/* ============================================================
   LCCFAIR 岚畅 主题样式 v2
   品牌色: 深蓝 #001e40 / 亮蓝 #175ead / 浅灰 #f6f8fb / 白 #fff
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter','PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.7;color:#1a1a2e;background:#fff;overflow-x:hidden;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:#175ead;text-decoration:none;transition:color .2s}
a:hover{color:#001e40}

/* ===== Container ===== */
.container{max-width:1280px;margin:0 auto;padding:0 40px}

/* ===== Section ===== */
.section{padding:120px 0}
.section-sm{padding:80px 0}
.section-header{text-align:center;margin-bottom:64px}
.section-header h2{font-size:clamp(1.75rem,3.5vw,2.75rem);font-weight:700;color:#001e40;letter-spacing:-.01em}
.section-header p{font-size:1.1rem;color:#6b7280;margin-top:12px;max-width:560px;margin-inline:auto}
.section-header.light h2,.section-header.light p{color:#fff}
.section-footer{text-align:center;margin-top:56px}
.bg-light{background:#f6f8fb}
.bg-dark{background:#001e40}
.bg-primary{background:#175ead}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 36px;font-size:1rem;font-weight:600;border-radius:8px;cursor:pointer;transition:all .25s;border:none;text-decoration:none}
.btn-primary{background:#175ead;color:#fff}
.btn-primary:hover{background:#0f4a8a;color:#fff;transform:translateY(-1px);box-shadow:0 8px 24px rgba(23,94,173,.3)}
.btn-white{background:#fff;color:#175ead}
.btn-white:hover{background:#f0f4ff;transform:translateY(-1px)}
.btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:#fff;color:#fff}
.btn-outline-sm{padding:10px 24px;font-size:.9rem;font-weight:600;border-radius:6px;color:#175ead;border:1.5px solid #175ead;transition:all .2s;display:inline-block;text-align:center}
.btn-outline-sm:hover{background:#175ead;color:#fff}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);backdrop-filter:blur(16px);border-bottom:1px solid #eef0f3;transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.06)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{font-size:1.5rem;font-weight:800;color:#001e40;letter-spacing:-.02em}
.logo-sub{color:#175ead;font-weight:600;font-size:1.5rem;margin-left:2px}
.main-nav{display:flex;gap:36px}
.main-nav .nav-link{font-size:.95rem;color:#4b5563;font-weight:500;position:relative;padding:6px 0;transition:color .2s}
.main-nav .nav-link:hover,.main-nav .nav-link.active{color:#175ead}
.main-nav .nav-link.active::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;background:#175ead;border-radius:1px}
.header-actions{display:flex;align-items:center;gap:16px}

/* Mobile Menu */
.menu-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;width:24px;height:2px;background:#001e40;transition:all .3s;border-radius:1px}
.mobile-menu{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;padding:16px 40px 24px;flex-direction:column;gap:4px;box-shadow:0 12px 32px rgba(0,0,0,.08);border-bottom:1px solid #eef0f3}
.mobile-menu.open{display:flex}
.mobile-nav-link{font-size:1.05rem;color:#333;font-weight:500;padding:12px 0;border-bottom:1px solid #f3f4f6}

/* Language Switcher */
.lang-switch{position:relative}
.lang-globe{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;transition:background .2s}
.lang-globe:hover{background:#f0f3f7}
.lang-drop{width:auto!important;min-width:150px!important;overflow:visible;padding:6px 0!important;white-space:nowrap;text-align:center}
.lang-drop *{text-align:center!important;box-sizing:border-box}
.lang-drop ul{list-style:none;padding:0;margin:0;text-align:center}
.lang-drop ul li{list-style:none;padding:0;margin:0;text-align:center;display:block}
.lang-drop ul li::before{display:none!important;content:none!important}
.lang-drop ul li a{display:block;padding:12px 20px;font-size:.9rem;color:#333;text-decoration:none;white-space:nowrap;transition:background .15s;line-height:1.5;text-align:center}
.lang-drop ul li a:hover{background:#f0f4ff;color:#175ead}
.lang-drop ul li.current-lang a{color:#175ead;font-weight:600;background:#f6f8fb}
.mobile-menu .lang-switch{display:flex;align-items:center;gap:8px;padding:12px 0;border-bottom:1px solid #f3f4f6}
.mobile-menu .lang-switch a{padding:6px 14px;font-size:.9rem;color:#4b5563;border-radius:6px;border:1px solid #e0e3e8;text-decoration:none;transition:all .2s}
.mobile-menu .lang-switch a:hover,.mobile-menu .lang-switch a.current-lang{background:#175ead;color:#fff;border-color:#175ead}

