/* ============================================================
   LiveArt 2018 / 立雅展览 — Light Corporate System
   White surfaces · blue structural lines · orange highlight.
   Class names preserved from the original markup.
   ============================================================ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

:root{
  /* brand */
  --blue:#1668c9; --blue-dark:#0f4ea8; --blue-light:#3f88e2; --blue-50:#eaf2fc;
  --orange:#e8741c; --orange-dark:#c85f10; --orange-light:#f08c3e; --orange-50:#fdeede;

  /* neutrals */
  --ink:#23292f; --ink-soft:#3a414a; --text:#4a525c; --muted:#7a828d; --muted-2:#a2a9b3;
  --bg:#ffffff; --bg-soft:#f5f7fb; --bg-soft-2:#eaeff6; --line:#e3e8f0;

  /* legacy names remapped to the light palette (keeps inline styles working) */
  --navy-950:#1b2430; --navy-900:#23292f; --navy-800:#3a414a; --navy-700:#4a525c;
  --navy-600:#5a626c; --navy-500:#7a828d;
  --slate-400:#8a93a3; --slate-300:#aab3c2; --slate-200:#e3e8f0; --slate-100:#f5f7fb;
  --white:#ffffff; --white-pure:#ffffff;

  --container:1200px; --nav-h:92px;
  --radius:4px; --radius-lg:6px;
  --ease:cubic-bezier(.22,.61,.36,1); --ease-out:cubic-bezier(.16,1,.3,1);
  --shadow-sm:0 1px 2px rgba(35,41,47,.06);
  --shadow-md:0 12px 30px -14px rgba(35,41,47,.22);
  --shadow-lg:0 26px 60px -24px rgba(35,41,47,.3);

  --font-display:'Archivo','Noto Sans SC',system-ui,sans-serif;
  --font-body:'Noto Sans SC','Archivo',system-ui,-apple-system,sans-serif;
  --font-mono:'Space Mono','SFMono-Regular',ui-monospace,monospace;
}

html{scroll-behavior:smooth}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--blue);color:#fff}
img{max-width:100%}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;letter-spacing:-.02em;line-height:1.1;color:var(--ink)}
h2{font-size:clamp(1.8rem,4vw,2.7rem)}
h3{font-size:clamp(1.15rem,2vw,1.5rem)}

/* blueprint annotation label (now blue) */
.section-label{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.18em;color:var(--blue);margin-bottom:16px}
.section-label::before{content:'';width:28px;height:2px;background:var(--blue)}

/* ===== NAV ===== */
nav{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:1000;
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:0 clamp(1.25rem,4vw,3rem);
  background:#fff;border-bottom:1px solid var(--line);
  transition:box-shadow .35s var(--ease);
}
nav.scrolled{box-shadow:0 6px 24px -10px rgba(35,41,47,.18)}
.nav-logo{display:flex;align-items:center;text-decoration:none;height:64px;flex-shrink:0}
.nav-logo img{height:100%;width:auto}
.nav-links{display:flex;height:100%;list-style:none;align-items:stretch}
.nav-links li{display:flex}
.nav-links a{display:flex;align-items:center;height:100%;padding:0 18px;color:var(--ink-soft);text-decoration:none;font-size:.9rem;font-weight:500;transition:color .25s,background .25s;position:relative}
.nav-links a::after{content:'';position:absolute;left:18px;right:18px;bottom:0;height:3px;background:var(--blue);transform:scaleX(0);transition:transform .3s var(--ease)}
.nav-links a:hover{color:var(--blue)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{background:var(--orange);color:#fff}
.nav-links a.active::after{display:none}
/* contact button keeps a distinct (blue) treatment */
.nav-cta{background:var(--blue)!important;color:#fff!important;padding:0 22px!important;font-weight:700!important;margin-left:6px}
.nav-cta::after{display:none!important}
.nav-cta:hover{background:var(--blue-dark)!important;color:#fff!important}
.nav-cta.active{background:var(--orange)!important}
/* language switch */
.nav-lang{display:flex;align-items:center;gap:7px;font-size:.82rem;font-weight:600;flex-shrink:0}
.nav-lang .active{color:var(--blue)}
.nav-lang span:not(.active){color:var(--muted-2)}
.nav-lang .sep{color:var(--line)}
.nav-hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;z-index:1001}
.nav-hamburger span{display:block;width:26px;height:2px;background:var(--ink);transition:.3s var(--ease)}
.nav-hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-hamburger.active span:nth-child(2){opacity:0}
.nav-hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
/* dropdown (关于我们) */
.nav-dropdown{position:relative;display:flex}
.nav-dropdown>a .caret{font-size:.6em;margin-left:5px;transition:transform .25s var(--ease)}
.nav-dropdown:hover>a .caret{transform:rotate(180deg)}
.nav-dropdown-menu{position:absolute;top:100%;left:0;min-width:184px;background:#fff;border:1px solid var(--line);border-top:2px solid var(--orange);box-shadow:var(--shadow-md);list-style:none;padding:6px 0;margin:0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .25s var(--ease);z-index:50}
.nav-dropdown:hover .nav-dropdown-menu{opacity:1;visibility:visible;transform:none}
.nav-dropdown-menu li{display:block}
.nav-dropdown-menu a{display:block;height:auto;padding:11px 20px;color:var(--ink-soft);font-size:.86rem;white-space:nowrap;background:none}
.nav-dropdown-menu a::after{display:none}
.nav-dropdown-menu a:hover{background:var(--bg-soft);color:var(--blue)}

