.wechat-share-cover{position:absolute;width:1px;height:1px;opacity:.001;pointer-events:none}
.site-head nav a.active{color:#fff;border-bottom:1px solid #d09a63;padding-bottom:8px}
.home-return{white-space:nowrap;text-decoration:none;font-size:10px;color:#d8c6ad;border-left:1px solid #ffffff29;padding-left:20px;transition:.25s}.home-return:hover{color:#fff;transform:translateX(-2px)}
.about-hero{min-height:100vh;padding:150px 7vw 44px;background:#17251f;color:#f6eddd;position:relative;display:grid;grid-template-columns:1.25fr .65fr;grid-template-rows:1fr auto;gap:55px 9vw;align-items:center;overflow:hidden}
.about-hero-art{position:absolute;inset:0;background:linear-gradient(90deg,#17251ff5 0%,#17251fcb 50%,#17251f52 100%),linear-gradient(0deg,#17251f 0%,transparent 38%),url('assets/luxury-airscape.png') center/cover no-repeat;opacity:.62;filter:saturate(.7)}
.about-hero:after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,transparent 55%,#d6a2681b 55%),radial-gradient(circle at 78% 27%,#d8aa6d2e,transparent 28%)}
.about-hero-copy,.about-hero-note,.about-proof{position:relative;z-index:1}
.about-hero h1{font:500 clamp(56px,6.3vw,96px)/1.12 Georgia,"Songti SC",serif;letter-spacing:-4px;margin:24px 0 28px}
.about-hero h1 em{font-style:normal;color:#edc28e}
.about-hero-copy>p{max-width:720px;color:#c9c1b5;font-size:14px;line-height:2}
.about-hero-note{padding:35px;border:1px solid #ffffff27;background:#13201ab8;backdrop-filter:blur(8px)}
.about-hero-note small{font:9px Georgia;letter-spacing:3px;color:#d69a62}
.about-hero-note blockquote{font:30px/1.55 Georgia,"Songti SC",serif;margin:23px 0;color:#f3e4cf}
.about-hero-note p{font-size:11px;line-height:2;color:#a9a197}
.about-proof{grid-column:1/3;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #ffffff32}
.about-proof>div{padding:28px 2vw 8px;border-right:1px solid #ffffff24;display:flex;align-items:baseline;gap:18px}
.about-proof>div:last-child{border-right:0}
.about-proof strong{font:italic 45px Georgia;color:#e2ad73}.about-proof sup{font-size:14px}.about-proof span{font-size:11px;color:#bbb2a4}
.about-story{padding:120px 8vw;display:grid;grid-template-columns:.7fr 1.1fr;gap:10vw}
.about-story h2{font:500 clamp(44px,4.7vw,72px)/1.3 Georgia,"Songti SC",serif;margin:18px 0}
.story-body{font-size:14px;line-height:2.2;color:#71695e}.story-body p{margin:0 0 26px}
.story-body blockquote{margin:42px 0 0;border-left:4px solid #c86832;padding:8px 0 8px 25px;font:30px/1.6 Georgia,"Songti SC",serif;color:#264238}.story-body blockquote small{font:9px Georgia;letter-spacing:3px;color:#9e6e4d}
.advantages{background:#20342d;color:#f4ead8;padding:110px 6vw}.advantages .section-head>p{color:#aaa497}
.advantage-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #ffffff2a;border-left:1px solid #ffffff1c}
.advantage-grid article{min-height:270px;padding:33px;border-right:1px solid #ffffff1c;border-bottom:1px solid #ffffff1c;transition:.35s}
.advantage-grid article:hover{background:#f0e3cd;color:#20342d;transform:translateY(-5px)}
.advantage-grid article>span{font:italic 15px Georgia;color:#d3935c}.advantage-grid h3{font:25px/1.45 Georgia,"Songti SC",serif;margin:45px 0 15px}.advantage-grid p{font-size:11px;line-height:2;color:#9da79f}.advantage-grid article:hover p{color:#6f6a60}
.technology{background:#eee4d2;display:grid;grid-template-columns:1.1fr .9fr;min-height:620px}.tech-image{min-height:620px;overflow:hidden;padding:40px;display:flex;align-items:center;justify-content:center;background:#f6f0e5}.tech-image img{width:100%;height:auto;max-height:560px;object-fit:contain;display:block;filter:saturate(.78) contrast(1.02);box-shadow:0 20px 50px #31423918}
