:root{--paper:#f2ede3;--ink:#171713;--muted:#706b61;--moss:#636544;--gold:#c29547;--line:rgba(23,23,19,.17)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h1,h2{font-family:"Songti SC",STSong,serif;font-weight:400}img{display:block;max-width:100%}
.site-header{height:88px;display:flex;align-items:center;gap:40px;padding:0 4.5vw;position:absolute;z-index:10;width:100%;color:#fff;border-bottom:1px solid #ffffff40}.brand{margin-right:auto}.brand img{width:240px;filter:brightness(0) invert(1)}nav{display:flex;gap:34px;font-size:13px;letter-spacing:.08em}.header-cta{border-left:1px solid #ffffff50;padding-left:30px;font-size:12px}.hero{height:min(920px,100svh);min-height:700px;position:relative;overflow:hidden;color:#fff}.hero-image{width:100%;height:100%;object-fit:cover}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,#120f0ab8,#120f0a55 48%,#120f0a15 80%)}.hero-copy{position:absolute;left:7vw;top:52%;transform:translateY(-43%);max-width:820px}.eyebrow{font:500 11px/1 Arial;letter-spacing:.28em}.hero-copy .eyebrow:after{content:"";display:block;width:42px;height:2px;background:var(--gold);margin:28px 0 38px}.hero h1{font-size:clamp(52px,5.2vw,80px);line-height:1.25;letter-spacing:.03em}.hero-lede{font-size:17px;line-height:1.9;margin:30px 0 38px;color:#ffffffd6}.button{display:inline-flex;justify-content:space-between;gap:30px;background:var(--moss);color:#fff;padding:20px 24px;font-size:14px;min-width:245px}.section{padding:125px 7vw}.section-index{font-size:10px;letter-spacing:.22em;color:var(--muted)}.kicker{color:var(--gold);font-size:12px;letter-spacing:.2em;margin-bottom:24px}.section h2{font-size:clamp(38px,4.1vw,64px);line-height:1.42}.large-copy{font:17px/2 "Songti SC",serif;color:#5b564e;margin-top:34px;max-width:780px}.statement{display:grid;grid-template-columns:1fr 3fr;gap:8vw;border-bottom:1px solid var(--line)}.statement .large-copy{margin-left:auto}
.works{background:#e4ddd1}.section-heading{display:grid;grid-template-columns:1fr 3fr;gap:8vw;margin-bottom:65px}.works-note{font:17px/2 "Songti SC",STSong,serif;color:#5b564e;margin-top:34px;max-width:780px}.service-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:34px 20px}.service-cards article{background:#eee8de;border:1px solid var(--line)}.project-image{aspect-ratio:4/3;overflow:hidden;background:#c9c0b3}.project-image img{width:100%;height:100%;object-fit:cover;object-position:center;transition:transform .6s ease}.service-cards article:hover .project-image img{transform:scale(1.015)}.card-copy{padding:25px 25px 29px;min-height:175px}.card-copy>p{font:500 9px Arial;letter-spacing:.2em;color:var(--gold)}.card-copy h3{font:400 26px/1.3 "Songti SC",serif;margin:12px 0 15px}.card-copy>span{font:13px/1.85 "Songti SC",serif;color:var(--muted)}
.method{background:#20221b;color:#eee9df;display:grid;grid-template-columns:1fr 1.7fr;gap:8vw}.method-intro .section-index{color:#aaa89d;margin-bottom:72px}.method-intro h2{font-size:clamp(36px,3.25vw,54px)}.method-intro h2 span{display:block;white-space:nowrap}.method-list{border-top:1px solid #ffffff2e}.method-list article{padding:30px 32px;border-bottom:1px solid #ffffff2e;display:grid;grid-template-columns:55px 1fr;gap:20px}.method-list span{font:10px Arial;color:var(--gold);padding-top:7px}.method-list h3{font:24px/1.3 "Songti SC",serif;margin-bottom:10px}.method-list p{font-size:13px;line-height:1.8;color:#aaa89d}
