/* roulang page: index */
:root {
            --bg: #15131d;
            --bg-deep: #0e0d14;
            --surface: #211e2d;
            --surface-2: #29243a;
            --surface-3: #302a45;
            --text: #f4f1f8;
            --muted: #b4adbf;
            --dim: #81798d;
            --line: rgba(231, 224, 244, .13);
            --green: #b8f36a;
            --green-deep: #8acb3e;
            --purple: #a77bff;
            --orange: #f4a36b;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .28);
            --container: 1180px;
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            background:
                radial-gradient(circle at 82% 10%, rgba(167,123,255,.10), transparent 27rem),
                radial-gradient(circle at 8% 37%, rgba(184,243,106,.06), transparent 25rem),
                var(--bg);
            color: var(--text);
            font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            opacity: .16;
            background-image: radial-gradient(rgba(255,255,255,.7) .7px, transparent .8px);
            background-size: 37px 37px;
            mask-image: linear-gradient(to bottom, black, transparent 72%);
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; display: block; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        :focus-visible {
            outline: 3px solid var(--green);
            outline-offset: 4px;
        }
        .container {
            width: min(var(--container), calc(100% - 48px));
            margin: 0 auto;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(14,13,20,.94);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 34px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 285px;
            font-weight: 800;
            letter-spacing: -.03em;
            line-height: 1.18;
        }
        .brand-mark {
            width: 37px;
            height: 37px;
            position: relative;
            flex: 0 0 auto;
            border: 2px solid var(--green);
            border-radius: 50%;
            transform: rotate(-22deg);
        }
        .brand-mark::before,
        .brand-mark::after {
            content: "";
            position: absolute;
            border: 1px solid var(--purple);
            border-radius: 50%;
            inset: 6px -5px;
        }
        .brand-mark::after { inset: -5px 6px; border-color: var(--orange); }
        .brand-name { font-size: 17px; }
        .brand-name span { display: block; color: var(--green); font-size: 12px; font-weight: 600; margin-top: 2px; }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
        }
        .main-nav a {
            position: relative;
            padding: 26px 0 24px;
            color: var(--muted);
            font-size: 14px;
            transition: color .25s ease;
            white-space: nowrap;
        }
        .main-nav a:hover, .main-nav a.active { color: var(--green); }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 16px;
            height: 2px;
            background: var(--green);
        }
        .nav-action, .btn-primary {
            background: var(--green);
            color: #171b11;
            font-weight: 800;
            border: 0;
            border-radius: 10px;
            transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
        }
        .nav-action {
            padding: 11px 17px;
            font-size: 13px;
            white-space: nowrap;
        }
        .nav-action:hover, .btn-primary:hover {
            background: #d0ff91;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(184,243,106,.16);
        }
        .menu-toggle { display: none; background: transparent; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 7px 10px; }

        .hero {
            position: relative;
            padding: 88px 0 76px;
            min-height: 630px;
            display: flex;
            align-items: center;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.04fr .96fr;
            gap: 74px;
            align-items: center;
        }
        .eyebrow, .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            color: var(--green);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
        }
        .eyebrow::before, .section-kicker::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--green);
        }
        h1, h2, h3, p { margin-top: 0; }
        h1 {
            max-width: 720px;
            margin: 20px 0 22px;
            font-size: clamp(36px, 5vw, 66px);
            line-height: 1.16;
            letter-spacing: -.055em;
        }
        h1 em { color: var(--green); font-style: normal; }
        .hero-copy {
            max-width: 590px;
            color: var(--muted);
            font-size: 17px;
            line-height: 1.9;
        }
        .hero-actions { display: flex; gap: 13px; margin-top: 31px; flex-wrap: wrap; }
        .btn-primary, .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 21px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 800;
        }
        .btn-secondary {
            border: 1px solid rgba(167,123,255,.55);
            color: #e4d9ff;
            background: rgba(167,123,255,.08);
            transition: .25s ease;
        }
        .btn-secondary:hover { background: rgba(167,123,255,.18); border-color: var(--purple); transform: translateY(-2px); }
        .hero-note { display: flex; gap: 22px; margin-top: 35px; color: var(--dim); font-size: 12px; }
        .hero-note strong { color: var(--text); font-size: 14px; display: block; }
        .hero-art {
            min-height: 435px;
            position: relative;
            border: 1px solid var(--line);
            border-radius: 42% 18% 35% 20%;
            overflow: hidden;
            background:
                linear-gradient(135deg, rgba(167,123,255,.18), transparent 44%),
                linear-gradient(325deg, rgba(184,243,106,.09), transparent 55%),
                var(--surface);
            box-shadow: var(--shadow);
        }
        .hero-art::before {
            content: "";
            position: absolute;
            width: 410px;
            height: 410px;
            border: 1px solid rgba(184,243,106,.28);
            border-radius: 50%;
            left: 12%;
            top: 9%;
            transform: rotate(-24deg) skewX(-20deg);
        }
        .hero-art::after {
            content: "";
            position: absolute;
            width: 510px;
            height: 160px;
            border: 1px solid rgba(167,123,255,.6);
            border-radius: 50%;
            left: -8%;
            top: 35%;
            transform: rotate(-28deg);
        }
        .orbit-dot {
            position: absolute;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--green);
            box-shadow: 0 0 0 8px rgba(184,243,106,.12);
            top: 21%;
            right: 19%;
        }
        .orbit-dot.purple { background: var(--purple); top: auto; right: auto; bottom: 18%; left: 20%; }
        .stadium-core {
            position: absolute;
            z-index: 2;
            width: 190px;
            height: 190px;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            border-radius: 50%;
            background: radial-gradient(circle at 36% 28%, #51456d, #262037 54%, #15131d 55%);
            border: 1px solid rgba(244,163,107,.72);
            box-shadow: 0 0 0 18px rgba(244,163,107,.04), 0 0 80px rgba(167,123,255,.22);
        }
        .stadium-core::before {
            content: "SPORTS";
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            color: rgba(244,243,248,.68);
            font-size: 12px;
            letter-spacing: .22em;
        }
        .visual-card {
            position: absolute;
            z-index: 3;
            padding: 16px;
            width: 174px;
            border-radius: 14px;
            background: #242032;
            border: 1px solid var(--line);
            box-shadow: 0 18px 35px rgba(0,0,0,.28);
        }
        .visual-card small { display: block; color: var(--dim); font-size: 11px; margin-bottom: 6px; }
        .visual-card strong { display: block; font-size: 14px; line-height: 1.45; }
        .visual-card.one { left: 8%; top: 17%; border-left: 3px solid var(--green); }
        .visual-card.two { right: 7%; bottom: 14%; border-left: 3px solid var(--purple); }
        .section { padding: 92px 0; }
        .section-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 30px; }
        h2 { font-size: clamp(27px, 3.2vw, 42px); line-height: 1.25; letter-spacing: -.04em; margin: 11px 0 0; }
        .section-intro { max-width: 430px; color: var(--muted); margin: 0; }
        .feature-layout {
            display: grid;
            grid-template-columns: 1.5fr .8fr;
            gap: 18px;
        }
        .feature-card, .mini-card, .content-panel, .category-item, .faq-item {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
        }
        .feature-card {
            min-height: 350px;
            padding: 34px;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(115deg, rgba(167,123,255,.25), transparent 48%),
                var(--surface);
        }
        .feature-card::after {
            content: "01";
            position: absolute;
            right: 28px;
            bottom: -20px;
            font-size: 130px;
            line-height: 1;
            font-weight: 900;
            color: rgba(255,255,255,.035);
        }
        .feature-card h3 { max-width: 540px; font-size: 29px; line-height: 1.35; margin: 25px 0 14px; }
        .feature-card p { max-width: 580px; color: var(--muted); }
        .feature-link { position: absolute; bottom: 30px; left: 34px; color: var(--green); font-weight: 800; font-size: 14px; }
        .mini-stack { display: grid; gap: 18px; }
        .mini-card { padding: 25px; transition: transform .25s ease, border-color .25s ease; }
        .mini-card:hover, .category-item:hover, .faq-item:hover { transform: translateY(-3px); border-color: rgba(184,243,106,.42); }
        .mini-card h3 { font-size: 18px; margin: 15px 0 8px; }
        .mini-card p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
        .badge {
            display: inline-flex;
            align-items: center;
            min-height: 24px;
            padding: 0 9px;
            border-radius: 6px;
            background: rgba(184,243,106,.12);
            color: var(--green);
            font-size: 11px;
            font-weight: 800;
        }
        .badge.purple { background: rgba(167,123,255,.14); color: #cdb8ff; }
        .badge.orange { background: rgba(244,163,107,.12); color: var(--orange); }
        .updates-section { background: var(--bg-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
        .updates-layout { display: grid; grid-template-columns: .72fr 1.6fr; gap: 70px; }
        .update-summary p { color: var(--muted); }
        .update-summary .index-number { color: var(--purple); font-size: 72px; line-height: 1; font-weight: 900; letter-spacing: -.08em; }
        .update-list { border-top: 1px solid var(--line); }
        .update-item {
            display: grid;
            grid-template-columns: 92px 1fr auto;
            gap: 21px;
            align-items: center;
            padding: 21px 0;
            border-bottom: 1px solid var(--line);
        }
        .update-date { color: var(--dim); font-size: 12px; }
        .update-title { font-size: 16px; font-weight: 800; margin: 4px 0; }
        .update-excerpt { color: var(--muted); font-size: 13px; margin: 0; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
        .text-link { color: var(--green); font-size: 13px; font-weight: 800; white-space: nowrap; }
        .empty-state { padding: 32px 0; color: var(--muted); }
        .category-index { padding-top: 88px; }
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
        .category-item {
            display: grid;
            grid-template-columns: 64px 1fr auto;
            gap: 18px;
            align-items: center;
            padding: 24px 26px;
            transition: .25s ease;
        }
        .category-no { color: var(--purple); font-size: 25px; font-weight: 900; }
        .category-item h3 { margin: 0 0 5px; font-size: 18px; }
        .category-item p { margin: 0; color: var(--muted); font-size: 13px; }
        .category-arrow { color: var(--green); font-size: 21px; }
        .app-section { padding: 88px 0; }
        .app-panel {
            position: relative;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr .9fr;
            align-items: center;
            gap: 50px;
            padding: 55px 62px;
            border-radius: var(--radius-lg);
            background:
                linear-gradient(115deg, rgba(167,123,255,.30), transparent 52%),
                #29203b;
            border: 1px solid rgba(167,123,255,.42);
        }
        .app-panel::before {
            content: "";
            position: absolute;
            width: 430px;
            height: 430px;
            border: 1px solid rgba(184,243,106,.21);
            border-radius: 50%;
            right: -70px;
            top: -170px;
        }
        .app-panel h2 { max-width: 470px; }
        .app-panel p { color: #d0c8db; max-width: 510px; margin: 18px 0 26px; }
        .device-row { position: relative; min-height: 275px; display: flex; align-items: center; justify-content: center; gap: 14px; }
        .device {
            width: 130px;
            height: 242px;
            padding: 9px;
            border: 5px solid #111018;
            border-radius: 24px;
            background: #3b3350;
            box-shadow: 0 20px 35px rgba(0,0,0,.32);
            transform: rotate(-8deg);
        }
        .device.main { height: 270px; transform: translateY(-12px) rotate(4deg); background: #272232; border-color: #0c0b10; }
        .device-screen { height: 100%; border-radius: 15px; padding: 17px 11px; background: linear-gradient(165deg, #44385f, #1a1724 70%); }
        .screen-line { height: 7px; width: 72%; border-radius: 4px; background: var(--green); margin-bottom: 15px; }
        .screen-line.short { width: 43%; background: var(--purple); }
        .screen-box { height: 56px; border-radius: 8px; margin-top: 14px; background: rgba(255,255,255,.12); border-left: 3px solid var(--orange); }
        .app-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
        .app-tip { color: #c3b8d1; font-size: 12px; }
        .faq-section { padding: 90px 0; }
        .faq-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 80px; }
        .faq-layout > div:first-child p { color: var(--muted); }
        .faq-list { display: grid; gap: 10px; }
        .faq-item { overflow: hidden; transition: .25s ease; }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            padding: 20px 23px;
            color: var(--text);
            background: transparent;
            border: 0;
            text-align: left;
            font-weight: 800;
        }
        .faq-question span:last-child { color: var(--green); font-size: 24px; font-weight: 400; }
        .faq-answer { display: none; padding: 0 23px 22px; color: var(--muted); font-size: 14px; }
        .faq-item.open { border-color: rgba(184,243,106,.47); }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
        .bottom-cta { padding: 30px 0 95px; }
        .cta-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 35px;
            padding: 30px 36px;
            background: var(--surface-2);
            border-left: 3px solid var(--orange);
            border-radius: var(--radius-md);
        }
        .cta-inner h2 { font-size: 25px; margin: 0 0 7px; }
        .cta-inner p { margin: 0; color: var(--muted); font-size: 14px; }
        .site-footer {
            background: var(--bg-deep);
            padding: 64px 0 25px;
            border-top: 1px solid var(--line);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.45fr 1fr 1fr 1.15fr;
            gap: 45px;
            padding-bottom: 47px;
        }
        .footer-brand { color: var(--muted); font-size: 13px; max-width: 310px; }
        .footer-brand .brand { color: var(--text); margin-bottom: 20px; }
        .footer-title { color: var(--text); font-size: 14px; font-weight: 800; margin-bottom: 17px; }
        .footer-links { display: grid; gap: 9px; }
        .footer-links a { color: var(--muted); font-size: 13px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--green); }
        .footer-note { color: var(--dim); font-size: 12px; line-height: 1.8; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 22px;
            border-top: 1px solid var(--line);
            color: var(--dim);
            font-size: 12px;
        }
        .footer-bottom a { color: var(--muted); }
        .footer-bottom a:hover { color: var(--green); }
        @media (max-width: 1024px) {
            .container { width: min(var(--container), calc(100% - 38px)); }
            .nav-wrap { gap: 20px; }
            .brand { min-width: 240px; }
            .main-nav { gap: 16px; }
            .main-nav a { font-size: 13px; }
            .hero-grid { gap: 38px; }
            .app-panel { padding: 45px; gap: 25px; }
            .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
            .footer-grid > div:last-child { grid-column: 2 / 4; }
        }
        @media (max-width: 768px) {
            .site-header { position: relative; }
            .nav-wrap { min-height: 68px; justify-content: space-between; }
            .brand { min-width: 0; }
            .brand-name { font-size: 14px; }
            .brand-name span { font-size: 10px; }
            .menu-toggle { display: block; }
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 19px;
                right: 19px;
                padding: 12px 18px 18px;
                background: #191621;
                border: 1px solid var(--line);
                border-radius: 0 0 16px 16px;
                box-shadow: var(--shadow);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
            }
            .main-nav.show { display: flex; }
            .main-nav a { padding: 13px 2px; border-bottom: 1px solid var(--line); }
            .main-nav a:last-child { border-bottom: 0; }
            .main-nav a.active::after { left: -18px; right: auto; bottom: 0; top: 0; width: 3px; height: auto; }
            .nav-action { display: none; }
            .hero { padding: 65px 0 55px; min-height: 0; }
            .hero-grid, .updates-layout, .faq-layout, .app-panel { grid-template-columns: 1fr; }
            .hero-art { min-height: 370px; margin-top: 15px; }
            .section, .faq-section, .app-section { padding: 66px 0; }
            .updates-layout { gap: 35px; }
            .category-grid { grid-template-columns: 1fr; }
            .app-panel { padding: 38px 27px; }
            .device-row { min-height: 260px; }
            .faq-layout { gap: 30px; }
            .cta-inner { align-items: flex-start; flex-direction: column; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px 25px; }
            .footer-grid > div:last-child { grid-column: auto; }
        }
        @media (max-width: 520px) {
            .container { width: min(100% - 30px, var(--container)); }
            h1 { font-size: 37px; }
            .hero-copy { font-size: 15px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .btn-primary, .btn-secondary { width: 100%; }
            .hero-note { gap: 14px; flex-wrap: wrap; }
            .hero-art { min-height: 320px; border-radius: 28px; }
            .stadium-core { width: 140px; height: 140px; }
            .visual-card { width: 135px; padding: 12px; }
            .visual-card.one { left: 5%; top: 11%; }
            .visual-card.two { right: 4%; bottom: 9%; }
            .section-head { display: block; }
            .section-intro { margin-top: 15px; }
            .feature-card { min-height: 340px; padding: 25px; }
            .feature-card h3 { font-size: 23px; }
            .feature-link { left: 25px; bottom: 24px; }
            .update-item { grid-template-columns: 1fr auto; gap: 5px 12px; }
            .update-date { grid-column: 1 / -1; }
            .update-excerpt { grid-column: 1 / -1; }
            .category-item { grid-template-columns: 42px 1fr auto; padding: 20px 17px; gap: 10px; }
            .category-item h3 { font-size: 16px; }
            .app-panel h2 { font-size: 29px; }
            .device { width: 102px; height: 193px; }
            .device.main { height: 225px; }
            .device-screen { padding: 13px 8px; }
            .cta-inner { padding: 26px 22px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 8px; }
        }

