:root{--navy:#11243a;--navy2:#1b3452;--cyan:#61c5df;--paper:#f6fbff;--line:#d7e4ef;--ink:#243648;--muted:#66798c;--soft:#ebf6ff;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.8}img{display:block;max-width:100%;height:auto}a{color:inherit}.shell{width:min(1180px,calc(100% - 40px));margin:auto}
.skip{position:fixed;top:-60px;left:12px;background:#fff;padding:10px;z-index:999}.skip:focus{top:12px}
.header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}
.head-grid{min-height:72px;display:grid;grid-template-columns:180px 1fr auto;gap:24px;align-items:center}.brand{display:inline-flex;padding:6px 8px;background:#fff;border:1px solid var(--line)}.brand img{height:32px;max-width:155px;width:auto;object-fit:contain}
.head-grid nav{display:flex;justify-content:center;gap:22px}.head-grid nav a{text-decoration:none;color:#587086;font-size:13px}.head-cta{display:inline-flex;align-items:center;justify-content:center;min-width:128px;min-height:44px;border-radius:999px;background:var(--navy);color:#fff;text-decoration:none;font-weight:900}
.hero{padding:84px 0;background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow,.section-head>span,.steps-copy>span,.files-copy>span,.faq-grid>div>span{display:block;font-size:10px;letter-spacing:.15em;font-weight:900;color:#bfeeff}
.hero h1,.section-head h2,.steps-copy h2,.files-copy h2,.faq-grid h2,.final h2{margin:0;font-size:clamp(34px,4.8vw,66px);line-height:1;letter-spacing:-.04em}.hero em{font-style:normal;color:#bfeeff}
.hero p,.steps-copy p{color:#d7e8f7}.hero-actions,.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.primary,.ghost,.steps-copy>a,.cta-row a,.final a{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 22px;border-radius:999px;text-decoration:none;font-weight:900}
.primary,.steps-copy>a,.final a{background:var(--cyan);color:#143144}.ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.28)}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.hero-tags span{padding:8px 12px;border:1px solid rgba(255,255,255,.2);border-radius:999px;color:#e7f8ff;font-size:13px}
.hero-stack{position:relative;min-height:430px}.shot{position:absolute;margin:0;padding:18px;background:#fff;border-radius:28px;box-shadow:0 18px 40px rgba(0,0,0,.18)}.shot img{max-height:330px;width:auto;object-fit:contain}.shot.a{left:0;top:22px;transform:rotate(-6deg)}.shot.b{right:8px;bottom:0;transform:rotate(5deg)}
.cards,.files,.faq{padding:86px 0}.section-head{display:grid;grid-template-columns:190px 1fr;gap:24px;margin-bottom:28px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card-grid article{padding:26px;background:#fff;border:1px solid var(--line);border-radius:22px}.card-grid small{color:#447d9f;font-weight:900}.card-grid h3{margin:22px 0 0;font-size:24px}.card-grid p{color:var(--muted)}.card-grid a{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:999px;background:var(--navy);color:#fff;text-decoration:none;font-weight:900;margin-top:12px}
.steps{display:grid;grid-template-columns:1fr 1fr;background:var(--soft)}.steps-visual,.steps-copy{padding:78px 6vw}.steps-visual{margin:0}.frame-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:10px;letter-spacing:.14em;color:#587ba0}.frame-top b{font-size:20px;color:#2e7daa}.steps-visual img,.files-visual img{border-radius:24px;background:#fff;max-height:430px;width:auto;margin:auto;object-fit:contain}
.steps-copy ol{list-style:none;margin:24px 0 0;padding:0;border-top:1px solid #d2e4f2}.steps-copy li{display:grid;grid-template-columns:34px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid #d2e4f2}.steps-copy li b{color:#2f7ca8}.steps-copy li p{margin:4px 0 0;color:var(--muted)}
.files-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.files-copy p{color:var(--muted)}.file-points{margin-top:24px;border-top:1px solid var(--line)}.file-points>div{display:grid;grid-template-columns:42px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}.file-points b{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:#e7f8ff;color:#2879a7}.file-points p{margin:4px 0 0;color:var(--muted)}.files-visual{margin:0;padding:18px;background:#fff;border:1px solid var(--line);border-radius:24px}
.fast-links{padding:0 0 74px}.fast-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.fast-grid a{min-height:120px;display:grid;grid-template-columns:74px 1fr auto;gap:12px;align-items:center;padding:18px 20px;background:#fff;border:1px solid var(--line);border-radius:18px;text-decoration:none}.fast-grid small{color:#2f7ca8;font-weight:900}.fast-grid strong{font-size:18px}.fast-grid span{color:#587086;font-weight:900}
.faq-grid{display:grid;grid-template-columns:.58fr 1.42fr;gap:60px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;list-style:none;padding:20px 2px;font-size:18px;font-weight:900}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";float:right;color:#2f7ca8}.faq-list details[open] summary:after{content:"−"}.faq-list p{margin:-3px 0 22px;padding:0 2px;color:var(--muted)}
.final{padding:56px 0;background:var(--navy);color:#fff}.final-grid{display:grid;grid-template-columns:120px 1fr auto;gap:28px;align-items:center}.final-grid>span{font-size:10px;letter-spacing:.14em;font-weight:900;color:#bee9ff}.final p{margin:6px 0 0;color:#dcedfa}
.footer{padding:50px 0 86px;background:#0e1723;color:#dfedf8}.foot-grid{display:grid;grid-template-columns:1fr auto;gap:36px}.foot-grid img{height:31px;max-width:155px;width:auto;object-fit:contain;padding:6px 8px;background:#0a1119}.foot-grid p{color:#9db1c5;font-size:13px}.foot-grid nav{display:flex;gap:18px;flex-wrap:wrap}.foot-grid nav a{text-decoration:none;color:#dfedf8;font-size:14px}
.mobile-bar{display:none}
@media(max-width:900px){.head-grid{grid-template-columns:1fr auto}.head-grid nav{display:none}.hero-grid,.steps,.files-grid,.faq-grid{grid-template-columns:1fr}.section-head{grid-template-columns:1fr}.card-grid,.fast-grid{grid-template-columns:1fr 1fr}.final-grid{grid-template-columns:1fr}.final a{width:100%}.hero-stack{min-height:360px}}
@media(max-width:600px){body{font-size:15px;padding-bottom:60px}.shell{width:min(100% - 28px,1180px)}.head-grid{min-height:64px}.brand img{height:28px}.head-cta{font-size:12px;padding:8px 12px}.hero{padding:56px 0}.hero-actions,.cta-row{flex-direction:column}.primary,.ghost,.steps-copy>a,.cta-row a,.final a{width:100%}.shot{position:relative;left:auto;right:auto;top:auto;bottom:auto;transform:none;margin-bottom:14px}.hero-stack{min-height:0}.cards,.files,.faq{padding:62px 0}.steps-visual,.steps-copy{padding:56px 22px}.card-grid,.fast-grid{grid-template-columns:1fr}.mobile-bar{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;background:rgba(14,23,35,.96);color:#fff;z-index:80}.mobile-bar a{display:inline-flex;align-items:center;justify-content:center;min-width:100px;min-height:42px;padding:0 14px;border-radius:999px;background:var(--cyan);color:#153144;text-decoration:none;font-weight:900}}