*{margin:0;padding:0;box-sizing:border-box}
:root{--ibm-blue:#0f62fe;--ibm-dark:#161616;--ibm-gray:#f4f4f4;--ibm-cyan:#1192e8;--text:#161616;--text2:#525252;--white:#fff}
body{font-family:"IBM Plex Sans","PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);line-height:1.7;background:#fff}
a{text-decoration:none;color:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.time-bar{background:var(--ibm-dark);color:#c6c6c6;font-size:12px;padding:6px 0;border-bottom:1px solid #262626}
.time-bar-inner{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;justify-content:space-between;align-items:center}
.tb-status::before{content:"";display:inline-block;width:7px;height:7px;background:#42be65;border-radius:50%;margin-right:8px;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.site-header{background:#fff;position:sticky;top:0;z-index:100;transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 2px 8px rgba(0,0,0,.08)}
.nav-wrap{display:flex;align-items:center;height:64px;gap:40px}
.logo{font-size:24px;font-weight:700;color:var(--ibm-dark);letter-spacing:-.5px}
.logo span{color:var(--ibm-blue)}
.main-nav ul{display:flex;list-style:none;gap:4px}
.main-nav a{display:block;padding:8px 16px;font-size:15px;color:var(--text);font-weight:400;transition:color .2s}
.main-nav a:hover,.main-nav a.active{color:var(--ibm-blue)}
.btn-nav-cta{margin-left:auto;background:var(--ibm-blue);color:#fff;padding:10px 24px;font-size:14px;font-weight:600;transition:background .2s}
.btn-nav-cta:hover{background:#0353e9}
/* Hero */
.ibm-hero{background:linear-gradient(135deg,#161616 0%,#1d2b4d 60%,#0f62fe 100%);color:#fff;padding:100px 0 110px;position:relative;overflow:hidden}
.ibm-hero::after{content:"";position:absolute;right:-100px;top:-100px;width:500px;height:500px;border:1px solid rgba(255,255,255,.08);border-radius:50%}
.ibm-hero .container{position:relative;z-index:2}
.hero-tag{display:inline-block;background:rgba(15,98,254,.25);border:1px solid rgba(15,98,254,.5);padding:4px 14px;font-size:13px;color:#a6c8ff;margin-bottom:24px;letter-spacing:1px}
.ibm-hero h1{font-size:48px;font-weight:700;line-height:1.25;max-width:760px;margin-bottom:20px;letter-spacing:-1px}
.ibm-hero .hero-sub{font-size:19px;color:#c1c7cd;max-width:680px;margin-bottom:36px;line-height:1.7}
.hero-cta-row{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--ibm-blue);color:#fff;padding:14px 32px;font-size:16px;font-weight:600;display:inline-block;transition:background .2s}
.btn-primary:hover{background:#0353e9}
.btn-outline{border:1px solid #fff;color:#fff;padding:14px 32px;font-size:16px;display:inline-block;transition:all .2s}
.btn-outline:hover{background:#fff;color:var(--ibm-dark)}
/* 资讯轮播 */
.ibm-news{background:var(--ibm-gray);padding:56px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:32px}
.section-head h2{font-size:30px;font-weight:700;color:var(--ibm-dark)}
.section-head .more{color:var(--ibm-blue);font-size:14px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;padding:28px;border-top:3px solid var(--ibm-blue);transition:transform .2s,box-shadow .2s}
.news-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.news-card .date{font-size:13px;color:#8d8d8d;margin-bottom:10px}
.news-card h3{font-size:17px;font-weight:600;line-height:1.5;margin-bottom:10px;color:var(--ibm-dark)}
.news-card p{font-size:14px;color:var(--text2);line-height:1.6}
/* 为您推荐 */
.ibm-recommend{padding:70px 0;background:#fff}
.rec-grid{display:grid;grid-template-columns:340px 1fr;gap:48px;align-items:start}
.rec-contact{background:var(--ibm-dark);color:#fff;padding:36px}
.rec-contact h3{font-size:20px;margin-bottom:12px}
.rec-contact .phone{font-size:30px;font-weight:700;color:#a6c8ff;margin:16px 0}
.rec-contact p{font-size:14px;color:#c1c7cd}
.rec-cases h2{font-size:28px;margin-bottom:28px;color:var(--ibm-dark)}
.case-item{padding:24px 0;border-bottom:1px solid #e0e0e0}
.case-item:last-child{border-bottom:none}
.case-item h3{font-size:18px;margin-bottom:8px;color:var(--ibm-dark)}
.case-item p{font-size:14px;color:var(--text2)}
/* 产品服务矩阵 - IBM核心模块 */
.ibm-products{background:var(--ibm-gray);padding:70px 0}
.ibm-products> .container> h2{font-size:32px;text-align:center;margin-bottom:8px;color:var(--ibm-dark)}
.ibm-products> .container> .lead{text-align:center;color:var(--text2);font-size:16px;margin-bottom:48px}
.product-matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#dcdcdc;border:1px solid #dcdcdc}
.pm-cell{background:#fff;padding:30px;transition:background .2s}
.pm-cell:hover{background:#edf5ff}
.pm-cell .pm-icon{width:40px;height:40px;background:var(--ibm-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;margin-bottom:16px}
.pm-cell h3{font-size:17px;font-weight:600;margin-bottom:8px;color:var(--ibm-dark)}
.pm-cell p{font-size:13.5px;color:var(--text2);line-height:1.6}
/* 数据区 */
.ibm-stats{background:var(--ibm-dark);color:#fff;padding:70px 0}
