/* roulang page: index */
:root{--ink:#172b3b;--muted:#687b8a;--blue:#1f6eaa;--blue-dark:#174e79;--cyan:#dff4f4;--coral:#e96758;--paper:#fff;--mist:#f4f8fc;--line:#dce7ee;--shadow:0 14px 36px rgba(33,70,98,.09);--radius:12px;--container:1200px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--mist);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}
a{color:inherit;text-decoration:none}
img{display:block;width:100%;object-fit:cover}
button{font:inherit}
.container{width:min(var(--container),calc(100% - 48px));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.navbar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:16px;white-space:nowrap}
.brand-mark{width:38px;height:38px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:10px;font-size:18px}
.nav-links{display:flex;align-items:center;gap:27px;margin:0;padding:0;list-style:none}
.nav-links a{color:#516574;font-size:14px;transition:color .2s}
.nav-links a:hover,.nav-links a:focus-visible,.nav-links a.active{color:var(--blue)}
.nav-search{border:1px solid var(--line);background:#f8fbfd;border-radius:8px;padding:9px 13px;color:var(--muted);font-size:13px}
.hero{position:relative;min-height:470px;display:flex;align-items:center;overflow:hidden;color:#fff;background:#163e5b url("<?= imageUrl('photo-1556911220-e15b29be8c8f', 1800) ?>") center 48%/cover}
.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,39,61,.87),rgba(18,55,77,.65) 52%,rgba(12,38,57,.18))}
.hero-inner{position:relative;padding:72px 0 76px;max-width:760px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 11px;border:1px solid rgba(255,255,255,.4);border-radius:99px;background:rgba(255,255,255,.1);font-size:12px}
.hero-kicker:before{content:"";width:7px;height:7px;border-radius:50%;background:#ffb092}
.hero h1{max-width:720px;margin:22px 0 12px;font-size:46px;line-height:1.18;font-weight:800}
.hero h1 em{font-style:normal;color:#a9e2e2}
.hero-subtitle{margin:0 0 14px;font-size:19px;font-weight:600}
.hero-copy{max-width:680px;margin:0;color:rgba(255,255,255,.85);font-size:15px}
.hero-actions{display:flex;gap:12px;margin-top:25px}
.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 19px;border:1px solid transparent;border-radius:8px;background:var(--coral);color:#fff;font-weight:700;transition:transform .2s,background .2s,box-shadow .2s}
.button:hover{transform:translateY(-2px);background:#d95648;box-shadow:0 8px 20px rgba(0,0,0,.15)}
.button:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid #8dd9df;outline-offset:3px}
.button.secondary{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.58)}
.button.secondary:hover{background:rgba(255,255,255,.23)}
.stamp{position:absolute;right:5%;top:67px;width:104px;height:104px;display:grid;place-items:center;text-align:center;border:2px solid rgba(255,255,255,.8);border-radius:50%;background:var(--coral);transform:rotate(9deg);font-size:13px;font-weight:800;line-height:1.45}
main{overflow:hidden}
.section{padding:66px 0}
.section.white{background:#fff}
.section.tinted{background:#edf5f8}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:27px}
.section-head h2{margin:0;font-size:27px;line-height:1.3}
.section-head p{max-width:640px;margin:8px 0 0;color:var(--muted)}
.section-link{color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.metric{padding:24px 28px;border-right:1px solid var(--line)}
.metric:last-child{border-right:0}
.metric strong{display:block;color:var(--blue-dark);font-size:28px;line-height:1.2}
.metric span{display:block;margin-top:7px;color:var(--muted);font-size:13px}
.problem-band{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center}
.problem-copy h2{margin:0 0 14px;font-size:28px}
.problem-copy p{margin:0;color:var(--muted)}
.problem-quote{padding:27px 30px;border-left:4px solid var(--coral);background:#fff;border-radius:0 var(--radius) var(--radius) 0;box-shadow:var(--shadow);font-size:18px;font-weight:650}
.problem-quote small{display:block;margin-top:12px;color:var(--muted);font-size:13px;font-weight:400}
.demo-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:46px;align-items:center}
.demo-image{height:350px;border-radius:var(--radius);box-shadow:var(--shadow)}
