:root{
  --red-900:#7a1a17;
  --red-700:#9b2420;
  --red-500:#d4452b;
  --orange-400:#ee8a4a;
  --cream-50:#fffaf6;
  --cream-100:#fdf1ea;
  --cream-200:#f8e2d6;
  --line:#efd3c4;
  --ink-900:#2a1d1a;
  --ink-700:#4d3f3b;
  --ink-500:#7a6b66;
  --white:#ffffff;
  --radius:14px;
  --shadow:0 1px 2px rgba(122,26,23,.06),0 8px 24px rgba(122,26,23,.07);
  --serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC","Noto Serif CJK SC","SimSun",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink-700);background:var(--cream-50);line-height:1.75;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* language switching */
html[lang="zh-CN"] .en{display:none!important}
html[lang="en"] .zh{display:none!important}
html[lang="en"] body{line-height:1.65}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,250,246,.92);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .2s}
.site-header.scrolled{border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand img{height:38px;width:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-family:var(--serif);color:var(--red-900);font-size:18px;letter-spacing:.04em}
.brand-text small{font-size:11px;color:var(--ink-500);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 12px;border-radius:8px;font-size:15px;color:var(--ink-700);transition:color .15s,background .15s}
.nav-links a:hover{color:var(--red-700);background:var(--cream-100)}
.lang-btn{margin-left:8px;border:1px solid var(--line);background:var(--white);color:var(--red-700);font:inherit;font-size:14px;padding:6px 14px;border-radius:999px;cursor:pointer}
.lang-btn:hover{border-color:var(--red-500)}
.menu-btn{display:none;border:0;background:none;width:40px;height:40px;cursor:pointer;position:relative}
.menu-btn span{position:absolute;left:10px;right:10px;height:2px;background:var(--red-900);transition:transform .2s,opacity .2s}
.menu-btn span:nth-child(1){top:13px}.menu-btn span:nth-child(2){top:19px}.menu-btn span:nth-child(3){top:25px}
.menu-open .menu-btn span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-open .menu-btn span:nth-child(2){opacity:0}
.menu-open .menu-btn span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* hero */
.hero{position:relative;overflow:hidden;background:#f3efec}
.hero-bg{position:absolute;inset:0;background:url(assets/ribbon.jpg) center 60%/cover no-repeat;opacity:.9}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(247,244,241,.94) 0%,rgba(247,244,241,.78) 45%,rgba(247,244,241,.15) 100%)}
.hero-inner{position:relative;z-index:1;padding:120px 0 110px;max-width:720px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--red-500);font-weight:600;text-transform:uppercase;margin-bottom:18px}
.hero h1{font-family:var(--serif);color:var(--red-900);font-size:clamp(34px,5.4vw,58px);line-height:1.2;font-weight:700;letter-spacing:.02em}
.hero .rule{width:88px;height:3px;background:var(--red-500);margin:26px 0}
.hero .lead{font-size:clamp(18px,2.2vw,22px);color:var(--red-700);font-weight:600;margin-bottom:14px}
.hero p.desc{font-size:16px;color:var(--ink-700);max-width:600px}
.hero-actions{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;transition:background .15s,color .15s,border-color .15s}
.btn-primary{background:var(--red-700);color:var(--white)}
.btn-primary:hover{background:var(--red-900)}
.btn-ghost{border:1px solid var(--red-700);color:var(--red-700);background:rgba(255,255,255,.6)}
.btn-ghost:hover{background:var(--white)}
.hero-facts{display:flex;gap:40px;margin-top:56px;flex-wrap:wrap}
.hero-facts div{border-left:2px solid var(--red-500);padding-left:14px}
.hero-facts b{display:block;font-family:var(--serif);font-size:24px;color:var(--red-900);line-height:1.3}
.hero-facts span{font-size:13px;color:var(--ink-500)}

/* sections */
section{padding:96px 0}
.alt{background:linear-gradient(180deg,var(--cream-100),var(--cream-50))}
.sec-head{max-width:820px;margin-bottom:48px}
.sec-head .eyebrow{margin-bottom:10px}
.sec-head h2{font-family:var(--serif);color:var(--red-900);font-size:clamp(28px,3.6vw,38px);line-height:1.3;font-weight:700}
.sec-head p{margin-top:16px;font-size:16.5px;color:var(--ink-700)}
h3{color:var(--red-900);font-size:19px;line-height:1.4;font-weight:700}
.sub-title{font-family:var(--serif);color:var(--red-900);font-size:24px;font-weight:700;margin:64px 0 24px;display:flex;align-items:baseline;gap:14px}
.sub-title .num{font-family:var(--sans);color:var(--red-500);font-size:18px;font-weight:700}
.sub-title:first-child{margin-top:0}

.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g5{grid-template-columns:repeat(5,1fr)}

.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.card h3{margin-bottom:10px}
.card p{font-size:15px;color:var(--ink-700)}
.card.top{border-top:3px solid var(--red-500)}
.card .tag{display:block;font-size:13px;font-weight:700;color:var(--red-500);letter-spacing:.08em;margin-bottom:10px}
.card.compact{padding:22px}
.card.compact h3{font-size:17px}
.card.compact p{font-size:14.5px}

.quote{margin-top:36px;background:var(--cream-200);border-radius:var(--radius);padding:26px 32px;color:var(--red-700);font-family:var(--serif);font-size:19px;font-weight:700;text-align:center;line-height:1.6}
.note{margin-top:28px;background:var(--white);border:1px solid var(--line);border-left:4px solid var(--red-500);border-radius:10px;padding:20px 24px;font-size:15.5px;color:var(--ink-700)}
.note b{color:var(--red-700)}

