/* roulang page: index */
:root{--blue:#1c5da8;--blue-deep:#15395e;--blue-soft:#eaf2fb;--cyan:#16a6a1;--rose:#d96b77;--ink:#172b43;--muted:#62758b;--line:#dce5ee;--paper:#fff;--page:#f5f8fc;--shadow:0 12px 32px rgba(31,62,96,.08);--shadow-hover:0 18px 38px rgba(31,62,96,.14);--r:10px;--container:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{margin:0;background:var(--page);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","Noto Sans CJK SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75}
a{color:inherit;text-decoration:none}
a:hover{color:var(--blue)}
img{display:block;width:100%;height:auto}
button{font:inherit}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid rgba(22,166,161,.55);outline-offset:3px}
.container{width:min(calc(100% - 44px),var(--container));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 3px 14px rgba(31,62,96,.035)}
.nav-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;min-width:0;color:var(--ink)}
.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:9px;background:var(--blue);color:#fff;font-weight:800;font-size:19px;flex:0 0 auto}
.brand-name{font-weight:750;font-size:16px;line-height:1.25;max-width:250px}
.primary-nav{display:flex;align-items:center;gap:7px}
.primary-nav a{padding:9px 12px;border-radius:7px;color:#52657a;font-size:14px;font-weight:600;transition:background .18s,color .18s}
.primary-nav a:hover,.primary-nav a[aria-current="page"]{background:var(--blue-soft);color:var(--blue)}
.menu-toggle{display:none;border:1px solid var(--line);background:white;color:var(--ink);border-radius:7px;width:42px;height:42px;cursor:pointer}
.hero{padding:40px 0 32px}
.hero-panel{overflow:hidden;display:grid;grid-template-columns:minmax(0,1.18fr) minmax(300px,.82fr);min-height:372px;border-radius:12px;background:var(--blue-deep);color:#fff;box-shadow:var(--shadow)}
.hero-copy{padding:42px 48px;align-self:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:#a9dcdf;font-size:12px;font-weight:700;letter-spacing:0}
.eyebrow:before{content:"";width:20px;height:2px;background:var(--cyan)}
.hero h1{margin:12px 0 8px;color:#fff;font-size:36px;line-height:1.25;font-weight:800}
.hero h1 span{color:#86d7d3}
.hero-subtitle{margin:0 0 12px;color:#d7e5f3;font-size:17px;font-weight:600}
.hero-intro{max-width:640px;margin:0;color:#c3d1df;font-size:14px;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:11px;margin-top:22px}
.button-link{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 17px;border:1px solid transparent;border-radius:7px;background:var(--blue);color:#fff;font-weight:700;font-size:14px;transition:transform .18s,background .18s,box-shadow .18s}
.button-link:hover{background:#174d8a;color:#fff;transform:translateY(-1px);box-shadow:0 7px 18px rgba(20,77,138,.2)}
.button-link.secondary{background:transparent;border-color:rgba(255,255,255,.35);color:#fff}
.button-link.secondary:hover{background:rgba(255,255,255,.1)}
.hero .button-link{background:var(--cyan)}
.hero .button-link:hover{background:#118d8a}
.hero-board{align-self:stretch;padding:28px 28px 26px;background:#102f4e;border-left:1px solid rgba(255,255,255,.11)}
.board-head{display:flex;justify-content:space-between;align-items:center;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.16);font-size:13px;font-weight:700}
.live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:#48c7ae;margin-right:7px}
.board-list{list-style:none;margin:8px 0 0;padding:0}
.board-list li{display:grid;grid-template-columns:28px 1fr auto;align-items:center;gap:9px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.1);font-size:13px}
.board-index{color:#79d4d0;font-weight:800}
.board-title{color:#e6eff7;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.board-tag{color:#a8bed2;font-size:11px}
.board-note{margin:14px 0 0;color:#9bb1c5;font-size:12px}
.section{padding:56px 0}
.section.compact{padding:42px 0}
.section.white{background:#fff}
.section.tint{background:#edf4fa}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-heading h2{margin:0;color:var(--ink);font-size:25px;line-height:1.35;font-weight:780}
.section-heading p{max-width:650px;margin:7px 0 0;color:var(--muted);font-size:14px}
.section-kicker{display:block;margin-bottom:5px;color:var(--blue);font-size:12px;font-weight:750}
