/* 开云体育：无框架、自适应、原生整页滚动 */
:root{--bg:#f5fbff;--paper:#fff;--soft:#eaf7fc;--pale:#dff5fb;--mint:#25c8d1;--sky:#25b6e8;--blue:#1787db;--navy:#174b78;--heading:#173b60;--body:#2d4359;--muted:#687f93;--line:#dcebf3;--footer:#123653;--radius:18px}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:85px}body{margin:0;background:var(--bg);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--body);overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible{outline:3px solid var(--mint);outline-offset:3px}img{max-width:100%}button{font:inherit;cursor:pointer}h1,h2,h3{color:var(--heading);line-height:1.38;letter-spacing:-.02em;margin-top:0}h1{font-size:clamp(30px,3.6vw,40px)}h2{font-size:clamp(22px,2.3vw,26px)}h3{font-size:19px}p{margin:0 0 1.15em}.wrap{width:min(1160px,calc(100% - 48px));margin-inline:auto}.narrow{max-width:800px;margin-inline:auto}.eyebrow{font-weight:800;letter-spacing:.15em;color:#117ba1;font-size:13px;text-transform:uppercase}.muted{color:var(--muted)}.lead{font-size:18px;line-height:1.85;color:#3c5973}.section{padding:42px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:24px}.section-heading p{max-width:620px;margin:0}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:0 12px 32px rgba(22,73,112,.045)}.card h3{margin:0 0 10px}.card p:last-child{margin-bottom:0}.tag{display:inline-block;background:#e0f6fa;border-radius:99px;padding:3px 12px;font-size:12px;font-weight:700;color:#126f98}.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:white;font-weight:700;text-decoration:none;white-space:nowrap;box-shadow:0 6px 16px rgba(23,135,219,.15)}.main-btn:hover{color:#fff;text-decoration:none;filter:brightness(.95)}.text-link{font-weight:700}.site-header{background:white;position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line)}.header-inner{height:72px;display:flex;align-items:center;gap:18px}.brand{display:flex;align-items:center;min-width:150px;max-width:190px;color:var(--navy)}.brand-img{height:38px;max-width:185px;width:auto;object-fit:contain}.brand-type{font-size:22px;font-weight:900;line-height:1.05;color:#147cae;white-space:nowrap}.brand-type small{display:block;font-size:10px;letter-spacing:.16em;margin-top:5px}.desktop-nav{display:flex;justify-content:center;align-items:center;gap:clamp(10px,1.4vw,20px);flex:1}.desktop-nav a{font-size:14px;color:var(--navy);white-space:nowrap;font-weight:700;padding:23px 0 20px;border-bottom:3px solid transparent}.desktop-nav a.active{color:#109cb8;border-color:var(--mint)}.menu-toggle{display:none;width:42px;height:42px;border:0;background:transparent;flex-direction:column;justify-content:center;gap:5px;padding:9px}.menu-toggle span{height:2px;width:23px;background:var(--navy);display:block}.skip-link{position:fixed;left:12px;top:-100px;background:white;padding:8px;z-index:100}.skip-link:focus{top:12px}.drawer-overlay{position:fixed;inset:0;background:rgba(12,42,68,.58);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .25s,visibility .25s}.drawer{position:fixed;inset:0 auto 0 0;width:min(86vw,340px);background:white;z-index:71;transform:translateX(-103%);visibility:hidden;transition:transform .25s,visibility .25s;display:flex;flex-direction:column;box-shadow:10px 0 35px #0014}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .drawer{transform:translateX(0);visibility:visible}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--line)}.drawer-logo{max-width:160px;height:38px;object-fit:contain}.drawer-close{border:0;background:var(--soft);border-radius:10px;font-size:28px;width:40px;height:40px;color:var(--navy)}.drawer-scroll{overflow:auto;padding:12px 20px 30px}.drawer-group{border-bottom:1px solid var(--line);padding:10px 0}.drawer-group h2{font-size:13px;color:#0d889f;letter-spacing:.1em;margin:8px 0}.drawer-group a{display:block;color:var(--heading);padding:9px 8px;border-radius:8px;font-size:15px}.drawer-group a.active{background:var(--soft);color:var(--blue);font-weight:700}.media{display:flex;justify-content:center;align-items:center;width:100%;overflow:hidden;background:#eaf7fc;border-radius:12px;min-height:170px}.media--wide{aspect-ratio:1.7}.media--banner{aspect-ratio:3.1}.media--portrait{aspect-ratio:3/4;max-width:360px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-fallback{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;text-align:center;color:#417a9a;font-size:14px;padding:20px}.fallback-mark{font-size:32px;color:#24adc8}.hero{padding:55px 0 26px}.hero-grid{display:grid;grid-template-columns:1.07fr .93fr;gap:40px;align-items:center}.hero h1{margin:13px 0 20px}.hero .media{min-height:300px}.hero-actions{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:24px}.hero-note{margin-top:18px;font-size:13px;color:var(--muted)}.stat-line{display:flex;gap:22px;flex-wrap:wrap;padding-top:23px;margin-top:22px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.stat-line strong{display:block;font-size:17px;color:var(--navy)}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.article-grid{display:grid;grid-template-columns:1.65fr 1fr;gap:22px}.feature-card{background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.feature-card .copy{padding:24px}.feature-card h3{margin:10px 0}.link-list{margin:0;padding:0;list-style:none}.link-list li{padding:13px 0;border-bottom:1px solid var(--line)}.link-list li:last-child{border:0}.link-list a{display:flex;justify-content:space-between;gap:16px;color:var(--heading);font-weight:700}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.theme-tile{border:1px