/* ===== HERO (full-width banner strip, blue-framed) ===== */
.hero{position:relative;margin-top:var(--nav-h);height:clamp(460px,50vw,680px);background:var(--ink);overflow:hidden}
.hero-carousel{position:absolute;inset:0;z-index:0}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s var(--ease-out)}
.hero-slide.active{opacity:1}
.hero-slide-bg{position:absolute;inset:0}
.hero-slide-bg img,.hero-slide-bg video{width:100%;height:100%;object-fit:cover}
.hero-slide-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,25,34,.84) 0%,rgba(18,25,34,.52) 38%,rgba(18,25,34,.08) 68%,transparent 100%)}
.hero-content{display:none}
/* banner promo text */
.hero-slide-content{position:absolute;inset:0;z-index:2;display:flex;align-items:center}
.hero-slide-text{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(1.5rem,4vw,3rem)}
.hero-slide-text .slide-label{display:inline-flex;align-items:center;font-family:var(--font-mono);font-size:.7rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#fff;background:var(--orange);padding:6px 14px;border-radius:var(--radius);margin-bottom:18px;opacity:0;transform:translateY(10px);transition:all .5s var(--ease-out) .2s}
.hero-slide.active .hero-slide-text .slide-label{opacity:1;transform:none}
.hero-slide-text h2{font-family:var(--font-display);font-weight:900;font-size:clamp(2rem,4.6vw,3.6rem);color:#fff;line-height:1.08;letter-spacing:-.02em;margin-bottom:16px;text-shadow:0 2px 24px rgba(0,0,0,.35);opacity:0;transform:translateY(14px);transition:all .55s var(--ease-out) .35s}
.hero-slide.active .hero-slide-text h2{opacity:1;transform:none}
.hero-slide-text h2 span{color:var(--orange-light)}
.hero-slide-text p{font-size:clamp(.92rem,1.3vw,1.08rem);color:rgba(255,255,255,.85);line-height:1.7;max-width:520px;margin-bottom:26px;text-shadow:0 1px 12px rgba(0,0,0,.3);opacity:0;transform:translateY(14px);transition:all .55s var(--ease-out) .5s}
.hero-slide.active .hero-slide-text p{opacity:1;transform:none}
.hero-slide-text .slide-cta{display:inline-flex;align-items:center;gap:8px;background:var(--orange);color:#fff;text-decoration:none;padding:13px 28px;border-radius:var(--radius);font-weight:700;font-size:.9rem;opacity:0;transform:translateY(14px);transition:all .55s var(--ease-out) .65s,background .3s,box-shadow .3s}
.hero-slide.active .hero-slide-text .slide-cta{opacity:1;transform:none}
.hero-slide-text .slide-cta:hover{background:var(--orange-dark);box-shadow:0 10px 26px -10px rgba(232,116,28,.7)}
.hero-carousel-controls{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);z-index:5;display:flex;gap:9px;align-items:center}
.carousel-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.45);border:none;cursor:pointer;transition:all .3s var(--ease);padding:0}
.carousel-dot.active{background:var(--orange);width:26px;border-radius:5px}
.carousel-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:1.1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s var(--ease);backdrop-filter:blur(4px)}
.carousel-arrow:hover{background:var(--orange);border-color:var(--orange)}
.carousel-arrow.prev{left:clamp(1rem,3vw,2rem)}
.carousel-arrow.next{right:clamp(1rem,3vw,2rem)}