/* roulang page: article */
:root {
            --bg: #15131d;
            --bg-deep: #0e0d14;
            --surface: #211e2d;
            --surface-2: #29243a;
            --surface-3: #302a45;
            --text: #f4f1f8;
            --muted: #b4adbf;
            --dim: #81798d;
            --line: rgba(231, 224, 244, .13);
            --green: #b8f36a;
            --green-deep: #8acb3e;
            --purple: #a77bff;
            --orange: #f4a36b;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .28);
            --container: 1180px;
        }

        * { box-sizing: border-box; }

        html {
            scroll-behavior: smooth;
            background: var(--bg-deep);
        }

        body {
            margin: 0;
            min-width: 320px;
            overflow-x: hidden;
            color: var(--text);
            background:
                radial-gradient(circle at 82% 8%, rgba(167,123,255,.11), transparent 28rem),
                radial-gradient(circle at 7% 45%, rgba(184,243,106,.055), transparent 25rem),
                var(--bg);
            font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .16;
            background-image: radial-gradient(rgba(255,255,255,.7) .7px, transparent .8px);
            background-size: 37px 37px;
            mask-image: linear-gradient(to bottom, black, transparent 72%);
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(184,243,106,.55);
            outline-offset: 4px;
        }

        img {
            display: block;
            max-width: 100%;
        }

        button,
        input {
            font: inherit;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: min(var(--container), calc(100% - 48px));
            margin: 0 auto;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(14,13,20,.94);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(16px);
        }

        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 34px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 285px;
            color: var(--text);
            font-weight: 800;
            letter-spacing: -.03em;
            line-height: 1.18;
        }

        .brand:hover { color: var(--text); }

        .brand-mark {
            width: 37px;
            height: 37px;
            position: relative;
            flex: 0 0 auto;
            border: 2px solid var(--green);
            border-radius: 50%;
            transform: rotate(-22deg);
        }

        .brand-mark::before,
        .brand-mark::after {
            content: "";
            position: absolute;
            border: 1px solid var(--purple);
            border-radius: 50%;
            inset: 6px -5px;
        }

        .brand-mark::after {
            inset: -5px 6px;
            border-color: var(--orange);
        }

        .brand-name {
            font-size: 17px;
        }

        .brand-name span {
            display: block;
            margin-top: 2px;
            color: var(--green);
            font-size: 12px;
            font-weight: 600;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
        }

        .main-nav a {
            position: relative;
            padding: 26px 0 24px;
            color: var(--muted);
            font-size: 14px;
            white-space: nowrap;
            transition: color .25s ease;
        }

        .main-nav a:hover,
        .main-nav a.active {
            color: var(--green);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            right: 0;
            bottom: 16px;
            left: 0;
            height: 2px;
            background: var(--green);
        }

        .nav-action,
        .btn-primary {
            border: 0;
            border-radius: 10px;
            background: var(--green);
            color: #171b11;
            font-weight: 800;
            transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
        }

        .nav-action {
            padding: 11px 17px;
            font-size: 13px;
            white-space: nowrap;
        }

        .nav-action:hover,
        .btn-primary:hover {
            background: #d0ff91;
            color: #171b11;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(184,243,106,.16);
        }

        .menu-toggle {
            display: none;
            border: 1px solid var(--line);
            border-radius: 8px;
            padding: 7px 10px;
            background: transparent;
            color: var(--text);
        }

        .article-hero {
            position: relative;
            padding: 74px 0 62px;
            border-bottom: 1px solid var(--line);
        }

        .article-hero::after {
            content: "";
            position: absolute;
            top: 48px;
            right: -110px;
            width: 340px;
            height: 340px;
            border: 1px solid rgba(167,123,255,.19);
            border-radius: 50%;
            transform: rotate(-24deg);
            pointer-events: none;
        }

        .breadcrumb-line {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 9px;
            margin-bottom: 28px;
            color: var(--dim);
            font-size: 13px;
        }

        .breadcrumb-line a {
            transition: color .2s ease;
        }

        .breadcrumb-line a:hover {
            color: var(--green);
        }

        .breadcrumb-line .current {
            max-width: 520px;
            overflow: hidden;
            color: var(--muted);
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .breadcrumb-separator {
            color: var(--purple);
        }

        .article-heading {
            max-width: 900px;
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 17px;
            padding: 7px 12px;
            border: 1px solid rgba(184,243,106,.3);
            border-radius: 999px;
            background: rgba(184,243,106,.08);
            color: var(--green);
            font-size: 12px;
            font-weight: 800;
        }

        .article-category::before {
            content: "";
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--green);
            box-shadow: 0 0 0 4px rgba(184,243,106,.1);
        }

        h1,
        h2,
        h3,
        p {
            margin-top: 0;
        }

        .article-heading h1 {
            max-width: 860px;
            margin-bottom: 21px;
            color: var(--text);
            font-size: clamp(34px, 5vw, 64px);
            font-weight: 850;
            letter-spacing: -.055em;
            line-height: 1.16;
        }

        .article-summary {
            max-width: 800px;
            margin-bottom: 25px;
            color: var(--muted);
            font-size: 18px;
            line-height: 1.9;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px 28px;
            color: var(--dim);
            font-size: 13px;
        }

        .article-meta strong {
            margin-right: 6px;
            color: var(--muted);
            font-weight: 600;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 286px;
            gap: 60px;
            align-items: start;
            padding: 68px 0 86px;
        }

        .article-content {
            min-width: 0;
            max-width: 790px;
            color: #d6d0df;
            font-size: 17px;
            line-height: 2;
        }

        .article-content > *:first-child {
            margin-top: 0;
        }

        .article-content h2 {
            position: relative;
            margin: 45px 0 17px;
            padding-left: 18px;
            color: var(--text);
            font-size: 28px;
            font-weight: 800;
            line-height: 1.35;
        }

        .article-content h2::before {
            content: "";
            position: absolute;
            top: 5px;
            bottom: 5px;
            left: 0;
            width: 4px;
            border-radius: 3px;
            background: var(--green);
        }

        .article-content h3 {
            margin: 32px 0 12px;
            color: #ece7f4;
            font-size: 21px;
            font-weight: 750;
            line-height: 1.45;
        }

        .article-content p {
            margin-bottom: 22px;
        }

        .article-content a {
            color: var(--green);
            text-decoration: underline;
            text-decoration-color: rgba(184,243,106,.45);
            text-underline-offset: 4px;
        }

        .article-content a:hover {
            color: #dcffaf;
        }

        .article-content ul,
        .article-content ol {
            margin: 20px 0 27px;
            padding-left: 26px;
        }

        .article-content li {
            margin: 9px 0;
            padding-left: 5px;
        }

        .article-content li::marker {
            color: var(--green);
        }

        .article-content blockquote {
            margin: 30px 0;
            padding: 23px 26px;
            border-left: 3px solid var(--purple);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            background: var(--surface);
            color: #e4dafa;
        }

        .article-content img {
            width: 100%;
            height: auto;
            margin: 30px 0;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow);
        }

        .article-content figure {
            margin: 32px 0;
        }

        .article-content figcaption {
            margin-top: -19px;
            color: var(--dim);
            font-size: 13px;
            text-align: center;
        }

        .article-content table {
            width: 100%;
            margin: 28px 0;
            overflow: hidden;
            border-collapse: collapse;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: var(--surface);
        }

        .article-content th,
        .article-content td {
            padding: 13px 15px;
            border-bottom: 1px solid var(--line);
            text-align: left;
        }

        .article-content th {
            color: var(--green);
            background: var(--surface-2);
            font-weight: 700;
        }

        .article-content tr:last-child td {
            border-bottom: 0;
        }

        .article-aside {
            position: sticky;
            top: 108px;
        }

        .aside-card {
            margin-bottom: 18px;
            padding: 23px;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: var(--surface);
        }