.demo-text h2{margin:0 0 12px;font-size:28px}
.demo-text>p{color:var(--muted)}
.steps{margin:20px 0 0;padding:0;list-style:none}
.steps li{display:flex;gap:14px;padding:12px 0;border-bottom:1px solid var(--line)}
.steps b{flex:0 0 28px;width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--cyan);color:var(--blue-dark);font-size:13px}
.steps span{color:#526878}
.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.poster{position:relative;height:225px;overflow:hidden;border-radius:10px;background:#dfeaf0}
.poster img{height:100%;transition:transform .35s}
.poster:hover img{transform:scale(1.045)}
.poster:after{content:"";position:absolute;inset:45% 0 0;background:linear-gradient(transparent,rgba(10,30,43,.65))}
.poster-label{position:absolute;z-index:1;left:14px;bottom:13px;color:#fff;font-weight:700}
.poster-label small{display:block;font-size:11px;font-weight:500;opacity:.86}
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pain-item{padding:23px 25px;border-right:1px solid var(--line)}
.pain-item:last-child{border:0}
.pain-item b{display:block;margin-bottom:7px;color:var(--blue-dark);font-size:16px}
.pain-item p{margin:0;color:var(--muted);font-size:14px}
.path{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.path-item{position:relative;padding:18px 25px 18px 0}
.path-item:not(:last-child):after{content:"";position:absolute;top:33px;right:14px;width:35px;height:1px;background:#a9c9d6}
.path-number{color:var(--coral);font-size:12px;font-weight:800}
.path-item h3{margin:7px 0;font-size:16px}
.path-item p{margin:0;color:var(--muted);font-size:13px}
.latest-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px 18px}
.film-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:transform .2s,box-shadow .2s}
.film-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.film-image{position:relative;height:180px;background:#dfeaf0}
.film-image img{height:100%}
.badge{position:absolute;top:11px;left:11px;padding:4px 8px;border-radius:5px;background:rgba(23,78,121,.92);color:#fff;font-size:11px;font-weight:700}
.film-info{padding:13px 14px 15px}
.film-info h3{margin:0;font-size:15px}
.film-meta{display:flex;align-items:center;justify-content:space-between;margin-top:8px;color:var(--muted);font-size:12px}
.rating{color:#c66a36;font-weight:800}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feature-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:10px;transition:box-shadow .2s,transform .2s}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.feature-card img{height:185px}
.feature-card div{padding:16px}
.feature-card h3{margin:0 0 7px;font-size:16px}
.feature-card p{margin:0;color:var(--muted);font-size:13px}
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 36px}
.channel{padding:19px 0;border-bottom:1px solid var(--line)}
.channel h3{margin:0 0 6px;color:var(--blue-dark);font-size:16px}
.channel p{margin:0;color:var(--muted);font-size:13px}
.rank-layout{display:grid;grid-template-columns:.7fr 1.3fr;gap:45px}
.rank-intro h2{margin:0 0 12px;font-size:28px}
.rank-intro p{margin:0;color:var(--muted)}
.rank-list{margin:0;padding:0;list-style:none}
.rank-list li{display:grid;grid-template-columns:38px 1fr auto auto;align-items:center;gap:13px;padding:10px 0;border-bottom:1px solid var(--line)}
.rank-num{color:#96a8b4;font-weight:800}
.rank-num.top{color:var(--coral)}
.rank-name{font-weight:650}
.rank-tag{padding:3px 8px;border-radius:4px;background:#e8f3f5;color:#467485;font-size:11px}
.rank-score{color:#b97136;font-size:12px;font-weight:700}
.quote-strip{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.quote-card{padding:25px 28px;background:#fff;border:1px solid var(--line);border-radius:10px}
.quote-card p{margin:0;color:#415867;font-size:15px}
.quote-card footer{margin-top:15px;color:var(--muted);font-size:12px}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article-card{display:grid;grid-template-columns:110px 1fr;gap:15px;align-items:center;padding:12px;background:#fff;border:1px solid var(--line);border-radius:9px;transition:box-shadow .2s}
.article-card:hover{box-shadow:var(--shadow)}
.article-card img{height:82px;border-radius:6px}
