/* roulang page: index */
:root {
            --bg-dark: #0B1017;
            --surface-dark: #111A24;
            --bg-light: #F5F7FA;
            --surface-light: #FFFFFF;
            --text-light: #F7FAFC;
            --text-secondary: #C7D0DA;
            --text-muted: #7C8B9D;
            --ice: #41E0C4;
            --amber: #C9A05A;
            --warning: #D96A5A;
            --border-dark: rgba(255, 255, 255, 0.08);
            --border-light: #D8DEE6;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.35);
            --ease: cubic-bezier(0.2, 0, 0, 1);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s var(--ease);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 16px;
        }
        @media (min-width: 640px) {
            .container {
                padding: 0 32px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 48px;
            }
        }
        .section-padding {
            padding: 96px 0;
        }
        @media (max-width: 767px) {
            .section-padding {
                padding: 64px 0;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 16, 23, 0.94);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-dark);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo-main {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-light);
        }
        .logo-sub {
            font-size: 13px;
            font-weight: 500;
            color: var(--ice);
            letter-spacing: 0.02em;
        }
        .brand-domain {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            padding: 4px 10px;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-pill);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .channel-nav {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            position: relative;
            padding: 14px 2px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border-bottom: 2px solid transparent;
            transition: color 0.2s var(--ease);
            letter-spacing: 0.01em;
        }
        .channel-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 2px;
            background: var(--ice);
            transition: width 0.25s var(--ease);
        }
        .channel-link:hover {
            color: var(--text-light);
        }
        .channel-link:hover::after,
        .channel-link.active::after {
            width: 100%;
        }
        .channel-link.active {
            color: var(--ice);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: var(--radius-md);
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        @media (max-width: 767px) {
            .channel-nav {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .desktop-cta {
                display: none !important;
            }
        }
        .mobile-menu {
            position: fixed;
            inset: 0;
            background: var(--bg-dark);
            z-index: 200;
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 28px;
            padding: 40px 24px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-link {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-secondary);
            padding: 8px 16px;
        }
        .mobile-link.active {
            color: var(--ice);
        }
        .mobile-link:hover {
            color: var(--text-light);
        }
        .mobile-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(255, 255, 255, 0.06);
            border: none;
            color: var(--text-light);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            font-size: 18px;
            cursor: pointer;
        }
        .mobile-close:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            border: none;
            transition: all 0.2s var(--ease);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--ice);
            color: #061014;
        }
        .btn-primary:hover {
            background: #66f2d8;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(65, 224, 196, 0.25);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: var(--text-light);
        }
        .btn-secondary:hover {
            border-color: var(--ice);
            color: var(--ice);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-amber {
            background: var(--amber);
            color: #1a1406;
        }
        .btn-amber:hover {
            background: #ddbb72;
            box-shadow: 0 8px 24px rgba(201, 160, 90, 0.3);
            transform: translateY(-1px);
        }
        .btn-amber:active {
            transform: scale(0.98);
        }
        .btn-sm {
            min-height: 38px;
            padding: 0 20px;
            font-size: 14px;
        }
        .btn:focus-visible {
            outline: 2px solid var(--ice);
            outline-offset: 2px;
        }

        /* Cards */
        .card {
            background: var(--surface-dark);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dark);
            transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            background: #16212e;
        }
        .card-light {
            background: var(--surface-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            color: #1a2332;
        }

        /* Badges */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .badge-ice {
            background: rgba(65, 224, 196, 0.12);
            color: var(--ice);
        }
        .badge-amber {
            background: var(--amber);
            color: #1a1406;
        }
        .badge-warning {
            background: rgba(217, 106, 90, 0.15);
            color: var(--warning);
        }

        /* News List */
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 16px;
            border-bottom: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            transition: background 0.2s var(--ease), padding-left 0.2s var(--ease);
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: rgba(255, 255, 255, 0.03);
            padding-left: 22px;
        }
        .news-date {
            flex-shrink: 0;
            background: rgba(65, 224, 196, 0.1);
            color: var(--ice);
            font-size: 13px;
            font-weight: 500;
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            white-space: nowrap;
            font-variant-numeric: tabular-nums;
        }
        .news-body {
            flex: 1;
            min-width: 0;
        }
        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-light);
            line-height: 1.4;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-category {
            flex-shrink: 0;
            font-size: 12px;
            color: var(--ice);
            background: rgba(65, 224, 196, 0.08);
            border-radius: var(--radius-sm);
            padding: 4px 10px;
            white-space: nowrap;
        }
        .news-arrow {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 18px;
            transition: transform 0.2s var(--ease), color 0.2s var(--ease);
        }
        .news-item:hover .news-arrow {
            transform: translateX(4px);
            color: var(--ice);
        }
        @media (max-width: 639px) {
            .news-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 16px 12px;
            }
            .news-date {
                font-size: 12px;
            }
            .news-title {
                white-space: normal;
            }
            .news-category {
                font-size: 11px;
            }
        }
        .empty-state {
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
            border: 1px dashed rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            font-size: 15px;
        }

