/* roulang page: index */
:root{
            --ink:#252a22;
            --muted:#697064;
            --paper:#f8f7f1;
            --cream:#efeee5;
            --line:#d9ddd0;
            --leaf:#657c35;
            --leaf-dark:#435725;
            --fruit:#d39b2f;
            --clay:#b56f55;
            --white:#fffefa;
            --shadow:0 16px 40px rgba(44,52,36,.09);
            --soft-shadow:0 8px 22px rgba(44,52,36,.07);
            --radius:16px;
            --max:1240px;
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{
            margin:0;
            color:var(--ink);
            background:var(--paper);
            font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            overflow-x:hidden;
        }
        a{color:inherit;text-decoration:none;transition:color .25s ease,background .25s ease,border .25s ease,transform .25s ease}
        a:hover{color:var(--leaf-dark)}
        img{max-width:100%;display:block}
        button,input,textarea{font:inherit}
        button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{
            outline:3px solid rgba(211,155,47,.5);
            outline-offset:3px;
        }
        .container{max-width:var(--max);margin:0 auto;padding:0 28px}
        .site-header{
            position:sticky;top:0;z-index:20;
            background:rgba(248,247,241,.92);
            backdrop-filter:blur(14px);
            border-bottom:1px solid rgba(116,127,98,.18);
            transition:box-shadow .25s ease;
        }
        .site-header.scrolled{box-shadow:0 8px 24px rgba(46,54,37,.08)}
        .nav-wrap{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
        .brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
        .brand-mark{
            width:35px;height:35px;border-radius:11px 11px 11px 4px;
            background:var(--leaf);color:#fff;display:grid;place-items:center;font-size:18px;
            box-shadow:4px 4px 0 var(--fruit);
        }
        .brand small{display:block;color:var(--muted);font-size:10px;line-height:1.2;letter-spacing:.12em;font-weight:600}
        .main-nav{display:flex;align-items:center;gap:27px;margin-left:auto}
        .main-nav a{font-size:14px;color:#535a4d;position:relative}
        .main-nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-8px;height:2px;background:var(--fruit);transition:right .25s ease}
        .main-nav a:hover:after,.main-nav a.active:after{right:0}
        .nav-action{background:var(--leaf);color:#fff!important;padding:10px 17px;border-radius:8px;font-weight:700}
        .nav-action:hover{background:var(--leaf-dark);transform:translateY(-1px)}
        .menu-toggle{display:none;background:transparent;border:1px solid var(--line);padding:8px 11px;border-radius:8px;color:var(--ink)}
        .hero{
            min-height:650px;
            display:flex;align-items:center;
            position:relative;color:#fff;
            background:linear-gradient(90deg,rgba(28,36,23,.84) 0%,rgba(39,47,30,.67) 48%,rgba(39,47,30,.28) 100%),url('/assets/images/363ad5ee8afc586c.jpg') center/cover;
        }
        .hero:after{content:"";position:absolute;inset:auto 0 0;height:80px;background:linear-gradient(transparent,var(--paper))}
        .hero-content{position:relative;z-index:1;padding:100px 0 128px}
        .eyebrow,.section-kicker{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--fruit);font-weight:800}
        .hero .eyebrow{color:#e8c774}
        h1,h2,h3{margin:0;color:var(--ink);font-weight:800;line-height:1.2;letter-spacing:-.035em}
        h1{font-size:clamp(38px,5vw,68px);max-width:730px;margin:18px 0 22px;color:#fff}
        .hero-copy{max-width:690px;font-size:18px;line-height:1.9;color:rgba(255,255,255,.86);margin:0 0 31px}
        .button-row{display:flex;gap:13px;align-items:center;flex-wrap:wrap}
        .button{
            display:inline-flex;align-items:center;justify-content:center;
            min-height:48px;padding:0 22px;border-radius:8px;border:1px solid transparent;
            font-weight:700;font-size:14px;cursor:pointer;transition:transform .25s ease,background .25s ease,box-shadow .25s ease;
        }
        .button:hover{transform:translateY(-2px)}
        .button.primary{background:var(--fruit);color:#fff;box-shadow:0 8px 18px rgba(211,155,47,.22)}
