:root{color-scheme:light;--ink:#24343e;--muted:#576773;--blue:#244f68;--line:#dce3e6;--soft:#f2f6f7}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.85;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:3px solid #377faa;outline-offset:6px;border-radius:2px}
button,a{-webkit-tap-highlight-color:transparent}
p,h1,h2,h3{margin:0}
.container{width:min(1080px,calc(100% - 64px));margin-inline:auto}
.site-header{border-bottom:1px solid var(--line);background:#fff}
.header-inner{min-height:94px;display:flex;justify-content:space-between;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;font-size:19px;font-weight:600;line-height:1.5;letter-spacing:.03em}
.brand-sub{display:block;font-size:11px;font-weight:400;letter-spacing:.06em;color:var(--muted);margin-top:3px}
.brand-icon{width:43px;height:43px;display:grid;place-items:center;background:var(--blue);border-radius:8px;flex-shrink:0}
.brand-icon svg{width:29px;stroke:#fff;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
nav{display:flex;gap:32px;font-size:14px;color:var(--muted)}
nav a:hover{color:var(--blue);text-decoration:underline;text-underline-offset:6px}
.hero{background:var(--soft);border-bottom:1px solid var(--line)}
.hero-inner{display:grid;grid-template-columns:1.2fr 1fr;gap:36px;align-items:center;padding-block:68px 64px}
.eyebrow{display:flex;gap:9px;align-items:center;font-size:13px;color:var(--blue);letter-spacing:.08em;margin-bottom:22px}
.eyebrow span{width:6px;height:6px;border-radius:50%;background:var(--blue)}
h1{font-size:clamp(30px,3.2vw,42px);font-weight:600;line-height:1.55;letter-spacing:.025em}
.hero-description{margin-top:20px;color:var(--muted);line-height:1.95;font-size:14px}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:36px;padding:11px 20px;background:var(--blue);color:#fff;font-size:14px;border-radius:4px;margin-top:27px;transition:background .15s}
.button:hover{background:#183c51}
.button span{font-size:19px;line-height:1}
.hero-visual{padding:4px 0 0 16px}
.hero-visual svg{display:block;width:100%;height:auto}
.hero-visual p{text-align:center;font-size:12px;letter-spacing:.1em;color:#5b7280;margin-top:2px}
.section{padding-block:64px}
.section-label{color:var(--blue);font-size:12px;letter-spacing:.13em;margin-bottom:8px}
h2{font-size:26px;font-weight:600;line-height:1.55;letter-spacing:.025em}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:30px}
.section-heading>p{color:var(--muted);font-size:13px;padding-bottom:3px}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.guide-item{border-top:1px solid var(--line);padding-top:22px}
.item-number{font-size:12px;color:#607783;font-variant-numeric:tabular-nums}
h3{font-size:17px;font-weight:600;line-height:1.6}
.guide-item h3{margin-top:10px;margin-bottom:10px}
.guide-item p,.checklist p{color:var(--muted);font-size:14px;line-height:1.95}
.preparation{background:#f7f8f8;border-top:1px solid #e7ebed;border-bottom:1px solid #e7ebed}
.preparation-inner{padding-block:48px;display:grid;grid-template-columns:1fr 1.9fr;gap:70px}
.preparation-intro>p:last-child{font-size:14px;color:var(--muted);margin-top:16px}
.checklist{padding:0;margin:0;list-style:none}
.checklist li{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.checklist li:first-child{padding-top:0}
.checklist li:last-child{border-bottom:0;padding-bottom:0}
.step{width:26px;height:26px;flex-shrink:0;border:1px solid #c6d2d8;border-radius:50%;display:grid;place-items:center;color:var(--blue);font-size:12px;margin-top:2px}
.checklist h3{font-size:15px;margin-bottom:5px}
.about{display:grid;grid-template-columns:1.15fr 1fr;gap:80px}
.about-description{margin-top:16px;color:var(--muted);font-size:14px}
.site-note{margin-top:13px;font-size:12px;color:var(--muted)}
.site-details{margin:22px 0 0;font-size:13px}
.site-details>div{display:grid;grid-template-columns:82px 1fr;gap:14px;padding:15px 0;border-bottom:1px solid var(--line)}
dt{color:var(--muted)}
dd{margin:0;overflow-wrap:anywhere}
.site-footer{border-top:1px solid var(--line);background:#fafbfb;color:var(--muted);font-size:12px}
.footer-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:14px;padding-block:25px}
.site-footer a{text-decoration:underline;text-underline-offset:4px}
.site-footer a:hover{color:var(--blue)}
.skip-link{position:absolute;top:8px;left:16px;z-index:10;padding:8px 16px;background:#fff;transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1440px){.hero-inner{padding-block:78px}}
@media(max-width:800px){.container{width:calc(100% - 40px)}.header-inner{gap:20px}nav{gap:18px;font-size:13px}.brand{font-size:17px}.hero-inner{gap:10px;padding-block:48px}.hero-visual{padding-left:0}.desktop-break{display:none}.guide-grid{gap:22px}.preparation-inner{gap:32px;grid-template-columns:1fr 1.7fr}.about{gap:32px}.section-heading{align-items:flex-start;flex-direction:column;gap:10px}}
@media(max-width:600px){.header-inner{min-height:0;padding-block:18px 14px;flex-direction:column;align-items:flex-start;gap:18px}.brand{font-size:18px}.brand-sub{font-size:11px}nav{width:100%;justify-content:space-between;gap:12px;border-top:1px solid #edf0f2;padding-top:12px}nav a{padding-block:3px}.hero-inner{grid-template-columns:1fr;padding-block:38px 30px;gap:8px}h1{font-size:31px}.eyebrow{margin-bottom:16px}.hero-description{margin-top:16px}.hero-visual{max-width:310px;width:100%;margin:12px auto 0}.hero-visual p{font-size:11px}.section{padding-block:40px}h2{font-size:24px}.section-heading{margin-bottom:22px}.guide-grid{grid-template-columns:1fr;gap:24px}.guide-item{padding-top:16px}.guide-item h3{margin-top:5px;margin-bottom:7px}.preparation-inner{grid-template-columns:1fr;padding-block:36px;gap:26px}.preparation-intro h2 br{display:none}.preparation-intro>p:last-child{margin-top:10px}.preparation-intro>p:last-child br{display:none}.checklist li{gap:14px}.about{grid-template-columns:1fr;gap:20px}.site-details{margin:0}.footer-inner{flex-direction:column;align-items:flex-start;gap:8px;padding-block:22px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}