/* ===== STAT STRIP ===== */
.stat-strip{background:#fff;border-bottom:1px solid var(--line)}
.stat-strip-inner{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr)}
.stat-strip .hero-stat{padding:26px 20px;text-align:center;border-right:1px solid var(--line)}
.stat-strip .hero-stat:last-child{border-right:none}
.stat-strip .hero-stat h4{font-family:var(--font-display);font-weight:900;font-size:clamp(1.7rem,2.6vw,2.3rem);color:var(--ink);letter-spacing:-.02em}
.stat-strip .hero-stat h4 span{color:var(--orange)}
.stat-strip .hero-stat p{font-family:var(--font-mono);color:var(--muted);font-size:.7rem;margin-top:6px;letter-spacing:.05em;text-transform:uppercase}

/* ===== GROUP OVERVIEW (公司概况) ===== */
.overview{background:#fff}
.overview-grid{display:grid;grid-template-columns:1fr 1.12fr;gap:clamp(36px,6vw,64px);align-items:center}
.overview-text h2{margin-bottom:18px}
.overview-text>p{color:var(--text);font-size:.97rem;line-height:1.95;margin-bottom:16px}
.overview-text .btn{margin-top:10px}
.overview-media{position:relative}
.ov-carousel{position:relative;aspect-ratio:16/10;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);z-index:1}
.ov-carousel img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .9s var(--ease)}
.ov-carousel img.active{opacity:1}
.ov-dots{position:absolute;left:0;right:0;bottom:14px;z-index:3;display:flex;gap:7px;justify-content:center}
.ov-dots button{width:8px;height:8px;border-radius:50%;border:none;background:rgba(255,255,255,.55);cursor:pointer;padding:0;transition:all .3s}
.ov-dots button.active{background:#fff;width:22px;border-radius:4px}
.overview-media::before{content:'';position:absolute;left:24px;top:24px;right:-24px;bottom:-24px;border:2px solid var(--blue);border-radius:var(--radius);z-index:0}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:var(--radius);font-weight:700;font-size:.88rem;text-decoration:none;transition:all .3s var(--ease);border:none;cursor:pointer}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px);box-shadow:0 10px 26px -10px rgba(232,116,28,.6)}
.btn-outline{background:transparent;color:var(--blue);border:1.5px solid var(--blue)}
.btn-outline:hover{background:var(--blue);color:#fff}

/* ===== PAGE HERO (subpages) ===== */
.page-hero{position:relative;background:var(--bg-soft);border-bottom:1px solid var(--line);padding:calc(var(--nav-h) + 3rem) clamp(1.5rem,4vw,3rem) 3rem;color:var(--ink)}
.page-hero h1{font-size:clamp(2rem,4.5vw,3rem);margin-bottom:10px;color:var(--ink)}
.page-hero p{color:var(--muted);font-size:.97rem;max-width:600px}

section{padding:clamp(3.5rem,8vh,5.5rem) clamp(1.5rem,4vw,3rem)}
section[id]{scroll-margin-top:calc(var(--nav-h) + 10px)}
.section-inner{max-width:var(--container);margin:0 auto}