        .button.primary:hover{background:#b88321}
        .button.ghost{border-color:rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.06)}
        .button.ghost:hover{background:rgba(255,255,255,.16)}
        .button.dark{background:var(--leaf);color:#fff}
        .button.dark:hover{background:var(--leaf-dark)}
        .hero-notes{display:flex;gap:25px;flex-wrap:wrap;margin-top:50px;padding-top:18px;border-top:1px solid rgba(255,255,255,.25);max-width:710px}
        .hero-notes span{font-size:13px;color:rgba(255,255,255,.8)}
        .hero-notes b{color:#fff;margin-right:6px}
        section{padding:104px 0;position:relative}
        .section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:45px}
        .section-head h2{font-size:clamp(29px,3.5vw,47px);max-width:650px;margin-top:10px}
        .section-intro{max-width:490px;color:var(--muted);margin:0}
        .warm{background:var(--cream)}
        .leaf-band{background:var(--leaf);color:#fff}
        .leaf-band h2,.leaf-band h3{color:#fff}
        .leaf-band .section-kicker{color:#f2cd75}
        .leaf-band .section-intro{color:rgba(255,255,255,.76)}
        .overview-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
        .overview-main{background:var(--leaf-dark);color:#fff;padding:42px;min-height:280px;position:relative;overflow:hidden}
        .overview-main:after{content:"黄果";position:absolute;right:-15px;bottom:-47px;font-size:170px;line-height:1;color:rgba(255,255,255,.06);font-weight:900}
        .overview-main h3{color:#fff;font-size:30px;max-width:420px}
        .overview-main p{color:rgba(255,255,255,.78);max-width:470px}
        .metric-row{display:flex;gap:35px;margin-top:31px}
        .metric strong{display:block;font-size:27px;color:#f0c967}
        .metric span{font-size:12px;color:rgba(255,255,255,.67)}
        .overview-side{display:grid;grid-template-columns:1fr 1fr;gap:14px}
        .metric-card{background:var(--white);border:1px solid var(--line);padding:25px 22px;display:flex;flex-direction:column;justify-content:space-between;min-height:132px}
        .metric-card b{font-size:19px}
        .metric-card span{font-size:13px;color:var(--muted)}
        .feature-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:58px;align-items:start}
        .feature-lead{position:sticky;top:110px}
        .feature-lead h2{font-size:42px;margin:12px 0 18px}
        .feature-lead p{color:var(--muted)}
        .feature-list{border-top:1px solid var(--line)}
        .feature-item{display:grid;grid-template-columns:64px 1fr 110px;gap:18px;align-items:start;padding:28px 0;border-bottom:1px solid var(--line)}
        .feature-no{font-size:13px;color:var(--fruit);font-weight:800;letter-spacing:.1em}
        .feature-item h3{font-size:22px;margin-bottom:7px}
        .feature-item p{margin:0;color:var(--muted);font-size:14px}
        .feature-tag{font-size:12px;color:var(--leaf);border-left:2px solid var(--fruit);padding-left:10px}
        .scene-track{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
        .scene-card{min-height:285px;padding:26px 22px;display:flex;flex-direction:column;justify-content:space-between;background:#f8f6ec;border:1px solid #d8d8c8}
        .scene-card:nth-child(2){background:#e4e9d9;transform:translateY(22px)}
        .scene-card:nth-child(3){background:#e9d9c9}
        .scene-card:nth-child(4){background:#e7e5d9;transform:translateY(22px)}
        .scene-index{font-size:12px;color:var(--clay);font-weight:800}
        .scene-card h3{font-size:24px;margin-top:28px}
        .scene-card p{font-size:14px;color:#62685b;margin:10px 0 0}
        .scene-link{font-size:13px;font-weight:700;color:var(--leaf-dark);margin-top:20px}
        .demo-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center}
        .screen-stage{background:#222b1c;padding:30px 30px 0;min-height:420px;position:relative;overflow:hidden}
        .screen-stage:before{content:"";position:absolute;inset:0;background:url('/assets/images/4f2142246aba91ee.jpg') center/cover;opacity:.25}
        .screen-frame{position:relative;background:#f9f8f0;border:8px solid #171b15;border-bottom:0;max-width:480px;margin:0 auto;padding:19px 19px 0;box-shadow:0 0 0 1px rgba(255,255,255,.16)}
        .screen-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:13px}