.tech-copy{padding:80px 6vw;display:flex;flex-direction:column;justify-content:center}.tech-copy h2{font:500 clamp(38px,4vw,62px)/1.35 Georgia,"Songti SC",serif;margin:20px 0}.tech-copy>p{font-size:12px;line-height:2;color:#746b5f}
.tech-copy ul{list-style:none;padding:0;margin:32px 0 0;display:grid;grid-template-columns:1fr 1fr;border-top:1px solid #bbaa90}.tech-copy li{padding:18px 10px;border-bottom:1px solid #bbaa90;display:grid;gap:5px}.tech-copy li:nth-child(odd){border-right:1px solid #bbaa90}.tech-copy li b{font:16px Georgia;color:#9c5b37}.tech-copy li span{font-size:9px;color:#7c7367}
.service-belief{padding:110px 7vw;display:grid;grid-template-columns:.8fr 1.2fr;gap:7vw;align-items:center}.service-belief h2{font:500 clamp(40px,4.4vw,67px)/1.35 Georgia,"Songti SC",serif;margin:18px 0}.service-belief-copy>p{font-size:12px;line-height:2;color:#746b60}.service-belief-copy>div{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}.service-belief-copy b{font-size:10px;border:1px solid #b5a68f;padding:9px 12px}.service-belief figure{margin:0;min-height:520px;overflow:hidden}.service-belief figure img{width:100%;height:100%;min-height:520px;object-fit:cover;display:block;filter:saturate(.76) contrast(1.03)}
.honor{padding:110px 6vw;background:#d8c6aa}.ip-summary{display:grid;grid-template-columns:repeat(3,1fr);background:#20342d;color:#f4ead8;margin-bottom:16px}.ip-summary>div{padding:30px;border-right:1px solid #ffffff25;display:grid;gap:7px}.ip-summary strong{font:italic 38px Georgia;color:#e0a96f}.ip-summary sup{font-size:12px}.ip-summary span{font:19px Georgia,"Songti SC",serif}.ip-summary small{font-size:9px;color:#9da79f;line-height:1.7}.ip-summary>a{grid-column:1/4;padding:15px 30px;border-top:1px solid #ffffff25;color:#d9a16e;font-size:9px;text-decoration:none}.record-columns{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}.record-card{background:#eee3d2;padding:40px}.record-card h3{font:32px Georgia,"Songti SC",serif;margin:0 0 30px}.record-card ol{list-style:none;margin:0;padding:0;border-top:1px solid #b2a187}.record-card li{display:grid;grid-template-columns:76px 1fr;gap:20px;padding:17px 0;border-bottom:1px solid #c5b69f}.record-card time{font:italic 14px Georgia;color:#a75b32}.record-card span{font-size:11px;line-height:1.8;color:#625c53}.record-card span b{font-size:8px;color:#fff;background:#a75b32;padding:3px 6px;margin-right:7px}.record-card a{text-decoration:none;border-bottom:1px solid #9b8b7538}.ip-pending{margin-top:16px;background:#ede1cf;padding:34px 40px;display:grid;grid-template-columns:.75fr 1.25fr;gap:20px 50px;border-left:4px solid #a75b32}.ip-pending>div>span{font:9px Georgia;letter-spacing:3px;color:#a75b32}.ip-pending h3{font:25px Georgia,"Songti SC",serif;margin:10px 0}.ip-pending ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:10px}.ip-pending li{font-size:11px;border-bottom:1px solid #c5b69f;padding:8px 0}.ip-pending p{grid-column:1/3;font-size:9px;color:#746b5f;margin:0;line-height:1.8}.record-note,.partner-note{font-size:9px;color:#746b5f;margin:20px 0 0}
.partners{padding:110px 6vw}.partner-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #c2b49d;border-left:1px solid #c2b49d}.partner-grid figure{margin:0;min-height:185px;padding:25px;background:#f7f2e9;border-right:1px solid #c2b49d;border-bottom:1px solid #c2b49d;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:15px;transition:.3s}.partner-grid figure:hover{background:#fff;transform:translateY(-3px)}.partner-grid img{width:100%;height:85px;object-fit:contain;mix-blend-mode:multiply;filter:saturate(.78)}.partner-grid figcaption{font:9px Georgia;letter-spacing:1px;color:#8c8171}
