/* roulang page: index */
:root {
            --bg: #0d0f14;
            --bg-2: #11151d;
            --panel: rgba(18, 21, 29, .76);
            --panel-solid: #151923;
            --text: #f3f4f6;
            --muted: #a6adbb;
            --muted-2: #7b8496;
            --line: rgba(255,255,255,.10);
            --line-strong: rgba(255,255,255,.16);
            --brand: #f79a1f;
            --brand-2: #f43f5e;
            --brand-3: #8b5cf6;
            --brand-4: #06b6d4;
            --radius-xl: 28px;
            --radius-lg: 22px;
            --radius-md: 18px;
            --shadow-lg: 0 24px 60px rgba(0,0,0,.34);
            --shadow-md: 0 12px 36px rgba(0,0,0,.24);
            --shadow-sm: 0 8px 18px rgba(0,0,0,.18);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            min-height: 100vh;
            color: var(--text);
            background:
                radial-gradient(circle at 15% 10%, rgba(247,154,31,.16), transparent 26%),
                radial-gradient(circle at 90% 0%, rgba(139,92,246,.14), transparent 22%),
                radial-gradient(circle at 50% 80%, rgba(6,182,212,.10), transparent 24%),
                linear-gradient(180deg, #0b0d12 0%, #0d1016 42%, #0b0d12 100%);
            font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            background:
                linear-gradient(120deg, rgba(255,255,255,.04) 0%, rgba(255,255,255,0) 25%),
                radial-gradient(circle at 50% 0%, rgba(255,255,255,.04), transparent 32%);
            opacity: .58;
            mix-blend-mode: screen;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .18s ease, opacity .18s ease, transform .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
        }
        img { max-width: 100%; display: block; }
        button, input, textarea, select {
            font: inherit;
        }
        ::selection {
            background: rgba(247,154,31,.28);
            color: #fff;
        }
        .site-shell { position: relative; isolation: isolate; }
        .dock-shell {
            background: linear-gradient(180deg, rgba(25,29,40,.88), rgba(16,19,27,.78));
            border: 1px solid var(--line);
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .panel {
            background:
                linear-gradient(180deg, rgba(25,29,40,.84), rgba(17,20,29,.76));
            border: 1px solid var(--line);
            box-shadow: var(--shadow-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }
        .panel-soft {
            background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.015));
            border: 1px solid rgba(255,255,255,.09);
        }
        .section-title {
            letter-spacing: -.02em;
            text-wrap: balance;
        }
        .muted {
            color: var(--muted);
        }
        .muted-2 {
            color: var(--muted-2);
        }
        .hero-sheen {
            background:
                radial-gradient(circle at 20% 20%, rgba(247,154,31,.25), transparent 30%),
                radial-gradient(circle at 80% 30%, rgba(243,63,94,.18), transparent 28%),
                radial-gradient(circle at 50% 95%, rgba(6,182,212,.12), transparent 22%),
                linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
        }
        .pill {
            border-radius: 999px;
        }
        .lift {
            transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease, opacity .22s ease;
        }
        .lift:hover {
            transform: translateY(-3px);
            border-color: rgba(255,255,255,.18);
            box-shadow: 0 22px 48px rgba(0,0,0,.30);
        }
        .soft-link {
            color: #ffd79c;
        }
        .soft-link:hover {
            color: #fff3db;
        }
        .btn-brand {
            background: linear-gradient(135deg, #f79a1f 0%, #f43f5e 100%);
            box-shadow: 0 16px 35px rgba(244,63,94,.22);
            color: #fff;
        }
        .btn-brand:hover {
            filter: saturate(1.05);
            transform: translateY(-1px);
            box-shadow: 0 20px 44px rgba(244,63,94,.28);
        }
        .btn-line {
            background: rgba(255,255,255,.03);
            border: 1px solid rgba(255,255,255,.12);
            color: #f5f7fa;
        }
        .btn-line:hover {
            background: rgba(255,255,255,.06);
            border-color: rgba(255,255,255,.18);
        }
        .input-field {
            width: 100%;
            border-radius: 18px;
            background: rgba(255,255,255,.04);
            border: 1px solid rgba(255,255,255,.10);
            color: #f7fafc;
            padding: 0.95rem 1rem;
            outline: none;
            transition: border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
        }
        .input-field::placeholder { color: rgba(166,173,187,.8); }
        .input-field:focus {
            border-color: rgba(247,154,31,.55);
            box-shadow: 0 0 0 4px rgba(247,154,31,.12);
            background: rgba(255,255,255,.06);
        }
        .details-item {