/* ===== Hero ===== */
.hero-carousel{position:relative;width:100%;height:850px;overflow:hidden;background:#00141e}
.hero-slider{display:flex;height:100%;transition:transform .7s cubic-bezier(.4,0,.2,1)}
.hero-slide{min-width:100%;height:100%;display:flex;align-items:center;position:relative;overflow:hidden}
.hero-slide .hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;z-index:0}
.hero-slide:nth-child(1){background:linear-gradient(135deg,#001428 0%,#001e40 40%,#0a3058 100%)}
.hero-slide:nth-child(2){background:linear-gradient(135deg,#0a1f35 0%,#123456 50%,#1a4a70 100%)}
.hero-slide:nth-child(3){background:linear-gradient(135deg,#001020 0%,#0d2845 60%,#153860 100%)}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,20,40,.3),rgba(0,20,40,.5));z-index:1}
.hero-content{position:relative;z-index:2;max-width:1280px;margin:0 auto;padding:0 40px;width:100%}
.hero-content h1{font-size:clamp(2rem,5vw,4rem);font-weight:800;color:#fff;line-height:1.1;letter-spacing:-.02em;max-width:720px;margin-bottom:20px}
.hero-content p{font-size:clamp(1.05rem,1.8vw,1.3rem);color:rgba(255,255,255,.85);line-height:1.6;max-width:560px;margin-bottom:40px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-dots{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:2}
.hero-dots span{width:12px;height:12px;border-radius:50%;background:rgba(255,255,255,.35);cursor:pointer;transition:all .3s}
.hero-dots span.active{background:#fff;transform:scale(1.2)}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:2;background:rgba(255,255,255,.1);backdrop-filter:blur(4px);color:#fff;border:1px solid rgba(255,255,255,.15);width:48px;height:48px;border-radius:50%;font-size:1.2rem;cursor:pointer;transition:all .3s;display:flex;align-items:center;justify-content:center}
.hero-arrow:hover{background:rgba(255,255,255,.25)}
.hero-prev{left:24px}
.hero-next{right:24px}

/* ===== Intro ===== */
.intro .intro-text{max-width:760px;margin:0 auto;text-align:center}
.intro .section-label{display:inline-block;font-size:.8rem;font-weight:700;color:#175ead;text-transform:uppercase;letter-spacing:.12em;margin-bottom:16px}
.intro .intro-text h2{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;color:#001e40;margin-bottom:20px;letter-spacing:-.01em}
.intro .intro-text p{font-size:1.1rem;color:#4b5563;line-height:1.85}

/* ===== Card Grid ===== */
.card-grid{display:grid;gap:28px}
.col-4{grid-template-columns:repeat(4,1fr)}
.col-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border-radius:14px;overflow:hidden;transition:transform .3s,box-shadow .3s;border:1px solid #eef0f3;display:flex;flex-direction:column}
.card:hover{transform:translateY(-6px);box-shadow:0 20px 48px rgba(0,0,0,.08)}
.card-img{aspect-ratio:1;overflow:hidden;background:#f0f3f7;flex-shrink:0}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-img img{transform:scale(1.05)}
.card-body{padding:28px 24px 32px;display:flex;flex-direction:column;gap:8px;flex:1}
.card-body h3{font-size:1.15rem;font-weight:600;color:#001e40;margin-bottom:4px;letter-spacing:-.01em}
.card-body p{font-size:.9rem;color:#6b7280;line-height:1.6;flex:1;margin-bottom:4px}
.card-tag{display:inline-block;font-size:.72rem;font-weight:700;color:#175ead;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.read-more{display:inline-flex;align-items:center;gap:6px;font-size:.9rem;font-weight:600;color:#175ead;margin-top:auto;padding-top:10px;transition:gap .2s}
.read-more:hover{gap:12px}
.btn-outline-sm{margin-top:auto;align-self:flex-start}

