/* roulang page: index */
:root{
            --blue:#1769d1;--blue-dark:#0d4fa8;--blue-soft:#eaf3ff;--orange:#e8a62b;
            --ink:#17253b;--muted:#68778e;--line:#dce6f2;--paper:#fff;--bg:#f5f8fc;
            --radius:18px;--shadow:0 14px 38px rgba(29,75,125,.10);--shadow-sm:0 7px 22px rgba(29,75,125,.08);
        }
        *{box-sizing:border-box}
        html{scroll-behavior:smooth}
        body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75}
        a{color:inherit;text-decoration:none}
        img{display:block;max-width:100%}
        button,input,select,textarea{font:inherit}
        :focus-visible{outline:3px solid rgba(23,105,209,.28);outline-offset:3px}
        .container{max-width:1180px}
        .site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 3px 16px rgba(26,63,104,.05)}
        .navbar{padding:15px 0}
        .navbar-brand{display:flex;align-items:center;gap:10px;font-size:1.2rem;font-weight:800;letter-spacing:.02em}
        .brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;font-size:16px;box-shadow:0 5px 12px rgba(23,105,209,.25)}
        .navbar-nav{gap:7px}
        .nav-link{color:#506078!important;padding:9px 14px!important;border-radius:10px;font-size:.94rem;font-weight:600}
        .nav-link:hover,.nav-link.active{color:var(--blue)!important;background:var(--blue-soft)}
        .nav-cta{margin-left:12px;padding:10px 18px!important}
        .btn-brand{background:var(--blue);border:1px solid var(--blue);color:#fff;border-radius:11px;padding:12px 22px;font-weight:700;transition:.2s ease}
        .btn-brand:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(23,105,209,.2)}
        .btn-brand:active{transform:translateY(0)}
        .btn-outline-brand{background:#fff;border:1px solid #b9d2ef;color:var(--blue);border-radius:11px;padding:12px 22px;font-weight:700;transition:.2s ease}
        .btn-outline-brand:hover{background:var(--blue-soft);border-color:var(--blue);color:var(--blue-dark)}
        .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue);font-size:.82rem;font-weight:800;letter-spacing:.08em}
        .eyebrow:before{content:"";width:22px;height:3px;border-radius:5px;background:var(--orange)}
        h1,h2,h3,h4{font-weight:800;letter-spacing:-.025em;line-height:1.28}
        h1{font-size:clamp(2.35rem,5vw,4.2rem);margin:16px 0 22px}
        h2{font-size:clamp(1.8rem,3vw,2.55rem);margin:10px 0 16px}
        h3{font-size:1.2rem;margin:0 0 10px}
        .section{padding:102px 0}
        .section-alt{background:#fff}
        .section-heading{max-width:710px;margin-bottom:42px}
        .section-heading p{color:var(--muted);font-size:1.05rem;margin:0}
        .hero{padding:88px 0 80px;background:#f7fbff;overflow:hidden}
        .hero-copy{max-width:665px}
        .hero-copy p{font-size:1.1rem;color:#586982;max-width:620px}
        .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}
        .trust-line{display:flex;gap:20px;flex-wrap:wrap;color:#60718a;font-size:.9rem;margin-top:25px}
        .trust-line span{display:flex;align-items:center;gap:7px}
        .trust-line i{width:8px;height:8px;border-radius:50%;background:var(--orange)}
        .hero-stage{position:relative;min-height:390px;padding:24px}
        .hero-image{height:390px;width:100%;object-fit:cover;border-radius:25px;box-shadow:var(--shadow)}
        .interface-card{position:absolute;bottom:8px;left:0;background:#fff;padding:18px 20px;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow-sm);width:210px}
        .interface-card strong{display:block;font-size:1.4rem;color:var(--blue)}
        .interface-card small{color:var(--muted)}
        .section-index{font-size:.78rem;color:var(--blue);font-weight:800;letter-spacing:.1em}
        .function-layout{display:grid;grid-template-columns:220px 1fr;gap:38px}
        .function-nav{border-right:1px solid var(--line);padding-right:24px}
        .function-nav a{display:block;padding:13px 15px;margin-bottom:8px;color:var(--muted);border-radius:10px;font-weight:700}
        .function-nav a:hover,.function-nav a.current{color:var(--blue);background:var(--blue-soft)}
        .function-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
        .card-clean{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);transition:.22s ease}
        .card-clean:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
        .icon-box{width:42px;height:42px;border-radius:12px;background:#fff3d8;color:#a46b00;display:grid;place-items:center;font-weight:800;margin-bottom:20px}
        .card-clean p,.scenario p,.case-card p,.feedback-item p{color:var(--muted);margin:0}
        .result-note{display:flex;gap:8px;align-items:center;margin-top:20px;padding-top:16px;border-top:1px solid var(--line);color:var(--blue);font-size:.9rem;font-weight:700}
        .scenario-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
        .scenario-image{height:430px;width:100%;object-fit:cover;border-radius:24px;box-shadow:var(--shadow)}
        .scenario-list{display:grid;gap:12px}
        .scenario{display:grid;grid-template-columns:45px 1fr;gap:15px;padding:18px;border:1px solid var(--line);border-radius:14px;background:#fff}
        .step-no{width:36px;height:36px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-weight:800}
        .demo-stage{background:#102c54;border-radius:25px;padding:34px;color:#fff;display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center}