/* ===== MEDIA HERO (image banner for subpages) ===== */
.media-hero{position:relative;margin-top:var(--nav-h);height:clamp(300px,34vw,460px);background:var(--ink);overflow:hidden}
.media-hero-bg{position:absolute;inset:0}
.media-hero-bg img{width:100%;height:100%;object-fit:cover}
.media-hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,rgba(18,25,34,.8) 0%,rgba(18,25,34,.45) 50%,rgba(18,25,34,.18) 100%)}
.media-hero-content{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:center;max-width:var(--container);margin:0 auto;padding:0 clamp(1.5rem,4vw,3rem)}
.media-hero-content .section-label{color:var(--orange-light);opacity:.7;text-shadow:0 1px 10px rgba(0,0,0,.5)}
.media-hero-content .section-label::before{background:var(--orange-light)}
.media-hero-content h1{font-size:clamp(1.8rem,3.6vw,2.9rem);color:#fff;opacity:.8;line-height:1.28;margin-bottom:16px;max-width:820px;text-shadow:0 2px 18px rgba(0,0,0,.55)}
.media-hero-content .mh-sub{font-size:clamp(1.15rem,2.1vw,1.6rem);font-weight:700;color:#f5872e;opacity:.8;letter-spacing:.02em;margin-bottom:20px;
  text-shadow:-1.5px 0 0 #fff,1.5px 0 0 #fff,0 -1.5px 0 #fff,0 1.5px 0 #fff,-1px -1px 0 #fff,1px -1px 0 #fff,-1px 1px 0 #fff,1px 1px 0 #fff,0 3px 12px rgba(0,0,0,.45)}
/* 流程示意 */
.hero-flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px 6px}
.flow-step{display:inline-flex;align-items:center;gap:8px;padding:7px 15px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.28);border-radius:100px;color:#fff;font-size:.85rem;font-weight:500;backdrop-filter:blur(3px)}
.flow-step i{font-family:var(--font-mono);font-style:normal;font-size:.72rem;font-weight:700;color:var(--orange-light)}
.flow-sep{color:rgba(255,255,255,.5);font-size:.95rem;padding:0 2px}
@media(max-width:560px){.flow-sep{display:none}.hero-flow{gap:8px}}

/* ===== ABOUT HERO (video banner) ===== */
.about-hero{position:relative;margin-top:var(--nav-h);height:clamp(360px,40vw,540px);background:var(--ink);overflow:hidden}
.about-hero-bg{position:absolute;inset:0}
.about-hero-bg video{width:100%;height:100%;object-fit:cover}
.about-hero-content{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;justify-content:center;max-width:var(--container);margin:0 auto;padding:0 clamp(1.5rem,4vw,3rem)}
.about-hero-content .section-label{color:var(--orange-light);text-shadow:0 1px 10px rgba(0,0,0,.6)}
.about-hero-content .section-label::before{background:var(--orange-light)}
.about-hero-content h1{font-size:clamp(2rem,4.5vw,3.2rem);color:#fff;margin-bottom:10px;text-shadow:0 2px 18px rgba(0,0,0,.7)}
.about-hero-content .ah-sub{font-size:clamp(1.05rem,1.9vw,1.45rem);color:#fff;font-weight:600;margin-bottom:16px;text-shadow:0 2px 14px rgba(0,0,0,.65)}
.about-hero-content p{color:#fff;font-size:clamp(.92rem,1.3vw,1.05rem);line-height:1.7;max-width:600px;text-shadow:0 1px 12px rgba(0,0,0,.7)}

/* ===== SERVICES ===== */
#services{background:var(--bg-soft)}
.services-header{text-align:center;margin-bottom:48px}
.services-header .section-label{justify-content:center}
.services-header p{color:var(--muted);font-size:1rem;margin-top:12px;max-width:560px;margin-inline:auto}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.service-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;transition:all .35s var(--ease);overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--blue);transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.service-card:hover::before{transform:scaleX(1)}
.service-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:var(--blue-light)}
.service-icon{width:100%;aspect-ratio:4/3;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;margin-bottom:20px;background:var(--bg-soft);overflow:hidden}
.service-icon img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.service-card:hover .service-icon img{transform:scale(1.05)}
.service-card h3{font-size:1.15rem;margin-bottom:12px;color:var(--ink)}
.service-card p{color:var(--text);font-size:.88rem;line-height:1.8}
/* service big-image feature rows */
.services-features{display:flex;flex-direction:column;gap:clamp(44px,6vw,84px)}
.service-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,60px);align-items:center}
.service-feature-img{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:4/3;background:var(--bg-soft)}
.service-feature-img img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.service-feature:hover .service-feature-img img{transform:scale(1.04)}
.service-feature:nth-child(even) .service-feature-img{order:2}
.service-feature-body h3{font-size:clamp(1.4rem,2.4vw,2rem);color:var(--ink);margin:6px 0 14px}
.service-feature-body .lead{color:var(--text);font-size:.97rem;line-height:1.9;margin-bottom:20px}
.service-feature-body ul{list-style:none;display:grid;gap:11px}
.service-feature-body ul li{position:relative;padding-left:22px;color:var(--ink-soft);font-size:.9rem}
.service-feature-body ul li::before{content:'';position:absolute;left:0;top:.5em;width:8px;height:8px;background:var(--orange);border-radius:2px}
@media(max-width:768px){.service-feature{grid-template-columns:1fr;gap:20px}.service-feature:nth-child(even) .service-feature-img{order:0}}

