*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f4fbff;color:#223044;font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}a{color:#0877c9;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit}h1,h2,h3{color:#223044;line-height:1.38}h1{font-size:34px;letter-spacing:-.5px;margin:0 0 20px}h2{font-size:25px;margin:0 0 18px}h3{font-size:19px;margin:0 0 12px}p{margin:0 0 17px}img{max-width:100%}.container{max-width:1160px;margin:auto;padding:0 24px}.topbar{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid #e2eff8}.topbar-inner{max-width:1160px;height:70px;display:flex;align-items:center;gap:26px;padding:0 24px;margin:auto}.brand{display:inline-flex;align-items:center;white-space:nowrap;min-width:145px;text-decoration:none}.brand-fallback{font-weight:900;font-size:23px;letter-spacing:1px;color:#0877c9}.brand-fallback span{color:#1ca8f6}.logo-media{background:transparent!important;border:0!important;width:auto!important;min-width:0!important;margin:0!important}.brand .logo-media img{width:auto;height:37px;max-width:155px}.brand:has(img) .brand-fallback{display:none}.desktop-nav{display:flex;align-items:center;gap:23px;margin:auto}.desktop-nav a{font-size:14px;color:#223044;white-space:nowrap;border-bottom:2px solid transparent;padding:23px 0 20px}.desktop-nav a.is-active,.desktop-nav a:hover{color:#0877c9;border-bottom-color:#1ca8f6;text-decoration:none}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:78px;height:40px;padding:0 18px;background:#0877c9;color:#fff;border-radius:999px;font-weight:bold;white-space:nowrap;line-height:1;text-decoration:none}.main-btn:hover{background:#075f9f;text-decoration:none}.quick-nav{background:#eaf7ff;border-bottom:1px solid #d9ebf8}.quick-inner{max-width:1160px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:0;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.quick-inner a{display:block;padding:10px 17px;font-size:13px;color:#526b80;flex:none}.quick-inner a:first-child{padding-left:0}.quick-inner a+a{border-left:1px solid #c8e5f6}.hero,.section,.article-panel{background:#fff;border:1px solid #e1edf6;border-radius:14px;padding:30px;margin-top:27px}.eyebrow{font-size:13px;letter-spacing:2px;color:#0877c9;font-weight:700;text-transform:uppercase;margin-bottom:10px}.lead{font-size:17px;color:#526779;line-height:1.85}.hero-grid{display:grid;grid-template-columns:55fr 45fr;gap:28px;align-items:center}.hero-grid>*,.split>*,.content-grid>*{min-width:0}.media{display:flex;align-items:center;justify-content:center;width:100%;min-width:0;max-width:100%;overflow:hidden;border-radius:12px;background:#eaf7ff}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-natural img{width:100%;height:auto;max-height:280px;object-fit:contain;margin:auto}.media-banner{height:270px}.media-wide{height:215px}.media-small{height:145px}.media-device{height:310px;max-width:230px;margin:auto}.media-brand{height:105px;padding:12px}.media-placeholder{background:linear-gradient(140deg,#eaf7ff,#ddecfc);min-height:100px}.hero .media-placeholder{min-height:230px}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.topic-card{border:1px solid #e0edf6;border-radius:12px;padding:18px;background:#fbfeff;min-width:0}.topic-card h3{margin:0 0 9px}.topic-card p{font-size:14px;color:#5f7082;margin:0 0 10px}.topic-card a{font-size:14px;font-weight:bold}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.section-heading h2{margin:0}.split{display:grid;grid-template-columns:1.45fr 1fr;gap:32px;align-items:start}.split.reverse{grid-template-columns:1fr 1.3fr}.mini-list{padding-left:22px;margin:0}.mini-list li{padding:9px 0;border-bottom:1px solid #e5eef5}.link-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.link-list a{display:inline-flex;align-items:center;gap:11px;padding:8px 13px;border-radius:9px;background:#eaf7ff;font-size:14px}.link-list span{font-size:11px}.section-copy p{font-size:16px}.section-copy h2{margin-top:0}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 242px;gap:22px;align-items:start}.article-shell .article-panel{margin-top:28px}.sidebar{position:sticky;top:130px;margin-top:28px;background:#fff;border:1px solid #e1edf6;border-radius:14px;padding:18px}.sidebar h3{font-size:16px}.sidebar a{display:block;padding:9px 0;border-bottom:1px solid #edf3f8;font-size:14px}.article-content section{padding:24px 0;border-bottom:1px solid #e8f0f7}.article-content section:last-child{border:0}.article-content section h2{color:#0877c9}.article-content