        /* Form */
        .form-input {
            width: 100%;
            background: var(--surface-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            font-size: 14px;
            color: #1a2332;
            transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
        }
        .form-input:focus {
            outline: none;
            border-color: var(--ice);
            box-shadow: 0 0 0 3px rgba(65, 224, 196, 0.18);
        }
        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: #1a2332;
            margin-bottom: 6px;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-dark);
            padding: 20px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            width: 100%;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 17px;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: var(--ice);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            font-size: 18px;
            font-weight: 300;
            transition: transform 0.3s var(--ease), background 0.2s;
            color: var(--ice);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: rgba(65, 224, 196, 0.25);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            opacity: 0;
            transition: max-height 0.35s var(--ease), opacity 0.3s var(--ease), padding 0.3s var(--ease);
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            opacity: 1;
            padding-top: 12px;
        }

        /* Footer */
        .site-footer {
            background: #080d13;
            border-top: 1px solid var(--border-dark);
            padding: 56px 0 32px;
        }
        .footer-link {
            color: var(--text-muted);
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: var(--ice);
        }

        /* Marquee / glow */
        @keyframes floatParticle {
            0% {
                transform: translateY(0) translateX(0);
                opacity: 0.3;
            }
            50% {
                opacity: 0.8;
            }
            100% {
                transform: translateY(-40px) translateX(20px);
                opacity: 0;
            }
        }
        .particle {
            position: absolute;
            width: 6px;
            height: 6px;
            background: rgba(65, 224, 196, 0.8);
            border-radius: 50%;
            animation: floatParticle 6s linear infinite;
            pointer-events: none;
        }
        .countdown-digit {
            font-variant-numeric: tabular-nums;
            display: inline-block;
            min-width: 2ch;
            text-align: center;
        }
        .countdown-box {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 12px 8px;
            min-width: 80px;
            text-align: center;
        }
        .countdown-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--ice);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
        }
        .countdown-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }

        /* Step ladder */
        .step-card {
            position: relative;
            background: var(--surface-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 32px 32px 32px 40px;
            display: flex;
            align-items: center;
            gap: 32px;
            min-height: 120px;
            transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(65, 224, 196, 0.3);
        }
        .step-index {
            font-size: 44px;
            font-weight: 800;
            color: rgba(65, 224, 196, 0.25);
            font-variant-numeric: tabular-nums;
            line-height: 1;
            flex-shrink: 0;
            width: 72px;
            text-align: center;
        }
        .step-content {
            flex: 1;
            min-width: 0;
        }
        .step-card .step-line {
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            border-radius: 0 4px 4px 0;
            background: var(--ice);
            opacity: 0;
            transition: opacity 0.2s;
        }
        .step-card:hover .step-line {
            opacity: 1;
        }
        @media (max-width: 767px) {
            .step-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding: 24px;
                min-height: auto;
            }
            .step-index {
                font-size: 32px;
                width: auto;
            }
            .step-card .step-img {
                width: 100% !important;
                height: 140px !important;
            }
        }

        /* Feature tick */
        .feature-list {
            list-style: none;
        }
        .feature-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            padding: 8px 0;
            font-size: 15px;
        }
        .feature-list li::before {
            content: '✓';
            color: var(--ice);
            font-weight: 700;
            flex-shrink: 0;
            margin-top: 2px;
            font-size: 16px;
        }

        /* Table compare */
        .compare-card {
            position: relative;
            background: var(--surface-dark);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dark);
            padding: 24px;
            transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
            color: var(--text-light);
        }
        .compare-card.recommended {
            border: 1.5px solid var(--ice);
            box-shadow: 0 0 0 3px rgba(65, 224, 196, 0.1), var(--shadow-md);
        }
        .compare-card.recommended::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--ice);
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .compare-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .compare-price {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Alert box */
        .notice-box {
            background: rgba(217, 106, 90, 0.08);
            border: 1px solid rgba(217, 106, 90, 0.25);
            border-radius: var(--radius-lg);
            padding: 24px;
            color: var(--text-light);
        }
        .notice-box h3 {
            color: var(--warning);
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .notice-box ul {
            list-style: none;
            padding: 0;
        }
        .notice-box li {
            padding: 4px 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .notice-box li::before {
            content: '·';
            color: var(--warning);
            font-weight: 700;
            margin-right: 6px;
        }

        /* Focus visible */
        .channel-link:focus-visible,
        .btn:focus-visible,
        .faq-question:focus-visible {
            outline: 2px solid var(--ice);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* Light section */
        .light-section {
            background: var(--bg-light);
            color: #1a2332;
        }
        .light-section h2,
        .light-section h3 {
            color: #111;
        }

/* roulang page: article */
:root {
            --bg-deep: #0B1017;
            --bg-surface: #111A24;
            --bg-light: #F5F7FA;
            --bg-white: #FFFFFF;
            --text-primary: #F7FAFC;
            --text-secondary: #C7D0DA;
            --text-muted: #7C8B9D;
            --ice: #41E0C4;
            --amber: #C9A05A;
            --warning: #D96A5A;
            --border-dark: rgba(255, 255, 255, 0.08);
            --border-light: #D8DEE6;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-deep: 0 16px 48px rgba(0, 0, 0, 0.35);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 48px;
            padding-right: 48px;
        }

