:root{--ink:#10233f;--muted:#5d7189;--line:#dce6f0;--paper:#fff;--bg:#f2f6fa;--blue:#2877f0;--cyan:#1fb99b;--purple:#7558e9;--orange:#f28a2e;--navy:#071a37;--radius:22px;--shadow:0 14px 42px rgba(33,67,104,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 "Microsoft YaHei","PingFang SC",Arial,sans-serif;-webkit-font-smoothing:antialiased}img{display:block;max-width:100%;height:auto}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button{cursor:pointer}.container{width:min(1280px,calc(100% - 40px));margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:16px;top:12px;z-index:999;background:#fff;padding:10px 16px;border-radius:10px}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(213,226,239,.92);background:rgba(255,255,255,.94);backdrop-filter:blur(16px)}.header-inner{min-height:76px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;flex:0 0 auto}.brand img{width:220px;height:auto}.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:10px 13px}.site-nav{margin-left:auto;display:flex;gap:4px;align-items:center}.site-nav a{color:#314b67;font-size:14px;font-weight:700;padding:10px 11px;border-radius:10px;white-space:nowrap}.site-nav a:hover,.site-nav a.active{color:#1765d4;background:#eaf3ff;text-decoration:none}.top-cta{background:var(--blue)!important;color:#fff!important}
.hero{background:radial-gradient(circle at 20% 5%,#214d90 0,transparent 34%),linear-gradient(135deg,#071a37,#132e61 62%,#123e50);color:#fff;padding:72px 0 92px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 1.03fr;align-items:center;gap:46px}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:7px 11px;border-radius:999px;background:rgba(100,166,255,.14);border:1px solid rgba(129,190,255,.28);color:#c7e3ff;font-weight:800;font-size:13px;letter-spacing:.06em}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:#48deb9;box-shadow:0 0 18px #48deb9}.hero h1,.page-hero h1{font-size:clamp(38px,5vw,67px);line-height:1.14;letter-spacing:-.04em;margin:22px 0}.hero p{font-size:18px;color:#c9d9ee;max-width:680px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:12px;font-weight:800;border:1px solid transparent}.btn-primary{background:linear-gradient(135deg,#2f80ff,#4a9cf9);color:#fff;box-shadow:0 9px 28px rgba(40,119,240,.3)}.btn-secondary{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.2);color:#fff}.hero-visual{position:relative}.hero-visual img{width:100%;filter:drop-shadow(0 25px 50px rgba(0,0,0,.24))}.hero-metrics{display:flex;gap:26px;margin-top:32px}.hero-metrics b{display:block;font-size:25px;color:#fff}.hero-metrics span{font-size:13px;color:#9fb4d0}
.page-hero{padding:58px 0 54px;background:linear-gradient(135deg,#071a37,#12386f);color:#fff}.page-hero .container{display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:42px}.page-hero p{font-size:18px;color:#c8daf0;max-width:780px}.page-hero .hero-note{justify-self:end;width:min(100%,420px);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.17);border-radius:22px;padding:24px}.hero-note b{font-size:30px}.hero-note span{display:block;color:#bcd2eb}.breadcrumb{font-size:14px;display:flex;gap:9px;margin:22px 0;color:#71849a}.breadcrumb a{color:#46698e}
main section{padding:68px 0}.section-white{background:#fff}.section-head{display:flex;justify-content:space-between;gap:28px;align-items:end;margin-bottom:30px}.section-head h2{margin:0;font-size:clamp(26px,3vw,38px);line-height:1.25}.section-head p{margin:0;max-width:650px;color:var(--muted)}h2{font-size:34px;line-height:1.28;margin:0 0 20px}h3{font-size:21px;line-height:1.45;margin:0 0 10px}p{margin:0 0 1em}.lead{font-size:18px;color:#3f5872}.kicker{color:var(--blue);font-size:13px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.muted{color:var(--muted)}.small{font-size:13px}.notice{border-left:4px solid var(--orange);background:#fff8ef;padding:16px 19px;border-radius:5px 14px 14px 5px;color:#64482b}.legal-note{border:1px solid #cfe0ef;background:#f4f9fd;border-radius:16px;padding:18px;color:#45627e}.danger-note{border:1px solid #f5d0c4;background:#fff6f2;border-radius:16px;padding:18px;color:#774430}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 8px 28px rgba(23,54,87,.05)}.card:hover{border-color:#b7d1ed}.card .num{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:13px;background:#eaf3ff;color:var(--blue);font-weight:900}.card .icon{font-size:28px}.card h3{margin-top:15px}.card p{color:var(--muted)}.card-link{font-weight:800}.feature-card{position:relative;overflow:hidden;min-height:270px}.feature-card:after{content:"";position:absolute;width:170px;height:170px;border-radius:50%;right:-60px;bottom:-70px;background:linear-gradient(135deg,rgba(40,119,240,.14),rgba(53,214,180,.10))}.tag{display:inline-flex;align-items:center;padding:4px 9px;border-radius:999px;background:#edf4fb;color:#47647f;font-size:12px;font-weight:800}.tag.blue{background:#e8f2ff;color:#1766cd}.tag.green{background:#e9faf5;color:#137e68}.tag.orange{background:#fff1e4;color:#ab5b18}.tag.purple{background:#f0edff;color:#6749c8}.status-dot:before{content:"";width:7px;height:7px;border-radius:50%;background:#23b894;margin-right:6px}
.image-copy{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:42px}.image-copy.reverse{grid-template-columns:.95fr 1.05fr}.image-copy.reverse figure{order:2}.image-copy figure{margin:0}.image-copy figcaption,.media-card figcaption{font-size:13px;color:#667c92;margin-top:12px;border-left:3px solid #79a9e2;padding-left:12px}.media-card{margin:0;background:#fff;border:1px solid var(--line);border-radius:22px;padding:14px;box-shadow:var(--shadow)}.media-card img{border-radius:15px}.figure-title{display:block;color:var(--ink);font-weight:900;margin-bottom:5px}
.category-strip{margin-top:-38px;position:relative;z-index:4}.category-strip .container{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(5,1fr);overflow:hidden}.category-strip a{padding:21px;border-right:1px solid var(--line);color:var(--ink);font-weight:800}.category-strip a:last-child{border:0}.category-strip small{display:block;color:var(--muted);font-weight:400}.category-strip a:hover{background:#f6faff;text-decoration:none}
.board{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}.board-top{display:flex;justify-content:space-between;gap:20px;padding:22px 24px;border-bottom:1px solid var(--line);background:#fbfdff}.board-controls{display:flex;gap:8px;flex-wrap:wrap}.board-filter,.filter-btn{border:1px solid #cbd9e7;background:#fff;color:#45627d;border-radius:999px;padding:7px 12px;font-size:13px;font-weight:800}.board-filter.active,.filter-btn.active{background:#1e72e5;border-color:#1e72e5;color:#fff}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%;min-width:760px}th,td{text-align:left;padding:15px 17px;border-bottom:1px solid #e3ebf2;vertical-align:top}th{background:#edf4fa;color:#3d5c77;font-size:13px;white-space:nowrap}td{font-size:14px}.progress{width:110px;height:7px;background:#e5edf4;border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:linear-gradient(90deg,#2f80ff,#35d6b4);border-radius:99px}.switch{width:43px;height:24px;border:0;border-radius:99px;background:#b9c7d6;padding:3px}.switch:after{content:"";display:block;width:18px;height:18px;border-radius:50%;background:white;transition:.2s}.switch.on{background:#2d81f4}.switch.on:after{transform:translateX(19px)}
.timeline{position:relative;padding-left:34px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:#c8dbee}.timeline-item{position:relative;padding:0 0 28px 22px}.timeline-item:before{content:"";position:absolute;left:-32px;top:7px;width:15px;height:15px;border-radius:50%;background:#fff;border:4px solid var(--blue)}.timeline-item time{font-size:13px;color:var(--blue);font-weight:900}.timeline-item h3{margin:3px 0 8px}.timeline-item p{color:var(--muted)}
.article-list{display:grid;gap:26px}.news-article{background:#fff;border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:0 8px 30px rgba(20,54,86,.06)}.article-head{padding:30px 34px 22px}.article-head h2{font-size:30px}.article-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.article-body{padding:0 34px 34px}.article-body figure{margin:0 0 24px}.article-body figure img{border-radius:18px}.article-body figcaption{color:#657b91;font-size:13px;border-left:3px solid var(--blue);padding-left:13px;margin-top:12px}.article-body p{color:#324d68}.article-source{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;background:#f4f8fb;border:1px solid var(--line);border-radius:15px;padding:15px;margin:20px 0}.article-source b{display:block;font-size:12px;color:#6c8095}.article-source span,.article-source a{font-size:14px}.article-links{display:flex;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:18px}.bookmark{border:1px solid #cbd9e7;background:#fff;border-radius:10px;padding:8px 12px;color:#34516d;font-weight:800}.bookmark.saved{background:#e9faf5;color:#137e68;border-color:#a4dbc9}