/* Solution cards */
.solution-card{position:relative;aspect-ratio:3/4;border:none;display:block}
.solution-card .card-img{height:100%;aspect-ratio:auto}
.solution-card .card-body{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.85));padding:36px 24px 28px;border:none;display:block}
.solution-card .card-body h3{color:#fff;font-size:1.25rem}
.solution-card .card-body p{color:rgba(255,255,255,.75)}
.solution-card .card-arrow{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:rgba(255,255,255,.15);color:#fff;font-size:1rem;margin-top:12px;transition:background .3s}
.solution-card:hover .card-arrow{background:rgba(255,255,255,.3)}

/* Case cards */
.case-card .card-img{aspect-ratio:3/2}

/* News cards */
.news-card .card-img{aspect-ratio:16/10}
.news-card time{display:block;font-size:.8rem;color:#175ead;font-weight:600;margin-bottom:6px}

/* Advantage cards */
.advantage-card{text-align:center;padding:40px 28px;border:1px solid #e8ecf1;background:#fff}
.advantage-card:hover{background:#fafbfc;border-color:#d0d8e0}
.adv-icon{width:56px;height:56px;border-radius:14px;background:#eef3ff;color:#175ead;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;font-size:1.5rem;font-weight:700}

/* Placeholder */
.placeholder-img{width:100%;height:100%;background:linear-gradient(135deg,#e8ecf2,#d4dae4);display:flex;align-items:center;justify-content:center}
.placeholder-img::after{content:'LCCFAIR';color:#9ca3af;font-size:1.1rem;font-weight:700;letter-spacing:.04em}
.placeholder-img.dark{background:linear-gradient(135deg,#1e3d5c,#142d44)}
.placeholder-img.dark::after{color:rgba(255,255,255,.25)}

/* ===== CTA ===== */
.cta-section{text-align:center;padding:100px 0}
.cta-section h2{font-size:clamp(1.75rem,3.5vw,2.5rem);font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:-.01em}
.cta-section p{color:rgba(255,255,255,.8);font-size:1.15rem;margin-bottom:40px;max-width:500px;margin-inline:auto}
.cta-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:#00141e;color:rgba(255,255,255,.7);padding:80px 40px 0}
.footer-grid{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:56px}
.footer-logo{font-size:1.4rem;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-.01em}
.footer-col h4{color:#fff;font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;margin-bottom:20px}
.footer-col ul{list-style:none;padding:0}
.footer-col ul li{margin-bottom:12px}
.footer-col a{color:rgba(255,255,255,.6);font-size:.9rem}
.footer-col a:hover{color:#fff}
.footer-contact li{font-size:.9rem;margin-bottom:10px;display:flex;align-items:flex-start;gap:8px}
.footer-contact li::before{content:'';display:inline-block;width:4px;height:4px;border-radius:50%;background:#175ead;margin-top:10px;flex-shrink:0}
.footer-bottom{max-width:1280px;margin:0 auto;padding:24px 0;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;font-size:.85rem;color:rgba(255,255,255,.4)}
.footer-legal{display:flex;gap:24px}
.footer-legal a{color:rgba(255,255,255,.4);font-size:.85rem}
.footer-legal a:hover{color:#fff}
.icp-link{display:block;margin-top:6px;color:rgba(255,255,255,.3);font-size:.78rem}

/* ===== Modal ===== */
.modal{display:none;position:fixed;inset:0;z-index:200;align-items:center;justify-content:center}
.modal.open{display:flex}
.modal-overlay{position:absolute;inset:0;background:rgba(0,0,0,.55);backdrop-filter:blur(4px)}
.modal-content{position:relative;background:#fff;padding:44px 36px;border-radius:16px;max-width:460px;width:92%;text-align:center}
.modal-close{position:absolute;top:16px;right:20px;background:none;border:none;font-size:1.5rem;cursor:pointer;color:#9ca3af;transition:color .2s}
.modal-close:hover{color:#333}
.modal-content h3{font-size:1.4rem;font-weight:700;color:#001e40;margin-bottom:8px;letter-spacing:-.01em}
.modal-content>p{color:#6b7280;margin-bottom:28px}
.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px}
.modal-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:24px 16px;background:#f6f8fb;border-radius:10px;text-align:center;transition:all .2s;color:#333;border:1px solid transparent}
.modal-card:hover{background:#eef3ff;border-color:#cfdfff}
.modal-icon{width:48px;height:48px;border-radius:12px;background:#e0ebff;color:#175ead;display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:700}
.modal-card strong{display:block;font-size:.95rem;color:#001e40}
.modal-card small{font-size:.8rem;color:#9ca3af;margin-top:2px}
.modal-note{font-size:.8rem;color:#9ca3af;margin-top:16px}