        @media (max-width: 639px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-deep);
            border-bottom: 1px solid var(--border-dark);
            position: sticky;
            top: 0;
            z-index: 50;
            backdrop-filter: blur(16px);
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 8px;
            text-decoration: none;
            transition: opacity 0.2s cubic-bezier(0.2, 0, 0, 1);
        }

        .logo:hover {
            opacity: 0.85;
        }

        .logo-main {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .logo-sub {
            font-size: 13px;
            font-weight: 500;
            color: var(--ice);
            background: rgba(65, 224, 196, 0.12);
            padding: 2px 10px;
            border-radius: 999px;
        }

        .brand-domain {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: 0.02em;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .desktop-cta {
            display: inline-flex;
        }

        @media (max-width: 639px) {
            .desktop-cta {
                display: none;
            }
        }

        .menu-toggle {
            background: none;
            border: 1px solid var(--border-dark);
            border-radius: 8px;
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color 0.2s, color 0.2s;
        }

        .menu-toggle:hover {
            border-color: var(--ice);
            color: var(--ice);
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            padding-bottom: 12px;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-link {
            display: inline-block;
            padding: 8px 16px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            border-radius: 999px;
            white-space: nowrap;
            position: relative;
            transition: color 0.2s, background 0.2s;
        }

        .channel-link::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--ice);
            border-radius: 2px;
            opacity: 0;
            transform: scaleX(0.3);
            transition: opacity 0.2s, transform 0.2s cubic-bezier(0.2, 0, 0, 1);
        }

        .channel-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }

        .channel-link:hover::after {
            opacity: 1;
            transform: scaleX(1);
        }

        .channel-link.active {
            color: var(--text-primary);
            background: rgba(65, 224, 196, 0.08);
        }

        .channel-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        /* 移动端全屏菜单 */
        .mobile-menu {
            position: fixed;
            inset: 0;
            background: rgba(11, 16, 23, 0.98);
            backdrop-filter: blur(20px);
            z-index: 100;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 28px;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s cubic-bezier(0.2, 0, 0, 1);
        }

        .mobile-menu.open {
            opacity: 1;
            pointer-events: auto;
        }

        .mobile-close {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 28px;
            color: var(--text-primary);
            background: none;
            border: none;
            cursor: pointer;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: color 0.2s, background 0.2s;
        }

        .mobile-close:hover {
            color: var(--ice);
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-link {
            font-size: 22px;
            color: var(--text-primary);
            font-weight: 600;
            text-decoration: none;
            padding: 10px 28px;
            border-radius: 12px;
            transition: color 0.2s, background 0.2s;
        }

        .mobile-link:hover {
            color: var(--ice);
            background: rgba(65, 224, 196, 0.06);
        }

        .mobile-link.active {
            color: var(--ice);
            background: rgba(65, 224, 196, 0.10);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 28px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
            letter-spacing: 0.01em;
        }

        .btn-primary {
            background: var(--ice);
            color: #0B1017;
            box-shadow: 0 2px 8px rgba(65, 224, 196, 0.2);
        }

        .btn-primary:hover {
            background: #5be9d1;
            box-shadow: 0 4px 16px rgba(65, 224, 196, 0.3);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .btn-outline:hover {
            border-color: var(--ice);
            color: var(--ice);
            background: rgba(65, 224, 196, 0.05);
        }

        .btn-outline:active {
            transform: scale(0.98);
        }

        .btn-amber {
            background: var(--amber);
            color: #0B1017;
            box-shadow: 0 2px 12px rgba(201, 160, 90, 0.2);
        }

        .btn-amber:hover {
            background: #dbb06a;
            box-shadow: 0 4px 20px rgba(201, 160, 90, 0.35);
            transform: translateY(-1px);
        }

        .btn-amber:active {
            transform: scale(0.98);
        }

        .btn-sm {
            min-height: 38px;
            padding: 6px 18px;
            font-size: 14px;
            border-radius: 10px;
        }

        .btn-lg {
            min-height: 52px;
            padding: 14px 36px;
            font-size: 16px;
            border-radius: 14px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-area {
            background: var(--bg-deep);
            padding: 24px 0 8px;
            border-bottom: none;
        }

        .breadcrumb-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.2s;
        }

        .breadcrumb-nav a:hover {
            color: var(--ice);
        }

        .breadcrumb-nav .sep {
            color: rgba(255, 255, 255, 0.2);
            font-size: 12px;
        }

        .breadcrumb-nav .current {
            color: var(--ice);
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== Article Header ===== */
        .article-header-area {
            background: var(--bg-deep);
            padding: 48px 0 56px;
        }

        .article-header-card {
            max-width: 860px;
        }

        .article-header-card h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        @media (max-width: 767px) {
            .article-header-card h1 {
                font-size: 28px;
                line-height: 1.3;
            }
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .meta-item svg {
            width: 16px;
            height: 16px;
            opacity: 0.7;
        }

        .meta-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(65, 224, 196, 0.12);
            color: var(--ice);
            border: 1px solid rgba(65, 224, 196, 0.2);
        }

        /* ===== Article Body ===== */
        .article-body-area {
            background: var(--bg-light);
            padding: 64px 0 96px;
        }

        .article-content-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            padding: 56px;
            max-width: 860px;
            margin: 0 auto;
            color: #1e2836;
        }

        @media (max-width: 767px) {
            .article-content-card {
                padding: 28px 20px;
                border-radius: 12px;
            }
        }