        .screen-block{height:68px;background:#e6ebdc;margin:17px 0 12px;padding:12px;color:var(--leaf-dark);font-size:12px;font-weight:700}
        .screen-lines{display:grid;grid-template-columns:1fr 1fr;gap:10px}
        .screen-lines span{display:block;background:#efeee7;height:45px;border-left:3px solid var(--fruit)}
        .demo-copy h2{font-size:41px;margin:12px 0 18px}
        .demo-copy p{color:var(--muted)}
        .steps{margin-top:29px;border-top:1px solid var(--line)}
        .step{display:flex;gap:17px;padding:17px 0;border-bottom:1px solid var(--line)}
        .step b{width:29px;height:29px;border-radius:50%;background:var(--fruit);color:#fff;text-align:center;line-height:29px;font-size:13px;flex:none}
        .step span{font-size:14px}
        .case-layout{display:grid;grid-template-columns:1fr 1.2fr;gap:26px}
        .case-intro{padding:36px;background:url('/assets/images/559d192338f7dddc.jpg') center/cover;min-height:360px;display:flex;flex-direction:column;justify-content:flex-end;color:#fff;position:relative}
        .case-intro:before{content:"";position:absolute;inset:0;background:linear-gradient(transparent,rgba(25,31,20,.78))}
        .case-intro>*{position:relative}
        .case-intro h3{color:#fff;font-size:31px}
        .case-intro p{color:rgba(255,255,255,.82);font-size:14px}
        .case-sheet{background:var(--white);border:1px solid var(--line);padding:35px}
        .case-row{display:grid;grid-template-columns:100px 1fr;gap:22px;padding:19px 0;border-bottom:1px solid var(--line)}
        .case-row:last-child{border-bottom:0}
        .case-row strong{color:var(--leaf-dark);font-size:14px}
        .case-row span{color:var(--muted);font-size:14px}
        .plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .plan{background:var(--white);border:1px solid var(--line);padding:31px 28px;min-height:350px;display:flex;flex-direction:column}
        .plan.featured{border:2px solid var(--leaf);transform:translateY(-12px);box-shadow:var(--shadow)}
        .plan-label{font-size:12px;color:var(--fruit);font-weight:800;letter-spacing:.1em}
        .plan h3{font-size:27px;margin:13px 0 8px}
        .plan p{font-size:14px;color:var(--muted);margin:0 0 21px}
        .plan ul{list-style:none;padding:0;margin:0 0 25px;border-top:1px solid var(--line)}
        .plan li{padding:10px 0;border-bottom:1px solid var(--line);font-size:13px;color:#566052}
        .plan li:before{content:"✓";color:var(--leaf);font-weight:800;margin-right:8px}
        .plan .button{margin-top:auto}
        .quote-wall{display:grid;grid-template-columns:1.05fr .7fr 1.25fr;gap:16px;align-items:start}
        .quote{background:var(--white);border:1px solid var(--line);padding:28px}
        .quote:nth-child(2){margin-top:48px;background:#e5eadb}
        .quote:nth-child(3){margin-top:18px;background:#eee1d4}
        .quote p{font-size:19px;line-height:1.65;margin:0 0 22px}
        .quote small{color:var(--muted);font-size:12px}
        .voice-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:center}
        .voice-layout h2{font-size:42px;margin:12px 0 17px}
        .voice-layout p{color:var(--muted)}
        .voice-bars{border-left:1px solid var(--line);padding-left:38px}
        .voice-bar{padding:17px 0;border-bottom:1px solid var(--line)}
        .voice-bar header{display:flex;justify-content:space-between;margin-bottom:8px;font-size:14px;font-weight:700}
        .bar-track{height:8px;background:#dfe3d6}
        .bar-track i{display:block;height:100%;background:var(--leaf);width:78%}
        .voice-bar:nth-child(2) i{width:86%;background:var(--fruit)}
        .voice-bar:nth-child(3) i{width:70%;background:var(--clay)}
        .voice-bar:nth-child(4) i{width:82%;background:#879a5d}
        .news-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:17px}
        .news-card{background:var(--white);border:1px solid var(--line);padding:25px;min-height:245px;display:flex;flex-direction:column}
        .news-card:first-child{background:#e5eadb}
        .news-meta{font-size:12px;color:var(--clay);display:flex;justify-content:space-between}
        .news-card h3{font-size:21px;margin:24px 0 10px}
        .news-card p{font-size:13px;color:var(--muted);margin:0}
