:root{--blue:#2563eb;--blue2:#1d4ed8;--cyan:#22d3ee;--navy:#071225;--ink:#0f172a;--text:#475569;--muted:#64748b;--line:#e2e8f0;--soft:#f8fafc;--r:18px;--max:1160px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:#fff}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}ul{list-style:none}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(15,23,42,.08)}.nav{height:70px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;font-weight:900;font-size:20px}.brand-mark{width:34px;height:34px;display:grid;place-items:center;margin-right:9px;border-radius:10px;color:#fff;background:linear-gradient(135deg,var(--cyan),var(--blue) 55%,#4f46e5);box-shadow:0 8px 20px rgba(37,99,235,.2)}.brand-cn{margin-left:7px;font-size:15px;color:#334155}.nav-links{display:flex;align-items:center;gap:24px;font-size:14px;font-weight:650}.nav-links a:hover{color:var(--blue)}.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:800}.nav-cta{padding:9px 17px;color:#fff;background:var(--blue)}.hero{color:#fff;background:radial-gradient(800px 400px at 18% 0,rgba(34,211,238,.15),transparent 65%),radial-gradient(800px 420px at 85% 0,rgba(37,99,235,.25),transparent 65%),linear-gradient(135deg,#071225,#0d1b38 60%,#071225)}.hero-grid{min-height:570px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:50px;padding:70px 0}.eyebrow{color:#93c5fd;font-size:13px;font-weight:850;letter-spacing:1px;margin-bottom:14px}.hero h1{font-size:46px;line-height:1.16;letter-spacing:-1px;margin-bottom:18px}.hero h1 em{font-style:normal;color:#60a5fa}.hero .lead{color:#cbd5e1;font-size:17px;max-width:58ch}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{padding:13px 22px;border:1px solid transparent}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue2)}.btn-light{border-color:#cbd5e1;color:#fff;background:rgba(255,255,255,.05)}.btn-outline{border-color:#bfdbfe;color:var(--blue);background:#fff}.hero-media{position:relative;border-radius:24px;overflow:hidden;border:1px solid rgba(148,163,184,.22);box-shadow:0 28px 70px rgba(2,6,23,.45)}.hero-media img{width:100%;height:390px;object-fit:cover}.media-label{position:absolute;right:14px;bottom:14px;padding:6px 10px;border-radius:999px;color:#fff;background:rgba(7,18,37,.78);font-size:11px;border:1px solid rgba(255,255,255,.2)}.section{padding:84px 0}.section-soft{background:var(--soft)}.section-dark{background:var(--navy);color:#fff}.section-head{max-width:760px;margin:0 auto 40px;text-align:center}.section-head.left{margin-left:0;text-align:left}.section-head h2{font-size:34px;line-height:1.25;margin-bottom:12px}.section-head p{color:var(--text);font-size:17px}.section-dark .section-head p{color:#94a3b8}.grid-2,.grid-3,.grid-4{display:grid;gap:20px}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.card{border:1px solid var(--line);border-radius:var(--r);padding:24px;background:#fff;box-shadow:0 8px 24px rgba(2,6,23,.05)}.card h3{font-size:19px;margin-bottom:8px}.card p{color:var(--text);font-size:14px}.card ul{display:grid;gap:8px;margin-top:15px;color:var(--text);font-size:13px}.card li:before{content:"✓";color:var(--blue);font-weight:900;margin-right:8px}.proof{border-left:3px solid var(--blue);padding-left:16px}.proof small{display:block;color:var(--muted);margin-top:8px}.spec-table{width:100%;border-collapse:collapse;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:#fff}.spec-table th,.spec-table td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}.spec-table th{width:30%;color:#334155;background:#f8fafc}.spec-table td{color:var(--text)}.steps{counter-reset:step}.step{position:relative;padding:24px 22px 24px 64px;border:1px solid var(--line);border-radius:var(--r);background:#fff}.step:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:23px;width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:var(--blue);color:#fff;font-weight:900}.faq{display:grid;gap:12px}.faq details{border:1px solid var(--line);border-radius:14px;padding:17px 19px;background:#fff}.faq summary{cursor:pointer;font-weight:800}.faq p{color:var(--text);font-size:14px;margin-top:10px}.cta-band{padding:36px;border-radius:24px;color:#fff;background:linear-gradient(135deg,var(--blue2),#3730a3);display:flex;align-items:center;justify-content:space-between;gap:24px}.cta-band h2{font-size:28px}.cta-band p{color:#dbeafe}.breadcrumbs{padding:18px 0;color:var(--muted);font-size:13px}.breadcrumbs a{color:var(--blue)}.case-photo{height:240px;border-radius:14px;overflow:hidden;margin-bottom:18px}.case-photo img{width:100%;height:100%;object-fit:cover}.source-note{padding:12px 