/* roulang page: index */
:root {
            --ink: #14231f;
            --muted: #66736f;
            --paper: #f7f8f5;
            --white: #ffffff;
            --line: #dfe6e1;
            --deep: #10251f;
            --green: #1d6b52;
            --green-dark: #14503e;
            --lime: #d8efb5;
            --gold: #c79a4b;
            --soft: #edf3ee;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 18px 45px rgba(19, 43, 34, .10);
            --shadow-sm: 0 8px 22px rgba(19, 43, 34, .07);
            --container: 1180px;
        }

        * { 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: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        img { display: block; max-width: 100%; }
        a { color: inherit; text-decoration: none; }
        button, input, textarea { font: inherit; }
        button { cursor: pointer; }
        :focus-visible { outline: 3px solid rgba(199, 154, 75, .55); outline-offset: 3px; }

        .container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--green);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: .08em;
        }
        .eyebrow::before {
            content: "";
            width: 22px;
            height: 2px;
            background: var(--gold);
        }
        h1, h2, h3, p { margin-top: 0; }
        h1, h2, h3 { line-height: 1.25; letter-spacing: 0; }
        h1 { font-size: clamp(42px, 6vw, 76px); margin-bottom: 22px; }
        h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 16px; }
        h3 { font-size: 20px; margin-bottom: 10px; }
        .section-head { max-width: 700px; margin-bottom: 42px; }
        .section-head p { color: var(--muted); max-width: 660px; margin-bottom: 0; }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(247, 248, 245, .94);
            border-bottom: 1px solid rgba(223, 230, 225, .9);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            min-height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            color: var(--deep);
            white-space: nowrap;
        }
        .brand-mark {
            width: 34px;
            height: 34px;
            display: grid;
            place-items: center;
            background: var(--deep);
            color: var(--lime);
            border-radius: 9px;
            font-size: 17px;
            font-weight: 900;
        }
        .brand-name { font-size: 16px; letter-spacing: .02em; }
        .main-nav { display: flex; align-items: center; gap: 8px; }
        .main-nav a {
            padding: 9px 16px;
            border-radius: 8px;
            color: var(--muted);
            font-size: 14px;
            transition: color .2s ease, background .2s ease;
        }
        .main-nav a:hover, .main-nav a.active { color: var(--green); background: var(--soft); }
        .nav-action {
            color: var(--white) !important;
            background: var(--green) !important;
            padding: 10px 18px !important;
        }
        .nav-action:hover { background: var(--green-dark) !important; }

        .hero {
            min-height: 690px;
            display: flex;
            align-items: center;
            color: var(--white);
            background:
                linear-gradient(90deg, rgba(10, 29, 23, .94) 0%, rgba(10, 29, 23, .76) 43%, rgba(10, 29, 23, .25) 100%),
                url("https://images.unsplash.com/photo-1497366754035-f200968a6e72?auto=format&fit=crop&w=2000&q=88") center/cover;
        }
        .hero-inner {
            width: 100%;
            display: grid;
            grid-template-columns: minmax(0, 1.04fr) minmax(320px, .7fr);
            gap: 80px;
            align-items: center;
            padding: 86px 0;
        }
        .hero-copy { max-width: 690px; }
        .hero .eyebrow { color: var(--lime); }
        .hero h1 { max-width: 650px; }
        .hero-text {
            max-width: 650px;
            color: rgba(255,255,255,.82);
            font-size: 18px;
            margin-bottom: 32px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }
        .button {
            display: inline-flex;
            justify-content: center;
            align-items: center;
            min-height: 48px;
            padding: 11px 21px;
            border: 1px solid transparent;
            border-radius: 8px;
            font-weight: 700;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }
        .button:hover { transform: translateY(-2px); box-shadow: 0 10px 22px rgba(10, 29, 23, .16); }
        .button-primary { background: var(--lime); color: var(--deep); }
        .button-secondary { color: var(--white); border-color: rgba(255,255,255,.35); background: rgba(255,255,255,.08); }
        .hero-note { display: flex; gap: 28px; flex-wrap: wrap; color: rgba(255,255,255,.72); font-size: 13px; }
        .hero-note strong { display: block; color: var(--white); font-size: 22px; line-height: 1.2; }
        .vertical-visual {
            justify-self: end;
            width: min(100%, 325px);
            aspect-ratio: .73;
            padding: 15px;
            border: 1px solid rgba(255,255,255,.35);
            border-radius: 22px;
            background: rgba(255,255,255,.10);
            box-shadow: 0 30px 70px rgba(0,0,0,.25);
            transform: rotate(2deg);
        }
        .vertical-visual-inner {
            height: 100%;
            position: relative;
            overflow: hidden;
            border-radius: 14px;
            background:
                linear-gradient(180deg, rgba(8,29,22,.04), rgba(8,29,22,.82)),
                url("https://images.unsplash.com/photo-1529156069898-49953e39b3ac?auto=format&fit=crop&w=900&q=85") center/cover;
        }
        .visual-label {
            position: absolute;
            left: 20px;
            right: 20px;
            bottom: 20px;
        }
        .visual-label small { color: var(--lime); font-weight: 700; }
        .visual-label strong { display: block; color: var(--white); font-size: 24px; line-height: 1.35; }