        .aside-card.accent {
            border-color: rgba(167,123,255,.35);
            background:
                linear-gradient(145deg, rgba(167,123,255,.14), transparent 65%),
                var(--surface);
        }

        .aside-label {
            margin-bottom: 15px;
            color: var(--green);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .1em;
        }

        .aside-card h3 {
            margin-bottom: 9px;
            color: var(--text);
            font-size: 19px;
            line-height: 1.45;
        }

        .aside-card p {
            margin-bottom: 17px;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.8;
        }

        .aside-links {
            display: grid;
            gap: 3px;
        }

        .aside-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 9px 0;
            border-bottom: 1px solid rgba(231,224,244,.08);
            color: var(--muted);
            font-size: 14px;
            transition: color .2s ease, padding .2s ease;
        }

        .aside-links a:last-child {
            border-bottom: 0;
        }

        .aside-links a::after {
            content: "↗";
            color: var(--purple);
        }

        .aside-links a:hover {
            padding-left: 5px;
            color: var(--green);
        }

        .mini-button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 42px;
            padding: 0 15px;
            border: 1px solid rgba(184,243,106,.4);
            border-radius: 9px;
            background: rgba(184,243,106,.08);
            color: var(--green);
            font-size: 13px;
            font-weight: 800;
            transition: .25s ease;
        }

        .mini-button:hover {
            border-color: var(--green);
            background: var(--green);
            color: #171b11;
            transform: translateY(-2px);
        }

        .article-bottom {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--line);
        }

        .article-bottom-title {
            margin-bottom: 14px;
            color: var(--text);
            font-size: 18px;
            font-weight: 800;
        }

        .article-bottom-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .related-section {
            padding: 0 0 84px;
        }

        .section-head {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 25px;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            margin-bottom: 9px;
            color: var(--green);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
        }

        .section-kicker::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--green);
        }

        .section-head h2 {
            margin: 0;
            color: var(--text);
            font-size: 30px;
            line-height: 1.3;
        }

        .related-empty {
            padding: 28px;
            border: 1px dashed rgba(231,224,244,.2);
            border-radius: var(--radius-md);
            background: rgba(33,30,45,.5);
            color: var(--muted);
        }

        .cta-band {
            position: relative;
            overflow: hidden;
            padding: 48px 0;
            background:
                radial-gradient(circle at 86% 20%, rgba(184,243,106,.16), transparent 17rem),
                linear-gradient(135deg, #26213a, #1c1a29);
            border-top: 1px solid rgba(167,123,255,.27);
            border-bottom: 1px solid rgba(167,123,255,.27);
        }

        .cta-band::before {
            content: "";
            position: absolute;
            right: 9%;
            bottom: -130px;
            width: 280px;
            height: 280px;
            border: 1px solid rgba(184,243,106,.22);
            border-radius: 50%;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
        }

        .cta-inner h2 {
            margin-bottom: 8px;
            color: var(--text);
            font-size: 28px;
            line-height: 1.35;
        }

        .cta-inner p {
            margin-bottom: 0;
            color: var(--muted);
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            flex: 0 0 auto;
        }

        .site-footer {
            padding: 58px 0 22px;
            background: var(--bg-deep);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.45fr .8fr .9fr 1fr;
            gap: 40px;
            padding-bottom: 42px;
        }

        .footer-brand .brand {
            min-width: 0;
            margin-bottom: 18px;
        }

        .footer-brand p,
        .footer-note {
            max-width: 330px;
            margin-bottom: 0;
            color: var(--dim);
            font-size: 13px;
            line-height: 1.85;
        }

        .footer-title {
            margin-bottom: 14px;
            color: var(--text);
            font-size: 14px;
            font-weight: 800;
        }

        .footer-links {
            display: grid;
            gap: 8px;
        }

        .footer-links a {
            width: fit-content;
            color: var(--dim);
            font-size: 13px;
            transition: color .2s ease, transform .2s ease;
        }

        .footer-links a:hover {
            color: var(--green);
            transform: translateX(3px);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 21px;
            border-top: 1px solid var(--line);
            color: var(--dim);
            font-size: 12px;
        }

        .footer-bottom a:hover {
            color: var(--green);
        }

        .not-found {
            padding: 90px 0 120px;
        }

        .not-found-card {
            max-width: 680px;
            margin: 0 auto;
            padding: 52px 35px;
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            background: var(--surface);
            text-align: center;
            box-shadow: var(--shadow);
        }

        .not-found-icon {
            width: 58px;
            height: 58px;
            display: grid;
            place-items: center;
            margin: 0 auto 20px;
            border: 1px solid rgba(184,243,106,.35);
            border-radius: 50%;
            color: var(--green);
            font-size: 25px;
        }

        .not-found-card h1 {
            margin-bottom: 12px;
            color: var(--text);
            font-size: 32px;
        }

        .not-found-card p {
            margin-bottom: 25px;
            color: var(--muted);
        }

        @media (max-width: 1080px) {
            .nav-wrap { gap: 20px; }
            .brand { min-width: 245px; }
            .main-nav { gap: 16px; }
            .article-layout { gap: 35px; }
            .footer-grid { gap: 25px; }
        }

        @media (max-width: 860px) {
            .nav-wrap {
                min-height: 72px;
                justify-content: space-between;
            }

            .brand {
                min-width: 0;
            }

            .main-nav {
                position: absolute;
                top: calc(100% + 1px);
                right: 24px;
                left: 24px;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 10px 18px 16px;
                border: 1px solid var(--line);
                border-top: 0;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                background: rgba(14,13,20,.98);
                box-shadow: var(--shadow);
            }

            .main-nav.is-open {
                display: flex;
            }

            .main-nav a {
                padding: 13px 0;
                border-bottom: 1px solid rgba(231,224,244,.08);
            }

            .main-nav a:last-child {
                border-bottom: 0;
            }

            .main-nav a.active::after {
                right: auto;
                bottom: 9px;
                width: 28px;
            }

            .nav-action {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-aside {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }

            .aside-card {
                margin-bottom: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 620px) {
            .container {
                width: min(100% - 32px, var(--container));
            }

            .article-hero {
                padding: 48px 0 42px;
            }

            .article-heading h1 {
                font-size: 35px;
            }

            .article-summary {
                font-size: 16px;
            }

            .article-layout {
                padding: 45px 0 62px;
            }

            .article-content {
                font-size: 16px;
                line-height: 1.9;
            }

            .article-content h2 {
                font-size: 24px;
            }

            .article-aside {
                display: block;
            }

            .aside-card {
                margin-bottom: 16px;
            }

            .section-head,
            .cta-inner {
                display: block;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .cta-inner h2 {
                font-size: 25px;
            }

            .cta-actions {
                margin-top: 23px;
            }

            .btn-primary,
            .btn-secondary {
                min-height: 46px;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                display: block;
                line-height: 2;
            }

