/* NANGONG 28 — independent responsive design; no external resources */
:root{--bg:#F6FBFF;--paper:#fff;--soft:#EFF8FF;--blue:#2AA9E0;--bright:#53C2F2;--navy:#244C78;--title:#1C3552;--body:#31485F;--muted:#6B8299;--purple:#6B4FAF;--gold:#D9B15B;--border:rgba(42,169,224,.16);--shadow:0 10px 32px rgba(23,69,112,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8;overflow-x:hidden}button,a{ -webkit-tap-highlight-color:transparent}a{color:var(--navy);text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible{outline:3px solid var(--purple);outline-offset:3px}img{max-width:100%}button{font:inherit;cursor:pointer}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:1000;background:#fff;box-shadow:0 2px 12px rgba(31,79,123,.055)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:70px}.brand{display:flex;align-items:center;min-width:145px;gap:9px;white-space:nowrap}.brand-image{display:flex;align-items:center;justify-content:center;height:38px;max-width:145px}.brand-image img{display:block;width:auto;max-width:145px;height:auto;max-height:38px;object-fit:contain}.brand-image .media-placeholder{display:none}.brand-fallback{display:flex;flex-direction:column;line-height:1.12}.brand-fallback b{font-size:20px;color:var(--title)}.brand-fallback b span{color:var(--purple)}.brand-fallback small{font-size:9px;letter-spacing:1.1px;color:var(--muted)}.brand:has(.brand-image img) .brand-fallback{display:none}.main-nav{display:flex;align-items:stretch;gap:clamp(10px,1.65vw,24px);height:70px}.nav-link{display:inline-flex;align-items:center;position:relative;font-weight:600;color:var(--navy);font-size:14px;white-space:nowrap}.nav-link::after{position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--blue);content:"";transform:scaleX(0);transition:transform .2s}.nav-link:hover::after,.nav-link.is-current::after{transform:scaleX(1)}.nav-link.is-current{color:var(--blue)}.main-btn{display:inline-flex;align-items:center;justify-content:center;min-width:82px;height:40px;padding:0 18px;border-radius:999px;background:linear-gradient(135deg,#53C2F2 0%,#2AA9E0 55%,#6B4FAF 100%);color:#fff!important;font-weight:700;white-space:nowrap;box-shadow:0 5px 14px rgba(42,169,224,.2)}.main-btn:hover{filter:brightness(.96)}.channel-bar{height:45px;background:#EFF8FF;border-bottom:1px solid var(--border)}.channel-inner{display:flex;gap:30px;align-items:center;overflow-x:auto;scrollbar-width:none;white-space:nowrap;height:45px}.channel-inner::-webkit-scrollbar{display:none}.channel-link{flex-shrink:0;font-size:13px;font-weight:600;color:#58718E}.channel-link.is-current,.channel-link:hover{color:var(--blue)}.menu-toggle{display:none}.site-main{min-height:50vh;padding-bottom:55px}.hero{padding:38px 0 18px}.eyebrow{display:inline-flex;align-items:center;gap:9px;font-weight:700;letter-spacing:.12em;font-size:12px;color:var(--blue);text-transform:uppercase}.eyebrow:before{content:"";height:5px;width:21px;background:linear-gradient(90deg,var(--blue),var(--purple));border-radius:5px}.hero h1,.page-lead h1{font-weight:800;line-height:1.35;letter-spacing:-.6px;color:var(--title);margin:11px 0 13px}.hero h1{font-size:36px}.hero p{max-width:780px;margin:0 0 24px;font-size:16px;color:var(--muted)}.hero-visual{border-radius:15px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border)}.media{display:flex;align-items:center;justify-content:center;width:100%;overflow:hidden;border-radius:12px;background:#EFF8FF;position:relative}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-banner{aspect-ratio:16/7}.media-wide{aspect-ratio:16/9}.media-square{aspect-ratio:1/1}.media-device{aspect-ratio:9/16;max-width:245px}.media-placeholder{display:flex;width:100%;height:100%;align-items:center;justify-content:center;background:radial-gradient(circle at 25% 25%,rgba(83,194,242,.23),transparent 46%),linear-gradient(130deg,#F2FAFF,#E5F3FF 55%,#F6F3FF)}.placeholder-orbit{height:38%;aspect-ratio:1;border:2px solid rgba(42,169,224,.22);border-radius:50%;box-shadow:0 0 0 25px rgba(42,169,224,.055),0 0 0 62px rgba(107,79,175,.025)}.hero-visual .media{border-radius:0;max-height:320px}.site-section{margin-top:40px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:17px}.section-heading h2{font-size:25px;line-height:1.4;color:var(--title);margin:0}.section-heading p{margin:5px 0 0;color:var(--muted);font-size:14px}.text-link{font-size:14px;font-weight:700;color:var(--blue);white-space:nowrap}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.feature-card,.surface{background:var(--paper);border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.feature-card{display:flex;flex-direction:column;min-height:180px;padding:21px;transition:transform .2s,box-shadow .2s}.feature-card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(23,69,112,.12)}.card-index{color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.13em}.feature-card h3{font-size:18px;color:var(--title);margin:7px 0 4px}.feature-card p{color:var(--muted);margin:0 0 15px;font-size:14px;line-height:1.65}.card-more{color:var(--blue);font-size:13px;font-weight:700;margin-top:auto}.split{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;align-items:center}.split.reverse{grid-template-columns:1fr 1.1fr}.split>.surface{padding:24px}.split h3{font-size:22px;color:var(--title);margin:0 0 12px}.split p{margin:0 0 12px}.inline-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}.inline-links a{border:1px solid var(--border);background:#f4fbff;border-radius:99px;padding:5px 13px;font-weight:600;font-size:13px}.two-cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.knowledge-box{background:#fff;border:1px solid var(--border);border-radius:13px;padding:24px}.knowledge-box h3{margin:0 0 10px;font-size:20px;color:var(--title)}.knowledge-box p{margin:0 0 14px}.mini-list{list-style:none;padding:0;margin:0}.mini-list li{border-bottom:1px solid var(--border);padding:12px 0}.mini-list li:last-child{border-bottom:0}.mini-list a{font-weight:600;color:var(--navy)}.mini-list small{display:block;color:var(--muted);font-size:13px}.gallery-preview{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.gallery-tile{padding:10px;background:#fff;border-radius:13px;border:1px solid var(--border)}.gallery-tile .media{border-radius:8px}.gallery-tile h3{margin:10px 3px 0;font-size:15px;color:var(--title)}.gallery-tile p{margin:2px 3px 6px;color:var(--muted);font-size:12px}.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.news-entry{display:flex;gap:15px;padding:16px 18px;background:#fff;border:1px solid var(--border);border-radius:12px}.news-number{font-size:19px;color:var(--blue);font-weight:800}.news-entry h3{margin:0 0 3px;font-size:16px;color:var(--title)}.news-entry p{margin:0;color:var(--muted);font-size:13px;line-height:1.65}.mobile-feature{display:flex;gap:35px;align-items:center;background:linear-gradient(125deg,#fff,#edf8ff);border-radius:15px;padding:25px;border:1px solid var(--border)}.mobile-feature .media-device{flex:0 0 190px}.mobile-feature h3{font-size:23px;color:var(--title);margin:0 0 10px}.mobile-feature p{margin:0 0 14px}.notice{border-left:4px solid var(--blue);background:#ecf7ff;border-radius:0 12px 12px 0;padding:16px 20px;color:var(--navy)}.page-lead{padding:41px 0 22px}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--muted)}.page-lead h1{font-size:32px;margin-top:10px}.page-lead>p{margin:0;max-width:780px;color:var(--muted)}.article-grid{display:grid;grid-template-columns:minmax(0,790px) minmax(220px,1fr);align-items:start;gap:26px}.article-body{padding:28px 31px}.reading-section{padding-bottom:20px;margin-bottom:24px;border-bottom:1px solid var(--border)}.reading-section:last-of-type{border-bottom:0;margin-bottom:0}.reading-section h2{font-size:23px;line-height:1.45;color:var(--title);margin:0 0 15px}.reading-section p{font-size:16px;line-height:1.85;margin:0 0 16px}.article-intro{border-left:3px solid var(--blue);padding-left:16px;margin-bottom:30px;color:var(--muted)}.article-aside{position:sticky;top:140px;padding:22px}.article-aside h2{font-size:17px;margin:0 0 12px;color:var(--title)}.article-aside a{display:block;border-top:1px solid var(--border);padding:11px 0;font-size:14px}.article-aside .aside-note{margin-top:20px;background:var(--soft);padding:13px;border-radius:9px;font-size:13px;color:var(--muted)}.related-block{padding-top:16px}.related-block h2{color:var(--title);font-size:20px}.related-links{display:flex;gap:10px;flex-wrap:wrap}.related-links a{background:var(--soft);border-radius:7px;padding:8px 13px;font-weight:600;font-size:14px}.faq-entry{padding:17px 0;border-bottom:1px solid var(--border)}.faq-entry h2{font-size:18px;margin:0 0 5px;color:var(--title)}.faq-entry p{margin:0}.gallery-full{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:20px 0}.gallery-full figure{margin:0;padding:15px;border:1px solid var(--border);border-radius:13px;background:#fff}.gallery-full figcaption{padding:10px 2px 0}.gallery-full strong{display:block;color:var(--title)}.gallery-full span{display:block;color:var(--muted);font-size:13px}.section-caption{color:var(--muted);font-size:13px}.site-footer{background:#16324F;color:#E8F5FF;padding-top:46px}.footer-grid{display:grid;grid-template-columns:1.45fr 1fr 1fr 1fr;gap:35px;padding-bottom:36px}.footer-grid>div{min-width:0}.footer-grid h2{font-size:15px;color:#fff;margin:2px 0 14px}.footer-grid a{display:block;font-size:13px;color:#c5e4f7;margin:6px 0}.footer-grid a:hover{color:#fff}.footer-grid p{font-size:13px;color:#c5e4f7;line-height:1.9;max-width:290px}.footer-brand{font-size:24px;line-height:1.2;color:#fff;font-weight:800}.footer-brand span{color:#E0BF70}.