/* roulang page: index */
:root{
            --ink:#18212f;
            --muted:#718096;
            --soft:#f5f7fb;
            --paper:#ffffff;
            --line:#e7ebf2;
            --brand:#ef5b47;
            --brand-deep:#c93b43;
            --gold:#f4b94d;
            --teal:#1ca89a;
            --violet:#6f63d8;
            --shadow:0 18px 50px rgba(31,43,72,.10);
            --shadow-sm:0 8px 24px rgba(31,43,72,.08);
            --radius:22px;
            --radius-sm:14px;
            --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;font-size:15px}
        a{color:inherit;text-decoration:none}
        img{display:block;width:100%;object-fit:cover}
        button,input{font:inherit}
        button{cursor:pointer;border:0}
        :focus-visible{outline:3px solid rgba(239,91,71,.35);outline-offset:3px}
        .container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
        .eyebrow:before{content:"";width:24px;height:3px;border-radius:10px;background:var(--brand)}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:28px}
        .section-head h2{font-size:clamp(24px,3vw,36px);line-height:1.25;letter-spacing:0}
        .section-head p{max-width:570px;color:var(--muted);font-size:14px}
        .more{color:var(--brand);font-weight:700;white-space:nowrap}
        .more span{margin-left:5px}
        .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(16px);border-bottom:1px solid rgba(231,235,242,.8)}
        .nav-wrap{height:76px;display:flex;align-items:center;gap:30px}
        .brand{display:flex;align-items:center;gap:11px;min-width:max-content;font-weight:900}
        .brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(140deg,var(--brand),#f49a57);color:#fff;font-size:18px;box-shadow:0 8px 18px rgba(239,91,71,.25)}
        .brand-name{font-size:16px}
        .main-nav{display:flex;align-items:center;gap:5px;flex:1}
        .main-nav a{padding:9px 13px;border-radius:10px;color:#647084;font-size:14px;font-weight:700;transition:.2s}
        .main-nav a:hover,.main-nav a.active{color:var(--brand);background:#fff1ed}
        .nav-search{width:178px;height:40px;border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;padding:0 12px;gap:8px;background:#fafbfc}
        .nav-search input{border:0;outline:0;background:transparent;width:100%;font-size:13px;color:var(--ink)}
        .nav-search button{background:transparent;color:var(--brand);font-size:17px}
        .menu-toggle{display:none;background:transparent;font-size:24px;color:var(--ink)}
        .hero{position:relative;min-height:560px;display:flex;align-items:center;overflow:hidden;background:#19243a;color:#fff}
        .hero-bg{position:absolute;inset:0;background:linear-gradient(90deg,rgba(15,23,40,.95) 0%,rgba(15,23,40,.82) 43%,rgba(15,23,40,.22) 100%),url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=88") center/cover}
        .hero-content{position:relative;z-index:1;padding:76px 0 84px;max-width:760px}
        .hero-tag{display:inline-flex;padding:7px 13px;border:1px solid rgba(255,255,255,.28);border-radius:30px;background:rgba(255,255,255,.08);font-size:13px;color:#f7d8bd}
        .hero h1{font-size:clamp(38px,5.5vw,70px);line-height:1.12;letter-spacing:0;margin:20px 0 18px;max-width:760px}
        .hero h1 em{font-style:normal;color:#ffad63}
        .hero-lead{font-size:17px;color:rgba(255,255,255,.82);max-width:690px;line-height:1.9}
        .hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:12px;font-weight:800;transition:.2s;border:1px solid transparent}
        .btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 22px rgba(239,91,71,.25)}
        .btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px)}
        .btn-light{background:#fff;color:var(--ink)}
        .btn-light:hover{background:#fff0e8;transform:translateY(-2px)}
        .hero-stats{display:flex;gap:26px;margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.2)}
        .hero-stats strong{display:block;font-size:22px;color:#fff}
        .hero-stats span{display:block;font-size:12px;color:rgba(255,255,255,.62)}
        section{padding:82px 0}
        .section-soft{background:var(--soft)}
        .category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
        .category{padding:23px 20px;border:1px solid var(--line);border-radius:18px;background:#fff;transition:.25s}
        .category:hover{transform:translateY(-5px);box-shadow:var(--shadow-sm);border-color:#f6c1b7}
        .category-icon{font-size:27px;margin-bottom:14px}
        .category h3{font-size:17px;margin-bottom:6px}
        .category p{font-size:13px;color:var(--muted);line-height:1.7}
        .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
        .video-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;transition:.25s}
        .video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#f4c3ba}
        .thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#ddd}
        .thumb img{height:100%;transition:.35s}
        .video-card:hover .thumb img{transform:scale(1.05)}
        .badge{position:absolute;top:11px;left:11px;padding:4px 8px;border-radius:7px;background:rgba(24,33,47,.84);color:#fff;font-size:11px;font-weight:800}
        .badge.hot{background:var(--brand)}
        .card-body{padding:15px 16px 17px}
        .card-body h3{font-size:16px;line-height:1.4;margin-bottom:9px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
        .card-meta{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}
        .score{color:#e18b28;font-weight:800}
        .popular-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .popular-card{display:grid;grid-template-columns:142px 1fr;gap:16px;padding:14px;border:1px solid var(--line);border-radius:18px;background:#fff}
        .popular-card .thumb{aspect-ratio:1/1.15;border-radius:12px}
        .popular-card h3{font-size:17px;margin:7px 0 10px}
        .popular-card p{font-size:13px;color:var(--muted);line-height:1.65}
