/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei','Helvetica Neue',Helvetica,Arial,sans-serif;line-height:1.6;color:#333;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary-color);text-decoration:none;transition:color .2s}
a:hover{color:var(--secondary-color)}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700}
address{font-style:normal}

/* ===== Container ===== */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer;border:2px solid transparent;transition:all .25s;text-align:center;vertical-align:middle}
.btn-primary{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}
.btn-primary:hover{background:var(--secondary-color);border-color:var(--secondary-color);color:#fff}
.btn-outline{background:transparent;color:var(--primary-color);border-color:var(--primary-color)}
.btn-outline:hover{background:var(--primary-color);color:#fff}
.btn-block{display:block;width:100%}
.btn-sm{padding:6px 14px;font-size:13px}

/* ===== Header & Nav ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.97);box-shadow:0 1px 6px rgba(0,0,0,.08);backdrop-filter:blur(10px)}
.main-nav .container{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;text-decoration:none;color:#333;max-width:fit-content;overflow:hidden;flex-shrink:0;gap:10px}
.logo img{max-height:48px;width:auto;height:auto;object-fit:contain;display:block}
.logo-text{font-size:22px;font-weight:800;color:var(--primary-color);letter-spacing:1px}
.nav-menu{display:flex;gap:4px;align-items:center}
.nav-item{position:relative}
.nav-item>a{display:block;padding:10px 18px;font-size:15px;font-weight:500;color:#333;transition:color .2s}
.nav-item>a:hover{color:var(--primary-color)}
.nav-item.has-dropdown>a::after{content:'▾';font-size:11px;margin-left:4px}
.dropdown{display:none;position:absolute;top:100%;left:0;background:#fff;min-width:160px;box-shadow:0 6px 20px rgba(0,0,0,.1);border-radius:0 0 8px 8px;z-index:100}
.nav-item.has-dropdown:hover .dropdown{display:block}
.dropdown li a{display:block;padding:10px 20px;font-size:14px;color:#555}
.dropdown li a:hover{background:var(--primary-color);color:#fff}
.mobile-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.mobile-toggle span{display:block;width:24px;height:2px;background:#333;transition:all .3s}

/* ===== Hero Section ===== */
.hero-section{position:relative;min-height:600px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(135deg,var(--primary-color) 0%,#1a1a2e 100%);padding-top:72px}
.hero-content{position:relative;z-index:2;color:#fff;max-width:700px}
.hero-title{font-size:42px;font-weight:800;margin-bottom:16px;line-height:1.2;letter-spacing:1px}
.hero-subtitle{font-size:20px;opacity:.85;margin-bottom:36px;font-weight:300}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-actions .btn-outline{border-color:rgba(255,255,255,.6);color:#fff}
.hero-actions .btn-outline:hover{background:#fff;color:var(--primary-color);border-color:#fff}
.hero-bg{position:absolute;inset:0;z-index:1}
.hero-deco{position:absolute;right:-100px;top:50%;transform:translateY(-50%);width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.06) 0%,transparent 70%)}

/* ===== Banner Carousel ===== */
.banner-carousel{position:relative;min-height:600px;overflow:hidden;padding-top:72px;background:#1a1a2e}
.banner-track{position:relative;height:100%;min-height:528px}
.banner-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s ease;pointer-events:none}
.banner-slide.active{opacity:1;pointer-events:auto;z-index:1}
.banner-slide img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.banner-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,0,0,.65) 0%,rgba(0,0,0,.35) 100%);z-index:1}
.banner-text{position:absolute;z-index:2;left:50%;top:50%;transform:translate(-50%,-50%);text-align:center;color:#fff;width:90%;max-width:700px}
.banner-title{font-size:42px;font-weight:800;margin-bottom:16px;line-height:1.2;letter-spacing:1px;text-shadow:0 2px 12px rgba(0,0,0,.35)}
.banner-subtitle{font-size:20px;opacity:.9;margin-bottom:28px;font-weight:300;text-shadow:0 1px 8px rgba(0,0,0,.3)}
.banner-text .btn{padding:14px 36px;font-size:16px}
.banner-dots{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);z-index:3;display:flex;gap:10px}
.banner-dot{width:12px;height:12px;border-radius:50%;border:2px solid rgba(255,255,255,.7);background:transparent;cursor:pointer;transition:all .3s;padding:0}
.banner-dot.active,.banner-dot:hover{background:#fff;border-color:#fff}
.banner-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:44px;height:44px;border-radius:50%;border:none;background:rgba(255,255,255,.2);color:#fff;font-size:20px;cursor:pointer;transition:all .3s;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(4px)}
.banner-arrow:hover{background:rgba(255,255,255,.4)}
.banner-prev{left:20px}
.banner-next{right:20px}
@media(max-width:768px){
  .banner-carousel{min-height:420px;padding-top:60px}
  .banner-track{min-height:360px}
  .banner-title{font-size:26px}
  .banner-subtitle{font-size:15px}
  .banner-arrow{width:36px;height:36px;font-size:16px}
}

