/* 风格B：极简白 */
:root{--primary:#1a1a1a;--primary-light:#404040;--accent:#0066ff;--accent-dark:#0052cc;--bg:#fff;--bg-alt:#fafafa;--text:#222;--text-light:#666;--border:#e8e8e8;--shadow:0 2px 12px rgba(0,0,0,.04);--shadow-hover:0 6px 20px rgba(0,0,0,.08);--radius:4px;}
*
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;color:var(--text);line-height:1.7;background:var(--bg);overflow-x:hidden;}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:80px 0;}
.section-alt{background:var(--bg-alt);}
.section-header{text-align:center;margin-bottom:56px;}
.section-title{font-size:36px;font-weight:800;color:var(--primary);margin-bottom:14px;}
.section-title .accent{color:var(--accent);}
.section-subtitle{font-size:16px;color:var(--text-light);max-width:640px;margin:0 auto;}
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:translateY(0);}
.footer{background:var(--primary);color:rgba(255,255,255,.7);padding:60px 0 0;}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand h4{font-size:20px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand p{font-size:14px;line-height:1.8;margin-bottom:16px;}
.footer-col h4{font-size:16px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;list-style:none;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);transition:color .3s;}
.footer-links a:hover{color:var(--accent);}
.footer-contact{list-style:none;}
.footer-contact li{font-size:14px;padding:6px 0;}
.footer-bottom{padding:24px 0;text-align:center;font-size:13px;}
.footer-bottom a{color:rgba(255,255,255,.8);margin:0 6px;}
.footer-bottom a:hover{color:var(--accent);}
.footer-bottom .links{margin-top:6px;}
@media(max-width:1024px){.footer-top{grid-template-columns:1fr 1fr;}}
@media(max-width:768px){.section{padding:50px 0;}.section-title{font-size:26px;}.footer-top{grid-template-columns:1fr;}}

.banner-section{position:relative;min-height:600px;background:#fff;overflow:hidden;border-bottom:1px solid var(--border);}
.banner-bg{position:absolute;top:0;right:0;width:50%;height:100%;background:linear-gradient(135deg,#f5f7fa 0%,#e8eef5 100%);z-index:1;}
.banner-bg::before{content:'';position:absolute;top:20%;right:10%;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(0,102,255,.1) 0%,transparent 70%);animation:pulse 6s ease-in-out infinite;}
@keyframes pulse{0%,100%{transform:scale(1);}50%{transform:scale(1.1);}}
.banner-inner{position:relative;z-index:2;}
.banner-nav{display:flex;align-items:center;justify-content:space-between;padding:20px 0;border-bottom:1px solid var(--border);}
.logo-text{font-size:26px;font-weight:700;color:var(--primary);letter-spacing:-.5px;}
.logo-text .tm{font-size:11px;vertical-align:super;color:var(--accent);margin-left:2px;}
.logo-text .biz{font-size:20px;font-weight:500;color:var(--accent);margin-left:8px;}
.nav-menu{display:flex;gap:32px;list-style:none;flex-wrap:wrap;}
.nav-menu a{color:var(--text);font-size:14px;font-weight:500;padding:6px 0;transition:color .3s;}
.nav-menu a:hover{color:var(--accent);}
.nav-cta{color:var(--accent)!important;font-weight:600;}
.banner-content{padding:60px 0 80px;max-width:600px;}
.banner-title{font-size:46px;font-weight:800;color:var(--primary);line-height:1.15;margin-bottom:20px;letter-spacing:-1px;}
.banner-title .highlight{color:var(--accent);position:relative;}
.banner-title .highlight::after{content:'';position:absolute;bottom:0;left:0;right:0;height:8px;background:rgba(0,102,255,.1);z-index:-1;}
.banner-subtitle{font-size:17px;color:var(--text-light);margin-bottom:36px;line-height:1.7;}
.banner-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:40px;}
.banner-tag{padding:6px 14px;background:var(--bg-alt);border:1px solid var(--border);color:var(--text);font-size:13px;border-radius:4px;}
.banner-actions{display:flex;gap:16px;flex-wrap:wrap;}
.btn-primary{display:inline-flex;align-items:center;gap:8px;background:var(--primary);color:#fff;padding:14px 32px;border-radius:4px;font-size:15px;font-weight:600;transition:all .3s;}
.btn-primary:hover{background:var(--accent);transform:translateY(-2px);}
.btn-outline{display:inline-flex;align-items:center;gap:8px;border:2px solid var(--primary);color:var(--primary);padding:12px 30px;border-radius:4px;font-size:15px;font-weight:600;transition:all .3s;}
