/* 开云体育 · 原生响应式样式，无外部依赖 */
:root{--bg:#f5fbff;--surface:#fff;--soft:#eaf7fc;--pale:#dff5fb;--cyan:#25c8d1;--sky:#25b6e8;--blue:#1787db;--navy:#174b78;--ink:#173b60;--body:#2d4359;--muted:#687f93;--line:#dcebf3;--footer:#123653;--radius:16px;--shadow:0 14px 44px rgba(25,93,134,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif}body.menu-open{overflow:hidden}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3{color:var(--ink);line-height:1.36;letter-spacing:-.025em}h1{font-size:34px;margin:0 0 20px}h2{font-size:25px;margin:0 0 17px}h3{font-size:19px;margin:0 0 11px}p{margin:0 0 18px}ul,ol{padding-left:1.35em}li{margin:6px 0}.container{width:min(1160px,calc(100% - 48px));margin:auto}.reading{max-width:820px}.skip{position:absolute;top:-60px;left:15px;background:white;z-index:100;padding:8px}.skip:focus{top:8px}.site-header{position:sticky;top:0;background:rgba(255,255,255,.98);box-shadow:0 1px 0 var(--line);z-index:30}.header-inner{height:72px;display:flex;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;flex-shrink:0;text-decoration:none!important}.logo-type{display:flex;flex-direction:column;line-height:1.12;white-space:nowrap}.logo-type strong{font-size:21px;color:var(--navy);letter-spacing:.03em}.logo-type small{font-size:9px;letter-spacing:.17em;color:#189fbf;margin-top:4px;font-weight:700}.brand-logo{height:38px;width:auto;background:transparent!important;min-width:0!important;border:0!important;box-shadow:none!important}.brand-logo img{max-width:190px;max-height:38px}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:17px;flex:1}.desktop-nav a{font-size:14px;font-weight:650;color:var(--navy);white-space:nowrap;padding:23px 0 21px;border-bottom:3px solid transparent}.desktop-nav a:hover,.desktop-nav [aria-current=page]{color:#087aa9;border-bottom-color:var(--cyan);text-decoration:none}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:82px;height:42px;padding:0 20px;border-radius:999px;background:linear-gradient(110deg,#25c8d1,#25b6e8,#1787db);color:#fff;font-weight:700;white-space:nowrap;text-decoration:none!important;box-shadow:0 6px 18px rgba(23,135,219,.17)}.main-btn:hover{filter:brightness(.94)}.menu-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:white}.menu-toggle span{height:2px;width:19px;background:var(--navy);border-radius:3px}.drawer{position:fixed;top:0;bottom:0;left:0;width:min(86vw,340px);z-index:51;background:white;box-shadow:8px 0 40px rgba(9,42,70,.17);overflow:auto;transform:translateX(-105%);visibility:hidden;transition:transform .22s,visibility .22s;padding:17px 21px}.drawer.is-open{transform:translateX(0);visibility:visible}.drawer-shade{position:fixed;inset:0;z-index:50;background:rgba(15,37,55,.54);visibility:hidden;opacity:0;pointer-events:none;transition:opacity .22s,visibility .22s}.drawer-shade.is-open{visibility:visible;opacity:1;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:20px}.drawer-close{font-size:28px;line-height:1;width:38px;height:38px;background:var(--soft);border:0;border-radius:9px;color:var(--navy)}.drawer nav p{font-weight:800;color:var(--navy);font-size:13px;margin:22px 0 5px}.drawer nav a{display:block;color:var(--body);font-size:15px;padding:9px 5px;border-bottom:1px solid var(--line)}.nojs-nav{display:flex;flex-wrap:wrap;gap:12px;padding:12px 18px;background:#eaf7fc}.mobile-bottom{display:none}.hero{padding:54px 0 38px}.hero-panel{background:linear-gradient(120deg,#e1f9fc 0%,#f8fdff 58%,#e9f4ff 100%);border:1px solid #d4eaf5;border-radius:24px;min-height:340px;display:grid;grid-template-columns:1.12fr .88fr;align-items:center;overflow:hidden}.hero-copy{padding:48px 20px 48px 48px}.eyebrow{color:#087faa;font-weight:800;text-transform:uppercase;letter-spacing:.13em;font-size:12px;display:block;margin-bottom:13px}.hero h1{font-size:39px;max-width:550px}.hero p{max-width:555px;font-size:17px}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:26px}.text-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 20px;border:1px solid #afd8e9;background:white;border-radius:50px;color:var(--navy);font-weight:700}.media{position:relative;display:flex;align-items:center;justify-content:center;background:var(--soft);width:100%;overflow:hidden;border-radius:12px;min-height:145px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.hero-media{height:320px;min-height:0;border-radius:0;background:transparent}.hero-media