/* ===== ABOUT ===== */
#about{background:#fff}
.about-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(40px,6vw,64px);align-items:center}
.factory-badge{display:inline-flex;align-items:center;gap:14px;background:var(--blue-50);border:1px solid #cfe0f6;padding:16px 22px;border-radius:var(--radius);margin-top:22px}
.factory-badge-num{font-family:var(--font-display);font-weight:900;font-size:2rem;color:var(--blue);line-height:1}
.factory-badge-text{font-size:.82rem;color:var(--text);line-height:1.5}
.about-text h2{margin-bottom:22px}
.about-text p{color:var(--text);font-size:.96rem;line-height:1.9;margin-bottom:16px}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.about-feat{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--ink-soft)}
.about-feat .check{width:20px;height:20px;background:var(--blue);border-radius:2px;display:flex;align-items:center;justify-content:center;font-size:.6rem;color:#fff;flex-shrink:0}
.factory-scale{width:100%;aspect-ratio:4/3;background:linear-gradient(135deg,var(--blue-50),#dbe9fa);border-radius:var(--radius);position:relative;overflow:hidden;border:1px solid #cfe0f6}
.factory-scale-inner{position:absolute;inset:11%;border:2px dashed var(--blue-light);border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center}
.factory-scale-inner .num{font-family:var(--font-display);font-weight:900;font-size:clamp(3rem,6vw,4.5rem);color:var(--blue);line-height:1}
.factory-scale-inner .unit{font-family:var(--font-mono);color:var(--muted);font-size:.82rem;margin-top:10px;letter-spacing:.18em;text-transform:uppercase}
.factory-scale-dots{position:absolute;width:100%;height:100%;background-image:radial-gradient(circle,rgba(22,104,201,.12) 1px,transparent 1px);background-size:22px 22px}

/* ===== WHY US ===== */
#why-us{background:var(--bg-soft)}
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin-top:48px}
.why-card{position:relative;background:#fff;padding:32px 26px;border-radius:var(--radius);border:1px solid var(--line);transition:all .35s var(--ease);overflow:hidden}
.why-card::before{content:'';position:absolute;top:0;left:0;width:0;height:3px;background:var(--orange);transition:width .45s var(--ease)}
.why-card:hover::before{width:100%}
.why-card:hover{border-color:var(--blue-light);box-shadow:var(--shadow-md);transform:translateY(-4px)}
.why-card-icon{width:100%;aspect-ratio:4/3;border-radius:var(--radius);background:var(--bg-soft);display:flex;align-items:center;justify-content:center;margin-bottom:18px;overflow:hidden}
.why-card-icon img{width:100%;height:100%;object-fit:cover}
.why-card h3{font-size:1.1rem;margin-bottom:10px;color:var(--ink)}
.why-card p{color:var(--text);font-size:.88rem;line-height:1.8}

