/* roulang page: index */
:root{
            --blue:#1769e0;
            --blue-deep:#0d3f91;
            --cyan:#30b9d4;
            --ink:#17253d;
            --muted:#6c7a91;
            --soft:#f3f7fc;
            --line:#dfe8f4;
            --white:#fff;
            --gold:#f4ad45;
            --danger:#ef6d73;
            --radius:20px;
            --shadow:0 16px 45px rgba(22,67,126,.10);
            --shadow-hover:0 22px 52px rgba(22,67,126,.18);
        }
        *{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth}
        body{
            font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
            color:var(--ink);
            background:#fff;
            line-height:1.7;
            font-size:15px;
        }
        a{color:inherit;text-decoration:none}
        img{display:block;width:100%;object-fit:cover}
        button{font:inherit;border:0;cursor:pointer}
        .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
        .eyebrow{
            color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.16em;
            text-transform:uppercase;margin-bottom:13px
        }
        .section{padding:92px 0;position:relative}
        .section.alt{background:var(--soft)}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px}
        .section-head h2{font-size:clamp(25px,3vw,38px);line-height:1.25;letter-spacing:-.04em}
        .section-head p{max-width:530px;color:var(--muted);font-size:15px}
        .text-link{color:var(--blue);font-weight:700;white-space:nowrap}
        .text-link:hover{text-decoration:underline}
        .site-header{
            position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);
            backdrop-filter:blur(18px);border-bottom:1px solid rgba(223,232,244,.85)
        }
        .nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
        .brand{display:flex;align-items:center;gap:11px;min-width:260px}
        .brand-mark{
            width:38px;height:38px;border-radius:12px;color:#fff;display:grid;place-items:center;
            background:linear-gradient(145deg,var(--blue),var(--cyan));font-weight:900;font-size:15px;
            box-shadow:0 7px 18px rgba(23,105,224,.26)
        }
        .brand-name{font-size:16px;font-weight:800;letter-spacing:-.02em}
        .nav-links{display:flex;align-items:center;gap:6px}
        .nav-links a{padding:10px 13px;border-radius:10px;color:var(--muted);font-weight:700;transition:.2s}
        .nav-links a:hover,.nav-links a.active{color:var(--blue);background:#edf5ff}
        .nav-action{padding:11px 17px;border-radius:11px;background:var(--ink);color:#fff;font-weight:800;transition:.2s}
        .nav-action:hover{background:var(--blue);transform:translateY(-2px)}
        .menu-toggle{display:none;background:#edf5ff;color:var(--blue);width:42px;height:42px;border-radius:11px;font-size:20px}
        .hero{
            min-height:650px;padding:82px 0 76px;overflow:hidden;
            background:
            radial-gradient(circle at 82% 20%,rgba(48,185,212,.22),transparent 29%),
            linear-gradient(135deg,#f5f9ff 0%,#fff 58%,#eef8ff 100%);
        }
        .hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}
        .hero h1{font-size:clamp(40px,5.7vw,72px);line-height:1.1;letter-spacing:-.065em;max-width:720px}
        .hero h1 em{font-style:normal;color:var(--blue);position:relative}
        .hero h1 em:after{content:"";position:absolute;left:4px;right:4px;bottom:-7px;height:7px;border-radius:5px;background:#a8e8f2;z-index:-1}
        .hero-subtitle{font-size:20px;font-weight:800;margin:25px 0 13px;color:var(--blue-deep)}
        .hero-copy{max-width:650px;color:var(--muted);font-size:16px;line-height:2}
        .hero-actions{display:flex;gap:13px;margin-top:28px;flex-wrap:wrap}
        .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 21px;border-radius:12px;font-weight:800;transition:.25s;border:1px solid transparent}
        .btn-primary{background:var(--blue);color:#fff;box-shadow:0 12px 24px rgba(23,105,224,.22)}
        .btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 16px 30px rgba(23,105,224,.28)}
        .btn-light{background:#fff;color:var(--blue);border-color:var(--line)}
        .btn-light:hover{border-color:var(--blue);transform:translateY(-2px)}
        .hero-note{display:flex;gap:20px;margin-top:27px;color:var(--muted);font-size:13px}
        .hero-note strong{display:block;color:var(--ink);font-size:17px}
        .coupon-wall{position:relative;padding:28px;border-radius:28px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);transform:rotate(1.4deg)}
        .coupon-wall:before,.coupon-wall:after{content:"";position:absolute;width:22px;height:22px;border-radius:50%;background:#f5f9ff;top:50%;transform:translateY(-50%)}