        /* 正文排版 */
        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: #1e2836;
        }

        .article-content h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: #0B1017;
            margin: 2em 0 0.8em;
            padding-top: 0.2em;
        }

        .article-content h3 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.4;
            color: #111A24;
            margin: 1.8em 0 0.6em;
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content ul,
        .article-content ol {
            margin: 1em 0 1.5em;
            padding-left: 1.5em;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5em;
        }

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

        .article-content a {
            color: #0d8f7c;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: #0b6b5b;
        }

        .article-content blockquote {
            border-left: 3px solid var(--ice);
            padding: 16px 20px;
            background: rgba(65, 224, 196, 0.06);
            border-radius: 0 10px 10px 0;
            margin: 1.5em 0;
            color: #3a4a5a;
            font-style: normal;
        }

        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-content img {
            border-radius: 12px;
            max-width: 100%;
            height: auto;
            margin: 1.5em 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border-light);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content table th {
            background: #F5F7FA;
            font-weight: 600;
            color: #0B1017;
        }

        .article-content table tr:hover {
            background: #FAFBFC;
        }

        .article-content code {
            background: rgba(65, 224, 196, 0.12);
            color: #0d7a6b;
            border-radius: 4px;
            padding: 2px 8px;
            font-size: 0.9em;
            font-family: "SFMono-Regular", Consolas, monospace;
        }

        .article-content pre {
            background: var(--bg-surface);
            color: var(--text-primary);
            border-radius: 12px;
            padding: 20px;
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 14px;
            line-height: 1.7;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
            font-size: inherit;
        }

        .article-content hr {
            border: none;
            border-top: 1px solid var(--border-light);
            margin: 2em 0;
        }

        /* ===== 标签区 ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-right: 4px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(65, 224, 196, 0.08);
            color: #0d8f7c;
            text-decoration: none;
            border: 1px solid rgba(65, 224, 196, 0.15);
            transition: background 0.2s, color 0.2s, transform 0.2s;
        }

        .tag-pill:hover {
            background: rgba(65, 224, 196, 0.18);
            color: #0b6b5b;
            transform: translateY(-1px);
        }

        /* ===== 上一篇/下一篇 ===== */
        .article-pager {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }

        .pager-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 20px;
            border-radius: 10px;
            font-size: 14px;
            color: #3a4a5a;
            background: #F5F7FA;
            border: 1px solid var(--border-light);
            text-decoration: none;
            transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
        }

        .pager-link:hover {
            border-color: var(--ice);
            color: #0d8f7c;
            background: rgba(65, 224, 196, 0.05);
            transform: translateY(-1px);
        }

        /* ===== 空状态 ===== */
        .article-not-found {
            max-width: 720px;
            margin: 0 auto;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            padding: 80px 48px;
            text-align: center;
        }

        .not-found-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 20px;
            background: rgba(65, 224, 196, 0.08);
            border: 1px solid rgba(65, 224, 196, 0.15);
        }

        .not-found-icon svg {
            width: 36px;
            height: 36px;
            color: #0d8f7c;
        }

        .article-not-found h1 {
            font-size: 32px;
            font-weight: 700;
            color: #0B1017;
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-muted);
            font-size: 15px;
            margin-bottom: 32px;
            max-width: 340px;
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 639px) {
            .article-not-found {
                padding: 56px 24px;
            }
            .article-not-found h1 {
                font-size: 24px;
            }
        }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--bg-deep);
            padding: 96px 0;
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 320px;
            text-align: right;
        }

        @media (max-width: 767px) {
            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .section-head p {
                text-align: left;
            }
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        @media (max-width: 767px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        .related-card {
            display: block;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dark);
            overflow: hidden;
            text-decoration: none;
            color: inherit;
            transition: transform 0.2s cubic-bezier(0.2, 0, 0, 1), border-color 0.2s, box-shadow 0.2s;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(65, 224, 196, 0.3);
            box-shadow: var(--shadow-md);
        }

        .related-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
            transition: transform 0.4s cubic-bezier(0.2, 0, 0, 1);
        }

        .related-card:hover .related-card-img {
            transform: scale(1.03);
        }

        .related-card-img-wrap {
            overflow: hidden;
            position: relative;
        }

        .related-card .badge {
            position: absolute;
            top: 16px;
            left: 16px;
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(11, 16, 23, 0.8);
            color: var(--ice);
            border: 1px solid rgba(65, 224, 196, 0.2);
            backdrop-filter: blur(8px);
        }

        .related-card-body {
            padding: 24px;
        }

        .related-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color 0.2s;
        }

        .related-card:hover .related-card-body h3 {
            color: var(--ice);
        }

        .related-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .related-card .card-time {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .related-card .card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--ice);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }

        .related-card:hover .card-link {
            gap: 8px;
        }

        /* ===== CTA ===== */
        .contact-cta {
            background: var(--bg-deep);
            padding: 48px 0 96px;
            border-top: 1px solid var(--border-dark);
        }

        .cta-card {
            background: var(--bg-surface);
            border: 1px solid rgba(65, 224, 196, 0.15);
            border-radius: var(--radius-lg);
            padding: 48px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .cta-card h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .cta-card p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 480px;
        }