/* ===== CASES ===== */
#cases{background:#fff}
.cases-header{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:44px;flex-wrap:wrap;gap:16px}
.cases-filter{display:flex;gap:8px;flex-wrap:wrap}
.filter-btn{font-family:var(--font-mono);padding:8px 18px;border-radius:var(--radius);border:1px solid var(--line);background:#fff;color:var(--muted);font-size:.74rem;font-weight:700;letter-spacing:.03em;cursor:pointer;transition:all .3s}
.filter-btn:hover,.filter-btn.active{border-color:var(--orange);color:#fff;background:var(--orange)}
.cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.case-card{position:relative;background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:all .35s var(--ease);cursor:pointer;text-decoration:none;display:block;color:inherit}
.case-card:hover{transform:translateY(-5px);border-color:var(--blue-light);box-shadow:var(--shadow-md)}
.case-thumb{aspect-ratio:16/10;position:relative;overflow:hidden;background:var(--bg-soft)}
.case-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.case-card:hover .case-thumb img{transform:scale(1.06)}
.case-thumb-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(27,36,48,.5),transparent 55%);opacity:0;transition:opacity .35s}
.case-card:hover .case-thumb-overlay{opacity:1}
.case-category{position:absolute;top:14px;left:14px;padding:5px 11px;border-radius:var(--radius);background:var(--orange);color:#fff;font-family:var(--font-mono);font-size:.64rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.case-info{padding:22px}
.case-info h4{font-size:1rem;margin-bottom:8px;color:var(--ink)}
.case-info p{color:var(--muted);font-size:.82rem;line-height:1.6}
.case-more{text-align:center;margin-top:44px}

/* ===== CONTACT ===== */
#contact{background:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,6vw,64px);margin-top:44px}
.contact-info h3{font-size:1.45rem;margin-bottom:16px;color:var(--ink)}
.contact-info p{color:var(--text);font-size:.92rem;line-height:1.8;margin-bottom:32px}
.contact-details{display:flex;flex-direction:column;gap:20px}
.contact-item{display:flex;align-items:flex-start;gap:16px}
.contact-item-icon{width:44px;height:44px;background:var(--blue-50);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0}
.contact-item-label{font-family:var(--font-mono);font-size:.66rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em;color:var(--muted);margin-bottom:5px}
.contact-item-value{font-weight:600;font-size:.94rem;color:var(--ink)}
.contact-wechat{display:inline-flex;align-items:center;gap:12px;background:var(--blue);color:#fff;padding:15px 22px;border-radius:var(--radius);margin-top:24px;font-weight:600;font-size:.88rem}
.contact-form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow-sm)}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:.82rem;font-weight:600;margin-bottom:8px;color:var(--ink)}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:12px 15px;border:1.5px solid var(--line);border-radius:var(--radius);font-family:inherit;font-size:.88rem;transition:border-color .3s,box-shadow .3s;background:#fff;color:var(--ink)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(22,104,201,.12)}
.form-group textarea{resize:vertical;min-height:100px}
.form-submit{width:100%;padding:14px;background:var(--orange);color:#fff;border:none;border-radius:var(--radius);font-weight:700;font-size:.95rem;cursor:pointer;transition:all .3s;font-family:inherit}
.form-submit:hover{background:var(--orange-dark);transform:translateY(-1px);box-shadow:0 10px 24px -10px rgba(232,116,28,.5)}
/* location map */
.map-section{background:var(--bg-soft);border-top:1px solid var(--line)}
.map-head{text-align:center;margin-bottom:36px}
.map-head .section-label{justify-content:center}
.map-head p{color:var(--muted);margin-top:10px;font-size:.95rem}
.map-frame{position:relative;max-width:var(--container);margin:0 auto;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);background:#fff}
.map-frame iframe{display:block;width:100%;height:440px;border:0;filter:grayscale(.15)}
.map-pin{position:absolute;left:24px;bottom:24px;z-index:2;background:#fff;border-left:3px solid var(--orange);border-radius:var(--radius);box-shadow:var(--shadow-md);padding:16px 20px;max-width:300px}
.map-pin h4{font-size:1rem;margin-bottom:6px;color:var(--ink)}
.map-pin p{font-size:.84rem;color:var(--muted);line-height:1.6}
.map-link{display:inline-flex;align-items:center;gap:5px;margin-top:12px;font-size:.82rem;font-weight:700;color:var(--orange);text-decoration:none;transition:color .25s}
.map-link:hover{color:var(--orange-dark)}
@media(max-width:640px){.map-frame iframe{height:340px}.map-pin{position:static;max-width:none;border-radius:0;box-shadow:none;border-left:0;border-top:1px solid var(--line)}}