        .coupon-wall:before{left:-12px}.coupon-wall:after{right:-12px}
        .coupon-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}
        .coupon-top strong{color:var(--blue);font-size:16px}
        .coupon-main{padding:34px 0 25px;border-bottom:1px dashed #bfd1e6;text-align:center}
        .coupon-main .symbol{font-size:22px;color:var(--blue);font-weight:900}
        .coupon-main h3{font-size:46px;line-height:1;color:var(--ink);margin:9px 0}
        .coupon-main p{color:var(--muted)}
        .coupon-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:19px;gap:15px}
        .coupon-bottom small{color:var(--muted)}
        .coupon-button{background:var(--ink);color:#fff;padding:11px 15px;border-radius:10px;font-weight:800}
        .coupon-button:hover{background:var(--blue)}
        .kpi-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
        .kpi{padding:25px;border:1px solid var(--line);border-radius:17px;background:#fff;box-shadow:0 8px 25px rgba(22,67,126,.05)}
        .kpi strong{font-size:34px;color:var(--blue);line-height:1}
        .kpi span{display:block;color:var(--muted);margin-top:11px}
        .matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .matrix-card{padding:25px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);transition:.25s}
        .matrix-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:#b8d4f7}
        .matrix-icon{width:43px;height:43px;border-radius:13px;background:#edf5ff;color:var(--blue);display:grid;place-items:center;font-weight:900;font-size:18px;margin-bottom:17px}
        .matrix-card h3{font-size:18px;margin-bottom:9px}.matrix-card p{font-size:14px;color:var(--muted)}
        .compare{display:grid;grid-template-columns:1fr 1fr;gap:20px}
        .compare-box{border-radius:22px;padding:30px;border:1px solid var(--line);background:#fff}
        .compare-box.highlight{background:var(--blue-deep);color:#fff;border-color:var(--blue-deep)}
        .compare-box h3{font-size:21px;margin-bottom:19px}.compare-box p{color:var(--muted);margin-bottom:18px}
        .compare-box.highlight p{color:#dbeaff}
        .compare-list{list-style:none;display:grid;gap:13px}
        .compare-list li{display:flex;gap:10px;align-items:flex-start}.compare-list li:before{content:"✓";color:#23b28d;font-weight:900}
        .compare-box.highlight .compare-list li:before{color:#83e1d5}
        .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
        .timeline:before{content:"";position:absolute;top:13px;left:6%;right:6%;height:2px;background:#cfe0f2}
        .milestone{position:relative;padding-right:22px}
        .milestone-dot{width:27px;height:27px;border:7px solid #d8ecff;background:var(--blue);border-radius:50%;position:relative;z-index:1;margin-bottom:19px}
        .milestone h3{font-size:17px;margin-bottom:8px}.milestone p{color:var(--muted);font-size:14px}
        .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
        .content-card{overflow:hidden;border:1px solid var(--line);border-radius:17px;background:#fff;transition:.25s}
        .content-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
        .content-card img{height:205px;filter:saturate(.88)}
        .card-body{padding:17px}.card-meta{display:flex;justify-content:space-between;gap:8px;align-items:center;margin-bottom:9px}
        .badge{display:inline-flex;align-items:center;padding:4px 8px;border-radius:7px;background:#eaf4ff;color:var(--blue);font-size:11px;font-weight:800}
        .badge.gold{background:#fff3df;color:#b97814}.badge.green{background:#e8f8f2;color:#168a68}
        .rating{color:var(--gold);font-weight:800;font-size:13px}.content-card h3{font-size:16px;line-height:1.45}
        .content-card p{font-size:13px;color:var(--muted);margin-top:6px}
        .popular-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
        .popular-card{min-height:230px;border-radius:20px;padding:22px;position:relative;overflow:hidden;color:#fff;display:flex;flex-direction:column;justify-content:end;background-size:cover;background-position:center}
        .popular-card:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 20%,rgba(7,20,48,.9))}
        .popular-card>*{position:relative;z-index:1}.popular-card h3{font-size:20px}.popular-card p{font-size:13px;color:#dbe8fa;margin-top:5px}
        .category-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
        .category{padding:22px 18px;background:#fff;border:1px solid var(--line);border-radius:15px}
        .category h3{font-size:17px;margin-bottom:8px}.category p{font-size:13px;color:var(--muted)}
        .rank-layout{display:grid;grid-template-columns:1fr .62fr;gap:28px;align-items:start}
        .rank-list{background:#fff;border:1px solid var(--line);border-radius:19px;overflow:hidden}