.text-link{color:var(--blue);font-size:13px;font-weight:700;white-space:nowrap}
.text-link:hover{text-decoration:underline}
.search-panel{display:grid;grid-template-columns:1.3fr 1fr 1fr auto;gap:12px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.field{display:flex;flex-direction:column;gap:6px}
.field label{color:#52657a;font-size:12px;font-weight:700}
.field input,.field select{height:43px;margin:0;border:1px solid #cfdae6;border-radius:6px;background:#fff;color:var(--ink);box-shadow:none;font-size:14px}
.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(28,93,168,.12)}
.search-panel .button-link{align-self:end;height:43px}
.filter-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}
.chip{display:inline-flex;padding:5px 11px;border:1px solid #dbe5ef;border-radius:5px;background:#f8fbfe;color:#536a80;font-size:12px;font-weight:650}
.entry-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}
.entry-photo{position:relative;min-height:280px;overflow:hidden;border-radius:10px;box-shadow:var(--shadow)}
.entry-photo img{position:absolute;inset:0;height:100%;object-fit:cover;object-position:center 36%}
.entry-copy h3{margin:0 0 11px;font-size:23px;line-height:1.4}
.entry-copy p{margin:0 0 14px;color:var(--muted)}
.entry-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:17px}
.tag{padding:5px 9px;border-radius:4px;background:var(--blue-soft);color:var(--blue);font-size:12px;font-weight:700}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;counter-reset:step}
.step{position:relative;padding:18px 16px 17px;border-top:2px solid var(--blue);background:#fff;box-shadow:var(--shadow)}
.step-no{display:block;color:var(--cyan);font-size:12px;font-weight:800}
.step h3{margin:7px 0 5px;font-size:16px}
.step p{margin:0;color:var(--muted);font-size:13px}
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:9px;background:#fff;overflow:hidden}
.stat{padding:22px 20px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat strong{display:block;color:var(--blue);font-size:18px}
.stat span{display:block;color:var(--muted);font-size:13px}
.latest-tools{display:flex;align-items:center;gap:8px}
.latest-tools span{color:var(--muted);font-size:12px}
.latest-tools a{padding:6px 10px;border:1px solid var(--line);border-radius:5px;color:#536a80;font-size:12px}
.latest-tools a:hover,.latest-tools a.active{border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}
.latest-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.media-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 5px 18px rgba(31,62,96,.055);transition:transform .18s,box-shadow .18s}
.media-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.media-image{position:relative;aspect-ratio:4/3;overflow:hidden;background:#dce5ee}
.media-image img{width:100%;height:100%;object-fit:cover;object-position:center 36%;transition:transform .3s}
.media-card:hover .media-image img{transform:scale(1.035)}
.media-badge{position:absolute;top:10px;left:10px;padding:4px 7px;border-radius:4px;background:rgba(21,57,94,.9);color:#fff;font-size:11px;font-weight:750}
.media-info{padding:12px 13px 13px}
.media-title{margin:0;color:var(--ink);font-size:14px;font-weight:750;line-height:1.5}
.media-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:8px;color:var(--muted);font-size:11px}
.media-score{color:#bf6a36;font-weight:750}
.popular-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px}
.popular-feature{position:relative;min-height:390px;overflow:hidden;border-radius:9px;background:#dce5ee}
.popular-feature img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 30%}
.popular-feature:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(13,35,58,.88))}
.feature-caption{position:absolute;z-index:1;left:24px;right:24px;bottom:22px;color:#fff}
.feature-caption span{display:inline-block;margin-bottom:8px;padding:4px 8px;border-radius:4px;background:var(--cyan);font-size:11px;font-weight:750}
.feature-caption h3{margin:0;font-size:23px}
.feature-caption p{margin:5px 0 0;color:#d9e4ee;font-size:13px}
.popular-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.popular-item{display:grid;grid-template-columns:78px 1fr;gap:11px;align-items:center;padding:9px;background:#fff;border:1px solid var(--line);border-radius:7px}