.filter-bar{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:24px}.filter-item[hidden]{display:none}.device-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.device-tile{background:#fff;border:1px solid var(--line);border-radius:19px;padding:20px;min-height:185px}.device-tile h3{margin-top:15px}.device-tile p{font-size:14px;color:var(--muted)}
.faq-list{display:grid;gap:12px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.faq-question{width:100%;border:0;background:#fff;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;font-weight:900;color:var(--ink)}.faq-question:after{content:"+";font-size:23px;color:var(--blue)}.faq-question[aria-expanded=true]:after{content:"−"}.faq-answer{padding:0 20px 18px;color:var(--muted)}.faq-answer[hidden]{display:none}
.preferences{display:flex;gap:10px;flex-wrap:wrap}.preference{border:1px solid #cbd9e8;border-radius:12px;background:#fff;padding:10px 13px;color:#47637d}.preference.selected{background:#e9f7f3;border-color:#68cbb5;color:#126f5e}.download-card{padding:30px;position:relative;overflow:hidden}.download-card .platform{font-size:13px;color:var(--muted);font-weight:900;letter-spacing:.08em}.download-card h3{font-size:28px}.download-card .btn{margin-top:14px}.download-card:before{content:"";position:absolute;right:-30px;top:-30px;width:130px;height:130px;border-radius:50%;background:linear-gradient(135deg,rgba(47,128,255,.12),rgba(53,214,180,.12))}
.quiz{background:linear-gradient(135deg,#102b55,#133d67);color:#fff;border-radius:24px;padding:30px}.quiz p{color:#c9daed}.quiz-options{display:grid;gap:10px}.quiz-options button{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#fff;border-radius:12px;padding:13px;text-align:left}.quiz-options button.correct{background:#128e73}.quiz-options button.wrong{background:#a24c46}.quiz-result{margin-top:14px;font-weight:800}
.site-footer{background:#071a37;color:#b8cae0;padding:56px 0 24px}.footer-grid{display:grid;grid-template-columns:1.2fr 2fr;gap:50px}.footer-brand img{width:220px;filter:brightness(0) invert(1);opacity:.95}.footer-brand p{margin-top:18px}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 20px}.footer-links a{color:#c6d6e8;font-size:14px}.footer-note{border-top:1px solid #1b3658;margin-top:38px;padding-top:22px;font-size:13px}.footer-meta{display:flex;gap:18px;flex-wrap:wrap;margin-top:15px;color:#8fa8c3}.back-top{position:fixed;right:20px;bottom:20px;width:46px;height:46px;border-radius:50%;border:0;background:#1e72e5;color:#fff;box-shadow:0 10px 25px rgba(18,72,135,.25);display:none}.back-top.show{display:block}
@media(max-width:1050px){.menu-btn{display:block}.site-nav{display:none;position:absolute;left:20px;right:20px;top:70px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.site-nav a{padding:12px 15px}.hero-grid,.page-hero .container,.image-copy,.image-copy.reverse{grid-template-columns:1fr}.page-hero .hero-note{justify-self:start}.image-copy.reverse figure{order:0}.grid-4,.device-matrix{grid-template-columns:repeat(2,1fr)}.category-strip .container{grid-template-columns:repeat(3,1fr)}.category-strip a{border-bottom:1px solid var(--line)}.footer-grid{grid-template-columns:1fr}.hero{padding-top:52px}}
@media(max-width:760px){.container{width:min(100% - 28px,1280px)}.brand img{width:190px}.hero{padding:45px 0 74px}.hero h1,.page-hero h1{font-size:38px}.hero p,.page-hero p{font-size:16px}.hero-metrics{gap:14px;flex-wrap:wrap}.hero-metrics>div{width:45%}main section{padding:48px 0}.grid-2,.grid-3,.grid-4,.device-matrix{grid-template-columns:1fr}.section-head{display:block}.section-head p{margin-top:10px}.category-strip .container{grid-template-columns:1fr 1fr}.article-head,.article-body{padding-left:20px;padding-right:20px}.article-head h2{font-size:24px}.article-source{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.board-top{display:block}.board-controls{margin-top:12px}.download-card{padding:24px}.page-hero{padding:42px 0}.page-hero .container{display:block}.page-hero .hero-note{margin-top:24px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* bb体育项目补充样式 */