            .footer-bottom span {
                display: block;
            }

            .footer-bottom span + span {
                margin-top: 6px;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #15131d;
            --bg-deep: #0e0d14;
            --surface: #211e2d;
            --surface-2: #29243a;
            --surface-3: #302a45;
            --text: #f4f1f8;
            --muted: #b4adbf;
            --dim: #81798d;
            --line: rgba(231,224,244,.13);
            --green: #b8f36a;
            --green-deep: #8acb3e;
            --purple: #a77bff;
            --orange: #f4a36b;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --shadow: 0 22px 70px rgba(0,0,0,.28);
            --container: 1180px;
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            background:
                radial-gradient(circle at 86% 8%, rgba(167,123,255,.12), transparent 28rem),
                radial-gradient(circle at 4% 45%, rgba(184,243,106,.06), transparent 24rem),
                var(--bg);
            color: var(--text);
            font-family: "Noto Sans SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            opacity: .15;
            background-image: radial-gradient(rgba(255,255,255,.7) .7px,transparent .8px);
            background-size: 37px 37px;
            mask-image: linear-gradient(to bottom,#000,transparent 74%);
        }
        a { color: inherit; text-decoration: none; }
        img { max-width: 100%; display: block; }
        button,input { font: inherit; }
        button { cursor: pointer; }
        .container { width: min(var(--container),calc(100% - 48px)); margin: 0 auto; }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(14,13,20,.95);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(16px);
        }
        .nav-wrap { min-height: 78px; display: flex; align-items: center; gap: 34px; }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 285px;
            font-weight: 800;
            letter-spacing: -.03em;
            line-height: 1.18;
        }
        .brand-mark {
            width: 37px; height: 37px; position: relative; flex: 0 0 auto;
            border: 2px solid var(--green); border-radius: 50%; transform: rotate(-22deg);
        }
        .brand-mark::before,.brand-mark::after {
            content: ""; position: absolute; border: 1px solid var(--purple);
            border-radius: 50%; inset: 6px -5px;
        }
        .brand-mark::after { inset: -5px 6px; border-color: var(--orange); }
        .brand-name { font-size: 17px; }
        .brand-name span { display: block; color: var(--green); font-size: 12px; font-weight: 600; margin-top: 2px; }
        .main-nav { display: flex; align-items: center; gap: 24px; flex: 1; }
        .main-nav a {
            position: relative; padding: 26px 0 24px; color: var(--muted);
            font-size: 14px; white-space: nowrap; transition: color .25s ease;
        }
        .main-nav a:hover,.main-nav a.active { color: var(--green); }
        .main-nav a.active::after {
            content: ""; position: absolute; left: 0; right: 0; bottom: 16px;
            height: 2px; background: var(--green);
        }
        .nav-action,.btn-primary {
            background: var(--green); color: #171b11; font-weight: 800;
            border: 0; border-radius: 10px; transition: transform .25s,background .25s,box-shadow .25s;
        }
        .nav-action { padding: 11px 17px; font-size: 13px; white-space: nowrap; }
        .nav-action:hover,.btn-primary:hover { background: #d0ff91; transform: translateY(-2px); box-shadow: 0 10px 25px rgba(184,243,106,.16); }
        .menu-toggle { display: none; background: transparent; border: 1px solid var(--line); color: var(--text); border-radius: 8px; padding: 7px 10px; }
        .page-hero { padding: 82px 0 70px; position: relative; }
        .hero-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
        .eyebrow,.section-kicker {
            display: inline-flex; align-items: center; gap: 9px; color: var(--green);
            font-size: 12px; font-weight: 800; letter-spacing: .12em;
        }
        .eyebrow::before,.section-kicker::before { content: ""; width: 24px; height: 2px; background: var(--green); }
        h1,h2,h3,p { margin-top: 0; }
        h1 { font-size: clamp(38px,5vw,66px); line-height: 1.13; letter-spacing: -.055em; margin: 18px 0 22px; max-width: 720px; }
        h1 em { color: var(--green); font-style: normal; }
        h2 { font-size: clamp(28px,3vw,42px); line-height: 1.25; letter-spacing: -.04em; margin: 13px 0 17px; }
        h3 { font-size: 20px; line-height: 1.4; margin-bottom: 10px; }
        .lead { max-width: 650px; color: var(--muted); font-size: 17px; line-height: 1.9; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 30px; }
        .btn-primary,.btn-secondary { min-height: 48px; padding: 0 21px; display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; font-size: 14px; font-weight: 800; }
        .btn-secondary { border: 1px solid rgba(167,123,255,.55); color: #e4d9ff; background: rgba(167,123,255,.08); transition: .25s ease; }
        .btn-secondary:hover { background: rgba(167,123,255,.18); border-color: var(--purple); transform: translateY(-2px); }
        .hero-note { display: flex; gap: 27px; margin-top: 34px; color: var(--dim); font-size: 12px; }
        .hero-note strong { color: var(--text); font-size: 14px; display: block; }
        .event-visual {
            min-height: 370px; position: relative; overflow: hidden; border: 1px solid var(--line);
            border-radius: 38px 18px 38px 18px; background: var(--surface); box-shadow: var(--shadow);
        }
        .event-visual::before {
            content: ""; position: absolute; width: 420px; height: 420px; border: 1px solid rgba(167,123,255,.32);
            border-radius: 50%; top: -105px; right: -90px; box-shadow: 0 0 0 35px rgba(167,123,255,.04),0 0 0 70px rgba(167,123,255,.025);
        }
        .event-visual::after {
            content: ""; position: absolute; left: -80px; bottom: 44px; width: 520px; height: 1px;
            background: linear-gradient(90deg,transparent,var(--green),transparent); transform: rotate(-21deg);
        }
        .visual-label { position: absolute; top: 28px; left: 30px; color: var(--muted); font-size: 12px; letter-spacing: .12em; }
        .visual-core { position: absolute; top: 100px; left: 50%; transform: translateX(-50%); width: 148px; height: 148px; border: 2px solid var(--green); border-radius: 50%; }
        .visual-core::before { content: ""; position: absolute; inset: 22px; border: 1px solid var(--purple); border-radius: 50%; }
        .visual-core::after { content: ""; position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--orange); top: 14px; right: 22px; box-shadow: 0 0 0 7px rgba(244,163,107,.12); }
        .visual-caption { position: absolute; left: 30px; bottom: 28px; }
        .visual-caption strong { display: block; font-size: 24px; }
        .visual-caption span { color: var(--muted); font-size: 13px; }
        .status-chip { position: absolute; right: 27px; bottom: 30px; border: 1px solid rgba(184,243,106,.35); color: var(--green); padding: 7px 12px; border-radius: 30px; font-size: 12px; }
        .section { padding: 82px 0; }
        .section-head { display: flex; justify-content: space-between; align-items: end; gap: 25px; margin-bottom: 30px; }
        .section-head p { color: var(--muted); max-width: 520px; margin-bottom: 0; }
        .topic-strip { display: flex; gap: 12px; overflow-x: auto; padding-bottom: 8px; scrollbar-width: thin; }
        .topic-strip a { min-width: 145px; padding: 15px 17px; border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius-sm); transition: .25s ease; }
        .topic-strip a:hover,.topic-strip a.current { border-color: var(--purple); background: var(--surface-2); transform: translateY(-3px); }
        .topic-strip b { display: block; color: var(--purple); font-size: 12px; margin-bottom: 4px; }
        .topic-strip span { font-weight: 700; font-size: 14px; }
        .feature-band { display: grid; grid-template-columns: 1.25fr .75fr; gap: 18px; }
        .feature-card,.side-card,.timeline-item,.faq-item,.app-panel,.info-card {
            background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-md);
        }
        .feature-card { min-height: 315px; padding: 31px; position: relative; overflow: hidden; }
        .feature-card::after { content: ""; position: absolute; right: -50px; bottom: -90px; width: 250px; height: 250px; border: 1px solid rgba(184,243,106,.35); border-radius: 50%; }
        .feature-card .tag,.side-card .tag { color: var(--green); font-size: 12px; font-weight: 700; }
        .feature-card h3 { font-size: 30px; max-width: 530px; margin-top: 38px; }
        .feature-card p { color: var(--muted); max-width: 540px; }
        .inline-link { color: var(--green); font-weight: 800; font-size: 14px; }
        .side-stack { display: grid; gap: 18px; }
        .side-card { padding: 23px; transition: .25s ease; }
        .side-card:hover,.timeline-item:hover,.info-card:hover { border-color: rgba(184,243,106,.45); transform: translateY(-3px); }
        .side-card h3 { font-size: 18px; margin: 13px 0 8px; }
        .side-card p { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
        .timeline { border-left: 1px solid rgba(167,123,255,.42); margin-left: 18px; padding-left: 27px; }
        .timeline-item { position: relative; padding: 22px 25px; margin-bottom: 14px; transition: .25s ease; }
        .timeline-item::before { content: ""; position: absolute; width: 11px; height: 11px; border-radius: 50%; background: var(--purple); border: 3px solid var(--bg); left: -34px; top: 28px; }
        .timeline-meta { display: flex; gap: 15px; align-items: center; color: var(--dim); font-size: 12px; margin-bottom: 6px; }
        .timeline-meta b { color: var(--orange); font-weight: 700; }
        .timeline-item h3 { margin: 3px 0 5px; font-size: 18px; }
        .timeline-item p { color: var(--muted); font-size: 14px; margin-bottom: 7px; }
        .split-section { display: grid; grid-template-columns: .85fr 1.15fr; gap: 50px; align-items: start; }
        .info-card { padding: 25px; margin-bottom: 13px; display: grid; grid-template-columns: 60px 1fr; gap: 17px; align-items: start; }
        .info-number { color: var(--green); font-size: 24px; font-weight: 800; line-height: 1.2; }
        .info-card h3 { font-size: 18px; margin-bottom: 5px; }
        .info-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
        .app-panel { padding: 42px 48px; background: linear-gradient(125deg,#28223c,#211e2d 62%,#302547); position: relative; overflow: hidden; }
        .app-panel::after { content: ""; position: absolute; width: 330px; height: 330px; border: 1px solid rgba(184,243,106,.22); border-radius: 50%; right: -105px; top: -115px; }
        .app-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 35px; align-items: center; position: relative; z-index: 1; }
        .app-panel p { color: var(--muted); max-width: 570px; }
        .device-row { display: flex; justify-content: center; gap: 12px; align-items: end; }
        .device { width: 105px; height: 190px; border: 5px solid #121019; border-radius: 20px; background: var(--surface-3); box-shadow: 0 15px 30px rgba(0,0,0,.28); padding: 17px 10px; }
        .device:first-child { height: 157px; transform: rotate(-8deg); }
        .device:last-child { height: 173px; transform: rotate(8deg); }
        .device-line { height: 7px; border-radius: 5px; background: var(--purple); margin-bottom: 9px; opacity: .8; }
        .device-line.short { width: 57%; background: var(--green); }
        .device-score { margin-top: 25px; height: 35px; background: rgba(184,243,106,.12); border-left: 3px solid var(--green); }
        .faq-list { border-top: 1px solid var(--line); }
        .faq-item { margin-top: 12px; overflow: hidden; }
        .faq-question { width: 100%; display: flex; justify-content: space-between; gap: 20px; align-items: center; background: transparent; border: 0; color: var(--text); text-align: left; padding: 21px 24px; font-weight: 700; }
        .faq-question span:last-child { color: var(--green); font-size: 22px; transition: transform .25s; }
        .faq-answer { display: none; color: var(--muted); padding: 0 24px 22px; font-size: 14px; }
        .faq-item.open { border-color: rgba(184,243,106,.4); }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
        .cta { margin: 15px 0 85px; padding: 45px 50px; border-radius: var(--radius-lg); background: var(--green); color: #151b11; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
        .cta h2 { margin-bottom: 8px; }
        .cta p { margin-bottom: 0; color: #40522c; }
        .cta .btn-secondary { color: #172013; border-color: rgba(23,32,19,.4); background: rgba(255,255,255,.15); }
        .cta .btn-secondary:hover { background: rgba(255,255,255,.35); }
        .site-footer { background: var(--bg-deep); border-top: 1px solid var(--line); padding: 61px 0 23px; }
        .footer-grid { display: grid; grid-template-columns: 1.5fr .8fr .9fr 1fr; gap: 38px; padding-bottom: 45px; }
        .footer-brand .brand { min-width: 0; margin-bottom: 19px; }
        .footer-brand p,.footer-note { color: var(--dim); font-size: 13px; line-height: 1.8; }
        .footer-title { color: var(--text); font-weight: 800; margin-bottom: 15px; font-size: 14px; }
        .footer-links { display: grid; gap: 9px; color: var(--muted); font-size: 13px; }
        .footer-links a:hover,.footer-bottom a:hover { color: var(--green); }
        .footer-bottom { border-top: 1px solid var(--line); padding-top: 19px; display: flex; justify-content: space-between; gap: 20px; color: var(--dim); font-size: 12px; }
        .breadcrumb { color: var(--dim); font-size: 13px; margin-bottom: 22px; }
        .breadcrumb a:hover { color: var(--green); }
        :focus-visible { outline: 2px solid var(--green); outline-offset: 3px; }
        @media (max-width: 1024px) {
            .nav-wrap { gap: 18px; }
            .brand { min-width: 0; }
            .main-nav { gap: 16px; }
            .main-nav a { font-size: 13px; }
            .hero-layout { gap: 38px; }
            .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
            .footer-grid > :last-child { grid-column: 1 / -1; max-width: 480px; }
        }
        @media (max-width: 768px) {
            .container { width: min(var(--container),calc(100% - 32px)); }
            .nav-wrap { min-height: 68px; justify-content: space-between; }
            .brand { min-width: 0; }
            .brand-name { font-size: 15px; }
            .brand-name span { font-size: 11px; }
            .brand-mark { width: 32px; height: 32px; }
            .main-nav {
                display: none;
                position: absolute;
                left: 16px;
                right: 16px;
                top: 74px;
                padding: 12px 18px 17px;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: var(--bg-deep);
                border: 1px solid var(--line);
                border-radius: var(--radius-md);
                box-shadow: var(--shadow);
            }
            .main-nav.show { display: flex; }
            .main-nav a { padding: 12px 2px; }
            .main-nav a.active::after { left: -2px; right: auto; bottom: 8px; width: 22px; }
            .nav-action { display: none; }
            .menu-toggle { display: block; }
            .page-hero { padding: 58px 0 48px; }
            .hero-layout,.feature-band,.split-section,.app-grid { grid-template-columns: 1fr; }
            .hero-layout { gap: 34px; }
            .event-visual { min-height: 300px; }
            .section { padding: 58px 0; }
            .section-head { display: block; }
            .section-head p { margin-top: 13px; }
            .feature-card h3 { font-size: 25px; }
            .app-panel { padding: 34px 25px; }
            .cta { display: block; padding: 34px 27px; margin-bottom: 58px; }
            .cta .hero-actions { margin-top: 23px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 22px; }
            .footer-grid > :last-child { grid-column: auto; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-bottom: 7px; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 38px; }
            h2 { font-size: 29px; }
            .hero-copy,.lead { font-size: 15px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .btn-primary,.btn-secondary { width: 100%; }
            .hero-note { gap: 16px; flex-wrap: wrap; }
            .event-visual { min-height: 270px; border-radius: 27px 14px 27px 14px; }
            .visual-core { width: 115px; height: 115px; top: 77px; }
            .visual-caption { left: 22px; bottom: 22px; }
            .visual-caption strong { font-size: 19px; }
            .status-chip { right: 18px; bottom: 21px; }
            .feature-card { padding: 24px; min-height: 280px; }
            .feature-card h3 { margin-top: 27px; font-size: 22px; }
            .side-card { padding: 20px; }
            .timeline { margin-left: 10px; padding-left: 22px; }
            .timeline-item { padding: 19px; }
            .timeline-item::before { left: -29px; }
            .info-card { grid-template-columns: 44px 1fr; padding: 20px; }
            .device-row { transform: scale(.86); margin: -10px -25px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-grid > :last-child { grid-column: auto; }
        }