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

        @media (max-width: 767px) {
            .cta-card {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-dark);
            padding: 64px 0 32px;
        }

        .footer-link {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.2s;
            display: inline-flex;
            align-items: center;
        }

        .footer-link:hover {
            color: var(--ice);
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--ice);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== 打印 ===== */
        @media print {
            .site-header,
            .mobile-menu,
            .related-section,
            .contact-cta,
            .site-footer {
                display: none !important;
            }
            .article-body-area {
                background: #fff;
                padding: 24px;
            }
            .article-content-card {
                box-shadow: none;
                padding: 0;
            }
        }

/* roulang page: category1 */
:root {
            --bg-dark: #0B1017;
            --bg-panel: #111A24;
            --bg-light: #F5F7FA;
            --bg-card: #FFFFFF;
            --text-primary-dark: #F7FAFC;
            --text-secondary-dark: #C7D0DA;
            --text-muted: #7C8B9D;
            --ice: #41E0C4;
            --amber: #C9A05A;
            --danger: #D96A5A;
            --border-dark: rgba(255, 255, 255, 0.08);
            --border-light: #D8DEE6;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.25);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.35);
            --transition-base: all .2s cubic-bezier(0.2, 0, 0, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-dark);
            color: var(--text-primary-dark);
            line-height: 1.7;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        body.lock {
            overflow: hidden;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(65, 224, 196, 0.35);
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (min-width: 640px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding-left: 48px;
                padding-right: 48px;
            }
        }

        .section {
            padding: 96px 0;
        }

        @media (max-width: 1023px) {
            .section {
                padding: 72px 0;
            }
        }

        @media (max-width: 639px) {
            .section {
                padding: 56px 0;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 16, 23, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-dark);
        }

        .site-header .container {
            display: flex;
            flex-direction: column;
        }

        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            flex-shrink: 0;
        }

        .logo-main {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary-dark);
            letter-spacing: -0.02em;
            transition: var(--transition-base);
        }

        .logo:hover .logo-main {
            color: var(--ice);
        }

        .logo-sub {
            font-size: 12px;
            font-weight: 500;
            color: var(--ice);
        }

        .brand-domain {
            margin-left: 4px;
            font-size: 12px;
            color: var(--text-muted);
            font-family: "SF Mono", "Menlo", monospace;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .desktop-cta {
            display: inline-flex;
        }

        @media (max-width: 767px) {
            .desktop-cta {
                display: none;
            }
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.04);
            border-radius: 12px;
            color: var(--text-secondary-dark);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .menu-toggle:hover {
            color: var(--ice);
            border-color: rgba(65, 224, 196, 0.4);
        }

        @media (max-width: 767px) {
            .menu-toggle {
                display: inline-flex;
            }
        }

        .channel-nav {
            display: flex;
            gap: 28px;
            height: 48px;
            align-items: center;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            overflow-x: auto;
            scrollbar-width: none;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary-dark);
            padding: 12px 2px 8px;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .channel-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--ice);
            transition: var(--transition-base);
        }

        .channel-link:hover {
            color: var(--ice);
        }

        .channel-link.active {
            color: var(--ice);
        }

        .channel-link:hover::after,
        .channel-link.active::after {
            width: 100%;
        }

        @media (max-width: 767px) {
            .channel-nav {
                display: none;
            }
        }

        /* Mobile menu */
        .mobile-menu {
            position: fixed;
            inset: 0;
            background: rgba(11, 16, 23, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 100;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 28px;
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s ease, visibility .3s ease;
        }

        .mobile-menu.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-close {
            position: absolute;
            top: 12px;
            right: 16px;
            font-size: 36px;
            font-weight: 300;
            color: var(--text-primary-dark);
            background: none;
            border: none;
            cursor: pointer;
            width: 48px;
            height: 48px;
            line-height: 48px;
            text-align: center;
            transition: var(--transition-base);
        }

        .mobile-close:hover {
            color: var(--ice);
            transform: rotate(90deg);
        }

        .mobile-link {
            font-size: 22px;
            font-weight: 600;
            color: var(--text-secondary-dark);
            padding: 8px 0;
            transition: var(--transition-base);
        }

        .mobile-link.active,
        .mobile-link:hover {
            color: var(--ice);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 26px;
            border-radius: var(--radius-full);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.01em;
            text-decoration: none;
            border: 1px solid transparent;
            cursor: pointer;
            line-height: 1;
            transition: var(--transition-base);
            font-family: inherit;
        }

        .btn-primary {
            background: var(--ice);
            color: #0B1017;
            box-shadow: 0 2px 10px rgba(65, 224, 196, 0.18);
        }

        .btn-primary:hover {
            filter: brightness(1.08);
            box-shadow: 0 6px 18px rgba(65, 224, 196, 0.28);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.22);
            color: var(--text-primary-dark);
        }

        .btn-ghost:hover {
            border-color: var(--ice);
            color: var(--ice);
        }

        .btn-ghost:active {
            transform: scale(0.98);
        }

        .btn-amber {
            background: var(--amber);
            color: #0B1017;
            box-shadow: 0 2px 12px rgba(201, 160, 90, 0.22);
        }

        .btn-amber:hover {
            filter: brightness(1.08);
            box-shadow: 0 6px 22px rgba(201, 160, 90, 0.35);
            transform: translateY(-1px);
        }