.about{display:grid;grid-template-columns:1fr 1.35fr;gap:9vw;align-items:center}.about-photo{aspect-ratio:4/3;overflow:hidden;background:#d8d0c4}.about-photo img{width:100%;height:100%;object-fit:cover;object-position:right center}.about .section-index{margin-bottom:58px}.stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:50px;border-top:1px solid var(--line);padding-top:28px;gap:18px}.stats div{display:flex;flex-direction:column;gap:8px}.stats b{font:27px Arial;color:var(--gold)}.stats span{font-size:11px;color:var(--muted)}
.contact{text-align:center;background:#676747;color:#fff;padding:120px 24px}.contact>.contact-mark{width:70px;margin:0 auto 32px;filter:brightness(0) invert(1);opacity:.7}.contact h2{font:400 clamp(40px,4.4vw,66px)/1.45 "Songti SC",serif;margin:36px 0 22px}.contact>p:not(.eyebrow){font:15px/2 "Songti SC",serif;max-width:720px;margin:0 auto 36px;color:#ffffffbf}.wechat-contact{display:flex;flex-direction:column;align-items:center;gap:14px}.wechat-contact img{width:210px;height:210px;object-fit:cover;background:#fff;padding:8px}.wechat-contact small{font-size:11px;letter-spacing:.16em;color:#ffffffc7}.light{background:var(--paper);color:var(--ink)}footer{background:#171713;color:#aaa89d;padding:42px 5vw;display:flex;align-items:center;gap:40px;font-size:11px}footer img{width:190px;filter:brightness(0) invert(1);opacity:.75}footer p:nth-child(2){margin-right:auto}footer a{display:inline-block;margin-top:8px;color:inherit;text-decoration:none}footer a:hover{color:#fff}
@media(max-width:900px){.site-header{height:72px;padding:0 20px}.brand img{width:190px}nav,.header-cta{display:none}.hero{height:90svh}.hero-copy{left:24px;right:24px}.hero h1{font-size:43px}.hero-lede{font-size:14px}.section{padding:84px 24px}.statement,.section-heading,.method,.about{grid-template-columns:1fr}.statement,.section-heading{gap:40px}.service-cards{grid-template-columns:repeat(2,1fr);gap:12px}.method{gap:55px}.about{gap:45px}.stats{gap:12px}.contact{padding:95px 22px}footer{align-items:flex-start;flex-direction:column;gap:18px}footer p:nth-child(2){margin:0}}
@media(max-width:560px){.hero h1{font-size:38px}.hero-lede br{display:none}.service-cards{grid-template-columns:1fr}.card-copy{min-height:auto}.method-intro h2{font-size:34px}.method-list article{grid-template-columns:35px 1fr;padding:25px 16px}.stats{grid-template-columns:1fr}.stats div{border-bottom:1px solid var(--line);padding-bottom:14px}}
+

/* Mobile navigation and responsive refinement */
.mobile-menu{display:none}
.text-arrow,.mobile-contact i{font:400 18px/1 Arial,sans-serif;font-style:normal}
.button{align-items:center}
@media(max-width:900px){
  .site-header{height:70px;padding:0 20px;background:linear-gradient(180deg,rgba(12,10,7,.48),transparent);border-bottom-color:#ffffff35}
  .brand img{width:184px}
  nav,.header-cta{display:none}
  .mobile-menu{display:block;position:relative;margin-left:auto}
  .mobile-menu summary{width:42px;height:42px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;list-style:none;border:1px solid #ffffff6b;background:#18150f40}
  .mobile-menu summary::-webkit-details-marker{display:none}
  .mobile-menu summary span{width:18px;height:1px;background:#fff;transition:transform .25s ease,opacity .2s ease}