.btn-outline:hover{background:var(--primary);color:#fff;}
.stats-bar{background:var(--bg-alt);padding:36px 0;border-bottom:1px solid var(--border);}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center;}
.stat-item{padding:0 20px;}
.stat-num{font-size:40px;font-weight:800;color:var(--primary);line-height:1;letter-spacing:-1px;}
.stat-num span{font-size:18px;color:var(--accent);}
.stat-label{font-size:13px;color:var(--text-light);margin-top:8px;letter-spacing:1px;text-transform:uppercase;}
.advantages-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.advantage-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;transition:all .3s;}
.advantage-card:hover{border-color:var(--accent);box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.advantage-icon{width:56px;height:56px;margin:0 0 20px;background:var(--bg-alt);border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:26px;color:var(--accent);}
.advantage-card h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:10px;}
.advantage-card p{font-size:14px;color:var(--text-light);line-height:1.6;}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.service-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s;}
.service-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.service-img{height:180px;background:linear-gradient(135deg,#f5f7fa,#e8eef5);position:relative;}
.service-img .icon{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:52px;color:var(--accent);}
.service-body{padding:24px;}
.service-body h3{font-size:17px;font-weight:700;color:var(--primary);margin-bottom:8px;}
.service-body p{font-size:14px;color:var(--text-light);line-height:1.6;}
.industries-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.industry-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;transition:all .3s;}
.industry-card:hover{border-color:var(--accent);box-shadow:var(--shadow);}
.industry-icon{font-size:32px;margin-bottom:12px;color:var(--accent);}
.industry-card h4{font-size:15px;font-weight:700;color:var(--primary);margin-bottom:6px;}
.industry-card p{font-size:13px;color:var(--text-light);line-height:1.6;}
.cases-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.case-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s;}
.case-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);}
.case-img-wrap{overflow:hidden;aspect-ratio:4/3;background:var(--bg-alt);}
.case-img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.case-card:hover .case-img-wrap img{transform:scale(1.06);}
.case-body{padding:20px;}
.case-body h3{font-size:16px;font-weight:700;color:var(--primary);margin-bottom:6px;}
.case-body p{font-size:13px;color:var(--text-light);line-height:1.6;}
.process-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;}
.process-step{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px 16px;text-align:center;position:relative;transition:all .3s;}
.process-step:hover{border-color:var(--accent);box-shadow:var(--shadow);}
.process-step::after{content:'›';position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:var(--accent);font-size:24px;font-weight:300;}
.process-step:last-child::after{display:none;}
.process-num{width:40px;height:40px;margin:0 auto 12px;background:var(--primary);color:#fff;border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;}
.process-step h4{font-size:14px;font-weight:700;color:var(--primary);margin-bottom:4px;}
.process-step p{font-size:12px;color:var(--text-light);}
.qualification-wrap{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:50px 40px;display:grid;grid-template-columns:1fr 1.4fr;gap:50px;align-items:center;}
.qualification-img{border-radius:var(--radius);overflow:hidden;background:var(--bg-alt);padding:20px;}
.qualification-img img{width:100%;height:auto;}
.qualification-content h3{font-size:26px;font-weight:800;color:var(--primary);margin-bottom:14px;}
.qualification-content > p{font-size:15px;color:var(--text-light);line-height:1.9;margin-bottom:24px;}
.qual-list{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.qual-list li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text);font-weight:500;}