        .btn-amber:active {
            transform: scale(0.98);
        }

        .btn-sm {
            height: 38px;
            padding: 0 18px;
            font-size: 14px;
        }

        /* Badge / section-tag */
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--ice);
            background: rgba(65, 224, 196, 0.12);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
        }

        .section-tag-dark {
            color: #0E9B82;
            background: rgba(65, 224, 196, 0.16);
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--ice);
            background: rgba(65, 224, 196, 0.12);
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }

        .badge-amber {
            color: #0B1017;
            background: var(--amber);
        }

        /* Hero / banner */
        .page-banner {
            position: relative;
            overflow: hidden;
            background-color: var(--bg-dark);
            padding: 88px 0;
        }

        @media (max-width: 767px) {
            .page-banner {
                padding: 64px 0;
            }
        }

        .page-banner .bg-image {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }

        .page-banner .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(95deg, rgba(11, 16, 23, 0.96) 0%, rgba(11, 16, 23, 0.82) 55%, rgba(11, 16, 23, 0.4) 100%);
        }

        .banner-glow {
            position: absolute;
            width: 480px;
            height: 480px;
            right: -120px;
            top: -160px;
            border-radius: 9999px;
            background: radial-gradient(circle, rgba(65, 224, 196, 0.12) 0%, transparent 68%);
            pointer-events: none;
        }

        .banner-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px 36px;
            margin-top: 40px;
        }

        .banner-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary-dark);
        }

        .banner-stat .dot {
            width: 6px;
            height: 6px;
            border-radius: 9999px;
            background: var(--ice);
            box-shadow: 0 0 10px rgba(65, 224, 196, 0.6);
        }

        /* Alternate blocks */
        .alt-block {
            padding: 96px 0;
        }

        @media (max-width: 1023px) {
            .alt-block {
                padding: 72px 0;
            }
        }

        @media (max-width: 639px) {
            .alt-block {
                padding: 56px 0;
            }
        }

        .check-list {
            list-style: none;
            margin: 24px 0 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .check-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .check-list .marker {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 10px;
            background: rgba(65, 224, 196, 0.14);
            color: #0E9B82;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            margin-top: 2px;
        }

        .check-list .marker-ice-dark {
            background: rgba(65, 224, 196, 0.16);
            border: 1px solid rgba(65, 224, 196, 0.3);
            color: var(--ice);
        }

        .number-list {
            list-style: none;
            margin: 24px 0 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 18px;
            counter-reset: step;
        }

        .number-list li {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .number-list .num {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            border-radius: 9999px;
            background: rgba(65, 224, 196, 0.14);
            border: 1px solid rgba(65, 224, 196, 0.35);
            color: var(--ice);
            font-size: 14px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .img-frame {
            position: relative;
        }

        .img-frame::before {
            content: '';
            position: absolute;
            top: -14px;
            left: -14px;
            width: 112px;
            height: 112px;
            border-radius: 20px;
            background: rgba(65, 224, 196, 0.08);
            border: 1px solid rgba(65, 224, 196, 0.18);
            z-index: 0;
        }

        .img-frame img {
            position: relative;
            z-index: 1;
            border-radius: 16px;
            box-shadow: 0 18px 44px rgba(0, 0, 0, 0.18);
            transition: transform .4s ease;
        }

        .img-frame:hover img {
            transform: scale(1.012);
        }

        .img-frame.frame-right::before {
            left: auto;
            right: -14px;
        }

        /* CTA block */
        .cta-block {
            position: relative;
            overflow: hidden;
            padding: 64px 0;
            background-color: var(--bg-dark);
        }

        .cta-block::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: min(680px, 85%);
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(201, 160, 90, 0.85), transparent);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner .btn {
            min-width: 140px;
        }

        .cta-orb {
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 9999px;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            background: radial-gradient(circle, rgba(201, 160, 90, 0.07) 0%, transparent 65%);
            pointer-events: none;
        }

        /* FAQ */
        .faq-list {
            border-top: 1px solid var(--border-light);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
        }

        .faq-q {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding: 20px 0;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: #111A24;
            text-align: left;
            transition: color .2s ease;
            font-family: inherit;
            line-height: 1.5;
        }

        .faq-q:hover {
            color: #0E9B82;
        }

        .faq-q .icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            position: relative;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .faq-q .icon::before,
        .faq-q .icon::after {
            content: '';
            position: absolute;
            background: currentColor;
            border-radius: 2px;
            transition: all .25s ease;
        }

        .faq-q .icon::before {
            width: 14px;
            height: 2px;
        }

        .faq-q .icon::after {
            width: 2px;
            height: 14px;
        }

        .faq-item.open .faq-q {
            color: #0E9B82;
        }

        .faq-item.open .faq-q .icon::after {
            transform: scaleY(0);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-item.open .faq-a {
            max-height: 320px;
        }

        .faq-a p {
            padding: 0 0 22px;
            margin: 0;
            color: #5A6577;
            font-size: 15px;
            line-height: 1.85;
        }

        /* Contact / form */
        .contact-section {
            position: relative;
            background-color: var(--bg-dark);
            overflow: hidden;
        }