/* ===== Section ===== */
.section{padding:80px 0}
.section-header{text-align:center;margin-bottom:50px}
.section-en{display:block;font-size:14px;color:var(--primary-color);font-weight:600;letter-spacing:3px;text-transform:uppercase;margin-bottom:8px;opacity:.7}
.section-title{font-size:32px;color:#1a1a2e;margin-bottom:12px}
.section-line{width:60px;height:3px;background:var(--primary-color);margin:0 auto;border-radius:2px}
.section-footer{text-align:center;margin-top:40px}

/* ===== Service Cards ===== */
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{background:#fff;border-radius:12px;padding:36px 24px;text-align:center;border:1px solid #eee;transition:all .3s}
.service-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(0,0,0,.08);border-color:var(--primary-color)}
.service-icon{font-size:48px;margin-bottom:16px}
.service-title{font-size:18px;margin-bottom:4px;color:#1a1a2e}
.service-en{font-size:12px;color:#999;text-transform:uppercase;letter-spacing:2px;display:block;margin-bottom:12px}
.service-desc{font-size:14px;color:#666;line-height:1.6}

/* ===== Works/Cases Grid ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.work-card{display:block;border-radius:10px;overflow:hidden;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;text-decoration:none;color:inherit}
.work-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.work-img{position:relative;overflow:hidden;aspect-ratio:4/3;background:#f0f0f0}
.work-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.work-card:hover .work-img img{transform:scale(1.05)}
.work-overlay{position:absolute;bottom:0;left:0;right:0;padding:12px;background:linear-gradient(transparent,rgba(0,0,0,.6))}
.work-category{color:#fff;font-size:12px;background:var(--primary-color);padding:3px 10px;border-radius:20px}
.work-info{padding:16px}
.work-info h3{font-size:15px;margin-bottom:6px;color:#1a1a2e}
.work-info p{font-size:13px;color:#888;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== Advantages ===== */
.advantages-section{background:#f8f9fa}
.advantages-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.advantage-item{text-align:center;padding:30px 20px}
.adv-icon{font-size:44px;margin-bottom:16px}
.advantage-item h3{font-size:18px;color:#1a1a2e;margin-bottom:10px}
.advantage-item p{font-size:14px;color:#666}

/* ===== News ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{display:flex;gap:16px;padding:20px;border-radius:10px;border:1px solid #eee;transition:all .3s;background:#fff}
.news-card:hover{border-color:var(--primary-color);box-shadow:0 4px 16px rgba(0,0,0,.06)}
.news-card-img{flex-shrink:0;width:120px;height:80px;border-radius:6px;overflow:hidden}
.news-card-img img{width:100%;height:100%;object-fit:cover}
.news-card-text{flex:1;min-width:0;display:flex;flex-direction:column}
.news-date{flex-shrink:0;text-align:center;min-width:60px}
.news-date time{display:block;font-size:24px;font-weight:700;color:var(--primary-color)}
.news-body{flex:1;min-width:0}
.news-category{font-size:12px;color:var(--primary-color);background:rgba(26,115,232,.08);padding:2px 8px;border-radius:10px}
.news-body h3{font-size:15px;margin:6px 0;color:#1a1a2e}
.news-body h3 a{color:inherit}
.news-body h3 a:hover{color:var(--primary-color)}
.news-body p{font-size:13px;color:#888;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== Contact Section ===== */
.contact-section{background:#f8f9fa}
.contact-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:start}
.contact-info p{margin-bottom:12px;color:#555;font-size:15px}
.contact-phone a,.contact-email a{color:var(--primary-color);font-weight:600}
.contact-form{background:#fff;padding:30px;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.form-group{margin-bottom:18px}
.form-group label{display:block;margin-bottom:6px;font-size:14px;font-weight:600;color:#333}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 14px;border:1px solid #ddd;border-radius:6px;font-size:14px;transition:border-color .2s;background:#fff;font-family:inherit}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(26,115,232,.1)}

/* ===== Page Banner ===== */
.page-banner{background:linear-gradient(135deg,var(--primary-color),#1a1a2e);color:#fff;text-align:center;padding:120px 0 60px}
.page-banner h1{font-size:36px;font-weight:800;margin-bottom:8px}
.page-banner p{font-size:14px;opacity:.6;letter-spacing:3px;text-transform:uppercase}

