/* 第二版：沉浸式航空首屏与统一内容视觉。 */
:root{--muted:#687987;--line:#e5ebf0;--cloud:#f4f7fa}
body{background:#fff}
.wrap{max-width:1320px;width:calc(100% - 112px)}
.site-header{backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:background .25s,border-color .25s}
.header-inner{height:88px}
.brand img{width:143px}
.brand>span{font-size:12px;color:#556a7e}
.header-inner nav{gap:38px;font-size:15px;margin-right:32px}
.header-inner nav>a.active:after{bottom:15px;width:24px;left:calc(50% - 12px)}
.button{padding:13px 27px;min-height:52px;font-size:14px;font-weight:500}
.button.small{min-height:44px;font-size:13px;padding-inline:21px}
.home-page .site-header{background:rgba(255,255,255,.44);border-bottom-color:rgba(255,255,255,.48)}
.home-page .site-header.scrolled{background:rgba(255,255,255,.95);border-bottom-color:var(--line)}
.hero-immersive{position:relative;isolation:isolate;height:718px;margin-top:-88px;background:#e8f4ff;overflow:hidden}
.hero-visual{position:absolute;inset:0;z-index:-1}
.hero-visual>img{height:100%;width:100%;object-fit:cover;object-position:center 54%;display:block}
.hero-content{height:100%;position:relative;display:flex;align-items:center;padding-top:42px;padding-bottom:45px}
.hero-copy{max-width:680px;position:relative}
.hero-copy .eyebrow{font-size:12px;letter-spacing:2px;color:#3e658a;gap:9px;margin-bottom:22px}
.hero-copy .blue-dot{width:5px;height:5px}
.hero-copy h1{font-size:clamp(32px,3.2vw,48px);line-height:1.57;font-weight:650;margin:0 0 24px;color:#132f48;white-space:nowrap}
.hero-copy .hero-brand{font-size:1.12em;line-height:1.15;font-weight:750;margin-bottom:16px}
.hero-copy h1 .blue{color:#005fd5}
.hero-copy>p{font-size:15px;line-height:1.95;color:#50697e;margin:0 0 30px}
.hero-actions{gap:15px}
.hero-actions .button{gap:28px;min-height:52px;box-shadow:0 6px 17px #0064e014}
.hero-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:52px;gap:22px;padding:12px 24px;border:1px solid #7798b470;border-radius:100px;font-size:14px;color:#1b466c;background:#ffffff45;backdrop-filter:blur(10px);transition:background .2s}
.hero-secondary:hover{background:#ffffffb0}
.hero-caption{position:absolute;bottom:105px;right:3px;display:flex;flex-direction:column;align-items:flex-end;gap:7px;color:#355370;text-shadow:0 1px 14px #fff}
.hero-caption>span{font-size:15px;font-weight:500;letter-spacing:1px}
.hero-caption>small{font-size:8px;letter-spacing:2.4px}
.hero-scroll{display:flex;gap:14px;align-items:center;position:absolute;left:0;bottom:94px;font-size:10px;color:#617b91}
.hero-scroll>.icon{transform:rotate(90deg);width:15px;height:15px}
.service-dock{position:relative;z-index:2;margin-top:-54px;min-height:116px;padding:27px 15px;background:rgba(255,255,255,.97);border:1px solid #e6edf3;border-radius:25px;box-shadow:0 15px 35px #1a41690a}
.service-dock>a{padding:0 24px!important;gap:17px;transition:transform .2s}
.service-dock>a:hover{transform:translateY(-2px)}
.service-dock .service-icon{width:47px;height:47px;border-radius:15px;background:#f2f7fd;border:0}
.service-dock .service-icon>.icon{width:24px;height:24px}
.service-dock strong{font-size:16px;font-weight:600}
.service-dock small{font-size:11px;margin-top:4px;color:#82909c}
.service-dock .service-arrow{width:17px;height:17px;color:#8d9ba8}
.articles-section{padding-top:78px;padding-bottom:68px}
.section-heading{margin-bottom:30px}
.section-heading .eyebrow{color:#7d93a6;font-size:10px;letter-spacing:2px;margin-bottom:12px}
.section-heading h2{font-size:35px;font-weight:650;gap:25px;line-height:1.3}
.section-heading h2>span{font-size:14px;color:#8b98a3;padding-top:7px}
.demo-label{font-size:10px;color:#94a1ac}
.article-toolbar{margin-bottom:32px}
.category-tabs{gap:6px}
.category-tabs a{font-size:13px;padding:10px 20px;color:#6f8090}
.category-tabs a.selected{background:#eef5ff;color:var(--blue);font-weight:600}
.search-form{width:283px;min-height:43px;background:#f4f7f9;padding-left:17px}