        .contact-section::after {
            content: '';
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 9999px;
            left: -180px;
            bottom: -220px;
            background: radial-gradient(circle, rgba(65, 224, 196, 0.1) 0%, transparent 65%);
            pointer-events: none;
        }

        .form-card {
            background: #FFFFFF;
            border-radius: 16px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            padding: 28px;
            position: relative;
            z-index: 2;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 6px;
            color: #111A24;
        }

        .form-input {
            width: 100%;
            height: 44px;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            padding: 0 14px;
            font-size: 15px;
            background: #FFFFFF;
            color: #111A24;
            transition: all .2s ease;
            font-family: inherit;
        }

        .form-input::placeholder {
            color: #9AA5B2;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--ice);
            box-shadow: 0 0 0 3px rgba(65, 224, 196, 0.2);
        }

        .form-textarea {
            width: 100%;
            min-height: 88px;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            padding: 12px 14px;
            font-size: 15px;
            resize: vertical;
            background: #FFFFFF;
            color: #111A24;
            font-family: inherit;
            transition: all .2s ease;
        }

        .form-textarea::placeholder {
            color: #9AA5B2;
        }

        .form-textarea:focus {
            outline: none;
            border-color: var(--ice);
            box-shadow: 0 0 0 3px rgba(65, 224, 196, 0.2);
        }

        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235A6577' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            padding-right: 40px;
            cursor: pointer;
        }

        .privacy-note {
            font-size: 12px;
            color: #8A95A5;
            line-height: 1.6;
            margin-top: 4px;
        }

        /* Footer */
        .site-footer {
            background: #090D13;
            border-top: 1px solid var(--border-dark);
            padding: 56px 0 28px;
        }

        .footer-link {
            position: relative;
            display: inline-block;
            font-size: 15px;
            color: #7C8B9D;
            padding: 4px 0;
            transition: var(--transition-base);
        }

        .footer-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 1px;
            background: var(--ice);
            transition: var(--transition-base);
        }

        .footer-link:hover {
            color: var(--ice);
        }

        .footer-link:hover::after {
            width: 100%;
        }

        /* Utility */
        .display-fw {
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .lead-text {
            font-size: 17px;
            line-height: 1.8;
            color: #4E5968;
        }

        .lead-text-dark {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary-dark);
        }

        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }

        /* Particles */
        @keyframes floatParticle {
            0%,
            100% {
                transform: translateY(0) scale(1);
                opacity: 0.25;
            }
            50% {
                transform: translateY(-18px) scale(1.25);
                opacity: 0.7;
            }
        }

        .particle {
            position: absolute;
            width: 6px;
            height: 6px;
            border-radius: 9999px;
            background: var(--ice);
            filter: blur(0.5px);
            pointer-events: none;
            animation: floatParticle 6s ease-in-out infinite;
        }

        /* Responsive adjust */
        @media (max-width: 639px) {
            .banner-stats {
                gap: 14px 20px;
                margin-top: 28px;
            }

            .faq-q {
                font-size: 15px;
            }

            .cta-inner .btn {
                min-width: 0;
                width: 100%;
            }

            .cta-inner .flex {
                flex-direction: column;
                gap: 12px;
            }