/* ===== Page Content ===== */
.page-content{max-width:800px;margin:0 auto;font-size:16px;line-height:1.8;color:#444}
.page-content h2{font-size:24px;margin:30px 0 15px;color:#1a1a2e}
.page-content h3{font-size:20px;margin:24px 0 12px;color:#1a1a2e}
.page-content p{margin-bottom:16px}

/* ===== Services Page ===== */
.services-list{max-width:900px;margin:0 auto}
.service-detail-item{display:flex;align-items:center;gap:40px;padding:40px 0;border-bottom:1px solid #eee}
.service-detail-item:last-child{border-bottom:none}
.service-detail-item.reverse{flex-direction:row-reverse;text-align:right}
.service-detail-icon{font-size:64px;flex-shrink:0}
.service-detail-info h2{font-size:24px;color:#1a1a2e;margin-bottom:4px}
.service-detail-info .service-en{font-size:12px;color:#999;text-transform:uppercase;letter-spacing:2px;display:block;margin-bottom:12px}
.service-detail-info p{color:#666;font-size:15px;line-height:1.7}

/* ===== Cases Full Grid ===== */
.filter-bar{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}
.filter-btn{padding:8px 20px;border:1px solid #ddd;background:#fff;border-radius:20px;font-size:14px;cursor:pointer;transition:all .2s}
.filter-btn.active,.filter-btn:hover{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}
.cases-full-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-full-card{display:block;border-radius:10px;overflow:hidden;background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;text-decoration:none;color:inherit;cursor:pointer}
.case-full-card:hover{transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.case-full-card.hidden{display:none}
.case-img{aspect-ratio:4/3;background:#f0f0f0;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-full-card:hover .case-img img{transform:scale(1.05)}
.case-info{padding:20px}
.case-category{font-size:12px;color:var(--primary-color);background:rgba(26,115,232,.08);padding:3px 10px;border-radius:10px;display:inline-block;margin-bottom:8px}
.case-info h3{font-size:17px;color:#1a1a2e;margin-bottom:8px}
.case-info p{font-size:14px;color:#888;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* ===== Case Detail ===== */
.case-detail{max-width:900px;margin:0 auto}
.case-detail-cover{border-radius:12px;overflow:hidden;margin-bottom:24px;background:#f0f0f0}
.case-detail-cover img{width:100%;display:block}
.case-detail-meta{margin-bottom:24px}
.case-detail-category{font-size:13px;color:var(--primary-color);background:rgba(26,115,232,.08);padding:4px 14px;border-radius:12px;display:inline-block}
.case-detail-summary{font-size:16px;line-height:1.8;color:#666;padding:16px 20px;background:#f8f9fa;border-left:3px solid var(--primary-color);border-radius:4px;margin-bottom:24px}
.case-detail-content{font-size:16px;line-height:1.8;color:#333;margin-bottom:32px}
.case-detail-content h3{font-size:20px;color:#1a1a2e;margin:24px 0 12px}
.case-detail-content h2{font-size:22px;color:#1a1a2e;margin:28px 0 14px}
.case-detail-content p{margin-bottom:14px}
.case-detail-content img{max-width:100%;height:auto;border-radius:8px;margin:12px 0}
.case-detail-content video{max-width:100%;height:auto;border-radius:8px;margin:12px 0}
.case-detail-content ul,.case-detail-content ol{margin:12px 0;padding-left:24px}
.case-detail-content li{margin-bottom:6px}
.case-detail-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:24px;border-top:1px solid #eee;flex-wrap:wrap}
.case-detail-nav .btn{min-width:100px}

/* ===== News List ===== */
.news-list-header{margin-bottom:30px;overflow-x:auto}
.news-tabs{display:flex;gap:4px;justify-content:center}
.news-tab{padding:8px 24px;border-radius:20px;font-size:14px;color:#555;transition:all .2s;border:1px solid #eee}
.news-tab:hover,.news-tab.active{background:var(--primary-color);color:#fff;border-color:var(--primary-color)}
.news-list{max-width:800px;margin:0 auto}
.news-list-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid #eee}
.news-list-img{flex-shrink:0;width:200px;height:130px;border-radius:8px;overflow:hidden;background:#f0f0f0}
.news-list-img img{width:100%;height:100%;object-fit:cover}
.news-list-date{flex-shrink:0;text-align:center;min-width:70px;background:var(--primary-color);color:#fff;border-radius:8px;padding:10px 12px;display:flex;flex-direction:column;align-items:center;justify-content:center}
.date-day{font-size:28px;font-weight:800;line-height:1}
.date-ym{font-size:12px;opacity:.8}
.news-list-body{flex:1}
.news-tag{font-size:12px;color:var(--primary-color);background:rgba(26,115,232,.08);padding:2px 8px;border-radius:10px;display:inline-block;margin-bottom:6px}
.news-list-body h3{font-size:18px;margin-bottom:8px}
.news-list-body h3 a{color:#1a1a2e}
.news-list-body h3 a:hover{color:var(--primary-color)}
.news-list-body p{font-size:14px;color:#888;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.read-more{font-size:13px;color:var(--primary-color)}
.empty-tip{text-align:center;color:#999;padding:40px 0;font-size:16px}

