/* roulang page: index */
:root{
      --ink:#17231f;
      --muted:#6d7a75;
      --paper:#f7f8f4;
      --surface:#ffffff;
      --line:#e3e9e3;
      --green:#1f6a50;
      --green-dark:#124534;
      --lime:#d8ee82;
      --gold:#dfb96b;
      --coral:#dc8066;
      --shadow:0 18px 55px rgba(23,35,31,.09);
      --soft-shadow:0 8px 24px rgba(23,35,31,.07);
      --radius:18px;
      --container:1200px;
    }
    *,*::before,*::after{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;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}
    :focus-visible{outline:3px solid rgba(223,185,107,.75);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .topbar{height:78px;background:rgba(247,248,244,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(16px)}
    .nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
    .brand-mark{width:36px;height:36px;border-radius:11px;background:var(--green);color:var(--lime);display:grid;place-items:center;font-size:17px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.15)}
    .brand-name{font-size:16px}
    .nav{display:flex;align-items:center;gap:27px}
    .nav a{color:#65736e;font-size:14px;position:relative;padding:28px 0;transition:.25s ease}
    .nav a:hover,.nav a.active{color:var(--green-dark)}
    .nav a.active::after{content:"";position:absolute;bottom:17px;left:0;width:22px;height:3px;background:var(--coral);border-radius:3px}
    .nav-action{border:1px solid var(--green);color:var(--green)!important;padding:8px 16px!important;border-radius:9px}
    .nav-action:hover{background:var(--green);color:#fff!important}
    .menu-toggle{display:none;background:none;border:0;color:var(--green);font-size:24px}
    .hero{padding:72px 0 60px;background:#eef1e8;overflow:hidden}
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:12px;font-weight:800;letter-spacing:.13em;text-transform:uppercase;margin-bottom:18px}
    .eyebrow::before{content:"";width:26px;height:2px;background:var(--coral)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,70px);line-height:1.14;letter-spacing:-.03em;margin-bottom:22px;max-width:680px}
    h1 em{font-style:normal;color:var(--coral)}
    .hero-copy{color:#5f6d67;font-size:16px;max-width:610px;margin-bottom:30px}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 20px;border-radius:10px;border:1px solid transparent;font-weight:700;transition:.25s ease}
    .btn-primary{background:var(--green);color:#fff;box-shadow:0 8px 18px rgba(31,106,80,.2)}
    .btn-primary:hover{background:var(--green-dark);transform:translateY(-2px)}
    .btn-light{border-color:#cdd8ce;background:transparent;color:var(--green)}
    .btn-light:hover{background:#fff;border-color:var(--green)}
    .hero-stage{position:relative;min-height:410px}
    .stage-image{height:410px;border-radius:24px;box-shadow:var(--shadow);object-position:center}
    .stage-caption{position:absolute;left:22px;right:22px;bottom:22px;background:rgba(18,69,52,.9);color:#fff;padding:17px 19px;border-radius:13px;display:flex;align-items:center;justify-content:space-between;gap:15px}
    .stage-caption small{display:block;color:#c5d8c8;font-size:12px}
    .stage-caption strong{font-size:16px}
    .play-dot{width:42px;height:42px;border-radius:50%;background:var(--lime);color:var(--green-dark);display:grid;place-items:center;font-size:18px;flex:none}
    section{padding:82px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:32px}
    .section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em;margin-bottom:8px}
    h2{font-size:32px;line-height:1.25;letter-spacing:-.02em;margin-bottom:8px}
    .section-head p{max-width:580px;color:var(--muted);margin-bottom:0}
    .kpi-band{padding:27px 0;background:var(--green);color:#fff}
    .kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .kpi{border-right:1px solid rgba(255,255,255,.18);padding-left:24px}
    .kpi:first-child{padding-left:0}.kpi:last-child{border:0}
    .kpi strong{font-size:30px;line-height:1;font-weight:800;display:block;color:var(--lime);margin-bottom:5px}
    .kpi span{font-size:13px;color:#d2e1d5}