        section { padding: 96px 0; }
        .metrics { background: var(--white); padding: 28px 0; border-bottom: 1px solid var(--line); }
        .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
        .metric { padding: 12px 28px; border-right: 1px solid var(--line); }
        .metric:first-child { padding-left: 0; }
        .metric:last-child { border-right: 0; }
        .metric strong { display: block; color: var(--green); font-size: 32px; line-height: 1.25; }
        .metric span { color: var(--muted); font-size: 14px; }

        .capability { background: var(--paper); }
        .capability-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
        .capability-item {
            display: grid;
            grid-template-columns: 54px 1fr;
            gap: 18px;
            padding: 28px;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: var(--white);
            box-shadow: var(--shadow-sm);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .capability-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
        .icon-box {
            width: 46px;
            height: 46px;
            display: grid;
            place-items: center;
            color: var(--green);
            border-radius: 10px;
            background: var(--lime);
            font-weight: 900;
            font-size: 18px;
        }
        .capability-item p, .case-card p, .news-item p { color: var(--muted); font-size: 14px; margin-bottom: 0; }

        .matrix { background: var(--deep); color: var(--white); }
        .matrix .section-head p { color: rgba(255,255,255,.68); }
        .matrix-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; align-items: start; }
        .matrix-list { border-top: 1px solid rgba(255,255,255,.2); }
        .matrix-row {
            display: grid;
            grid-template-columns: 42px 1fr auto;
            gap: 18px;
            align-items: center;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255,255,255,.2);
        }
        .matrix-row b { color: var(--lime); font-size: 13px; }
        .matrix-row span { color: rgba(255,255,255,.7); font-size: 14px; }
        .matrix-tag { color: var(--lime) !important; font-size: 13px !important; }

        .parameters { background: #eef3ef; }
        .parameter-table { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow-sm); }
        .parameter-row { display: grid; grid-template-columns: 1.1fr 1fr 1.3fr; border-bottom: 1px solid var(--line); }
        .parameter-row:last-child { border-bottom: 0; }
        .parameter-row > div { padding: 19px 24px; border-right: 1px solid var(--line); }
        .parameter-row > div:last-child { border-right: 0; }
        .parameter-head { color: var(--green); background: var(--soft); font-weight: 800; }
        .parameter-row:not(.parameter-head) > div:first-child { font-weight: 700; }
        .parameter-row:not(.parameter-head) > div:not(:first-child) { color: var(--muted); font-size: 14px; }

        .comparison { background: var(--white); }
        .comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .compare-box { padding: 30px; border-radius: var(--radius); border: 1px solid var(--line); }
        .compare-box.highlight { color: var(--white); background: var(--green); border-color: var(--green); }
        .compare-box ul { padding: 0; margin: 22px 0 0; list-style: none; }
        .compare-box li { padding: 11px 0 11px 25px; border-top: 1px solid var(--line); position: relative; font-size: 14px; }
        .compare-box.highlight li { border-color: rgba(255,255,255,.22); }
        .compare-box li::before { content: "✓"; position: absolute; left: 0; color: var(--gold); font-weight: 900; }

        .cases { background: var(--paper); }
        .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .case-card { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
        .case-image { height: 190px; background-size: cover; background-position: center; }
        .case-card:nth-child(1) .case-image { background-image: url("https://images.unsplash.com/photo-1556761175-b413da4baf72?auto=format&fit=crop&w=900&q=85"); }
        .case-card:nth-child(2) .case-image { background-image: url("https://images.unsplash.com/photo-1531058020387-3be344556be6?auto=format&fit=crop&w=900&q=85"); }
        .case-card:nth-child(3) .case-image { background-image: url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=900&q=85"); }
        .case-body { padding: 24px; }
        .case-meta { display: inline-block; margin-bottom: 13px; color: var(--green); font-size: 12px; font-weight: 800; }

        .timeline { background: var(--white); }
        .timeline-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
        .timeline-step { position: relative; padding: 28px 24px 10px 0; }
        .timeline-step::before { content: ""; position: absolute; top: -6px; left: 0; width: 11px; height: 11px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px var(--white), 0 0 0 6px var(--green); }
        .timeline-step + .timeline-step { padding-left: 24px; border-left: 1px solid var(--line); }
        .timeline-step b { display: block; margin-bottom: 12px; color: var(--gold); font-size: 13px; }
        .timeline-step p { color: var(--muted); font-size: 14px; margin-bottom: 0; }