/* roulang page: category1 */
:root{
      --bg:#15131d;--bg-deep:#0e0d14;--surface:#211e2d;--surface-2:#29243a;--surface-3:#302a45;
      --text:#f4f1f8;--muted:#b4adbf;--dim:#81798d;--line:rgba(231,224,244,.13);
      --green:#b8f36a;--green-deep:#8acb3e;--purple:#a77bff;--orange:#f4a36b;
      --radius-lg:28px;--radius-md:18px;--radius-sm:10px;--shadow:0 22px 70px rgba(0,0,0,.28);--container:1180px
    }
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 82% 8%,rgba(167,123,255,.12),transparent 28rem),radial-gradient(circle at 5% 38%,rgba(184,243,106,.06),transparent 25rem),var(--bg);color:var(--text);font-family:"Noto Sans SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
    body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.14;background-image:radial-gradient(rgba(255,255,255,.7) .7px,transparent .8px);background-size:37px 37px;mask-image:linear-gradient(#000,transparent 72%)}
    a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}button{cursor:pointer}.container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(14,13,20,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}
    .nav-wrap{min-height:78px;display:flex;align-items:center;gap:30px}.brand{display:inline-flex;align-items:center;gap:11px;min-width:285px;font-weight:800;letter-spacing:-.03em;line-height:1.18}.brand-mark{width:37px;height:37px;position:relative;flex:0 0 auto;border:2px solid var(--green);border-radius:50%;transform:rotate(-22deg)}.brand-mark:before,.brand-mark:after{content:"";position:absolute;border:1px solid var(--purple);border-radius:50%;inset:6px -5px}.brand-mark:after{inset:-5px 6px;border-color:var(--orange)}.brand-name{font-size:17px}.brand-name span{display:block;color:var(--green);font-size:12px;font-weight:600;margin-top:2px}
    .main-nav{display:flex;align-items:center;gap:24px;flex:1}.main-nav a{position:relative;padding:26px 0 24px;color:var(--muted);font-size:14px;white-space:nowrap;transition:color .25s}.main-nav a:hover,.main-nav a.active{color:var(--green)}.main-nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;background:var(--green)}
    .nav-action,.btn-primary{background:var(--green);color:#171b11;font-weight:800;border:0;border-radius:10px;transition:.25s}.nav-action{padding:11px 17px;font-size:13px;white-space:nowrap}.nav-action:hover,.btn-primary:hover{background:#d0ff91;transform:translateY(-2px);box-shadow:0 10px 25px rgba(184,243,106,.16)}.menu-toggle{display:none;background:transparent;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:7px 10px}
    .page-hero{padding:74px 0 62px;position:relative}.hero-layout{display:grid;grid-template-columns:1.08fr .92fr;gap:70px;align-items:center}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:9px;color:var(--green);font-size:12px;font-weight:800;letter-spacing:.12em}.eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--green)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.14;letter-spacing:-.06em;margin:18px 0 20px;max-width:700px}h1 em{font-style:normal;color:var(--green)}h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.04em;margin:10px 0 15px}h3{font-size:20px;line-height:1.4;margin:10px 0}.lead{font-size:17px;color:var(--muted);max-width:650px;line-height:1.9}.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:28px}.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:10px;font-size:14px;font-weight:800}.btn-secondary{border:1px solid rgba(167,123,255,.55);color:#e4d9ff;background:rgba(167,123,255,.08);transition:.25s}.btn-secondary:hover{background:rgba(167,123,255,.18);border-color:var(--purple);transform:translateY(-2px)}
    .hero-visual{min-height:350px;border:1px solid var(--line);border-radius:34px;background:linear-gradient(145deg,var(--surface-2),#191622);position:relative;overflow:hidden;padding:28px;box-shadow:var(--shadow)}.hero-visual:before{content:"";position:absolute;width:360px;height:360px;border:1px solid rgba(184,243,106,.3);border-radius:50%;right:-80px;top:-65px}.hero-visual:after{content:"";position:absolute;width:500px;height:150px;border-top:1px solid rgba(167,123,255,.6);transform:rotate(-27deg);right:-150px;top:100px}
    .visual-caption{position:relative;z-index:1;color:var(--dim);font-size:12px;letter-spacing:.12em}.orbit-card{position:absolute;z-index:2;left:28px;right:28px;bottom:28px;padding:22px;background:rgba(14,13,20,.82);border:1px solid var(--line);border-left:3px solid var(--green);border-radius:var(--radius-md)}.orbit-card strong{display:block;font-size:25px;line-height:1.35}.orbit-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:13px;color:var(--muted);font-size:12px}.badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:6px;color:var(--green);background:rgba(184,243,106,.1);border:1px solid rgba(184,243,106,.25);font-size:12px}.badge.purple{color:#d8c7ff;background:rgba(167,123,255,.12);border-color:rgba(167,123,255,.3)}
    .section{padding:78px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}.section-head p{max-width:470px;color:var(--muted);margin:0}.content-map{display:grid;grid-template-columns:1.15fr .85fr;gap:20px}.feature-card,.info-card,.topic-panel,.app-panel,.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md)}.feature-card{min-height:330px;padding:34px;position:relative;overflow:hidden;background:linear-gradient(140deg,#29243a,#211e2d)}.feature-card:after{content:"01";position:absolute;right:24px;bottom:-12px;font-size:130px;font-weight:900;color:rgba(167,123,255,.09);line-height:1}.feature-card p,.info-card p,.topic-panel p{color:var(--muted);margin:8px 0 20px}.side-stack{display:grid;gap:20px}.info-card{padding:25px;border-left:3px solid var(--purple);transition:.25s}.info-card:hover,.feature-card:hover,.topic-panel:hover{transform:translateY(-4px);border-color:rgba(184,243,106,.45);box-shadow:var(--shadow)}
    .topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.topic-panel{padding:22px;min-height:180px;transition:.25s}.topic-number{color:var(--purple);font-size:13px;font-weight:800;letter-spacing:.12em}.topic-panel p{font-size:14px;line-height:1.7;margin-bottom:0}
    .timeline{border-top:1px solid var(--line)}.timeline-item{display:grid;grid-template-columns:110px 1fr auto;gap:24px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:.2s}.timeline-item:hover{padding-left:10px;background:rgba(167,123,255,.04)}.date{font-size:13px;color:var(--green);font-weight:700}.timeline-item h3{margin:0;font-size:18px}.timeline-item p{margin:4px 0 0;color:var(--muted);font-size:14px}.arrow{color:var(--purple);font-size:22px}
    .app-panel{display:grid;grid-template-columns:1fr .85fr;gap:35px;align-items:center;padding:42px;background:linear-gradient(120deg,#30264a,#211e2d);overflow:hidden}.app-panel p{color:var(--muted);max-width:520px}.device-row{display:flex;justify-content:center;gap:14px;align-items:end}.device{width:112px;height:190px;border:4px solid #0e0d14;border-radius:20px;background:linear-gradient(160deg,#b8f36a,#8d62e9);padding:10px;box-shadow:0 18px 35px rgba(0,0,0,.3)}.device:nth-child(2){height:220px;background:linear-gradient(160deg,#a77bff,#f4a36b)}.device-screen{height:100%;border-radius:12px;background:#171522;padding:12px;color:var(--green);font-size:11px}.device-screen i{display:block;height:7px;background:var(--purple);margin:22px 0 9px;border-radius:4px}.app-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .faq-list{max-width:850px}.faq-item{margin-bottom:12px;overflow:hidden}.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;background:none;color:var(--text);border:0;padding:20px 24px;font-weight:800}.faq-question span:last-child{color:var(--green);font-size:22px}.faq-answer{display:none;color:var(--muted);padding:0 24px 22px}.faq-item.open{border-left:3px solid var(--green)}.faq-item.open .faq-answer{display:block}
    .cta{padding:38px 0}.cta-box{display:flex;justify-content:space-between;align-items:center;gap:25px;padding:34px 38px;border-radius:var(--radius-lg);background:var(--green);color:#171b11}.cta-box h2{margin:0;font-size:30px}.cta-box p{margin:5px 0 0;color:#465333}.cta-box .btn-secondary{border-color:#465333;color:#273218;background:transparent}
    .site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:55px 0 22px}.footer-grid{display:grid;grid-template-columns:1.45fr .75fr .9fr 1fr;gap:38px}.footer-brand p,.footer-note{color:var(--dim);font-size:13px;margin-top:17px}.footer-title{font-weight:800;color:var(--text);margin-bottom:13px}.footer-links{display:grid;gap:7px;color:var(--muted);font-size:14px}.footer-links a:hover{color:var(--green)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:25px;margin-top:38px;border-top:1px solid var(--line);color:var(--dim);font-size:12px}.footer-bottom a:hover{color:var(--green)}
    @media (max-width:1024px){.nav-wrap{gap:18px}.brand{min-width:245px}.main-nav{gap:15px}.hero-layout{gap:38px}.topic-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.2fr 1fr 1fr;}.footer-grid>div:last-child{grid-column:span 3}}
    @media (max-width:768px){.container{width:min(var(--container),calc(100% - 34px))}.nav-wrap{min-height:70px;justify-content:space-between}.brand{min-width:0}.brand-name{font-size:15px}.main-nav{display:none;position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 18px;background:var(--bg-deep);border-bottom:1px solid var(--line)}.main-nav.show{display:flex}.main-nav a{padding:13px 0;font-size:15px}.main-nav a.active:after{bottom:5px;right:auto;width:35px}.nav-action{display:none}.menu-toggle{display:block}.page-hero{padding:55px 0 42px}.hero-layout{grid-template-columns:1fr;gap:34px}h1{font-size:clamp(36px,9vw,54px)}.hero-visual{min-height:290px}.section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}.content-map,.app-panel{grid-template-columns:1fr}.timeline-item{grid-template-columns:85px 1fr auto;gap:14px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-grid>div:last-child{grid-column:span 2}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:8px}}
    @media (max-width:520px){.container{width:calc(100% - 28px)}.brand-mark{width:32px;height:32px}.brand-name span{font-size:10px}.hero-actions,.app-actions{display:grid;grid-template-columns:1fr}.btn-primary,.btn-secondary{width:100%}.hero-visual{padding:20px;border-radius:25px}.orbit-card{left:20px;right:20px;bottom:20px;padding:17px}.orbit-card strong{font-size:20px}.topic-grid{grid-template-columns:1fr}.topic-panel{min-height:145px}.timeline-item{grid-template-columns:1fr auto;gap:4px 12px;padding:18px 0}.timeline-item .date{grid-column:1/-1}.timeline-item p{grid-column:1/-1}.app-panel{padding:26px 20px}.device{width:88px;height:155px}.device:nth-child(2){height:180px}.cta-box{display:block;padding:27px 23px}.cta-box h2{font-size:25px}.cta-box .hero-actions{margin-top:20px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:last-child{grid-column:auto}}

/* roulang page: category3 */
:root {
            --bg: #15131d;
            --bg-deep: #0e0d14;
            --surface: #211e2d;
            --surface-2: #29243a;
            --surface-3: #302a45;
            --text: #f4f1f8;
            --muted: #b4adbf;
            --dim: #81798d;
            --line: rgba(231, 224, 244, .13);
            --green: #b8f36a;
            --green-deep: #8acb3e;
            --purple: #a77bff;
            --purple-deep: #7653c8;
            --orange: #f4a36b;
            --radius-lg: 28px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --shadow: 0 22px 70px rgba(0, 0, 0, .28);
            --container: 1180px;
        }

        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            background:
                radial-gradient(circle at 82% 8%, rgba(167,123,255,.11), transparent 29rem),
                radial-gradient(circle at 5% 42%, rgba(184,243,106,.06), transparent 25rem),
                var(--bg);
            color: var(--text);
            font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: -1;
            pointer-events: none;
            opacity: .16;
            background-image: radial-gradient(rgba(255,255,255,.7) .7px, transparent .8px);
            background-size: 37px 37px;
            mask-image: linear-gradient(to bottom, black, transparent 72%);
        }
        a { color: inherit; text-decoration: none; }
        a:focus-visible, button:focus-visible { outline: 2px solid var(--green); outline-offset: 4px; }
        img { max-width: 100%; display: block; }
        button, input { font: inherit; }
        button { cursor: pointer; }
        .container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 20;
            background: rgba(14,13,20,.95);
            border-bottom: 1px solid var(--line);
            backdrop-filter: blur(16px);
        }
        .nav-wrap {
            min-height: 78px;
            display: flex;
            align-items: center;
            gap: 34px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 11px;
            min-width: 285px;
            font-weight: 800;
            letter-spacing: -.03em;
            line-height: 1.18;
        }
        .brand-mark {
            width: 37px;
            height: 37px;
            position: relative;
            flex: 0 0 auto;
            border: 2px solid var(--green);
            border-radius: 50%;
            transform: rotate(-22deg);
        }
        .brand-mark::before, .brand-mark::after {
            content: "";
            position: absolute;
            border: 1px solid var(--purple);
            border-radius: 50%;
            inset: 6px -5px;
        }
        .brand-mark::after { inset: -5px 6px; border-color: var(--orange); }
        .brand-name { font-size: 17px; }
        .brand-name span {
            display: block;
            color: var(--green);
            font-size: 12px;
            font-weight: 600;
            margin-top: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            flex: 1;
        }
        .main-nav a {
            position: relative;
            padding: 26px 0 24px;
            color: var(--muted);
            font-size: 14px;
            transition: color .25s ease;
            white-space: nowrap;
        }
        .main-nav a:hover, .main-nav a.active { color: var(--green); }
        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 16px;
            height: 2px;
            background: var(--green);
        }
        .nav-action, .btn-primary {
            background: var(--green);
            color: #171b11;
            font-weight: 800;
            border: 0;
            border-radius: 10px;
            transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
        }
        .nav-action {
            padding: 11px 17px;
            font-size: 13px;
            white-space: nowrap;
        }
        .nav-action:hover, .btn-primary:hover {
            background: #d0ff91;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(184,243,106,.16);
        }
        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--line);
            color: var(--text);
            border-radius: 8px;
            padding: 7px 10px;
        }