@media(max-width:1000px){.about-hero{grid-template-columns:1fr}.about-hero-note{max-width:520px}.about-proof{grid-column:auto}.about-story{grid-template-columns:1fr}.advantage-grid{grid-template-columns:1fr 1fr}.technology{grid-template-columns:1fr}.tech-image{min-height:auto}.service-belief{grid-template-columns:1fr}.record-columns{grid-template-columns:1fr}.partner-grid{grid-template-columns:1fr 1fr}}
@media(max-width:650px){.home-return{font-size:0;padding-left:10px}.home-return:after{content:"首页";font-size:10px}.about-hero{padding:110px 20px 30px;gap:35px}.about-hero h1{font-size:47px;letter-spacing:-2px}.about-hero-note{padding:24px}.about-proof{grid-template-columns:1fr}.about-proof>div{border-right:0;border-bottom:1px solid #ffffff24;padding:18px 0}.about-story,.advantages,.service-belief,.honor,.partners{padding:75px 20px}.advantage-grid,.record-columns,.partner-grid,.ip-summary{grid-template-columns:1fr}.ip-summary>a{grid-column:auto}.technology{display:flex;flex-direction:column}.tech-image{min-height:auto;padding:18px}.tech-image img{max-height:none}.tech-copy{padding:60px 20px}.service-belief figure,.service-belief figure img{min-height:330px}.record-card{padding:28px 22px}.record-card li{grid-template-columns:65px 1fr}.ip-pending{grid-template-columns:1fr;padding:28px 22px}.ip-pending ul{grid-template-columns:1fr}.ip-pending p{grid-column:auto}.partner-grid figure{min-height:145px}.partner-grid img{height:70px}}

/* v3: full-bleed secondary BIM artwork and unified innovation record */
.technology{grid-template-columns:1.22fr .78fr;min-height:650px}
.tech-image{min-height:650px;padding:0;background:#dfe8df}
.tech-image img{width:100%;height:100%;max-height:none;object-fit:cover;box-shadow:none}
.record-columns{grid-template-columns:1.32fr .68fr}
.record-card-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:30px}
.record-card-head h3{margin:0}
.record-card-head>a{font-size:9px;color:#a75b32;white-space:nowrap;text-decoration:none}
.record-card span b.pending{background:#677c70}
@media(max-width:1000px){.technology,.record-columns{grid-template-columns:1fr}.tech-image{min-height:auto;aspect-ratio:16/9}}
@media(max-width:650px){.tech-image{padding:0;aspect-ratio:16/9}.record-card-head{align-items:flex-start;flex-direction:column}.record-card-head>a{white-space:normal}}

/* v4: full-width BIM canvas with floating glass copy */
.technology{position:relative;display:block;min-height:780px;overflow:hidden;background:#dfe8df}
.tech-image{position:absolute;inset:0;min-height:0;padding:0;display:block}
.tech-image:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 0 48%,#14251b18 70%,#14251b35 100%);pointer-events:none}
.tech-image img{width:100%;height:100%;object-fit:cover;object-position:center;display:block}
.tech-copy{position:relative;z-index:2;width:min(650px,47vw);min-height:780px;margin-left:auto;padding:90px 6vw;display:flex;flex-direction:column;justify-content:center;background:linear-gradient(135deg,#f4ead9d9,#eee1ccbf);border-left:1px solid #ffffff9c;box-shadow:-26px 0 70px #18271f2e;backdrop-filter:blur(18px) saturate(.9);-webkit-backdrop-filter:blur(18px) saturate(.9)}
@media(max-width:1000px){.technology{min-height:auto;padding:0 0 42px}.tech-image{position:relative;aspect-ratio:16/9}.tech-image:after{background:linear-gradient(180deg,transparent 50%,#17251f38)}.tech-copy{width:calc(100% - 44px);min-height:auto;margin:-42px 22px 0;padding:55px 38px;background:#f4ead9df;border:1px solid #ffffffa8}}
@media(max-width:650px){.technology{padding-bottom:22px}.tech-copy{width:calc(100% - 28px);margin:-24px 14px 0;padding:42px 22px}.tech-copy h2{font-size:37px}}