        .news-card a{margin-top:auto;padding-top:20px;font-size:13px;color:var(--leaf-dark);font-weight:800}
        .faq-wrap{max-width:880px;margin:0 auto}
        .faq-item{border-top:1px solid var(--line)}
        .faq-question{width:100%;background:none;border:0;text-align:left;padding:22px 45px 22px 0;position:relative;font-weight:800;color:var(--ink);cursor:pointer}
        .faq-question:after{content:"+";position:absolute;right:5px;top:18px;color:var(--fruit);font-size:23px;font-weight:400}
        .faq-item.open .faq-question:after{content:"−"}
        .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 45px 22px 0}
        .faq-item.open .faq-answer{display:block}
        .closing{padding:92px 0;background:linear-gradient(105deg,#3e5425,#677a38);color:#fff}
        .closing-inner{display:flex;align-items:center;justify-content:space-between;gap:35px}
        .closing h2{color:#fff;font-size:clamp(30px,4vw,49px);max-width:680px}
        .closing p{color:rgba(255,255,255,.77);max-width:640px;margin:14px 0 0}
        .site-footer{background:#23291f;color:#dbe0d0;padding:62px 0 25px}
        .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding-bottom:43px;border-bottom:1px solid rgba(255,255,255,.14)}
        .footer-brand{font-size:21px;font-weight:800;color:#fff}
        .footer-grid p{font-size:13px;color:#aeb8a4;max-width:270px}
        .footer-title{font-size:13px;color:#f0c967;font-weight:800;margin-bottom:15px}
        .footer-links{display:flex;flex-direction:column;gap:8px;font-size:13px;color:#b9c1b1}
        .footer-links a:hover{color:#fff}
        .copyright{display:flex;justify-content:space-between;gap:20px;padding-top:22px;font-size:12px;color:#8e9888}
        @media(max-width:1024px){
            .main-nav{gap:15px}
            .main-nav a{font-size:13px}
            .scene-track{grid-template-columns:repeat(2,1fr)}
            .scene-card:nth-child(2),.scene-card:nth-child(4){transform:none}
            .feature-layout,.demo-layout,.voice-layout{gap:35px}
        }
        @media(max-width:768px){
            .container{padding:0 20px}
            .nav-wrap{min-height:68px}
            .menu-toggle{display:block}
            .main-nav{display:none;position:absolute;left:15px;right:15px;top:68px;background:var(--white);padding:16px;border:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}
            .main-nav.is-open{display:flex}
            .main-nav a{padding:12px 10px;border-bottom:1px solid var(--line)}
            .main-nav .nav-action{text-align:center;margin-top:10px}
            .hero{min-height:620px}
            .hero-content{padding:75px 0 100px}
            .hero-copy{font-size:16px}
            section{padding:75px 0}
            .section-head,.closing-inner{display:block}
            .section-intro{margin-top:16px}
            .overview-grid,.feature-layout,.demo-layout,.case-layout,.voice-layout{grid-template-columns:1fr}
            .feature-lead{position:static}
            .feature-item{grid-template-columns:42px 1fr}
            .feature-tag{grid-column:2}
            .screen-stage{min-height:330px;padding:23px 18px 0}
            .plans{grid-template-columns:1fr}
            .plan.featured{transform:none}
            .quote-wall,.news-grid{grid-template-columns:1fr}
            .quote:nth-child(2),.quote:nth-child(3){margin-top:0}
            .voice-bars{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}
            .closing .button-row{margin-top:25px}
            .footer-grid{grid-template-columns:1fr 1fr}
            .copyright{display:block}
            .copyright span{display:block;margin-top:8px}
        }
        @media(max-width:520px){
            h1{font-size:38px}
            .hero-notes{gap:12px;display:grid;grid-template-columns:1fr 1fr}
            .overview-main{padding:28px 23px}
            .overview-side{grid-template-columns:1fr}
            .metric-row{gap:20px}
            .scene-track{display:flex;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory}
            .scene-card{min-width:78%;scroll-snap-align:start}
            .demo-copy h2,.voice-layout h2{font-size:34px}
            .case-sheet{padding:22px}
            .case-row{grid-template-columns:78px 1fr;gap:12px}
            .footer-grid{grid-template-columns:1fr}
        }