/* mission */
.mission{text-align:center;padding:0 0 56px}
.mission p{font-family:var(--serif);font-size:clamp(24px,3.4vw,36px);color:var(--red-900);font-weight:700;line-height:1.45}
.mission p em{font-style:normal;color:var(--red-500)}

/* service blocks */
.service{display:grid;grid-template-columns:5fr 7fr;gap:40px;align-items:start;padding:44px 0;border-top:1px solid var(--line)}
.sec-head + .service{border-top:0;padding-top:0}
.service-intro .num{font-size:15px;font-weight:700;color:var(--red-500);letter-spacing:.1em}
.service-intro h3{font-family:var(--serif);font-size:28px;margin:6px 0 14px}
.service-intro p{font-size:15.5px}
.service-intro figure{margin-top:24px}
.service-intro figure img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:3/2;object-fit:cover}
.service-intro figcaption{font-size:13px;color:var(--ink-500);margin-top:8px}
.service-items{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.service-items .card{padding:22px}
.service-items h3{font-size:17px;margin-bottom:6px}
.service-items p{font-size:14.5px}

/* partners */
.types .card h3{font-size:18px}
.uni{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.uni img{width:100%;aspect-ratio:16/9;object-fit:cover}
.uni .body{padding:22px 24px 24px}
.uni h3{margin-bottom:8px}
.uni p{font-size:14.5px}
.uni.small img{aspect-ratio:3/2}
.uni.small .body{padding:18px 20px 20px}
.uni.small h3{font-size:17px;margin-bottom:4px}

/* projects */
.project .body .label{display:block;font-size:13px;color:var(--red-500);font-weight:700;letter-spacing:.06em;margin-bottom:6px}
.project h3{font-family:var(--serif);font-size:21px;padding-bottom:12px;margin-bottom:12px;border-bottom:1px solid var(--line)}

/* strategy */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.split figure img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:4/3;object-fit:cover}
.split figcaption{font-size:13px;color:var(--ink-500);margin-top:8px}
.stack{display:grid;gap:16px}
.list-card h3{font-size:17px;margin-bottom:4px}
.list-card p{font-size:14.5px}
.list-card .item+.item{margin-top:18px;padding-top:18px;border-top:1px dashed var(--line)}
.list-card .col-title{font-family:var(--serif);font-size:22px;color:var(--red-900);margin-bottom:20px;display:flex;gap:12px;align-items:baseline}
.list-card .col-title span{font-family:var(--sans);color:var(--red-500);font-size:17px;font-weight:700}

/* why */
.why-list{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.why-item{padding:22px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:40px 1fr;gap:6px}
.why-item .n{font-weight:700;color:var(--red-500);font-size:15px;padding-top:2px}
.why-item h3{font-size:18px;margin-bottom:4px}
.why-item p{font-size:15px}

/* partner band */
.band{background:var(--red-900);color:#f7e6de}
.band .sec-head h2{color:var(--white)}
.band .sec-head .eyebrow{color:var(--orange-400)}
.band .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);box-shadow:none}
.band .card h3{color:var(--white)}
.band .card p{color:#f0d9cf}
.band .card .tag{color:var(--orange-400)}
.band .card strong{color:var(--orange-400);font-weight:700}
.band .closing{margin-top:40px;text-align:center;font-family:var(--serif);font-size:clamp(19px,2.4vw,24px);color:var(--white);font-weight:700}

/* contact */
.contact-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.office{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}
.office .card{padding:22px}
.office h3{font-size:17px;margin-bottom:4px}
.office p{font-size:14.5px}
.contact-rows{display:grid;gap:12px}
.contact-row{display:flex;align-items:center;gap:16px;background:var(--cream-100);border:1px solid var(--line);border-radius:12px;padding:16px 22px;font-size:16px}
.contact-row .k{color:var(--ink-500);font-size:14px;min-width:88px}
.contact-row a,.contact-row .v{color:var(--ink-900);font-weight:600;word-break:break-all}
.contact-row a:hover{color:var(--red-700)}
.contact-brand{text-align:center}
.contact-brand img{width:220px;margin:0 auto 24px}
.contact-brand .slogan{font-family:var(--serif);color:var(--red-900);font-size:22px;font-weight:700}
.contact-brand .slogan-sub{color:var(--red-500);font-size:15px;margin-top:6px}

footer{background:var(--ink-900);color:#bfb1ac;font-size:14px;padding:32px 0}
footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

/* responsive */
@media (max-width:1080px){
  .g5{grid-template-columns:repeat(3,1fr)}
  .g4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:920px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:var(--cream-50);flex-direction:column;align-items:stretch;padding:12px 16px 20px;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(0,0,0,.06);display:none}
  .menu-open .nav-links{display:flex}
  .nav-links a{padding:12px 10px;font-size:16px}
  .lang-btn{margin:8px 0 0;align-self:flex-start}
  .menu-btn{display:block}
  .service,.split,.contact-grid{grid-template-columns:1fr;gap:28px}
  .g3{grid-template-columns:1fr 1fr}
  .why-list{grid-template-columns:1fr}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  section{padding:64px 0}
  .hero-inner{padding:72px 0 64px}
  .hero::after{background:linear-gradient(180deg,rgba(247,244,241,.92),rgba(247,244,241,.86))}
  .hero-facts{gap:22px}
  .g2,.g3,.g4,.g5,.service-items,.office{grid-template-columns:1fr}
  .card{padding:22px}
  .quote{padding:20px;font-size:17px}
  .brand-text small{display:none}
  .contact-row{flex-direction:column;align-items:flex-start;gap:2px}
}

.qr-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.qr{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:10px;overflow:hidden}
.qr img{width:100%;height:auto;border-radius:8px}
@media (max-width:640px){.qr-row{grid-template-columns:1fr;max-width:300px;margin:0 auto}}