        .page-hero {
            position: relative;
            padding: 74px 0 62px;
            overflow: hidden;
        }
        .page-hero::after {
            content: "APP";
            position: absolute;
            right: -10px;
            top: 6px;
            color: rgba(167,123,255,.08);
            font-size: clamp(120px, 21vw, 280px);
            font-weight: 900;
            line-height: 1;
            letter-spacing: -.09em;
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--dim);
            font-size: 13px;
            margin-bottom: 34px;
        }
        .breadcrumb a:hover { color: var(--green); }
        .breadcrumb strong { color: var(--muted); font-weight: 600; }
        .hero-layout {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.15fr .85fr;
            gap: 70px;
            align-items: end;
        }
        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            color: var(--green);
            font-size: 12px;
            font-weight: 800;
            letter-spacing: .12em;
        }
        .section-kicker::before {
            content: "";
            width: 24px;
            height: 2px;
            background: var(--green);
        }
        h1, h2, h3, p { margin-top: 0; }
        h1 {
            max-width: 720px;
            margin: 16px 0 20px;
            font-size: clamp(38px, 5vw, 70px);
            line-height: 1.14;
            letter-spacing: -.055em;
            font-weight: 900;
        }
        h1 em { color: var(--purple); font-style: normal; }
        .hero-summary {
            max-width: 650px;
            color: var(--muted);
            font-size: 17px;
            line-height: 1.9;
            margin-bottom: 28px;
        }
        .hero-actions { display: flex; gap: 13px; flex-wrap: wrap; }
        .btn-primary, .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 0 21px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 800;
        }
        .btn-secondary {
            border: 1px solid rgba(167,123,255,.55);
            color: #e4d9ff;
            background: rgba(167,123,255,.08);
            transition: .25s ease;
        }
        .btn-secondary:hover {
            background: rgba(167,123,255,.18);
            border-color: var(--purple);
            transform: translateY(-2px);
        }
        .hero-status {
            border-left: 1px solid var(--purple);
            padding: 20px 0 20px 25px;
            color: var(--muted);
            max-width: 340px;
        }
        .hero-status strong {
            display: block;
            color: var(--text);
            font-size: 18px;
            margin-bottom: 6px;
        }
        .hero-status span {
            color: var(--green);
            font-size: 12px;
            letter-spacing: .08em;
        }

        .section { padding: 70px 0; }
        .section-heading {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 30px;
            margin-bottom: 30px;
        }
        .section-heading h2 {
            margin: 9px 0 0;
            font-size: clamp(28px, 3.3vw, 43px);
            line-height: 1.2;
            letter-spacing: -.04em;
        }
        .section-heading p {
            max-width: 430px;
            color: var(--muted);
            margin-bottom: 2px;
        }

        .app-panel {
            position: relative;
            display: grid;
            grid-template-columns: .95fr 1.05fr;
            gap: 40px;
            padding: 46px;
            background:
                linear-gradient(135deg, rgba(167,123,255,.21), transparent 52%),
                var(--surface);
            border: 1px solid rgba(167,123,255,.33);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .app-panel::before {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            right: -80px;
            top: -110px;
            border: 1px solid rgba(184,243,106,.24);
            border-radius: 50%;
            box-shadow: 0 0 0 28px rgba(184,243,106,.04), 0 0 0 58px rgba(184,243,106,.025);
        }
        .app-panel h2 { font-size: clamp(27px, 3vw, 40px); line-height: 1.25; margin: 13px 0 16px; }
        .app-panel p { color: var(--muted); }
        .app-points {
            display: grid;
            gap: 14px;
            margin: 26px 0 29px;
        }
        .app-point {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            font-size: 14px;
        }
        .app-point i {
            flex: 0 0 auto;
            width: 22px;
            height: 22px;
            border-radius: 7px;
            background: var(--green);
            display: grid;
            place-items: center;
            color: #171b11;
            font-style: normal;
            font-size: 13px;
            font-weight: 900;
        }
        .device-stage {
            position: relative;
            min-height: 330px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .device {
            position: relative;
            width: 174px;
            height: 320px;
            padding: 8px;
            border: 5px solid #0c0b11;
            border-radius: 28px;
            background: #0c0b11;
            box-shadow: 0 22px 42px rgba(0,0,0,.42);
            transform: rotate(-7deg);
            z-index: 2;
        }
        .device::before {
            content: "";
            position: absolute;
            width: 52px;
            height: 5px;
            top: 7px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 10px;
            background: #29243a;
            z-index: 2;
        }
        .device-screen {
            height: 100%;
            border-radius: 20px;
            padding: 28px 13px 14px;
            background:
                linear-gradient(155deg, rgba(184,243,106,.18), transparent 35%),
                #211e2d;
            overflow: hidden;
        }
        .screen-top {
            color: var(--green);
            font-size: 10px;
            font-weight: 800;
            letter-spacing: .08em;
            margin-bottom: 15px;
        }
        .screen-title {
            font-size: 19px;
            line-height: 1.35;
            font-weight: 900;
            margin-bottom: 16px;
        }
        .screen-card {
            padding: 12px 10px;
            margin-bottom: 9px;
            background: var(--surface-3);
            border-left: 3px solid var(--purple);
            border-radius: 8px;
        }
        .screen-card small {
            color: var(--dim);
            display: block;
            font-size: 9px;
            margin-bottom: 3px;
        }
        .screen-card b { font-size: 11px; line-height: 1.4; display: block; }
        .device-back {
            position: absolute;
            width: 153px;
            height: 286px;
            border: 1px solid rgba(184,243,106,.36);
            border-radius: 25px;
            background: var(--surface-2);
            transform: translate(108px, 15px) rotate(8deg);
            opacity: .8;
        }
        .device-label {
            position: absolute;
            right: 0;
            bottom: 12px;
            z-index: 3;
            padding: 10px 14px;
            color: #171b11;
            background: var(--orange);
            border-radius: 10px;
            font-size: 12px;
            font-weight: 900;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .feature-card {
            padding: 27px 25px;
            min-height: 218px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            transition: transform .25s ease, border-color .25s ease, background .25s ease;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            border-color: rgba(167,123,255,.62);
            background: var(--surface-2);
        }
        .feature-index {
            color: var(--purple);
            font-size: 12px;
            font-weight: 900;
            letter-spacing: .12em;
        }
        .feature-card h3 {
            margin: 20px 0 9px;
            font-size: 20px;
            line-height: 1.35;
        }
        .feature-card p { color: var(--muted); font-size: 14px; margin: 0; }
        .feature-card:nth-child(2) { transform: translateY(24px); }
        .feature-card:nth-child(2):hover { transform: translateY(19px); }
        .feature-card:nth-child(3) { border-top: 2px solid var(--green); }

        .path-section { background: rgba(14,13,20,.48); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
        .path-layout {
            display: grid;
            grid-template-columns: .72fr 1.28fr;
            gap: 60px;
            align-items: start;
        }
        .path-intro h2 { margin: 10px 0 15px; font-size: 36px; line-height: 1.25; }
        .path-intro p { color: var(--muted); }
        .path-list { position: relative; display: grid; gap: 0; }
        .path-list::before {
            content: "";
            position: absolute;
            left: 20px;
            top: 27px;
            bottom: 27px;
            width: 1px;
            background: linear-gradient(var(--purple), rgba(167,123,255,.08));
        }
        .path-item {
            position: relative;
            display: grid;
            grid-template-columns: 42px 1fr;
            gap: 18px;
            padding: 0 0 27px;
        }
        .path-item:last-child { padding-bottom: 0; }
        .path-number {
            position: relative;
            z-index: 1;
            width: 42px;
            height: 42px;
            display: grid;
            place-items: center;
            color: #171b11;
            background: var(--green);
            border-radius: 50%;
            font-weight: 900;
            font-size: 14px;
        }
        .path-item h3 { font-size: 18px; margin: 7px 0 5px; }
        .path-item p { color: var(--muted); font-size: 14px; margin: 0; }

        .content-strip {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 18px;
        }
        .content-card {
            min-height: 245px;
            padding: 30px;
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-md);
            border: 1px solid var(--line);
            background: var(--surface);
        }
        .content-card.primary {
            background:
                linear-gradient(115deg, rgba(167,123,255,.25), transparent 60%),
                var(--surface);
        }
        .content-card::after {
            content: "";
            position: absolute;
            width: 170px;
            height: 170px;
            right: -52px;
            bottom: -70px;
            border: 1px solid rgba(184,243,106,.28);
            border-radius: 50%;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 9px;
            color: var(--green);
            background: rgba(184,243,106,.1);
            border: 1px solid rgba(184,243,106,.2);
            border-radius: 6px;
            font-size: 11px;
            font-weight: 800;
        }
        .tag.purple { color: #d9c8ff; background: rgba(167,123,255,.13); border-color: rgba(167,123,255,.3); }
        .content-card h3 { position: relative; z-index: 1; max-width: 470px; margin: 20px 0 10px; font-size: 25px; line-height: 1.35; }
        .content-card p { position: relative; z-index: 1; max-width: 480px; color: var(--muted); font-size: 14px; }
        .content-link { position: absolute; z-index: 2; bottom: 25px; color: var(--green); font-size: 13px; font-weight: 800; }
        .content-link:hover { color: var(--text); }
        .mini-list { display: grid; gap: 0; }
        .mini-item {
            display: grid;
            grid-template-columns: 58px 1fr;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--line);
        }
        .mini-item:first-child { padding-top: 0; }
        .mini-item:last-child { border-bottom: 0; padding-bottom: 0; }
        .mini-date { color: var(--orange); font-size: 12px; font-weight: 800; padding-top: 3px; }
        .mini-item a { color: var(--text); font-size: 14px; line-height: 1.5; transition: color .2s ease; }
        .mini-item a:hover { color: var(--green); }

        .faq-list { border-top: 1px solid var(--line); }
        .faq-item { border-bottom: 1px solid var(--line); }
        .faq-question {
            width: 100%;
            padding: 21px 5px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            border: 0;
            background: transparent;
            color: var(--text);
            text-align: left;
            font-weight: 700;
        }
        .faq-question:hover { color: var(--green); }
        .faq-icon {
            width: 27px;
            height: 27px;
            flex: 0 0 auto;
            display: grid;
            place-items: center;
            border: 1px solid var(--line);
            border-radius: 50%;
            color: var(--green);
            transition: transform .25s ease, background .25s ease;
        }
        .faq-answer {
            display: none;
            max-width: 800px;
            padding: 0 55px 21px 5px;
            color: var(--muted);
            font-size: 14px;
        }
        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(184,243,106,.1); }

        .cta-panel {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 30px;
            padding: 36px 40px;
            background: var(--surface-2);
            border-left: 3px solid var(--green);
            border-radius: var(--radius-md);
        }
        .cta-panel h2 { margin: 0 0 7px; font-size: 29px; line-height: 1.3; }
        .cta-panel p { margin: 0; color: var(--muted); font-size: 14px; }

        .site-footer {
            padding: 60px 0 25px;
            background: var(--bg-deep);
            border-top: 1px solid var(--line);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr .75fr .9fr 1fr;
            gap: 38px;
            padding-bottom: 42px;
        }
        .footer-brand .brand { min-width: 0; margin-bottom: 20px; }
        .footer-brand p, .footer-note { color: var(--dim); font-size: 13px; line-height: 1.8; }
        .footer-title { margin-bottom: 15px; color: var(--text); font-size: 13px; font-weight: 800; }
        .footer-links { display: grid; gap: 9px; }
        .footer-links a { color: var(--dim); font-size: 13px; transition: color .2s ease; }
        .footer-links a:hover { color: var(--green); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            padding-top: 20px;
            color: var(--dim);
            border-top: 1px solid var(--line);
            font-size: 12px;
        }
        .footer-bottom a:hover { color: var(--green); }