14px;border-radius:12px;background:#eff6ff;color:#1e40af;font-size:12px;margin-top:15px}.form-card{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:28px;border:1px solid var(--line);border-radius:var(--r);background:#fff}.field{display:grid;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:12px;color:var(--muted)}.field input,.field select,.field textarea{width:100%;padding:12px;border:1px solid #cbd5e1;border-radius:11px;font:inherit;font-size:14px}.field textarea{min-height:90px}.form-card button[type=submit]{width:100%;min-height:58px;border-radius:16px;font-size:16px;letter-spacing:.2px;box-shadow:0 16px 30px rgba(37,99,235,.18)}.form-card button[type=submit]:hover{box-shadow:0 18px 34px rgba(29,78,216,.22)}.footer{padding:50px 0 24px;background:#050b16;color:#cbd5e1}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px}.footer h4{color:#fff;margin-bottom:12px}.footer p,.footer li{font-size:13px;color:#94a3b8}.footer ul{display:grid;gap:8px}.copyright{margin-top:36px;padding-top:20px;border-top:1px solid #1e293b;font-size:12px;color:#64748b}.article{max-width:820px;margin:auto}.article h2{font-size:28px;margin:42px 0 14px}.article h3{font-size:20px;margin:28px 0 10px}.article p{color:#334155;margin:12px 0}.article ul{list-style:disc;padding-left:22px;color:#334155}.article table{margin:20px 0}.article-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:12px;margin-top:16px}.mobile-menu{display:none}.kicker{display:inline-block;padding:4px 9px;border-radius:999px;color:#1d4ed8;background:#eff6ff;font-size:11px;font-weight:800;margin-bottom:10px}@media(max-width:900px){.nav-links{display:none}.mobile-menu{display:block}.hero-grid{grid-template-columns:1fr;padding:50px 0}.hero h1{font-size:38px}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:1fr 1fr}.hero-media img{height:340px}}@media(max-width:640px){.wrap{width:min(100% - 28px,var(--max))}.hero-grid{min-height:auto;gap:30px}.hero h1{font-size:32px}.hero-media img{height:240px}.section{padding:62px 0}.section-head h2{font-size:28px}.grid-2,.grid-3,.grid-4,.footer-grid,.form-card{grid-template-columns:1fr}.field.full{grid-column:auto}.cta-band{align-items:flex-start;flex-direction:column}.brand-cn{display:none}.case-photo{height:220px}.form-card button[type=submit]{min-height:56px;border-radius:14px;font-size:15px}}

.nav-links .nav-cta:hover,.nav-links .nav-cta:focus-visible,.nav-links .nav-cta:active,.nav-links .nav-cta[aria-current="page"]{color:#fff;background:var(--blue2)}
.site-header{position:fixed;width:100%;background:rgba(255,255,255,.88);z-index:1000;backdrop-filter:saturate(160%) blur(10px)}
body{padding-top:72px}
@media(min-width:901px){
  .site-header .nav{width:min(1200px,calc(100% - 40px));height:72px}
  .site-header .brand{font-size:24px;font-weight:800;letter-spacing:-.4px}
  .site-header .brand-mark{margin-right:10px;font-size:17px}
  .site-header .brand-cn{margin-left:8px;font-size:18px;letter-spacing:.2px;color:var(--ink)}
  .site-header .nav-links{gap:28px;font-size:14px;font-weight:500}
  .site-header .nav-links a{color:rgba(15,23,42,.86);transition:color .25s}
  .site-header .nav-links a:hover{color:var(--blue)}
  .site-header .nav-cta{padding:9px 18px;border-radius:10px;font-weight:700;color:#fff;background:var(--blue);transition:background .25s,transform .25s}
  .site-header .nav-links .nav-cta:hover,.site-header .nav-links .nav-cta:focus-visible,.site-header .nav-links .nav-cta:active,.site-header .nav-links .nav-cta[aria-current="page"]{color:#fff;background:var(--blue2);transform:translateY(-1px)}
}
.guide-cta-section{padding-top:56px;padding-bottom:64px}
.guide-cta{max-width:820px;padding:28px 30px;border:1px solid #dbeafe;border-radius:18px;color:var(--ink);background:#fff;box-shadow:0 14px 36px rgba(15,23,42,.06)}
.guide-cta h2{font-size:24px;line-height:1.35;color:var(--ink)}
.guide-cta p{margin-top:6px;color:var(--muted)}
.guide-cta .btn{min-width:150px;border-radius:14px;padding:13px 20px;box-shadow:0 12px 26px rgba(37,99,235,.16)}
.cta-band:not(.guide-cta){padding:30px 34px;border:1px solid #dbeafe;border-radius:18px;color:var(--ink);background:linear-gradient(180deg,#fff 0%,#f8fbff 100%);box-shadow:0 14px 36px rgba(15,23,42,.06)}
.cta-band:not(.guide-cta) h2{font-size:24px;line-height:1.35;color:var(--ink)}
.cta-band:not(.guide-cta) p{margin-top:6px;color:var(--muted)}
.cta-band:not(.guide-cta) .btn{min-width:142px;min-height:48px;border-radius:14px;padding:13px 20px}
.cta-band:not(.guide-cta) .btn-outline{border-color:transparent;color:#fff;background:var(--blue);box-shadow:0 12px 26px rgba(37,99,235,.16)}
.cta-band:not(.guide-cta) .btn-outline:hover{color:#fff;background:var(--blue2)}