.search-form input{font-size:12px}
.article-grid{gap:28px;align-items:stretch}
.article-card{border:1px solid #e5ebf0;border-radius:22px;overflow:hidden;background:#fff;transition:transform .25s,box-shadow .25s,border-color .25s;display:flex;flex-direction:column}
@media(hover:hover){.article-card:hover{transform:translateY(-5px);box-shadow:0 15px 32px #1c40670b;border-color:#d4e1ec}}
.article-image{aspect-ratio:1.82;border-radius:0;flex:none}
.article-card .article-image>img{object-position:center 50%}
.article-card:first-child .article-image>img{object-position:center 49%}
.article-card-body{padding:22px 24px 23px;display:flex;flex-direction:column;flex:1}
.article-meta{font-size:11px;gap:10px;margin-bottom:15px}
.article-meta>span:first-child{font-weight:500}
.article-card h3{font-size:20px;line-height:1.65;min-height:66px;margin-bottom:12px;font-weight:600}
.article-card h3 a{display:block}
.article-card p{font-size:13px;line-height:1.95;color:#7a8995;min-height:51px;margin-bottom:21px}
.read-link{font-size:12px;justify-content:space-between;width:100%;padding-top:15px;border-top:1px solid #edf0f4;color:#657d91;margin-top:auto}
.read-link>.icon{width:17px;height:17px;color:var(--blue)}
.image-label{top:17px;left:18px;background:#fffffff2;color:#2a4d6b;border:1px solid #ffffffa0;backdrop-filter:blur(12px);font-size:10px;padding:5px 11px}
.pagination{border:0;margin-top:34px;padding-top:10px}
.pagination>span{font-size:11px}
.pagination a{font-size:12px;width:39px;height:39px}
.download-banner{background:#0064e0;color:#fff;border-radius:25px;padding:38px 44px;margin-bottom:78px;gap:24px}
.download-mark{padding:7px;background:#ffffff1f;border:1px solid #ffffff32;border-radius:20px}
.download-mark img{width:55px;height:55px}
.download-banner h2{font-size:27px;font-weight:600;margin-bottom:7px}
.download-banner p{font-size:13px;color:#d6e6fc}
.download-banner>.button{background:white;color:var(--blue);border-color:white;font-size:13px;padding:12px 25px;min-height:48px}
.download-banner>.button:hover{background:#edf5ff}
.site-footer{padding-top:57px;background:#f6f8fa}
.footer-main{padding-bottom:38px;gap:62px}
.footer-brand>img{width:138px}
.footer-brand>p{font-size:13px;margin-top:18px}
.footer-brand>span{font-size:11px}
.footer-main h2{font-size:13px;margin-bottom:22px}
.footer-main>div:not(:first-child)>a{font-size:12px;margin-bottom:13px}
.friend-links{padding-block:23px;font-size:11px}
.footer-bottom{font-size:10px;padding-block:23px 5px}
.category-hero{padding-block:42px 48px}
.category-hero h1{font-size:41px;font-weight:600}
.article-main h1{font-size:38px;line-height:1.6}
.article-layout{grid-template-columns:minmax(0,790px) 245px;gap:65px}
.article-deck{font-size:16px;line-height:1.9}
.article-cover{border-radius:22px}
.article-content{font-size:16px;line-height:2.1}
.article-content h2{font-size:24px;margin-block:39px 18px}
.article-tag{font-size:12px}
.byline{font-size:11px;gap:14px}
.answer-box{padding:25px 28px;border-left-width:3px;border-radius:0 16px 16px 0}
.answer-box p{font-size:15px}
.article-sidebar{top:125px}
.toc nav>a{font-size:12px;padding-block:13px}
.sidebar-app{border-radius:22px}
.reading-progress{top:88px}
.related-grid .article-card h3{font-size:18px}
@media(min-width:1650px){.hero-immersive{height:770px}.hero-copy h1{font-size:51px}.hero-copy>p{font-size:16px}.hero-content{padding-top:20px}.hero-caption{bottom:115px}.hero-scroll{bottom:104px}}
@media(max-width:1150px){.wrap{width:calc(100% - 72px)}.header-inner nav{gap:28px;font-size:14px;margin-right:12px}.brand img{width:133px}.hero-immersive{height:665px}.hero-copy h1{font-size:36px}.hero-copy{max-width:570px}.hero-copy>p{font-size:14px}.hero-caption{bottom:103px}.hero-content{padding-top:30px}.service-dock{padding:25px 10px;min-height:109px}.service-dock>a{padding:0 18px!important;gap:12px}.service-dock strong{font-size:14px}.service-dock small{font-size:9px}.service-dock .service-icon{width:41px;height:41px;border-radius:13px}.section-heading h2{font-size:31px}.section-heading h2>span{font-size:12px}.article-grid{gap:22px}.article-card-body{padding:19px 20px 21px}.article-card h3{font-size:18px;min-height:60px}.article-card p{font-size:12px}.article-layout{grid-template-columns:minmax(0,1fr) 220px;gap:40px}.article-main h1{font-size:33px}.footer-main{gap:30px}.footer-bottom{font-size:9px}}