section p{line-height:1.85}.article-intro{padding:0 0 10px}.article-kicker{font-size:13px;color:#0877c9;font-weight:bold;letter-spacing:2px}.article-summary{background:#eaf7ff;border-left:3px solid #1ca8f6;padding:16px 20px;margin:23px 0;border-radius:0 9px 9px 0}.contents{border-radius:12px;background:#f4fbff;padding:16px 20px;margin-top:24px}.contents a{display:inline-block;margin:6px 18px 6px 0;font-size:14px}.brand-card{border:1px solid #e3edf4;padding:14px;border-radius:12px;background:#fff}.brand-card h3{font-size:16px;margin:10px 0 5px}.brand-card p{font-size:13px;line-height:1.65;color:#5f7082}.visual-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}.faq-item{padding:18px 0;border-bottom:1px solid #e2edf5}.faq-item h3{margin-bottom:7px}.footer{margin-top:45px;background:#082a46;color:#eaf8ff}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:28px;padding-top:48px;padding-bottom:38px}.footer h3{color:#fff;font-size:16px;margin:0 0 15px}.footer a{display:block;font-size:13px;margin:6px 0;color:#cbdfee}.footer-about strong{display:block;margin-top:13px}.footer-about p{font-size:13px;color:#cbdfee}.footer .logo-media img{height:34px}.footer-bottom{text-align:center;border-top:1px solid #315169;color:#cbdfee;padding:20px;font-size:12px}.menu-toggle,.mobile-drawer,.drawer-mask,.bottom-nav{display:none}.num-list{counter-reset:entry}.num-item{border-bottom:1px solid #e2edf5;padding:18px 0}.num-item:before{counter-increment:entry;content:counter(entry,decimal-leading-zero);display:inline-block;color:#0877c9;font-size:12px;font-weight:bold;margin-right:12px}.num-item h3{display:inline}.num-item p{color:#5f7082;font-size:14px;margin:5px 0 0 35px}@media(max-width:980px){.desktop-nav{display:none}.topbar-inner{height:58px;justify-content:space-between;padding:0 20px}.brand{position:absolute;left:50%;transform:translateX(-50%);min-width:0}.brand .logo-media img{height:29px;max-width:120px}.brand-fallback{font-size:19px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;background:none;border:0;width:39px;height:40px;padding:8px;cursor:pointer}.menu-toggle span{display:block;background:#223044;width:23px;height:2px}.main-btn{height:36px;min-width:70px;padding:0 12px;font-size:13px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;background:#fff;z-index:12000;overflow-y:auto;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s;padding:18px}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-mask{display:block;position:fixed;inset:0;background:rgba(8,42,70,.42);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s ease,visibility .2s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e1edf5;padding-bottom:12px}.drawer-close{border:0;background:#eaf7ff;font-size:26px;border-radius:7px;width:39px;height:39px;cursor:pointer}.mobile-drawer section{padding:15px 0;border-bottom:1px solid #e5edf5}.mobile-drawer h3{font-size:15px;color:#0877c9;margin:0 0 8px}.mobile-drawer section a{display:block;min-height:40px;padding:8px 5px;font-size:14px;color:#223044}.bottom-nav{display:grid;position:fixed;bottom:0;left:0;right:0;z-index:900;background:#fff;border-top:1px solid #dcebf5;grid-template-columns:repeat(4,1fr);height:60px}.bottom-nav a{display:flex;align-items:center;justify-content:center;font-size:14px}body{padding-bottom:60px}.article-shell{grid-template-columns:1fr}.sidebar{position:static;margin-top:0}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-about{grid-column:1/-1}.grid.four{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-grid{gap:18px}}@media(max-width:640px){body{font-size:15px}.container{padding:0 16px}.topbar-inner{padding:0 16px}.quick-inner{padding:0 16px}.hero,.section,.article-panel{padding:21px 17px;margin-top:19px}h1{font-size:26px}h2{font-size:21px}h3{font-size:17px}.lead{font-size:15px}.hero-grid,.split,.split.reverse,.visual-row{grid-template-columns:1fr}.grid.two,.grid.three,.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.two .topic-card{padding:13px}.media-banner{height:175px}.media-wide{height:160px}.media-small{height:115px}.media-brand{height:90px}.media-device{height:240px}.hero .media-placeholder{min-height:175px}.article-content section{padding:17px 0}.footer-grid{gap:17px}.topic-card p{font-size:13px}.link-list a{padding:7px 10px;font-size:13px}.section-heading{display:block}}@media(max-width:360px){.brand-fallback{font-size:17px}.brand .logo-media img{max-width:103px}.grid.four,.grid.three{gap:10px}.brand-card{padding:10px}}