        @media (max-width: 1024px) {
            .nav-wrap { gap: 18px; }
            .brand { min-width: 240px; }
            .main-nav { gap: 15px; }
            .hero-layout { gap: 38px; }
            .app-panel { padding: 34px; }
            .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
            .footer-grid > :last-child { grid-column: 2 / 4; }
        }
        @media (max-width: 768px) {
            .container { width: min(var(--container), calc(100% - 34px)); }
            .nav-wrap { min-height: 68px; justify-content: space-between; }
            .brand { min-width: 0; }
            .brand-name { font-size: 15px; }
            .brand-name span { font-size: 10px; }
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 17px;
                right: 17px;
                padding: 12px 18px;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                background: var(--bg-deep);
                border: 1px solid var(--line);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                box-shadow: var(--shadow);
            }
            .main-nav.show { display: flex; }
            .main-nav a { padding: 13px 0; border-bottom: 1px solid var(--line); }
            .main-nav a:last-child { border-bottom: 0; }
            .main-nav a.active::after { left: -8px; right: auto; top: 18px; bottom: auto; width: 3px; height: 17px; }
            .nav-action { display: none; }
            .menu-toggle { display: block; }
            .page-hero { padding: 50px 0 45px; }
            .hero-layout, .app-panel, .path-layout, .content-strip { grid-template-columns: 1fr; gap: 30px; }
            h1 { font-size: clamp(36px, 10vw, 56px); }
            .hero-status { margin-top: 5px; }
            .section { padding: 52px 0; }
            .section-heading { display: block; }
            .section-heading p { margin-top: 15px; }
            .app-panel { padding: 28px 22px; }
            .device-stage { min-height: 340px; }
            .feature-grid { grid-template-columns: 1fr; }
            .feature-card:nth-child(2), .feature-card:nth-child(2):hover { transform: none; }
            .path-intro h2 { font-size: 31px; }
            .content-card { min-height: 235px; }
            .cta-panel { display: block; padding: 28px 24px; }
            .cta-panel .btn-primary { margin-top: 22px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px 20px; }
            .footer-grid > :last-child { grid-column: auto; }
            .footer-bottom { display: block; }
            .footer-bottom span { display: block; margin-top: 8px; }
        }
        @media (max-width: 520px) {
            .container { width: min(var(--container), calc(100% - 28px)); }
            .breadcrumb { margin-bottom: 25px; }
            .hero-actions { display: grid; grid-template-columns: 1fr; }
            .hero-actions a { width: 100%; }
            .app-panel h2 { font-size: 28px; }
            .device { transform: scale(.88) rotate(-7deg); }
            .device-back { transform: translate(84px, 15px) scale(.88) rotate(8deg); }
            .device-label { right: 1px; }
            .footer-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category4 */
:root {
            --bg:#15131d;
            --bg-deep:#0e0d14;
            --surface:#211e2d;
            --surface-2:#29243a;
            --surface-3:#302a45;
            --text:#f4f1f8;
            --muted:#b4adbf;
            --dim:#81798d;
            --line:rgba(231,224,244,.13);
            --green:#b8f36a;
            --green-deep:#8acb3e;
            --purple:#a77bff;
            --purple-deep:#7653c8;
            --orange:#f4a36b;
            --radius-lg:28px;
            --radius-md:18px;
            --radius-sm:10px;
            --shadow:0 22px 70px rgba(0,0,0,.28);
            --container:1180px;
        }

        * { box-sizing:border-box; }
        html { scroll-behavior:smooth; }
        body {
            margin:0;
            background:
                radial-gradient(circle at 84% 7%,rgba(167,123,255,.12),transparent 28rem),
                radial-gradient(circle at 5% 45%,rgba(184,243,106,.055),transparent 26rem),
                var(--bg);
            color:var(--text);
            font-family:"Noto Sans SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;
            font-size:16px;
            line-height:1.75;
            overflow-x:hidden;
        }
        body::before {
            content:"";
            position:fixed;
            inset:0;
            pointer-events:none;
            opacity:.14;
            background-image:radial-gradient(rgba(255,255,255,.72) .7px,transparent .8px);
            background-size:37px 37px;
            mask-image:linear-gradient(to bottom,#000,transparent 73%);
        }
        a { color:inherit; text-decoration:none; }
        img { max-width:100%; display:block; }
        button,input { font:inherit; }
        button { cursor:pointer; }
        .container { width:min(var(--container),calc(100% - 48px)); margin:0 auto; }

        .site-header {
            position:sticky;
            top:0;
            z-index:30;
            background:rgba(14,13,20,.95);
            border-bottom:1px solid var(--line);
            backdrop-filter:blur(16px);
        }
        .nav-wrap {
            min-height:78px;
            display:flex;
            align-items:center;
            gap:30px;
        }
        .brand {
            display:inline-flex;
            align-items:center;
            gap:11px;
            min-width:285px;
            font-weight:800;
            letter-spacing:-.03em;
            line-height:1.18;
        }
        .brand-mark {
            width:37px;
            height:37px;
            position:relative;
            flex:0 0 auto;
            border:2px solid var(--green);
            border-radius:50%;
            transform:rotate(-22deg);
        }
        .brand-mark::before,
        .brand-mark::after {
            content:"";
            position:absolute;
            border:1px solid var(--purple);
            border-radius:50%;
            inset:6px -5px;
        }
        .brand-mark::after { inset:-5px 6px; border-color:var(--orange); }
        .brand-name { font-size:17px; }
        .brand-name span {
            display:block;
            color:var(--green);
            font-size:12px;
            font-weight:600;
            margin-top:2px;
        }
        .main-nav {
            display:flex;
            align-items:center;
            gap:24px;
            flex:1;
        }
        .main-nav a {
            position:relative;
            padding:26px 0 24px;
            color:var(--muted);
            font-size:14px;
            transition:color .25s ease;
            white-space:nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active { color:var(--green); }
        .main-nav a.active::after {
            content:"";
            position:absolute;
            left:0;
            right:0;
            bottom:16px;
            height:2px;
            background:var(--green);
        }
        .nav-action,
        .btn-primary {
            background:var(--green);
            color:#171b11;
            font-weight:800;
            border:0;
            border-radius:10px;
            transition:transform .25s ease,background .25s ease,box-shadow .25s ease;
        }
        .nav-action {
            padding:11px 17px;
            font-size:13px;
            white-space:nowrap;
        }
        .nav-action:hover,
        .btn-primary:hover {
            background:#d0ff91;
            color:#171b11;
            transform:translateY(-2px);
            box-shadow:0 10px 25px rgba(184,243,106,.16);
        }
        .menu-toggle {
            display:none;
            background:transparent;
            border:1px solid var(--line);
            color:var(--text);
            border-radius:8px;
            padding:7px 10px;
        }

        .page-hero {
            position:relative;
            padding:72px 0 68px;
            overflow:hidden;
        }
        .page-hero::after {
            content:"";
            position:absolute;
            width:480px;
            height:480px;
            right:-140px;
            top:-210px;
            border:1px solid rgba(167,123,255,.24);
            border-radius:50%;
            box-shadow:0 0 0 32px rgba(167,123,255,.035),0 0 0 68px rgba(167,123,255,.025);
            pointer-events:none;
        }
        .breadcrumb {
            display:flex;
            align-items:center;
            gap:10px;
            color:var(--dim);
            font-size:13px;
            margin-bottom:30px;
        }
        .breadcrumb a:hover { color:var(--green); }
        .breadcrumb strong { color:var(--muted); font-weight:600; }
        .hero-layout {
            display:grid;
            grid-template-columns:minmax(0,1.1fr) minmax(340px,.9fr);
            gap:70px;
            align-items:center;
        }
        .eyebrow,
        .section-kicker {
            display:inline-flex;
            align-items:center;
            gap:9px;
            color:var(--green);
            font-size:12px;
            font-weight:800;
            letter-spacing:.12em;
        }
        .eyebrow::before,
        .section-kicker::before {
            content:"";
            width:24px;
            height:2px;
            background:var(--green);
        }
        h1,h2,h3,p { margin-top:0; }
        h1 {
            max-width:760px;
            margin:16px 0 20px;
            font-size:clamp(40px,5.3vw,70px);
            line-height:1.14;
            letter-spacing:-.055em;
            font-weight:900;
        }
        h1 em { color:var(--green); font-style:normal; }
        .hero-text {
            max-width:650px;
            color:var(--muted);
            font-size:17px;
            line-height:1.9;
            margin-bottom:30px;
        }
        .hero-actions {
            display:flex;
            flex-wrap:wrap;
            gap:13px;
        }
        .btn-primary,
        .btn-secondary {
            display:inline-flex;
            align-items:center;
            justify-content:center;
            min-height:48px;
            padding:0 20px;
            font-size:14px;
        }
        .btn-secondary {
            color:var(--text);
            border:1px solid rgba(167,123,255,.48);
            background:rgba(41,36,58,.85);
            border-radius:10px;
            transition:all .25s ease;
        }
        .btn-secondary:hover {
            color:var(--green);
            border-color:var(--green);
            transform:translateY(-2px);
            background:var(--surface-3);
        }
        .hero-status {
            display:flex;
            flex-wrap:wrap;
            gap:9px;
            margin-top:34px;
        }
        .status-item {
            display:inline-flex;
            align-items:center;
            gap:8px;
            padding:7px 11px;
            color:var(--muted);
            font-size:12px;
            border:1px solid var(--line);
            background:rgba(33,30,45,.72);
            border-radius:var(--radius-sm);
        }
        .status-dot {
            width:7px;
            height:7px;
            border-radius:50%;
            background:var(--green);
            box-shadow:0 0 0 4px rgba(184,243,106,.08);
        }

        .orbit-panel {
            position:relative;
            min-height:370px;
            border:1px solid var(--line);
            border-radius:var(--radius-lg);
            background:
                linear-gradient(135deg,rgba(48,42,69,.88),rgba(30,27,42,.92)),
                var(--surface);
            overflow:hidden;
            box-shadow:var(--shadow);
        }
        .orbit-panel::before {
            content:"";
            position:absolute;
            width:390px;
            height:170px;
            left:4%;
            top:24%;
            border:1px solid rgba(184,243,106,.38);
            border-radius:50%;
            transform:rotate(-24deg);
        }
        .orbit-panel::after {
            content:"";
            position:absolute;
            width:350px;
            height:130px;
            left:12%;
            top:33%;
            border:1px solid rgba(167,123,255,.5);
            border-radius:50%;
            transform:rotate(25deg);
        }
        .orbit-grid {
            position:absolute;
            inset:0;
            opacity:.25;
            background:
                linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),
                linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);
            background-size:34px 34px;
            mask-image:radial-gradient(circle at center,#000,transparent 75%);
        }
        .orbit-core {
            position:absolute;
            width:112px;
            height:112px;
            left:50%;
            top:50%;
            transform:translate(-50%,-50%);
            border-radius:50%;
            background:radial-gradient(circle at 35% 30%,#e6ffbb 0 5%,var(--green) 6% 21%,#566b39 48%,#272b2e 70%);
            box-shadow:0 0 0 12px rgba(184,243,106,.08),0 0 55px rgba(184,243,106,.22);
        }
        .orbit-core::after {
            content:"星空";
            position:absolute;
            inset:0;
            display:grid;
            place-items:center;
            color:#1b2312;
            font-size:20px;
            font-weight:900;
        }
        .orbit-label {
            position:absolute;
            padding:7px 10px;
            color:var(--text);
            background:rgba(14,13,20,.84);
            border:1px solid var(--line);
            border-radius:8px;
            font-size:12px;
            z-index:2;
        }
        .orbit-label.one { top:54px; right:42px; color:var(--purple); }
        .orbit-label.two { bottom:58px; left:34px; color:var(--orange); }
        .orbit-label.three { bottom:38px; right:55px; color:var(--green); }
        .panel-caption {
            position:absolute;
            left:24px;
            right:24px;
            bottom:21px;
            display:flex;
            justify-content:space-between;
            gap:18px;
            color:var(--muted);
            font-size:12px;
            z-index:3;
        }
        .panel-caption strong { color:var(--text); font-size:14px; }

        .section { padding:86px 0; }
        .section-header {
            display:flex;
            align-items:end;
            justify-content:space-between;
            gap:30px;
            margin-bottom:30px;
        }
        .section-title {
            max-width:660px;
            margin:11px 0 0;
            font-size:clamp(28px,3.5vw,44px);
            line-height:1.25;
            letter-spacing:-.04em;
        }
        .section-desc {
            max-width:470px;
            color:var(--muted);
            margin:0;
            font-size:15px;
        }

        .map-board {
            position:relative;
            display:grid;
            grid-template-columns:1.15fr .85fr;
            gap:1px;
            background:var(--line);
            border:1px solid var(--line);
            border-radius:var(--radius-lg);
            overflow:hidden;
        }
        .map-main,
        .map-side { background:var(--surface); }
        .map-main { padding:38px; }
        .map-side {
            display:flex;
            flex-direction:column;
            justify-content:center;
            padding:30px;
            background:var(--surface-2);
        }
        .map-index {
            display:flex;
            align-items:center;
            gap:14px;
            color:var(--green);
            font-size:13px;
            font-weight:800;
            letter-spacing:.1em;
            text-transform:uppercase;
        }
        .map-index span {
            display:grid;
            place-items:center;
            width:38px;
            height:38px;
            border:1px solid var(--green);
            border-radius:50%;
        }
        .map-main h3 {
            max-width:570px;
            margin:23px 0 13px;
            font-size:30px;
            line-height:1.3;
            letter-spacing:-.04em;
        }
        .map-main p { color:var(--muted); max-width:590px; margin-bottom:25px; }
        .topic-line {
            display:flex;
            flex-wrap:wrap;
            gap:9px;
        }
        .topic-tag {
            padding:7px 11px;
            color:var(--muted);
            border:1px solid var(--line);
            border-radius:8px;
            font-size:12px;
        }
        .topic-tag:hover { color:var(--green); border-color:var(--green); }
        .map-side-title {
            color:var(--dim);
            font-size:12px;
            letter-spacing:.12em;
            margin-bottom:16px;
        }
        .map-side-list { margin:0; padding:0; list-style:none; }
        .map-side-list li {
            display:flex;
            align-items:center;
            justify-content:space-between;
            gap:20px;
            padding:15px 0;
            border-bottom:1px solid var(--line);
            color:var(--muted);
            font-size:14px;
        }
        .map-side-list li:last-child { border-bottom:0; }
        .map-side-list b { color:var(--text); font-weight:700; }
        .map-side-list span { color:var(--purple); font-size:12px; }