/* ===== RESPONSIVE ===== */
@media (max-width:1024px){
  .col-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
  .hero-arrow{display:none}
  .hero-carousel{height:650px}
  .page-hero{height:450px}
  .section{padding:80px 0}
}
@media (max-width:768px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-quote{display:none}
  .col-3,.col-4{grid-template-columns:1fr;gap:20px}
  .section{padding:56px 0}
  .section-header{margin-bottom:40px}
  .section-header h2{font-size:1.5rem}
  .hero-carousel{height:550px}
  .hero-content h1{font-size:1.7rem}
  .hero-content p{font-size:1rem;margin-bottom:24px}
  .hero-btns .btn{padding:12px 28px;font-size:.9rem}
  .container,.header-inner{padding:0 20px}
  .card{display:flex;flex-direction:column}
  .card-img{aspect-ratio:4/3}
  .card-body{flex:1;display:flex;flex-direction:column;gap:10px;padding:20px 16px 24px}
  .card-body h3{font-size:1.05rem}
  .card-body p{font-size:.85rem;flex:1}
  .btn-outline-sm{width:100%;text-align:center;margin-top:auto;align-self:stretch}
  .read-more{margin-top:auto}
  .solution-card{aspect-ratio:3/2}
  .solution-card .card-body{padding:24px 16px 20px}
  .site-footer{padding:48px 20px 0}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-col h4{margin-bottom:12px}
  .footer-col ul li{margin-bottom:8px}
  .footer-bottom{flex-direction:column;text-align:center;gap:12px}
  .footer-legal{justify-content:center}
  .modal-content{padding:28px 20px}
  .modal-actions{grid-template-columns:1fr}
}
@media (max-width:480px){
  .hero-carousel{height:500px}
  .hero-content h1{font-size:1.4rem}
  .hero-btns{flex-direction:column;gap:10px}
  .hero-btns .btn{width:100%;text-align:center;justify-content:center}
  .hero-arrow{width:36px;height:36px}
  .cta-btns{flex-direction:column;align-items:center}
  .btn{padding:12px 24px;font-size:.9rem}
}

