/* ===== 非凡影像 — 简约高级感 ===== */
:root{
  --bg:#ffffff;
  --ink:#111111;
  --ink2:#6b6b6b;
  --line:#e8e6e2;
  --dark:#101010;
  --dark2:#171717;
  --accent:#b9925a;   /* 暖金 */
  --serif:"Noto Serif SC","Songti SC",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --en:"Cormorant Garamond",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;width:100%;height:100%;object-fit:cover}
a{color:inherit;text-decoration:none}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.center{text-align:center;margin-top:48px}
h1,h2,h3{font-family:var(--serif);font-weight:600}

/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s;padding:18px 0}
.nav.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);padding:12px 0;box-shadow:0 1px 0 var(--line)}
.nav-inner{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;flex-direction:column;line-height:1.2;color:#fff;transition:.4s}
.nav.scrolled .logo,.footer .logo{color:var(--ink)}
.logo-cn{font-family:var(--serif);font-size:22px;font-weight:700;letter-spacing:6px}
.logo-en{font-size:10px;letter-spacing:4px;color:var(--accent)}
.menu{display:flex;align-items:center;gap:36px}
.menu a{font-size:14px;letter-spacing:2px;color:rgba(255,255,255,.85);transition:.3s;position:relative}
.menu a:hover{color:#fff}
.menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--accent);transition:.3s}
.menu a:hover::after{width:100%}
.nav.scrolled .menu a{color:var(--ink)}
.nav.scrolled .menu a:hover{color:#000}
.menu-cta{border:1px solid rgba(255,255,255,.5);padding:8px 20px !important}
.nav.scrolled .menu-cta{border-color:var(--ink)}
.menu-cta:hover{background:var(--accent);border-color:var(--accent) !important;color:#fff !important}
.burger{display:none;background:none;border:0;cursor:pointer}
.burger span{display:block;width:24px;height:2px;background:#fff;margin:5px 0;transition:.3s}
.nav.scrolled .burger span{background:var(--ink)}

/* hero */
.hero{position:relative;height:100vh;min-height:640px;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media img{animation:kb 18s ease-in-out infinite alternate;transform:scale(1.05)}
@keyframes kb{to{transform:scale(1.15) translateY(-2%)}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.45),rgba(0,0,0,.55))}
.hero-content{position:relative;z-index:2;padding:0 24px;animation:up 1.2s .2s both}
@keyframes up{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:none}}
.hero-kicker{font-size:13px;letter-spacing:8px;color:rgba(255,255,255,.8);margin-bottom:24px}
.hero h1{font-size:clamp(42px,7vw,88px);letter-spacing:10px;font-weight:700}
.serif-i{font-family:var(--en);font-style:italic;font-weight:400;color:var(--accent);letter-spacing:2px}
.hero-sub{margin-top:24px;font-weight:300;color:rgba(255,255,255,.85);letter-spacing:1px}
.hero-actions{margin-top:44px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-scroll{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);font-size:10px;letter-spacing:4px;color:rgba(255,255,255,.6);display:flex;flex-direction:column;align-items:center;gap:10px}
.hero-scroll span{width:1px;height:44px;background:rgba(255,255,255,.5);animation:drop 1.8s infinite}
@keyframes drop{from{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1)}to{transform:scaleY(0);transform-origin:bottom}}

/* buttons */
.btn{display:inline-block;padding:14px 40px;font-size:14px;letter-spacing:3px;transition:.35s;border:1px solid transparent;cursor:pointer}
.btn-solid{background:var(--accent);color:#fff}
.btn-solid:hover{background:#a67f49;color:#fff}
.btn-ghost{border-color:rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:#fff;color:var(--ink)}
.btn-outline{border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}

/* stats */
.stats{padding:64px 0;border-bottom:1px solid var(--line)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat strong{font-family:var(--en);font-size:52px;font-weight:600;color:var(--ink);line-height:1}
.stat strong span{font-family:var(--serif);font-size:20px;color:var(--accent);margin-left:4px}
.stat p{margin-top:8px;font-size:13px;letter-spacing:3px;color:var(--ink2)}

/* sections */
.section{padding:110px 0}
.section-dark{background:var(--dark);color:#f2f0ec}
.section-dark h2,.section-dark h3{color:#fff}
.sec-head{text-align:center;margin-bottom:64px}
.sec-en{font-family:var(--en);font-size:14px;letter-spacing:8px;color:var(--accent);display:block;margin-bottom:14px}
.sec-head h2{font-size:36px;letter-spacing:6px}
.sec-head p{margin-top:14px;color:var(--ink2);font-weight:300}
.section-dark .sec-head p{color:rgba(255,255,255,.6)}