        .news-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:26px}
        .news-feature{position:relative;min-height:350px;border-radius:22px;overflow:hidden;color:#fff;background:#333}
        .news-feature img{height:100%}
        .news-feature:after{content:"";position:absolute;inset:30% 0 0;background:linear-gradient(transparent,rgba(16,25,42,.9))}
        .news-caption{position:absolute;z-index:1;left:26px;right:26px;bottom:23px}
        .news-caption h3{font-size:24px;line-height:1.35;margin-top:8px}
        .news-list{display:flex;flex-direction:column;gap:12px}
        .news-item{display:grid;grid-template-columns:116px 1fr;gap:14px;align-items:center;padding:10px;border-bottom:1px solid var(--line)}
        .news-item img{height:78px;border-radius:11px}
        .news-item h3{font-size:15px;line-height:1.45;margin-bottom:5px}
        .news-item time{font-size:12px;color:var(--muted)}
        .rank-section{background:#172337;color:#fff}
        .rank-section .section-head p{color:#a8b4c6}
        .rank-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 30px}
        .rank-row{display:grid;grid-template-columns:38px 1fr auto auto;align-items:center;gap:12px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.1)}
        .rank-no{font-size:20px;font-weight:900;color:#708099}
        .rank-row:nth-child(-n+3) .rank-no{color:#f4b94d}
        .rank-title{font-weight:700}
        .rank-type{font-size:11px;padding:3px 8px;border:1px solid rgba(255,255,255,.2);border-radius:20px;color:#b8c4d5}
        .rank-score{color:#ffbe69;font-weight:800;font-size:13px}
        .evidence-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .evidence{padding:28px;border-radius:20px;background:#fff;border:1px solid var(--line)}
        .evidence strong{display:block;font-size:38px;color:var(--brand);line-height:1.1;margin-bottom:9px}
        .evidence h3{font-size:17px;margin-bottom:8px}
        .evidence p{font-size:13px;color:var(--muted)}
        .partner-row{display:flex;gap:14px;flex-wrap:wrap}
        .partner{flex:1 1 180px;padding:22px 20px;border:1px solid var(--line);border-radius:15px;text-align:center;background:#fff;font-weight:800;color:#68758a}
        .partner small{display:block;color:#a4adba;font-weight:500;font-size:11px;margin-top:3px}
        .guarantee{background:#fff5ed}
        .guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .guarantee-item{padding:20px;border-left:3px solid var(--brand)}
        .guarantee-item h3{font-size:16px;margin-bottom:6px}
        .guarantee-item p{font-size:13px;color:var(--muted)}
        .trial{padding:0 0 84px;background:var(--soft)}
        .trial-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:35px;align-items:center;padding:42px;border-radius:24px;background:linear-gradient(135deg,#f05d48,#ce3e52);color:#fff;box-shadow:var(--shadow)}
        .trial h2{font-size:31px;line-height:1.3;margin:9px 0 13px}
        .trial p{color:rgba(255,255,255,.82);max-width:560px}
        .trial-form{display:flex;gap:9px;padding:7px;background:#fff;border-radius:13px}
        .trial-form input{width:100%;min-width:0;border:0;outline:0;padding:8px 12px;color:var(--ink)}
        .trial-form .btn{padding:10px 15px;white-space:nowrap}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .faq{padding:22px;border:1px solid var(--line);border-radius:16px;background:#fff}
        .faq h3{font-size:16px;margin-bottom:8px}
        .faq p{color:var(--muted);font-size:13px;line-height:1.8}
        .site-footer{background:#111b2b;color:#d8deea;padding:58px 0 22px}
        .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:42px}
        .footer-brand{color:#fff;font-size:18px;font-weight:900;margin-bottom:12px}
        .footer-col h3{font-size:14px;color:#fff;margin-bottom:14px}
        .footer-col a,.footer-col p{display:block;color:#9ba8bb;font-size:13px;margin:8px 0}
        .footer-col a:hover{color:#ff9d72}
        .footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:19px;color:#8391a5;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
        @media(max-width:1024px){
            .main-nav{gap:0}.main-nav a{padding:9px 8px}.nav-search{width:145px}
            .category-grid{grid-template-columns:repeat(3,1fr)}
            .content-grid{grid-template-columns:repeat(3,1fr)}
            .popular-grid{grid-template-columns:repeat(2,1fr)}
            .guarantee-grid{grid-template-columns:repeat(2,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(var(--max),calc(100% - 28px))}
            .nav-wrap{height:68px}.menu-toggle{display:block;margin-left:auto}
            .main-nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm);flex-wrap:wrap}
            .main-nav.open{display:flex}.main-nav a{flex:1 0 30%;text-align:center}
            .nav-search{display:none}.hero{min-height:570px}.hero-content{padding:68px 0}
            section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:12px}
            .content-grid{grid-template-columns:repeat(2,1fr)}
            .news-layout,.trial-inner{grid-template-columns:1fr}.trial-inner{padding:30px}
            .rank-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}
        }
        @media(max-width:520px){
            .brand-name{font-size:14px}.hero h1{font-size:39px}.hero-lead{font-size:15px}
            .hero-stats{gap:17px}.hero-stats strong{font-size:18px}
            .category-grid,.content-grid,.popular-grid,.evidence-grid,.faq-grid{grid-template-columns:1fr}
            .popular-card{grid-template-columns:120px 1fr}.guarantee-grid{grid-template-columns:1fr}
            .news-feature{min-height:280px}.news-item{grid-template-columns:95px 1fr}
            .trial-form{display:block;background:transparent;padding:0}.trial-form input{width:100%;border-radius:10px;margin-bottom:9px}.trial-form .btn{width:100%}
            .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}
        }