@media(max-width:800px){.wrap{width:calc(100% - 48px)}.header-inner{height:74px}.header-inner nav{gap:22px;margin:0;font-size:12px}.brand img{width:120px}.home-page .site-header{background:#ffffff55}.hero-immersive{margin-top:-74px;height:625px}.hero-visual>img{object-position:58% 50%}.hero-copy{max-width:450px}.hero-copy h1{font-size:29px}.hero-copy .hero-brand{font-size:1.2em}.hero-copy .eyebrow{font-size:10px;margin-bottom:18px}.hero-copy>p{font-size:12px}.hero-actions .button,.hero-secondary{font-size:12px;padding:11px 20px;min-height:47px;gap:15px}.hero-caption{font-size:12px;bottom:98px}.hero-caption>span{font-size:12px}.hero-caption>small{font-size:7px}.hero-scroll{font-size:9px}.service-dock{padding:22px 6px;min-height:99px;border-radius:20px;margin-top:-43px}.service-dock>a{padding:0 11px!important;gap:10px}.service-dock .service-icon{width:34px;height:34px;border-radius:11px}.service-dock .service-icon>.icon{width:20px;height:20px}.service-dock strong{font-size:12px}.service-dock small{display:none}.articles-section{padding-top:55px;padding-bottom:45px}.section-heading h2{font-size:29px}.section-heading h2>span{max-width:none;font-size:11px}.article-grid{grid-template-columns:1fr 1fr;gap:25px 22px}.article-card h3{font-size:18px;min-height:60px}.article-card p{min-height:47px;font-size:12px}.article-meta{font-size:10px}.article-toolbar .search-form{min-height:42px}.download-banner{padding:28px 30px;margin-bottom:52px}.download-banner h2{font-size:22px}.download-banner p{font-size:11px}.download-mark img{width:45px;height:45px}.download-mark{border-radius:16px;padding:6px}.download-banner>.button{font-size:11px;padding:10px 17px;min-height:43px}.footer-main{gap:27px}.footer-main>div:last-child>a{font-size:11px}.footer-brand>p{font-size:12px}.footer-main>div:last-child h2{margin-bottom:5px}.friend-links{font-size:10px}.article-layout{grid-template-columns:1fr}.article-main h1{font-size:33px}.reading-progress{top:74px}.article-sidebar{display:none}.category-hero h1{font-size:33px}.category-hero{padding-block:30px 40px}}
@media(max-width:560px){.wrap{width:calc(100% - 40px)}.header-inner{height:68px}.brand img{width:116px}.header-inner nav{top:68px;font-size:14px}.home-page .site-header{background:#ffffff38;border-bottom:1px solid #ffffff54;backdrop-filter:blur(16px)}.home-page .site-header.scrolled{background:#fffffff2}.menu-toggle{background:#ffffff7a;border:1px solid #ffffffb0}.hero-immersive{margin-top:-68px;height:780px;background:#d7edff}.hero-visual>img{object-position:50% 50%;object-fit:cover}.hero-content{padding-top:109px;padding-bottom:0;align-items:flex-start}.hero-copy{max-width:100%;width:100%}.hero-copy .eyebrow{font-size:10px;margin-bottom:16px;letter-spacing:1.5px;color:#355d80}.hero-copy h1{font-size:clamp(24px,7.2vw,36px);line-height:1.7;white-space:normal;margin-bottom:15px}.hero-copy .hero-brand{font-size:1.15em;margin-bottom:10px;line-height:1.25}.hero-copy>p{font-size:12px;line-height:1.9;margin-bottom:22px;color:#466985}.hero-actions{gap:11px;flex-wrap:wrap}.hero-actions .button,.hero-secondary{font-size:11px;min-height:44px;padding:10px 18px;gap:14px}.hero-actions .icon{width:16px;height:16px}.hero-caption{bottom:82px;left:0;right:auto;align-items:flex-start;color:#52718c;gap:3px}.hero-caption>span{font-size:11px}.hero-caption>small{font-size:6px;letter-spacing:1.5px}.hero-scroll{display:none}.service-dock{margin-top:-40px;padding:6px 15px;min-height:0;border-radius:20px;grid-template-columns:1fr 