/* roulang page: index */
:root{
            --ink:#20242b;
            --muted:#737984;
            --soft:#f6f7f9;
            --paper:#ffffff;
            --line:#e8e9ed;
            --accent:#d14f65;
            --accent-dark:#a9344d;
            --gold:#d99a43;
            --night:#24232b;
            --radius:22px;
            --shadow:0 18px 50px rgba(38,34,42,.09);
            --shadow-hover:0 24px 60px rgba(38,34,42,.16);
            --max:1180px;
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
        a{color:inherit;text-decoration:none}
        img{display:block;width:100%;object-fit:cover}
        button,input{font:inherit}
        button{border:0;cursor:pointer}
        :focus-visible{outline:3px solid rgba(209,79,101,.35);outline-offset:3px}
        .container{width:min(var(--max),calc(100% - 44px));margin:0 auto}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
        .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
        .section{padding:100px 0}
        .section-muted{background:var(--soft)}
        .section-dark{background:var(--night);color:#fff}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}
        .section-head h2{font-size:clamp(28px,3.2vw,44px);line-height:1.2;letter-spacing:-.02em;margin-top:10px}
        .section-head p{max-width:570px;color:var(--muted);font-size:15px}
        .section-dark .section-head p{color:#bcbcc5}
        .topbar{height:78px;border-bottom:1px solid rgba(32,36,43,.08);background:rgba(255,255,255,.92);backdrop-filter:blur(16px);position:sticky;top:0;z-index:20}
        .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
        .brand{display:flex;align-items:center;gap:11px;font-weight:800;white-space:nowrap}
        .brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#df6a76,#b83f5a);display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:0 8px 18px rgba(209,79,101,.22)}
        .brand-name{font-size:16px}
        .nav{display:flex;align-items:center;gap:25px;color:#656a73;font-size:14px}
        .nav a{padding:26px 0;position:relative;transition:.25s}
        .nav a:hover,.nav a.active{color:var(--accent)}
        .nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--accent)}
        .nav-cta{padding:10px 17px!important;border-radius:99px;background:#f9e8eb;color:var(--accent)!important;font-weight:700}
        .nav-cta:after{display:none}
        .menu-toggle{display:none;background:none;font-size:24px;color:var(--ink)}
        .hero{position:relative;min-height:690px;overflow:hidden;background:#f8f3f2}
        .hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(248,243,242,.98) 0%,rgba(248,243,242,.85) 43%,rgba(248,243,242,.18) 100%);z-index:1}
        .hero-image{position:absolute;inset:0 0 0 43%;background:url("https://images.unsplash.com/photo-1534528741775-53994a69daeb?auto=format&fit=crop&w=1800&q=88") center/cover no-repeat}
        .hero-inner{position:relative;z-index:2;min-height:690px;display:grid;grid-template-columns:1fr 390px;align-items:center;gap:60px}
        .hero-copy{padding:70px 0}
        .hero h1{font-size:clamp(36px,5vw,68px);line-height:1.12;letter-spacing:-.04em;max-width:720px;margin:18px 0 20px}
        .hero h1 em{font-style:normal;color:var(--accent)}
        .hero-lead{font-size:18px;line-height:1.9;color:#5e626b;max-width:690px}
        .hero-actions{display:flex;gap:13px;margin-top:30px;flex-wrap:wrap}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:12px;font-size:14px;font-weight:700;transition:.25s;border:1px solid transparent}
        .btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 20px rgba(209,79,101,.22)}
        .btn-primary:hover{background:var(--accent-dark);transform:translateY(-2px);box-shadow:0 14px 26px rgba(209,79,101,.27)}
        .btn-light{background:#fff;border-color:var(--line);color:var(--ink)}
        .btn-light:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
        .hero-note{display:flex;gap:18px;align-items:center;margin-top:30px;color:#7b7f88;font-size:12px}
        .hero-note strong{color:var(--ink);font-size:21px;margin-right:4px}
        .survey{background:rgba(255,255,255,.86);backdrop-filter:blur(18px);border:1px solid rgba(255,255,255,.9);border-radius:24px;padding:25px;box-shadow:var(--shadow)}
        .survey-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
        .survey-top b{font-size:16px}
        .survey-step{color:var(--accent);font-size:12px}
        .survey-question{font-size:19px;font-weight:800;line-height:1.45;margin-bottom:16px}
        .choice{display:flex;align-items:center;justify-content:space-between;width:100%;text-align:left;padding:13px 14px;background:#fafafa;border:1px solid var(--line);border-radius:12px;margin-top:9px;color:#50545c;transition:.2s}
        .choice span:last-child{color:#b3b5ba}
        .choice:hover,.choice.selected{border-color:var(--accent);background:#fff4f5;color:var(--accent)}
        .survey-result{margin-top:20px;padding:15px;border-radius:15px;background:#282731;color:#fff}
        .survey-result small{color:#bdbbc4;font-size:11px}