/* ============================================================
   PRODUCT PAGES
   ============================================================ */
.page-hero{position:relative;height:600px;display:flex;align-items:center;overflow:hidden}
.page-hero .hero-overlay{position:absolute;inset:0;background:rgba(0,20,40,.5)}
.page-hero-content{position:relative;z-index:1;color:#fff}
.page-hero-content h1{font-size:clamp(1.5rem,3.5vw,2.75rem);font-weight:700;margin-bottom:10px}
.page-hero-content p{font-size:1.1rem;opacity:.85;max-width:560px}
.breadcrumb{padding:14px 0;background:#f8f9fb;border-bottom:1px solid #eef0f3;font-size:.85rem}
.breadcrumb a{color:#6b7280}.breadcrumb a:hover{color:#175ead}
.breadcrumb span{color:#9ca3af;margin:0 6px}
.product-layout{display:flex;gap:40px}
.product-sidebar{width:240px;flex-shrink:0}
.product-sidebar h3{font-size:1.1rem;font-weight:700;color:#001e40;margin-bottom:16px}
.product-main{flex:1;min-width:0}
.cat-list{list-style:none;padding:0;margin:0 0 20px}
.cat-link{display:flex;justify-content:space-between;padding:10px 14px;border-radius:8px;font-size:.9rem;color:#4b5563;transition:all .2s;margin-bottom:4px}
.cat-link:hover{background:#f0f4ff;color:#175ead}
.cat-link.active{background:#175ead;color:#fff;font-weight:600}
.cat-count{background:rgba(0,0,0,.06);padding:2px 8px;border-radius:10px;font-size:.75rem}
.cat-link.active .cat-count{background:rgba(255,255,255,.2)}
.btn-clear{display:inline-block;font-size:.85rem;color:#175ead;margin-top:4px}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-list-card{display:flex;flex-direction:column}
.product-list-card .card-img{aspect-ratio:1}
.product-list-card .card-body{flex:1;display:flex;flex-direction:column;gap:8px}
.card-specs-mini{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.card-specs-mini span{font-size:.75rem;color:#6b7280;background:#f0f3f7;padding:3px 8px;border-radius:4px}
.empty-state{text-align:center;padding:80px 20px}
.empty-state h2{font-size:1.5rem;color:#001e40;margin-bottom:12px}
.empty-state p{color:#6b7280;margin-bottom:24px}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:48px}
.pagination a,.pagination span{padding:10px 16px;border-radius:8px;font-size:.9rem;font-weight:500;border:1px solid #e0e3e8}
.pagination a{color:#175ead}.pagination a:hover{background:#f0f4ff}
.pagination .current{background:#175ead;color:#fff;border-color:#175ead}
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.product-gallery{position:sticky;top:92px}
.product-main-img{width:100%;border-radius:14px}
.product-info h1{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;color:#001e40;margin:12px 0}
.product-excerpt{font-size:1.05rem;color:#4b5563;line-height:1.7;margin-bottom:28px}
.specs-table{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:#eef0f3;border-radius:10px;overflow:hidden;margin-bottom:28px}
.spec-row{display:flex;flex-direction:column;padding:14px 18px;background:#fff;gap:4px}
.spec-label{font-size:.75rem;font-weight:600;color:#9ca3af;text-transform:uppercase;letter-spacing:.04em}
.spec-value{font-size:1rem;font-weight:600;color:#001e40}
.product-actions{display:flex;gap:12px}
.product-content h2{font-size:1.5rem;font-weight:700;color:#001e40;margin-bottom:20px}
.prose{color:#4b5563;line-height:1.8;font-size:1rem}
.prose p{margin-bottom:16px}
.prose ul,.prose ol{margin-bottom:16px;padding-left:20px}
.prose li{margin-bottom:8px}
@media (max-width:1024px){
.product-grid{grid-template-columns:repeat(2,1fr)}
.product-detail{grid-template-columns:1fr;gap:32px}
.product-gallery{position:static}
}
@media (max-width:768px){
.product-layout{flex-direction:column}
.product-sidebar{width:100%}
.cat-list{display:flex;flex-wrap:wrap;gap:6px}
.cat-link{margin-bottom:0;font-size:.8rem;padding:8px 12px}
.product-grid{grid-template-columns:1fr;gap:16px}
.page-hero{height:380px}
.page-hero-content h1{font-size:1.4rem}
.specs-table{grid-template-columns:1fr}
.product-actions{flex-direction:column}
.product-actions .btn,.product-actions .btn-outline-sm{width:100%;text-align:center}
}