            .form-card {
                padding: 20px;
            }

            .img-frame::before {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --bg-dark: #0B1017;
            --surface-dark: #111A24;
            --surface-light: #F5F7FA;
            --bg-white: #FFFFFF;
            --text-main: #F7FAFC;
            --text-secondary: #C7D0DA;
            --text-weak: #7C8B9D;
            --accent-ice: #41E0C4;
            --accent-amber: #C9A05A;
            --warning-red: #D96A5A;
            --border-dark: rgba(255,255,255,0.08);
            --border-light: #D8DEE6;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.25);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.35);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .2s cubic-bezier(.2, 0, 0, 1);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        textarea,
        select {
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 48px;
        }
        @media (max-width: 1023px) {
            .container {
                padding: 0 24px;
            }
        }
        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 16, 23, .92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-dark);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }
        .logo {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }
        .logo-main {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -.02em;
            color: var(--text-main);
        }
        .logo-sub {
            font-size: 12px;
            font-weight: 500;
            color: var(--accent-ice);
        }
        .brand-domain {
            font-size: 12px;
            color: var(--text-weak);
            letter-spacing: .02em;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .menu-toggle {
            display: none;
            color: var(--text-main);
            padding: 6px;
            border-radius: var(--radius-md);
            transition: background .2s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, .08);
        }
        .channel-nav {
            display: flex;
            gap: 32px;
            padding: 0 0 14px;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            white-space: nowrap;
            transition: color .2s cubic-bezier(.2, 0, 0, 1);
        }
        .channel-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--accent-ice);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s cubic-bezier(.2, 0, 0, 1);
        }
        .channel-link:hover {
            color: var(--text-main);
        }
        .channel-link:hover::after {
            transform: scaleX(1);
        }
        .channel-link.active {
            color: var(--text-main);
        }
        .channel-link.active::after {
            transform: scaleX(1);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 600;
            transition: all .2s cubic-bezier(.2, 0, 0, 1);
            outline: none;
        }
        .btn:focus-visible {
            box-shadow: 0 0 0 3px rgba(65, 224, 196, .4);
        }
        .btn:active {
            transform: scale(.98);
        }
        .btn-primary {
            background: var(--accent-ice);
            color: #0B1017;
        }
        .btn-primary:hover {
            background: #5CE8D0;
            box-shadow: 0 4px 20px rgba(65, 224, 196, .3);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .25);
            color: var(--text-main);
        }
        .btn-secondary:hover {
            border-color: var(--accent-ice);
            color: var(--accent-ice);
        }
        .btn-amber {
            background: var(--accent-amber);
            color: #0B1017;
        }
        .btn-amber:hover {
            background: #D9B26C;
            box-shadow: 0 4px 20px rgba(201, 160, 90, .35);
        }
        .btn-sm {
            min-height: 36px;
            padding: 0 16px;
            font-size: 13px;
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu {
            display: none;
        }
        @media (max-width: 767px) {
            .menu-toggle {
                display: inline-flex;
            }
            .desktop-cta {
                display: none;
            }
            .channel-nav {
                display: none;
            }
            .mobile-menu {
                display: flex;
                flex-direction: column;
                position: fixed;
                inset: 0;
                background: rgba(11, 16, 23, .98);
                z-index: 200;
                padding: 80px 32px 32px;
                opacity: 0;
                visibility: hidden;
                transition: all .3s cubic-bezier(.2, 0, 0, 1);
            }
            .mobile-menu.open {
                opacity: 1;
                visibility: visible;
            }
            .mobile-close {
                position: absolute;
                top: 24px;
                right: 24px;
                font-size: 32px;
                color: var(--text-main);
                line-height: 1;
                padding: 8px;
            }
            .mobile-link {
                font-size: 22px;
                font-weight: 600;
                color: var(--text-secondary);
                padding: 16px 0;
                border-bottom: 1px solid var(--border-dark);
                transition: color .2s;
            }
            .mobile-link:hover,
            .mobile-link.active {
                color: var(--accent-ice);
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #070C12;
            border-top: 1px solid var(--border-dark);
            padding: 64px 0 32px;
        }
        .footer-link {
            display: inline-block;
            font-size: 14px;
            color: var(--text-weak);
            transition: color .2s;
        }
        .footer-link:hover {
            color: var(--accent-ice);
        }

        /* ===== Section ===== */
        .section {
            padding: 64px 0;
        }
        @media (min-width: 1024px) {
            .section {
                padding: 96px 0;
            }
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
        }
        .badge-ice {
            background: rgba(65, 224, 196, .12);
            color: var(--accent-ice);
        }
        .badge-amber {
            background: var(--accent-amber);
            color: #0B1017;
            font-weight: 600;
        }

        /* ===== Card ===== */
        .card {
            background: var(--surface-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all .2s cubic-bezier(.2, 0, 0, 1);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        /* ===== Point Nav ===== */
        .point-nav {
            position: sticky;
            top: 120px;
            background: var(--surface-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 12px;
        }
        .point-link {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-left: 2px solid transparent;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            transition: all .2s;
        }
        .point-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, .04);
        }
        .point-link.active {
            color: var(--accent-ice);
            border-left-color: var(--accent-ice);
            background: rgba(65, 224, 196, .06);
        }

        /* ===== Notice ===== */
        .notice {
            border-left: 4px solid var(--warning-red);
            background: var(--bg-white);
            border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
            padding: 28px 32px;
            box-shadow: var(--shadow-sm);
        }
        .notice-title {
            color: var(--warning-red);
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* ===== Keyframes ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp .6s cubic-bezier(.2, 0, 0, 1) both;
        }
        .delay-1 {
            animation-delay: .08s;
        }
        .delay-2 {
            animation-delay: .16s;
        }
        .delay-3 {
            animation-delay: .24s;
        }

        @keyframes floatParticle {
            0%,
            100% {
                transform: translateY(0) scale(1);
                opacity: .05;
            }
            50% {
                transform: translateY(-24px) scale(1.15);
                opacity: .12;
            }
        }
        .particle {
            position: absolute;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-ice);
            animation: floatParticle 6s ease-in-out infinite;
            pointer-events: none;
        }

        /* ===== Stat Card ===== */
        .stat-card {
            background: var(--surface-dark);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            transition: all .2s;
        }
        .stat-card:hover {
            border-color: rgba(65, 224, 196, .3);
            box-shadow: var(--shadow-sm);
        }
        .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-ice);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            letter-spacing: -.02em;
        }

        /* ===== Benefit Block ===== */
        .benefit-block {
            margin-bottom: 24px;
        }
        .benefit-block:last-child {
            margin-bottom: 0;
        }

        /* ===== Responsive Tablet ===== */
        @media (max-width: 1023px) {
            .point-nav {
                position: static;
                display: flex;
                gap: 8px;
                overflow-x: auto;
                padding: 8px;
                margin-bottom: 24px;
                border-radius: var(--radius-lg);
                scrollbar-width: none;
            }
            .point-nav::-webkit-scrollbar {
                display: none;
            }
            .point-link {
                white-space: nowrap;
                border-left: none;
                border-radius: var(--radius-pill);
                padding: 8px 16px;
                background: rgba(255, 255, 255, .03);
            }
            .point-link.active {
                background: rgba(65, 224, 196, .1);
                border-left: none;
            }
        }