        .rank-item{display:grid;grid-template-columns:42px 1fr 90px 50px;align-items:center;gap:12px;padding:15px 20px;border-bottom:1px solid #edf2f8}
        .rank-item:last-child{border-bottom:0}.rank-num{font-size:20px;font-weight:900;color:#b7c7db}.rank-item:nth-child(-n+3) .rank-num{color:var(--blue)}
        .rank-title{font-weight:800}.rank-title small{display:block;color:var(--muted);font-weight:500;font-size:12px}
        .heat{color:var(--danger);font-size:13px}.rank-score{font-weight:800;color:var(--blue)}
        .rank-aside{background:var(--blue-deep);padding:29px;border-radius:20px;color:#fff}
        .rank-aside h3{font-size:23px;margin-bottom:12px}.rank-aside p{color:#d3e4ff;font-size:14px}
        .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .news-item{display:grid;grid-template-columns:105px 1fr;gap:15px;padding:13px;border:1px solid var(--line);border-radius:15px;background:#fff}
        .news-item img{height:88px;border-radius:10px}.news-item h3{font-size:15px;line-height:1.45}.news-item time{font-size:12px;color:var(--muted);display:block;margin-top:8px}
        .trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .trust{padding:28px;background:#fff;border-radius:18px;border:1px solid var(--line)}
        .trust strong{display:block;font-size:18px;margin-bottom:8px}.trust p{color:var(--muted);font-size:14px}
        .quick{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .quick-item{padding:23px;border-left:4px solid var(--cyan);background:#fff;box-shadow:0 8px 22px rgba(22,67,126,.06)}
        .quick-item h3{font-size:17px;margin-bottom:7px}.quick-item p{font-size:14px;color:var(--muted)}
        .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}
        .faq{padding:22px 24px;border:1px solid var(--line);border-radius:15px;background:#fff}
        .faq h3{font-size:16px;margin-bottom:8px}.faq p{font-size:14px;color:var(--muted)}
        .final-cta{padding:74px 0;background:linear-gradient(120deg,#0d3f91,#1769e0);color:#fff}
        .final-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.final-inner h2{font-size:clamp(26px,4vw,42px);line-height:1.25}.final-inner p{color:#dceaff;margin-top:10px;max-width:600px}.final-inner .btn{background:#fff;color:var(--blue)}
        footer{background:#101d31;color:#b7c6da;padding:58px 0 23px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;margin-bottom:45px}
        footer .brand-name{color:#fff}.footer-title{color:#fff;font-weight:800;margin-bottom:15px}footer p{font-size:13px;line-height:1.9}
        footer ul{list-style:none;display:grid;gap:9px;font-size:13px}footer a:hover{color:#fff}
        .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:12px;color:#8294ad}
        :focus-visible{outline:3px solid #76d9ef;outline-offset:3px}
        @media(max-width:1024px){
            .hero-grid{gap:35px}.matrix,.kpi-grid{grid-template-columns:repeat(2,1fr)}
            .content-grid{grid-template-columns:repeat(3,1fr)}.category-grid{grid-template-columns:repeat(3,1fr)}
        }
        @media(max-width:768px){
            .container{width:min(100% - 28px,620px)}.section{padding:65px 0}
            .nav-links{display:none;position:absolute;top:76px;left:14px;right:14px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
            .nav-links.open{display:flex}.nav-links a{text-align:center}.nav-action{display:none}.menu-toggle{display:block}
            .hero{padding:60px 0}.hero-grid{grid-template-columns:1fr}.coupon-wall{max-width:510px;margin:0 auto}
            .section-head{display:block}.section-head p{margin-top:12px}.text-link{display:inline-block;margin-top:15px}
            .content-grid,.popular-grid,.news-grid{grid-template-columns:repeat(2,1fr)}
            .rank-layout{grid-template-columns:1fr}.timeline{grid-template-columns:repeat(2,1fr);gap:27px}.timeline:before{display:none}
            .trust-grid,.quick{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}
        }
        @media(max-width:520px){
            body{font-size:14px}.brand{min-width:0}.brand-name{font-size:13px;max-width:190px}.brand-mark{width:34px;height:34px}
            .hero h1{font-size:42px}.hero-subtitle{font-size:18px}.hero-copy{font-size:14px}
            .hero-note{gap:12px}.hero-note strong{font-size:15px}.coupon-wall{padding:21px}.coupon-main h3{font-size:38px}
            .kpi-grid,.matrix,.content-grid,.popular-grid,.category-grid,.news-grid,.trust-grid,.quick,.faq-grid,.compare{grid-template-columns:1fr}
            .content-card img{height:235px}.popular-card{min-height:250px}.rank-item{grid-template-columns:31px 1fr 48px}.rank-item .heat{display:none}
            .timeline{grid-template-columns:1fr}.final-inner{display:block}.final-inner .btn{margin-top:22px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-grid>div:first-child{grid-column:1/-1}
        }