:root{--ink:#211e19;--brown:#876d4d;--red:#d72730;--cream:#eee8dd;--paper:#fff;--soft:#f7f4ee;--line:#ddd4c7;--muted:#71695f;--shell:1420px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--ink);line-height:1.75}img{display:block;max-width:100%}a{text-decoration:none;color:inherit}
.header-shell,.hero,.wide-section,.steps-section,.orientation-shell,.faq-section,.footer-shell{width:min(calc(100% - 56px),var(--shell));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}.header-shell{height:74px;display:grid;grid-template-columns:240px 1fr 140px;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:9px;font-weight:900;letter-spacing:.13em}.brand img,footer img{height:28px;width:auto;background:#211e19;padding:5px 9px}.site-nav{display:flex;justify-content:center;gap:25px;font-size:12px;font-weight:800;color:#71695f}.top-btn{background:var(--ink);color:#fff;padding:10px 14px;font-size:12px;font-weight:900}.menu-button{display:none}
.kicker{font-size:10px;font-weight:900;letter-spacing:.15em;color:var(--brown);margin:0 0 12px}.hero{padding:72px 0 45px;text-align:center}.hero h1{margin:0;font-size:clamp(58px,8vw,112px);line-height:.91;letter-spacing:-.075em}.hero-copy>p:not(.kicker){max-width:950px;margin:28px auto;color:var(--muted);font-size:18px}.primary{display:inline-flex;background:var(--red);color:#fff;padding:15px 20px;font-weight:900}.hero-image{margin:45px auto 0;max-width:1220px}.hero-image img{width:100%;max-height:540px;object-fit:contain;background:var(--soft)}figcaption{margin-top:8px;color:var(--muted);font-size:10px}
.download-line{width:min(calc(100% - 56px),var(--shell));margin:auto;display:grid;grid-template-columns:repeat(3,1fr) 280px;border-top:2px solid var(--ink);border-left:1px solid var(--line)}.download-line>div{padding:18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.download-line span{display:block;font-size:8px;font-weight:900;color:var(--brown)}.download-line strong{font-size:12px}.download-line>a{display:grid;place-items:center;background:var(--red);color:#fff;font-weight:900;font-size:12px}
.wide-section,.steps-section,.faq-section{padding:95px 0}.section-head{max-width:900px}.section-head h2,.orientation-shell h2{font-size:clamp(34px,4vw,52px);letter-spacing:-.045em;line-height:1.15;margin:0}.section-head>p:not(.kicker),.orientation-shell p:not(.kicker){color:var(--muted)}
.wide-main{margin:40px 0}.wide-main img{width:100%;max-height:520px;object-fit:contain;background:var(--soft)}.wide-pair{display:grid;grid-template-columns:1fr 1fr;gap:22px}.wide-pair figure{margin:0}.wide-pair img{width:100%;aspect-ratio:1.45/1;object-fit:contain;background:var(--soft)}
.steps-section{background:var(--cream);width:100%;padding-left:max(28px,calc((100% - var(--shell))/2));padding-right:max(28px,calc((100% - var(--shell))/2))}.step-rows{max-width:1000px;margin-top:35px;border-top:2px solid var(--ink)}.step-rows article{display:grid;grid-template-columns:90px 1fr;gap:22px;padding:20px 0;border-bottom:1px solid #d4c8b8}.step-rows b{color:var(--brown);font-size:26px}.step-rows h3{margin:-3px 0 5px}.step-rows p{margin:0;color:var(--muted)}
.orientation{background:#1d1b18;color:#fff}.orientation-shell{display:grid;grid-template-columns:1.2fr .8fr;gap:65px;align-items:center;padding:95px 0}.orientation-shell figure{margin:0}.orientation-shell img{width:100%;max-height:470px;object-fit:contain;background:#0c0b0a}.orientation-shell p:not(.kicker){color:#aaa}
.faq-list{margin-top:30px;border-top:2px solid var(--ink)}details{border-bottom:1px solid var(--line)}summary{list-style:none;position:relative;padding:20px 45px 20px 0;font-weight:850;cursor:pointer}summary span{position:absolute;right:0}.faq-list p{margin:-3px 0 20px;color:var(--muted)}
footer{background:#11100e;color:#777;padding:40px 0}.footer-shell p{font-size:10px;max-width:850px}.mobile-bar{display:none}
@media(max-width:800px){.header-shell{grid-template-columns:1fr auto}.site-nav,.top-btn{display:none}.menu-button{display:block}.site-nav.is-open{display:grid;position:absolute;top:70px;left:18px;right:18px;background:#fff;padding:12px;border:1px solid var(--line)}.download-line{grid-template-columns:1fr 1fr}.orientation-shell{grid-template-columns:1fr}}
@media(max-width:600px){body{padding-bottom:60px}.header-shell,.hero,.wide-section,.steps-section,.orientation-shell,.faq-section,.footer-shell,.download-line{width:min(calc(100% - 28px),var(--shell))}.brand span{display:none}.hero{padding-top:52px;text-align:left}.hero h1{font-size:clamp(45px,13vw,62px)}.hero-copy>p:not(.kicker){font-size:16px}.download-line,.wide-pair{grid-template-columns:1fr}.steps-section{padding:70px 14px}.step-rows article{grid-template-columns:1fr;gap:5px}.orientation-shell{padding:70px 0}.mobile-bar{position:fixed;left:0;right:0;bottom:0;z-index:90;height:60px;background:#1d1b18;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:8px 14px}.mobile-bar a{background:var(--red);padding:9px 15px;font-weight:900}}