.step{position:relative;padding-left:54px}.step:before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--ink);color:#fff;font-weight:800}.faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 20px;margin:12px 0}.faq summary{cursor:pointer;font-weight:750}.faq p{color:var(--muted);margin:10px 0 0}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:18px}table{width:100%;border-collapse:collapse;min-width:680px}th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line)}th{background:#f7f9fc}.callout{background:#111;color:#fff;border-radius:28px;padding:36px}.callout p{color:#d4d7dd}.footer{padding:34px 0 48px;color:#6b7280;font-size:14px}.footer-row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:18px}.article{width:min(820px,calc(100% - 36px));margin:auto}.article h1{font-size:clamp(34px,5vw,54px);line-height:1.18}.article h2{margin-top:44px}.article li{margin:8px 0}.answer{border-left:4px solid var(--blue);padding:4px 0 4px 18px;font-size:18px}.danger{border-left-color:var(--red)}@media(max-width:800px){.nav-links{display:none}.grid,.grid.two{grid-template-columns:1fr}.hero{padding-top:58px}.section{padding:46px 0}.card{padding:22px}}