/* ===== FOOTER (light) ===== */
footer{background:var(--bg-soft);color:var(--muted);border-top:1px solid var(--line)}
.footer-top{max-width:var(--container);margin:0 auto;display:grid;grid-template-columns:1.8fr 1fr 1fr 1fr 1.3fr;gap:clamp(24px,3vw,40px);padding:clamp(2.5rem,5vw,4rem) clamp(1.5rem,4vw,3rem) clamp(2rem,4vw,3rem)}
.footer-logo{display:inline-flex;height:46px;margin-bottom:16px}
.footer-logo img{height:100%;width:auto}
.footer-desc{font-size:.85rem;color:var(--muted);line-height:1.85;max-width:330px}
.footer-col h4{font-size:.8rem;color:var(--ink);margin-bottom:16px;font-weight:700}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px;margin:0}
.footer-col ul li{font-size:.84rem;color:var(--muted);line-height:1.5}
.footer-col a{color:var(--muted);text-decoration:none;transition:color .25s}
.footer-col a:hover{color:var(--blue)}
.footer-bottom{border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;max-width:var(--container);margin:0 auto;padding:18px clamp(1.5rem,4vw,3rem)}
.footer-bottom p{font-family:var(--font-mono);font-size:.72rem;color:var(--muted-2);margin:0}
.footer-sites a{color:var(--muted-2);text-decoration:none;transition:color .25s}
.footer-sites a:hover{color:var(--blue)}
@media(max-width:860px){.footer-top{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}.footer-bottom{justify-content:center;text-align:center}}
@media(max-width:480px){.footer-top{grid-template-columns:1fr}}

/* ===== NEWS ===== */
#news{background:var(--bg-soft)}
.news-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:22px;margin-top:44px}
.news-card{position:relative;background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:all .35s var(--ease);text-decoration:none;display:block;color:inherit}
.news-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--blue);transform:scaleY(0);transform-origin:top;transition:transform .4s var(--ease)}
.news-card:hover::before{transform:scaleY(1)}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--blue-light)}
.news-cover{aspect-ratio:16/10;overflow:hidden;background:var(--bg-soft)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .news-cover img{transform:scale(1.05)}
.news-header{padding:24px 24px 0}
.news-date{font-family:var(--font-mono);font-size:.72rem;color:var(--muted);margin-bottom:10px;letter-spacing:.03em}
.news-card h3{font-size:1.05rem;margin-bottom:8px;color:var(--ink)}
.news-card p{color:var(--text);font-size:.82rem;line-height:1.7;padding:0 24px 22px}
.news-tag{display:inline-block;padding:3px 10px;border-radius:var(--radius);background:var(--blue-50);color:var(--blue-dark);font-family:var(--font-mono);font-size:.66rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}

/* ===== SCROLL REVEAL ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.reveal.visible{opacity:1;transform:translateY(0)}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulseDot{0%,100%{opacity:1}50%{opacity:.4}}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* ===== RESPONSIVE ===== */
@media(max-width:860px){
  .nav-lang{display:none}
  .nav-links{position:fixed;top:0;left:0;right:0;bottom:0;height:100vh;background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:6px;opacity:0;pointer-events:none;transition:opacity .35s var(--ease)}
  .nav-links.open{opacity:1;pointer-events:all}
  .nav-links li{width:auto}
  .nav-links a{height:auto;font-size:1.2rem;padding:14px 24px}
  .nav-links a.active,.nav-cta{border-radius:var(--radius)}
  .nav-cta{margin-left:0!important;padding:14px 28px!important}
  .nav-dropdown{flex-direction:column;align-items:center}
  .nav-dropdown>a .caret{display:none}
  .nav-dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;border:none;box-shadow:none;background:transparent;padding:0;min-width:0;text-align:center}
  .nav-dropdown-menu a{color:var(--muted);font-size:1rem;padding:9px}
  .nav-hamburger{display:flex}
  .stat-strip-inner{grid-template-columns:1fr 1fr}
  .stat-strip .hero-stat:nth-child(2){border-right:none}
  .stat-strip .hero-stat{border-bottom:1px solid var(--line)}
  .overview-grid{grid-template-columns:1fr;gap:48px}
  .overview-media::before{display:none}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-features{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr;gap:36px}
  .contact-form{padding:24px}
  .cases-grid{grid-template-columns:1fr}
  .services-grid{grid-template-columns:1fr 1fr}
  .cases-header{align-items:flex-start}
}
@media(max-width:480px){
  .services-grid{grid-template-columns:1fr}
  .stat-strip-inner{grid-template-columns:1fr 1fr}
}