solid var(--line);border-radius:14px;background:white;padding:23px;display:block;color:var(--body);min-height:175px;transition:transform .2s}.theme-tile:hover{transform:translateY(-3px);text-decoration:none}.theme-tile strong{display:block;color:var(--heading);font-size:19px}.theme-tile small{display:block;color:var(--muted);font-size:14px;margin-top:12px}.tile-symbol{display:inline-grid;place-items:center;width:42px;height:42px;background:var(--soft);color:#098da7;border-radius:12px;font-weight:900;margin-bottom:12px}.page-hero{padding:48px 0 22px}.page-hero h1{margin:10px 0 14px;font-size:clamp(27px,3vw,34px)}.page-hero .lead{max-width:830px}.body-prose{max-width:800px}.body-prose p{line-height:1.85}.body-prose h2{margin-top:34px}.body-prose h3{margin-top:22px}.number-steps{counter-reset:steps;list-style:none;padding:0}.number-steps li{position:relative;padding:15px 18px 15px 65px;margin-bottom:14px;background:white;border:1px solid var(--line);border-radius:12px}.number-steps li::before{counter-increment:steps;content:counter(steps,decimal-leading-zero);position:absolute;left:18px;top:13px;color:#0d9fb8;font-weight:900;font-size:19px}.comparison{width:100%;border-collapse:collapse;background:white;border-radius:12px;overflow:hidden}.comparison th,.comparison td{border:1px solid var(--line);padding:14px 16px;text-align:left;vertical-align:top}.comparison th{background:#ddf4fb;color:var(--heading)}.split-section{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:36px}.split-section.reverse .media{order:2}.callout{border-left:5px solid var(--mint);padding:23px 28px;background:var(--soft);border-radius:0 14px 14px 0}.quote-panel{padding:32px 35px;border-radius:16px;background:linear-gradient(110deg,#164d78,#167ca0);color:white}.quote-panel h2,.quote-panel h3{color:white}.timeline{border-left:2px solid var(--mint);margin-left:14px;padding-left:28px}.timeline article{position:relative;margin-bottom:28px}.timeline article:before{content:'';position:absolute;left:-36px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--mint);border:3px solid white}.timeline h3{margin-bottom:6px}.mini-label{font-size:13px;color:#068da9;font-weight:800}.visual-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px}.visual-column{display:grid;gap:20px}.faq details{background:white;border:1px solid var(--line);border-radius:10px;padding:13px 20px;margin-bottom:10px}.faq summary{cursor:pointer;color:var(--heading);font-weight:700}.faq details p{margin:10px 0 0}.related{padding:35px 0 50px}.related-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related-list a{display:flex;justify-content:space-between;gap:15px;background:white;border:1px solid var(--line);padding:17px 18px;border-radius:12px;color:var(--heading);font-weight:700}.site-footer{background:var(--footer);color:#eaf7ff;margin-top:28px;padding:48px 0 18px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:52px}.site-footer h2{font-size:16px;color:white}.site-footer a{color:#eaf7ff}.footer-brand{display:inline-block;margin-bottom:16px}.footer-logo{max-width:180px;max-height:46px;object-fit:contain}.footer-grid nav{display:grid;gap:7px}.fine{color:#bad5e4;font-size:13px;max-width:500px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:33px;padding-top:17px;border-top:1px solid #ffffff27;font-size:12px;color:#b7d5e5}.bottom-nav{display:none}.to-top{position:fixed;right:20px;bottom:22px;border:0;background:var(--blue);color:white;width:44px;height:44px;border-radius:50%;font-size:22px;z-index:40;box-shadow:0 5px 20px #174b7844}.to-top[hidden]{display:none}
@media(max-width:1070px){.desktop-nav{gap:10px}.desktop-nav a{font-size:13px}.brand{min-width:130px}.brand-img{max-width:148px}}@media(max-width:980px){.desktop-nav{display:none}.menu-toggle{display:flex}.header-inner{justify-content:space-between;height:60px}.brand{position:absolute;left:50%;transform:translateX(-50%);min-width:0;justify-content:center;max-width:calc(100% - 250px)}.brand-img{max-height:30px;max-width:135px}.brand-type{font-size:17px}.brand-type small{font-size:8px}.header-cta{height:38px;padding:0 13px;font-size:13px}.hero-grid{gap:25px}.hero .media{min-height:220px}}@media(max-width:700px){body{font-size:15px}.wrap{width:calc(100% - 32px)}h1{font-size:29px}.hero{padding-top:26px}.hero-grid,.article-grid,.split-section,.visual-grid{grid-template-columns:1fr}.hero-grid>.media{order:-1}.hero h1{font-size:29px}.hero .media{min-height:190px;max-height:230px}.lead{font-size:16px}.section{padding:28px 0}.grid-2,.grid-3,.theme-grid,.related-list{grid-template-columns:1fr}.section-heading{display:block}.split-section.reverse .media{order:0}.page-hero{padding:28px 0 12px}.page-hero h1{font-size:27px}.card,.feature-card .copy{padding:20px}.theme-tile{min-height:auto}.comparison{font-size:13px}.comparison th,.comparison td{padding:10px}.media--portrait{max-width:260px;margin:auto}.footer-grid{grid-template-columns:1fr;gap:24px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:4px}.site-footer{padding-bottom:85px}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid var(--line);z-index:45;padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{text-align:center;padding:9px 0;color:var(--heading);font-size:13px;font-weight:700}.bottom-nav a[aria-current]{color:var(--blue)}.to-top{bottom:76px;right:12px}.quote-panel{padding:25px}.stat-line{gap:14px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}