            border: 1px solid rgba(255,255,255,.10);
            background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
            border-radius: 22px;
            overflow: hidden;
        }
        .details-item summary {
            list-style: none;
            cursor: pointer;
        }
        .details-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-arrow {
            transition: transform .2s ease;
        }
        details[open] .faq-arrow {
            transform: rotate(180deg);
        }
        .news-link:hover .news-title {
            color: #fff;
        }
        .grid-lines {
            position: relative;
        }
        .grid-lines::after {
            content: "";
            position: absolute;
            inset: 0;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%;
            opacity: .20;
            mask-image: radial-gradient(circle at center, black 34%, transparent 72%);
        }
        .scrollbar-hide::-webkit-scrollbar { display: none; }
        .scrollbar-hide { -ms-overflow-style: none; scrollbar-width: none; }
        .stats-digit {
            background: linear-gradient(180deg, #ffffff 0%, #f3f4f6 40%, #d1d5db 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

/* roulang page: article */
:root {
            --bg: #0d0f14;
            --bg-2: #11151d;
            --panel: rgba(18, 21, 29, .76);
            --panel-solid: #151923;
            --text: #f3f4f6;
            --muted: #a6adbb;
            --muted-2: #7b8496;
            --line: rgba(255,255,255,.10);
            --line-strong: rgba(255,255,255,.16);
            --brand: #f79a1f;
            --brand-2: #f43f5e;
            --brand-3: #8b5cf6;
            --brand-4: #06b6d4;
            --radius-xl: 28px;
            --radius-lg: 22px;
            --radius-md: 18px;
            --shadow-lg: 0 24px 60px rgba(0,0,0,.34);
            --shadow-md: 0 12px 36px rgba(0,0,0,.24);
            --shadow-sm: 0 8px 18px rgba(0,0,0,.18);
        }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            min-height: 100vh;
            color: var(--text);
            background:
                radial-gradient(circle at 15% 10%, rgba(247,154,31,.16), transparent 26%),
                radial-gradient(circle at 90% 0%, rgba(139,92,246,.14), transparent 22%),
                radial-gradient(circle at 50% 80%, rgba(6,182,212,.10), transparent 24%),
                linear-gradient(180deg, #0b0d12 0%, #0d1016 42%, #0b0d12 100%);
            font-family: Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            background:
                linear-gradient(120deg, rgba(255,255,255,.04) 0%, rgba(255,255,255,0) 25%),
                radial-gradient(circle at 50% 0%, rgba(255,255,255,.04), transparent 32%);
            opacity: .58;
            mix-blend-mode: screen;
            z-index: 0;
        }
        ::selection {
            background: rgba(247,154,31,.34);
            color: #fff;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .18s ease, opacity .18s ease, transform .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
        }
        img { max-width: 100%; display: block; }
        button, input, textarea, select {
            font: inherit;
        }
        .section-title {
            letter-spacing: -.02em;
            text-wrap: balance;
        }
        .muted { color: var(--muted); }
        .muted-2 { color: var(--muted-2); }
        .hero-sheen {
            background:
                radial-gradient(circle at 20% 20%, rgba(247,154,31,.25), transparent 30%),
                radial-gradient(circle at 80% 30%, rgba(243,63,94,.18), transparent 28%),
                radial-gradient(circle at 50% 95%, rgba(6,182,212,.12), transparent 22%),
                linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
        }
        .pill {
            border-radius: 999px;
        }
        .btn-brand {
            background: linear-gradient(135deg, #f79a1f 0%, #f43f5e 100%);
            box-shadow: 0 16px 35px rgba(244,63,94,.22);
            color: #fff;
        }
        .btn-brand:hover {
            filter: saturate(1.05);
            transform: translateY(-1px);
            box-shadow: 0 20px 44px rgba(244,63,94,.28);
        }
        .btn-line {
            background: rgba(255,255,255,.03);
            border: 1px solid rgba(255,255,255,.12);
            color: #f5f7fa;
        }
        .btn-line:hover {
            background: rgba(255,255,255,.06);
            border-color: rgba(255,255,255,.18);
        }
        .input-field {
            width: 100%;
            border-radius: 18px;
            background: rgba(255,255,255,.04);
            border: 1px solid rgba(255,255,255,.10);
            color: #f7fafc;
            padding: 0.95rem 1rem;
            outline: none;
            transition: border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
        }
        .input-field::placeholder { color: rgba(166,173,187,.8); }
        .input-field:focus {
            border-color: rgba(247,154,31,.55);
            box-shadow: 0 0 0 4px rgba(247,154,31,.12);
