:root{--ink:#122a25;--muted:#60716d;--paper:#f4f7f5;--white:#fff;--line:#d7e0dc;--lime:#d6f35a;--teal:#1d6f61;--soft:#e8f1ed}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 'DM Sans','PingFang SC','Microsoft YaHei',sans-serif}a{color:inherit}.guide-header{height:72px;padding:0 clamp(20px,6vw,90px);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#f9fbfa}.back{font-weight:700;text-decoration:none}.language-switcher{display:flex;border:1px solid var(--line)}.language-switcher button{border:0;border-right:1px solid var(--line);padding:8px;min-width:38px;background:transparent;font-weight:700;font-size:.7rem;cursor:pointer}.language-switcher button:last-child{border:0}.language-switcher button.active{background:var(--ink);color:#fff}.guide-main{max-width:1100px;margin:auto;padding:85px clamp(20px,6vw,80px) 110px}.kicker{color:var(--teal);font-size:.72rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase}.status{display:inline-block;margin-left:10px;background:var(--soft);padding:5px 8px;color:var(--teal);letter-spacing:0;font-weight:700}h1,h2,h3{font-family:Manrope,sans-serif;line-height:1.08;letter-spacing:-.04em}h1{font-size:clamp(3rem,7vw,6.8rem);max-width:950px;margin:20px 0 28px}h2{font-size:clamp(2rem,4vw,3.8rem);margin:0 0 18px}h3{font-size:1.25rem}.lead{font-size:1.15rem;color:var(--muted);max-width:760px}.notice{margin:45px 0;padding:22px;border-left:4px solid var(--lime);background:var(--white)}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin:55px 0}.guide-card{background:var(--white);padding:30px}.guide-card .num{color:var(--teal);font-weight:700;font-size:.75rem}.guide-card p,.section p,.section li{color:var(--muted)}.section{padding:50px 0;border-top:1px solid var(--line)}.facts{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.fact{background:var(--white);padding:22px}.fact strong{display:block;margin-bottom:5px}.source-list a{display:block;margin:9px 0;color:var(--teal)}.return-card{margin-top:45px;background:var(--ink);color:#fff;padding:30px;display:flex;align-items:center;justify-content:space-between;gap:30px}.return-card p{color:#b7c5c1;margin:7px 0 0}.button{background:var(--lime);color:var(--ink);padding:14px 18px;text-decoration:none;font-weight:700;white-space:nowrap}.lang-content[hidden]{display:none}footer{padding:25px clamp(20px,6vw,90px);border-top:1px solid var(--line);color:#71817d;font-size:.75rem}@media(max-width:760px){.guide-main{padding-top:55px}.guide-grid,.facts{grid-template-columns:1fr}.return-card{align-items:flex-start;flex-direction:column}.guide-header{height:auto;min-height:64px;padding-top:10px;padding-bottom:10px}.back{font-size:.8rem}}