/* filter */
.filter{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:48px}
.filter button{background:none;border:1px solid var(--line);padding:8px 22px;font-size:13px;letter-spacing:2px;color:var(--ink2);cursor:pointer;transition:.3s;font-family:var(--sans)}
.filter button.active,.filter button:hover{border-color:var(--ink);color:var(--ink);background:var(--ink);color:#fff}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{position:relative;aspect-ratio:4/5;overflow:hidden;display:block}
.case img{transition:1s cubic-bezier(.2,.6,.2,1)}
.case:hover img{transform:scale(1.08)}
.case-info{position:absolute;left:0;right:0;bottom:0;padding:28px 24px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.75));transform:translateY(12px);opacity:0;transition:.4s}
.case:hover .case-info{transform:none;opacity:1}
.case-info span{font-size:11px;letter-spacing:3px;color:var(--accent)}
.case-info h3{font-size:18px;margin-top:6px;letter-spacing:1px}
.case.hide{display:none}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:rgba(255,255,255,.08)}
.svc{background:var(--dark);padding:48px 36px;transition:.4s;position:relative}
.svc:hover{background:var(--dark2)}
.svc-no{font-family:var(--en);font-size:15px;color:var(--accent);letter-spacing:2px}
.svc h3{margin:16px 0 12px;font-size:20px;letter-spacing:2px}
.svc p{font-size:14px;color:rgba(255,255,255,.55);font-weight:300}

/* why */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:40px}
.why{border-top:2px solid var(--accent);padding-top:24px}
.why h3{font-size:18px;letter-spacing:2px}
.why p{margin-top:10px;font-size:14px;color:var(--ink2);font-weight:300}

/* about */
.about{background:#f7f5f2}
.about-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:72px;align-items:center}
.about-img{aspect-ratio:4/5;overflow:hidden}
.about-img img{transition:1s}
.about-img:hover img{transform:scale(1.05)}
.about-txt h2{font-size:34px;letter-spacing:4px;margin:14px 0 24px}
.about-txt p{color:var(--ink2);font-weight:300;margin-bottom:16px}
.about-txt .btn{margin-top:16px}

/* team */
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.member{text-align:center}
.member img{aspect-ratio:3/4;filter:grayscale(60%);transition:.6s}
.member:hover img{filter:none}
.member h3{margin:20px 0 8px;font-size:18px;letter-spacing:2px}
.member p{font-size:14px;color:rgba(255,255,255,.55);font-weight:300;padding:0 12px}

/* news */
.news-list{border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:110px 1fr auto;gap:24px;align-items:center;padding:28px 8px;border-bottom:1px solid var(--line);transition:.3s}
.news-item:hover{background:#faf9f7;padding-left:20px}
.news-item time{font-family:var(--en);color:var(--accent);font-size:15px;letter-spacing:1px}
.news-item h3{font-size:17px;letter-spacing:1px}
.news-item p{font-size:13px;color:var(--ink2);font-weight:300;margin-top:4px}
.news-item .arrow{color:var(--ink2);transition:.3s}
.news-item:hover .arrow{transform:translateX(6px);color:var(--accent)}

/* contact */
.form{max-width:760px;margin:0 auto;display:grid;gap:20px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.form label{display:flex;flex-direction:column;gap:8px;font-size:13px;letter-spacing:2px;color:rgba(255,255,255,.7)}
.form input,.form select,.form textarea{background:transparent;border:1px solid rgba(255,255,255,.25);color:#fff;padding:13px 16px;font-size:14px;font-family:var(--sans);transition:.3s;resize:vertical}
.form select option{color:#111}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--accent)}
.form .btn{justify-self:center;margin-top:8px;border:0}
.form-tip{color:var(--accent);text-align:center;font-size:14px;min-height:22px;letter-spacing:1px}
.contact-info{max-width:760px;margin:56px auto 0;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;text-align:center;border-top:1px solid rgba(255,255,255,.12);padding-top:40px}
.contact-info span{font-size:12px;letter-spacing:3px;color:rgba(255,255,255,.5)}
.contact-info p{margin-top:8px;font-size:15px}

/* footer */
.footer{background:var(--dark2);color:rgba(255,255,255,.5);padding:40px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer nav{display:flex;gap:24px}
.footer a:hover{color:#fff}
.footer p{font-size:12px;letter-spacing:1px}

/* reveal */
.reveal{opacity:0;transform:translateY(36px);transition:.9s cubic-bezier(.2,.6,.2,1)}
.reveal.on{opacity:1;transform:none}

/* responsive */
@media(max-width:960px){
  .case-grid,.svc-grid,.team-grid,.why-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:36px}
  .menu{position:fixed;inset:0;background:rgba(10,10,10,.96);flex-direction:column;justify-content:center;gap:32px;transform:translateY(-100%);transition:.5s;z-index:99}
  .menu.open{transform:none}
  .menu a{font-size:18px;color:#fff !important}
  .burger{display:block;position:relative;z-index:101}
  .menu.open ~ .burger span{background:#fff !important}
}
@media(max-width:600px){
  .case-grid,.svc-grid,.team-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .news-item{grid-template-columns:1fr;gap:8px}
  .contact-info{grid-template-columns:1fr}
  .section{padding:80px 0}
}