.article-card h3{margin:0 0 5px;font-size:14px;line-height:1.5}
.article-card time{color:var(--muted);font-size:11px}
.guarantees{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.guarantee{padding:17px 0;border-top:2px solid #9acbd2}
.guarantee b{display:block;margin-bottom:6px}
.guarantee p{margin:0;color:var(--muted);font-size:13px}
.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:0 35px}
.faq-item{padding:19px 0;border-bottom:1px solid var(--line)}
.faq-item h3{margin:0 0 7px;font-size:15px}
.faq-item p{margin:0;color:var(--muted);font-size:13px}
.final-band{padding:45px 0;background:#e7f3f6}
.final-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
.final-inner h2{margin:0 0 6px;font-size:25px}
.final-inner p{margin:0;color:var(--muted)}
.site-footer{padding:46px 0 20px;background:#172e40;color:#d6e2e9}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:30px}
.footer-brand{font-weight:800;font-size:17px}
.footer-about{max-width:330px;color:#aebfc9;font-size:13px}
.footer-col h3{margin:0 0 12px;color:#fff;font-size:14px}
.footer-col a{display:block;margin:7px 0;color:#aebfc9;font-size:13px}
.footer-col a:hover{color:#fff}
.copyright{padding-top:16px;border-top:1px solid rgba(255,255,255,.14);color:#9cafba;font-size:12px}
@media(max-width:1024px){.latest-grid,.preview-grid{grid-template-columns:repeat(3,1fr)}.article-grid{grid-template-columns:repeat(2,1fr)}.stamp{right:3%;top:35px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
@media(max-width:768px){.container{width:min(100% - 36px,var(--container))}.navbar{height:auto;min-height:68px;flex-wrap:wrap;gap:8px;padding:12px 0}.nav-links{order:3;width:100%;justify-content:space-between;gap:10px;overflow:auto;padding:4px 0}.nav-links a{white-space:nowrap;font-size:13px}.nav-search{margin-left:auto}.hero{min-height:440px}.hero-inner{padding:60px 0}.hero h1{font-size:37px}.stamp{width:82px;height:82px;right:18px;top:24px;font-size:11px}.section{padding:52px 0}.section-head{align-items:start}.metrics{grid-template-columns:repeat(2,1fr)}.metric:nth-child(2){border-right:0}.metric:nth-child(-n+2){border-bottom:1px solid var(--line)}.problem-band,.demo-layout,.rank-layout{grid-template-columns:1fr;gap:25px}.demo-image{height:280px}.preview-grid,.latest-grid{grid-template-columns:repeat(2,1fr)}.pain-grid{grid-template-columns:1fr}.pain-item{border-right:0;border-bottom:1px solid var(--line)}.pain-item:last-child{border-bottom:0}.path{grid-template-columns:repeat(2,1fr)}.path-item:not(:last-child):after{display:none}.channel-grid{grid-template-columns:repeat(2,1fr);gap:0 24px}.feature-grid{grid-template-columns:repeat(2,1fr)}.guarantees{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){body{font-size:14px}.container{width:calc(100% - 30px)}.brand{font-size:14px}.brand-mark{width:34px;height:34px}.nav-search{display:none}.nav-links{gap:19px;justify-content:flex-start}.hero{min-height:490px;background-position:58% center}.hero:before{background:rgba(11,39,61,.72)}.hero-inner{padding:58px 0 64px}.hero h1{font-size:32px;max-width:360px}.hero-subtitle{font-size:16px}.hero-copy{font-size:14px}.hero-actions{flex-wrap:wrap}.stamp{top:15px;right:12px;width:69px;height:69px;font-size:10px}.section{padding:43px 0}.section-head{display:block}.section-head h2{font-size:23px}.section-link{display:inline-block;margin-top:10px}.metric{padding:18px}.metric strong{font-size:24px}.problem-quote{padding:20px;font-size:16px}.preview-grid,.latest-grid{gap:13px}.poster{height:170px}.film-image{height:145px}.film-info{padding:11px}.feature-grid{grid-template-columns:1fr}.feature-card img{height:180px}.channel-grid{grid-template-columns:1fr}.path{grid-template-columns:1fr 1fr}.quote-strip,.faq-list{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr}.article-card{grid-template-columns:92px 1fr}.article-card img{height:72px}.rank-layout{gap:18px}.rank-list li{grid-template-columns:27px 1fr auto auto;gap:7px}.rank-name{font-size:13px}.rank-tag{font-size:10px}.rank-score{font-size:11px}.guarantees{grid-template-columns:1fr 1fr;gap:10px}.final-inner{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr;gap:24px 16px}.footer-about{font-size:12px}}