            background: rgba(255,255,255,.06);
        }
        .details-item {
            border: 1px solid rgba(255,255,255,.10);
            background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
            border-radius: 22px;
            overflow: hidden;
        }
        .details-item summary {
            list-style: none;
            cursor: pointer;
        }
        .details-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-arrow {
            transition: transform .2s ease;
        }
        details[open] .faq-arrow {
            transform: rotate(180deg);
        }
        .news-link:hover .news-title {
            color: #fff;
        }
        .grid-lines {
            position: relative;
        }
        .grid-lines::after {
            content: "";
            position: absolute;
            inset: 0;
            pointer-events: none;
            background-image:
                linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%;
            opacity: .20;
            mask-image: radial-gradient(circle at center, black 34%, transparent 72%);
        }
        .dock-shell {
            background: rgba(18, 21, 29, .78);
            border: 1px solid rgba(255,255,255,.12);
            box-shadow: 0 16px 42px rgba(0,0,0,.30);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .shadow-glow {
            box-shadow: 0 0 0 1px rgba(247,154,31,.22), 0 14px 26px rgba(244,63,94,.18);
        }
        .bg-white\/5 { background-color: rgba(255,255,255,.05); }
        .bg-white\/8 { background-color: rgba(255,255,255,.08); }
        .bg-black\/20 { background-color: rgba(0,0,0,.20); }
        .border-white\/10 { border-color: rgba(255,255,255,.10); }
        .border-white\/12 { border-color: rgba(255,255,255,.12); }
        .border-white\/20 { border-color: rgba(255,255,255,.20); }
        .hover\:bg-white\/5:hover { background-color: rgba(255,255,255,.05); }
        .hover\:bg-white\/8:hover { background-color: rgba(255,255,255,.08); }
        .hover\:border-white\/12:hover { border-color: rgba(255,255,255,.12); }
        .hover\:border-white\/20:hover { border-color: rgba(255,255,255,.20); }
        .article-shell,
        .article-panel,
        .info-panel,
        .update-card,
        .faq-card,
        .hero-card {
            background: var(--panel);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .article-content {
            color: #d8dee9;
            font-size: 1rem;
            line-height: 1.92;
        }
        .article-content > * + * {
            margin-top: 1.15rem;
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: #fff;
            letter-spacing: -.02em;
            line-height: 1.35;
            margin-top: 2rem;
            margin-bottom: .85rem;
        }
        .article-content h2 { font-size: 1.65rem; }
        .article-content h3 { font-size: 1.2rem; }
        .article-content h4 { font-size: 1.05rem; }
        .article-content p {
            color: #c7ceda;
        }
        .article-content ul,
        .article-content ol {
            margin: 1rem 0 1rem 1.2rem;
            color: #c7ceda;
        }
        .article-content li + li {
            margin-top: .45rem;
        }
        .article-content blockquote {
            margin: 1.4rem 0;
            padding: 1rem 1.1rem;
            border-left: 3px solid rgba(247,154,31,.78);
            background: rgba(255,255,255,.04);
            color: #edf2f7;
            border-radius: 18px;
        }
        .article-content code {
            padding: .18rem .45rem;
            border-radius: 8px;
            background: rgba(255,255,255,.08);
            color: #ffe7c2;
        }
        .article-content pre {
            overflow: auto;
            padding: 1rem 1.1rem;
            border-radius: 20px;
            background: #0a0d12;
            border: 1px solid var(--line);
        }
        .article-content img {
            margin: 1.2rem 0;
            border-radius: 22px;
            border: 1px solid var(--line);
        }
        .article-content hr {
            border: 0;
            border-top: 1px solid var(--line);
            margin: 1.8rem 0;
        }
        .article-content a {
            color: #fbbf24;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
            overflow: hidden;
            border-radius: 16px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--line);
            padding: .8rem .9rem;
        }
        .article-content th {
            background: rgba(255,255,255,.04);
            color: #fff;
        }
        .scrollbar-hide::-webkit-scrollbar {
            display: none;
        }
        .scrollbar-hide {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        @media (max-width: 1024px) {
            .article-content h2 { font-size: 1.42rem; }
        }
        @media (max-width: 640px) {
            .article-content { font-size: .98rem; line-height: 1.88; }
            .article-content h2 { font-size: 1.28rem; }
            .article-content h3 { font-size: 1.08rem; }
        }