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid rgba(255,255,255,.12);padding:16px 0 23px;font-size:12px;color:#b7d9ee}.footer-bottom p{margin:0;max-width:780px;text-align:right}.mobile-bottom{display:none}.back-top{position:fixed;right:20px;bottom:25px;width:39px;height:39px;border:1px solid var(--border);border-radius:100%;background:#fff;color:var(--navy);box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:500}.back-top.show{opacity:1;visibility:visible}.mobile-drawer,.drawer-mask{display:none}
@media(max-width:980px){.container{width:calc(100% - 40px)}.header-inner{min-height:59px;gap:10px}.main-nav{display:none}.menu-toggle{display:flex;width:39px;height:38px;border:0;background:transparent;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0;flex:0 0 39px}.menu-toggle span{display:block;width:20px;height:2px;background:var(--navy);border-radius:2px}.brand{min-width:0;margin-inline:auto;justify-content:center}.brand-image{height:29px;max-width:108px}.brand-image img{max-width:108px;max-height:29px}.brand-fallback b{font-size:18px}.brand-fallback small{font-size:8px}.signup{height:36px;min-width:65px;padding:0 13px;font-size:13px}.channel-inner{gap:22px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100vh;height:100dvh;overflow-y:auto;background:#fff;z-index:12000;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .2s ease,visibility .2s}.mobile-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-mask{display:block;position:fixed;inset:0;background:rgba(28,73,114,.36);z-index:11000;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}body.drawer-open{overflow:hidden}.drawer-heading{display:flex;align-items:center;justify-content:space-between;background:#16324F;color:#fff;padding:14px 18px}.drawer-logo{font-weight:800;color:#fff;font-size:20px}.drawer-logo strong{color:#E0BF70}.drawer-close{background:transparent;border:0;color:#fff;font-size:30px;line-height:1}.drawer-group{padding:15px 19px 5px}.drawer-group h2{margin:0 0 10px;color:var(--blue);font-size:13px}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:4px}.drawer-links a{display:block;font-size:13px;padding:7px 6px;border-radius:6px;color:var(--navy)}.drawer-links a.is-current{background:#e8f7ff;color:var(--blue)}.mobile-bottom{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:950;background:#fff;border-top:1px solid var(--border);height:60px;justify-content:space-around;padding-bottom:env(safe-area-inset-bottom,0px);box-sizing:content-box;box-shadow:0 -5px 20px rgba(25,85,130,.06)}.mobile-bottom a{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;font-size:12px;line-height:1.35;color:var(--muted)}.mobile-bottom a.is-current{color:var(--blue);font-weight:700}.quick-icon{font-size:21px;height:25px;line-height:25px}.site-main{padding-bottom:85px}.back-top{bottom:78px}.article-grid{grid-template-columns:1fr}.article-aside{position:static}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-bottom{padding-bottom:24px}}
@media(max-width:680px){.container{width:calc(100% - 32px)}.hero{padding-top:24px}.hero h1{font-size:27px}.hero p{font-size:15px}.page-lead{padding-top:26px}.page-lead h1{font-size:25px}.section-heading h2{font-size:21px}.section-heading{align-items:start}.section-heading p{font-size:13px}.cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.feature-card{padding:15px;min-height:160px}.feature-card h3{font-size:16px}.feature-card p{font-size:13px}.split,.split.reverse,.two-cols{grid-template-columns:1fr}.split>.surface{padding:20px}.gallery-preview{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.news-grid{grid-template-columns:1fr}.mobile-feature{gap:16px;align-items:flex-start;padding:17px}.mobile-feature .media-device{flex:0 0 105px}.mobile-feature h3{font-size:19px}.mobile-feature p{font-size:14px}.article-body{padding:20px 18px}.reading-section h2{font-size:20px}.reading-section p{font-size:15.5px}.gallery-full{grid-template-columns:1fr}.footer-grid{gap:22px}.footer-bottom{display:block}.footer-bottom p{text-align:left;margin-top:8px}}
@media(max-width:350px){.brand-image{max-width:83px}.brand-image img{max-width:83px}.brand-fallback b{font-size:16px}.brand-fallback small{font-size:7px}.signup{min-width:59px;padding:0 11px}.header-inner{gap:4px}.cards{grid-template-columns:1fr}.feature-card{min-height:auto}.mobile-feature .media-device{flex-basis:82px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}