.ibm-stats h2{font-size:30px;text-align:center;margin-bottom:56px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item .num{font-size:48px;font-weight:700;color:#a6c8ff;line-height:1}
.stat-item .label{font-size:14px;color:#c1c7cd;margin-top:12px}
/* 步骤 */
.ibm-steps{padding:70px 0;background:#fff}
.ibm-steps h2{font-size:30px;text-align:center;margin-bottom:56px;color:var(--ibm-dark)}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.step-card{position:relative;padding:32px 24px;background:var(--ibm-gray);border-bottom:3px solid var(--ibm-blue)}
.step-card .step-num{font-size:40px;font-weight:700;color:var(--ibm-blue);opacity:.3;line-height:1}
.step-card h3{font-size:18px;margin:12px 0 10px;color:var(--ibm-dark)}
.step-card p{font-size:14px;color:var(--text2)}
/* 公司三栏 */
.ibm-company{padding:70px 0;background:var(--ibm-gray)}
.company-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.company-card{background:#fff;padding:36px}
.company-card h3{font-size:20px;margin-bottom:14px;color:var(--ibm-dark)}
.company-card p{font-size:14px;color:var(--text2);margin-bottom:20px}
.company-card a{color:var(--ibm-blue);font-size:14px;font-weight:600}
/* FAQ */
.ibm-faq{padding:70px 0;background:#fff}
.ibm-faq h2{font-size:30px;text-align:center;margin-bottom:48px;color:var(--ibm-dark)}
.faq-item{border-bottom:1px solid #e0e0e0;padding:20px 0}
.faq-item summary{font-size:17px;font-weight:600;cursor:pointer;color:var(--ibm-dark);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:"+";font-size:24px;color:var(--ibm-blue);font-weight:300}
.faq-item[open] summary::after{content:"−"}
.faq-item p{margin-top:14px;font-size:15px;color:var(--text2);line-height:1.8}
/* 订阅 */
.ibm-subscribe{background:var(--ibm-blue);color:#fff;padding:60px 0;text-align:center}
.ibm-subscribe h2{font-size:28px;margin-bottom:12px}
.ibm-subscribe p{font-size:15px;opacity:.9;margin-bottom:28px}
.ibm-subscribe .sub-row{display:flex;gap:12px;max-width:520px;margin:0 auto}
.ibm-subscribe input{flex:1;padding:14px 18px;border:none;font-size:15px}
.ibm-subscribe button{background:var(--ibm-dark);color:#fff;border:none;padding:14px 32px;font-size:15px;font-weight:600;cursor:pointer}
/* 内页通用 */
.page-hero{background:linear-gradient(135deg,#161616,#0f62fe);color:#fff;padding:64px 0}
.page-hero h1{font-size:38px;margin-bottom:12px}
.page-hero p{font-size:17px;color:#c1c7cd;max-width:700px}
.content-section{padding:60px 0}
.content-block{margin-bottom:40px}
.content-block h2{font-size:24px;color:var(--ibm-dark);margin-bottom:16px;padding-left:14px;border-left:4px solid var(--ibm-blue)}
.content-block h3{font-size:19px;margin:20px 0 10px;color:var(--ibm-dark)}
.content-block p{font-size:15px;color:var(--text2);margin-bottom:14px;line-height:1.9}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.price-card{border:1px solid #e0e0e0;padding:36px 28px;text-align:center;transition:box-shadow .2s}
.price-card.featured{border:2px solid var(--ibm-blue);position:relative}
.price-card.featured::before{content:"推荐";position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--ibm-blue);color:#fff;padding:2px 16px;font-size:12px}
.price-card h3{font-size:20px;margin-bottom:8px}
.price-card .price{font-size:42px;font-weight:700;color:var(--ibm-blue);margin:16px 0}
.price-card .price small{font-size:14px;color:var(--text2);font-weight:400}
.price-card ul{list-style:none;margin:24px 0;text-align:left}
.price-card li{padding:8px 0;font-size:14px;color:var(--text2);border-bottom:1px solid #f0f0f0}
.price-card li::before{content:"✓ ";color:var(--ibm-blue);font-weight:700}
.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.dl-card{display:flex;gap:20px;align-items:center;padding:28px;border:1px solid #e0e0e0;transition:border-color .2s}
.dl-card:hover{border-color:var(--ibm-blue)}
.dl-icon{width:60px;height:60px;background:var(--ibm-gray);display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.dl-card h3{font-size:18px;margin-bottom:4px}
.dl-card p{font-size:13px;color:var(--text2);margin-bottom:8px}
.dl-card a{color:var(--ibm-blue);font-size:14px;font-weight:600}
.site-footer{background:var(--ibm-dark);color:#a8a8a8;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer-logo{font-size:22px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-logo span{color:var(--ibm-blue)}
.footer-brand p{font-size:13px;line-height:1.7}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:13px;color:#a8a8a8;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-col p{font-size:13px;margin-bottom:8px}
.footer-bottom{border-top:1px solid #393939;padding:20px 0;display:flex;justify-content:space-between;font-size:12px}
@media(max-width:900px){.news-grid,.product-matrix,.stats-grid,.steps-grid,.company-grid,.price-grid,.dl-grid,.rec-grid,.footer-grid{grid-template-columns:1fr}.ibm-hero h1{font-size:32px}.main-nav{display:none}}