/* ===== News Detail ===== */
.news-detail{max-width:800px;margin:0 auto}
.news-detail-cover{margin-bottom:24px;border-radius:10px;overflow:hidden}
.news-detail-cover img{width:100%;max-height:400px;object-fit:cover;display:block}
.news-detail-meta{display:flex;gap:16px;align-items:center;color:#888;font-size:14px;margin-bottom:30px;flex-wrap:wrap}
.news-detail-category{background:var(--primary-color);color:#fff;padding:3px 12px;border-radius:12px;font-size:12px}
.news-detail-content{font-size:16px;line-height:1.9;color:#444}
.news-detail-content h2{font-size:22px;margin:30px 0 15px}
.news-detail-content p{margin-bottom:16px}
.news-detail-content img{max-width:100%;height:auto;border-radius:6px;margin:12px 0}
.news-detail-content figure{margin:16px 0}
.news-detail-content figcaption{font-size:14px;color:#888;text-align:center;margin-top:4px}
.news-detail-nav{margin-top:40px;padding-top:20px;border-top:1px solid #eee}

/* ===== Contact Full Page ===== */
.contact-full-section{background:#fff}
.contact-wrapper{display:grid;grid-template-columns:1fr 1fr;gap:50px}
.contact-info h2{font-size:24px;color:#1a1a2e;margin-bottom:16px}
.contact-detail-item{margin-bottom:20px}
.contact-detail-item strong{display:block;margin-bottom:6px;color:#1a1a2e}
.contact-phone-big{font-size:28px;font-weight:800;color:var(--primary-color)}
.contact-form-wrapper h3{font-size:20px;margin-bottom:20px;color:#1a1a2e}
.contact-form-wrapper .contact-form{background:#f8f9fa;box-shadow:none;border:1px solid #eee}

/* ===== Footer ===== */
.site-footer{background:#1a1a2e;color:#ccc;padding:60px 0 0}
.footer-top{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-col h3{color:#fff;font-size:16px;margin-bottom:16px}
.footer-col p{font-size:14px;color:#999;line-height:1.7;margin-bottom:8px}
.footer-col ul li{margin-bottom:8px}
.footer-col ul a{color:#999;font-size:14px;transition:color .2s}
.footer-col ul a:hover{color:var(--primary-color)}
.footer-bottom{text-align:center;padding:20px 0;font-size:13px;color:#666}
.footer-bottom a{color:#999}
.footer-links{display:flex;justify-content:center;gap:16px;margin-top:8px}
.footer-links a{color:#888}

/* ===== Sitemap Page ===== */
.page-heading{text-align:center;font-size:32px;margin-bottom:40px;color:#1a1a2e}
.sitemap-section{margin-bottom:40px}
.sitemap-section h2{font-size:20px;color:#1a1a2e;margin-bottom:16px;border-bottom:2px solid var(--primary-color);padding-bottom:8px;display:inline-block}
.sitemap-list li{margin-bottom:8px;font-size:15px}
.sitemap-list a{color:var(--primary-color)}
.sitemap-url{font-size:12px;color:#999;margin-left:10px}

/* ===== 404 ===== */
.error-section{min-height:60vh;display:flex;align-items:center}
.error-content{text-align:center}
.error-content h1{font-size:120px;color:var(--primary-color);font-weight:900;margin-bottom:16px}
.error-content p{font-size:18px;color:#888;margin-bottom:30px}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .advantages-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .mobile-toggle{display:flex}
  .nav-menu{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:10px;box-shadow:0 6px 20px rgba(0,0,0,.1)}
  .nav-menu.active{display:flex}
  .nav-item>a{padding:12px 16px;border-bottom:1px solid #f0f0f0}
  .dropdown{position:static;box-shadow:none;display:none;padding-left:16px}
  .nav-item.has-dropdown.open .dropdown{display:block}
  .hero-section{min-height:450px}
  .hero-title{font-size:28px}
  .services-grid,.works-grid,.advantages-grid,.news-grid{grid-template-columns:1fr}
  .contact-wrapper,.footer-top{grid-template-columns:1fr}
  .cases-full-grid{grid-template-columns:1fr}
  .service-detail-item{flex-direction:column!important;text-align:center!important}
  .page-banner{padding:100px 0 40px}
  .page-banner h1{font-size:26px}
}