        .news { background: #eef3ef; }
        .news-list { border-top: 1px solid var(--line); }
        .news-item { display: grid; grid-template-columns: 110px 1fr 120px; gap: 26px; align-items: center; padding: 23px 0; border-bottom: 1px solid var(--line); }
        .news-date { color: var(--green); font-weight: 800; font-size: 14px; }
        .news-item h3 { margin-bottom: 3px; font-size: 18px; }
        .news-type { justify-self: end; padding: 5px 11px; border-radius: 20px; background: var(--white); color: var(--muted); font-size: 12px; }

        .trust { background: var(--white); }
        .trust-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
        .partner-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
        .partner { min-height: 76px; display: grid; place-items: center; padding: 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); background: var(--paper); font-weight: 800; font-size: 14px; text-align: center; }
        .trust-points { display: grid; gap: 14px; }
        .trust-point { display: flex; gap: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--line); }
        .trust-point b { color: var(--green); }
        .trust-point p { color: var(--muted); margin: 3px 0 0; font-size: 14px; }

        .answers { background: var(--deep); color: var(--white); }
        .answers-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
        .answer { padding: 25px; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); }
        .answer b { display: block; color: var(--lime); margin-bottom: 10px; }
        .answer p { color: rgba(255,255,255,.72); font-size: 14px; margin-bottom: 0; }

        .contact { background: var(--paper); }
        .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; align-items: start; }
        .contact-copy p { color: var(--muted); }
        .contact-list { display: grid; gap: 13px; margin-top: 28px; }
        .contact-list span { color: var(--green); font-weight: 700; }
        .lead-form { padding: 32px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); }
        .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
        .field { display: grid; gap: 7px; }
        .field.full { grid-column: 1 / -1; }
        label { color: var(--ink); font-size: 13px; font-weight: 700; }
        input, textarea {
            width: 100%;
            padding: 13px 14px;
            border: 1px solid var(--line);
            border-radius: 8px;
            color: var(--ink);
            background: #fbfcfa;
            transition: border .2s ease, box-shadow .2s ease;
        }
        input:focus, textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(29,107,82,.12); outline: 0; }
        textarea { min-height: 125px; resize: vertical; }
        .form-submit { margin-top: 20px; border: 0; }
        .form-message { display: none; margin-top: 15px; color: var(--green); font-size: 14px; font-weight: 700; }

        footer { padding: 42px 0 24px; color: rgba(255,255,255,.68); background: var(--deep); }
        .footer-main { display: flex; justify-content: space-between; gap: 30px; align-items: flex-start; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,.15); }
        footer .brand { color: var(--white); }
        footer .brand-mark { background: var(--lime); color: var(--deep); }
        .footer-copy { max-width: 360px; margin-top: 15px; font-size: 13px; }
        .footer-links { display: flex; gap: 25px; font-size: 14px; }
        .footer-links a:hover { color: var(--lime); }
        .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; font-size: 12px; }

        @media (max-width: 1024px) {
            .hero-inner { gap: 40px; }
            .matrix-layout, .trust-layout, .contact-layout { gap: 40px; }
            section { padding: 78px 0; }
        }
        @media (max-width: 768px) {
            .container { width: min(var(--container), calc(100% - 32px)); }
            .nav-wrap { min-height: 68px; }
            .brand-name { font-size: 14px; }
            .main-nav a { padding: 8px 10px; }
            .nav-action { display: none; }
            .hero { min-height: auto; }
            .hero-inner, .matrix-layout, .trust-layout, .contact-layout { grid-template-columns: 1fr; }
            .hero-inner { padding: 72px 0 78px; }
            .vertical-visual { justify-self: start; width: min(72vw, 290px); }
            .metric-grid { grid-template-columns: repeat(2, 1fr); }
            .metric { padding: 15px 18px; border-bottom: 1px solid var(--line); }
            .metric:nth-child(odd) { padding-left: 0; }
            .capability-grid, .case-grid, .answers-grid { grid-template-columns: 1fr 1fr; }
            .timeline-list { grid-template-columns: repeat(2, 1fr); }
            .timeline-step:nth-child(3) { border-left: 0; padding-left: 0; }
            .timeline-step:nth-child(n+3) { border-top: 1px solid var(--line); }
        }
        @media (max-width: 520px) {
            h1 { font-size: 42px; }
            h2 { font-size: 32px; }
            section { padding: 62px 0; }
            .main-nav { gap: 0; }
            .main-nav a:not(.active) { display: none; }
            .hero-text { font-size: 16px; }
            .hero-actions .button { width: 100%; }
            .metric-grid, .capability-grid, .case-grid, .comparison-grid, .answers-grid, .timeline-list { grid-template-columns: 1fr; }
            .metric { border-right: 0; padding-left: 0 !important; }
            .parameter-table { overflow-x: auto; }
            .parameter-row { min-width: 650px; }
            .news-item { grid-template-columns: 1fr; gap: 5px; }
            .news-type { justify-self: start; }
            .form-grid { grid-template-columns: 1fr; }
            .field.full { grid-column: auto; }
            .lead-form { padding: 22px; }
            .footer-main, .footer-bottom { flex-direction: column; }
            .footer-links { flex-wrap: wrap; }
        }