img{max-height:300px}.media-pattern{position:absolute;inset:0;background:radial-gradient(circle at 65% 40%,rgba(37,200,209,.23),transparent 34%),radial-gradient(circle at 30% 70%,rgba(23,135,219,.18),transparent 30%),repeating-linear-gradient(115deg,transparent 0 29px,rgba(37,182,232,.045) 29px 30px)}.media-pattern:after{content:'';position:absolute;width:42%;aspect-ratio:1;border-radius:50%;border:2px solid rgba(37,182,232,.24);top:24%;left:30%;box-shadow:0 0 0 28px rgba(37,200,209,.07),0 0 0 63px rgba(37,182,232,.04)}section.section{margin:32px auto 48px}.section-heading{max-width:760px;margin-bottom:22px}.section-heading p{color:var(--muted)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:19px}.topic-card,.feature,.mini-card,.article-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.topic-card{display:block;padding:24px;color:inherit;transition:transform .16s,border-color .16s}.topic-card:hover{transform:translateY(-3px);border-color:#8cd9e9;text-decoration:none}.topic-card h3{margin:0 0 8px}.topic-card p{font-size:14px;margin:0 0 14px;color:var(--muted)}.topic-card .go{color:#087ea9;font-weight:700;font-size:13px}.feature{padding:28px}.feature .media{height:205px;margin-bottom:18px}.feature p{color:var(--muted)}.feature a{font-weight:700}.strip{padding:30px;background:linear-gradient(105deg,#174b78,#197ab0);color:white;border-radius:18px;display:flex;align-items:center;justify-content:space-between;gap:20px}.strip h2{color:#fff}.strip p{margin:0;color:#d7eef8}.strip .text-btn{white-space:nowrap}.article-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.article-list a{display:block;background:white;border:1px solid var(--line);border-radius:11px;padding:16px 19px;color:var(--ink);font-weight:650}.article-list a span{display:block;font-size:12px;color:#0689a3;font-weight:800;letter-spacing:.05em}.article-list a:hover{border-color:var(--cyan);text-decoration:none}.page-intro{padding:47px 0 22px}.page-intro p{font-size:17px;max-width:800px}.page-intro .eyebrow{margin-bottom:10px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:35px;align-items:start}.article{min-width:0}.article section{margin:22px 0 39px}.article h2{padding-top:6px}.article h3{margin-top:22px}.article p{line-height:1.83}.article-lead{font-size:18px;color:var(--navy);border-left:4px solid var(--cyan);padding:9px 0 9px 18px;background:linear-gradient(90deg,#e8f8fc,transparent)}.article .media{height:275px;margin:20px 0 26px}.side-nav{position:sticky;top:104px;background:white;border:1px solid var(--line);border-radius:14px;padding:20px}.side-nav h2{font-size:16px}.side-nav a{display:block;font-size:14px;padding:9px 0;border-bottom:1px solid var(--line);color:var(--navy)}.side-nav a:last-child{border-bottom:0}.article-panel{padding:26px}.article-panel h2{margin-top:0}.comparison{display:grid;grid-template-columns:1fr 1fr;gap:17px}.comparison>div{border:1px solid var(--line);border-radius:13px;background:white;padding:22px}.comparison p:last-child{margin-bottom:0}.callout{border-left:4px solid var(--cyan);background:var(--soft);padding:17px 22px;border-radius:0 12px 12px 0;margin:24px 0}.table-scroll{overflow-x:auto;margin:21px 0 26px;border:1px solid var(--line);border-radius:12px}table{width:100%;border-collapse:collapse;background:white;font-size:15px;min-width:540px}th{background:#e6f6fb;color:var(--navy);font-weight:800;text-align:left}th,td{padding:12px 15px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border-bottom:0}.timeline{border-left:2px solid #8fdce9;margin:20px 0 25px;padding-left:25px}.timeline>div{position:relative;margin-bottom:23px}.timeline>div:before{content:'';position:absolute;left:-32px;top:10px;width:11px;height:11px;border:3px solid white;border-radius:50%;background:var(--sky);box-shadow:0 0 0 1px var(--sky)}.timeline h3{margin-top:0}.number-list{counter-reset:n;list-style:none;padding:0}.number-list li{position:relative;counter-increment:n;padding:14px 16px 14px 57px;background:white;border:1px solid var(--line);border-radius:10px;margin:12px 0}.number-list li:before{content:counter(n,decimal-leading-zero);position:absolute;left:16px;top:14px;color:#078eac;font-weight:800}.glossary{display:grid;grid-template-columns:1fr 1fr;gap:12px}.glossary div{padding:17px;background:white;border:1px solid var(--line);border-radius:12px}.glossary dt{color:var(--ink);font-weight:800}.glossary dd{margin:5px 0 0;font-size:14px}.