.popular-item img{width:78px;height:78px;object-fit:cover;border-radius:5px}
.popular-item h3{margin:0 0 4px;font-size:13px;line-height:1.45}
.popular-item span{color:var(--blue);font-size:11px;font-weight:700}
.quote-band{display:grid;grid-template-columns:.8fr 1.2fr;gap:36px;align-items:center;padding:28px 32px;background:#e8f2f7;border-left:4px solid var(--cyan);border-radius:4px}
.quote-band h2{margin:0;font-size:22px}
.quote-band p{margin:0;color:#52677c;font-size:14px}
.preference-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.preference{padding:16px;background:#fff;border:1px solid var(--line);border-radius:7px}
.preference strong{display:block;margin-bottom:5px;color:var(--blue);font-size:14px}
.preference span{color:var(--muted);font-size:12px}
.category-layout{display:grid;grid-template-columns:.68fr 1.32fr;gap:30px}
.category-aside{padding:20px 22px;background:var(--blue-deep);color:white;border-radius:8px}
.category-aside h3{margin:0 0 9px;color:white;font-size:19px}
.category-aside p{margin:0;color:#d1deea;font-size:13px}
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.category-item{padding:16px 17px;border:1px solid var(--line);background:#fff;border-radius:7px;transition:border-color .18s,box-shadow .18s}
.category-item:hover{border-color:#a9c3dd;box-shadow:var(--shadow)}
.category-item h3{margin:0 0 5px;font-size:15px}
.category-item p{margin:0;color:var(--muted);font-size:12px;line-height:1.7}
.topic-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.topic{position:relative;min-height:190px;overflow:hidden;border-radius:8px;background:#233f5a;color:white}
.topic img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.72;transition:transform .25s}
.topic:hover img{transform:scale(1.04)}
.topic:after{content:"";position:absolute;inset:25% 0 0;background:linear-gradient(transparent,rgba(13,35,58,.9))}
.topic-copy{position:absolute;z-index:1;left:17px;right:17px;bottom:15px}
.topic-copy h3{margin:0 0 4px;color:#fff;font-size:16px}
.topic-copy p{margin:0;color:#e1e9f0;font-size:12px}
.rank-columns{columns:2;column-gap:30px}
.rank-item{display:grid;grid-template-columns:34px minmax(0,1fr) auto;align-items:center;gap:11px;break-inside:avoid;padding:12px 0;border-bottom:1px solid var(--line)}
.rank-num{color:#7c93a8;font-size:15px;font-weight:800}
.rank-item:nth-child(-n+3) .rank-num{color:var(--rose)}
.rank-name{min-width:0}
.rank-name strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}
.rank-name span{color:var(--muted);font-size:11px}
.rank-data{text-align:right;color:var(--muted);font-size:11px}
.rank-data b{display:block;color:var(--blue);font-size:12px}
.news-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:28px}
.news-lead{display:grid;grid-template-columns:42% 1fr;gap:18px;align-items:center;padding-bottom:17px;border-bottom:1px solid var(--line)}
.news-lead img{height:180px;object-fit:cover;border-radius:7px}
.news-lead h3{margin:0 0 7px;font-size:17px}
.news-lead p{margin:0 0 8px;color:var(--muted);font-size:13px}
.news-date{color:#8292a3;font-size:11px}
.news-list{list-style:none;margin:0;padding:0}
.news-list li{display:grid;grid-template-columns:76px 1fr;gap:12px;padding:11px 0;border-bottom:1px solid var(--line)}
.news-list img{width:76px;height:62px;object-fit:cover;border-radius:5px}
.news-list h3{margin:1px 0 3px;font-size:13px;line-height:1.5}
.news-list span{color:#8292a3;font-size:11px}
.index-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;padding:25px 28px;background:#fff;border:1px solid var(--line);border-radius:8px}
.index-panel h2{margin:0 0 8px;font-size:21px}
.index-panel p{margin:0;color:var(--muted);font-size:13px}
.index-tags{display:flex;flex-wrap:wrap;gap:8px}
.index-tags span{padding:7px 10px;border:1px solid #dbe5ef;border-radius:5px;background:#f8fbfe;color:#52677c;font-size:12px}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.faq-list details{padding:15px 17px;background:#fff;border:1px solid var(--line);border-radius:7px}
.faq-list summary{position:relative;padding-right:25px;cursor:pointer;list-style:none;color:var(--ink);font-size:14px;font-weight:720}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"＋";position:absolute;right:0;top:0;color:var(--blue);font-size:18px;line-height:1}