1fr;background:#fffffffa}.service-dock>a{min-height:86px;padding:17px 12px!important;gap:10px}.service-dock>a:nth-child(odd){padding-left:0!important}.service-dock>a:nth-child(even){padding-left:17px!important;padding-right:0!important}.service-dock strong{font-size:12px}.service-dock small{font-size:8px;display:block;line-height:1.7;margin-top:3px}.service-dock .service-icon{width:35px;height:35px;border-radius:11px}.service-dock .service-arrow{display:none}.articles-section{padding-top:44px;padding-bottom:37px}.section-heading{gap:14px;margin-bottom:23px}.section-heading .eyebrow{font-size:8px;letter-spacing:1.8px;margin-bottom:10px}.section-heading h2{font-size:30px;display:block}.section-heading h2>span{font-size:11px;padding:0;margin-top:9px;max-width:none}.demo-label{font-size:9px}.category-tabs{gap:3px}.category-tabs a{font-size:11px;padding:8px 11px}.article-toolbar{margin-bottom:24px;gap:16px}.article-toolbar .search-form{min-height:43px}.search-form input{font-size:12px}.article-grid{grid-template-columns:1fr;gap:24px}.article-card{border-radius:20px}.article-image{aspect-ratio:1.77;border-radius:0}.article-card-body{padding:19px 21px 21px}.article-card h3{font-size:19px;min-height:0;line-height:1.7;margin-bottom:12px}.article-card p{font-size:13px;line-height:1.9;min-height:0;margin-bottom:20px}.article-meta{font-size:10px;margin-bottom:12px}.read-link{font-size:11px;padding-top:14px}.image-label{font-size:9px;padding:5px 10px;left:15px;top:15px}.pagination{margin-top:25px;padding-top:3px}.pagination>span{font-size:10px}.download-banner{padding:26px;grid-template-columns:46px 1fr;gap:19px;border-radius:21px;margin-bottom:43px}.download-mark{padding:0;background:transparent;border:0}.download-mark img{width:46px;height:46px}.download-banner h2{font-size:18px;margin-bottom:6px}.download-banner p{font-size:10px;color:#d4e5ff;line-height:1.9}.download-banner>.button{font-size:12px;min-height:45px;margin-top:3px;grid-column:1/-1}.site-footer{padding-top:37px}.footer-main{gap:29px 20px;padding-bottom:29px}.footer-brand>img{width:121px}.footer-brand>p{font-size:10px;margin-top:11px}.footer-brand>span{font-size:9px}.footer-main h2{font-size:12px;margin-bottom:17px}.footer-main>div:not(:first-child)>a{font-size:11px;margin-bottom:12px}.footer-main>div:last-child>a{font-size:10px;margin-bottom:0}.footer-qr{gap:8px}.footer-qr img{width:56px;height:56px}.friend-links{font-size:9px;padding-block:19px}.footer-bottom{font-size:8px;padding-top:18px}.article-main h1{font-size:28px;line-height:1.6}.article-deck{font-size:13px}.byline{gap:9px;font-size:9px}.article-content{font-size:15px;line-height:2.05}.article-content h2{font-size:22px;margin-top:31px}.article-cover{border-radius:16px}.answer-box{padding:20px 22px;border-radius:0 13px 13px 0}.answer-box p{font-size:13px}.article-tag{font-size:11px}.reading-progress{top:68px}.related-grid .article-card h3{font-size:18px}.category-hero h1{font-size:28px;line-height:1.6}.category-hero{padding-block:24px 35px}.related-section .section-heading h2{font-size:21px}}
@media(max-width:360px){.hero-immersive{height:760px}.hero-content{padding-top:104px}.hero-copy h1{font-size:24px}.hero-actions .button,.hero-secondary{padding-inline:14px;font-size:10px;gap:12px}.service-dock{padding-inline:12px}.service-dock>a{gap:8px}.service-dock strong{font-size:11px}.service-dock small{font-size:7px}.category-tabs a{font-size:10px;padding-inline:9px}.article-card h3{font-size:18px}}
@media(prefers-reduced-motion:no-preference){.hero-copy{animation:hero-rise .65s ease-out both}.service-dock{animation:hero-rise .65s .1s ease-out both}@keyframes hero-rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}}
@media print{.hero-immersive{height:450px;margin:0}.hero-visual{opacity:.3}.hero-caption,.hero-scroll,.service-dock{display:none}.article-card{break-inside:avoid;box-shadow:none}.article-layout{display:block}}