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.gallery figure{margin:0;background:white;border:1px solid var(--line);padding:12px;border-radius:13px}.gallery .media{height:205px;margin:0 0 12px}.gallery figcaption{font-size:14px;padding:3px 5px 9px}.faq details{background:white;border:1px solid var(--line);border-radius:11px;margin-bottom:10px;padding:13px 17px}.faq summary{font-weight:750;color:var(--ink);cursor:pointer}.faq p{margin:12px 0 3px;font-size:15px}.related{margin:40px 0 60px;border-top:1px solid var(--line);padding-top:25px}.related h2{font-size:22px}.related-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.related-links a{padding:17px;background:white;border:1px solid var(--line);border-radius:12px;color:var(--ink);font-weight:700;display:flex;justify-content:space-between;gap:8px}.related-links a span{color:var(--blue)}.site-footer{background:var(--footer);color:#eaf7ff;padding:47px 0 20px}.site-footer h2{color:#fff;font-size:17px}.site-footer .logo-type strong{color:#fff}.site-footer .logo-type small{color:#9fe7f7}.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:45px}.footer-brand p{margin-top:16px}.site-footer p{color:#d0e4ef;font-size:14px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:6px 15px}.footer-links a,.footer-more{color:#eaf7ff;font-size:14px}.footer-bottom{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.16);margin-top:30px;padding-top:16px;font-size:12px;color:#c7dce8}.to-top{position:fixed;right:20px;bottom:22px;z-index:22;opacity:0;pointer-events:none;background:var(--navy);border:0;border-radius:50%;color:white;width:42px;height:42px;transition:opacity .2s}.to-top.visible{opacity:1;pointer-events:auto}
@media(max-width:1100px){.desktop-nav{gap:10px}.desktop-nav a{font-size:13px}.header-inner{gap:15px}}
@media(max-width:980px){.site-header .desktop-nav{display:none}.menu-toggle{display:flex}.header-inner{height:60px;justify-content:space-between;position:relative}.header-inner>.brand{position:absolute;left:50%;transform:translateX(-50%)}.header-cta{margin-left:auto;height:40px;min-width:75px;font-size:13px;padding:0 15px}.brand-logo{height:29px}.brand-logo img{max-height:29px;max-width:145px}.logo-type strong{font-size:18px}.logo-type small{font-size:8px}.page-layout{grid-template-columns:1fr}.side-nav{position:static;display:flex;flex-wrap:wrap;gap:4px 15px}.side-nav h2{width:100%}.side-nav a{border-bottom:0;padding:5px}.hero{padding-top:28px}.hero h1{font-size:32px}.hero-copy{padding:35px 26px}.footer-grid{gap:24px}}
@media(max-width:680px){body{font-size:15px}.container{width:calc(100% - 32px)}h1{font-size:27px}h2{font-size:21px}h3{font-size:18px}.hero-panel{grid-template-columns:1fr}.hero-copy{order:2;padding:24px 20px 28px}.hero-media{order:1;height:210px}.hero h1{font-size:29px}.hero p{font-size:15px}.hero-actions{margin-top:18px}.grid-3,.grid-2,.article-list,.comparison,.glossary,.gallery,.related-links{grid-template-columns:1fr}.feature{padding:19px}.feature .media{height:170px}.topic-card{padding:19px}.page-intro{padding-top:29px}.page-intro p{font-size:15px}.article .media{height:190px}.article-panel{padding:18px}.section.section{margin:26px auto 33px}.strip{padding:23px;display:block}.strip .text-btn{margin-top:18px}.footer-grid{grid-template-columns:1fr;gap:24px}.footer-bottom{display:block}.footer-bottom span{display:block}.site-footer{padding-bottom:91px}.mobile-bottom{position:fixed;z-index:29;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);padding-bottom:env(safe-area-inset-bottom);background:white;box-shadow:0 -2px 18px rgba(23,75,120,.09);border-top:1px solid var(--line)}.mobile-bottom a{display:flex;flex-direction:column;align-items:center;justify-content:center;height:55px;font-size:11px;line-height:1.4;color:var(--muted)}.mobile-bottom a b{font-size:20px;font-weight:500}.mobile-bottom a[aria-current=page]{color:var(--blue);font-weight:800}.to-top{bottom:75px}.drawer{padding-bottom:80px}.footer-links{max-width:360px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}