        .theme-rail {
            display:grid;
            grid-template-columns:repeat(4,1fr);
            gap:14px;
        }
        .theme-item {
            position:relative;
            min-height:190px;
            padding:24px 20px;
            border:1px solid var(--line);
            border-radius:var(--radius-md);
            background:var(--surface);
            transition:transform .25s ease,border-color .25s ease,background .25s ease;
            overflow:hidden;
        }
        .theme-item::after {
            content:"";
            position:absolute;
            width:90px;
            height:90px;
            right:-26px;
            bottom:-28px;
            border:1px solid rgba(167,123,255,.4);
            border-radius:50%;
        }
        .theme-item:hover {
            transform:translateY(-5px);
            border-color:rgba(184,243,106,.55);
            background:var(--surface-2);
        }
        .theme-no { color:var(--purple); font-size:12px; font-weight:800; }
        .theme-item h3 { margin:25px 0 8px; font-size:20px; }
        .theme-item p { color:var(--muted); margin:0; font-size:13px; line-height:1.7; }

        .content-route {
            display:grid;
            grid-template-columns:.75fr 1.25fr;
            gap:22px;
            align-items:stretch;
        }
        .route-intro {
            padding:34px;
            border-radius:var(--radius-lg);
            background:var(--surface-2);
            border:1px solid var(--line);
        }
        .route-intro h3 { font-size:26px; line-height:1.35; margin:13px 0 14px; }
        .route-intro p { color:var(--muted); margin-bottom:24px; }
        .route-list {
            display:flex;
            flex-direction:column;
            gap:10px;
        }
        .route-row {
            display:grid;
            grid-template-columns:50px 1fr auto;
            align-items:center;
            gap:16px;
            padding:18px 20px;
            border:1px solid var(--line);
            border-radius:var(--radius-md);
            background:var(--surface);
            transition:all .25s ease;
        }
        .route-row:hover {
            transform:translateX(5px);
            border-color:rgba(167,123,255,.52);
            background:var(--surface-2);
        }
        .route-number {
            color:var(--orange);
            font-size:13px;
            font-weight:900;
        }
        .route-row strong { display:block; font-size:15px; }
        .route-row small { display:block; color:var(--dim); margin-top:3px; }
        .route-arrow { color:var(--green); font-size:20px; }

        .app-section {
            padding:76px 0;
            background:
                linear-gradient(110deg,rgba(48,42,69,.96),rgba(33,30,45,.96)),
                var(--surface);
            border-top:1px solid var(--line);
            border-bottom:1px solid var(--line);
        }
        .app-layout {
            display:grid;
            grid-template-columns:1fr .85fr;
            gap:60px;
            align-items:center;
        }
        .app-copy h2 { margin:12px 0 15px; font-size:clamp(30px,4vw,48px); line-height:1.2; letter-spacing:-.045em; }
        .app-copy p { color:var(--muted); max-width:590px; }
        .app-points {
            display:grid;
            grid-template-columns:repeat(2,1fr);
            gap:12px;
            margin:28px 0;
        }
        .app-point {
            padding:14px 15px;
            border-left:2px solid var(--purple);
            background:rgba(14,13,20,.24);
            color:var(--muted);
            font-size:13px;
        }
        .device-stage {
            min-height:300px;
            position:relative;
            display:flex;
            justify-content:center;
            align-items:center;
        }
        .device {
            width:148px;
            height:278px;
            padding:9px;
            border:2px solid #5d536e;
            border-radius:25px;
            background:#121019;
            box-shadow:0 20px 40px rgba(0,0,0,.28);
            transform:rotate(-8deg);
        }
        .device.back { position:absolute; margin-left:158px; transform:rotate(9deg) scale(.87); opacity:.72; }
        .device-screen {
            height:100%;
            padding:16px 11px;
            border-radius:18px;
            background:linear-gradient(160deg,#2c2540,#15131d 65%);
            overflow:hidden;
        }
        .device-bar { height:7px; width:54px; background:var(--green); border-radius:5px; margin-bottom:18px; }
        .device-screen h4 { font-size:13px; margin:0 0 18px; }
        .screen-card {
            padding:11px 9px;
            margin-bottom:9px;
            border:1px solid rgba(255,255,255,.12);
            border-radius:9px;
            background:rgba(255,255,255,.05);
        }
        .screen-card i { display:block; width:32px; height:4px; background:var(--purple); border-radius:5px; margin-bottom:8px; }
        .screen-card span { display:block; width:72%; height:5px; background:#777084; border-radius:4px; }
        .screen-card b { display:block; width:47%; height:5px; background:#50485e; border-radius:4px; margin-top:6px; }

        .faq-wrap { max-width:850px; }
        .faq-item {
            border-top:1px solid var(--line);
        }
        .faq-item:last-child { border-bottom:1px solid var(--line); }
        .faq-question {
            width:100%;
            display:flex;
            justify-content:space-between;
            align-items:center;
            gap:20px;
            padding:21px 0;
            color:var(--text);
            text-align:left;
            background:none;
            border:0;
            font-weight:700;
        }
        .faq-question:hover { color:var(--green); }
        .faq-icon {
            position:relative;
            flex:0 0 auto;
            width:27px;
            height:27px;
            border:1px solid var(--line);
            border-radius:50%;
        }
        .faq-icon::before,
        .faq-icon::after {
            content:"";
            position:absolute;
            left:7px;
            right:7px;
            top:12px;
            height:1px;
            background:var(--green);
        }
        .faq-icon::after { transform:rotate(90deg); transition:transform .25s ease; }
        .faq-answer {
            display:none;
            padding:0 54px 21px 0;
            color:var(--muted);
            font-size:14px;
            line-height:1.85;
        }
        .faq-item.open .faq-answer { display:block; }
        .faq-item.open .faq-icon { border-color:var(--green); }
        .faq-item.open .faq-icon::after { transform:rotate(0); }

        .cta-section { padding:78px 0 88px; }
        .cta-box {
            position:relative;
            display:flex;
            justify-content:space-between;
            align-items:center;
            gap:30px;
            padding:38px 42px;
            border-radius:var(--radius-lg);
            background:var(--green);
            color:#171b11;
            overflow:hidden;
        }
        .cta-box::after {
            content:"";
            position:absolute;
            right:30px;
            top:-75px;
            width:210px;
            height:210px;
            border:1px solid rgba(23,27,17,.2);
            border-radius:50%;
            box-shadow:0 0 0 28px rgba(23,27,17,.06),0 0 0 58px rgba(23,27,17,.05);
        }
        .cta-box h2 { position:relative; z-index:1; margin:0 0 7px; font-size:30px; line-height:1.25; }
        .cta-box p { position:relative; z-index:1; margin:0; color:var(--muted); }
        .cta-box .btn-secondary {
            position:relative;
            z-index:2;
            color:#171b11;
            border-color:rgba(23,27,17,.35);
            background:rgba(255,255,255,.2);
        }
        .cta-box .btn-secondary:hover {
            color:#171b11;
            border-color:#171b11;
            background:rgba(255,255,255,.35);
        }

        .site-footer {
            padding:58px 0 24px;
            background:var(--bg-deep);
            border-top:1px solid var(--line);
        }
        .footer-grid {
            display:grid;
            grid-template-columns:1.45fr .8fr .9fr 1fr;
            gap:38px;
            padding-bottom:42px;
        }
        .footer-brand p {
            max-width:320px;
            margin:18px 0 0;
            color:var(--dim);
            font-size:13px;
            line-height:1.8;
        }
        .footer-title {
            margin-bottom:14px;
            color:var(--text);
            font-size:13px;
            font-weight:800;
        }
        .footer-links {
            display:flex;
            flex-direction:column;
            gap:9px;
        }
        .footer-links a {
            color:var(--dim);
            font-size:13px;
            transition:color .2s ease;
        }
        .footer-links a:hover { color:var(--green); }
        .footer-note {
            margin:0;
            color:var(--dim);
            font-size:13px;
            line-height:1.8;
        }
        .footer-bottom {
            display:flex;
            justify-content:space-between;
            gap:20px;
            padding-top:22px;
            border-top:1px solid var(--line);
            color:var(--dim);
            font-size:12px;
        }
        .footer-bottom a:hover { color:var(--green); }

        @media (max-width:1024px) {
            .nav-wrap { gap:18px; }
            .brand { min-width:250px; }
            .main-nav { gap:16px; }
            .main-nav a { font-size:13px; }
            .hero-layout { gap:40px; }
            .theme-rail { grid-template-columns:repeat(2,1fr); }
            .footer-grid { grid-template-columns:1.3fr 1fr 1fr; }
            .footer-grid > :last-child { grid-column:1 / -1; }
        }
        @media (max-width:768px) {
            .container { width:min(var(--container),calc(100% - 36px)); }
            .nav-wrap { min-height:70px; }
            .brand { min-width:0; flex:1; }
            .brand-name { font-size:15px; }
            .brand-name span { font-size:11px; }
            .main-nav {
                display:none;
                position:absolute;
                left:18px;
                right:18px;
                top:70px;
                padding:10px 18px 18px;
                flex-direction:column;
                align-items:stretch;
                gap:0;
                background:var(--bg-deep);
                border:1px solid var(--line);
                border-radius:0 0 16px 16px;
                box-shadow:var(--shadow);
            }
            .main-nav.show { display:flex; }
            .main-nav a { padding:13px 0; border-bottom:1px solid var(--line); }
            .main-nav a:last-child { border-bottom:0; }
            .main-nav a.active::after { bottom:0; right:auto; width:32px; }
            .nav-action { display:none; }
            .menu-toggle { display:block; }
            .page-hero { padding:44px 0 50px; }
            .hero-layout,
            .map-board,
            .content-route,
            .app-layout { grid-template-columns:1fr; }
            .hero-layout { gap:34px; }
            .orbit-panel { min-height:300px; }
            .section { padding:62px 0; }
            .section-header { display:block; }
            .section-desc { margin-top:14px; }
            .map-side { padding:25px 30px; }
            .app-layout { gap:28px; }
            .device-stage { min-height:270px; }
            .cta-box { display:block; padding:31px 28px; }
            .cta-box .hero-actions { margin-top:24px; }
            .footer-grid { grid-template-columns:1fr 1fr; gap:28px 22px; }
            .footer-grid > :last-child { grid-column:1 / -1; }
            .footer-bottom { display:block; }
            .footer-bottom span { display:block; margin-top:8px; }
        }
        @media (max-width:520px) {
            h1 { font-size:38px; }
            .hero-text { font-size:15px; }
            .hero-actions { flex-direction:column; align-items:stretch; }
            .btn-primary,
            .btn-secondary { width:100%; }
            .hero-status { display:grid; grid-template-columns:1fr; }
            .orbit-panel { min-height:260px; }
            .orbit-panel::before { width:300px; left:-4%; }
            .orbit-panel::after { width:270px; left:7%; }
            .orbit-label.one { top:32px; right:18px; }
            .orbit-label.two { bottom:52px; left:18px; }
            .orbit-label.three { bottom:25px; right:20px; }
            .panel-caption { left:16px; right:16px; }
            .map-main { padding:27px 22px; }
            .map-main h3 { font-size:24px; }
            .theme-rail { grid-template-columns:1fr; }
            .theme-item { min-height:155px; }
            .route-intro { padding:27px 22px; }
            .route-row { grid-template-columns:34px 1fr 20px; gap:10px; padding:15px 14px; }
            .app-points { grid-template-columns:1fr; }
            .app-copy h2 { font-size:32px; }
            .footer-grid { grid-template-columns:1fr; }
            .footer-grid > :last-child { grid-column:auto; }
        }
        :focus-visible {
            outline:2px solid var(--green);
            outline-offset:4px;
        }

/* 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}