.qual-list li::before{content:'+';width:20px;height:20px;background:var(--accent);color:#fff;border-radius:2px;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0;}
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s;}
.faq-item:hover{border-color:var(--accent);}
.faq-q{padding:16px 20px;font-size:15px;font-weight:600;color:var(--primary);cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;}
.faq-q .q-icon{flex-shrink:0;width:22px;height:22px;background:var(--bg-alt);border-radius:2px;display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--accent);font-weight:700;transition:transform .3s;}
.faq-item.active .q-icon{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;padding:0 20px;font-size:14px;color:var(--text-light);line-height:1.7;}
.faq-item.active .faq-a{max-height:300px;padding:0 20px 18px;}
.about-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:50px;align-items:center;}
.about-img{border-radius:var(--radius);overflow:hidden;background:var(--bg-alt);}
.about-img img{width:100%;height:auto;}
.about-content h2{font-size:30px;font-weight:800;color:var(--primary);margin-bottom:18px;letter-spacing:-.5px;}
.about-content p{font-size:15px;color:var(--text-light);line-height:1.85;margin-bottom:14px;}
.about-features{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px;}
.about-feature{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--primary);font-weight:600;}
.about-feature::before{content:'';width:6px;height:6px;background:var(--accent);flex-shrink:0;}
.contact-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;}
.contact-info{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:36px;}
.contact-info h3{font-size:22px;font-weight:700;color:var(--primary);margin-bottom:24px;}
.contact-list{list-style:none;}
.contact-list li{display:flex;align-items:flex-start;gap:14px;padding:12px 0;border-bottom:1px solid var(--border);}
.contact-list li:last-child{border-bottom:none;}
.contact-icon{flex-shrink:0;width:36px;height:36px;background:var(--bg-alt);border-radius:4px;display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--accent);}
.contact-detail .label{font-size:12px;color:var(--text-light);margin-bottom:2px;text-transform:uppercase;letter-spacing:.5px;}
.contact-detail .value{font-size:15px;font-weight:600;color:var(--primary);}
.contact-detail .value a{color:var(--accent);}
.qr-codes{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.qr-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;}
.qr-card img{width:130px;height:130px;object-fit:cover;margin:0 auto 10px;border-radius:4px;}
.qr-card p{font-size:13px;font-weight:600;color:var(--primary);}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;}
.menu-toggle span{display:block;width:24px;height:2px;background:var(--primary);margin:5px 0;}
@media(max-width:1024px){.advantages-grid,.cases-grid,.services-grid{grid-template-columns:repeat(2,1fr);}.industries-grid{grid-template-columns:repeat(2,1fr);}.process-grid{grid-template-columns:repeat(3,1fr);}.process-step:nth-child(3)::after{display:none;}.about-grid{grid-template-columns:1fr;}.qualification-wrap{grid-template-columns:1fr;padding:30px 24px;}.contact-grid{grid-template-columns:1fr;}}
@media(max-width:768px){.banner-bg{width:100%;opacity:.3;}.banner-section{min-height:auto;}.banner-nav{flex-wrap:wrap;}.nav-menu{display:none;width:100%;flex-direction:column;gap:0;padding-top:12px;}.nav-menu.open{display:flex;}.nav-menu li{width:100%;}.nav-menu a{display:block;padding:12px 0;border-bottom:1px solid var(--border);}.menu-toggle{display:block;}.banner-title{font-size:30px;}.banner-content{padding:40px 0 50px;}.stats-grid{grid-template-columns:repeat(2,1fr);gap:20px;}.section{padding:50px 0;}.section-title{font-size:24px;}.cases-grid,.services-grid,.advantages-grid,.industries-grid,.faq-grid{grid-template-columns:1fr;}.process-grid{grid-template-columns:repeat(2,1fr);}.process-step::after{display:none;}.qual-list{grid-template-columns:1fr;}.about-features{grid-template-columns:1fr;}.footer-top{grid-template-columns:1fr;}.banner-actions{flex-direction:column;}.btn-primary,.btn-outline{width:100%;justify-content:center;}}