        .survey-result strong{display:block;font-size:19px;margin-top:3px}
        .survey-result p{font-size:12px;color:#cbcbd1;margin-top:4px}
        .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .feature{padding:26px;background:#fff;border:1px solid var(--line);border-radius:18px;transition:.25s}
        .feature:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
        .feature-icon{width:42px;height:42px;border-radius:13px;background:#f9e8eb;color:var(--accent);display:grid;place-items:center;font-size:20px;margin-bottom:18px}
        .feature h3{font-size:19px;margin-bottom:8px}
        .feature p{font-size:14px;color:var(--muted);line-height:1.8}
        .gallery-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
        .gallery-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;transition:.25s}
        .gallery-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
        .gallery-img{height:245px;position:relative;overflow:hidden}
        .gallery-img img{height:100%;transition:transform .5s}
        .gallery-card:hover .gallery-img img{transform:scale(1.05)}
        .badge{position:absolute;top:12px;left:12px;padding:4px 8px;border-radius:7px;background:rgba(32,32,38,.78);color:#fff;font-size:11px;font-weight:700}
        .badge.red{background:var(--accent)}
        .gallery-info{padding:15px}
        .gallery-info h3{font-size:15px;margin-bottom:7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
        .meta{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}
        .rating{color:var(--gold);font-weight:700}
        .audience-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px}
        .audience-card{padding:30px;border-radius:20px;min-height:220px;border:1px solid var(--line);background:#fff}
        .audience-card.dark{background:#2b2931;color:#fff;border-color:#2b2931}
        .audience-card h3{font-size:23px;margin:14px 0 10px}
        .audience-card p{font-size:14px;color:var(--muted);max-width:450px}
        .audience-card.dark p{color:#c8c6cd}
        .number{font-size:13px;font-weight:800;color:var(--accent)}
        .matching{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
        .match-main{padding:34px;border-radius:22px;background:linear-gradient(135deg,#352f39,#5d3d4a);color:#fff;position:relative;overflow:hidden}
        .match-main:after{content:"";position:absolute;width:240px;height:240px;border:1px solid rgba(255,255,255,.16);border-radius:50%;right:-70px;top:-80px}
        .match-main h3{font-size:30px;line-height:1.3;max-width:430px;margin:18px 0}
        .match-main p{color:#d4cdd2;max-width:490px;font-size:14px}
        .match-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:25px}
        .tag{font-size:12px;padding:6px 10px;border-radius:99px;background:rgba(255,255,255,.1);color:#eee}
        .match-list{border:1px solid var(--line);border-radius:22px;padding:16px;background:#fff}
        .match-item{display:flex;align-items:center;gap:15px;padding:16px;border-bottom:1px solid var(--line)}
        .match-item:last-child{border-bottom:0}
        .match-num{width:35px;height:35px;border-radius:11px;background:#f9e8eb;color:var(--accent);display:grid;place-items:center;font-weight:800}
        .match-item h4{font-size:15px}
        .match-item p{font-size:12px;color:var(--muted)}
        .channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .channel{padding:24px 20px;border:1px solid var(--line);border-radius:17px;background:#fff;transition:.25s}
        .channel:hover{border-color:#e4a3ad;box-shadow:var(--shadow)}
        .channel b{display:block;font-size:18px;margin-bottom:8px}
        .channel p{font-size:13px;color:var(--muted);line-height:1.75}
        .popular-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .popular-card{position:relative;min-height:310px;border-radius:20px;overflow:hidden;color:#fff}
        .popular-card img{height:100%;position:absolute;inset:0}
        .popular-card:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(22,21,27,.88))}
        .popular-copy{position:absolute;z-index:1;left:22px;right:22px;bottom:20px}
        .popular-copy h3{font-size:20px;margin-bottom:4px}
        .popular-copy p{color:#ddd;font-size:12px}
        .rank-wrap{display:grid;grid-template-columns:1fr .8fr;gap:24px}
        .rank-list{background:#fff;border-radius:20px;padding:9px 22px;color:var(--ink)}
        .rank-row{display:grid;grid-template-columns:42px 1fr 100px 48px;align-items:center;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
        .rank-row:last-child{border-bottom:0}
        .rank-no{font-size:22px;font-weight:800;color:#c8c9ce}
        .rank-row:nth-child(1) .rank-no{color:var(--accent)}
        .rank-title{font-size:14px;font-weight:700}
        .rank-cat{font-size:11px;color:var(--muted);margin-top:2px}
        .heat{font-size:12px;color:var(--accent)}
        .rank-score{font-size:13px;color:var(--gold);font-weight:700}
        .rank-aside{padding:32px;border:1px solid rgba(255,255,255,.15);border-radius:20px;background:rgba(255,255,255,.06)}
        .rank-aside h3{font-size:25px;line-height:1.35;margin:17px 0}