.section.alt{background:#eaf1f7}.btn.primary{background:linear-gradient(135deg,#2f80ff,#7558e9);color:#fff;box-shadow:0 9px 28px rgba(40,119,240,.3)}.btn.secondary{background:#fff;border-color:#b9cee2;color:#174b82}.hero .btn.secondary,.page-hero .btn.secondary{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.25);color:#fff}.status-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}.status{display:inline-flex;padding:5px 9px;border-radius:999px;font-size:12px;font-weight:900}.status.ok{background:#e2f8ef;color:#08725c}.status.info{background:#e7f2ff;color:#1765d4}.status.warn{background:#fff0df;color:#a75613}
.hero-visual figcaption{font-size:13px;color:#afc7e2;margin-top:10px;border-left:3px solid #47d8bc;padding-left:12px}.category-strip .container{grid-template-columns:repeat(7,1fr)}.category-strip a{text-align:center;padding:17px 9px;font-size:14px}.page-hero .hero-grid{display:grid;grid-template-columns:1fr 1fr}.page-hero .media-card{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.16)}.page-hero .media-card figcaption{color:#bcd1e7}.board{display:grid;grid-template-columns:repeat(2,1fr);gap:0}.board>div{display:grid;grid-template-columns:1fr auto;gap:4px 12px;padding:16px 18px;border-bottom:1px solid var(--line)}.board>div:nth-child(odd){border-right:1px solid var(--line)}.board>div small{grid-column:1/-1;color:var(--muted)}
.news-article{padding:32px}.news-article header{max-width:1000px}.news-article h2{font-size:clamp(25px,3vw,36px);margin-top:14px}.news-article .media-card{margin:24px 0}.article-meta span{background:#eef4f9;border-radius:999px;padding:5px 10px;font-size:12px;color:#56708a}.article-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 20px;background:#f2f7fb;border:1px solid var(--line);border-radius:16px;padding:17px 20px;margin-top:20px}.article-facts p{margin:0}.relation-note{border-left:4px solid var(--purple);background:#f6f3ff;padding:14px 17px;margin-top:16px}.filter-bar button{border:1px solid #cbd9e7;background:#fff;color:#45627d;border-radius:999px;padding:8px 13px;font-weight:800}.filter-bar button.active{background:var(--blue);color:#fff;border-color:var(--blue)}
.download-card{background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.download-card img{border-radius:14px;margin-bottom:18px}.download-card h2{font-size:27px;margin:14px 0 9px}.register-demo{display:grid;gap:15px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.register-demo label{display:grid;gap:7px;font-weight:800}.register-demo input{width:100%;border:1px solid #cbd9e7;background:#f5f8fb;color:#526b83;border-radius:11px;padding:12px}.register-demo button{width:max-content}.demo-message{min-height:1.7em;color:#1765d4;font-weight:800}.check-list{padding-left:20px}.check-list li{margin-bottom:8px}
body.dark-mode{--ink:#dbe9f7;--muted:#a8bfd4;--line:#29445f;--paper:#102942;--bg:#081c30;background:#081c30;color:#dbe9f7}body.dark-mode .card,body.dark-mode .media-card,body.dark-mode .faq-item,body.dark-mode .faq-question,body.dark-mode .board,body.dark-mode .category-strip .container,body.dark-mode .download-card,body.dark-mode .register-demo{background:#102942;color:#dbe9f7}body.font-small{font-size:14px}body.font-large{font-size:18px}
@media(max-width:1050px){.category-strip .container{grid-template-columns:repeat(4,1fr)}.page-hero .hero-grid{grid-template-columns:1fr}.article-facts{grid-template-columns:1fr}}
@media(max-width:760px){.category-strip .container{grid-template-columns:repeat(2,1fr)}.board{grid-template-columns:1fr}.board>div:nth-child(odd){border-right:0}.news-article{padding:20px}.news-article h2{font-size:25px}}

/* AI体育设备项目交互补充 */
[data-theme],[data-font]{margin:4px}.article-summary{max-width:1000px}.news-article .media-card img{aspect-ratio:16/9;object-fit:cover}.grid-3>.media-card{height:max-content}.preference:focus-visible,.filter-bar button:focus-visible,.faq-question:focus-visible{outline:3px solid #54d9c3;outline-offset:2px}