    .matrix{background:#fff}
    .matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
    .matrix-item{background:#fff;padding:27px 24px;min-height:184px;transition:.25s}
    .matrix-item:hover{background:#f3f7ed;transform:translateY(-3px)}
    .matrix-icon{color:var(--coral);font-size:24px;margin-bottom:16px}
    h3{font-size:18px;margin-bottom:9px}
    .matrix-item p,.content-card p,.category p,.review p{color:var(--muted);font-size:14px;margin-bottom:0}
    .content-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
    .content-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.3s;box-shadow:0 2px 0 rgba(23,35,31,.02)}
    .content-card:hover{transform:translateY(-5px);box-shadow:var(--soft-shadow)}
    .card-image{height:208px;position:relative;background:#dce4dc}
    .card-image img{height:100%}
    .badge{position:absolute;top:13px;left:13px;background:rgba(18,69,52,.9);color:#fff;border-radius:6px;padding:3px 8px;font-size:11px;font-weight:700}
    .card-body{padding:17px 17px 19px}
    .card-body h3{font-size:16px;margin-bottom:7px}
    .rating{display:flex;justify-content:space-between;align-items:center;margin-top:15px;color:var(--gold);font-weight:800;font-size:13px}
    .rating span{color:#93a099;font-weight:500}
    .feature-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .feature-visual{min-height:350px;border-radius:var(--radius);overflow:hidden;position:relative}
    .feature-visual img{height:100%}
    .feature-label{position:absolute;left:24px;bottom:23px;background:#fff;padding:14px 17px;border-radius:10px;max-width:280px;box-shadow:var(--soft-shadow)}
    .feature-label strong{display:block;margin-bottom:3px}
    .feature-label span{font-size:13px;color:var(--muted)}
    .feature-list{display:grid;gap:12px}
    .feature-row{padding:21px;background:#fff;border:1px solid var(--line);border-radius:14px;display:grid;grid-template-columns:42px 1fr;gap:15px;align-items:start}
    .number{width:34px;height:34px;border-radius:9px;background:#eff4df;color:var(--green);display:grid;place-items:center;font-weight:800}
    .feature-row h3{font-size:16px;margin-bottom:4px}
    .feature-row p{font-size:13px;color:var(--muted);margin:0}
    .alt-section{background:#edf2eb}
    .compare{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .compare-box{padding:29px;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
    .compare-box.emphasis{background:var(--green);color:#fff;border-color:var(--green)}
    .compare-box h3{display:flex;justify-content:space-between;align-items:center}
    .compare-box ul{padding:0;margin:20px 0 0;list-style:none}
    .compare-box li{padding:10px 0;border-top:1px solid var(--line);color:var(--muted)}
    .compare-box.emphasis li{border-color:rgba(255,255,255,.18);color:#d9e8db}
    .compare-box li::before{content:"✓";color:var(--coral);font-weight:bold;margin-right:10px}
    .compare-box.emphasis li::before{color:var(--lime)}
    .categories{display:grid;grid-template-columns:repeat(5,1fr);gap:13px}
    .category{padding:23px 19px;border:1px solid var(--line);background:#fff;border-radius:14px}
    .category strong{font-size:15px;display:block;margin-bottom:9px}
    .category p{font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .milestone{border-top:3px solid var(--coral);padding-top:17px}
    .milestone b{color:var(--coral);font-size:13px}
    .milestone h3{font-size:16px;margin-top:7px}
    .milestone p{color:var(--muted);font-size:13px;margin:0}
    .ranking-area{background:#fff}
    .ranking-list{display:grid;grid-template-columns:1fr 1fr;column-gap:50px}
    .rank{display:grid;grid-template-columns:42px 1fr auto;align-items:center;gap:15px;padding:16px 0;border-bottom:1px solid var(--line)}
    .rank-num{font-size:22px;font-weight:800;color:#c0cbc3}
    .rank:nth-child(-n+3) .rank-num{color:var(--coral)}
    .rank-title{font-weight:700}.rank-title small{display:block;color:var(--muted);font-size:12px;font-weight:400}
    .rank-score{text-align:right;color:var(--gold);font-weight:800;font-size:13px}