/* ============================================================
   ABOUT PAGE — 关于我们
   ============================================================ */
/* About split layout */
.about-split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.about-img-box{aspect-ratio:4/3;background:linear-gradient(135deg,#d4dce8,#b8c8e0);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;color:#8a9bb5;letter-spacing:.04em}
/* Tab buttons */
.about-tabs{display:flex;gap:8px;margin-top:24px;flex-wrap:wrap}
.about-tab-btn{padding:11px 22px;border:1.5px solid #d0d8e0;background:#fff;border-radius:6px;font-size:.88rem;font-weight:500;color:#4b5563;cursor:pointer;transition:all .2s}
.about-tab-btn:hover{border-color:#175ead;color:#175ead}
.about-tab-btn.active{background:#175ead;color:#fff;border-color:#175ead}
/* Data stats row */
.data-stats{display:flex;justify-content:space-around;text-align:center;padding:56px 0}
.data-stat h3{font-size:clamp(2rem,4vw,3rem);font-weight:800;color:#175ead;margin-bottom:8px;letter-spacing:-.02em}
.data-stat span{font-size:.95rem;color:#6b7280}
/* Product showcase split */
.product-showcase{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.product-showcase .showcase-img{aspect-ratio:4/3;background:linear-gradient(135deg,#e0e6f0,#cdd6e4);border-radius:14px;display:flex;align-items:center;justify-content:center;color:#8a9bb5;font-size:1rem}
.showcase-dots{display:flex;gap:10px;justify-content:center;margin-top:28px}
.showcase-dots span{width:10px;height:10px;border-radius:50%;background:#ccd4e0;cursor:pointer;transition:all .2s}
.showcase-dots span.active{background:#175ead;transform:scale(1.3)}
/* Application areas — 竖向卡片 + hover 动效 */
.app-banner{padding:100px 0;background:linear-gradient(135deg,#0d2845,#001e40);color:#fff;position:relative}
.app-banner .app-inner{max-width:1280px;margin:0 auto;padding:0 40px}
.app-banner .app-title{text-align:center;margin-bottom:52px}
.app-banner .app-title .en{font-size:.78rem;font-weight:600;color:rgba(255,255,255,.45);text-transform:uppercase;letter-spacing:.14em;display:block;margin-bottom:8px}
.app-banner .app-title h2{font-size:clamp(1.75rem,3vw,2.5rem);font-weight:700;color:#fff;letter-spacing:-.01em}
.app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.app-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:36px 20px 28px;text-align:center;transition:all .4s cubic-bezier(.4,0,.2,1);cursor:pointer;position:relative;overflow:hidden}
.app-card::before{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 0%,rgba(23,94,173,.15) 100%);opacity:0;transition:opacity .4s}
.app-card:hover{transform:translateY(-8px);border-color:rgba(255,255,255,.3);box-shadow:0 20px 48px rgba(0,0,0,.3)}
.app-card:hover::before{opacity:1}
.app-card .app-card-icon{font-size:2.2rem;display:block;margin-bottom:16px;position:relative;z-index:1;transition:transform .4s}
.app-card:hover .app-card-icon{transform:scale(1.15)}
.app-card h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:8px;position:relative;z-index:1}
.app-card p{color:rgba(255,255,255,.5);font-size:.8rem;line-height:1.5;position:relative;z-index:1;transition:color .4s}
.app-card:hover p{color:rgba(255,255,255,.75)}
/* Case filter tabs */
.case-filters{display:flex;gap:16px;margin-bottom:32px;flex-wrap:wrap}
.case-filter{font-size:.9rem;color:#6b7280;cursor:pointer;padding:6px 0;border-bottom:2px solid transparent;transition:all .2s;font-weight:500}
.case-filter:hover{color:#175ead}
.case-filter.active{color:#175ead;border-bottom-color:#175ead}
/* Case grid cards */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card-item{aspect-ratio:4/3;background:linear-gradient(135deg,#dce3ee,#c8d4e4);border-radius:12px;transition:all .3s;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#8a9bb5;font-size:.9rem}
.case-card-item:hover{transform:scale(1.02);box-shadow:0 12px 32px rgba(0,0,0,.08)}
/* Contact form */
.contact-section{background:#f5f7fa}
.contact-form-wrap{max-width:680px;margin:0 auto}
.contact-form-wrap .form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
.contact-form-wrap input,.contact-form-wrap textarea,.contact-form-wrap select{width:100%;padding:14px 16px;border:1.5px solid #dce1e8;border-radius:8px;font-size:.95rem;font-family:inherit;transition:border-color .2s;background:#fff;color:#333}
.contact-form-wrap input:focus,.contact-form-wrap textarea:focus,.contact-form-wrap select:focus{outline:none;border-color:#175ead;box-shadow:0 0 0 3px rgba(23,94,173,.08)}
.contact-form-wrap textarea{resize:vertical;min-height:140px}
.contact-form-wrap .btn-submit{width:100%;padding:16px;font-size:1rem;font-weight:600;border:none;border-radius:8px;cursor:pointer;background:#175ead;color:#fff;transition:all .25s}
.contact-form-wrap .btn-submit:hover{background:#0f4a8a;box-shadow:0 8px 24px rgba(23,94,173,.3)}
/* About page responsive */
@media (max-width:1024px){
  .about-split{grid-template-columns:1fr;gap:40px}
  .product-showcase{grid-template-columns:1fr}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .data-stats{gap:32px}
  .app-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .about-split{grid-template-columns:1fr;gap:28px}
  .data-stats{flex-direction:column;gap:28px;padding:40px 0}
  .app-grid{grid-template-columns:1fr;gap:14px}
  .app-card{padding:24px 16px 20px}
  .case-grid{grid-template-columns:1fr}
  .product-showcase{gap:24px}
  .about-tabs{gap:6px}
  .about-tab-btn{padding:9px 16px;font-size:.8rem}
  .contact-form-wrap .form-row{grid-template-columns:1fr}
}