        .demo-main-image{width:100%;height:330px;object-fit:cover;border-radius:16px}
        .demo-points{display:grid;gap:16px}
        .demo-point{display:flex;gap:14px;align-items:flex-start}
        .demo-point b{display:block;color:#fff;margin-bottom:3px}
        .demo-point span{font-size:.9rem;color:#c2d5ed}
        .demo-number{color:#f4c15d;font-weight:800;font-size:1.2rem}
        .case-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
        .case-card{padding:34px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
        .case-card.featured{background:var(--blue);color:#fff}
        .featured p,.featured .case-meta{color:#dbeaff}
        .case-meta{color:var(--muted);font-size:.9rem;margin-top:22px}
        .mini-cases{display:grid;gap:18px}
        .mini-cases .card-clean{padding:24px}
        .plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .plan-card{position:relative}
        .plan-card.featured{border:2px solid var(--blue);padding:27px}
        .plan-tag{position:absolute;top:18px;right:18px;background:#fff0c9;color:#8b5c00;padding:4px 9px;border-radius:20px;font-size:.75rem;font-weight:800}
        .plan-card ul{padding:0;margin:22px 0;list-style:none;color:var(--muted)}
        .plan-card li{padding:8px 0;border-bottom:1px solid #edf1f6}
        .plan-card li:before{content:"✓";color:var(--blue);font-weight:800;margin-right:8px}
        .review-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
        .quote{font-size:1.55rem;line-height:1.55;font-weight:700;color:var(--ink);margin:16px 0 25px}
        .review-mark{font-size:4rem;color:var(--orange);line-height:.7}
        .faq .accordion-item{border:1px solid var(--line);border-radius:13px!important;margin-bottom:11px;overflow:hidden}
        .faq .accordion-button{font-weight:700;color:var(--ink);background:#fff;padding:18px 20px;box-shadow:none}
        .faq .accordion-button:not(.collapsed){color:var(--blue);background:var(--blue-soft)}
        .faq .accordion-body{color:var(--muted);padding:0 20px 19px;background:var(--blue-soft)}
        .feedback-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
        .feedback-item{background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px}
        .feedback-label{color:var(--blue);font-size:.82rem;font-weight:800;margin-bottom:12px}
        .guide-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:25px}
        .guide-main{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
        .guide-main img{width:100%;height:240px;object-fit:cover}
        .guide-main .guide-body{padding:25px}
        .guide-list{display:grid;gap:12px}
        .guide-list a{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 20px;display:flex;justify-content:space-between;gap:12px;align-items:center;transition:.2s}
        .guide-list a:hover{border-color:#a9c9ee;transform:translateX(3px)}
        .guide-list small{display:block;color:var(--muted);margin-top:4px}
        .arrow{color:var(--blue);font-size:1.2rem}
        .cta-panel{background:#eaf3ff;border:1px solid #c9def5;border-radius:25px;padding:54px}
        .cta-panel h2{max-width:560px}
        .cta-panel p{color:#58708d;max-width:590px}
        .form-label{font-size:.88rem;font-weight:700;color:#415570;margin-bottom:7px}
        .form-control,.form-select{border:1px solid #cbd9e8;border-radius:10px;padding:12px 14px;background:#fff}
        .form-control:focus,.form-select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(23,105,209,.12)}
        .privacy{color:#718198;font-size:.78rem;margin-top:12px}
        .site-footer{background:#102c54;color:#c5d5e8;padding:55px 0 25px}
        .footer-brand{color:#fff;font-weight:800;font-size:1.2rem}
        .footer-title{color:#fff;font-size:.95rem;font-weight:800;margin-bottom:14px}
        .footer-links{list-style:none;padding:0;margin:0;display:grid;gap:7px;font-size:.9rem}
        .footer-links a:hover{color:#fff}
        .footer-bottom{border-top:1px solid rgba(255,255,255,.15);margin-top:40px;padding-top:18px;font-size:.82rem;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap}
        @media(max-width:991px){
            .navbar-collapse{background:#fff;padding:14px;border-top:1px solid var(--line);margin-top:12px}
            .nav-cta{margin:8px 0 0!important;text-align:center}
            .hero{padding:65px 0}.function-layout,.scenario-wrap,.review-layout,.guide-layout{grid-template-columns:1fr}
            .function-nav{border:0;padding:0;display:flex;gap:8px;overflow:auto}.function-nav a{white-space:nowrap}
            .demo-stage{grid-template-columns:1fr}.case-layout{grid-template-columns:1fr}
        }
        @media(max-width:767px){
            .section{padding:70px 0}.hero-stage{min-height:auto;padding:22px 0;margin-top:20px}.hero-image{height:290px}
            .interface-card{left:12px;bottom:-12px}.function-grid,.plan-grid,.feedback-grid{grid-template-columns:1fr}
            .cta-panel{padding:30px 22px}.hero-actions .btn{width:100%}
            h1{font-size:2.45rem}
        }
        @media(max-width:520px){
            .container{padding-left:20px;padding-right:20px}.section-heading{margin-bottom:28px}
            .demo-stage{padding:20px}.demo-main-image{height:230px}.trust-line{gap:10px;display:grid}
            .footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:8px}
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}