    .news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .news{display:grid;grid-template-columns:105px 1fr;gap:15px;background:#fff;border-bottom:1px solid var(--line);padding-bottom:17px}
    .news img{height:82px;border-radius:10px}
    .news h3{font-size:15px;line-height:1.45;margin-bottom:6px}
    .news time{font-size:12px;color:#94a098}
    .trust{background:var(--green-dark);color:#fff}
    .trust .section-head p{color:#cbd9ce}
    .trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .trust-item{border:1px solid rgba(255,255,255,.16);padding:24px;border-radius:14px;background:rgba(255,255,255,.04)}
    .trust-item strong{display:block;color:var(--lime);font-size:17px;margin-bottom:8px}
    .trust-item p{color:#cbd9ce;font-size:13px;margin:0}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{background:#fff;padding:24px;border:1px solid var(--line);border-radius:14px}
    .review .stars{color:var(--gold);letter-spacing:3px;margin-bottom:13px}
    .review cite{display:block;font-style:normal;font-weight:700;margin-top:16px;font-size:13px}
    .review cite span{font-weight:400;color:var(--muted);margin-left:7px}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px}
    summary{font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:15px}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";color:var(--coral);font-size:21px;line-height:1}
    details[open] summary::after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin:13px 25px 0 0}
    .closing{padding:55px 0;background:#f0e9d9}
    .closing-box{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .closing h2{margin-bottom:6px}
    .closing p{color:#6f6b5d;margin:0}
    footer{background:#17231f;color:#cbd7cd;padding:50px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.13)}
    footer .brand{color:#fff;margin-bottom:15px}
    footer .brand-mark{background:var(--lime);color:var(--green-dark)}
    .footer-intro{color:#98aa9e;font-size:13px;max-width:270px}
    footer h3{font-size:14px;color:#fff;margin-bottom:15px}
    footer ul{padding:0;margin:0;list-style:none}
    footer li{margin:8px 0;color:#98aa9e;font-size:13px}
    footer a:hover{color:var(--lime)}
    .copyright{padding-top:20px;color:#7e9184;font-size:12px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
    @media(max-width:1024px){
      .hero-grid{gap:35px}.content-grid{grid-template-columns:repeat(3,1fr)}
      .categories{grid-template-columns:repeat(3,1fr)}.matrix-grid{grid-template-columns:repeat(2,1fr)}
      .news-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .topbar{height:68px}.nav{display:none;position:absolute;left:16px;right:16px;top:63px;background:#fff;border:1px solid var(--line);box-shadow:var(--soft-shadow);padding:10px 18px;flex-direction:column;align-items:stretch;gap:0;border-radius:12px}
      .nav.open{display:flex}.nav a{padding:12px 0;border-bottom:1px solid #edf0ec}.nav a:last-child{border:0}.nav a.active::after{display:none}
      .menu-toggle{display:block}.hero{padding:49px 0 45px}.hero-grid{grid-template-columns:1fr}.hero-stage{min-height:330px}.stage-image{height:330px}
      h1{font-size:43px}.section-head{display:block}.section-head p{margin-top:10px}.kpis{grid-template-columns:repeat(2,1fr);gap:20px}.kpi{border:0;padding-left:0}
      section{padding:58px 0}.feature-grid,.compare{grid-template-columns:1fr}.content-grid{grid-template-columns:repeat(2,1fr)}
      .timeline{grid-template-columns:repeat(2,1fr)}.ranking-list{grid-template-columns:1fr}.trust-grid,.reviews{grid-template-columns:1fr}
      .closing-box{display:block}.closing .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:520px){
      .brand-name{font-size:14px}.hero-copy{font-size:15px}.hero-stage{min-height:280px}.stage-image{height:280px}
      h1{font-size:36px}.actions .btn{width:100%}.content-grid,.matrix-grid,.categories,.news-grid,.faq-grid{grid-template-columns:1fr}
      .card-image{height:220px}.timeline{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:24px}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}
    }