.faq-list details[open] summary:after{content:"−"}
.faq-list details p{margin:10px 0 0;color:var(--muted);font-size:13px}
.final-cta{padding:37px 40px;background:#15395e;color:#fff;border-radius:9px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.final-cta h2{margin:0 0 5px;color:#fff;font-size:23px}
.final-cta p{margin:0;color:#c9d7e4;font-size:13px}
.site-footer{padding:40px 0 18px;background:#102f4e;color:#cad7e4}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:28px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#fff;font-weight:750}
.footer-brand .brand-mark{width:36px;height:36px;background:var(--cyan);font-size:16px}
.footer-intro{max-width:310px;margin:0;color:#afc0d0;font-size:12px}
.footer-col h3{margin:0 0 10px;color:#fff;font-size:13px}
.footer-col a{display:block;width:max-content;max-width:100%;margin:5px 0;color:#bdcbd8;font-size:12px}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;padding-top:15px;border-top:1px solid rgba(255,255,255,.14);color:#9fb2c4;font-size:11px}
@media(max-width:1024px){
 .hero-copy{padding:34px}.hero-board{padding:24px}
 .latest-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
 .popular-layout{grid-template-columns:.9fr 1.1fr}
 .popular-list{grid-template-columns:1fr}
 .preference-grid{grid-template-columns:repeat(3,1fr)}
 .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
}
@media(max-width:768px){
 .container{width:min(calc(100% - 32px),var(--container))}
 .nav-shell{min-height:66px}
 .brand-name{font-size:14px;max-width:220px}
 .menu-toggle{display:grid;place-items:center}
 .menu-toggle span{font-size:21px;line-height:1}
 .primary-nav{display:none;position:absolute;top:65px;left:16px;right:16px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow)}
 .primary-nav.is-open{display:grid;grid-template-columns:1fr 1fr}
 .primary-nav a{padding:10px}
 .hero{padding:24px 0}
 .hero-panel{grid-template-columns:1fr}
 .hero-copy{padding:30px}
 .hero h1{font-size:31px}
 .hero-board{border-left:0;border-top:1px solid rgba(255,255,255,.11)}
 .section{padding:43px 0}
 .section-heading{align-items:flex-start;flex-direction:column;gap:10px}
 .search-panel{grid-template-columns:1fr 1fr}
 .search-panel .button-link{width:100%}
 .entry-grid,.category-layout,.news-grid,.index-panel{grid-template-columns:1fr}
 .entry-photo{min-height:250px}
 .steps{grid-template-columns:repeat(2,1fr)}
 .stat-row{grid-template-columns:repeat(2,1fr)}
 .stat:nth-child(2){border-right:0}
 .stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
 .latest-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
 .popular-layout{grid-template-columns:1fr}
 .popular-feature{min-height:320px}
 .popular-list{grid-template-columns:repeat(2,1fr)}
 .quote-band{grid-template-columns:1fr;gap:10px}
 .topic-strip{grid-template-columns:1fr 1fr}
 .news-lead{grid-template-columns:38% 1fr}
 .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
 body{font-size:14px}
 .container{width:calc(100% - 28px)}
 .brand-mark{width:37px;height:37px}
 .brand-name{max-width:205px;font-size:13px}
 .primary-nav{left:14px;right:14px}
 .hero-copy{padding:25px 21px}
 .hero h1{font-size:28px}
 .hero-subtitle{font-size:15px}
 .hero-intro{font-size:13px}
 .hero-board{padding:20px}
 .section-heading h2{font-size:22px}
 .search-panel{grid-template-columns:1fr;padding:14px}
 .filter-chips{gap:6px}
 .steps{grid-template-columns:1fr 1fr;gap:9px}
 .step{padding:14px 12px}
 .step h3{font-size:14px}
 .stat{padding:17px 14px}
 .stat strong{font-size:16px}
 .latest-grid{gap:10px}
 .media-info{padding:10px}
 .media-title{font-size:13px}
 .media-meta{font-size:10px}
 .latest-tools{flex-wrap:wrap}
 .popular-feature{min-height:260px}
 .popular-list{grid-template-columns:1fr}
 .preference-grid{grid-template-columns:1fr 1fr}
 .category-grid{grid-template-columns:1fr}
 .topic-strip{grid-template-columns:1fr}
 .topic{min-height:170px}
 .rank-columns{columns:1}
 .news-lead{grid-template-columns:1fr}
 .news-lead img{height:190px}
 .faq-list{grid-template-columns:1fr}
 .final-cta{align-items:flex-start;flex-direction:column;padding:25px 22px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:22px 14px}
 .footer-grid>div:first-child{grid-column:1/-1}
 .footer-bottom{flex-direction:column;gap:4px}
}