  .mobile-menu[open] summary span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .mobile-menu[open] summary span:nth-child(2){opacity:0}
  .mobile-menu[open] summary span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .mobile-menu-panel{position:absolute;right:0;top:50px;width:min(292px,calc(100vw - 40px));padding:12px 22px 20px;background:rgba(24,25,20,.97);box-shadow:0 16px 44px #0005;border:1px solid #ffffff24;backdrop-filter:blur(14px)}
  .mobile-menu-panel>a{display:flex;align-items:center;gap:18px;padding:17px 0;border-bottom:1px solid #ffffff22;font:20px/1.2 "Songti SC",STSong,serif}
  .mobile-menu-panel small{font:9px/1 Arial;color:var(--gold);letter-spacing:.16em}
  .mobile-menu-panel .mobile-contact{margin-top:12px;padding:17px 16px;border:0;background:var(--moss);font:14px/1.2 "PingFang SC","Microsoft YaHei",sans-serif;justify-content:space-between}
  .hero{height:100svh;min-height:650px;max-height:850px}
  .hero-image{object-position:73% center}
  .hero-shade{background:linear-gradient(180deg,rgba(13,10,7,.34) 0%,rgba(13,10,7,.14) 26%,rgba(13,10,7,.72) 72%,rgba(13,10,7,.88) 100%),linear-gradient(90deg,rgba(13,10,7,.58),rgba(13,10,7,.08))}
  .hero-copy{left:24px;right:24px;top:auto;bottom:42px;transform:none;max-width:620px}
  .hero-copy .eyebrow{font-size:9px;letter-spacing:.2em;white-space:nowrap}
  .hero-copy .eyebrow:after{margin:20px 0 25px;width:38px}
  .hero h1{font-size:clamp(35px,8.6vw,48px);line-height:1.28;letter-spacing:.01em}
  .hero-lede{font-size:14px;line-height:1.8;margin:20px 0 24px;max-width:520px}
  .button{min-width:226px;padding:17px 20px}
  .section{padding:82px 24px}
  .section h2{font-size:clamp(34px,8.5vw,46px)}
  .large-copy,.works-note{font-size:15px;line-height:1.9;margin-top:26px}
  .statement,.section-heading,.method,.about{grid-template-columns:1fr}
  .statement,.section-heading{gap:40px}
  .section-heading{margin-bottom:44px}
  .service-cards{grid-template-columns:repeat(2,1fr);gap:12px}
  .method{gap:50px}
  .method-intro .section-index{margin-bottom:46px}
  .about{gap:42px}
  .about .section-index{margin-bottom:34px}
  .stats{gap:12px}
  .contact{padding:88px 22px}
  .contact h2{font-size:clamp(35px,8.7vw,48px)}
  footer{align-items:flex-start;flex-direction:column;gap:18px;padding:34px 24px}
  footer img{width:175px}
  footer p:nth-child(2){margin:0}
}
@media(max-width:560px){
  .site-header{padding:0 16px}.brand img{width:172px}
  .hero{min-height:620px;max-height:820px}
  .hero-image{object-position:75% center}
  .hero-copy{left:20px;right:20px;bottom:30px}
  .hero h1{font-size:clamp(32px,9vw,40px)}
  .hero-lede br{display:none}
  .service-cards{grid-template-columns:1fr}
  .project-image{aspect-ratio:16/11}
  .card-copy{min-height:auto;padding:22px}
  .method-intro h2{font-size:32px}
  .method-intro h2 span{white-space:normal}
  .method-list article{grid-template-columns:35px 1fr;padding:25px 16px}
  .stats{grid-template-columns:1fr}
  .stats div{border-bottom:1px solid var(--line);padding-bottom:14px}
  .about-photo{aspect-ratio:4/3}
  .wechat-contact img{width:190px;height:190px}
}
@media(max-width:370px){
  .hero-copy .eyebrow{font-size:8px;letter-spacing:.15em}
  .hero h1{font-size:31px}
  .button{width:100%;min-width:0}
  .section{padding-left:20px;padding-right:20px}
}