        .rank-aside p{color:#bebdc5;font-size:14px}
        .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .news-card{display:grid;grid-template-columns:110px 1fr;gap:15px;padding-bottom:20px;border-bottom:1px solid var(--line)}
        .news-card img{height:88px;border-radius:12px}
        .news-card h3{font-size:15px;line-height:1.5}
        .news-card time{font-size:11px;color:var(--muted);display:block;margin-top:8px}
        .assurance{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .assurance-item{padding:24px 18px;background:#fff;border:1px solid var(--line);border-radius:16px}
        .assurance-item b{display:block;margin-bottom:7px}
        .assurance-item p{font-size:12px;color:var(--muted);line-height:1.7}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px 35px}
        details{border-bottom:1px solid var(--line);padding:20px 0}
        summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:15px}
        summary:after{content:"+";color:var(--accent);font-size:22px;line-height:1}
        details[open] summary:after{content:"−"}
        details p{color:var(--muted);font-size:14px;line-height:1.8;margin-top:12px;padding-right:25px}
        .closing{padding:68px 0;background:#f9e8eb}
        .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
        .closing h2{font-size:clamp(26px,3vw,40px);line-height:1.3}
        .closing p{color:#75717a;margin-top:8px}
        footer{background:#24232b;color:#fff;padding:62px 0 25px}
        .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px;padding-bottom:45px;border-bottom:1px solid rgba(255,255,255,.12)}
        .footer-brand p{font-size:13px;color:#aaa8b2;max-width:290px;margin-top:16px;line-height:1.8}
        footer h4{font-size:14px;margin-bottom:15px}
        footer ul{list-style:none}
        footer li{margin:9px 0;color:#aaa8b2;font-size:13px}
        footer li a:hover{color:#fff}
        .copyright{display:flex;justify-content:space-between;gap:20px;color:#898791;font-size:11px;padding-top:22px}
        .fixed-bar{position:fixed;right:22px;bottom:22px;z-index:10;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:10px 12px;display:flex;align-items:center;gap:12px;font-size:12px}
        .fixed-bar strong{color:var(--accent)}
        @media(max-width:1024px){
            .hero-inner{grid-template-columns:1fr 330px;gap:25px}
            .hero-image{left:35%}
            .gallery-grid{grid-template-columns:repeat(3,1fr)}
            .channel-grid{grid-template-columns:repeat(3,1fr)}
            .footer-grid{grid-template-columns:1.3fr repeat(3,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(100% - 32px,var(--max))}
            .topbar{height:68px}
            .nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 16px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}
            .nav.open{display:flex}
            .nav a{padding:12px 8px}
            .nav a.active:after{display:none}
            .menu-toggle{display:block}
            .hero{min-height:800px}
            .hero-image{left:0;top:47%;opacity:.32}
            .hero:before{background:linear-gradient(180deg,#f8f3f2 0%,rgba(248,243,242,.9) 48%,rgba(248,243,242,.3) 100%)}
            .hero-inner{display:block;min-height:800px}
            .hero-copy{padding:60px 0 25px}
            .survey{max-width:450px;margin:0 auto}
            .section{padding:72px 0}
            .section-head{display:block}
            .section-head p{margin-top:14px}
            .feature-grid,.popular-grid{grid-template-columns:1fr 1fr}
            .gallery-grid{grid-template-columns:repeat(2,1fr);gap:14px}
            .gallery-img{height:220px}
            .audience-layout,.matching,.rank-wrap{grid-template-columns:1fr}
            .channel-grid{grid-template-columns:repeat(2,1fr)}
            .news-grid{grid-template-columns:1fr 1fr}
            .assurance{grid-template-columns:1fr 1fr}
            .footer-grid{grid-template-columns:1fr 1fr}
            .footer-brand{grid-column:1/-1}
            .closing-inner{display:block}
            .closing-inner .btn{margin-top:22px}
        }
        @media(max-width:520px){
            .brand-name{font-size:14px}
            .hero h1{font-size:38px}
            .hero-lead{font-size:15px}
            .hero-note{gap:10px}
            .feature-grid,.popular-grid,.news-grid,.faq-grid{grid-template-columns:1fr}
            .gallery-img{height:190px}
            .gallery-info{padding:12px}
            .gallery-info h3{font-size:14px}
            .channel-grid,.assurance{grid-template-columns:1fr 1fr}
            .channel{padding:19px 15px}
            .channel b{font-size:16px}
            .rank-list{padding:8px 14px}
            .rank-row{grid-template-columns:32px 1fr 66px 38px;gap:7px}
            .rank-title{font-size:13px}
            .rank-no{font-size:18px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:25px}
            .copyright{display:block}
            .copyright span{display:block;margin-top:7px}
            .fixed-bar{left:14px;right:14px;bottom:12px;justify-content:space-between}
        }